A battery box body and a battery box

Abstract

The present invention relates to the technical field of batteries, and particularly to a battery box body, which includes a liquid-cooled bottom plate and a bottom frame. A first liquid-cooled flow channel is arranged in the liquid-cooled bottom plate to accommodate a heat exchange medium. The bottom frame is circumferentially connected to a plurality of side edges of the liquid-cooled bottom plate, and the bottom frame is circumferentially clamped and positioned and adhesively fixed to the liquid-cooled bottom plate. In order to ensure the connection strength of the bottom frame, the bottom frame includes a first longitudinal beam, a first cross beam, a second longitudinal beam and a second cross beam that are sequentially clamped and positioned and welded and fixed. Therefore, the battery box body can reduce the process difficulty and avoid the problem that the liquid-cooled bottom plate is deformed due to welding and affects the assembly of the battery module. The present invention also provides a battery box, which includes a battery module and the above-mentioned battery box body, and the battery module is arranged in the battery box body.

Description

Technical Field

[0001] The present invention relates to the technical field of batteries, and particularly to a battery box body and a battery box. Background Art

[0002] The battery box body has multiple functions, which can insulate the internal battery modules, prevent the battery modules from contacting water, and protect the battery modules from collision and wear, etc. However, the existing battery box bodies are mostly formed by processes such as profile arc welding or friction stir welding, and have many defects. For example, the profile box body welding forming process is complex, the process cost is high, the thermal deformation of the box body after welding is large, the flatness is poor, and it affects the assembly of the battery modules, etc.

[0003] Therefore, there is an urgent need for a battery box body and a battery box to solve the above problems. Summary of the Invention

[0004] The purpose of the present invention is to provide a battery box body, which can reduce the process difficulty and avoid the influence of welding deformation on the assembly of battery modules.

[0005] To achieve this purpose, the present invention adopts the following technical solutions:

[0006] A battery box body, comprising:

[0007] A liquid-cooled bottom plate, in which a first liquid-cooled flow channel is arranged to accommodate a heat exchange medium;

[0008] A bottom frame, which is circumferentially connected to multiple side edges of the liquid-cooled bottom plate. The bottom frame is circumferentially clamped and positioned with the liquid-cooled bottom plate and adhesively fixed. The bottom frame includes a first longitudinal beam, a first cross beam, a second longitudinal beam, and a second cross beam that are sequentially clamped and positioned and welded and fixed.

[0009] As a preferred solution of the battery box body, a first liquid-cooled inlet and outlet flow channel is formed by enclosing the side edge of the first longitudinal beam and the liquid-cooled bottom plate, and a second liquid-cooled inlet and outlet flow channel is formed by enclosing the side edge of the second longitudinal beam and the liquid-cooled bottom plate. Both the first liquid-cooled inlet and outlet flow channel and the second liquid-cooled inlet and outlet flow channel are communicated with the first liquid-cooled flow channel.

[0010] As a preferred solution of the battery box body, a first pipeline is arranged on the first longitudinal beam, and the first pipeline is communicated with the first liquid-cooled inlet and outlet flow channel. A second pipeline is arranged on the second longitudinal beam, and the second pipeline is communicated with the second liquid-cooled inlet and outlet flow channel.

[0011] As a preferred solution of the battery box body, the first pipeline is arranged at one end of the first longitudinal beam, and the second pipeline is arranged at one end of the second longitudinal beam close to the first pipeline;

[0012] Or the second pipeline is arranged at one end of the second longitudinal beam far from the first pipeline.

[0013] As a preferred solution of the battery box body, it further includes a heating element. A heating accommodation cavity is arranged in the liquid-cooled bottom plate. The heating accommodation cavity is not communicated with the first liquid-cooled flow channel, and the heating element is arranged in the heating accommodation cavity.

[0014] As a preferred solution of the battery box body, the liquid-cooled bottom plate includes N + 1 arranged bottom plate monomers and N middle beams. The middle beams are arranged between two adjacent bottom plate monomers and are clamped to both of the bottom plate monomers.

[0015] As a preferred solution of the battery box body, a second liquid-cooled flow channel is arranged in the middle beam. Two ends of the second liquid-cooled flow channel are respectively communicated with the first liquid-cooled inlet / outlet flow channel and the second liquid-cooled inlet / outlet flow channel.

[0016] As a preferred solution of the battery box body, it further includes an upper shell, and the upper shell is connected to the bottom frame to form a box body.

[0017] As a preferred solution of the battery box body, the upper shell is detachably connected to the bottom frame.

[0018] Another object of the present invention is to provide a battery box, which can reduce the process difficulty and avoid the influence of welding deformation on the assembly of the battery module.

[0019] To achieve this purpose, the present invention adopts the following technical solutions:

[0020] A battery box includes a battery module and the above-mentioned battery box body, and the battery module is arranged in the battery box body.

[0021] The beneficial effects of the present invention:

[0022] The present invention provides a battery box body, which includes a liquid-cooled bottom plate and a bottom frame. A first liquid-cooled flow channel is arranged in the liquid-cooled bottom plate to accommodate a heat exchange medium. The bottom frame is circumferentially connected to multiple side edges of the liquid-cooled bottom plate, and the bottom frame is circumferentially clamped and positioned with the liquid-cooled bottom plate and adhesively fixed. This battery box body avoids multiple welding steps, and the bottom frame and the liquid-cooled bottom plate are assembled by means of clamping and positioning and adhesive fixing, which can reduce the process difficulty and can avoid the problem that the liquid-cooled bottom plate is deformed due to welding and affects the assembly of the battery module. In order to ensure the connection strength of the bottom frame, the bottom frame includes a first longitudinal beam, a first cross beam, a second longitudinal beam and a second cross beam that are sequentially clamped and positioned and welded and fixed.

[0023] The present invention also provides a battery box, which includes a battery module and the above-mentioned battery box body, and the battery module is arranged in the battery box body. It can be known that the manufacturing process difficulty of the battery box body of this battery box is reduced, and the problem that the battery box body is deformed due to large-area welding and affects the assembly of the battery module is avoided. Brief Description of the Drawings

[0024] Figure 1 FIG. 1 is a schematic structural view of a liquid-cooled bottom plate, a bottom frame and a front panel provided by an embodiment of the present invention;

[0025] Figure 2 FIG. 2 is an exploded view of a liquid-cooled bottom plate, a bottom frame and a front panel provided by an embodiment of the present invention;

[0026] Figure 3 FIG. 3 is a cross-sectional view of a liquid-cooled bottom plate and a bottom frame provided by an embodiment of the present invention;

[0027] Figure 4 FIG. 4 is an exploded view of a battery box provided by an embodiment of the present invention.

[0028] In the figures:

[0029] 1. Liquid-cooled bottom plate; 11. Bottom plate unit; 101. First liquid-cooling flow channel; 102. Heating accommodation cavity;

[0030] 2. Bottom frame; 21. First longitudinal beam; 22. First cross beam; 23. Second longitudinal beam; 24. Second cross beam;

[0031] 201. First liquid-cooling inlet and outlet flow channel; 202. Second liquid-cooling inlet and outlet flow channel;

[0032] 3. First pipeline; 4. Second pipeline; 5. Front panel;

[0033] 6. Middle beam; 601. Second liquid-cooling flow channel;

[0034] 7. Upper housing; 8. Battery module. Detailed Embodiments

[0035] The technical solutions of the present invention will be further described below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only for explaining the present invention, rather than limiting the present invention. In addition, it should be noted that, for the sake of convenience of description, only parts related to the present invention are shown in the drawings, rather than all of them.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly defined and limited, the terms "mounted", "connected" and "connected" should be understood in a broad sense. For example, it may be a fixed connection or a detachable connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] In the present invention, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may include direct contact between the first and second features, or may include the first and second features not being in direct contact but being in contact through additional features therebetween. Moreover, the first feature being "above", "over" and "on top of" the second feature includes the first feature being directly above and obliquely above the second feature, or merely indicating that the horizontal height of the first feature is higher than that of the second feature. The first feature being "under", "beneath" and "underneath" the second feature includes the first feature being directly below and obliquely below the second feature, or merely indicating that the horizontal height of the first feature is less than that of the second feature.

[0038] Existing battery boxes are mostly formed by processes such as profile arc welding or friction stir welding, which have many defects. For example, the profile box splicing and welding forming process is complex, the process cost is high, the thermal deformation of the box after welding is large, and the flatness is poor, affecting the assembly of the battery module 8, etc.

[0039] Therefore, the present embodiment provides a battery box to solve the above problems. As Figures 1 - 4 shown, the battery box includes a liquid-cooled bottom plate 1, a bottom frame 2, a front panel 5 and an upper cover.

[0040] Among them, a first liquid-cooling flow channel 101 is arranged in the liquid-cooled bottom plate 1 to accommodate a heat exchange medium. The bottom frame 2 is circumferentially connected to a plurality of side edges of the liquid-cooled bottom plate 1, and the bottom frame 2 is circumferentially clamped and positioned and adhesively fixed to the liquid-cooled bottom plate 1. This battery box avoids multiple welding steps, and adopts the method of clamping and positioning and adhesive fixing to assemble the bottom frame 2 and the liquid-cooled bottom plate 1, which can quickly position and avoid welding, thereby reducing the process difficulty, and can solve the problem that the assembly of the battery module 8 is affected by the deformation of the liquid-cooled bottom plate 1 caused by welding. And in order to ensure the connection strength of the bottom frame 2, the bottom frame 2 includes a first longitudinal beam 21, a first cross beam 22, a second longitudinal beam 23 and a second cross beam 24 that are sequentially clamped and positioned and welded and fixed. It can be known that the bottom frame 2 also adopts clamping and positioning to first fix the positional relationship between the horizontal and vertical beams, so as to quickly position and prepare for subsequent welding. Moreover, this battery box arranges the first liquid-cooling flow channel 101 in the liquid-cooled bottom plate 1. Compared with the separate arrangement of the bottom plate and the liquid-cooling plate, this battery box can reduce consumables, reduce weight and size, improve energy density, and is beneficial to the heat dissipation of the battery module 8.

[0041] Optionally, between two elements that are clamped to each other, one is provided with a convex part and the other is provided with a concave part to achieve clamping. Of course, in other embodiments, other clamping methods can be selected and will not be elaborated here. As Figure 3As shown, preferably, the first longitudinal beam 21 and the side of the liquid-cooled bottom plate 1 enclose to form a first liquid-cooling inlet and outlet channel 201, and the second longitudinal beam 23 and the side of the liquid-cooled bottom plate 1 enclose to form a second liquid-cooling inlet and outlet channel 202. Both the first liquid-cooling inlet and outlet channel 201 and the second liquid-cooling inlet and outlet channel 202 are communicated with the first liquid-cooling channel 101.

[0042] For the convenience of input and output of the heat exchange medium, as Figure 2 shown, preferably, a first pipeline 3 is arranged on the first longitudinal beam 21, and the first pipeline 3 is communicated with the first liquid-cooling inlet and outlet channel 201. A second pipeline 4 is arranged on the second longitudinal beam 23, and the second pipeline 4 is communicated with the second liquid-cooling inlet and outlet channel 202.

[0043] Preferably, the first pipeline 3 is arranged at one end of the first longitudinal beam 21, and the second pipeline 4 is arranged at one end of the second longitudinal beam 23 close to the first pipeline 3. Such an arrangement can make the heat exchange medium input and output on the same side, and compared with the arrangement on the opposite side, it can reduce the space occupation. Of course, in other embodiments, the second pipeline 4 can also be arranged at one end of the second longitudinal beam 23 far from the first pipeline 3, that is, the first pipeline 3 and the second pipeline 4 are arranged on the opposite sides.

[0044] As Figure 3 shown, preferably, the length direction of the first liquid-cooling inlet and outlet channel 201 of the liquid-cooled bottom plate 1 is the same as the length direction of the first longitudinal beam 21, both being the ab direction. The length direction of the second liquid-cooling inlet and outlet channel 202 is the same as the length direction of the second longitudinal beam 23, also being the ab direction. Optionally, the first liquid-cooling channel 101 is generally N-shaped and includes three groups of channel groups flowing along the cd direction, and each channel group includes two parallel channels.

[0045] To heat the battery module 8 so that it can be heated to the optimal working temperature at a lower temperature, preferably, the battery box body further includes a heating element. A heating accommodation cavity 102 is arranged in the liquid-cooled bottom plate 1, and the heating accommodation cavity 102 is not communicated with the first liquid-cooling channel 101. The heating element is arranged in the heating accommodation cavity 102. As Figure 3 shown, each heating accommodation cavity 102 is arranged between adjacent two groups of channel groups, so that heat can be quickly transferred to the heat exchange medium to realize the balance of heating the battery module 8. Of course, the arrangement position of the heating accommodation cavity 102 can also separate adjacent two groups of channels and has multiple functions.

[0046] To reduce the processing difficulty of the liquid-cooled bottom plate 1, in this embodiment, the battery box body selects a smaller bottom plate monomer 11, and a plurality of bottom plate monomers 11 are spliced to form the liquid-cooled bottom plate 1. That is, preferably, the liquid-cooled bottom plate 1 includes N + 1 arranged bottom plate monomers 11 and N middle beams 6. The middle beams 6 are arranged between adjacent two bottom plate monomers 11 and are both clamped with the two bottom plate monomers 11.

[0047] As Figure 3 shown, optionally, first through holes are provided at the positions where the two bottom plate monomers 11 are close to each other to communicate with the first liquid cooling inlet and outlet channels 201, that is, the heat exchange medium flows in from the middle of the liquid cooling bottom plate 1 and then flows in an N-shaped foldback to both sides. Second through holes are provided on the opposite side edges of the bottom plate monomer 11 where the first through holes are provided to communicate with the second liquid cooling inlet and outlet channels 202, and the two second through holes are both provided at the ends away from each other so that the heat exchange medium flows into the second liquid cooling inlet and outlet channels 202 from both sides.

[0048] As Figure 3 shown, preferably, a second liquid cooling channel 601 is provided in the middle beam 6, and both ends of the second liquid cooling channel 601 communicate with the first liquid cooling inlet and outlet channels 201 and the second liquid cooling inlet and outlet channels 202 respectively. It can be known that the heat dissipation in the middle of the battery module 8 is more difficult than that on both sides. Therefore, a second liquid cooling channel 601 is provided in the middle beam 6 to increase the temperature difference in the middle of the battery module 8, thereby improving the heat exchange efficiency.

[0049] As Figure 2 shown, preferably, the battery box body further includes a front panel 5, and the front panel 5 is connected to the second cross beam 24. Preferably, the battery box body further includes an upper shell 7, and the upper shell 7 is connected to both the bottom frame 2 and the front panel 5 to form a box body. Preferably, the upper shell 7 is detachably connected to both the bottom frame 2 and the front panel 5 to facilitate the subsequent maintenance and replacement of the battery module 8.

[0050] Optionally, both the liquid cooling bottom plate 1 and the bottom frame 2 are made of aluminum extrusion profiles. It can be known that the cavities of the aluminum extrusion profiles can be used as the first liquid cooling channel 101 and the heating accommodation cavity 102 in the liquid cooling bottom plate 1. By welding sealing members at appropriate positions, each cavity can be separated to achieve the above cavity form. The battery box body can reduce the manufacturing process difficulty and manufacturing cost, and can avoid the deformation caused by welding, and has good application effects.

[0051] As Figure 4 shown, this embodiment also provides a battery box, which includes a battery module 8 and the above battery box body, and the battery module 8 is arranged in the battery box body. It can be known that the manufacturing process difficulty of the battery box body of this battery box is reduced, and the problem that the deformation caused by large-area welding of the battery box body affects the assembly of the battery module 8 is avoided.

[0052] Obviously, the above embodiments of the present invention are merely examples given to clearly illustrate the present invention, rather than limitations on the implementation manners of the present invention. For those of ordinary skill in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A battery box body, characterized in that, Comprising: A liquid-cooled bottom plate (1), in which a first liquid-cooled flow channel (101) is arranged to accommodate a heat exchange medium; A bottom frame (2), which is circumferentially connected to multiple side edges of the liquid-cooled bottom plate (1). The bottom frame (2) is circumferentially clamped and positioned and adhesively fixed to the liquid-cooled bottom plate (1). The bottom frame (2) includes a first longitudinal beam (21), a first cross beam (22), a second longitudinal beam (23), and a second cross beam (24) that are sequentially clamped and positioned and welded and fixed; The first longitudinal beam (21) and the side edge of the liquid-cooled bottom plate (1) enclose a first liquid-cooled inlet and outlet flow channel (201), and the second longitudinal beam (23) and the side edge of the liquid-cooled bottom plate (1) enclose a second liquid-cooled inlet and outlet flow channel (202). The first liquid-cooled inlet and outlet flow channel (201) and the second liquid-cooled inlet and outlet flow channel (202) are both communicated with the first liquid-cooled flow channel (101); A first pipeline (3) is arranged on the first longitudinal beam (21), and the first pipeline (3) is communicated with the first liquid-cooled inlet and outlet flow channel (201). A second pipeline (4) is arranged on the second longitudinal beam (23), and the second pipeline (4) is communicated with the second liquid-cooled inlet and outlet flow channel (202); The liquid-cooled bottom plate (1) includes N + 1 arranged bottom plate monomers (11) and N middle beams (6). The middle beams (6) are arranged between two adjacent bottom plate monomers (11) and are both clamped to the two bottom plate monomers (11); A second liquid-cooled flow channel (601) is arranged in the middle beam (6), and both ends of the second liquid-cooled flow channel (601) are respectively communicated with the first liquid-cooled inlet and outlet flow channel (201) and the second liquid-cooled inlet and outlet flow channel (202).

2. The battery box according to claim 1, characterized in that, The first pipeline (3) is arranged at one end of the first longitudinal beam (21), and the second pipeline (4) is arranged at one end of the second longitudinal beam (23) close to the first pipeline (3); Or the second pipeline (4) is arranged at one end of the second longitudinal beam (23) far from the first pipeline (3).

3. The battery box according to claim 1, characterized in that, It further includes a heating element. A heating accommodation cavity (102) is arranged in the liquid-cooled bottom plate (1). The heating accommodation cavity (102) is not communicated with the first liquid-cooled flow channel (101), and the heating element is arranged in the heating accommodation cavity (102).

4. The battery box according to claim 1, wherein, It further includes an upper shell (7), and the upper shell (7) is connected to the bottom frame (2) to form a box body.

5. The battery box according to claim 4, characterized in that, The upper shell (7) is detachably connected to the bottom frame (2).

6. A battery box, characterized in that, It includes a battery module (8) and the battery box as described in any one of claims 1-5, and the battery module (8) is arranged in the battery box.

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