CN2578995Y - Cylindrical lithium ionic battery - Google Patents
Cylindrical lithium ionic battery Download PDFInfo
- Publication number
- CN2578995Y CN2578995Y CN02249221U CN02249221U CN2578995Y CN 2578995 Y CN2578995 Y CN 2578995Y CN 02249221 U CN02249221 U CN 02249221U CN 02249221 U CN02249221 U CN 02249221U CN 2578995 Y CN2578995 Y CN 2578995Y
- Authority
- CN
- China
- Prior art keywords
- lithium ion
- ion battery
- loam cake
- electrode
- housing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
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- Y02E60/122—
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- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a cylindrical lithium ionic battery, which comprises a cylindrical casing body, an electrode plate of a positive electrode, an electrode plate of a negative electrode, a diaphragm, an electrolyte, etc., wherein the electrode plate of a positive electrode and the electrode plate of a negative electrode are arranged in the cylindrical casing body, wherein one end of the cylindrical casing body is provided with an opening which is covered by an upper cover, and a space between the upper cover and the casing body forms a sealed structure by welding, for instance, sealed welding can be carried out by the adoption of laser welding technique; the upper part of the upper cover is provided with an electrode leading-out end through insulated sealed materials. The insulating sealed materials comprise an internally sealed ring arranged on the internal surface of the upper cover and an externally sealed ring arranged on the external surface of the upper cover, and the electrode leading-out end is arranged on the top of the externally sealed ring; the electrode leading-out end, the externally sealed ring, the upper cover and the internally sealed ring are provided with mutually corresponding rivet holes and are riveted together tightly by rivets, and the lower part of each of the rivets is connected with the electrode plate of a positive electrode or the electrode plate of a negative electrode in the casing body by electrode lugs. The cylindrical lithium ionic battery of the utility model can simplify the process of battery sealing, battery forming, etc., and has the advantage of low manufacture cost; the utility model can improve product reliability and uniformity.
Description
Technical field
The utility model relates to lithium ion battery, more particularly, relates to a kind of column lithium ion battery.
Background technology
Column lithium ion battery is widely used on notebook computer, video camera, Digit camera, PDA (personal digital assistant) and other communication terminal products.Its specification is many, application is wide, demand is big, therefore, how to reduce manufacturing cost, improves reliability of products, consistency, is very important problem in the column lithium ion battery manufacturing.Existing column lithium ion battery all adopts mechanical encapsulation, its structure of the column lithium ion battery of mechanical encapsulation as shown in Figure 1, both positive and negative polarity pole piece, barrier film and electrolyte are housed in housing 21, negative or positive electrode is guided to aluminium flake 25 by lug 26, closed assembly has PCT sheet 24 above the aluminium flake 25, is electrode (can be negative or positive electrode) exit 23 on the PCT sheet 24; Wherein 22 on the sealed again circle in the edge of exit 23, PCT sheet 24 and aluminium flake 25 surrounds.
There is following defective in this mechanical encapsulation:
The first, need the mechanical encapsulation equipment of specialty, as channelling machine, edging machine etc., cost height, efficient are low;
Second, because of lithium ion battery changes into (promptly by the initial charge discharge process, make the active material on the positive and negative electrode pole piece carry out electrochemical activation, form the process of stable electrochemical system) time can produce gas, it can not be sealed before finishing so change into, as shown in Figure 8 at battery, therefore, the machinery of complete open ports seals column lithium ion battery and changes into and must carry out between a drying shed, its chemical synthesis technology complexity, drying shed operating cost height;
The 3rd, the column lithium ion battery that machinery seals is because opening is bigger, electrolyte contacts with the air that changes into humid environment when changing into easily, may cause the electrolyte component failure, the reliability of battery is reduced greatly, even carry out dried to changing into environment, but water content does not still reach the level of PPM level, and the water content of electrolyte requires all below 50PPM;
The 4th, when adopting machinery to seal,, be difficult to form the better seal effect, the as easy as rolling off a log electrolyte leakage that causes owing to reasons such as circular seal ring shape and structure and materials.
The utility model content
The technical problems to be solved in the utility model is, the above-mentioned defective of the column lithium ion battery that seals at existing machinery, the reliability that provides the lower cost of a kind of utilization, simple technology to make is higher, the column lithium ion battery of the better laser seal of consistency.
The technical scheme that its technical problem that solves the utility model adopts is: a kind of column lithium ion battery, the positive and negative electrode pole piece, barrier film and the electrolyte that comprise cylinder shell, cover assembly and be mounted in it, it is characterized in that, a wherein end opening of described cylinder shell, and described opening is covered by a loam cake, form hermetically-sealed construction by welding between described loam cake and the housing, for example adopt laser welding technology to carry out seal welding; Described loam cake is provided with the electrode leads to client of drawing through the insulation material seal.
In cylinder type lithium battery described in the utility model, described insulated enclosure material comprises inner seal ring that is contained in described upper interior surface and the exterior seal ring that is contained in outer surface; Described electrode leads to client is contained in above the described exterior seal ring; Design has the rivet hole of mutual correspondence on described electrode leads to client, exterior seal ring, loam cake and the inner seal ring, and by the rivet impermeable riveting together; The bottom of described rivet is connected with the utmost point of just (bearing) of described enclosure interior by lug, and an other electrode is connected on the housing.
In column lithium ion battery described in the utility model, described housing can be made by a block of metal material punching stretch, an end closure and other end opening; Also can by pipe and be bonded on described pipe wherein the bottom of an end forms, also be by welding formation hermetically-sealed construction between described pipe and the bottom.
In column lithium ion battery described in the utility model, injecting electrolytic solution hole design can be covered or designs top on described at described housing, like this, after battery injects electrolyte, availablely be with flexible gummed paper that liquid injection hole is sealed, the gas that is produced when battery changes into can be washed the elasticity gummed paper open and drain outward, because liquid injection hole thin (being usually designed to the circular hole of Ф 0.8～1.5mm size) reduces the chance that enclosure interior electrolyte contacts with extraneous air greatly.Described liquid injection hole is spherical or cylindrical metal sealing by one.
In column lithium ion battery described in the utility model, the design of the explosion-proof ring that prevents to explode can be covered or is located at the top of described housing on described.
In column lithium ion battery described in the utility model, described loam cake and housing can adopt metals such as cold-rolled steel sheet, stainless steel, aluminum or aluminum alloy to make.
Compared with prior art, because column lithium ion battery of the present utility model adopts laser welding technology that loam cake and cylinder shell are sealed, and electrode leads to client is sealed by interior exterior seal ring, technology such as simplified battery seal greatly, change into makes this lithium ion battery can carry out fluid injection in general environment, change into operation; Reduce manufacturing cost widely, and improved reliability of products and consistency.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the structural representation of the column lithium ion battery of existing machinery encapsulation;
Fig. 2 is the stereogram of the utility model column lithium ion battery;
Fig. 3 is the partial sectional view of column lithium ion battery shown in Fig. 2;
Fig. 4 is the cutaway view of the housing that punching stretch forms in the utility model;
Fig. 5 is the cutaway view that is added the housing that bottom is welded in the utility model by pipe;
Fig. 6 is that liquid injection hole is opened partial cutaway diagrammatic sketch when loam cake in the utility model;
Fig. 7 is the partial cutaway diagrammatic sketch when liquid injection hole is opened on shell wall in the utility model;
Fig. 8 is the chemical synthesis technology schematic diagram of existing machinery encapsulation lithium ion battery;
Fig. 9 is the chemical synthesis technology schematic diagram of laser welding formula encapsulation lithium ion battery in the utility model.
Embodiment
Be the stereogram of the utility model column lithium ion battery as shown in Figure 2, Fig. 3 is the schematic diagram when the center line of column lithium ion battery shown in Fig. 2 is cut open.Wherein, form hermetically-sealed construction by the laser welding mode between cylinder shell 1 and loam cake 3, the arc thick line among the figure is the weld seam 2 between housing 1 and the loam cake 3.Be provided with a small-bore injecting electrolytic solution hole 6 on the right of loam cake 3, this liquid injection hole is sealed up by a Metal Ball, and an also available metal column seals.Be provided with on the left side of loam cake 3 and be used to prevent the explosion-proof ring 4 of exploding.
As can be seen from Figure 3, the diameter of loam cake 3 equals the external diameter or the internal diameter of housing 1, directly cover during assembling on the end face of housing 1 or panel in the inner of housing, weld then.The central authorities of loam cake 3 are concave configuration, and its inner surface is equipped with inner seal ring 8, and outer surface is equipped with exterior seal ring 9; Electrode leads to client 5 is housed above the exterior seal ring 9, and this electrode leads to client can be anodal, also can be negative pole.Wherein, the center of electrode leads to client 5, exterior seal ring 9, loam cake 3 and inner seal ring 8 offers the rivet hole of mutual correspondence, and by rivet 7 impermeable rivetings together; The bottom of rivet 7 is connected with the battery pole piece (negative or positive electrode) of housing 1 inside by lug 10 again, and electric current is guided to electrode leads to client 5.As can be seen from Figure 3, in order to guarantee sealing effectiveness, the rivet hole internal diameter at electrode leads to client 5, exterior seal ring 9 and inner seal ring 8 centers is identical, and the rivet hole of loam cake 3 is more bigger, rivet hole along interior seal cover 9 is provided with the small circle ring that projects upwards, the external diameter of this small circle ring just in time equals the rivet hole internal diameter of loam cake 3, highly equals or be slightly larger than the thickness of loam cake 3; After the assembling, can realize the tight contact between the inside and outside seal cover 8,9, guarantee sealing effectiveness.
In the utility model, housing 1 and loam cake 3 can be made by metals such as cold-rolled steel sheet, stainless steel, aluminum or aluminum alloy.Housing 1 wherein can be made by a block of metal material punching stretch, and as shown in Figure 4, an end opening of this housing 111, the other end form close mouth automatically when punching press; Certainly, also can be made up of pipe 112 and the bottom 113 that is contained in the bottom, as shown in Figure 5, also be to form hermetically-sealed construction by laser welding between pipe 112 and the bottom 113.
As shown in Figure 6, in the utility model, also the diameter of loam cake 3 can be designed to equal the internal diameter of housing 1, loam cake is embedded in the inwall of housing 1 during assembling, carries out seal welding then.
As shown in Figure 7, in the utility model, also liquid injection hole 6 can be located at the side wall upper part of housing 1, seal by a Metal Ball or metal column again.
Chemical synthesis technology below by two kinds of packaged batteries of contrast further specifies advantage of the present utility model, be illustrated in figure 8 as the schematic diagram of lithium ion battery when carrying out chemical synthesis technology of mechanical encapsulation, be illustrated in figure 9 as the schematic diagram of lithium ion battery when carrying out chemical synthesis technology of laser welding formula encapsulation in the utility model, what wherein the both positive and negative polarity of battery connected is the instrument of changing into 30.As can be seen from Figure 8, the battery of mechanical type encapsulation can not seal it before finishing changing into; As can be seen from Figure 9, in the utility model, loam cake 3, electrode leads to client 5, rivet 7, inner seal ring 8 and exterior seal ring 9 all install before changing into, and with gummed paper liquid injection port 6 is touched earlier, chemical synthesis technology is sealed liquid injection port 6 with steel ball after finishing again, as seen electrolyte contacts with surrounding air changing into Shi Buhui, can guarantee the premium properties of battery, and has simplified battery seal greatly and technology such as changed into.
The cylindrical lithium ion battery of the laser seal that the utility model provides can be applied to notebook computer, video camera, digital camera, PDA and various mobile communication equipment.Its reliability is much better than existing mechanical and seals cylindrical lithium ion battery.
Claims (9)
1, a kind of column lithium ion battery, comprise cylinder shell (1) and be contained in described housing (1) interior positive/negative plate, barrier film and electrolyte etc., it is characterized in that, a wherein end opening of described cylinder shell (1), and by a loam cake (3) described opening is covered, form hermetically-sealed construction by laser welding between described loam cake (3) and the housing (1); Described loam cake (3) is provided with the electrode leads to client (5) of drawing through the insulation encapsulant.
2, column lithium ion battery according to claim 1 is characterized in that, described insulated enclosure material comprises inner seal ring (8) that is contained in described loam cake (3) inner surface and the exterior seal ring (9) that is contained in outer surface; Described electrode leads to client (5) is contained in above the described exterior seal ring (9); Described electrode leads to client (5), exterior seal ring (9), loam cake (3) and inner seal ring (8) are gone up the rivet hole that design has mutual correspondence, and by rivet (7) impermeable riveting together; The bottom of described rivet (7) is connected by the inner pole piece of just (bearing) of lug (10) and described housing (1).
3, column lithium ion battery according to claim 1 and 2 is characterized in that, described housing (1) is the cylinder of the end closure other end opening made by a block of metal material punching stretch.
4, column lithium ion battery according to claim 1 and 2 is characterized in that, described housing (1) by pipe and be bonded on described pipe wherein the bottom of an end forms, between described pipe and the bottom by laser welding formation hermetically-sealed construction.
5, column lithium ion battery according to claim 1 and 2 is characterized in that, going up design at described loam cake (3) has a small-bore injecting electrolytic solution hole, and described liquid injection hole is spherical or cylindrical metal sealing by one.
6, column lithium ion battery according to claim 1 and 2 is characterized in that, is provided with a small-bore injecting electrolytic solution hole on the top of described housing (1), and described liquid injection hole is spherical or cylindrical metal sealing by one.
7, column lithium ion battery according to claim 1 and 2 is characterized in that, is provided with on the top of described loam cake (3) or housing (1) to prevent the explosion-proof ring of exploding.
8, column lithium ion battery according to claim 1 and 2 is characterized in that, described loam cake (3) and housing (1) can adopt cold-rolled steel sheet, stainless steel, aluminium or aluminium to close and make.
9, column lithium ion battery according to claim 1 is characterized in that, forms hermetically-sealed construction by laser welding between described housing (1) and the loam cake (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02249221U CN2578995Y (en) | 2002-09-19 | 2002-09-19 | Cylindrical lithium ionic battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN02249221U CN2578995Y (en) | 2002-09-19 | 2002-09-19 | Cylindrical lithium ionic battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2578995Y true CN2578995Y (en) | 2003-10-08 |
Family
ID=33719693
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN02249221U Expired - Lifetime CN2578995Y (en) | 2002-09-19 | 2002-09-19 | Cylindrical lithium ionic battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2578995Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2007019754A1 (en) * | 2005-08-19 | 2007-02-22 | Shenzhen Bak Battery Co., Ltd | Cover plate assembly for lithium ion battery, and battery using the same |
| CN100423354C (en) * | 2004-03-30 | 2008-10-01 | 三星Sdi株式会社 | Can type lithium ion secondary battery |
| CN102820488A (en) * | 2012-07-25 | 2012-12-12 | 深圳市海太阳实业有限公司 | Formation encapsulation method for lithium ion battery |
| CN103137343A (en) * | 2012-12-29 | 2013-06-05 | 惠州亿纬锂能股份有限公司 | Cylinder battery capacitor |
| CN103280543A (en) * | 2013-05-21 | 2013-09-04 | 深圳市力可兴电池有限公司 | Structure of cylindrical secondary battery and manufacturing method |
| US9147865B2 (en) | 2012-09-06 | 2015-09-29 | Johnson Controls Technology Llc | System and method for closing a battery fill hole |
-
2002
- 2002-09-19 CN CN02249221U patent/CN2578995Y/en not_active Expired - Lifetime
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100423354C (en) * | 2004-03-30 | 2008-10-01 | 三星Sdi株式会社 | Can type lithium ion secondary battery |
| WO2007019754A1 (en) * | 2005-08-19 | 2007-02-22 | Shenzhen Bak Battery Co., Ltd | Cover plate assembly for lithium ion battery, and battery using the same |
| CN102820488A (en) * | 2012-07-25 | 2012-12-12 | 深圳市海太阳实业有限公司 | Formation encapsulation method for lithium ion battery |
| US9147865B2 (en) | 2012-09-06 | 2015-09-29 | Johnson Controls Technology Llc | System and method for closing a battery fill hole |
| CN103137343A (en) * | 2012-12-29 | 2013-06-05 | 惠州亿纬锂能股份有限公司 | Cylinder battery capacitor |
| CN103137343B (en) * | 2012-12-29 | 2015-11-18 | 惠州亿纬锂能股份有限公司 | A kind of cylinder battery capacitor |
| CN103280543A (en) * | 2013-05-21 | 2013-09-04 | 深圳市力可兴电池有限公司 | Structure of cylindrical secondary battery and manufacturing method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP02 | Change in the address of a patent holder |
Address after: Two road 518118 Guangdong city of Shenzhen province Pingshan Pingshan biling community bunker No. 38 Patentee after: HYB Battery Co., Ltd. Address before: 518111 Fumin Industrial Zone, 13-15 Town, Guangdong, Shenzhen, Pinghu Patentee before: HYB Battery Co., Ltd. |
|
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20120919 Granted publication date: 20031008 |