Connecting piece, battery and electric equipment

Abstract

The utility model provides a connecting piece, a battery and electric equipment, and relates to the technical field of batteries. The connecting sheet comprises a pole connecting part, a deformation part and a tab connecting part; one side, along the first direction, of the deformation part is connected with the pole connecting part, and one side, far away from the pole connecting part, of the deformation part along the first direction is connected with the tab connecting part; the width of the tab connecting part in the second direction is larger than that of the pole connecting part in the second direction, and the width of the deformation part in the second direction is smaller than that of the pole connecting part in the second direction; and the thickness of the deformation part along the third direction is smaller than the thickness of the pole connecting part along the third direction and the thickness of the tab connecting part along the third direction. The deformation part of the connecting piece can deform, so that the pole connecting part can be folded towards the tab connecting part, the pole connecting part can be conveniently connected with the pole, the tab connecting part can be conveniently connected with the tab on the battery cell, and when the battery cell is short-circuited, the deformation part can be fused to break the connection between the pole and the battery cell.

Description

Technical Field

[0001] The present application relates to the technical field of batteries, and particularly to a connecting piece, a battery and an electrical device. Background Art

[0002] In the field of batteries, a connecting piece is usually used to connect a pole column and a tab on a battery cell. When the charging and discharging current of the battery cell is too large, the connecting piece needs to automatically fuse to cut off the electrical connection between the battery cell and the pole column. Currently, in the prior art, through holes are usually formed in the connecting piece, and the connecting piece can be fused at the position where the through holes are formed. However, the structure of the existing connecting piece causes the strength of the connecting piece at the position where the through holes are formed to be weak, resulting in the connecting piece breaking due to an accident. Utility Model Content

[0003] To overcome the deficiencies in the prior art, the present application provides a connecting piece, a battery and an electrical device.

[0004] The present application provides the following technical solutions:

[0005] In a first aspect, the present application provides a connecting piece having a first direction, a second direction and a third direction, the first direction being perpendicular to the second direction, and the third direction being perpendicular to the first direction and the second direction. The connecting piece includes a pole column connection portion, a deformation portion and a tab connection portion; one side of the deformation portion along the first direction is connected to the pole column connection portion, and the other side of the deformation portion along the first direction away from the pole column connection portion is connected to the tab connection portion; the width of the tab connection portion along the second direction is greater than the width of the pole column connection portion along the second direction, and the width of the deformation portion along the second direction is less than the width of the pole column connection portion along the second direction; the thickness of the deformation portion along the third direction is less than the thickness of the pole column connection portion along the third direction and the thickness of the tab connection portion along the third direction.

[0006] In a possible implementation manner, the thickness of the pole column connection portion along the third direction is the same as the thickness of the tab connection portion along the third direction.

[0007] In a possible implementation manner, the thickness of the deformation portion along the third direction is 0.7 - 1 mm less than the thickness of the pole column connection portion along the third direction.

[0008] In a possible implementation manner, the width of the deformation portion along the second direction is 5 - 10 mm less than the width of the pole column connection portion along the second direction.

[0009] In a possible implementation manner, at least one positioning groove is formed in the pole column connection portion.

[0010] In a possible implementation manner, at least one of the positioning grooves is provided on both sides of the pole connection part along the second direction.

[0011] In a possible implementation manner, one of the positioning grooves is provided on both sides of the pole connection part along the second direction, and the two positioning grooves are symmetrically arranged.

[0012] In a possible implementation manner, at least one weight-reducing groove is provided on the pole connection part.

[0013] In a second aspect, the present application further provides a battery, which includes a pole, an electric core, and the above-mentioned connecting piece. The pole is connected to the pole connection part, and the tab on the electric core is connected to the tab connection part.

[0014] In a third aspect, the present application further provides an electrical device, which includes the above-mentioned battery.

[0015] Compared with the prior art, the beneficial effects of the present application are as follows:

[0016] For the connecting piece provided by the present application, by providing a deformation part between the pole connection part and the tab connection part, the deformation part can deform, so that the pole connection part can be folded towards the tab connection part, thereby facilitating the connection of the pole connection part to the pole and the tab connection part to the tab on the electric core. Since the cross-sectional area of the deformation part is smaller than the cross-sectional area of the tab connection part and the cross-sectional area of the pole connection part, when the current of the electric core increases sharply, the connecting piece can be melted and broken at the deformation part, thereby disconnecting the electrical connection between the electric core and the pole.

[0017] To make the above objects, features, and advantages of the present application more obvious and understandable, the following specific preferred embodiments are given, and detailed descriptions are made in conjunction with the accompanying drawings as follows. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions of the embodiments of the present application, the following will briefly introduce the drawings required in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0019] Figure 1 Shows a three-dimensional structural schematic diagram of a connecting piece according to an embodiment of the present application;

[0020] Figure 2 Shows a three-dimensional structural schematic diagram of the connecting piece from another angle according to an embodiment of the present application;

[0021] Figure 3Shows a schematic diagram of the folded connecting piece according to an embodiment of the present application;

[0022] Figure 4 Shows a schematic diagram of the connection between the connecting piece and the battery cell according to an embodiment of the present application.

[0023] Main element symbol description:

[0024] 100 - Connecting piece; 110 - Terminal connection part; 111 - First connection area; 112 - Positioning groove; 113 - Weight reduction groove; 120 - Deformation part; 130 - Tab connection part; 131 - Second connection area;

[0025] 200 - Battery cell; 210 - Tab;

[0026] X - First direction; Y - Second direction; Z - Third direction. Detailed implementation manners

[0027] The embodiments of the present application will be described in detail below. The examples of the embodiments are shown in the drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the drawings are exemplary and are only used to explain the present application and should not be construed as a limitation to the present application.

[0028] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application 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 thus should not be construed as a limitation to the present application.

[0029] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present application, "a plurality" means two or more unless otherwise specifically defined.

[0030] In this application, unless otherwise clearly defined and limited, terms such as "installation", "connection", "linkage", "fixation" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the communication inside two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0031] In this application, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature is at a higher horizontal level than the second feature. The first feature being "under", "beneath" and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature is at a lower horizontal level than the second feature.

[0032] Embodiment 1

[0033] Please refer to Figure 1 , an embodiment of the present application provides a connecting piece 100. The connecting piece 100 is used to connect a pole column (not shown in the figure) and a tab 210 on a battery cell 200, and when the current during charging and discharging of the battery cell 200 is too large, the connecting piece 100 can melt to disconnect the connection between the battery cell 200 and the pole column.

[0034] Please refer to Figure 1 and Figure 2 , define the length direction of the connecting piece 100 as the first direction X, the width direction of the connecting piece 100 as the second direction Y, and the height direction of the connecting piece 100 as the third direction Z.

[0035] Wherein, the first direction X is perpendicular to the second direction Y, and the third direction Z is perpendicular to the first direction X and the second direction Y. It can be understood that the above definitions are only for facilitating the understanding of the relative position relationship of each part in the connecting piece 100, and should not be construed as a limitation to the present application.

[0036] Please refer to Figure 1 and Figure 2 , the connecting piece 100 includes a pole column connecting portion 110, a deformation portion 120 and a tab connecting portion 130.

[0037] Wherein, one side of the deformation part 120 along the first direction X is connected to the pole connection part 110, and the other side of the deformation part 120 away from the pole connection part 110 along the first direction X is connected to the tab connection part 130; the pole connection part 110 is used to connect the pole, and the tab connection part 130 is used to connect the tab 210 on the battery cell 200, so that the battery cell 200 can be electrically connected to the pole through the connection piece 100.

[0038] Please refer to Figure 3 , the deformation part 120 can deform, so that the pole connection part 110 can be folded towards the tab connection part 130, facilitating the pole to be disposed above the battery cell 200.

[0039] The width of the tab connection part 130 along the second direction Y is greater than the width of the pole connection part 110 along the second direction Y, and the width of the deformation part 120 along the second direction Y is less than the width of the pole connection part 110 along the second direction Y; the thickness of the deformation part 120 along the third direction Z is less than the thickness of the pole connection part 110 along the third direction Z and the thickness of the tab connection part 130 along the third direction Z.

[0040] Since the cross-sectional area of the deformation part 120 is smaller than the cross-sectional area of the tab connection part 130 and the cross-sectional area of the pole connection part 110, when the current of the battery cell 200 increases sharply, the connection piece 100 can be melted and broken at the deformation part 120, thereby disconnecting the electrical connection between the battery cell 200 and the pole.

[0041] The cross-sectional areas of the deformation part 120, the pole connection part 110, and the tab connection part 130 are all the cross-sectional areas in the plane of the second direction Y and the third direction Z.

[0042] The cross-sectional area of the deformation part 120 is the overcurrent area of the current.

[0043] In some embodiments, the connection piece 100 is processed from a whole plate-like structure by a cutting process.

[0044] In some embodiments, the thickness of the pole connection part 110 along the third direction Z and the thickness of the tab connection part 130 along the third direction Z are both between 1 - 2 mm.

[0045] The thickness of the pole connection part 110 along the third direction Z is the same as the thickness of the tab connection part 130 along the third direction Z.

[0046] In some embodiments, the thickness of the deformation part 120 along the third direction Z is between 0.3 and 1 mm.

[0047] In some embodiments, the thickness of the deformation part 120 along the third direction Z is 0.7 - 1 mm less than the thickness of the pole connection part 110 along the third direction Z.

[0048] In some embodiments, the width of the deformation part 120 along the second direction Y is between 5 and 10 mm.

[0049] In some embodiments, the width of the pole connection part 110 along the second direction Y and the width of the tab connection part 130 along the second direction Y are both between 10 and 20 mm.

[0050] In some embodiments, the width of the deformation part 120 along the second direction Y is 5 - 10 mm less than the width of the pole connection part 110 along the second direction Y.

[0051] Preferably, when the thickness of the deformation part 120 along the third direction Z is 0.8 mm less than the thickness of the pole connection part 110 along the third direction Z, and the width of the deformation part 120 along the second direction Y is 8 mm less than the width of the pole connection part 110 along the second direction Y, the connecting piece 100 is not easily broken at the deformation part 120 due to accidental collisions, etc., and when the current during charging and discharging of the battery cell 200 increases sharply, the connecting piece 100 can be quickly melted at the deformation part 120.

[0052] In some embodiments, please refer to Figure 2 , a first connection area 111 is provided on the pole connection part 110, and the first connection area 111 is used to connect to the pole; a second connection area 131 is provided on the tab connection part 130, and the second connection area 131 is used to connect to the tab 210.

[0053] When the connecting piece 100 is not folded, both the first connection area 111 and the second connection area 131 are in the plane of the first direction X and the second direction Y.

[0054] In some embodiments, the first connection area 111 is connected to the pole by laser welding, and the second connection area 131 is connected to the tab 210 by laser welding.

[0055] The battery further includes a connected cover plate (not shown in the figure) and an insulating member (not shown in the figure). The poles respectively pass through the cover plate and the insulating member, and the poles are connected to the cover plate. The insulating member is disposed between the cover plate and the connecting piece 100.

[0056] In some embodiments, refer to Figure 1 and Figure 2 , at least one positioning groove 112 is formed in the pole connection part 110, and the positioning groove 112 is used to cooperate with a positioning post (not shown in the figure) on the insulating plate to prevent the connecting piece 100 from shifting relative to the pole when the first connection area 111 is welded to the pole.

[0057] In some embodiments, at least one of the positioning grooves 112 is formed on both sides of the pole connection part 110 along the second direction Y.

[0058] In some embodiments, refer to Figure 1 and Figure 2 , one of the positioning grooves 112 is formed on both sides of the pole connection part 110 along the second direction Y, and the two positioning grooves 112 are symmetrically arranged.

[0059] In some embodiments, at least one weight-reducing groove 113 is formed in the pole connection part 110, and the weight-reducing groove 113 is used to reduce the weight of the connecting piece 100.

[0060] Exemplarily, the shape of the tab connection part 130 is generally rectangular, and the weight-reducing grooves 113 are arranged at the four corners of the tab connection part 130.

[0061] Embodiment Two

[0062] Refer to Figures 1 to 4 , the present application further provides a battery, the battery includes a pole (not shown in the figure), a battery cell 200 and the connecting piece 100 of any of the above embodiments, the pole is connected to the pole connection part 110, and the tab 210 on the battery cell 200 is connected to the tab connection part 130.

[0063] In some embodiments, the pole is connected to the first connection area 111 on the pole connection part 110, and the tab 210 is connected to the second connection area 131 on the tab connection part 130.

[0064] In some embodiments, the battery further includes a cover plate (not shown in the figure) and an insulating member (not shown in the figure), the insulating member is disposed between the cover plate and the connecting piece 100, and the insulating member is connected to the cover plate, the pole respectively passes through the pole and the cover plate, and the pole is fixedly connected to the cover plate.

[0065] A positioning post is provided on a side of the insulating member away from the cover plate, and the positioning post cooperates with the positioning groove 112 formed in the pole connection part 110, so as to prevent the connecting piece 100 from shifting relative to the pole when the pole is connected to the first connection area 111.

[0066] Example 3

[0067] The present application also provides an electrical device, which includes the above battery.

[0068] The electrical device may be, but is not limited to, a mobile phone, a tablet computer, a laptop computer, an electric toy, an electric tool, a battery car, an electric vehicle, a ship, a spacecraft, etc.

[0069] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "example", "specific example", or "some examples", etc. means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, without contradiction, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0070] Although the embodiments of the present application have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present application. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of the present application.

Claims

1. A connecting sheet, characterized in that: It has a first direction, a second direction and a third direction, the first direction is perpendicular to the second direction, and the third direction is perpendicular to the first direction and the second direction, the connecting piece includes a pole connecting portion, a deformation portion and a pole lug connecting portion; the deformation portion is connected to the pole connecting portion on one side along the first direction, and the deformation portion is connected to the pole lug connecting portion on the side away from the pole connecting portion along the first direction; the width of the pole lug connecting portion along the second direction is greater than the width of the pole connecting portion along the second direction, and the width of the deformation portion along the second direction is less than the width of the pole connecting portion along the second direction; the thickness of the deformation portion along the third direction is less than the thickness of the pole connecting portion along the third direction, and the thickness of the pole lug connecting portion along the third direction.

2. The connecting piece according to claim 1, characterized in that: The thickness of the pole connecting portion along the third direction is the same as the thickness of the pole tab connecting portion along the third direction.

3. The connecting piece according to claim 2, characterized in that: The thickness of the deformation portion along the third direction is 0.7-1 mm smaller than the thickness of the pole connecting portion along the third direction.

4. The connecting sheet according to claim 1, characterized in that: The width of the deformation portion along the second direction is 5-10 mm smaller than the width of the pole connecting portion along the second direction.

5. The connecting sheet according to claim 1, characterized in that: At least one positioning groove is provided on the pole connecting portion.

6. The connecting piece according to claim 5, characterized in that: At least one positioning groove is formed on both sides of the pole connecting portion along the second direction.

7. The connecting piece according to claim 6, characterized in that: One positioning groove is provided on both sides of the pole connecting portion along the second direction, and the two positioning grooves are symmetrically arranged.

8. The connecting sheet according to claim 1, characterized in that: At least one weight-reducing groove is provided on the pole connecting portion.

9. A battery, characterized in that: It comprises a pole, a battery cell and the connecting piece according to any one of claims 1 to 8, wherein the pole is connected to the pole connecting portion, and the tab on the battery cell is connected to the tab connecting portion.

10. An electrical device, characterized in that: A battery comprising the battery of claim 9.

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