CN218123683U

CN218123683U - Battery end cover assembly, battery pack and electric equipment

Info

Publication number: CN218123683U
Application number: CN202222293817.5U
Authority: CN
Inventors: 胡岳霖
Original assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Current assignee: Xiamen Hithium Energy Storage Technology Co Ltd
Priority date: 2022-08-29
Filing date: 2022-08-29
Publication date: 2022-12-23
Anticipated expiration: 2032-08-29

Abstract

The application discloses battery end cover subassembly, battery package and consumer relates to battery packaging technical field. The battery end cap assembly includes a cap plate, a sealing plug, and a sealing nail. The apron has notes liquid hole, heavy platform hole and inner wall, and heavy platform hole intercommunication sets up in the one side that is close to the battery outside of annotating the liquid hole, and the heavy platform hole has the bottom surface, and the inner wall is located the one side that is close to the battery inside of apron. The sealing plug comprises a cylindrical part, an upper convex part and a lower convex part, wherein the upper convex part extends outwards along the circumferential direction at the upper part of the cylindrical part, the lower convex part extends outwards along the circumferential direction at the lower part of the cylindrical part, the sealing plug is provided with a central hole, and the sealing plug has elasticity. The sealed nail includes the nail body and the nail lid that the cross section is greater than the nail body, and the nail lid sets up the one end at the nail body. The cylindrical part is in sealing fit with the liquid injection hole, the bottom surface of the upper convex part is abutted with the bottom surface of the counter sink hole, and the top surface of the lower convex part is abutted with the inner wall of the cover plate; the nail body is in sealing fit with the central hole of the sealing plug, and the nail cover is arranged in the counter bore. Through the design, the sealing and convenient disassembly of the liquid injection hole of the battery cover plate can be realized, secondary liquid injection can be performed on the battery, and the service life of the battery is prolonged.

Description

Battery end cover assembly, battery pack and electric equipment

Technical Field

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

Background

The required electrolyte of battery is usually through the notes liquid mouth of seting up on the battery end cover and pours into, annotates the liquid and need set up sealedly on annotating the liquid mouth after accomplishing, adopts the sealing member to seal the back usually, utilizes laser welding will annotate the liquid mouth and seals up, can not take place the weeping phenomenon in the assurance battery use.

In the actual use process of the battery, along with the increase of the service time, the internal electrolyte can be reduced to the standard level, and the battery can be ensured to continue to work by injecting the electrolyte. In addition, the problem that the liquid injection amount does not reach the standard can occur in the processing process, rework and liquid injection operation are also needed, and the existing process uses a laser welding process to seal the liquid injection port, so that the sealing plug cannot be disassembled and liquid injection cannot be carried out; or the liquid injection can be completed only by damaging the cover plate after the disassembly, which is not beneficial to secondary liquid injection.

SUMMERY OF THE UTILITY MODEL

It is a primary object of the present application to overcome at least one of the above-mentioned drawbacks of the prior art, and to provide a battery end plate and a battery, which can achieve a detachable sealing structure and facilitate secondary liquid injection of the battery.

In order to achieve the purpose, the following technical scheme is adopted in the application:

according to one aspect of the present application, a battery end cap assembly is provided that includes a cover plate, a sealing plug, and a sealing nail. The apron has notes liquid hole, counter sink hole and inner wall, counter sink hole intercommunication set up in the one side that is close to the battery outside of notes liquid hole, the counter sink hole has the bottom surface, the inner wall is located one side that is close to the battery inside of apron. The sealing plug comprises a cylindrical portion, an upper convex portion and a lower convex portion, the upper convex portion extends outwards in the circumferential direction at the upper portion of the cylindrical portion, the lower convex portion extends outwards in the circumferential direction at the lower portion of the cylindrical portion, the sealing plug is provided with a central hole, and the sealing plug is elastic. The sealing nail comprises a nail body and a nail cover with a cross section larger than the nail body, wherein the nail cover is arranged at one end of the nail body. The cylindrical part is in sealing fit with the liquid injection hole, the bottom surface of the upper convex part is abutted with the bottom surface of the counter sink hole, and the top surface of the lower convex part is abutted with the inner wall of the cover plate; the nail body is in sealing fit with the central hole of the sealing plug, and the nail cover is arranged in the counter bore.

The application provides a battery end cover, through the cylinder portion of elasticity sealing plug with annotate liquid hole sealing connection, the nail body of sealed nail and the sealed cooperation in central authorities hole of sealing plug can realize that seal structure sealing performance is good, seal structure can dismantle, is convenient for annotate the liquid to the secondary of battery.

According to one embodiment of the application, the sealing nail further comprises a clamping convex edge, and the clamping convex edge is arranged at the other end, far away from the nail cover, of the nail body.

In this application, set up the solid protruding edge of card at the other end of the nail body of sealed nail, when can realizing the installation, the sealing plug blocks sealed nail, prevents that sealed nail from dropping.

According to one embodiment of the present application, the central hole is a through hole, and the fastening flange is fastened to the lower protrusion of the sealing plug.

In this application, the sealing plug that the setting has central through-hole can make the processing of sealing plug simple and convenient to can make the card fix protruding along passing central through-hole after the card locate the lower convex part of sealing plug. And the sealing is fixed and disassembled.

According to one embodiment of the present application, the central hole is a blind hole, the bottom of the central hole is provided with a groove along the circumferential direction, and the clamping convex edge is clamped in the groove of the central hole.

In this application, set up the central hole and be the blind hole, can make sealed nail need not pass the sealing plug, just can realize that the solid protruding card of card establishes in the recess, can enough prevent that sealed nail from dropping, can prevent again that sealed nail and sealing plug cooperation are not good and the weeping.

According to one embodiment of the application, the clamping and fixing convex edge is provided with a guide inclined surface.

In this application, the setting of direction inclined plane can make during the installation sealing nail pass the central hole of sealing plug and sealing plug cooperation assembly comparatively easily.

According to one of the embodiments of the application, the top of nail lid is provided with the portion of extracting, the periphery of the portion of extracting is provided with the recess of extracting.

In this application, the setting of portion of pulling out can make things convenient for pulling out of nail lid, realizes that seal structure dismantles portably easy and simple to handle. The pulling grooves on the periphery of the pulling part can facilitate clamping or sucking of the pulling part by an external pulling tool, and the like.

According to one embodiment of the present application, the shape of the extraction groove is a ring shape or a polygon shape.

In this application, the shape of pulling out the recess is annular or polygon, is favorable to strengthening the fastness of establishing or absorbing the clamp of outside pulling out instrument to the portion of pulling out.

According to one embodiment of the application, the spike cover forms an annular groove with the bottom surface of the counter sink hole, which annular groove receives and compresses the upper protrusion of the sealing plug.

In this application, form the ring channel between the heavy platform hole of sealed nail and apron, can hold the last convex part of sealing plug to compress the last convex part of sealing plug, can realize strengthening sealed effect.

According to one embodiment of the application, the annular groove compresses the upper protrusion by 20-40% of the thickness of the upper protrusion.

In the application, the compression amount is selected to enable enough pressure to exist between the sealing nail and the sealing plug, and the sealing performance of the sealing is guaranteed.

According to one embodiment of the application, the top end of the nail cover is provided with a cross groove, a straight groove, a round groove or a polygonal groove.

In this application, the setting in cross recess, straight line groove, circular slot or multilateral groove can make things convenient for anchor clamps to snatch the rotation in order to realize dismantling sealed nail.

According to one embodiment of the application, the cylindrical part is in interference fit with the liquid injection hole, and the interference between the cylindrical part and the liquid injection hole is 0.15-0.25mm.

In the application, the cylindrical part and the liquid injection hole are in interference fit, the interference magnitude is 0.15-0.25mm, the sealing between the cylindrical part of the sealing plug and the liquid injection hole can be realized, and the electrolyte is prevented from leaking; and the sealing is not too tight and is difficult to disassemble.

According to one embodiment of the application, the nail body is in interference fit with the central hole, and the interference is 0.15-0.25mm.

In the application, the nail body of the sealing nail is in interference fit with the central hole of the sealing plug, the interference magnitude is 0.15-0.25mm, secondary sealing can be achieved, the sealing performance can be improved, and electrolyte leakage is prevented.

According to another aspect of the present application, there is provided a battery comprising a housing, a cell assembly and a battery end cap assembly, the battery end cap assembly comprising the above battery end cap assembly.

The battery that this application provided adopts above battery end cover subassembly, can realize dismantling and secondary seal, has realized simple to operate, sealing performance is good, can be convenient for prevent the battery weeping when annotating the secondary of battery.

According to another aspect of the present application, a battery pack is provided, which includes a battery pack, wherein the battery of the battery pack employs the above battery.

According to another aspect of the present application, a battery pack in an electric device is provided, wherein the battery pack is the battery pack.

According to the technical scheme, the battery end cover assembly has the advantages and positive effects that:

the application provides a battery end cover subassembly, including apron, sealing plug and sealing nail. The apron has notes liquid hole, counter sink hole and inner wall, annotates the liquid hole and is used for annotating the battery and pours into electrolyte into, and the intercommunication sets up in the one side that is close to the battery outside of annotating the liquid hole, and the counter sink hole has the bottom surface, and the inner wall is located the one side that is close to the battery inside of apron. The arrangement of the counter sink hole provides a certain installation space for the sealing plug and the sealing nail. The sealing plug comprises a cylindrical part, an upper convex part and a lower convex part; the upper convex portion extends outward in the circumferential direction at an upper portion of the cylindrical portion, and the lower convex portion extends outward in the circumferential direction at a lower portion of the cylindrical portion. The upper convex part is used for being clamped on the bottom surface of the counter sink hole of the cover plate, and the lower convex part is used for being clamped on the inner surface of the cover plate. The sealing plug has a central bore for mounting a sealing pin. The sealing plug is resilient and can be resiliently deformed during installation. The sealing nail comprises a nail body and a nail cover with a cross section larger than the nail body, wherein the nail cover is arranged at one end of the nail body. When the sealing plug is installed, the nail body is arranged in the central hole of the sealing plug in a sealing mode. The cylinder portion is in sealing fit with the liquid injection hole, and leakage of electrolyte can be avoided. The bottom surface of the upper convex part is abutted with the bottom surface of the counter sink hole, and the top surface of the lower convex part is abutted with the inner wall of the cover plate; the nail body is in sealing fit with the central hole of the sealing plug, and the nail cover is arranged in the counter bore. The design of sealed nail and elastic sealing plug can realize sealed dismantling, is convenient for carry out the secondary to the battery and annotates the liquid.

The battery that this application provided, including casing, electric core subassembly and battery end cover subassembly, the battery end cover subassembly includes foretell battery end cover subassembly, easy and simple to handle when the secondary annotates liquid to can not destroy seal structure, annotate sealed respond well after the liquid.

Drawings

Various objects, features and advantages of the present application will become more apparent from the following detailed description of preferred embodiments thereof, when considered in conjunction with the accompanying drawings. The drawings are merely exemplary of the application and are not necessarily drawn to scale. In the drawings, like reference characters designate the same or similar parts throughout the different views. Wherein:

fig. 1 is an exploded perspective view of the cell end cap assembly of the present application.

Fig. 2 is a front view of fig. 1.

Fig. 3 is a front view of the assembled battery end cap assembly according to the present application.

Fig. 4 isbase:Sub>A sectional viewbase:Sub>A-base:Sub>A of fig. 3.

Fig. 5 is a schematic cross-sectional view of a cover plate of the cell end cap assembly of the present application.

Fig. 6 is a perspective view of a sealing plug of the cell end cap assembly of the present application.

Fig. 7 is a front view of the sealing plug of fig. 6.

Fig. 8 is a left side view of the sealing plug of fig. 6.

Fig. 9 is a sectional view taken along line B-B of fig. 7.

Fig. 10 is a perspective view of a seal nail of the battery end cap assembly of the present application.

Fig. 11 is a front view of the seal spike of fig. 10.

Fig. 12 is a left side view of the seal spike of fig. 10.

Fig. 13 is a cross-sectional view C-C of fig. 11.

Fig. 14 is a schematic cross-sectional structure of another embodiment of the present application.

Fig. 15 is a schematic structural view of the battery of the present application.

The reference numerals are explained below:

10. a battery end cap assembly;

11. a cover plate;

111. a liquid injection hole;

112. sinking a platform hole;

1121. a bottom surface;

1122. a side surface;

12. a sealing plug;

121. a cylindrical portion;

122. an upper convex portion;

123. a lower convex portion;

124. a central bore;

13. sealing the nail;

131. a nail body;

132. nailing a cover;

1321. a pulling part;

1322. an annular groove;

133. clamping and fixing the convex edge;

1331. a guide slope;

20. a housing;

30. an electrical core assembly;

100. a battery.

Detailed Description

Exemplary embodiments that embody the features and advantages of the present application are described in detail below. It is to be understood that the present application is capable of various modifications in various embodiments without departing from the scope of the application, and that the description and drawings are to be taken as illustrative and not restrictive in character.

In the following description of various exemplary embodiments of the present application, reference is made to the accompanying drawings, which form a part hereof, and in which are shown by way of illustration various exemplary structures, systems, and steps in which aspects of the application may be practiced. It is to be understood that other specific arrangements of parts, structures, example devices, systems, and steps may be utilized, and structural and functional modifications may be made without departing from the scope of the present application. When introducing elements/components/etc. described and/or illustrated herein, the terms "first," "second," and "third," etc. are used to indicate that there are one or more of the elements/components/etc. The terms "comprising," "including," and "having" are intended to be inclusive and mean that there may be additional elements/components/etc. other than the listed elements/components/etc.

As shown in fig. 1 to 4, the battery end cap assembly 10 of the present application includes a cap plate 11, a sealing plug 12, and a sealing nail 13.

As shown in FIG. 5, the lid plate 11 has a pour hole 111, a counter sink hole 112 and an inner wall, the counter sink hole 112 is provided on the side of the pour hole 111 near the outside of the battery and communicates with the pour hole 111, the counter sink hole 112 has a bottom surface 1121, and the inner wall of the lid plate is located on the side of the lid plate near the inside of the battery. In the present embodiment, the platform settling hole 112 and the liquid injection hole 111 are coaxial, and in some embodiments, the axes of the platform settling hole 112 and the liquid injection hole 111 may be staggered.

As shown in fig. 6 to 9, the sealing plug 12 includes a cylindrical portion 121, an upper convex portion 122 and a lower convex portion 123, the upper convex portion 122 extending outward in the circumferential direction at an upper portion of the cylindrical portion 121, which is a side of the cylindrical portion near the outside of the battery. The lower protrusion 123 extends outward in the circumferential direction at the lower portion of the cylindrical portion 121, which is the side of the cylindrical portion near the inside of the battery. The sealing plug 12 has a central bore 124 and the sealing plug 12 is resilient.

As shown in fig. 10 to 13, the seal nail 13 includes a nail body 131 and a nail cover 132 having a larger cross section than the nail body 131, the nail cover 132 being provided at one end of the nail body 131.

The column part 121 is in sealing engagement with the pour hole 111, and the bottom surface of the upper projection 122 is in contact with the bottom surface 1121 of the counter sink 112, and the bottom surface of the upper projection 122 is the surface of the upper projection close to the column part. The top surface of the lower protrusion 123 is in contact with the inner wall of the cover plate 11, and the top surface of the lower protrusion 123 is the surface of the lower protrusion close to the cylindrical portion. The spike body 131 sealingly engages the central bore 124 of the sealing plug 12 and the spike cover 132 is disposed in the counter sink bore 111. Through the cylinder portion of elasticity sealing plug with annotate liquid hole sealing connection, the nail body of sealed nail and the sealed cooperation of central authorities hole of sealing plug can realize sealed and sealed dismantling, are convenient for realize annotating the liquid to the secondary of battery.

In this embodiment, the seal nail 13 further includes a fastening flange 133, and the fastening flange 133 is disposed at the other end of the nail body 131 far from the nail cover 132. The other end of the nail body of the sealing nail is provided with a clamping convex edge, so that the sealing nail is clamped by the sealing plug when the sealing nail is installed, and the sealing nail is prevented from falling.

In the present embodiment, the central hole 124 is a through hole, and a sealing plug with a central through hole is provided, so that the processing of the sealing plug can be simple, and the fastening flange 133 is fastened to the lower portion 123 of the sealing plug 12 after passing through the central through hole. And the sealing is fixed and disassembled.

In other embodiments, as shown in FIG. 14, the central bore 124 is a blind bore with a recess in the bottom in the circumferential direction. The central hole is not a through hole, so that the sealing nail does not need to penetrate through the sealing plug and enters the battery cover plate, and liquid leakage caused by poor matching of the sealing nail and the sealing plug can be prevented. At this time, the locking flange 133 is locked in the groove of the central hole 124.

In the above embodiment, the locking ledge 133 is provided with the guiding slope 1331. The arrangement of the guide inclined plane can enable the sealing nail to easily penetrate through the central hole of the sealing plug to be matched and assembled with the sealing plug during installation.

In the above embodiment, the tip of the nail cover 132 is provided with the extraction portion 1321, and the outer periphery of the extraction portion 1321 is provided with the extraction groove. The pulling part can facilitate the pulling of the nail cover, the sealing structure is easy and convenient to disassemble, and the operation is simple. The peripheral extraction groove of the extraction part can facilitate clamping or sucking of an external extraction tool on the extraction part and the like.

In the above-described embodiment, the shape of the extraction groove is annular or polygonal. The shape of the pulling groove is annular or polygonal, which is beneficial to enhancing the clamping or sucking firmness of the pulling part by an external pulling tool.

In the above embodiment, the pin cover 132 forms an annular groove 1322 with the bottom surface 1121 of the counterbore 112, and the annular groove 1322 receives and compresses the upper projection 122 of the sealing plug 12. An annular groove is formed between the sealing nail and the counter sink hole of the cover plate, the upper convex part of the sealing plug can be accommodated, the upper convex part of the sealing plug is compressed, and the sealing effect can be enhanced.

In the above-described embodiment, the annular groove 1322 compresses the upper projection 122 by 20% to 40% of the thickness of the upper projection 122. The compression amount is selected to ensure that enough pressure exists between the sealing nail and the sealing plug, and the sealing performance of the seal is ensured.

In the above-described embodiment, the top end of the nail cover 132 is provided with a cross groove, a straight groove, a circular groove, or a polygonal groove. The arrangement of the cross groove, the straight groove, the circular groove or the polygonal groove can facilitate the clamp to grab and rotate the sealing nail to realize disassembly.

In the above embodiment, the cylindrical portion 121 and the liquid inlet 111 are fitted with interference fit, and the cylindrical portion and the liquid inlet can be sealingly fitted to each other, thereby preventing leakage of the electrolyte solution. The interference between the cylindrical part 121 and the liquid inlet 111 is 0.15-0.25mm. The interference magnitude between the cylindrical part and the liquid injection hole is 0.15-0.25mm, so that liquid leakage is avoided or the sealing is too tight, and the liquid injection hole is difficult to disassemble.

In the above embodiment, the nail body 131 is in interference fit with the central hole 124, and the interference is 0.15-0.25mm. Through the interference fit of the nail body of the sealing nail and the central hole of the sealing plug, the interference magnitude is 0.15-0.25mm, the secondary sealing can be realized, the sealing performance can be improved, and the electrolyte leakage is prevented.

As shown in fig. 15, the present application further provides a battery 100, the battery 100 includes a housing 20, a cell assembly 30 and a battery end cap assembly 10, the housing 20 has an opening for accommodating the cavity and communicating the accommodating cavity with the external space, the cell assembly 30 is located in the accommodating cavity and fixedly connected to the bottom of the housing 20, the battery end cap assembly 10 is fixedly connected to the housing 20 and seals the opening of the housing 20, and the battery end cap assembly 10 is further connected to the cell assembly 30.

As described in the foregoing embodiments, in combination with the above-described cell end cap assembly 10, the sealing structure is detachably fixed on the cap plate, so that the electrolyte can be supplemented to the cell 100 in the following process, and the secondary use of the cell 100 can be realized.

The application also provides a battery pack, wherein, the battery pack comprises battery box and multiunit group battery, and the battery in every group battery adopts foretell battery.

The application also provides electric equipment, wherein, the battery package in the electric equipment adopts foretell battery package. The electric equipment may take various forms, for example, a mobile phone, a portable device, a notebook computer, a battery car, a ship, a spacecraft, an electric toy, an electric power tool, and the like, for example, the spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like, the electric toy includes a stationary or mobile electric toy, for example, a game machine, an electric car toy, an electric ship toy, an electric airplane toy, and the like, and the electric power tool includes a metal cutting electric tool, an abrasive electric tool, an assembly electric tool, and an electric tool for railways, for example, an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an electric impact drill, a concrete vibrator, and an electric planer.

It should be noted herein that the cell end cap assemblies shown in the drawings and described herein are merely illustrative of a few of the many types of cell end cap assemblies that the principles of the present application can be employed. It should be clearly understood that the principles of the present application are in no way limited to any of the details or any of the components of the cell end cap assembly shown in the drawings or described in this specification.

The foregoing is a detailed description of several exemplary embodiments of the cell end cap assembly set forth herein, which is described below as an example of the use of the cell end cap assembly set forth herein.

With reference to fig. 1 to 13, the application provides an embodiment of a battery end cap assembly, which is used in the following steps:

when the sealing plug is installed, the cylindrical part of the sealing plug and the liquid injection hole are installed in an interference fit mode, the interference magnitude is 0.15-0.25mm, and the sealing plug and the cover plate are sealed and fixed. At the moment, the lower convex part of the sealing plug is clamped on the inner wall of the cover plate, and the upper convex part of the sealing plug is clamped on the bottom surface of the counter sink hole at the periphery of the liquid injection hole. The sealing plug is elastic, so that the installation is simple and convenient.

Then, the nail body 131 of the sealing nail 13 is fitted into the central hole 124 of the sealing plug 12, and since the sealing plug 12 has good elasticity, the interference fit mounting of the nail body 131 into the central hole 124 of the sealing plug 12 can be achieved. During installation, the guide slope 1331 of the clamping convex edge 133 at the bottom of the sealing nail 13 plays a role in guiding for assembly, so that the sealing nail 13 can be conveniently inserted into the central hole 124 of the sealing plug 12, and the nail body 131 and the central hole 124 of the sealing plug 12 are in interference fit and mutually extruded to realize sealing. At this time, the locking protrusion 133 protrudes out of the central hole 124 of the sealing plug 12 to hook the lower portion 123 of the sealing plug 12, thereby preventing the sealing nail 13 from falling off to the outside. The annular groove 1322 of the sealing peg 13 receives and presses against the upper projection 122 of the sealing plug 12 by a compression of between 20% and 40% to effect a seal, and the annular groove 1322 of the sealing peg 13 may surround the sealing plug 12 so that the sealing plug 12 is not exposed to air.

During the dismantlement, will extract the tool and set up on the portion 1321 of extracting of the nail lid 132 of sealed nail 13, because sealing plug 12 has elasticity, external force is exerted by extracting the tool to sealed nail 13, and external force transmits for sealing plug 12, thereby sealing plug 12 takes place to warp under the effect of external force, extracts in sealed nail 13 the central authorities hole 124 from sealing plug 12, realizes breaking away from of sealed nail and sealing plug, later takes off the sealing plug again, thereby realizes seal structure's dismantlement.

With reference to fig. 5, fig. 9 to fig. 14, the application proposes another embodiment of the battery end cap assembly, which is used in the following process:

Then, the nail body 131 of the sealing nail 13 is fitted into the central hole 124 of the sealing plug 12, and since the sealing plug 12 has good elasticity, the interference fit mounting of the nail body 131 into the central hole 124 of the sealing plug 12 can be achieved. During installation, the guide slope 1331 of the clamping convex edge 133 at the bottom of the sealing nail 13 plays a role in guiding for assembly, so that the sealing nail 13 can be conveniently inserted into the central hole 124 of the sealing plug 12, and the nail body 131 and the central hole 124 of the sealing plug 12 are in interference fit and mutually extruded to realize sealing. At this time, the locking protrusion 133 is locked in the circumferential groove at the bottom of the central hole of the sealing plug 12, so as to prevent the sealing nail 13 from falling off to the outside. The annular groove 1322 of the sealing pin 13 receives and presses against the upper projection 122 of the sealing plug 12 with a compression of between 20% and 40% to effect a seal, and the annular groove 1322 of the sealing pin 13 may surround the sealing plug 12 so that the sealing plug 12 is not exposed to air.

During the dismantlement, will extract the tool and set up on the portion 1321 of extracting of the nail lid 132 of sealed nail 13, because sealing plug 12 has elasticity, external force is exerted by the tool of extracting to sealed nail 13, and external force transmits for sealing plug 12, thereby sealing plug 12 takes place to warp under the effect of external force, extracts in sealed nail 13 the central authorities hole 124 of sealing plug 12, realizes breaking away from of sealed nail and sealing plug, later takes off the sealing plug again, thereby realizes seal structure's dismantlement.

Through the use of the battery end plate of above-mentioned this application, can obtain the end plate of this application, adopt and to realize that the secondary is sealed and detachable is sealed, sealed respond well and can realize that the secondary of battery annotates the liquid.

In summary, the battery end cap assembly provided by the present application includes a cover plate, a sealing plug and a sealing nail. The apron has notes liquid hole, counter sink hole and inner wall, and it is used for injecting into electrolyte to the battery to annotate the liquid hole, counter sink hole intercommunication set up in annotate the outside one side of battery that is close to of liquid hole, the counter sink hole has the bottom surface, and the inner wall is located the apron be close to the inside one side of battery. The arrangement of the counter sink hole provides a certain installation space for the sealing plug and the sealing nail. The sealing plug comprises a cylindrical part, an upper convex part and a lower convex part; an upper convex portion extends outward in the circumferential direction at an upper portion of the cylindrical portion, and a lower convex portion extends outward in the circumferential direction at a lower portion of the cylindrical portion. The upper convex part is used for being clamped on the bottom surface of the counter sink hole of the cover plate, and the lower convex part is used for being clamped on the inner surface of the cover plate. The sealing plug has a central bore for mounting a sealing pin. The sealing plug is resilient and can be resiliently deformed during installation. The sealed nail includes the nail body and the nail lid that the cross section is greater than the nail body, the nail lid sets up the one end of the nail body. When the sealing plug is installed, the nail body is arranged in the central hole of the sealing plug in a sealing mode. The cylinder portion is in sealing fit with the liquid injection hole, and leakage of electrolyte can be avoided. The bottom surface of the upper convex part is abutted with the bottom surface of the counter sink hole, and the top surface of the lower convex part is abutted with the inner wall of the cover plate; the nail body is in sealing fit with the central hole of the sealing plug, and the nail cover is arranged in the counter bore. The design of sealed nail and elastic sealing plug can realize sealed dismantling, is convenient for carry out the secondary to the battery and annotates the liquid. The sealing structure is simple in structure and good in sealing effect, the process can be simplified, the assembly efficiency is improved, the secondary liquid injection of the battery can be realized, the service life of the battery can be prolonged, and the recycling is facilitated.

The battery that this application provided, including foretell battery end cover subassembly, sealed respond well, seal structure can dismantle, can supply electrolyte, realizes the secondary of battery and uses to easy and simple to handle need not destroy battery end cover subassembly.

Exemplary embodiments of the cell end cap assemblies and cells set forth herein are described and/or illustrated in detail above. The embodiments of the application are not limited to the specific embodiments described herein, but rather, components and/or steps of each embodiment may be utilized independently and separately from other components and/or steps described herein. Each component and/or step of one embodiment can also be used in combination with other components and/or steps of other embodiments. When introducing elements/components/etc. described and/or illustrated herein, the articles "a," "an," and "the" are intended to mean that there are one or more of the elements/components/etc.

The embodiments of the present application are not limited to the specific embodiments described herein, but rather, components of each embodiment may be utilized independently and separately from other components described herein. Each component of one embodiment can also be used in combination with other components of other embodiments. In the description of the embodiments of the present application, it is to be understood that the terms "upper", "lower", "left", "right", "front", "rear", and the like indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or units must have a specific direction, be configured and operated in a specific orientation, and thus, should not be construed as limiting the embodiments of the present application.

In the description herein, the appearances of the phrases "one embodiment," "some embodiments," "other embodiments," or the like, are not necessarily limited to the particular features, structures, materials, or characteristics described in connection with the embodiment or example, but are included in at least one embodiment or example of the application. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

In embodiments, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance; the term "plurality" means two or more unless expressly limited otherwise. The terms "mounted," "connected," "fixed," and the like are to be construed broadly, and for example, "connected" may be a fixed connection, a removable connection, or an integral connection; "connected" may be directly connected or indirectly connected through an intermediate. Specific meanings of the above terms in the examples can be understood by those of ordinary skill in the art according to specific situations.

The above description is only a preferred embodiment of the claimed embodiments and is not intended to limit the claimed embodiments, and various modifications and changes may be made to the claimed embodiments by those skilled in the art. Any modification, equivalent replacement, improvement and the like made within the spirit and principle of the applied embodiment shall be included in the protection scope of the applied embodiment.

Claims

1. A battery end cap assembly, comprising: the method comprises the following steps:

the cover plate is provided with a liquid injection hole, a counter sink hole and an inner wall, the counter sink hole is communicated with one side, close to the outside of the battery, of the liquid injection hole, the counter sink hole is provided with a bottom surface, and the inner wall is located on one side, close to the inside of the battery, of the cover plate;

a sealing plug including a cylindrical portion, an upper protrusion extending outward in a circumferential direction at an upper portion of the cylindrical portion, and a lower protrusion extending outward in a circumferential direction at a lower portion of the cylindrical portion, the sealing plug having a central hole, the sealing plug having elasticity;

the sealing nail comprises a nail body and a nail cover with the cross section larger than that of the nail body, and the nail cover is arranged at one end of the nail body;

the cylindrical part is in sealing fit with the liquid injection hole, the bottom surface of the upper convex part is abutted with the bottom surface of the counter sink hole, and the top surface of the lower convex part is abutted with the inner wall of the cover plate; the nail body is in sealing fit with the central hole of the sealing plug, and the nail cover is arranged in the counter bore.

2. The battery end cap assembly of claim 1, wherein: the sealing nail further comprises a clamping and fixing convex edge, and the clamping and fixing convex edge is arranged at the other end, far away from the nail cover, of the nail body.

3. The battery end cap assembly of claim 2, wherein: the central hole is a through hole, and the clamping convex edge is clamped on the lower convex part of the sealing plug.

4. The battery end cap assembly of claim 2, wherein: the central hole is a blind hole, and a groove is formed in the bottom of the central hole along the circumferential direction; the clamping convex edge is clamped in the groove of the central hole.

5. The battery end cap assembly of claim 2, wherein: the clamping convex edge is provided with a guide inclined plane.

6. The battery end cap assembly of any one of claims 1-5, wherein: the top of nail lid is provided with the portion of choosing, the periphery of the portion of choosing is provided with the recess of choosing.

7. The battery end cap assembly of claim 6, wherein: the shape of the drawing groove is annular or polygonal.

8. The battery end cap assembly of any one of claims 1-5, wherein: the pin cover and the bottom surface of the counter sink hole form an annular groove which receives and compresses the upper convex part of the sealing plug.

9. The battery end cap assembly of claim 8, wherein: the compression amount of the annular groove for compressing the upper convex part is 20-40% of the thickness of the upper convex part.

10. The battery end cap assembly of any one of claims 1-5, wherein: the top end part of the nail cover is provided with a cross groove, a straight groove, a circular groove or a polygonal groove.

11. The battery end cap assembly of any one of claims 1-5, wherein: the cylindrical part is in interference fit with the liquid injection hole, and the interference magnitude of the cylindrical part and the liquid injection hole is 0.15-0.25mm.

12. The battery end cap assembly of any one of claims 1-5, wherein: the nail body is in interference fit with the central hole, and the interference magnitude is 0.15-0.25mm.

13. A battery, includes casing, electric core subassembly and battery end cover subassembly, its characterized in that: the cell end cap assembly comprising the cell end cap assembly of any one of claims 1-12.

14. The utility model provides a battery package, includes battery box and group battery, its characterized in that: the battery pack includes the battery of claim 13.

15. An electrical device, characterized in that: comprising the battery pack according to claim 14.