Ducted gas detector

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

• a battery pack comprising a plurality of cells, wherein the battery pack comprises a first battery gas port and a second battery gas port;
• a controller;
• a first detector in communication with the battery pack and configured to sense a concentration value of one or more gases, wherein:
• the first detector is electrically connected to the controller;
• the first detector is configured to generate an 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 detector is configured to transmit the alarm level return signal to the controller;
• the controller outputs a first alarm, or a second alarm based upon the alarm level return signal received from the first detector;
• and
• the first detector is mounted external to the battery pack;
• a first tube connected between the first battery gas port to the first detector, wherein the first tube contains a fan configured to push airflow from the first battery gas port to the detector;
• and
• a second tube connected from the second battery gas port to the first detector, wherein airflow travels from the first detector, through the second tube, and back to the battery pack via the second battery gas port;