Pin structure, cover plate assembly and battery

Abstract

The utility model provides a pin structure, cover plate subassembly and battery, pin structure includes tab connecting part, tab connecting part includes main part and mounting part, main part extends along the first direction and is configured to be connected with the pole, mounting part and main part are connected with one side in the second direction, and the mounting part is configured to be connected with the pole. A gap is formed between the mounting part and the unconnected part of the main body part, the gap is configured to allow a tab to pass through, the mounting part is opposite to the core package body in a third direction, the mounting part comprises a tab connecting side deviating from the core package body in the third direction, and the tab connecting side is configured to allow the tab to be mounted; according to the technical scheme, the gap for the pole lug on the core package body to penetrate out is formed between the mounting part and the main body part in the pin structure, so that the pole lug can penetrate out of the gap and is welded on the pole lug connecting side on the mounting part.

Description

Technical Field

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

[0002] In the related art, the pins on the top cover of the battery are ultrasonically welded to the positive and negative tabs, thereby achieving the goal of conducting the current of the battery cell from the inside to the outside of the battery cell. Normally, the pins on the top cover of the battery cell are composed of a positive pin and a negative pin. After the tabs and pins are welded, the welding area between the tabs and the pins is bent inward or outward to flatten the pins for easy insertion into the shell. The inward bending solution has certain advantages in the horizontal assembly space of the battery cell, but the tab welding position is on the side of the core package, and the redundancy of the tabs can easily cause the tabs to be inserted into the core package inverted; the outward bending solution causes the pins to occupy more horizontal assembly space of the battery cell. Although it is safer, the core package assembly space is small and the assembly difficulty is higher. Utility Model Content

[0003] The embodiments of the present utility model provide a pin structure, a cover plate assembly and a battery, which can simultaneously improve the technical problem in the related art that the tabs are easily inserted into the core package after being welded to the pins, and the technical problem that the pins occupy too much lateral assembly space of the battery cell.

[0004] In a first aspect, an embodiment of the present invention provides a pin structure, comprising a tab connection portion, the tab connection portion comprising a main body portion and a mounting portion, the main body portion extending along a first direction and configured to be connected to a pole, the mounting portion being connected to one side of the main body portion in a second direction, a gap being defined between the mounting portion and an unconnected portion of the main body portion, the gap being configured to allow the tab to pass through, the mounting portion being opposite to a core package body in a third direction, the mounting portion comprising a tab connection side facing away from the core package body in the third direction, the tab connection side being configured to be mounted on the tab, the first direction and the second direction intersecting and being perpendicular to the third direction respectively;

[0005] The plane where the installation portion is located is parallel to the plane where the main body portion is located.

[0006] In one embodiment, the pin structure further includes a connecting portion, the connecting portion including a first sub-connecting portion extending along a first direction, the first sub-connecting portion being connected to the main body, and the main body being connected to the pole via the first sub-connecting portion;

[0007] Wherein, a vertical distance between the mounting portion and the core package body in the third direction is smaller than a vertical distance between the first sub-connection portion and the core package body in the third direction.

[0008] In one embodiment, a side of the first sub-connection portion facing away from the core package body in the third direction is a flat side;

[0009] The thickness of the mounting portion in the third direction is defined as D, and the vertical distance between the flat side and the tab connection side in the third direction is defined as D1; wherein D and D1 satisfy:

[0010] 0.5D≤D1≤D.

[0011] In one embodiment, the mounting portion and the main body are located on the same horizontal plane.

[0012] In one embodiment, the connecting portion further includes a second sub-connecting portion, the second sub-connecting portion connecting the first sub-connecting portion and the main body;

[0013] Wherein, at least a portion of the second sub-connection portion is bent.

[0014] In one embodiment, the second sub-connection portion includes:

[0015] The flat plate section is arranged obliquely relative to the main body and the first sub-connecting portion;

[0016] A first bending section connecting the flat section and the main body; and

[0017] The second bending section connects the flat plate section and the first sub-connecting portion.

[0018] In one embodiment, the angle between the flat plate segment and the main body is defined as α; wherein α satisfies: 90°≤α≤150°; and / or

[0019] The included angle between the flat plate segment and the first sub-connecting portion is defined as β, wherein β satisfies: 90°≤β≤150°.

[0020] In one embodiment, the mounting portion is bendably connected to the main body.

[0021] In one embodiment, the tab connection portion further includes at least one bent portion, and the bent portion connects the main body portion and the mounting portion.

[0022] In one embodiment, the bending portion is disposed between the main body portion and the mounting portion;

[0023] The bent portion does not protrude beyond the mounting portion and the main body in the first direction.

[0024] In one embodiment, the pin structure further includes a connecting portion, the connecting portion including a first sub-connecting portion extending along a first direction, the first sub-connecting portion being connected to the main body and configured to be connected to the pole;

[0025] The bent portion is close to a side of the main body portion facing away from the first sub-connecting portion in the first direction.

[0026] In one embodiment, the bent portion is connected to one side of the main body portion in the second direction.

[0027] In a second aspect, an embodiment of the present invention provides a cover plate assembly, comprising:

[0028] a top cover on which the poles are disposed; and

[0029] The pin structure includes the above pin structure, the pole connecting portion is connected to the pole, the main body is configured to be connected to the pole, and the tab connecting side on the mounting portion is configured for tab mounting.

[0030] In a third aspect, an embodiment of the present invention provides a battery, comprising:

[0031] The core package comprises a core package body and tabs extending from the core package body; and

[0032] A cover plate assembly, comprising the above cover plate assembly, wherein the tab connection portion is connected to the tab;

[0033] The tab extends from the gap and is bent, and the tab is fixed on the tab connection side.

[0034] Beneficial effects of the embodiments of the present utility model:

[0035] In the technical solution of the present application, a gap is formed between the mounting portion and the main body in the pin structure through which the tab on the core package body can pass through, so that the tab can pass through the gap and be welded to the tab connection side of the mounting portion. Since the plane where the mounting portion is located is parallel to the plane where the main body is located, compared with the method of bending the welding area between the tab and the pin outward after welding the tab and the pin in the related art, the main body and the mounting portion in the present application do not overlap in the third direction, so that the tab connection part will not occupy too much assembly space of the core package in the third direction, thereby improving the space utilization rate in the battery; in addition, since after the tab is installed, the part of the tab welded on the tab connection side is separated from the core package body by the mounting portion, compared with the method of bending the welding area between the tab and the pin inward after welding the tab and the pin in the related art, the tab welded on the tab connection side in the present application is not prone to the problem of the tab being inserted upside down onto the core package body. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

[0037] Figure 1 This is a three-dimensional schematic diagram of the mounting portion of the pin structure provided by an embodiment of the present utility model when it is in the second state;

[0038] Figure 2 This is a partial structural diagram of the mounting portion of the pin structure provided by an embodiment of the present utility model when it is in the second state;

[0039] Figure 3 This is a partial structural diagram of the mounting portion of the pin structure provided by an embodiment of the present utility model when it is in the second state;

[0040] Figure 4 This is a three-dimensional schematic diagram of the mounting portion of the pin structure provided by an embodiment of the present utility model when it is in a first state;

[0041] Figure 5 This is a three-dimensional schematic diagram of a mounting portion on a pin structure mounted on a battery cell provided by an embodiment of the present utility model in a first state;

[0042] Figure 6 It is a three-dimensional schematic diagram of the mounting portion of the pin structure mounted on the battery cell provided by an embodiment of the present utility model when it is in the second state.

[0043] Reference numerals:

[0044] 1. Pole connection part; 2. Tab connection part; 21. Main body; 22. Mounting part; 221. Tab connection side; 23. Bending part; 3. Gap; 4. Connection part; 41. First sub-connection part; 411. Plane side; 42. Second sub-connection part; 421. Flat section; 422. First bending section; 423. Second bending section; 5. Pole fixing hole; 6. Fuse slot; 7. Top cover; 8. Pole; 9. Core package; 91. Core package body; 92. Tab. DETAILED DESCRIPTION

[0045] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments in the present invention, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present invention. In addition, it should be understood that the specific implementation methods described herein are only used to illustrate and explain the present invention, and are not used to limit the present invention. In the present invention, unless otherwise specified, the directional words used, such as "upper" and "lower", generally refer to the upper and lower parts of the device in actual use or working state, specifically the drawing direction in the accompanying drawings; while "inside" and "outside" refer to the outline of the device.

[0046] This application proposes a pin structure. Figures 1 to 6As shown in the accompanying drawings, the X direction is the third direction, the Y direction is the second direction, and the Z direction is the first direction. The following description will be based on the first direction Z, the second direction Y, and the third direction X.

[0047] See also Figure 1 In some embodiments of the present application, the pin structure includes a tab connection portion 2, which is located on one side of the core package body 91 in the third direction X. The tab connection portion 2 includes a main body portion 21 and a mounting portion 22. The main body portion 21 extends along the first direction Z and is connected to the pole 8. The mounting portion 22 is arranged on one side of the main body portion 21 in the second direction Y. The mounting portion 22 includes a tab connection side 221. The tab connection side 221 is located on the side of the mounting portion 22 away from the core package body 91 in the third direction X. The tab connection side 221 is configured for welding and mounting the tab 92.

[0048] In some embodiments of the present application, a portion of the mounting portion 22 is connected to the main body 21, and a gap 3 is provided between the mounting portion 22 and the unconnected portion of the main body 21, and the gap 3 is provided for the tab 92 on the core package body 91 to pass through, so that the tab 92 can be welded to the tab connection side 221.

[0049] In the technical solution of the present application, a gap 3 is formed between the mounting portion 22 and the main body 21 in the pin structure so that the tab 92 on the core package body 91 can pass through, so that the tab 92 can pass through the gap 3 and be welded to the tab connection side 221 on the mounting portion 22. Since the plane where the mounting portion 22 is located is parallel to the plane where the main body 21 is located, compared with the method in the related art where the welding area between the tab and the pin is bent outward after the tab and the pin are welded, the main body 21 and the mounting portion 22 in the present application do not overlap in the third direction X. , so that the tab connection portion 2 will not occupy too much assembly space of the core package 9 in the third direction X, thereby improving the space utilization rate in the battery; in addition, since the tab 92 is installed, the part of the tab 92 welded on the tab connection side 221 is separated from the core package body 91 by the installation portion 22, compared with the method of bending the welding area between the tab and the pin inward after welding the tab in the related art, the tab 92 welded on the tab connection side 221 in the present application is not prone to the problem of the tab 92 being inserted upside down into the core package body 91.

[0050] It should be noted that since the core pack body 91 has a positive tab and a negative tab, and the top cover 7 is provided with a positive electrode post and a negative electrode post, two pin structures are provided in the battery: one pin structure connects the positive tab and the positive electrode post, and the other pin structure connects the negative tab and the negative electrode post. The tab 92 and the post 8 in the embodiment of the present application are merely illustrative; the tab 92 can be either a positive tab or a negative tab; and the post 8 can be either a positive post or a negative post.

[0051] In some embodiments of the present application, the pin structure also includes a connecting portion 4, which includes a first sub-connecting portion 41 extending along the first direction Z. The first sub-connecting portion 41 is connected to the main body 21, and the main body 21 is connected to the pole 8 through the first sub-connecting portion 41.

[0052] Among them, the vertical distance between the mounting portion 22 and the core package 9 in the third direction X is smaller than the vertical distance between the first sub-connecting portion 41 and the core package 9 in the third direction X; with such a design, when the pin structure is assembled into the battery, an installation space for accommodating the tab 92 can be formed on the pin structure, so that in the first direction Z, that is, when observing the pin structure from the perspective of the top cover 7, the tab 92 will be blocked by the first sub-connecting portion 41.

[0053] In some embodiments of the present application, the vertical distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core package body 91 in the third direction X is formed by bending a local structure in the pin structure.

[0054] In one embodiment, it may be formed by bending at the connection between the first sub-connection portion 41 and the main body portion 21; in another embodiment, it may be formed by bending at the connection between the main body portion 21 and the mounting portion 22; in yet another embodiment, it may be formed by bending at both the connection between the first sub-connection portion 41 and the main body portion 21 and the connection between the main body portion 21 and the mounting portion 22.

[0055] In some embodiments of the present application, the distance difference between the first sub-connecting portion 41 and the mounting portion 22 and the core package body 91 in the third direction X is formed at the connection between the first sub-connecting portion 41 and the main body 21. That is, the connecting portion 4 also includes a second sub-connecting portion 42, which connects the first sub-connecting portion 41 and the main body 21; wherein at least a portion of the second sub-connecting portion 42 is bent. In other words, in this embodiment, the bent second sub-connecting portion 42 creates a vertical distance difference between the first sub-connecting portion 41 and the mounting portion 22 and the core package body 91 in the third direction X, thereby providing space for the tab 92 to be installed on the pin structure.

[0056] See also Figures 2 to 3In some embodiments of the present application, the second sub-connection portion 42 includes a flat section 421, a first bent section 422, and a second bent section 423. The flat section 421 is inclined relative to the main body 21 and the first sub-connection portion 41. The first bent section 422 connects the flat section 421 and the main body 21, and the second bent section 423 connects the flat section 421 and the first sub-connection portion 41. That is, in this embodiment, the flat section 421 is connected to the main body 21 and the first sub-connection portion 41 through the first bent section 422 and the second bent section 423 respectively. The first bent section 422 and the second bent section 423 are formed by local bending of the pin structure. The shapes of the first bent section 422 and the second bent section 423 can be the same or different, and there is no limitation here.

[0057] See also Figure 3 In some embodiments of the present application, the angle between the flat section 421 and the main body 21 is defined as α; wherein α satisfies: 90°≤α≤150°; that is, by designing α to satisfy this interval range, the vertical distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core package body 91 in the third direction X can meet the space accommodation requirement of the tab 92; if α is less than 90 degrees, the bending angle between the second sub-connection portion 42 and the main body 21 is too large, which can easily cause the pin structure to tear; if α is greater than 150°, in order to satisfy the vertical distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core package body 91 in the third direction X, the second sub-connection portion 42 will occupy a larger space in the first direction Z, which may affect the welding of the tab 92 on the tab connection side 221.

[0058] The value of α can be 90°, 92°, 96°, 98°, 100°, 102°, 104°, 106°, 108°, 110°, 112°, 114°, 116°, 118°, 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, 142°, 144°, 146°, 148°, or 150°. The value of α is not limited to the values listed above, and other values not listed within the numerical range are also applicable.

[0059] In some embodiments of the present application, the angle between the flat section 421 and the first sub-connection portion 41 is defined as β; wherein, β satisfies: 90°≤β≤150°; that is, β is designed to satisfy this interval range, so that the vertical distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core package body 91 in the third direction X can meet the space accommodation requirement of the tab 92; if β is less than 90 degrees, the bending angle between the second sub-connection portion 42 and the first sub-connection portion 41 is too large, which can easily cause the pin structure to tear; if α is greater than 150°, in order to meet the vertical distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core package body 91 in the third direction X, the second sub-connection portion 42 will occupy a larger space in the first direction Z, which may affect the welding of the tab 92 on the tab connection side 221.

[0060] The value of β can be 90°, 92°, 96°, 98°, 100°, 102°, 104°, 106°, 108°, 110°, 112°, 114°, 116°, 118°, 120°, 122°, 124°, 126°, 128°, 130°, 132°, 134°, 136°, 138°, 140°, 142°, 144°, 146°, 148°, or 150°. The value of α is not limited to the values listed above, and other values not listed within the numerical range are also applicable.

[0061] See also Figure 4 In some embodiments of the present application, the side of the first sub-connection portion 41 facing away from the terminal connection portion 1 in the third direction X is defined as the flat side 411. The thickness of the mounting portion 22 in the third direction X is defined as D, and the vertical distance between the flat side 411 and the tab connection side 221 in the third direction X is defined as D1. Where D and D1 satisfy the following: 0.5D≤D1≤D. That is, D1 and D are set to satisfy this ratio range so that the distance difference between the first sub-connection portion 41 and the mounting portion 22 and the core pack body in the third direction X can meet the space requirements for accommodating the tab 92. If D1 is less than 0.5D, the height of the tab accommodation space in the third direction X is too small, which may cause the tab 92 to protrude from the flat side 411 in the third direction X. If D1 is greater than D, the space occupied by the pin structure in the third direction X may be too large, thereby reducing the space utilization within the battery.

[0062] It should be supplemented that, in order to facilitate the processing of the pin structure, in some embodiments of the present application, the overall thickness of the pin structure is also D.

[0063] In some embodiments of the present application, the mounting portion 22 and the main body 21 are located on the same horizontal plane. That is, in this embodiment, the mounting portion 22 and the main body 21 are both attached to the side surface of the core package body 91 in the third direction X, further reducing the space occupied by the tab connection portion 2 in the third direction X.

[0064] See also Figure 4 In some embodiments of the present application, the mounting portion 22 is bendably connected to the main body 21. That is, in this embodiment, the mounting portion 22 has a first state and a second state. In the first state, the plane where the mounting portion 22 is located intersects with the plane where the main body 21 is located, and the tab connection side 221 faces the gap 3. In the second state, the plane where the mounting portion 22 is located is parallel to the plane where the main body 21 is located.

[0065] In some embodiments of the present application, the initial state of the mounting portion 22 is the first state, and when the pole tab 92 extends from the gap 3, it can be directly fitted with the pole tab connection side 221, so that the operator or the operating device can weld and fix the pole tab 92 to the pole tab connection side 221. After the pole tab 92 and the mounting portion 22 are welded and fixed, the mounting portion 22 is bent to the second state, so that the mounting portion 22 is fitted as a whole to the side of the core package body 91, so that when the core package 9 is put into the shell, it will not occupy too much assembly space of the core package 9 in the third direction X, thereby improving the space utilization rate inside the battery.

[0066] In some embodiments of the present application, when the mounting portion 22 is in the first state, the mounting portion 22 is perpendicular to the main body portion 21, that is, the extension direction of the mounting portion 22 is the same as the extension direction of the tab 92, thereby facilitating the operator or operating device to weld and fix the tab 92 to the tab connection side 221.

[0067] In some embodiments of the present application, the tab connection portion 2 further includes at least one bending portion 23, which connects the main portion 21 and the mounting portion 22. The mounting portion 22 is connected to the main portion 21 via the bending portion 23 to achieve an angled bend of the mounting portion 22 relative to the main portion 21. The number of bending portions 23 is not limited, and may be one or more. In one embodiment, two bending portions 23 may be provided, both of which are provided between the main portion 21 and the mounting portion 22 and spaced apart in the first direction Z. The two bending portions 23, the main portion 21, and the mounting portion 22 enclose a gap 3. Furthermore, the location of the bending portion 23 is not limited, and the bending portion 23 may be entirely between the main portion 21 and the mounting portion 22, or not located between the main portion 21 and the mounting portion 22, or part of the bending portion 23 may be located between the main portion 21 and the mounting portion 22 and part of the bending portion 23 may not be located between the main portion 21 and the mounting portion 22.

[0068] In some embodiments of the present application, the bending portion 23 is arranged between the main body 21 and the mounting portion 22; the bending portion 23 does not protrude from the mounting portion 22 and the main body 21 in the first direction Z; that is, it is arranged in this way, so that the overall material utilization rate of the pin structure is high and the blanking efficiency is high; the overall pin structure does not have any protruding sharp edges, and the overall pin structure is simple.

[0069] In some embodiments of the present application, in order to adapt the protruding position of the pole ear 92 on the core package body 91 so that the pole ear 92 can pass through the gap 3 without being interfered with by the bending portion 23, the bending portion 23 is set close to the side of the main body 21 away from the first sub-connection portion 41 in the first direction Z.

[0070] In some embodiments of the present application, the bending portion 23 is connected to one side of the main body 21 in the second direction Y; that is, in this embodiment, when the pin structure is assembled on the core package 9, the main body 21, the mounting portion 22 and the bending portion 23 can all be attached to one side of the core package body 91 in the third direction X, so that the tab connection portion 2 is attached as a whole to the side of the core package body 91, so that when the core package 9 is put into the shell, it will not occupy too much assembly space of the core package 9 in the third direction X, thereby improving the space utilization rate inside the battery.

[0071] Please refer again Figure 1 In some embodiments of the present application, the pin structure further includes a pole connecting portion 1 , the pole connecting portion 1 is connected to the pole 8 , and the pole connecting portion 1 is connected to the tab connecting portion 2 .

[0072] In some embodiments of the present application, the pole connecting portion 1 is connected to the main body 21 of the tab connecting portion 2 through the first sub-connecting portion 41 .

[0073] In some embodiments of the present application, the pole connecting portion 1 extends along the third direction X; wherein the pole connecting portion 1 is located between the top cover 7 and the core package body 91 and is connected to the pole 8 .

[0074] In some embodiments of the present application, a pole fixing hole 5 extending along the first direction Z is further formed on the pole connecting portion 1 ; wherein the pole 8 on the top cover 7 is welded and fixed in the pole fixing hole 5 .

[0075] In some embodiments of the present application, a fuse slot 6 extending along the first direction Z is further provided through the pole connection portion 1; wherein, the design of the fuse slot 6 is such that in the second direction Y, the cross-sectional area of the portion of the pole connection portion 1 located on both sides of the fuse slot 6 is reduced. When the current increases sharply, the temperature of the portion of the pole connection portion 1 on both sides of the fuse slot 6 rises instantaneously, causing the metal to melt, thereby playing a role of safety protection.

[0076] The present invention also proposes a cover assembly, which includes a top cover 7 and a pin structure. A pole 8 is provided on the top cover 7, and the pin structure is as described above. Since the cover assembly adopts all the technical solutions of all the above embodiments, it has at least the beneficial effects brought by the technical solutions of the above embodiments, which will not be described one by one here.

[0077] See also Figures 5 and 6 The present invention further provides a battery comprising a core pack 9 and a cover plate assembly. The core pack 9 comprises a core pack body 91 and a tab 92 extending therefrom. The cover plate assembly is as described above, wherein the tab 92 extends from the gap 3 and is bent. The tab 92 is fixed to the tab connection side 221. Because the present battery utilizes all of the technical solutions of all of the above embodiments, it at least possesses the beneficial effects of the technical solutions of the above embodiments, which will not be detailed here.

[0078] See also Figure 5 When the tab 92 is welded to the mounting portion 22, the mounting portion 22 is in the first state, so that the tab 92 is aligned with the mounting portion 22 in the second direction Y after passing through the gap 3. The tab 92 can be directly welded to the tab connection side 221 on the mounting portion 22; see Figure 6 After the welding of the tab 92 is completed, the mounting portion 22 is bent so that the mounting portion 22 is in the second state. At this time, the mounting portion 22 is attached to the side of the core package body 91, and the tab 92 is bent together with the mounting portion 22, thereby reducing the space occupied by the tab connection portion 2 in the third direction X. When the core package 9 enters the battery shell, the tab connection portion 2 will not occupy too much assembly space of the core package 9 in the third direction X, thereby improving the space utilization rate inside the battery.

[0079] The above is a detailed introduction to the embodiments of the present invention. Specific examples are used in this article to illustrate the principles and implementation methods of the present invention. The description of the above embodiments is only used to help understand the method and core idea of the present invention. At the same time, for those skilled in the art, based on the idea of the present invention, there will be changes in the specific implementation methods and application scope. In summary, the contents of this specification should not be understood as limiting the present invention.

Claims

1. A pin structure, characterized in that: The terminal comprises a tab connection portion, the tab connection portion comprising a main body portion and a mounting portion, the main body portion extending along a first direction and being configured to be connected to a pole, the mounting portion being connected to one side of the main body portion in a second direction, a gap being defined between the mounting portion and an unconnected portion of the main body portion, the gap being configured to allow the tab to pass through, the mounting portion being opposite to the core package body in a third direction, the mounting portion comprising a tab connection side facing away from the core package body in the third direction, the tab connection side being configured to be mounted on the tab, the first direction and the second direction intersecting and being perpendicular to the third direction respectively; Wherein, the plane where the installation portion is located is parallel to the plane where the main body portion is located.

2. The pin structure according to claim 1, characterized in that: The pin structure further includes a connecting portion, the connecting portion including a first sub-connecting portion extending along the first direction, the first sub-connecting portion being connected to the main body, and the main body being connected to the pole via the first sub-connecting portion; Wherein, a vertical distance between the mounting portion and the core package body in the third direction is smaller than a vertical distance between the first sub-connection portion and the core package body in the third direction.

3. The pin structure according to claim 2, characterized in that: The side of the first sub-connection portion facing away from the core package body in the third direction is a flat side; The thickness of the mounting portion in the third direction is defined as D, and the vertical distance between the plane side and the tab connection side in the third direction is defined as D1; wherein D and D1 satisfy: 0.5D≤D1≤D.

4. The pin structure according to claim 2, characterized in that: The mounting portion and the main body portion are located on the same horizontal plane.

5. The pin structure according to claim 2, characterized in that: The connecting portion further includes a second sub-connecting portion, the second sub-connecting portion connecting the first sub-connecting portion and the main body; Wherein, at least a portion of the second sub-connection portion is bent.

6. The pin structure according to claim 5, characterized in that: The second sub-connecting portion includes: a flat plate section, arranged obliquely relative to the main body and the first sub-connecting portion; a first bending section connecting the flat section and the main body; and The second bending section connects the flat plate section and the first sub-connecting portion.

7. The pin structure according to claim 6, characterized in that: The angle between the flat plate segment and the main body is defined as α; wherein α satisfies: 90°≤α≤150°; and / or The included angle between the flat plate segment and the first sub-connecting portion is defined as β; wherein β satisfies: 90°≤β≤150°.

8. The pin structure according to any one of claims 1 to 7, characterized in that: The mounting portion is bendably connected to the main body portion.

9. The pin structure according to claim 8, characterized in that: The tab connection portion further includes at least one bending portion, and the bending portion connects the main body portion and the mounting portion.

10. The pin structure according to claim 9, characterized in that: The bending portion is arranged between the main body portion and the mounting portion; The bent portion does not protrude beyond the mounting portion and the main body in the first direction.

11. The pin structure according to claim 9, characterized in that: The pin structure further includes a connecting portion, the connecting portion including a first sub-connecting portion extending along the first direction, the first sub-connecting portion being connected to the main body and configured to be connected to the pole; The bent portion is close to a side of the main body portion facing away from the first sub-connecting portion in the first direction.

12. The pin structure according to claim 9, characterized in that: The bent portion is connected to one side of the main body portion in the second direction.

13. A cover plate assembly, characterized in that: include: a top cover, on which the pole is provided; and A pin structure comprising the pin structure according to any one of claims 1 to 12, wherein the main body is configured to be connected to the pole, and the tab connection side on the mounting portion is configured to be mounted on the tab.

14. 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 according to claim 13; The tab extends from the gap and is bent, and the tab is fixed on the tab connection side.

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