BATTERY MODULE WITH CELL DEGASSING OPENINGS

Abstract

A battery module includes a plurality of battery cells, a cuboidal module housing, and, on a degassing side of the module housing, at least one module degassing opening. The battery module is connected to a temperature control system and the plurality of battery cells is directly surrounded by the flow of a temperature control fluid. A respective battery cell includes a cell degassing opening, wherein all cell degassing openings are arranged so as to point to the degassing side. The at least one module degassing opening and the respective cell degassing openings are directly connected to at least one degassing region. The at least one degassing region is delimited from the temperature control fluid. The at least one degassing region is smaller in its surface area extension than the degassing side, such that the temperature control fluid passes between the degassing side and the battery cells.

Claims

1. A battery module comprising: a plurality of battery cells, a cuboidal module housing, and at least one module degassing opening disposed on a degassing side of the module housing, wherein the battery module is connected to a temperature control system and the plurality of battery cells is directly surrounded by a flow of a temperature control fluid, wherein each battery cell comprises a cell degassing opening, and wherein all of the cell degassing openings are arranged to point to the degassing side, wherein the at least one module degassing opening and the respective cell degassing openings are directly connected to at least one degassing region, wherein the at least one degassing region is delimited from the temperature control fluid, and wherein the at least one degassing region has a smaller surface area extension than the degassing side such that the temperature control fluid passes between the degassing side and the battery cells.

2. The battery module according to claim 1, wherein the at least one degassing region is delimited from the temperature control fluid by at least one seal.

3. The battery module according to claim 1, wherein the degassing region is formed by a seal extending around a plurality of cell degassing openings that are respectively closed with a closing part or a bursting element and, on the degassing side, around at least one module degassing opening.

4. The battery module according to claim 1, wherein a number of respective module degassing openings is equal to a number of cell degassing openings of the plurality of battery cells arranged in the battery module and is also equal to a number of degassing regions, and wherein the respective module degassing opening and the respective cell degassing openings are arranged so as to be flush opposite one another.

5. The battery module according to claim 4, wherein a respective cell degassing opening is positively connected to the respective module degassing opening and/or to a seal enclosing the respective cell degassing opening.

6. The battery module according to claim 1, wherein the degassing side, which has the at least one module degassing opening, constitutes an underside of the battery module.

7. The battery module according to claim 6, wherein the battery module is integrated into an underbody structure of a motor vehicle.

8. The battery module according to claim 1, wherein the at least one module degassing opening is closed by either a closing part or a bursting element.

9. The battery module according to claim 1, further comprising at least one busbar for interconnecting the plurality of battery cells in the module housing, wherein the busbar is arranged on a side of the battery cell that is either adjacent to or opposite a side of the battery cell having the cell degassing opening.

10. A battery system comprising at least one battery module according to claim 1 and a temperature control system, wherein the temperature control system is configured to provide a perfusion of the at least one battery module with a dielectric temperature control fluid.

11. A motor vehicle comprising the battery module of claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The figures are described in a coherent and comprehensive manner, and the same reference numbers are assigned to identical components.

[0028] FIG. 1 schematically shows a perspective view of a configuration of the battery system according to aspects of the invention with battery modules.

[0029] FIG. 2 schematically shows a perspective view of a configuration of a battery module according to aspects of the invention.

[0030] FIG. 3 schematically shows a perspective sectional view of a further configuration of a battery module according to aspects of the invention.

[0031] FIG. 4 schematically shows a perspective sectional view of a degassing region of yet another further configuration of the battery module according to aspects of the invention.

[0032] FIG. 5 schematically shows a sectional view of a flow region for a temperature control fluid of yet another further configuration of a battery module according to aspects of the invention.

DETAILED DESCRIPTION OF THE INVENTION

[0033] In FIG. 1, a perspective view of a configuration of the battery system 10 according aspects of to the invention with battery modules 11 is shown schematically. The battery modules 11, which comprise battery cells stacked together in a y-direction 92, are arranged so as to be lined up in an x-direction 91 on a mounting frame 13, wherein the latter comprises free faces on an underside 12 (view from “below” in a z-direction 93). A path 14 leads busbars and conduits to a temperature control system, wherein the busbars and conducts are each connected to a respective battery module 11.

[0034] FIG. 2 schematically shows a perspective view of a configuration of a battery module 20 according to aspects of the invention. According to the present invention, a plurality of module degassing openings 22 are arranged on the underside, facing in the negative z-direction 94, of a module housing 21, which corresponds to a degassing side of the module housing 21.

[0035] FIG. 3 schematically shows a perspective sectional view of a further configuration of battery module 30 according to aspects of the invention. Module degassing openings 32 are arranged on the degassing side 31 of the module housing. Within the module housing, there are a plurality of battery cells 34 stacked together. Between the battery cells 34 and the module housing, there is a respective clearance, which is perfused with temperature control fluid. For example, only every other battery cell 34 is arranged exactly opposite the respective module degassing opening 32 with its cell degassing opening 33. According to the present invention, the cell degassing opening of each battery cell 34 adjacent thereto is consolidated so as to form a common degassing region 36 by means of a seal path.

[0036] FIG. 4 schematically shows a perspective sectional view of a degassing region of yet another configuration of the battery module 40 according to aspects of the invention. The degassing region 46 is formed between a bursting element 42 located at the module degassing opening and, opposite thereto, a closing cap of a cell degassing opening 43, wherein said region is delimited from the temperature control fluid by a seal 44. The temperature control fluid perfuses the clearance 45 between the degassing side 41 of the module housing and the battery cells.

[0037] FIG. 5 schematically shows a sectional view 50 of a flow region for a temperature control fluid of yet another further configuration of the battery module according to aspects of the invention. This view is desirable if the degassing side of the battery module according to aspects of the invention were to be removed from the module housing. What remains is the residual housing wall 51 and a clear view of the seals 54 and the cell degassing openings 53, as well as degassing regions 56. Indicated by means of flow direction arrows 52, 55, the temperature control fluid flows around the battery cells on their side equipped with cell degassing openings 53.

TABLE-US-00001 List of reference numbers 10 Battery system with battery modules 11 Battery module 12 Bottom of battery system 13 Mounting frame, open downwards 14 Path with temperature control fluid and busbars 20 Battery module with degassing openings 21 Module housing 22 Module degassing opening 30 Sectional view of battery module 31 Degassing side 32 Module degassing opening 33 Cell degassing opening 34 Battery cell 35 Flow space for temperature control fluid 36 Degassing region 40 Sectional view of degassing region 41 Degassing side 42 Bursting element in module degassing opening 43 Closing cap cell degassing opening 44 Seal 45 Clearance for temperature control fluid 46 Degassing region 50 Sectional view of degassing region 51 Housing wall 52 Coolant flow direction 53 Cell degassing opening 54 Seal 55 Perfused by temperature control fluid 56 Degassing region 91 x direction 92 y direction 93 z direction 94 negative z direction