A method, device and system is disclosed for rapidly and safely discharging remaining
energy stored in an electrochemical battery 104 in the event of an internal
short circuit or other fault. In its best mode of implementation, if a sensor 116
detects one or more parameters such as battery temperature 204 or pressure
206, exceeding a predetermined threshold value 334, the terminals
144 of the battery or cell are intentionally short-circuited external to
the battery through a low or near zero resistance load 150 which rapidly
drains energy from the battery 104. Heat generated by such rapid drain is
absorbed by a heat absorbing material 151 such as an endothermic phase-change
material like paraffin. The rate energy is drained via the external discharge load
150 may be controlled with an electronic circuit 136 responsive to
factors such as state of charge and battery temperature. Devices such as inductive
charging coils 160, piezoelectric and Peltier devices 300, may also
be used as emergency energy discharge loads. Heat absorption material 163 may
be used to protect adjacent issue in medically-implanted devices.
