Self-heating battery that automatically adjusts its heat setting
First Claim
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1. A self-heating battery comprising:
- a battery;
a heating element operatively connected to the battery for heating the battery;
a temperature sensor for determining the temperature of the battery;
a switch operatively connected to said heating element and temperature sensor and responsive to said temperature sensor for switching on the heating element and raising the temperature of the battery to allow the battery to deliver its rated capacity when a sensed temperature of the battery is below a temperature where available battery capacity is limited; and
a load sensing circuit operative with the switch for sensing load demand and activating low and high heat modes based on load demand.
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Abstract
A self-heating battery includes a battery, heating element operatively connected to the battery for heating the battery and a temperature sensor for determining the temperature of the battery. A switch is operatively connected to the heating element and temperature sensor and responsive to the temperature sensor for switching on the heating element and raising the temperature of the battery to allow the battery to deliver its rated capacity when a sensed temperature of the battery is below a temperature where available battery capacity is limited. A load sensing circuit is operative with the switch for sensing load demand and activating low or high heat modes.
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Citations
24 Claims
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1. A self-heating battery comprising:
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a battery;
a heating element operatively connected to the battery for heating the battery;
a temperature sensor for determining the temperature of the battery;
a switch operatively connected to said heating element and temperature sensor and responsive to said temperature sensor for switching on the heating element and raising the temperature of the battery to allow the battery to deliver its rated capacity when a sensed temperature of the battery is below a temperature where available battery capacity is limited; and
a load sensing circuit operative with the switch for sensing load demand and activating low and high heat modes based on load demand. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A self-heating battery comprising:
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a battery;
a heating element operatively connected to the battery for heating the battery;
a temperature sensor for determining the temperature of the battery;
a switch operatively connected to said heating element and temperature sensor and responsive to said temperature sensor for switching on the heating element and raising the temperature of the battery to allow the battery to deliver its rated capacity when a sensed temperature of the battery is below a temperature where available battery capacity is limited; and
a load sensing circuit operative with the switch for sensing load demand and setting the battery heating based on the load demand in a low or high power heat mode, and comprising a low current load sensing switch and high current load sensing switch operative with the switch connected to said heating element, a load current sensor, a low current comparator operatively connected to said low current load sensing switch and load current sensor, and a high current comparator operatively connected to said high current load sensing switch and load current sensor, such that said comparators determine low and high power loads, and a timer circuit operative with the low and high current load sensing switches and comparators such that after a predetermined time period, a low heat mode is activated based on sensed loads. - View Dependent Claims (15, 16, 17, 18, 19, 20, 21, 22, 23, 24)
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Specification