Battery thermal management systems including heat spreaders with thermoelectric devices
First Claim
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1. A thermoelectric battery thermal management system configured to manage battery cell temperature, the system comprising:
- a battery cell comprising an electrode configured to deliver electric power to or from the battery cell, the electrode connected to the battery cell on a first side of the battery cell, wherein the battery cell is capable of generating a hotspot corresponding to a temperature increase of the battery cell when the battery cell is operating via the electrode delivering electric power to or from the battery cell, the hotspot having a center corresponding to a point or a region of the battery cell having a highest temperature relative to other regions of the battery cell;
a heat spreader on a second side of the battery cell and in thermal communication with the hotspot, the heat spreader over the center of the hotspot on the second side of the battery cell; and
a thermoelectric device comprising a main surface and a waste surface, the thermoelectric device configured to transfer thermal energy between the main surface and the waste surface of the thermoelectric device upon application of electric current to the thermoelectric device, wherein the main surface of the thermoelectric device is in thermal communication with the heat spreader to heat or cool the battery cell by adjusting a polarity of the electric current delivered to the thermoelectric device, wherein the thermoelectric device is proximate to a third side of the battery cell, and wherein a geometric center of the main surface of the thermoelectric device is substantially on a line along a shortest thermal path on the heat spreader from the center of the hotspot to the third side of the battery cell with the geometric center of the main surface of the thermoelectric device projected onto a plane of the heat spreader extending along the second side of the battery cell.
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Abstract
Disclosed embodiments include thermoelectric-based thermal management systems and methods configured to heat and/or cool an electrical device. Thermal management systems can include a heat spreader positioned near a localized heat general of the electrical device. A fin can be connected to the heat spreader with a thermoelectric device positioned on the fin. Electric power can be directed to the thermoelectric device to provide controlled heating and/or cooling to the electrical device.
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Citations
29 Claims
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1. A thermoelectric battery thermal management system configured to manage battery cell temperature, the system comprising:
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a battery cell comprising an electrode configured to deliver electric power to or from the battery cell, the electrode connected to the battery cell on a first side of the battery cell, wherein the battery cell is capable of generating a hotspot corresponding to a temperature increase of the battery cell when the battery cell is operating via the electrode delivering electric power to or from the battery cell, the hotspot having a center corresponding to a point or a region of the battery cell having a highest temperature relative to other regions of the battery cell; a heat spreader on a second side of the battery cell and in thermal communication with the hotspot, the heat spreader over the center of the hotspot on the second side of the battery cell; and a thermoelectric device comprising a main surface and a waste surface, the thermoelectric device configured to transfer thermal energy between the main surface and the waste surface of the thermoelectric device upon application of electric current to the thermoelectric device, wherein the main surface of the thermoelectric device is in thermal communication with the heat spreader to heat or cool the battery cell by adjusting a polarity of the electric current delivered to the thermoelectric device, wherein the thermoelectric device is proximate to a third side of the battery cell, and wherein a geometric center of the main surface of the thermoelectric device is substantially on a line along a shortest thermal path on the heat spreader from the center of the hotspot to the third side of the battery cell with the geometric center of the main surface of the thermoelectric device projected onto a plane of the heat spreader extending along the second side of the battery cell. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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16. A thermoelectric battery thermal management system configured to manage battery cell temperature, the system comprising:
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a first battery cell comprising a first electrode configured to deliver electric power to or from the first battery cell, the first electrode of the first battery cell connected to the first battery cell on a first side of the first battery cell, wherein the first battery cell is capable of generating a first hotspot corresponding to a temperature increase of the first battery cell when the first battery cell is operating via the first electrode of the first battery cell delivering electric power to or from the first battery cell, the first hotspot having a center corresponding to a point or a region of the first battery cell having a highest temperature relative to other regions of the first battery cell; a second battery cell comprising a first electrode configured to deliver electric power to or from the second battery cell, the first electrode of the second battery cell connected to the second battery cell on a first side of the second battery cell, wherein the second battery cell is capable of generating a second hotspot corresponding to a temperature increase of the second battery cell when the second battery cell is operating via the first electrode of the second battery cell delivering electric power to or from the second battery cell, the second hotspot having a center corresponding to a point or a region of the second battery cell having a highest temperature relative to other regions of the second battery cell; a first heat spreader on a second side of the first battery cell and in thermal communication with the first hotspot, the first heat spreader over the center of the first hotspot on the second side of the first battery cell; a second heat spreader on a second side of the second battery cell and in thermal communication with the second hotspot, the second heat spreader over the center of the second hotspot on the second side of the second battery cell, wherein the second sides of the first and second battery cells are substantially parallel to each other; a third heat spreader in thermal communication with the first and second heat spreaders; and a thermoelectric device comprising a main surface and a waste surface, the thermoelectric device configured to transfer thermal energy between the main surface and the waste surface of the thermoelectric device upon application of electric current to the thermoelectric device, wherein the main surface of the thermoelectric device is in thermal communication with the third heat spreader to heat or cool the first and second battery cells by adjusting a polarity of the electric current delivered to the thermoelectric device, wherein the thermoelectric device is proximate to a third side of the first battery cell, and wherein a geometric center of the main surface of the thermoelectric device is substantially on a line along a shortest thermal path on the first heat spreader from the center of the first hotspot to the third side of the first battery cell with the geometric center of the main surface of the thermoelectric device projected onto a plane of the first heat spreader extending along the second side of the first battery cell. - View Dependent Claims (17, 18, 19, 20, 21, 22, 23)
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24. A thermoelectric battery thermal management system configured to manage battery cell temperature, the system comprising:
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a battery cell comprising an electrode configured to deliver electric power to or from the battery cell, the electrode connected to the battery cell on a first surface of the battery cell, wherein the battery cell is capable of generating a hotspot corresponding to a temperature increase of the battery cell when the battery cell is operating via the electrode delivering electric power to or from the battery cell, the hotspot having a center corresponding to a point or a region of the battery cell having a highest temperature relative to other regions of the battery cell; a heat spreader positioned on a second surface of the battery cell and in thermal communication with the hotspot, the heat spreader positioned over the center of the hotspot on the second surface of the battery cell; a fin connected to the heat spreader and in thermal communication with the hotspot via the heat spreader, the fin positioned to provide a shortest thermal path along the heat spreader from the center of the hotspot to the fin, the fin on a first side of a plane, the plane parallel or tangential to the first surface where the electrode connects to the battery cell, wherein the electrode is on a second side of the plane; and a thermoelectric device comprising a main surface and a waste surface, the thermoelectric device configured to transfer thermal energy between the main surface and the waste surface of the thermoelectric device upon application of electric current to the thermoelectric device, wherein the main surface of the thermoelectric device is in thermal communication with the fin to heat or cool the battery cell by adjusting a polarity of the electric current delivered to the thermoelectric device, wherein the shortest thermal path on the heat spreader extends to a dimension of a perimeter of the main surface of the thermoelectric device when the dimension of the perimeter of the main surface of the thermoelectric device is projected onto a surface of the heat spreader where the fin connects to the heat spreader, wherein the battery cell has a cylindrical shape, and wherein the heat spreader circumscribes a perimeter of the battery cell about a central axis of the cylindrical shape, the central axis perpendicular to the plane.
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25. A method of manufacturing a thermoelectric battery thermal management system configured to manage battery cell temperature, the method comprising:
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connecting a heat spreader to a battery cell having an electrode configured to deliver electric power to or from the battery cell, the electrode connected to the battery cell on a first surface of the battery cell, wherein the battery cell is capable of generating a hotspot corresponding to a temperature increase of the battery cell when the battery cell is operating via the electrode delivering electric power to or from the battery cell, the hotspot having a center corresponding to a point or a region of the battery cell having a highest temperature relative to other regions of the battery cell, wherein the heat spreader is connected on a second surface of the battery cell to be in thermal communication with the hotspot, the heat spreader positioned over the center of the hotspot on the second surface of the battery cell; connecting a fin to the heat spreader in thermal communication with the hotspot, the fin positioned to provide a shortest thermal path along the heat spreader from the center of the hotspot to the fin, the fin on a first side of a plane, the plane parallel or tangential to the first surface where the electrode connects to the battery cell, wherein the electrode is on a second side of the plane; and connecting a thermoelectric device to the fin, the thermoelectric device comprising a main surface and a waste surface, the thermoelectric device configured to transfer thermal energy between the main surface and the waste surface of the thermoelectric device upon application of electric current to the thermoelectric device, wherein the main surface of the thermoelectric device is in thermal communication with the fin to heat or cool the battery cell by adjusting a polarity of the electric current delivered to the thermoelectric device, wherein a geometric center of the main surface of the thermoelectric device is positioned substantially along the shortest thermal path on the heat spreader when the geometric center of the main surface of the thermoelectric device is projected onto a surface of the heat spreader where the fin connects to the heat spreader. - View Dependent Claims (26, 27, 28, 29)
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Specification