Battery assembly and method for manufacturing a battery assembly

Abstract

The invention relates to a battery assembly (1), in particular for motor vehicles, comprising a battery housing (2) and a battery cell (3), wherein the battery housing (2) has a surrounding wall (4) on at least four sides, the surrounding wall enclosing an inner space (6) of the battery housing (2), wherein the battery housing (2) also has a partition plate (7), which divides the inner space (6) into two chambers (8), wherein the battery housing (2) has a preferred direction (99), along which the surrounding wall (4) and the partition plate (7) extend, wherein the battery cell (3) is arranged in the two chambers (8), wherein the battery housing (2) is composed of a profile element (9) with a T-shaped cross section and two profile elements (10) with an L-shaped cross section, whereby the profile elements (9, 10) form the surrounding wall (4) and the partition plate (7).

Description

Technical Field

[0001] The invention relates to a battery assembly, in particular for a motor vehicle, and to a method for producing a battery assembly. Background Art

[0002] Battery assemblies are known in various ways in the prior art, for example DE 102018 103 713 A1, US 2017 / 0365888 A1 or WO 2019 / 206409 A1. In battery assemblies that can be used individually or multiple times in vehicle batteries, the issues of efficient assembly and the safety of the battery cells that are subject to forces in the event of an accident, etc. are of great importance. In this respect, the battery assemblies known in the prior art still have shortcomings. Summary of the invention

[0003] The object of the present invention is to provide a battery assembly which is easy to manufacture and is safe with respect to external forces. It is also an object to provide a method for manufacturing a battery assembly, whereby the battery assembly can be manufactured easily and cost-effectively.

[0004] The objectives of the battery assembly are achieved by the following features.

[0005] An embodiment of the invention relates to a battery assembly, in particular for a motor vehicle, having a battery housing and a battery cell, wherein the battery housing has a surrounding wall at least on four sides, the surrounding wall enclosing an interior space of the battery housing, wherein the battery housing also has a partition plate, which divides the interior space into two chambers, wherein the battery housing has a preferred direction, along which the surrounding wall and the partition plate extend, wherein the battery cell is arranged in the two chambers, wherein the battery housing is composed of a profile element with a T-shaped cross section and two profile elements with an L-shaped cross section, so that the profile elements form the surrounding wall and the partition plate. As a result, the battery assembly with the battery cell and the battery housing can be easily assembled and a stable structure can still be provided, which protects the battery cell in the event of external forces.

[0006] In another embodiment, it is convenient that the battery housing has two opposing first side walls and two opposing second side walls, wherein the first side walls are arranged at right angles to the second side walls, and wherein the partition plate is arranged parallel to the two second side walls and at right angles to the first side walls. This achieves a stable structure that safely protects the battery cells arranged in the interior space.

[0007] It is also convenient that the profile element with a T-shaped cross section forms the first side wall and the partition, and the two profile elements with an L-shaped cross section each form the second side wall and together form the first side wall. Thus, a stable structure can be provided, which is simply composed of three main parts and optionally other auxiliary elements.

[0008] It is also convenient that the profile element with a T-shaped cross section has a first web and a second web protruding centrally from the first web, wherein a third web is optionally arranged at the end of the second web, and the second connecting web is centrally located on the third web. The third web ensures good connectability of the T-shaped profile. In particular, the third web is significantly shorter in length than the first web forming the side wall.

[0009] It is also advantageous if the profile elements with an L-shaped cross section are arranged mirror-symmetrically to one another and each have a fourth web and a fifth web extending at right angles thereto, wherein a sixth web optionally extends from the end side of the fifth web. The sixth web here extends from the fifth web parallel to the fourth web and preferably serves to improve the connectability of the profile elements. The sixth web is here significantly shorter than the fourth web, which essentially forms half of the side wall.

[0010] It is also advantageous if the third support plate is connected together with the fourth support plate in a sealing manner and the sixth support plate is correspondingly connected to the first support plate in a sealing manner. This makes it possible to form a sealed battery housing which can optionally be closed at the end with one battery housing cover or two battery housing covers.

[0011] The objects concerning the method are achieved by the following features.

[0012] An embodiment of the present invention relates to a method for manufacturing a battery assembly, in particular according to the above-mentioned features, wherein a battery assembly, in particular for a motor vehicle, is assembled, the battery assembly having a battery housing and a battery cell, wherein the battery housing has a surrounding wall on at least four sides, the surrounding wall enclosing an interior space of the battery housing, wherein the battery housing also has a partition plate, which divides the interior space into two chambers, wherein the battery housing has a preferred direction, the surrounding wall and the partition plate extend along the preferred direction, wherein the battery cell is arranged in the two chambers, wherein the battery housing is composed of a profile element with a T-shaped cross-section and two profile elements with an L-shaped cross-section, whereby the profile elements form the surrounding wall and the partition plate.

[0013] Advantageously, the production is carried out in the following steps:

[0014] - providing two profile elements having an L-shaped cross section,

[0015] - optionally applying a gap-filling material to the support plates of the corresponding L-shaped profile elements,

[0016] - placing the rows of battery cells on corresponding gap-filling materials and / or L-shaped profile elements,

[0017] - providing connection areas between rows of battery cells,

[0018] - placing and connecting corresponding electrical connecting elements for connecting the battery cells of the corresponding L-shaped profile elements,

[0019] - optionally applying a gap-filling material to the connecting element,

[0020] - providing a T-shaped profile element between the two L-shaped profile elements,

[0021] - Pushing together the two L-shaped profile elements with the battery cells and the T-shaped profile element arranged therebetween,

[0022] - hold down profile elements, and

[0023] - Joining the interfaces between the profile elements.

[0024] This simplifies the production of the battery assembly, since the battery cells can be easily and safely placed on the L-shaped profile element, and the battery housing can then be formed and closed by joining the profile elements together. This results in a stable structure that is very stable, especially in the longitudinal direction of the profile element.

[0025] It is particularly advantageous if the joining is carried out by gluing and / or welding, thereby making it possible to provide a stable and also leak-tight connection.

[0026] It is also advantageous to place at least one battery housing cover on the end side of the battery housing, in particular to place two battery housing covers on both end sides. This makes it possible, on the one hand, to provide an electrical connection and / or a fluid connection in order to temperature-control the battery assembly with a fluid. Alternatively, the electrical connection and / or the fluid connection can also be realized, for example, on the side wall.

[0027] In general, the present invention discloses the following technical solutions 1 and 7, and the following 2-6 and 8-10 are preferred technical solutions:

[0028] 1. A battery assembly (1) particularly for a motor vehicle, comprising a battery housing (2) and a battery cell (3), wherein the battery housing (2) comprises a wall (4) surrounding at least four sides, the surrounding wall enclosing an inner space (6) of the battery housing (2), wherein the battery housing (2) further comprises a partition plate (7), which divides the inner space (6) into two chambers (8), wherein the battery housing (2) has a preferred direction (99), the surrounding wall (4) and the partition plate (7) extending along the preferred direction, wherein the battery cell (3) is arranged in the two chambers (8), wherein the battery housing (2) is composed of a profile element (9) having a T-shaped cross section and two profile elements (10) having an L-shaped cross section, whereby the profile elements (9, 10) form the surrounding wall (4) and the partition plate (7).

[0029] 2. The battery assembly (1) according to the aforementioned 1 is characterized in that the battery housing (2) has two opposite first side walls (11) and two opposite second side walls (12), wherein the first side wall (11) is arranged at right angles to the second side wall (12), and wherein the partition plate (7) is arranged parallel to the two second side walls (12) and at right angles to the first side wall (11).

[0030] 3. The battery assembly (1) according to the aforementioned 2 is characterized in that the profile element (9) with a T-shaped cross-section forms the first side wall (11) and the partition plate (7), and the two profile elements (10) with an L-shaped cross-section each form a second side wall (12) and together form the first side wall (11).

[0031] 4. The battery assembly (1) according to 1, 2 or 3 above, characterized in that the profile element (9) with a T-shaped cross-section has a first support plate (13) and a second support plate (14) extending centrally from the first support plate, wherein a third support plate (15) is optionally arranged on the end side of the second support plate (14), and the second support plate (14) is centrally located on the third support plate as a partition plate (7).

[0032] 5. The battery assembly (1) according to the above 1, 2, 3 or 4 is characterized in that the profile elements (10) with L-shaped cross-sections are arranged in a mirror-symmetrical manner to each other and each has a fourth support plate (16) and a fifth support plate (17) extending at a right angle to the fourth support plate, wherein a sixth support plate (18) is optionally extended from the end side of the fifth support plate (17).

[0033] 6. The battery assembly (1) according to the above 5 is characterized in that the third support plate (15) is sealedly connected (19) with the fourth support plate (16), and the sixth support plate (18) is sealedly connected (20) with the first support plate (13) accordingly.

[0034] 7. A method for manufacturing a battery assembly (1), in particular according to any one of 1 to 6 above, wherein a battery assembly (1), in particular for a motor vehicle, is assembled, the battery assembly having a battery housing (2) and a battery cell (3), wherein the battery housing (2) has a wall (4) surrounding at least on four sides, the surrounding wall enclosing an inner space (6) of the battery housing (2), wherein the battery housing (2) also has a partition plate (7), which divides the inner space (6) into two chambers (8), wherein the battery housing (2) has a preferred direction (99), the surrounding wall (4) and the partition plate (7) extend along the preferred direction, wherein the battery cell (3) is arranged in the two chambers (8), wherein the battery housing (2) is composed of a profile element (9) with a T-shaped cross-section and two profile elements (10) with an L-shaped cross-section, whereby the profile elements (9, 10) form the surrounding wall (4) and the partition plate (7).

[0035] 8. The method according to item 7 above is characterized in that the manufacturing is carried out in the following steps:

[0036] - providing two profile elements (10) having an L-shaped cross section,

[0037] - optionally applying a gap-filling material (22) to the support (16) of the respective L-shaped profile element (10),

[0038] - placing rows (23) of battery cells (3) on the corresponding gap-filling material (22) and / or the L-shaped profile element (10),

[0039] - connecting areas (24) are provided between the rows (23) of battery cells (3),

[0040] - placing and connecting corresponding electrical connection elements (25) for connecting the battery cells (3) of the corresponding L-shaped profile elements (10),

[0041] - optionally applying a gap-filling material (22) to the connecting element (25),

[0042] - providing the T-shaped profile element (9) between the two L-shaped profile elements (10),

[0043] - pushing the two L-shaped profile elements (10) with the battery cells (3) together with the T-shaped profile element (9) arranged therebetween,

[0044] - compressing the profile elements (9, 10), and

[0045] - joining the interface between the profile elements (9, 10).

[0046] 9. The method according to item 8 above, characterized in that the joining is performed by bonding and / or welding.

[0047] 10. The method according to the above 8 or 9, characterized in that at least one battery housing cover (5) is placed on the end side of the battery housing (2). BRIEF DESCRIPTION OF THE DRAWINGS

[0048] The present invention will be described in detail below with reference to the accompanying drawings using embodiments. In the accompanying drawings:

[0049] Figure 1 A schematic diagram showing an embodiment of a battery cell assembly according to the present invention,

[0050] Figure 2 Show according to Figure 1 Schematic diagram of the battery housing,

[0051] Figure 3 Show according to Figure 2 Schematic detail of a battery housing,

[0052] Figure 4 shows a schematic diagram for explaining the manufacture of a battery assembly,

[0053] Figure 5 shows a schematic diagram for explaining the manufacture of a battery assembly,

[0054] Figure 6 shows a schematic diagram for explaining the manufacture of a battery assembly,

[0055] Figure 7 shows a schematic diagram for explaining the manufacture of a battery assembly,

[0056] Figure 8 shows a schematic diagram for illustrating the manufacture of a battery assembly, and

[0057] Fig. 9 A schematic diagram is shown for explaining the connection of profile elements. DETAILED DESCRIPTION

[0058] Figures 1 to 3Different schematic diagrams show an exemplary embodiment of a battery assembly 1 according to the invention, which can be used in particular as a module for a traction battery of a motor vehicle or alternatively also as a battery for a motor vehicle, for example a traction battery. Figures 4 to 9 It is used to explain the manufacturing method of the battery assembly 1 according to the concept of the present invention.

[0059] Figures 1 to 3 An exemplary embodiment of a battery assembly 1 is shown, which is equipped with a battery housing 2 and battery cells 3 arranged therein.

[0060] The battery housing 2 has a wall 4 which circumferentially extends at least on four sides and can be closed at the end, for example, by means of a battery housing cover 5. The wall 4 encloses an interior 6 of the battery housing 2. The battery cells 3 are arranged in the interior 6 of the battery housing 2.

[0061] The battery housing 2 has a partition wall 7 which divides the interior 6 of the battery housing 2 into two chambers 8 .

[0062] The battery housing 2 has a preferred direction 99 , which is, for example, the longitudinal direction of the battery housing 2 . The surrounding wall 4 and the partition 7 extend along this preferred direction 99 .

[0063] Figure 1 It is shown that the battery cells 3 are arranged in the two chambers 8 .

[0064] According to the embodiment of the present invention, the battery housing 2 is composed of a profile element 9 with a T-shaped cross section and two profile elements 10 with an L-shaped cross section, so that the profile elements 9 , 10 form the surrounding wall 4 and the partition 7 .

[0065] The battery housing 2 has two opposing first side walls 11 and two opposing second side walls 12 , wherein the first side wall 11 is arranged at right angles to the second side walls 12 , and wherein the partition plate 7 is arranged parallel to the two second side walls 12 and at right angles to the first side wall 11 .

[0066] Figures 1 to 3 It is shown that the profile element 9 with a T-shaped cross section forms the first side wall 11 and the partition 7 , and the two profile elements 10 with an L-shaped cross section each form a second side wall 12 and together form the first side wall 11 .

[0067] The profile element 9, which is T-shaped in cross section, has a first support plate 13 and a second support plate 14 extending centrally therefrom, wherein a third support plate 15 is optionally arranged at the end of the second support plate 14, on which the second support plate 14 is centrally located as a partition plate 7, see also Fig. 9 .

[0068] The profile elements 10 with an L-shaped cross section are arranged mirror-symmetrically to one another, see Figure 3 The profile elements each have a fourth web 16 and a fifth web 17 projecting at a right angle thereto, wherein a sixth web 18 optionally projects from the end face of the fifth web 17 .

[0069] Here, the third support plate 15 is connected to the fourth support plate 16 in a sealed connection 19 and / or the sixth support plate 18 is connected to the first support plate 13 in a sealed connection 20, see also Fig. 9 In order not to increase the wall thickness of the wall 4 in the region of the connections 19 , 20 , the webs 13 , 18 , 15 and 16 have chamfers 21 at which the respective wall thickness of the webs 13 to 18 is reduced relative to the normal wall thickness of the webs 13 to 18 .

[0070] The connection 19 , 20 can preferably be, for example, an adhesive connection or a welded connection, ie, in particular a materially bonded connection. Alternatively or additionally, a positively locking connection can also be provided.

[0071] According to the method for manufacturing a battery assembly 1 of the present invention, a battery housing 2 is equipped with a battery cell 3. Here, the battery housing 2 is composed of a profile element 9 with a T-shaped cross section and two profile elements 10 with an L-shaped cross section and is equipped with a battery cell. Figures 4 to 9 .

[0072] The manufacturing method provides the following steps:

[0073] Two L-shaped profile elements 10 are provided (see Figure 4 ), wherein a gap-filling material 22, a so-called gap filler, is optionally applied to the support plate 16 of the profile element 10. The rows 23 of battery cells 3 are then placed on the corresponding gap-filling material 22 and / or the L-shaped profile element 10. Figure 4 Furthermore, connection regions 24 are provided between the rows 23 of battery cells 3 .

[0074] In this case, preferably several, in this case four, battery cells 3 of a row 23 are respectively bonded to one another by means of so-called compression mats and placed on the L-shaped profile element 10 .

[0075] exist Figure 5 In the embodiment, corresponding electrical connection elements 25, such as busbars (especially including venting channels), are placed and connected to connect the battery cells 3 of the corresponding L-shaped profile elements 10. For example, fastening and connection can be performed by means of welding.

[0076] according to Figure 6 , a gap-filling material 22 may then optionally be applied to the connecting element 25 .

[0077] according to Figure 7 , according to Figures 4 to 6 After the L-shaped profile element 10 is formed twice, a T-shaped profile element 9 is provided between the two L-shaped profile elements 10 with the battery cells 3 .

[0078] Subsequently, the two L-shaped profile elements 10 with the battery cells 3 are pushed together with the T-shaped profile element 9 arranged therebetween, see Figure 8 Subsequently, the profile elements 9, 10 are pressed together and the interface between the profile elements 9, 10 is joined, see Fig. 9 .

[0079] Advantageously, the joining is carried out in a materially and / or form-fitting manner, for example by gluing and / or welding.

[0080] Subsequently, at least one battery housing cover 5 or two battery housing covers 5 can be placed on the end side of the battery housing 2, see also Figure 1 .

[0081] Figure 1 It is also shown that a connection 26 is arranged in the side wall 11 .

[0082] List of Reference Numerals

[0083] 1 Battery Pack

[0084] 2 Battery housing

[0085] 3 Battery Cells

[0086] 4 walls

[0087] 5 Battery housing cover

[0088] 6. Internal Space

[0089] 7 Divider

[0090] 8 Chamber

[0091] 9 T-shaped profile elements

[0092] 10 L-shaped profile elements

[0093] 11 First side wall

[0094] 12 Second side wall

[0095] 13 First board

[0096] 14 Second board

[0097] 15 The third board

[0098] 16 The fourth board

[0099] 17 Fifth Board

[0100] 18 Sixth board

[0101] 19 Connect

[0102] 20 Connections

[0103] 21 Chamfer

[0104] 22 Materials

[0105] 23 rows

[0106] 24 Connection Area

[0107] 25 Connecting elements

[0108] 26 Connection terminal

[0109] 99 Preferred direction

Claims

1. A battery assembly (1) for a motor vehicle, the battery assembly comprising a battery housing (2) and a battery cell (3), wherein the battery housing (2) has a wall (4) surrounding at least on four sides, the surrounding wall enclosing an inner space (6) of the battery housing (2), wherein the battery housing (2) also has a partition plate (7), the partition plate dividing the inner space (6) into two chambers (8), wherein the battery housing (2) has a preferred direction (99), the surrounding wall (4) and the partition plate (7) extend along the preferred direction, wherein the battery cell (3) is arranged in the preferred direction The battery housing (2) is formed by connecting a profile element (9) with a T-shaped cross section and two profile elements (10) with an L-shaped cross section, whereby the profile elements (9, 10) form the surrounding wall (4) and the partition plate (7), wherein the profile element (9) with a T-shaped cross section has a first support plate (13) and a second support plate (14) extending centrally from the first support plate, wherein a third support plate (15) is optionally arranged on the end side of the second support plate (14), and the second support plate (14) is centrally located on the third support plate as a partition plate (7).

2. The battery assembly (1) according to claim 1, characterized in that: The battery housing (2) has two opposite first side walls (11) and two opposite second side walls (12), wherein the first side walls (11) are arranged at right angles to the second side walls (12), and wherein the partition plate (7) is arranged parallel to the two second side walls (12) and at right angles to the first side walls (11).

3. The battery assembly (1) according to claim 2, characterized in that: The profile element (9) with a T-shaped cross section forms a first side wall (11) and the partition plate (7), and the two profile elements (10) with an L-shaped cross section each form a second side wall (12) and together form the first side wall (11).

4. The battery assembly (1) according to claim 1, 2 or 3, characterized in that: The profile elements (10) with L-shaped cross sections are arranged mirror-symmetrically to each other and each have a fourth support plate (16) and a fifth support plate (17) extending at a right angle to the fourth support plate, wherein a sixth support plate (18) optionally extends from the end side of the fifth support plate (17).

5. The battery assembly (1) according to claim 4, characterized in that: The third support plate (15) is sealedly connected (19) with the fourth support plate (16), and the sixth support plate (18) is sealedly connected (20) with the first support plate (13) accordingly.

6. A method for manufacturing a battery assembly (1) according to any one of the preceding claims, wherein a battery assembly (1) for a motor vehicle is assembled, the battery assembly having a battery housing (2) and a battery cell (3), wherein the battery housing (2) has a wall (4) surrounding at least on four sides, the surrounding wall enclosing an inner space (6) of the battery housing (2), wherein the battery housing (2) also has a partition plate (7), the partition plate divides the inner space (6) into two chambers (8), wherein the battery housing (2) has a preferred direction (99), the surrounding wall (4) and the partition plate (7) are arranged along the preferred direction. The battery housing (2) is formed by connecting a profile element (9) with a T-shaped cross section and two profile elements (10) with an L-shaped cross section, whereby the profile elements (9, 10) form the surrounding wall (4) and the partition plate (7), wherein the profile element (9) with a T-shaped cross section has a first support plate (13) and a second support plate (14) extending centrally from the first support plate, wherein a third support plate (15) is optionally arranged on the end side of the second support plate (14), and the second support plate (14) is centrally located on the third support plate as a partition plate (7).

7. The method according to claim 6, characterized in that The manufacturing process is as follows: - providing two profile elements (10) having an L-shaped cross section, - optionally applying a gap-filling material (22) to the fourth leg (16) of the respective L-shaped profile element (10), - placing rows (23) of battery cells (3) on the corresponding gap-filling material (22) and / or the L-shaped profile element (10), - connecting areas (24) are provided between the rows (23) of battery cells (3), - placing and connecting corresponding electrical connection elements (25) for connecting the battery cells (3) of the corresponding L-shaped profile elements (10), - optionally applying a gap-filling material (22) to the connecting element (25), - providing the T-shaped profile element (9) between the two L-shaped profile elements (10), - pushing the two L-shaped profile elements (10) with the battery cells (3) together with the T-shaped profile element (9) arranged therebetween, - compressing the profile elements (9, 10), and - Joining the interface between the profile elements (9, 10).

8. The method according to claim 7, characterized in that The joining is performed by bonding and / or welding.

9. The method according to claim 7 or 8, characterized in that: At least one battery housing cover (5) is placed on the end side of the battery housing (2).

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