Passive thermal management system for battery

A battery powered vehicle comprising:

• a first electric motor;
• and
• a battery operatively coupled with the first electric motor, the battery comprising:
• a thermally conductive housing;
• a first battery cell enclosed within the thermally conductive housing;
• and
• a laminated element enclosed within the thermally conductive housing, the laminated element being in contact with the first battery cell and the thermally conductive housing, the laminated element including one or more heat conducting layers and one or more intumescent layers, the laminated element being configured to conduct heat generated by the first battery cell from the first battery cell to the thermally conductive housing during normal operational conditions of the first battery cell, a local portion of the laminated element adjacent to where the laminated element contacts the first battery cell being configured to reconfigure into a non-heat conducting configuration when the first battery cell experiences a thermal runaway condition.

A portable electronic device comprising:

• one or more electrically powered components;
• and
• a battery operatively coupled with the one or more electrically powered components, the battery comprising:
• a thermally conductive housing;
• a first battery cell enclosed within the thermally conductive housing;
• and
• a laminated element enclosed within the thermally conductive housing, the laminated element being in contact with the first battery cell and the thermally conductive housing, the laminated element including one or more heat conducting layers and one or more intumescent layers, the laminated element being configured to conduct heat generated by the first battery cell from the first battery cell to the thermally conductive housing during normal operational conditions of the first battery cell, a local portion of the laminated element adjacent to where the laminated element contacts the first battery cell being configured to reconfigure into a non-heat conducting configuration when the first battery cell experiences a thermal runaway condition.