CN218070013U - End cover assembly of battery, battery pack and electric equipment - Google Patents

Abstract

The application discloses end cover assembly of battery includes: the insulating piece comprises a body part and a supporting convex part, the supporting convex part is arranged on the body part, the supporting convex part and the body part enclose a first accommodating area, and the first accommodating area and the supporting convex part are arranged on the same side of the body part; the end cover and the insulating piece are sequentially arranged in the first direction, and the end cover is arranged on one side of the body part, which is far away from the supporting convex part; the first direction is a protruding direction of the supporting convex part relative to the body part; the current collector comprises a first current collecting part and a second current collecting part connected with the first current collecting part, the first current collecting part is arranged in the first accommodating area, and the second current collecting part is arranged on one side, away from the body part, of the supporting convex part; the first current collecting portion and the supporting convex portion are in limit fit towards the first direction. Like this, support the convex part and can realize the location and the support to the mass flow body to improve the stability of the positional stability and the electric conduction of the mass flow body, this application still discloses a battery, battery package and consumer.

Description

End cover assembly of battery, battery pack and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to an end cover assembly of a battery, the battery, a battery pack and electric equipment.

Background

The power battery is an energy storage device commonly used in the technical field of new energy sources at present, a current collector and a pole column are usually arranged on an end cover assembly of the power battery, and the current collector is used for being respectively connected with the pole column and a battery cell inside the battery, so that energy stored in the battery cell is led out, and the discharge of the battery is realized.

However, in the related art, the assembly process of the battery is complex and cumbersome, and particularly, the installation and the limitation of the current collector are difficult to control, which may affect the installation stability of the current collector to a certain extent, thereby reducing the electrical conductivity of the battery.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application discloses end cover assembly, battery package and consumer of battery can solve because of the installation of mass flow body and spacing difficult control, leads to reducing the problem of the electrically conductive performance of battery.

To achieve the above object, in a first aspect, the present application discloses an end cap assembly of a battery, comprising: the insulating piece comprises a body part and a supporting convex part, the supporting convex part is arranged on the body part, the supporting convex part and the body part enclose a first accommodating area, and the first accommodating area and the supporting convex part are arranged on the same side of the body part; the end cover and the insulating piece are sequentially arranged in the first direction, and the end cover is arranged on one side of the body part, which is far away from the supporting convex part; the first direction is a protruding direction of the supporting convex part relative to the body part; the current collector comprises a first current collecting part and a second current collecting part connected with the first current collecting part, the first current collecting part is arranged in the first accommodating area, and the second current collecting part is arranged on one side, away from the body part, of the supporting convex part; in the use state of the end cover assembly, the first current collecting part is in limit fit with the supporting convex part towards the first direction.

Optionally, the supporting convex part comprises a first convex part and a second convex part, the first convex part and the second convex part are both arranged on the same side of the body part, and a first accommodating area is formed between the first convex part and the second convex part; the second current collecting portion is arranged on one side, away from the body portion, of the first protruding portion and on one side, away from the body portion, of the second protruding portion.

Alternatively, the first projection projects to the same height relative to the body portion as the second projection projects relative to the body portion.

Alternatively, the first protrusion protrudes with respect to the body portion at a different height than the second protrusion protrudes with respect to the body portion.

Optionally, at least one of the first protrusion, the second protrusion and the body portion is provided with a weight-reducing slot.

Optionally, the insulating member is provided with a flow guide channel, the flow guide channel is provided with a first flow guide opening and a second flow guide opening, the flow guide channel is communicated with the lightening groove through the first flow guide opening, and the second flow guide opening is formed in the surface of the insulating member.

Optionally, the flow guide channel is provided on the first protrusion, and/or the flow guide channel is provided on the second protrusion.

Optionally, the diversion channel is formed along a first direction, the weight reduction groove and the diversion channel are sequentially communicated along the first direction, and the first direction is consistent with the gravity direction.

Optionally, the end cover assembly further comprises a conductive member, the end cover assembly is provided with a mounting hole, and the mounting hole is sequentially arranged through the end cover and the insulating member so as to communicate with the first accommodating area; the conductive member is disposed in the mounting hole to electrically connect the first current collecting portion.

Optionally, the number of the conductive members is two, the two conductive members are respectively a first conductive body and a second conductive body, the end cover assembly is provided with two mounting holes, one of the two mounting holes is provided with the first conductive body, and the other one is provided with the second conductive body.

Alternatively, the first conductor may be provided at a distance from the first projection and the second projection, respectively, and the second conductor may be provided at a distance from the first projection and the second projection, respectively.

Optionally, the first conductor and the second conductor are both located between the first protrusion and the second protrusion, the first conductor is disposed near the first protrusion, and the second conductor is disposed near the second protrusion.

Optionally, the first conductor includes a first column portion and a first chassis portion connected to each other, the second conductor includes a second column portion and a second chassis portion connected to each other, at least a portion of the first column portion and at least a portion of the second column portion are respectively disposed in a mounting hole, and the first chassis portion and the second chassis portion are both disposed in the first accommodation region and are both electrically connected to the first current collecting portion.

Optionally, the conductive member and the current collector are sequentially arranged in the first direction, and the area of the cross section of the first column portion facing the first direction is smaller than the area of the cross section of the first chassis portion facing the first direction, and the area of the cross section of the second column portion facing the first direction is smaller than the area of the cross section of the second chassis portion facing the first direction.

Optionally, a surface of the body portion, on which the first convex portion and the second convex portion are disposed, is a first base surface, the first chassis portion and the second chassis portion are both circular, the first chassis portion forms a first projection on the first base surface, the second chassis portion forms a second projection on the first base surface, the first convex portion forms a third projection on the first base surface, the second convex portion forms a fourth projection on the first base surface, the first projection and the second projection are both located between the third projection and the fourth projection, and a linear distance between a connecting line between a center of the first projection and a center of the second projection is L ₁ The extension line of the connecting line between the center of the first projection and the center of the second projection forms a first intersection point with the outer edge line of one side, close to the first projection, of the third projection, the extension line of the connecting line between the center of the first projection and the center of the second projection forms a second intersection point with the outer edge line of one side, close to the second projection, of the fourth projection, and the straight-line distance between the first intersection point and the second intersection point is L ₂ ，1/3≤L ₁ /L ₂ ≤4/5。

Optionally, one surface of the first convex portion facing the first accommodating area is a first side surface, the first side surface has a first curved surface, and the first curved surface and the first chassis portion are concentrically arranged; and/or one surface of the second convex part facing the first accommodating area is a second side surface, the second side surface is provided with a second curved surface, and the second curved surface and the second chassis part are arranged concentrically.

Optionally, one side of the first convex portion facing the first accommodating area is a first side surface, and the outer peripheral surface of the first chassis portion is in contact with the first side surface; and/or one side of the second convex part facing the first accommodating area is a second side surface, and the outer peripheral surface of the second chassis part is in contact with the second side surface.

Optionally, the first side surface has a first curved surface, and the first curved surface is concentrically arranged with the first chassis part and is attached to the outer peripheral surface of the first chassis part; and/or the second side surface is provided with a second curved surface which is concentrically arranged with the second chassis part and is attached to the outer peripheral surface of the second chassis part.

Optionally, at least one of the first protrusion and the first chassis part has elasticity; and/or at least one of the second convex part and the second chassis part has elasticity.

Optionally, the height of the first chassis portion facing the first direction and the height of the second chassis portion facing the first direction are both less than or equal to the height of the first protrusion facing the first direction, and/or the height of the first chassis portion facing the first direction and the height of the second chassis portion facing the first direction are both less than or equal to the height of the second protrusion facing the first direction.

Optionally, the insulating member further includes a limiting protrusion, the limiting protrusion is disposed on the body portion, the limiting protrusion is in limiting fit with the current collector towards the second direction, and the first direction intersects with the second direction.

Optionally, the current collector is provided with a guide groove, and the current collector is in guide fit with the limit convex part towards the first direction through the guide groove.

Optionally, the limiting convex part is located in the first accommodating area, and the limiting convex part is in limiting fit with the first current collecting part.

Optionally, the height of the protruding part relative to the body part is smaller than the height of the protruding part of the first chassis part relative to the body part, and the height of the protruding part relative to the body part is smaller than the height of the protruding part of the second chassis part relative to the body part.

Optionally, the protruding height of the limiting protrusion relative to the body part is H _a The protruding heights of the first chassis part and the second chassis part relative to the body part are both H _b ，1/4≤H _a /H _b ≤5/6。

Optionally, the limiting protrusion is close to the first conductor and is disposed far away from the second conductor.

Optionally, one side of the first protruding portion, which faces away from the body portion, is provided with a first supporting end face, one side of the second protruding portion, which faces away from the body portion, is provided with a third supporting end face, and in a use state of the end cover assembly, the second current collecting portion is attached to the first supporting end face and attached to the third supporting end face.

Optionally, at least one of the first and second protrusions has elasticity.

Optionally, the hardness of the body portion is greater than the hardness of the first protrusion, and the hardness of the body portion is greater than the hardness of the second protrusion.

Optionally, the body portion, the first protrusion and the second protrusion are integrally formed.

Optionally, the first protrusion includes a first sub-protrusion and a second sub-protrusion, the second protrusion includes a third sub-protrusion and a fourth sub-protrusion, the height of the first sub-protrusion protruding from the main body is smaller than the height of the second sub-protrusion protruding from the main body, the height of the third sub-protrusion protruding from the main body is smaller than the height of the fourth sub-protrusion protruding from the main body, the second current collecting portion is disposed on a side of the first sub-protrusion away from the main body, and is disposed on a side of the third sub-protrusion away from the main body, the second current collecting portion is in limit fit with the first sub-protrusion and the third sub-protrusion towards the first direction, the side of the second sub-protrusion away from the main body, and the side of the fourth sub-protrusion away from the main body are used for disposing the battery cell, and are in limit fit with the battery cell towards the first direction.

Optionally, a first accommodation area is formed between the first sub-protrusion and the third sub-protrusion, a second accommodation area is formed between the second sub-protrusion and the fourth sub-protrusion, the first accommodation area and the second accommodation area are sequentially communicated, the first current collecting portion is disposed in the first accommodation area, and the second current collecting portion is disposed in the second accommodation area.

Optionally, a surface of the body portion for disposing the first protrusion and the second protrusion is a first base surface, and an area of the first accommodating area on the first base surface is smaller than an area of the second accommodating area on the first base surface.

Alternatively, the height at which the first sub-protrusion protrudes with respect to the body portion coincides with the height at which the third sub-protrusion protrudes with respect to the body portion, and the height at which the second sub-protrusion protrudes with respect to the body portion coincides with the height at which the fourth sub-protrusion protrudes with respect to the body portion.

Optionally, the first side of the second sub-protrusion and the first side of the fourth sub-protrusion are spaced from each other to form a ventilation opening, and the second side of the second sub-protrusion and the second side of the fourth sub-protrusion are connected to each other to connect the second sub-protrusion and the fourth sub-protrusion to form an open ring, and the ventilation opening is connected with the open ring end to end.

Optionally, the end cover is provided with a pressure relief hole, the pressure relief hole is provided with an explosion-proof valve, the body portion is provided with a vent hole, and the pressure relief hole, the vent hole and the first accommodating area are sequentially connected.

In a second aspect, the present application discloses a battery comprising: casing, electric core and end cover subassembly, casing are equipped with and hold the chamber, hold the chamber and have the shaping in the opening of the at least one side of casing, and the chamber is located to electric core, and the opening is located to the end cover subassembly, and end cover, insulating part and electric core set gradually towards the first direction, and second mass flow part is connected with electric core electricity.

Optionally, the battery cell is respectively disposed on the first convex portion and the second convex portion, and is in spacing fit with the first convex portion and the second convex portion towards the first direction.

In a third aspect, the present application discloses a battery pack, comprising: a battery.

In a fourth aspect, the present application discloses a powered device, comprising: a battery pack.

Compared with the prior art, the beneficial effect of this application is:

this application carries out configuration optimization to the end cover subassembly, specifically includes for setting up the end cover subassembly: the insulating part comprises a body part and a supporting convex part, the supporting convex part is arranged on the body part, the supporting convex part and the body part enclose a first accommodating area, and the first accommodating area and the supporting convex part are arranged on the same side of the body part; the end cover and the insulating piece are sequentially arranged in the first direction, and the end cover is arranged on one side of the body part, which is far away from the supporting convex part; the first direction is a protruding direction of the supporting convex part relative to the body part; the current collector comprises a first current collecting part and a second current collecting part connected with the first current collecting part, the first current collecting part is arranged in the first accommodating area, and the second current collecting part is arranged on one side, away from the body part, of the supporting convex part; the first current collecting portion and the supporting convex portion are in limit fit towards the first direction.

It can be seen that can realize the location and the support to the mass flow body through setting up the support convex part for under the user state of end cover subassembly, the mass flow body receives the extrusion of electric core, still can keep positional stability, and then improves the stability of electric conduction, and improves the assembly precision and the assembly efficiency of end cover subassembly.

Simultaneously, the setting in first accommodation area for at least part place high position of mass flow body overlaps with the support convex part place high position, thereby realizes space reuse, makes end cover subassembly structure compacter, and space utilization is higher.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required to be used in the embodiments will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

Fig. 1 is a top view of a battery disclosed herein;

FIG. 2 isbase:Sub>A cross-sectional view taken along line A-A of FIG. 1 as disclosed herein;

FIG. 3 is an enlarged view at I of FIG. 2 of the present disclosure;

FIG. 4 is a cross-sectional view taken along line B-B of FIG. 1 as disclosed herein;

FIG. 5 is an enlarged view at II of FIG. 4 of the present disclosure;

FIG. 6 is an enlarged view at III of FIG. 5 of the present disclosure;

FIG. 7 is a schematic illustration of a current collector removal configuration of an end cap assembly according to the present disclosure;

fig. 8 is a schematic structural view of an end cap assembly assembled current collector disclosed herein;

FIG. 9 is a cut-away schematic view of an end cap assembly of the present disclosure;

FIG. 10 is a schematic view, in half section, of an insulator of the present disclosure.

Description of reference numerals:

800-end cover component, 810-mounting hole,

100-an insulating member,

10-supporting convex parts,

110-a first convex part, 114-a first side surface, 113-a first curved surface, 111-a first subsidiary convex part, 112-a second subsidiary convex part, 115-a first supporting end surface, 116-a second supporting end surface,

120-second convex part, 124-second side surface, 123-second curved surface, 121-third convex part, 122-fourth convex part, 125-third supporting end surface, 126-fourth supporting end surface,

130-a body part,

141-a first accommodation area, 142-a second accommodation area,

150-weight reduction groove, 160-flow guide channel, 161-first flow guide port, 162-second flow guide port, 170-limit convex part, 180-breather hole, 190-breather hole,

200-end cap, 210-pressure relief hole,

300-current collector, 310-guiding groove, 301-first current collecting part, 302-second current collecting part,

400-conducting member,

401-first conductor, 411-first column portion, 412-first chassis portion 402-second conductor, 421-second column part, 422-second chassis part,

500-explosion-proof valve,

600-shell body, 610-containing cavity,

700-electric core.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the present invention, the terms "upper", "lower", "left", "right", "front", "rear", "top", "bottom", "inner", "outer", "vertical", "horizontal", "lateral", "longitudinal", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings. These terms are used primarily to better describe the invention and its embodiments, and are not intended to limit the indicated devices, elements or components to a particular orientation or to be constructed and operated in a particular orientation.

Moreover, some of the above terms may be used in other meanings besides orientation or positional relationship, for example, the term "upper" may also be used in some cases to indicate a certain attaching or connecting relationship. The specific meaning of these terms in the present invention can be understood by those of ordinary skill in the art as appropriate.

Furthermore, the terms "mounted," "disposed," "provided," "connected," and "connected" are to be construed broadly. For example, it may be a fixed connection, a removable connection, or a unitary construction; can be a mechanical connection, or an electrical connection; may be directly connected, or indirectly connected through intervening media, or may be in internal communication between two devices, elements or components. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art.

Moreover, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific type and configuration may or may not be the same), and are not used to indicate or imply the relative importance or number of the indicated devices, elements, or components. "plurality" means two or more unless otherwise specified.

Referring to fig. 1 to 10, the present application discloses an end cap assembly 800 for a battery, including:

the insulating member 100, the insulating member 100 can provide insulation protection for the end cap assembly 800, so the insulating member 100 can be made of plastic. The insulating member 100 may include a body portion 130 and a supporting protrusion 10, the supporting protrusion 10 being provided to the body portion 130. The supporting protrusion 10 and the body 130 enclose a first receiving area 141, and the first receiving area 141 and the supporting protrusion 10 are disposed on the same side of the body 130.

The end caps 200 and 200 are the mounting bases of the end cap assembly 800 to integrate other components, specifically, the end caps 200 and the insulating member 100 may be sequentially disposed in a first direction, and the end caps 200 are disposed on the side of the main body 130 away from the supporting protrusion 10. Wherein the first direction is a protruding direction of the supporting protrusion 10 with respect to the body portion 130.

The current collector 300 and the current collector 300 are used as conductive parts arranged on the end cap assembly 800, and the end cap assembly 800 can be electrically conductive by matching with the later conductive part 400, so as to realize the transmission of electric energy on the battery.

The current collector 300 may include a first current collecting portion 301 and a second current collecting portion 302, and the second current collecting portion 302 is connected to the first current collecting portion 301. The first current collecting portion 301 is disposed in the first receiving area 141, and the second current collecting portion 302 is disposed on a side of the supporting protrusion 10 facing away from the body portion 130. In the use state of the end cap assembly 800, the second collecting portion 302 may be in a limit fit with the support protrusion 10 toward the first direction.

It should be noted that the usage status of the end cap assembly 800 specifically includes: the end cap assembly 800 is installed in a battery. Generally, the current collector 300 is a flexible current collecting plate, and is mounted to the end cap assembly 800 in a bent or curled manner, and when the end cap assembly 800 is not used, the current collector 300 is not pressed by other parts, and at this time, the deformation of the current collector 300 is small, so that the second current collecting portion 302 may not be in limit engagement with the supporting protrusion 10 in a non-use state of the end cap assembly 800, and at this time, a certain interval is maintained between the second current collecting portion 302 and the supporting protrusion 10.

In a using state of the end cap assembly 800, the end cap assembly 800 is mounted on a casing of a battery, at this time, the current collector 300 faces the battery core 700 of the battery, and the current collector 300 and the battery core 700 generate a certain degree of mutual extrusion, the extrusion force aggravates a deformation range of the current collector 300, so that a bending range and a curling range of the current collector 300 are larger, at this time, more parts of the current collector 300 approach one side of the body portion 130, and the current collector 300 and the supporting protrusion 10 are attached to each other, that is, the second current collecting portion 302 and the supporting protrusion 10 are in limit fit in the first direction.

It can be seen that, by providing the supporting protrusions 10, the current collector 300 can be positioned and supported, so that in a use state of the end cap assembly 800, the current collector 300 can maintain positional stability even if being squeezed by the battery cell 700, and thus stability of electrical conduction is improved, and assembly accuracy and assembly efficiency of the end cap assembly 800 are improved.

Meanwhile, the first accommodating area 141 is arranged, so that the height position of at least part of the current collector 300 is overlapped with the height position of the supporting convex part 10, thereby realizing space reuse, and enabling the end cover assembly 800 to have a more compact structure and a higher space utilization rate.

Alternatively, the support protrusion 10 may be a structure of a support ring to stably support the current collector 300. Alternatively, the support protrusion 10 may be provided in plurality to improve the stability of the support.

In the present application, the supporting protrusion 10 may include a first protrusion 110 and a second protrusion 120, the first protrusion 110 and the second protrusion 120 are disposed on the same side of the body 130, and a first receiving area 141 is formed between the first protrusion 110 and the second protrusion 120. The second collecting portion 302 may be disposed at a side of the first protrusion 110 facing away from the body portion 130 and at a side of the second protrusion 120 facing away from the body portion 130.

In this way, the first protrusion 110 and the second protrusion 120 may support the current collector 300 from two different positions, respectively, and compared to a manner in which more protrusions are disposed, only two protrusions are disposed, which is more convenient and economical in processing, thereby taking into account the support stability and the processing economy of the insulator 100.

Alternatively, the height of the first protrusion 110 protruding with respect to the body portion 130 may be the same as the height of the second protrusion 120 protruding with respect to the body portion 130. This ensures that both the first convex portion 110 and the second convex portion 120 are sufficiently bonded to the current collector 300, and further improves the support stability.

In other alternative embodiments, the height of the first protrusion 110 protruding with respect to the body portion 130 may be different from the height of the second protrusion 120 protruding with respect to the body portion 130. One of first convex part 110 and second convex part 120 can support and spacing current collector 300 like this, and the other can form the air gap with current collector 300 between, and the pressure release when battery internal pressure is too big is convenient for in the formation of air gap, and then improves the air current circulation nature of battery when guaranteeing to support.

Optionally, at least one of the first protrusion 110, the second protrusion 120 and the body portion 130 may be provided with a weight-reducing groove 150 to reduce the overall weight of the insulator 100 and improve the weight-reducing effect of the battery.

Optionally, the insulator 100 may be provided with a flow guide channel 160, the flow guide channel 160 having a first flow guide opening 161 and a second flow guide opening 162. The guide passage 160 communicates with the lightening groove 150 through a first guide opening 161, and a second guide opening 162 is formed on the surface of the insulator 100. The second diversion opening 162 is communicated with the accommodating cavity 610 of the battery, so that the electrolyte remaining in the weight-reducing groove 150 can be guided back to the inside of the battery to prevent corrosion caused by the remaining electrolyte.

Alternatively, the weight-reduction grooves 150 may be provided in the first convex portion 110, and/or the weight-reduction grooves 150 may be provided in the second convex portion 120, so that the weight-reduction grooves 150 may be provided larger to improve the weight-reduction effect.

Optionally, the diversion channel 160 may be opened along a first direction, and the weight reduction groove 150 and the diversion channel 160 may be sequentially communicated along the first direction, which is the same as the direction of gravity, so that, due to the consistent opening directions, and under the driving action of gravity, the diversion efficiency can be further improved, and the diversion speed is further increased.

Optionally, the second diversion opening 162 may be provided in plurality to further improve diversion efficiency.

Optionally, end cap assembly 800 may also include conductive member 400. The end cap assembly 800 is provided with a mounting hole 810, and the mounting hole 810 is sequentially penetratingly disposed at the end cap 200 and the insulating member 100 to communicate with the first receiving region 141. The conductive member 400 is provided at the mounting hole 810 to electrically connect the first current collecting portion 301. In this way, the conduction of the electric energy in the battery can be realized, specifically, the current collector 300 can be respectively connected to the conductive piece 400 and the battery cell 700 in the battery, wherein the battery cell 700 is an energy storage component of the battery, and the conductive piece 400 can be used as a conductive terminal of the battery, so that the battery cell 700, the current collector 300 and the conductive piece 400 form a conductive loop, and further are electrically connected to other external devices, thereby realizing the charging and discharging of the battery.

Alternatively, the number of conductors 400 may be two, and the two conductors 400 are a first conductor 401 and a second conductor 402, respectively, and are spaced apart from each other to avoid interference, such as a positive pole and a negative pole. The end cap assembly 800 is provided with two mounting holes 810, and one of the two mounting holes 810 is provided with the first conductor 401 and the other is provided with the second conductor 402, so that the rationality of electric conduction can be improved.

Alternatively, the first conductor 401 may be provided separately from the first protrusion 110 and the second protrusion 120; the second conductor 402 may be provided at a distance from the first protrusion 110 and the second protrusion 120, respectively. Thus, assembly interference can be avoided, and damage caused by mutual extrusion can be prevented.

Alternatively, the first conductor 401 and the second conductor 402 may be both located between the first protrusion 110 and the second protrusion 120. The first conductor 401 is disposed near the first protrusion 110, and the second conductor 402 is disposed near the second protrusion 120. This may improve layout rationality to avoid other components or structures, such as subsequent vents 180.

Alternatively, the current collector 300 may protrude into the mounting hole 810 through the first receiving region 141 to electrically connect the conductive members 400. In the present application, the conductive member 400 is disposed to extend into the first receiving area 141 through the mounting hole 810 to electrically connect the current collector 300, and specifically, the first conductive body 401 may include a first cylindrical portion 411 and a first chassis portion 412 that are connected to each other, and the second conductive body 402 may include a second cylindrical portion 421 and a second chassis portion 422 that are connected to each other. At least part of the first cylindrical portion 411 and at least part of the second cylindrical portion 421 are respectively disposed in a mounting hole 810, for example, the first cylindrical portion 411 and the second cylindrical portion 421 are all accommodated in the mounting hole 810, or the first cylindrical portion 411 and the second cylindrical portion 421 protrude out of the mounting hole 810, so as to facilitate electrical connection with an external component. The first chassis part 412 and the second chassis part 422 are each provided at the first accommodation region 141, and are each electrically connected to the first current collecting portion 301. Such arrangement is reasonable in layout, and can improve the connection stability between the conductive member 400 and the current collector 300.

Alternatively, the conductive member 400 and the current collector 300 may be sequentially disposed toward the first direction. The cross-sectional area of the first column portion 411 in the first direction is smaller than the cross-sectional area of the first chassis portion 412 in the first direction, so that the contact area between the first conductive body 401 and the current collector 300 is increased. Similarly, the area of the cross section of the second column portion 421 towards the first direction is smaller than the area of the cross section of the second chassis portion 422 towards the first direction, so as to increase the contact area between the second conductor 402 and the current collector 300. It can be seen that the arrangement mode of increasing the contact area can improve the electric conduction performance of the battery.

Optionally, the first chassis part 412 and the second chassis part 422 may be both attached to the bottom surface of the first accommodation region 141 in a manner of welding, which may further improve the stability of connection and may also improve the compactness of the device.

Alternatively, one surface of the body portion 130 on which the first protrusion 110 and the second protrusion 120 are disposed is a first base surface. The first chassis part 412 and the second chassis part 422 are both circular, the first chassis part 412 forms a first projection on a first base plane, the second chassis part 422 forms a second projection on the first base plane, the first convex part 110 forms a third projection on the first base plane, the second convex part 120 forms a fourth projection on the first base plane, and the first projection and the second projection are both located between the third projection and the fourth projection.

The straight-line distance of a connecting line between the center of the first projection and the center of the second projection is L ₁ . The extension line of the connecting line between the center of the first projection and the center of the second projection forms a first intersection point with the outer edge line of the third projection close to one side of the first projection, the extension line of the connecting line between the center of the first projection and the center of the second projection forms a second intersection point with the outer edge line of the fourth projection close to one side of the second projection, and the linear distance between the first intersection point and the second intersection point is L ₂ . Then there are:

1/3≤L ₁ /L ₂ ≤4/5。

this allows control of the gap between first chassis portion 412 and first protrusion 110, and control of the gap between second chassis portion 422 and second protrusion 120. In which, too small a gap may cause assembly interference to cause extrusion, while too large a gap may cause space waste, which is disadvantageous to miniaturization of the apparatus. By adopting the clearance control mode, the space can be reasonably planned, and the compactness of the layout is ensured while the non-interference is ensured.

Optionally, a face of the first convex portion 110 facing the first accommodating area 141 is a first side face 114, the first side face 114 has a first curved face 113, and the first curved face 113 is disposed concentrically with the first chassis portion 412; and/or a side surface 124 of the second convex portion 120 facing the first accommodating area 141, the second side surface 124 having a second curved surface 123, the second curved surface 123 being concentrically disposed with the second chassis portion 422.

The concentric arrangement mode can ensure that the gap between the first convex part 110 and the first chassis part 412 is uniform, the gap between the second convex part 120 and the second chassis part 422 is uniform, and the interference in the assembling process is further prevented.

In some embodiments, the first protrusion 110 and the first conductor 401, and the second protrusion 120 and the second conductor 402 may be attached to each other to improve space utilization.

Specifically, the side of the first protrusion 110 facing the first accommodation area 141 is a first side surface 114, and the outer peripheral surface of the first chassis part 412 may contact the first side surface 114; and/or, a side of the second protrusion 120 facing the first receiving area 141 is the second side surface 124, and an outer circumferential surface of the second chassis portion 422 may contact the second side surface 124. Through this kind of laminating design, compactness when can improving the assembly to improve end cover assembly 800's space utilization.

Alternatively, the first side surface 114 may have a first curved surface 113, the first curved surface 113 being disposed concentrically with the first chassis part 412 and being disposed in close contact with the outer peripheral surface of the first chassis part 412, and/or the second side surface 124 may have a second curved surface 123, the second curved surface 123 being disposed concentrically with the second chassis part 422 and being disposed in close contact with the outer peripheral surface of the second chassis part 422. The parts that fit each other like this are more for space utilization is higher, more does benefit to the miniaturized design of end cover subassembly 800.

Optionally, on the basis of the above-mentioned fitting design, at least one of the first convex portion 110 and the first chassis portion 412 may have elasticity; and/or at least one of the second protrusion 120 and the second chassis portion 422 may have elasticity, which may buffer the mutual compression that may occur during assembly. Specifically, when the first convex portion 110 is attached to the first chassis portion 412 or the second convex portion 120 is attached to the second chassis portion 422, the elastic design can avoid rigid contact between the first convex portion and the second convex portion, thereby effectively avoiding assembly interference and preventing extrusion damage.

In some embodiments, the height of first chassis portion 412 facing the first direction and the height of second chassis portion 422 facing the first direction are both less than or equal to the height of first protrusion 110 facing the first direction; and/or the height of the first chassis part 412 facing the first direction and the height of the second chassis part 422 facing the first direction are both less than or equal to the height of the second convex part 120 facing the first direction.

Due to the design, the first chassis part 412 and the second chassis part 422 are completely accommodated in the first accommodating area 141 and do not protrude out of the first accommodating area 141, so that the first chassis part 412 or the second chassis part 422 is prevented from extruding components such as the current collector 300, and assembly interference is more effectively prevented.

Optionally, the insulating member 100 may further include a limiting protrusion 170, the limiting protrusion 170 is disposed on the body portion 130, and the limiting protrusion 170 is in limiting fit with the current collector 300 in a second direction, where the first direction intersects with the second direction, for example, the first direction is perpendicular to the second direction, where the second direction may be understood as a horizontal transverse direction. It can be seen that, through the design of the limiting convex part 170, the installation dislocation of the current collector 300 can be prevented, the quick positioning of the installation of the current collector 300 can be more effectively realized, and the installation efficiency is very easy to improve.

Alternatively, the current collector 300 may be provided with a guide groove 310, and the current collector 300 is fitted with the limit protrusion 170 in the first direction through the guide groove 310. Like this at the installation of mass flow body 300, through the direction cooperation, can let on the mass flow body 300 packs into insulating part 100 along the first direction, prevent to appear beat, dislocation etc. in the installation, and then prevent to collide with the damage, improve the installation effectiveness simultaneously.

Meanwhile, it should be noted that, by the mutual engagement of the guide groove 310 and the limiting convex part 170, the current collector 300 can be prevented from moving in any direction on the plane perpendicular to the first direction after being assembled, and the limitation on the current collector 300 can be more effectively realized.

Optionally, the limiting convex part 170 may be a cylindrical boss, and the guiding groove 310 may be an arc-shaped groove, which is simple to set and has a good matching effect. In this arrangement, the first direction may be understood as an axial direction of the limit projection 170, and the second direction may be understood as a radial direction of the limit projection 170.

Alternatively, the position-limiting protrusion 170 may be located at the first receiving region 141, and the position-limiting protrusion 170 is in position-limiting engagement with the first current collecting portion 301. Due to the design, more design elements are integrated in the first accommodating area 141, space reuse is more effectively realized, and the structural compactness of the end cover assembly 800 is improved.

Alternatively, the protruding height of the position-limiting protrusion 170 relative to the body portion 130 may be smaller than the protruding height of the first chassis portion 412 relative to the body portion 130; and, the height of the protrusion of the position-limiting protrusion 170 with respect to the body portion 130 may be smaller than the height of the protrusion of the second chassis portion 422 with respect to the body portion 130.

As described above, the first chassis part 412 and the second chassis part 422 are used for electrically connecting the current collector 300, so that the height of the limiting convex part 170 is controlled, and the current collector 300 and the limiting convex part 170 can be effectively prevented from being mutually extruded after assembly, thereby effectively preventing assembly interference and avoiding collision and damage.

Alternatively, the protruding height of the position-limiting protrusion 170 relative to the body portion 130 is Ha, the protruding height of the first chassis portion 412 and the second chassis portion 422 relative to the body portion 130 is Hb,

1/4≤Ha/Hb≤5/6。

too short height of the limiting protrusion 170 may have too poor limiting and guiding effects on the current collector 300, and too long height of the limiting protrusion 170 may easily cause extrusion and assembly interference on the current collector 300 after assembly. Therefore, the height of the position-restricting protrusion 170 is controlled within the above-mentioned range, so that both the position-restricting guide performance and the interference prevention performance are achieved.

Optionally, the position-limiting protrusion 170 is disposed close to the first conductor 401 and far from the second conductor 402. The arrangement of the limiting convex part 170 can make the overall layout of the end cover assembly 800 be asymmetrically distributed, thereby playing a fool-proof effect and preventing the first conductor 401 and the second conductor 402 from being assembled and mixed.

In some embodiments, a side of the first protrusion 110 facing away from the body portion 130 may be provided with a first supporting end surface 115, and a side of the second protrusion 120 facing away from the body portion 130 may be provided with a third supporting end surface 125. In the usage state of the end cap assembly 800, the second collecting portion 302 is attached to the first supporting end surface 115 and attached to the third supporting end surface 125.

As described above, in the unused state of the end cap assembly 800, the current collector 300 is not pressed by other components, and at this time, the deformation of the current collector 300 is small, so that the second current collecting portion 302 can maintain a mutual interval with the first supporting end surface 115 and the third supporting end surface 125, and in the used state of the end cap assembly 800, the current collector 300 is pressed by the core 700 to increase the deformation amplitude, so that the second current collecting portion 302 can maintain a close and limit fit with both the first supporting end surface 115 and the third supporting end surface 125.

It can be seen that the surface contact manner can increase the contact area between the first protrusion 110 and the second protrusion 120 and the current collector 300, so that the support is more stable.

Alternatively, at least one of the first and second protrusions 110 and 120 may have elasticity, such as only the first protrusion 110, or only the second protrusion 120, or both the first and second protrusions 110 and 120. Like this first convex part 110, second convex part 120 not only have support and spacing effect of stopping to current collector 300, can also cushion current collector 300's atress, then improve the structural stability after current collector 300 installs.

Alternatively, the hardness of the body portion 130 may be greater than the hardness of the first protrusion 110, and the hardness of the body portion 130 may be greater than the hardness of the second protrusion 120, such as the body portion 130 being a hard plastic and the first protrusion 110 and the second protrusion 120 being a silicone. This may improve the structural stability of the insulator 100 to improve the deformation resistance.

Alternatively, the body portion 130, the first protrusion 110 and the second protrusion 120 may be integrally formed, so that the structural stability is higher, and may be provided as an assembly, which is not described in detail herein.

Alternatively, the first protrusion 110 may include the first and second subsidiary protrusions 111 and 112, and the second protrusion 120 may include the third and fourth subsidiary protrusions 121 and 122.

The height of the first sub-protrusion 111 protruding from the body 130 is smaller than the height of the second sub-protrusion 112 protruding from the body 130. The height of the third sub-protrusion 121 protruding with respect to the body portion 130 is smaller than the height of the fourth sub-protrusion 122 protruding with respect to the body portion 130.

The second current collecting portion 302 is disposed at a side of the first sub-protrusion 111 facing away from the body portion 130, and at a side of the third sub-protrusion 121 facing away from the body portion 130. The second collecting portion 302 is in limit fit with the first and third sub-protrusions 111 and 121 in the first direction. The second sub-protrusion 112 faces away from the body 130, and the fourth sub-protrusion 122 faces away from the body 130, are used for disposing the battery cell 700 of the battery, and are in limited fit with the battery cell 700 in the first direction.

In this way, the insulating member 100 can support and limit the current collector 300 and the battery cell 700, so as to further improve the assembly efficiency of the battery.

Optionally, a side of the first sub-protrusion 111 facing away from the body portion 130 is provided with a first supporting end surface 115, a side of the second sub-protrusion 112 facing away from the body portion 130 is provided with a second supporting end surface 116, a side of the third sub-protrusion 121 facing away from the body portion 130 is provided with a third supporting end surface 125, and a side of the fourth sub-protrusion 122 facing away from the body portion 130 is provided with a fourth supporting end surface 126.

The first supporting end surface 115 and the third supporting end surface 125 are matched with each other to realize supporting limit of the current collector 300, and the second supporting end surface 116 and the fourth supporting end surface 126 are matched with each other. So as to realize the support limit of the battery cell 700. The surface supporting mode can improve the contact area of the current collector 300 and the battery cell 700, and further improve the supporting stability of the current collector 300 and the battery cell 700.

Alternatively, a first receiving region 141 may be formed between the first sub-protrusion 111 and the third sub-protrusion 121, a second receiving region 142 may be formed between the second sub-protrusion 112 and the fourth sub-protrusion 122, the first receiving region 141 and the second receiving region 142 are sequentially communicated, the first collecting portion 301 is disposed at the first receiving region 141, and the second collecting portion 302 is disposed at the second receiving region 142.

Therefore, the insulating part can realize the all-dimensional accommodation of the current collector 300, and the space utilization rate is improved. Meanwhile, the current collector 300 cannot protrude out of the insulating part 100, so that mutual extrusion between the current collector 300 and the battery cell 700 can be effectively prevented in the assembling process, and installation interference is avoided.

Alternatively, the height of the first sub-protrusion 111 protruding with respect to the body portion 130 may be the same as the height of the third sub-protrusion 121 protruding with respect to the body portion 130. Thus, the first and third sub-protrusions 111 and 121 may maintain sufficient contact with the current collector 300, thereby improving support stability.

Of course, the heights of the first sub-protrusion 111 and the third sub-protrusion 121 may be different, so that an air gap is formed between the current collector 300 and the air gap, thereby improving the air flow during pressure relief.

Similarly, the height of the second sub-protrusion 112 protruding relative to the body portion 130 may be the same as the height of the fourth sub-protrusion 122 protruding relative to the body portion 130. In this way, the second sub-protrusion 112 and the fourth sub-protrusion 122 can maintain sufficient contact with the battery cell 700, and thus the support stability is improved.

Of course, the heights of the second sub-protrusion 112 and the fourth sub-protrusion 122 may be different, so that an air gap is formed between the second sub-protrusion and the battery cell 700, and the air circulation during pressure relief is improved.

Optionally, the first side of the second sub-protrusion 112 and the first side of the fourth sub-protrusion 122 are spaced apart from each other to form the ventilation opening 190. The second side of the second sub-lobe 112 and the second side of the fourth sub-lobe 122 are connected to each other such that the second sub-lobe 112 and the fourth sub-lobe 122 are connected to each other to form a split ring, and the ventilation opening 190 is connected end to end with the split ring.

When ventilative mouthful 190 can be used to the battery pressure release, hold the chamber 610 leading-in first holding area 141, the second holding area 142 of gas-liquid with the inflation by the battery, and then discharge. The design of connecting the second sub-protrusion 112 and the fourth sub-protrusion 122 at the side of the opening can improve the structural strength of the insulating member 100, and at the same time, the supporting area of the battery cell 700 can be increased, and the supporting stability can be improved.

Optionally, the end cap 200 may be provided with a pressure relief vent 210, and the pressure relief vent 210 may be provided with an explosion proof valve 500. The body portion 130 may be provided with a vent hole 180, and the pressure relief hole 210, the vent hole 180, the first accommodation area 141 and the second accommodation area 142 are sequentially connected.

Thus, the explosion-proof valve 500 may seal the pressure relief hole 210 under normal operation conditions to maintain the normal operation of the battery. When the internal pressure of the battery is too high, the expanded gas and liquid are collected to the explosion-proof valve 500 through the second containing area 142, the first containing area 141 and the air holes 180, and then the explosion-proof valve 500 is broken, so that the gas and liquid are discharged from the pressure relief hole 210, the pressure relief is completed, and the safety performance of the battery is improved.

In some embodiments, the present application further discloses a battery comprising: a casing 600, a cell 700, and an end cap assembly 800. The housing 600 is provided with a containing cavity 610, the containing cavity 610 has an opening formed in at least one side of the housing 600, the battery cell 700 is provided in the containing cavity 610, and the battery cell 700 may be a winding core formed by winding a positive electrode sheet and a negative electrode sheet. The end cap assembly 800 may be disposed at the opening, the end cap 200, the insulating member 100, and the battery cell 700 are sequentially disposed in the first direction, and the second current collecting portion 302 is electrically connected to the battery cell 700. Among them, since the current collector 300 is supported and limited by the insulating member 100, the installation efficiency can be improved.

Alternatively, the battery cell 700 may be provided to the support protrusion 10. Specifically, the battery cell 700 is disposed on the first protrusion 110 and the second protrusion 120, and is in limit fit with the first protrusion 110 and the second protrusion 120 towards the first direction

As described above, the current collector 300 and the battery cell 700 are supported and limited by the insulator 100 and are at respective designated installation heights, so that the installation efficiency is ensured, installation interference between the current collector and the battery cell is prevented, the current collector and the battery cell are prevented from being damaged by extrusion, and the electrical connection effectiveness can be maintained by stable support.

In some embodiments, the present application further discloses a battery pack comprising: a battery.

In some embodiments, the present application further discloses a powered device comprising: provided is a battery pack. The electric equipment can be an electric automobile, an energy storage device and the like, and is not detailed here.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications or substitutions do not depart from the scope of the invention in its corresponding aspects.

Claims (40)

1. An end cap assembly for a battery, comprising:

an insulating member including a body portion and a supporting protrusion provided at the body portion,

the supporting convex part and the body part enclose a first accommodating area, and the first accommodating area and the supporting convex part are arranged on the same side of the body part;

the end cover and the insulating piece are sequentially arranged in a first direction, and the end cover is arranged on one side of the body part, which is far away from the supporting convex part; the first direction is a projecting direction of the supporting projection with respect to the body portion;

the current collector comprises a first current collecting part and a second current collecting part connected with the first current collecting part, the first current collecting part is arranged in the first accommodating area, and the second current collecting part is arranged on one side, away from the body part, of the supporting convex part;

in the use state of the end cover assembly, the second current collecting part can be in limit fit with the supporting convex part towards the first direction.

2. The end cap assembly of claim 1, wherein the support tab comprises a first tab and a second tab,

the first convex part and the second convex part are arranged on the same side of the body part, and the first accommodating area is formed between the first convex part and the second convex part;

the second current collecting portion is disposed on a side of the first protrusion facing away from the body portion, and on a side of the second protrusion facing away from the body portion.

3. The end cap assembly of claim 2, wherein the first protrusion protrudes relative to the body portion at the same height as the second protrusion protrudes relative to the body portion.

4. The end cap assembly of claim 2, wherein the first protrusion protrudes relative to the body portion at a different height than the second protrusion protrudes relative to the body portion.

5. An end cap assembly according to claim 2, wherein at least one of the first boss, the second boss and the body portion is provided with a weight-reducing slot.

6. The end cap assembly of claim 5, wherein the insulator is provided with a flow channel having a first flow port and a second flow port,

the flow guide channel is communicated with the weight reduction groove through the first flow guide port, and the second flow guide port is formed in the surface of the insulating part.

7. The end cap assembly of claim 6, wherein the flow guide channel is disposed on the first protrusion and/or the flow guide channel is disposed on the second protrusion.

8. The end cap assembly of claim 6, wherein the flow guide channel is open in a first direction, the lightening slot and the flow guide channel are in communication in sequence in the first direction, and the first direction is in line with a direction of gravity.

9. An end cap assembly according to claim 2, further comprising an electrically conductive member,

the end cover assembly is provided with a mounting hole, and the mounting hole sequentially penetrates through the end cover and the insulating piece to be communicated with the first accommodating area;

the conductive member is disposed at the mounting hole to electrically connect the first current collecting part.

10. The end cap assembly of claim 9, wherein the number of conductors is two, the two conductors being a first conductor and a second conductor,

the end cover component is provided with two mounting holes,

one of the two mounting holes is provided with the first conductor, and the other one is provided with the second conductor.

11. The end cap assembly of claim 10, wherein the first electrical conductor is spaced apart from the first protrusion and the second protrusion, respectively,

the second conductor is provided at an interval from the first protrusion and the second protrusion, respectively.

12. An end cap assembly according to claim 10, wherein the first electrical conductor and the second electrical conductor are each located between the first protrusion and the second protrusion,

the first conductor is disposed adjacent to the first protrusion, and the second conductor is disposed adjacent to the second protrusion.

13. The end cap assembly of claim 10, wherein the first electrical conductor comprises a first cylindrical portion and a first chassis portion connected to each other, the second electrical conductor comprises a second cylindrical portion and a second chassis portion connected to each other,

at least part of the first column part and at least part of the second column part are respectively arranged in the mounting hole,

the first chassis section and the second chassis section are both disposed in the first receiving region and are both electrically connected to the first current collecting portion.

14. The end cap assembly of claim 13, wherein the conductive member and the current collector are sequentially disposed in a first direction,

the area of the cross section of the first column portion in the first direction is smaller than the area of the cross section of the first chassis portion in the first direction,

the area of the cross section of the second column portion in the first direction is smaller than the area of the cross section of the second chassis portion in the first direction.

15. An end cap assembly according to claim 13, wherein the face of the body portion on which the first and second projections are disposed is a first base surface,

the first chassis part and the second chassis part are both circular, the first chassis part forms a first projection on the first base plane, the second chassis part forms a second projection on the first base plane,

the first convex part forms a third projection on the first base surface, the second convex part forms a fourth projection on the first base surface,

the first projection, the second projection, and both are located between the third projection and the fourth projection,

the straight-line distance of a connecting line between the center of the first projection and the center of the second projection is L ₁ ，

The extension line of the connecting line between the center of the first projection and the center of the second projection and the outer edge line of one side of the third projection, which is close to the first projection, form a first intersection point,

and (c) a second step of,

a second intersection point is formed by an extension line of a connecting line between the center of the first projection and the center of the second projection and an outer edge line of one side of the fourth projection, which is close to the second projection,

the linear distance between the first intersection point and the second intersection point is L ₂ ，

1/3≤L ₁ /L ₂ ≤4/5。

16. An end cap assembly according to claim 13, wherein a face of the first protrusion facing the first receiving area is a first side face, the first side face having a first curved surface,

the first curved surface and the first chassis part are arranged concentrically;

and/or the presence of a gas in the gas,

one surface of the second convex part facing the first accommodating area is a second side surface, the second side surface is provided with a second curved surface,

the second curved surface and the second chassis portion are concentrically arranged.

17. The end cap assembly of claim 13, wherein a side of the first protrusion facing the first receiving area is a first side surface, and the outer peripheral surface of the first chassis portion is in contact with the first side surface;

and/or the presence of a gas in the atmosphere,

one side of the second convex part facing the first accommodating area is a second side surface, and the outer peripheral surface of the second chassis part is in contact with the second side surface.

18. The end cap assembly of claim 17, wherein the first side has a first curved surface,

the first curved surface is concentric with the first chassis part and is attached to the outer peripheral surface of the first chassis part;

and/or the presence of a gas in the gas,

the second side surface is provided with a second curved surface,

the second curved surface is concentric with the second chassis part and is attached to the outer peripheral surface of the second chassis part.

19. The end cap assembly of claim 17, wherein at least one of the first boss and the first chassis portion is resilient;

and/or the presence of a gas in the gas,

at least one of the second convex portion and the second chassis portion has elasticity.

20. The end cap assembly of claim 13, wherein a height of the first floor section in the first direction and a height of the second floor section in the first direction are each less than or equal to a height of the first protrusion in the first direction;

and/or the presence of a gas in the atmosphere,

the height of the first chassis part facing the first direction and the height of the second chassis part facing the first direction are both smaller than or equal to the height of the second convex part facing the first direction.

21. An end cap assembly according to claim 13, wherein the insulator further comprises a retaining tab provided on the body portion,

the limiting convex part is in limiting fit with the current collector towards a second direction,

the first direction intersects the second direction.

22. The end cap assembly of claim 21, wherein the current collector is provided with guide grooves,

the current collector is matched with the limiting convex part towards the first direction through the guide groove.

23. An end cap assembly according to claim 21, wherein the stop tab is located in the first receiving area,

the limiting convex part is in limiting fit with the first current collecting part.

24. The end cap assembly of claim 21, wherein a height of the stop tab projecting relative to the body portion is less than a height of the first floor portion projecting relative to the body portion, and,

the protruding height of the limiting convex part relative to the body part is smaller than the protruding height of the second chassis part relative to the body part.

25. The end cap assembly of claim 24, wherein the stop tab projects a height H relative to the body portion _a The protruding heights of the first chassis part and the second chassis part relative to the body part are all H _b ，

1/4≤H _a /H _b ≤5/6。

26. The end cap assembly of claim 21, wherein the stop tab is disposed proximate to the first electrical conductor and distal to the second electrical conductor.

27. An end cap assembly according to any one of claims 2 to 26, wherein a side of the first projection facing away from the body portion is provided with a first support end surface, a side of the second projection facing away from the body portion is provided with a third support end surface,

and in the use state of the end cover assembly, the second current collecting part is arranged on the first supporting end face in an attaching mode, and is arranged on the third supporting end face in an attaching mode.

28. The end cap assembly of any one of claims 2-26, wherein at least one of the first protrusion and the second protrusion is resilient.

29. An end cap assembly according to any one of claims 2 to 26, wherein the body portion has a hardness greater than a hardness of the first protrusion, and,

the hardness of the body portion is greater than the hardness of the second protrusion.

30. An end cap assembly according to any one of claims 2 to 26, wherein the body portion, the first protrusion and the second protrusion are integrally formed.

31. The end cap assembly of any one of claims 2-26, wherein the first protrusion comprises a first sub-protrusion and a second sub-protrusion, the second protrusion comprises a third sub-protrusion and a fourth sub-protrusion,

the height of the first sub-projection projecting with respect to the body portion is smaller than the height of the second sub-projection projecting with respect to the body portion,

a height of the third sub-projection projecting with respect to the body portion is smaller than a height of the fourth sub-projection projecting with respect to the body portion,

the second current collecting portion is disposed on a side of the first sub-protrusion facing away from the body portion, and is disposed on a side of the third sub-protrusion facing away from the body portion,

the second current collecting part is in limit fit with the first sub-convex part and the third sub-convex part towards the first direction,

the second sub-convex part deviates from one side of the body part, and the fourth sub-convex part deviates from one side of the body part, is used for arranging the battery cell of the battery, and is in limit fit with the battery cell towards the first direction.

32. The end cap assembly of claim 31, wherein the first sub-protrusion and the third sub-protrusion define therebetween the first receiving area, and the second sub-protrusion and the fourth sub-protrusion define therebetween the second receiving area,

the first containing area and the second containing area are communicated in sequence,

the first current collecting portion is arranged in the first accommodating area, and the second current collecting portion is arranged in the second accommodating area.

33. An end cap assembly according to claim 32, wherein the face of the body portion on which the first and second projections are disposed is a first base surface,

the area of the first accommodating area on the first base surface is smaller than that of the second accommodating area on the first base surface.

34. The end cap assembly of claim 31, wherein a height of the first sub-protrusion protruding with respect to the body portion coincides with a height of the third sub-protrusion protruding with respect to the body portion,

the height of the second sub-projection projecting with respect to the body portion coincides with the height of the fourth sub-projection projecting with respect to the body portion.

35. The end cap assembly of claim 31, wherein the first side of the second sub-lobe and the first side of the fourth sub-lobe are spaced apart from one another to form a vent,

a second side of the second sub-lobe and a second side of the fourth sub-lobe being connected to each other such that the second sub-lobe and the fourth sub-lobe are connected to each other to form a split ring,

the ventilation opening is connected with the split ring end to end.

36. An end cap assembly according to any one of claims 1 to 26, wherein the end cap is provided with a pressure relief vent, the pressure relief vent being provided with an explosion proof valve,

the body part is provided with an air hole,

the pressure relief hole, the air hole and the first containing area are sequentially connected.

37. A battery, comprising: a housing, a cell, and the end cap assembly of any one of claims 1-36,

the shell is provided with an accommodating cavity which is provided with an opening formed on at least one side of the shell,

the battery core is arranged in the accommodating cavity, the end cover component is arranged at the opening,

the end cap, the insulating part and the battery cell are sequentially arranged towards the first direction,

the second current collecting portion is electrically connected with the battery cell.

38. The battery of claim 37, wherein the cell is disposed at the support ledge.

39. A battery pack, comprising: the battery of any one of claims 37 or 38.

40. An electrical device, comprising: a battery pack as claimed in claim 39.

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