Method for reducing conductive and convective heat loss from the battery in an RFID tag or other battery-powered devices
First Claim
1. A battery powered unit comprising an integrated circuit (IC) and a battery for powering said IC wherein said IC and said battery are enclosed in a low thermally conductive material having a thermal conductivity constant less than k=10, and suspended therein by multiple pointed suspension tips comprising said low thermally conductive material.
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Accused Products
Abstract
The present invention introduces a method of reducing conductive and convective heat loss from the battery unit in battery-powered devices, such as RFID tag devices. Battery heat loss prevention is accomplished by suspending the battery in a vacuum or within a low thermally conductivity gas, such as air, nitrogen, helium or argon. Further improvement is accomplished by using a minimum number of suspension points made of solid material which possesses a low thermally conductivity. The battery can be suspended by various means, the first of which totally encapsulates the battery using the minimum number of solid material suspension points mentioned above, and the second of which only a portion of the battery (such as the lower portion) is suspended in a low thermally conductive material and the upper portion is encapsulated by the low thermally conductive material fabricated in an arching structure that does not contact the upper portion of the battery. Both approaches allow suspension of the integrated circuit (IC) to be driven by the battery within the same confines of the battery by bonding the IC to the upper surface of the battery with the IC thereby residing underneath either the top solid material structure of the first approach or the arching structure of solid material of the second approach.
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Citations
35 Claims
- 1. A battery powered unit comprising an integrated circuit (IC) and a battery for powering said IC wherein said IC and said battery are enclosed in a low thermally conductive material having a thermal conductivity constant less than k=10, and suspended therein by multiple pointed suspension tips comprising said low thermally conductive material.
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12. A battery powered unit comprising an integrated circuit (IC) and a battery for powering said IC wherein said IC and said battery are enclosed in a low thermally conductive material having a thermal conductivity constant less than k=10, and suspended therein by multiple pointed suspension tips comprising said low thermally conductive material;
wherein said IC is attached to said battery by a bonding means and said thermally conductive material arches over said IC without making direct contact to said IC. - View Dependent Claims (13, 14, 15, 16, 17, 18)
- 19. A radio frequency (RF) transceiver system comprising first and second sending/receiving units wherein said second sending/receiving unit comprises a communication integrated circuit (IC) and a battery for powering said communication IC wherein said IC and said battery are enclosed in a low thermally conductive material having a thermal conductivity constant less than k=10, and suspended therein by multiple pointed suspension tips comprising said low thermally conductive material.
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29. A radio frequency (RF) transceiver system comprising first and second sending/receiving units wherein said second sending/receiving unit comprises a communication integrated circuit (IC) and a battery for powering said communication IC wherein said IC and said battery are enclosed in a low thermally conductive material having a thermal conductivity constant less than k=10, and suspended therein by multiple pointed suspension tips comprising said low thermally conductive material;
wherein said IC is attached to said battery by a bonding means and said thermally conductive material arches over said IC without making direct contact to said IC. - View Dependent Claims (30, 31, 32, 33, 34, 35)
Specification