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Maintenance of Your Lithium Battery Using LiFePO4

Views: 220     Author: Site Editor     Publish Time: 2023-08-01      Origin: Site


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Maintenance of Your Lithium Battery Using LiFePO4

LiFePO4 chemistry lithium batteries have been popular in recent years for a variety of applications since they are one of the most powerful and long-lasting battery chemistries available. They will last a decade or more if properly maintained. Please read these recommendations to guarantee that you get the most out of your battery investment.

Increased charging frequency and shallower cycling

If you prevent extremely deep discharges with lithium batteries, the battery will live longer. Except in circumstances, we recommend keeping to a maximum of 70-80% DoD (depth of discharge).

Prior to installation, clean the terminals.

The terminals on top of the battery are constructed of aluminum and copper, and when exposed to air, they will produce an oxide coating. Before connecting the battery connector and BMS module, properly clean the battery terminals using a wire brush to eliminate oxidation. If bare copper battery interconnects are utilized, these must be cleaned as well. The removal of the oxide layer improves conductivity and reduces heat buildup at the terminals. (In severe circumstances, heat accumulation on the terminals owing to inadequate conduction has been known to melt the plastic around the terminals and harm the BMS module!)

Lithium Ion Battery LiFePO4

Make use of the proper terminal mounting hardware.

Prior to installation, clean the terminals.

For batteries 90Ah and higher, use bolts 20 mm length. Bolts 15 mm in diameter for batteries 60Ah and less. If in doubt, measure the depth of the threads in the cell to ensure that the bolt is close to but not reaching the bottom of the hole. A spring washer, flat washer, and battery interconnects should be present from top to bottom.

Check that all terminal bolts are still snug about a week after installation. Loose terminal bolts can cause a high resistance connection, depriving your EV of power and generating excessive heat.

Never charge or discharge your batteries more than once!

Overcharging and overdischarging are the most prevalent reasons of LiFePO4 battery early failure. Even a single event might cause irreparable damage to the battery, voiding the warranty. To guarantee that no cell in your battery pack exceeds its nominal working voltage range, a battery protection system is necessary.

The absolute limit for each cell in LiFePO4 chemistry is 4.2V, although it is advised that you charge to 3.5-3.6V per cell, with less than 1% more capacity between 3.5V and 4.2V.

Overcharging will cause the battery to overheat, and prolonged or excessive charging may result in a fire.

As a result, overcharging may occur.

Incorrect battery protection system installation

Inadequate battery protection system

Failure of the battery protection system due to infection

Over-discharging, on the other hand, might cause battery damage. If any of the batteries is close to empty (less than 2.5V), the BMS must be unplugged from the load. Batteries below 2.0V may be somewhat damaged, although they are normally recoverable. A battery pushed to a negative voltage, on the other hand, will be irreparably ruined.

To prevent the total battery voltage from going below 11.5v without causing battery damage, utilize a low voltage cutoff instead of the BMS on 12v batteries. Charge the other end to no more than 14.2v, and no battery should be overcharged.

As a result, overcharging may occur.

Incorrect battery protection system installation

Swelling only occurs when a cell is over-discharged or, in some cases, over-charged. Swelling does not necessarily mean that the battery is no longer usable, although it may lose some capacity as a result.

We have a number of lithium battery PACK production lines, aging, capacity division and other production equipment and a large number of experienced industrial workers.


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