Switchable Battery Management System

A battery system comprising:

• a plurality of battery modules arranged in series to define a battery string, each of the plurality of battery modules comprising a supervisory circuit, one or more cell packs, and one or more switches to electrically connect the one or more cell packs to the battery string;
• and
• a battery management system to selectively switch, for each of the plurality of battery modules, the one or more switches between a first position that electrically places the one or more cell packs in series with the battery string and a second position that electrically bypasses the one or more cell packs from the battery string, wherein the battery management system is configured to electrically couple the battery string with a battery bus via a string switch, and
• wherein the battery management system is configured to:
• identify a first battery module from the plurality of battery modules to bypass from the battery string,
• identify a second battery module from the plurality of battery modules to place in series with the battery string,
• switch the one or more switches of the first battery module to the second position, and
• switch the one or more switches of the second battery module to the first position.

A battery system comprising:

• a first plurality of battery modules arranged in series to define a first battery string having an first output voltage;
• a second plurality of battery modules arranged to define a second battery string defining a second output voltage, wherein the second battery string is arranged electrically in parallel to the first battery string via a second string switch,
• wherein each of the first and second pluralities of battery modules comprises a supervisory circuit, one or more cell packs, and one or more switches to electrically connect the one or more cell packs to its respective first or second battery string;
• and
• a battery management system to selectively switch, for each of the plurality of battery modules, the one or more switches between a first position that electrically places the one or more cell packs in series with its respective first or second battery string and a second position that electrically bypasses the one or more cell packs from the its respective first or second battery string,
• wherein the battery management system is configured to:
• identify a first battery module from the first plurality of battery modules to bypass from the first battery string,
• identify a second battery module from the first plurality of battery modules to place in series with the first battery string,
• switch the one or more switches of the first battery module to the second position, and
• switch the one or more switches of the second battery module to the first position.