End plate connecting structure of battery module

Abstract

The utility model discloses an end plate connecting structure of a battery module, and belongs to the technical field of battery modules. The connecting structure comprises an end plate assembly and a connecting component, the end plate assembly comprises a first end plate and a second end plate, the first end plate and the second end plate are mutually spaced, the two sides of the first end plate and the two sides of the second end plate are each provided with an extending part, and the extending parts extend towards the outer side of the first end plate or the second end plate and are perpendicular to the first end plate or the second end plate; a first fixing hole penetrating in the thickness direction of the extending part is formed in the extending part; the connecting component comprises two connecting plates, a pressing plate and a fastener, the two connecting plates are respectively arranged on two sides of the battery core group and are used for connecting the first end plate and the second end plate, and the pressing plate is arranged on one side, far away from the first end plate or the second end plate, of each connecting plate and is used for fastening the battery core group; a second fixing hole and a third fixing hole are formed in the outer side of the connecting plate and the pressing plate respectively, the fastener comprises a bolt and a nut, and the bolt sequentially penetrates through the third fixing hole, the second fixing hole and the first fixing hole and is connected with the nut. The connecting structure is simple in structure and low in operation difficulty.

Description

Technical Field

[0001] The utility model relates to the technical field of battery packs, and in particular to an end plate connection structure of a battery module. Background Art

[0002] In recent years, with the increasing demand for environmental protection and carbon dioxide emission reduction, electric vehicles have gradually gained support from people. The power source of electric vehicles is lithium batteries and other batteries. In order to improve the battery driving force of electric vehicles, battery modules with a considerable number of battery cells are usually installed on electric vehicles to provide sufficient power for electric vehicles.

[0003] A battery module is usually composed of multiple battery cells connected in series, and the battery cells are fixed by an end plate structure. A common end plate structure includes two end plates and an end plate connecting plate. The two end plates and the end plate connecting plate are generally fixed by welding. Although this structure is beneficial to increase the stability between the end plates and the end plate connecting plates, it is necessary to use tools such as clamps to align the end plates and the end plate connecting plates when performing welding connections. Therefore, the operation is more cumbersome and there is a problem of reduced productivity. Utility Model Content

[0004] In order to solve the above problems, the utility model provides an end plate connection structure of a battery module, which has a simple structure and low operation difficulty. In addition, a pressure plate is added on the outer side of the connection plate, which is conducive to improving the stability between the connection plate and the end plate, thereby increasing the stability of the overall structure.

[0005] The technical solution of the utility model is as follows:

[0006] 14. The battery module of claim 13, wherein the plurality of battery modules are connected at least one of the plurality of end plates of the battery module and the plurality of end plates are connected at least one of the plurality of end plates of the battery module. The plurality of end plates are connected at least one of the plurality of end plates of the battery module and the plurality of end plates are connected at least one of the plurality of end plates of the battery module.

[0007] Preferably, side ears are respectively provided on both sides of the connecting plate, and the side ears extend toward one side of the first end plate or the second end plate, so that the first end plate and the second end plate are arranged between the two side ears.

[0008] Furthermore, a slot is provided on a side of the extension portion away from the battery core pack, and the side ear is embedded in the slot.

[0009] Specifically, the side width of the side ear is equal to the width of the card slot.

[0010] Preferably, the card slot and the first fixing hole are both located in the middle of the extension portion, and when the side ear is embedded in the card slot, the second fixing hole overlaps or at least partially overlaps with the first fixing hole.

[0011] Preferably, the width of the connecting plate is smaller than the width of the side of the extending portion.

[0012] Preferably, the connecting plate is provided with heat dissipation holes penetrating along the thickness direction of the connecting plate.

[0013] Preferably, the second fixing hole on the connecting plate is an elongated hole.

[0014] Preferably, the pressing plate is a long strip plate, and the side width of the pressing plate is equal to the width of the connecting plate.

[0015] Specifically, the number of the third fixing hole, the second fixing hole and the first fixing hole is set to two, and the first fixing hole is located in the middle position of the extension part.

[0016] The beneficial effects of the utility model are:

[0017] An extension is provided on both sides of the first end plate and the second end plate, and the extension is connected to the connecting plate by bolts and nuts, so as to fix the battery core group between the first end plate and the second end plate. The connecting structure has a simple structure and low operation difficulty. In addition, a pressure plate is added on the outer side of the connecting plate, which is conducive to improving the stability between the connecting plate and the end plate, thereby increasing the stability of the overall structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] By reading the detailed description of the preferred embodiment below, the scheme and advantages of the present application will become clear to those skilled in the art. The accompanying drawings are only used to illustrate the preferred embodiment and are not considered to be limiting of the present invention.

[0019] In the attached picture:

[0020] Figure 1 This is a front view of the end plate connection structure of the battery module of the utility model;

[0021] Figure 2 It is a top view of the end plate connection structure of the battery module of the present invention.

[0022] The components represented by the reference numerals are:

[0023] 1. Pressing plate, 2. Connecting plate, 3. Fastener, 4. First end plate, 5. Second end plate, 6. Side ears, 7. Card slot, 8. Extension part, 9. Battery core. DETAILED DESCRIPTION

[0024] See also Figure 1 and Figure 2 The utility model provides an end plate connection structure of a battery module, including an end plate assembly and a connection member.

[0025] The end plate assembly includes a first end plate 4 and a second end plate 5. The first end plate 4 and the second end plate 5 can be flat plates, and the sizes of the first end plate 4 and the second end plate 5 are roughly the same as the sizes of the battery core. The first end plate 4 and the second end plate 5 are spaced from each other, and the space between the first end plate 4 and the second end plate 5 is sufficient to accommodate the battery core group. Extension portions 8 are respectively provided on both sides of the first end plate 4 and the second end plate 5. The extension portions 8 extend toward the outside of the first end plate 4 or the second end plate 5, and are vertically arranged to the first end plate 4 or the second end plate 5. The extension portion 8 and the corresponding end plate are an integral structure, that is, the extension portion 8 can be formed by bending both sides of the first end plate 4 or the second end plate 5 to reduce the difficulty of forming. The first end plate 4 and the second end plate 5 can be metal plates, such as aluminum plates or aluminum alloy plates, and the extension portion 8 is provided with a first fixing hole that penetrates along its own thickness direction.

[0026] The connecting component includes a connecting plate 2, a pressing plate 1 and a fastener 3, wherein there are two connecting plates 2, which are respectively arranged on both sides of the battery core group. The connecting plate 2 can be made of a metal plate, such as an aluminum plate or an aluminum alloy plate. The connecting plate 2 is used to connect the first end plate 4 and the second end plate 5. The pressing plate 1 is arranged on the side of the connecting plate 2 away from the first end plate 4 or the second end plate 5. The second fixing hole and the third fixing hole are respectively arranged on the outer side of the connecting plate 2 and the pressing plate 1. The fastener 3 includes a bolt and a nut. The bolt passes through the third fixing hole, the second fixing hole and the first fixing hole in sequence and is connected to the nut.

[0027] Specifically, the pressing plate 1 is a long strip plate, and the side width of the pressing plate 1 is equal to the width of the connecting plate 2, so as to increase the contact area between the pressing plate 1 and the connecting plate 2 and improve the stability between the two.

[0028] The extension part 8 is connected to the connecting plate 2 by bolts and nuts, thereby fixing the battery core group between the first end plate 4 and the second end plate 5. The connection structure is simple in structure and easy to operate. In addition, a pressure plate 1 is added to the outer side of the connecting plate 2, which is conducive to improving the stability between the connecting plate 2 and the end plate, thereby increasing the stability of the overall structure.

[0029] Optionally, side ears 6 are respectively provided on both sides of the connecting plate 2, and the side ears 6 extend toward one side of the first end plate 4 or the second end plate 5 so as to set the first end plate 4 and the second end plate 5 between the two side ears 6. The side ears 6 limit the first end plate 4 and the second end plate 5, thereby improving the stability between the two end plates.

[0030] In addition, a slot 7 is provided on one side of the extension 8 away from the battery core pack, and the side ear 6 is embedded in the slot 7. The slot 7 is used to position the side ear 6, so as to facilitate the connection between the side ear 6 and the extension 8. Therefore, the side width of the side ear 6 is equal to the width of the slot 7, so that the side ear 6 is just embedded in the slot 7.

[0031] It should be noted that the slot 7 is also used to position the first fixing hole and the second fixing hole to facilitate the connection of the bolts with the first fixing hole and the second fixing hole and improve the assembly speed. The slot 7 and the first fixing hole are both located in the middle position of the extension part 8. When the side ear 6 is embedded in the slot 7, the second fixing hole and the first fixing hole overlap or at least partially overlap.

[0032] In addition, in order to further facilitate the matching between the second fixing hole and the first fixing hole and the third fixing hole, the second fixing hole on the connecting plate 2 is a long strip hole.

[0033] In one embodiment, the width of the connecting plate 2 is smaller than the width of the side of the extending portion 8 to save materials and reduce production costs.

[0034] Optionally, the connecting plate 2 is provided with heat dissipation holes penetrating along the thickness direction thereof, so as to increase the heat dissipation channel of the battery core pack and improve its heat dissipation performance.

[0035] Optionally, in order to improve the stability between the connecting plate 2 , the pressing plate 1 and the end plate, the number of the third fixing hole, the second fixing hole and the first fixing hole are all set to two, and the first fixing hole is located in the middle position of the extension portion 8 .

[0036] The above are only preferred implementations of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An end plate connection structure of a battery module, characterized in that: include: An end plate assembly, comprising a first end plate and a second end plate, the first end plate and the second end plate are spaced apart from each other, the first end plate and the second end plate are used to accommodate a battery core group, both sides of the first end plate and the second end plate are respectively provided with extension parts, the extension parts extend toward the outside of the first end plate or the second end plate, and are arranged perpendicularly to the first end plate or the second end plate, and the extension parts are provided with a first fixing hole penetrating along the thickness direction thereof; A connecting component includes a connecting plate, a pressing plate and a fastener, wherein the number of the connecting plates is two and they are respectively arranged on both sides of the battery core group, the connecting plate is used to connect the first end plate and the second end plate, the pressing plate is arranged on the side of the connecting plate away from the first end plate or the second end plate, and a second fixing hole and a third fixing hole are respectively arranged on the outer side of the connecting plate and the pressing plate, and the fastener includes a bolt and a nut, and the bolt passes through the third fixing hole, the second fixing hole and the first fixing hole in sequence and is connected to the nut.

2. The end plate connection structure of the battery module according to claim 1, characterized in that: Side ears are respectively arranged on both sides of the connecting plate, and the side ears extend toward one side of the first end plate or the second end plate, so that the first end plate and the second end plate are arranged between the two side ears.

3. The end plate connection structure of the battery module according to claim 2, characterized in that: A slot is provided on a side of the extension portion away from the battery core pack, and the side ear is embedded in the slot.

4. The end plate connection structure of the battery module according to claim 3, characterized in that: The side width of the side ear is equal to the width of the card slot.

5. The end plate connection structure of the battery module according to claim 3, characterized in that: The card slot and the first fixing hole are both located in the middle of the extension portion. When the side ear is embedded in the card slot, the second fixing hole overlaps with the first fixing hole or at least partially overlaps with it.

6. The end plate connection structure of the battery module according to claim 1, characterized in that: The number of the third fixing hole, the second fixing hole and the first fixing hole are all set to two, and the first fixing hole is located in the middle position of the extension part.

7. The end plate connection structure of the battery module according to claim 1, characterized in that: The second fixing hole on the connecting plate is an elongated hole.

8. The end plate connection structure of the battery module according to claim 1, characterized in that: The width of the connecting plate is smaller than the width of the side of the extending portion.

9. The end plate connection structure of the battery module according to claim 1, characterized in that: The pressing plate is a long strip plate, and the side width of the pressing plate is equal to the width of the connecting plate.

10. The end plate connection structure of the battery module according to claim 1, characterized in that: The connecting plate is provided with heat dissipation holes penetrating along the thickness direction of the connecting plate.

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