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1、 Lithium ion batteries cannot be charged

There are several reasons why lithium-ion batteries in electric vehicles cannot be charged: the charger is reversed or the charger is faulty; Protection board protection not restored or protection board failure; Short circuit between battery pack and external electrical appliances.

When solving the above problems, search in order: whether the charger is connected in reverse, whether the positive and negative plugs of the battery pack are connected in reverse; Restart the electrical appliances to release the protection of the protection board, and measure whether the MOS transistor on the protection board has a driving voltage; Check for loose or disconnected wiring connections.

2、 Lithium ion batteries cannot discharge

There are several reasons why lithium-ion batteries in electric vehicles cannot discharge properly during use: low voltage protection board or controller protection for lithium-ion batteries; Damaged protective board or controller; Reverse connection of positive and negative electrodes during discharge; The circuit is disconnected or the switch is not turned on.

To solve the above problems, you can take measures such as charging lithium-ion batteries, searching for protective boards or wiring connections.

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