Battery electrolyte leakage detection device and detection method

The invention provides a battery electrolyte leakage detection device and method, and the device comprises a detection cavity which is provided with an air inlet hole and an air outlet hole; the reflecting mirror is arranged in the detection cavity; the infrared light source and the infrared detector are arranged in the detection cavity, light emitted by the infrared light source is reflected to the infrared detector through the reflector and is received by the infrared detector, and a light filter is arranged at the infrared light receiving end of the infrared detector; the filter amplifier is connected with the infrared detector; and the controller is connected with the infrared light source and the filter amplifier. According to the detection method, when an infrared beam penetrates through a light absorption substance, infrared light with the specific wavelength is selectively absorbed by the light absorption substance, and the substance concentration is determined by measuring the attenuation amount of t