US5362942A
Expired / Lapsed
US
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Battery heating system using internal battery resistance
Assignee: InterDigital Technology Corp
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Filing: 1993-08-24
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Granted: 1994-11-08
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Expires: 2013-08-24
Abstract
Abstract A battery heater uses the internal resistance of the battery as the battery heating element. In one embodiment, a DC battery charger and a programmable battery load, is used in a closed loop temperature control system. In another embodiment, a DC battery charger and a resistor or small auxiliary battery heater, is used in a closed loop temperature control system. The programmable load or the small auxiliary battery heater, is enabled during full charge, low temperature conditions. The resistor or small auxiliary heater serves to both heat the battery and draw down the battery charge. In yet another embodiment, an AC heater power supply and a DC battery charger, is coupled to the battery in a closed loop temperature control system.
Inventors
- 👤 William T. Vanderslice, Jr.
- 👤 Christopher J. Scafidi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 20:18
CPC Classifications
H; H05; H05B; H05B1/00; H05B1/02; H05B1/0227; H05B1/023; B; B60; B60L; B60L58/00; B60L58/10; B60L58/24; B60L58/25; B60L58/27; H01; H01M; H01M10/00; H01M10/60; H01M10/61; H01M10/615; H01M10/62; H01M10/625; H01M10/63; H01M10/633; H01M10/637; H01M10/65; H01M10/657; H01M10/6571; H02; H02J; H02J7/00; H05B3/00; H05B3/60; B60L2240/00; B60L2240/40; B60L2240/54; B60L2240/545; Y; Y02; Y02E; Y02E60/00; Y02E60/10; Y02T; Y02T10/00; Y02T10/60; Y02T10/70
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
158 words
A method for controlling the temperature of a battery having first and second battery terminals and an internal resistance between said first and second battery terminals, comprising the steps of: (a) sensing the temperature of said battery to provide a sensed battery temperature; (b) comparing said sensed battery temperature to a predetermined temperature; (c) responsive to step (b) indicating that the temperature of said battery is less than said predetermined temperature, conducting a current between said first and second battery terminals through said battery; (d) sensing the charge level of said battery to provide a sensed battery charge level; (e) comparing said sensed battery charge level to a predetermined charge level; and (f) responsive to step (e) indicating that said sensed battery charge level is above said predetermined charge level and responsive to step (b) indicating that the temperature of said battery is less than said predetermined temperature, connecting a load across said first and second battery terminals.
Claim 2
Independent Claim
158 words
A method for controlling the temperature of a battery having first and second battery terminals and an internal resistance between said first and second battery terminals, comprising the steps of: (a) sensing the temperature of said battery to provide a sensed battery temperature; (b) comparing said sensed battery temperature to a predetermined temperature; (c) responsive to step (b) indicating that the temperature of said battery is less than said predetermined temperature, conducting a current between said first and second battery terminals through said battery; (d) sensing the charge level of said battery to provide a sensed battery charge level; (e) comparing said sensed battery charge level to a predetermined charge level; and (f) responsive to step (e) indicating that said sensed battery charge level is above said predetermined charge level and responsive to step (b) indicating that the temperature of said battery is less than said predetermined temperature, connecting a load across said first and second battery terminals.
Claim 3
Dependent Claim
70 words
A method in accordance with claim 1, comprising the additional steps of: (g) responsive to step (e) indicating that said sensed battery charge level is above said predetermined charge level and responsive to step (b) indicating that the temperature of said battery is less than said predetermined temperature, timing a predetermined time interval; and (h) connecting said load across said first and second battery terminals for said predetermined time interval.
Claim 4
Dependent Claim
36 words
A method in accordance with claim 2, comprising the additional step of: (i) disabling said step (c) of conducting a current between said first and second battery terminals through said battery during said predetermined time interval.
Claim 5
Dependent Claim
21 words
A method in accordance with claim 3, wherein said load comprises an auxiliary heating element in close proximity with said battery.
Claim 6
Independent Claim
200 words
An apparatus for controlling the temperature of a battery wherein said battery has first and second battery terminals and an internal resistance between said first and second battery terminals, said apparatus comprising: means for sensing the temperature of said battery to provide a sensed battery temperature; means for comparing said sensed battery temperatures to a predetermined temperature; means for conducting a current between said first and second battery terminals through said battery, responsive to said means for comparing the temperature of said sensed battery temperature to said predetermined temperature indicating that the temperature of said battery is less than said predetermined temperature; means for sensing the charge level of said battery to provide a sensed battery charge level; means for comparing said sensed battery charge level to a predetermined charge level; and means for connecting a load across said first and second battery terminals responsive to said means for comparing said sensed battery charge level to said predetermined charge level indicating that said sensed battery charge level is above said predetermined charge level and responsive to said means for comparing said sensed temperature to said predetermined temperature indicating that the temperature of said battery is less than said predetermined temperature.
Claim 7
Independent Claim
200 words
An apparatus for controlling the temperature of a battery wherein said battery has first and second battery terminals and an internal resistance between said first and second battery terminals, said apparatus comprising: means for sensing the temperature of said battery to provide a sensed battery temperature; means for comparing said sensed battery temperatures to a predetermined temperature; means for conducting a current between said first and second battery terminals through said battery, responsive to said means for comparing the temperature of said sensed battery temperature to said predetermined temperature indicating that the temperature of said battery is less than said predetermined temperature; means for sensing the charge level of said battery to provide a sensed battery charge level; means for comparing said sensed battery charge level to a predetermined charge level; and means for connecting a load across said first and second battery terminals responsive to said means for comparing said sensed battery charge level to said predetermined charge level indicating that said sensed battery charge level is above said predetermined charge level and responsive to said means for comparing said sensed temperature to said predetermined temperature indicating that the temperature of said battery is less than said predetermined temperature.
Claim 8
Dependent Claim
90 words
An apparatus in accordance with claim 5, further comprising: means for timing a predetermined time interval responsive to said means for comparing said sensed battery charge level to said predetermined charge level indicating that said sensed battery charge level is above said predetermined charge level and responsive to said means for comparing said sensed temperature to said predetermined temperature indicating that the temperature of said battery is less than said predetermined temperature; and means for connecting said load across said first and second battery terminals for said predetermined time interval.
Claim 9
Dependent Claim
33 words
An apparatus in accordance with claim 6 further comprising: means for disabling said means for conducting a current between said first and second battery terminals through said battery during said predetermined time interval.
Claim 10
Dependent Claim
21 words
An apparatus in accordance with claim 7, wherein said load comprises an auxiliary heating element in close proximity with said battery.
References Cited (Backward Citations)
US2442380A
Cited
US2679549A
Cited
US2710937A
Cited
US2710936A
Cited
US3264546A
Cited
US3617850A
Cited
US3656045A
Cited
US4025861A
Cited
US4222000A
Cited
US4171508A
Cited
US4667140A
Cited
US4692682A
Cited
US4762978A
Cited
US4926106A
Cited
US4847468A
Cited
US5082075A
Cited
US5055656A
Cited
US5252411A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1997-11-07 | 1998-05-09 | 1998-11-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 2001-11-07 | 2002-05-09 | 2002-11-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2005-11-07 | 2006-05-09 | 2006-11-08 | $7700.00 | Window Closed / Lapsed |