Systems and methods for thermal management of an energy storage system

A method for thermal management performed by a controller of an energy storage system, the energy storage system including at least a first battery module, one or more second battery modules, a first battery management system (BMS) node, and one or more second BMS nodes, the first BMS node being configured to control operation of the first battery module, each second BMS node being configured to control operation of a respective one of the one or more second battery modules, the first battery module being thermally coupled with the one or more second battery modules, the method comprising:

• determining a temperature profile difference of the first battery module, the temperature profile difference of the first battery module representing a difference between an actual temperature profile of the first battery module and a desired temperature profile of the first battery module;
• determining an operation adjustment representing a desired change in operation of the one or more second battery modules to change an amount of heat generated by the one or more second battery modules that flows to the first battery module, for decreasing the temperature profile difference of the first battery module;
• and
• controlling the one or more second BMS nodes to change operation of the one or more second battery modules according to the operation adjustment.

A method for thermal management performed by a controller of an energy storage system, the energy storage system including a least a first battery module and a second battery module, the method comprising:

• determining that the first battery module is operating in a bypass operating mode;
• and
• in response to determining that the first battery module is operating in the bypass operating mode;
• determining a desired temperature profile of the first battery module that represents a desired temperature of the first battery module over a duration of time, the desired temperature profile including at least one of:
• (i) a diagnostic temperature profile that is appropriate for the first battery module while performing an in-situ test on the first battery module, and
• (ii) a soaking temperature profile for maintaining a temperature of the first battery module while the first battery module is at rest, for at least one of (a) preparing the first battery module for an in-situ test and (b) achieving a desired electrochemical response of the first battery module, and
• controlling temperature of an environment of the first battery module at least partially based on the desired temperature profile of the first battery module.