A battery box integrated structure

Abstract

The utility model belongs to the technical field of battery packs, and provides an integrated structure of a battery box, including a box body, a liquid cooling plate, a cushion block, a reinforcing beam and a supporting beam assembly. The utility model provides an installation scheme for the box body, the liquid cooling plate and the reinforcing beam. During the production process of the battery pack, firstly, a heat insulating pad is affixed to the bottom of the box body, and then the integrated liquid cooling plate is installed to the bottom of the box body, and then the cushion block is placed on the box body short beam at the opening position of the liquid cooling plate, and then the box body reinforcing beam is placed in a fixed position, and finally the reinforcing beam is fixed to the inside of the box body with bolts. The liquid cooling plate is located between the short beam and the reinforcing beam welded to the box body, and the cushion block can limit the position of the liquid cooling plate. The above-mentioned installation method can retain the integrity of the liquid cooling plate without affecting the strength of the overall battery pack, reduce the number of cooling pipes inside the box body, and improve the liquid cooling efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of battery packs, and particularly relates to a battery box integrated structure. Background Art

[0002] At present, the new energy vehicle industry is developing rapidly. As one of the core components of new energy vehicles, the battery pack is responsible for providing energy to the vehicle motor during driving. During the charging and discharging process of the battery cell, a large amount of heat will be generated. Therefore, when designing the battery pack, a liquid cooling system will be set at the bottom or side of the battery cell to cool the battery cell and ensure the continuous discharge performance of the battery pack.

[0003] Conventional battery cases are made of sheet metal stamping or welding, with horizontal and vertical reinforcing beams welded inside to improve the overall strength of the battery pack. However, this also divides the liquid cooling plate at the bottom of the battery cell into many pieces, thereby increasing the number of parts and the installation process, affecting the stability of the cooling system. Utility Model Content

[0004] In order to solve at least one problem in the background technology, the utility model proposes a battery box integrated structure.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A battery box integrated structure, comprising a box body, a liquid cooling plate, a cushion block, a reinforcing beam and a supporting beam assembly;

[0007] The support beam assembly is installed on the bottom surface of the box body;

[0008] The liquid cooling plate is positioned and fixed by a support beam assembly;

[0009] A plurality of the pads are installed on the support beam assembly through the liquid cooling plate and distributed along a straight line to limit the movement of the liquid cooling plate in a horizontal plane;

[0010] The reinforcing beam is fixed on the surface of the cushion block and the supporting beam assembly.

[0011] Preferably, the box body and the support beam assembly are both symmetrical structures.

[0012] Preferably, the support beam assembly comprises a front beam, a side beam, a rear beam and a thermal insulation pad;

[0013] The front beam and the rear beam are respectively located at the front end and the rear end of the inner surface of the box body;

[0014] One end of the side beam is connected to the front beam, and the other end is connected to the rear beam;

[0015] The two side beams are symmetrically installed on both sides of the inner surface of the box body;

[0016] The heat insulation pads are parallel to the front beam or the rear beam, and a plurality of the heat insulation pads are arranged in an array and are arranged between symmetrical side beams.

[0017] Preferably, the side beam comprises a front side beam and a rear side beam connected to each other.

[0018] Preferably, a limiting bracket is also installed on the inner bottom surface of the box body, and the limiting bracket is located on the inner side of the front beam.

[0019] Preferably, the bottoms of the front beam, front side beam, rear side beam, rear beam and limiting bracket are all bent sheet metal sections;

[0020] The level of the liquid cooling plate is lower than that of the side beams.

[0021] Preferably, the liquid cooling plate is in a "T" shape, and has two water nozzles on its surface for inputting and outputting cooling medium.

[0022] Preferably, a positioning beam is also installed on the inner bottom surface of the box body, and the horizontal height of the positioning beam is lower than the liquid cooling plate;

[0023] The positioning beam is provided with a plurality of installation positions reserved therefor, and the installation positions are used for installing cushion blocks;

[0024] The two ends of the reinforcing beam are welded with extension sections for welding in multiple directions to increase the contact area with the box skin.

[0025] Preferably, the reinforcing beam is in a "U" shape and is fixed to the surface of the cushion block and the side beam;

[0026] The reinforcing beam is fixedly connected to the cushion block and the side beam through a plurality of fastening bolts.

[0027] Preferably, the pad is welded to the positioning beam.

[0028] Beneficial effects of the utility model:

[0029] 1. The utility model provides an installation scheme for a box, a liquid cooling plate and a reinforcing beam. During the production process of the battery pack, first, a heat insulating pad is attached to the bottom of the box, and then the integrated liquid cooling plate is installed to the bottom of the box, and then the pad is placed on the box short beam at the opening position of the liquid cooling plate, and then the box reinforcing beam is placed in a fixed position, and finally the reinforcing beam is fixed to the inside of the box with bolts. The liquid cooling plate is located between the short beam and the reinforcing beam welded to the box, and the pad can limit the position of the liquid cooling plate. The above installation method can retain the integrity of the liquid cooling plate without affecting the strength of the overall battery pack, reduce the number of cooling pipes inside the box, and improve the liquid cooling efficiency.

[0030] 2. The liquid cooling plate of the utility model is convenient to be placed in the box as a whole. After the pad is locked, it will not be displaced, which is convenient for the subsequent gluing and module placement. In addition, while retaining the integrity of the liquid cooling plate, it does not affect the strength of the overall battery pack, reduces the number of cooling pipes inside the box, reduces the risk of leakage, and saves space inside the box.

[0031] 3. The reinforcing beam of the utility model improves the overall strength of the box body through the cushion block, thereby enhancing the anti-deformation ability.

[0032] Other features and advantages of the utility model will be described in the following description, and partly become apparent from the description, or understood by implementing the utility model. The purpose and other advantages of the utility model can be realized and obtained by the structures indicated in the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0034] Figure 1 An exploded view of a battery box integrated structure of the utility model is shown;

[0035] Figure 2 A top view of the integrated battery box of the utility model is shown.

[0036] In the figure: 1. box body; 2. liquid cooling plate; 201. water nozzle; 202. through hole; 3. pad; 4. reinforcing beam; 401. fastening bolt; 5. limit bracket; 6. front beam; 7. positioning beam; 8. front side beam; 9. rear side beam; 10. rear beam; 11. thermal insulation pad. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the embodiment of the utility model clearer, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model. Obviously, the described embodiment is a part of the embodiment of the utility model, not all of the embodiments. Based on the embodiment of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] A battery box integrated structure, such as Figure 1 and Figure 2As shown, it includes a box 1, a liquid cooling plate 2, a cushion block 3, a reinforcing beam 4 and a supporting beam assembly. The supporting beam assembly is installed on the bottom surface of the box 1. The liquid cooling plate 2 is positioned and fixed by the supporting beam assembly. The cushion block 3 passes through the liquid cooling plate 2 and is installed on the supporting beam assembly. Figure 1 Three pads 3 are used to be distributed along a straight line, so as to limit the movement of the liquid cooling plate 2 in a horizontal plane. The reinforcing beam 4 is fixed on the surface of the pad 3 and the supporting beam assembly.

[0039] It should be noted that a plurality of rectangular through holes 202 are provided on the liquid cooling plate 2 , which are adapted to the shape of the cushion block 3 , so as to facilitate the passage of the cushion block 3 and limit the movement of the liquid cooling plate 2 in the horizontal plane.

[0040] It should be noted that, in some embodiments, the box body 1 and the support beam assembly are both symmetrical structures. Figure 1 In the embodiment, the box body 1 is generally a stamped part. After the liquid cooling plate 2, the gasket 3 and other supporting parts are assembled, they are sealed by the box cover. The box cover is also a stamped part, and a sealing rubber ring is used at the sealing point. Finally, the box body 1 and the box cover are locked by screws. In addition, the structure of the box body 1 is mainly divided into two parts. Taking the shape of its inner bottom surface as an example, one part is an isosceles trapezoidal structure, and the other part is a rectangular structure. Of course, the structure of the box body 1 is related to the design requirements and is not limited to the above-mentioned shape.

[0041] Further, in Figure 1 In the embodiment, the support beam assembly includes a front beam 6, a side beam, a rear beam 10 and a heat insulation pad 11. The front beam 6 and the rear beam 10 are respectively located at the front end and the rear end of the inner surface of the box body 1; one end of the side beam is connected to the front beam 6, and the other end is connected to the rear beam 10; the two side beams are symmetrically installed on both sides of the inner surface of the box body 1; the heat insulation pad 11 is parallel to the front beam 6 or the rear beam 10, and a plurality of them are arranged in an array and arranged between the symmetrical side beams.

[0042] It should be noted that, in some embodiments, the side beam includes a front side beam 8 and a rear side beam 9 that are connected to each other. Figure 2 It can be seen that the front side beam 8 is installed at the edge of the trapezoidal structure, and the rear side beam 9 is installed at the edge of the rectangular structure, and the front side beam 8 and the rear side beam 9 can be connected by welding, screws, etc.

[0043] It should be further explained that the support beam assembly can greatly improve the structural strength of the bottom of the box 1. In addition, during the installation process, it is necessary to consider the interference with parts such as the liquid cooling plate 2. Therefore, the position and structure of the support beam assembly need to be reasonably arranged to avoid mutual interference between parts and maximize the use of the space of the box 1.

[0044] Furthermore, a limiting bracket 5 is installed on the inner bottom surface of the box body 1 , and the limiting bracket 5 is located on the inner side of the front beam 6 .

[0045] It should be noted that the limiting bracket 5 is a sheet metal bracket, and its function is to protect the liquid cooling plate 2 on one side of the front beam 6 .

[0046] Furthermore, the front beam 6, the front side beam 8, the rear side beam 9, the rear beam 10 and the bottom of the limit bracket 5 are all bent sheet metal sections, which will not interfere with the liquid cooling plate 2 and the insulation pad 11. The horizontal height of the liquid cooling plate 2 is lower than the horizontal height of the side beams.

[0047] It should be noted that through Figure 1 It can be seen that the front beam 6, the front side beam 8, the rear side beam 9 and the rear beam 10 can also be made of sheet metal. Moreover, the structures of the front beam 6, the front side beam 8, the rear side beam 9 and the rear beam 10 contacting the inner bottom surface of the box body 1 are bent sheet metal sections, which are arranged along the edge of the liquid cooling plate 2.

[0048] Furthermore, the liquid cooling plate 2 is in a "T" shape, and has two water nozzles 201 on the surface for inputting and outputting cooling medium. Specifically, the water nozzles 201 can be arranged at the corners of the liquid cooling plate 2, and the cooling medium can be cooling water.

[0049] It should be noted that the liquid cooling plate 2 is an integral structure, and its interior is filled with cooling channels. The design of the cooling channels can be modified according to actual needs, and the position of the water nozzle 201 can also be modified according to needs. Generally speaking, it is necessary to ensure that the water nozzle 201 does not interfere with other parts, and it is also convenient to inspect and repair the water nozzle 201.

[0050] Furthermore, a positioning beam 7 is installed on the bottom surface of the box body 1. The horizontal height of the positioning beam 7 is lower than the liquid cooling plate 2. The two ends of the positioning beam 7 are the side beams of the box body 1. The height of the positioning beam 7 is higher than the top of the liquid cooling plate 2 by a certain distance to ensure that the installed reinforcing beam 4 will not interfere with the liquid cooling plate 2. At the placement position of the pad 3, the positioning beam 7 is designed with a protrusion and an opening, and a nut is welded on the back of the hole and fixed with a long bolt. The positioning beam 7 has several installation positions reserved, and the pad 3 is welded at the installation position. In addition, the reinforcing beam 4 is in a "U" shape, fixed on the surface of the pad 3 and the side beam, and is fixedly connected to the pad 3 and the side beam by a number of fastening bolts 401, which can improve the strength of the box body 1.

[0051] It should be noted that in Figure 1 In the structure, the front beam 6, the front side beam 8, the rear side beam 9 and the rear beam 10 form the frame structure at the bottom of the box 1, and then the bottom support beam assembly is further strengthened by the reinforcing beam 4. At the same time, the pad 3 is cleverly used to limit the position of the liquid cooling plate 2, and the space formed by the support beam assembly is reasonably used. In addition, for the reinforcing beam 4, a bushing is welded at the opening installation position, which is conducive to the force transmission after the bolt is tightened. Multiple extension sections ( Figure 1 There are two in the figure), which increases the contact area with the skin of the box body 1.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery box integrated structure, characterized in that: It comprises a box body (1), a liquid cooling plate (2), a cushion block (3), a reinforcing beam (4) and a supporting beam assembly; The support beam assembly is installed on the inner bottom surface of the box body (1); The liquid cooling plate (2) is positioned and fixed by a support beam assembly; A plurality of the pads (3) pass through the liquid cooling plate (2) and are installed on the support beam assembly and are distributed along a straight line, so as to limit the movement of the liquid cooling plate (2) in a horizontal plane; The reinforcing beam (4) is fixed on the surface of the cushion block (3) and the supporting beam assembly.

2. A battery box integrated structure according to claim 1, characterized in that: The box body (1) and the support beam assembly are both symmetrical structures.

3. A battery box integrated structure according to claim 2, characterized in that: The support beam assembly comprises a front beam (6), a side beam, a rear beam (10) and a heat insulation pad (11); The front beam (6) and the rear beam (10) are respectively located at the front end and the rear end of the inner surface of the box body (1); One end of the side beam is connected to the front beam (6), and the other end is connected to the rear beam (10); The two side beams are symmetrically mounted on both sides of the inner surface of the box body (1); The heat insulation pads (11) are parallel to the front beam (6) or the rear beam (10), and a plurality of them are arranged in an array and are arranged between symmetrical side beams.

4. A battery box integrated structure according to claim 3, characterized in that: The side beam comprises a front side beam (8) and a rear side beam (9) which are connected to each other.

5. A battery box integrated structure according to claim 4, characterized in that: A limiting bracket (5) is also installed on the inner bottom surface of the box body (1), and the limiting bracket (5) is located on the inner side of the front beam (6).

6. A battery box integrated structure according to claim 5, characterized in that: The bottoms of the front beam (6), the front side beam (8), the rear side beam (9), the rear beam (10) and the limiting bracket (5) are all bent sheet metal sections; The horizontal height of the liquid cooling plate (2) is lower than the horizontal height of the side beam.

7. A battery box integrated structure according to claim 6, characterized in that: The liquid cooling plate (2) is in a "T" shape, and has two water nozzles (201) on its surface for inputting and outputting cooling medium.

8. A battery box integrated structure according to any one of claims 3 to 7, characterized in that: A positioning beam (7) is also installed on the inner bottom surface of the box body (1), and the horizontal height of the positioning beam (7) is lower than that of the liquid cooling plate (2); The positioning beam (7) is provided with a plurality of installation positions reserved therefor, and the installation positions are used to install the cushion blocks (3); The two ends of the reinforcing beam (4) are welded with extension sections for welding in multiple directions to increase the contact area with the skin of the box body (1).

9. A battery box integrated structure according to claim 8, characterized in that: The reinforcing beam (4) is in a "U" shape and is fixed on the pad (3) and the surface of the side beam; The reinforcing beam (4) is fixedly connected to the cushion block (3) and the side beam via a plurality of fastening bolts (401).

10. A battery box integrated structure according to claim 8, characterized in that: The cushion block (3) is welded to the positioning beam (7).

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