Battery housing for battery module of a traction battery of a motor vehicle

Patent metadata

Field	Value
Publication number	US-11993176-B2
Application number	US-202117381523-A
Country	US
Kind code	B2
Filing date	Jul 21, 2021
Priority date	Jul 22, 2020
Publication date	May 28, 2024
Grant date	May 28, 2024

Abstract

A battery housing for a battery module of a traction battery of a motor vehicle has (i) a housing for enclosing at least one battery cell of the battery module, (ii) at least one cooling groove which is formed in at least one housing wall of the housing after which is open away from the battery cell and which serves for conducting a cooling fluid, and (iii) a cover which is configured as a planar plate and which is connected to the housing wall and which serves for closing the at least one cooling groove. Owing to the cooling groove formed in the housing wall, the cover can be configured as an inexpensive planar plate, such that cooling of a battery module is made possible with little outlay in terms of production.

First claim

What is claimed:

1. A battery housing for a battery module of a traction battery of a motor vehicle, said battery housing comprising:
a housing for enclosing at least one battery cell of the battery module, the housing having an extruded rectangular profile including a lower housing wall, an upper housing wall, and two side housing walls;
at least one cooling groove formed in the upper housing wall, wherein the at least one cooling groove serves for conducting a cooling fluid, and the at least one cooling groove is open in a direction facing away from the battery cell;
a cover in the form of a planar plate that is connected to the upper housing wall and which serves for closing the at least one cooling groove; and
at least one housing inlet opening that is fluidly connected to the at least one cooling groove, the at least one housing inlet opening being disposed on an end side of the upper housing wall, and wherein the at least one housing inlet opening is disposed at an elevation below the cover.

2. The battery housing as claimed in claim 1 , wherein the cover comprises (i) at least one cover inlet opening that is formed in the cover and communicates with the cooling groove and serves for the feed of the cooling fluid, and/or (ii) an outlet opening that communicates with the cooling groove and serves for the discharge of the cooling fluid.

3. The battery housing as claimed in claim 1 , further comprising an outlet opening which serves for the discharge of the cooling fluid and is disposed on a top surface of the upper housing wall, and that is delimited by the cooling groove and by the cover, wherein the at least one housing inlet opening serves for the feed of the cooling fluid.

4. The battery housing as claimed in claim 1 , wherein the housing is configured as an extruded rectangular tube, and wherein the at least one cooling groove is formed by compression forming and/or cutting.

5. The battery housing as claimed in claim 1 , wherein the upper housing wall is configured for dissipating mechanical loads, wherein a material, which delimits the at least one cooling groove of the upper housing wall, contributes to stiffening of the upper housing wall.

6. The battery housing as claimed in claim 1 , wherein the cooling groove has a shape configuration which deviates from a straight profile, and wherein the cooling groove runs in an angled and/or zigzag-shaped and/or meandering manner.

7. A battery housing for a battery module of a traction battery of a motor vehicle, said battery housing comprising:
a housing for enclosing at least one battery cell of the battery module, the housing having an extruded rectangular profile including a lower housing wall, an upper housing wall, and two side housing walls;
at least one cooling groove and a centering body formed in the upper housing wall, wherein the at least one cooling groove serves for conducting a cooling fluid, and the at least one cooling groove is open in a direction facing away from the battery cell; and
a cover in the form of a planar plate that is connected to the upper housing wall and which serves for closing the at least one cooling groove, wherein the cover has a centering opening that is configured to be mounted onto the centering body of the upper housing wall, and wherein the centering opening in the cover and the centering body in the upper housing wall define a relative position of the cover with respect to the upper housing wall, such that the cover does not require elevations which protrude out of a material plane of the cover.

8. The battery housing as claimed in claim 1 , wherein the housing has at least two housing walls that are each equipped with at least one cooling groove.

9. A battery module for a traction battery of a motor vehicle, having at least one battery cell and having said battery housing as claimed in claim 1 for enclosing the at least one battery cell, wherein the battery cell lies directly, or exclusively only via a heat-conducting layer, against the upper housing wall equipped with the at least one cooling groove.

10. The battery module as claimed in claim 9 , wherein the only active temperature control of the at least one battery cell is provided exclusively by way of the exchange of heat of the at least one battery cell with the cooling fluid that can be caused to flow in the at least one cooling groove.

11. The battery housing as claimed in claim 1 , wherein the housing has at least four housing walls each equipped with more than one cooling groove.

12. The battery housing as claimed in claim 3 , wherein the cooling fluid enters through the at least one housing inlet opening and exits through the outlet opening orthogonally with respect to an extrusion direction of the housing.

13. The battery housing as claimed in claim 1 , further comprising a second cover provided on one of the bottom housing wall or one of the two side housing walls.

14. The battery housing as claimed in claim 1 , wherein the housing comprises plastics material and the housing is configured as a rectangular profile with a partition extending in a longitudinal direction of the housing.

15. The battery housing as claimed in claim 14 , wherein the partition divides the housing into multiple sub-chambers.

16. The battery housing as claimed in claim 1 , wherein the cooling grooves are arranged between the upper housing wall and the cover.

17. The battery housing as claimed in claim 3 , wherein the outlet opening is formed at an edge of the upper housing wall between the cooling groove and the cover.

18. The battery housing as claimed in claim 1 , wherein the at least one housing inlet opening is disposed on the top surface of the upper housing wall at a location spaced away from an edge of the upper housing wall.

19. The battery housing as claimed in claim 1 , wherein the at least one housing inlet opening is disposed on the top surface of the upper housing wall at an end side of the upper housing wall with respect to a longitudinal extent of the housing and away from the edge of the cover.

20. The battery housing as claimed in claim 1 , wherein the at least one housing inlet opening is disposed on the top surface of the upper housing wall at an end side of the upper housing wall and wherein the at least one housing inlet opening is oriented transversely with respect to the longitudinal extent of the housing.

21. The battery housing as claimed in claim 1 , wherein the cover comprises a plurality of cover inlet openings that communicate with the cooling groove and serves for the feed of the cooling fluid, and wherein a first group of the plurality of cover inlet openings are arranged along a first line parallel to an end side of the cover and transversely with respect to a longitudinal extent of the housing.

22. The battery housing as claimed in claim 21 , wherein a second group of the plurality of cover inlet openings are arranged along a second line parallel to the end side of the cover and transversely with respect to the longitudinal extent of the housing, and wherein the first line is closer to the end side of the cover than the second line.

Assignees

• Porsche Ag

Inventors

• Kellner Philipp
• Volkmer Christopher
• Mostofi Sascha
• Vogel Immanuel
• Schiebel Dieter
• Neuhauser Thomas

Classifications

• B60L58/26 Primary

  by cooling · CPC title

• B60L50/64

  Constructional details of batteries specially adapted for electric vehicles · CPC title

• H01M50/258 Primary

  Modular batteries; Casings provided with means for assembling · CPC title

• H01M10/6556 Primary

  Solid parts with flow channel passages or pipes for heat exchange (closed pipes H01M10/6552) · CPC title

• H01M50/249

  specially adapted for aircraft or vehicles, e.g. cars or trains (constructional details of batteries specially adapted for electric vehicles B60L50/64) · CPC title