CN221009178U - Current collecting assembly and battery cell - Google Patents

Abstract

The utility model discloses a current collecting assembly and a current collecting assembly, wherein the current collecting assembly comprises: the first current collector, the second current collector and the insulating piece are all in annular structures, the insulating piece is sleeved on the outer side of the first current collector, the second current collector is sleeved on the outer side of the insulating piece, and the insulating piece is located between the first current collector and the second current collector so that the first current collector and the second current collector are spaced. Therefore, according to the current collecting assembly provided by the utility model, the first current collecting piece and the second current collecting piece are integrated into a whole, so that the current collecting assembly is suitable for the battery cells with the first electrode lug and the second electrode lug positioned on the same side, and the current collecting assembly can be simultaneously connected with the first electrode lug and the second electrode lug in a matched manner, and the assembly efficiency of the battery cells is improved.

Description

Current collecting assembly and battery cell

Technical Field

The present utility model relates to the field of battery cells, and more particularly, to a current collecting assembly and a battery cell having the same.

Background

In the related art, the first current collector and the second current collector in the existing battery monomer are of split type structures, and usually an operator needs to connect the first current collector with the first tab and then connect the second current collector with the second tab, so that the assembling steps of the battery monomer are complex, and the assembling efficiency of the battery monomer is low.

Disclosure of utility model

The present utility model aims to solve at least one of the technical problems existing in the prior art. Therefore, an object of the present utility model is to provide a current collecting assembly, which is suitable for the battery cells with the first tab and the second tab at the same side, and can improve the assembly efficiency of the battery cells.

A header assembly according to the present utility model includes:

The first current collector, the second current collector and the insulating piece are in annular structures, the insulating piece is sleeved on the outer side of the first current collector, the second current collector is sleeved on the outer side of the insulating piece, and the insulating piece is positioned between the first current collector and the second current collector so as to enable the first current collector and the second current collector to be spaced;

according to the current collecting assembly, the first current collecting piece and the second current collecting piece are integrated into a whole, the first current collecting piece is suitable for being connected with the first tab, the second current collecting piece is suitable for being connected with the second tab, so that the current collecting assembly is suitable for battery cells with the first tab and the second tab on the same side, and the current collecting assembly can be simultaneously connected with the first tab and the second tab in a matched mode, and the assembly efficiency of the battery cells is improved.

In some examples of the utility model, the first current collector is adapted to connect with a first tab of a battery cell and the second current collector is adapted to connect with a second tab of the battery cell.

In some examples of the utility model, the first current collector has at least one first through hole adapted to fit the first tab; and/or the second current collector has at least one second through hole adapted to fit the second tab.

In some examples of the utility model, the first current collector has a plurality of first through holes; and/or the second current collector is provided with a plurality of second through holes, and the plurality of first through holes and/or the plurality of second through holes are arranged along the circumferential direction of the current collecting assembly.

In some examples of the utility model, the plurality of first through holes and the plurality of second through holes are disposed in one-to-one correspondence along a radial direction of the current collecting assembly.

In some examples of the utility model, the first current collector is formed with a first countersink, and a bottom wall of the first countersink is formed with a first through hole.

In some examples of the utility model, the second current collector is formed with a second countersink, and a bottom wall of the second countersink is formed with a second through hole.

In some examples of the utility model, the inner peripheral wall of the insulator is formed with a first connection structure, the outer peripheral wall of the first current collector is formed with a second connection structure, and the first connection structure and the second connection structure are fitted in a mating manner.

In some examples of the present utility model, the outer peripheral wall of the insulator is formed with a third connection structure, the inner peripheral wall of the second current collector is formed with a fourth connection structure, and the third connection structure and the fourth connection structure are fitted in cooperation.

In some examples of the utility model, the first current collector has a connection portion adapted to connect with a cover plate of the battery cell.

The battery cell according to the present utility model includes:

The electrode assembly is arranged in the mounting cavity and is provided with a first tab and a second tab;

The current collecting assembly is the current collecting assembly, the current collecting assembly is arranged in the mounting cavity, the first current collecting piece and the second current collecting piece are respectively connected with the first electrode lug and the second electrode lug, the first current collecting piece is connected with one of the positive electrode post and the negative electrode post of the battery cell, and the second current collecting piece is connected with the other one of the positive electrode post and the negative electrode post.

Additional aspects and advantages of the utility model will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the utility model.

Drawings

The foregoing and/or additional aspects and advantages of the utility model will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:

fig. 1 is an exploded view of a battery cell according to an embodiment of the present utility model;

fig. 2 is an exploded view of a header assembly according to an embodiment of the present utility model;

fig. 3 is a top view of a header assembly according to an embodiment of the present utility model;

fig. 4 is a cross-sectional view at A-A in fig. 3.

Reference numerals:

A current collecting assembly 100;

A first current collector 1; a first through hole 10; a first sink 11; a second connection structure 13; a connection portion 14;

a first surface 1a; a second surface 1b;

A second current collector 2; a second through hole 20; a second sink 21; a fourth connection structure 23;

A third surface 2a; a fourth surface 2b;

An insulating member 3; the first connection structure 31; a third connection structure 32;

a battery cell 200; a mounting cavity 201;

a housing 211;

an electrode assembly 221; a first tab 222; a second tab 223;

A cover plate 231; a first pole 232; a second pole 233.

Detailed Description

Embodiments of the present utility model are described in detail below, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to like or similar elements or elements having like or similar functions throughout. The embodiments described below by referring to the drawings are illustrative only and are not to be construed as limiting the utility model.

Hereinafter, a current collecting assembly 100 according to an embodiment of the present utility model will be described with reference to fig. 1 to 4, and the current collecting assembly 100 may be applied to a battery cell 200, but the present utility model is not limited thereto, and the current collecting assembly 100 may be applied to other devices where the current collecting assembly 100 is required to be disposed, and the present utility model will be described by taking the current collecting assembly 100 applied to the battery cell 200 as an example.

As shown in fig. 1 to 4, the current collecting assembly 100 according to the embodiment of the present utility model includes a first current collecting member 1, a second current collecting member 2, and an insulator 3, each of the second current collecting member 2 and the insulator 3 is configured in a ring shape, the insulator 3 is sleeved outside the first current collecting member 1, the second current collecting member 2 is sleeved outside the insulator 3, and the insulator 3 is positioned between the first current collecting member 1 and the second current collecting member 2 to space the first current collecting member 1 and the second current collecting member 2 such that the first current collecting member 1 and the second current collecting member 2 are integrated.

In some embodiments, the electrode assembly 221 of the battery cell 200 has a first tab 222 and a second tab 223, and the first tab 222 and the second tab 223 are both located at one end of the electrode assembly 221, one of the first tab 222 and the second tab 223 is configured as a positive tab, the other of the first tab 222 and the second tab 223 is configured as a negative tab, and in some embodiments of the present utility model, the first tab 222 is configured as a positive tab, the second tab 223 is configured as a negative tab, and by providing that the first tab 222 and the second tab 223 are both located at one end of the electrode assembly 221, the current flowing path is effectively shortened, thereby facilitating the reduction of the resistance of the electrode assembly 221 and the improvement of the service performance of the battery cell 200.

In some embodiments, the first current collector 1 is adapted to be connected with the first tab 222 of the battery cell 200, the second current collector 2 is adapted to be connected with the second tab 223 of the battery cell 200, both the first current collector 1 and the second current collector 2 are made of a metal material, such that the first current collector 1 may be electrically connected with the first tab 222, the second current collector 2 may be electrically connected with the second tab 223, such that the current collector assembly 100 may be electrically connected with the electrode assembly 221, and the insulator 3 may be made of an insulating material, such as: rubber, plastic, etc., and in some embodiments of the present utility model, the insulating member 3 is made of plastic such that the insulating member 3 has insulating properties, and since the insulating member 3 is positioned between the first current collector 1 and the second current collector 2 and the insulating member 3 serves to space the first current collector 1 and the second current collector 2, contact between the first current collector 1 and the second current collector 2 is avoided, and conductive contact between the first current collector 1 and the second current collector 2 is effectively avoided, so that use stability of the battery cell 200 is ensured.

Compared with the prior art, the current collecting assembly 100 comprises the first current collecting piece 1 and the second current collecting piece 2, the first current collecting piece 1 and the second current collecting piece 2 are integrated into a whole, and the first current collecting piece 1 is connected with the first tab 222, and the second current collecting piece 2 is connected with the second tab 223, so that the current collecting assembly 100 can be connected with the first tab 222 and the second tab 223 at the same time, and the assembly efficiency is improved.

In some embodiments, as shown in fig. 1, the structure of the electrode assembly 221 is configured in a cylindrical shape, for example, the first current collector 1 is configured in a circular plate-shaped structure, and the second current collector 2 and the insulator 3 are each configured in a circular ring shape, so that the first current collector 1, the second current collector 2, and the insulator 3 cooperate together to form the circular current collector assembly 100, such that the current collector assembly 100 is adapted to be cooperatively connected with the electrode assembly 221. It should be noted that, in some embodiments of the present utility model, the battery cell 200 is configured as a cylindrical battery, and the structure of the electrode assembly 221 is configured as a cylindrical battery, but the present utility model is not limited thereto, and the battery cell 200 may be configured as a cylindrical battery having other shapes, for example, the battery cell 200 may be configured as a square battery, the structure of the electrode assembly 221 may be configured as a prismatic shape, and accordingly, the first current collector 1 may be configured as a square plate structure, and the second current collector 2 and the insulator 3 may be configured as square rings, so that the current collecting assembly 100 is suitable for being connected with the electrode assembly 221 in a mating manner.

Therefore, according to the current collecting assembly 100 of the embodiment of the present utility model, the first current collecting member 1 is suitable for being connected with the first tab 222, the second current collecting member 2 is suitable for being connected with the second tab 223, so that the current collecting assembly 100 is suitable for the battery cell 200 with the first tab 222 and the second tab 223 located at the same side, and the first current collecting member 1 and the second current collecting member 2 are integrated into a whole, so that the current collecting assembly 100 can be simultaneously connected with the first tab 222 and the second tab 223 in a matching way, and the assembly efficiency is improved.

In some embodiments of the present utility model, as shown in fig. 1, the first current collector 1 has at least one first through hole 10, the first through hole 10 is adapted to be fitted with the first tab 222, and/or the second current collector 2 has at least one second through hole 20, the second through hole 20 is adapted to be fitted with the second tab 223, it being understood that the first current collector 1 has the first through hole 10, the second current collector 2 has the second through hole 20, or the first current collector 1 has the first through hole 10 or the second current collector 2 has the second through hole 20. In some embodiments of the present utility model, as shown in fig. 1, the first current collector 1 has the first through holes 10, and the second current collector 2 has the second through holes 20 are exemplified, where the electrode assembly 221 has six first tabs 222 and six second tabs 223 are exemplified, and in the current collecting assembly 100, the first current collector 1 has six first through holes 10 and six first through holes 10, and in the process of the mating connection of the electrode assembly 221 and the current collecting assembly 100, the six first tabs 222 are respectively in one-to-one correspondence with the six first through holes 10, and the six second tabs 223 are respectively in one-to-one correspondence with the six second through holes 20, so that each first tab 222 is respectively disposed through the corresponding first through hole 10, and each second tab 223 is respectively disposed through the corresponding second through hole 20. In other embodiments, the electrode assembly 221 may have only one first tab 222 and one second tab 223, and then in the current collecting assembly 100, the first current collecting member 1 has one first through hole 10 and one first through hole 10, and in the process of mating connection of the electrode assembly 221 and the current collecting assembly 100, the first tab 222 is correspondingly mated with the first through hole 10, and the second tab 223 is correspondingly mated with the second through hole 20.

In some embodiments, in the process of connecting the electrode assembly 221 and the current collecting assembly 100 in a matching manner, the first tab 222 is inserted into the first current collecting member 1 through the first through hole 10, the second tab 223 is inserted into the second current collecting member 2 through the second through hole 20, and then the first current collecting member 1 can be bent to make the first tab 222 contact with the first current collecting member 1, and the second current collecting member 2 can be bent to make the second tab 223 contact with the second current collecting member 2, which is beneficial to not only increasing the contact area between the first tab 222 and the first current collecting member 1, but also increasing the contact area between the second tab 223 and the second current collecting member 2, and avoiding the protrusion of the first tab 222 and the second tab 223 from the current collecting member 100, so that the axial dimension of the electrode assembly 221 is beneficial to be reduced, and the situation that the electrode assembly 221 occupies the internal space of the battery cell 200 due to the protrusion of the first tab 222 and the second tab 223 from the current collecting member 100 is beneficial to further improving the energy density of the battery cell 200.

In some embodiments of the present utility model, as shown in fig. 1, the first current collector 1 has a plurality of first through holes 10, and/or the second current collector 2 has a plurality of second through holes 20, and the plurality of first through holes 10 and/or the plurality of second through holes 20 are arranged along the circumferential direction of the current collecting assembly 100, it is also understood that the first current collector 1 has a plurality of first through holes 10, the second current collector 2 has a plurality of second through holes 20, or the first current collector 1 has one first through hole 10, the second current collector 2 has a plurality of second through holes 20, or the first current collector 1 has a plurality of first through holes 10, the second current collector 2 has one second through hole 20.

As shown in fig. 1, in some embodiments of the present utility model, the electrode assembly 221 has six first tabs 222 and six second tabs 223, the six first tabs 222 and the six second tabs 223 are arranged along the circumferential direction of the electrode assembly 221, for use in the current collecting assembly 100 cooperatively connected with the electrode assembly 221, the first current collector 1 has six first through holes 10, the second current collector 2 has six second through holes 20, and the six first through holes 10 and the six second through holes 20 are all arranged along the circumferential direction of the current collecting assembly 100, and the six first through holes 10 are respectively in one-to-one correspondence with the six first tabs 222 and the six second through holes 20 are respectively in one-to-one correspondence with the six second tabs 223, so that during the process of cooperatively connecting the electrode assembly 221 with the current collecting assembly 100, the plurality of first tabs 222 can pass through the first current collector 1 through the corresponding first through holes 10, the plurality of second tabs 223 can pass through the second current collector 2 through the corresponding second through holes 20, respectively, so that the six first through holes 10 and the six second through holes 223 can be respectively arranged along the axial direction of the electrode assembly 221 and the electrode assembly 221 can be conveniently assembled with the current collecting assembly 100.

In some embodiments of the present utility model, as shown, the plurality of first through holes 10 and the plurality of second through holes 20 are disposed in one-to-one correspondence in the radial direction of the current collecting assembly 100. As shown in fig. 1, in some embodiments of the present utility model, two adjacent first tabs 222 and second tabs 223 are disposed opposite to each other along the radial direction of the electrode assembly 221, it may also be understood that the front projection surface of the first tab 222 disposed opposite to each other coincides with the front projection surface of the second tab 223 along the radial direction of the electrode assembly 221, and two adjacent first through holes 10 and second through holes 20 are disposed opposite to each other along the radial direction of the current collecting assembly 100, so that the plurality of first through holes 10 and the plurality of first tabs 222 are in one-to-one correspondence, the plurality of second through holes 20 and the plurality of second tabs 223 are in one-to-one correspondence, so that the plurality of first tabs 222 may pass through the first current collecting member 1 through the corresponding first through holes 10, and the plurality of second tabs 223 may pass through the second current collecting member 2 through the corresponding second through holes 20, respectively, so that the first tabs 222 and the second tabs 223 may pass through the current collecting assembly 100, and the electrode assembly 221 and the current collecting assembly 100 are in the mating connection, and the mating connection of the electrode assembly 221 and the current collecting assembly 100 are facilitated.

In other embodiments of the present utility model, the plurality of first through holes 10 and the plurality of second through holes 20 are staggered in the radial direction of the current collecting assembly 100. For example, two adjacent first tabs 222 and second tabs 223 are staggered along the radial direction of the electrode assembly 221, it may also be understood that the orthographic projection surface of the staggered first tabs 222 is not overlapped with the orthographic projection surface of the second tabs 223 along the radial direction of the electrode assembly 221, and two adjacent first through holes 10 and second through holes 20 are staggered along the radial direction of the current collecting assembly 100, and a plurality of first tabs 222 are adapted to be in one-to-one correspondence with a plurality of first through holes 10, a plurality of second tabs 223 are adapted to be in one-to-one correspondence with a plurality of second through holes 20 along the axial direction of the electrode assembly 221, in the process of matching and connecting the electrode assembly 221 and the current collecting assembly 100, the plurality of first through holes 10 and the plurality of first tabs 222 are in one-to-one correspondence, the plurality of second through holes 20 and the plurality of second tabs 223 are in one-to-one correspondence, so that the plurality of first tabs 222 can respectively pass through the first current collecting member 1 through the corresponding first through holes 10, the plurality of second tabs 223 can respectively pass through the second current collecting member 2 through the corresponding second through holes 20, so that the first tabs 222 and the second tabs 223 can both pass through the current collecting assembly 100, the electrode assembly 221 and the current collecting assembly 100 are conveniently matched and connected, and the assembly efficiency of the electrode assembly 221 and the current collecting assembly 100 is improved.

In some embodiments of the present utility model, as shown in fig. 2-4, the first current collector 1 is formed with the first countersink 11, the bottom wall of the first countersink 11 is formed with the first through hole 10, after the first tab 222 is penetrated through the first current collector 1 by the first through hole 10, the first tab 222 may be bent and deformed, so that a part of the structure of the first tab 222 is located in the first countersink 11 and connected with the bottom wall of the first countersink 11, which not only can increase the contact area between the first tab 222 and the first current collector 1, but also can avoid the protrusion of the first tab 222 and the first current collector 1, so that the axial dimension of the electrode assembly 221 is reduced, the situation that the electrode assembly 221 occupies the internal space dimension of the battery cell 200 due to the protrusion of the first tab 222 on the current collector assembly 100 is avoided, and further, the energy density of the battery cell 200 is improved.

As shown in fig. 1 and fig. 2, along the axial direction of the first current collector 1, the first current collector 1 has a first surface 1a and a second surface 1b that are oppositely disposed, when the current collector 100 is in fit connection with the electrode assembly 221, the second surface 1b is disposed towards the electrode assembly 221, the first surface 1a is located at a side far away from the electrode assembly 221, the first recess 11 is configured as a groove structure that is recessed from the first surface 1a towards the second surface 1b, so that during the fit connection between the current collector 100 and the electrode assembly 221, the first tab 222 passes through the first through hole 10 from the side of the second surface 1b, and then the first tab 222 is bent, so that the first tab 222 is connected with the bottom wall of the first recess 11, so that a part of the structure of the first tab 222 is located in the first recess 11, thereby avoiding that the first tab 222 protrudes from the first surface 1a, so that the axial dimension of the electrode assembly 221 is reduced, and the situation that the inner dimension 200 of the battery cell 221 is increased due to the first tab 222 protruding from the current collector 100 is avoided, and the cell density is further facilitated.

In addition, through setting up first heavy groove 11 to use the welding equipment who is used for welding first utmost point ear 222 and first collector 1 discerns first heavy groove 11, make welding equipment can discern the welded position of first utmost point ear 222 and first collector 1, thereby can realize that welding equipment carries out automatic weld's effect to first utmost point ear 222 and first collector 1, avoid artifical affirmation welded position of first utmost point ear 222 and first collector 1, promote production efficiency.

In some embodiments of the present utility model, as shown in fig. 2-4, the second current collector 2 is formed with the second current collector 21, the bottom wall of the second current collector 21 is formed with the second through hole 20, after the second tab 223 is penetrated through the second current collector 2 by the second through hole 20, the second tab 223 may be bent and deformed, so that a part of the structure of the second tab 223 is located in the second current collector 21 and connected with the bottom wall of the second current collector 21, not only the contact area between the second tab 223 and the second current collector 2 may be increased, but also the protrusion of the second tab 223 and the second current collector 2 may be avoided, so that the axial dimension of the electrode assembly 221 may be reduced, and the condition that the electrode assembly 221 occupies the internal space of the battery cell 200 due to the protrusion of the second tab 223 on the current collector assembly 100 may be avoided, thereby being beneficial for improving the energy density of the battery cell 200.

As shown in fig. 1 and 2, in the axial direction of the second current collector 2, the second current collector 2 has a third surface 2a and a fourth surface 2b that are disposed opposite to each other, when the current collector 100 is connected with the electrode assembly 221 in a matching manner, the fourth surface 2b is disposed towards the electrode assembly 221, the third surface 2a is located at a side far away from the electrode assembly 221, the second recess 21 is configured as a recess structure from the third surface 2a towards the fourth surface 2b, so that during the process of connecting the current collector 100 with the electrode assembly 221 in a matching manner, the second tab 223 passes through the second through hole 20 from the side of the fourth surface 2b, and then the second tab 223 is bent, so that the second tab 223 is connected with the bottom wall of the second recess 21, so that a part of the structure of the second tab 223 is located in the second recess 21, and the second tab 223 is prevented from protruding from the third surface 2a, so that the axial dimension of the electrode assembly 221 is reduced, and the condition that the battery cell 200 occupying the internal dimension of the battery assembly 221 due to the protrusion of the second tab 223 from the current collector 100 is avoided, and the cell density is further beneficial.

In addition, through setting up second heavy groove 21 to use the welding equipment who is used for welding second lug 223 and second collector 2 discerns second heavy groove 21, make welding equipment can discern the welded position of second lug 223 and second collector 2, thereby can realize that welding equipment carries out automatic weld's effect to second lug 223 and second collector 2, avoid artifical affirmation welded position of second lug 223 and second collector 2, promote production efficiency.

In some embodiments of the present utility model, as shown in fig. 2 and 4, the inner peripheral wall of the insulator 3 is formed with the first connection structure 31, the outer peripheral wall of the first current collector 1 is formed with the second connection structure 13, the first connection structure 31 and the second connection structure 13 are assembled in cooperation, and the effect that the insulator 3 is sleeved outside the first current collector 1 is achieved by the first connection structure 31 and the second connection structure 13 being assembled in cooperation.

In some embodiments of the present utility model, the first connection structure 31 is configured as one of a boss and a groove, and the second connection structure 13 is configured as the other of the boss and the groove, and the boss is adapted to be mounted in the groove, so as to achieve the effect of the mating fitting of the first connection structure 31 and the second connection structure 13. As shown in fig. 4, the first connection structure 31 is configured as a groove, and the second connection structure 13 is configured as a boss, which is located in the groove, so that the effect of the mating assembly of the first connection structure 31 and the second connection structure 13 is achieved, thereby achieving the restriction of the relative positions of the insulating member 3 and the first current collector 1, so that the insulating member 3 is reliably sleeved outside the first current collector 1. As shown in fig. 4, in some embodiments, the second connection structure 13 is configured to have a cross section similar to an "L" type boss structure, and accordingly, the first connection structure 31 is configured to be a groove adapted to the second connection structure 13, so that the first connection structure 31 and the second connection structure 13 are adapted to be in a limited fit with the second connection structure 13, so that the relative positions of the insulator 3 and the first current collector 1 are limited, the risk of the insulator 3 and the first current collector 1 being separated relatively is reduced, and the insulator 3 is reliably sleeved on the outer side of the first current collector 1.

In some embodiments of the present utility model, as shown in the drawings, the outer circumferential wall of the insulator 3 is formed with the third connection structure 32, the inner circumferential wall of the second current collector 2 is formed with the fourth connection structure 23, the third connection structure 32 and the fourth connection structure 23 are assembled in a matched manner, and the effect that the first current collector 1 is sleeved outside the insulator 3 is achieved through the matched assembly of the third connection structure 32 and the fourth connection structure 23.

In some embodiments of the present utility model, the third connection structure 32 is configured as one of a boss and a groove, and the fourth connection structure 23 is configured as the other of a boss and a groove, and the boss is adapted to be mounted in the groove, so as to achieve the effect of the mating fitting of the third connection structure 32 and the fourth connection structure 23. As shown in fig. 4, the third connection structure 32 is configured as a groove, and the fourth connection structure 23 is configured as a boss located in the groove, so that the effect of the mating assembly of the third connection structure 32 and the fourth connection structure 23 is achieved, thereby achieving the restriction of the relative positions of the second current collector 2 and the insulator 3, so that the second current collector 2 is reliably sleeved outside the insulator 3. As shown in fig. 4, in some embodiments, the fourth connection structure 23 is configured to have a cross-section similar to an "L" shaped boss structure, and accordingly, the third connection structure 32 is configured to be a groove adapted to the fourth connection structure 23, so that the third connection structure 32 and the fourth connection structure 23 are adapted to be in a limit fit with the fourth connection structure 23, so that the relative positions of the second current collector 2 and the insulator 3 are limited, and the risk of the second current collector 2 and the insulator 3 being separated relatively is reduced, so that the second current collector 2 is reliably sleeved outside the insulator 3.

In some embodiments of the present utility model, as shown in fig. 1 to 4, the first current collector 1 has a connection part 14, the connection part 14 is adapted to be connected with a cap plate 231 of the battery cell 200, the cap plate 231 includes a first electrode part 232 and a second electrode part 233, which are connected in an insulating manner, the first electrode part 232 is adapted to be connected with the connection part 14, and the second electrode part 233 is adapted to be connected with the second current collector 2, as shown in fig. 1, in some embodiments of the present utility model, the first current collector 1 is connected with the first tab 222 configured as a positive electrode tab, such that the first electrode part 232 is configured as a positive electrode post of the battery cell 200, and the second current collector 2 is connected with the second tab 223 configured as a negative electrode tab, such that the second electrode part 233 is configured as a negative electrode post of the battery cell 200. As shown in fig. 1, in some embodiments of the present utility model, the connection portion 14 is configured as a cylinder, and the connection portion 14 is disposed on the first surface 1a, and the effect of electrically connecting the first current collector 1 and the cover plate 231 is achieved through the first pole 232 of the connection portion 14.

The battery cell 200 according to the embodiment of the present utility model includes a case 211, a cap plate 231, an electrode assembly 221, and a current collecting assembly 100, the cap plate 231 and the case 211 being connected to define a mounting cavity 201, the electrode assembly 221 being mounted in the mounting cavity 201 and having a first tab 222 and a second tab 223, the current collecting assembly 100 being the current collecting assembly 100 of the above embodiment, the current collecting assembly 100 being mounted in the mounting cavity 201, the first current collector 1 and the second current collector 2 being connected to the first tab 222 and the second tab 223, respectively, and the first current collector 1 being connected to one of the positive electrode post and the negative electrode post of the battery cell 200, and the second current collector 2 being connected to the other of the positive electrode post and the negative electrode post.

In some embodiments, as shown in fig. 1, the second pole 233 is located at the outer side of the first pole 232 in the radial direction of the cap plate 231, and the second pole 233 is connected with the case 211 to achieve the effect of fixedly connecting the cap plate 231 and the case 211, and the current collecting assembly 100 is mounted in the mounting cavity 201, and the second current collector 2 is adapted to be connected with the case 211 to achieve the effect of connecting the second current collector 2 with the second pole 233, so that when the first current collector 1 is connected with the first pole 222 configured as a positive pole tab, the first pole 232 is configured as a positive pole of the battery cell 200, so that when the second current collector 2 is connected with the second pole 223 configured as a negative pole tab, the second pole 233 is configured as a negative pole of the battery cell 200, so that the first current collector 1 is connected with one of the positive pole and the negative pole of the battery cell 200, and the second current collector 2 is connected with the other of the positive pole and the negative pole.

In addition, with the battery cell 200 of the current collecting assembly 100 according to the embodiment of the utility model, the first tab 222 and the second tab 223 of the electrode assembly 221 can be disposed on the same side of the electrode assembly 221, compared with the prior art, the axial dimension of the electrode assembly 221 is optimized, so that the space occupied by the electrode assembly 221 in the installation cavity 201 is reduced, the space utilization rate of the installation cavity 201 is improved, the electrode assembly 221 with larger dimension can be disposed in the installation cavity 201 with a certain space, which is beneficial to improving the energy density of the battery cell 200, so as to improve the performance of the battery cell 200, and when the current collecting assembly 100 is connected with the electrode assembly 221 in a matched manner, the first tab 222 is folded and mounted on the first sink 11, and the second tab 223 is folded and mounted on the second sink 21, so that the situation that the electrode assembly 221 occupies the installation cavity 201 due to the protrusion of the first tab 222 and the second tab 223 on the current collecting assembly 100 is avoided, the space utilization rate of the installation cavity 201 is improved, and the energy density of the battery cell 200 is further improved.

In the description of the present specification, reference to the terms "one embodiment," "some embodiments," "illustrative embodiments," "examples," "specific examples," or "some examples," etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the utility model. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiments or examples. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present utility model have been shown and described, it will be understood by those of ordinary skill in the art that: many changes, modifications, substitutions and variations may be made to the embodiments without departing from the spirit and principles of the utility model, the scope of which is defined by the claims and their equivalents.

Claims (11)

1. A current collecting assembly, comprising:

The first current collector, the second current collector and the insulator are all constructed to be annular, the insulator cover is located the outside of first current collector, the second current collector cover is located the outside of insulator, the insulator is located between first current collector and the second current collector so that first current collector and second current collector are spaced apart.

2. The current collector assembly of claim 1 wherein the first current collector is adapted to connect with a first tab of a battery cell and the second current collector is adapted to connect with a second tab of the battery cell.

3. The current collector assembly of claim 2 wherein the first current collector has at least one first through hole adapted to fit the first tab; and/or the second current collector has at least one second through hole adapted to fit the second tab.

4. The manifold assembly of claim 3, wherein the first manifold has a plurality of first through holes; and/or the second current collector is provided with a plurality of second through holes, and the plurality of first through holes and/or the plurality of second through holes are arranged along the circumferential direction of the current collecting assembly.

5. The manifold assembly of claim 4, wherein a plurality of said first through holes and a plurality of said second through holes are disposed in one-to-one correspondence along a radial direction of said manifold assembly.

6. The manifold assembly of claim 3, wherein said first manifold is formed with a first countersink, and wherein a bottom wall of said first countersink is formed with said first through hole.

7. A manifold assembly according to claim 3, wherein the second manifold is formed with a second countersink, the bottom wall of the second countersink being formed with the second through hole.

8. The current collector assembly of claim 1, wherein the inner peripheral wall of the insulator is formed with a first connection structure and the outer peripheral wall of the first current collector is formed with a second connection structure, the first and second connection structures being cooperatively assembled.

9. The current collector assembly of claim 1 wherein the outer peripheral wall of the insulator is formed with a third connection structure and the inner peripheral wall of the second current collector is formed with a fourth connection structure, the third and fourth connection structures being matingly assembled.

10. The current collector assembly of any of claims 1-9, wherein the first current collector has a connection portion adapted to connect with a cover plate of a battery cell.

11. A battery cell, comprising:

The electrode assembly is arranged in the mounting cavity and is provided with a first tab and a second tab;

A current collecting assembly according to any one of claims 1 to 10, wherein the current collecting assembly is mounted in the mounting cavity, the first current collecting member and the second current collecting member are respectively connected with the first tab and the second tab, the first current collecting member is connected with one of the positive electrode post and the negative electrode post of the battery cell, and the second current collecting member is connected with the other of the positive electrode post and the negative electrode post.