Battery shell, battery and electric equipment

Abstract

The utility model discloses a battery shell, a battery and electric equipment, the battery shell comprises a shell and a plurality of cover plates, the shell comprises a first side plate and a second side plate fixedly arranged on the first side plate; a battery cell accommodating cavity and a plurality of openings communicated with the battery cell accommodating cavity are defined by the first side plate and the second side plate; first limiting parts are arranged at the openings, second limiting parts connected with the first limiting parts in a matched mode are arranged on the cover plates, and the multiple cover plates are fixed to the multiple openings in a covering mode so as to seal the battery cell containing cavity. The cover plate is provided with the second limiting part which is adaptively connected with the first limiting part, so that the outer side of the cover plate can be limited to be flush with the outer side of the shell, the connection precision between the cover plate and the shell is improved, the cover plate and the shell are welded and fixed, and the welding quality and the welding yield are improved.

Description

Technical Field

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

[0002] At present, with the increasing miniaturization, lightness and portability of electronic products, such as cameras, notebooks and mobile phones, the driving power of these electronic products is also developing in the direction of high capacity, high safety and lightness. Batteries are widely used in electronic products due to their excellent characteristics such as high capacity.

[0003] The battery includes a shell with a one-way opening, a top cover and a battery cell. The shell is provided with a shell cavity, and the battery cell is placed in the shell cavity. Two poles are provided on the top cover. The poles are electrically connected to the battery cell through a soft connecting piece and can be connected to the outside.

[0004] In the prior art, when the top cover is welded and sealed in the shell, the alignment accuracy of the opening edge of the top cover and the shell is likely to be insufficient, resulting in risks such as deformation and air leakage between the shell and the top cover during welding. Utility Model Content

[0005] The utility model aims to provide a battery shell, a battery and an electrical device, aiming to solve the problem that in the process of welding and sealing the existing top cover to the shell, the top cover and the opening edge of the shell are easily not accurately aligned, which leads to the risk of deformation and air leakage between the shell and the top cover during welding.

[0006] In a first aspect, the utility model provides a battery case, the battery case comprising:

[0007] A shell, the shell comprising a first side plate, and a second side plate fixedly mounted on the first side plate; the first side plate and the second side plate enclose a battery cell accommodating cavity and a plurality of openings communicating with the battery cell accommodating cavity; a first limiting portion is provided at the opening; and

[0008] A plurality of cover plates are provided with a second limiting portion adapted to be connected with the first limiting portion, and the plurality of cover plates are respectively covered and fixed at the plurality of openings to seal the battery cell accommodating cavity.

[0009] In one embodiment, the first limiting portion includes a plurality of support portions that are spaced apart from each other, and the second limiting portion abuts against the plurality of support portions.

[0010] In one embodiment, the plurality of support portions are protruding structures formed in the battery cell accommodating cavity.

[0011] In one embodiment, the first limiting portion further includes an extension section, and the plurality of support portions are all connected to the extension section and are integrally formed with the extension section.

[0012] In one embodiment, the shell and the cover plates are structural members made of stainless steel, and the thickness of the wall plates of the shell and the cover plates is no more than 0.2 mm.

[0013] In one embodiment, the battery case further includes a first pole module and a second pole module;

[0014] The first pole module is disposed on one of the plurality of cover plates, and the second pole module is disposed on another of the cover plates, or the first pole module and the second pole module are disposed on one of the plurality of cover plates at the same time.

[0015] In one embodiment, the battery shell also includes a pole module, and a first limiting structure is provided on the first side plate, the second side plate and at least one of the several cover plates, and the pole module has a second limiting structure that is positioned and matched with the first limiting structure.

[0016] In one embodiment, the battery shell includes an inner surface and an outer surface arranged opposite to each other, the battery shell is provided with a through hole penetrating the inner surface and the outer surface, and the first limiting structure includes a first positioning portion formed on the outer surface, and a second positioning portion formed on the inner surface;

[0017] The pole module comprises a first plastic plate, a second plastic plate, a pole block, a pole, a sealing ring and a pin member, the first plastic plate is attached to the outer surface and is provided with a first clamping portion that is engaged with the first positioning portion, the second plastic plate is attached to the inner surface and is provided with a second clamping portion that is engaged with the second positioning portion, the pole is passed through the through hole, the sealing ring elastically abuts between the hole wall of the through hole and the pole, the pin member is located in the battery cell accommodating cavity and is connected to the pole, the pole block is located outside the battery cell accommodating cavity and is connected to the pole, and the pole block is attached to the first plastic plate;

[0018] Among them, one of the first positioning portion and the second positioning portion is a limiting convex portion, and the other is a limiting concave portion, the first clamping portion is a limiting convex portion or a limiting concave portion adapted to the first positioning portion, and the second clamping portion is a limiting convex portion or a limiting concave portion adapted to the second positioning portion.

[0019] In a second aspect, the utility model further provides a battery, comprising a battery cell and a battery shell according to any one of the above embodiments, wherein the battery cell is disposed in a battery cell accommodating cavity of the battery shell.

[0020] In a third aspect, the utility model further provides an electrical device, the electrical device comprising a device body, a connecting pipe and a battery of any one of the above embodiments;

[0021] The battery is installed in the device body, and the battery shell also includes an explosion-proof valve, which is arranged on the first side plate, the second side plate and at least one of the several cover plates. One end of the connecting pipe is connected to the explosion-proof valve, and the other end extends to the outside of the device body.

[0022] The following beneficial effects are achieved by using the embodiments of the present invention:

[0023] The battery shell, battery and electrical equipment of the utility model are provided with a second limiting portion adapted to be connected with the first limiting portion on the cover plate, so that the outer side of the cover plate can be limited to be flush with the outer side of the shell, so as to improve the connection accuracy between the cover plate and the shell, and then facilitate the welding and fixing of the cover plate and the shell, so as to improve the welding quality and welding yield. In addition, by setting the first limiting portion, the rigidity of the shell can also be strengthened to reduce the deformation of the shell caused by welding, thereby reducing the deformation of the battery shell after welding, and reducing the risk of air leakage in the weld. Furthermore, since a plurality of openings are provided, it is easier to place the battery cell into the battery cell accommodating cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] 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 only 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.

[0025] in:

[0026] Figure 1 Schematic diagram of a battery in one embodiment.

[0027] Figure 2 for Figure 1 Exploded view of the battery shown.

[0028] Figure 3 for Figure 2 Enlarged schematic diagram of part A in the middle.

[0029] Figure 4 for Figure 1 Partial exploded view of the battery shown.

[0030] Figure 5 for Figure 4 Enlarged schematic diagram of part B in the middle.

[0031] Figure 6 for Figure 1 A cross-sectional view of the terminal module in the battery shown.

[0032] Figure 7 FIG. 4 is a schematic diagram of a battery in another embodiment.

[0033] Figure numbers: 100, shell; 110, first side plate; 120, second side plate; 130, battery cell accommodating chamber; 140, opening; 150, first limiting portion; 151, supporting portion; 152, extension section; 200, cover plate; 210, second limiting portion; 220, inner surface; 230, outer surface; 240, through hole; 250, first limiting structure; 251, first positioning portion; 252, second positioning portion; 260, injection hole; 310, first pole module; 320, second pole module; 311, first plastic plate; 3111, first clamping portion; 312, second plastic plate; 3121, second clamping portion; 313, pole block; 314, pole; 315, sealing ring; 316, pin member; 400, battery cell; 500, explosion-proof valve. DETAILED DESCRIPTION

[0034] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments 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.

[0035] It should be noted that all directional indications (such as up, down, left, right, front, back...) in the embodiments of the present invention are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0036] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the said features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0037] See also Figures 1 to 7The utility model provides a battery shell, which is used to encapsulate a battery cell 400. The battery shell includes a shell 100 and a plurality of cover plates 200. The shell 100 includes a first side plate 110 and a second side plate 120 fixed on the first side plate 110; the first side plate 110 and the second side plate 120 enclose a battery cell accommodating cavity 130 and a plurality of openings 140 communicating with the battery cell accommodating cavity 130; a first limiting portion 150 is provided at the opening 140, and a second limiting portion 210 adapted to be connected to the first limiting portion 150 is provided on the cover plate 200, and a plurality of cover plates 200 are respectively covered and fixed at the plurality of openings 140 to seal the battery cell accommodating cavity 130.

[0038] It is understandable that, since the cover plate 200 is provided with a second limiting portion 210 adapted to be connected to the first limiting portion 150, the outer side of the cover plate 200 can be limited to be flush with the outer side of the shell 100, so as to improve the connection accuracy between the cover plate 200 and the shell 100, and then facilitate the welding and fixing of the cover plate 200 and the shell 100, so as to improve the welding quality and welding yield rate. In addition, by setting the first limiting portion 150, the rigidity of the shell 100 can also be strengthened to reduce the deformation of the shell 100 caused by welding, thereby reducing the deformation of the battery shell after welding, and reducing the risk of air leakage in the weld. Furthermore, since a plurality of openings 140 are provided, it is easier to place the battery cell 400 into the battery cell accommodating cavity 130.

[0039] In one embodiment, see Figure 3 and Figure 6 The first limiting portion 150 includes a plurality of support portions 151 arranged at intervals, and the second limiting portion 210 abuts against the plurality of support portions 151, thereby limiting the outer side of the cover plate 200 to be flush with the outer side of the housing 100 through abutment and cooperation, thereby facilitating the welding and fixing of the cover plate 200 and the housing 100, thereby improving the welding quality and welding yield rate. Furthermore, since a plurality of support portions 151 are provided and arranged at intervals, the stability and reliability of the second limiting portion 210 supported on the support portion 151 can be improved.

[0040] Further, in the present embodiment, the plurality of support portions 151 are protruding structures formed in the battery cell accommodating cavity 130, and the second limiting portion 210 is accommodated in the battery cell accommodating cavity 130, so that the limiting cooperation between the support portion 151 and the second limiting portion 210 is realized inside the battery cell accommodating cavity 130. Specifically, the first limiting portion 150 further includes an extension section 152, and the plurality of support portions 151 are all connected to the extension section 152 and are integrally formed with the extension section 152, thereby increasing the structural strength of the first limiting portion 150. Of course, in other embodiments, the first limiting portion 150 may also be a continuously extending strip-shaped protrusion, and the second limiting portion 210 abuts against the strip-shaped protrusion.

[0041] In one embodiment, the shell 100 and the plurality of cover plates 200 are structural members made of stainless steel. The use of stainless steel can make the wall thickness of the shell 100 and the plurality of cover plates 200 thinner, thereby reducing the overall weight and manufacturing cost of the battery shell and ensuring that the structural strength of the battery shell is not reduced.

[0042] Furthermore, the thickness of the wall panels of the shell 100 and the cover plates 200 is not greater than 0.2 mm. Preferably, the thickness of the wall panels of the shell 100 and the cover plates 200 can be selected to be between 0.05 mm and 0.15 mm. Specifically, the thickness of the wall panels of the shell 100 and the cover plates 200 can be selected to be 0.01 mm, 0.03 mm, 0.05 mm, 0.08 mm, 0.10 mm, 0.12 mm, 0.15 mm, 0.17 mm or 0.20 mm. By thinning the wall panels, the internal space of the battery shell is increased, that is, the layout space of the battery cell 400 is increased, thereby improving the energy density of the battery.

[0043] In this example, see Figure 1 and Figure 2 , two second side plates 120 are provided and are arranged in parallel on both sides of the first side plate 110, two of the plurality of cover plates 200 are arranged in parallel on the other two sides of the first side plate 110, the housing 100 is a U-shaped structure formed by bending after stamping the plate, and the cover plate 200 is a flat plate structure formed by cutting after stretching the plate. The plurality of cover plates 200 are connected to the housing 100 by seam welding. The length of the cover plate 200 can be selected to be 400 mm to 600 mm. The cover plate 200 is provided with a liquid injection hole 260.

[0044] In one embodiment, the battery case further includes a first pole module 310 and a second pole module 320; see Figure 7 , a first pole module 310 is disposed on one of the plurality of cover plates 200, and a second pole module 320 is disposed on another cover plate 200. Alternatively, refer to Figure 1 and Figure 2 , a first pole module 310 and a second pole module 320 are simultaneously arranged on one of the plurality of cover plates 200. By so configuring, the first pole module 310 and the second pole module 320 can be flexibly arranged according to the use requirements of the battery shell.

[0045] See also Figure 1 and Figure 2 When the first pole module 310 and the second pole module 320 are simultaneously provided on one of the cover plates 200 among the plurality of cover plates 200, that is, the first pole module 310 and the second pole module 320 are arranged on the same side of the battery shell, the battery shell can be applied to square batteries and also to start-stop batteries.

[0046] See also Figure 7 When a first pole module 310 is disposed on one of the plurality of cover plates 200 and a second pole module 320 is disposed on another cover plate 200, for example, the first pole module 310 and the second pole module 320 are respectively arranged on the left plate and the right plate of the battery shell, and the battery shell can be applied to blade batteries, specifically, to short blade batteries of 400 mm to 600 mm. Preferably, the distance between the first pole module 310 and the second pole module 320 is not greater than 600 mm, which is convenient for different application scenarios.

[0047] In one embodiment, see Figures 4 to 6 The battery shell also includes a pole module. A first limiting structure 250 is provided on at least one of the first side plate 110, the second side plate 120 and the plurality of cover plates 200. The pole module has a second limiting structure that is positioned and matched with the first limiting structure 250, so that the pole module can be stably installed on the battery shell.

[0048] Further, the battery shell includes an inner surface 220 and an outer surface 230 that are arranged opposite to each other, and a through hole 240 is provided on the battery shell that penetrates the inner surface 220 and the outer surface 230. The first limiting structure 250 includes a first positioning portion 251 formed on the outer surface 230, and a second positioning portion 252 formed on the inner surface 220; the pole module includes a first plastic plate 311, a second plastic plate 312, a pole block 313, a pole 314, a sealing ring 315 and a pin member 316. The first plastic plate 311 is attached to the outer surface 230 and is provided with a first The positioning portion 251 is engaged with the first engaging portion 3111 for positioning, the second plastic plate 312 is attached to the inner surface 220, and is provided with a second engaging portion 3121 engaged with the second positioning portion 252 for positioning, the pole 314 is passed through the through hole 240, the sealing ring 315 elastically abuts between the hole wall of the through hole 240 and the pole 314, the pin member 316 is located in the battery cell accommodating cavity 130 and connected to the pole 314, the pole block 313 is located outside the battery cell accommodating cavity 130 and connected to the pole 314, and the pole block 313 is attached to the first plastic plate 311. Specifically, the pin member 316 is welded to the pole 314, and the pole block 313 is riveted and welded to the pole 314.

[0049] By setting the pin member 316, the battery case can be applied to the start-stop battery. The pin member 316 has a fuse protection structure setting, which can make the battery case suitable for full-ear high-rate batteries.

[0050] In this embodiment, one of the first positioning portion 251 and the second positioning portion 252 is a limiting protrusion, and the other is a limiting recess. The first clamping portion 3111 is a limiting protrusion or a limiting recess that matches the first positioning portion 251, and the second clamping portion 3121 is a limiting protrusion or a limiting recess that matches the second positioning portion 252. The pole module is stably installed on the battery shell through the cooperation of the limiting protrusion and the limiting recess.

[0051] Specifically, the first positioning portion 251 and the second positioning portion 252 are both in a square ring shape, so that the pole module can not only be positioned on the cover plate 200 , but also prevent the pole module from rotating relative to the cover plate 200 .

[0052] See also Figures 1 to 7 , the utility model embodiment also provides a battery, which includes a battery cell 400 and a battery shell of any of the above embodiments, and the battery cell 400 is arranged in the battery cell accommodating cavity 130 of the battery shell. It can be understood that, since the cover plate 200 is provided with a second limiting portion 210 adapted to be connected with the first limiting portion 150, the outer side of the cover plate 200 can be limited to be flush with the outer side of the shell 100, so as to improve the connection accuracy between the cover plate 200 and the shell 100, and then facilitate the welding and fixing of the cover plate 200 and the shell 100, so as to improve the welding quality and welding yield rate. In addition, by setting the first limiting portion 150, the rigidity of the shell 100 can also be strengthened to reduce the deformation of the shell 100 caused by welding, thereby reducing the deformation of the battery shell after welding, and reducing the risk of leakage in the weld. Further, since a plurality of openings 140 are provided, it is more convenient to put the battery cell 400 into the battery cell accommodating cavity 130.

[0053] See also Figures 1 to 7 The embodiment of the utility model also provides an electrical device, which includes a device body, a connecting pipe and a battery of any of the above embodiments; the battery is installed in the device body, and the battery shell also includes an explosion-proof valve 500, which is arranged on at least one of the first side plate 110, the second side plate 120 and the plurality of cover plates 200. One end of the connecting pipe is connected to the explosion-proof valve 500, and the other end extends to the outside of the device body. When the internal air pressure of a single cell reaches the upper limit of the explosion-proof valve 500, the explosion-proof valve 500 is depressurized and the gas is discharged from the connecting pipe, which does not affect the normal operation of the surrounding batteries and the overall PACK box, effectively ensuring the safety of the battery and increasing the service life of the battery.

[0054] When the electrical equipment is an electric vehicle, the connecting pipeline can be an exhaust pipe. When the explosion-proof valve 500 is abnormally opened, the abnormality can be discharged through the pipeline to avoid personal injury. Of course, the electrical equipment can also be other devices such as energy storage base stations.

[0055] The above disclosure is only a preferred embodiment of the present invention, and certainly cannot be used to limit the scope of rights of the present invention. Therefore, equivalent changes made according to the claims of the present invention are still within the scope covered by the present invention.

Claims

1. A battery case, characterized in that: The battery case comprises: A housing (100), the housing (100) comprising a first side plate (110), and a second side plate (120) fixedly mounted on the first side plate (110); the first side plate (110) and the second side plate (120) enclose a battery cell accommodating cavity (130) and a plurality of openings (140) communicating with the battery cell accommodating cavity (130); a first limiting portion (150) is provided at the opening (140); and A plurality of cover plates (200), each of which is provided with a second limiting portion (210) adapted to be connected to the first limiting portion (150), and the plurality of cover plates (200) are respectively covered and fixed on the plurality of openings (140) to seal the battery cell accommodating cavity (130).

2. The battery case according to claim 1, characterized in that: The first limiting portion (150) comprises a plurality of support portions (151) arranged at intervals, and the second limiting portion (210) abuts against the plurality of support portions (151).

3. The battery case according to claim 2, characterized in that: The plurality of support portions (151) are protruding structures formed in the battery cell accommodating cavity (130).

4. The battery case according to claim 2, characterized in that: The first limiting portion (150) further comprises an extension section (152), and the plurality of supporting portions (151) are all connected to the extension section (152) and are integrally formed with the extension section (152).

5. The battery case according to claim 1, characterized in that: The shell (100) and the plurality of cover plates (200) are structural members made of stainless steel, and the thickness of the wall plates of the shell (100) and the plurality of cover plates (200) is no more than 0.2 mm.

6. The battery case according to claim 1, characterized in that: The battery case further comprises a first pole module (310) and a second pole module (320); One of the cover plates (200) is provided with the first pole module (310), and another of the cover plates (200) is provided with the second pole module (320); or one of the cover plates (200) is provided with both the first pole module (310) and the second pole module (320).

7. The battery case according to claim 1, characterized in that: The battery case also includes a pole module, wherein the first side plate (110), the second side plate (120) and at least one of the cover plates (200) are provided with a first limiting structure (250), and the pole module has a second limiting structure that is positioned and matched with the first limiting structure (250).

8. The battery case according to claim 7, characterized in that: The battery shell comprises an inner surface (220) and an outer surface (230) which are arranged opposite to each other, the battery shell is provided with a through hole (240) which penetrates the inner surface (220) and the outer surface (230), and the first limiting structure (250) comprises a first positioning portion (251) formed on the outer surface (230), and a second positioning portion (252) formed on the inner surface (220); The pole module comprises a first plastic plate (311), a second plastic plate (312), a pole block (313), a pole (314), a sealing ring (315) and a pin (316); the first plastic plate (311) is attached to the outer surface (230) and is provided with a first engaging portion (3111) engaged with the first positioning portion (251) for positioning; the second plastic plate (312) is attached to the inner surface (220) and is provided with a second engaging portion (3111) engaged with the second positioning portion (252) for positioning The electrode (314) is inserted into the through hole (240), the sealing ring (315) elastically abuts between the hole wall of the through hole (240) and the electrode (314), the pin (316) is located in the battery cell accommodating cavity (130) and connected to the electrode (314), the pole block (313) is located outside the battery cell accommodating cavity (130) and connected to the pole (314), and the pole block (313) is attached to the first plastic plate (311); Among them, one of the first positioning portion (251) and the second positioning portion (252) is a limiting convex portion, and the other is a limiting concave portion, the first engaging portion (3111) is a limiting convex portion or a limiting concave portion adapted to the first positioning portion (251), and the second engaging portion (3121) is a limiting convex portion or a limiting concave portion adapted to the second positioning portion (252).

9. A battery, characterized in that: The battery comprises a battery cell (400) and a battery shell according to any one of claims 1 to 8, wherein the battery cell (400) is arranged in a battery cell accommodating cavity (130) of the battery shell.

10. An electrical device, characterized in that: The electrical equipment comprises an equipment body, a connecting pipe and the battery according to claim 9; The battery is installed in the device body, and the battery shell also includes an explosion-proof valve (500). The explosion-proof valve (500) is arranged on the first side plate (110), the second side plate (120) and at least one of the cover plates (200). One end of the connecting pipe is connected to the explosion-proof valve (500), and the other end extends to the outside of the device body.

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