CN216563466U

CN216563466U - Battery with a battery cell

Info

Publication number: CN216563466U
Application number: CN202123448928.0U
Authority: CN
Inventors: 陈龙云; 曾玉祥; 卫志达; 王永旺; 王智峰; 姜海霞
Original assignee: Zhuhai Cosmx Battery Co Ltd
Current assignee: Zhuhai Cosmx Battery Co Ltd
Priority date: 2021-12-30
Filing date: 2021-12-30
Publication date: 2022-05-17
Anticipated expiration: 2031-12-30
Also published as: WO2023124651A1

Abstract

The present invention provides a battery comprising: shell, closing cap and electric core, the shell has the holding chamber, the electric core is located the holding intracavity, it annotates the liquid hole to have seted up on the shell, annotate the liquid hole with holding chamber intercommunication, closing cap welded seal is in with the closing cap on the shell annotate the liquid hole, the circumferential upper surface of closing cap has first step, first step will the closing cap divide into first lid district and second lid district, the thickness in first lid district is greater than the thickness in second lid district, the thickness in second lid district is less than or equal to the shell with the thickness of second lid district welded seal department. The battery provided by the embodiment of the utility model has good welding sealing performance, and can solve the problems of low yield, high mass production difficulty, and incapability of achieving the expected target in safety and stability of the battery due to poor welding sealing performance.

Description

Battery with a battery cell

Technical Field

The utility model relates to the technical field of battery structures, in particular to a battery.

Background

With the development of economy and the progress of science and technology, intelligent products have been deepened into the aspects of people's life, and in order to improve the user experience to intelligent products, intelligent products are developing to the direction of more and more lightness and miniaturization, and lithium ion button batteries that can be repeatedly charged and used in a circulating manner have been gradually applied to various fields of people' daily life, such as wearable equipment, computer products, medical products and the like.

The limitation of the prior art is overcome, the process of the lithium ion button battery is complex, the manufacturing difficulty is high, the welding sealing performance has great influence on the overall performance of the battery, the poor welding sealing performance can cause low yield and high difficulty in mass production, and the safety and the stability of the battery can hardly reach the expected targets. Therefore, a battery structure scheme with compact structure and good welding sealing performance is needed to achieve the purposes of high yield, high safety and high stability of the battery.

SUMMERY OF THE UTILITY MODEL

The utility model provides a battery, which has good welding sealing performance and can solve the problems that the yield of the battery is low, the mass production difficulty is high, and the safety and the stability cannot reach the expected targets due to poor welding sealing performance.

The battery provided by the embodiment of the utility model comprises: the battery comprises a shell, a sealing cover and a battery cell;

the shell is provided with an accommodating cavity, and the battery cell is positioned in the accommodating cavity;

the shell is provided with a liquid injection hole which is communicated with the accommodating cavity, and the sealing cover is welded and sealed on the shell to seal the liquid injection hole;

the upper surface of the periphery of the sealing cover is provided with a first step, the sealing cover is divided into a first cover area and a second cover area by the first step, and the thickness of the first cover area is larger than that of the second cover area;

the thickness of the second cover area is smaller than or equal to the thickness of the welding and sealing position of the shell and the second cover area.

The embodiment of the utility model provides a battery, wherein a first step is arranged on a sealing cover for sealing a liquid injection hole, the sealing cover is divided into a first cover area and a second cover area by the first step, and the thickness of the second cover area is smaller than or equal to the thickness of a welding and sealing part of a shell and the second cover area. On the one hand, a second cover area is formed by thinning the thickness of the sealing cover of the part through the first step, so that the heat of laser can smoothly reach a welding surface, the welding stability of the sealing cover is facilitated, and the welding sealing yield is improved. On the other hand, the second cover area is used as an upper layer material in the welding process of the sealing cover and the shell, the thickness of the second cover area is set to be smaller than or equal to that of the welding and sealing position of the shell and the second cover area, the risk of electrolyte leakage caused by the welding penetration of the shell can be reduced, and the yield of the processing and assembling process is improved.

In one possible embodiment, the method further comprises: an adapter;

the adapter is welded with the upper surface of the first cover area, and the thickness of the adapter is smaller than or equal to that of the welding position of the first cover area and the adapter.

In one possible embodiment, the housing comprises: a housing and a cover assembly;

the shell and the cover body assembly enclose to form the accommodating cavity;

the cover assembly includes: the cover plate, the top cover and the first insulating part;

the cover plate is hermetically welded with the shell, the cover plate is provided with a through hole, the top cover is provided with a recessed part, the recessed part is positioned in the through hole, the liquid injection hole is formed in the recessed part, and the first insulating piece is arranged between the top cover and the cover plate so as to enable the top cover to be in insulating connection with the cover plate;

a first groove is formed above the depressed part, and the sealing cover is arranged in the first groove.

In a possible embodiment, the lower surface of the peripheral edge of the cover plate is provided with a second step, and the second step is hermetically welded with the shell.

In a possible embodiment, a second groove is formed on the upper surface of the cover plate, and at least a part of the first insulating member is disposed in the second groove.

In a possible embodiment, a third groove is formed in the upper surface of the recessed portion, the pour hole is located in the third groove, the sealing cover covers the third groove, and the diameter of the third groove is larger than or equal to the diameter of the pour hole.

In one possible embodiment, the battery cell includes: the battery cell comprises a battery cell body and a first tab and a second tab which are connected with the battery cell body;

the first pole lug is connected with the top cover, and the second pole lug is connected with the shell.

In one possible embodiment, the method further comprises: a second insulating member;

the second insulating member is disposed on the upper surface and/or the lower surface of the cell body.

In one possible embodiment, the method further comprises: a third insulating member;

the third insulator is disposed between the cap plate and the first tab.

In one possible embodiment, the method further comprises: protective glue;

the protective rubber sleeve is arranged on the part of the first pole lug extending out of the battery cell body and/or the part of the second pole lug extending out of the battery cell body.

Drawings

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

Fig. 1 is an external view of a battery according to an embodiment of the present invention;

fig. 2 is a schematic cross-sectional view of a battery according to an embodiment of the utility model;

FIG. 3 is a schematic cross-sectional view of the battery of FIG. 2;

FIG. 4 is a schematic view of the closure assembly and closure of FIGS. 2 and 3;

fig. 5 is a schematic cross-sectional view of a battery according to an embodiment of the utility model;

FIG. 6 is a schematic cross-sectional view of the battery of FIG. 5;

FIG. 7 is a schematic view of the closure assembly and the closure cap of FIGS. 5 and 6;

fig. 8 is a schematic cross-sectional view of a battery according to an embodiment of the utility model;

FIG. 9 is a schematic cross-sectional view of the battery of FIG. 8;

fig. 10 is a schematic view of the closure assembly and closure of fig. 8 and 9.

Description of reference numerals:

100-a battery;

10-a housing;

11-a housing;

12-a cover assembly;

121-a cover plate;

1211-through hole;

1212 — a second step;

1213-second groove;

122-a top cover;

1221-a recess;

12211-liquid injection holes;

12212-first recess;

12213-third recess;

123-a first insulator;

13-a containing cavity;

20-sealing cover;

21-a first cap region;

22-a second cap region;

23-a first step;

30-electric core;

31-a cell body;

311-a first electrode;

312 — a second electrode;

313-a barrier film;

32-a first tab;

33-a second tab;

40-protective glue;

50-a second insulator;

60-third insulation.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

A battery refers to a device that converts chemical energy into electrical energy in a portion of the space of a cup, tank, or other container or composite container that holds an electrolyte solution and metal electrodes to generate an electrical current. Taking a button cell as an example, the shape and size of the button cell is similar to that of a button, and the button cell is generally large in diameter and thin in thickness and widely applied to electronic devices such as electronic watches, Bluetooth headsets, electric toys and the like.

The battery provided by the embodiment of the utility model can be a button battery, a columnar battery, a special-shaped battery or other types of batteries.

Button cells are widely used in various miniature electronic devices due to their advantages of small size, with diameters ranging from 4.8mm to 30mm and thicknesses ranging from 1mm to 7.7mm, and are generally used as backup power sources for various electronic devices, such as computer motherboards, electronic watches, electronic dictionaries, electronic scales, remote controllers, electric toys, cardiac pacemakers, and the like. The button cell mainly generates electric energy through chemical reaction of a positive electrode material and a negative electrode material in a cell cavity in electrolyte.

The limitation of the prior art is overcome, the button cell is complex in process and high in manufacturing difficulty, the welding sealing performance has great influence on the overall performance of the cell, the poor welding sealing performance can cause low yield and high difficulty in mass production, and the safety and the stability of the cell can hardly reach the expected targets.

In view of this, the battery provided by the embodiment of the present invention is configured such that the sealing cover covering the liquid injection hole is provided with a first step, the first step divides the sealing cover into a first cover area and a second cover area, and the thickness of the second cover area is smaller than or equal to the thickness of the welding seal between the outer casing and the second cover area. On one hand, the second cover area is formed by thinning the thickness of the part of the sealing cover, so that the welding stability of the sealing cover can be facilitated, and the welding sealing yield can be improved; on the other hand, as an upper layer material in the welding of the second cover area and the shell, the thickness of the second cover area is smaller than or equal to that of the shell at the corresponding welding position, so that the risk of leakage caused by the welding penetration of the shell can be reduced, and the yield of the processing and assembling process is improved.

The following detailed description of the battery provided by the embodiment of the utility model is made with reference to the accompanying drawings and the specific embodiment.

Fig. 1 is an external view of a battery 100 according to an embodiment of the present invention, fig. 2 is a schematic cross-sectional structure of the battery 100 according to an embodiment of the present invention, and fig. 3 is another schematic cross-sectional structure of the battery 100 shown in fig. 2.

Referring to fig. 1 to 3, a battery 100 according to an embodiment of the present invention includes: a casing 10, a sealing cover 20 and a battery core 30. The housing 10 has an accommodating cavity 13, and the battery cell 30 is disposed in the accommodating cavity 13.

The casing 10 is provided with a liquid injection hole 12211, the liquid injection hole 12211 is communicated with the accommodating chamber 13, the liquid injection hole 12211 is used for injecting electrolyte, and the battery cell 30 generates a chemical reaction in the electrolyte to generate electric energy. The sealing cap 20 is welded and sealed to the case 10 to cover the pour hole 12211. And the outer diameter of the sealing cap 20 is larger than the inner diameter of the injection hole 12211, so that the sealing cap 20 can be smoothly welded on the outer surface of the case 10.

Specifically, referring to fig. 4, fig. 4 is a schematic view of the cap assembly 12 and the flap 20 of fig. 2 and 3. The upper surface of the periphery of the sealing cover 20 has a first step 23, the first step 23 divides the sealing cover 20 into a first cover area 21 and a second cover area 22, and the thickness of the first cover area 21 is greater than that of the second cover area 22. The flap 20 is inverted "T" shaped when viewed in cross-section through the flap 20. The laser strikes the upper surface of the second cover region 22, and the sealing cover 20 and the outer shell 10 are welded and sealed together through the laser heat. In order to ensure the welding performance, in the embodiment of the present invention, the thickness of the second cover region 22 is set to be less than or equal to the thickness of the case 10 where it is welded and sealed with the second cover region 22.

It should be understood that, on the one hand, the second cap region 22 is formed by thinning the thickness of the sealing cap 20 by the first step 23, so that the heat of the laser can smoothly reach the welding surface, which is beneficial to the welding stability of the sealing cap 20 and improves the yield of welding and sealing. On the other hand, the second cap region 22 is used as an upper layer material in the welding of the sealing cap 20 and the housing 10, and the thickness of the second cap region 22 is set to be less than or equal to the thickness of the welding and sealing part of the housing 10 and the second cap region 22, so that the risk of electrolyte leakage caused by the welding-through of the housing 10 can be reduced, and the yield of the processing and assembling process can be improved.

In some embodiments of the utility model, the thickness of the first cover section 21 may be set within the range of 0.1mm to 1.5mm and the thickness of the second cover section 22 may be set within the range of 0.05mm to 1 mm.

Of course, the present invention is not limited thereto, and in some embodiments of the present invention, in order to connect the battery 100 to a circuit structure inside the electronic device, an adaptor (not shown) is generally further included, and the adaptor is provided with a pin, and the pin is electrically connected to the circuit structure inside the electronic device, so as to transfer the electric energy in the battery 100 to the electronic device. In order to ensure the stability of the adaptor when welding with the sealing cap 20, the adaptor is welded with the upper surface of the first cap area 21 in the sealing cap 20, so that the risk of leakage caused by welding through the sealing cap 20 can be reduced. And the thickness of the adapter is less than or equal to the thickness of the welding part of the first cover area and the adapter, so that the first cover area 21 serving as a lower layer material in the adapter and the sealing cover 20 cannot be welded through, the risk of electrolyte leakage is further reduced, and the yield of the processing and assembling process is improved.

With continued reference to fig. 2-4, in some embodiments of the utility model, the housing 10 includes: the portable electronic device comprises a shell 11 and a cover body assembly 12, wherein the shell 11 and the cover body assembly 12 enclose to form an accommodating cavity 13.

With particular attention paid to fig. 4, the cover assembly 12 includes: the battery pack comprises a cover plate 121, a top cover 122 and a first insulating member 123, wherein the cover plate 121 is hermetically welded with the case 11, a through hole 1211 is formed in the cover plate 121, the top cover 122 has a recess 1221, and the recess 1221 is disposed in the through hole 1211 to reduce the overall height of the battery 100. The pour hole 12211 is opened in the recessed portion 1221. A first insulating member 123 is disposed between the top cover 122 and the cover plate 121 to connect the top cover 122 and the cover plate 121 in an insulating manner. The top cap 122, the first insulator 123 and the cap plate 121 may be hermetically connected by thermal welding.

The top cover 122 is made of metal, generally stainless steel or nickel. The cover plate 121 is a stretched annular sheet. The outer diameter of the top cover 122 is 0.1mm-2mm smaller than the outer diameter of the cover plate 121. The first insulating member 123 may be made of PP glue (Polypropylene sealant) and contains ethyl cyanoacrylate as a main component.

A first groove 12212 is formed above the recess 1221, and the sealing cap 20 is disposed in the first groove 12212, on one hand, the first groove 12212 can limit the sealing cap 20, and on the other hand, the sealing cap 20 is disposed in the first groove 12212, which is beneficial to reducing the overall height of the battery 100.

Here, as shown in fig. 2 and fig. 3, the battery cell 30 includes: the battery cell comprises a battery cell body 31, and a first tab 32 and a second tab 33 connected with the battery cell body 31, wherein the battery cell body 31 reacts in an electrolyte to generate electric energy, the first tab 32 can be a positive tab or a negative tab, and correspondingly, the second tab 33 can be a negative tab or a positive tab. The first tab 32 is electrically connected to the top cover 122 to form a case anode or a case cathode, and correspondingly, the second tab 33 is electrically connected to the case 11 or the cover plate 121 to form a case cathode or a case anode. The protective adhesive 40 is sleeved on the partial sections of the first tab 32 and the second tab 33, and the protective adhesive 40 is sleeved on the part of the first tab 32 protruding out of the cell body 31 and/or the part of the second tab 33 protruding out of the cell body 31 to protect the first tab 32 and the second tab 33.

In the drawings of the present invention, the second insulating member 50 is provided on both the upper surface and the lower surface of the cell body 31, and the second insulating member 50 is provided on both the upper surface and the lower surface of the cell body 31, in the drawings of the present invention, the second insulating member 50 is provided on both the upper surface and the lower surface of the cell body 31 for illustration, and the second insulating member 50 plays a role of insulating the cell body 31 from the periphery, so that the cell body 31 does not form a complete passage with the casing 10.

In addition, the battery 100 provided in the embodiment of the present invention further includes: a third insulator 60, the third insulator 60 being disposed between the cover plate 121 and the first tab 32. illustratively, in some embodiments of the present invention, the third insulator 60 is disposed on the lower surface of the cover plate 121 for insulating the first tab 32. the third insulator 60 is typically a non-metallic insulating material and has a thickness of 0.02mm to 0.1mm, preferably in the range of 0.03mm to 0.05 mm.

The battery cell 30 may be a core-winding battery cell 30, the battery cell body 31 is formed by sequentially stacking a first electrode 311, a second electrode 312, and a separation film 313 and winding from one end to the other end (as shown in fig. 4), in order to ensure the safety performance of the battery 100, the total area of the first electrode 311 is greater than the total area of the second electrode 312, so that the second electrode 312 is covered by the first electrode 311. Of course, the battery cell 30 provided in the embodiment of the present invention is not limited to the above example, and may also be a laminated battery cell.

After the first tab 32 and the second tab 33 are respectively led out from the cell body 31, in some embodiments of the present invention, the relative position between the first tab 32 and the second tab 33 may be set such that an included angle between an orthographic projection of the first tab 32 on the bottom surface of the casing 11 and an orthographic projection of the second tab 33 on the bottom surface of the casing 11 is 90 ° to 180 °, so that it can be ensured that the first tab 32 and the second tab 33 do not affect each other. Of course, in other embodiments of the present invention, an included angle between an orthographic projection of the first tab 32 on the bottom surface of the housing 11 and an orthographic projection of the second tab 33 on the bottom surface of the housing 11 may also be 0 ° to 90 °, as long as the first tab 32 and the second tab 33 are not affected, and the present invention is not limited thereto.

The structure of the casing 10 of the battery 100 according to the embodiment of the present invention is not limited to the above example, and for example, the casing 10 may be formed by butt-joining an upper casing with an opening at one end and a lower casing with an opening at one end, the upper casing and the lower casing enclose the accommodation chamber 13, an insulating layer for insulating the upper casing and the lower casing is interposed between the joining surfaces of the upper casing and the lower casing, so that the upper casing and the lower casing serve as the positive electrode and the negative electrode of the battery 100, respectively, the electrolyte injection hole 12211 is opened in the upper casing, and the sealing cover 20 covers the electrolyte injection hole 12211. Here, the structure of the case 10 of the battery 100 is not limited.

Fig. 5 is a schematic cross-sectional view of a battery 100 according to an embodiment of the present invention, fig. 6 is a schematic cross-sectional view of the battery 100 in fig. 5, and fig. 7 is a schematic structural view of the cap assembly 12 and the sealing cap 20 in fig. 5 and 6.

Referring to fig. 5 to 7, in some embodiments of the present invention, a second step 1212 is formed on a lower surface of a peripheral edge of the cover plate 121 of the cover assembly 12, and the second step 1212 is hermetically welded to the housing 11. Through setting up second step 1212 for electric core 30 and side welding laser dislocation, when apron 121 and casing 11 seal weld, effectively avoid the burn of laser to electric core 30. When the battery cell 30 is a roll core type battery cell, the second step 1212 may press the isolation film 313 into the accommodating cavity 13, so as to avoid the poor welding seal problem caused by the isolation film 313 being clamped in the weld between the cover plate 121 and the housing 11. In some embodiments of the present invention, the width of the second step 1212 (the horizontal direction of the second step 1212) may be set to be between 0.1mm and 1mm, and the depth of the second step 1212 (the vertical direction of the second step 1212) may be set to be between 0.02mm and 0.5 mm.

Fig. 8 is a schematic cross-sectional view of a battery 100 according to an embodiment of the present invention, fig. 9 is a schematic cross-sectional view of the battery 100 in fig. 8, and fig. 10 is a schematic structural view of the cap assembly 12 and the sealing cap 20 in fig. 8 and 9.

Referring to fig. 8 to 10, in some embodiments of the present invention, a second groove 1213 is formed on the upper surface of the cover plate 121 of the cover assembly 12, and at least a portion of the first insulating member 123 is disposed in the second groove 1213. It should be explained here that when the recess 1221 is not easily contacted with the cap plate 121, the first insulator 123 is entirely disposed in the second groove 1213, and when the gap between the recess 1221 and the cap plate 121 is too small, a part of the first insulator 123 is required to be disposed between the recess 1221 and the cap plate 121, and at this time, a part of the first insulator 123 is disposed in the second groove 1213 and a part of the first insulator 123 is disposed between the recess 1221 and the cap plate 121.

It is understood that the second groove 1213 can accommodate the flash generated by the first insulating member 123 during thermal welding, prevent the first insulating member 123 from overflowing, and ensure welding performance between the top cover 122 and the cap plate 121.

Wherein, the outer diameter of the second groove 1213 may be set to be smaller than the outer diameter of the cap plate 121 by 0.1mm to 1mm, so that the area of the first insulating member 123 can be sufficiently large to enhance the overall connectivity between the cap 122 and the cap plate 121. The depth of the second groove 1213 may be set between 0.02mm and 0.5 mm.

It should be noted that when one embodiment includes both the second step 1212 and the second groove 1213, the inner diameter of the second step 1212 may approximately coincide with the outer diameter of the second groove 1213, which may facilitate the integral molding of the cover plate 121.

With continued reference to FIG. 10, in some embodiments of the present invention, a third recess 12213 may be formed on the upper surface of the recess 1221, the pour hole 12211 may be located in the third recess 12213, and the sealing cap 20 may be covered on the third recess 12213. And the aperture of the third recess 12213 is greater than the aperture of the liquid injection hole 12211, and the third recess 12213 can be used for buffering electrolyte, and when the battery 100 is subjected to subsequent welding packaging, the electrolyte is heated to expand and flows into the third recess 12213, so that the problem that the battery 100 bulges or cracks due to expansion of the electrolyte is prevented.

It should be noted that the third recesses 12213 and the injection holes 12211 may have any shape, such as a circle, a square, an irregular pattern, etc. In general, the third recesses 12213 and the liquid injection holes 12211 have a circular or square shape, and in this case, the diameter or side length of the third recesses 12213 may be set to be between 0.5mm and 4mm, and the depth may be set to be between 0.02mm and 0.5 mm. The diameter or the side length of the liquid injection hole 12211 is set to be between 0.2mm and 3 mm.

In summary, the battery 100 provided by the embodiment of the present invention has good welding sealing performance, and can solve the problems of low yield, high difficulty in mass production, and failure in achieving the desired safety and stability due to poor welding sealing performance. Moreover, the battery 100 provided by the embodiment of the utility model has the characteristics of compact structure, strong practicability and the like.

The method of assembling battery 100 in one embodiment is described below.

The second insulating members 50 are attached to the upper and lower surfaces of the battery cell 30 to insulate the battery cell 30 from the peripheral metal members. After the battery cell 30 is placed in the accommodating cavity 13, the second tab 33 is welded to the bottom of the casing 11, and the welding point is located at the center hole of the battery cell 30. And welding the first tab 32 with the lower surface of the top cover 122, wherein the injection hole 12211 is not covered by the first tab 32 after welding. After being assembled, the cover body assembly 12 is coaxially attached to the shell 11, and the circumference of the side edge is welded and sealed. Electrolyte is injected into the accommodating cavity 13 from the liquid injection hole 12211, the third groove 12213 is used for caching the electrolyte, the sealing cover 20 is sealed to the liquid injection hole 12211 after liquid injection, the second cover area 22 is lapped with the top cover 122 for welding and sealing, and the sealing cover 20 is approximately coaxial with the liquid injection hole 12211.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the device or element so referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be considered as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "comprises" and "comprising," and any variations thereof, as used herein, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed, but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

Unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integral to one another; either directly or indirectly through intervening media, may be used in either the internal or the external relationship of the two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations. Furthermore, the terms "first," "second," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate a number of the indicated technical features.

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; while the utility model has been described in detail and with reference to the foregoing embodiments, it will 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; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A battery, comprising: the battery comprises a shell, a sealing cover and a battery cell;

2. The battery of claim 1, further comprising: an adapter;

3. The battery of claim 1 or 2, wherein the housing comprises: a housing and a cover assembly;

the shell and the cover body assembly enclose to form the accommodating cavity;

4. The battery according to claim 3,

and a second step is formed on the lower surface of the periphery of the cover plate, and the second step is welded with the shell in a sealing manner.

5. The battery according to claim 3,

a second groove is formed in the upper surface of the cover plate, and at least part of the first insulating piece is arranged in the second groove.

6. The battery according to claim 3,

a third groove is formed in the upper surface of the sunken part, the liquid injection hole is located in the third groove, and the sealing cover covers the third groove;

the aperture of the third groove is larger than that of the liquid injection hole.

7. The battery of any of claims 4-6, wherein the cell comprises: the battery cell comprises a battery cell body and a first tab and a second tab which are connected with the battery cell body;

8. The battery of claim 7, further comprising: a second insulating member;

9. The battery of claim 7, further comprising: a third insulating member;

the third insulator is disposed between the cap plate and the first tab.

10. The battery of claim 7, further comprising: protective glue;