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US 6,475,662 B1Granted
Thermal battery
AssigneeEagle-Picher Technologies, LLC
InventorRichard D. Spencer
Life of this patent
Estimating the term…
Abstract
An improved thermal battery with improved operating efficiency. The thermal battery utilizes both a first activatible heat source and a second independently activatible heat source. The second heat source is optionally activated under storage environment conditions, such as low temperature, which thereby allow battery operation of improved efficiency.
Claims9
A thermal battery comprising:
- at least one cell including a cathode, a node, and heat activatible electrolyte;
- a first pyrotechnic heat source;
- a second independently activatible pyrotechnic heat source;
- and
- a control device which monitors thermal battery storage temperature and activates said first pyrotechnic heat source when said storage temperature is within a first range, and activates both said first and second pyrotechnic heat sources when said storage temperature is within a second range.
2 more elements
A thermal battery comprising:
- at least one cell including a cathode, anode, and heat-activatible electrolyte;
- a first pyrotechnic heat source;
- and
- a second independently activatible pyrotechnic heat source, wherein said second pyrotechnic heat source is a different type and sensitivity than said first pyrotechnic heat source.
1 more element
A method of supplying heat to a thermal battery to activate the electrolyte in the thermal battery, comprising:
- activating a first pyrotechnic heat source in thermal contact with said thermal battery in response to a signal for initiating operation of said thermal battery;
- measuring a temperature of a storage environment of said thermal battery;
- comparing said temperature to a predetermined minimum temperature;
- and
- activating a second pyrotechnic heat source in thermal contact with said thermal battery when said temperature is less than said predetermined minimum temperature.
2 more elements
Dependencies are inferred from the claim text.