CN220341462U - Pin structure, cover plate assembly, single battery, battery and electric equipment - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a pin structure, a cover plate assembly, a single battery, a battery and electric equipment. The pin structure is used for electrically connecting a battery cell in a single battery to a pole of the single battery; the pin structure comprises a pin body and a connecting piece, wherein the pin body is provided with a bending part, and the connecting piece is arranged at the bending part so as to increase the cross section area of the pin body at the bending part. The pin structure that this application provided is through installing the connecting piece in the department of bending of pin body to control connecting piece laminating pin body, increase pin structure in the cross-sectional area that overflows of department of bending, improve overcurrent capacity, in order to optimize, avoid bending the department to generate heat even, and then promote the structural performance and the life of the battery cell of using this pin structure. Therefore, the pin structure provided by the application can improve the structural performance of the single battery and prolong the service life of the single battery by optimizing the structure of the pin structure.

Description

Pin structure, cover plate assembly, single battery, battery and electric equipment

Technical Field

The utility model relates to the technical field of batteries, in particular to a pin structure, a cover plate assembly, a single battery, a battery and electric equipment.

Background

In the existing single battery, the pin has small overcurrent area at the bending position and poor overcurrent capacity, so that the pin is easy to heat and has larger temperature rise at the bending position. It is worth noting that when the temperature rise phenomenon occurs at the pin, the thermal runaway of the single battery is extremely easy to occur, and the safety performance and the service life of the battery are further affected.

Disclosure of Invention

The utility model provides a pin structure, a cover plate assembly, a single battery, a battery and electric equipment.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

according to a first aspect of the present utility model, there is provided a pin structure for electrically connecting a cell within a cell to a post of the cell; the pin structure comprises a pin body and a connecting piece, wherein the pin body is provided with a bending part, and the connecting piece is arranged at the bending part so as to increase the cross section area of the pin body at the bending part.

It should be noted that, the pin structure that this application provided is through installing the connecting piece in the department of bending of pin body to control connecting piece laminating pin body, increase pin structure in the cross-sectional area of crossing of department of bending, improve the overcurrent ability, in order to optimize, avoid bending the department to generate heat even, and then promote the structural performance and the life of the monomer battery of using this pin structure.

According to a second aspect of the present utility model, there is provided a cover plate assembly comprising: the two pin structures have opposite polarities, and at least one of the two pin structures is a pin structure provided in any of the above first aspects.

It should be noted that, the apron subassembly that this application provided includes two opposite pin structures of polarity, and the connecting piece in at least one pin structure is installed in the department of bending of pin body in two pin structures to control connecting piece laminating pin body, increase pin structure in the overcurrent cross-sectional area of department of bending, improve overcurrent ability, in order to optimize, avoid bending the department to generate heat even, and then promote the structural performance and the life of the battery cell of using this pin structure.

According to a third aspect of the present utility model, there is provided a single cell comprising a cover plate assembly as provided in any of the above second aspects.

It should be noted that, the battery cell that this application provided includes the apron subassembly among the above-mentioned second aspect, and the connecting piece in at least one pin structure among two pin structures in the apron subassembly is installed in the department of bending of pin body to control connecting piece laminating pin body, increase the overcurrent cross-section area of pin structure in the department of bending, improve overcurrent capacity, in order to optimize, avoid bending the department to generate heat even, and then promote the structural performance and the life of the battery cell of using this pin structure.

According to a fourth aspect of the present utility model, there is provided a battery comprising a single cell as provided in any of the above third aspects.

It should be noted that, the battery that this application provided includes the battery cell in the above-mentioned third aspect, in this battery cell, the connecting piece in at least one pin structure in two pin structures is installed in the department of bending of pin body to control connecting piece laminating pin body, increase the overcurrent cross-section area of pin structure in the department of bending, improve overcurrent capacity, in order to optimize, avoid bending department heating even, and then promote the structural performance and the life of battery cell who uses this pin structure, and, promote the security performance and the life of battery.

According to a fifth aspect of the present utility model, there is provided a powered device, including a battery as provided in any of the above fourth aspects.

It should be noted that, the electric equipment that this application provided includes the battery in the above-mentioned fourth aspect, in this battery, the connecting piece in at least one pin structure among two pin structures of every battery cell is installed in the department of bending of pin body to control connecting piece laminating pin body, increase pin structure in the overcurrent cross-section area of department of bending, improve overcurrent capacity, in order to optimize, avoid bending department heating even, and then promote the structural performance and the life of the battery cell of using this pin structure, and, promote the security performance and the life of battery, even electric equipment.

Drawings

For a better understanding of the present application, reference may be made to the embodiments illustrated in the following drawings. The components in the drawings are not necessarily to scale and related elements may be omitted in order to emphasize and clearly illustrate the technical features of the present application. In addition, the relevant elements or components may have different arrangements as known in the art. Furthermore, in the drawings, like reference numerals designate identical or similar parts throughout the several views. Wherein:

fig. 1 is a schematic structural diagram of a pin structure provided in an embodiment of the present application;

FIG. 2 is an enlarged schematic view of the connector of FIG. 1;

FIG. 3 is an enlarged schematic view of the heat conducting member in FIG. 1;

fig. 4 is an exploded view of a single battery according to an embodiment of the present disclosure;

fig. 5 is a schematic half-section view of a single battery provided in an embodiment of the present application.

The reference numerals are explained as follows:

100. a pin structure; 110. a pin body; 111. a first portion; 112. a second portion; 120. a connecting piece; 121. a through groove; 130. a heat conductive member; 200. lower plastic; 300. a cover plate body; 400. applying plastic; 500. a pole connection block; 600. a seal ring; 700. a pole; A. and a hole is penetrated.

Detailed Description

The technical solutions in the exemplary embodiments of the present application will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present application. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present application, and it is therefore to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present application.

In the description of the present application, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying relative importance unless explicitly specified or limited otherwise; the term "plurality" refers to two or more than two; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, references to "the/" object or "an" object are likewise intended to mean one of a possible plurality of such objects.

Unless specified or indicated otherwise, the terms "connected," "fixed," and the like are to be construed broadly and are, for example, capable of being fixedly connected, detachably connected, or integrally connected, electrically connected, or signally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the terms in the present application can be understood by those skilled in the art according to the specific circumstances.

Further, in the description of the present application, it should be understood that the terms "upper", "lower", "inner", "outer", and the like, which are described in the exemplary embodiments of the present application, are described with the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present application. It will also be understood that in the context of an element or feature being connected to another element(s) "upper," "lower," or "inner," "outer," it can be directly connected to the other element(s) "upper," "lower," or "inner," "outer," or indirectly connected to the other element(s) "upper," "lower," or "inner," "outer" via intervening elements.

In a first aspect, embodiments of the present application provide a pin structure. Fig. 1 is a schematic structural diagram of a pin structure provided in an embodiment of the present application; FIG. 2 is an enlarged schematic view of the connector of FIG. 1; FIG. 3 is an enlarged schematic view of the heat conducting member in FIG. 1; fig. 4 is an exploded view of a single battery according to an embodiment of the present disclosure; fig. 5 is a schematic half-section view of a single battery provided in an embodiment of the present application.

Referring to the structures shown in fig. 1 to 3 in conjunction with fig. 4 and 5, the lead structure 100 provided in the embodiment of the present application is used to electrically connect a battery cell in a single battery to a post 700 of the single battery; the pin structure 100 includes a pin body 110 and a connecting member 120, wherein the pin body 110 has a bending portion, and the connecting member 120 is mounted at the bending portion to increase the cross-sectional area of the pin body 110 at the bending portion.

As shown in fig. 1 and fig. 2, it should be noted that, in the pin structure 100 provided in this embodiment of the present application, the connecting piece 120 is installed at the bending position of the pin body 110, so as to control the connecting piece 120 to attach to the pin body 110, increase the overcurrent cross-sectional area of the pin structure 100 at the bending position, improve the overcurrent capability, so as to optimize and even avoid heating at the bending position, and further improve the structural performance and the service life of the single battery applying the pin structure 100.

It is noted that, the pin structure 100 provided in the embodiment of the present application may be manufactured by a stamping and forming process, so as to improve the manufacturing efficiency and reduce the manufacturing cost. In addition, when the lead structure 100 is formed by using a stamping process, the consistency of the plurality of prepared lead structures 100 can be improved, so that the yield of the single battery applying the lead structure 100 can be improved.

In one embodiment, please continue to refer to the structure shown in fig. 2 in conjunction with fig. 1 and 4, the connecting member 120 is a U-shaped structure, the U-shaped structure has an opening, a portion of the pin body 110 is disposed in the U-shaped structure from the opening, and the connecting member 120 is welded with the pin body 110.

It should be noted that, after the pin body 110 is disposed in the connecting piece 120, the inner wall of the U-shaped structure may contact the pin body 110, so as to improve the contact area between the two, ensure that the total overcurrent cross-sectional area formed by the U-shaped structure and the pin body 110 in cooperation is continuously effective, and further improve the overcurrent capability of the pin structure 100 provided in the embodiment of the present application.

It should be noted that, in order to improve the stability of the connection relationship between the connector 120 and the pin body 110, the connector 120 and the pin body 110 are soldered. During the use of the pin structure 100, the connecting member 120 can stably perform the function of increasing the cross-sectional area of the current flowing at the bending position of the pin body 110, so as to ensure the stable current flowing capability of the pin structure 100.

In the specific forming of the connecting member 120, in a specific embodiment, the connecting member 120 may be formed by bending a plate, that is, bending a plate to form a U-shaped structure; in another specific embodiment, the connector 120 may be formed by cutting or stamping a metal block structure, illustratively, as shown in FIG. 2, having through slots 121 to form a U-shaped structure. It should be appreciated that the cross-sectional dimension of the metal block may be set larger as required, so as to increase the overcurrent cross-sectional area formed by the cooperation of the connecting piece 120 and the pin body 110, improve the overcurrent capacity, avoid the heating condition at the bending position, and further improve the structural performance and the service life of the single battery applying the pin structure 100.

It should be noted that the depth of the U-shaped structure of the connection member 120 may be adapted to the thickness of the pin body 110 at this location, and, for example, as shown in fig. 1, after the connection member 120 is mounted on the pin body 110, two ends of the U-shaped structure do not exceed a surface of a side of the pin body 110 facing away from the connection member 120. This structure sets up, on the one hand, can guarantee that the excessive current cross-sectional area that connecting piece 120 and pin body 110 cooperation formed is maximized, on the other hand, can avoid connecting piece 120 to occupy too much space in the casing, avoid even contacting the casing, initiate the short circuit. In general, the structural arrangement may enhance the structural performance, safety, and life of the battery cells to which the lead frame 100 is applied.

In one embodiment, the connecting member 120 is made of the same material as the pin body 110.

It should be noted that, when the two materials are the same, the welding difficulty of the connecting piece 120 and the pin body 110 can be reduced, and the connection strength of the connecting piece 120 and the pin body 110 after welding can be improved, so that the connecting piece 120 can stably exert the function of increasing the overcurrent cross-sectional area at the bending position of the pin body 110 in the use process, and the overcurrent capacity of the pin structure 100 is ensured to be stable.

Of course, the materials of the connecting piece 120 and the pin body 110 may be different, for example, the connecting piece 120 may be made of a material with a stronger overcurrent capability, so as to optimize the overcurrent capability of the integral structure formed after the connecting piece 120 is connected with the pin body 110, which is not described in detail.

In one embodiment, referring to the structure shown in fig. 1 in conjunction with fig. 4 and 5, the pin body 110 includes a first portion 111 and a second portion 112, the second portion 112 is connected to the first portion 111, and the second portion 112 cooperates with the first portion 111 to form an L-shaped structure. Specifically, the first portion 111 is used to connect to the post 700, and the second portion 112 is used to connect to the battery cell.

It should be noted that, the L-shaped pin body 110 may connect the tab portions located at different positions of the battery cell with the pole 700, so as to reasonably utilize the internal space of the housing and improve the space utilization rate in the single battery.

When the position of the connecting piece 120 is specifically set, the connecting piece 120 is installed at the top end of the second portion 112, and a side surface of the connecting piece 120, which is close to the first portion 111, is in contact with the bottom surface of the first portion 111, so as to ensure the connection area of the connecting piece 120 and the pin body 110, so that the connecting piece 120 and the pin body 110 are better attached, the overcurrent cross-sectional area is improved, and the overcurrent capacity is improved.

In one embodiment, as shown in fig. 1, a through hole a for passing through the pole 700 is provided on the pin body 110; the number of the penetrating holes A is 2.

For example, referring to the structure shown in fig. 1, 4 and 5, two through holes a are formed in the first portion 111 to correspondingly mount two poles 700, and specifically, one pole 700 is mounted in each through hole a. It should be understood that the two posts 700 penetrating each pin body 110 have the same polarity.

It should be noted that, the structural design in this embodiment can improve the overcurrent capability of the battery, so as to improve the structural performance of the single battery applying the pin structure 100.

It should be noted that, the pin structure 100 provided in the embodiment of the present application has stronger overcurrent capability than other structures, and can be used for a single battery with a large required multiplying power.

In a second aspect, embodiments of the present application also provide a cover plate assembly. Referring to fig. 4 and 5 in conjunction with fig. 1 to 3, a cover plate assembly provided in an embodiment of the present application includes: two pin structures 100, the polarities of the two pin structures 100 are opposite, and at least one of the two pin structures 100 is a pin structure 100 provided in any of the technical solutions of the first aspect.

It should be noted that, the cover plate assembly provided in this embodiment of the present application includes two pin structures 100 with opposite polarities, and the connecting piece 120 in at least one pin structure 100 of the two pin structures 100 is installed at the bending position of the pin body 110, so as to control the connecting piece 120 to attach to the pin body 110, increase the overcurrent cross-sectional area of the pin structure 100 at the bending position, improve the overcurrent capability, so as to optimize and even avoid heating at the bending position, and further improve the structural performance and service life of the single battery applying the pin structure 100.

It should be appreciated that the unit cell has two polar poles 700, and the polar poles 700 of different polarities are mounted to different lead structures 100. In addition, it should be noted that the poles 700 with different polarities may be located on the same cover assembly, or may be located on two cover assemblies with different polarities, which is not described in detail.

In a specific embodiment, as shown in fig. 4 and 5, the cover plate assembly provided in the embodiment of the present application includes a positive-polarity pin structure 100 and a negative-polarity pin structure 100, where the positive-polarity pin structure 100 and the negative-polarity pin structure 100 are the same as the pin structure 100 described above.

In an embodiment, the cover assembly provided in the embodiment of the present application further includes a cover body 300, the pin structure 100 is disposed on one side of the cover body 300, and the heat conducting member 130 is disposed between the pin body 110 and the cover body 300 in the pin structure 100.

It should be noted that, the heat conducting member 130 is used for reducing the temperature rise degree of the pin body 110, and can separate the inner walls of the shells of the pin body 110 and the single battery, and further conduct out the temperature through the heat conducting member 130, so as to solve the problem of large temperature rise at the bending position of the pin structure 100.

Meanwhile, the heat conductive member 130 can separate the lead body 110 from the inner wall of the case of the battery through its own insulation property, so as to avoid contact between the lead body 110 and the case, and further avoid the problem of short circuit between the positive/negative polarity post 700 and the case caused by contact, thereby improving the safety performance of the battery cell.

In a specific embodiment, as shown in fig. 4 and 5, one end of the pin body 110 is connected to the pole 700 of the single battery, and the other end is in a U-shaped structure, which is respectively connected to the pole ears of the two battery cores, and a space is reserved in the U-shaped structure, so as to meet the welding requirements of the welding head on the pole ears and the pin structure 100.

In addition, the heat conducting member 130 can also be used for preventing heat generated by the pin body 110 from being transferred to the insulating film of the battery cell, so that the pin body 110 is prevented from generating a large amount of heat and burning out the insulating film of the battery cell when overcurrent occurs, and the insulating film can stably perform an insulating function, so that the safety performance and the service life of the single battery are further improved.

In one embodiment, the heat conductive member 130 is an L-shaped structure; the heat conducting member 130 extends from a side surface of the second portion 112 of the lead body 110 facing away from the connecting member 120 to a top surface of the first portion 111 of the lead body 110.

It should be noted that, in this structural arrangement, the heat generated by the second portion 112 in the pin body 110 can be effectively transferred to the first portion 111, so as to be dissipated through the cover plate body 300, so as to avoid heat accumulation inside the housing; meanwhile, the heat generated by the pin body 110 can be further prevented from being transferred to the insulating film of the battery cell, so that the pin body 110 is prevented from generating a large amount of heat and burning out the insulating film of the battery cell when overcurrent occurs, and the insulating film can stably exert an insulating function, so that the safety performance and the service life of the single battery are further improved.

In one embodiment, a slot is formed on a surface of the cover body 300 facing the pin body 110, and the slot extends to a side surface of the cover body 300; at least a portion of the heat conductive member 130 is disposed in the slot.

It should be noted that, this structure setting can promote the stability of heat conduction spare 130 after installing in pin body 110, and can reduce the independent occupation space of heat conduction spare 130 in the inside of casing to promote the space utilization in the battery cell, and then promote the energy density of battery cell.

When the cover assembly is provided, the cover body 300 in the cover assembly may be a metal member, and in order to avoid short circuit at the junction between the heat conducting member 130 and the cover body 300, insulation between the heat conducting member 130 and the cover body 300 is required.

In a specific embodiment, the heat conducting member 130 is an insulating heat conducting member 130. Illustratively, the thermally conductive member 130 is made of an insulating thermally conductive material, such as silicon carbide, insulating ceramic, aluminum nitride, and the like.

In another embodiment, an insulating structure is provided between the heat conducting member 130 and the cover body 300. For example, the surface of the heat conducting member 130 and/or the cover plate body 300 is coated with an insulating material, or an insulating spacer is disposed between the heat conducting member 130 and the cover plate body 300, which is not described in detail.

With continued reference to the structure illustrated in fig. 4 and 5, the cover plate assembly further includes: each two poles 700 corresponds to one pin structure 100, and one end of each pole 700 is connected to the corresponding pin structure 100, and the other end passes through the cover plate body 300.

The positive pole 700 passes through the positive pin structure 100 and the cap plate body 300 for connecting with the positive pole of the external device; the negative polarity post 700 passes through the negative polarity pin structure 100 and the cap plate body 300 and is used to connect with a negative electrode of an external device, thereby supplying power to the external device.

With continued reference to the structures shown in fig. 4 and 5, the cover plate assembly provided in the embodiment of the present application further includes: the upper plastic 400 is disposed on the side of the cover body 300 facing away from the lead structure 100, and the post 700 penetrates the upper plastic 400. The upper plastic 400 is capable of conducting electricity, thereby increasing the on-resistance between the cap body 300 and the positive polarity pole 700 and the negative polarity pole 700.

With continued reference to the structures shown in fig. 4 and 5, the cover plate assembly provided in the embodiment of the present application further includes: the lower plastic 200, the lower plastic 200 is sandwiched between the cover body 300 and the lead body 110, and the pole 700 penetrates the lower plastic 200.

As shown in fig. 4 and 5, the cover assembly further includes a sealing ring 600, four mounting holes are formed in the lower plastic 200 corresponding to the positive pole 700 and the negative pole 700, the positive pole 700 and the negative pole 700 are respectively inserted into the four mounting holes, and the sealing ring 600 is used for sealing a gap between an inner wall of the mounting hole and the positive pole 700 and a gap between an inner wall of the mounting hole and the negative pole 700. Preferably, the sealing member is a sealing rubber ring, two sealing rubber rings are arranged, one is sleeved on the positive pole 700 and clamped between the lower plastic 200 and the positive pole 700, and the other is sleeved on the negative pole 700 and clamped between the lower plastic 200 and the negative pole 700.

With continued reference to the structure illustrated in fig. 4 and 5, the cover plate assembly further includes: the pole connection block 500, the pole connection block 500 is arranged on one side of the upper plastic 400, which is away from the cover plate body 300, and two poles 700 with the same polarity are connected through one pole connection block 500.

It should be noted that the heat conductive member 130 is substantially disposed between the lead body 110 and the lower plastic 200. For example, the heat conductive member 130 may be crimped between the lead body 110 and the lower plastic 200, thereby isolating the lead body 110 from the inner wall of the case of the battery to further guide out the temperature through the heat conductive member 130. As shown in fig. 4, the lower plastic 200 is also provided with a slot, so that the heat conducting member 130 extends into the slot, which is not described in detail.

In a third aspect, embodiments of the present application further provide a single battery. The single battery comprises a cover plate assembly provided by any of the second aspects.

It should be noted that, the single battery provided in this embodiment of the present application includes the cover plate assembly in the second aspect, the connecting piece 120 in at least one of the two pin structures 100 in the cover plate assembly is installed at the bending position of the pin body 110, so as to control the connecting piece 120 to attach to the pin body 110, increase the overcurrent cross-sectional area of the pin structure 100 at the bending position, improve the overcurrent capability, and optimize and even avoid the heating at the bending position, thereby improving the structural performance and the service life of the single battery applying the pin structure 100.

It is noted that the single battery further comprises a battery cell and a shell, the shell is provided with an opening, the battery cell is arranged in the shell, and the cover plate component is buckled with the opening of the shell to seal the battery cell. The cell includes a cell body and a tab integrally derived from the cell body for connecting to the second portion 112 of the pin body 110.

It should be appreciated that the cell body may be formed by folding or winding a strip of material comprising a positive plate, a negative plate, and a separator, wherein the separator separates the positive plate from the negative plate.

In one embodiment, the single battery provided in the embodiments of the present application further includes an electrolyte filled inside the case member.

It is understood that the electrolyte is composed of electrolyte, organic solvent, and additives. The electrolyte is an important material in the single battery, can transport lithium ions and provide power required by the single battery, and is a key component for the single battery to exert energy.

In a fourth aspect, embodiments of the present application provide a battery. The battery comprises a single battery provided in any of the above third aspects.

It should be noted that, the battery provided in the present application includes the single battery in the third aspect, in the single battery, the connecting piece 120 in at least one of the two pin structures 100 is installed at the bending position of the pin body 110, so as to control the connecting piece 120 to attach to the pin body 110, increase the overcurrent cross-sectional area of the pin structure 100 at the bending position, improve the overcurrent capability, so as to optimize and even avoid the heating at the bending position, and further improve the structural performance and the service life of the single battery applying the pin structure 100.

In one embodiment, the battery is a battery module or a battery pack.

The battery module comprises a plurality of single batteries, and the battery module can further comprise an end plate and a side plate, wherein the end plate and the side plate are used for fixing the plurality of single batteries. The battery module may further include a bracket to which the unit cells may be fixed.

The battery pack comprises a plurality of single batteries and a box body, wherein the box body is used for fixing the plurality of single batteries.

It should be noted that the battery pack includes a plurality of unit batteries, and the plurality of batteries are disposed in the case. Wherein, a plurality of battery cells can be installed in the box after forming the battery module. Or, a plurality of single batteries can be directly arranged in the box body, namely, the plurality of single batteries do not need to be grouped, and the plurality of single batteries are fixed by the box body.

In a fifth aspect, embodiments of the present application provide a powered device. The electric equipment comprises a battery provided by any technical scheme in the fourth aspect.

It should be noted that, the electrical device provided in this embodiment of the present application includes the battery in the fourth aspect, in this battery, the connecting piece 120 in at least one of the two pin structures 100 of each single battery is installed at the bending position of the pin body 110, so as to control the connecting piece 120 to attach to the pin body 110, increase the overcurrent cross-sectional area of the pin structure 100 at the bending position, improve the overcurrent capability, so as to optimize and even avoid the heating at the bending position, and further improve the structural performance and the service life of the single battery applying the pin structure 100, and improve the safety performance and the service life of the battery, even the electrical device.

The electric equipment can be power equipment such as an automobile, a ship and the like. Of course, the electric equipment can be set to be other according to the requirement, and detailed description is omitted.

Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the utility model disclosed herein. This application is intended to cover any variations, uses, or adaptations of the utility model following, in general, the principles of the application and including such departures from the present disclosure as come within known or customary practice within the art to which the application pertains. The specification and example embodiments are to be considered exemplary only, with a true scope and spirit of the application being indicated by the following claims. It is to be understood that the present application is not limited to the precise arrangements and instrumentalities shown in the drawings, which have been described above, and that various modifications and changes may be effected without departing from the scope thereof. The scope of protection of the application is limited only by the claims that follow.

Claims (14)

1. The pin structure is characterized by being used for electrically connecting a battery cell in a single battery cell with a pole of the single battery cell; the pin structure comprises a pin body and a connecting piece, wherein the pin body is provided with a bending part, and the connecting piece is arranged at the bending part so as to increase the cross section area of the pin body at the bending part.

2. The pin structure of claim 1, wherein the connector is a U-shaped structure having an opening, a portion of the pin body is disposed within the U-shaped structure from the opening, and a weld is between the connector and the pin body.

3. The pin structure of claim 2, wherein the connector is a metal block and the metal block is provided with a through slot to form the U-shaped structure.

4. The pin structure of claim 3, wherein the connector is the same material as the pin body.

5. The pin structure of any one of claims 1-4, wherein the pin body comprises a first portion for connecting a post and a second portion for connecting a cell, the second portion being connected to the first portion and the second portion mating with the first portion to form an L-shaped structure;

the connecting piece is arranged at the top end of the second part, and one side surface of the connecting piece, which is close to the first part, is contacted with the bottom surface of the first part.

6. The pin structure according to any one of claims 1 to 4, wherein the pin body is provided with a through hole for passing through the pole; the number of the through holes is 2.

7. A cover plate assembly, comprising: two pin structures, the polarities of the two pin structures being opposite, and at least one of the two pin structures being a pin structure as claimed in any of claims 1-6.

8. The cover assembly of claim 7, further comprising a cover body, wherein the pin structure is disposed on one side of the cover body, and wherein a thermally conductive member is disposed between the pin body and the cover body within the pin structure.

9. The cover assembly of claim 8, wherein the thermally conductive member is an L-shaped structure; the heat conducting piece extends from one side surface of the second part of the pin body, which is opposite to the connecting piece, to the top surface of the first part of the pin body.

10. The cover assembly of claim 9, wherein a surface of the cover body facing the side of the pin body is provided with a slot, and the slot extends to the side of the cover body;

at least part of the heat conducting piece is placed in the groove.

11. The cover plate assembly of any one of claims 8-10, wherein the thermally conductive member is an insulating thermally conductive member; or,

an insulating structure is arranged between the heat conducting piece and the cover plate body.

12. A cell comprising a cap assembly according to any one of claims 7-11.

13. A battery comprising the single cell of claim 12.

14. A powered device comprising the battery of claim 13.