The main reason why electric vehicle lithium-ion battery packs cannot be charged
1. Check if the circuit connections are secure and whether chargers are being used interchangeably.
When charging the lithium-ion battery pack of an electric vehicle, check that the socket and charging cable are working properly to prevent charging failure due to a malfunctioning or loose socket. Use the charger that is compatible with your electric vehicle to avoid using chargers from other vehicle models or types, which may result in ineffective charging.
2. The battery is severely bulging, causing the electric vehicle to fail to charge.
First, measure the bulging battery to check if it can still be used. How to repair it? Open the battery compartment and open the sealed filler cap on the battery (do not lose the rubber cap on the filler cap). Observe if there is still liquid. Use a syringe to draw 5 to 10 ml of distilled water and add it to the filler hole, adding gradually until the liquid just covers the electrode plates. It is better if there is a water level indicator on the outside.
3. The lithium-ion battery pack has been stored for too long, resulting in a low voltage and preventing the charger from charging it.
Lithium-ion battery packs in electric vehicles can suffer significant damage if left unused for extended periods. Common issues include the battery entering a dormant state and becoming unusable, or, more seriously, the battery fluid drying out. In such cases, the simplest solution is to try charging with a lower-powered charger first, and then switch to the original charger once the voltage has increased.
4. Problems with the battery charging IC or BMS system.
Problems with the lithium-ion battery management system can occur due to factors such as cell imbalance, leading to misjudgments by the management IC and its inability to detect voltage or current.
