CN220306463U - Tab pin and battery - Google Patents

Abstract

The utility model relates to the technical field of batteries, in particular to a tab pin and a battery. The lug pin in this battery includes pin main part and two lug connection pieces, has offered on the pin main part and has dodged the hole, dodges the pore wall in hole both sides and is parallel and level mutually with the inside wall of two lug connection pieces respectively, and welded joint can stretch into dodge in the hole and the butt on the lug connection piece with dodge the pore wall in hole to with the electrode lug be close to the one end welded fastening of pin main part on the lug connection piece from the lug connection piece, need not the size of extra extension lug connection piece, practice thrift the installation space of lug connection piece, improve the specific energy density of battery. In addition, the hole wall of the avoidance hole is flush with the inner side wall of the tab connecting sheet, so that the tab connecting sheet and the electrode tab which are welded and fixed are convenient to bend.

Description

Tab pin and battery

Technical Field

The utility model relates to the technical field of batteries, in particular to a tab pin and a battery.

Background

With the continuous development of battery technology, in order to meet the market demands, the energy storage capacity and the charge and discharge power of the battery are designed to be larger and larger, and the battery often needs to have 400-800A of current and even 1000-1500A of current flowing inside. The tab pin in the battery is easy to generate heat when the current flows through the battery, and the specific structure of the tab pin is required to be innovated in order to ensure the normal operation and the use safety of the battery.

In prior art, take CN219017866U as an example, the tab pin in this application includes a pin body and two tab connection pieces connected to opposite sides of the pin body, and it connects the pin body and the electrode pole and welds the electrode pole on the tab connection piece, so as to realize the electrical connection between the electrode pole and the electrode pole. In the actual welding process of the electrode tab and the tab connection sheet, the applicant notes that: because the function requirement of the welding joint in the welding jig is that the welding joint is large in size, a certain accommodating space is needed to be provided for the welding joint when welding is carried out, and the welding joint cannot directly abut against the part connected with the pin main body in the tab connecting sheet, so that the electrode tab cannot be welded from the part connected with the pin main body in the tab connecting sheet, and the extension length of the tab connecting sheet is forced to be increased to ensure the welding effect of the electrode tab and the tab connecting sheet. However, the mode of increasing the extension length of the tab connecting sheet further increases the size of the tab pin, improves the accommodating space required by the tab pin, and reduces the specific energy density of the battery. In addition, when electrode tab and tab connection piece with welded fastening together buckle, because the inside pin main part of tab connection piece blocks, the pin main part is equivalent to the strengthening rib structure, is inconvenient to buckle electrode tab and tab connection piece with welded fastening together, needs additionally to exert great force to overturn for improving its effect of buckling, and additionally exerts great force and leads to accomplishing tab connection piece and electrode tab after buckling easily and appear cracked problem.

Therefore, there is a need for an utility model of tab leads and battery to solve the above problems.

Disclosure of Invention

The utility model aims to provide a tab pin and a battery, which realize the accurate welding of an electrode tab and a tab connecting sheet, reduce the extension size of the tab connecting sheet and improve the specific energy density of the battery.

To achieve the purpose, the utility model adopts the following technical scheme:

lug pin includes:

a pin body; and

the electrode pin comprises a pin body, and is characterized in that two lug connecting pieces are arranged on the pin body, a avoidance hole is formed in the pin body, hole walls on two sides of the avoidance hole are respectively flush with the inner side walls of the lug connecting pieces, and a welding joint can extend into the avoidance hole and abut against the lug connecting pieces and the hole walls of the avoidance hole so as to weld and fix electrode lugs on the lug connecting pieces from one ends, close to the pin body, of the lug connecting pieces.

As a preferred solution, the tab connection piece includes:

the welding area is welded and fixed with the electrode lug; and

and the bending area is arranged at one end of the welding area and is connected with the pin main body, and the thickness of the bending area is smaller than that of the welding area.

As a preferable scheme, the distance from one end close to the pin main body to one end of the tab connecting sheet far away from the pin main body is 3 mm-5 mm.

Preferably, the pin body includes:

a first pin body portion electrically connected to the electrode post; and

the second pin main body part is bent and arranged at a first preset angle with the first pin main body part, and the lug connecting pieces are arranged on two opposite side edges of the second pin main body part.

As a preferable scheme, a pole butt joint hole is formed in the first pin main body part, and the pole butt joint hole is fixedly in butt joint with the electrode pole.

Preferably, the first preset angle is 90 °.

Preferably, the thickness of the first pin body part is 1mm to 2mm, and the thickness of the second pin body part is 0.4mm to 1mm.

Preferably, the tab connection piece extends horizontally in a direction away from or near the first pin main body portion.

Preferably, the first pin body portion and the second pin body portion are provided with reinforcing ribs on the inner sides of the bending regions.

The battery comprises a battery cover plate, a battery shell, a battery cell and the electrode lug pins, and is characterized in that the electrode lug is led out from the battery cell, the electrode pole is led out from the battery cover plate, one end of the electrode lug pin is electrically connected and fixed with the electrode pole on the battery cover plate, the other end of the electrode lug pin is electrically connected and fixed with the electrode lug, and the battery cell and the electrode lug pins are all accommodated in an accommodating space formed by the battery shell and the battery cover plate.

The utility model has the beneficial effects that:

according to the tab pin provided by the utility model, the avoidance hole is formed in the pin main body, so that the accommodating space is provided for the welding joint, the welding joint can be enabled to be abutted against the wall of the tab connecting piece and the avoidance hole, and the electrode pole piece is welded and fixed on the tab connecting piece from one end of the tab connecting piece, which is close to the pin main body, without additionally extending the tab connecting piece, the size of the tab connecting piece is reduced, the installation space of the tab connecting piece is further saved, the integral installation space of the tab pin is saved, and the specific energy density of a battery is improved. And because the pore wall of dodging the hole is parallel and level mutually with the inside wall of utmost point ear connection piece, when electrode plate and the utmost point ear connection piece that will accomplish welded fastening are buckled to the inboard of utmost point ear connection piece, do not have the pin main part in the region of buckling of utmost point ear connection piece and block the bending of utmost point ear connection piece, be convenient for buckle electrode utmost point ear and utmost point ear connection piece that welded fastening together, need not to weld electrode utmost point ear and utmost point ear connection piece that is fixed together and additionally exert great power, improve the effect of buckling of utmost point ear connection piece, and then improve the protection of electrode utmost point ear and utmost point ear connection piece that welded fastening together. In addition, through seting up in the pin main part and dodging the hole, not only can further reduce the weight of pin main part, practice thrift manufacturing cost, but also can reduce the electric current area that overflows of pin main part, and then reduce the biggest overflow value of electric current of pin main part, provide overcurrent protection for the pin main part, avoid the too big direct damage battery of electric current of flowing through the pin main part.

The utility model further provides a battery, by applying the tab pin, the electrode pole piece is welded and fixed on the tab connecting piece from one end of the tab connecting piece, which is close to the pin main body, without additionally extending the tab connecting piece, so that the size of the tab connecting piece is reduced, the installation space of the tab connecting piece is further saved, the overall installation space of the tab pin is saved, and the specific energy density of the battery is improved. And electrode tab and tab connection piece that still be convenient for weld fastening together buckle, improve the bending effect of tab connection piece, and then improve the protection to the battery. In addition, through seting up in the pin main part and dodging the hole, not only can further reduce the weight of pin main part, practice thrift manufacturing cost, but also can reduce the electric current area that overflows of pin main part, and then reduce the biggest overflow value of electric current of pin main part, provide overcurrent protection for the pin main part, avoid the too big direct damage battery of electric current of flowing through the pin main part.

Drawings

Fig. 1 is a schematic structural diagram of a tab pin according to an embodiment of the present utility model;

fig. 2 is a schematic structural view of a battery according to an embodiment of the present utility model.

In the figure:

100. a tab pin;

110. a pin body; 111. a first pin body portion; 1111. a pole butt joint hole; 1112. a cover plate positioning hole; 112. a second pin body portion; 113. avoidance holes; 120. a tab connection piece;

200. a battery case;

300. a battery cover plate;

310. an electrode post; 320. a cover plate main body; 330. a liquid injection hole; 340. explosion-proof hole.

Detailed Description

In order to make the technical problems solved, the technical scheme adopted and the technical effects achieved by the utility model more clear, the technical scheme of the utility model is further described below by a specific embodiment in combination with the attached drawings.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In the present utility model, unless expressly stated or limited otherwise, a first feature "above" or "below" a second feature may include both the first and second features being in direct contact, as well as the first and second features not being in direct contact but being in contact with each other through additional features therebetween. Moreover, a first feature being "above," "over" and "on" a second feature includes the first feature being directly above and obliquely above the second feature, or simply indicating that the first feature is higher in level than the second feature. The first feature being "under", "below" and "beneath" the second feature includes the first feature being directly under and obliquely below the second feature, or simply means that the first feature is less level than the second feature.

In the description of the present embodiment, the terms "upper", "lower", "left", "right", and the like are orientation or positional relationships based on those shown in the drawings, merely for convenience of description and simplicity of operation, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the utility model. Furthermore, the terms "first," "second," and the like, are used merely for distinguishing between descriptions and not for distinguishing between them.

Since the tab pin 100 in the battery is easy to generate heat when a large current flows, the specific structure of the tab pin 100 needs to be innovated in order to ensure the normal operation and the safe use of the battery.

In prior art, take CN219017866U as an example, the tab pin in this application includes a pin body and two tab connection pieces connected to opposite sides of the pin body, and it connects the pin body and the electrode pole and welds the electrode pole on the tab connection piece, so as to realize the electrical connection between the electrode pole and the electrode pole. In the actual welding process of the electrode tab and the tab connection sheet, the applicant notes that: because the function requirement of the welding joint in the welding jig is that the welding joint is large in size, a certain accommodating space is needed to be provided for the welding joint when welding is carried out, and the welding joint cannot directly abut against the part connected with the pin main body in the tab connecting sheet, so that the electrode tab cannot be welded from the part connected with the pin main body in the tab connecting sheet, and the extension length of the tab connecting sheet is forced to be increased to ensure the welding effect of the electrode tab and the tab connecting sheet. However, the mode of increasing the extension length of the tab connecting sheet further increases the size of the tab pin, improves the accommodating space required by the tab pin, and reduces the specific energy density of the battery. In addition, when electrode tab and tab connection piece with welded fastening together buckle, because the terminal body of tab connection piece inboard blocks, be inconvenient for buckling electrode tab and tab connection piece with welded fastening together, need additionally exert great force to overturn for improving its effect of buckling, additionally exert great force and lead to the tab connection piece after accomplishing buckling and the cracked problem of electrode tab easily.

In order to solve the above-mentioned problems, as shown in fig. 1 and 2, an embodiment of the present utility model provides a tab pin 100. The tab pin 100 comprises a pin main body 110 and two tab connecting pieces 120, wherein an avoidance hole 113 is formed in the pin main body 110, hole walls at two sides of the avoidance hole 113 are respectively flush with inner side walls of the two tab connecting pieces 120, and a welding joint can extend into the avoidance hole 113 and abut against the tab connecting pieces 120 and the hole walls of the avoidance hole 113 so as to weld and fix electrode tabs on the tab connecting pieces 120 from one end, close to the pin main body 110, of the tab connecting pieces 120.

This tab pin 100 dodges hole 113 through seting up on pin main part 110, provide accommodation space for welded joint, so as to guarantee that welded joint can the butt on tab connection piece 120 with dodge the pore wall in hole 113, and then with the electrode slice follow tab connection piece 120 be close to pin main part 110's one end welded fastening on tab connection piece 120, need not additionally to extend tab connection piece 120, reduce tab connection piece 120's size, and then practice thrift tab connection piece 120's installation space, practice thrift tab pin 100 holistic installation space, improve the specific energy density of battery. Moreover, because the hole wall of the avoidance hole 113 is flush with the inner side wall of the tab connecting sheet 120, when the electrode pole piece and the tab connecting sheet 120 which are welded and fixed are bent towards the inner side of the tab connecting sheet 120, the pin main body 110 does not exist in the bending area of the tab connecting sheet 120 to block the bending of the tab connecting sheet 120, so that the electrode tab and the tab connecting sheet 120 which are welded and fixed together are conveniently bent, the electrode tab and the tab connecting sheet 120 which are welded and fixed together do not need to be additionally applied with larger force, the bending effect of the tab connecting sheet 120 is improved, and the protection of the electrode tab and the tab connecting sheet 120 which are welded and fixed together is improved. In addition, through offer dodging hole 113 on pin main part 110, not only can further reduce the weight of pin main part 110, practice thrift manufacturing cost, but also can reduce the electric current area of passing through of pin main part 110, and then reduce the biggest excessive current value of electric current of pin main part 110, provide overcurrent protection for pin main part 110, avoid the too big direct damage battery of electric current that flows through pin main part 110.

In this embodiment, two tab connection pieces 120 are respectively disposed on two opposite sides of the pin body 110, the pin body 110 is electrically connected to the electrode post 310, and both tab connection pieces 120 are electrically connected to the electrode tabs. And the electrode tab connecting sheet 120 and the electrode tab are welded and fixed in an ultrasonic welding mode, and an included angle between the side wall of the electrode tab connecting sheet 120 and the side wall of the pin main body 110 is 90 degrees, so that the welding and fixing of the electrode tab and the electrode tab connecting sheet 120 are facilitated. In addition, the avoidance hole 113 in the embodiment is a square hole, and two side walls of the square hole are respectively flush with the inner side walls of the two tab connection pieces 120. In other embodiments, the avoidance hole 113 may be other shaped holes, which only needs to ensure that the hole walls on two sides of the avoidance hole 113 are flush with the inner side walls of the tab connection piece 120.

Further, the distance from the end close to the pin body 110 to the end of the tab connection sheet 120 far from the pin body 110 is 3 mm-5 mm. In the prior art, the welding joint cannot directly abut against one end of the tab connection piece 120, which is close to the pin main body 110, and the distance from the tab connection piece 120, which is close to the pin main body 110, to one end of the tab connection piece 120, which is far away from the pin main body 110, is 8 mm-10 mm. Through seting up on pin main part 110 dodges hole 113 in this application, pass through the accommodation space for the welded joint, effectively reduced the size of tab connection piece 120 by the one end that is close to pin main part 110 to the one end that tab connection piece 120 kept away from pin main part 110, and then practice thrift tab connection piece 120 and the holistic installation space of tab pin 100. It should be noted that, in this embodiment, the distance from the end close to the pin main body 110 to the end far away from the pin main body 110 of the tab connection piece 120 is 4mm, so that the welding effect of the electrode tab and the tab connection piece 120 can be fully ensured, and the size of the tab connection piece 120 can be reduced.

Further, the tab connection piece 120 includes a welding area and a bending area, wherein the welding area is welded and fixed with the electrode tab, the bending area is disposed at one end of the welding area and connected with the pin body 110, and the thickness of the bending area is smaller than that of the welding area. Specifically, in this embodiment, the welding area is parallel and level with the inside wall of buckling area, the outside wall of welding area is higher than the outside wall of buckling area, through guaranteeing that welding area and the inside wall of buckling area are parallel and level mutually, the butt location of weld joint of being convenient for, through guaranteeing that the thickness of welding area is greater than the thickness of buckling area, when electrode tab and tab connection piece 120 that need be in the same place welded fastening after the welding of completion electrode tab and tab connection piece 120 buckle, the buckling area relies on its thickness to be little, the easy atress deformation's characteristics can provide the direction of buckling for it, avoid buckling and be the wrong problem of buckling position appears, further improve the protection to electrode tab and tab connection piece 120.

In this embodiment, the distance from the end near the pin body 110 to the end far from the pin body 110 of the tab connection piece 120 is 4mm, wherein the length of the bending region is 0.8mm, and the length of the welding region is 3.2mm.

Preferably, as shown in fig. 1, the lead body 110 includes a first lead body portion 111 and a second lead body portion 112, wherein the first lead body portion 111 is electrically connected with the electrode post 310, the second lead body portion 112 is bent at a first predetermined angle with the first lead body portion 111, and tab connection pieces 120 are disposed on two opposite sides of the second lead body portion 112. Because the electrode tab pin 100 is used for electrically connecting the electrode post 310 and the electrode tab together, and the electrode tab and the electrode post 310 in the battery are far apart, the pin main body 110 is divided into the first pin main body part 111 and the second pin main body part 112, so that the pin main body is adapted to the structural arrangement in the battery, and the connection effect of the electrode tab pin 100 to the electrode post 310 and the electrode tab can be ensured.

Specifically, in the present embodiment, the first preset angle is 90 °. The battery cell in this embodiment is a square battery, the electrode tab of the battery cell is led out from the side wall thereof, and the electrode post 310 is disposed above the battery cell, so that the first preset angle between the first pin body 111 and the second pin body 112 is 90 °, the first pin body 111 is disposed above the battery cell, and the second pin body 112 is disposed on the side surface of the same side as the electrode tab in the battery cell. In other embodiments, the first preset angle between the first pin body 111 and the second pin body 112 may also be adaptively adjusted according to the relative positions of the electrode post 310 and the electrode tab in the actual processing scene, which is not specifically limited in this embodiment.

In addition, in order to further improve the bending structural stability of the first and second lead body parts 111 and 112, reinforcing ribs are provided inside the bending regions of the first and second lead body parts 111 and 112. By supporting the first pin body portion 111 and the second pin body portion 112 with the reinforcing ribs, the problem that the first preset angle between the first pin body portion 111 and the second pin body portion 112 is increased or decreased due to the stress can be avoided. The effect of improving the stability of the bending structure of the pin body 110 is achieved.

In the present embodiment, the thickness of the first pin body portion 111 is 1mm to 2mm, and the thickness of the second pin body portion 112 is 0.4mm to 1mm. Since the value of the current flowing through the second pin body 112 is smaller than the value of the current flowing through the first pin body 111 during the actual operation of the battery, the thickness of the second pin body 112 can be reduced adaptively. In addition, the thickness of the second lead body 112 is reduced, so that the tab connection piece 120 and the electrode tab can be easily welded and fixed. Specifically, in the present embodiment, the thickness of the first pin body portion 111 is 1.5mm, and the thickness of the second pin body portion 112 is 0.6mm. In other embodiments, the thicknesses of the first pin body 111 and the second pin body 112 may be adaptively adjusted according to actual requirements, and only the thickness of the first pin body 111 is required to be within the range of 1mm to 2mm and the thickness of the second pin body 112 is required to be within the range of 0.4mm to 1mm, which is not particularly limited in this embodiment.

Further, the first pin body 111 is provided with a post mating hole 1111, and the post mating hole 1111 is mated and fixed with the electrode post 310. In the present embodiment, the electrode post 310 is interference fit with the post mating hole 1111, and when the electrode post 310 needs to be electrically connected and fixed to the first pin body 111, the electrode post 310 may be inserted into the post mating hole 1111.

In addition, the first pin main body 111 is further provided with a cover plate positioning hole 1112, a positioning protrusion is disposed on the lower end surface of the battery cover plate 300, and the positioning protrusion is in interference fit with the cover plate positioning hole 1112, so that the fixing effect of the tab pin 100 and the battery cover plate 300 can be further ensured by disposing the cover plate positioning hole 1112 and the positioning protrusion, the electrode pole 310 is prevented from being separated from the pole butt joint hole 1111, and the electrical connection stability of the pin main body 110 and the electrode pole 310 is further improved.

In the present embodiment, as shown in fig. 1, the tab connection piece 120 extends horizontally in a direction away from the first lead body 111, and the electrode tab after the welding and fixing and the tab connection piece 120 are folded and attached to the end surface of the second lead body 112 on the side away from the first lead body 111. In other embodiments, the tab connection piece 120 may extend horizontally in a direction approaching the first lead body 111, and the electrode tab and the tab connection piece 120 after being welded and fixed are bent and attached to the end face of the second lead body 112 on the side approaching the first lead body 111, which is not particularly limited in this embodiment.

The embodiment also provides a battery. As shown in fig. 2, the battery includes a battery cover 300, a battery housing 200, a battery cell (not shown in the figure) and a tab pin 100, an electrode tab is led out from the battery cell, an electrode post 310 is led out from the battery cover 300, one end of the tab pin 100 is connected with the electrode post 310 on the battery cover 300, the other end of the tab pin 100 is connected with the electrode tab, and the battery cell and the tab pin 100 are both accommodated in an accommodating space formed by the battery housing 200 and the battery cover 300.

According to the battery, the tab pin 100 is used, the electrode pole piece is welded and fixed on the tab connecting piece 120 from one end of the tab connecting piece 120, which is close to the pin main body 110, and the tab connecting piece 120 does not need to be additionally extended, so that the installation space of the tab connecting piece 120 is saved, the installation space of the tab pin 100 is further saved, and the specific energy density of the battery is improved. And electrode tab and tab connection piece 120 that still be convenient for weld fixation together buckle, improve tab connection piece 120's bending effect, and then improve the protection to the battery. In addition, through offer dodging hole 113 on pin main part 110, not only can further reduce the weight of pin main part 110, practice thrift manufacturing cost, but also can reduce the electric current area of passing through of pin main part 110, and then reduce the biggest excessive current value of electric current of pin main part 110, provide overcurrent protection for pin main part 110, avoid the too big direct damage battery of electric current that flows through pin main part 110.

Further, the battery cover 300 includes a cover main body 320 and an electrode post 310, wherein the cover main body 320 is provided with a liquid injection hole 330, and electrolyte is injected into a battery cell accommodated in the battery case 200 along the liquid injection hole 330.

In addition, the cover plate main body 320 is further provided with an explosion-proof hole 340, and an explosion-proof valve is installed in the explosion-proof hole 340, wherein the explosion pressure threshold of the explosion-proof valve is lower than that of the battery. When the internal pressure of the battery is continuously increased, the internal pressure of the battery reaches the explosion pressure threshold value of the explosion-proof valve, the explosion-proof valve rate is opened first, and then the internal pressure of the battery is released, so that the explosion of the battery is prevented. Specifically, the explosion-proof valve comprises an explosion-proof membrane and a protection sheet, wherein the protection sheet is covered above the explosion-proof membrane, a sheet area is arranged on the explosion-proof membrane, and the explosion pressure threshold value of the sheet area is smaller than that of the battery case 200. When the flake region explodes, the protection piece can collect the explosion piece of flake region together, avoids explosion piece atress splash.

It is to be understood that the above examples of the present utility model are provided for clarity of illustration only and are not limiting of the embodiments of the present utility model. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the utility model are desired to be protected by the following claims.

Claims (10)

1. Lug pin, its characterized in that includes:

a pin body (110); and

two tab connection pieces (120), dodge hole (113) have been seted up on pin main part (110), dodge the pore wall in hole (113) both sides respectively with two the inside wall looks parallel and level of tab connection piece (120), welded joint can stretch into dodge in hole (113) and butt be in tab connection piece (120) with dodge on the pore wall in hole (113), in order to follow electrode tab is followed tab connection piece (120) are close to one end welded fastening of pin main part (110) is in on tab connection piece (120).

2. The tab pin according to claim 1, wherein the tab connection piece (120) comprises:

the welding area is welded and fixed with the electrode lug; and

and the bending region is arranged at one end of the welding region and is connected with the pin main body (110), and the thickness of the bending region is smaller than that of the welding region.

3. The tab pin according to claim 1, wherein the distance from the end near the pin body (110) to the end of the tab connection piece (120) remote from the pin body (110) is 3mm to 5mm.

4. The tab pin according to claim 1, wherein the pin body (110) comprises:

a first lead body part (111) electrically connected to the electrode post (310); and

the second pin main body part (112) is bent and arranged at a first preset angle with the first pin main body part (111), and the lug connection sheets (120) are arranged on two side edges of the second pin main body part (112) which are arranged oppositely.

5. The tab pin according to claim 4, wherein the first pin body portion (111) is provided with a post mating hole (1111), and the post mating hole (1111) is mated and fixed with the electrode post (310).

6. The tab pin of claim 4, wherein the first predetermined angle is 90 °.

7. The tab lead according to claim 4, wherein the thickness of the first lead body portion (111) is 1mm to 2mm and the thickness of the second lead body portion (112) is 0.4mm to 1mm.

8. The tab pin according to claim 4, wherein the tab connection piece (120) extends horizontally in a direction away from or towards the first pin body portion (111).

9. The tab lead according to claim 4, wherein the inner sides of the bending regions of the first lead body portion (111) and the second lead body portion (112) are provided with reinforcing ribs.

10. The battery is characterized by comprising a battery cover plate (300), a battery shell (200), a battery cell and the electrode lug pins according to any one of claims 1-9, wherein electrode lugs are led out of the battery cell, electrode pole posts (310) are led out of the battery cover plate (300), one end of each electrode lug pin is electrically connected and fixed with the electrode pole posts (310) on the battery cover plate (300), the other end of each electrode lug pin is electrically connected and fixed with each electrode lug, and the battery cell and each electrode lug pin are accommodated in an accommodating space formed by the battery shell (200) and the battery cover plate (300).