CN220341463U - Single battery, battery and electric equipment - Google Patents

Abstract

The utility model relates to the technical field of batteries, and provides a single battery, a battery and electric equipment. This battery cell includes: the shell is provided with a containing cavity, and the containing cavity is provided with an opening; the battery cell is arranged in the accommodating cavity; the cover plate component is positioned at one side of the battery cell, and the cover plate component is buckled with the opening to seal the battery cell; the pin structure is arranged in the accommodating cavity; the pin structure is connected with the cover plate assembly and is connected with the battery core through the soldering lug; the heat conducting piece is arranged in the accommodating cavity, and is arranged on the surface of the pin structure, wherein part of the heat conducting piece is positioned between the pin structure and the shell, and part of the heat conducting piece is positioned between the pin structure and the cover plate component. The single battery can improve the heating condition of the pin structure, improve the safety performance of the single battery and prolong the service life of the single battery.

Description

Single battery, battery and electric equipment

Technical Field

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

Background

The existing power type battery has large multiplying power and strong overcurrent capability. The battery core in the single battery is connected with the cover plate component through the pin structure so as to conduct the battery core with the external structure. It should be noted that the connection state between the battery core and the pin structure can affect the overcurrent capability of the pin structure, and if the connection effect between the battery core and the pin structure is poor, the pin structure can generate serious heat. The heating state of the pin structure can affect the safety performance of the battery, and for example, when the pin structure heats seriously, the thermal runaway phenomenon of the single battery can be induced.

Therefore, how to improve the heating condition at the pin structure, improve the safety performance of the single battery, and prolong the service life of the single battery is a technical problem to be solved.

Disclosure of Invention

The utility model provides a single battery, a battery and electric equipment, wherein the single battery can improve the heating condition of a pin structure, improve the safety performance of the single battery and prolong the service life of the single battery.

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 unit cell comprising:

the shell is provided with a containing cavity, and the containing cavity is provided with an opening;

the battery cell is arranged in the accommodating cavity;

the cover plate component is positioned at one side of the battery cell and is buckled with the opening to seal the battery cell;

the pin structure is arranged in the accommodating cavity; the pin structure is connected with the cover plate assembly and is connected with the battery cell through a soldering lug;

the heat conducting piece is arranged in the accommodating cavity, and is arranged on the surface of the pin structure, wherein part of the heat conducting piece is positioned between the pin structure and the shell, and part of the heat conducting piece is positioned between the pin structure and the cover plate assembly.

According to a second aspect of the present utility model, there is provided a battery, including a single battery provided in any of the above first aspects.

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

It should be noted that, through setting up the heat conduction piece, the battery cell that this application provided can be with the heat transfer of pin structure department to casing and apron body to effectively transfer the heat of pin structure department outside the casing, can promote the security performance of battery cell and prolong battery cell's life; meanwhile, the part of the heat conducting piece, which is arranged at the pin structure, can separate the pin structure from the shell, so that the insulation effect can be improved, short circuit between the battery cell and the shell is avoided, and the safety performance of the single battery can be improved.

Moreover, the single battery provided by the application adopts the soldering lug, so that the connection speed of the battery cell and the pin structure can be increased, the connection effect of the battery cell and the pin structure is improved, the battery cell is effectively prevented from being welded or damaged due to long-time welding, and the preparation yield and the structural performance of the single battery are improved; moreover, because the welding efficiency can be promoted to the welding-aid piece, so this structure sets up still with the preparation efficiency who accelerates single battery, and then can reduce manufacturing cost. Meanwhile, the connection speed of the pin structure and the battery cell is improved under the holding of the soldering lug, so that the quantity of metal scraps generated at the connection position of the pin structure and the battery cell is reduced, the influence of the metal scraps on the battery cell can be weakened, the structural performance of the single battery is further improved, and the service life of the single battery is prolonged.

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 single battery provided in an embodiment of the present application;

FIG. 2 is a schematic explosion diagram of the first type of battery cell of FIG. 1;

FIG. 3 is a schematic diagram of a second explosion of the battery cell of FIG. 1;

fig. 4 is an enlarged schematic view of an inner lead structure of a single battery according to an embodiment of the present disclosure;

fig. 5 is an enlarged schematic view of a soldering tab in a single battery according to an embodiment of the present application.

The reference numerals are explained as follows:

100. a housing; 200. a battery cell; 210. a cell body; 220. a tab portion; 300. a cover plate assembly; 310. a cover plate body; 320. a pole; 400. a pin structure; 410. a first portion; 411. penetrating holes; 420. a second portion; 421. a body region; 422. a welding area; 4221. a first solder subregion; 4222. a second solder subregion; 500. soldering lug; 510. chamfering; 600. a heat conductive member; 700. an insulating film.

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 battery cell. Fig. 1 is a schematic structural diagram of a single battery provided in an embodiment of the present application; FIG. 2 is a schematic explosion diagram of the first type of battery cell of FIG. 1; FIG. 3 is a schematic diagram of a second explosion of the battery cell of FIG. 1; fig. 4 is an enlarged schematic view of an inner lead structure of a single battery according to an embodiment of the present disclosure; fig. 5 is an enlarged schematic view of a soldering tab in a single battery according to an embodiment of the present application.

Referring to the structures shown in fig. 1 to 5, the battery cell provided in the embodiment of the present application includes: the battery pack comprises a shell 100, a battery cell 200, a cover plate assembly 300, a pin structure 400 and a heat conducting piece 600, wherein the shell 100 is provided with a containing cavity, and the containing cavity is provided with an opening; the battery cell 200 is arranged in the accommodating cavity; the cover plate assembly 300 is positioned at one side of the battery cell 200, and the cover plate assembly 300 is buckled with the opening to seal the battery cell 200; the pin structure 400 is placed in the receiving cavity; the pin structure 400 is connected with the cover plate assembly 300, and the pin structure 400 is connected with the battery cell 200 through the soldering lug 500; the heat conducting member 600 is disposed in the accommodating cavity, and the heat conducting member 600 is disposed on the surface of the pin structure 400, wherein a portion of the heat conducting member 600 is located between the pin structure 400 and the housing 100, and a portion of the heat conducting member 600 is located between the pin structure 400 and the cover assembly 300.

As shown in fig. 1 to 4, in the unit cell provided in the embodiment of the present application, a case 100 has a receiving cavity for providing a receiving space; the battery cell 200 and the pin structure 400 are arranged in the accommodating cavity of the shell 100, the cover plate assembly 300 is buckled with the opening of the accommodating cavity so as to seal the battery cell 200 in a space formed by the cover plate body 310 and the shell 100, so that the battery cell 200 can be prevented from being impacted by external force, and the battery cell 200 can be protected; the cell 200 is the smallest unit capable of performing an electrochemical reaction such as charge/discharge; the lead structure 400 connects the battery cell 200 and the cover assembly 300 for electrical conduction.

It should be noted that, by arranging the heat conducting member 600, the single battery provided in the embodiment of the present application can transfer the heat at the pin structure 400 to the housing 100 and the cover plate body 310, so as to effectively transfer the heat at the pin structure 400 to the outside of the housing 100, thereby improving the safety performance of the single battery and prolonging the service life of the single battery; meanwhile, the portion of the heat conducting member 600 disposed at the pin structure 400 can separate the pin structure 400 from the housing 100, so that the insulation effect can be improved, and the short circuit between the battery cell 200 and the housing 100 can be avoided, thereby improving the safety performance of the battery cell.

Meanwhile, the single battery provided by the embodiment of the application adopts the soldering lug 500, so that the connection speed of the battery cell 200 and the pin structure 400 can be increased, the connection effect of the battery cell 200 and the pin structure 400 is improved, the battery cell 200 is effectively prevented from being welded or damaged due to long-time welding, and the preparation yield and the structural performance of the single battery are improved; moreover, since the welding efficiency of the welding assisting tab 500 can be improved, the structure is provided to further accelerate the manufacturing efficiency of the single battery, and thus the manufacturing cost can be reduced. Meanwhile, since the connection speed of the pin structure 400 and the battery cell 200 is improved under the holding of the soldering tab 500, the quantity of metal scraps generated at the connection position of the pin structure 400 and the battery cell 200 is reduced, and the influence of the metal scraps on the battery cell 200 can be weakened, so that the structural performance of the single battery is further improved, and the service life of the single battery is prolonged.

In one embodiment, please continue to refer to the structure shown in fig. 1-3, the cover assembly 300 includes a cover body 310 and a post 320, the post 320 penetrates from the side of the cover body 310 facing away from the battery cell 200 to the side of the cover body 310 facing toward the battery cell 200; the pin structure 400 is disposed on one side of the cover body 310 facing the battery cell 200, and the pin structure 400 connects the battery cell 200 and the pole 320; a portion of the heat conductive member 600 is disposed between the lead structure 400 and the cover body 310.

It should be noted that, the heat conducting member 600 is used for reducing the temperature rise degree of the pin body, and the temperature can be further led out through the heat conducting member 600, so as to solve the problem of large temperature rise at the pin structure 400.

It should be appreciated that the unit cell has two polar poles 320, and the polar poles 320 of different polarities are mounted to different lead structures 400. In addition, it should be noted that the poles 320 with different polarities may be located on the same cover assembly 300, or may be located on two cover assemblies 300 with different polarities, which is not described in detail.

In one embodiment, with continued reference to the structure shown in fig. 1-4, the pin structure 400 includes a first portion 410 for connecting the terminal 320 and a second portion 420 for connecting the battery cell 200; the second portion 420 is bent with respect to the first portion 410 to form the pin structure 400 into an L-shaped structure;

the heat conductive member 600 has an L-shaped structure; the heat conductive member 600 extends from the outer surface of the second portion 420 to a side surface of the first portion 410 facing the cap body 310.

It should be appreciated that in the pin structure 400 of the L-shaped structure, the area surrounded by the L-shape is referred to as the "inner side", and correspondingly, the area outside the L-shape is referred to as the "outer side". "

It should be noted that, the second portion 420 is bent relative to the first portion 410, and a bend is formed at a connection portion between the first portion 410 and the second portion 420, and when the structure of the heat conducting member 600 is adapted to the shape of the pin structure 400 and is also an L-shaped structure, the heat conducting member 600 can isolate the bent portion of the pin structure 400 from the housing 100, so as to improve the insulation effect of the battery cell 200.

Meanwhile, the heat conductive member 600 can effectively transfer heat of the battery pins at the bent portions to the outside of the case 100, so as to enhance the overall safety of the battery cells. Specifically, when more heat is generated at the second portion 420 and the bending portion connected to the battery cell 200, the portion of the heat conducting member 600 disposed at the second portion 420 and the bending surface can conduct the heat to the portion of the heat conducting member 600 disposed at the outer surface of the first portion 410, so that the heat of the portion is transferred to the environment other than the single battery through the cover plate body 310, and the overall safety of the single battery is enhanced.

Referring to the structure shown in fig. 1 to 4, in one embodiment, two through holes 411 are formed in the first portion 410 to correspondingly mount two poles 320, and specifically, one pole 320 is mounted in each through hole 411. It should be appreciated that the two posts 320 that are threaded on each pin structure 400 have the same polarity.

It should be noted that, the structural design in this embodiment can increase the welding area and improve the overcurrent capability of the battery, so as to improve the structural performance of the single battery applying the pin structure 400.

Of course, only one pole 320 may be disposed on the first portion 410 of each pin structure 400, so as to reduce the size of the first portion 410 and improve the space utilization in the single battery, which is not described in detail.

In one embodiment, referring to the structure shown in fig. 2 to 4, the second portion 420 includes a body area 421 and a bonding area 422, the body area 421 is connected to the first portion 410, and the bonding area 422 is bent towards the inner side of the L-shaped structure with respect to the body area 421; the bonding region 422 includes a first bonding region 4221 and a second bonding region 4222, the first bonding region 4221 and the second bonding region 4222 are located on the same side of the body region 421, and the first bonding region 4221 and the second bonding region 4222 extend from opposite sides of the body region 421 to form a U-shaped structure with the body region 421.

It should be noted that, the welding area 422 is bent relative to the main body area 421, so that the connection direction between the second portion 420 and the battery cell 200 can be converted, and the positions of the battery cell 200 and the welding area 422 are reasonably planned to improve the welding effect of the battery cell 200 and the welding area 422. Moreover, the welding area is increased, the overcurrent capacity can be improved, and the structural performance of the single battery is enhanced.

With continued reference to the structure shown in fig. 2, the bonding area 422 is specifically divided into two bonding areas, namely a first bonding area 4221 and a second bonding area 4222, where the first bonding area 4221 may be connected to one of the cells 200 in the single cell, the second bonding area 4222 may be connected to another of the cells 200 in the single cell, and the first bonding area 4221 and the second bonding area 4222 in the same bonding area 422 are connected to the same polarity portion of each of the cells 200.

It should be noted that, the structure in this embodiment is configured to separate the welding positions of the two battery cells 200 and the same pin structure 400, so as to reduce the welding difficulty, improve the welding effect, and reduce the possibility that the battery cells 200 are welded through. Meanwhile, the welding area can be increased through the structural arrangement, so that the overcurrent capacity is improved, and the structural performance of the single battery is enhanced.

It is noted that at least one of the first solder sub-area 4221 and the second solder sub-area 4222 is connected to the electric core 200 through the soldering tab 500, which is not described herein.

In a particular embodiment, first and second bond pads 4221, 4222 within bond pad 422 are parallel or approximately parallel such that first and second bond pads 4221, 4222 connect to corresponding die 200.

In one embodiment, with continued reference to the structure shown in fig. 2-4, the body region 421 is provided with an elongated slot.

It should be noted that, the long groove can meet the requirement of the welding head for welding the tab portion 220 and the welding area 422, so as to avoid interference and improve the welding effect between the two.

It is noted that the heat conductive member 600 only covers a portion of the main body area 421, avoiding the long groove structure, so as to avoid interfering with the welding operation of the welding head.

In one embodiment, as shown in fig. 2 and 3, the cell 200 includes a cell body 210 and a tab portion 220 that leads from the cell body 210.

In one particular embodiment, the cell 200 includes two tab portions 220, the two tab portions 220 leading from opposite sides of the cell body 210 and having opposite polarities. It should be appreciated that of the two tab portions 220 within the same cell 200, one tab portion 220 has a positive polarity and the other tab portion 220 has a negative polarity.

Illustratively, for the same pin structure 400, the pin structure 400 is within: the first solder segment 4221 connects to the positive polarity tab portion 220 of one cell 200 and the second solder segment 4222 connects to the positive polarity tab portion 220 of the other cell 200.

Of course, the first and second solder sub-areas 4221 and 4222 in the same solder area 422 may also connect the tab portions 220 with negative polarity in the two battery cells 200, which will not be described in detail. In general, the polarity of the tab portions 220 of two cells 200 connected to the same pin structure 400 is the same.

For one cell 200, two tab portions 220 within each cell 200 are connected to different pin structures 400, specifically, a tab portion 220 of positive polarity is connected to one pin structure 400 and a tab portion 220 of negative polarity is connected to the other pin structure 400.

Notably, the cell body 210 can be formed by folding or winding a strip of material that includes a pole piece that is split into a negative pole piece and a positive pole piece, and a separator that separates the negative pole piece and the positive pole piece. The pole piece comprises a current collector and an active material coating layer arranged on at least one side of the current collector, the active material coating layer covers part of the current collector, the current collector which is not covered by the active material coating layer forms a pole lug along the leading-out direction of the pole lug part 220 from the battery core body 210, and the pole lug part 220 is formed after the pole lugs of the multi-layer pole piece are overlapped and folded.

It should be appreciated that the tab portion 220 formed by the positive pole piece inner current collector has a positive polarity and the tab portion 220 formed by the negative pole piece inner current collector has a negative polarity; positive polarity tab portion 220 is connected to pole 320 via pin structure 400 to have positive polarity; the negative polarity tab 220 is connected to the post 320 by the lead structure 400 to have a negative polarity.

In one embodiment, the tab is an uncut full tab. It should be understood that, with continued reference to the structure shown in fig. 2-4, "full tab" refers to an uncut tab, i.e., the tab has the same dimension as the pole piece in the width direction of the cell body 210. It should be understood that "the width direction of the cell body 210" herein refers to the direction in which the cell 200 is directed toward the cover assembly 300; the leading-out direction of the two pole lugs 220 from the battery cell body 210 is parallel to the length direction of the battery cell 200; the arrangement direction of the two cells 200 is parallel to the thickness direction of the cells 200.

It should be noted that, the full tab design can reduce the local current density, and can effectively reduce the heat production efficiency of the battery. Meanwhile, when the tab is not cut and forms a full tab structure, the tab can separate the second portion 420, the battery cell body 210 and the housing 100, so that heat and metal scraps generated in the ultrasonic welding process and the second portion 420 process are prevented from affecting the diaphragm of the battery cell body 210, and the structural performance of the single battery can be ensured.

In one embodiment, with continued reference to the structure shown in fig. 2 and 3, the tab portion 220 is sandwiched between the lead structure 400 and the soldering lug 500; tab portion 220, lead structure 400, and tab 500 are ultrasonically welded.

It should be noted that, the pin structure 400 and the tab portion 220 of the battery cell 200 are connected in an ultrasonic welding manner, and the structure can enhance the welding strength between the pin structure 400 and the battery cell 200, so as to prevent the tab residue from overflowing out and causing cold solder during the ultrasonic welding process, and further improve the overcurrent capability.

Meanwhile, since the connection speed of the pin structure 400 and the battery cell 200 is improved under the holding of the soldering tab 500, the quantity of metal scraps generated at the connection position of the pin structure 400 and the battery cell 200 is reduced, and the influence of the metal scraps on the battery cell 200 is further weakened, so that the structural performance of the single battery is improved, and the service life of the single battery is prolonged.

In one embodiment, the tab 500 is the same material as the tab portion 220.

It should be noted that, when the two materials are the same, the welding difficulty of the soldering lug 500 and the tab ear 220 can be reduced, and the connection strength of the soldering lug 500 and the tab ear 220 after welding can be improved, so that the tab ear 220 can be stably arranged on the second portion 420 in the use process, and the structural stability and the service life of the single battery can be improved.

Of course, the materials of the soldering lug 500 and the tab ear 220 may be different, for example, the soldering lug 500 may be formed by using a material with better melting effect, so as to optimize the soldering effect of the soldering lug 500, which is not described in detail.

In one embodiment, referring to the structure shown in FIG. 5, the edges of the tab 500 are provided with a chamfer 510. It should be appreciated that the chamfer 510 may be formed by cutting the tab 500, and illustratively, as shown in fig. 5, the inner portion of the dashed box may be removed during the formation of the chamfer 510.

It should be noted that, in the vibration welding process, the welding assisting tab 500 may damage the tab portion 220, so as to improve the structural performance of the single battery and prolong the service life of the single battery.

With continued reference to the structure shown in fig. 5, the chamfer 510 may be a bevel, or may be an arcuate surface protruding outward, to further reduce the risk of the tab 500 scratching the tab portion 220.

In one embodiment, with continued reference to the structure shown in fig. 5, the soldering tab 500 includes at least two soldering flux layers stacked together, and the at least two soldering flux layers are formed by bending a soldering flux plate.

It should be noted that, the structural arrangement of the multi-layer soldering lug 500 can enhance the thickness of the soldering lug 500 to enhance the soldering effect; the multilayer helps the welding layer by the structure setting of same structure lamination, can avoid the multilayer to help the welding layer to take place the drunkenness in the welding process to guarantee multilayer structure's stability, promote the welding effect.

With continued reference to the structure shown in fig. 5, each tab portion 220 is connected with the pin structure 400 through at least two soldering tabs 500, so as to improve the soldering effect between the tab portion 220 and the pin structure 400, and improve the connection strength between the battery cell 200 and the pin structure 400, thereby improving the structural performance of the single battery and prolonging the service life of the single battery.

Specifically, compared to the structural design of the same soldering tab 500, the structural design of the two soldering tabs 500 can make it possible to adjust the state of the tab portion 220 when the tab portion 220 is soldered with different soldering tabs 500, so as to optimize the soldering state of the tab portion 220 and the lead structure 400.

In one embodiment, please continue to refer to the structure shown in fig. 2, the single battery provided in the embodiment of the present application further includes an insulating film 700, and the insulating film 700 is wrapped on the outer surface of the battery cell 200; the insulating film 700 has an opening at least at a side facing the cap plate assembly 300, and the insulating film 700 contacts the cap plate assembly 300. It should be understood that the contact between the insulating film 700 and the cap plate assembly 300 may be direct contact or indirect contact, "direct contact" meaning that there are no other structural members therebetween, and "indirect contact" meaning that there are other structural members therebetween and additional contact is made with other structural members.

It should be noted that, the insulating film 700 may also be referred to as a mylar film, and is generally made of PP (polypropylene) material, which has good surface flatness, transparency, mechanical flexibility and insulating properties, and ensures the insulating and sealing properties of the single battery.

With continued reference to the structure shown in fig. 2, the insulating film 700 is encapsulated outside the cover plate assembly 300 and the battery cell 200, so as to realize the whole package of the battery cell 200, play a role in packaging the battery cell 200, ensure the insulating effect of the battery cell 200, and avoid the situation that the cover plate body 310 or other parts are corroded by the leakage of the battery cell 200.

When the structure of the insulating film 700 is specifically provided, the insulating film 700 may be provided with an opening only on one side facing the cover plate assembly 300, or the insulating film 700 may be provided with an opening on one side facing the cover plate assembly 300, and the insulating film 700 is also provided with an opening on the other side facing away from the cover plate assembly 300, which may be specifically set according to the requirement, and will not be described herein.

It is noted that the single battery in the embodiment of the present application may be used for a battery requiring a large multiplying power due to the strong overcurrent capability compared with other structures.

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

It should be noted that, in the battery provided in this embodiment of the present application, the single battery may transfer the heat at the pin structure 400 to the housing 100 and the cover plate body 310 by providing the heat conducting member 600, so as to effectively transfer the heat at the pin structure 400 to the outside of the housing 100, thereby improving the safety performance of the single battery and prolonging the service life of the single battery; meanwhile, the portion of the heat conducting member 600 disposed at the pin structure 400 can separate the pin structure 400 from the housing 100, so that the insulation effect can be improved, and the short circuit between the battery cell 200 and the housing 100 can be avoided, thereby improving the safety performance of the battery cell.

Meanwhile, in the battery provided by the embodiment of the application, the auxiliary welding tab 500 is adopted in the single battery, so that the connection speed of the battery cell 200 and the pin structure 400 can be increased, the connection effect of the battery cell 200 and the pin structure 400 is improved, the battery cell 200 is effectively prevented from being welded through or damaged due to long-time welding, and the preparation yield and the structural performance of the single battery are improved; moreover, since the welding efficiency of the welding assisting tab 500 can be improved, the structure is provided to further accelerate the manufacturing efficiency of the single battery, and thus the manufacturing cost can be reduced. Meanwhile, since the connection speed of the pin structure 400 and the battery cell 200 is improved under the holding of the soldering tab 500, the quantity of metal scraps generated at the connection position of the pin structure 400 and the battery cell 200 is reduced, and the influence of the metal scraps on the battery cell 200 can be weakened, so that the structural performance of the single battery is further improved, and the service life of the single battery is prolonged.

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 third aspect, an embodiment of the present application provides an electrical device. The electric equipment comprises a battery as provided in any of the above second aspects.

It should be noted that, in the electric device provided in this embodiment of the present application, the single battery may transfer the heat at the pin structure 400 to the housing 100 and the cover plate body 310 by setting the heat conducting member 600, so as to effectively transfer the heat at the pin structure 400 to the outside of the housing 100, thereby improving the safety performance of the single battery and prolonging the service life of the single battery; meanwhile, the portion of the heat conducting member 600 disposed at the pin structure 400 can separate the pin structure 400 from the housing 100, so that the insulation effect can be improved, and the short circuit between the battery cell 200 and the housing 100 can be avoided, thereby improving the safety performance of the battery cell.

Meanwhile, in the electric equipment provided by the embodiment of the application, the auxiliary welding tab 500 is adopted by the single battery, so that the connection speed of the battery cell 200 and the pin structure 400 can be increased, the connection effect of the battery cell 200 and the pin structure 400 is improved, the battery cell 200 is effectively prevented from being welded or damaged due to long-time welding, and the preparation yield and the structural performance of the single battery are improved; moreover, since the welding efficiency of the welding assisting tab 500 can be improved, the structure is provided to further accelerate the manufacturing efficiency of the single battery, and thus the manufacturing cost can be reduced. Meanwhile, since the connection speed of the pin structure 400 and the battery cell 200 is improved under the holding of the soldering tab 500, the quantity of metal scraps generated at the connection position of the pin structure 400 and the battery cell 200 is reduced, and the influence of the metal scraps on the battery cell 200 can be weakened, so that the structural performance of the single battery is further improved, and the service life of the single battery is prolonged.

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 (12)

1. A single cell, characterized by comprising:

the shell is provided with a containing cavity, and the containing cavity is provided with an opening;

the battery cell is arranged in the accommodating cavity;

the cover plate component is positioned at one side of the battery cell and is buckled with the opening to seal the battery cell;

the pin structure is arranged in the accommodating cavity; the pin structure is connected with the cover plate assembly and is connected with the battery cell through a soldering lug;

the heat conducting piece is arranged in the accommodating cavity, and is arranged on the surface of the pin structure, wherein part of the heat conducting piece is positioned between the pin structure and the shell, and part of the heat conducting piece is positioned between the pin structure and the cover plate assembly.

2. The cell of claim 1, wherein the cover assembly comprises a cover body and a post extending from a side of the cover body facing away from the cell to a side of the cover body facing toward the cell; the pin structure is arranged on one side, facing the battery cell, of the cover plate body, and is connected with the battery cell and the pole;

and part of the heat conducting piece is arranged between the pin structure and the cover plate body.

3. The cell of claim 2, wherein the pin structure comprises a first portion for connecting a post and a second portion for connecting a cell; the second part is bent relative to the first part so as to form the pin structure into an L-shaped structure;

the heat conducting piece is of an L-shaped structure; the heat conducting piece extends from the outer surface of the second part to the surface of one side of the first part, which faces the cover plate body.

4. The cell of claim 3, wherein the second portion comprises a body region and a weld region, the body region connecting the first portion, the weld region being folded inwardly of the L-shaped structure relative to the body region; the bond region includes a first bond region and a second bond region, the first and second bond regions being on the same side of the body region, and the first and second bond regions extending from opposite sides of the body region to form a U-shaped structure with the body region.

5. The cell of any one of claims 1-4, wherein the cell comprises a cell body and a tab portion leading from the cell body; the tab portion comprises a plurality of layers of tabs, and the tabs are all tabs which are not cut.

6. The cell of claim 5, wherein the tab portion is sandwiched between the lead structure and the tab; the tab portion, the pin structure and the soldering lug are welded by ultrasonic waves.

7. The cell of claim 6, wherein the tab is the same material as the tab portion.

8. The cell according to any one of claims 1 to 4, wherein the edges of the soldering lug are provided with a chamfer.

9. The cell of claim 8, wherein the soldering tab comprises at least two soldering flux layers arranged in a stacked manner, and wherein at least two of the soldering flux layers are formed by bending a soldering flux plate.

10. The battery cell of any one of claims 1-4, further comprising an insulating film wrapped around an outer surface of the cell; the insulating film has an opening at least on a side facing the cap plate assembly, and the insulating film is in contact with the cap plate assembly.

11. A battery comprising the single cell of any one of claims 1-10.

12. A powered device comprising the battery of claim 11.