Battery pack housing and battery pack

Abstract

The embodiment of the utility model provides a battery pack housing and a battery pack, which relates to the field of battery technology. The battery pack housing includes a lower housing, a crossbeam and a first end plate, the crossbeam is welded to the inner side of the lower housing, the first end plate is welded to the inner side of the lower housing, the first end plate and the crossbeam are spaced apart, and the first end plate and the crossbeam are directly welded to the inner side of the lower housing by welding, which replaces the bolt connection method used in the prior art, reduces the installation time of the battery pack housing, and improves the installation efficiency of the end plate and the crossbeam.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and in particular to a battery pack shell and a battery pack. Background Art

[0002] The end plate on the lower shell of the existing battery pack or the cross beam in the middle of the lower shell needs to be fixed to the lower shell by bolt connection, resulting in low installation efficiency of the end plate or the cross beam. Utility Model Content

[0003] The utility model provides a battery pack shell and a battery pack, which can improve the installation efficiency of end plates and cross beams.

[0004] The embodiments of the present invention can be implemented as follows:

[0005] The utility model provides a battery pack housing, comprising:

[0006] Lower housing;

[0007] a cross beam welded to the inner side of the lower shell; and

[0008] A first end plate is welded to the inner side of the lower shell, and the first end plate and the cross beam are spaced apart.

[0009] In an optional embodiment, the battery pack shell further includes a second end plate, the second end plate is welded to the inner side of the lower shell, the second end plate and the cross beam are spaced apart, and the cross beam is located between the first end plate and the second end plate.

[0010] In an optional embodiment, the first end plate, the cross beam and the second end plate are sequentially distributed in parallel.

[0011] In an optional embodiment, the battery pack housing further includes a liquid cooling pipeline, the liquid cooling pipeline includes a first cooling pipeline and a second cooling pipeline, and the first cooling pipeline and the second cooling pipeline are both arranged in the lower housing;

[0012] Wherein, the first cooling pipeline is arranged between the first end plate and the cross beam, and the second cooling pipeline is arranged between the second end plate and the cross beam.

[0013] In an optional embodiment, the liquid cooling pipeline also includes a first liquid inlet and outlet pipe and a second liquid inlet and outlet pipe, the first liquid inlet and outlet pipe, the first cooling pipeline, the second cooling pipe and the second liquid inlet and outlet pipe are connected in sequence, and the lower shell has a front end and a rear end, wherein the first liquid inlet and outlet pipe and the second liquid inlet and outlet pipe are arranged at the front end.

[0014] In an optional embodiment, the material of the first inlet and outlet liquid pipe and the material of the second inlet and outlet liquid pipe are aluminum, the crossbeam is located between the front end and the rear end, the first end plate is close to the front end relative to the crossbeam, and the second end plate is close to the rear end relative to the crossbeam.

[0015] In an optional embodiment, the material of the first end plate, the material of the crossbeam, and the material of the second end plate are all steel.

[0016] In a second aspect, the utility model provides a battery pack, comprising a plurality of batteries and a battery pack shell as described in any one of the aforementioned embodiments, wherein the plurality of batteries are arranged in the lower shell.

[0017] In an optional embodiment, the battery pack further includes an extrusion plate, the extrusion plate having a guide slope, the guide slope being used for slidingly abutting against the first end plate, and the extrusion plate is disposed between the battery and the first end plate.

[0018] In an optional embodiment, the battery pack further comprises a foam layer, and the foam layer is provided between at least some of the adjacent batteries.

[0019] The battery pack housing and the battery pack of the present utility model have the following beneficial effects, for example:

[0020] The utility model provides a battery pack shell, which includes a lower shell, a cross beam and a first end plate, the cross beam is welded to the inner side of the lower shell, the first end plate is welded to the inner side of the lower shell, and the first end plate and the cross beam are distributed at intervals. Since the first end plate and the cross beam are directly welded to the inner side of the lower shell by welding, it replaces the bolt connection method used in the prior art, reduces the installation time of the battery pack shell, and improves the installation efficiency of the end plate and the cross beam.

[0021] The utility model provides a battery pack, which comprises a plurality of batteries and the above-mentioned battery pack shell. The plurality of batteries are arranged in a lower shell. The battery pack has all the functions of the above-mentioned battery pack shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 A schematic diagram of a battery pack provided in an embodiment of the present utility model;

[0024] Figure 2 A schematic diagram of a battery pack housing and an extruded plate provided in an embodiment of the present utility model;

[0025] Figure 3 It is a partial cross-sectional view of a battery pack provided in an embodiment of the present utility model.

[0026] Icon: 100-lower shell; 110-front end; 120-rear end; 200-crossbeam; 300-first end plate; 400-second end plate; 510-first cooling pipeline; 520-second cooling pipeline; 530-first inlet and outlet pipes; 540-second inlet and outlet pipes; 10-battery; 20-foam layer; 30-extrusion plate; 31-guide ramp. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Generally, the components of the embodiments of the utility model described and shown in the drawings here can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0029] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0030] In the description of the present utility model, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear, the orientation or position relationship indicated is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the utility model product is usually placed when used. It is only for the convenience of describing the utility model and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present utility model.

[0031] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0032] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0033] A battery is a cup, tank or other container or part of a composite container that contains an electrolyte solution and metal electrodes to generate an electric current. It is a device that can convert chemical energy into electrical energy. It has a positive electrode and a negative electrode. The performance parameters of a battery mainly include electromotive force, capacity, specific energy and resistance.

[0034] As mentioned in the background art, the end plate on the lower shell of the existing battery pack or the crossbeam in the middle of the lower shell needs to be fixed to the lower shell by bolt connection, resulting in low installation efficiency of the end plate or the crossbeam.

[0035] At the same time, since the end plates on the lower shell of the existing battery pack or the crossbeam in the middle of the lower shell are made of aluminum, the manufacturing cost is high. In addition, some pipelines of the existing battery pack liquid cooling system require the use of hoses, which are costly and have low installation efficiency.

[0036] In view of this, please refer to Figure 1-Figure 3 , among which, in Figure 2 In order to facilitate the description of the structure of the battery pack shell, the battery 10 and the foam layer 20 are hidden. The battery pack shell and the battery pack provided in the embodiment of the utility model can solve this problem, which will be described in detail below.

[0037] A battery pack is provided in an embodiment of the present invention. The battery pack includes a plurality of batteries 10 and a battery pack housing. The plurality of batteries 10 are disposed in a lower housing 100 of the battery pack housing.

[0038] Specifically, the battery pack shell includes a lower shell 100, a crossbeam 200 and a first end plate 300, the crossbeam 200 is welded to the inner side of the lower shell 100, the first end plate 300 is welded to the inner side of the lower shell 100, and the first end plate 300 and the crossbeam 200 are distributed at intervals.

[0039] Since the first end plate 300 and the cross beam 200 are directly welded to the inner side of the lower shell 100 by welding, instead of the bolt connection method used in the prior art, the installation time of the battery pack shell is reduced and the installation efficiency of the end plate and the cross beam 200 is improved.

[0040] Among them, in this embodiment, the crossbeam 200 is located in the middle area of ​​the lower shell 100, and the battery pack shell also includes a second end plate 400. The second end plate 400 is welded to the inner side of the lower shell 100 to replace the existing bolt connection method to reduce installation time. The second end plate 400 and the crossbeam 200 are distributed at intervals, and the crossbeam 200 is located between the first end plate 300 and the second end plate 400.

[0041] In this embodiment, the first end plate 300 , the cross beam 200 and the second end plate 400 are sequentially distributed in parallel.

[0042] In this way, the lower shell 100 is divided into two battery 10 areas by the cross beam 200, and a plurality of batteries 10 are arranged in an array in each battery 10 area. In addition, in this embodiment, the material of the first end plate 300, the material of the cross beam 200 and the material of the second end plate 400 are all steel, which is equivalent to that the first end plate 300, the cross beam 200 and the second end plate 400 are all steel sheet metal parts to reduce material costs.

[0043] In order to facilitate cooling of the battery 10 , in the present embodiment, the battery pack shell further includes a liquid cooling pipeline, the liquid cooling pipeline includes a first cooling pipeline 510 and a second cooling pipeline 520 , and the first cooling pipeline 510 and the second cooling pipeline 520 are both arranged in the lower shell 100 .

[0044] Among them, the first cooling pipe 510 is arranged between the first end plate 300 and the cross beam 200 to cool the multiple batteries 10 between the first end plate 300 and the cross beam 200, and the second cooling pipe 520 is arranged between the second end plate 400 and the cross beam 200 to cool the multiple batteries 10 between the second end plate 400 and the cross beam 200.

[0045] It should be noted that since the crossbeam 200 is directly welded to the lower shell 100, it is not convenient for the liquid cooling flat tube to directly pass through the crossbeam 200. Therefore, the first cooling pipeline 510 and the second cooling pipeline 520 in this embodiment are separated by the crossbeam 200, and the conduit of the first cooling pipeline 510 and the conduit of the second cooling pipeline 520 are respectively arranged on opposite sides of the crossbeam 200.

[0046] In addition, it should be noted that the liquid cooling pipeline also includes a first liquid inlet and outlet pipe 530 and a second liquid inlet and outlet pipe 540. The first liquid inlet and outlet pipe 530, the first cooling pipeline 510, the second cooling pipe and the second liquid inlet and outlet pipe 540 are connected in sequence, and the lower shell 100 has a front end 110 and a rear end 120, wherein the first liquid inlet and outlet pipe 530 and the second liquid inlet and outlet pipe 540 are arranged in the middle area of ​​the front end 110.

[0047] In this embodiment, the material of the first inlet and outlet liquid pipe 530 and the material of the second inlet and outlet liquid pipe 540 are aluminum, so that the first inlet and outlet liquid pipe 530 and the second inlet and outlet liquid pipe 540 can be connected to the first cooling pipeline 510 by welding, and the first cooling pipeline 510 and the second cooling pipeline 520 can also be connected together by welding.

[0048] The crossbeam 200 is located between the front end 110 and the rear end 120 , the first end plate 300 is closer to the front end 110 relative to the crossbeam 200 , and the second end plate 400 is closer to the rear end 120 relative to the crossbeam 200 .

[0049] That is to say, in this embodiment, the liquid cooling pipeline can be understood as being connected into an integral structure by welding, without the need for hoses, thereby reducing material costs and installation time.

[0050] In addition, it should be noted that in order to protect some liquid-cooled flat tubes of the first cooling circuit 510 located between the first end plate 300 and the cross beam 200, the battery pack also includes an extrusion plate 30, which is inserted between some batteries 10 and the first end plate 300 from top to bottom after the batteries 10 are arranged between the first end plate 300 and the cross beam 200.

[0051] Among them, in order to facilitate the insertion of the extrusion plate 30 between part of the battery 10 and the first end plate 300, the extrusion plate 30 has a guide slope 31, and the guide slope 31 is used to slide against the first end plate 300. The extrusion plate 30 can be arranged between the battery 10 and the first end plate 300, and pressed against the battery 10. It should be noted that an epoxy plate can also be arranged on the side of the battery 10 close to the extrusion plate 30, that is, the epoxy plate is located between the battery 10 closest to the extrusion plate 30 and the extrusion plate 30.

[0052] In addition, the battery pack also includes a foam layer 20. The number of foam layers 20 is multiple. A foam layer 20 is provided between at least some adjacent batteries 10. A foam layer 20 may be provided between all adjacent batteries 10, or a foam layer 20 may be provided between adjacent batteries 10 located between the first end plate 300 and the cross beam 200. The foam layer 20 can provide buffering and protection for the batteries 10.

[0053] To summarize, the battery pack shell includes a lower shell 100, a cross beam 200 and a first end plate 300. The cross beam 200 is welded to the inner side of the lower shell 100, the first end plate 300 is welded to the inner side of the lower shell 100, and the first end plate 300 and the cross beam 200 are spaced apart. Since the first end plate 300 and the cross beam 200 are directly welded to the inner side of the lower shell 100 by welding, it replaces the bolt connection method used in the prior art, thereby reducing the installation time of the battery pack shell and improving the installation efficiency of the end plate and the cross beam 200.

[0054] The battery pack includes a plurality of batteries 10 and the above-mentioned battery pack housing. The plurality of batteries 10 are disposed in a lower housing 100 . The battery pack has all the functions of the above-mentioned battery pack housing.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A battery pack housing, characterized in that: include: Lower housing (100); A crossbeam (200), the crossbeam (200) being welded to the inner side of the lower shell (100); as well as A first end plate (300), wherein the first end plate (300) is welded to the inner side of the lower shell (100), and the first end plate (300) and the cross beam (200) are spaced apart.

2. The battery pack housing according to claim 1, characterized in that: The battery pack shell further includes a second end plate (400), the second end plate (400) is welded to the inner side of the lower shell (100), the second end plate (400) and the crossbeam (200) are spaced apart, and the crossbeam (200) is located between the first end plate (300) and the second end plate (400).

3. The battery pack housing according to claim 2, characterized in that: The first end plate (300), the cross beam (200) and the second end plate (400) are sequentially distributed in parallel.

4. The battery pack housing according to claim 2, characterized in that: The battery pack housing further comprises a liquid cooling pipeline, the liquid cooling pipeline comprising a first cooling pipeline (510) and a second cooling pipeline (520), the first cooling pipeline (510) and the second cooling pipeline (520) are both arranged in the lower housing (100); The first cooling pipeline (510) is arranged between the first end plate (300) and the cross beam (200), and the second cooling pipeline (520) is arranged between the second end plate (400) and the cross beam (200).

5. The battery pack housing according to claim 4, characterized in that: The liquid cooling pipeline also includes a first liquid inlet and outlet pipe (530) and a second liquid inlet and outlet pipe (540), wherein the first liquid inlet and outlet pipe (530), the first cooling pipeline (510), the second cooling pipe and the second liquid inlet and outlet pipe (540) are connected in sequence, and the lower shell (100) has a front end (110) and a rear end (120), wherein the first liquid inlet and outlet pipe (530) and the second liquid inlet and outlet pipe (540) are arranged at the front end (110).

6. The battery pack housing according to claim 5, characterized in that: The material of the first liquid inlet and outlet pipe (530) and the material of the second liquid inlet and outlet pipe (540) are aluminum, the crossbeam (200) is located between the front end (110) and the rear end (120), the first end plate (300) is close to the front end (110) relative to the crossbeam (200), and the second end plate (400) is close to the rear end (120) relative to the crossbeam (200).

7. The battery pack housing according to claim 2, characterized in that: The material of the first end plate (300), the material of the crossbeam (200), and the material of the second end plate (400) are all steel.

8. A battery pack, characterized in that: It comprises a plurality of batteries (10) and a battery pack housing according to any one of claims 1 to 7, wherein the plurality of batteries (10) are arranged in the lower housing (100).

9. The battery pack according to claim 8, characterized in that: The battery pack further comprises an extrusion plate (30), the extrusion plate (30) having a guide slope (31), the guide slope (31) being used for slidingly abutting against the first end plate (300), and the extrusion plate (30) being arranged between the battery (10) and the first end plate (300).

10. The battery pack according to claim 8, characterized in that: The battery pack further comprises a foam layer (20), and a foam layer (20) is provided between at least some of the adjacent batteries (10).

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