Lithium is a metal element and its chemical symbol is Li (lithium). In addition to applications in the nuclear energy industry, it can also manufacture special alloys, special glass (glass for TV screens) and lithium ion batteries. In lithium ion batteries, lithium is used as the anode of the battery.

　　Lithium-ion batteries are also divided into two categories: non-rechargeable batteries and rechargeable batteries. Non-rechargeable batteries are called disposable batteries. Only chemical energy can be converted into electrical energy at a time, and electrical energy cannot be reduced to chemical energy (or the reduction performance is poor). Rechargeable batteries are called secondary batteries. It can convert electrical energy into chemical energy and store it. When used, the conversion of chemical energy into electrical energy is reversible, which is an important feature of electrochemical lithium-ion batteries

　　1. DC charging failure; GB/T27930-2015 charging failed to start, jump gun after charging, SOC no longer charge.

　　cause of issue:

　　Battery failure (voltage, temperature, insulation abnormality, etc.)

　　(2) BMU failure (abnormal charging module or charging tank)

　　Main negative pole, abnormal charging relay

　　(4) The resistance of CC1 to ground, the voltage of CC2 to ground is abnormal

　　(5) PE abnormal

　　treatment:

　　Solve the battery

　　Repair/replace faulty parts

　　Intercept charging information and analyze the cause of the failure.

　　2. AC charging failure;

　　cause of issue:

　　Battery failure (voltage, temperature, insulation abnormality, etc.)

　　(2) BMU failure (abnormal charging module or charging tank)

　　Main negative pole, abnormal charging relay

　　(4) CC to ground resistance, CP to ground voltage is abnormal

　　(5) Sports exception

　　treatment:

　　Solve the battery

　　Repair/replace faulty parts

　　Intercept charging information and analyze the cause of the failure.