Battery shell and battery

Abstract

The utility model relates to a battery shell and a battery. The shell comprises a shell body and a cover plate, the shell comprises side walls, a containing cavity for containing the battery cell is defined by the side walls, and the containing cavity is provided with an opening; the cover plate comprises a main plate body, at least two positioning supporting feet are arranged on the main plate body, a clamping space is defined by all the positioning supporting feet, the shell is located in the clamping space, the opening is sealed and covered by the main plate body, and the positioning supporting feet are all attached to the outer wall of the shell. The utility model also discloses a battery. The cover plate and the shell can be effectively positioned, relative deviation of the position of the cover plate during follow-up welding can be effectively avoided, welding operation is better facilitated, the assembling and welding efficiency is improved, and the machining precision is better guaranteed.

Description

Technical Field

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

[0002] With the continuous development of small portable electronic devices, the battery components that power these devices have also become increasingly miniaturized, leading to the emergence of compact button batteries. Button batteries offer high energy density, excellent storage performance, low self-discharge, and a long lifespan. Existing button battery casings typically consist of a housing and a cover plate that seals the housing. The cover plate and housing are secured by welding, but this can easily shift during assembly and welding, making it difficult to operate, unable to guarantee assembly and welding accuracy, and compromising processing efficiency, making it impossible to meet production requirements. Utility Model Content

[0003] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that the cover plate and the shell are easily offset during assembly and welding, thereby affecting the operating efficiency and accuracy.

[0004] In order to solve the above technical problems, the utility model provides a battery housing, comprising:

[0005] A housing, the housing comprising side walls, the side walls enclosing a housing cavity for accommodating the battery cell, the housing cavity having an opening;

[0006] The cover plate includes a main board body, and at least two positioning legs are provided on the main board body. All the positioning legs enclose a card-joining space. The shell is located in the card-joining space and the main board body covers the opening. The positioning legs are all attached to the outer wall of the shell.

[0007] In one embodiment of the present invention, the main board and the shell are both rectangular, the rectangular main board has four side edges connected end to end, and the positioning legs are provided on at least two of the side edges.

[0008] In one embodiment of the present invention, each of the side edges is provided with a positioning foot.

[0009] In one embodiment of the present invention, the positioning legs are provided on both sides of the corners of the rectangular main board.

[0010] In one embodiment of the present invention, the height of the positioning foot is 0.25 to 1 times the height of the housing.

[0011] In one embodiment of the present utility model, the battery casing also includes a negative electrode member and a positive electrode member, the negative electrode member is connected to the side wall, a first through hole is provided on the side wall, the positive electrode member includes an end plate portion and a column portion, the column portion passes through the first through hole, the end plate portion is located inside or outside the shell, and the end plate portion is hot-melt connected to the side wall through the insulating sheet.

[0012] In one embodiment of the present invention, an explosion-proof valve is connected to the main board.

[0013] In one embodiment of the present invention, the negative electrode member is made of nickel sheet, the side wall and the cover plate are both made of steel plate, and the negative electrode member is welded to the outer wall of the side wall.

[0014] In one embodiment of the present invention, the thickness of the side wall is 30-200 μm.

[0015] A battery comprises a battery cell and the battery casing described in any one of the above items, wherein the battery cell is located in the accommodating cavity, the positive electrode of the battery cell is electrically connected to the positive electrode member, and the negative electrode of the battery cell is electrically connected to the negative electrode member.

[0016] In one embodiment of the present invention, the battery cell is rectangular.

[0017] The above technical solution of the utility model has the following advantages compared with the prior art:

[0018] The battery casing and battery described in the present invention can effectively realize the positioning of the cover plate and the shell, and can effectively avoid the relative displacement of the cover plate position during subsequent welding, which is more conducive to the welding operation, improves the efficiency of assembly welding, and is more conducive to ensuring assembly and welding accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to make the content of the present invention more clearly understood, the present invention is further described in detail below based on specific embodiments of the present invention in conjunction with the accompanying drawings.

[0020] Figure 1 It is a structural schematic diagram of the battery of the present utility model;

[0021] Figure 2 yes Figure 1 A top view of the battery structure shown;

[0022] Figure 3 yes Figure 2 a right side view of the structure shown;

[0023] Figure 4 yes Figure 2 a left side view of the structure shown;

[0024] Figure 5 yes Figure 1 Exploded view of the structure shown;

[0025] Figure 6 yes Figure 5 Schematic diagram of the structure of the middle cover;

[0026] Figure 7 is a schematic diagram of the second structure of the cover;

[0027] Figure 8 is a schematic diagram of the third structure of the cover;

[0028] Description of the accompanying drawings:

[0029] 10. Housing; 101. Side wall; 1011. First through hole; 1012. Liquid injection hole; 102. Accommodating cavity; 1021. Opening;

[0030] 20, cover plate; 201, main board; 2011, side; 202, positioning foot;

[0031] 30. Negative electrode;

[0032] 40, positive electrode; 401, end plate; 402, column;

[0033] 50. Insulation sheet; 501. Mounting hole;

[0034] 60. Liquid blocking plug;

[0035] 70. Battery cell. DETAILED DESCRIPTION

[0036] The present invention is further described below with reference to the accompanying drawings and specific embodiments to enable those skilled in the art to better understand and implement the present invention. However, the embodiments described are not intended to limit the present invention. It is apparent that the embodiments described are only some of the embodiments of the present disclosure, and not all of them. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present disclosure, its application, or use.

[0037] In the description of the present invention, it should be understood that the terms "vertical", "upper", "lower", "top", "side", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0038] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections, electrical connections; direct connections, indirect connections through an intermediate medium, and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0039] The following will be combined Figures 1-8 , the battery structure of this embodiment is further described.

[0040] Example

[0041] See Figure 1-Figure 5 , this embodiment discloses a battery housing, including a shell 10 and a cover plate 20;

[0042] The housing 10 includes a side wall 101 , which encloses a housing cavity 102 for accommodating the battery cell 70 . The housing cavity 102 has an opening 1021 .

[0043] The cover 20 includes a main body 201 , on which at least two positioning legs 202 are provided. All positioning legs 202 enclose a snap-fit ​​space. The shell 10 is located in the snap-fit ​​space and the main body 201 covers the opening 1021 . The positioning legs 202 are all attached to the outer wall of the shell 10 .

[0044] The above structure, through the setting of the positioning support feet 202, enables the shell 10 to be located in the clamping space, effectively realizes the positioning of the cover plate 20, and fixes the relative position of the cover plate 20 and the shell 10, which can effectively avoid the relative displacement of the position of the cover plate 20 during the subsequent welding of the cover plate 20 and the shell 10, thereby effectively improving the positioning accuracy of the cover plate 20, being more conducive to the welding operation, improving the efficiency of assembly welding, and being more conducive to ensuring the assembly and welding accuracy.

[0045] Furthermore, the main board body 201 and the positioning legs 202 are integrally formed to better ensure structural stability and strength.

[0046] The main body 201 and the positioning legs 202 can both be made of steel plates.

[0047] In some embodiments, as Figure 1 and Figure 5 As shown, the main board body 201 and the housing 10 are both rectangular. The rectangular main board body 201 has four side edges 2011 connected end to end. At least two side edges 2011 are provided with positioning legs 202 to ensure positioning reliability.

[0048] For example, Figure 7 As shown, positioning legs 202 may be provided on only two side edges 2011, with one or two positioning legs 202 provided on each side edge 2011; Figure 8 As shown, positioning legs 202 may also be provided on the three side edges 2011, and one or two positioning legs 202 may be provided on each side edge 2011. Figure 6 As shown, positioning feet 202 may also be provided on all four side edges 2011 .

[0049] The housing 10 and the main body 201 are rectangular, which is more conducive to the positioning and processing of the two.

[0050] Furthermore, each side edge 2011 is provided with a positioning foot 202 .

[0051] In order to better ensure positioning stability and reliability, at least two positioning legs 202 are provided on each side 2011 .

[0052] Preferably, two positioning feet 202 are provided on each side 2011 , and the two positioning feet 202 on each side 2011 are respectively provided close to both ends.

[0053] Furthermore, if Figure 6 As shown, positioning feet 202 are provided on both sides of the corners of the rectangular main board body 201 to ensure that the positioning feet 202 are set close to the corners, thereby realizing the positioning of the corners of the shell 10, thereby better ensuring the positioning effect of the cover 20 and also helping to improve the positioning stability.

[0054] In some embodiments, the height of the positioning foot 202 is 0.25 to 1 times the height of the shell 10. If the height is too low, it is not conducive to ensuring the positioning reliability. If the height is too high, it will increase the battery size, and it will not be conducive to the processing of the positioning foot 202 and it will be prone to deformation. The above height range can better ensure the positioning effect of the positioning foot 202 on the shell 10.

[0055] In some embodiments, as Figure 1 and Figure 5 As shown, the battery housing also includes a negative electrode component 30 and a positive electrode component 40. The negative electrode component 30 is connected to the side wall 101, and a first through hole 1011 is provided on the side wall 101. The positive electrode component 40 includes an end plate portion 401 and a column portion 402. The column portion 402 passes through the first through hole 1011. The end plate portion 401 is located outside the shell 10, and the end plate portion 401 is hot-melt connected to the side wall 101 through an insulating sheet 50.

[0056] In other embodiments, the end plate portion 401 may also be located inside the housing 10 , and the end plate portion 401 is connected to the side wall 101 through thermal melting of the insulating sheet 50 .

[0057] The housing 10 can be made of a conductive material, and the insulating sheet 50 is used to insulate and separate the positive electrode member 40 from the housing 10. In this case, the housing 10 and the negative electrode member 30 can be used as an integral negative electrode, and the negative electrode of the battery cell 70 can be electrically connected to the negative electrode member 30 through the housing 10.

[0058] The end plate 401 of the positive electrode member 40 is connected to one side of the insulating sheet 50 by heat-melting, and the side wall 101 is connected to the other side of the insulating sheet 50 by heat-melting. The end plate 401 is connected to the insulating sheet 50 and the side wall 101 by heat-melting, rather than riveting, which simplifies the battery assembly process and makes the battery structure simpler. In addition, the use of a heat-melting connection structure when connecting the end plate 401 to the insulating sheet 50 and the side wall 101 can also effectively eliminate gaps between the end plate 401 and the insulating sheet 50, and between the insulating sheet 50 and the side wall 101, thereby effectively improving the sealing performance of the entire housing.

[0059] The insulating sheet 50 can be made of an insulator made of non-metallic materials. To further ensure the hot-melt effect, the insulating sheet 50 can be made of polypropylene material (PP plastic).

[0060] Furthermore, the insulating sheet 50 is located between the end plate portion 401 and the side wall 101 . The insulating sheet 50 is provided with a mounting hole 501 . The column portion 402 passes through the mounting hole 501 and the first through hole 1011 in sequence to better ensure connection reliability.

[0061] The shapes of the end plate portion 401 and the insulating sheet 50 may be circular, elliptical, or other shapes.

[0062] In some embodiments, an explosion-proof valve (not shown) is connected to the main body 201. Figure 1 and Figure 5 As shown, since the positive electrode member 40 is mounted on the side wall 101 of the housing 10 rather than on the cover plate 20 , the explosion-proof valve and the positive electrode member 40 are also located on different components, which is more conducive to the arrangement and processing of the explosion-proof valve.

[0063] Furthermore, the negative electrode member 30 is made of nickel sheet, and the side wall 101 and cover plate 20 are both made of steel plate. The negative electrode member 30 is welded to the outer wall of the side wall 101. In this case, the housing 10 and cover plate 20 are both conductive components, and together with the negative electrode member 30, they serve as the negative electrode. The side wall 101 is made of steel plate, which is a different material from the negative electrode member 30. This facilitates welding of the negative electrode member 30 and the side wall 101, ensuring a good welding effect.

[0064] The steel plate may be a stainless steel plate, and the positive electrode member 40 may be made of aluminum.

[0065] In some embodiments, the thickness of the side wall 101 is 30-200 μm to ensure structural rigidity while also ensuring that the thickness is not too large so that the battery has sufficient capacity and the battery can be lightweight.

[0066] Furthermore, the thickness of the main body 201 is not greater than the thickness of the side wall 101 .

[0067] In some embodiments, a liquid injection hole 1012 is further provided on the side wall 101 , and a liquid blocking plug 60 is connected to the liquid injection hole 1012 , so as to facilitate injection of electrolyte into the accommodating cavity 102 through the hole.

[0068] This embodiment also discloses a battery, including a battery cell 70 and a battery casing as described above, wherein the battery cell 70 is located in the accommodating cavity 102, the positive electrode of the battery cell 70 is electrically connected to the positive electrode member 40, and the negative electrode of the battery cell 70 is electrically connected to the negative electrode member 30.

[0069] For example, generally, the battery cell 70 has a positive ear and a negative ear. The positive ear serves as the positive electrode of the battery cell 70, and the negative ear serves as the negative electrode of the battery cell 70. When connecting, the positive ear of the battery cell 70 and the positive electrode component 40 can be connected to one end of the shell 10, and the negative ear of the battery cell 70 can be connected to the shell 10.

[0070] Furthermore, the battery cell 70 is rectangular, which is more conducive to heat dissipation and has a higher energy density, and is also more conducive to stacking.

[0071] When assembling the battery in the above embodiment, after placing the battery cell 70 in the accommodating cavity 102 of the shell 10, it is necessary to complete the installation of the cover plate 20 to seal the opening 1021 of the shell 10. At this time, the main board 201 needs to be sealed at the above opening 1021 first, and each positioning leg 202 is made to fit on the outer wall of the shell 10, that is, the shell 10 is located in the clamping space enclosed by each positioning leg 202, thereby realizing the positioning of the shell 10, so that the position between the cover plate 20 and the shell 10 is relatively fixed, and then the edge of the main board 201 and the edge of the shell 10 can be welded together. Since the position between the cover plate 20 and the shell 10 is relatively fixed before welding, the cover plate 20 will not be offset, which is more conducive to the subsequent welding operation, thereby improving the welding efficiency and accuracy.

[0072] All of the above optional technical solutions can be combined in any way to form optional embodiments of the present invention, that is, any multiple embodiments can be combined to meet the needs of different application scenarios. They are all within the scope of protection of this application and will not be described in detail here.

[0073] It should be noted that the above embodiments are merely examples for clarity of explanation and are not intended to limit the implementation methods. Those skilled in the art will appreciate that other variations or modifications can be made based on the above description. It is not necessary and impossible to enumerate all implementation methods here. Obvious variations or modifications arising therefrom remain within the scope of protection of the present invention.

Claims

1. A battery housing, characterized in that: include, A housing, the housing comprising side walls, the side walls enclosing a housing cavity for accommodating the battery cell, the housing cavity having an opening; The cover plate includes a main board body, and at least two positioning legs are provided on the main board body. All the positioning legs enclose a card-joining space. The shell is located in the card-joining space and the main board body covers the opening. The positioning legs are all attached to the outer wall of the shell.

2. The battery housing according to claim 1, wherein: The main board and the shell are both rectangular. The rectangular main board has four side edges connected end to end, and the positioning legs are provided on at least two of the side edges.

3. The battery housing according to claim 2, wherein: The positioning legs are provided on each of the side edges.

4. The battery housing according to claim 3, wherein: The positioning legs are provided on both sides of the corners of the rectangular main board.

5. The battery housing according to claim 1, wherein: The height of the positioning feet is 0.25 to 1 times the height of the shell.

6. The battery housing according to claim 1, wherein: It also includes a negative electrode member and a positive electrode member, the negative electrode member is connected to the side wall, a first through hole is provided on the side wall, the positive electrode member includes an end plate portion and a column portion, the column portion passes through the first through hole, the end plate portion is located inside or outside the shell, and the end plate portion is hot-melt connected to the side wall through an insulating sheet.

7. The battery housing according to claim 6, wherein: An explosion-proof valve is connected to the main board body.

8. The battery housing according to claim 6, wherein: The negative electrode member is made of nickel sheet, the side wall and the cover plate are both made of steel plate, and the negative electrode member is welded to the outer wall of the side wall.

9. The battery housing according to claim 1, wherein: The thickness of the side wall is 30 to 200 μm.

10. A battery, characterized in that: The battery comprises a battery cell and a battery casing according to any one of claims 1 to 9, wherein the battery cell is located in the accommodating cavity, the positive electrode of the battery cell is electrically connected to the positive electrode member, and the negative electrode of the battery cell is electrically connected to the negative electrode member.

11. The battery according to claim 10, characterized in that: The battery core is rectangular.

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