Battery having an integral cooling system

• US 6,512,347 B1
• Filed: 10/18/2001
• Issued: 01/28/2003
• Est. Priority Date: 10/18/2001
• Status: Active Grant

• Current Assignee: GM Global Technology Operations LLC (General Motors Company)
• Original Assignee: General Motors Corporation (Motors Liquidation Co. GUC Trust)
• Inventors: Zhu, Jianmin, Hellmann, John Vincent
• Primary Examiner(s): Tso, Edward H.
• Assistant Examiner(s): LUK, LAWRENCE W
• Application Number:
  US09/978,901
• Time in Patent Office: 467 Days
• Field of Search: 320/107, 320/104, 320/101, 429/26, 429/120
• US Class Current: 320/107
• CPC Class Codes: H01M 10/613 Cooling or keeping cold
• CPC Class Codes: H01M 10/625 Vehicles
• CPC Class Codes: H01M 10/647 Prismatic or flat cells, e.g. pouch cells
• CPC Class Codes: H01M 10/6557 arranged between the cells
• CPC Class Codes: H01M 10/6565 with recirculation or U-turn in the flow path, i.e. back and forth
• CPC Class Codes: H01M 10/6567 Liquids
• CPC Class Codes: Y02E 60/10 Energy storage using batteries

Abstract

A battery system including at least one battery cell having an interior and having at least one exterior surface is provided with at least one cooling plate that is positioned in engagement with the exterior surface for absorbing heat from the interior of the battery cell. A cooling tube is thermally coupled to the cooling plate for absorbing heat from the cooling plate.

Claims

1. A battery system for use in an electric vehicle, comprising:

at least one battery cell having an interior and at least one exterior surface;

at least one cooling plate in engagement with said at least one exterior surface for absorbing heat from the interior of said at least one battery cell; and

a cooling tube thermally coupled to said at least one cooling plate for absorbing heat from said at least one cooling plate wherein a liquid coolant flows through said cooling tube.

2. A battery system according to claim 1 wherein said at least one battery cell comprises a plurality of adjacent battery cells and wherein said at least one cooling plate comprises a plurality of cooling plates, each one of said plurality of cooling plates thermally coupled to said cooling tube and positioned between adjacent ones of said plurality of adjacent battery cells.

3. A battery system according to claim 2 wherein said cooling tube contains a coolant.

4. A battery system according to claim 3 wherein said coolant is liquid.

5. A battery system according to claim 3 wherein said coolant is gaseous.

6. A battery system according to claim 3 further comprising a heat exchanger thermally coupled to said cooling tube for altering the temperature of said coolant.

7. A battery system according to claim 6 wherein said heat exchanger is a heat pump.

8. A battery system according to claim 6 wherein said heat exchanger is a radiator.

9. A battery system according to claim 6 wherein said cooling tube is made of a heat-conducting metal.

10. A battery system according to claim 9 wherein said plurality of cooling plates is made of a heat-conducting metal.

11. A battery system according to claim 10 wherein said cooling tube and said plurality of cooling plates are made of aluminum.

12. A battery system according to claim 10 wherein cooling tube and said plurality of cooling plates are made of copper.

13. A battery system according to claim 9 wherein said plurality of cooling plates is thermally coupled to said cooling tube by brazing.

14. A liquid cooled battery assembly for use in an electric vehicle, comprising:

a plurality of battery cells;

a plurality of cooling plates, each one of said plurality of cooling plates positioned between adjacent ones of said plurality of battery cells for absorbing heat from said plurality of battery cells;

at least one liquid-containing cooling tube thermally coupled to each of said plurality of cooling plates for absorbing heat from said plurality of cooling plates; and

a heat exchanger thermally coupled to said liquid-containing cooling tube for altering the temperature of the liquid in said liquid-containing cooling tube.

15. A liquid cooled battery assembly according to claim 14 wherein said heat exchanger is a heat pump.

16. A liquid cooled battery assembly according to claim 14 wherein said heat exchanger is a radiator.

17. A liquid cooled battery assembly according to claim 14 wherein said plurality of cooling plates and said at least one liquid-containing cooling tube are made of a heat-conducting metal.

18. A liquid cooled battery assembly according to claim 17 wherein said heat-conducting metal is aluminum.

19. A liquid cooled battery assembly according to claim 17 wherein said heat-conducting metal is copper.

20. A liquid cooled battery assembly according to claim 17 wherein each of said plurality of cooling plates is thermally coupled to said at least one liquid-containing cooling tube by brazing.

21. A liquid cooled battery assembly for use in an electric vehicle, comprising:

a vehicle body;

a plurality of wheels coupled to said vehicle body;

a plurality of battery cells contained in said vehicle body;

a plurality of cooling plates, each one of said plurality of cooling plates positioned between adjacent ones of said plurality of battery cells for absorbing heat from said plurality of battery cells;

at least one liquid-containing cooling tube thermally coupled to each of said plurality of cooling plates for absorbing heat from said plurality of cooling plates;

a heat exchanger thermally coupled to said liquid-containing cooling tube for altering the temperature of the liquid in said liquid-containing cooling tube; and

at least one electric motor propelling said plurality of wheels.