Battery cell shell, battery cell pole and button type battery cell

Abstract

The utility model discloses a kind of electric core shell, electric core pole and buckle type electric core, it is related to buckle type electric core technical field.The electric core shell includes side wall, cover plate and bottom plate, cover plate is connected in one end of side wall, bottom plate is connected in the other end of side wall, cover plate is provided with through hole along its thickness direction, cavity is formed in electric core shell, cover plate is recessed towards bottom plate.The electric core shell, when the gas pressure in electric core shell increases after the completion of electric core formation, gas pressure acts on cover plate, and cover plate is recessed towards bottom plate, relative to the prior art cover plate as plane structure technical solution, the cover plate structure strength of the application is higher, to reduce the probability of cover plate damage of electric core shell.

Description

Technical Field

[0001] This utility model belongs to the field of button cell technology, and particularly relates to a cell housing, cell terminals and a button cell. Background Technology

[0002] Button cells are a common type of rechargeable battery. In actual use, the terminals and the cover plate have opposite polarities. After the cell is formed, the air pressure inside the cell casing increases. Since the existing cell casing cover plate has a planar structure and low structural strength, the air pressure inside the cell casing pushes upward against the cover plate, which can easily lead to damage to the cover plate. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery cell housing, battery cell terminals and button cell, which are prone to damage to the cover plates of existing battery cell housings.

[0004] To address the aforementioned issues, this utility model provides a battery cell housing, comprising a side wall, a cover plate, and a bottom plate. The cover plate is connected to one end of the side wall, and the bottom plate is connected to the other end of the side wall. The cover plate has a through hole extending along its thickness direction, and a cavity is formed inside the battery cell housing. The cover plate is recessed toward the bottom plate.

[0005] As a further improvement to the above technical solution:

[0006] Optionally, the base plate is recessed toward the cover plate.

[0007] Optionally, both the cover plate and the base plate are arc-shaped; and / or, the curvature of both the cover plate and the base plate is 3° to 20°.

[0008] Optionally, the height difference between the lowest and highest points of the cover plate is 0.1 mm to 0.5 mm; and / or, the height difference between the lowest and highest points of the base plate is 0.1 mm to 0.5 mm.

[0009] Optionally, the thickness of the base plate is 0.12 mm to 0.2 mm; and / or, the thickness of the cover plate is 0.12 mm to 0.2 mm.

[0010] Optionally, both the cover plate and the bottom plate are sealed to the side wall using hot melt adhesive.

[0011] On the other hand, this utility model embodiment provides a battery cell terminal post applied to the battery cell housing as described above, including a connecting plate, the connecting plate being disposed in the cavity, the cover plate being insulated from the connecting plate, the connecting plate closing the through hole, and the connecting plate being recessed toward the bottom plate.

[0012] As a further improvement to the above technical solution:

[0013] Optionally, the pole post further includes a column body, which is disposed on the upper surface of the connecting plate and passes through the through hole.

[0014] Optionally, the connecting plate is arc-shaped; and / or, the arc of the connecting plate is between 3° and 20°.

[0015] In another aspect, this utility model embodiment provides a button cell, including a core, a cell housing as described above, and a cell terminal as described above. The core is installed in the cavity, one pole of the core is electrically connected to the connecting plate, and the other pole of the core is electrically connected to the cell housing.

[0016] The present invention provides a battery cell housing, battery cell terminals, and button cell, which, compared with the prior art, have at least the following beneficial effects: Because the cover plate of the battery cell housing is recessed towards the bottom plate, the air pressure inside the battery cell housing increases after the battery cell is formed. This air pressure acts on the cover plate, and the cover plate recessed towards the bottom plate has higher structural strength than existing cover plate designs with planar structures, thereby reducing the probability of damage to the cover plate of the battery cell housing. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the structure of the battery cell housing provided in one embodiment of the present invention;

[0019] Figure 2 This is a schematic diagram of the structure of a button cell provided in one embodiment of the present invention.

[0020] The reference numerals in the accompanying drawings are as follows:

[0021] 110. Cell terminal; 120. Cell housing; 121. Side wall; 122. Cover plate; 123. Base plate; 124. Through hole; 130. Insulation layer; 200. Electrode core. Detailed Implementation

[0022] To make the technical problems solved, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0023] In the description of this utility model, it should be understood that the terms "longitudinal," "radial," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "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 this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. In the description of this utility model, unless otherwise stated, "a plurality of" means two or more.

[0024] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] like Figures 1 to 2 As shown, an embodiment of the present invention provides a battery cell housing 120, which includes a side wall 121, a cover plate 122 and a bottom plate 123. The cover plate 122 is connected to one end of the side wall 121 and the bottom plate 123 is connected to the other end of the side wall 121. The cover plate 122 has a through hole 124 extending along its thickness direction. A cavity is formed inside the battery cell housing 120, and the cover plate 122 is recessed toward the bottom plate.

[0026] In one embodiment of this utility model, the battery cell housing 120 has cover plates 122 that are recessed toward the bottom plate 123. After the battery cell is formed, the air pressure inside the battery cell housing 120 increases, and the air pressure acts on the cover plates 122. Compared with the existing technical solutions where the cover plate 122 is a planar structure, the cover plate 122 of this application has higher structural strength, thereby reducing the probability of damage to the cover plate 122 of the battery cell housing 120.

[0027] Another embodiment of the present invention provides a battery cell terminal 110, which is applied to the battery cell housing 120 described above. The battery cell terminal 110 includes a connecting plate disposed in the cavity. The cover plate 122 is insulated from the connecting plate. The connecting plate closes the through hole 124 and is recessed toward the bottom plate 123.

[0028] Since both the cover plate 122 and the connecting plate are recessed towards the bottom plate 123, the air pressure inside the cell housing 120 increases after the cell is formed. The air pressure acts on the connecting plate and the cover plate 122. Compared with the existing technical solution where the cover plate 122 is a planar structure, the cover plate 122 of this application has higher structural strength, thereby reducing the probability of damage to the cover plate 122 of the cell housing 120.

[0029] In this embodiment, as Figures 1 to 2 As shown, both the cover plate 122 and the connecting plate are arc-shaped. The curvature of both the cover plate 122 and the connecting plate is between 3° and 20°. The height difference e between the lowest and highest points of the cover plate 122 is between 0.1 mm and 0.5 mm. The lower surface of the cover plate 122 and the upper surface of the connecting plate are bonded together by an insulating layer 130. The arc-shaped structure of the cover plate 122 and the connecting plate provides strong structural strength, enabling them to withstand high air pressure within the cavity.

[0030] After formation, the internal air pressure of the battery cell increases, pushing upward against the connecting plate. This further increases the sealing performance between the connecting plate and the cover plate 122. Moreover, the longer the battery cell is used, the more gas is generated inside its battery cell casing 120, resulting in a better sealing effect.

[0031] One embodiment of this utility model provides a battery cell housing 120, such as... Figures 1 to 2 As shown, the base plate 123 is recessed towards the cover plate 122. Compared with the existing technical solutions where the base plate 123 is a planar structure, the base plate 123 of this application has higher structural strength, thereby reducing the probability of damage to the base plate 123 of the cell casing 120.

[0032] In this embodiment, the base plate 123 is arc-shaped. The curvature of the base plate 123 is between 3° and 20°. The height difference E between the lowest and highest points of the base plate 123 is between 0.1mm and 0.5mm. The insulating layer 130 is made of hot melt adhesive, which is heat-pressed to the cover plate 122 and the connecting plate. The thickness of the hot melt adhesive after bonding is between 0.05mm and 0.1mm to prevent the edges of the connecting plate from piercing the hot melt adhesive and causing a short circuit. The thickness of the connecting plate is between 0.12mm and 0.2mm to ensure the strength of the shell.

[0033] The battery cell housing 120 provided in one embodiment of the present invention includes a post 110, which further includes a post body. The post body is disposed on the upper surface of the connecting plate and passes through the through hole 124. The post body and the hole wall of the through hole 124 are fitted with a clearance fit.

[0034] In addition, such as Figures 1 to 2 As shown, another embodiment of this utility model provides a button cell, which includes an electrode core 200, a cell terminal post 110 as provided in any of the above embodiments, and a cell housing 120 as provided in any of the above embodiments. The electrode core 200 is installed in the cavity, one pole of the electrode core 200 is electrically connected to a connecting plate, and the other pole of the electrode core 200 is electrically connected to the cell housing 120. The specific structure of the cell housing 120 is the same as described in the above embodiments. Since this button cell adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0035] The above-described embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this utility model, and should all be included within the protection scope of this utility model.

Claims

1. A battery cell housing, characterized in that, It includes a sidewall, a cover plate, and a bottom plate. The cover plate is connected to one end of the sidewall, and the bottom plate is connected to the other end of the sidewall. The cover plate has a through hole extending along its thickness direction. A cavity is formed inside the battery cell housing, and the cover plate is recessed toward the bottom plate.

2. The cell housing according to claim 1, characterized in that, The bottom plate is recessed toward the cover plate.

3. The cell housing according to claim 2, characterized in that, Both the cover plate and the base plate are arc-shaped; and / or, the curvature of both the cover plate and the base plate is between 3° and 20°.

4. The cell housing according to claim 3, characterized in that, The height difference between the lowest and highest points of the cover plate is 0.1 mm to 0.5 mm; and / or, the height difference between the lowest and highest points of the base plate is 0.1 mm to 0.5 mm.

5. The cell housing according to claim 1, characterized in that, The thickness of the base plate is 0.12 mm to 0.2 mm; and / or the thickness of the cover plate is 0.12 mm to 0.2 mm.

6. The cell housing according to claim 1, characterized in that, Both the cover plate and the bottom plate are sealed to the side wall with hot melt adhesive.

7. A cell terminal post, applied to a cell housing as described in any one of claims 1 to 6, characterized in that, It includes a connecting plate disposed in the cavity, the cover plate is insulated from the connecting plate, the connecting plate closes the through hole, and the connecting plate is recessed toward the bottom plate.

8. The cell terminal according to claim 7, characterized in that, The pole also includes a column, which is disposed on the upper surface of the connecting plate and passes through the through hole.

9. The cell terminal according to claim 7, characterized in that, The connecting plate is arc-shaped; and / or the arc of the connecting plate is between 3° and 20°.

10. A button cell, characterized in that, The battery includes a core, a battery housing as described in any one of claims 1 to 6, and a battery terminal as described in any one of claims 7 to 9. The core is installed in the cavity, one pole of the core is electrically connected to the connecting plate, and the other pole of the core is electrically connected to the battery housing.

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