Embodiments of the present application disclose a battery repair method and apparatus, and relate to the battery field, so as to improve a battery repair effect. The method includes: 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, where the abuse record includes a usage record of a situation in which a preset usage range of the performance parameter of the battery is exceeded, 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; and repairing, by the power system, the battery according to a selected power repair policy. According to the method, a failing battery can be repaired.