CN218448377U - End cover assembly of battery, battery pack and electric equipment - Google Patents

Abstract

The application discloses end cover assembly of battery includes: an end cap; the insulating piece is stacked on one side of the end cover facing the inner cavity of the battery; the pole column sequentially penetrates through the end cover and the insulating part; the adapter is positioned on one side, away from the end cover, of the insulating part, a first groove is formed in one side, away from the end cover, of the adapter, a welding area is arranged at the bottom of the first groove, the welding area corresponds to the pole, and the adapter is connected to the pole in a welding mode through the welding area; and at least part of the first bonding protection piece is bonded and arranged in the first groove so as to be sealed and matched with the welding area. Like this, through the setting of first bonding protection piece, can prevent effectively that the welding slag that is in welding area from dropping to the electrolyte of battery, first bonding protection piece can also bond continuously with protection film isotructure simultaneously to increase the firm in connection nature of protection film, prevent its bonding inefficacy, and then effectively guarantee the insulating properties of protection film. The application also discloses a battery, a battery pack and electric equipment.

Description

End cover assembly of battery, battery pack and electric equipment

Technical Field

The application relates to the technical field of battery assembly, 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 at present, is widely applied to equipment such as electric automobiles and the like, has the advantages of energy conservation, environmental protection and the like, and is a development trend of new energy in the future. In the related art, the assembly of the power battery needs to weld the tab and the adaptor to realize electric conduction, and an insulating film needs to be attached to the tab and the adaptor for insulation protection after welding so as to prevent abnormalities such as short circuit.

However, the insulating film is usually attached to the welding position of the tab and the adaptor in a viscose manner, so that the adhesive is prone to failure and the insulating film falls off under the long-term soaking of electrolyte, thereby causing the failure of insulation protection, and meanwhile, under the condition that the welding position of the tab and the adaptor is exposed for a long time, metal particles such as welding slag and the like at the welding position are prone to falling into a battery core or the electrolyte, thereby causing the short circuit of the battery.

SUMMERY OF THE UTILITY MODEL

The embodiment of the application discloses end cover subassembly, battery package and consumer of battery can solve the correlation technique in the insulating film drop easily, lead to abnormalities such as short circuit easily to appear in the battery, have the problem of potential safety hazard.

To achieve the above object, in a first aspect, the present application discloses an end cap assembly of a battery, comprising: an end cap; the insulating piece is stacked on one side of the end cover facing the inner cavity of the battery; the pole column sequentially penetrates through the end cover and the insulating part; the adapter is positioned on one side, away from the end cover, of the insulating part, a first groove is formed in one side, away from the end cover, of the adapter, a welding area is formed in the bottom of the first groove and corresponds to the pole, and the adapter is connected with the pole in a welding mode through the welding area; and at least part of the first bonding protection piece is bonded and arranged in the first groove so as to be sealed and matched with the welding area.

Optionally, the first adhesive protection member is a resin paste.

Optionally, the protective device further comprises a double-sided adhesive tape, at least a part of the first adhesive protective member is adhered to the first groove through the double-sided adhesive tape, and/or at least a part of the resin adhesive is thermally fused to the first groove.

Optionally, at least a portion of the first adhesive protector protrudes out of the first groove.

In a second aspect, the application discloses a battery, which is characterized by comprising a shell, an electric core and an end cover assembly, wherein the shell is provided with an inner cavity, the electric core is arranged in the inner cavity, and the end cover assembly covers an opening of the shell; the battery cell comprises a core body and a pole lug, wherein the pole lug is respectively connected with the core body and the adapter.

Optionally, the core has a first end face facing the adaptor, the tab includes a first connection plate, the first connection plate connects the first end face, the battery further includes a first protection film, the first protection film includes a first membrane portion, at least a portion of the first membrane portion is attached to a side of the first connection plate facing away from the core to stop between the adaptor and the first connection plate, and/or at least a portion of the first membrane portion is attached to the first end face to stop between the adaptor and the first end face.

Optionally, the protective film further comprises a second protective film, the second protective film comprises a third film portion, the third film portion is attached to one side, away from the first connecting sheet, of the first film portion, and/or the third film portion is attached to one side, away from the first end face, of the first film portion.

Optionally, the second protective film includes a fourth membrane portion, the fourth membrane portion is connected to the third membrane portion, at least part of the fourth membrane portion is attached to one side of the insulating member away from the end cover, and/or at least part of the fourth membrane portion is attached to one side of the adaptor away from the insulating member.

Optionally, the fourth diaphragm portion covers the first adhesive protector, and the fourth diaphragm portion is adhered to the first adhesive protector under the condition that at least part of the first adhesive protector protrudes out of the first groove.

Optionally, the battery cell includes a first battery cell and a second battery cell that are adjacent to each other, and both a first end surface of the first battery cell and a first end surface of the second battery cell are disposed opposite to the end cap assembly; at least part of the second protective film is positioned between the end cover assembly and the first electric core and between the end cover assembly and the second electric core, the number of the third diaphragm parts is two, the third diaphragm parts are respectively connected with the two back sides of the fourth diaphragm part, one of the two third diaphragm parts is attached to the first diaphragm part arranged on the first electric core, and the other one is attached to the first diaphragm part arranged on the second electric core.

Optionally, the first protection film further comprises a second membrane portion connected with the first membrane portion, the tab comprises a second connecting piece, the second connecting piece is connected with the first connecting piece and is connected with the adapter in a welding mode, at least part of the second membrane portion is attached to one side, away from the adapter, of the second connecting piece, at least part of the second membrane portion is attached to one side, away from the end cover, of the insulating piece, and at least part of the fourth membrane portion is attached to one side, away from the tab, of the second membrane portion.

Optionally, the adaptor is provided with an adaptor port, a second bonding protection member is arranged in the adaptor port, the fourth membrane portion covers the second bonding protection member, and the second bonding protection member bonds the fourth membrane portion under the condition that at least part of the second bonding protection member protrudes out of the adaptor port.

Optionally, the hardness of the second protective film is greater than the hardness of the first protective film.

Optionally, the end cover assembly is provided with two adapters which are a first adapter and a second adapter respectively; the number of the second protective films is two, one of the two second protective films is attached to the first adaptor, and the other one of the two second protective films is attached to the second adaptor; the insulating part is provided with a pressure relief hole, and the pressure relief Kong Weiyu is arranged between the first adapter and the second adapter and between the two second protective films.

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 assembly.

Compared with the prior art, the beneficial effects of this application are:

this application carries out configuration optimization through to the end cover subassembly, include: an end cap; the insulating piece is stacked on one side of the end cover facing the inner cavity of the battery; the pole column sequentially penetrates through the end cover and the insulating part; the adapter is positioned on one side, away from the end cover, of the insulating part, a first groove is formed in one side, away from the end cover, of the adapter, a welding area is arranged at the bottom of the first groove, the welding area corresponds to the pole, and the adapter is connected to the pole in a welding mode through the welding area; and at least part of the first bonding protection piece is bonded and arranged in the first groove so as to be sealed and matched with the welding area.

Like this, through the setting of first bonding protection piece, can effectively prevent to be in welding area's welding slag and drop to the electrolyte of battery, first bonding protection piece can also bond continuously with protection film isotructure simultaneously to increase the firm in connection nature of protection film, prevent its bonding inefficacy, and then effectively guarantee the insulating properties of protection film.

To sum up, the setting of first bonding protection piece can effectively prevent that the welding slag from dropping, improves the insulating protection performance to the battery, and then improves the security performance of battery.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, and 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 these drawings without creative efforts.

FIG. 1 is a schematic structural view of an end cap assembly according to the present disclosure;

fig. 2 is an exploded view of a battery of the present disclosure;

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

FIG. 4 is an exploded view of the first protective film of FIG. 2 after installation as disclosed herein;

FIG. 5 is a schematic diagram of a back side unfolded state of a battery as disclosed herein;

FIG. 6 is a back-folded configuration of FIG. 5 according to the present disclosure;

FIG. 7 is a schematic illustration of a front view of FIG. 5 according to the present disclosure;

fig. 8 is a schematic structural diagram of a battery cell disclosed in the present application;

FIG. 9 is a half-section block diagram of a battery of the present disclosure;

fig. 10 is an enlarged view at II of fig. 9 of the present disclosure.

Description of reference numerals:

600-end cap component,

100-end cap,

200-an insulating member,

210-a pressure relief hole,

300-pole column,

400-an adapter piece,

410-a first groove, 401-a first adapter, 402-a second adapter, 420-an adapter,

510-first adhesive protector, 520-second adhesive protector,

700-electric core,

710-core, 711-first end face,

720-pole ear, 721-first connecting piece, 722-second connecting piece,

701-first battery cell, 702-second battery cell,

810-first protective film,

811-first diaphragm portion, 812-second diaphragm portion,

820-a second protective film,

821-third diaphragm portion, 822-fourth diaphragm portion.

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 efforts all 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 to indicate other meanings besides the orientation or positional relationship, for example, the term "on" may also be used to indicate some kind of attachment or connection relationship in some cases. 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.

Furthermore, the terms "first," "second," and the like, are used primarily to distinguish one device, element, or component from another (the specific nature and configuration may be the same or different), 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.

In the correlation technique, need paste after the utmost point ear of battery and the adaptor and establish the insulating film and carry out insulation protection, prevent to appear unusually such as short circuit, but the insulating film bonds the inefficacy easily under the long-term soaking of electrolyte, can no longer provide effective insulation protection like this, and the welding department of utmost point ear and adaptor exposes for a long time simultaneously, can lead to metal particles such as welding slag to drop to the electrolyte in, can cause anomalies such as short circuit like this, reduces battery safety performance. To address this issue, the present application discloses an end cap assembly 600 for a battery, as described in detail below:

referring to fig. 1 to 10, the present application discloses an end cap assembly 600 for a battery, wherein the end cap assembly 600 may include: the terminal cover 100, the insulating member 200, the pole 300, the adaptor 400, and the first adhesion protector 510.

Where the end cap 100 is the mounting base for the end cap assembly 600, the insulator 200 may be stacked on the side of the end cap 100 facing the internal cavity of the battery, such that the insulator 200 may separate the end cap 100 from the cell 700 of the battery to provide insulation protection.

The post 300 and the adaptor 400 are both electrically conductive components disposed on the end cap assembly 600. Specifically, the terminal 300 sequentially penetrates through the end cover 100 and the insulating member 200, the adaptor 400 is located on one side of the insulating member 200 departing from the end cover 100, and a first groove 410 is arranged on one side of the adaptor 400 departing from the end cover 100, that is, the first groove 410 faces the inner cavity of the battery. The bottom of the first groove 410 is provided with a welding area, the welding area corresponds to the pole 300, the adaptor 400 is welded to the pole 300 through the welding area, and meanwhile, the adaptor 400 is connected to the battery cell 700, so that the pole 300, the adaptor 400 and the battery cell 700 are sequentially connected to form a conductive loop, and the battery is electrically conductive.

At least a portion of the first adhesive protector 510 may be adhesively disposed in the first groove 410 to provide a sealing fit to the welding area. Like this, through the setting of first bonding protection piece 510, can effectively prevent to be in welding area's welding slag and drop to the electrolyte of battery, first bonding protection piece 510 can also bond continuously with protection film isotructure simultaneously to increase the firm in connection nature of protection film, prevent its bonding inefficacy, and then effectively guarantee the insulating properties of protection film.

To sum up, the setting of first bonding protection piece 510 can effectively prevent that the welding slag from dropping, improves the insulating protection performance to the battery, and then improves the security performance of battery.

Optionally, first bonding protection piece 510 can be the resin glue, and like this in the electric conduction process of battery, the resin glue receives the adverse conditions influence less, specifically, the resin glue in the high temperature environment of utmost point post 300 and adaptor 400's welding department to and in the long-term soaking process of electrolyte, all can keep effectual adhesive force, further guarantee the security performance of battery.

Optionally, the end cap assembly 600 may further include a double-sided adhesive tape, and at least a portion of the first adhesion protector 510 may be adhered to the first groove 410 by the double-sided adhesive tape, so that the adhesion strength of the first adhesion protector 510 may be improved, and the safety performance of the battery may be further ensured.

Alternatively, at least a portion of the resin paste may be thermally fused to the first groove 410 to improve the bonding strength of the first bonding protection member 510, thereby further ensuring the safety of the battery.

Alternatively, at least a portion of the first adhesive protector 510 may protrude out of the first groove 410, and thus the first adhesive protector 510 is provided with a large volume so as to have a greater adhesive force.

In a second aspect, the present application also discloses a battery, which may include a housing, a cell 700, and an end cap assembly 600. The housing has an interior cavity, the cell 700 is disposed in the interior cavity of the housing, and the end cap assembly 600 covers the opening of the housing. The battery cell 700 may include a core 710 and tabs 720, the tabs 720 respectively connecting the core 710 and the adaptor 400 to make the battery electrically conductive. It can be seen that, due to the arrangement of the first adhesive protection member 510, welding slag can be prevented from dropping into the inner cavity of the battery at the welding position of the adaptor 400 and the pole 300, that is, at the position of the first groove 410, thereby avoiding the occurrence of abnormalities such as short circuit and the like, and effectively ensuring the power utilization safety.

Optionally, the core 710 has a first end surface 711 facing the adapter 400, and the tab 720 includes a first connecting piece 721, and the first connecting piece 721 is connected to the first end surface 711. The battery further includes a first protective film 810, the first protective film 810 includes a first membrane portion 811, at least a portion of the first membrane portion 811 is attached to a side of the first connecting piece 721 facing away from the core body 710 to be stopped between the adaptor 400 and the first connecting piece 721, and/or at least a portion of the first membrane portion 811 is attached to the first end surface 711 to be stopped between the adaptor 400 and the first end surface 711.

First, the structure of the battery is described, and the configuration in fig. 5 is not the final configuration of the battery, but the battery is in an unfolded configuration to facilitate attaching the first adhesive protection member 510, the first protection film 810, and the like, and to facilitate assembling work such as welding the adaptor 400 and the battery cell 700, after the assembly is completed, the battery cell 700 needs to be turned over to switch the battery to the folded configuration in fig. 6, and then be loaded into the battery case. The reason why the first diaphragm portion 811 is provided is explained below:

as can be seen from fig. 1 to 4, in the present application, electrical energy is electrically conducted through the core 710, the first connecting piece 721, the later second connecting piece 722, the adaptor 400, and the pole 300 in sequence. As will be understood in conjunction with the above description of the cell structure: the first membrane part 811 is attached to the first connecting piece 721, so that the first connecting piece 721 and the adapter 400 can be prevented from being directly contacted to form a short circuit; the first diaphragm portion 811 is attached to the first end surface 711, so that the core 710 and the interposer 400 are prevented from being in direct contact to form a short circuit, and insulation protection is achieved. As described above, by providing the first diaphragm portion 811, it is possible to prevent an abnormality such as a short circuit and to ensure the effectiveness of electrical conduction.

Optionally, the battery may further include a second protective film 820, the second protective film 820 may include a third diaphragm portion 821, and the third diaphragm portion 821 may be applied to a side of the first diaphragm portion 811 facing away from the first connecting piece 721, so as to better prevent a short-circuit contact between the first connecting piece 721 and the adaptor 400. And/or, the third membrane portion 821 may be applied to a side of the first membrane portion 811 facing away from the first end surface 711, so as to better prevent the core 710 and the interposer 400 from directly contacting to form a short circuit. It can be seen that through the setting of third diaphragm portion 821, can cooperate first diaphragm portion 811 to realize duplicate protection, more effective realization insulation protection, more effective realization electric conduction.

Optionally, the second protective film 820 may further include a fourth film part 822, and the fourth film part 822 is connected to the third film part 821. At least part of the fourth diaphragm portion 822 is attached to the side of the insulating member 200 away from the end cap 100, so that the fourth diaphragm portion 822 is matched with the third diaphragm portion 821, the adhesion effect of the second protective film 820 between the end cap assembly 600 and the battery cell 700 is improved, and the second protective film 820 further has a supporting effect, so that the first protective film 810 is supported, and the first protective film 810 is better attached to the battery cell 700, the adaptor 400 and the like.

And/or at least a portion of the fourth diaphragm portion 822 may also be applied to a side of the interposer 400 facing away from the insulator 200, such that the fourth diaphragm portion 822 may better isolate the interposer 400 from the core 710, the first connection tab 721, etc., to provide insulation protection against shorting contact.

Optionally, the fourth diaphragm portion 822 may cover the first adhesion protector 510 to increase the adhesion area of the fourth diaphragm portion 822, so as to increase the adhesion of the second protection film 820 on the battery. And under the condition that at least part of the first adhesion protection piece 510 protrudes out of the first groove 410, the fourth diaphragm portion 822 is adhered to the first adhesion protection piece 510 to improve adhesion stability, so that the adhesion effect of the second protection film 820 can be improved, and the second protection film 820 is more stably connected to the battery.

Optionally, the battery cell 700 may include a first battery cell 701 and a second battery cell 702 that are adjacent to each other, and both the first end face 711 of the first battery cell 701 and the first end face 711 of the second battery cell 702 are disposed opposite to the end cap assembly 600, so that the capacity of the battery may be increased, and more electric energy may be transmitted.

Meanwhile, at least a portion of the second protective film 820 may be located between the end cap assembly 600 and the first cell 701, and between the end cap assembly 600 and the second cell 702. The number of the third membrane portions 821 is two, and the two third membrane portions 821 are respectively connected to two opposite sides of the fourth membrane portion 822, one of the two third membrane portions 821 is attached to the first membrane portion 811 disposed on the first electrical core 701, and the other one of the two third membrane portions 821 is attached to the first membrane portion 811 disposed on the second electrical core 702, so that the second protective film 820 has a U-shaped or n-shaped structure, so as to provide a more stable supporting effect, increase the adhesion force of the second protective film 810 on the battery, and improve the adhesion force of the first protective film 810 on the battery.

Optionally, the first protective film 810 further includes a second diaphragm portion 812 connected to the first diaphragm portion 811. The tab 720 includes a second attachment tab 722, the second attachment tab 722 being connected to the first attachment tab 721 and being welded to the adapter 400.

At least part of the second diaphragm portion 812 is applied to the side of the second web 722 facing away from the interposer 400, at least part of the second diaphragm portion 812 is applied to the side of the insulator 200 facing away from the end cap 100, and at least part of the fourth diaphragm portion 822 is applied to the side of the second diaphragm portion 812 facing away from the tab 720.

It can be seen that, by the arrangement of the second diaphragm portion 812, metal particles such as welding slag at the welding position of the second connecting piece 722 and the adaptor 400 can be blocked by the second diaphragm portion 812, so as to prevent the metal particles such as welding slag from entering into the electrolyte to cause short circuit and the like.

Meanwhile, as described above, the electrical energy is conducted through the core 710, the first connecting piece 721, the second connecting piece 722, the interposer 400 and the pole 300, and the second diaphragm portion 812 and the fourth diaphragm portion 822 can cooperate with each other to provide dual protection, so as to more effectively prevent the second connecting piece 722, the interposer 400 and the core 710 from making short circuit contact.

Alternatively, the adaptor 400 may be provided with the adaptor port 420, the second adhesion protection member 520 is provided in the adaptor port 420, and the fourth diaphragm portion 822 covers the second adhesion protection member 520 so as to have a larger adhesion area. Meanwhile, under the condition that at least part of the second adhesion protection member 520 protrudes out of the adapter 420, the second adhesion protection member 520 adheres to the fourth diaphragm portion 822, so that the adhesion stability of the fourth diaphragm portion 822 is improved, and the adhesion effect of the second protection film 820 on the battery is further improved.

Alternatively, the hardness of the second protective film 820 may be greater than that of the first protective film 810, so that the supporting effect of the second protective film 820 on the first protective film 810 may be improved to more effectively attach the first protective film 810 to the battery.

Alternatively, a total of two adapters 400 are provided for the endcap assembly 600, first adapter 401 and second adapter 402, respectively, where first adapter 401 and second adapter 402 can be understood to be a positive adapter and a negative adapter.

The number of the second protection films 820 is two, one of the two second protection films 820 is attached to the first adaptor 401, and the other one is attached to the second adaptor 402, so as to support the first protection film 810 at the position of the first adaptor 401, and support the first protection film 810 at the position of the second adaptor 402, and provide insulation protection to prevent short circuit contact.

The insulating member 200 may be provided with a pressure relief hole 210 to timely discharge gas and liquid generated by the expansion inside the battery. The pressure relief hole 210 is located between the first adapter 401 and the second adapter 402, and between the two second protection films 820, and the mode of separately attaching the two second protection films 820 can prevent the pressure relief hole 210 from being blocked, so that the pressure relief smoothness of the pressure relief hole 210 is ensured.

The installation order of this application battery is as follows:

the parts to be assembled, such as the end cap assembly 600, the cell 700, etc., are prepared.

The first bonding protection piece 510 is bonded and arranged in the first groove 410 of the adapter 400 so as to seal the welding area between the adapter 400 and the pole 300 and prevent welding slag from falling off; and a second adhesive protector 520 is adhesively disposed in the adapter 420, as shown in fig. 2 to 4.

The cell 700 is assembled with the end cap assembly 600, specifically, the second connection tab 722 is welded to the adaptor 400, and the battery is in an unfolded state, as shown in fig. 2.

The first protective film 810 is adhered to the battery, specifically, the first diaphragm portion 811 is adhered to the first end surface 711 and to the side of the first connecting piece 721 facing away from the core body 710 to provide insulation protection against short circuit contact; and adhering the second diaphragm portion 812 to the side of the second connecting piece 722 facing away from the adapter 400 to prevent welding slag at the welding position of the second connecting piece 722 and the adapter 400 from falling off. As shown in particular in fig. 4.

A second protective film 820 is attached to the battery, specifically, a third diaphragm portion 821 is attached to the side of the first diaphragm portion 811 facing away from the core 710, to provide better insulation protection against short-circuit contact. And the fourth diaphragm portion 822 is adhered to the side, away from the adaptor 400, of the second diaphragm portion 812, so that the third diaphragm portion 821 is matched to achieve a supporting effect on the first protection film 810, the first protection film 810 is better attached to the battery, a covering effect on the adaptor 400 is achieved, short-circuit contact is prevented, and welding slag at the welding position of the adaptor 400 and the second connecting sheet 722 is better prevented from falling off. Meanwhile, the fourth diaphragm portion 822 may be adhered to the first and second adhesive protectors 510 and 520, so that the second protective film 820 is better attached to the battery. As shown in detail in fig. 5.

The battery cell 700 is turned over to make the battery assume the folded state shown in fig. 6, and finally the battery cell 700 is installed in the casing, and the end cap assembly 600 is used to cap the opening position of the casing, so as to complete the assembly of the battery.

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

In a fourth aspect, the present application further discloses an electric device, including a battery assembly. 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 (16)

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

an end cap;

the insulating piece is superposed on one side of the end cover facing to the inner cavity of the battery;

the pole column sequentially penetrates through the end cover and the insulating part;

the adapter is positioned on one side, away from the end cover, of the insulating part, a first groove is formed in one side, away from the end cover, of the adapter, a welding area is arranged at the bottom of the first groove, the welding area corresponds to the pole, and the adapter is connected to the pole in a welding mode through the welding area;

and at least part of the first bonding protection piece is bonded and arranged in the first groove so as to be in sealing fit with the welding area.

2. The end cap assembly of claim 1, wherein the first adhesive protection member is a resin glue.

3. An end cap assembly according to claim 2, further comprising a double-sided adhesive tape, wherein at least a portion of the first adhesion protector is adhered to the first recess by the double-sided adhesive tape, and/or,

at least part of the resin adhesive is thermally fused to the first groove.

4. An end cap assembly according to claim 1, wherein at least a portion of the first adhesive protector projects out of the first recess.

5. A battery comprising a housing, a cell, and the end cap assembly of any of claims 1-4,

the shell is provided with an inner cavity, the battery cell is arranged in the inner cavity, and the end cover assembly covers the opening of the shell;

the battery cell comprises a core body and tabs, and the tabs are respectively connected with the core body and the adaptor.

6. The battery of claim 5, wherein the core has a first end surface facing the adapter, the tab includes a first connecting tab connecting the first end surface,

the battery further includes a first protective film including a first diaphragm portion,

at least part of the first membrane part is pasted on one side of the first connecting piece, which is far away from the core body, so as to be stopped between the adapter piece and the first connecting piece,

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

at least part of the first membrane part is pasted on the first end face so as to stop between the adapter piece and the first end face.

7. The battery according to claim 6, further comprising a second protective film,

the second protection film includes third diaphragm portion, third diaphragm portion paste apply in first diaphragm portion deviates from one side of first connection piece, and/or, third diaphragm portion paste apply in first diaphragm portion deviates from one side of first terminal surface.

8. The battery of claim 7, wherein the second protective film includes a fourth diaphragm portion, the fourth diaphragm portion being connected to the third diaphragm portion,

at least part of the fourth diaphragm portion is attached to the side of the insulating member facing away from the end cover, and/or at least part of the fourth diaphragm portion is attached to the side of the adaptor facing away from the insulating member.

9. The battery of claim 8, wherein the fourth diaphragm portion covers the first adhesive protector,

the fourth diaphragm portion is bonded to the first adhesive protector with at least a portion of the first adhesive protector protruding out of the first groove.

10. The battery of claim 8, wherein the cell comprises a first cell and a second cell adjacent to each other, and a first end surface of the first cell and a first end surface of the second cell are both disposed opposite to the end cap assembly;

at least a portion of the second protective film is positioned between the end cap assembly and the first cell, and between the end cap assembly and the second cell,

the number of the third diaphragm parts is two, and the third diaphragm parts are respectively connected with the two back sides of the fourth diaphragm part,

one of the two third membrane portions is attached to the first membrane portion disposed on the first battery cell, and the other is attached to the first membrane portion disposed on the second battery cell.

11. The battery of claim 8, wherein the first protective film further comprises a second diaphragm portion coupled to the first diaphragm portion,

the pole ear comprises a second connecting sheet which is connected with the first connecting sheet and is connected with the adapter in a welding way,

at least part of the second diaphragm portion is attached to the side of the second connecting piece, which is far away from the adapter, and at least part of the second diaphragm portion is attached to the side of the insulating piece, which is far away from the end cover,

at least part of the fourth membrane part is applied to one side, away from the lug, of the second membrane part.

12. The battery according to claim 8, wherein the adapter is provided with an adapter port, a second adhesive protection member is provided in the adapter port,

the fourth diaphragm portion covers the second adhesive protection piece, and the second adhesive protection piece is adhered to the fourth diaphragm portion under the condition that at least part of the second adhesive protection piece protrudes out of the adapter.

13. The battery according to claim 7, wherein the hardness of the second protective film is greater than the hardness of the first protective film.

14. The cell of claim 7, wherein the end cap assembly is provided with a total of two adapters, a first adapter and a second adapter, respectively;

the number of the second protective films is two, one of the two second protective films is attached to the first adaptor, and the other one of the two second protective films is attached to the second adaptor;

the insulating part is equipped with the pressure release hole, the pressure release hole is located first adaptor with between the second adaptor, and be located two between the second protection film.

15. A battery pack comprising the battery according to any one of claims 5 to 14.

16. An electrical device comprising the battery assembly of claim 15.

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