CN109037501A

CN109037501A - Buckle type lithium-ion battery shell and button laminated lithium ion battery

Info

Publication number: CN109037501A
Application number: CN201810998731.8A
Authority: CN
Inventors: 周晓玲; 刘淼
Original assignee: Shenzhen Can Sharp Creative Technology Ltd
Current assignee: Shenzhen Can Sharp Creative Technology Ltd
Priority date: 2018-08-30
Filing date: 2018-08-30
Publication date: 2018-12-18

Abstract

The present invention relates to field of lithium ion battery, disclose a kind of buckle type lithium-ion battery shell and button laminated lithium ion battery, shell includes: the first pole shell, first end cover is equipped in the one end for the annular that first annular shell pieces is formed, the other end is annular opening, and the internal diameter of first annular shell pieces section is wider than the internal diameter of the second circular casing segment in first annular shell pieces；Second pole shell is equipped with second end cover in the one end for the annular that the second annular shell pieces is formed, and the other end is annular opening；Insulated enclosure circle, second annular shell pieces is placed between first annular insulator, the second annular insulator, the opposite socket of first pole shell, the second pole shell opener forms the cavity of a sealing, first annular shell pieces section is covered on outside the second annular insulator, it is against on the inner wall of the first pole shell by the annular opening for the second annular shell pieces that insulated enclosure circle wraps up, under the first pole shell, the effect of the second pole shell, insulated enclosure circle is in elastic deformation state.Be conducive to improve the capacity of button cell using this programme.

Description

Buckle type lithium-ion battery shell and button laminated lithium ion battery

Technical field

The present invention relates to field of lithium ion battery, are specifically designed a kind of buckle type lithium-ion suitable for large capacity button cell Battery case and button laminated lithium ion battery.

Background technique

As intelligence wearing product is using more and more extensive, lithium ion secondary rechargeable battery of the people for small size Demand it is also increasingly wider, button cell small in size is increasingly used in intelligence and dresses product, such as earphone etc..

The present inventor has found that the capacity for improving button cell is that current needs solve in carrying out research process of the present invention One big project.

Summary of the invention

The first purpose of the embodiment of the present invention is to provide buckle type lithium-ion battery shell and button laminated lithium ion battery, Using the technical solution, be conducive to the capacity for improving fastening lithium ionic cell.

In a first aspect, a kind of fastening lithium ionic cell shell provided in an embodiment of the present invention, comprising:

First pole shell, the first annular shell pieces including tubular are equipped with first end cover in one end of the first annular shell pieces, The other end is annular opening, and the internal diameter of first annular shell pieces section is wider than the interior of the second circular casing segment in the first annular shell pieces Diameter, the first annular shell pieces section is close to the cylindrical-opening of first pole shell, and the second circular casing segment is close to described One end cap；

Second pole shell, the second annular shell pieces including tubular are equipped with second end cover in one end of the described second annular shell pieces, The other end is annular opening；

Insulated enclosure circle, absolutely including first annular insulator, the second annular being looped around outside the first annular insulator Edge body, the first annular insulator, the second annular insulator integrated design；

The sealing snare is placed on the first annular insulation in the second circular casing on piece, the described second annular shell pieces Between body, the second annular insulator,

First pole shell, the second pole shell opener are opposite to be socketed, and the cavity of a sealing is formed,

The first annular shell pieces section is covered on outside second annular insulator, the institute wrapped up by the insulated enclosure circle The annular opening for stating the second annular shell pieces is against transition connection between the first annular shell pieces section and first annular shell pieces section The inner wall of section, under first pole shell, the effect of the second pole shell, the insulated enclosure circle is in elastic deformation state.

Second aspect, a kind of button laminated lithium ion battery provided in an embodiment of the present invention, comprising:

Above-mentioned any fastening lithium ionic cell shell,

Laminated lithium ion battery is encapsulated in first pole shell, the second pole valve jacket connects in the cavity to be formed；

Two electrodes of the laminated lithium ion battery are electrically connected with the first end cover, first end cover respectively.

11, button laminated lithium ion battery according to claim 9, characterized in that the laminated lithium ion battery Include:

Negative electrode tab, surface topography is rounded, and the first radially-inwardly recessed cathode is respectively arranged in the negative electrode tab Notch and the outwardly directed first cathode projecting piece of circular edge for radially outward exceeding the negative electrode tab, described first Two surfaces of cathode projecting piece are exposed collector, and the width of the first cathode notch is wider than the width of the first positive projecting piece Degree,

Positive plate, surface topography is rounded, and described first be radially-inwardly recessed is respectively arranged on the positive plate Positive notch and the positive projecting piece of circular edge outwardly directed first for radially outward exceeding the negative electrode tab, described Two surfaces of the first positive projecting piece are exposed collector substrate,

Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, arbitrary neighborhood two described in A membrane layer has been respectively separated between negative electrode tab, positive plate,

Face is laminated in each first cathode notch, and face is laminated in each first cathode projecting piece,

Face is laminated in each cathode projecting piece and each described first positive notch, and stretches from the described first positive notch Out, and section of stretching out welds together jointly；

Face is laminated in each described first positive notch, and face is laminated in each described first positive projecting piece,

Each first positive projecting piece and each first cathode notch are laminated face, and from the first cathode notch It stretches out, and section of stretching out welds together jointly.

On the laminated body, the outermost layer of first end cover side described in face are as follows: only coat the positive-active material on one side Expect coating layer, the exposed positive plate of another side plus plate current-collecting body, the outermost positive plate it is exposed Anode collection dignity and the first end cover face face contact；

The positive electrode active materials coating layer of the outermost positive plate has negative by membrane layer and the dual coating at interval The negative electrode tab of pole active material coating layer faces；

On the laminated body, the outermost layer of cathode end cover side described in face are as follows: only coat the negative electrode active material on one side Expect coating layer, the exposed negative electrode tab of another side negative current collector, the outermost negative electrode tab it is exposed Negative pole currect collecting dignity and the negative pole end capping to face contact,

The negative electrode active material coating layer of the outermost negative electrode tab has just by the membrane layer and dual coating at interval The positive plate of pole active material coating layer faces.

12, button laminated lithium ion battery according to claim 9, characterized in that the laminated lithium ion battery Include:

The width of each described first positive notch is wider than the width of each first cathode projecting piece,

The width of each first cathode notch is wider than the width of each described first positive projecting piece,

Face is laminated in each cathode projecting piece and each described first positive notch, and stretches from the described first positive notch Out, and section of stretching out welds together jointly, is electrically connected with the cathode end cap of the button cell；

Each first positive projecting piece and each first cathode notch are laminated face, and from the first cathode notch It stretches out, and section of stretching out welds together jointly, is electrically connected with the first end cover of the button cell.

13, button laminated lithium ion battery according to claim 11 or 12, characterized in that

Each positive plate, which is respectively implanted, to be laid in each diaphragm bag, and the diaphragm bag is by upper layer and lower layer diaphragm face structure At, the diaphragm bag in identical as the arc-shaped shape of the negative electrode tab, be also respectively provided on the diaphragm bag it is radial to Interior the first recessed diaphragm notch, the second diaphragm notch, the described first positive projecting piece stretch out from the first diaphragm notch, make Described first positive notch is located at the second diaphragm indentation, there；

Each negative electrode tab, positive plate are layered on top of each other composition laminated body, in the laminated body, arbitrary neighborhood two described in A membrane layer has been respectively separated between negative electrode tab, positive plate, specifically:

Merging has each diaphragm bag of the positive plate to be mutually laminated with the negative electrode tab；

Each first cathode projecting piece is faced with the second diaphragm notch respectively, and from the second diaphragm notch It stretches out.

14, button laminated lithium ion battery according to claim 13, characterized in that

The surrounding of the diaphragm bag is provided with continuous or discontinuous packaging line.

15, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The second radially-inwardly recessed positive notch, third is also respectively provided in the two sides of the described first positive projecting piece Positive notch,

Described second positive notch, third anode notch are located at the two sides of the described first positive projecting piece, form institute State the gap of the arc edge of the first positive projecting piece and the positive plate.

16, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The second radially-inwardly recessed cathode notch, third are also respectively provided in the two sides of the first cathode projecting piece Cathode notch,

The second cathode notch, third cathode notch are located at the two sides of the first cathode projecting piece, form institute State the gap of the arc edge of the first cathode projecting piece and the negative electrode tab.

17, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The first cathode notch, the first cathode projecting piece are located at two side mutually diametrically of the negative electrode tab Edge；

Described first positive notch, the first positive projecting piece are located at two side mutually diametrically of the positive plate Edge.

18, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The outermost layer of the laminated body is equal are as follows: only coats the negative electrode active material coating layer, another side cathode collection on one side The exposed negative electrode tab of fluid,

The cathode end cap faces face contact with the exposed negative current collector is located at.

19, button laminated lithium ion battery according to claim 18, characterized in that

It is separated with an insulating trip between the first end lid and the outermost negative electrode tab of the laminated body,

Each first positive projecting piece of the laminated body welded together passes through the insulating trip and described the One end cover body is welded to connect.

20, button laminated lithium ion battery according to claim 19, characterized in that

The insulating trip is rounded, and an insulation to match with the described first positive projecting piece is provided in the circle Piece notch, the width of the insulating trip notch are greater than the width of described one positive projecting piece,

The each described first positive projecting piece of the laminated body welded together passes through the insulating trip notch and institute State first end cover welded connecting.

21, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The width of each described first positive notch is wider than the width of each first cathode projecting piece.

22, button laminated lithium ion battery according to claim 11 or 12, characterized in that

The width of each first cathode notch is wider than the width of each described first positive projecting piece.

23, button laminated lithium ion battery according to claim 11 or 12, characterized in that

On the laminated body, the outermost layer of first end cover side described in face is metal foil, the top of the metal foil Face and the first end cover connect, and are membrane layer in the bottom surface of the metal foil.

24, button laminated lithium ion battery according to claim 23, characterized in that

Described metal foil are as follows: the plus plate current-collecting body.

25, button laminated lithium ion battery according to claim 11 or 12, characterized in that

On the laminated body, the outermost layer of cathode end cover side described in face is only to coat the negative electrode active material on one side Coating layer, the exposed negative electrode tab of another side negative current collector, the exposed of the outermost negative electrode tab are born Pole afflux dignity and the negative pole end capping are to face contact.

Therefore using the present embodiment technical solution, button is constituted to socket using the first pole shell, the second pole shell phase Formula lithium-ion battery shell, structure is easy for installation, is conducive to improve cavity inner volume as far as possible in the case where size-constrained, from And be conducive to improve the capacity of button cell.

As the present embodiment signal rather than limit, the present embodiment make to be located at first annular shell pieces, the second annular shell pieces it Between the second annular insulator be in by elasticity of compression deformed state, first annular shell pieces, the are made by the second annular insulator Mutually socket connection connects second ring shell pieces without screw securely, keeps button cell shell structure simpler, favorably In the volume for further decreasing shell, housing cavity space is improved.

Detailed description of the invention

The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, not Constitute inappropriate limitation of the present invention.

Fig. 1 is the schematic perspective view for the first pole shell that the embodiment of the present invention 1 provides；

Fig. 2 is the main view perspective structure schematic diagram of Fig. 1；

Fig. 3 is the perspective structure perspective diagram of Fig. 1；

Fig. 4 is the A-A the schematic diagram of the section structure of Fig. 3；

Fig. 5 is the schematic perspective view for the second pole shell that the embodiment of the present invention 1 provides；

Fig. 6 is the main view perspective structure schematic diagram of Fig. 5；

Fig. 7 is the perspective structure perspective diagram of Fig. 5；

Fig. 8 is the A-A the schematic diagram of the section structure of Fig. 7；

Fig. 9 is the schematic perspective view for the insulated enclosure circle that the embodiment of the present invention 1 provides；

Figure 10 is the main view perspective structure schematic diagram of Fig. 9；

Figure 11 is the perspective structure perspective diagram of Fig. 9；

Figure 12 is the A-A the schematic diagram of the section structure of Figure 11；

Figure 13 is the assembling structure schematic diagram for the button cell shell that the embodiment of the present invention 1 provides；

Figure 14 is the main view perspective structure schematic diagram after the assembly of button cell shell shown in Figure 13；

Figure 15 is the perspective structure perspective diagram of Figure 14；

Figure 16 is the A-A the schematic diagram of the section structure of Figure 15；

Figure 17 is that the front view structure for the pole piece suitable for button laminated lithium ion battery that the embodiment of the present invention 2 provides is shown It is intended to；

Figure 18 is the overlooking structure diagram of Figure 17；

Figure 19 is the side structure schematic diagram of Figure 17；

Figure 20 is the schematic perspective view of Figure 17；

Figure 21 is that the merging suitable for button laminated lithium ion battery that the embodiment of the present invention 2,3,4 provides has positive plate The schematic view of the front view of diaphragm bag；

Figure 22 is the overlooking structure diagram of Figure 21；

Figure 23 is the side structure schematic diagram of Figure 21；

Figure 24 is the schematic perspective view of Figure 21；

Figure 25 is the schematic view of the front view for the insulating trip that the embodiment of the present invention 2,3,4 provides；

Figure 26 is the overlooking structure diagram of Figure 25；

Figure 27 is the side structure schematic diagram of Figure 25；

Figure 28 is the schematic perspective view of Figure 25；

Figure 29 is the schematic view of the front view for the button laminated lithium ion battery that the embodiment of the present invention 2 provides；

Figure 30 is the overlooking structure diagram of Figure 29；

Figure 31 is the side structure schematic diagram of Figure 29；

Figure 32 is the partial enlargement structural representation of the component I in Figure 29；

Figure 33 is the schematic perspective view of Figure 29；

Figure 34 is the assembling structure schematic diagram of Figure 29；

Figure 35 is the schematic view of the front view for the button laminated lithium ion battery that the embodiment of the present invention 3 provides；

Figure 36 is the overlooking structure diagram of Figure 35；

Figure 37 is the side structure schematic diagram of Figure 35；

Figure 38 is the partial enlargement structural representation of the component II in Figure 35；

Figure 39 is the partial enlargement structural representation of the component III in Figure 35；

Figure 40 is the schematic perspective view of Figure 35；

Figure 41 is the assembling structure schematic diagram of Figure 35；

Figure 42 is the schematic view of the front view for the button laminated lithium ion battery that the embodiment of the present invention 4 provides；

Figure 43 is the overlooking structure diagram of Figure 42；

Figure 44 is the side structure schematic diagram of Figure 42；

Figure 45 is the partial enlargement structural representation of the component I in Figure 44；

Figure 46 is the partial enlargement structural representation of the component II in Figure 44；

Figure 47 is the schematic perspective view of Figure 42；

Figure 48 is the assembling structure schematic diagram of Figure 42.

Appended drawing reference:

1: the first pole shell；11: first annular shell pieces；12: first end cover；111: first annular shell pieces section；

112: the second circular casing segments；114: bending segment；2: the first pole shells；21: first annular shell pieces；

22: first end cover；3: insulated enclosure circle；31: first annular insulator；32: the second annular insulators；33: insulation Body；100: collector；102: the first notches；101: active material coating layer；103: the first projecting pieces；104: the second notches； 105: third notch；201: the first cathode notches；202: the first cathode projecting pieces；203: the second cathode notches；204: third is negative Pole notch；301: the first positive notches；302: the first positive projecting pieces；303: the second positive notches；304: third anode notch； 400: outermost layer single side negative electrode tab；401: the negative current collector surface of outermost layer single side negative electrode tab 400；500: diaphragm bag；501: First diaphragm notch；502: the second diaphragm notches；503: packaging line；600: insulating trip；601: insulating trip notch；700: outermost layer Single side positive plate；701: the plus plate current-collecting body surface of outermost layer single side positive plate 700；800: diaphragm；900: metal foil；901: Projecting piece.

Specific embodiment

Below in conjunction with attached drawing and specific embodiment, the present invention will be described in detail, herein illustrative examples of the invention And explanation is used to explain the present invention, but not as a limitation of the invention.

Embodiment 1

Referring to a kind of fastening lithium ionic cell shell shown in Fig. 1-16, is present embodiments provided, first is specifically included that Pole shell 1, the second pole shell 2 and insulated enclosure circle 3, wherein one of the first pole shell 1, second pole shell 2 are used as button cell Anode, another cathode as button cell.

Referring to shown in Fig. 1-4, the first pole shell 1 includes first annular shell pieces 11 of the ring at tubular, in first annular shell pieces 11 End formed annular opening, the other end block have first end cover 12.Close to the first pole shell in first annular shell pieces 11 The internal diameter (D1) of annular opening section (being denoted as first annular shell pieces section 111) is wider than in first annular shell pieces close to first end cover section The internal diameter (D2) of (being denoted as the second circular casing segment 112), remembers between first annular shell pieces section 111, the second circular casing segment 112 Are as follows: transition connection section 113.

As the present embodiment signal rather than limit, preferably make first annular shell pieces section 111, the second circular casing segment 112 Between the internal diameter D3 of transition connection section 113 be greater than D2 and be less than D1, so that the inner wall of button cell shell cavity is kept preferable smooth Degree, is conducive to effective use of the lithium ion battery cell body to intracavity space.

Referring to shown in Fig. 5-8, the second pole shell 2 includes second annular shell pieces 21 of the ring at a tubular, in the second annular shell pieces 21 end is formed with to form annular opening, and the other end, which blocks, second end cover 22.

Wherein, the first pole shell 1, the second pole shell 2 preferably use integral structure, the preferred metal foil punching press system of material At.

Referring to shown in Fig. 9-12, insulated enclosure circle 3 includes the second annular shell pieces of two layers of concentric shape and the second pole shell 2 21 annular insulators (being denoted as first annular insulator 31, the second annular insulator 32 respectively) to match, wherein the second annular Insulator 32 is looped around outside first annular insulator 31, and first annular insulator 31,32 integration of the second annular insulator Connection.

Referring to shown in Figure 13-15, in assembly, by 3 sets of insulated enclosure circle the second annular shell pieces 21 in the second pole shell 2 On, first annular insulator 31 is socketed in the outer wall of the second annular shell pieces 21, and the second annular insulator 32 is placed in the second ring The inner wall of shape shell pieces 21, the end face that the second annular shell pieces 21 is located at open end are also exhausted by first annular the 31, second annular of insulator Insulator 33 between edge body 32 is covered.

The the second pole shell 2 for being socketed insulated enclosure circle 3 and the first pole shell 1, the second pole shell 2 are open and are socketed relatively, respectively It is opposite to promote, make the open end of the first annular shell pieces 22 of open end face of the second annular shell pieces 21 from first annular shell pieces 11 Open end packs into, and the opening of the first annular shell pieces section 111 of first annular shell pieces 11 closely surrounds the outer of the second annular shell pieces 22 The annular opening end of wall, first annular shell pieces 11 is closely against the transition of first annular shell pieces across the insulated enclosure circle of socket On the inner wall of linkage section.Under the action of the first pole shell 1, the second pole shell 2, the insulated enclosure circle 3 being socketed between them is in Elastic deformation state makes the first pole shell 1, the second pole shell 2 mutually firmly connect together, at this point, the first pole shell 1, the second pole Shell 2 forms the cavity of a sealing, and two opposite ends of cavity are first end cover 12, second end cover 22, realizes the first pole shell 1, second The opposite socket of pole shell 2 forms the cavity for accommodating soft bag lithium ionic cell, can put shape and the chamber in this cavity The consistent lamination lithium ion soft-package battery of shape.

Therefore using the present embodiment technical solution, constituted using the first pole shell 1, the opposite socket of the second pole shell 2 Buckle type lithium-ion battery shell, structure is easy for installation, is conducive to improve cavity volume as far as possible in the case where size-constrained, from And be conducive to improve the capacity of button cell.

As the present embodiment signal rather than limit, the present embodiment makes to be located at the annular shell pieces of first annular shell pieces 11, second The second annular insulator 32 between 21 is in elastic deformation state under the action of the first pole shell 1, the second pole shell 2, by the Second ring insulator 32 makes the annular shell pieces 21 of first annular shell pieces 11, second, and mutually socket connection connects without screw securely It connects, keeps button cell shell structure simpler, be conducive to the volume for further decreasing shell, improve housing cavity space.

As the present embodiment signal rather than limit, so that first annular insulator 31 is socketed in the second circular casing in embodiment The inner wall of piece 21, first annular shell pieces 11 are socketed in the outer wall of the second annular shell pieces 21, and the second annular insulator 32 is spaced in the Between the one annular shell pieces 21 of annular shell pieces 11, second, the insulator between first annular insulator 31, the second annular insulator 32 It is spaced between the end and second end cover 22 of first annular shell pieces 11, using the technical program, had both realized the first of shell Being dielectrically separated from property between electrode, second electrode, also achieve inner walls be located at housing cavity lithium-ion electric core it Between being dielectrically separated from property, further increase the safety of battery.

In addition, the present invention is socketed insulated enclosure relative to the crimping rolled outward is arranged in negative electrode casing outer at crimping Circle is then with the anode cover of make-up relative to the buckle-shaped technical solution at button cell, and sealing station is very short in the technical solution One ring shape (be from inside to outside in the link position: detain by negative electrode casing-insulated enclosure circle-negative electrode casing-insulated enclosure circle-anode cover The thickness that coincidence is set is larger), and in the present embodiment, the present embodiment insulated enclosure circle and the socket of the second pole shell are specifically One annular insulator 31 is socketed in the inner wall of the second annular shell pieces 21, and first annular shell pieces 11 is socketed in the second annular shell pieces 21 Outer wall, and the insulator between first annular insulator 31, the second annular insulator 32 is spaced in first annular shell pieces 11 Between end and second end cover 22, i.e., insulated enclosure position covers whole inner walls of button cell and being located at outside for button cell Whole inner walls of the pole shell of circle, pole sealing surface is the whole outer walls for being entirely located at the entire annular shell pieces of pole shell of outer ring, close More preferably, and insulation performance is more preferably, also, between the two end cap of the present embodiment button cell shell for sealing property and stable connection It is from inside to outside by the link position between the annular shell pieces 21 of first annular shell pieces 11, second, insulated enclosure circle: first annular Insulator 31- the second annular first annular shell pieces 21 of shell pieces the second annular insulator of 21- 32-, the thickness phase of mutual closed position To smaller, therefore under the premise of button cell is size-constrained, when using the pole shell and sealing ring of same thickness, using this implementation The shell of example structure, the useful space for leaving the lithium ion battery in button cell inner cavity for are bigger instead.

Also, due to annular by first annular shell pieces 11, second between the two end cap of the present embodiment button cell shell Interconnecting piece between shell pieces 21, insulated enclosure circle 3 is from inside to outside: the annular shell pieces 21- second of first annular insulator 31- second The wall body for the button cell that the first annular shell pieces 21 of annular insulator 32- is formed, the connection length have longer length (along the The axial direction of one annular shell pieces 21), in the annular opening end of two opposite pole shells, socket sealing ring is formed compared with the existing technology The wall body of button cell is the technical solution of one layer of pole shell, using the present embodiment technical solution, can use thinner pole shell, use Thinner sealing ring, manufactured button cell shell still have stronger structural soundness, are further conducive in button electricity Under the premise of pool size is limited, the thinner case material of use ensures the structure of pole shell, further in raising button cell For the useful space of lithium ion battery in chamber, be conducive to improve button cell capacity.

As the present embodiment signal rather than limit, the second circular casing segment 112 of the first pole shell 1 of the present embodiment it is interior Diameter is consistent with the internal diameter of first annular insulator 31 in the second annular 21 inner wall of shell pieces is covered, and using the technical solution, makes when the When one pole shell 1, the opposite socket of the second pole shell 2 form button cell shell, the basic internal diameter of the inner wall of shell is consistent, and cavity is in rule Cylindrical body, be more advantageous to improve inside lithium ion battery storing, be conducive to the intracavity space of shell being sufficiently used for lithium The raising of the capacity of ion battery.

As the present embodiment signal rather than limit, preferably set consistent for thickness everywhere in the first pole shell 1；By second Thickness is set as consistent everywhere in pole shell 2.

As the present embodiment signal rather than limit, preferably by the axial direction of the second annular insulator 32 of insulated enclosure circle 3 Length is longer than the axial length of the first insulated enclosure circle, to make when forming button shell, first annular insulator 31 is comprehensively It is closely covered on the inner wall of the second annular shell pieces 21 of the second pole shell 2, and the second annular insulator 32 is closely covered on second The outer wall of annular shell pieces 21, and end of term section is stretched out between the second annular shell pieces 21 and the second circular casing segment 112, the portion of stretching Divide the outer wall for being also closely covered on the second annular shell pieces 21.Using the technical solution, be conducive to further increase button cell shell The insulating properties and sealing tautness of body.

Signal as the present embodiment is unrestricted, preferably make to be located at the annular shell pieces 21 of first annular shell pieces section 111, second it Between the second annular insulator 32 be in elasticity of compression deformed state, by compressed thickness be less than nature thickness, benefit The first pole shell 1, the second pole shell 2 are tightly sleeved together with the elastic deformation power of the second annular insulator 32, improve button electricity The connection tautness of pond shell.

As the present embodiment signal rather than limit, preferably the on the second pole shell 2 second annular shell pieces 21 is pushed up with second The second transition connection section between lid 22 is arranged to chamfering shape, i.e., so that the second transition connection section the second ring with its two sides respectively Shape shell pieces 21, the second top cover 22 are at obtuse angle (being denoted as the first obtuse angle)；Correspondingly, first annular shell pieces section 111 is located at annular Into a bent shape, the bending segment 114 and first annular shell pieces section 111 form obtuse angle (being denoted as the second obtuse angle) for the end setting of opening, Make the second obtuse angle >=the first obtuse angle, makes when forming button cell shell, bending segment 114 is close across 3 face of insulated enclosure circle It fits over outside the transition connection section of the second pole shell 2, without in covering to the second top cover 22.It is preferably square using the present embodiment Case is conducive to further increase the first pole on the basis of packing into first annular shell pieces section 111 convenient for the second annular shell pieces 21 Connection tautness between shell 1, the second pole shell 2.

As the present embodiment signal rather than limit, preferably make the end of the second annular insulator 32 of insulated enclosure circle 3 It fits closely and is covered on the second top cover 22 of the second pole shell 2, using the technical solution it is advantageously ensured that insulated enclosure circle 3 and The socket tautness of two pole shells 2 improves the connection tautness of button cell shell.

As the present embodiment signal rather than limit, make the second annular shell pieces 21 of annular shell pieces 21, second of the present embodiment Tubular cylindrical respectively makes first end cover 12, second end cover 22 in disc-shaped, makes the first pole shell 1,2 opening sleeve of the second pole shell The cylindrical cavity to form a sealing is connect in succession, forms cylindric buckle type lithium-ion battery shell.

As the signal of the present embodiment, the wall thickness of the first pole shell 1 of the present embodiment can be 0.1-02mm, the first pole shell 1 Wall thickness can be 0.1-02mm.

Embodiment 2:

As the present embodiment signal rather than limit, present embodiments provide a kind of large capacity using the present embodiment shell Fastening lithium ionic cell, anode cover of the present embodiment using the first pole shell 1 as button cell, first end cover is anode end cap, the Two pole shells 2 are signal as the negative electrode casing of button cell, and second end cover is negative pole end lid.

Referring to shown in Figure 17-20, the pole piece suitable for button laminated lithium ion battery that the present embodiment uses is wrapped It includes: the active material coating layer 101 of collector 100, at least one side coated in collector 100.

Collector 100 is metal foil.

It is general at this time but be not limited to using aluminium foil as collector 100, the activity material when current pole piece is positive plate Material is lithium ion active material；

It is general at this time but be not limited to using copper foil as collector 100, the activity material when current pole piece is negative electrode tab Material is the negative electrode active materials such as graphitic carbon.

The entire surface shape of the collector 100 of the present embodiment is rounded, be respectively arranged on collector 100 it is radial to An interior recessed notch (under be denoted as the first notch 102) and the radially outward circular edge beyond collector 100 and to overhanging A projecting piece (under be denoted as the first projecting piece 103) out.Active material coating layer 101 uniformly be covered with collector 100 surface, All other region in addition to the first projecting piece 103, even if two surfaces of the first projecting piece 103 of collector 100 are uncoated Active material, and keep its collector 100 exposed outside.

As the signal of the present embodiment, above structure is pressed when the two sides of the collector 100 in the present embodiment and is coated with work Property material when, which is double spread pole piece (Figure 17-20 with double spread be signal)；When only in the one side of collector 100 When being coated with active material by above structure, which is one side coating pole piece.

Therefore using technical solution of the embodiment of the present invention, since the present embodiment uses Special-shaped lithium ion battery pole The shape of piece, pole piece can be matched with the arc-shaped inner wall of the buckle type lithium-ion battery shell of the present embodiment, be bonded its inner wall completely, The intracavity space of button laminated lithium ion battery is made full use of, improves the coated side of the active material of pole piece to the maximum extent, Be conducive to improve the capacity of button cell；

In addition, being provided with the first projecting piece 103 and the first notch 102 on collector 100, make the first projecting piece 103 Electrode as this pole piece is electrically connected with the pole piece of the identical polar of other laminations, the first notch 102 as with this pole piece phase First projecting piece 103 of anti-pole piece faces, and makes the first projecting piece 103 of the pole piece opposite with this pole piece lacking from this pole piece Mouth mutually stretches out, and realizes being staggered for the electrode of opposed polarity, avoids button cell short circuit to the maximum extent.

To sum up, using the present embodiment technical solution, be conducive to the space for the inner cavity for making full use of button cell, be conducive to mention The capacity of high button cell, and be conducive to avoid battery short circuit, improve the safety of battery.

As the present embodiment signal rather than limit, also divide in the two sides of the first projecting piece 103 of the pole piece of the present embodiment It is not provided with the second radially-inwardly recessed notch 104, third notch 105, the second notch 104, third notch 105 is made to distinguish position In the two sides of the first projecting piece 103, gap of two notch as the first projecting piece 103 and the arc edge of collector 100 is adopted It is provided with this and is conducive to position the first projecting piece 103 and pole piece during lamination, it is ensured that polarity stacked on top of one another Identical first projecting piece, about 103 face, avoids pole piece from shifting.

As the present embodiment signal rather than limit, the first notch 102 of pole piece, the first projecting piece 103 can be distinguished Two mutual radial face edges of collector 100 are set, in this way, using laminated body obtained by the stacking of the present embodiment structure pole piece Electrode be located at two both sides diametrically of the cylindrical layer stack, keep the distance between electrode farthest, to greatest extent Ground avoids electric pole short circuit, improves the safety of battery.

Using the positive plate of structure described in above-described embodiment 1, negative electrode tab, the structure of button lamination lithium-ion electric core is made Referring to fig. 2 shown in 1-34.

The button lamination lithium-ion electric core of the present embodiment specifically includes that the button shell of structure shown in embodiment, in shell The laminated body constituted is laminated by positive plate, negative electrode tab in interior intracavitary be provided with of body.

The laminated body specific structure is as follows:

The structure that intracorporal each negative electrode tab is laminated is as described in example 1 above, for convenience, by negative electrode tab radially to Interior the first recessed notch is denoted as: the first cathode notch 201, and the circular edge for radially outward exceeding negative electrode tab is outwardly directed First projecting piece is denoted as: the first cathode projecting piece 202.It is exposed cathode collection on two surfaces of the first cathode projecting piece 202 Fluid.

In design, so that the width of the first cathode notch 201 is wider than the width of the first positive projecting piece 302, make each anode The positive projecting piece 302 of the first of piece stretched out from the first cathode notch 201 of negative electrode tab and with 201 two sides of the first cathode notch also It is provided with certain gap, further facilitates the positioning of the first positive projecting piece 302, and is conducive to avoid from notch stretching First positive projecting piece 302 is in contact with negative electrode tab causes battery short circuit.

The structure that intracorporal each positive plate is laminated is as described in example 1 above, for convenience, by positive plate radially to Interior the first recessed notch is denoted as: the first positive notch 301, and the circular edge for radially outward exceeding positive plate is outwardly directed First projecting piece is denoted as: the first positive projecting piece 302.It is exposed anode collection on two surfaces of the first positive projecting piece 302 Fluid.

In design, so that the width of the first positive notch 301 is wider than the width of the first cathode projecting piece 202, make each cathode First cathode projecting piece 202 of piece stretched out from the first of positive plate the positive notch 301 and with the first 301 two sides of positive notch also There is gap, further facilitate the positioning of the first cathode projecting piece 202, and is conducive to that the first cathode stretched out from the notch is avoided to stretch Slice 202 is in contact with positive plate causes battery short circuit.

Above-mentioned positive plate, negative electrode tab are mutually laminated to obtain whole laminated body cylindrical, in the laminated body, arbitrarily A membrane layer has been respectively separated between adjacent negative electrode tab, positive plate:

Each first cathode projecting piece 202 is laminated face, and the first all cathode projecting pieces 202 faces stacking with all Face above and below first 301 phase of positive notch, and stretched out outside cylinder from the first positive notch 301 of the stacking, stacking is stretched The section of stretching out of each first cathode projecting piece 202 outside welds together jointly out, then electric with the cathode end cap of button cell Connection forms the cathode of button laminated lithium ion battery.

Each first positive projecting piece 302 is laminated face, and all first positive projecting piece 302 faces stacking with all Face above and below first cathode notch, 201 phase, and stretched out outside circular edge from the first cathode notch 201 of the stacking, it will be laminated The section of stretching out of the positive projecting piece 302 of first to extend welds together jointly, then again with the anode end cap of button cell Electrical connection forms the anode of button laminated lithium ion battery.

Therefore it is obtained using the present embodiment technical solution due to using each pole piece shape of the present embodiment for circle Laminated body it is integrally cylindrical, the laminated body to the maximum extent with complete of the inner cavity of the shell of button laminated lithium ion battery Match, make full use of the space of button laminated lithium ion battery, is conducive to the capacity for improving button cell.

Also, make the first positive projecting piece 302 of all phases stacking respectively with 201 phase of the first cathode notch that is layered on top of each other Upper and lower face and it is located in the first cathode notch 201 of the stacking, the positive projecting piece 302 of the first of the stretching and each first cathode The negative electrode tab edge on the both sides of notch 201 is respectively provided with certain gap, can be to avoid the first positive projecting piece 302 and negative electrode tab It contacts and leads to short circuit；

Similarly, make the first cathode projecting piece 202 of all phases stacking respectively with the first positive about 301 notch for being mutually laminated Face and it is located in the first positive notch 301 of the stacking, the first cathode projecting piece 202 of the stretching and each first positive notch The positive plate edge on 301 both sides all has certain gap, and the first cathode projecting piece 202 is avoided to contact and cause with positive plate Short circuit.

To sum up, using the present embodiment technical solution, be conducive to the safety for improving button cell.

As the present embodiment signal rather than limit, the present embodiment can be, but not limited to using diaphragm shown in Figure 22-25 Bag 500, using positive plate bag making technique, each positive plate is individually enclosed in a diaphragm bag 500, specific as follows:

Each positive plate is respectively implanted in diaphragm bag 500, is laid in it in diaphragm bag 500, and diaphragm bag 500 is by upper layer and lower layer Diaphragm face is constituted, and diaphragm bag 500 is identical as the circular profile of positive plate, and interior chamber size is slightly wider than the size of positive plate, and And above and below the arcuate profile of diaphragm bag 500 is identical as the circle-arc profile of negative electrode tab and size is identical when it is laminated with negative electrode tab Layer size is consistent.The first radially-inwardly recessed diaphragm notch 501, the second diaphragm notch are respectively arranged on diaphragm bag 500 502, the positive projecting piece 302 of the first of positive plate is stretched out from the first diaphragm notch 501 of diaphragm bag 500, and the first of positive plate is just Pole notch 301 is located at the second diaphragm notch 502 of diaphragm bag 500.

When carrying out lamination, makes merging have each diaphragm bag 500 of positive plate and each negative electrode tab stacked on top of one another one by one, make to be laminated Each negative electrode tab the first cathode projecting piece 202 respectively with about 502 face of the second diaphragm notch of the diaphragm bag of stacking 500, It is stretched out from the second diaphragm notch 502.

It should be noted that the second diaphragm notch 502 design of diaphragm bag 500 belong to the preferred of the present embodiment and optionally Technical characteristic is designed using the second diaphragm notch 502, is not only improved and is reduced diaphragm cost, is further facilitating merging just Positioning of the pole piece in diaphragm bag 500, avoids shifting, and in stacking, is also used as the stacking face with negative electrode tab Anchor point is conducive to the positioning of each laminates when stacking, avoids laminates from shifting, keep the stacking of laminated body more smooth, improves Stack efficiency and stacking flatness.

As the present embodiment signal rather than limit, be provided with packaging line in the surrounding of the diaphragm bag 500 of the present embodiment 503.The packaging line 503 can enter have the progress hot pressing of diaphragm bag 500 of positive plate that upper and lower level diaphragm is made mutually to heat combination to be opposed The packaging line 503 formed together；Or to merging have positive plate diaphragm bag 500 carry out laser spot welding make upper and lower level every Film mutually heats the packaging line 503 being combined together to form；The packaging line 503 can be continuous, or it is discrete, In preferably use discontinuous 503 structure of packaging line, be further conducive to the immersion of electrolyte using the discontinuous encapsulating structure, mention High fluid injection speed.

As the present embodiment signal rather than limit, as described in Example 1 similarly, on every positive plate, first anode The two sides of projecting piece 302 are also respectively provided with the second radially-inwardly recessed positive notch 303, third anode notch 304.This Two positive notches 303, third anode notch 304 are located at the two sides of the first positive projecting piece 302, form the first anode and stretch out The gap of the arc edge of piece 302 and anode.It is designed using the gap, makes the reference position positioned when stacking to each lamination Other than the first positive projecting piece 302, it may further also be carried out using the second positive notch 303, third anode notch 304 Positioning alignment, avoids laminates from deviating, improves the flatness of stacking.

Similarly, as the signal of the present embodiment rather than limit, as described in Example 1 similarly, in every negative electrode tab, first The two sides of cathode projecting piece 202 are also respectively provided with the second radially-inwardly recessed cathode notch 203, third cathode notch 204, The second cathode notch 203, third cathode notch 204 are located at the two sides of the first cathode projecting piece 202, form the first cathode The gap of the arc edge of projecting piece 202 and cathode.It is designed using the gap, makes the position positioned when stacking to each laminates Set other than the first cathode projecting piece 202, may further also using the second cathode notch 203, third cathode notch 204 into Row positioning, avoids laminates from deviating, improves the flatness of stacking.

In addition, due to respectively in first 302 (the first cathode projecting piece of positive projecting piece of each positive plate (or negative electrode tab) 202) the second positive notch 303, third anode notch 304 (or the second cathode notch 203, third cathode is respectively set in two sides Notch 204), make to occur certain offset even if a certain positive plate (or negative electrode tab), the first positive projecting piece 302 (or first Cathode projecting piece 202) it is also not easy to be in contact with the circular arc rim of negative electrode tab (or positive plate), avoid short circuit.

As the present embodiment signal rather than limit, the buckle type lithium-ion laminated batteries of the present embodiment can use below Structure:

According to the lamination process of the prior art, by the positive plate of the active material coat of double spread, (wherein positive plate can With but be not limited to be embedded in diaphragm bag 500), negative electrode tab be laminated and to form laminated body, keep any positive electrode active materials coat equal Face has a negative electrode active material coat, and in the negative electrode tab of laminated body outermost layer (containing the bottom and top), (spy is denoted as Outermost layer single side negative electrode tab 400) when, the negative electrode tab of one side coating is no longer used using the negative electrode tab of double spread at this time, is made The positive electrode active materials coat of the negative electrode active material coating layer of the outermost layer single side negative electrode tab 400 positive plate adjacent thereto It faces, the exposed negative current collector surface 401 of outermost layer single side negative electrode tab 400 is outwardly.

In cathode end cover side, make the negative pole currect collecting of the outermost layer single side negative electrode tab 400 of cathode end cap and this cathode end cover side Body surface face 401 faces face contact, realizes the company of the cathode of laminated body cathode and fastening lithium ionic cell without welding at this time It connects, be conducive to save space and improve process efficiency.

In anode end cap side, it is placed in an insulating trip 600, insulating trip 600 is made to be spaced in the outermost layer single side cathode of laminated body Between the negative current collector surface 401 of piece 400 and anode end cap, then the first anode welded together on laminated body is stretched Slice 302 is welded on anode end cap, realizes the connection of the anode of laminated body and the anode of fastening lithium ionic cell.

As the present embodiment signal rather than limit, the insulating trip 600 of the present embodiment is preferably but not limited to using Figure 25-28 Shown structure:

The insulating trip 600 is rounded, and one and first diameter that matches of positive projecting piece 302 are provided on circular edge To recessed insulating trip notch 601, and make the width of the insulating trip notch 601 slightly larger than the width of the first positive projecting piece 302 Degree makes the welded together on laminated body first positive projecting piece 302 pass through the insulating trip notch 601 and anode end cap welding Connection, insulating trip 600 include the bending for being conducive to avoid the first positive projecting piece 302 of lamellar body using the insulating gaps.

Embodiment 3:

Referring to shown in Figure 35-41.

Positive plate in the present embodiment can be, but not limited to similarly use positive plate bag making technique with embodiment 2.

The structure of positive plate, negative electrode tab in the present embodiment can be identical as embodiment 1,2.

The button laminated lithium ion battery of the present embodiment is essentially consisted in 2 differences of embodiment:

After the negative electrode tab of the positive plate of each double spread, double spread is layered on top of each other according to the prior art:

1, in the outermost layer negative electrode tab 400 for being laminated to cathode end cover side, which does not use two-sided painting The negative electrode tab of cloth and the negative electrode tab (spy is denoted as outermost layer negative electrode tab 400) for using one side coating, make the outermost layer negative electrode tab 400 The positive electrode active materials coat of negative electrode active material coating layer positive plate adjacent thereto faces, the outermost layer negative electrode tab 400 exposed negative current collector surface 401 outwardly, the negative current collector surface 401 of outermost layer negative electrode tab 400 and cathode End cap faces face contact, and the electricity between the cathode of laminated body and the cathode of fastening lithium ionic cell can be realized without welding at this time Connection is conducive to save space, and improves process efficiency.

2, when being laminated to the outermost layer of anode end cap side, making the positive plate of the outermost layer one side coating, (spy is denoted as most Outer layer positive plate 700), the cathode of the positive electrode active materials coating layer of the outermost layer positive plate 700 double spread adjacent thereto The negative electrode active material coat of piece is opposite, the exposed plus plate current-collecting body surface 701 of the outermost layer positive plate 700 with just Face contact can be realized between the anode of laminated body and the anode of buckle type lithium-ion electricity battery in extreme capping without welding at this time Electrical connection, be conducive to save space and improve process efficiency.

Therefore the present embodiment button laminated lithium ion battery further has the advantages that with respect to embodiment 2

The face cathode end cap of the present embodiment, the outermost layer of anode end cap are respectively the negative electrode tab of one side coating, positive plate, It is realized with cathode end cap, anode end cap in face of face contact respectively by the negative electrode tab of one side coating, the afflux dignity of positive plate The cathode of laminated body, anode are external, completely without welding operation, using the present embodiment technical solution, are more advantageous to raising button The assembly efficiency of formula battery.

Embodiment 4:

Referring to fig. 4 shown in 2-48.

Positive plate in the present embodiment can be, but not limited to embodiment 3 similarly, using positive plate bag making technique.

The structure of positive plate, negative electrode tab in the present embodiment can be identical as implementation, 2,3.

The button laminated lithium ion battery of the present embodiment is essentially consisted in 3 differences of embodiment:

After the positive plate of dual coating, negative electrode tab are layered on top of each other according to the prior art:

1, when being laminated to the outermost negative electrode tab of cathode end cover side, which does not use double spread Negative electrode tab and use one side coating negative electrode tab (spy is denoted as outermost layer negative electrode tab 400), the cathode of the outermost layer negative electrode tab 400 The positive electrode active materials coat of active material coating layer positive plate adjacent thereto faces, the outermost layer negative electrode tab 400 Exposed negative current collector surface 401 is in close contact with negative pole end capping opposite, and stacking can be realized without welding at this time Connection between the cathode of body and the cathode of fastening lithium ionic cell is conducive to save space, and improves process efficiency.

2, when being laminated to the outermost layer of face anode end cap side, in single negative electrode tab, (it can also be with for one side coating For double spread, Figure 42-48 is signal with double spread) one layer of diaphragm 800 is laminated again outside, it is further laminated outside diaphragm 800 The consistent metal foil 900 of the collector of one shape and size and positive plate, by the projecting piece 901 of the metal foil 900 with The positive projecting piece 302 of the first of the positive plate of other stackings welds together jointly, makes the metal foil 900 and positive terminal capping Opposite is in close contact, and being electrically connected between the anode of laminated body and the anode of button cell can be realized without welding at this time, have Conducive to saving space, and improve process efficiency.

Therefore effect acquired by the present embodiment button laminated lithium ion battery is same as Example 3.

Analysis of experimental data:

In order to further illustrate the technical effect of the present embodiment, carry out preparing diameter below are as follows: 16 millimeters, with a thickness of 5.4 The fastening lithium ionic cell of millimeter, button shell are all made of shell structure shown in embodiment 1, wherein the first pole in shell The thickness design of shell 1 is 0.05mm, and the thicker end positioned at end of the second pole shell 2 is with a thickness of 0.1mm, relatively thin end and second end cover 22 thickness is 0.05mm, and the thickness of insulated enclosure circle 3 is 0.05mm.

And experimental data is carried out to these fastening lithium ionic cells and compares analysis:

Comparative example 1: button cell uses flat winding battery core bodies, and the edge and inner walls for winding battery core bodies offset Touching；

Comparative example 2: button cell uses rectangular laminated battery core, and the apex angle and shell of laminated battery core are inconsistent；

Embodiment 2: button cell uses the laminated battery core of the embodiment of the present invention 2, and pole piece therein is all made of embodiment 1 Structure；

Embodiment 3: button cell uses the laminated battery core of the embodiment of the present invention 3, and pole piece therein is all made of embodiment 1 Structure；

Embodiment 4: button cell uses the laminated battery core of the embodiment of the present invention 4, and pole piece therein is all made of embodiment 1 Structure；

It samples respectively sampling ten of above-mentioned each button cell, sampling is tested, obtain real shown in following table one Test data:

Table one: experimental data compares analytical table

Project	Comparative example 1	Comparative example 2	Embodiment 2	Embodiment 3	Embodiment 4
						Capacity	85	90	110	120	120
Discharge-rate	1C	1.5C	3C	3C	3C

Therefore using the present embodiment technical solution, is improving battery capacity compared with the existing technology and improving electricity Significant effect can be obtained on the discharge-rate in pond.

Embodiments described above does not constitute the restriction to the technical solution protection scope.It is any in above-mentioned implementation Made modifications, equivalent substitutions and improvements etc., should be included in the protection model of the technical solution within the spirit and principle of mode Within enclosing.

Claims

1. a kind of fastening lithium ionic cell shell, characterized in that include:

First pole shell, the first annular shell pieces including tubular are equipped with first end cover in one end of the first annular shell pieces, another End is annular opening, and the internal diameter of first annular shell pieces section is wider than the internal diameter of the second circular casing segment in the first annular shell pieces, The first annular shell pieces section is close to the cylindrical-opening of first pole shell, and the second circular casing segment is close to the first end Lid；

Second pole shell, the second annular shell pieces including tubular are equipped with second end cover in one end of the described second annular shell pieces, another End is annular opening；

Insulated enclosure circle, including first annular insulator, the second annular insulator being looped around outside the first annular insulator, The first annular insulator, the second annular insulator integrated design；

The sealing snare in the second circular casing on piece, the described second annular shell pieces be placed on the first annular insulator, Between second annular insulator,

The first annular shell pieces section is covered on outside second annular insulator, described the wrapped up by the insulated enclosure circle The annular opening of second ring shell pieces is against the transition connection section between the first annular shell pieces section and first annular shell pieces section Inner wall, under first pole shell, the effect of the second pole shell, the insulated enclosure circle is in elastic deformation state.

2. fastening lithium ionic cell shell according to claim 1, characterized in that

The internal diameter of the second circular casing segment is identical as the internal diameter of the first annular insulator.

3. fastening lithium ionic cell shell according to claim 1, characterized in that

The first annular insulator covers the inner wall of the described second annular shell pieces comprehensively,

Second annular insulator covers the outer wall of the first annular shell pieces, and the end of second annular insulator comprehensively End is stretched out between the first annular shell pieces section, the second annular shell pieces, closely covers the outer of second top cover.

4. fastening lithium ionic cell shell according to claim 2 or 3, characterized in that

Second annular insulator between the first annular shell pieces section, the second annular shell pieces is in elasticity of compression shape Change state is less than the thickness of nature by compressed thickness.

5. fastening lithium ionic cell shell according to claim 2 or 3, characterized in that

The thickness of first pole shell everywhere is identical.

6. fastening lithium ionic cell shell according to claim 2 or 3, characterized in that

The thickness of second pole shell everywhere is identical.

7. fastening lithium ionic cell shell according to claim 1 or 2 or 3, characterized in that

The second transition connection section and the second annular shell pieces, second between described second annular shell pieces and second top cover Top cover is respectively at the first obtuse angle；

The bending segment that the formation of the end positioned at annular opening of the first annular shell pieces section has one to bend inwards, the bending Section is with the first annular shell pieces section at the second obtuse angle, and the obtuse angle is less than or equal to first obtuse angle, and the bending segment is just To being covered on outside the transition connection section of second pole shell.

8. fastening lithium ionic cell shell according to claim 7, characterized in that

The end of second annular insulator is provided with the parallel-segment parallel with second top cover and second pole shell The consistent third transition connection section of the second transition connection section slope,

The parallel-segment is covered on the outer of second top cover, and the third transition connection section is covered on second transition and connects Connect a section outer wall.

9. a kind of button laminated lithium ion battery, characterized in that include:

Any fastening lithium ionic cell shell of claim 1 to 7,

10. fastening lithium ionic cell according to claim 9, characterized in that

The anode of the laminated lithium ion battery is electrically connected with the first end cover, and cathode is electrically connected with the first end cover.