CN116130890A

CN116130890A - Battery core connecting piece and battery

Info

Publication number: CN116130890A
Application number: CN202211666693.9A
Authority: CN
Inventors: 潘福中; 李运韬; 于林; 张景升; 牛亚琪
Original assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zhejiang Zeekr Intelligent Technology Co Ltd
Current assignee: Zhejiang Geely Holding Group Co Ltd; Weirui Electric Automobile Technology Ningbo Co Ltd; Zhejiang Zeekr Intelligent Technology Co Ltd
Priority date: 2022-12-23
Filing date: 2022-12-23
Publication date: 2023-05-16

Abstract

The invention provides a battery cell connecting piece and a battery, wherein the battery cell connecting piece is used for connecting two battery cells horizontally arranged side by side, the battery cell connecting piece is folded by itself to form two connecting plates which are arranged in a stacked manner, each connecting plate comprises a bending part and two connecting parts which are symmetrically arranged at two sides of the bending part, and the two connecting parts are respectively connected with the ends of the adjacent two battery cells in the length direction; the bending part is configured to adjust the orientations of the two connecting parts at two sides of the bending part through bending of the bending part, so that the two connecting parts of each connecting plate are mutually attached, and the adjacent two battery cells connected by the connecting piece are conducted. According to the battery cell connecting piece and the battery, when the battery cells are horizontally aligned, the battery cells are connected with the battery cell connecting piece in the horizontal direction.

Description

Battery core connecting piece and battery

Technical Field

The invention belongs to the field of automobiles, and particularly relates to a battery cell connecting piece and a battery.

Background

At present, new energy automobiles rapidly develop, and a battery is taken as the most core part of the new energy automobiles, so that the utilization rate and the energy density of the battery are very important.

The prior battery mainly comprises a shell, a plurality of electric cores and connecting pieces, wherein the electric cores and the connecting pieces are arranged in a cavity surrounded by the shell. Specifically, the electric core includes electric core body and utmost point post, and the utmost point post sets up on the lateral wall of electric core body to the connecting piece is connected the positive pole post of electric core and the negative pole post of adjacent electric core, constitutes the battery jointly.

However, only when adjacent cells are stacked in the thickness direction of the battery, the connection member can connect the poles of the adjacent cells, and when a plurality of cells are horizontally aligned, in order to save space in the thickness direction of the battery, the connection member also needs to be connected between the poles of the adjacent cells in the horizontal direction, but the connection member cannot be simultaneously connected to the poles of the adjacent cells in the horizontal direction.

Disclosure of Invention

Aiming at the defects of the prior art, the invention provides a battery cell connecting piece and a battery, which can enable a plurality of battery cells to be connected with the battery cell connecting piece in the horizontal direction when the battery cells are horizontally aligned.

The invention provides a battery cell connecting piece which is used for connecting two battery cells horizontally arranged side by side, wherein the battery cell connecting piece is folded by itself to form two connecting plates which are arranged in a stacked manner, each connecting plate comprises a bending part and two connecting parts which are symmetrically arranged at two sides of the bending part, and the two connecting parts are respectively connected with the ends of the adjacent two battery cells in the length direction; the bending part is configured to adjust the orientations of the two connecting parts at two sides of the bending part through bending of the bending part, so that the two connecting parts of each connecting plate are mutually attached, and the adjacent two battery cells connected by the connecting piece are conducted.

Optionally, the bending parts corresponding to the two connecting plates of the electric core connecting piece have different bending radiuses, so that the bending parts mutually avoid when bending.

Optionally, the bending part is arc-shaped.

Optionally, the cell connector is folded in half along its own midline to form two connection plates.

Optionally, the cell connector has two protruding portions when expanding the state, and two protruding portions are located the both sides of self central line respectively, and two protruding portions are opposite for the face direction of cell connector, and protruding portion is configured to constitute the kink after the cell connector is folding.

Optionally, the electric core connecting piece has a recess, and when the electric core connecting piece is in the expansion state, the recess passes through electric core connecting piece self central line, and the direction of extension of recess is perpendicular to the direction of electric core connecting piece fifty percent discount.

The invention provides a battery, which comprises a plurality of electric cores and a connecting assembly, wherein the connecting assembly comprises at least one electric core connecting piece, and the electric core connecting piece is connected between the ends of two adjacent electric cores in the length direction.

Optionally, the plurality of electric cores form at least one first electric core group, each electric core in the first electric core group is arranged in turn along a first horizontal direction, and the length direction of each electric core is along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction.

Optionally, the plurality of electric cores form at least one second electric core group, each electric core in the second electric core group is arranged along the second horizontal direction, and the length direction of each electric core is along the first horizontal direction.

Optionally, the electric core includes electric core body and sets up in the utmost point post of electric core body tip, and the connecting portion and the utmost point post welding of electric core connecting piece.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.

Fig. 1 is a schematic structural diagram of a battery cell connector according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a folded battery cell connector according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a bent connecting plate according to an embodiment of the present invention;

fig. 4 is a schematic structural diagram of connection between a connection portion and a battery cell according to an embodiment of the present invention;

FIG. 5 is a schematic view of one of the views of FIG. 4;

fig. 6 is a schematic structural diagram of bonding two connection parts according to an embodiment of the present invention;

FIG. 7 is an enlarged partial schematic view of FIG. 6 at A;

fig. 8 is a schematic structural diagram of an arrangement manner of electric cells in a battery according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another arrangement of battery cells in a battery according to an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a battery cell according to an embodiment of the present invention.

Reference numerals illustrate:

100-cell connectors;

110-connecting plates;

120-a boss;

130-grooves;

111-bending part;

112-a connection;

200-battery;

210-an electric core;

220-a connection assembly;

211-a first cell group;

212-a second cell group;

213-cell body;

214-pole.

Detailed Description

In order to make the above objects, features and advantages of the embodiments of the present invention more comprehensible, the technical solutions of the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the invention. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.

In order to solve the above problems, the invention provides a battery cell connecting piece and a battery, wherein the battery cell connecting piece is folded to form a connecting plate, the connecting plate comprises a bending part and two connecting parts, the two connecting parts are respectively connected with the poles of two adjacent battery cells in different directions through the bending of the bending part, and are aligned in the same direction, so that when the two battery cells are horizontally aligned, the two battery cells are connected with the battery cell connecting piece in the horizontal direction, and the space of an automobile in the height direction of the automobile body is improved.

The details of the present invention will now be further described with reference to the accompanying drawings and detailed description.

The prior battery mainly comprises a shell, a plurality of electric cores and connecting pieces, wherein the electric cores and the connecting pieces are arranged in a cavity surrounded by the shell. Specifically, the electric core includes electric core body and utmost point post, and the utmost point post sets up on the lateral wall of electric core body to the connecting piece is connected the positive pole post of electric core and the negative pole post of adjacent electric core, constitutes the battery jointly. However, only when adjacent cells are stacked in the thickness direction of the battery, the connection member can connect the poles of the adjacent cells, and when a plurality of cells are horizontally aligned, in order to save space in the thickness direction of the battery, the connection member also needs to be connected between the poles of the adjacent cells in the horizontal direction, but the connection member cannot be simultaneously connected to the poles of the adjacent cells in the horizontal direction.

The invention provides a battery cell connecting piece and a battery, wherein the battery cell connecting piece is folded to form two connecting plates which are arranged in a stacked manner, the connecting plates comprise a bending part and two connecting parts which are symmetrically arranged at two sides of the bending part, the two connecting parts which are arranged in a stacked manner are bent into a certain included angle through the bending of the bending part, so that the two connecting parts are respectively connected with pole posts of two adjacent battery cells in different directions, the included angle between the two connecting parts is adjusted, the two connecting parts are mutually attached, and the two battery cells are aligned in the same direction, so that when the two battery cells are horizontally aligned, the two battery cells are connected with the battery cell connecting piece in the horizontal direction.

Fig. 1 is a schematic structural diagram of a battery cell connector according to an embodiment of the present invention. As shown in fig. 1, the battery cell connector 100 is used for connecting two battery cells 210 arranged horizontally side by side, so that the two battery cells 210 are connected in the horizontal direction, the space in the thickness direction of the battery 200 is saved, the space of the automobile in the height direction of the automobile body is further increased, and the utilization rate of the space of the automobile in the height direction of the automobile body is improved.

Wherein the cell connector 100 is folded on itself to form two connection plates 110 arranged in a stack. Fig. 2 is a schematic structural diagram of a folded electrical core connector according to an embodiment of the present invention. As shown in fig. 2, each connecting plate 110 includes a bending portion 111 and two connecting portions 112 symmetrically disposed at two sides of the bending portion 111, and the bending portion 111 is used for bending the two connecting plates 110 stacked together into two connecting portions 112 having a certain included angle. The two connection portions 112 are respectively connected with the ends of the adjacent two electric cores 210 in the length direction, so that the electric cores 210 are connected with the connection piece through the connection of the two connection portions 112 and the ends of the two electric cores 210, and when the two electric cores 210 are horizontally aligned, the two electric cores 210 are connected with the electric core connection piece 100 in the horizontal direction.

Further, the bending portion 111 is configured to adjust the orientations of the two connection portions 112 on both sides of the bending portion 111 by bending itself. Fig. 3 is a schematic structural diagram of a bent connecting plate according to an embodiment of the present invention. As shown in fig. 3, the two connection portions 112 of each connection plate 110 are attached to each other, and the adjacent two cells 210 connected by the connection members are conducted.

Specifically, the two connection portions 112 on both sides of the two connection plates 110 stacked by bending the bending portion 111 itself are bent to form a certain angle. Fig. 4 is a schematic structural diagram of connection between a connection portion and a battery cell according to an embodiment of the present invention. Fig. 5 is a schematic view of one of the views in fig. 4. As shown in fig. 4 and fig. 5, the included angle between the two connection portions 112 is adjusted so that the two connection portions 112 face two different directions, and the two connection portions 112 and the two electric cores 210 are respectively connected in the two different directions. Fig. 6 is a schematic structural diagram of bonding two connection parts according to an embodiment of the present invention. Fig. 7 is an enlarged partial schematic view at a in fig. 6. As shown in fig. 6 and fig. 7, after the two connection portions 112 and the two electric cores 210 are respectively connected firmly, the bending of the bending portion 111 is continuously adjusted to adjust the directions of the two bending portions 111, so that the two bending portions 111 are mutually attached in the horizontal direction, and the two electric cores 210 are driven to be aligned horizontally.

Since the direction of the two connection portions 112 can be adjusted by bending the bending portion 111, the connection between the two connection portions 112 and the two battery cells 210 in different directions can be achieved, and the direction of the two connection portions 112 can be adjusted, so that the two connection portions 112 can be attached in the same direction, and the two battery cells 210 can be driven to align in the same direction. Therefore, when the two electric cores 210 are aligned horizontally, the electric core connector 100 of the invention can connect the two electric cores 210 with the electric core connector 100 in the horizontal direction, so as to save the space in the thickness direction of the battery 200 and improve the space utilization rate of the automobile in the height direction of the automobile body.

Optionally, the plurality of cell connectors 100 is a plurality, and the plurality of cell connectors 100 are connected to a plurality of cells 210 disposed horizontally side by side. Specifically, since the plurality of cell connectors 100 are provided, when two cells 210 are connected by one cell connector 100 to achieve horizontal alignment of the two cells 210, the two cells 210 and one cell connector 100 are connected in the horizontal direction to form a common whole, and then another cell 210 and one of the connected whole cells 210 are connected by another cell connector 100, so as to achieve horizontal alignment of the plurality of cells 210, and the plurality of cells 210 and the cell connector 100 are connected in the horizontal direction.

Optionally, the bending portions 111 corresponding to the two connection plates 110 of the cell connector 100 have different bending radii, so that the bending portions 111 avoid each other during bending. Specifically, since the two connection plates 110 are stacked, and the two connection plates 110 have a certain thickness, when the bending portion 111 is bent, friction extrusion is easily generated in the process of bending the bending portion 111 by the connection plates 110 located on the inner layer and the outer layer, different stresses are generated at the bending portion, and cracking of the bending portion 111 occurs. The bending parts 111 corresponding to the two connecting plates 110 of the cell connector 100 are set to be different in bending radius, and in the bending process of the bending parts 111, the connecting plates 110 positioned on the inner layer and the outer layer can not generate friction or extrusion under the action of the different bending radii, so that the two connecting plates 110 are not damaged, and the bending parts 111 are not cracked.

As an alternative embodiment, the bending portion 111 has a circular arc shape. Specifically, since the bending portion 111 is in a circular arc shape, and the bending process of the bending portion 111 is a rotation motion, the bending portion 111 does not collide inside the bending portion 111 or between the bending portion 111 and the connecting portion 112 in the bending process, so that the two connecting portions 112 are not worn by bending of the bending portion 111, and the two connecting portions 112 can be connected with the two adjacent cells 210 normally.

Alternatively, the cell connector 100 is folded in half along its own midline to form two connection plates 110. Specifically, since the cell connector 100 is folded in half along its own center line to form two connection plates 110, the thickness of the two connection plates 110 is greater in the bending process of the bending portions 111 of the two connection plates 110, so that better bending performance can be provided, and hardening and cracking of the bending portions 111 are reduced.

As an alternative embodiment, the cell connector 100 has two protruding portions 120 in the unfolded state, the two protruding portions 120 are respectively located at two sides of the central line of the cell connector 100, and the two protruding portions 120 are opposite to each other with respect to the plate surface of the cell connector 100, and the protruding portions 120 are configured to form the bending portion 111 after the cell connector 100 is folded.

Specifically, since the cell connector 100 has two protrusions 120 in the unfolded state, after the cell connector 100 is folded, the two protrusions 120 form the bending portion 111, so that the two connection plates 110 do not collide with each other when the bending portion 111 is bent, and thus the two connection plates 110 are not damaged. Meanwhile, since the two protrusions 120 are respectively located at two sides of the center line of the battery cell connector 100, and the directions of the two protrusions 120 are opposite to the plate surface of the battery cell connector 100, after the battery cell connector 100 is folded, the two protrusions are changed along with the folding direction, so that the protrusions with opposite directions are folded into protrusions with the same directions in the unfolded state, and the folded portion 111 is further formed.

Optionally, the cell connector 100 has a groove 130, when the cell connector 100 is in the unfolded state, the groove 130 passes through the center line of the cell connector 100, and the extending direction of the groove 130 is perpendicular to the folding direction of the cell connector 100. Specifically, since the cell connector 100 has a certain thickness, the two connection plates 110 easily form a certain included angle at the folded position after being folded in half, so that the two connection plates 110 cannot be stacked. Through setting up recess 130 on electric core connecting piece 100, when electric core connecting piece 100 is in the expansion state, recess 130 passes through electric core connecting piece 100 self central line, and the direction of extension of recess 130 is perpendicular to the direction of electric core connecting piece 100 fifty percent discount, can make two connecting plates 110 do not produce the contained angle in fifty percent discount department after the fifty percent discount to make two connecting plates 110 range upon range of setting.

The invention provides a battery 200, which comprises a plurality of battery cells 210 and a connecting assembly 220, wherein the connecting assembly 220 comprises at least one battery cell connecting piece 100, and the battery cell connecting piece 100 is connected between the ends of two adjacent battery cells 210 in the length direction. Specifically, since the battery 200 includes a plurality of cells 210 and the connection assembly 220, the connection assembly 220 includes at least one cell connector 100, and the cell connector 100 is connected between the ends of the adjacent two cells 210 in the length direction, and can be connected between the plurality of cells 210 through the plurality of cell connectors 100, so that when the plurality of cells 210 are horizontally aligned, the plurality of cells 210 and the plurality of cell connectors 100 are connected in the horizontal direction.

Optionally, the plurality of electric cells 210 form at least one first electric cell group 211, each electric cell 210 in the first electric cell group 211 is sequentially arranged along a first horizontal direction, and the length direction of each electric cell 210 is along a second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction. The first horizontal direction is the X direction, i.e., the longitudinal direction of the battery 200, and the second horizontal direction is the Y direction, i.e., the width direction of the battery 200.

Fig. 8 is a schematic structural diagram of an arrangement manner of electric cells in a battery according to an embodiment of the present invention. As shown in fig. 8, since the plurality of electric cells 210 form at least one first electric cell group 211, each electric cell 210 in the first electric cell group 211 is sequentially arranged along the first horizontal direction, and the length direction of each electric cell 210 is along the second horizontal direction, and the second horizontal direction is perpendicular to the first horizontal direction, the plurality of first electric cell groups 211 can have a larger length in the first direction, and the number of the first electric cell groups 211 is reduced in the second direction, so that the connection between the plurality of first electric cell groups 211 and the plurality of electric cell connectors 100 in the second direction is simpler, the number of the electric cell connectors 100 used can be reduced, and the production cost of the electric cell connector 100 is saved.

Optionally, the plurality of cells 210 form at least one second cell group 212. Fig. 9 is a schematic structural diagram of another arrangement of battery cells in a battery according to an embodiment of the present invention. As shown in fig. 9, each of the cells 210 in the second cell group 212 is arranged along the second horizontal direction, and the length direction of the cell 210 is along the first horizontal direction. Specifically, since the plurality of electric cores 210 form at least one second electric core group 212, each electric core 210 in the second electric core group 212 is arranged along the second horizontal direction, and the length direction of each electric core 210 is along the first horizontal direction, the plurality of second electric core groups 212 can have smaller lengths in the second direction, so that the probability of the whole second electric core group 212 being failed when part of electric cores 210 in the second electric core group 212 are failed is reduced, the plurality of second electric core groups 212 are easier to solve when the failure occurs, and the later maintenance cost is reduced.

Optionally, the battery cell 210 includes a battery cell body 213 and a pole 214 disposed at an end of the battery cell body 213. Fig. 10 is a schematic structural diagram of a battery cell according to an embodiment of the present invention. As shown in fig. 10, the connection 112 of the cell connector 100 and the post 214 are welded. Specifically, the electric core 210 includes an electric core body 213 and a pole 214 disposed at an end of the electric core body 213, and the electric core body 213 is used as a core energy supply unit of the electric core 210 to provide electric energy for the electric core 210, and further provides electric energy for the battery 200. Since the connection parts 112 and the poles 214 of the cell connector 100 are welded, and the cell connector 100 can adjust the orientations of the two connection parts 112 by bending the bending parts 111, so as to realize the welding of the two connection parts 112 and the two poles 214 in different directions, and the alignment of the two connection parts 112 in the same horizontal direction, when the two poles 214 are aligned horizontally, the two poles 214 and the cell connector 100 are connected in the horizontal direction.

Alternatively, the two connection portions 112 include a first connection portion and a second connection portion, and both connection portions 112 include a first side wall proximate the pole 214 and a second side wall distal from the pole 214. The two electric cores 210 include a first electric core and a second electric core, and the two electric cores 210 each include a positive electrode column and a negative electrode column disposed on two sides of the electric core 210.

Specifically, the first side wall of the first connection portion and the second side wall of the first connection portion are welded with the positive electrode post of the first electric core, and the first side wall of the second connection portion and the second side wall of the second connection portion are welded with the negative electrode post of the second electric core, so that welding between the positive electrode post and the negative electrode post between the two connection portions 112 and the two electric cores 210 is simpler.

Optionally, the second side wall of the first connecting portion and the second side wall of the second connecting portion are both provided with through holes, the first side wall of the first connecting portion is welded with the positive pole of the first electric core through the through holes, the first side wall of the second connecting portion is welded with the negative pole of the second electric core through the through holes, and since the second side wall of the first connecting portion and the second side wall of the second connecting portion are both provided with through holes, the first side wall of the first connecting portion is welded with the positive pole of the first electric core through the through holes, the first side wall of the second connecting portion is welded with the negative pole of the second electric core through the through holes, so that the two connecting portions 112 can only be welded with the positive pole and the negative pole near one side of the pole 214, and the welding of the two connecting portions 112 with the positive pole and the negative pole is firmer, and falling is not easy to occur.

The connection process of the battery cell connector 100 and the battery 200 provided by the invention is as follows: the cell connector 100 includes a connecting plate 110, a protruding portion 120 and a groove 130 when in an unfolded state, the groove 130 passes through a central line of the cell connector 100, and an extending direction of the groove 130 is perpendicular to a folding direction of the cell connector 100, and the protruding portion 120 is configured to form a bending portion 111 after the cell connector 100 is folded. The battery 200 includes a plurality of cells 210 and at least one cell connector 100, and the cells 210 include a cell body 213 and a post 214 disposed at an end of the cell body 213.

The cell connector 100 is folded to form two connecting plates 110 that are stacked, the connecting plates 110 include a bending portion 111 and two connecting portions 112 that are symmetrically disposed at two sides of the bending portion 111, the two connecting portions 112 that are stacked are bent into a certain included angle through bending of the bending portion 111, and the included angle of bending of the two connecting portions 112 is adjusted, so that the two connecting portions 112 face two different directions, and the two connecting portions 112 are respectively connected with the poles 214 of the two adjacent cells 210.

Since the direction of the two connection portions 112 can be adjusted by bending the bending portion 111 itself, the connection between the two connection portions 112 and the two poles 214 in different directions can be achieved, and the direction of the two connection portions 112 can be adjusted, so as to achieve the lamination of the two connection portions 112 in the same direction, and simultaneously drive the two poles 214 to align in the same direction, and finally drive the two battery cells 210 to align in the same direction. Thus, when the two electric cores 210 are horizontally aligned, the two electric cores 210 are connected with the electric core connecting piece 100 in the horizontal direction, so that the space in the thickness direction of the battery 200 is saved, and the space utilization rate of the automobile in the height direction of the automobile body is improved.

In the description of the present invention, it should be understood that the terms "center", "length", "width", "thickness", "top", "bottom", "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "inner", "outer", "axial", "circumferential", etc. are used to indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, merely to facilitate description of the present invention and to simplify the description, and do not indicate or imply that the referred location or element must have a specific orientation, in a specific configuration and operation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, 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 present invention, unless explicitly specified and limited otherwise, the terms "mounted," "configured," "connected," "secured," "screwed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly through intermediaries, or in communication with each other or in interaction with each other, unless explicitly defined otherwise, the meaning of the terms described above in this application will be understood by those of ordinary skill in the art in view of the specific circumstances.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present invention, and not for limiting the same; although the invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the invention.

Claims

1. The battery cell connecting piece is characterized by being used for connecting two battery cells horizontally arranged side by side, the battery cell connecting piece is folded by itself to form two connecting plates which are arranged in a stacked mode, each connecting plate comprises a bending part and two connecting parts which are symmetrically arranged on two sides of the bending part, and the two connecting parts are respectively connected with the ends of the adjacent two battery cells in the length direction;

the bending part is configured to adjust the orientations of the two connecting parts at two sides of the bending part through bending of the bending part, so that the two connecting parts of each connecting plate are mutually attached, and the adjacent two battery cells connected by the connecting piece are conducted.

2. The cell connector according to claim 1, wherein the bending portions of the two connecting plates of the cell connector have different bending radii so that the bending portions are away from each other when bending.

3. The cell connector of claim 2, wherein the bent portion is circular arc-shaped.

4. A cell connector according to claim 3, wherein the cell connector is folded in half along its own midline to form two of the connection plates.

5. The cell connector of claim 4, wherein the cell connector has two protrusions in an expanded state, the two protrusions are located on two sides of a center line of the cell connector, and the two protrusions are opposite to each other with respect to a plate surface of the cell connector, and the protrusions are configured to form the bending portion after the cell connector is folded.

6. The cell connector of claim 5, wherein the cell connector has a groove, the groove passes through a center line of the cell connector itself when the cell connector is in a unfolded state, and an extending direction of the groove is perpendicular to a direction in which the cell connector is folded in half.

7. A battery comprising a plurality of cells and a connection assembly comprising at least one cell connector according to any one of claims 1-6, said cell connector being connected between lengthwise ends of adjacent cells.

8. The battery of claim 7, wherein a plurality of said cells form at least one first cell group, each of said cells in said first cell group being arranged in sequence along a first horizontal direction, and wherein a length direction of said cells is along a second horizontal direction, said second horizontal direction being perpendicular to said first horizontal direction.

9. The battery of claim 8, wherein a plurality of the cells form at least one second cell group, each of the cells in the second cell group being aligned in a second horizontal direction and the length of the cells being in a first horizontal direction.

10. The battery of claim 9, wherein the cell comprises a cell body and a post disposed at an end of the cell body, the connection portion of the cell connector and the post being welded.