Pin structure, cover plate assembly and battery

Abstract

The utility model provides a pin structure, a cover plate assembly and a battery, the pin structure comprises a pole connecting part and a tab connecting part, and the pole connecting part is configured to be connected with a pole; the tab connecting part comprises a connecting plate and a connecting part, a notch groove extending in the first direction is formed in the connecting part, one part of the notch groove is arranged on the first sub-connecting part, the other part of the notch groove is arranged on the second sub-connecting part, and the second sub-connecting part is bent relative to the first sub-connecting part at the notch groove; according to the technical scheme, the notch groove is formed in the connecting part, one part of the notch groove is located on the flat-plate-shaped first sub-connecting part, and the other part of the notch groove is located on the arc-shaped second sub-connecting part, so that interference on bending of the mounting part can be avoided; in addition, the position of the notch groove is not positioned on the mounting part, so that the notch groove does not occupy the welding area between the mounting part and the tab.

Description

Technical Field

[0001] The utility model relates to the technical field of batteries, and particularly relates to a pin structure, a cover plate assembly and a battery. Background Art

[0002] In rechargeable batteries, in order to better weld the tab, the sub-pin connecting the core pack tab on the pin is generally bent. The smaller the bending gap of the sub-pin is, the better. In the related art, a groove is generally provided near the bending part of the pin to reduce the bending gap of the sub-pin. The groove is generally provided on the sub-pin or on the bending part connecting the sub-pin. When the groove is provided on the sub-pin, the effective width of the welding between the sub-pin and the tab will be reduced. When the groove is provided on the bending part connecting the sub-pin, it is easy to interfere with the bending of the sub-pin. Summary of the Utility Model

[0003] The embodiments of the utility model provide a pin structure, a cover plate assembly and a battery, which can improve the technical problems that the groove provided on the pin in the related art is easy to interfere with the bending of the pin and affect the effective width of the welding between the pin and the tab.

[0004] In a first aspect, the embodiments of the utility model provide a pin structure, including:

[0005] A pole column connection part configured to be connected with a pole column; and

[0006] A tab connection part including a connection plate and a mounting part. The connection plate includes a main body part and a connection part. The main body part extends along a first direction. One end of the main body part in the first direction is connected with the pole column connection part. The mounting part is configured to be connected with a tab;

[0007] Wherein, the connection plate includes a first sub-connection part and a second sub-connection part which are connected to each other. The first sub-connection part is arranged in a flat plate shape and is connected to one side of the main body part in a second direction. The second sub-connection part is arranged in an arc shape and is connected to the mounting part. The first direction intersects with the second direction. A groove extending along the first direction is provided on the connection part. A part of the groove is provided on the first sub-connection part, and the other part is provided on the second sub-connection part. The second sub-connection part is bent relative to the first sub-connection part at the groove.

[0008] In an embodiment, it is defined that the width of the part of the groove located on the first sub-connection part in the second direction is D1, and the thickness of the main body part in a third direction is H1. The first direction and the second direction are respectively perpendicular to the third direction;

[0009] Wherein, D1 and H1 satisfy: 0.5H1 ≤ D1 ≤ 1.5H1.

[0010] In one embodiment, the vertical distance from the connection between the first sub-connection part and the second sub-connection part to the main body part in the second direction is defined as L;

[0011] Wherein, L and D1 satisfy: D1 ≤ L.

[0012] In one embodiment, the connection part includes a first surface and a second surface which are oppositely arranged, and the groove is recessed from the first surface towards the second surface;

[0013] The vertical distance from the lowest point of the groove to the second surface is defined as H2; wherein, H2 and H1 satisfy: 7 / 20H1 ≤ H2 ≤ 3 / 5H1.

[0014] In one embodiment, the first surface includes a first sub-surface, the first sub-surface is arc-shaped, and the first sub-surface is arranged on the second sub-connection part;

[0015] The width of the part of the groove located on the second sub-connection part in the second direction is defined as D2, and the radius of the circle where the first sub-surface is located is defined as R;

[0016] Wherein, D2 and R satisfy:

[0017] In one embodiment, R and H1 also satisfy: 1 / 2H1 ≤ R ≤ H1.

[0018] In one embodiment, at least part of the groove wall of the groove is a curved surface.

[0019] In one embodiment, a fuse groove extending in the first direction is formed through the pole connection part; and / or,

[0020] A pole fixing hole extending in the first direction is formed through the pole connection part.

[0021] In a second aspect, an embodiment of the present invention provides a cover plate assembly, including:

[0022] A top cover, on which a pole is arranged; and

[0023] A pin structure, including the above pin structure, and the pole connection part is connected to the pole.

[0024] In a third aspect, an embodiment of the present invention provides a battery, including:

[0025] A core package, including a core package body and a tab extending from the core package body; and

[0026] A cover plate assembly, including the above cover plate assembly;

[0027] Wherein, the tab is connected to the installation part.

[0028] The beneficial effects of the embodiments of the present invention:

[0029] In the technical solution of the present application, a grooved slot is provided on the connecting portion. A part of the grooved slot is located on the first sub-connecting portion in the shape of a flat plate, and the other part is located on the second sub-connecting portion arranged in an arc shape, that is, the grooved slot is not entirely located on the second sub-connecting portion arranged in an arc shape. Therefore, when the mounting portion is bent, interference with the bending of the mounting portion can be avoided; in addition, the position of the grooved slot is not located on the mounting portion, so it will not occupy the welding area between the mounting portion and the tab, providing more space for the welding of the pin on the mounting portion and increasing the effective welding area between the tab and the pin structure. Brief Description of the Drawings

[0030] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those skilled in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0031] Figure 1 is a perspective schematic diagram of one perspective of the pin structure provided by the embodiment of the present invention;

[0032] Figure 2 is a perspective schematic diagram of another perspective of the pin structure provided by the embodiment of the present invention;

[0033] Figure 3 is a perspective schematic diagram of the pin structure provided by the embodiment of the present invention after the mounting portion is bent;

[0034] Figure 4 is a structural schematic diagram of the pin structure provided by the embodiment of the present invention after the mounting portion is bent;

[0035] Figure 5 is a structural schematic diagram of the pin structure provided by the embodiment of the present invention before the mounting portion is bent;

[0036] Figure 6 is Figure 5 an enlarged schematic diagram of portion A in

[0037] Figure 7 is Figure 5 an enlarged schematic diagram of portion A in

[0038] Figure 8 is Figure 5 an enlarged schematic diagram of portion A in

[0039] Figure 9 is a perspective schematic diagram of the cover plate assembly provided by the embodiment of the present invention.

[0040] Reference numerals:

[0041] 1. Pole connection part; 2. Pole; 3. Tab connection part; 31. Connection plate; 311. Main body part; 312. Connection part; 32. Mounting part; 3121. First sub-connection part; 3122. Second sub-connection part; 4. Groove; 5. First surface; 51. First sub-surface; 6. Second surface; 7. Fusing groove; 8. Pole fixing hole; 9. Top cover. Detailed implementation manners

[0042] The technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model. In addition, it should be understood that the specific implementation manners described herein are only used to illustrate and explain the present utility model, and are not used to limit the present utility model. In the present utility model, unless otherwise stated, the orientation words such as "upper" and "lower" generally refer to the upper and lower in the actual use or working state of the device, specifically the drawing direction in the accompanying drawings; and "inner" and "outer" refer to the outline of the device.

[0043] In a rechargeable battery, in order to better weld the tabs, generally the sub-pins connecting the core package tabs on the pins are bent, and the smaller the bending gap of the sub-pins, the better. In the related art, generally, a groove is provided near the bending part of the pin, and the bending gap of the sub-pin is reduced through the groove. The groove is generally provided on the sub-pin or on the bending part connecting the sub-pin. When the groove is provided on the sub-pin, the effective width of the welding between the sub-pin and the tab will be reduced. When the groove is provided on the bending part connecting the sub-pin, it is easy to interfere with the bending of the sub-pin.

[0044] In view of this, the present application proposes a pin structure. Figures 1 to 9 For some embodiments of the present application.

[0045] Please refer to Figures 1 to 2 , in some embodiments of the present application, the pin structure includes a pole connection part 1, the pole connection part 1 extends along the third direction X, and the pole connection part 1 is configured to be connected to the pole 2.

[0046] In some embodiments of the present application, the pin structure further includes an ear connection portion 3. The ear connection portion 3 includes a connection plate 31 and a mounting portion 32. The connection plate 31 includes a main body portion 311 and a connection portion 312. The main body portion 311 extends along the first direction Z. One end of the main body portion 311 in the first direction Z is connected to the pole connection portion 1. The connection portion 312 includes a first sub-connection portion 3121 and a second sub-connection portion 3122 that are connected to each other. The first sub-connection portion 3121 is arranged in a flat plate shape and is connected to one side of the main body portion 311 in the second direction Y. The second sub-connection portion 3122 is arranged in an arc shape and is connected to the mounting portion 32. The mounting portion 32 is configured to be connected to the ear; the mounting portion 32 can be bent toward the side of the main body portion 311 that deviates from the pole connection portion 1 in the third direction X through the connection portion 312. The side of the mounting portion 32 that deviates from the main body portion 311 in the second direction Y is for the ear to be fixedly installed.

[0047] Wherein, a groove 4 extending along the first direction Z is provided on the connection portion 312. A part of the groove 4 is provided on the first sub-connection portion 3121, and the other part is provided on the second sub-connection portion 3122. The second sub-connection portion 3122 is bent relative to the first sub-connection portion 3121 at the groove 4; that is, the setting of the groove 4 facilitates the relative bending of the first sub-connection portion 3121 and the second sub-connection portion 3122. Since the second sub-connection portion 3122 is connected to the mounting portion 32 and the first sub-connection portion 3121 is connected to the main body portion 311, the mounting portion 32 can be bent to the state as shown in Figure 3 and Figure 4 shown. Since the groove 4 is provided at the connection position of the first sub-connection portion 3121 and the second sub-connection portion 3122 in this embodiment, there is no interference with the mounting portion 32 during bending, and the surfaces of the bent mounting portion 32 and the main body portion 311 that are close to each other are parallel to each other.

[0048] In the technical solution of the present application, by providing the groove 4 on the connection portion 312, a part of the groove 4 is located on the flat-plate-shaped first sub-connection portion 3121, and the other part is located on the arc-shaped second sub-connection portion 3122, that is, the groove 4 is not completely located on the arc-shaped second sub-connection portion 3122. Therefore, interference with the bending of the mounting portion 32 can be avoided during the bending of the mounting portion 32; in addition, the position of the groove 4 is not located on the mounting portion 32, so it will not occupy the welding area between the mounting portion 32 and the ear, providing more space for the welding of the pin on the mounting portion 32 and increasing the effective welding area between the ear and the pin structure.

[0049] Please refer to Figures 5 to 6, in some embodiments of the present application, the width of a part of the groove 4 located on the first sub-connection part 3121 in the second direction Y is D1, and the thickness of the main body part 311 in the third direction X is H1; wherein, D1 and H1 satisfy: 0.5H1 ≤ D1 ≤ 1.5H1. In this embodiment, designing the D1 value and the H1 value to satisfy the range of 0.5H1 ≤ D1 ≤ 1.5H1 can improve the bending effect of the installation part 32, so that the fitting effect between the installation part 32 and the main body part 311 after bending is better. If the D1 value is less than 0.5H1, it will cause insufficient space for the groove 4 in the second direction Y, which is likely to interfere with the bending of the installation part 32 and affect the bending effect of the installation part 32; if the D1 value is greater than 1.5H1, it will make the vertical distance from the second sub-connection part 3122 to the main body part 311 in the second direction Y too large, thereby increasing the material cost of the pin structure and the weight of the pin structure.

[0050] In some embodiments of the present application, since at least a part of the groove 4 is located on the first sub-connection part 3121, the vertical distance from the connection position between the first sub-connection part 3121 and the second sub-connection part 3122 to the main body part 311 in the second direction Y is L; wherein, L and D1 satisfy: D1 ≤ L. Such a setting is to ensure that the groove 4 is located on the first sub-connection part 3121 and will not extend to the main body part 311 in the second direction Y.

[0051] In some embodiments of the present application, the thicknesses of the parts of the pin structure where the groove 4 is not provided are equal, that is, the thickness of the pin structure is H1.

[0052] Please refer to Figure 7 , in some embodiments of the present application, the connection part 312 includes a first surface 5 and a second surface 6 arranged opposite to each other, and the groove 4 is recessed from the first surface 5 towards the second surface 6.

[0053] Wherein, the vertical distance from the lowest point of the groove 4 to the second surface 5 is H2; wherein, H2 and H1 satisfy: 7 / 20H1 ≤ H2 ≤ 3 / 5H1. In this embodiment, designing H1 and H2 to satisfy 7 / 20H1 ≤ H2 ≤ 3 / 5H1 can improve the bending effect of the installation part 32, so that the fitting effect between the installation part 32 and the main body part 311 after bending is better; if H2 is less than 7 / 20H1, the thickness of the connection part 312 at the position where the groove 4 is provided is too small, so the current-carrying capacity of the connection part 312 at the groove 4 position is weak; if H2 is greater than 3 / 5H1, the thickness of the connection part 312 at the position where the groove 4 is provided is too large, that is, the depth of the groove 4 is too small, which in turn affects the bending of the installation part 32.

[0054] In one embodiment, the lowest part of the groove 4 may be located on the first sub-connection part 3121; in another embodiment, the lowest part of the groove 4 may also be located on the second sub-connection part 3122.

[0055] Please refer to Figure 7 and Figure 8 , in some embodiments of the present application, the first surface 5 includes a first sub-surface 51, the first sub-surface 51 is arc-shaped, and the first sub-surface 51 is disposed on the second sub-connection part 3122; that is, the first sub-surface 51 is the curved part of the second sub-connection part 3122.

[0056] Among them, the width of a part of the groove 4 located on the second sub-connection part 3122 in the second direction Y is D2, and the radius of the circle where the first sub-surface 51 is located is R; among them, the D2 and the R satisfy: In this embodiment, it is designed that R and D2 satisfy the interval range of, which can improve the bending effect of the mounting part 32, so that the fitting effect between the mounting part 32 and the main body part 311 after bending is better; if D2 is less than 12R, it will cause insufficient space of the groove 4 in the second direction Y, and then it is easy to interfere with the bending of the mounting part 32, affecting the bending effect of the mounting part 32; if D2 is greater than then there is too much part of the groove 4 provided on the second sub-connection part 3122, resulting in an increase in the thinning area on the second sub-connection part 3122, resulting in a rise in temperature when the current flows through the second sub-connection part 3122.

[0057] In some embodiments of the present application, R and H1 also satisfy: 1 / 2H1 ≤ R ≤ H1. In this embodiment, it is designed that R and H1 satisfy 1 / 2H1 ≤ R ≤ H1, which can improve the bending effect of the mounting part 32, so that the fitting effect between the mounting part 32 and the main body part 311 after bending is better; if R is greater than H1, it will increase the material usage cost of the second sub-connection part 3122; if R is less than 1 / 2H1, it is not conducive to the bending of the mounting part 32.

[0058] In some embodiments of the present application, at least part of the groove wall of the groove 4 is a curved surface, so as to avoid forming relatively sharp parts on the groove 4, avoid stress concentration at the connection part 312 at the groove 4 when the pin structure is bent, and at the same time, if there are sharp parts at the groove 4, it is easy to interfere with the bending of the mounting part 32; in one embodiment of the present application, the cross-section of the groove 4 is designed to be trapezoid-like. And the groove walls at all parts of the groove 4 are smoothly transitioned.

[0059] In some embodiments of the present application, a fusing groove 7 is provided on the pole connection part 1; the fusing groove 7 penetrates through the pole connection part 1 in the first direction Z; wherein, the design of the fusing groove 7 is such that in the second direction Y, the partial cross-sectional area of the pole connection part 1 on both sides of the fusing groove 7 is reduced. When the current increases sharply, the temperature of the parts of the pole connection part 1 on both sides of the fusing groove 7 rises instantaneously, causing the metal to fuse, thereby playing a role in safety protection.

[0060] In some embodiments of the present application, a pole fixing hole 8 is provided on the pole connection part 1; the pole fixing hole 8 penetrates through the pole connection part 1 in the first direction Z, and the pole 2 located on the top cover 9 is welded and fixed in the pole fixing hole 8.

[0061] Please refer to Figure 9 , the present utility model also proposes a cover plate assembly, which includes a top cover 9 and a pin structure. A pole 2 is provided on the top cover 9; the pin structure is as described above, and the pole connection part 1 in the pin structure is connected to the pole 2. Since this cover plate assembly adopts all the technical solutions of the above-mentioned all embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0062] Among them, since the poles 2 on the cover plate assembly are provided as two and are respectively a positive pole and a negative pole, the number of pin structures is two, one of the pin structures is connected to the positive pole, and the other pin structure is connected to the negative pole.

[0063] In some embodiments of the present application, the pin structure in the cover plate assembly is provided with a groove 4 on the connection part 312. A part of the groove 4 is located on the flat first sub-connection part 3121, and the other part is located on the arc-shaped second sub-connection part 3122, that is, the groove 4 is not entirely located on the arc-shaped second sub-connection part 3122. Therefore, when the installation part 32 is bent, interference with the bending of the installation part 32 can be avoided; in addition, the position of the groove 4 is not located on the installation part 32 either, so it will not occupy the welding area of the welding between the installation part 32 and the pole ear, providing more space for the welding of the pin on the installation part 32 and increasing the effective welding area between the pole ear and the pin structure.

[0064] The present utility model also proposes a battery, which includes a core package and a cover plate body. The core package includes a core package body and a pole ear extending from the core package body; the cover plate assembly is as described above, and the installation part 32 in the cover plate assembly is connected to the pole ear. Since this battery adopts all the technical solutions of the above-mentioned all embodiments, it at least has the beneficial effects brought by the technical solutions of the above-mentioned embodiments, and will not be elaborated here one by one.

[0065] The above has introduced the embodiments of the present utility model in detail. Specific examples are used herein to elaborate on the principle and implementation manner of the present utility model. The description of the above embodiments is only used to help understand the method and its core idea of the present utility model; at the same time, for those skilled in the art, according to the idea of the present utility model, there will be changes in the specific implementation manner and application scope. In summary, the content of this specification should not be construed as a limitation to the present utility model.

Claims

1. A pin structure, characterized in that: include: a pole connection portion, the pole connection portion being configured to be connected to a pole; and A pole lug connection portion, comprising a connection plate and a mounting portion, wherein the connection plate comprises a main body portion and a connection portion, wherein the main body portion extends along a first direction, one end of the main body portion in the first direction is connected to the pole connection portion, and the mounting portion is configured to be connected to the pole lug; Among them, the connecting plate includes a first sub-connecting part and a second sub-connecting part which are connected to each other, the first sub-connecting part is arranged in a flat plate shape and is connected to one side of the main body in the second direction, the second sub-connecting part is arranged in an arc shape and is connected to the mounting part, the first direction intersects with the second direction, and a groove extending along the first direction is arranged on the connecting part, a part of the groove is arranged on the first sub-connecting part, and the other part is arranged on the second sub-connecting part, and the second sub-connecting part is bent relative to the first sub-connecting part at the groove.

2. The pin structure according to claim 1, characterized in that: The width of the groove located on the first sub-connecting portion in the second direction is defined as D1, the thickness of the main body in the third direction is defined as H1, and the first direction and the second direction are respectively perpendicular to the third direction; Wherein, D1 and H1 satisfy: 0.5H1≤D1≤1.5H1.

3. The pin structure according to claim 2, characterized in that: Define a vertical distance from a connection point between the first sub-connection portion and the second sub-connection portion to the main body portion in the second direction as L; Wherein, L and D1 satisfy: D1≤L.

4. The pin structure according to claim 2, characterized in that: The connecting portion includes a first surface and a second surface that are arranged opposite to each other, and the groove is concavely arranged from the first surface to the second surface; The vertical distance from the lowest point of the groove to the second surface is defined as H2; wherein H2 and H1 satisfy: 7 / 20H1≤H2≤3 / 5H1.

5. The pin structure according to claim 4, characterized in that: The first surface includes a first sub-surface, the first sub-surface is arranged in an arc shape, and the first sub-surface is arranged on the second sub-connection portion; The width of the portion of the groove located on the second sub-connecting portion in the second direction is defined as D2, and the radius of the circle where the first sub-surface is located is defined as R; Wherein, D2 and R satisfy:

6. The pin structure according to claim 5, characterized in that: The R and the H1 also satisfy: 1 / 2H1≤R≤H1.

7. The pin structure according to any one of claims 1 to 6, characterized in that: At least a portion of the groove wall of the groove is a curved surface.

8. The pin structure according to any one of claims 1 to 6, characterized in that: The pole connecting portion is provided with a fuse slot extending along the first direction; and / or, The pole connecting portion is provided with a pole fixing hole extending along the first direction.

9. A cover plate assembly, characterized in that: include: A top cover, on which the pole is arranged; and A pin structure, comprising the pin structure according to any one of claims 1 to 8, wherein the pole connecting portion is connected to the pole.

10. A battery, characterized in that: include: The core package comprises a core package body and the tab extending from the core package body; and A cover plate assembly, comprising the cover plate assembly as claimed in claim 9; Wherein, the tab is connected to the mounting portion.

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