Battery cell housing and button cell

Abstract

The utility model discloses a kind of electric core shell and buckle type electric core, it is related to buckle type electric core technical field.The electric core shell includes pole, shell body, extension and insulating layer, the cover plate of shell body is provided with through-hole, pole includes column and connecting plate, column is located in the upper surface of connecting plate, column is arranged in through-hole, and the cover plate of shell body is insulated with column cooperation, the side wall of connecting plate is provided with extension slot, extension is located in the inner side wall of shell body, extension extends to extension slot, and insulating layer is arranged between extension and connecting plate and between shell body and connecting plate. Relative to prior art, the distance of extension and connecting plate is increased by insulating layer composite, so as to increase the thermal composite distance of cover plate and pole, and then improve the sealing effect of the electric core shell.

Description

Technical Field

[0001] This utility model belongs to the field of button cell technology, and particularly relates to a cell casing 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 are opposite polarities. Due to size limitations, the existing cell casings often have poor sealing due to the short thermal bonding distance between the cover plate and the terminals. During the use of the cell, the hot melt adhesive can slowly oxidize and peel off from the edges inwards, causing leakage and affecting the normal use of the cell. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a battery cell housing and a button cell, addressing the issue of the short thermal bonding distance between the existing cover plate and the electrode post.

[0004] To address the aforementioned problems, this utility model provides a battery cell casing, comprising a terminal post, a casing body, an extension portion, and an insulating layer. The casing body has a cover plate with a through hole. The terminal post includes a column and a connecting plate. The column is disposed on the upper surface of the connecting plate and passes through the through hole. The cover plate of the casing body is insulated from the column. The side wall of the connecting plate has an extension groove. The extension portion is disposed on the inner side wall of the casing body and extends into the extension groove. The insulating layer is provided between the extension portion and the connecting plate, and between the casing body and the connecting plate.

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

[0006] Optionally, the cover plate of the shell body is clearance-fitted with the column.

[0007] Optionally, the thickness of the cover plate of the shell body is 0.1 mm to 0.15 mm.

[0008] Optionally, the thickness of the extension is 0.03 mm to 0.08 mm.

[0009] Optionally, the distance between the cover plate of the shell body and the extension is 0.2 mm to 0.4 mm.

[0010] Optionally, the width of the extension groove is 0.13 mm to 0.3 mm.

[0011] Optionally, the thickness of the connecting plate located above the extension groove is 0.1 mm to 0.15 mm.

[0012] Optionally, the thickness of the connecting plate located at the lower part of the extension groove is 0.05 mm to 0.1 mm.

[0013] Optionally, the distance between the outer sidewall of the connecting plate and the inner sidewall of the shell body is 1 mm to 2 mm.

[0014] On the other hand, this utility model embodiment provides a button cell, including a core and a cell housing as described above. The core is installed inside the housing body, one pole of the core is electrically connected to the connecting plate, and the other pole of the core is electrically connected to the housing body.

[0015] The present invention provides a battery cell housing and a button cell, which, compared with the prior art, have at least the following advantages: The battery cell housing has an extension groove on the side wall of the connecting plate, with the extension portion located on the inner side wall of the housing body, extending into the extension groove. Furthermore, an insulating layer is provided between the extension portion and the connecting plate, as well as between the housing body and the connecting plate. Compared with existing technical solutions (where the upper surface of the connecting plate and the lower surface of the cover plate are combined, and the composite channel is straight), this increases the distance between the extension portion and the connecting plate through the insulating layer, making the composite channel S-shaped. This increases the thermal bonding distance between the cover plate and the electrode post, thereby improving the sealing effect of the battery cell housing. Attached Figure Description

[0016] 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.

[0017] Figure 1 This is a schematic diagram of the structure of a button cell provided in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the structure of the battery cell casing provided in one embodiment of the present invention.

[0019] The reference numerals in the accompanying drawings are as follows:

[0020] 100. Battery cell casing; 110. Terminal post; 111. Post; 112. Connecting plate; 113. Extension groove; 120. Shell body; 121. Cover plate; 122. Through hole; 130. Extension; 140. Insulation layer; 200. Core. Detailed Implementation

[0021] 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.

[0022] 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.

[0023] 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.

[0024] like Figures 1 to 2 As shown, an embodiment of the present invention provides a battery cell housing 100, which includes a terminal post 110, a housing body 120, an extension portion 130, and an insulating layer 140. The cover plate 121 of the housing body 120 has a through hole 122. The terminal post 110 includes a column 111 and a connecting plate 112. The column 111 is disposed on the upper surface of the connecting plate 112 and passes through the through hole 122. The cover plate 121 of the housing body 120 is insulated from the column 111. The side wall of the connecting plate 112 has an extension groove 113. The extension portion 130 is disposed on the inner side wall of the housing body 120 and extends to the extension groove 113. An insulating layer 140 is provided between the extension portion 130 and the connecting plate 112, and between the housing body 120 and the connecting plate 112.

[0025] The battery cell housing 100 has an extension groove 113 on the side wall of the connecting plate 112, and an extension 130 is located on the inner side wall of the housing body 120. The extension 130 extends into the extension groove 113, and an insulating layer 140 is provided between the extension 130 and the connecting plate 112, as well as between the housing body 120 and the connecting plate 112. Compared with the existing technical solution (the upper surface of the connecting plate and the lower surface of the cover plate are combined, and the composite channel is straight), the distance between the extension 130 and the connecting plate 112 through the insulating layer is increased, so that the composite channel is S-shaped. This increases the thermal bonding distance between the cover plate 121 and the electrode post 110, thereby improving the sealing effect of the battery cell housing 100.

[0026] When it is necessary to manufacture the battery cell casing 100, the casing body 120 of the battery cell casing 100 is split into two casing body 120 segments. The two casing body 120 segments are made using a mold. Then, the core 200 is installed inside the casing body 120. One pole of the core 200 is electrically connected to the connecting plate 112, and the other pole of the core 200 is electrically connected to the casing body 120. Finally, hot melt adhesive is applied to the extension groove 113 and the upper surface of the connecting plate 112. The two casing body 120 segments are assembled onto the pole post 110 so that the extension 130 extends into the extension groove 113. The two casing body 120 segments are then welded together. The production of the battery cell is completed when the hot melt adhesive cools and solidifies.

[0027] In this embodiment, the shell body 120 and the extension 130 are both made of stainless steel sheets, and the column 111 and the connecting plate 112 are both made of aluminum sheets.

[0028] In one specific embodiment, such as Figures 1 to 2 As shown, the inner sidewall of the shell body 120 is provided with an extension 130. Correspondingly, the sidewall of the connecting plate 112 is provided with an extension groove 113, and the extension 130 extends into the extension groove 113. Of course, it can be understood that the inner sidewall of the shell body 120 may also be provided with other numbers of extensions 130, and correspondingly, the sidewall of the connecting plate 112 is provided with other numbers of extension grooves 113. The other numbers of extensions 130 correspond to and cooperate with the other numbers of extension grooves 113.

[0029] One embodiment of this utility model provides a battery cell housing 100, wherein the cover plate 121 of the housing body 120 and the post 111 are fitted with a clearance. Since the cover plate 121 and the post 111 of the housing body 120 are respectively located at the two poles of the battery cell, the clearance can insulate the cover plate 121 and the post 111 of the housing body 120. Of course, it can be understood that the cover plate 121 and the post 111 of the housing body 120 can also be connected by an insulating material.

[0030] In one specific embodiment, such as Figure 2As shown, the thickness A of the cover plate 121 of the housing body 120 is 0.1 mm to 0.15 mm. The thickness a of the extension 130 is 0.03 mm to 0.08 mm. The distance e between the cover plate 121 and the extension 130 of the housing body 120 is 0.2 mm to 0.4 mm. The width E of the extension groove 113 is 0.13 mm to 0.3 mm. The thickness B of the connecting plate 112 located at the upper part of the extension groove 113 is 0.1 mm to 0.15 mm to ensure the structural strength of the connecting plate 112. The thickness b of the connecting plate 112 located at the lower part of the extension groove 113 is 0.05 mm to 0.1 mm, mainly to increase the composite path, and the thickness is kept as small as possible to ensure a small increase in thickness and reduce the energy loss of the battery cell. The distance C between the outer sidewall of the connecting plate 112 and the inner sidewall of the shell body 120 is 1mm to 2mm, and the distance c between the edge of the extension 130 and the bottom of the extension groove 113 is 0.13mm to 0.3mm, ensuring sufficient safety distance between them to prevent contact from causing a short circuit in the battery cell. The distances d1, d2, and d3 between the cover plate 121 and the connecting plate 112, and between the connecting plate 112 and the extension 130, are all ≥0.05mm to ensure the insulation thickness of the insulation layer 140.

[0031] In addition, such as Figure 1 As shown, another embodiment of this utility model provides a button cell, which includes a core 200 and a cell housing 100 as provided in any of the above embodiments. The core 200 is installed inside the housing body 120, one pole of the core 200 is electrically connected to the connecting plate 112, and the other pole of the core 200 is electrically connected to the housing body 120. The specific structure of the cell housing 100 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.

[0032] When it is necessary to manufacture this button cell, the shell body 120 of the cell shell 100 can be split into two shell body 120 segments. The two shell body 120 segments are made using a mold. Then, the core 200 is installed inside the shell body 120. One pole of the core 200 is electrically connected to the connecting plate 112, and the other pole of the core 200 is electrically connected to the shell body 120. Finally, hot melt adhesive is applied to the extension groove 113 and the upper surface of the connecting plate 112. The two shell body 120 segments are assembled onto the pole post 110 so that the extension 130 extends into the extension groove 113. The two shell body 120 segments are then welded together. The hot melt adhesive cools and solidifies to complete the production of the cell.

[0033] 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 casing, characterized in that, The device includes an electrode post, a housing body, an extension portion, and an insulating layer. The cover plate of the housing body has a through hole. The electrode post includes a column and a connecting plate. The column is disposed on the upper surface of the connecting plate and passes through the through hole. The cover plate of the housing body is insulated from the column. The side wall of the connecting plate has an extension groove. The extension portion is disposed on the inner side wall of the housing body and extends into the extension groove. The insulating layer is provided between the extension portion and the connecting plate, and between the housing body and the connecting plate.

2. The battery cell casing according to claim 1, characterized in that, The cover plate of the shell body is fitted with the column body with a clearance.

3. The battery cell casing according to claim 1, characterized in that, The thickness of the cover plate of the shell body is 0.1 mm to 0.15 mm.

4. The battery cell casing according to claim 1, characterized in that, The thickness of the extension is 0.03 mm to 0.08 mm.

5. The battery cell casing according to claim 1, characterized in that, The distance between the cover plate of the shell body and the extension is 0.2 mm to 0.4 mm.

6. The battery cell casing according to claim 1, characterized in that, The width of the extension groove is 0.13 mm to 0.3 mm.

7. The battery cell casing according to claim 1, characterized in that, The thickness of the connecting plate located at the upper part of the extension groove is 0.1 mm to 0.15 mm.

8. The battery cell casing according to claim 1, characterized in that, The thickness of the connecting plate located at the lower part of the extension groove is 0.05 mm to 0.1 mm.

9. The battery cell casing according to claim 1, characterized in that, The distance between the outer sidewall of the connecting plate and the inner sidewall of the shell body is 1 mm to 2 mm.

10. A button cell, characterized in that, The device includes a core and a cell housing as described in any one of claims 1 to 9, wherein the core is installed inside the housing body, one pole of the core is electrically connected to the connecting plate, and the other pole of the core is electrically connected to the housing body.

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