Battery protection systems

A system for a vehicle having an air conditioning, AC, system with a first AC line, a second AC line, a first communication link, and a second communication link, the AC system being in fluid communication with the vehicle through a second air conditioning line and in electrical communication with the vehicle, the system comprising:

• a thermal management system, the thermal management system comprising:
• a battery that is in communication with the vehicle, in fluid communication with the AC system through the first AC line, and in electrical communication with the AC system through the first communication link;
• a fan that is proximate the battery and in fluid communication with the battery;
• a BMS comprising a first sensor configured to measure a first temperature of the battery and a second sensor configured to measure a second temperature of the vehicle, the BMS being in communication with the AC system and the fan;
• and
• a device in communication with the BMS, the first sensor and the second sensor, the device being configured to:
• determine, via the first sensor, a first temperature parameter of the battery based on the first temperature;
• determine, via the second sensor, a second temperature parameter of the vehicle based on the second temperature;
• and
• perform thermal management of the battery at least by causing the AC system and the fan to one or both of cool and heat battery based on one or both of the first temperature parameter and the second temperature parameter.