Vehicle battery

Abstract

The invention relates to a vehicle battery (1), comprising a vehicle battery arrangement (3) with a plurality of battery cells (5) and a battery box (7) for receiving the battery cells (5), and provides that the battery box (7) is designed in a tub-like form and forms a lower part (8) of a battery housing (15), which also has a top part (11) that includes a circumferential rim (13) which projects from the top part (11) towards the lower part (8) and which, in a state (100) of the top part (11) placed on the lower part (8), overlaps the lower part (8) at least partially (20).

Description

[0001] The invention relates to a vehicle battery, comprising a vehicle battery arrangement with a plurality of battery cells.

[0002] From CN110246999B, a battery module is known which is composed of several individual parts.

[0003] The invention is based on the objective of providing a vehicle battery that enables a simplified manufacturing process.

[0004] The problem is solved according to the invention by a vehicle battery having the features of claim 1.

[0005] Advantageous embodiments of the invention are the subject of the dependent claims.

[0006] The vehicle battery according to the invention, comprising a vehicle battery arrangement with a plurality of battery cells and a battery box for receiving the battery cells, provides that the battery box is designed in a tub-like shape and forms a lower part of a battery housing, which also has a top part that includes a circumferential rim which projects from the top part towards the lower part and which, in a state of the top part being placed on the lower part, overlaps the lower part at least partially.

[0007] One advantage of the invention is the reduced number of individual parts required, which enables simplified manufacturing at lower costs. Additionally, the small number of parts improves repairability. A further advantage is the reduction in the required installation space.

[0008] The vehicle battery according to the invention exhibits high inherent rigidity and can be manufactured using current plant technology. Furthermore, the sealing properties of the vehicle battery have been improved.

[0009] The battery housing, consisting of an upper and lower section, can be manufactured cost-effectively using conventional production methods, such as deep drawing. This allows for flexibility in component types and materials, and also enables the use of differently manufactured upper and lower sections. The battery housing, including the vehicle battery, is particularly easy to install in a vehicle; for example, it can be inserted into a vehicle frame.

[0010] Exemplary embodiments of the invention are explained in more detail below with reference to drawings.

[0011] This shows: Fig. 1 Schematic exploded view of a vehicle battery according to the invention, Fig. 2 schematically a vehicle battery according to the invention, Fig. 3. Schematic cross-sectional view of a vehicle battery, Fig. 4. Schematic exploded view of a battery housing, Fig. 5. Schematic cross-sectional view of an exemplary joining connection of the battery housing, Fig. 6 schematically in sectional view another exemplary joining connection of the battery housing, and Fig. Figure 7 schematically shows another exemplary joining connection of the battery housing in cross-sectional view.

[0012] Corresponding parts are marked with the same reference symbols in all figures.

[0013] Fig. Figure 1 schematically shows an exploded view of a vehicle battery according to the invention.

[0014] The vehicle battery 1 comprises a vehicle battery assembly 3 and a battery box 7.

[0015] In particular, the vehicle battery 1 is a high-voltage battery, especially a traction battery, for an electric vehicle, a hybrid vehicle or a fuel cell-powered vehicle.

[0016] The vehicle battery 1 comprises, in particular, a plurality of battery cells 5. The battery cells 5 are, for example, designed as cylindrical cells or the like and are arranged, in particular, next to each other to form the vehicle battery 1 or the vehicle battery arrangement 3.

[0017] Each battery cell 5 is designed as a single electrochemical cell, for example as a lithium-ion cell or the like. The vehicle battery 1 formed from the several battery cells 5 is then, for example, designed as a lithium-ion battery or the like. Each battery cell 5 is, for example, designed as a cylindrical cell, a prismatic hard-case cell, or the like.

[0018] The battery box 7 is designed in a tray-like form. For example, the battery box 7 is designed as a lower part 8 of a battery housing 15. The battery box 7 thus functions as a housing base of the battery housing 15. The battery box 7 is specifically designed to accommodate the battery cells 5 of the vehicle battery 1.

[0019] The battery housing 15 additionally comprises a top part 11, which is, for example, designed in a trough-like form. The top part 11 is, for example, designed as a housing lid. The top part 11 comprises, in particular, a top surface 12 and a circumferential rim 13. The circumferential rim 13 is, in particular, arranged on the top surface 12 and preferably projects perpendicularly from it. The top part 11 is, for example, rigid, designed as a sheet metal part, a casting, or the like. The top part 11 can, for example, be formed in one piece or be composed of the top surface 12 and the circumferential rim 13.

[0020] The battery box 7, as the lower part 8 of the battery housing 15, has, for example, a base 9 with a surrounding wall 10. The surrounding wall 10 is, for example, arranged at an outer edge of the base 9 and completely encloses the base 9. The height of the surrounding wall 10 corresponds, in particular, at least to the height of the battery cells 5. The lower part 8 is, for example, rigid, for example, made of sheet metal, cast, or the like. The lower part 8 can, for example, be formed in one piece or be composed of the base 9 and the surrounding wall 10.

[0021] The lower part 8 and the upper part 11 can be assembled to form the battery housing 15. The upper part 11 is placed, in particular, onto the lower part 8, with the circumferential wall 10 of the lower part 8 projecting towards the upper part 11 and the circumferential edge 13 of the upper part 11 projecting towards the lower part 8. In a mounted state 100 (shown in Fig. 2 and Fig. 3) where the upper part 11 overlaps the lower part 8, at least in some areas an overlap area 20 is created (shown in Fig. 3), in which the upper part 11 overlaps the lower part 8.

[0022] The shape and / or dimensions of the upper part 11, in particular its length and width, must be at least equal to or larger than the shape and / or dimensions of the lower part 8. For example, the width and length of the lower part 8 correspond to the width and length of the ceiling surface 12. Thus, the circumferential edge 13 arranged on the ceiling surface 12 projects beyond the lower part 8. The external dimensions / shape of the lower part 8 are therefore at least as large as the internal dimensions / shape of the upper part 11.

[0023] Alternatively, the upper part 11 can be designed to be the same size as the lower part 8 in shape and / or dimensions. The lower part 8 and / or the upper part 11 must be flexible / compliant to allow for compression. This allows the lower part 8 and the upper part 11 to have an overlap area 20 when fitted together.

[0024] In Fig. Figure 2 schematically shows a vehicle battery 1 according to the invention.

[0025] The upper part 11 is in a particularly placed position 100 on the lower part 8.

[0026] The vehicle battery 1 can, for example, include a cooling arrangement (not shown in detail). The cooling arrangement is, for example, integrated into the battery housing 15, in particular into the lower part 8 and / or the upper part 11.

[0027] Additionally, the battery housing may have 15 holes, in particular drilled holes. These holes are, for example, drilled holes for battery connections and are integrated, in particular, into the lower part 8 and / or the upper part 11.

[0028] Fig. Figure 3 shows a schematic cross-sectional view of a vehicle battery 1.

[0029] The upper part 11 and the lower part 8 are connected to each other in the overlap area 20, in particular by a form-fit, force-fit, and / or material-fit connection. The upper and lower parts 11, 8 are connected to each other, in particular, by the joining connection 21. For example, the upper and lower parts 11, 8 can be welded, bonded, or the like. The upper and lower parts 11, 8 are connected to each other, in particular, circumferentially in the overlap area 20, with the joining connection 21 occurring at the overlap area 20. In the present example, the joining connection 21 is a weld, in particular a circumferential fillet weld.

[0030] In Fig. Figure 4 shows a schematic exploded view of a battery housing 15.

[0031] The base surface 9 of the lower part 8 has in particular a length l u , and a width b u The surrounding wall 10 of the lower part 8 also has a height h. u and a thickness t uThe ceiling surface 12 also has a length l o and a width b o The surrounding rim 13 has a height h o and a thickness t o .

[0032] The thick ones t u , t o For example, the width ranges from 0.4 mm to 5.0 mm. o is in particular equal to or greater than the width b u with twice the thickness t u and a specified tolerance. The length l o is in particular equal to or greater than the length l u , with twice the thickness t u and a specified tolerance. The tolerances are, for example, 0.2 mm. The height h o is in particular greater than or equal to 5.0 mm. The width b o For example, the length is between 25 cm and 3 m. o For example, it lies between 75 cm and 5 m.

[0033] Fig. Figure 5 shows a schematic cross-sectional view of an exemplary joining connection 21 of the battery housing 15. The joining connection 21 is designed here as a weld seam, in particular as a circumferential I-seam.

[0034] In Fig. Figure 6 schematically shows another exemplary joining connection 21 of the battery housing 15 in a sectional view. In this case, the joining connection 21 is specifically designed as an adhesive bond. The adhesive bond can be arranged in the overlap area 20.

[0035] Fig.Figure 7 schematically shows another exemplary joint 21 of the battery housing 15 in a sectional view. The outer wall 10 of the lower part 8 has a circumferential shoulder 10.1, particularly at one upper end. The circumferential shoulder 10.1 is, for example, arranged on the upper end of the outer wall 10. This gives the outer wall 10 an outer, circumferential projection 10.2. The upper part 11 can thus be placed onto the projection 10.2, creating a positive-locking joint 21. Additionally, an adhesive bond can be applied to the projection 10.2, resulting in a material-bonded joint 21. Reference symbol list 1 vehicle battery 3 Vehicle battery arrangement 5 battery cells 7 Battery box 8 Lower part 9 floor area 10 surrounding wall 10.1 Paragraph 10.2 lead 11 Top 12 ceiling area 13 surrounding border 15 battery cases 20 Overlap area 21 Joining connection 100 applied state l u ,l o length b u ,b o Width h u ,h o Height t u ,t o thickness QUOTES INCLUDED IN THE DESCRIPTION

[0000] This list of documents cited by the applicant was automatically generated and is included solely for the reader's convenience. The list is not part of the German patent or utility model application. The DPMA accepts no liability for any errors or omissions. Cited patent literature

[0000] CN 110246999B

[0002]

Claims

[1] Vehicle battery (1) comprising a vehicle battery assembly (3) with a plurality of battery cells (5) and a battery box (7) for receiving the battery cells (5), characterized by , that the battery box (7) is designed in a tub-like form and forms a lower part (8) of a battery housing (15), which also has an upper part (11) that includes a circumferential rim (13) which projects from the upper part (11) towards the lower part (8) and which, in a state (100) of the upper part (11) placed on the lower part (8), overlaps the lower part (8) at least partially (20). [2] Vehicle battery (1) according to claim 1, characterized by , that the shape and / or dimensions, in particular length and width, of the upper part (11) are at least as large as or larger than the shape and / or dimensions of the lower part (8). [3] Vehicle battery (1) according to claim 1 or 2, characterized by, that the upper part (11) has a ceiling surface (12) with the surrounding edge (13) and the lower part (8) has a floor surface (9) with a surrounding wall (10), wherein the height of the surrounding wall (10) corresponds at least to the height of the battery cells (5). [4] Vehicle battery (1) according to any one of the preceding claims, characterized by , that the upper part (11) and the lower part (8) are connected to each other in the overlap area (20) by a joining connection (21) in a form-fit, force-fit and / or material-fit manner. [5] Vehicle battery (1) according to any one of the preceding claims, characterized by , that the battery housing (15), in particular the upper part (11) and / or the lower part (8), includes a cooling arrangement. [6] Vehicle battery (1) according to any one of the preceding claims, characterized by , that the battery housing (15), in particular the upper part (11) and / or the lower part (8), has holes for battery connections.

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