BATTERY ASSEMBLY WITH TEMPERATURE CONTROL DEVICE

• US 20070259258A1
• Filed: 05/03/2007
• Published: 11/08/2007
• Est. Priority Date: 05/04/2006
• Status: Abandoned Application

• Current Assignee: EnerDel, Inc. (Ener1, Inc.)
• Original Assignee: EnerDel, Inc. (Ener1, Inc.)
• Inventors: Buck, Derrick Scott
• Application Number:
  US11/743,777
• Publication Number:
  US 20070259258A1
• Time in Patent Office: Days
• US Class Current: 429/120
• CPC Class Codes: B29C 44/1233 the preformed parts being supported during expanding
• CPC Class Codes: B29C 44/1271 the preformed parts being partially covered
• CPC Class Codes: F28D 2021/0029 Heat sinks
• CPC Class Codes: F28F 9/005 Other auxiliary members within casings, e.g. internal filling means or sealing means
• CPC Class Codes: H01M 10/0481 Compression means other than compression means for stacks of electrodes and separators
• CPC Class Codes: H01M 10/052 Li-accumulators
• 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 10/653 characterised by electrically insulating or thermally conductive materials
• CPC Class Codes: H01M 10/6551 Surfaces specially adapted for heat dissipation or radiation, e.g. fins or coatings
• CPC Class Codes: H01M 10/6554 Rods or plates
• CPC Class Codes: H01M 10/6563 with forced flow, e.g. by blowers
• CPC Class Codes: H01M 50/209 adapted for prismatic or rectangular cells H01M50/216 takes precedence
• CPC Class Codes: H01M 50/24 adapted for protecting batteries from their environment, e.g. from corrosion thermal insulation H01M10/658
• CPC Class Codes: H01M 50/293 characterised by the material
• CPC Class Codes: Y02E 60/10 Energy storage using batteries
• CPC Class Codes: Y02P 70/50 Manufacturing or production processes characterised by the final manufactured product
• CPC Class Codes: Y10T 29/49108 Electric battery cell making

Abstract

A battery assembly has a plurality of battery packs each presenting a housing and multiple cells adjacent one and the other and disposed in the housing. A foam solution is injected into the case of each battery pack. The foam extends around each cell and the case to encapsulate each cell thereby eliminating air gaps between the cells and the case and receiving heat generating by the cells in operational mode of the battery pack.

Claims

1. A battery pack assembly comprising;

a housing presenting an enclosure,

a plurality of cells disposed in said enclosure,

a plurality of fins from a heat absorbing material sandwiched between said cell and extending beyond said housing for receiving heat from said cells and sinking heat away from said housing, and

a foam injected between said housing and said cells and surrounding said cells and said fins with said foam fusibly interconnecting said cells with said housing and compressing said cell relative to one another.

2. A battery pack assembly as set forth in claim 1 wherein said housing includes side walls and terminals ends with said housing being molded from a polymeric material.

3. A battery pack assembly as set forth in claim 2 wherein each of said cells is a lithium cell having a prismatic configuration.

4. A battery pack assembly as set forth in claim 3 wherein each of said fins is sandwiched between each of said cells and extends beyond said side walls thereby receiving heat from said cells and sinking heat away from said housing.

5. A battery pack assembly as set forth in claim 3 wherein each of said fins is sandwiched between each of said cells and extending beyond said housing in alternating fashion thereby receiving heat from said cells and sinking heat away from said housing.

6. A battery pack assembly as set forth in claim 3 wherein each of said fins is formed from a thermally conductive material.

7. A battery pack assembly as set forth in claim 1 wherein said foam is a two-part polyurethane and a closed cell foam.

8. A battery pack assembly as set forth in claim 1 wherein said foam is a low density foam, said low density being at least equal to or greater than 0.5 lb/ft³.

9. A battery pack assembly as set forth in claim 1 wherein said foam occupies less than 5% of the internal volume of said housing.

10. A battery pack assembly as set forth in claim 1 wherein said cells disposed in said housing include an electronic controller operably communicating with said cells and a connector connected with said controller and said cells and extending beyond said housing.

11. A battery pack assembly as set forth in claim 1 wherein said housing includes at least one member extending from said housing for connecting said housing to a surface.

12. A method of forming a battery pack, said method comprising the steps of:

forming a housing;

placing a plurality of cells disposed into the housing;

sandwiching a plurality of fins formed from a thermally conductive material between the cells and extending the fins through and outwardly from the housing to receive heat from the cells and sink heat away from the housing; and

injecting a foam to surround the cells and the housing and the fins to fusibly interconnect the cells with the housing and to compress the cells relative to one another.

13. A method as set forth in claim 12 wherein the step of sandwiching the fins is further defined by sandwiching the fins between each of the cells and extending beyond the housing to absorb heat from the cells and sink heat away from the housing.

14. A method as set forth in claim 12 wherein the step of sandwiching the fins is further defined by sandwiching the fins between each of the cells in alternating fashion and extending beyond the housing to receive heat from the cells and sink heat away from the housing.

15. A method as set forth in claim 12 including the step of forming the fins from a thermally conductive material.

16. A method as set forth in claim 12 wherein the step of injecting the foam between the cells is further defined by injecting the two-part polyurethane and a closed cell foam.

17. A method as set forth in claim 12 wherein the step of injecting the foam between the cells is further defined by injecting a low density foam.

18. A method as set forth in claim 12 wherein the step of injecting the foam between the cells is further defined by injecting the foam to occupy less than 5% of the internal volume of said housing.

19. A method as set forth in claim 12 including the step of connecting an electronic controller to the cells.

20. A method as set forth in claim 12 including the step of forming at least on member extending from the housing to connect the housing to a surface.

21. A vehicle having a battery pack assembly, said vehicle comprising:

a plurality of cells connected with one another, and

a housing formed from a foam injected at least partially between said cells and encapsulating said cell for receiving heat from said cells and sinking heat away from said housing, said housing presenting sides and peripheral ends and at least one member integral with and extending from at least one of said sides and peripheral ends for connecting said housing to said vehicle.

22. A vehicle as set forth in claim 21 wherein each of said cells is a lithium cell having a prismatic configuration.

23. A vehicle as set forth in claim 21 wherein said foam is a two-part polyurethane and a closed cell foam.

24. A vehicle as set forth in claim 21 wherein said foam is a low density foam, said low density being at least equal to or greater than 0.5 lb/ft³.

25. A vehicle as set forth in claim 21 wherein said cells disposed in said housing includes an electronic controller operably communicating with said cells and a connector connected with said controller and said cells and extending beyond said housing.

26. A vehicle as set forth in claim 21 including at least two of said housings.

27. A vehicle as set forth in claim 26 including at least one fan adjacent said housings for forcing fluid into each of said housings for removing heat from said housings.

28. A method of forming a battery pack assembly comprising the steps of:

placing a plurality of cells connected with one another into a mold having a cavity;

injecting a foam into the cavity to form a housing as the foam extends at least partially between the cells and encapsulates the cell to receive heat from the cells and to sink heat away from the housing; and

forming sides and peripheral ends of the housing and at least one member integral with and extending from at least one of the sides and peripheral ends;

removing the housing from the mold.

29. A battery pack assembly for comprising;

at least one housing presenting sides and terminal ends;

wherein said housing includes at least one member extending from said housing for connecting said housing to a surface,

a plurality of lithium cells disposed in said housing, each said cell having at least one first electrode and at least one second electrode of charge opposite from the first electrode and a separator positioned between the first and second electrodes for conducting electrolyte therebetween,

a controller operably communicating with each of said cells and disposed inside said housing,

a plurality of fins formed from a heat absorbing material being sandwiched between said cell and extending beyond said housing for receiving heat from said cells and sinking heat away from said housing,

a foam injected between said cells and said housing and said fins with said foam fusibly interconnecting said cells with said housing and compressing said cell relative to one another, and

at least one fan adjacent said at least one housings for forcing fluid into each of said at least one housing for removing heat from said at least one housing.