Lithium ion battery gas and optical detector

A gas and flame detection system for a battery pack, the flame detection system comprising:

• a battery pack comprising a plurality of cells;
• a controller;
• a first gas detector in communication with the battery pack and configured to sense a concentration value of one or more gases, wherein:
• the first gas detector is electrically connected to the controller;
• the first gas detector is configured to generate a gas alarm level return signal indicative of no alarm, a first alarm, or a second alarm based upon the concentration value of the one or more gases;
• the first gas detector is configured to transmit the gas alarm level return signal to the controller;
• the controller is configured to output no alarm, the first alarm, or the second alarm based upon the gas alarm level return signal received from the first detector;
• an infrared detector in communication with the battery pack and configured to sense a level of infrared radiation, wherein:
• the infrared detector is electrically connected to the controller;
• the infrared detector is configured to generate an infrared alarm level return signal indicative of no alarm or a third alarm based upon the level of infrared radiation;
• the infrared detector is configured to transmit the infrared alarm level return signal to the controller;
• and
• the controller is configured to output no alarm or the third alarm based upon the infrared alarm level return signal.