CN218101624U

CN218101624U - Current collecting member, battery cell, battery pack and battery pack

Info

Publication number: CN218101624U
Application number: CN202221912576.1U
Authority: CN
Inventors: 张男
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-07-22
Filing date: 2022-07-22
Publication date: 2022-12-20
Anticipated expiration: 2032-07-22

Abstract

The application provides a current collecting member, a battery cell, a battery pack and a battery pack. The current collecting member includes: disk body, connector and tail body. The connector comprises a first bending section, a connecting section and a second bending section, and the connecting section is connected between the first bending section and the second bending section. The disk body, the connecting body and the tail body are sequentially connected along a first direction, the disk body is fixedly connected with the first bending section, and the tail body is fixedly connected with the second bending section. The first bending section or/and the second bending section is/are provided with reinforcing ribs. The current collecting component can solve the technical problem that the current collecting component in the prior art is prone to cracking and breaking.

Description

Current collecting member, battery cell, battery pack and battery pack

Technical Field

The application relates to the technical field of batteries, in particular to a current collecting component, a single battery, a battery pack and a battery pack.

Background

The rechargeable battery has the advantages of high energy density, high power density, multiple recycling times, long storage time and the like, so that the rechargeable battery is widely applied to the fields of electric automobiles, mobile equipment and the like.

The current collecting component is an important structure for connecting the battery tab and the cover plate pole. In general, in order to connect the battery tab and the cap plate post, the current collecting member needs to be bent. The current collecting members in the prior art are generally in a sheet structure, and when the battery is vibrated or collided, the bent parts of the current collecting members are easy to crack or even break, so that the safety performance of the battery is poor.

SUMMERY OF THE UTILITY MODEL

The application provides a mass flow component, battery monomer, group battery and battery package to solve the mass flow component among the prior art and easily split, cracked technical problem.

To solve the above problem, the present application provides, in a first aspect, a current collecting member including: disk body, connector and tail body. The connector comprises a first bending section, a connecting section and a second bending section, wherein the connecting section is connected between the first bending section and the second bending section. The disk body, the connecting body and the tail body are sequentially connected along a first direction, the disk body is fixedly connected with the first bending section, and the tail body is fixedly connected with the second bending section. The first bending section or/and the second bending section is/are provided with reinforcing ribs.

In a possible embodiment, the reinforcing ribs are protrusions or grooves.

In a possible embodiment, the reinforcing rib comprises a first reinforcing rib and a second reinforcing rib, the first reinforcing rib comprises at least one first sub-reinforcing rib, and at least one first sub-reinforcing rib is arranged on the first bending section; the second reinforcing rib comprises at least one second sub reinforcing rib, and the at least one second sub reinforcing rib is arranged on the second bending section.

In a possible implementation manner, the number of the first sub-reinforcing ribs is multiple, and the multiple first sub-reinforcing ribs are arranged side by side and at intervals along the bending direction of the first bending section; the second sub-reinforcing ribs are multiple, and along the bending direction of the second bending section, the second sub-reinforcing ribs are arranged side by side at intervals.

In one possible embodiment, there are two first sub reinforcing ribs and two second sub reinforcing ribs; or, the number of the first sub-reinforcing ribs is four, and the number of the second sub-reinforcing ribs is four.

In a possible implementation manner, each first sub-reinforcing rib is partially arranged on the surface of the first bending section and partially arranged on the surface of the disc body; each second sub-reinforcing rib is arranged on the second bending part partially and arranged on the surface of the tail body partially.

In a possible embodiment, the reinforcing rib and the connecting body are integrally formed.

In a possible embodiment, the reinforcing bars are bonded or welded to the surface of the connecting body.

In a second aspect, the present application provides a battery cell, including a cell body, a positive tab, a positive terminal, a positive current collecting member, a negative tab, a negative terminal, and a negative current collecting member. The positive electrode lug and the negative electrode lug are respectively connected to two opposite ends of the electric core main body, two opposite ends of the positive current collecting component are respectively electrically connected with the positive electrode lug and the positive electrode terminal, and two opposite ends of the negative current collecting component are respectively electrically connected with the negative electrode lug and the negative electrode terminal. The positive current collecting member or/and the negative current collecting member is/are the current collecting member.

In a possible embodiment, the positive current collecting member is the current collecting member, the tray body, the connecting section and the tail body are arranged in parallel and at an interval, the connecting section is located between the tray body and the tail body, and the first bending section, the second bending section and the reinforcing rib are bent in an arc shape.

In a third aspect, the present application provides a battery pack including at least one of the above-described battery cells.

In a fourth aspect, the present application provides a battery pack comprising at least one battery pack as described above.

Synthesize the aforesaid, the mass flow component that this application provided sets up the strengthening rib through first buckling segment and second buckling segment, and first buckling segment drives the strengthening rib when buckling with the second buckling segment and buckles, make the strengthening rib can share the bending force that first buckling segment and second buckling segment buckled the production, thereby reduce the bending force that first buckling segment and second buckling segment self received, and then can avoid first buckling segment and second buckling segment to take place to split or fracture, promote the anti bending capability of mass flow component, promote the stability and the security of battery package.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments or the background art of the present application, the drawings required to be used in the embodiments or the background art of the present application will be described below.

Fig. 1 is a schematic structural diagram of a battery pack provided in an embodiment of the present application;

fig. 2 is a schematic view of the structure of a battery pack in the battery pack shown in fig. 1;

fig. 3 is an enlarged schematic structural view of the battery cell in fig. 2;

fig. 4 is a schematic cross-sectional view of the battery cell shown in fig. 3;

fig. 5 is a schematic structural view of a current collecting member provided in the first embodiment of the present application;

fig. 6 is a schematic structural view of a current collecting member provided in a second embodiment of the present application;

fig. 7 is a schematic structural view of a current collecting member according to a third embodiment of the present application.

Detailed Description

Embodiments of the present application are described below with reference to the accompanying drawings.

Referring to fig. 1 and fig. 2, fig. 1 is a schematic structural diagram of a battery pack 200 according to an embodiment of the present disclosure, and fig. 2 is a schematic structural diagram of a battery pack 110 in the battery pack 200 shown in fig. 1.

In this embodiment, the battery pack 200 is a secondary battery. Such as nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid (or lead-storage) batteries, lithium ion batteries, polymer lithium ion batteries, and the like. In other embodiments, the battery pack 200 may also be a lithium ion primary battery, a lithium sulfur battery, a sodium lithium ion battery or a sodium ion battery or a magnesium ion battery, etc. The battery pack 200 may be applied to a vehicle. Vehicles include, but are not limited to, pure Electric vehicles (Pure Electric Vehicle/Battery Electric Vehicle, PEV/BEV), hybrid Electric vehicles (Hybrid Electric Vehicle, HEV), extended Range Electric vehicles (REEV), plug-in Hybrid Electric vehicles (PHEV), or New Energy vehicles (New Energy Vehicle). Of course, the battery pack 200 may be applied to other electric devices.

The shape of the battery pack 200 may be a cylinder, a rectangular parallelepiped, or other shapes. The battery pack 200 includes a case 120 and a battery pack 110. The housing 120 is a metal housing, such as an aluminum housing. Of course, the housing 120 may be made of other materials. The housing 120 includes a body 1201, a first cover 1202, and a second cover 1203. The body 1201 encloses a receiving cavity 1204 having openings at both ends. The first cover plate 1202 and the second cover plate 1203 are disposed opposite to each other, and the first cover plate 1202 and the second cover plate 1203 cover the openings at the two ends of the accommodating cavity 1204 respectively and are connected to the body 1201 in a sealing manner, so that the accommodating cavity 1204 is sealed. The first cover plate 1202 is provided with positive posts 130 and the second cover plate 1203 is provided with negative posts 140.

There is at least one battery pack 110. In this embodiment, when there are a plurality of battery packs 110, the plurality of battery packs 110 may be connected in series. In other embodiments, a plurality of battery packs 110 may also be connected in parallel, or a combination of series and parallel connections. The battery pack 110 includes a positive electrode and a negative electrode. The battery pack 110 is disposed in the receiving cavity 1204, and a positive electrode of the battery pack 110 is electrically connected to the positive post 130 disposed on the first cover plate 1202, and a negative electrode of the battery pack 110 is electrically connected to the negative post 140 disposed on the second cover plate 1203. The current of the battery pack 110 flows from the positive pole to the positive post 130, then to the external power consumer, and then to the negative pole of the battery pack 110 from the negative post 140, thereby achieving current circulation.

Each battery pack 110 includes at least one battery cell 100. In this embodiment, one battery pack 110 includes a plurality of battery cells 100. The plurality of battery cells 100 are arranged at intervals. A plurality of battery cells 100 may be connected in series, or in parallel, or in a combination of series and parallel to achieve a larger capacity and power.

Referring to fig. 3 and 4, fig. 3 is an enlarged schematic structural diagram of the battery cell 100 in fig. 2, and fig. 4 is a schematic sectional structural diagram of the battery cell 100 shown in fig. 3.

In this embodiment, the battery cell 100 is a cylinder. In other embodiments, the battery cell 100 may also be rectangular, or other shapes. The battery cell 100 includes a casing 20, a first end cap 21, a second end cap 22, a cell main body 23, a positive electrode lead-out assembly 30a, and a negative electrode lead-out assembly 30b. The housing 20 is cylindrical. The housing 20 has a receiving space 24 therein, and the housing 20 has openings at both axial ends thereof. The first end cap 21 and the second end cap 22 are respectively covered on the two opposite axial ends of the housing 20 and fixedly connected with the housing 20.

The cell main body 23 includes a positive electrode tab, a negative electrode tab, a separator, and an electrolyte (not shown). The positive plate, the isolation film and the negative plate are arranged in a stacked mode, and the isolation film is located between the positive plate and the negative plate to isolate the positive plate from the negative plate. The positive plate, the isolating film and the negative plate are wound to form a cylinder. The electrolyte is positioned on the surfaces of the positive plate and the negative plate. The cell main body 23 is located in the accommodating space 24 and is fixedly connected to the casing 120. The positive electrode tab is electrically connected to the positive electrode lead-out assembly 30a, and the negative electrode tab is electrically connected to the negative electrode lead-out assembly 30b.

The positive lead-out assembly 30a includes a positive tab 31a, a positive current collecting member 10a, and a positive terminal 32a. The positive terminal 32a is provided on the first end cap 21 and is fixedly connected to the first end cap 21. One end of the positive electrode terminal 32a faces the inside of the housing space 24, and the other end faces the outside of the first cap 21. The positive tab 31a is provided on the positive plate and is positioned in the receiving space 24, and the positive tab 31a is electrically connected to the positive plate. The positive current collecting member 10a is located in the housing space 24 and is provided between the positive electrode terminal 32a and the positive electrode tab 31 a. One end of the positive current collecting member 10a is electrically connected to the positive electrode terminal 32a, and the other end is electrically connected to the positive electrode tab 31 a.

The negative electrode lead assembly 30b includes a negative electrode tab 31b, a negative current collecting member 10b, and a negative electrode terminal 32b. The negative electrode lead-out assembly 30b is located at one end of the cell main body 23 far away from the positive electrode lead-out assembly 30 a. The negative terminal 32b is provided on the second end cap 22 and is fixedly connected to the second end cap 22. One end of the negative terminal 32b faces the inside of the housing space 24, and the other end faces the outside of the first cap 21. The negative electrode tab 31b is disposed on the negative electrode sheet and located in the receiving space 24, and the negative electrode tab 31b is electrically connected to the negative electrode sheet. The negative current collecting member 10b is located in the housing space 24 and is provided between the negative electrode terminal 32b and the negative electrode tab 31 b. One end of the negative current collecting member 10b is electrically connected to the negative electrode terminal 32b, and the other end is electrically connected to the negative electrode tab 31 b.

The current flowing through the cell body 23 flows from the positive electrode tab to the positive electrode tab 31a, then to the positive current collecting member 10a, then to the positive electrode terminal 32a, and then from the positive electrode terminal 32a to the external electric device. After passing through the external electrical device, the current flows to the negative terminal 32b, then flows from the negative terminal 32b to the negative current collecting member 10b, then flows from the negative current collecting member 10b to the negative terminal 32b, then flows to the negative tab 31b, and then flows to the negative tab, so that the current is circulated to supply power to the external electrical device.

The positive current collecting member 10a and the negative current collecting member 10b may have different structures or the same structure. For convenience of description, either the positive current collecting member 10a or the negative current collecting member 10b may be referred to as a current collecting member 10. When the positive current collecting member 10a and the negative current collecting member 10b are different in structure, one of the positive current collecting member 10a and the negative current collecting member 10b is the current collecting member 10. The positive current collecting member 10a and the negative current collecting member 10b are identical in structure, and both the positive current collecting member 10a and the negative current collecting member 10b are current collecting members 10.

In this embodiment, the positive current collecting member 10a and the negative current collecting member 10b have the same structure, and the current collecting member 10 will be described as a specific embodiment.

Referring to fig. 5, fig. 5 is a schematic structural diagram of a current collecting member 10 according to a first embodiment of the present application.

For convenience of description, in the present application, the length direction of the current collecting member 10 is defined as an X direction, the width direction of the current collecting member 10 is defined as a Y direction, and the thickness direction of the current collecting member 10 is defined as a Z direction. The X direction, the Y direction and the Z direction are vertical to each other.

The current collecting member 10 is a metal foil. In the present embodiment, the current collecting member 10 is a copper foil. In other embodiments, current collecting member 10 may also be an aluminum foil, or other metallic foil. The current collecting member 10 includes a disk body 11, a connecting body 12, and a tail body 13. The connection body 12 is connected between the tray body 11 and the tail body 13, and the tray body 11, the connection body 12, and the tail body 13 are arranged in the first direction (X direction).

The tray body 11 is substantially circular. The outer periphery of the tray body 11 includes a first side 111 and a second side 112. The first side 111 is circular arc-shaped, and the extending direction of the first side 111 is consistent with the circumference of the circle. In this embodiment, the first side 111 is a major arc. That is, the arc of the first side 111 is greater than 90 degrees. The second side 112 is linear. The second side 112 extends in a direction parallel to the Y direction. The second side 112 is connected to opposite ends of the first side 111 at opposite ends in the extending direction thereof, respectively. The first side 111 and the second side 112 enclose the periphery of the tray body 11.

The tray body 11 is provided with a through hole 113. The through hole 113 penetrates the tray body 11 in the Z direction. In this embodiment, there is one through hole 113. And, the through hole 113 is located at the center of the tray body 11. In other embodiments, there may be two through holes 113. The two through holes 113 are provided at intervals. The through-hole 113 is used for injecting electrolyte and guiding gas. When the current collecting member 10 is mounted between the cell body 23 and the positive terminal 32a, the tray 11 is fixedly connected to the positive tab 31a, the electrolyte is injected into the cell body 23 through the through hole 113, and the gas generated in the cell body 23 is discharged to the outside through the through hole 113. When the current collecting member 10 is mounted between the cell body 23 and the negative electrode terminal 32b, the tray 11 is fixedly connected to the negative electrode tab 31 b.

In one embodiment, the tray 11 may further include air vents (not shown). The air holes penetrate through the tray body 11 in the Z direction. The air holes are spaced apart from the through holes 113. One or more air vents may be provided. In this embodiment, through additionally setting up the air guide hole, can further with the gas outgoing external in electric core main part 23 to avoid battery package 200 to swell, cause the potential safety hazard.

In one embodiment, tray 11 is further provided with a recess (not shown). The groove is provided on the surface of the tray body 11. The recess includes a bottom wall. When the current collecting member 10 is mounted between the cell body 23 and the positive terminal 32a, the positive tab 31a is positioned in the groove, and the surface of the positive tab 31a is in contact with and fixedly connected to the bottom wall of the groove. When the current collecting member 10 is mounted between the cell main body 23 and the negative electrode terminal 32b, the negative electrode tab 31b is located in the groove, and the surface of the negative electrode tab 31b is in contact with and fixedly connected to the bottom wall of the groove. In this embodiment, the tab and the disk body 11 are fixedly connected and electrically connected by welding. The bottom wall of the groove can provide a welding spot position for welding between the pole lug and the disc body 11 so as to facilitate welding, and therefore the connection stability of the pole lug and the current collecting component 10 and the current transmission stability of the pole lug to the current collecting component 10 can be improved.

In this embodiment, the connecting body 12 is rectangular. The connector 12 includes a first side 101, a second side 102, a third side 103, and a fourth side 104. The first side 101 and the second side 102 are disposed opposite to each other, and the first side 101 and the second side 102 are opposite sides of the connecting body 12 in the X direction. The third side 103 is disposed opposite to the fourth side 104, and the third side 103 and the fourth side 104 are opposite sides of the connecting body 12 in the Y direction. The first side 101, the third side 103, the second side 102 and the fourth side 104 are connected end to form the outer perimeter of the connector 12. The width of the connector 12 is approximately the same as the length of the second side 112 of the tray 11. That is, the length of the first side 101 is substantially the same as the length of the second side 112, and the dimension of the connector 12 in the Y direction is substantially the same as the dimension of the second side surface in the Y direction. Of course, the length of the first side 101 of the connector 12 may be slightly greater than the length of the second side 112, or slightly less than the length of the second side 112.

Connector 12 includes a first bend 121, a second bend 122, and a connecting segment 123. The connecting section 123 is connected between the first bending section 121 and the second bending section 122, and the first bending section 121, the connecting section 123 and the second bending section 122 are sequentially connected along the X direction. Wherein, the side of the first bending section 121 facing away from the connecting section 123 is the first side 101 of the connecting body 12, and the side of the second bending section 122 facing away from the connecting section 123 is the second side 102 of the connecting body 12. The connecting body 12 is fixedly connected with the tray body 11. The first bending section 121 is fixedly connected to the tray body 11, and the first side 101 is fixedly connected to the second side 112.

The aft-body 13 is generally rectangular. The aft-body 13 includes a third side 131 and a fourth side 132. The fourth side 132 is linear, and the extending direction of the fourth side 132 is parallel to the Y direction. The third side 131 includes a plurality of straight lines. One end of the third side 131 is connected to one end of the fourth side 132, and the other end is connected to the other end of the fourth side 132. Third side 131 and fourth side 132 enclose the outer perimeter of aft-body 13. In other embodiments, the aft-body may also be substantially circular. When the tail body 13 is substantially circular, the third side is a major arc and the fourth side is a linear shape. The tail body 13 is fixedly connected with the connecting body 12. Wherein the fourth side 132 is fixedly connected to the second side 102.

The aft-body 13 is provided with a mounting hole 133. In this embodiment, the mounting hole 133 is a blind hole, and the mounting hole 133 is disposed in the center of the tail body 13. Blind holes refer to via holes that connect the surface layer and the inner layer without penetrating the entire board. That is, when the mounting hole 133 is a blind hole, the mounting hole 133 is recessed in the surface of the tail body 13, but does not penetrate the tail body 13. In other embodiments, the mounting hole 133 may be a through hole. When the mounting hole 133 is a through hole, the mounting hole 133 penetrates the tail body 13 in the Z direction. One or more mounting holes 133 may be provided. In this embodiment, the tail 13 can be easily and fixedly connected to the positive terminal 32a or the negative terminal 32b by providing the mounting hole 133.

In this embodiment, the connection body 12, the tail body 13 and the tray body 11 are integrally formed, so as to ensure the connection stability between the connection body 12 and the tray body 11 and between the connection body 12 and the tail body 13. In other embodiments, the connecting body 12, the tail body 13 and the tray body 11 may be three separate structural members, and the connecting body 12 is fixedly connected and electrically connected with the tail body 13 and the tray body 11 by welding or other methods.

Referring to fig. 5, the first bending portion 121 and the second bending portion 122 are provided with reinforcing ribs. The reinforcing beads include a first reinforcing bead 14 and a second reinforcing bead 15. The first reinforcing rib 14 is disposed on the first bending section 121, and the second reinforcing rib 15 is disposed on the second bending section 122. The first reinforcing bead 14 includes two first sub-reinforcing beads 141. In this embodiment, the outer profile of the first sub-bead 141 is rectangular, and the length direction of the first sub-bead 141 is parallel to the X direction. In other embodiments, the first sub-reinforcing rib 141 may also have other shapes such as a long bar shape, an oval shape, or a wave shape, and the shape of the first sub-reinforcing rib 141 is not particularly limited. The two first sub-beads 141 are arranged at intervals in the Y-direction. Each of the first sub-beads 141 is partially located on the surface of the first bent section 121 and partially located on the surface of the tray body 11. That is, the first sub-reinforcing rib 141 spans the first side 101 and the second side 112 and is fixedly connected to the first bent section 121 and the tray body 11.

In this embodiment, the first sub-reinforcing rib 141 is a protrusion. The first reinforcing bead 14 is formed on the surfaces of the connection body 12 and the tray body 11 by press-molding. Alternatively, the first reinforcing rib 14 may be integrally formed with the connecting body 12 and the tray body 11, which facilitates processing, and can reduce the number of process steps and improve the production efficiency. In other embodiments, the first sub-reinforcing bead 141 may also be a groove or an additional reinforcing structure. When the first sub-beads 141 are grooves, the first beads 14 are formed on the surfaces of the connection body 12 and the tray body 11 by press molding. When the first reinforcing rib 14 is an additional reinforcing structure, the first reinforcing rib 14 may be made of metal, fiber or alloy, and the first reinforcing rib 14 is fixed to the surfaces of the connecting body 12 and the tray body 11 by welding or bonding.

The second reinforcing bead 15 has the same structure as the first reinforcing bead 14. The second reinforcing bead 15 includes two second sub-reinforcing beads 151. In this embodiment, the outer contour of the second sub-bead 151 is rectangular, and the length direction of the second sub-bead 151 is parallel to the X-direction. In other embodiments, the second sub-reinforcing rib 151 may also have other shapes such as a long bar shape, an oval shape, or a wave shape, and the shape of the second sub-reinforcing rib 151 is not particularly limited herein. The two second sub-reinforcing ribs 151 are arranged at intervals in the Y-direction. In this embodiment, the two first sub-reinforcing ribs 141 and the two second sub-reinforcing ribs 151 are arranged side by side in one-to-one correspondence along the X direction. In another embodiment, the first sub-beads 141 and the second sub-beads 151 may be disposed to be offset. Each second rib 15 is located partially on the surface of the second bend 122 and partially on the surface of the tail body 13. That is, the second sub-reinforcing rib 151 crosses the second side 102 and the fourth side 132 and is fixedly connected to the second bending section 122 and the tail body 13. The second reinforcing rib 15 may be a protrusion, a groove, or an additional reinforcing structure.

Referring to fig. 4, when the current collecting member 10 (positive current collecting member 10 a) is installed between the positive tab 31a and the positive terminal 32a, the tray 11 is fixedly connected and electrically connected to the positive tab 31a, and the tail 13 is fixedly connected and electrically connected to the positive terminal 32a, so as to electrically connect the positive tab 31a and the positive terminal 32a. The tray body 11 and the tail body 13 are arranged in parallel and at intervals, and the connecting body 12 is positioned between the tray body 11 and the tail body 13 and arranged in parallel with the tray body 11 and the tail body 13. The first bending section 121 is bent in an arc shape along the Y direction and connected between the connection section 123 and the tray body 11, and the first reinforcing rib 14 is bent in an arc shape along the Y direction. The second bending section 122 is bent in an arc shape along the Y direction and is connected between the tail body 13 and the connecting section 123, and the second reinforcing rib 15 is bent in an arc shape along the Y direction.

In this embodiment, the first reinforcing rib 14 is disposed on the first bending section 121, and the first bending section 121 drives the first reinforcing rib 14 to bend when bending, so that the first reinforcing rib 14 can share the bending acting force generated by bending the first bending section 121, thereby reducing the bending acting force applied to the first bending section 121, preventing the first bending section 121 from cracking or breaking, improving the bending resistance of the current collecting member 10, and improving the stability and safety of the battery pack 200. Meanwhile, the second reinforcing rib 15 is arranged on the second bending section 122, and the second bending section 122 drives the second reinforcing rib 15 to bend when bending, so that the second reinforcing rib 15 can share the bending acting force generated by bending the second bending section 122, the bending acting force received by the second bending section 122 is reduced, the second bending section 122 is prevented from cracking or breaking, and the bending resistance of the flow collecting member 10 is further improved.

When current collecting member 10 (negative current collecting member 10 b) is mounted between negative electrode tab 31b and negative electrode terminal 32b, tab 11 is fixedly connected and electrically connected to negative electrode tab 31b, and tail 13 is fixedly connected and electrically connected to negative electrode terminal 32b, thereby achieving electrical connection between negative electrode tab 31b and negative electrode terminal 32b. The tray body 11, the connecting body 12 and the tail body 13 are arranged in parallel and at intervals, and the connecting body 12 is located between the tray body 11 and the tail body 13. The first bending section 121 and the second bending section 122 are both bent in an arc shape along the Y direction.

Referring to fig. 6, fig. 6 is a schematic structural diagram of a current collecting member 10 according to a second embodiment of the present application.

The present embodiment is different from the embodiment shown in fig. 5 in that the first reinforcing bead 14 includes four first sub-reinforcing beads 141 and the second reinforcing bead 15 includes four second sub-reinforcing beads 151. The four first sub-beads 141 are arranged side by side and at intervals in the Y-direction. Each first reinforcing rib 14 is partially located on the surface of the first bending section 121 and partially located on the surface of the tray body 11. That is, the first sub-reinforcing rib 141 spans the first side 101 and the second side 112 and is fixedly connected to the first bent section 121 and the tray body 11. The four second sub-reinforcing ribs 151 are arranged side by side and at intervals in the Y direction. The four second sub-beads 151 are arranged in parallel to the four first sub-beads 141 in a one-to-one correspondence. Each second stiffener 15 is located partially on the surface of the second bend 122 and partially on the surface of the tray body 11. That is, the second sub-reinforcing rib 151 crosses the second side 102 and the fourth side 132 and is fixedly connected with the second bending portion 122 and the tray body 11.

When the current collecting member 10 is installed between the positive tab 31a and the positive terminal 32a, or between the negative tab 31b and the negative terminal 32b, the first bending section 121 bends to drive the four first sub-reinforcing ribs 141 to bend, and the second bending section 122 bends to drive the four second sub-reinforcing ribs 151 to bend, so that the bending resistance of the current collecting member 10 can be further improved, the first bending section 121 and the second bending section 122 are prevented from cracking or breaking, and the safety performance and the durability of the battery pack 200 are improved.

Referring to fig. 7, fig. 7 is a schematic structural diagram of a current collecting member 10 according to a third embodiment of the present application.

The present embodiment is different from the embodiment of fig. 5 in that the first reinforcing rib 14 is disposed on the first bending section 121, and the first sub-reinforcing rib 141 is completely disposed on the surface of the first bending section 121. The second reinforcing rib 15 is disposed on the second bending section 122, and the second sub-reinforcing rib 151 is completely disposed on the surface of the second bending section 122.

In one embodiment, the first reinforcing bead 14 may be one, three, or more than five. The number of the second reinforcing ribs 15 may be one, three, or five or more.

In one embodiment, the current collecting member 10 may also include the first reinforcing rib 14 without the second reinforcing rib 15. That is, the first bending section 121 is provided with the first reinforcing bead 14, and the second bending section 122 is not provided with the reinforcing bead. Alternatively, the current collecting member 10 may include the second reinforcing rib 15 without the first reinforcing rib 14. That is, the second bending section 122 is provided with the second reinforcing rib 15, and the first bending section 121 is not provided with the reinforcing rib.

The above embodiments and embodiments of the present application are only examples and embodiments, and the scope of the present application is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present application, and all the changes or substitutions should be covered within the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.

Claims

1. A current collecting member, comprising: the tray body, the connecting body and the tail body;

the connecting body comprises a first bending section, a connecting section and a second bending section, the connecting section is connected between the first bending section and the second bending section, the disk body, the connecting body and the tail body are sequentially connected along a first direction, the disk body is fixedly connected with the first bending section, and the tail body is fixedly connected with the second bending section;

the first bending section or/and the second bending section is/are provided with reinforcing ribs.

2. The current collecting member of claim 1, wherein the reinforcing ribs are protrusions or grooves.

3. The current collecting member according to claim 2, wherein the reinforcing ribs include a first reinforcing rib and a second reinforcing rib, the first reinforcing rib includes at least one first sub-reinforcing rib, and at least one first sub-reinforcing rib is provided at the first bent section; the second reinforcing rib comprises at least one second sub-reinforcing rib, and the at least one second sub-reinforcing rib is arranged on the second bending section.

4. The current collecting member according to claim 3, wherein the first sub reinforcing ribs are provided in plurality, and are arranged side by side and at intervals along the bending direction of the first bending section; the second sub-reinforcing ribs are multiple, and along the bending direction of the second bending section, the second sub-reinforcing ribs are arranged side by side at intervals.

5. The current collecting member of claim 4, wherein there are two of the first sub-reinforcing ribs and two of the second sub-reinforcing ribs; or, the number of the first sub-reinforcing ribs is four, and the number of the second sub-reinforcing ribs is four.

6. The current collecting member according to any one of claims 3 to 5, wherein each of the first sub-ribs is partially provided on a surface of the first bent section and partially provided on a surface of the disk body; each second sub-reinforcing rib is arranged on the second bending part partially and arranged on the surface of the tail body partially.

7. A current collecting member according to claim 2, characterised in that the reinforcing ribs are integrally formed with the connector.

8. A current collecting member according to claim 2, characterised in that the reinforcing ribs are glued or welded to the surface of the connector.

9. A battery monomer is characterized by comprising a battery cell main body, a positive lug, a positive terminal, a positive current collecting component, a negative lug, a negative terminal and a negative current collecting component, wherein the positive lug and the negative lug are respectively connected to two opposite ends of the battery cell main body;

the positive current collecting member or/and the negative current collecting member is the current collecting member according to any one of claims 1 to 8.

10. The battery cell as recited in claim 9, wherein the positive current collecting member is the current collecting member, the tray body, the connecting section and the tail body are arranged in parallel and at intervals, the connecting section is located between the tray body and the tail body, and the first bending section, the second bending section and the reinforcing rib are bent in an arc shape.

11. A battery pack comprising at least one cell according to claim 9 or 10.

12. A battery pack comprising at least one battery pack according to claim 11.