CN219457807U

CN219457807U - Cap assembly for cylindrical battery, battery shell, cylindrical battery and battery pack

Info

Publication number: CN219457807U
Application number: CN202222863952.9U
Authority: CN
Inventors: 席彪; 雷政军; 刘毅
Original assignee: Shaanxi Olympus Power Energy Co Ltd
Current assignee: Shaanxi Olympus Power Energy Co Ltd
Priority date: 2022-10-29
Filing date: 2022-10-29
Publication date: 2023-08-01
Anticipated expiration: 2032-10-29

Abstract

The utility model discloses a cap assembly for a cylindrical battery, a battery shell, the cylindrical battery and a battery pack, which comprises a pole, a mounting piece, an electric connecting piece and a sealing piece, wherein the mounting piece is fixedly arranged on the pole and is used for externally connecting an electrolyte storage tank; the electric connection piece is fixedly arranged below the pole post and is used for being electrically connected with an electrode assembly of the cylindrical battery. The utility model greatly simplifies the cap structure of the traditional cylindrical battery, removes the traditional converging disk and the explosion venting mechanism, and arranges the liquid injection channel on the polar column, thereby not only timely supplementing the electrolyte when the electrolyte of the cylindrical battery is exhausted, but also utilizing the liquid injection channel as the explosion venting channel, and has simple structure, strong practicability and good use effect.

Description

Cap assembly for cylindrical battery, battery shell, cylindrical battery and battery pack

Technical Field

The utility model relates to the technical field of batteries, in particular to a cap assembly for a cylindrical battery, a battery shell, the cylindrical battery and a battery pack.

Background

The cylindrical battery has high capacity, long cycle life and wide use environment temperature. The product is applied to solar lamp, lawn lamp, backup energy, electric tool, toy model, photovoltaic energy, traditional cylinder block is as positive pole, and the casing is as negative pole, but battery block structure is complicated generally, lets out and explodes the mechanism setting and is in the cap in most, and when the electrolyte in the cylinder battery takes place the loss then can not be replenished or change electrolyte.

CN210110852U discloses a circular lithium battery end cover with an overcurrent protection device, which comprises an end cover plate, a plastic upper baffle ring, a pole, a thermistor, a concave adapter piece and a plastic compression ring, wherein the pole is in a convex table shape and comprises a protruding part and a base, the protruding part penetrates through the end cover plate, and the plastic upper baffle ring with the inner side matched with the protruding part is arranged on the outer side of the protruding part of the pole; the concave adapter piece is arranged at the bottom end of the pole; the thermistor is annular and is arranged between the pole column and the concave switching piece; equidistant through holes are formed in the edges of the connection parts of the pole, the thermistor and the concave adapter piece; the plastic pressure ring is arranged at the edge of the joint part of the pole, the thermistor and the concave adapter piece and penetrates through the through hole. The technical scheme is complex in cover plate structure, but cannot solve the problem of electrolyte loss.

Disclosure of Invention

In order to solve the problems that the cylindrical battery is complex in structure and electrolyte loss cannot be solved, the utility model adopts a technical scheme that the cap assembly for the cylindrical battery is provided and consists of a pole, a mounting piece, an electric connecting piece and a sealing piece, wherein the mounting piece is fixedly arranged at the upper end of the pole and is used for externally connecting an electrolyte storage tank, the mounting piece and the pole are provided with a liquid injection channel, and the sealing piece is arranged in the liquid injection channel so as to seal the liquid injection channel; the electric connection piece is fixedly arranged at the lower end of the pole column and is used for being electrically connected with the electrode assembly in the cylindrical battery.

Preferably, the pole is a sheet structure with a protrusion at the center, and the protrusion is provided with an opening for installing the mounting member.

Preferably, the electric connecting piece is an electric connecting piece, one end of the electric connecting piece is connected to the pole, and the other end of the electric connecting piece is connected to the electrode assembly.

Preferably, the mounting member is provided with external threads.

Preferably, one end of the mounting member is further provided with an axially protruding fixing portion, and the fixing portion is sleeved in the opening, is fixed with the pole and is electrically connected with the pole.

Preferably, the other end of the mounting piece is provided with a fixing groove of the sealing piece, and the sealing piece is mounted in the fixing groove.

In order to solve the problems, the utility model adopts the technical scheme that the battery shell comprises the cap assembly, the insulating mounting sleeve and the battery cylinder body, wherein the insulating mounting sleeve is used for coating and clamping the polar column along the edge of the polar column, a mounting position is arranged in the battery cylinder body, and the insulating mounting sleeve is clamped on the mounting position.

In order to solve the problems, the utility model adopts a technical scheme that a cylindrical battery is provided, and the cylindrical battery comprises the battery shell.

In order to solve the above problems, the present utility model provides a battery pack, which includes a conductive electrolyte tank and a plurality of cylindrical batteries fixed on the electrolyte tank.

Preferably, the electrolyte tank is the positive electrode of the battery pack, and the battery pack is further provided with a conductive connecting sheet connected with the negative electrodes of the cylindrical batteries to serve as the negative electrodes of the battery pack; the electrolyte liquid storage cabin is provided with a plurality of liquid injection nozzles, the mounting piece is correspondingly and in through connection with the liquid injection nozzles, and the sealing piece is dissolved in the electrolyte or forms a break under the action of external force, so that the electrolyte in the electrolyte liquid storage cabin is injected into the cylindrical battery through the liquid injection nozzles and the liquid injection channels.

The utility model has the beneficial effects that: the utility model greatly simplifies the cap structure of the traditional cylindrical battery, omits the necessary structures such as the traditional converging disk, the explosion venting mechanism and the like, and is provided with the liquid injection channel on the pole, so that the electrolyte can be timely supplemented when the electrolyte of the cylindrical battery is exhausted, the liquid injection channel can be used as the explosion venting channel, the structure is simple, the practicability is high, the using effect is good, and the omission of the elements of the cap assembly of the traditional cylindrical battery is realized.

Additional advantages, objects, and features of the utility model will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the utility model.

Drawings

In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic cross-sectional view of a cap assembly according to one embodiment;

FIG. 2 is a schematic view of a pole in one embodiment;

FIG. 3 is a schematic view of the structure of a mounting member in one embodiment;

FIG. 4 is a schematic view of the structure of a cap assembly in one embodiment;

fig. 5 is a schematic view of the structure of a battery case in one embodiment;

fig. 6 is a schematic view of a structure of a battery pack in one embodiment.

Reference numerals:

1-cap assembly 11-pole 12-mount 13-sealing piece 14-electrical connection 111-protrusion

112-opening 121-fixing portion 131-fixing groove

2-insulating installation sleeve

3-Battery can 31-mounting position

4-electrolyte reservoir 41-filling nozzle

5-conductive connecting piece

6-cylindrical battery

Detailed Description

Although embodiments of the utility model have been disclosed above, they are not limited to the use listed in the specification and embodiments. It can be applied to various fields suitable for the present utility model. Additional modifications will readily occur to those skilled in the art. Therefore, the utility model is not to be limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.

In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.

Hereinafter, the cap assembly for a cylindrical battery, the battery case, the cylindrical battery, and the battery pack of the present application are specifically disclosed with reference to the accompanying drawings as appropriate. However, unnecessary detailed description may be omitted. For example, detailed descriptions of well-known matters and repeated descriptions of the actual same structure may be omitted. This is to avoid that the following description becomes unnecessarily lengthy, facilitating the understanding of those skilled in the art. Furthermore, the drawings and the following description are provided for a full understanding of the present application by those skilled in the art, and are not intended to limit the subject matter recited in the claims.

All embodiments and alternative embodiments of the present application may be combined with each other to form new solutions, unless specifically stated otherwise. All technical features and optional technical features of the present application may be combined with each other to form new technical solutions, unless specified otherwise.

Reference herein to "comprising" and "including" means open ended, as well as closed ended, unless otherwise noted. For example, "comprising" and "including" may mean that other components not listed may also be included or included, or that only listed components may be included or included.

It is further understood that the terms "first," "second," and the like, are merely used to distinguish one entity or action from another entity or action and do not necessarily require or imply any actual relationship or order between such entities or actions.

The above summary of the present application is not intended to describe each disclosed embodiment or every implementation of the present application. The following description more particularly exemplifies illustrative embodiments. Guidance is provided throughout this application by a series of embodiments, which may be used in various combinations. In the various examples, the list is merely a representative group and should not be construed as exhaustive.

Example 1

As shown in fig. 1 to 4, fig. 1 is a schematic structural view of a cap assembly for a cylindrical battery. The cap assembly 1 comprises a pole 11, a mounting piece 12, a sealing piece 13 and an electric connecting piece 14, wherein the mounting piece 12 is fixedly arranged on the pole 11 and is used for externally connecting an electrolyte tank, the mounting piece 12 and the pole 11 are provided with a liquid injection channel, and the sealing piece 13 is arranged in the liquid injection channel so as to seal the liquid injection channel; the electrical connection piece 14 is fixedly provided under the electrode post 11 for electrical connection with the electrode assembly of the cylindrical battery.

As shown in fig. 2, in some embodiments, the pole 11 is a sheet-like structure provided with a protrusion 111 at the center, shaped like a straw hat, and an opening 112 is provided at the center of the protrusion 111. The hollow portion of the mounting member 12 and the opening 112 of the post cooperate to form a fill channel.

In some embodiments, the electrical connection 14 is an electrical connection tab that is connected to the pole on one side and to one pole of the electrode assembly on the other side, and the other tab of the electrode assembly is electrically connected to the housing. The electrical connection piece may be a conductive metal piece with elastic deformation capability, or a conductive metal piece capable of being bent.

In some embodiments, as shown in fig. 3, the mounting member 12 is provided with external threads for fixed threaded engagement with an external electrolyte reservoir, and the mounting member 12 is hollow and through-disposed. One end of the mounting member 12 is provided with a fixing groove 131 of the sealing sheet 13 for fixing the sealing sheet 13. The sealing sheet is used for sealing the electrolyte channel. The sealing sheet 13 may be inserted into the fixing groove 131 to be fixed. When electrolyte needs to be injected, the sealing sheet is opened to form a break. The fixing groove 131 is provided at one end of the mounting member 12 to facilitate the later breaking of the sealing sheet. The sealing plate can be arranged into a thin plate which is easy to dissolve in electrolyte, and a protective film is arranged on one surface of the thin plate facing the inside of the battery shell, the protective film is used for preventing the electrolyte in the battery barrel from dissolving the thin plate, and when the electrolyte is injected from the outside of the battery, the sealing plate is dissolved by the electrolyte, and the protective film falls off to form a break. The sealing sheet can also be manufactured by a conventional explosion venting film, and a special breach tool is arranged to enable the sealing sheet to realize breach.

As shown in fig. 4, the other end of the mounting member 12 is further provided with an axially protruding fixing portion 121, and the fixing portion 121 is inserted into the opening 112 to be fixedly connected with the pole. For ease of fixing, the outer circumferential dimension of the fixing portion 121 is comparable to the inner circumferential dimension of the opening 112, or an interference fit. The fixing means of the mounting member 12 and the pole 11 is a rivet, a weld, or preferably a weld.

Example 2

As shown in fig. 5, a battery case includes a cap assembly, an insulating mounting sleeve and a battery case, wherein the insulating mounting sleeve 2 covers and clamps the pole along the edge of the pole 11, and a mounting position 31 is provided in the battery case 3, and the insulating mounting sleeve is clamped on the mounting position. During manufacturing, the battery cylinder 3 is rolled out of the mounting position 31, the cap assembly 1 is fixed through the insulating mounting sleeve 2, the electric connecting piece 14 is fixedly connected with one electrode lug of the electrode assembly of the battery, the other electrode lug of the electrode assembly is electrically connected with the shell, and then the cap assembly is arranged in the mounting position 31 for fixing.

In some embodiments, the battery can 3 serves as the battery negative electrode and the cap assembly serves as the battery positive electrode.

In some embodiments, the electrical connection 14 is an electrical connection tab that connects one segment to the pole post and another segment to one pole of the electrode assembly. The electrical connection piece may be a conductive metal piece with elastic deformation capability, or a conductive metal piece capable of being bent.

Example 3

The present embodiment provides a cylindrical battery including the battery case described in embodiment 2, and further including an electrode assembly disposed within the battery case.

Example 4

The embodiment provides a group battery, group battery includes electrolyte reservoir 4 that can electrically conduct, a plurality of cylindrical battery 6, and electrolyte reservoir 4 is provided with a plurality of notes liquid mouth 41, and the cylindrical battery passes through mounting 12 fixed setting on electrolyte reservoir 4, and annotates liquid mouth 41 and the notes liquid mouth on the mounting 12 and correspond to be connected to make the electrolyte in the electrolyte reservoir pour into in the cylindrical battery through annotating liquid mouth 41 and annotating the liquid mouth. In this embodiment, the electrolyte reservoir 4 is a positive electrode of a battery pack, and the battery pack is further provided with a conductive connecting sheet 5 connected to the negative electrodes of the plurality of cylindrical batteries 6 to serve as the negative electrode of the battery pack.

As shown in fig. 5, a battery housing according to this embodiment includes a cap assembly, an insulating mounting sleeve and a battery barrel, wherein the insulating mounting sleeve 2 covers and clamps the pole along the edge of the pole 11, a mounting position 31 is provided in the battery barrel 3, and the insulating mounting sleeve is clamped on the mounting position. During manufacturing, the battery cylinder 3 is rolled out of the mounting position 31, after the cap assembly 1 is fixed through the insulating mounting sleeve 2, the electric connecting piece 14 is electrically connected with one electrode lug of the electrode assembly of the cylindrical battery, the other electrode lug is electrically connected with the shell, and then the cap assembly is placed in the mounting position 31 for fixing.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. The cap assembly for the cylindrical battery is characterized by comprising a pole, a mounting piece, an electric connecting piece and a sealing piece, wherein the mounting piece is fixedly arranged at the upper end of the pole and is used for externally connecting an electrolyte tank, the mounting piece and the pole are provided with a liquid injection channel, and the sealing piece is arranged in the liquid injection channel so as to seal the liquid injection channel; the electric connecting piece is fixedly arranged at the lower end of the pole column and is used for being electrically connected with the electrode assembly in the cylindrical battery.

2. The cap assembly of claim 1, wherein the post is centrally provided with a raised tab-like structure, the raised being provided with an opening for mounting the mount.

3. The cap assembly of claim 2, wherein the electrical connector is an electrical connector tab having one end connected to the post and the other end connected to an electrode assembly within the cylindrical battery.

4. The cap assembly of claim 1, wherein the mounting member is provided with external threads.

5. The cap assembly of claim 2, wherein one end of the mounting member is provided with an axially protruding securing portion that is inserted into the opening to secure and electrically connect the mounting member to the pole.

6. The cap assembly of claim 5, wherein the other end of the mounting member is provided with a fixing groove for mounting the sealing plate, the sealing plate being mounted in the fixing groove.

7. The battery shell is characterized by comprising a battery barrel body, wherein the battery barrel body is provided with an installation position, the battery shell body further comprises the cap assembly as claimed in any one of claims 1-6, and an insulating installation sleeve, wherein the insulating installation sleeve is coated along the edge of the pole and clamped on the installation position after clamping the pole.

8. A cylindrical battery comprising the battery case of claim 7.

9. A battery comprising an electrically conductive electrolyte reservoir and a plurality of the cylindrical cells of claim 8 secured to the electrolyte reservoir.

10. The battery pack according to claim 9, wherein the electrolyte tank is a positive electrode of the battery pack, and the battery pack is further provided with a conductive connecting sheet connected with the negative electrodes of the plurality of cylindrical batteries to serve as the negative electrodes of the battery pack; the electrolyte liquid storage cabin is provided with a plurality of liquid injection nozzles, the mounting piece is correspondingly and in through connection with the liquid injection nozzles, and the sealing piece is dissolved in the electrolyte or forms a break under the action of external force, so that the electrolyte in the electrolyte liquid storage cabin is injected into the cylindrical battery through the liquid injection nozzles and the liquid injection channels.