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 insulator, cover plate is provided with through-hole, pole includes cylinder, cylinder is worn in through-hole, and cover plate and pole insulating cooperation, the upper surface of cover plate is provided with mounting groove around through-hole, mounting groove is through the hole wall of through-hole, insulator is located in mounting groove.When external connection charge-discharge element or equipment, since the upper surface of cover plate is provided with mounting groove around through-hole, mounting groove is through the hole wall of through-hole, insulator is located in mounting groove, insulator can extend the insulation distance between pole and the upper surface of cover plate, to reduce the probability that pole and cover plate are communicated by conductive element and metal impurity between them and lead to external short circuit, to further reduce the probability that electric core damage even safety accident is generated thereby.

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 have opposite polarities. The distance between the terminal body and the cover plate is too close. Some manufacturers of steel-cased button cells did not consider this issue when designing the cover plate structure. As a result, when external charging and discharging components or equipment are connected, the terminal body and the cover plate can easily become connected by conductive components and metal impurities, leading to an external short circuit, causing cell damage or even safety accidents. 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 that the distance between the column body and the cover plate of the existing electrode is too close.

[0004] To address the aforementioned issues, this utility model provides a battery cell cover structure, comprising a terminal post, a cover plate, and an insulator. The cover plate has a through hole, the terminal post includes a column body that passes through the through hole, and the cover plate is insulated from the terminal post. The upper surface of the cover plate has an installation groove surrounding the through hole, the installation groove penetrating the hole wall of the through hole, and the insulator is disposed in the installation groove.

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

[0006] Optionally, the insulator protrudes from the wall of the through hole in a direction close to the column.

[0007] Optionally, the distance between the wall of the through hole and the column is 0.3 mm to 1 mm.

[0008] Optionally, the distance b between the insulator protruding towards the column and the wall of the through hole is ≥0.2mm.

[0009] Optionally, the thickness of the insulator is 0.05 mm to 0.1 mm.

[0010] Optionally, the upper surface of the insulator is flush with the upper surface of the cover plate.

[0011] Optionally, the sidewall of the through hole is clearance-fitted with the column, and the insulator is disposed in the mounting groove and the gap between the cover plate and the column.

[0012] Optionally, the depth of the mounting groove is 0.05 mm to 0.1 mm, and the width of the mounting groove is 0.5 mm to 1 mm.

[0013] Optionally, the pole post further includes a connecting plate, and the pole body is disposed on the upper surface of the connecting plate;

[0014] The cell cover structure also includes an adhesive layer, and the lower surface of the cover is insulated from the upper surface of the connecting plate through the adhesive layer;

[0015] The upper surface of the column is higher than the upper surface of the cover plate.

[0016] 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.

[0017] The battery cell cover structure and button cell provided in this embodiment of the utility model have at least the following beneficial effects compared with the prior art: When external charging and discharging elements or devices are connected, the upper surface of the cover plate is provided with a mounting groove around the through hole. The mounting groove penetrates the hole wall of the through hole, and the insulator is provided in the mounting groove. The insulator can extend the insulation distance between the column and the cover plate, thereby reducing the probability of external short circuit caused by the connection between the column and the cover plate by conductive elements and metal impurities, and thus reducing the probability of battery cell damage or even safety accidents. Attached Figure Description

[0018] 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.

[0019] Figure 1 This is a schematic diagram of the structure of a button cell provided in one embodiment of the present invention;

[0020] Figure 2 for Figure 1 A magnified view of region A in the middle.

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

[0022] 100. Button cell; 110. Housing; 120. Core; 130. Terminal post; 131. Post; 132. Connecting plate; 140. Cover plate; 141. Through hole; 142. Mounting groove; 150. Insulator; 160. Adhesive layer. 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 2 As shown, an embodiment of the present invention provides a battery cell cover structure, which includes a terminal post 130, a cover plate 140, and an insulator 150. The cover plate 140 has a through hole 141. The terminal post 130 includes a column 131, which passes through the through hole 141. The cover plate 140 and the terminal post 130 are insulated from each other. The upper surface of the cover plate 140 has a mounting groove 142 around the through hole 141. The mounting groove 142 penetrates the hole wall of the through hole 141. The insulator 150 is disposed in the mounting groove 142.

[0027] When external charging or discharging components or devices are connected, the upper surface of the cover plate 140 is provided with a mounting groove 142 around the through hole 141. The mounting groove 142 penetrates the hole wall of the through hole 141. The insulator 150 is provided in the mounting groove 142. The insulator 150 can extend the insulation distance between the column 131 and the upper surface of the cover plate 140, thereby reducing the probability of external short circuit caused by conductive components and metal impurities connecting the column 131 and the cover plate 140, and thus reducing the probability of cell damage or even safety accidents.

[0028] The upper surface of the insulator 150 is flush with the upper surface of the cover plate 140, which facilitates the connection of the cover plate 140 to charging and discharging elements or equipment.

[0029] When it is necessary to connect charging and discharging elements or devices, one pole of the charging and discharging element or device is connected to the post 131, and the other pole is connected to the cover plate 140. In this embodiment, the post 130 is the positive pole of the battery cell, the cover plate 140 is the negative pole of the battery cell, the post 130 is made of aluminum, the cover plate 140 is made of stainless steel sheet, and the insulator 150 is made of insulating glue.

[0030] In another embodiment, the terminal 130 is the negative electrode of the battery cell, and the cover plate 140 is the positive electrode of the battery cell.

[0031] like Figure 2 As shown, in a specific embodiment, the depth e of the mounting groove 142 is 0.05 mm to 0.1 mm, which ensures that the composite insulator 150 has sufficient thickness, and does not reduce the strength of the cover plate 140 due to excessive depth.

[0032] like Figure 2 As shown, in a specific embodiment, the width c of the mounting groove 142 is 0.5mm to 1mm, which ensures that there is sufficient width for the composite insulator 150, and does not reduce the strength of the cover plate 140 due to excessive width.

[0033] One embodiment of this utility model provides a cell cover structure, such as... Figures 1 to 2 As shown, the insulator 150 protrudes from the wall of the through hole 141 towards the pillar 131. Since the distance between the insulator 150 and the pillar 131 is smaller than the distance between the cover plate 140 and the pillar 131, the metal impurities that can enter the space between the cover plate 140 and the pillar 131 from between the insulator 150 and the pillar 131 are small in size and cannot cause a short circuit between the cover plate 140 and the pillar 131.

[0034] In one specific embodiment, the distance d between the wall of the through hole 141 and the pillar 131 is 0.3 mm to 1 mm. The insulator 150 protrudes from the wall of the through hole 141 by a distance b ≥ 0.2 mm in the direction closer to the pillar 131, and the edge of the protective cover 140 is not exposed.

[0035] In this embodiment, as Figures 1 to 2 As shown, the upper surface of the post 131 is higher than the upper surface of the cover plate 140. Since the polarity of the post 130 is opposite to that of the cover plate 140, a height difference is formed between the upper surface of the post 131 and the upper surface of the cover plate 140, which facilitates the connection of the post 131 and the cover plate 140 to charging and discharging elements or devices.

[0036] In one specific embodiment, the thickness of the insulator 150 is 0.05 mm to 0.1 mm. This thickness can ensure the insulation distance between the column 131 and the upper surface of the cover plate 140, thereby reducing the probability of external short circuit caused by the connection between the column 131 and the cover plate 140 by conductive elements and metal impurities, thereby reducing the probability of cell damage or even safety accidents, and avoiding cell ED loss due to excessive thickness.

[0037] One embodiment of this utility model provides a battery cell cover structure. The sidewall of the through hole 141 is clearance-fitted with the column 131. An insulator 150 is disposed in the mounting groove 142 and the gap between the cover plate 140 and the column 131. The mounting groove 142 and the gap between the cover plate 140 and the column 131 are filled with the insulator 150, which can insulate the cover plate 140 and the column 131, thereby preventing metal impurities from entering the gap between the cover plate 140 and the column 131 and preventing metal impurities from causing a short circuit between the cover plate 140 and the column 131.

[0038] Of course, it is understandable that the sidewall of the through hole 141 and the column 131 can also be insulated from each other in other ways.

[0039] One embodiment of this utility model provides a cell cover structure, such as... Figures 1 to 2 As shown, the terminal post 130 also includes a connecting plate 132, with the post body 131 disposed on the upper surface of the connecting plate 132, and the lower surface of the cover plate 140 being insulatedly connected to the upper surface of the connecting plate 132. The cell cover plate structure also includes an adhesive layer 160, with the lower surface of the cover plate 140 being insulatedly connected to the upper surface of the connecting plate 132 through the adhesive layer 160.

[0040] The adhesive layer 160 enables the cover plate 140 and the connecting plate 132 to be insulated and fixedly connected, so that the pole post 130 and the connecting plate 132 are connected as a whole. In this embodiment, the adhesive layer 160 is made of polypropylene.

[0041] When manufacturing the cell cover structure, firstly, the lower surface of the cover 140 is connected to the upper surface of the connecting plate 132 using the adhesive layer 160. Then, the insulator 150 is placed in the mounting groove 142, and then the upper surface of the insulator 150 is smoothed. Excess insulator 150 can be filled into the gap between the pole post 130 and the cover 140 to further enhance the cell safety performance.

[0042] In addition, such as Figures 1 to 2As shown, another embodiment of this utility model provides a button cell 100, which includes a housing 110, a core 120, and a cell cover structure as provided in any of the above embodiments. The core 120 is installed inside the housing 110, and the cover 140 is installed at the opening of the housing 110 and electrically connected to the housing 110. One pole of the core 120 is electrically connected to the terminal post 130, and the other pole of the core 120 is electrically connected to the housing 110. The specific structure of the cell cover structure is the same as described in the above embodiments. Since this button cell 100 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.

[0043] In this embodiment, the positive electrode of the core 120 is electrically connected to the terminal 130, and the terminal 130 serves as the positive electrode of the button cell 100; the negative electrode of the core 120 is electrically connected to the housing 110, and the cover plate 140 serves as the negative electrode of the button cell 100.

[0044] 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 a pole, a cover plate, and an insulator. The cover plate has a through hole. The pole includes a column that passes through the through hole. The cover plate is insulated from the pole. The upper surface of the cover plate has a mounting groove around the through hole. The mounting groove penetrates the wall of the through hole. The insulator is disposed in the mounting groove.

2. The cell cover structure according to claim 1, characterized in that, The insulator protrudes from the wall of the through hole toward the direction of the column.

3. The cell cover structure according to claim 1, characterized in that, The distance between the wall of the through hole and the column is 0.3 mm to 1 mm.

4. The cell cover structure according to claim 3, characterized in that, The distance b between the insulator protruding towards the column and the wall of the through hole is ≥ 0.2 mm.

5. The cell cover structure according to any one of claims 1-4, characterized in that, The thickness of the insulator is 0.05 mm to 0.1 mm.

6. The cell cover structure according to claim 1, characterized in that, The upper surface of the insulator is flush with the upper surface of the cover plate.

7. The cell cover structure according to claim 1, characterized in that, The sidewall of the through hole is fitted with the column body with a clearance, and the insulator is disposed in the mounting groove and the gap between the cover plate and the column body.

8. The cell cover structure according to claim 1, characterized in that, The depth of the mounting groove is 0.05mm to 0.1mm, and the width of the mounting groove is 0.5mm to 1mm.

9. The cell cover structure according to claim 1, characterized in that, The pole also includes a connecting plate, and the pole body is disposed on the upper surface of the connecting plate; The cell cover structure also includes an adhesive layer, and the lower surface of the cover is insulated from the upper surface of the connecting plate through the adhesive layer; The upper surface of the column is higher than the upper surface of the cover plate.

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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