What are the reasons why the BYD Qin cannot charge?

[KiaraAnn]

Here are the specific reasons why the BYD Qin cannot charge: 1. Check whether the connection of the charging cable circuit is secure, whether the connection between the wire and the plug is intact, and carefully observe whether there are signs of sparking or burning at the socket and plug, as well as any line damage or breakage. 2. Check whether the charger is damaged and whether the charging parameters meet the requirements, i.e., the initial charging current reaches 1.6~2.5A/cell; the maximum charging voltage reaches 14.8~14.9V/cell. 3. Check whether the battery is dry, i.e., whether the battery is severely low on electrolyte. 4. Check whether the battery plates have irreversible sulfation. The irreversible sulfation of the plates can be determined by measuring the change in terminal voltage during charging and discharging. During charging, the battery voltage rises very quickly, and the battery does not hold charge or holds very little charge.