Battery cell cover plate structure and buckle type battery cell

Abstract

The utility model discloses a kind of electric core cover plate structure and buckle type electric core, it is related to buckle type electric core technical field.The electric core cover plate structure includes pole, cover plate and insulating layer, cover plate is provided with through-hole, pole includes column body and connecting plate, column body is connected to the upper surface of connecting plate, column body is arranged in through-hole, the lower surface of cover plate and the upper surface of connecting plate, one of which is provided with recess, the other is provided with protrusion, protrusion can extend into recess, and insulating layer is arranged between cover plate and connecting plate and the gap between protrusion and recess.The electric core cover plate structure increases the distance of protrusion and recess through insulating layer compound, so as to increase the thermal compound 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 cover structure 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 cell cover structure 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 cover structure, comprising a terminal post, a cover plate, and an insulating layer. The cover plate has a through hole, and the terminal post includes a column and a connecting plate. The column is connected to the upper surface of the connecting plate and passes through the through hole. The lower surface of the cover plate and the upper surface of the connecting plate each have a groove and a protrusion, respectively. The protrusion can extend into the groove, and the insulating layer is disposed in the gap between the cover plate and the connecting plate, and between the protrusion and the groove.

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

[0006] Optionally, the lower surface of the cover plate is provided with a groove, and the upper surface of the connecting plate is provided with a protrusion that can extend into the groove.

[0007] Optionally, the groove is an annular groove that surrounds the through hole, and the protrusion is an annular protrusion.

[0008] Optionally, the upper surface of the connecting plate is provided with a groove, and the lower surface of the cover plate is provided with a protrusion, the protrusion being able to extend into the groove.

[0009] Optionally, the groove is an annular groove, the protrusion is an annular protrusion, and the annular protrusion surrounds the through hole.

[0010] Optionally, the width of the groove is 0.8 mm to 1.5 mm, and the depth of the groove is 0.2 mm to 0.3 mm.

[0011] Optionally, the width of the protrusion is 0.4 mm to 1 mm, and the height is 0.1 mm to 0.25 mm.

[0012] Optionally, the thickness of the connecting plate is greater than 0.1 mm.

[0013] Optionally, the insulating layer is a hot melt adhesive layer, and the thickness of the hot melt adhesive layer is 0.1 mm to 0.2 mm.

[0014] On the other hand, this utility model embodiment provides a button cell, including a housing, a core, and a cell cover structure as described above. The core is installed inside the housing, the cover is installed at the opening of the housing and is electrically connected to the housing, one pole of the core is electrically connected to the terminal post, and the other pole of the core is electrically connected to the housing.

[0015] The battery cell cover structure and button cell provided in this embodiment of the utility model have at least the following advantages compared with the prior art: In this battery cell cover structure, one of the lower surface of the cover plate and the upper surface of the connecting plate are provided with a groove and the other with a protrusion. The protrusion can extend into the groove, and the insulating layer is provided in the gap between the cover plate and the connecting plate and between the protrusion and the groove. Compared with the existing technical solutions, the distance between the protrusion and the groove through the insulating layer is increased, thereby increasing the thermal bonding distance between the cover plate and the electrode post, and thus improving the sealing effect of the battery cell shell. 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 battery cell cover structure provided in one embodiment of the present invention;

[0018] Figure 2 This is a schematic diagram of the cover plate structure of the battery cell cover plate provided in one embodiment of the present utility model;

[0019] Figure 3 This is a schematic diagram of the electrode post structure of the battery cell cover plate structure provided in one embodiment of the present invention;

[0020] Figure 4 This is a schematic diagram of the structure of a button cell provided in one embodiment of the present invention.

[0021] The reference numerals in the accompanying drawings are as follows:

[0022] 100. Cell cover structure; 110. Terminal post; 111. Post; 112. Connecting plate; 113. Protrusion; 120. Cover plate; 121. Through hole; 122. Groove; 130. Insulation layer; 200. Shell; 300. Core. Detailed Implementation

[0023] 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.

[0024] 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.

[0025] 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.

[0026] like Figures 1 to 3 As shown, an embodiment of the present invention provides a battery cell cover structure 100, which includes a terminal post 110, a cover plate 120, and an insulating layer 130. The cover plate 120 has a through hole 121. The terminal post 110 includes a column 111 and a connecting plate 112. The column 111 is connected to the upper surface of the connecting plate 112 and passes through the through hole 121. The lower surface of the cover plate 120 and the upper surface of the connecting plate 112 have a groove 122 and a protrusion 113. The protrusion 113 can extend into the groove 122. The insulating layer 130 is disposed in the gap between the cover plate 120 and the connecting plate 112 and between the protrusion 113 and the groove 122.

[0027] The cell cover structure 100 has a groove 122 on the lower surface of the cover plate 120 and a protrusion 113 on the upper surface of the connecting plate 112. The protrusion 113 can extend into the groove 122. An insulating layer 130 is disposed between the cover plate 120 and the connecting plate 112 and between the protrusion 113 and the groove 122. Compared with the existing technical solution, this increases the distance between the protrusion 113 and the groove 122 through the insulating layer 130, thereby increasing the thermal bonding distance between the cover plate 120 and the electrode post 110, and thus improving the sealing effect of the cell casing.

[0028] When it is necessary to manufacture the cell cover structure 100, hot melt adhesive is first applied to the groove 122, the lower surface of the cover 120, and the upper surface of the connecting plate 112. Then, the cover 120 and the terminal post 110 are assembled. The post 111 of the terminal post 110 passes through the through hole 121 of the cover 120, and the protrusion 113 extends into the groove 122. The production of the cell cover structure 100 is completed after the hot melt adhesive cools and solidifies.

[0029] In this embodiment, the cover plate 120 is made of stainless steel sheet, and the column 111 and the connecting plate 112 are both made of aluminum sheet.

[0030] In one specific embodiment, such as Figures 1 to 3 As shown, the lower surface of the cover plate 120 is provided with a groove 122, and the upper surface of the connecting plate 112 is provided with a protrusion 113, which can extend into the groove 122. The groove 122 is an annular groove that surrounds the through hole 121, and the protrusion 113 is an annular protrusion 113.

[0031] When it is necessary to manufacture the cell cover structure 100, hot melt adhesive is first applied to the groove 122 and the lower surface of the cover 120. Then, the cover 120 and the terminal post 110 are assembled. The post 111 of the terminal post 110 passes through the through hole 121 of the cover 120, and the protrusion 113 extends into the groove 122. The production of the cell cover structure 100 is completed after the hot melt adhesive cools and solidifies.

[0032] In another specific embodiment, the upper surface of the connecting plate 112 is provided with a groove 122, and the lower surface of the cover plate 120 is provided with a protrusion 113, which can extend into the groove 122. The groove 122 is an annular groove, and the protrusion 113 is an annular protrusion 113, which surrounds the through hole 121.

[0033] When it is necessary to manufacture the cell cover structure 100, hot melt adhesive is first applied to the groove 122 and the upper surface of the connecting plate 112. Then, the cover 120 and the terminal post 110 are assembled. The post 111 of the terminal post 110 passes through the through hole 121 of the cover 120, and the protrusion 113 extends into the groove 122. The production of the cell cover structure 100 is completed after the hot melt adhesive cools and solidifies.

[0034] In this embodiment, the width 'a' of the groove 122 is 0.8mm to 1.5mm, and the depth 'f' of the groove 122 is 0.2mm to 0.3mm, which is greater than the height 'd' of the protrusion 113. This ensures that the protrusion 113 is not completely embedded in the groove 122 during the composite process, preventing the protrusion 113 from contacting the groove 122 and causing a short circuit. The width 'b' of the protrusion 113 is 0.4mm to 1mm, and the height 'd' is 0.1mm to 0.25mm. The thickness of the connecting plate 112 is greater than 0.1mm. The insulating layer 130 is a hot melt adhesive layer with a thickness of 0.1mm to 0.2mm.

[0035] In addition, such as Figure 4 As shown, another embodiment of this utility model provides a button cell, which includes a housing 200, a core 300, and a cell cover structure 100 as provided in any of the above embodiments. The core 300 is installed inside the housing 200, and the cover 120 is installed at the opening of the housing 200 and electrically connected to the housing 200. One pole of the core 300 is electrically connected to the terminal post 110, and the other pole of the core 300 is electrically connected to the housing 200. The specific structure of the cell cover structure 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.

[0036] 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 cover structure, characterized in that, The device includes an electrode post, a cover plate, and an insulating layer. The cover plate has a through hole. The electrode post includes a column and a connecting plate. The column is connected to the upper surface of the connecting plate and passes through the through hole. The lower surface of the cover plate and the upper surface of the connecting plate have a groove and a protrusion, respectively. The protrusion can extend into the groove. The insulating layer is disposed in the gap between the cover plate and the connecting plate and between the protrusion and the groove.

2. The cell cover structure according to claim 1, characterized in that, The lower surface of the cover plate has a groove, and the upper surface of the connecting plate has a protrusion that can extend into the groove.

3. The cell cover structure according to claim 2, characterized in that, The groove is an annular groove that surrounds the through hole, and the protrusion is an annular protrusion.

4. The cell cover structure according to claim 1, characterized in that, The upper surface of the connecting plate has a groove, and the lower surface of the cover plate has a protrusion that can extend into the groove.

5. The cell cover structure according to claim 4, characterized in that, The groove is an annular groove, the protrusion is an annular protrusion, and the annular protrusion surrounds the through hole.

6. The cell cover structure according to claim 1, characterized in that, The groove has a width of 0.8 mm to 1.5 mm and a depth of 0.2 mm to 0.3 mm.

7. The cell cover structure according to claim 1, characterized in that, The protrusion has a width of 0.4 mm to 1 mm and a height of 0.1 mm to 0.25 mm.

8. The cell cover structure according to claim 1, characterized in that, The thickness of the connecting plate is greater than 0.1 mm.

9. The cell cover structure according to claim 1, characterized in that, The insulating layer is a hot melt adhesive layer, and the thickness of the hot melt adhesive layer is 0.1 mm to 0.2 mm.

10. A button cell, characterized in that, The device includes a housing, a core, and a cell cover structure as described in any one of claims 1 to 9. The core is installed inside the housing, the cover is installed at the opening of the housing and is electrically connected to the housing, one pole of the core is electrically connected to the terminal post, and the other pole of the core is electrically connected to the housing.

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