A battery consistency detection and classification method and apparatus, relating to battery detection methods and apparatuses. The detection apparatus comprises an infrared thermal imager and a control cabinet. The infrared thermal imager is placed above the control cabinet. The infrared thermal imager receives infrared rays reflected by a detected object, converts the infrared rays into a corresponding gray scale, and acquires a temperature and a thermal image of the object according to the value of the gray scale. The control cabinet comprises a control unit and a battery placement unit. The battery placement unit is connected to the control unit by using a wire. The control unit comprises an electronic load, a charger, a microcontroller, and a multiplexer. The charger and the electronic load have multiple channels. The microcontroller is sequentially connected to the electronic load, the charger, and the multiplexer. The multiplexer is sequentially connected to the electronic load and the charger. By mean
