A battery repair method, comprising: determining, by a power system, a failure mode of a battery according to an abuse record of the battery or a performance parameter of the battery, wherein the abuse record comprises a usage record of a situation in which a value of the performance parameter beyond a preset usage range of the performance parameter of the battery is used, and the performance parameter of the battery is used to represent performance of the battery; determining, by the power system according to the failure mode of the battery, a power repair policy for repairing the battery, wherein when the failure mode of the battery is at least one of a water loss mode, a grid corrosion mode, or a thermal runaway mode, the power repair policy is: reducing a float charging voltage of the battery to charge the battery or reducing an equalized charging voltage to charge the battery or starting intermittent charging to charge the battery, and enhancing refrigeration of the battery, and when the failure mode of the battery is at least one of an internal short-circuit mode, a weak battery mode, or a sulphation mode, the power repair policy is: when the battery is in a fully charged state, using a preset voltage and a preset current to charge the battery for a first preset time length, and enabling a temperature of the battery to be less than or equal to a first preset threshold, wherein the preset voltage is greater than or equal to a standard charging voltage of the battery, and the preset current is greater than or equal to a standard charging current of the battery; and repairing, by the power system, the battery according to a selected power repair policy. determining, by a power system, a failure mode of a battery according to an abuse record of the battery or a performance parameter of the battery, wherein the abuse record comprises a usage record of a situation in which a value of the performance parameter beyond a preset usage range of the performance parameter of the battery is used, and the performance parameter of the battery is used to represent performance of the battery; determining, by the power system according to the failure mode of the battery, a power repair policy for repairing the battery, wherein when the failure mode of the battery is at least one of a water loss mode, a grid corrosion mode, or a thermal runaway mode, the power repair policy is: reducing a float charging voltage of the battery to charge the battery or reducing an equalized charging voltage to charge the battery or starting intermittent charging to charge the battery, and enhancing refrigeration of the battery, and when the failure mode of the battery is at least one of an internal short-circuit mode, a weak battery mode, or a sulphation mode, the power repair policy is: when the battery is in a fully charged state, using a preset voltage and a preset current to charge the battery for a first preset time length, and enabling a temperature of the battery to be less than or equal to a first preset threshold, wherein the preset voltage is greater than or equal to a standard charging voltage of the battery, and the preset current is greater than or equal to a standard charging current of the battery; and repairing, by the power system, the battery according to a selected power repair policy.