DE-102026112184-A1 - Electrical energy storage and vehicle

Abstract

The invention relates to an electrical energy storage device (2) for a vehicle, comprising a housing (1) in which a cell block (3) with a plurality of electrically interconnected individual cells (4) is arranged. According to the invention, a polymer mass (5) is filled at least between the lateral housing walls (1.1) and the cell block (3), in which a flow channel (S1, S2) is formed, at least partially, for guiding venting gas towards a venting opening of the housing (1).

Inventors

• Thilo Heuft

Assignees

• Mercedes-Benz Group AG

Dates

Publication Date

20260513

Application Date

20260325

Claims (6)

1. Electrical energy storage device (2) for a vehicle with a housing (1) in which a cell block (3) with a plurality of electrically interconnected individual cells (4) is arranged, characterized in that at least between lateral housing walls (1.1) and the cell block (3) a polymer mass (5) is filled in which at least sectionally a flow channel (S1, S2) is formed for guiding venting gas in the direction of a venting opening of the housing (1).
2. Electrical energy storage (2) according to Claim 1 , characterized in that at least one further flow channel (S2) is sectionally limited by at least one housing wall (1.1) and/or by a housing bottom (1.3).
3. Electrical energy storage (2) according to Claim 1 or 2 , characterized in that the flow channel (S1) is lined with a protective layer (6).
4. Electrical energy storage (2) according to Claim 2 or 3 , characterized in that at least one further flow channel (S2) is lined with a protective layer (6).
5. Electrical energy storage device (2) according to one of the preceding claims, characterized in that the polymer mass (5) comprises a polymeric potting compound and/or a polymeric foam.
6. Vehicle with an electrical energy storage device (2) according to one of the preceding claims.

Description

The invention relates to an electrical energy storage device with a housing in which a cell block comprising a plurality of electrically interconnected individual cells is arranged. The invention further relates to a vehicle. From the CN 114204186 A A battery pack is known. The battery pack consists of a housing with an interior space in which several battery modules are mounted or several non-modularized battery cells are directly mounted, and an exhaust section provided in the housing and configured to discharge the gases generated in the interior space to the outside. The cross-sectional area of the exhaust outlet side, which connects to the exterior space of the housing, is smaller than the cross-sectional area of the exhaust inlet side, which connects to the interior space. Furthermore, the CN 114927825 A A traction battery for a motor vehicle. The traction battery comprises: a plurality of battery cells; a battery casing with multiple casing walls, the casing walls enclosing a receiving space for holding the battery cells, and one casing wall having a degassing unit for venting the hot gas from a battery cell out of the receiving space; and a degassing collector located outside the receiving space, with a degassing chamber that can expand due to the hot gas to accommodate the hot gas released from the receiving space. The degassing chamber is defined by a casing wall of the battery casing that includes the degassing unit, and by a plate-shaped, partially thermally conductive heat shield. The heat shield is mounted so that it is linearly displaceable relative to the casing wall, allowing the hot gas to be pushed away from the casing wall to expand the degassing chamber, and is designed to cool the hot gas by distributing the heat carried by the hot gas within the degassing chamber. The invention is based on the objective of providing an electrical energy storage device for a vehicle and a vehicle. The problem is solved according to the invention by an electrical energy storage device which has the features specified in claim 1, and by a vehicle which has the features specified in claim 6. Advantageous embodiments of the invention are the subject of the dependent claims. An electrical energy storage device for a vehicle comprises a housing in which a cell block with a plurality of electrically interconnected individual cells is arranged. According to the invention, a polymer mass is filled at least between the lateral housing walls and the cell block, in which a flow channel for guiding venting gases towards a venting opening of the housing is formed, at least in sections. The polymer mass filled into the housing between the housing walls and the cell block can serve to transmit force and absorb impact forces in the event of a vehicle collision. The flow channel for guiding venting gases is formed by the polymer mass filled into a volume portion of the housing. The venting gases can be guided precisely through the flow channel so that they can escape from the housing via the venting opening. Exemplary embodiments of the invention are explained in more detail below with reference to drawings. This shows: 1 schematically a sectional view of the housing of an electrical energy storage device with two flow channels, 2 schematically an enlarged section of the cross-sectional view in the area of a flow channel and 3 schematically an enlarged section of the cross-sectional view in the area of another flow channel. Corresponding parts are marked with the same reference symbols in all figures. 1 Figure 1 shows a sectional view of a housing 1 of an electrical energy storage device 2 with two flow channels S1, S2, wherein in 2 an enlarged section of the cross-sectional view in the area of a flow channel S1 and in 3 An enlarged section of the cross-sectional view is shown in the area of another flow channel S2. The electrical energy storage device 2 is in particular a vehicle battery, especially a traction battery, for an electric vehicle, a hybrid vehicle or a vehicle powered by fuel cells, wherein the electrical energy storage device 2 is usually arranged in a vehicle floor area of the respective vehicle. The housing 1 of the electrical energy storage device 2 contains at least one cell block 3 with a Multiple electrically interconnected individual cells arranged in 4. A polymer compound 5, for example a polymer potting compound and/or a polymer foam, is filled into the housing 1 between the cell block 3 and the housing walls 1.1. The polymer compound 5 thus creates a gap between the housing walls 1.1 and the cell block 3 up to a predetermined dimension or, as described in the 1 and 2 As shown, it is completely filled. Thus, cell block 3 is protected, especially on its circumference, and in the event of a collision, a transmission of mechanical forces between the housing 1 and cell block 3 is possible. In order to direct venting gas escaping from a defective cell 4 in the event of thermal runaway in a single cell