How to store LIFEPO4 12v batteries

How to store my lithium battery? We receive the most problems, especially in winter. The answer depends on the temperature and time you store the battery.

Some people use LiFePO4 12v batteries seasonally, such as when camping in summer or traveling to unknown places in winter. It is common for some people to store lithium batteries during the off-season. When storing lithium iron phosphate batteries, it is important to store them properly to ensure that they are not damaged and maintain their best performance for many years to come. Whether you are a full time Vanlifer or a Weekend Warrior, keeping your batteries healthy is key to not having issues on the road with electrical.

How to store LIFEPO4 batteries?

How to store my lithium battery? We receive the most problems, especially in winter. The answer depends on the temperature and time you store the battery. The following is a summary of how to store LiFePO4 12v batteries:

• Recommended storage temperature: -5 to +35°C (23 to 95°F)

• Storage for up to 1 month: -20 to +60°C (4 to 140°F)

• Storage for up to 3 months: -10 to +35°C (14 to 95°F)

• Extended storage time: +15 to +35°C (59 to 95°F)

It is strongly recommended to store lithium batteries indoors during the off-season. It is also recommended to store LiFePO4 batteries at a state of charge (SOC) of approximately 50% or higher. If the battery is stored for a long time, cycle the battery at least once every 6 months. Do not store discharged batteries.

Disconnect before storing LIFEPO4

Many customers have a main switch to disconnect the battery power. We recommend that you take additional measures to ensure that the battery is truly disconnected. This is because many Camper vans still have components running in the background, such as carbon dioxide sensors, backlit stereos, or other emergency sensors that may bypass the main disconnect switch. The best way to store the battery is to physically disconnect the main positive and negative wires from the lithium battery. This will ensure that the batteries will not discharge during storage, and when you use LiFePO4 12v batteries again, they will have enough power in them. Make sure you always use lithium chargers, not chargers for other chemical batteries.

LiFePO4 batteries have a low self-discharge rate of 2% per month. This means that when lithium batteries are stored, they lose 2% of their charging capacity every month. To prevent a higher discharge rate, we recommend disconnecting all power from the battery. When you store LiFePO4 batteries, it is important to store them with a state of charge (SOC) of 50% or higher. When storing for a long time, it is recommended to use a higher charge state. If you want the batteries to maintain a good charge after the storage period is over, you should charge them to 100% and store them in a fully charged state.

How to use system storage LIFEPO4

If you store the LiFePO4 battery with the entire system; for example, your charger and inverter, we recommend using a battery protector. Once the voltage reaches 11.5V, it will disconnect the LiFePO4 battery from the parasitic load, thereby protecting LiFePO4 Battery. If you have not installed a disconnect switch, it is recommended that you remove the main battery connection. Since LiFePO4 batteries do not require trickle charging, it is possible to disconnect the charger when storing the battery.

How to store LIFEPO4 in cold weather

If the battery pack is not used, the lithium battery is not affected by extreme temperatures. We do not recommend storing lithium batteries in extremely cold temperatures for a long time, as this may cause the ABS casing of the battery pack to crack. In addition, high temperatures exceeding 60°C (140°F) may damage other components in the battery pack, so it is 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 the battery before storage

If you store the LiFePO4 battery without charging, it will have major consequences. Due to the 2% self-discharge rate, the battery may be over-discharged. The discharge level may be lower than the level that the BMS can protect. This is why it is very important to charge the lithium battery before storing it. It is strongly recommended that you also store the lithium battery at room temperature, especially when it is stored for a long time. Review the first paragraph of this article to understand how long you can store LiFePO4 in different temperature ranges. Excessive discharge of the battery due to storage uncharged can cause permanent damage and void battery warranty.

Cold weather performance

When discharging LiFePO4 batteries at extremely cold temperatures (below 0 degrees Celsius), capacity loss may occur. For example, a 12V 100Ah LiFePO4 battery may only provide 90Ah, 80Ah or even 70Ah at freezing temperatures, depending on how cold it is. This is natural to LiFePO4 chemistry and only temporary. When the battery warms up, the full capacity will be restored. At 0°C, the CLI100-12 battery (12V 100Ah) can provide about 80 ampere hours of current. At -20°C, the available capacity of the battery drops to approximately 70 ampere hours. Charging LiFePO4 batteries at freezing temperatures will cause lithium plating, which is a dangerous phenomenon that may cause a short circuit. This is why all Maxworld Power LiFePO4 batteries have a built-in BMS to prevent charging in cold weather. The BMS is also responsible for preventing other factors, including:

• High temperature charging

• Overcharge

• Overdischarge

• Internal short circuit

Cold weather lithium battery

If you don’t want to face potential capacity loss in freezing temperatures and want to be able to charge LiFePO4 batteries in cold weather, please check out our low-temperature lithium batteries. They have a cold weather rating and are designed for the cold climate of Canada. The battery can be safely charged and discharged at temperatures as low as -20°C (-4°F).

How? The Maxworld LiFePO4 12v battery has a built-in heating system that uses proprietary technology to obtain power from the charger itself. No additional components are required. The entire heating and charging process is completely seamless. Once you try to charge below 0°C, the heating system will automatically activate and automatically deactivate when it is no longer needed. The heating system does not take electricity from the battery, but from the charger to ensure that the battery does not discharge by itself. Just insert the battery into the lithium charger, the internal heating and monitoring system can complete the rest.

Discharging LiFePO4 at low temperatures will reduce the efficiency in terms of battery output capacity. Our proprietary technology solves this problem. When discharging lithium at freezing temperatures, the heater draws energy from the battery to activate and heat the battery to ensure maximum capacity. The maximum discharge rating of Maxworld LiFePO4 is not affected by temperature.

In cold weather, up to 4 units of lithium batteries can be connected in series or in parallel. Series connection will increase the voltage, while parallel connection will increase the amperage.

All in all, to store the LiFePO4 12v batteries depends on the temperature and time you store the batteries. Good storing lithium iron phosphate batteries to ensure that they are not damaged and maintain their best performance, the battery can be more durable. Keep your Batteries ready for your next Campervan excursion!

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