How to activate the lithium battery after it has not been used for a long time?

Many people put the lithium battery on the electric bicycle when they don't use it for a long time, and the air switch is not turned off. When I used the electric bike again a few months later, I found that the car had no power and could not be charged. After the charger is plugged in, the green light will always be displayed, even if the charger is plugged in for 24 hours, it will still be green. This is because the voltage of the lithium battery is too low, and the difference between the voltage and the output voltage of the charger is too large, so the charger cannot charge the lithium battery.

For this kind of lithium battery, we have four good ways to save most of the low voltage lithium batteries. Note that most of them are not 100%.

1. Series method. Connect another 12-volt battery with normal voltage in series on the whole battery. For example, if the original car is a 48V-20AH battery, we will connect another 12V-20AH battery in series. The voltage of a 12V battery with sufficient power is about 13V. After being connected in series, the voltage of the whole battery can be increased, and then the original charger can be used for charging. In this way, the battery can be charged. After the charger is plugged in, the charger is red, and then the battery can be charged. When the charger turns to green, remove the battery connected in series. Then charge it normally.
2. Parallel connection method. This method is a little troublesome. For example, the electric bicycle was originally a 48V-20AH battery. We have another set of 48V-20AH batteries in parallel. As we all know, the voltage of the parallel circuit is equal everywhere, and the high voltage end will flow into the low voltage end. This method is also used by many battery dealers to detect batteries that have no electricity at all. Then charging can also achieve the purpose of charging. This principle is similar to that of connecting a battery in series. It also increases the voltage of the whole group.
3. Low voltage charging method. Use a smaller charger for charging. For example, if it is a set of 60V-20AH batteries, we will charge it with a 48V-20AH charger. In most cases, it can also be filled. The principle is similar to the first one, which is to make the charging voltage closer to the voltage at both ends of the battery.
4. Single battery charging method. The battery can be activated by charging a single battery with a 12-volt motorcycle charger, but this charging is relatively slow. Generally, it takes more than 7 hours to charge, and the battery voltage will slowly rise to about 12V.

This operation will save a lot of money for replacing a new battery. However, it is recommended that users of lithium batteries for electric bicycles take out lifepo4 battery for storage when they do not use electric bicycles for a long time, which will not affect the service life of lithium batteries and will not cause lithium battery failure.

A professional and reliable shopping center providing LiFePO4 battery, Winston battery, Calb, Sinopoly Battery, Headway Battery and shipping them globally.