COOLING PLATE FOR AN ELECTRICAL ENERGY STORAGE ELEMENT

Abstract

The invention relates to a cooling plate for an electric energy storage element, said cooling plate comprising at least two non-detachably interconnected metal sheets and at least one plastic covering. The joined metal sheets comprise at least one cooling channel which can be created by separating means.

Claims

1. A cooling plate for an electrical energy storage element, the cooling plate comprising at least two metal sheets that are connected to one another in a non-detachable manner, and the cooling plate also comprising at least one synthetic material cover, wherein the connected metal sheets comprise at least one cooling channel that is inflated by means of a separating agent.

2. The cooling plate for an electrical energy storage element as claimed in claim 1, characterized in that the metal sheets are made of aluminum, aluminum alloys, copper and/or gold.

3. The cooling plate for an electrical energy storage element as claimed in claim 1, characterized in that the synthetic material cover is an electrical insulator.

4. A method for producing a cooling plate as claimed in claim 1, said method comprising the following steps: applying a separating agent to at least a first area of a first one of the two metal sheets, producing a mechanically non-detachable connection between second areas of the first metal sheet and a second one of the two metal sheets, forming the at least one cooling channel by means of inflating the first area, and fixing the synthetic material cover to at least one surface of the connected metal sheets, said surface being remote from the mechanically non-detachable connection.

5. The method for producing a cooling plate as claimed in claim 4, characterized in that the mechanically non-detachable connection is produced by means of roll bonding.

6. The method for producing a cooling plate as claimed in claim 4, characterized in that the separating agent is printed onto the metal sheet.

7. The method for producing a cooling plate as claimed in claim 4, characterized in that pressurized air is used for inflating the first area.

8. The method for producing a cooling plate as claimed in claim 4, characterized in that the synthetic material cover is fixed to the at least one surface of the connected metal sheets by means of clips, ultrasonic welding, adhesive bonding and/or screws.

9. An electrical energy storage element having at least one cooling plate as claimed in claim 1, characterized in that the cooling plate is mechanically connected to the electrical energy storage element and a cooling agent of a cooling circuit flows along the at least one cooling channel of the cooling plate.

10. (canceled)

11. The cooling plate for an electrical energy storage element as claimed in claim 1, wherein the synthetic material cover is fixed to at least one surface of the connected metal sheets, said surface being remote from the non-detachable connection.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In the figures:

[0022] FIG. 1a illustrates a first method step for producing the cooling plate in accordance with the invention;

[0023] FIG. 1b illustrates a second method step for producing the cooling plate in accordance with the invention;

[0024] FIG. 1c illustrates a sectional view through one embodiment of the cooling plate in accordance with the invention implementation of a third and a fourth method step; and

[0025] FIG. 2 illustrates a first possible use of the cooling plate in accordance with the invention.

[0026] FIG. 3 illustrates a second and third possible use of the cooling plate in accordance with the invention.

DETAILED DESCRIPTION

[0027] Like reference numerals describe like device components in all figures.

[0028] FIG. 1a illustrates a first metal sheet 1 and a second metal sheet 2, wherein a separating agent is applied to at least a first area 3(1) of the first metal sheet 1 and a second area 3(2) of the first metal sheet 1 does not receive any separating agent. The separating agent is applied to the first metal sheet 1 in a first method step, by way of example by means of a printing process.

[0029] In FIG. 1b, the first metal sheet 1 and the second metal sheet 2 are connected to one another in a mechanically non-detachable manner, by way of example the connection is established in a second method step by means of roll bonding.

[0030] FIG. 1c illustrates a sectional view along the plane A-A, indicated in FIG. 1b, of a finished cooling plate 10, wherein at least one cooling channel 6 is formed in a third method step by means of inflating the first area 3(1) that is lying within the mechanically non-detachable connection of the first metal sheet 1 and the second metal sheet 2 and in a fourth method step synthetic material covers 4, 5 are fixed on the surfaces that are remote from the mechanically non-detachable connection.

[0031] FIG. 2 illustrates a first possible use of the cooling plate 10 in accordance with the invention, said cooling plate being arranged spatially between two energy storage elements 7(1), 7(2), by way of example battery cells or battery modules. Synthetic material covers 4, 5 that form a synthetic material casing around the metal sheets 1,2 are fixed on the surfaces that are remote from the mechanically non-detachable connection. The cooling plate 10 is connected to a cooling circuit by means of two cooling channels 6(1), 6(2).

[0032] FIG. 3 illustrates a second use of the cooling plate 10(2) in accordance with the invention, said cooling plate being arranged spatially on an upper surface, by way of example between the connection poles of battery cells, of electrical energy storage elements 7(1), 7(2), 7(3).

[0033] A third use of the cooling plate 10(1) in accordance with the invention is illustrated in FIG. 3, said cooling plate being arranged spatially on the lower surface, by way of example as a base plate of the battery cells, of the electrical energy storage elements 7(1), 7(2), 7(3).

[0034] In a further possible use, the cooling plate is arranged within a housing of the electrical energy storage elements 7(1), 7(2), 7(3). As a result of the electrically insulating synthetic material and the high degree of tightness, the cooling plate in accordance with the invention can be arranged, by way of example, within a battery cell housing.