Battery box body and battery module

Abstract

The utility model discloses a battery box body and a battery module, and relates to the technical field of battery packaging, the battery box body comprises a cover plate, box walls and a bottom plate; the cover plate, the box wall and the bottom plate are encircled to form an accommodating cavity for accommodating a functional device; the two ends of the box wall are each provided with a connecting part, and the connecting parts extend from the box wall to the containing cavity, so that a first installation space for containing the cover plate and a second installation space for containing the bottom plate are formed in the two ends of the box wall correspondingly. According to the battery box body provided by the invention, when the battery box bodies are stacked, compared with a traditional concave-convex matching mode, the occupied space in the battery box body can be reduced, so that the space utilization rate of the battery module is effectively improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and more particularly to a battery box and a battery module. BACKGROUND

[0002] When the battery modules are stacked, a concave-convex matching structure is usually used, that is, a convex surface or a concave surface is arranged on the top of the box of the battery module, and a concave surface or a convex surface is arranged on the bottom of the box, so that the top of the box and the bottom of the adjacent box are matched to realize the stacking of the battery modules. However, due to the influence of the height of the convex surface, the space utilization rate of the battery module is low.

[0003] Therefore, how to improve the space utilization rate of the battery module has become a technical problem to be solved by the person skilled in the art. CONTENT OF THE UTILITY MODEL

[0004] Therefore, how to improve the space utilization rate of the battery module has become a technical problem to be solved by the person skilled in the art.

[0005] Another purpose of the present application is to provide a battery module with the above-mentioned battery box.

[0006] To achieve the above-mentioned purposes, the present application provides the following technical solutions:

[0007] A battery box comprises a cover plate, a box wall and a bottom plate, the cover plate, the box wall and the bottom plate surround to form a containing cavity containing functional devices, wherein:

[0008] Both ends of the box wall are respectively provided with a connecting part, and the connecting part extends from the box wall to the direction of the containing cavity, so as to form a first mounting space containing the cover plate and a second mounting space containing the bottom plate at both ends of the box wall.

[0009] Optionally, in the above-mentioned battery box, the first mounting space and the second mounting space are respectively provided with a first sealing piece and a second sealing piece, the first sealing piece is located between the connecting part of the first mounting space and the cover plate, and the second sealing piece is located between the connecting part of the second mounting space and the bottom plate.

[0010] Optionally, in the above-mentioned battery box, the connecting part and the end face of the box wall have a preset distance, and the preset distance is not less than zero.

[0011] Optionally, in the above-mentioned battery box, the thickness of the side wall of the first mounting space is not less than the thickness of the side wall of the second mounting space.

[0012] Optionally, in the battery box body, side walls of the first mounting space are distributed along a circumferential direction of the box wall close to the cover plate opening side; and / or,

[0013] Side walls of the second mounting space are distributed along a circumferential direction of the box wall close to the bottom plate opening side.

[0014] Optionally, in the battery box body, an end surface of the box wall is bent towards the accommodation cavity to form the connecting portion.

[0015] A battery module comprising the battery box body according to any one of the above.

[0016] Optionally, in the battery module, the battery box body comprises at least two, and the two battery box bodies are stacked to form a gap between the two battery box bodies.

[0017] Optionally, in the battery module, the cover plate of the battery box body is attached to the bottom plate of the adjacent battery box body at the connecting portion; or,

[0018] The cover plate of the battery box body has a preset gap with the bottom plate of the adjacent battery box body at the connecting portion.

[0019] Optionally, in the battery module, the cover plate is bent away from the accommodation cavity at the connecting portion of the first mounting space to form a first protruding portion; and / or,

[0020] The bottom plate is bent away from the accommodation cavity at the connecting portion of the second mounting space to form a second protruding portion.

[0021] The battery box body provided by the present application forms an accommodation cavity for accommodating functional devices by the cover plate, the box wall and the bottom plate. Both ends of the box wall are respectively provided with a connecting portion, and the connecting portion extends from the box wall towards the accommodation cavity to form a first mounting space for accommodating the cover plate and a second mounting space for accommodating the bottom plate at both ends of the box wall, so that the occupied space inside the battery box body can be reduced when the battery box bodies are stacked. As can be seen from the above examples, compared with the traditional concave-convex matching mode, the battery box body provided by the present application can reduce the occupied space inside the battery box body when the battery box bodies are stacked, thereby effectively improving the space utilization rate of the battery module.

[0022] The technical features mentioned above, the technical features mentioned below, and the technical features shown in the drawings alone can be combined with each other arbitrarily, as long as the technical features to be combined are not contradictory to each other. All the feasible combinations of features are explicitly described herein. Any one of the multiple sub-features included in the same sentence can be applied independently, and does not have to be applied together with other sub-features. BRIEF DESCRIPTION OF DRAWINGS

[0023] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or prior art description will be briefly introduced as follows. Obviously, the drawings in the following description are only embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of the provided drawings.

[0024] Figure 1 The structural schematic diagram of the battery box provided in the embodiment of the present application is shown in the figure.

[0025] Figure 2 The structural schematic diagram of the box wall provided in the first embodiment of the present application is shown in the figure.

[0026] Figure 3 The cross-sectional view of the box wall provided in the first embodiment of the present application is shown in the figure.

[0027] Figure 4 The structural schematic diagram of the box wall provided in the second embodiment of the present application is shown in the figure.

[0028] Figure 5 The cross-sectional view of the box wall provided in the second embodiment of the present application is shown in the figure.

[0029] Figure 6 The partial schematic diagram of the battery box stack provided in the first embodiment of the present application is shown in the figure.

[0030] Figure 7 The partial schematic diagram of the battery box stack provided in the second embodiment of the present application is shown in the figure.

[0031] Figure 8 The schematic diagram of the battery box stack provided in the embodiment of the present application is shown in the figure.

[0032] In the figure, 100 is a battery box, 101 is a cover plate, 1011 is a first protruding rib, 102 is a box wall, 1021 is a connecting part, 1022 is a first mounting space, 1023 is a second mounting space, 103 is a bottom plate, 1031 is a second protruding part, 1032 is a second protruding rib, 104 is a containing cavity, 105 is a first sealing element, 106 is a second sealing element, and 107 is a gap. DETAILED DESCRIPTION

[0033] The core of the present application is to provide a battery box to improve the space utilization of the battery module.

[0034] Another core of the present application is to provide a battery module with the above battery box.

[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0036] The existing household battery module usually adopts single seam design to ensure appearance performance, that is, there is only one stacking gap between the upper and lower stacked battery modules. At the same time, the household battery module usually adopts concave-convex matching structure when stacking, that is, a convex surface or a concave surface is arranged on the top of the box of the battery module, and a concave surface or a convex surface is arranged on the bottom of the box, so that the top of the box and the bottom of the adjacent box are matched to realize the stacking of the battery module. However, due to the influence of the height of the convex surface, the space utilization of the battery module is low.

[0037] Therefore, as shown in Figure 1 The present application discloses a battery box 100, which comprises a cover plate 101, a box wall 102 and a bottom plate 103, and the cover plate 101, the box wall 102 and the bottom plate 103 surround to form a containing cavity 104 containing functional devices. The functional devices can be battery modules, switch boxes, etc. When the battery box 100 is stacked and placed, compared with the traditional concave-convex matching mode, the occupied space inside the battery box 100 can be reduced, thereby effectively improving the space utilization of the battery module.

[0038] The battery box 100 disclosed in the embodiments of the present application will be specifically explained and described below. Figures 1 to 8

[0039] As shown in Figures 2 to 7 The two ends of the box wall 102 are respectively provided with a connecting part 1021, and the connecting part 1021 extends from the box wall 102 to the direction of the containing cavity 104, so as to form a first mounting space 1022 containing the cover plate 101 and a second mounting space 1023 containing the bottom plate 103 at the two ends of the box wall 102 respectively, thereby reducing the occupied space inside the battery box 100 when the battery box 100 is stacked and placed, and effectively improving the space utilization of the battery module.

[0040] ​For the convenience of understanding, the two ends of the box wall 102 are defined as the first end and the second end, respectively, and the connecting part 1021 of the first end of the box wall 102 forms a first mounting space 1022 to mount the cover plate 101 of the battery box body 100, and the connecting part 1021 of the second end of the box wall 102 forms a second mounting space 1023 to mount the bottom plate 103 of the battery box body 100, so that when the battery box body 100 is stacked and placed, the occupied space inside the battery box body 100 can be reduced, and the space utilization rate of the battery module can be effectively improved.

[0041] In some embodiments, as shown in Figure 2 and Figure 4 , the battery box body 100 can adopt a cuboid structure, and the two ends of the box wall 102 form a rectangular opening, and the connecting part 1021 can adopt a rectangular ring structure continuously distributed along the circumferential direction of the opening side of the box wall 102, so as to ensure a larger contact area between the connecting part 1021 and the bottom plate 103 or the cover plate 101, and improve the connection strength between the connecting part 1021 and the bottom plate 103 or the cover plate 101. Among them, the four corner portions of the connecting part 1021 can be subjected to strengthening treatment, such as increasing the thickness of the connecting part 1021 of the four corner portions, or increasing the area of the connecting part 1021 of the four corner portions, so as to improve the strength of the connecting part 1021. At the same time, the cover plate 101 and the bottom plate 103 can be connected with the connecting part 1021 by means of fasteners such as bolts, or can be installed and fixed by means of clamping connection.

[0042] In order to realize the sealing effect of the battery box body 100, in some embodiments, as shown in Figure 6 and Figure 7 , a first sealing member 105 and a second sealing member 106 are further arranged in the first mounting space 1022 and the second mounting space 1023, respectively, and the first sealing member 105 is located between the connecting part 1021 of the first end of the box wall 102 and the cover plate 101, and the second sealing member 106 is located between the connecting part 1021 of the second end of the box wall 102 and the bottom plate 103, so as to realize the sealing effect of the top and bottom of the battery box body 100. Among them, the first sealing member 105 can adopt a ring-shaped rubber sealing gasket matched with the connecting part 1021 of the first end of the box wall 102, or can be sealed by filling sealant, and the second sealing member 106 can adopt a ring-shaped rubber sealing gasket matched with the connecting part 1021 of the second end of the box wall 102, or can be sealed by filling sealant, which is not limited herein.

[0043] As shown in Figure 6 and Figure 7As shown, in some embodiments, to improve the stability of the battery housings 100 when stacked, the thickness of the sidewall of the first mounting space 1022 is not less than the thickness of the sidewall of the second mounting space 1023, so that the top of the battery housing 100 has greater support strength, ensuring the stability of the battery housings 100 when stacked and avoiding out-of-plane instability. Meanwhile, as... Figure 4 As shown, the sidewalls of the first installation space 1022 can be continuously and uniformly distributed along the circumferential direction of the box wall 102 near the opening of the cover plate 101, that is, continuously distributed with equal thickness along the circumferential direction of the first end of the box wall 102. Of course, the sidewalls of the first installation space 1022 can also be spaced apart along the circumferential direction of the box wall 102 near the opening of the cover plate 101, such as... Figure 2 As shown, one or more notches can be provided on the side wall of the first installation space 1022, or the side wall of the first installation space 1022 can be continuously and non-uniformly distributed along the circumferential direction of the box wall 102 near the opening side of the cover plate 101, that is, continuously and unequally distributed along the circumferential direction of the first end of the box wall 102. Similarly, the side wall of the second installation space 1023 can be continuously and uniformly distributed along the circumferential direction of the box wall 102 near the opening side of the bottom plate 103, that is, continuously and equally distributed along the circumferential direction of the second end of the box wall 102. Of course, the side wall of the second installation space 1023 can also be spaced apart along the circumferential direction of the box wall 102 near the opening side of the bottom plate 103. That is, one or more notches can be provided on the side wall of the second installation space 1023, or the side wall of the second installation space 1023 can be continuously and non-uniformly distributed along the circumferential direction of the box wall 102 near the opening side of the bottom plate 103, that is, continuously and unequally distributed along the circumferential direction of the second end of the box wall 102. It should be noted that, in the above embodiments, the sidewalls of the box wall 102 can also be arranged in a combination of continuous and intermittent distribution. That is, the sidewalls of the first installation space 1022 can be continuously distributed with equal thickness along the circumferential direction of the first end of the box wall 102, while the sidewalls of the second installation space 1023 can be intermittently distributed along the circumferential direction of the box wall 102 near the opening of the bottom plate 103. Alternatively, the sidewalls of the second installation space 1023 can be continuously distributed with equal thickness along the circumferential direction of the second end of the box wall 102, while the sidewalls of the first installation space 1022 can be intermittently distributed along the circumferential direction of the box wall 102 near the opening of the cover plate 101.

[0044] In some embodiments, such as Figure 3 As shown, the box wall 102 and the connecting part 1021 can adopt a split structure, and there is a preset distance between the end face of the connecting part 1021 and the box wall 102, and the preset distance is not less than zero, so as to form a first installation space 1022 and a second installation space 1023, so that the cover plate 101 and the bottom plate 103 can be installed respectively. Of course, as Figure 5As shown, the box wall 102 and the connecting part 1021 can also adopt an integral structure, that is, the two ends of the box wall 102 can be bent into the inside of the receiving cavity 104 to form the connecting part 1021 of the mounting cover plate 101 and the bottom plate 103 respectively. Furthermore, an overlapping area can be formed at the side wall of the first mounting space 1022 and the side wall of the second mounting space 1023 to improve the strength of the side wall of the first mounting space 1022 and the side wall of the second mounting space 1023, thereby reducing the risk of deformation of the side wall of the first mounting space 1022 and the side wall of the second mounting space 1023 under pressure.

[0045] For ease of understanding, the distance between the connecting part 1021 at the first end of the box wall 102 and the end face of the first end of the box wall 102 is defined as Δ0, the distance between the connecting part 1021 at the second end of the box wall 102 and the end face of the second end of the box wall 102 is defined as Δ1, the distance between the side of the connecting part 1021 at the first end of the box wall 102 away from the second end of the box wall 102 and the side of the connecting part 1021 at the second end of the box wall 102 away from the first end of the box wall 102 is defined as H1, and the height of the box wall 102 is defined as H0.

[0046] like Figure 6 As shown, in some embodiments, when the battery cases 100 are stacked, the cover plate 101 of the battery case 100 can be fitted with the bottom plate 103 of the adjacent battery case 100 at the connection part 1021, that is, the contact height h is the sum of the thickness δ1 of the cover plate 101 and the thickness δ2 of the bottom plate 103. Preferably, the sum of the distance Δ0 between the connection part 1021 at the first end of the case wall 102 and the end face of the first end of the case wall 102, the distance Δ1 between the connection part 1021 at the second end of the case wall 102 and the end face of the second end of the case wall 102, and the height δ5 of the gap 107 between two adjacent battery cases 100 is equal to the sum of the thickness δ1 of the cover plate 101, the thickness δ2 of the bottom plate 103, the thickness δ3 of the first seal 105, and the thickness δ4 of the second seal 106.

[0047] like Figure 7 As shown, in some embodiments, when the battery cases 100 are stacked, the cover plate 101 of the battery case 100 and the bottom plate 103 of the adjacent battery case 100 may also have a preset gap at the connection part 1021, that is, the contact height h is greater than the sum of the thickness δ1 of the cover plate 101 and the thickness δ2 of the bottom plate 103. Preferably, the sum of the distance Δ0 between the connection part 1021 at the first end of the case wall 102 and the end face of the first end of the case wall 102, the distance Δ1 between the connection part 1021 at the second end of the case wall 102 and the end face of the second end of the case wall 102, and the height δ5 of the gap 107 between two adjacent battery cases 100 is equal to the sum of the contact height h, the thickness δ3 of the first seal 105, and the thickness δ4 of the second seal 106.

[0048] In the above embodiment, in order to achieve the preset gap between the cover plate 101 of the battery box 100 and the bottom plate 103 of the adjacent battery box 100 at the position of the connecting portion 1021, the cover plate 101 can be bent away from the accommodating cavity 104 at the position of the connecting portion 1021 of the first mounting space 1022 to form a first protruding portion, so as to achieve the preset gap between the cover plate 101 of the battery box 100 and the bottom plate 103 of the adjacent battery box 100 at the position of the connecting portion 1021. Of course, the bottom plate 103 can also be bent away from the accommodating cavity 104 at the position of the connecting portion 1021 of the second mounting space 1023 to form a second protruding portion 1031, as shown in the figure, so as to achieve the preset gap between the cover plate 101 of the battery box 100 and the bottom plate 103 of the adjacent battery box 100 at the position of the connecting portion 1021. Alternatively, the cover plate 101 is bent away from the accommodating cavity 104 at the position of the connecting portion 1021 of the first mounting space 1022 to form a first protruding portion, and the bottom plate 103 is bent away from the accommodating cavity 104 at the position of the connecting portion 1021 of the second mounting space 1023 to form a second protruding portion 1031, so as to achieve the preset gap between the cover plate 101 of the battery box 100 and the bottom plate 103 of the adjacent battery box 100 at the position of the connecting portion 1021. Figure 7

[0049] As shown in the figure, in order to improve the strength of the cover plate 101 and the bottom plate 103, a plurality of first protruding ribs 1011 can be distributed on the cover plate 101 at intervals. While improving the strength of the cover plate 101, the heat dissipation area of the top of the battery box 100 can be increased, and the heat dissipation efficiency of the functional devices in the battery box 100 can be improved. Among them, the first protruding rib 1011 can be in the shape of a strip, a rectangle, a circle, etc., which is not limited herein. Similarly, a plurality of second protruding ribs 1032 can be distributed on the bottom plate 103 at intervals. While improving the strength of the bottom plate 103, the heat dissipation area of the bottom of the battery box 100 can also be increased, and the heat dissipation efficiency of the functional devices in the battery box 100 can be improved. Among them, the second protruding rib 1032 can be in the shape of a strip, a rectangle, a circle, etc., which is not limited herein. Figure 1

[0050] The embodiment of the application also discloses a battery module, comprising the battery box, which is the battery box 100 disclosed in the above embodiment, so that the battery box 100 has all the technical effects of the above battery box 100, which will not be repeated herein.

[0051] As shown in the figure, in order to improve the strength of the cover plate 101 and the bottom plate 103, a plurality of first protruding ribs 1011 can be distributed on the cover plate 101 at intervals. While improving the strength of the cover plate 101, the heat dissipation area of the top of the battery box 100 can be increased, and the heat dissipation efficiency of the functional devices in the battery box 100 can be improved. Among them, the first protruding rib 1011 can be in the shape of a strip, a rectangle, a circle, etc., which is not limited herein. Similarly, a plurality of second protruding ribs 1032 can be distributed on the bottom plate 103 at intervals. While improving the strength of the bottom plate 103, the heat dissipation area of the bottom of the battery box 100 can also be increased, and the heat dissipation efficiency of the functional devices in the battery box 100 can be improved. Among them, the second protruding rib 1032 can be in the shape of a strip, a rectangle, a circle, etc., which is not limited herein. Figure 8 ​​As shown, the battery case 100 can include at least two, and the two battery cases 100 are stacked to form a single slit 107 between the two battery cases 100. Of course, the battery case 100 can employ, but not limited to, two, and can employ three, four, five or more, which is not limited herein.

[0052] The terms "first" and "second", and the like, used in the description and the claims herein, and the above figures, are used to distinguish between similar objects, not to describe a particular sequential or chronological order. The terms "including" and "having", and any variations thereof, are intended to cover a non-exclusive inclusion. For example, a process, method, system, product, or apparatus that comprises a list of steps or units is not necessarily limited to those listed steps or units, but can include other not-listed steps or units.

[0053] The above description of disclosed embodiments will enable one of ordinary skill in the art to make and use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein can be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A battery case characterized by comprising: The battery box (100) comprises a cover plate (101), a box wall (102) and a bottom plate (103), which enclose a containing cavity (104) containing functional devices, wherein: Both ends of the box wall (102) are respectively provided with a connecting part (1021), and the connecting part (1021) extends from the box wall (102) to the containing cavity (104) to form a first mounting space (1022) containing the cover plate (101) and a second mounting space (1023) containing the bottom plate (103) at both ends of the box wall (102) respectively.

2. The battery pack of claim 1, wherein The first mounting space (1022) and the second mounting space (1023) are respectively provided with a first sealing member (105) and a second sealing member (106), the first sealing member (105) is located between the connecting part (1021) of the first mounting space (1022) and the cover plate (101), and the second sealing member (106) is located between the connecting part (1021) of the second mounting space (1023) and the bottom plate (103).

3. The battery pack of claim 1, wherein, The connecting part (1021) and the end face of the box wall (102) have a preset distance, and the preset distance is not less than zero.

4. The battery pack of claim 3, wherein, The thickness of the side wall of the first mounting space (1022) is not less than the thickness of the side wall of the second mounting space (1023).

5. The battery pack of claim 1, wherein, The side wall of the first mounting space (1022) is spaced along the circumferential direction of the box wall (102) close to the opening side of the cover plate (101); and / or, The side wall of the second mounting space (1023) is spaced along the circumferential direction of the box wall (102) close to the opening side of the bottom plate (103).

6. The battery pack of claim 1, wherein, The end face of the box wall (102) is bent to form the connecting part (1021) towards the containing cavity (104).

7. A battery module, characterized by, The battery box (100) comprises at least two, and the two battery boxes (100) are stacked to form a gap (107) between the two battery boxes (100).

8. The battery module of claim 7, wherein, The cover plate (101) of the battery box (100) is attached to the bottom plate (103) of the adjacent battery box (100) at the connecting part (1021); or, 9. The battery module of claim 8, wherein, The cover plate (101) of the battery box (100) has a preset gap with the bottom plate (103) of the adjacent battery box (100) at the connecting part (1021). The cover plate (101) is bent away from the containing cavity (104) at the connecting part (1021) of the first mounting space (1022) to form a first protruding part; and / or, 10. The battery module of claim 9, wherein, The bottom plate (103) is bent away from the containing cavity (104) at the connecting part (1021) of the second mounting space (1023) to form a second protruding part (1031). ​

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