Company dynamics - Advance Energy (Shenzhen) Co., Ltd.

Jun
09
2022

What if the lithium battery catches fire？ Fire precautions for lithium batteries

According to the Local Fire Service of Australia (CFA), on July 30 2021 a fire broke out at an electrical storage facility in Moorabool, Australia, a 13-tonne Set of Tesla Megapack batteries caught fire and more than 30 fire engines arrived at the scene to take part in the operation, which took 150 firefighters four days to contain until August 3. Battery fire is an extreme safety accident, large to energy storage power station, small to electronic toys, battery fire is not necessarily the cause of the battery (core), may also be caused by electrical failure of the battery system. What if the battery catches fire? The cause of the fire in the lithium battery The essence of lithium battery fire is that the heat in the battery is not released according to the design intention, causing the internal and external combustion material to catch fire after ignition, the main causes are external short circuit, external high temperature and internal short circuit. 1, internal short circuit: due to the abuse of batteries, such as overcharged, battery production process dust and other long-term use of dust and dust to produce a micro-short circuit, the release of electrical energy led to temperature rise, temperature rise brought about by the material chemical reaction expanded the short circuit path, forming a larger short-circuit current, resulting in out-of-control heat fire. 2, external short circuit: take electric vehicle as an example, in the extreme case, short circuit point over the vehicle fuse, while the battery management system failure, a longer period of time external short circuit will generally lead to the connection weak point in the circuit burned, thus causing the external short circuit fire. 3, external high temperature: due to the characteristics of lithium battery structure, high temperature core internal material decomposition reaction, electrolyte decomposition will also react with positive and negative poles, core diaphragm will melt and decompose, a variety of reactions lead to a large amount of heat generation. The melting of the diaphragm causes the internal short circuit, the core explosion-proof film to rupture, the electrolyte ejection, resulting in burning fire. Lithium battery fire extinguishing procedures Analyzing the causes of battery fires, when lithium batteries need to be put out to fight fires, let's look at Tesla's recommendations: 1, if encountered a small fire, the flame did not spread to the high-pressure battery part, can use carbon dioxide or ABC dry powder fire extinguisher fire extinguisher. 2, in a thorough inspection of the fire, do not come into contact with any high-voltage components, always use insulation tools to check. 3, if the high voltage battery in the fire bending, twisting, damage, in short, become not like, or suspect that the battery problem. Then the water consumption when extinguishing the fire should not be too small, fire water should be sufficient. Battery fire may take 24 hours to completely extinguish. Using a thermal camera ensures that the high voltage battery is completely cooled before the accident is completely complete. If you do not have a thermal camera, you must monitor the battery for re-ignition. Smoke indicates that the battery is still hot and monitoring will remain in control until at least an hour after the battery is no longer smoking. According to the U.S. Fire Protection Agency, electric vehicles can catch fire "over 2,760 degrees Celsius" and "the use of water or foam can cause violent flames, as water molecules break down into explosive hydrogen and oxygen." So it's not safe to put out a small amount of water, and an electric car alone requires dozens of tons of water. Simply, lithium battery fire fighting uses a lot of water to cool the battery, it takes a long time and patience, cooling is the key. Electrical safety monitoring subsystem Energy storage systems and fire protection systems are not separate units, but should become a centralized and intelligent whole, improving the system flexibility and safety of fire protection systems is fundamental to ensuring the commercialization of energy storage systems. In the future, the new energy storage mode and fire protection plan will increase, and the energy storage fire protection system will gradually tend to be centralized and intelligent. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Mar
28
2022

LITHIUM IRON PHOSPHATE BATTERY

LITHIUM IRON PHOSPHATE BATTERY ADVANTAGES Lithium iron phosphate batteries (LiFePO4 or LFP) offer lots of benefits compared to lead-acid batteries and other lithium batteries. Longer life span, no maintenance, extremely safe, lightweight, improved discharge and charge efficiency, just to name a few. LiFePO4 batteries are not the cheapest in the market, but due to a long life span and zero maintenance, it’s the best investment you can make over time. LITHIUM HAS A LONG LIFESPAN lithium iron phosphate batteries live up to more 2000 cycles at 80 percent depth of discharge, without decreasing in performance. The average lifetime of lead-acid batteries is just two years. NO ACTIVE MAINTENANCE Lithium iron phosphate batteries (LiFePO4) don’t require active maintenance to extend their service life. Also, the batteries show no memory effects and due to low self-discharge (<3% per month), you can store them for a longer period of time. Lead-acid batteries need special maintenance. If not their life span will be decreased even more. HIGH EFFICIENCY Lithium iron phosphate batteries (LiFePO4) have 100% of their capacity available. Additionally, their fast charge and discharge rates cause them to be a great fit for all sorts of applications. Fast charging reduces any downtime and increases efficiency. High discharge pulse currents deliver bursts of power in a short amount of time. SAFETY To achieve high safety with our batteries, we use only the high quality cells of the safest technology available today: lithium iron phosphate (LiFePO4 or LFP). In combination with our Battery Management System (BMS) developed by our innovative engineering team, we can guarantee the safety and reliability of our batteries. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Mar
10
2022

Durability, Reliability, and Cost Effectiveness

Battery life is defined by the number of charge/discharge cycles a battery can survive. Some testing has shown that lithium iron phosphate batteries can last about 2,000 charge/discharge cycles, compared to perhaps 1,000 for lithium ion batteries. These tests go to the point where the batteries hold noticeably less charge, rather than testing to a point of utter failure. The primary problem with lithium cells is their degradation. Over time a lithium ion cell will lose capacity, with a total lifetime of 2-3 years. The exact lifetime is a function of the amount of use, the amount discharged between recharging, and other factors such as the temperature of the cells. Note: The discharge rate of a Li-ion battery keeps increasing over the time as compared to Li-iron. Long life, slow discharge rate and less weight should be basic features of a daily use battery which is when a lithium iron battery is appreciated as it is expected to have a longer “shelf life” than a Li-ion. When not in use, a battery should not lose its charge at a faster rate. It should deliver almost same performance if using after a year or so. This so called shelf life is around 350 days for lithium-iron and about 300 days for a lithium-ion battery. Cobalt is more expensive than the iron and phosphate used in Li-iron. So the lithium-iron phosphate battery costs less (safer materials make it less expensive to manufacture and to recycle) to the consumer than the lithium-ion battery. A lithium power source can offer significant advantages if: A high voltage is needed (i.e. 3.0 to 3.9 volts per cell) A recharging circuit is not available or too costly The power source has to be as light weight as possible Long shelf life is required A wide temperature range is required Reliability is crucial Extremely high energy density is needed Environmental concerns such as temperature, vibration or shock are especially severe Your application demands a continuous source of power for extensive periods of time ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Feb
14
2022

STORING LITHIUM IRON PHOSPHATE BATTERIES

Some people use their LiFePO4 batteries seasonally such as while camping in the summer or while ice fishing in the winter. It is common for some people to store lithium batteries during the off-season. When storing LiFePO4 batteries, it is important to store them properly to ensure they do not get damaged and to keep them at peak performance for many years ahead. HOW TO STORE LIFEPO4 BATTERIES? How do I store my lithium battery? A question we receive from our customers on a daily basis, especially in the Winter season. The answer depends on the temperature you are storing the batteries in and the period of time. Here’s a summary of how to store your LiFePO4 battery: Recommended storage temperature: -5 to +35°C (23 to 95 °F) Storage up to 1 month: -20 to +60°C (4 to 140 °F) Storage up to 3 month: -10 to +35°C (14 to 95 °F) Extended storage time: +15 to +35°C (59 to 95 °F) It is highly recommended to store lithium batteries indoors during the off-season. It is also recommended to store LiFePO4 batteries at about a 50% state of charge (SOC) or higher. If batteries are stored for long periods of time, cycle the batteries at least once every 6 months. Do not store batteries that are discharged. DISCONNECT BEFORE STORING LIFEPO4 Many customers have main switches to disconnect the power to the batteries. We recommend that you take the extra step to ensure the batteries are TRULY disconnected. This is because many RVs would still have components running in the background, such as the C02 sensor, backlit stereo, or some other emergency sensor that may be bypassing the main disconnect switch. The best thing to do when you’re storing the batteries is to physically disconnect the main positive and negative wires from the lithium batteries. This will ensure that during storage time, the battery is not being discharged and that you have plenty of charge in the LiFePO4 batteries when you use them again. Make sure you always use a lithithium charger and not one meant for other battery chemistries. LiFePO4 batteries have a low self-discharge rate of 2% a month. This means that when a lithium battery is stored, it’ll lose 2% of its charge capacity every month. In order to prevent a higher rate of discharge, we recommend disconnecting all power draw from your batteries. When you store LiFePO4 batteries, it is important that you store them with a state of charge (SOC) of 50% or higher. A higher state of charge is recommended when storing for an extended period of time. If you want the battery to retain a good level of charge after the storage period is over, you should charge them to 100% and store them in that fully charged state. HOW TO STORE LIFEPO4 WITH SYSTEM If you are storing your LiFePO4 batteries along with your entire system; such as your charger and inverter, we recommend using a battery guardian, which protects LiFePO4 batteries by disconnecting them from parasitic loads once a voltage of 11.5V is reached. If you do not have a disconnect switch installed, it is recommended that you remove the main battery connections. It is okay that the charger is disconnected while the batteries are stored since LiFePO4 batteries do not require a trickle charge. HOW TO STORE LIFEPO4 IN COLD WEATHER Lithium cells are not affected by extreme temperatures if the battery pack is not being used. We do not recommend storing lithium batteries in very cold temperatures for extended periods of time because that could cause the ABS casing of the battery pack to potentially crack. In addition to this, hot temperatures beyond 60°C (140°F) can cause damage to other components in the battery pack, therefore it’s best to always avoid high temperatures for long periods of time. It is always recommended to store lithium batteries indoors and at room temperature. RISK OF NOT CHARGING BEFORE BATTERY STORAGE There are major consequences if you store your LiFePO4 battery without a charge. Because of the 2% self-discharge rate, the battery can become over-discharged. The level of discharge can potentially go below what the BMS can protect. This is why it is very important to charge your lithium battery before you store it. It is highly recommended that you also store the lithium battery at room temperature, especially when storing them for an extended period of time. Refer back to the first paragraph of this article to see how long you can store LiFePO4 at various temperature ranges. Over-discharging the cells due to storage without a charge can cause permanent damage and void your 10-year battery warranty. The Canbat built-in BMS logs all activities performed on the battery including storage. Every charge and every discharge is recorded, along with various other factors, such as temperature. COLD WEATHER PERFORMANCE When discharging LiFePO4 batteries in extremely cold temperatures (less than 0 degrees Celcius), there is potential capacity loss. For example, a 12V 100Ah LiFePO4 battery may deliver only 90Ah, 80Ah, or even 70Ah in freezing temperatures, depending on how cold it is. This is natural for LiFePO4 chemistry and it’s only temporary. The full capacity will recover when the battery warms back up. At 0°C, a 12V 100Ah battery delivers about 80 amp-hours. At -20°C, the capacity that the battery can deliver drops to about 70 amp-hours. Charging LiFePO4 batteries in freezing temperatures can cause lithium plating, a dangerous phenomenon that can cause short-circuiting. This is why all Canbat LiFePO4 batteries have a built-in BMS which protects against cold weather charging. The BMS is also responsible for protecting against other factors including: High-temperature charging Overcharge Over-discharge Internal short circuits ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Jan
23
2022

The Best Golf Cart Batteries: Lithium Vs. Lead Acid

The golf cart market is evolving as more and more people are taking advantage of their versatile performance. For decades, deep-cycle flooded lead-acid batteries have been the most cost-effective means to power electric golf cars. With the rise of lithium batteries in many high-power applications, many are now looking into the advantages of LiFePO4 batteries in their golf cart. While any golf cart will help you get around the course or neighborhood, you need to make sure it has enough power for the job. This is where lithium golf cart batteries come into play. They're challenging the lead-acid battery market due to the many benefits that make them easier to maintain and more cost-effective in the long run. Below is our breakdown of the advantages of lithium golf cart batteries over lead-acid counterparts. Carrying Capacity Equipping a lithium battery into a golf cart enables the cart to significantly increase its weight-to-performance ratio. Lithium golf cart batteries are half the weight of a traditional lead-acid battery, which shaves off two-thirds of the battery weight a golf cart would normally operate with. The lighter weight means the golf cart can reach higher speeds with less effort and carry more weight without feeling sluggish to the occupants. The weight-to-performance ratio difference lets the lithium-powered cart carry an additional two average-sized adults and their equipment before reaching carrying capacity. Because lithium batteries maintain the same voltage outputs regardless of the battery’s charge, the cart continues to perform after its lead-acid counterpart has fallen behind the pack. In comparison, lead acid and Absorbent Glass Mat (AGM) batteries lose voltage output and performance after 70-75 percent of the rated battery capacity is used, which negatively affects carrying capacity and compounds the issue as the day wears on. No Maintenance One of the major benefits of lithium batteries is that they require no golf cart battery maintenance whatsoever, whereas lead-acid batteries regularly need to be checked and maintained. This ultimately results in saved man-hours and the extra costs of maintenance tools and products. The lack of lead-acid means that chemical spills are avoided and the chance of downtime on your golf car is drastically reduced. Battery Charging Speed Regardless if you’re using a lead-acid battery or a lithium battery, any electric car or golf cart faces the same flaw: they have to be charged. Charging takes time, and unless you happen to have a second cart at your disposal, that time can put you out of the game for a while. A good golf cart needs to maintain consistent power and speed on any course terrain. Lithium batteries can manage this without a problem, but a lead-acid battery will slow the cart down as its voltage dips. Plus after the charge has dissipated, it takes an average lead-acid battery roughly eight hours to recharge back to full. Whereas, lithium batteries can be recharged up to 80 percent capacity in about an hour, and reach full charge in less than three hours. Plus, partially-charged lead-acid batteries sustain sulfation damage, which results in significantly reduced life. On the other hand, lithium batteries have no adverse reaction to being less than fully charged, so it's okay to give the golf cart a pit-stop charge during lunch. Eco-Friendly Lithium batteries put less strain on the environment. They take significantly less time to fully charge, resulting in using less energy. They do not contain hazardous material, whereas lead-acid batteries, as the name suggests, contain lead which is harmful to the environment. Battery Cycle Life How long do golf cart batteries last? Lithium batteries last significantly longer than lead-acid batteries because the lithium chemistry increases the number of charge cycles. An average lithium battery can cycle between 2,000 and 5,000 times; whereas, an average lead-acid battery can last roughly 500 to 1,000 cycles. Although lithium batteries have a high upfront cost, compared to frequent lead-acid battery replacements, a lithium battery pays for itself over its lifetime. Not only does the investment in a lithium battery pay for itself over time, but big savings can be made in the way of reduced energy bills, maintenance costs, and possible repairs that would otherwise need to be made to heavy lead-acid golf cars. They also just perform better overall! Are Lithium Golf Cart Batteries Compatible? Golf carts designed for lead-acid batteries can see a significant performance boost with a lithium battery conversion. However, this second wind can come at an installation cost. Many lead-acid equipped golf carts need a retro-fit kit to operate with a lithium battery, and if the cart manufacturer doesn’t have a kit, then the cart will need modifications to operate with a lithium battery. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Jan
14
2022

Battery costs rise as lithium demand outstrips supply

The price of batteries looks set to rise in 2022 following a decade of sharp decline as supplies of lithium and other raw materials fail to keep up with ballooning demand. While mining companies scramble to increase production from existing facilities and develop new sources of supply, benchmark prices of lithium carbonate ended 2021 at records. In China, the biggest battery-producing country, the price was 261,500 yuan (just over $41,060) a ton, more than five times higher than last January. Other commodities used in cathodes, the most expensive part of a battery, have also been rising: The price of cobalt has doubled since last January to $70,208 a ton, while nickel jumped 15% to $20,045. The increases are undermining the technological and efficiency gains of recent years, when battery makers have worked hard together to develop long-life, high-performance batteries while trying to reduce costs. According to Bloomberg NEF, thanks to brisk sales in China. Further demand growth in 2022 will mean a lithium deficit this year as use of the material outstrips production and depletes stockpiles, according to a December report from S&P Global. The report said that according to S&P Global Market Intelligence, supply is forecast to jump to 636,000 metric tons of lithium carbonate equivalent in 2022, up from an estimated 497,000 in 2021 -- but demand will jump even higher to 641,000 tons, from an estimated 504,000. Gavin Montgomery, research director for battery raw materials at Wood Mackenzie, said lithium prices are unlikely to crash, as they did in previous cycles: "We're entering a sort of new era in terms of lithium pricing over the next few years because the growth will be so strong." In the short term, supplies will be limited. Producers in Australia closed down mines in 2020 after a period of low prices, and as COVID-19 lingers, it has proved difficult to rehire staffers and bring production back to pre-pandemic levels. Meanwhile, Chinese lithium-processing companies that make lithium carbonate were affected by restrictions on power use introduced suddenly in the autumn. Though some of those restrictions have eased, companies appear to be struggling to catch up. For cobalt, pandemic-induced transportation disruptions and border closures in Africa have been behind the soaring prices. The emergence of the omicron variant has added new disruptions in the main trade route from cobalt-producing Congo through the South African port of Durban to China. One lithium trader in Japan told Nikkei Asia they expect prices to remain at current high levels, saying, "Based on automakers' electric car targets, we doubt there is sufficient supply of raw material." New technologies such as all-solid-state batteries would need even greater amounts of lithium, the trader added. According to Bloomberg NEF, prices of lithium-ion battery packs were above $1,200 per kilowatt-hour in 2010 but plummeted to $132 by 2021. However, the company estimates that average prices could rise to $135 per kilowatt-hour in 2022. Cathode materials usually make up around 30% of the total cost of battery packs. The pressure is on to secure new supplies of raw materials Independent battery makers are racing to increase their sources of supply, including the likes of China's CATL, the world's biggest battery producer. China accounts for over 65% of global battery production and over half of lithium chemical production, a dominance that worries many in the car industry at a time of geopolitical tensions. "No country can compare to China in terms of cost competitiveness," said the Japanese lithium trader. "There are certainly geopolitical or China risks in the supply chain." Sanshiro Fukao, a senior fellow at the Itochu Research Institute, said carmakers see raw materials as "bargaining chips" in negotiations with battery makers, and failing to secure commodities would mean they would have no choice but to buy expensive batteries from them. In the global race to produce lower-cost electric vehicles, that could be fatal. Sourcing battery raw materials could soon prove as problematic for many carmakers as sourcing semiconductors has in the past year, Fukao said, and it is possible that carmakers may not be able to produce electric vehicles in the numbers planned due to shortages of materials. "Whether they can secure raw materials today determines if they can prevail 10 years from now," he said. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Jan
05
2022

HOW BATTERY ENERGY STORAGE SYSTEMS WORK WITH SOLAR

Solar power has become more affordable, accessible, and popular all over the world than ever before. At Lithium Valley Solar Systems, we are always looking for new innovative ideas and technologies that can help us solve problems for our customers. Battery energy storage is one of those technologies. What Are Battery Energy Storage Systems? Battery energy storage systems are rechargeable battery systems that store energy from the solar system and provide that energy to a home or business. Because of their advanced technology, battery energy storage systems store surplus energy produced by solar panels, power your home or business off-grid, and provide emergency backup power when needed. How Do They Work? Battery energy storage systems work by converting the DC energy being produced by your solar panels and storing it as AC power for later use. The higher your battery’s capacity, the larger the solar system it can charge. Ultimately, solar batteries do the following: Charge. During daylight, the battery storage system is charged by clean electricity generated by solar. Optimize. Intelligent battery software uses algorithms to coordinate solar production, usage history, utility rate structures, and weather patterns to optimize when the stored energy is used. Discharge. Energy is discharged from the battery storage system during times of high usage, reducing or eliminating costly demand charges. When you install a solar battery as part of your solar panel system, you can store excess solar electricity instead of sending it back to the grid. If the solar panels produce more electricity than what is being used or needed, the excess energy goes towards charging the battery. Electricity will only go back to the grid when your battery is fully charged, and electricity will only be drawn from the grid when the battery is depleted. What’s the Lifespan of Solar Batteries? The general range for a solar battery’s lifespan is between 5 and 15 years. However, proper maintenance can also have a major effect on your solar battery’s lifespan. Solar batteries are significantly impacted by temperature, so protecting your battery from extreme temperatures can increase its lifespan. What Are the Different Types of Solar Batteries? Batteries used in residential energy storage are typically made with one of the following chemical compositions: lead acid or lithium ion. Lithium ion batteries are often considered to be the best option for a solar panel system, though other battery types can be more affordable. Lead acid batteries have a relatively short life and lower depth of discharge (DoD)* than other battery types, and they are also one of the least expensive options currently on the market. For homeowners who want to go off-the-grid and need to install a lot of energy storage, lead acid can be a good option. Lithium ion batteries are lighter and more compact than lead acid batteries. They also have a higher DoD and longer lifespan when compared to lead acid batteries. However, lithium ion batteries are more expensive than their lead acid counterparts. *DoD indicates the percentage of the battery that has been discharged relative to the overall capacity of the battery. For example, if you have a Tesla Powerwall that holds 13.5 kilowatt-hours (kWh) of electricity, and you discharge 13 kWh, the DoD is approximately 96 percent. The more frequently a battery is charged and discharged, the shorter its lifespan will be. Many battery manufacturers specify a maximum recommended DoD for optimal performance. Powerwall and Battery Storage The powerwall is a solar storage battery that allows you to maintain a sustained power supply, day or night. On a typical day, Powerwall will meet all of your home’s energy needs. A self-powered home combines solar energy and Powerwall to independently power. Powerwall integrates with your solar system to store excess energy produced during the day and makes it available only when you need it. Not only is Powerwall weatherproof, but it’s also a completely automated system that requires no maintenance. Best of all, the Powerwall can detect power outages, disconnect from the grid, and automatically become your home’s main energy source. Powerwall is then able to offer your home seamless backup power in a fraction of a second; your lights and appliances will continue to run without interruption. Without Powerwall, solar will shut down during an outage. Through the Tesla appl, you will have full visibility into your self-powered home. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Dec
24
2021

Wish You a Merry Christmas and a Happy New Year!

Wish you have a excellent and happy holiday with your family and friends. May your New Year filled with warmth, peace and happiness.
Nov
25
2021

What is a solar generator?

A solar generator is a device—usually working alongside solar panels—that provides essential automatic backup power to your home when you need it the most, like during power outages. But it can be confusing because there isn’t just one type of generator. They range in type, style, brand, size, and function. Generators have a huge lineup that offers a wide range of coverage to suit your needs, so let’s talk about them and see if we can’t give you a little clarity about solar generators, how they differ from other generators, and some key information that may help you decide whether or not to buy a solar generator. What are the different types of generators? Good question. There are three main types of generators that we feel are the most prevalent to residential homes, and those are: Portable generators Inverter generators Standby generators What’s the difference between each type of generator? Portable generators are exactly what they sound like—a generator that’s portable, meaning one you can use on the go. Normally powered by gas, diesel, propane, or a hybrid of each, portable generators are basically made up of an engine, a fuel tank, and alternator. The benefit of a portable generator is that you can take it around with you when you need to power your electronic devices outside of your home (camping, tailgating, boating, or social distancing at a park). This doesn’t mean you can’t use a portable generator to backup power to your home—you can do whatever you want—it just means you can also use a portable generator for times when you’re not at home as well. If you do use it at home, the downside of the portable generator is that you have to manually turn it on when you need to use it, but that’s pretty easy to do. Inverter generators are similar to portable generators in their core components (engine, fuel tank, and alternator), except they are also connected to an inverter. Just like with a solar energy system, the inverter takes the DC current and changes it back to AC current. Inverter generators also have the benefit of generating more stable, cleaner energy, and (here’s the kicker) some are even portable. So, an inverter generator can also be a portable generator, but they’re usually meant to help you provide backup power to your home during times when you need it most, like when the power goes out. Standby generators are not portable. Usually, run on propane or natural gas, standby generators are installed outside of your home and will automatically kick on once your power goes out. When the power is back on, your standby generator will detect the reinitiated power and automatically return to standby mode until it detects the next power outage. Standby generators are more permanent and require a more complicated set up than an inverter generator or a portable generator, but having one means you don’t ever have to manually set up your generator to cover your power needs when an outage occurs. So, what is a solar generator? Solar generators are also portable but don’t include the moving components. They are essentially made up of an inverter, solar panels, a solar panel battery, and a battery charger. The solar panels on a solar generator capture energy from the sun and store that energy in a battery that is built into the generator. The inverter then takes that energy and converts it from DC power to AC power before releasing it. Once released, you can use the energy to power various household appliances and/or electronic devices when they need them most, such as during a power outage. ATTENTION：Pictures and articles are from the Internet, if there is any infringement, please contact us to delete it.
Oct
20
2021

What if the lithium battery catches fire？ Fire precautions for lithium batteries

According to the Local Fire Service of Australia (CFA), on July.30 2021 a fire broke out at an electrical storage facility in Moorabool, Australia, a 13-tonne Set of Tesla Megapack batteries caught fire and more than 30 fire engines arrived at the scene to take part in the operation, which took 150 firefighters four days to contain until August 3. Battery fire is an extreme safety accident, large to energy storage power station, small to electronic toys, battery fire is not necessarily the cause of the battery (core), may also be caused by electrical failure of the battery system. What if the battery catches fire? The cause of the fire in the lithium battery The essence of lithium battery fire is that the heat in the battery is not released according to the design intention, causing the internal and external combustion material to catch fire after ignition, the main causes are external short circuit, external high temperature and internal short circuit. 1, internal short circuit: due to the abuse of batteries, such as overcharged, battery production process dust and other long-term use of dust and dust to produce a micro-short circuit, the release of electrical energy led to temperature rise, temperature rise brought about by the material chemical reaction expanded the short circuit path, forming a larger short-circuit current, resulting in out-of-control heat fire. 2, external short circuit: take electric vehicle as an example, in the extreme case, short circuit point over the vehicle fuse, while the battery management system failure, a longer period of time external short circuit will generally lead to the connection weak point in the circuit burned, thus causing the external short circuit fire. 3, external high temperature: due to the characteristics of lithium battery structure, high temperature core internal material decomposition reaction, electrolyte decomposition will also react with positive and negative poles, core diaphragm will melt and decompose, a variety of reactions lead to a large amount of heat generation. The melting of the diaphragm causes the internal short circuit, the core explosion-proof film to rupture, the electrolyte ejection, resulting in burning fire. Lithium battery fire extinguishing procedures Analyzing the causes of battery fires, when lithium batteries need to be put out to fight fires, let's look at Tesla's recommendations: 1, if encountered a small fire, the flame did not spread to the high-pressure battery part, can use carbon dioxide or ABC dry powder fire extinguisher fire extinguisher. 2, in a thorough inspection of the fire, do not come into contact with any high-voltage components, always use insulation tools to check. 3, if the high voltage battery in the fire bending, twisting, damage, in short, become not like, or suspect that the battery problem. Then the water consumption when extinguishing the fire should not be too small, fire water should be sufficient. Battery fire may take 24 hours to completely extinguish. Using a thermal camera ensures that the high voltage battery is completely cooled before the accident is completely complete. If you do not have a thermal camera, you must monitor the battery for re-ignition. Smoke indicates that the battery is still hot and monitoring will remain in control until at least an hour after the battery is no longer smoking. According to the U.S. Fire Protection Agency, electric vehicles can catch fire "over 2,760 degrees Celsius" and "the use of water or foam can cause violent flames, as water molecules break down into explosive hydrogen and oxygen." So it's not safe to put out a small amount of water, and an electric car alone requires dozens of tons of water. Simply, lithium battery fire fighting uses a lot of water to cool the battery, it takes a long time and patience, cooling is the key. Electrical safety monitoring subsystem Energy storage systems and fire protection systems are not separate units, but should become a centralized and intelligent whole, improving the system flexibility and safety of fire protection systems is fundamental to ensuring the commercialization of energy storage systems. In the future, the new energy storage mode and fire protection plan will increase, and the energy storage fire protection system will gradually tend to be centralized and intelligent.