Multi-module battery system testing

A battery management system for testing a battery system that includes a plurality of battery modules, the battery management system comprising:

• a controller device;
• and
• a plurality of module interface devices operatively coupled to the controller device in which each module interface device includes a measurement circuit and a switching circuit, wherein for each battery module of the plurality of battery modules, a respective module interface device of the plurality of module interface devices is configured to be operatively coupled to anode and cathode terminals of that battery module;
• wherein the controller device is configured to perform a test process with respect to the battery system that includes:
• independently disconnecting each battery module of the plurality of battery modules from a connected state to a disconnected state with respect to an electrical load via the switching circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module;
• for each battery module of the plurality of battery modules, independently connecting that battery module from the disconnected state to the connected state with respect to the electrical load via the switching circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module while remaining battery modules of the plurality of battery modules are in the disconnected state;
• for each battery module of the plurality of battery modules, independently measuring a module-specific operating condition of that battery module via the measurement circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module to obtain a module-specific measurement while the remaining battery modules are in the disconnected state;
• for each battery module of the plurality of battery modules of the battery system, measuring a load-specific operating condition across the electrical load to obtain a load-specific measurement while that battery module is in the connected state and the remaining battery modules are in the disconnected state;
• and
• outputting a set of test results that includes or is based on the module-specific measurement and the load-specific measurement for each battery module of the plurality of battery modules obtained while that battery module is in the connected state and the remaining battery modules are in the disconnected state.

An article of manufacture for testing a battery system that includes a plurality of battery modules, the article of manufacture comprising:

• a data storage machine having instructions stored thereon executable by a logic machine to:
• perform a test process with respect to the battery system via a battery management system that includes a plurality of module interface devices;
• wherein for each battery module of the plurality of battery modules, a respective module interface device of the plurality of module interface devices is operatively coupled to anode and cathode terminals of that battery module;
• wherein the test process includes:
• independently disconnecting each battery module of the plurality of battery modules from a connected state to a disconnected state with respect to an electrical load via a switching circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module;
• for each battery module of the plurality of battery modules, independently connecting that battery module from the disconnected state to the connected state with respect to the electrical load via the switching circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module while remaining battery modules of the plurality of battery modules are in the disconnected state;
• for each battery module of the plurality of battery modules, independently measuring a module-specific operating condition of that battery module in the connected state via a measurement circuit of the module interface device that is operatively coupled to the cathode and anode terminals of that battery module to obtain a module-specific measurement while the remaining battery modules are in the disconnected state;
• for each battery module of the plurality of battery modules of the battery system, measuring a load-specific operating condition across the electrical load to obtain a load-specific measurement while that battery module is in the connected state and the remaining battery modules are in the disconnected state;
• and
• outputting a set of test results that includes or is based on the module-specific measurement and the load-specific measurement for each battery module of the plurality of battery modules obtained while that battery module is in the connected state and the remaining battery modules are in the disconnected state.