CN100530763C - Housing and lithium secondary battery using same - Google Patents
Housing and lithium secondary battery using same Download PDFInfo
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- CN100530763C CN100530763C CNB2006100820684A CN200610082068A CN100530763C CN 100530763 C CN100530763 C CN 100530763C CN B2006100820684 A CNB2006100820684 A CN B2006100820684A CN 200610082068 A CN200610082068 A CN 200610082068A CN 100530763 C CN100530763 C CN 100530763C
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- shell
- diapire
- gathering sill
- secondary battery
- lithium secondary
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- 229910052744 lithium Inorganic materials 0.000 title claims description 107
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims description 105
- 238000004049 embossing Methods 0.000 claims abstract description 94
- 230000000994 depressogenic effect Effects 0.000 claims description 5
- 238000005452 bending Methods 0.000 abstract description 5
- 238000009413 insulation Methods 0.000 description 21
- 239000003792 electrolyte Substances 0.000 description 10
- 230000000712 assembly Effects 0.000 description 8
- 238000000429 assembly Methods 0.000 description 8
- 238000000034 method Methods 0.000 description 6
- 229910000838 Al alloy Inorganic materials 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 4
- 229910052782 aluminium Inorganic materials 0.000 description 4
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 4
- 238000013461 design Methods 0.000 description 4
- 230000001771 impaired effect Effects 0.000 description 4
- 238000012360 testing method Methods 0.000 description 4
- 239000000463 material Substances 0.000 description 3
- 229910000990 Ni alloy Inorganic materials 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 238000000354 decomposition reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 230000001788 irregular Effects 0.000 description 2
- 150000002641 lithium Chemical class 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 229910052759 nickel Inorganic materials 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000011076 safety test Methods 0.000 description 2
- 238000003466 welding Methods 0.000 description 2
- 229910003307 Ni-Cd Inorganic materials 0.000 description 1
- 229910018095 Ni-MH Inorganic materials 0.000 description 1
- 229910018477 Ni—MH Inorganic materials 0.000 description 1
- 229910018605 Ni—Zn Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- 230000008859 change Effects 0.000 description 1
- 238000011156 evaluation Methods 0.000 description 1
- 230000003116 impacting effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000007634 remodeling Methods 0.000 description 1
- 238000011160 research Methods 0.000 description 1
Images
Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings; Jackets or wrappings
- H01M50/102—Primary casings; Jackets or wrappings characterised by their shape or physical structure
- H01M50/103—Primary casings; Jackets or wrappings characterised by their shape or physical structure prismatic or rectangular
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/50—Current conducting connections for cells or batteries
- H01M50/572—Means for preventing undesired use or discharge
- H01M50/574—Devices or arrangements for the interruption of current
- H01M50/578—Devices or arrangements for the interruption of current in response to pressure
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Sealing Battery Cases Or Jackets (AREA)
- Secondary Cells (AREA)
- Battery Electrode And Active Subsutance (AREA)
Abstract
The invention discloses a secondary Li battery, which is characterized by the following: forming guide groove in the bottom wall and lateral wall of battery case; bending the case corresponding to the longitude axis symmetrically when the secondary Li battery is squeezed from longitude axis direction; preventing electrode boards of electrode component from short-circuiting; improving safety of secondary Li battery; forming partial projection on the embossing part of case to improve safety of secondary Li battery.
Description
Technical field
The present invention relates to a kind of shell and use the lithium secondary battery of this shell.More particularly, this shell that the present invention relates to and use the characteristics of the lithium secondary battery of this shell to be, on the diapire of this lithium secondary battery shell and sidewall, be formed with gathering sill, make lithium secondary battery be subjected to along the time perpendicular to the extruding of longitudinal axis direction, shell is around its longitudinal axis symmetric curvature, can prevent from thus between battery lead plate, to be short-circuited, and then can improve the fail safe of lithium secondary battery.
In addition, the lithium secondary battery that the present invention relates to a kind of shell and use this shell, wherein, on the diapire of lithium secondary battery shell, form the embossing part and make its inner projection towards shell, cause at lithium secondary battery and be subjected to along the time perpendicular to the extruding of longitudinal axis direction, the diapire of shell is outwardly-bent, and then improves the fail safe of lithium secondary battery.
Require to enjoy the priority that the sequence number of submitting to Korean Patent office respectively on March 24th, 2005 and on April 25th, 2005 is the patent application of being called of 10-2005-0024670 and 10-2005-0034228 " shell and use the lithium secondary battery (CAN ANDLITHIUM SECONDARY BATTERY USING THE SAME) of this shell " according to 35U.S.C. § 119 the application.
Background technology
In recent years, to manufacture in light weight as the portable radio machine of camcorders, mobile phone and portable computer and so on and be equipped with the equipment of various functions, therefore the secondary cell as the power supply of these portable radio machines also carried out active research.As an example, secondary cell comprises Ni-Cd battery, Ni-MH battery, Ni-Zn battery and lithium secondary battery.Wherein, lithium secondary battery is a rechargeable battery, can be made into to have compact dimensions and battery capacious.Lithium secondary battery has the high operating voltage and the high-energy-density of per unit weight, so lithium secondary battery is widely used in advanced electronic technology field.
Lithium secondary battery can be by will comprising positive electrode plate, negative electrode plate and dividing plate electrode assemblie together with electrolyte insert in the shell, the upper opening with the cap assemblies can obtains then.Usually, shell is made by deep draw (deep drawing) method by aluminium or aluminium alloy.In addition, the lower surface of shell is the plane basically.
Electrode assemblie can by with positive electrode plate and negative electrode plate is reeled together and dividing plate is clipped in them among form.Electrode film combines with positive electrode plate and the end of electrode film projects upwards from electrode assemblie.Negative electrode plate combines with negative electrode plate and the end of negative electrode plate projects upwards from electrode assemblie.Electrode film and negative electrode plate are spaced a predetermined distance from, cause electrode film and negative electrode plate electric insulation.Usually, the negative electrodes sheet is made by nickel.
Cap assemblies comprises cover plate, insulation board, end plate and electrode terminal.Cap assemblies is installed in the insulation shell and is assembled into the upper opening place of shell, can thus.Cover plate is made by the corresponding metallic plate of the upper opening of size and dimension and shell.Cover plate is positioned at the central authorities of upper opening, and its first terminal hole that is received electrode terminal is run through.When electrode terminal is inserted the first terminal hole, around electrode terminal, tubular gasket (gasket tube) is installed, so that electrode terminal and cover plate insulation.Electrode terminal is connected with the negative electrode plate of negative electrode plate or is connected with the electrode film of positive electrode plate, so electrode terminal can be used as negative terminal or positive terminal.On a side of cover plate, form electrolyte hand-hole with preliminary dimension.After cap assemblies being assemblied on the upper opening of shell, electrolyte can be injected shell by the electrolyte hand-hole.Then, with plug seal electrolyte hand-hole.
Insulation board is made by the insulating material identical with the material of described pad, and it combines with the lower surface of cover plate.Pass insulation board with the first terminal hole centering of cover plate and second terminal hole that is inserted with electrode terminal.Insulation board is formed on the lower surface of cover plate, and insulation has the corresponding retaining groove of size and dimension of size and dimension and end plate, therefore end plate can be fixed in the retaining groove.
End plate is made by the Ni alloy and is combined with the lower surface of insulation board.Pass end plate with the first terminal hole centering of cover plate and the 3rd terminal hole that is inserted with electrode terminal.Because the electrode terminal in the first terminal hole of insertion cover plate is by tubular gasket and end plate insulation, end plate can be electrically connected while and cover plate electric insulation with electrode terminal.
Simultaneously, the negative electrode plate that combines with negative electrode plate is soldered on the side of end plate, and the electrode film that combines with positive electrode plate is soldered on the opposite side of cover plate.By resistance welded or laser welding the negative, positive electrode slice is welded on end plate and the cover plate.Usually, preferably use resistance welded.
In recent years, because the energy density of lithium secondary battery improves, the size of lithium secondary battery is littler, causes lithium secondary battery easier in impacting and pushing and damage.Therefore, when lithium secondary battery is impacted and push, the electrode assemblie in the shell will be out of shape, thereby may cause short circuit between the electrode terminal, cause the lithium secondary battery accidental ignition or burst.
Particularly in vertical squeeze test process of lithium secondary battery being carried out one of safety test, when lithium secondary battery centered on the longitudinal axis distortion because of being applied to vertical extruding force on it, shell was pushed fully and can not be formed predetermined regular shape.So, irregular pressure is applied on the electrode assemblie in the shell partly, cause between the battery lead plate of electrode assemblie and may be short-circuited, cause lithium secondary battery accidental ignition or blast.Therefore, need to improve design to shell and lithium battery, make electrode assemblie be difficult for because of impact and extruding impaired.
Summary of the invention
Therefore, the purpose of this invention is to provide a kind of improvement design that is used for the shell of lithium secondary battery.
Another object of the present invention provides a kind of lithium secondary battery that adopts described novel shell.
Another purpose of the present invention provides a kind of shell and adopts the compact lithium secondary battery of this shell, and this shell is designed to when being squeezed power, can prevent that the electrode assemblie in the shell is impaired.
In view of the above, the problem that the present invention is mentioned above being intended to solve, the lithium secondary battery that the purpose of this invention is to provide a kind of shell and use this shell, on the diapire of this lithium secondary battery shell and sidewall, form gathering sill, make lithium secondary battery be subjected to along the time perpendicular to the extruding of longitudinal axis direction, shell is crooked symmetrically around its longitudinal axis, can prevent from thus to be short-circuited between the battery lead plate, and can improve the fail safe of lithium secondary battery.
The lithium secondary battery that another purpose of the present invention provides a kind of shell and uses this shell, wherein on the diapire of lithium secondary battery shell, form the embossing part and make it interior section projection towards shell, be subjected to along the time at lithium secondary battery perpendicular to the pressure of longitudinal axis direction, the diapire of shell is outwardly-bent, improves the fail safe of lithium secondary battery thus.
According to an aspect of the present invention, a kind of shell is provided, this shell comprises: the diapire that is oppositely arranged with upper opening, place, the both sides of diapire is provided with first gathering sill in the diapire of shell, it is along the longitudinal extension perpendicular to diapire, shell is suitable for the hold electrodes assembly, and electrode assemblie comprises positive electrode plate, negative electrode plate and be arranged at dividing plate between the negative electrodes plate that shell also is convenient to through upper opening electrode assemblie be inserted in this shell.。
Shell also can comprise a pair of long sidewall and a pair of short sidewall that is set between diapire and the upper opening, and shell is box-like.Perhaps, shell can comprise a pair of long sidewall and a pair of short sidewall that is set between diapire and the upper opening, and wherein, the short sidewall of shell is the curved surface shape, and shell has oval cross section.Each first gathering sill can have bar shaped.Each first gathering sill can have a kind of cross section that is selected from the group of being made up of arc, rectangle and triangle.The length of each first gathering sill is at least 25% of diapire width.The width of each first gathering sill can be less than 3mm.The width of each first gathering sill can be less than 1mm.The degree of depth of each first gathering sill can be less than 25% of bottom wall thickness.The degree of depth of each first gathering sill can be less than 10% of bottom wall thickness.Each first gathering sill can be formed on the outer surface of outer shell bottom wall.Each first gathering sill can extend from the front-end and back-end of outer shell bottom wall and be depressed in the outer surface of outer shell bottom wall.Each first gathering sill can be arranged on the inner surface of shell.Each first gathering sill can be along diapire from shell one of long sidewall extend.Distance between the nearest side of each first gathering sill and diapire is not more than 25% of diapire length.Distance between the nearest side of each first gathering sill and diapire can diapire length 10% within.
Shell also comprises second gathering sill, and it longitudinally is formed on the middle body of one of long sidewall.Second gathering sill can be bar shaped.Second gathering sill has the shape of cross section as arc, rectangle or triangle and so on.The length of second gathering sill can be the long sidewall that is provided with second gathering sill height at least 50%.The width of second gathering sill can be less than 3mm.The width of second gathering sill can be narrower than 1mm.The degree of depth of second gathering sill can be less than 25% of the thickness of the long sidewall that is provided with second gathering sill.The degree of depth of second gathering sill can be less than 10% of the thickness of the long sidewall that is provided with second gathering sill.
According to a further aspect of the invention, provide a kind of lithium secondary battery, it comprises: have positive electrode plate, negative electrode plate and be arranged on the electrode assemblie of the dividing plate between the negative electrodes plate; Comprise the shell of being located at the diapire relative with upper opening, wherein, place, the both sides of outer shell bottom wall is provided with first gathering sill in diapire, and it extends along the longitudinal direction perpendicular to diapire.Shell is used for the hold electrodes assembly, and shell also is convenient to through upper opening electrode assemblie be inserted in the shell, and electrode assemblie is set in the shell.
The width of each first gathering sill can be less than 3mm.Battery case also comprises long sidewall of being located between diapire and the upper opening and second gathering sill of being located in the long sidewall, and second gathering sill longitudinally is located at the middle body of the long sidewall of shell.The width of second gathering sill is less than 3mm.
According to another aspect of the invention, a kind of shell is provided, this shell comprises: the diapire that is oppositely arranged with upper opening, wherein, place, the both sides of outer shell bottom wall is provided with the embossing part in diapire, each embossing part is towards shell interior section projection, and shell is suitable for holding the electrode assemblie that comprises positive electrode plate, negative electrode plate and be located at the dividing plate between the negative electrodes plate, and shell also is convenient to through upper opening electrode assemblie be inserted in the shell.
Shell also can comprise a pair of long sidewall and a pair of short sidewall that is set between diapire and the upper opening, and shell is box-like.Shell also can comprise a pair of long sidewall and a pair of short sidewall that is set between diapire and the upper opening, and wherein, the short sidewall of shell is the curved surface shape, and shell has oval cross section.Each embossing partly has a kind of shape that is selected from the group of being made up of bar shaped, taper shape and hemisphere.Each embossing part with the nearest side of diapire spaced apart and with the nearest side parallel alignment of diapire.Distance between the nearest side of one of embossing part and diapire is not more than 25% of diapire length.Distance between the nearest side of one of embossing part and diapire is not more than 10% of diapire length.Each embossing partly is set in 50% the zone corresponding to the diapire side edge length at least.These embossing parts are located in the diapire as single closed annular together.These embossing parts are set to rectangular ring and elliptical annular together.Distance between the nearest side of these residing zones of embossing part and diapire is not more than 25% of the vertical side edge length of diapire, and should the zone and nearest vertical side between distance be not more than 25% of diapire side edge length.Distance between the nearest side of these residing zones of embossing part and diapire is not more than 10% of the vertical side edge length of diapire, and should the zone and nearest vertical side between distance be not more than 10% of diapire side edge length.The height of each embossing part projection is between 0.1 to 0.5mm.The height of each embossing part is greater than the thickness of diapire.
In accordance with a further aspect of the present invention, provide a kind of lithium secondary battery, it comprises: have positive electrode plate, negative electrode plate and be arranged on the electrode assemblie of the dividing plate between the negative electrodes plate; Comprise and the shell of the opposed diapire of upper opening that wherein, place, the both sides of outer shell bottom wall is provided with the embossing part in diapire.Shell is suitable for the hold electrodes assembly, and shell also is convenient to through upper opening electrode assemblie be inserted in the shell.The embossing part can have a kind of shape that is selected from the group of being made up of bar shaped, taper shape and hemisphere.
Description of drawings
By detailed description below in conjunction with accompanying drawing, can make more fully evaluation to the present invention, a lot of attached advantages of the present invention will be more apparent, represent same or similar parts with identical Reference numeral in the accompanying drawings.
Fig. 1 is the decomposition diagram of lithium secondary battery;
Fig. 2 A is the perspective view of the lithium secondary battery shell of first embodiment of the invention;
Fig. 2 B is the front view of the shell shown in Fig. 2 A;
Fig. 3 is the front view of the lithium secondary battery shell of second embodiment of the invention;
Fig. 4 is the front view of the lithium secondary battery shell of third embodiment of the invention;
Fig. 5 A is the perspective view of the lithium secondary battery shell of four embodiment of the invention;
The sectional view that Fig. 5 B dissects along A-A line among Fig. 5 A for shell shown in Fig. 5 A;
Fig. 6 is the perspective view of the lithium secondary battery shell of fifth embodiment of the invention;
Fig. 7 is the bottom view of shell shown in Figure 6, the figure shows the extruding operating state of shell shown in Figure 6 down;
Fig. 8 A is the perspective view of the lithium secondary battery shell of sixth embodiment of the invention;
The sectional view that Fig. 8 B dissects along B-B line among Fig. 8 A for the shell shown in Fig. 8 A;
Fig. 9 A is the perspective view of the lithium secondary battery shell of seventh embodiment of the invention;
The sectional view that Fig. 9 B dissects along C-C line among Fig. 9 A for the shell shown in Fig. 9 A;
Figure 10 A is the perspective view of the lithium secondary battery shell of eighth embodiment of the invention;
The sectional view that Figure 10 B dissects along D-D line among Figure 10 A for the shell shown in Figure 10 A;
Figure 11 is the perspective view of the lithium secondary battery shell of ninth embodiment of the invention;
Figure 12 is the sectional view under the shell extruding shown in Fig. 8 A and the 8B.
Embodiment
Again referring to Fig. 1, Fig. 1 is the decomposition diagram of lithium secondary battery now.Can obtain as shown in Figure 1 lithium secondary battery by electrode assemblie 112 and electrolyte being contained in together in the shell 110 then upper opening 110a with cap assemblies 120 cans 110, this electrode assemblie comprises positive electrode plate 113, negative electrode plate 115 and dividing plate 114.Usually, shell 110 is made by deep punch method by aluminum or aluminum alloy.In addition, the lower surface 110b of shell 110 is the plane substantially.
Electrode terminal 130 is connected with the negative electrode plate 117 of negative electrode plate 115 or is connected with the electrode film 116 of positive electrode plate 113, so electrode terminal 130 can be used as negative terminal or positive terminal.
Simultaneously, the negative electrode plate 117 that will combine with negative electrode plate 115 is welded on the side of end plate 160, and the electrode film 116 that will combine with positive electrode plate 113 is welded on the opposite side of cover plate 140.By resistance welded or laser welding negative, positive electrode slice 117 and 116 is welded on end plate 160 and the cover plate 140.Usually the preferred resistance welded of using.
In recent years,, make the size of lithium secondary battery littler because the energy density of lithium secondary battery increases, thus lithium secondary battery on being applied to it impact and risk of crushing easier to be impaired.Therefore, when lithium secondary battery was subjected to this impact and extruding, the electrode assemblie that is contained in the shell may be out of shape, and may cause short circuit between the electrode terminal, causes lithium secondary battery accidental ignition or blast.
Particularly, as shown in Figure 1, in the vertical squeeze test process to one of safety test of lithium secondary battery, when lithium secondary battery centered on longitudinal axis b distortion because of being applied to longitudinal pressure Fa on it, shell was pushed fully and can not be formed predetermined regular shape.Thereby, irregular pressure is applied on the electrode assemblie that is contained in the shell partly, cause between the battery lead plate of electrode assemblie and may be short-circuited, cause lithium secondary battery accidental ignition or blast.Therefore need to improve design to shell and lithium battery, make electrode assemblie be difficult for because of impact and extruding force impaired.
Translate into Fig. 2 A and 2B now.Fig. 2 A is the perspective view of shell 200 of the lithium secondary battery of first embodiment of the invention, and Fig. 2 B is the front view of the shell 200 shown in Fig. 2 A.Shown in Fig. 2 A and 2B, the shell 200 of the lithium secondary battery of first embodiment of the invention is formed into box-like, and it comprises long sidewall 210, short sidewall 220 and diapire 230.Box-shaped casing 200 can have the various shape of cross sections as rectangle or ellipse and so on.In addition, shell 200 is made by metal material.Shell 200 is preferably made by in light weight and pliable and tough aluminum or aluminum alloy.Certainly, the present invention is not limited to this.Usually, the thickness of long sidewall 210 and short sidewall 220 is greatly in 0.2 to 0.4mm scope.In addition, the thickness of diapire 230 is greatly in 0.2 to 0.7mm scope.Preferably make shell 200 by deep punch method, and long sidewall 210 and short sidewall 220 and diapire 230 whole formation.
In detail, shell 200 comprises the upper opening 200a on the top that is formed at shell, so that put into and take out electrode assemblie.Relative with upper opening 200a is diapire 230.Shell 200 also comprises the sidewall that is made of the long sidewall 210 of broad and narrower short sidewall 220.Long sidewall 210 each interval preset distances also face with each other, and form the front surface and the rear surface of shell 200 thus.In addition, short sidewall 220 each interval preset distances also face with each other, and form two side surfaces of shell 200 thus.If shell 200 is essentially rectangular box-like (rectangular cross section), then long sidewall 210 and short sidewall 220 are flat shape.Yet if shell 200 is elliptical cylinder-shape (oval cross section) rather than rectangular box-like, short sidewall 220 is level and smooth curved surface shape, and making does not have the boundary line between long sidewall 210 and short sidewall 220.
Diapire 230 constitutes the bottom of shell 200, and it is set at the outer surface of shell, and comprises the bar shaped gathering sill 240 of predetermined length.In detail, gathering sill 240 is for having the bar shaped of predetermined length, and its vertical cross-section is arc or rectangle.Yet the present invention is not specifically limited the shape of the vertical cross-section of each gathering sill 240.Preferably make the marginal portion of each gathering sill 240 be bending, to improve the intensity of shell 200.Each gathering sill 240 extends towards another long sidewall from the end portion of a long sidewall 230a (that is, the front end of diapire 230 or rear end).In addition, each gathering sill 240 is depressed in the diapire 230.The length of the length of preferred each gathering sill 240 and the side 230b of diapire 230 at least 25% corresponding that is to say, corresponding at least 25% of the width of diapire 230.If each gathering sill 240 be shorter in length than 25% of diapire 230 width, be subjected to along the time at lithium secondary battery perpendicular to the extruding of its longitudinal axis direction, then be difficult to guide effectively the deformation direction of shell 200, so shell 200 can not be crooked symmetrically around longitudinal axis.The width on preferred each gathering sill 240 top is narrower than 3mm.Because each gathering sill 240 has rectangular cross section, so the bottom width of each gathering sill 240 also is narrower than 3mm.Each gathering sill 240 is weakness (weakpoint) in the bottom of shell 200, so if the width of each gathering sill 240 is too wide, each gathering sill 240 may weaken the intensity of shell 200.For this reason, the width of each gathering sill 240 preferably is narrower than 3mm, more preferably is narrower than 1mm.In addition, the degree of depth of each gathering sill 240 is less than 25% of diapire 230 thickness.As mentioned above, because each gathering sill 240 is a weakness in the bottom of shell 200, so if each gathering sill 240 is too dark, then each gathering sill 240 will weaken the intensity of shell 200.For this reason, the degree of depth of each gathering sill 240 is preferably less than 25% of diapire 230 thickness, be more preferably less than diapire 230 thickness 10%.
Each gathering sill 240 with the respective side edge 230b of diapire 230 spaced a predetermined distance from and with the respective side edge 230b parallel alignment of diapire 230.The side 230b of preferred diapire 230 and the distance between the corresponding gathering sill 240 diapire 230 length 25% in.More preferably, the side 230b of diapire 230 and the distance between the corresponding gathering sill 240 diapire 230 length 10% in.If the distance between the side 230b of diapire 230 and the corresponding gathering sill 240 surpasses 25% of diapire 230 length, then when longitudinally pushing lithium secondary battery, shell 200 can not be out of shape symmetrically around the longitudinal axis of shell 200.
Translate into Fig. 3 now, Fig. 3 is the front view of the lithium secondary battery shell 300 of second embodiment of the invention.With reference to figure 3, the shell 300 of second embodiment of the invention comprises the cut type with predetermined length (notch-type) gathering sill 340 on the outer surface that is formed at diapire 330.In detail, each gathering sill 340 is for having the bar shaped of triangular cross section.In this second execution mode, except that each gathering sill 340 is triangular cross section rather than the rectangular cross section, each gathering sill 340 is identical with each gathering sill 240 shown in Fig. 2 A basically.If each gathering sill 340 has triangular cross section, then when shell 300 was subjected to vertically pushing, each gathering sill 340 was easy to distortion, so each gathering sill 340 can guide shell 300 distortion effectively.In addition, the marginal portion of each cut type gathering sill 340 is crooked, to improve the intensity of shell 300.Therefore, with the identical mode of first execution mode shown in Fig. 2 A, each gathering sill 340 extends out from the front end or the rear end of diapire 330, is depressed in simultaneously in the diapire 330.In addition, preferably, the length of each gathering sill 340 is corresponding at least 25% of diapire 330 width.The width on preferred each gathering sill 340 top is narrower than 3mm.More preferably, the width on each gathering sill 340 top is narrower than 1mm.Because each gathering sill 340 is a weakness in the bottom of shell 300, so if the width of each gathering sill 340 is too wide, then each gathering sill 340 will weaken the intensity of shell 300.In addition, the degree of depth of each gathering sill 340 is preferably less than 25% of diapire 330 thickness, more preferably, and less than 10% of diapire 330 thickness.
Corresponding (being nearest) side 330b parallel alignment of each gathering sill 340 and diapire 330.The side 330b of preferred diapire 330 and the distance between the corresponding gathering sill 340 diapire 330 length 25% in.More preferably, the side 330b of diapire 330 and the distance between the corresponding gathering sill 340 diapire 330 length 10% in.
Translate into Fig. 4 now, Fig. 4 is the front view of the lithium secondary battery shell 400 of third embodiment of the invention.The bar shaped gathering sill 440 that comprises the predetermined interior section place that is formed at diapire 430 with reference to the shell 400 of figure 4, the three execution modes with predetermined length.In detail, according to the 3rd execution mode, each gathering sill 440 is identical with each gathering sill 240 shown in Fig. 2 A basically, and just gathering sill 440 is formed on the inner surface of shell 400, rather than is formed at the outer surface of shell 400.Each gathering sill 440 extends towards another long sidewall 410 from the lower interior portion part of a long sidewall 410, and is depressed in the upper surface of diapire 430.In addition, preferably, the width of the length of each gathering sill 440 and diapire 430 at least 25% corresponding.The width on preferred each gathering sill 440 top is narrower than 3mm.More preferably, the width on each gathering sill 440 top is narrower than 1mm.In addition, the degree of depth of each gathering sill 440 is preferably less than 25% of the thickness of diapire 430, more preferably, and less than 10% of the thickness of diapire 430.The side 430b parallel alignment of each gathering sill 440 and diapire 430.The side 430b of preferred diapire 430 and the distance between the corresponding gathering sill 440 the length of diapire 430 25% within.More preferably, the side 430b of diapire 430 and the distance between the corresponding gathering sill 440 diapire 430 length 10% in.
Translate into Fig. 5 A and 5B now.Fig. 5 A is the perspective view of the lithium secondary battery shell 500 of four embodiment of the invention, and Fig. 5 B is the sectional view of shell 500 shown in Fig. 5 A that dissects along A-A line among Fig. 5 A.With reference to figure 5A and 5B, the shell 500 of the lithium secondary battery of four embodiment of the invention comprises first gathering sill 540 on the outer surface that is formed at diapire 530 and is formed at the reservations office of long sidewall 510 and second gathering sill 550 that extends in parallel along the longitudinal axis of shell 500.The shape of first gathering sill 540 shape with each gathering sill 240,340 shown in Fig. 2 A, 3 and 4 or 440 respectively is identical.Middle body at long sidewall 510 is formed with second gathering sill 550 parallel with the longitudinal axis of shell 500.That second gathering sill 550 can have is arc, rectangle or triangular cross-sectional shape and be made into the bar shaped with predetermined length.The shape of second gathering sill 550 is similar to the shape of each gathering sill 240,340 or 440.In addition, at least 50% of the height of the length of second gathering sill 550 and long sidewall 510 is corresponding.If the length of each gathering sill 550 is less than 50% of the height of long sidewall 510, then be subjected to being difficult to guide effectively along perpendicular to the extruding of its longitudinal axis direction the time deformation direction of shell 500 at lithium secondary battery.The width on preferred second gathering sill 550 tops is narrower than 3mm, more preferably, is narrower than 1mm.Because second gathering sill 550 is as the weak part on the long sidewall 510 of shell 500, so if the width of second gathering sill 550 is too wide, second gathering sill 550 will weaken the intensity of shell 500.In addition, if second gathering sill 550 has rectangle or triangular cross section, its marginal portion is crooked, therefore can improve the intensity of shell.The degree of depth of second gathering sill 550 is less than 25% of the thickness of long sidewall 510.More preferably, the degree of depth of second gathering sill 550 is less than 10% of long sidewall 510 thickness.As mentioned above, second gathering sill 550 is as the weak part on the long sidewall 510 of shell 500, so if second gathering sill 550 is too dark, second gathering sill 550 will weaken the intensity of shell 500.
Translate into Fig. 6 now, Fig. 6 is the perspective view of the lithium secondary battery shell 600 of fifth embodiment of the invention.With reference to figure 6, the shell 600 of fifth embodiment of the invention comprises long sidewall 610, short sidewall 620 and diapire 630.Short sidewall 620 is level and smooth curved surfaces, makes shell 600 for having the elliptical cylinder-shape structure of oval level cross-sectionn.The shell 600 of the 5th execution mode is identical to shell shown in Figure 5 with Fig. 2 A basically, and just the short sidewall 620 of shell 600 is level and smooth curved surfaces.That is to say that shell 600 is formed with basically identical first gathering sill 640 and second gathering sill 650 to those shells shown in Figure 5 with Fig. 2 A.Thereby, below will be no longer the shape and the position of first and second gathering sills 640 and 650 be described.
Shell of the present invention is suitable for lithium secondary battery shown in Figure 1.Certainly, the present invention specifically is not limited to the structure of the lithium secondary battery that is applied to those shells of the present invention.That is to say that shell of the present invention is applicable to the lithium secondary battery with other structure except that shown in Figure 1.
The working condition of the shell 600 of the 5th execution mode described when lithium secondary battery below that subtend is shown in Figure 7 applied extruding force.Fig. 7 is the bottom view of the operating state of shell 600 shown in Figure 6 under the extruding force effect.The deformation direction of shell when Fig. 7 shows shell 600 carried out vertical squeeze test.
With reference to figure 6 and 7, on the shell 600 of the lithium secondary battery of fifth embodiment of the invention comprises first gathering sill 640 that is formed on diapire 630 outer surfaces and is formed on a long sidewall 610 and its end portion be connected with first gathering sill 640 second gathering sill 650.Therefore, if the short sidewall 620 of shell 600 is subjected to the extruding of edge perpendicular to the direction of the longitudinal axis of shell 600, the shape of first gathering sill 640 deforms, and the deformation direction that guides shell 600 simultaneously is towards the long sidewall 610 that is connected with first gathering sill 640.Because first gathering sill 640 is weak parts for the diapire 630 of shell 600, so first gathering sill 640 at first deforms.In addition, because shell 600 is formed with second gathering sill 650, so shell 600 can deform along the longitudinal axis effectively because of the distortion of second gathering sill 650.Therefore, when shell 600 or the lithium secondary battery with shell 600 as shown in Figure 1 were subjected to vertically pushing, shell 600 or lithium secondary battery were around the longitudinal axis symmetric curvature of shell 600.Thereby the electrode assemblie that is contained in the shell 600 also centers on the longitudinal axis symmetric curvature of shell 600, thereby can avoid being short-circuited between the battery lead plate of electrode assemblie.
Translate into Fig. 8 A and 8B now, Fig. 8 A is the perspective view of shell 700 of the lithium secondary battery of sixth embodiment of the invention, and Fig. 8 B is the cross-sectional view of the shell 700 that dissects along B-B line among Fig. 8 A.With reference to figure 8A and 8b, the shell 700 of sixth embodiment of the invention is box-like, and it comprises long sidewall 710, short sidewall 720 and diapire 730.Box-shaped casing 700 can have various shape of cross sections, for example rectangle or ellipse.In addition, shell 700 is made by metal material.Preferred shell 700 is made by in light weight and pliable and tough aluminum or aluminum alloy.Certainly, the present invention is not specifically limited the material of shell 700.
Preferably make shell 700 by deep punch method, and long sidewall 710 and short sidewall 720 and diapire 730 whole formation.In detail, shell 700 is provided with the sidewall that long sidewall 710 and narrower short sidewall 720 by broad constitute.Long sidewall 710 each interval preset distances face with each other simultaneously, form the front surface and the rear surface of shell 700 thus.In addition, short sidewall 720 each interval preset distances face with each other simultaneously, form two side surfaces of shell 700 thus.If shell 700 is essentially rectangular box-like, long sidewall 710 and short sidewall 720 have flat shape.Certainly, if shell 700 is elliptical cylinder-shape rather than rectangle box-like, short sidewall 720 is level and smooth curved surfaces, so do not have the boundary line between long sidewall 710 and short sidewall 720.In addition, form upper opening 700a on the top relative of shell 700 with diapire 730.
Diapire 730 forms the bottom of shell 700, and the embossing part 740 that is provided with towards shell 700 interior section projections is gone up on preferred surface thereon.In detail, embossing part 740 is for having the bar shaped or the rectangle cylindricality of predetermined length, and the vertical cross-section of each embossing part 740 is essentially circle, triangle or rectangle.Certainly, the present invention is not specifically limited the shape of each embossing part 740, as long as each embossing part 740 is from the predetermined portions of the diapire 730 interior section projection towards shell 700.In addition, preferably at least 50% of the length of the length of each embossing part 740 and each side 730 corresponding.If the length of each embossing part 740 is less than 50% of each side 730b length, when lithium secondary battery was subjected to vertically pushing, the diapire 730 of shell 700 did not bend outwards.The side 730b of each embossing part 740 and diapire 730 is preset distance at interval, and with the side 730b parallel alignment of diapire 730.The side 730b of preferred diapire 730 and the distance between the corresponding embossing part 740 vertical side 730a length of diapire 730 25% in.More preferably, the distance between the side 730b of diapire 730 and the corresponding embossing part 740 vertical side 730a length of diapire 730 10% within.If the distance between the side 730b of diapire 730 and the embossing part 740 surpass diapire 730 vertical side 730a length 25%, when lithium secondary battery being applied vertical extruding the diapire 730 of shell 700 can be partly or wholly towards the interior section bending of shell 700.
Each embossing part 740 is towards the height of the interior section projection 0.1mm to 0.5mm of shell 700.The height of preferred each embossing part 740 is greater than 50% of diapire 730 thickness.That is to say that the distance (a) between the upper end of the upper surface of diapire 730 and embossing part 740 is equal to or greater than 50% of diapire 730 thickness.Usually, the long sidewall 710 of shell 700 and the thickness of short sidewall 720 are in the scope of 0.2mm to 0.4mm, and the thickness of the diapire 730 of shell 700 is in the scope of 0.2mm to 0.7mm.Therefore, when the thickness of the diapire 730 of shell 700 was about 0.5mm, the height of each embossing part 740 was about 0.25mm to 0.5mm.If the height of each embossing part 740 is during less than 0.1mm, the effect of each embossing part 740 significantly reduces, and when the result was subjected to vertically pushing at lithium secondary battery, the diapire 730 of shell 700 only slightly bent outwards.Otherwise if the height of each embossing part 740 is too high, each embossing part 740 may cause damage to the electrode assemblie (not shown) that is contained in the shell 700.For this reason, the height of each embossing part 740 is preferably less than 0.5mm.
Now translate into Fig. 9 A and 9B, Fig. 9 A is the perspective view of the lithium secondary battery shell 800 of seventh embodiment of the invention, and Fig. 9 B is the cross-sectional view of the shell 800 that dissects along C-C line among Fig. 9 A.With reference to figure 9A and 9B, the shell 800 of seventh embodiment of the invention comprises sidewall and the opening 800a that is located at the shell upper place relative with diapire 830, and sidewall is made up of the long sidewall 810 of broad and narrower short sidewall 820.Embossing part 840 is formed on the diapire 830 of shell simultaneously the interior section projection towards shell 800.Embossing part 840 can be circle, polygon taper shape or hemisphere.In addition, a plurality of embossing parts 840 alinement and parallel each other with the side 830b of diapire 830.Certainly, the present invention is not specifically limited the shape of embossing part 840, as long as the interior section projection of embossing part 840 from the predetermined portions of diapire 830 towards shell 800.
Similar to the embossing part 740 of the shell 700 shown in Fig. 8 A, the embossing part 840 shown in Fig. 9 A and the 9B is towards the height of the interior section projection 0.1mm to 0.5mm of shell 800.The height (0.1mm to 0.5mm) of preferred embossing part 840 is greater than 50% of diapire 830 thickness.That is to say, the distance (a) between the upper end of the upper surface of diapire 830 and embossing part 840 be equal to or greater than diapire 830 thickness 50%.
Translate into Figure 10 A and 10B now, Figure 10 A is the perspective view of the lithium secondary battery shell 900 of eighth embodiment of the invention, and Figure 10 B is the cross-sectional view of the shell 900 that dissects along D-D line among Figure 10 A.With reference to figure 10A and 10B, the long sidewall 910 that the shell 900 of eighth embodiment of the invention comprises broad and narrower short sidewall 920 and be positioned at the opening 900a at the place, top of the shell 900 relative with diapire 930.Embossing part 940 is formed at the diapire 930 of shell 900 and towards the interior section projection of shell 900.In detail, embossing part 940 is for having the closed annular of preset width and being formed on the diapire 930 of shell 900, simultaneously with the side 930b of diapire 930 and vertical side 930a preset distance at interval.Thereby when diapire 930 was rectangle or ellipse, the embossing part 930 with preset width formed rectangle closed annular or oval closed annular along diapire 930.Distance between preferred embossing part 940 zones of living in and the nearest side 930b be not more than vertical side 930a length 25%, and the distance between zone of living in and the nearest vertical side 930a be not more than side 930b length 25%.More preferably, the distance between embossing part 940 zones of living in and the nearest side 930b is not more than 10% of vertical side 930a length, and the distance between zone of living in and the nearest vertical side 930a is not more than 10% of side 930b length.If the distance between embossing part 940 and the nearest side 930b surpasses at 25% o'clock of vertical side 930a length, then embossing part 940 is formed on the middle section of diapire 930, so when shell 900 was applied vertical extruding, diapire 930 can not bend outwards effectively.
As the execution mode of reference front was described, embossing part 940 was towards the height of the interior section projection 0.1mm to 0.5mm of shell 900.The height (0.1mm to 0.5mm) of preferred embossing part 940 is greater than 50% of diapire 930 thickness.In addition, owing to embossing part 940 is alignd, and be parallel to vertical side 930a of diapire 930 on the diapire 930 of shell 900, so embossing part 940 can be strengthened the intensity of diapire 930.
In addition, for the shell shown in Figure 10 A and the 10B 900, owing to embossing part 940 is alignd, and be parallel to vertical side 930a of diapire 930 on the diapire 930 of shell 900, embossing part 940 can be strengthened the intensity of diapire 930 along the direction of long side 910.So when carrying out vertical squeeze test by the extruding force that applies regulation to shell 900 on shell 900, the distortion of shell 900 can be minimum, therefore the fail safe that can improve lithium secondary battery.
Translate into Figure 11 now, Figure 11 is the perspective view of the lithium secondary battery shell 1000 of ninth embodiment of the invention.In Figure 11, the shell 1000 of ninth embodiment of the invention comprises long sidewall 1010, short sidewall 1020 and diapire 1030.Short sidewall 1020 is curved surfaces, causes shell 1000 to have the elliptical cylinder-shape structure of oval level cross-sectionn.Therefore, different with the shell shown in Fig. 8 A or the 9A, because short sidewall 1020 bendings do not form the boundary line between long sidewall 1010 and the short sidewall 1020 in shell 1000.Upper end at shell 1000 forms upper opening 1000a.In addition, on the diapire 1030 of shell 1000, form embossing part 1040, and make it towards shell 1000 interior section projections.Similar with the embossing part shown in Fig. 8 A, each embossing part 1040 is for having the conical structure of predetermined length.In addition, each embossing part 1040 has triangular cross section basically.Moreover the respective side edge 1030b of each embossing part 1040 and diapire 1030 is preset distance at interval.The shape of each embossing part 1040 of present embodiment is identical with the shape of the embossing part shown in Fig. 8 A or the 9A, so repeat no more.
Shell of the present invention is suitable for lithium secondary battery shown in Figure 1.Certainly, for shell of the present invention, the present invention specifically is not limited to the structure of lithium secondary battery shown in Figure 1.That is to say that shell of the present invention also is applicable to other lithium secondary battery with other structure.
Below in conjunction with Figure 12 the working condition of the shell shown in Fig. 8 A and the 8B 700 in the lithium secondary battery is described.With reference to Figure 12, Figure 12 is the sectional view of the deformation direction of shell 700 under vertical extruding in the lithium secondary battery of sixth embodiment of the invention.With reference to figure 8A and 8B, shell 700 comprises the embossing part 740 that is formed on the diapire 730.Therefore, when shell 700 or the lithium secondary battery with the shell 700 shown in Fig. 8 A and the 8B shown in Figure 1 crooked or because of the vertical extruding that is applied to lithium secondary battery centers on its longitudinal axis when being extruded perpendicular to the longitudinal axis direction, the diapire 730 of shell 700 is outwardly-bent, rather than curve inwardly (referring to the arrow Xa among Figure 12).Therefore, the diapire 730 of shell 700 can be avoided thus being short-circuited between the battery lead plate of electrode assemblie, and can improve the fail safe of lithium secondary battery not to being contained in the bottom application of force of the electrode assemblie (not shown) in the shell 700.
Though describe the present invention with reference to lithium secondary battery, shell of the present invention also is applicable to other secondary cell.
As mentioned above, according to the present invention, on the diapire of lithium secondary battery shell and sidewall, be formed with gathering sill, make along the time perpendicular to the direction of longitudinal axis extruding lithium secondary battery, shell is crooked symmetrically around its longitudinal axis, so can avoid between battery lead plate, being short-circuited, and can improve the fail safe of lithium secondary battery.
In addition,, on the diapire of lithium secondary battery shell, form embossing part, make that the diapire of shell bends outwards along perpendicular to longitudinal axis direction extruding lithium secondary battery the time towards shell interior section projection according to the present invention.When therefore pushing, diapire can be avoided being short-circuited between the battery lead plate not to being contained in the bottom application of force of the electrode assemblie in the shell thus.
Though preferred implementation of the present invention is illustrated for illustrative purposes, those skilled in the art are to be understood that under the prerequisite of design of the present invention that does not exceed the claims statement and scope, can carry out various remodeling, interpolation and replacement.
Claims (44)
1. shell that is used for battery comprises:
The diapire that is oppositely arranged with upper opening, wherein, two short side places at diapire described in the diapire of described shell are provided with first gathering sill, this first gathering sill is along perpendicular to a longitudinal direction that is parallel to the long side of described diapire, the short side that is parallel to described diapire is extended, described shell hold electrodes assembly, this electrode assemblie comprise positive electrode plate, negative electrode plate and are located at dividing plate between the negative electrodes plate that described shell also inserts described electrode assemblie in the described shell through described upper opening.
2. shell according to claim 1, wherein, described shell also comprises a pair of long sidewall and a pair of short sidewall that is set between described diapire and the upper opening, described shell is box-like.
3. shell according to claim 1, wherein, described shell also comprises a pair of long sidewall and a pair of short sidewall that is set between described diapire and the upper opening; The short sidewall of described shell is the curved surface shape, and described shell has oval cross section.
4. shell according to claim 1, wherein, each first gathering sill is bar shaped.
5. shell according to claim 4, wherein, each first gathering sill has a kind of cross section of choosing in the group of being made up of arc, rectangle or triangle.
6. shell according to claim 4, wherein, the length of each first gathering sill is at least 25% of described diapire width.
7. shell according to claim 4, wherein, the width of each first gathering sill is narrower than 3mm.
8. shell according to claim 7, wherein, the width of each first gathering sill is narrower than 1mm.
9. shell according to claim 4, wherein, the degree of depth of each first gathering sill is less than 25% of described bottom wall thickness.
10. shell according to claim 9, wherein, the degree of depth of each first gathering sill is less than 10% of described bottom wall thickness.
11. shell according to claim 1, wherein, each first gathering sill is set on the outer surface of described outer shell bottom wall.
12. shell according to claim 11, wherein, each first gathering sill extends from one of front-end and back-end of described outer shell bottom wall, and is depressed in the outer surface of described outer shell bottom wall.
13. shell according to claim 2, wherein, each first gathering sill is set on the inner surface of described shell.
14. shell according to claim 13, wherein, one of each first gathering sill long sidewall along described diapire from described shell extends.
15. shell according to claim 1, wherein, the distance between the hithermost side of each first gathering sill and described diapire is not more than 25% of described diapire length.
16. shell according to claim 15, wherein, the distance between the hithermost side of each first gathering sill and described diapire described diapire length 10% within.
17. shell according to claim 2 wherein, also comprises second gathering sill of the central portion office that longitudinally is set at one of described long sidewall.
18. shell according to claim 17, wherein, described second gathering sill is bar shaped.
19. shell according to claim 17, wherein, described second gathering sill has a kind of cross section of choosing from the group of being made up of arc, rectangle or triangle.
20. shell according to claim 17, wherein, the length of described second gathering sill be provided with described second gathering sill described long sidewall height at least 50%.
21. shell according to claim 17, wherein, the width of described second gathering sill is narrower than 3mm.
22. shell according to claim 21, wherein, the width of described second gathering sill is narrower than 1mm.
23. shell according to claim 17, wherein, the degree of depth of described second gathering sill is less than 25% of the thickness of the described long sidewall that is provided with described second gathering sill.
24. shell according to claim 23, wherein, the degree of depth of described second gathering sill is less than 10% of the thickness of the described long sidewall that is provided with described second gathering sill.
25. a lithium secondary battery comprises:
Comprise positive electrode plate, negative electrode plate and be set at the electrode assemblie of the dividing plate between the described negative electrodes plate; And
The shell that comprises the diapire that is oppositely arranged with upper opening, wherein, two short side places at diapire described in the diapire of described shell are provided with first gathering sill, this first gathering sill is along perpendicular to long side vertical who is parallel to described diapire, the short side that is parallel to described diapire is extended, described shell hold electrodes assembly, this shell also inserts described electrode assemblie in the described shell through described upper opening, and described electrode assemblie is set in the described shell.
26. lithium secondary battery according to claim 25, wherein, the width of each first gathering sill is narrower than 3mm.
27. lithium secondary battery according to claim 25 wherein, also comprises:
Be arranged at the long sidewall between described diapire and the upper opening, and
Be arranged at second gathering sill in the described long sidewall, this gathering sill longitudinally is arranged on the middle body of the long sidewall of described shell.
28. lithium secondary battery according to claim 27, wherein, the width of described second gathering sill is narrower than 3mm.
29. a shell that is used for battery comprises:
The diapire that is oppositely arranged with upper opening, wherein, two short side places are provided with the embossing part at diapire described in the diapire of described shell, each embossing part is towards described enclosure part projection, described shell hold electrodes assembly, this electrode assemblie comprises positive electrode plate, negative electrode plate and is located at dividing plate between the negative electrodes plate that described shell also inserts described electrode assemblie in the described shell through described upper opening.
30. shell according to claim 29, wherein, described shell also comprises a pair of long sidewall and a pair of short sidewall that is arranged between described diapire and the upper opening, and described shell is box-like.
31. shell according to claim 29, wherein, described shell also comprises a pair of long sidewall and a pair of short sidewall that is arranged between described diapire and the upper opening; The short sidewall of described shell is the curved surface shape, and described shell has oval cross section.
32. shell according to claim 29, wherein, each embossing partly has a kind of shape of choosing from the group of being made up of bar shaped, taper shape and hemisphere.
33. shell according to claim 32, wherein, each embossing part with the hithermost side of described diapire spaced apart and with the hithermost side parallel alignment of described diapire.
34. shell according to claim 33, wherein, the distance between the hithermost side of described each embossing part and described diapire is not more than 25% of described diapire length.
35. shell according to claim 34, wherein, the distance between the hithermost side of described each embossing part and described diapire is not more than 10% of described diapire length.
36. shell according to claim 33, wherein, each embossing partly is set in 50% the zone corresponding to described diapire side edge length at least.
37. shell according to claim 29, wherein, described embossing part is set to be in the single closed loop shape in the described diapire together.
38. according to the described shell of claim 37, wherein, described embossing part is set to a kind of shape in rectangular ring or the elliptical annular together.
39. according to the described shell of claim 37, wherein, distance between the hithermost side of residing zone of described embossing part and described diapire is not more than 25% of the vertical side length of described diapire, and the distance between this zone and the hithermost vertical side is not more than 25% of described diapire side edge length.
40. according to the described shell of claim 39, wherein, distance between the hithermost side of residing zone of described embossing part and described diapire is not more than 10% of the vertical side length of described diapire, and the distance between this zone and the hithermost vertical side is not more than 10% of described diapire side edge length.
41. shell according to claim 29, wherein, the height of each embossing part projection is between 0.1 to 0.5mm.
42. according to the described shell of claim 41, wherein, the height of each embossing part is greater than the thickness of described diapire.
43. a lithium secondary battery comprises:
Electrode assemblie, it has positive electrode plate, negative electrode plate and is arranged at dividing plate between the negative electrodes plate; And
The shell that comprises the diapire that is oppositely arranged with upper opening, wherein, two of diapire short side places are provided with the embossing part in the diapire of described shell, each embossing part is towards described enclosure part projection, described shell holds described electrode assemblie, and described shell also inserts described electrode assemblie in the described shell through described upper opening.
44. according to the described lithium secondary battery of claim 43, wherein, described embossing partly has a kind of shape of choosing in the group of being made up of bar shaped, taper shape and hemisphere.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020050024670A KR100670493B1 (en) | 2005-03-24 | 2005-03-24 | Can for Lithium Secondary Battery and Lithium Secondary Battery using the Same |
| KR24670/05 | 2005-03-24 | ||
| KR34228/05 | 2005-04-25 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1848481A CN1848481A (en) | 2006-10-18 |
| CN100530763C true CN100530763C (en) | 2009-08-19 |
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ID=37077947
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2006100820684A Expired - Fee Related CN100530763C (en) | 2005-03-24 | 2006-03-24 | Housing and lithium secondary battery using same |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100670493B1 (en) |
| CN (1) | CN100530763C (en) |
Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101192090B1 (en) | 2008-06-09 | 2013-11-27 | 삼성에스디아이 주식회사 | Lithium Secondary Battery |
| KR100988694B1 (en) | 2009-06-16 | 2010-10-18 | 삼성에스디아이 주식회사 | Rechargeable battery |
| US8920964B2 (en) | 2010-05-03 | 2014-12-30 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| KR101693292B1 (en) * | 2013-01-21 | 2017-01-05 | 삼성에스디아이 주식회사 | Rechargeable battery |
| US9583741B2 (en) * | 2013-07-05 | 2017-02-28 | Samsung Sdi Co., Ltd. | Secondary battery |
| KR102195732B1 (en) * | 2014-02-12 | 2020-12-28 | 삼성에스디아이 주식회사 | Battery pack |
| KR102570969B1 (en) * | 2018-02-01 | 2023-08-25 | 삼성에스디아이 주식회사 | Cylindrical lithium ion secondary battery |
Family Cites Families (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS63250049A (en) * | 1987-04-03 | 1988-10-17 | Matsushita Electric Ind Co Ltd | Sealed type lead storage battery |
| KR970054691A (en) * | 1995-12-22 | 1997-07-31 | 배순훈 | Lithium battery case |
| JPH11267779A (en) | 1998-03-20 | 1999-10-05 | Konno Kogyosho:Kk | Production of blind container |
-
2005
- 2005-03-24 KR KR1020050024670A patent/KR100670493B1/en not_active IP Right Cessation
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2006
- 2006-03-24 CN CNB2006100820684A patent/CN100530763C/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| KR20060102753A (en) | 2006-09-28 |
| KR100670493B1 (en) | 2007-01-16 |
| CN1848481A (en) | 2006-10-18 |
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