CN218101633U - Battery current collecting disc and battery - Google Patents

Abstract

The utility model relates to a battery technology field specifically is about a battery current collector and battery, battery current collector are used for electric connection electric core and utmost point post subassembly, battery current collector includes: the current collecting disc comprises a current collecting disc body and a cantilever, wherein the current collecting disc body comprises a first connecting area and a second connecting area, the first connecting area is used for connecting the pole assembly, and the second connecting area is provided with a cantilever hole penetrating through the current collecting disc body; the cantilever with the current collecting plate main part is connected and is located the cantilever hole, the cantilever with have the clearance between the current collecting plate main part, the cantilever is used for connecting the electric core. The connection degree of difficulty of electric core and utmost point post subassembly when can reducing the assembly promotes the convenience of battery assembly to first connection region connection utmost point post subassembly in the battery current collector dish sets up in the second connection region and current collector dish main part has gapped cantilever, connects electric core through the cantilever, can release the stress of battery current collector dish effectively.

Description

Battery current collecting disc and battery

Technical Field

The disclosure relates to the technical field of batteries, in particular to a battery current collecting disc and a battery.

Background

With the development and progress of technology, electric vehicles are increasingly used. A battery pack is provided in an electric vehicle for storing electric energy and supplying energy to the electric vehicle. The battery pack is generally provided with a plurality of batteries, and the batteries are provided with poles and battery cores, wherein the poles are connected with the battery cores. However, when assembling, it is difficult to directly connect the pole and the battery cell.

It is noted that the information disclosed in the above background section is only for enhancement of understanding of the background of the present disclosure and therefore may include information that does not constitute prior art that is already known to a person of ordinary skill in the art.

Disclosure of Invention

The purpose of the present disclosure is to provide a battery current collecting plate and a battery, so as to improve the convenience of battery assembly at least to a certain extent.

According to an aspect of the present disclosure, there is provided a battery current collecting tray for electrically connecting a cell and a pole assembly, the battery current collecting tray comprising:

the current collecting disc main body comprises a first connecting area and a second connecting area, the first connecting area is used for connecting the pole assembly, and the second connecting area is provided with a cantilever hole penetrating through the current collecting disc main body;

the cantilever with the current collecting plate main part is connected and is located the cantilever hole, the cantilever with have the clearance between the current collecting plate main part, the cantilever is used for connecting electric core.

The embodiment of the disclosure provides a battery current collecting disc, which is used for connecting an electric core and a pole column assembly, can reduce the connection difficulty of the electric core and the pole column assembly during assembly, and improves the convenience of battery assembly. And first joining region connection utmost point post subassembly in the battery current collector dish sets up in the second joining region and has gapped cantilever with the current collector dish main part, connects electric core through the cantilever, can release the stress of battery current collector dish effectively, thereby avoids stress concentration to avoid stress concentration to cause the damage to the battery current collector dish, has promoted the yields of battery.

According to another aspect of the present disclosure, there is provided a battery including the above-described battery current collecting plate.

The battery provided by the embodiment of the disclosure connects the battery core and the pole post assembly through the battery current collecting disc in the battery, so that the connection difficulty of the battery core and the pole post assembly during assembly can be reduced, and the convenience of battery assembly is improved. And first joining region connects utmost point post subassembly in the battery current collector, sets up in the second joining region and has gapped cantilever with battery current collector main part, connects the electric core through the cantilever, can release the stress of battery current collector effectively, thereby avoids stress concentration to avoid stress concentration to cause the damage to battery current collector, has promoted the yields of battery.

It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and together with the description, serve to explain the principles of the disclosure. It should be apparent that the drawings in the following description are merely examples of the disclosure and that other drawings may be derived by those of ordinary skill in the art without inventive effort.

Fig. 1 is a partial cross-sectional view of a battery provided in accordance with an exemplary embodiment of the present disclosure;

fig. 2 is a schematic view of a battery current collecting plate provided in an exemplary embodiment of the present disclosure;

fig. 3 is a schematic view of a pole assembly provided in an exemplary embodiment of the present disclosure;

fig. 4 is a cross-sectional view of a pole assembly provided in an exemplary embodiment of the present disclosure;

fig. 5 is a partial cross-sectional view of another battery provided by an exemplary embodiment of the present disclosure;

FIG. 6 is a schematic view of an adapter provided in an exemplary embodiment of the present disclosure;

fig. 7 is a schematic view of a support provided in an exemplary embodiment of the present disclosure.

Detailed Description

The technical solutions in the exemplary embodiments of the present disclosure will be clearly and completely described below with reference to the drawings in the exemplary embodiments of the present disclosure. The example embodiments described herein are for illustrative purposes only and are not intended to limit the scope of the present disclosure, and it is, therefore, to be understood that various modifications and changes may be made to the example embodiments without departing from the scope of the present disclosure.

In the description of the present disclosure, unless otherwise explicitly specified or limited, the terms "first", "second", and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more; the term "and/or" includes any and all combinations of one or more of the associated listed items. In particular, reference to "the" object or "an" object is also intended to mean one of many such objects possible.

The terms "connected," "secured," and the like are to be construed broadly and unless otherwise stated or indicated, and for example, "connected" may be a fixed connection, a removable connection, an integral connection, an electrical connection, or a signal connection; "connected" may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present disclosure can be understood by those skilled in the art as the case may be.

Further, in the description of the present disclosure, it is to be understood that the directional words "upper", "lower", "inner", "outer", etc., which are described in the exemplary embodiments of the present disclosure, are described at the angles shown in the drawings, and should not be construed as limiting the exemplary embodiments of the present disclosure. It will also be understood that, in this context, when an element or feature is referred to as being "on", "under", or "inner", "outer" with respect to another element(s), it can be directly on "," under ", or" inner "," outer "with respect to the other element(s), or indirectly on", "under", or "inner", "outer" with respect to the other element(s) via intervening elements.

The present exemplary embodiment of the disclosure first provides a battery current collecting tray 40, as shown in fig. 1 and 2, the battery current collecting tray 40 being used to electrically connect a battery cell 20 and a pole assembly 30, the battery current collecting tray 40 including: the current collecting disc comprises a current collecting disc body 41 and a cantilever 42, wherein the current collecting disc body 41 comprises a first connecting area 401 and a second connecting area 402, the first connecting area 401 is used for connecting the pole assembly 30, and the second connecting area 402 is provided with a cantilever hole 411 penetrating through the current collecting disc body 41; the cantilever 42 is connected with the current collecting tray body 41 and is located in the cantilever hole 411, a gap is formed between the cantilever 42 and the current collecting tray body 41, and the cantilever 42 is used for connecting the battery cell 20.

The battery current collecting disc 40 provided by the embodiment of the disclosure is used for connecting the battery core 20 and the pole assembly 30, can reduce the connection difficulty of the battery core 20 and the pole assembly 30 during assembly, and improves the convenience of battery assembly. And first connection region 401 connects utmost point post subassembly 30 in battery current collecting tray 40, sets up in second connection region 402 and has gapped cantilever 42 with current collecting tray main part 41, connects electric core 20 through cantilever 42, can release battery current collecting tray 40's stress effectively, thereby avoids stress concentration to avoid stress concentration to cause the damage to battery current collecting tray 40, has promoted the yields of battery.

A detailed description of the battery current collecting plate 40 provided in the embodiment of the present disclosure will be given below:

the slip disk body 41 includes a first connection region 401 and a second connection region 402, the first connection region 401 corresponding to the pole assembly 30 for connection to the pole assembly 30. The second connection region 402 at least partially surrounds the first connection region 401, the second connection region 402 corresponds to a tab on the battery cell 20, the cantilever 42 is disposed in the second connection region 402, and the cantilever 42 is connected to a tab of the battery cell 20.

The shape of the first attachment region 401 may match the shape of the connection of the post assembly 30 to the battery current collecting disk 40. For example, if the post assembly 30 is provided with a cylindrical boss 32 and the boss 32 is used to connect the battery current collecting disk 40, the shape of the first connection region 401 of the current collecting disk body 41 may be circular, and the area of the first connection region 401 may be greater than or equal to the area of the connection surface of the boss 32. And the position of the boss portion 32 corresponds to the position of the first connection region 401, i.e., the orthographic projection of the boss portion 32 on the battery current collecting plate 40 is located at the first connection region 401.

The pole assembly 30 and the first connection region 401 can be connected by welding, for example, the pole assembly 30 and the first connection region 401 can be connected by resistance welding. Certainly, in practical applications, the connection manner of the pole assembly 30 and the first connection region 401 may also be other, and this is not specifically limited in the embodiment of the present disclosure.

The second connection region 402 is provided with a cantilever hole 411 penetrating the manifold body 41, and the cantilever 42 is partially connected in the cantilever hole 411. When a plurality of the cantilever holes 411 are provided on the manifold body 41, a cantilever 42 is provided in each of the cantilever holes 411, respectively. In the manifold plate body 41, a plurality of the cantilever holes 411 may be uniformly distributed in the circumferential direction, and in addition, a plurality of the cantilevers 42 may be uniformly distributed in the circumferential direction.

The cantilever hole 411 is positioned inside the second connection region 402 to prevent the cantilever hole 411 from intersecting the outer edge of the current collecting tray body 41, i.e., the cantilever hole 411 is spaced apart from the edge of the battery current collecting tray 40 by a predetermined distance. By providing the cantilever hole 411 inside the second connection region 402, the integrity of the battery manifold disk 40 can be ensured, and the strength of the battery manifold disk 40 can be ensured, avoiding damage to the battery manifold disk 40 during manufacturing, transportation, and the like.

In practical applications, the distance between the end of the cantilever hole 411 close to the edge of the manifold plate body 41 and the edge of the manifold plate body 41 may be gradually changed, and it is required to ensure that the minimum distance between the end of the cantilever hole 411 close to the edge of the manifold plate body 41 and the edge of the manifold plate body 41 is greater than or equal to a preset distance. For example, the predetermined distance may be 1 mm, 1.5 mm, 2 mm, 3 mm, or the like.

Second connection region 402 at least partially surrounds first connection region 401. For example, the second connection region 402 may surround the first connection region 401. The first connection region 401 is a circular region, the second connection region 402 may be a circular ring region, and the first connection region 401 is embedded in an inner ring of the second connection region 402. Of course, in practical applications, the first connection region 401 and the second connection region 402 may have other positional relationships, and the embodiment of the disclosure is not limited thereto. For example, first connection region 401 is located on one side of second connection region 402, first connection region 401 and second connection region 402 are arranged in parallel, and the like.

The battery current collecting plate 40 provided by the embodiment of the present disclosure is the battery current collecting plate 40 applied to the cylindrical battery, and on this basis, the current collecting plate body 41 has a disk-shaped structure. The first connection region 401 is a circular region centered on the center of the manifold body 41, and the second connection region 402 is a circular ring concentric with the first connection region 401. The cantilever hole 411 is a triangular or approximately triangular hole, or the cantilever hole 411 is a fan-shaped or approximately fan-shaped hole. The plurality of cantilever holes 411 are circumferentially distributed, for example, the plurality of cantilever holes 411 are circumferentially distributed. A spacer 413 is disposed between adjacent cantilever holes 411 of the plurality of cantilever holes 411, and when the plurality of cantilever holes 411 are uniformly distributed, the plurality of spacers 413 have the same shape.

A positioning notch 412 can be further arranged on the collecting tray body 41, the positioning notch 412 is arranged on the edge of the collecting tray body 41, the positioning notch 412 corresponds to a spacer 413, and the spacer 413 is positioned between two adjacent cantilever holes 411 in the second connecting area 402. The positioning notches 412 are used to provide positioning during welding, and the positioning notches 412 may serve as a take-out positioning structure during installation of the battery manifold 40.

For example, the battery manifold plate 40 is transferred from the placement station to the installation station by a robot arm that can grip the positioning notch 412 of the battery manifold plate 40 when the battery manifold plate 40 is installed, and the positioning aperture can serve as an identification feature when the robot arm performs machine vision identification. The welding robot can be identified and positioned through the positioning notch 412 when the battery manifold 40 is welded to the battery core 20 and the battery manifold 40 is welded to the pole assembly 30.

The cantilever 42 is connected with the current collecting tray body 41 and is located in the cantilever hole 411, a gap is formed between the cantilever 42 and the current collecting tray body 41, and the cantilever 42 is used for connecting the battery cell 20. At least one tab is provided on the battery cell 20, and the tab is connected to the suspension arm 42. For example, the tab and the cantilever 42 are connected by welding.

The cantilever 42 has a fixed end and a free end, the free end is close to the first connection region 401 and has a gap with the current collecting tray body 41, and the fixed end is connected with the current collecting tray body 41. The free end of the cantilever 42 can be connected with a tab, and the free end of the cantilever 42 can be deformed when being subjected to external force. Therefore, when a force is applied to the cantilever 42 due to the concentration of attractive force, etc., the force can be offset by the deformation of the cantilever 42, thereby preventing the connection between the tab and the cantilever 42 from being damaged and improving the connection stability between the tab and the cantilever 42.

When the battery collector 40 has a circular shape, the cantilever 42 may have an approximately triangular or fan-shaped configuration, with the width of the cantilever 42 gradually increasing in a direction away from the first connection region 401, and the width of the cantilever 42 being the distance between two sides of the cantilever 42 from the fixed end to the free end. In practical applications, the cantilever 42 may also have other structures, and the embodiment of the disclosure is not limited thereto, for example, the cantilever 42 may also have a rectangular strip structure.

Further, in order to increase the flexibility of the cantilever 42, the battery manifold 40 provided by the embodiment of the present disclosure may further include a connection portion 43, the connection portion 43 respectively connecting the fixed end and the manifold body 41, and a width of the connection portion 43 is smaller than a maximum width of the fixed end of the cantilever 42.

By setting the width of the connecting portion 43 to be smaller than the width of the fixed end of the cantilever 42, the battery current collecting tray 40 can have greater flexibility at the connecting portion 43, which is beneficial to the deformation of the free end of the cantilever 42, thereby further improving the connecting strength of the cantilever 42 and the tab.

The material of the battery current collecting plate 40 in the embodiment of the present disclosure is a conductor material, for example, the material of the battery current collecting plate 40 may be one or more of copper, aluminum, silver, titanium, steel, aluminum alloy, and titanium alloy.

It should be noted that, in the embodiment of the present disclosure, the battery current collecting plate 40 may be a one-piece structure, and the suspension arm 42 may be a structure that one end of the current collecting plate body 41 is separated by a cut slot and is suspended. For example, an approximately V-shaped or U-shaped channel may be cut through a disk to form the cantilever arms 42 in the area inside the channel. Alternatively, the battery collector 40 may be a separate structure, and the collector body 41 may be provided with a through cantilever hole 411, and the cantilever 42 may be connected to a corresponding position of the cantilever hole 411 by welding or the like.

The battery current collecting disc 40 provided by the embodiment of the disclosure is used for connecting the battery core 20 and the pole assembly 30, so that the connection difficulty of the battery core 20 and the pole assembly 30 during assembly can be reduced, and the convenience of battery assembly is improved. And the first connection region 401 in the battery current collecting disc 40 is connected with the pole assembly 30, the cantilever 42 with a gap is arranged in the second connection region 402, and the current collecting disc main body 41 is connected with the battery core 20 through the cantilever 42, so that the stress of the battery current collecting disc 40 can be effectively released, the stress concentration is avoided, the damage to the battery current collecting disc 40 caused by the stress concentration is avoided, and the yield of the battery is improved. And the cantilever hole can also be used as a leakage hole, so that the infiltration rate of the electrolyte is improved, the space between the current collecting disc and the shell is communicated, more accommodating spaces are provided for the electrolyte, and the electrolyte can be infiltrated from the bottom.

The embodiment of the present disclosure also provides a battery, which includes the battery current collecting disc 40. Wherein, the battery current collecting plate 40 includes: the current collecting disc comprises a current collecting disc body 41 and a cantilever 42, wherein the current collecting disc body 41 comprises a first connecting area 401 and a second connecting area 402, the first connecting area 401 is used for connecting the pole assembly 30, and the second connecting area 402 is provided with a cantilever hole 411 penetrating through the current collecting disc body 41; the cantilever 42 is connected with the current collecting tray body 41 and is located in the cantilever hole 411, a gap is provided between the cantilever 42 and the current collecting tray body 41, and the cantilever 42 is used for connecting the battery cell 20.

The battery provided by the embodiment of the disclosure comprises the battery current collecting disc 40, wherein the battery current collecting disc 40 is used for connecting the battery core 20 and the pole assembly 30, so that the connection difficulty of the battery core 20 and the pole assembly 30 during assembly can be reduced, and the convenience of battery assembly is improved. And the first connection region 401 in the battery current collecting disc 40 is connected with the pole assembly 30, the cantilever 42 with a gap is arranged in the second connection region 402, and the current collecting disc main body 41 is connected with the battery core 20 through the cantilever 42, so that the stress of the battery current collecting disc 40 can be effectively released, the stress concentration is avoided, the damage to the battery current collecting disc 40 caused by the stress concentration is avoided, and the yield of the battery is improved.

Further, as shown in fig. 1, the battery provided by the embodiment of the present disclosure may further include a battery case 10, a battery cell 20, and a pole assembly 30, where the battery cell 20 is disposed in the battery case 10. As shown in fig. 3, the pole assembly 30 is disposed in the battery housing 10, and the pole assembly 30 is at least partially located in the battery housing 10; the battery collector 40 is located between the pole assembly 30 and the battery cell 20, the pole assembly 30 is connected to the first connection region 401, and the battery cell 20 is connected to the second connection region 402.

The battery case 10 serves to form an outer contour of the battery, and the battery case 10 can protect the structure inside the battery. The battery case 10 has a holding cavity, the battery core 20 is disposed in the holding cavity of the battery case 10, the terminal assembly 30 is disposed in the battery case 10, and at least a portion of the terminal assembly 30 is disposed in the holding cavity.

The battery case 10 may include a case member 12 and a first cover plate 11, wherein one end of the case member 12 has a first opening. The first cover 11 is connected to the housing part 12, and the first cover 11 is located at a first opening of the housing part 12, and the connection of the first cover 11 to the housing part 12 closes the end of the housing part 12.

For example, the battery provided by the embodiment of the present disclosure may be a cylindrical battery. On this basis, the battery case 10 may be a hollow cylinder or an approximately hollow cylinder structure. The battery case 10 is a thin-walled structure, and the thickness of the thin wall of the battery case 10 may be the same or different at different locations. The first cover plate 11 is a thin wall of one bottom surface of the hollow cylinder, and the housing member 12 may include a thin wall of the other bottom surface of the hollow cylinder and a thin wall of the side surface of the hollow cylinder.

In the embodiment of the present disclosure, the first cover plate 11 and the housing member 12 may be a unitary structure, for example, the first cover plate 11 and the housing member 12 may be formed by stamping, machining, or casting. Alternatively, the first cover plate 11 and the housing member 12 may be of a split structure, and the first cover plate 11 and the housing member 12 may be connected by welding, rolling, or gluing.

Optionally, the battery housing may further include a second cover 13, the second cover 13 is connected to the housing member 12, and the second cover 13 is located at an end of the housing member 12 away from the first cover 11. That is, both ends of the case member 12 are provided with openings, respectively, and the first cover plate 11 and the second cover plate 13 are connected to both ends of the case member 12, respectively.

On this basis, the housing member 12 and the second cover plate 13 may be of a unitary structure, for example, the second cover plate 13 and the housing member 12 may be formed by stamping, machining, or casting. Alternatively, the second cover plate 13 and the housing part 12 may be of a split structure, and the second cover plate 13 and the housing part 12 may be connected by welding, rolling, or gluing.

Can be provided with the installation through-hole on first apron 11, this installation through-hole is worn to locate by utmost point post subassembly 30 to can be provided with the sealing member in this installation through-hole department, this sealing member seals installation through-hole and utmost point post subassembly 30, avoids the inside electrolyte of battery to ooze from the mounting hole.

The material of the battery case 10 in the embodiment of the present disclosure is a metal material, for example, the material of the battery case 10 may be steel, aluminum, copper, silver, or the like. In the battery case 10, the materials of the first cover plate 11, the case member 12, and the second cover plate 13 may be the same, or the materials of the first cover plate 11, the case member 12, and the second cover plate 13 may be different. The thicknesses of the first cover plate 11, the second cover plate 13, and the case member 12 may be the same, or the materials of the first cover plate 11, the second cover plate 13, and the case member 12 may be different.

The battery cell 20 is provided in the battery case 10, and the battery cell 20 refers to a unit formed by winding or laminating a stack including a first electrode, a separator, and a second electrode. When the first electrode is a positive electrode, the second electrode is a negative electrode. Wherein the polarities of the first and second electrodes may be interchanged.

The battery 20 is connected with the battery current collecting disc 40, and the battery current collecting disc 40 is connected with the pole assembly 30, so that the electrical connection between the battery 20 and the pole assembly 30 is realized. The shape of the battery core 20 may match the shape of the battery, for example, when the battery is a cylindrical battery, the battery core 20 may also have a cylindrical or approximately cylindrical structure.

The cell 20 may include a cell body and tabs (not shown) protruding from the end of the cell body for connection to the battery collector 40. For example, the cell body may be provided with a first tab and a second tab, where the first tab is disposed at one end of the cell body, and the second tab is disposed at the other end of the cell body. The first tab may be a positive tab, the second tab may be a negative tab, the first tab is disposed at one end of the cell body close to the terminal assembly 30, and the second tab is disposed at one end of the cell body away from the terminal assembly 30. The first tab may be welded to the battery collector plate 40.

The battery cell main body may include a first pole piece, a second pole piece, and a diaphragm, the first pole piece may be disposed on the first tab, the second pole piece may be disposed on the second tab, and the first pole piece and the second pole piece may be isolated by the diaphragm to form the battery cell main body.

Specifically, the battery cell 20 provided in the embodiment of the present disclosure may be a winding battery cell 20, and the winding battery cell 20 is obtained by winding a first pole piece, a second pole piece having an opposite electrical property to the first pole piece, and a diaphragm sheet disposed between the first pole piece and the second pole piece.

Of course, in practical applications, the battery cell 20 may also be a laminated battery cell 20, and the embodiment of the present disclosure is not limited thereto, and the battery cell 20 has a first pole piece, a second pole piece opposite to the first pole piece, and a diaphragm piece disposed between the first pole piece and the second pole piece, so that a plurality of pairs of the first pole piece and the second pole piece are stacked to form the laminated battery cell 20.

In one possible embodiment, the tab near one end of the post assembly 30 is a positive tab, and the positive tab is connected to the post assembly 30, i.e. the post assembly 30 is a positive post. The negative electrode of the battery can be realized by the battery case 10, and the negative electrode tab can be electrically connected with the battery case to use the metal battery case 10 as the negative electrode.

As shown in fig. 4, the pole assembly 30 includes a main body 31, a flanging portion 33 and a protruding portion 32, the flanging portion 33 and the protruding portion 32 are both connected to one end of the main body 31 close to the battery cell 20, at least part of the flanging portion 33 and at least part of the protruding portion 32 are both located in the battery case 10, the flanging portion 33 is connected to the battery case 10, and the protruding portion 32 is electrically connected to the battery cell 20.

The flanging part 33 is connected with the battery shell 10, and the protruding part 32 is connected with the battery cell 20, so that the independent connection of the pole post assembly 30, the battery shell 10 and the battery cell 20 is realized, the problem that the connection of the pole post assembly 30 is unstable due to mutual influence of the battery shell 10 and the battery cell 20 during connection is avoided, the connection stability of the battery cell 20 is improved, at least part of the surface of the flanging part 33 connected with the battery shell 10 is perpendicular to the axial direction of the battery cell 20, the flanging part 33 can also be electrically connected with the battery cell 20, and the overcurrent capacity of the battery cell 20 is improved.

The pole assembly 30 can be inserted into the battery case 10, and a mounting through hole is provided on the battery case 10, and the pole assembly 30 is mounted in the mounting through hole. The main body 31 at least partially protrudes from a side of the first cover plate 11 away from the battery cell 20, and the flanging part 33 and the protruding part 32 are located in the accommodating cavity of the battery case 10.

The pole post assembly 30 is arranged on the first cover plate 11, the flanging part is connected with the first cover plate 11, and the flanging part 33 is at least partially parallel with the first cover plate 11. When the battery includes the insulating member 50, the burring 33 is coupled to the first cap plate 11 through the insulating member 50.

A burring portion 33 is provided at one end of the main body portion 31 near the battery cell 20, and the burring portion 33 is used for connection with the battery case 10. For example, the burring 33 may be riveted to the battery case 10. In the embodiment of the present disclosure, the burring part 33 is formed by burring after the pole assembly 30 is mounted to the battery case 10. That is, the burring 33 may be a cylindrical structure provided coaxially with the boss 32 before the fitting, and the cylindrical structure has a diameter smaller than the diameter of the mounting through-hole of the battery case 10, and after the pole assembly 30 is mounted in the mounting hole, the burring 33 is formed by pressing the cylindrical structure of the pole assembly 30 by means of pressing or the like.

The protrusion 32 is disposed at one end of the main body 31 close to the battery cell 20, and the protrusion 32 is used to electrically connect the battery cell 20. The boss 32 may be coupled to the battery current collecting plate 40, for example, the boss 32 may be coupled to the battery current collecting plate 40 by welding. The welding of the boss 32 and the battery collector 40 may be resistance welding.

The boss portion 32 and the burring portion 33 are attached to the same end surface of the main body portion 31, and a cushion groove 34 is provided between the burring portion 33 and the boss portion 32. Through set up buffering recess 34 between turn-ups portion 33 and bellying 32, prevent that turn-ups portion 33 riveting process stress concentration from leading to the problem that pole subassembly 30 appears structural damage to set up buffering recess 34 between turn-ups portion 33 and bellying 32, make turn-ups portion 33 easily turn-ups when the turn-ups, thereby can promote production efficiency. Through the buffer slot isolation turn-ups portion 33 and the bulge 32, can also avoid influencing each other between turn-ups portion 33 and the bulge 32 when connecting to promote the stability of utmost point post subassembly 30 connection.

In a possible embodiment, the flanging part 33 may be a ring or an approximately ring structure, the protrusion part 32 is a column structure, and the protrusion part 32 is disposed inside the ring flanging part 33. Between the outer wall of the boss portion 32 and the outer wall of the burring portion 33, there is a gap that forms a buffer groove 34. For example, the burring 33 and the boss 32 may be coaxially arranged, and the maximum diameter of the boss 32 is smaller than the minimum inner diameter of the burring 33.

The burring part 33 may include a transition section 331 and a connection section 332, the transition section 331 being connected with the main body part 31; the connecting section 332 is connected to the transition section 331, the connecting section 332 is located on a side of the transition section 331 away from the main body portion 31, the connecting section 332 is connected to the battery case 10, and a surface of the connecting section 332 facing the battery core 20 is a plane.

The transition section 331 extends from the main body portion 31 to the connecting section 332, and the diameter of the transition section 331 may gradually increase along a first direction along the battery axis from the main body portion 31 to the connecting section 332. The transition section 331 increases in diameter in a first direction to form a flared transition section. The diameter of the transition 331 along the first direction may be linearly increasing or non-linearly increasing.

In the embodiment of the present disclosure, the material of the pole assembly 30 is a conductor material, for example, the material of the pole assembly 30 may be aluminum, aluminum alloy, copper, stainless steel, silver, or the like. The material of the pole assembly 30 may be the same as the material of the battery case 10, or the material of the pole assembly 30 may be different from the material of the battery case 10, which is not particularly limited in the embodiment of the present disclosure.

Further, in order to insulate the battery case 10 and the pole assembly 30, the battery provided by the embodiment of the present disclosure may further include an insulation assembly 50. The insulation assembly 50 is disposed between the pole assembly 30 and the first cover plate 11 such that the burring part 33 is connected with the first cover plate 11 through the insulation assembly 50. The insulation assembly 50 serves to insulate between the battery case 10 and the pole assembly 30.

The insulation assembly 50 may include a first insulation member 51 and a second insulation member 52, the first insulation member 51 is disposed between the limiting portion and the first cover plate 11, and the first insulation member 51 is used for insulating the first cover plate 11 from the limiting portion. The second insulating member 52 is provided between the first cover plate 11 and the burring 33, and the second insulating member 52 serves to insulate the first cover plate 11 from the burring 33. And a second insulating member 52 may cover a side of the first cap plate 11 facing the battery cell 20 to insulate the cap plate from the battery manifold 40.

The first insulating member 51 may be provided with a first insulating hole, and the pole assembly 30 is disposed through the first insulating hole. The first insulating piece 51 has a first surface and a second surface which are parallel to each other, the first surface of the first insulating piece 51 is in contact with the limiting part, and the second surface of the first insulating piece 51 is in contact with one surface of the first cover plate 11, which is away from the battery cell 20.

The second insulating member 52 may be provided with a second insulating hole, and the pole assembly 30 is disposed through the second insulating hole. The second insulating member 52 has a first surface and a second surface which are parallel to each other, the first surface of the second insulating member 52 is in contact with a surface of the first cover plate 11 adjacent to the battery cell 20, and the second surface of the second insulating member 52 is in contact with the burring portion 33.

In one possible embodiment, the second insulator 52 may be a unitary structure. For example, the second insulating member 52 is a circular ring structure, the second insulating member 52 is attached to one side of the first cover plate 11 close to the battery cell 20, and the second insulating hole in the second insulating member 52 is overlapped with the mounting hole in the first cover plate 11. The second insulating member 52 is of an integrated structure, and the second insulating member 52 can be installed through one-time installation during installation, which is beneficial to improving the installation efficiency.

A first insulating protrusion may be disposed at the second insulating hole of the second insulating member 52, the first insulating protrusion extends toward one end of the second insulating member 52 close to the first cover plate 11, and the first insulating protrusion extends into the mounting through hole on the first cover plate 11. The first insulating protrusion may be disposed along an edge of the second insulating hole, that is, the first insulating protrusion is in a circular ring shape, and the first insulating protrusion extends into the mounting through hole to isolate the first cover plate 11 and the pole assembly 30.

In another possible embodiment of the present disclosure, the second insulating member 52 may be a split structure. For example, the second insulator 52 includes a first insulator 521 and a second insulator 522. The first insulator 521 is disposed on the post assembly 30, and the second insulator 522 is disposed on the first insulator 521. The first insulator 521 and the second insulator 522 are arranged in a split manner, so that the deformation of the second insulator 52 generated during battery assembly can be reduced, and the quality and the yield of the battery can be improved.

The first insulator 521 is a circular ring or an approximate circular ring structure, a third insulating hole is provided on the first insulator 521, and the pole assembly 30 penetrates through the third insulating hole. A second insulating protrusion is disposed at the third insulating hole of the first insulator 521, extends towards one end of the first insulator 521 close to the first cover plate 11, and extends into the mounting through hole on the first cover plate 11. The second insulating protrusion may be arranged along the edge of the third insulating hole, that is, the second insulating protrusion is in a circular ring shape, and the second insulating protrusion extends into the mounting through hole to isolate the first cover plate 11 and the pole assembly 30. The second insulator 522 is also a circular ring or an approximate circular ring structure, a fourth insulating hole is arranged on the second insulator 522, and the first insulator 521 is arranged through the fourth insulating hole. A third insulating protrusion is provided at the fourth insulating hole of the second insulating member 52, the third insulating protrusion extends toward one end of the second insulator 522 close to the battery cell 20, and the third insulating protrusion contacts the burring 33.

The third insulation protrusion on the second insulator 522 may be disposed corresponding to the burring 33 of the pole assembly 30, and the third insulation protrusion may contact the end of the burring 33. That is, the inner diameter of the third insulation protrusion may be equal to or slightly greater than the outer diameter of the burring 33. The third insulating bulge and the flanging part 33 are correspondingly arranged, so that the connection stability and the insulating property can be improved.

In the embodiment of the present disclosure, the material of the insulating member 50 may be plastic, rubber, or ceramic, and the material of the first insulating member 51 and the second insulating member 52 may be the same or different. When the second insulating member 52 includes the first insulator 521 and the second insulator 522, the materials of the first insulator 521 and the second insulator 522 may be the same or different, and this is not particularly limited in the embodiment of the present disclosure.

In the embodiment of the present disclosure, when the post assembly 30 is a positive post, a negative end needs to be disposed in the battery, and the battery housing 10 can be used as a negative electrode to ensure that the positive end and the negative end of the battery are located on the same side of the battery. At this time, the negative electrode tab of the battery cell 20 needs to be connected to the battery case 10, and in order to connect the negative electrode tab to the battery case 10, the battery provided in the embodiment of the present disclosure may further include an adaptor 60, where the adaptor 60 is connected to the battery case 10 and the battery cell 20, respectively.

As shown in fig. 6, the adaptor 60 may include a first connection portion 61, a second connection portion 62, and a buffer portion 63, where the first connection portion 61 is used to connect the battery cell 20, the second connection portion 62 is used to connect the battery case 10, and the first connection portion 61 and the second connection portion 62 are connected by the buffer portion 63. The first connection portion 61 and the second connection portion 62 have an included angle therebetween, so that a surface of the second connection portion 62 for electrical connection with the battery case 10 is inclined to a surface of the first connection portion 61 for electrical connection with the battery cell 20.

The adaptor 60 may include a plurality of second connection portions 62 thereon, and the plurality of second connection portions 62 have a gap therebetween, where the gap is used to provide a space for deformation of the second connection portions 62 when the second connection portions 62 are connected to the battery case 10, so as to prevent the plurality of second connection portions 62 from interfering with each other when the battery case is mounted.

Accordingly, the adaptor 60 includes a plurality of first connection portions 61, and each first connection portion 61 is connected to a negative tab. The stress of the adapter 60 can be released by the first connecting portions 61 which are independently arranged, and the problem that the adapter 60 is deformed due to stress concentration of the adapter 60 and then the adapter 60 or the connection between the adapter 60 and the tab is damaged is solved. The connection stability of the junction 60 in the battery is improved.

The buffer portion 63 connects the first connection portion 61 and the second connection portion 62, and when the adaptor 60 is mounted, the buffer portion 63 is deformed, and in order to control the deformation direction of the buffer portion 63, a bending structure may be preset on the buffer portion 63, and the bending structure may be configured to face a side away from the battery cell 20.

In practical applications, in order to further guide the deformation direction of the buffer portion 63, the battery provided in the embodiment of the present disclosure may further include a support member 70, where the support member 70 is at least partially located between the buffer portion 63 and the battery cell 20. By the support member 70 provided between the buffer portion 63 and the battery cell 20, the bending direction of the buffer portion 63 can be guided so that the buffer portion 63 is deformed in a direction away from the battery cell 20.

As shown in fig. 7, the buffer portion 63 is provided with a bent portion, and the support member 70 is provided with a fixing claw 71, and the fixing claw 71 is engaged in the bent portion of the buffer portion 63, so that a portion of the fixing claw 71 is located between the battery cell 20 and the battery collecting tray 40. When the second connection portion 62 compresses the buffer portion 63, the fixing claws 71 can guide the deformation of the buffer portion 63, thereby preventing the buffer portion 63 from being deformed in a direction approaching the battery cell 20.

The fixing claws 71 on the support member 70 may correspond to the buffer portions 63 on the adaptor member 60 one to one, that is, the number of the fixing claws 71 is the same as the number of the buffer portions 63. Each buffer 63 corresponds to a fixing jaw 71, which guides the deformation of the buffer 63 and facilitates the installation of the support 70.

The battery provided by the embodiment of the present disclosure includes a battery current collecting disc 40, and the battery current collecting disc 40 is used for connecting the battery cell 20 and the pole assembly 30, so that the connection difficulty of the battery cell 20 and the pole assembly 30 during assembly can be reduced, and the convenience of battery assembly is improved. And first connection region 401 connects utmost point post subassembly 30 in battery current collecting tray 40, sets up in second connection region 402 and has gapped cantilever 42 with current collecting tray main part 41, connects electric core 20 through cantilever 42, can release battery current collecting tray 40's stress effectively, thereby avoids stress concentration to avoid stress concentration to cause the damage to battery current collecting tray 40, has promoted the yields of battery.

The battery provided by the embodiment of the disclosure can be applied to an electric vehicle, and when the battery is used for the electric vehicle, a plurality of batteries can be integrated into a battery pack, and the battery pack is mounted on the electric vehicle to provide energy for the electric vehicle.

The battery pack may include a case and a plurality of batteries, the plurality of batteries being disposed in the case, the case being configured to support and protect the batteries. The battery box body can be further provided with a bus bar, and the bus bar can be connected with the battery pole assembly to realize series connection or parallel connection of a plurality of batteries.

In practical application, the battery pack can be mounted on a frame of an electric vehicle. The battery pack can be fixedly connected with the frame. Or the battery pack can be a modular battery pack which can be detachably connected to the vehicle body, so that the battery pack is convenient to replace.

Other embodiments of the disclosure will be apparent to those skilled in the art from consideration of the specification and practice of the disclosure disclosed herein. This application is intended to cover any variations, uses, or adaptations of the disclosure following, in general, the principles of the disclosure and including such departures from the present disclosure as come within known or customary practice in the art to which the disclosure pertains. It is intended that the specification and examples be considered as exemplary only, with a true scope and spirit of the disclosure being indicated by the following claims.

Claims (11)

1. The utility model provides a battery current collector which characterized in that for electricity core and utmost point post subassembly are connected, battery current collector includes:

the current collecting disc main body comprises a first connecting area and a second connecting area, the first connecting area is used for connecting the pole, and the second connecting area is provided with a cantilever hole penetrating through the current collecting disc main body;

the cantilever with the current collector main part is connected and is located the cantilever hole, the cantilever with the clearance has between the current collector main part, the cantilever is used for connecting electric core.

2. The battery manifold as in claim 1, wherein said cantilevered aperture is located within said second connecting region.

3. The battery manifold as recited in claim 1, wherein said second connection region at least partially surrounds said first connection region.

4. The battery manifold as described in claim 3, wherein said cantilever arm has a fixed end and a free end, said free end being adjacent to said first connection region and having a gap with said manifold body, said fixed end being coupled to said manifold body.

5. The battery manifold disc of claim 4, further comprising:

connecting portion, connecting portion connect respectively the stiff end with the current collecting tray main part, the width of connecting portion is less than the maximum width of stiff end.

6. The battery manifold as in any of claims 1-5, wherein a plurality of said cantilever apertures are provided in said second connection region, a corresponding one of said cantilevers being disposed within each of said cantilever apertures.

7. The battery manifold disk of claim 6, wherein an edge of said manifold disk body is provided with a positioning notch.

8. The battery manifold as in claim 7, wherein said alignment notches are located in a spacer area located between two adjacent cantilever apertures in the second connecting region.

9. A battery comprising a battery current collector according to any one of claims 1 to 8.

10. The battery of claim 9, further comprising:

a battery case;

the battery core is arranged in the battery shell;

the pole assembly is arranged in the battery shell and is at least partially positioned in the battery shell;

the battery current collecting disc is located between the pole post assembly and the battery core, the pole post assembly is connected to the first connecting area, and the battery core is connected to the second connecting area.

11. The battery of claim 9 or 10, wherein the battery is a cylindrical battery.

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