CHARGING CURRENT TESTING METHOD AND APPARATUS, AND CHARGING TESTING SYSTEM

This application provides a charge current test method and device, and a charge test system. The method includes: charging a to-be-tested battery at a first current under a first temperature until a voltage of the to-be-tested battery reaches a preset cutoff voltage, stopping charging whenever an increment of a state-of-charge value of the to-be-tested battery reaches a preset value during the charging of the to-be-tested battery, and continuing to charge after a duration of stopping charging reaches a first preset time length; calculating an impedance of the to-be-tested battery during the first preset time length; and determining, based on the impedance, a maximum state-of-charge value that is allowed to be reached when the charging is performed at the first current under the first temperature. Compared with the prior art, the foregoing solution enables direct test of most commercial batteries on the market without a need to manufacture a special-purpose three-electrode battery. In addition, the solution takes temperature into account, thereby improving accuracy of test results.