Battery capacity detection method

The invention discloses a battery capacity detection method comprising the following steps of: obtaining a charged open-circuit voltage OCV-state of charge SOC curve, and a direct-current inner resistance Romega; and calculating an SOC changing rate and the like. The method disclosed by the invention is mainly used for a battery and is particularly suitable for a capacity test of a power battery pack. Compared with the traditional full-charge and full-discharge test method, the test method disclosed by the invention realizes the aims of shortening battery capacity time and reducing test energy consumption.