CN100563057C - Cylindrical lithium secondary battery - Google Patents
Cylindrical lithium secondary battery Download PDFInfo
- Publication number
- CN100563057C CN100563057C CNB2006101060467A CN200610106046A CN100563057C CN 100563057 C CN100563057 C CN 100563057C CN B2006101060467 A CNB2006101060467 A CN B2006101060467A CN 200610106046 A CN200610106046 A CN 200610106046A CN 100563057 C CN100563057 C CN 100563057C
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- chipware
- sweep
- secondary battery
- lithium secondary
- cylindrical lithium
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- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 title claims abstract description 48
- 229910052744 lithium Inorganic materials 0.000 title claims abstract description 48
- 230000000712 assembly Effects 0.000 claims abstract description 18
- 238000000429 assembly Methods 0.000 claims abstract description 18
- 238000005452 bending Methods 0.000 claims abstract description 15
- 230000002093 peripheral effect Effects 0.000 claims abstract description 6
- 239000007769 metal material Substances 0.000 claims description 2
- 238000007789 sealing Methods 0.000 claims description 2
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 15
- 229910001416 lithium ion Inorganic materials 0.000 description 15
- 239000008151 electrolyte solution Substances 0.000 description 13
- 230000015572 biosynthetic process Effects 0.000 description 11
- 239000000463 material Substances 0.000 description 5
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 4
- 239000011149 active material Substances 0.000 description 4
- 229920000642 polymer Polymers 0.000 description 4
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 3
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000003487 electrochemical reaction Methods 0.000 description 2
- 238000005868 electrolysis reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 229910052742 iron Inorganic materials 0.000 description 2
- 229910003002 lithium salt Inorganic materials 0.000 description 2
- 159000000002 lithium salts Chemical class 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 239000003960 organic solvent Substances 0.000 description 2
- 238000005096 rolling process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- 239000004411 aluminium Substances 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000003780 insertion Methods 0.000 description 1
- 230000037431 insertion Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007773 negative electrode material Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 239000007774 positive electrode material Substances 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
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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
- 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
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
-
- 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
- H01M10/058—Construction or manufacture
- H01M10/0587—Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
-
- 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
- H01M50/107—Primary casings; Jackets or wrappings characterised by their shape or physical structure having curved cross-section, e.g. round or elliptic
-
- 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
-
- 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
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of cylindrical lithium secondary battery, it comprise have first battery lead plate, second battery lead plate and be arranged on the electrode assemblie of the dividing plate between first and second battery lead plates, electrode assemblie is wound into spirality and has central space in the coiling center; Insert the chipware of electrode assemblie central space; Housing with space of hold electrodes assembly; And be connected cap assemblies with housing top with seal casinghousing.Chipware is formed tubular, it has the axial clearance, this gap is divided into main part and a left side and right-hand end part with chipware, the phantom arc of extending from the main part external peripheral surface of chipware limits imaginary circumference, a left side and right-hand end partly are positioned at the inboard of imaginary circumference, and they comprise a pair of curve inwardly and with respect to second sweep of the rotation direction bending of symmetrically arranged first sweep in gap and a pair of direction of rotation that curves inwardly along first sweep.Whereby, this cylindrical lithium secondary battery has improved stability.
Description
Technical field
The present invention relates to a kind of cylindrical lithium ion secondary battery, more particularly, relate to a kind of cylindrical lithium ion secondary battery that has improved stability with respect to external pressure.
The application requires to enjoy in korean patent application 2005-35301 number the priority of submitting in Korea S Department of Intellectual Property on April 27th, 2005, and the disclosed content of this application is all drawn and done reference of the present invention.
Background technology
Generally speaking, cylindrical lithium ion secondary battery comprises the electrode assemblie that is wound into cylindrical shape basically, the cylindrical housings that is connected with electrode assemblie, injects enclosure interior and is connected with the electrolytic solution that allows lithium ion to move, with a side of housing and prevents electrolytic solution leakage and the cap assemblies that prevents that electrode assemblie from separating.
Typical cylindrical lithium ion secondary battery has the capacity of about 2000～2400mA, and therefore mainly being used in needs for example, to be used in notebook PCs, digital camera or the camcorders in the powerful electronic installation.For example, the cylindrical lithium ion secondary battery of the requirement of being connected or being connected in parallel can comprise protective circuit and can be assembled in the rigid package by given shape, to be used as the power supply that is connected with electronic installation.
Can make cylindrical lithium ion secondary battery by following method.
At first, will comprise active material negative electrode plate and comprise that the positive electrode plate of dividing plate and active material stacks together.Then the one end is connected with the clavate wireline reel, roughly is wound into cylindrically, form electrode assemblie thus.After this, electrode assemblie is inserted cylindrical housings, electrolytic solution is injected housing, cap assemblies is welded on the top of cylindrical housings, form cylindrical substantially lithium rechargeable battery thus.
Recently, be the center of the chipware 100 insertion electrode assemblies of clavate with as shown in Figure 1 basic, so that electrode assemblie does not deform when cylindrical lithium ion secondary battery carried out charge or discharge.Chipware 100 usually by the material webs that is initially plate shape around forming, can form cross section whereby and be circular tubular in shape.Longitudinally cut its part again.
Yet, in described cylindrical lithium ion secondary battery,, may cause chipware 100 to move if be subjected to colliding as the outside of falling and so on.Moving of chipware 100 will impact the cap assemblies that is positioned at chipware 100 tops.Particularly, when the safety belt of chipware 100 and cap assemblies collided, safety belt may overturn or damage.If safety belt upset or damage will have a strong impact on the fail safe of lithium secondary battery.
In addition, when chipware 100 rotated, the lower end of electrode assemblie may contact with chipware 100, so may be short-circuited in the lower end of electrode assemblie.
Moreover, when chipware 100 is out of shape or is impaired, the dividing plate of electrode assemblie is damaged, the damage of dividing plate may cause short circuit between positive electrode plate and the negative electrode plate, and this may cause more serious damage or make the cylindrical lithium ion secondary battery blast.Exactly, when applying external pressure, externally pressure concentrates part chipware 100 to be out of shape along specific direction.Electrode assemblie is subjected to the pressure along specific direction, is short-circuited between battery lead plate thus.
Summary of the invention
The purpose of this invention is to provide a kind of cylindrical lithium ion secondary battery that has the security performance of improvement with respect to external pressure.
According to an aspect of the present invention, a kind of cylindrical lithium secondary battery is provided, comprise: have first battery lead plate, second battery lead plate and be arranged on first battery lead plate and second battery lead plate between the electrode assemblie of dividing plate, this electrode assemblie is wound into spirality, and has specific central space in the coiling center; Be inserted into the chipware of electrode assemblie central space; Housing with space of hold electrodes assembly; And partly be connected cap assemblies with seal casinghousing with the housing upper, open end, and wherein, chipware is formed has the tubular of axial clearance, and it is divided into main part, a left side and right-hand end part by a pair of with respect to symmetrically arranged first sweep in described gap.
According to a further aspect of the invention, provide a kind of cylindrical lithium secondary battery, comprising: for example as electrode assemblie for jello volume type (jelly-roll type) electrode assemblie and so on; Be formed the have vertical cutting groove tubular chipware of (cut groove), this chipware is included at least one recess that longitudinally forms on the tubular member inside circumferential surface; Housing with space of hold electrodes assembly; And partly be connected cap assemblies with seal casinghousing with the upper opening of housing.
According to an aspect of the present invention, can form two or four recesses symmetrically, when forming four recesses, connect each imaginary line that adjoins recess and can form trapezoidal with respect to described cutting groove.
According to a further aspect of the invention, provide a kind of cylindrical lithium secondary battery, comprising: for example be the electrode assemblie of jello volume type electrode assemblie and so on; Be formed the tubular chipware with axial clearance, it is divided into main part, a left side and right-hand end part by a pair of with respect to symmetrically arranged first sweep in described gap, and chipware is inserted in the central space of battery component; Housing with space of hold electrodes assembly; And be connected cap assemblies with top, the opening portion of housing with seal casinghousing, wherein, the phantom arc of extending from the main part of chipware forms imaginary circumference, by means of first sweep, a left side and right-hand end partly are positioned at imaginary inside circumference, and overlapping respectively by a pair of second sweep.
According to an aspect of the present invention, second sweep can be along the rotation direction bending identical or opposite with the rotation direction of first sweep, and the edge by the second sweep bending can be crooked once more along the rotation direction identical or opposite with the rotation direction of second sweep by the 3rd sweep.
According to an aspect of the present invention, the edge of a left side and right-hand end part is positioned on the phantom arc of the outer surface extension of main part, the phantom arc that extends internally from each second sweep of a left side and right-hand end part is by the axis of chipware, and relative to each other formation is equal to or less than 120 ° angle.
According to a further aspect of the invention, provide a kind of cylindrical lithium secondary battery, comprising: for example be the electrode assemblie of jello volume type electrode assemblie and so on; Be formed in mid portion and have the tubular chipware of vertical slit; The housing that has the space of hold electrodes assembly and have the upper opening part; And partly be connected cap assemblies with seal casinghousing with the upper opening of housing.
According to an aspect of the present invention, chipware can be made by metal material, can make the diameter of the upper and lower diameter of chipware less than core.The height of chipware is approximately 90% to 110% of electrode assemblie height.
According to a further aspect of the invention, the chipware that can insert the electrode assemblie central space of cylindrical lithium secondary battery can be for tubular, this chipware has the gap that longitudinally chipware is divided into main part, a left side and right-hand end part, and wherein the phantom arc of extending from the outer surface of the main part of chipware limits an imaginary circumference; A left side and right-hand end partly are positioned at the inboard of imaginary circumference and comprise and a pair ofly being symmetrical arranged and second sweep of aduncate first sweep and a pair of edge and the rotation direction bending of the direction of rotation that curves inwardly of first sweep with respect to described gap.
According to a further aspect of the invention, the chipware that can insert the central space of cylindrical lithium secondary battery electrode assemblie is tubular, this chipware longitudinally has the gap that chipware is divided into main part, a left side and right-hand end part, wherein, the phantom arc of extending from the outer surface of the main part of chipware limits an imaginary circumference; A left side and right-hand end partly are positioned at the inboard of imaginary circumference and comprise and a pair ofly being symmetrical arranged and second sweep of the rotation direction bending that aduncate first sweep and a pair of edge are identical with the rotation direction of first sweep with respect to crack openings.
According to a further aspect of the invention, the chipware that can insert the electrode assemblie central space of cylindrical lithium secondary battery is tubular, and it has vertical cutting groove and comprises from the outstanding jut of the pipe end section of chipware.
According to a further aspect of the invention, the chipware that can insert the electrode assemblie central space of cylindrical lithium secondary battery is tubular, and it has vertical cutting groove and is included at least one recess that longitudinally forms on the inner surface of chipware.
According to a further aspect of the invention, the chipware that can insert in the electrode assemblie central space of cylindrical lithium secondary battery is tubular, it has first end section, second end section and mid portion, and wherein, the diameter at place, the first end section and second end section of chipware is less than the diameter of central part office; Wherein, the middle part has vertical slit; Slit does not extend in first end section or the second end section.
The part of others of the present invention and/or advantage will be illustrated in the following description, and a part will draw from specification, perhaps take a hint by enforcement of the present invention.
Description of drawings
Below in conjunction with accompanying drawing some embodiments of the present invention are described, will be clearer by these advantages of describing these and/or others of the present invention, more apparent.
Fig. 1 is the perspective view of traditional chipware;
Fig. 2 A is the perspective view of the cylindrical lithium secondary battery of an embodiment of the present invention;
Fig. 2 B is the cross-sectional view that dissects along A-A line among Fig. 2 A;
Fig. 2 C is the cross-sectional view that dissects along B-B line among Fig. 2 A;
Fig. 3 A is the plane graph of chipware plate of the cylindrical lithium secondary battery of an embodiment of the present invention;
Fig. 3 B is the perspective view of chipware of the cylindrical lithium secondary battery of the execution mode shown in Fig. 3 A;
Fig. 3 C is the cross-sectional view that dissects along C-C line among Fig. 3 B;
Fig. 4 A is the plane graph of chipware plate of the cylindrical lithium secondary battery of another execution mode of the present invention;
Fig. 4 B is the perspective view of chipware of the cylindrical lithium secondary battery of the execution mode shown in Fig. 4 A.
Fig. 4 C is the cross-sectional view that dissects along D-D line among Fig. 4 B;
Fig. 5 A is the vertical cross section of the cylindrical lithium secondary battery of the another execution mode of the present invention;
Fig. 5 B is the horizontal sectional drawing of the cylindrical lithium secondary battery of the execution mode shown in Fig. 5 A;
Fig. 6 A and 6B are the perspective views of chipware of the cylindrical lithium secondary battery of the some other execution mode of the present invention;
Fig. 7 is the present invention's perspective view of an execution mode again.
Embodiment
To describe some embodiments of the present invention in detail now, some examples wherein have been shown in the accompanying drawing, Reference numeral identical in whole accompanying drawings is represented identical parts.In order to explain the present invention, these execution modes are described below with reference to the accompanying drawings.
Fig. 2 A is the perspective view of the cylindrical lithium secondary battery of an embodiment of the present invention.Fig. 2 B is the cross-sectional view that dissects along A-A line among Fig. 2 A.Fig. 2 C is the cross-sectional view that dissects along B-B line among Fig. 2 A.
With reference to figure 2A to 2C, cylindrical lithium ion secondary battery 200 be included in the electrode assemblie 300 that produces voltage difference in the charge, hold electrodes assembly 300 cylindrical housings 400, be assemblied in the top of cylindrical housings 400 and prevent the cap assemblies 500 that electrode assemblie 300 separates and the chipware 600 that is positioned at the central space place of electrode assemblie 300.
In cylindrical housings 400, cylindrical surface 410 limits the particular space with special diameter.Form the lower space of basal surface 420 with closed circular cylindrical surface 410 in the bottom of cylindrical surface 410, therefore the opened upper end of cylindrical surface 410 can insert electrode assemblie 300.Second electrode contact 325 of first electrode contact 315 of first battery lead plate 310 or second battery lead plate 320 can be combined in the center of the basal surface 420 of cylindrical housings 400, so cylindrical housings 400 itself works to extend first battery lead plate 310 or second battery lead plate 320.For instance, second electrode contact 325 can be combined in the center of the basal surface 420 of cylindrical housings 400, make cylindrical housings play the part negative electrode.Cylindrical housings 400 is made by the alloy of aluminium (Al), iron and steel (Fe) or Al and Fe usually.And, on the top of cylindrical housings 400, with crimping portion 430 towards a direction bending with the extrusion cap assemblies 500, bead portion 440 inwardly concaves, with from the bottom to top squeeze cap assemblies 500.
Chipware 600 is inserted the middle body of winding-typed electrode assembly 300.Chipware 600 prevents that winding-typed electrode assembly 300 from unclamping and becoming flexible, and can also prevent that winding-typed electrode assembly 300 is out of shape because of external pressure.
Chipware 600 is by forming metallic plate base volume coiled tubulose.In addition, along the vertical formation cutting groove or the crack mouth 630 of chipware 600.The two side ends of the cutting groove 630 of chipware 600 is all towards interior curve, and its two side ends is crooked once more, makes the relative chipware in its edge 600 towards the outside.
The diameter of preferred chipware 600 is little at the diameter of middle body at first and second tube end offices ratio, and is also nonessential certainly like this.In other words, chipware 600 can be tapered at first pipe end and the second pipe end place.
Although do not illustrate,, make lithium ion between electrode, to move can electrolytic solution is injected in the cylindrical housings 400.During charge/discharge, electrolytic solution works to move the medium that lithium (Li) ion that electrochemical reaction produces takes place in the positive electrode of inside battery and negative electrode.Electrolytic solution can be non-water organic electrolysis solution, and it is the mixture of highly purified lithium salts and organic solvent.In addition, electrolytic solution can be to use the polymer of polymer dielectric, and certainly, the electrolytic solution type of material is not limited thereto.
The plane graph of Fig. 3 A shows the chipware plate of the cylindrical lithium secondary battery of an embodiment of the present invention.Fig. 3 B is the perspective view of chipware of the cylindrical lithium secondary battery of an embodiment of the present invention.Fig. 3 C is the cross-sectional view that dissects along C-C line among Fig. 3 B.
At first, with reference to figure 3A, the chipware plate 600 that the chipware 600 of cylindrical lithium secondary battery 200 is made by metallic plate ' form.
A pair of first line 610 of chipware plate 600 ' comprise in its left and right sides ', a pair of second line 620 ' and a pair of the three-way 640 ', when along chipware plate 600 ' vertical formation chipware 600 time, they are as sweep.
Chipware plate 600 ' by first line 610 ' a be divided into left side and right- hand end part 611 and 615 and main part 613, the second lines 620 ' be positioned on left and right- hand end part 611 and 615.
The three-way 640 ' with respect to second line 620 ' the be positioned at outside of a left side and right- hand end part 611 and 615.
With reference to figure 3B and 3C, by the chipware plate 600 shown in coiling Fig. 3 A ' formation cylindrical lithium secondary battery 200.
It is tubular that chipware 600 is substantially.In addition, along the vertical formation cutting groove or the gap 630 of chipware 600.
By along be positioned at chipware plate 600 ' a left side and a pair of first sweep 610 of first line 610 ' bending on right side, that is to say, relative gap 630 symmetries, chipware 600 is divided into left and right- hand end part 611 and 615 and main part 613.Form the circumference of illusion from the camber line of main part 613 extensions.Because the material of chipware 600 does not extend around whole circumference and forms the sealing tubular-shaped structures, has therefore formed gap 630, and has curved inwardly on a left side and right- hand end part 611 and 615, does not converge in the gap 630 that left and right- hand end part 611 and 615 stay.
In addition, a left side and right- hand end part 611 and 615 can be positioned at the inboard of the imaginary circumference that the camber line by the extension of the external peripheral surface of main part 613 forms.
Moreover, because second sweep 611 and 615 is along the 620 ' bending of second line, so the edge of the left side of chipware 600 and right- hand end part 611 and 615 camber line that can extend towards the external peripheral surface from main part 613.In other words, second sweep 620 can make a left side and right- hand end part 611 and 615 respectively along with the rotation direction bending of the inside direction of rotation of first sweep 610, make left and right- hand end part 611 and 615 illusion circumferential extensions to chipware 600.
In addition, in a left side and right- hand end part 611 and 615, the exterior section of second sweep 620 is surrounded along three-way 640 ' crooked a pair of the 3rd sweep 640.In other words, a left side and right- hand end part 611 and 615 the 3rd sweep 640 by being positioned at second sweep, 620 outsides is along the rotation direction bending of second sweep 610.
A left side and right- hand end part 611 and 615 edge can be respectively contact with phantom arc from the external peripheral surface extension of main part 613.
Imaginary line that extends from each second sweeps 620 of a left side and right- hand end part 611 and 615 or plane also can relative to each other form the angle α that is equal to or less than 120 ° by the axis of chipware.
Therefore, when chipware 600 for example vertically pushes when being out of shape because of external pressure, can avoid electrode assemblie 300 by the damage of edges of the left side of chipware 600 and right-hand end part 611 and 615.In particular, in the time of can in chipware 600, avoiding causing that because of chipware distortion the dividing plate of electrode assemblie is damaged in the end of chipware in electrode assemblie 300 inboard contingent short circuits.
Preferred but nonessential is that chipware 600 can be less than the diameter of central part office at the diameter at first end and the second end place.That is to say that first tubular end and second tubular end of chipware 600 can comprise tapering part.When chipware 600 was inserted the central space of electrode assemblie 300, tapering part can prevent that dividing plate 300 from being damaged by chipware 600.Because tapering part, first tubular end of chipware 600 and the diameter at the second tubular end place are littler than the diameter of central portion office.
In addition, when the tubular end of chipware was positioned on second electrode contact 325, the height of chipware 600 can be approximately 90% to 110% of electrode assemblie 300 height.If the height of chipware 600 be equal to or less than electrode assemblie 300 height 90%, chipware 600 lacks enough intensity and fixes and support electrode assembly 300.In addition, if highly be equal to or greater than 110% of electrode assemblie height, chipware 600 may contact with the parts of cap assemblies 500, may cause some problems thus.
To 4C, the chipware 700 of the cylindrical lithium secondary battery 200 of another execution mode of the present invention has the chipware 600 similar structures to shown this execution mode of the present invention of 3C with Fig. 3 A with reference to figure 4A.Unique difference is the left side of chipware 700 and right- hand end part 711 and 715 by 702 bendings of second sweep, and the edge surface of a left side and right- hand end part 711 and 715 is to the circumferential surface of chipware 700.
More particularly, the chipware plate of making by metallic plate by reeling 700 ' form chipware 700, it is tubular that this chipware is substantially.In addition, along vertical formation gap 710 of chipware 700.
A left side and right- hand end part 711 and 715 by along chipware plate 700 ' first line 710 ' aduncate a pair of first sweep 710 can be inwardly towards chipware 700.
In the left side and right- hand end part 711 and 715 of chipware 700, a left side and right- hand end part 711 and 715 edge can contact with the circumferential surface of chipware 700 along second line 720 ' by a pair of second sweep 720 of the edge inside rotation direction bending identical with first sweep 710.
In addition, in a left side and right- hand end part 711 and 715, the exterior section of second sweep 720 by along the three-way 740 ' towards with a pair of the 3rd sweep 740 encirclements of the rotation direction bending of the direction of rotation of second sweep 720.
Illusion line that extends internally from respectively second sweeps 720 of a left side and right- hand end part 711 and 715 or plane by chipware axis and can relative to each other form the angle β that is equal to or less than 120 °.
As mentioned above, because the cylindrical lithium secondary battery 200 of some embodiments of the present invention comprises as Fig. 3 A to 3C or Fig. 4 A to one of the shown chipware 600 of 4C or 700, when chipware 600 or 700 because of as the external pressure of vertical extruding and so on when being out of shape, electrode assemblie 300 can avoid respectively by the left side of chipware 600 and right- hand end part 611 and 615 or the left side of chipware 700 and the damage of edges of right-hand end part 711 and 715.In particular, if use chipware 600 or 700, can avoid causing electrode assemblie inside to be short-circuited because of the dividing plate that the chipware distortion makes the end of chipware damage electrode assemblie.
Fig. 5 A is the vertical cross-section view of the cylindrical lithium secondary battery of the another execution mode of the present invention.Fig. 5 B is the level cross-sectionn figure of the cylindrical lithium secondary battery of this execution mode of the present invention.
The overall structure of the cylindrical lithium secondary battery shown in the overall structure of the cylindrical lithium secondary battery shown in Fig. 5 A to 5B and Fig. 2 A to 2C is similar.
The unique difference that can see is the structure of chipware.Chipware 800 is inserted in the central space of winding-typed electrode assembly 300, prevents that winding-typed electrode assembly 300 from unclamping and becoming flexible, and can also prevent that winding-typed electrode assembly 300 is out of shape because of external pressure.It is tubular that chipware 800 is substantially.Vertical formation cutting groove 810 along chipware 800.Cutting groove 810 combines when chipware 800 links together with electrode assemblie 300.In some cases, cutting groove 810 can separate and keep specific distance.
In addition, chipware 800 is included in the bottom of chipware 800, promptly towards the bottom of housing or the jut 820 of the outstanding length-specific of the tubular end of the chipware 800 of closed ends, and vertically on the inner surface of tubular chipware 800, form at least one recess 830 along chipware 800.
In addition, when the tubular end of chipware 800 was positioned on second electrode contact 325, the height of chipware 800 approximately was 90% to 110% of electrode assemblie 300 height.If the height of chipware 800 is equal to or less than 90% of electrode assemblie 300 height, chipware 800 lacks sufficient intensity and fixes and supporting electrode assembly 300.In addition, if the height of chipware 800 is equal to or greater than 110% of electrode assemblie 300 height, chipware 600 may contact with the parts of cap assemblies 500, will cause some problems thus.
Although do not illustrate,, make lithium ion between electrode, to move can electrolytic solution is injected in the cylindrical housings 400.During charge/discharge, electrolytic solution plays to take place in the positive electrode of mobile battery inside and the negative electrode medium of lithium (Li) ion that electrochemical reaction produces.Electrolytic solution can be non-water organic electrolysis solution, and it is the mixture of high-purity lithium salts and organic solvent.And electrolytic solution can be to use the polymer of polymer dielectric, and certainly, the electrolytic solution type of material is not limited thereto.
Fig. 6 A and 6B are the chipware perspective views of the cylindrical lithium secondary battery of other execution modes of the present invention.
With reference to figure 6A and 6B, the chipware 800 and 900 of cylindrical lithium secondary battery 200 is tubular substantially, along vertical formation cutting groove 810 and 910 of chipware 800 and 900.Term as used herein " cutting groove " is meant any axial clearance in coiling chipware 800 and 900.With chipware form tubular after, can form cutting groove by the cutting chipware, perhaps the plate that forms chipware by cutting form cutting groove, therefore when forming chipware, panel material to extend on whole circumference.
Each chipware 800 and 900 comprises from the projection 820 and 920 of the outstanding length-specific in bottom of chipware 800 or 900.Each chipware 800 and 900 all is tubular, and wherein, the diameter of chipware 800 and 900 upper and lower edges is less than the diameter of its middle body.This can be avoided when chipware 800 and 900 rotates owing to external pressure, the bottom of the parts of electrode assemblie 300, and for example, the bottom of first battery lead plate 310, second battery lead plate 320 and dividing plate 330 is cut groove 810 and 910 and damages.
In addition, the vertically inner surface in tubular chipware 800 and 900 along chipware 800 and 900 forms one or more recess 830 and 930.Can pre-determine the deformation direction of chipware 800 and 900 by means of recess 830 and 930, therefore when external pressure is equal to, or greater than the specified pressure that applies, chipware 800 and 900 can be out of shape along predetermined direction, therefore can avoid electrode assemblie 300 short circuits, otherwise may be short-circuited when chipware 800 and 900 distortion.
The recess 830 and 930 that can the various forms setting be formed at the inner surface of chipware 800 and 900.
For example, as shown in Fig. 6 A, at the inner surface of chipware 800, chipware 800 can comprise a pair of recess 830 along vertical formation of chipware 800.Here, the form that recess 830 can symmetry is positioned at a left side and the right side of cutting groove 810, and is positioned on the circumference with 45 from a left side and the right side of cutting groove 810.In other words, recess 830 can be positioned at a left side and the right side of cutting groove 810 apart from cutting groove same distance ground.
As shown in Fig. 6 B, chipware 900 can be included in four recesses 930 of chipware 900 inner surfaces along vertical formation of chipware 900.Four recesses 930 can be respectively being positioned at a left side and right side in couples with symmetrical manner with respect to cutting groove 910, and can be 45 °, 135 °, 225 ° and 315 ° of ground with respect to cutting groove 910 and be positioned on the circumference of chipware.In other words, being formed on the imaginary line that connects adjacent recesses in four recesses 930 on the inside circumferential surface of chipware 800 can form trapezoidal.Especially four recesses 930 that are formed on the circumference of chipware 900 can be arranged so that the imaginary line that connects each adjacent recess forms square.
As mentioned above, the cylindrical lithium secondary battery 200 of these execution modes of the present invention is included in the projection 820 and 930 and the recess 830 and 930 that longitudinally forms of the inner surface in chipware 800 and 900 of chipware 800 and 900 bottoms, can improve the stability of cylindrical lithium secondary battery 200 whereby.
In particular, when chipware 800 and 900 rotated, the projection 820 and 920 that is formed on the bottom of chipware 800 and 900 can prevent the damage of electrode assemblie 300 bottoms.
In addition, when external pressure was equal to, or greater than the specified pressure that is applied on chipware 800 and 900, recess 830 and 930 can make chipware 800 and 900 be deformed into spiral-shaped along its center position.Therefore, can prevent owing to chipware 800 and 900 is out of shape the electrode assemblie short circuit that causes.
Fig. 7 is the present invention's perspective view of an execution mode again.With reference to figure 7, along vertical formation at least one slit 1010 of tubular chipware 1000.Slit 1010 does not extend to first and second pipe ends of chipware 1000, in fact, compares with traditional chipware 100 shown in Figure 1, and first and second pipe ends of the chipware 1000 of present embodiment are not by recess, cutting groove or gap cutting or interruption.Therefore, even when chipware 1000 is out of shape because of external pressure, the edge of chipware 1000 is point not too also, and becomes more full of elasticity with respect to distortion.Do not have at pipe end under the situation in slit or gap, be tapered by first and second pipe ends that make chipware 1000, even when chipware 1000 distortion, the possibility that electrode assemblie is damaged by the top and bottom of chipware 1000 is less.
Therefore, with respect to external pressure, the invention provides a kind of cylindrical lithium secondary battery with the stability improved.
Although illustrated and described several embodiments of the present invention above, but obviously, under the prerequisite that does not deviate from principle of the present invention and design, those skilled in the art can carry out conversion to these execution modes in claim and their equivalent institute restricted portion.
Claims (7)
1. cylindrical lithium secondary battery comprises:
Have first battery lead plate, second battery lead plate and be arranged on the electrode assemblie of the dividing plate between described first battery lead plate and second battery lead plate, this electrode assemblie is wound into spirality and has the central space that is in the coiling center;
Be inserted into the chipware of described electrode assemblie central space;
Housing with the space that holds described electrode assemblie;
Be connected with described shell nozzle end sealing the cap assemblies of described housing,
Wherein said chipware is formed tubular, and it has the axial clearance, and this gap is divided into main part and a left side and right-hand end part with described chipware, and wherein the phantom arc of extending from the external peripheral surface of described chipware main part limits an imaginary circumference, reaches
A wherein said left side and right-hand end partly are positioned at the inboard of described imaginary circumference, and they comprise a pair of curve inwardly and with respect to symmetrically arranged first sweep in described gap and a pair of edge second sweep with the rotation direction bending of the direction of rotation that curves inwardly of described first sweep.
2. cylindrical lithium secondary battery according to claim 1, wherein, a described left side and right-hand end part also comprise a pair of the 3rd sweep that is in the described second sweep exterior section, and wherein said the 3rd sweep is along the rotation direction bending of described second sweep.
3. cylindrical lithium secondary battery according to claim 2, wherein, the edge of a described left side and right-hand end part is positioned on the phantom arc of the external peripheral surface extension of described chipware main part.
4. cylindrical lithium secondary battery according to claim 1, wherein, the imaginary line that extends internally from each second sweep of a described left side and right-hand end part is by the axis of described chipware and relative to each other form the angle that is equal to or less than 120 °.
5. cylindrical lithium secondary battery according to claim 1, wherein, described chipware is made by metal material.
6. cylindrical lithium secondary battery according to claim 1, wherein, described chipware at the diameter at the first and second tube end places less than diameter at middle body.
7. cylindrical lithium secondary battery according to claim 1, wherein, the height of described chipware is 90% to 110% of a described electrode assemblie height.
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR35301/05 | 2005-04-27 | ||
| KR1020050035301A KR100646531B1 (en) | 2005-04-27 | 2005-04-27 | Cylindrical Li Secondary battery |
| KR41422/05 | 2005-05-18 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101390526A Division CN101582520B (en) | 2005-04-27 | 2006-04-27 | Cylindrical lithium secondary battery |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1877899A CN1877899A (en) | 2006-12-13 |
| CN100563057C true CN100563057C (en) | 2009-11-25 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101390526A Active CN101582520B (en) | 2005-04-27 | 2006-04-27 | Cylindrical lithium secondary battery |
| CNB2006101060467A Active CN100563057C (en) | 2005-04-27 | 2006-04-27 | Cylindrical lithium secondary battery |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009101390526A Active CN101582520B (en) | 2005-04-27 | 2006-04-27 | Cylindrical lithium secondary battery |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100646531B1 (en) |
| CN (2) | CN101582520B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN104882640B (en) * | 2015-05-25 | 2017-07-28 | 江苏华东锂电技术研究院有限公司 | Safety lithium ion cell |
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2005
- 2005-04-27 KR KR1020050035301A patent/KR100646531B1/en active IP Right Grant
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- 2006-04-27 CN CN2009101390526A patent/CN101582520B/en active Active
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Also Published As
| Publication number | Publication date |
|---|---|
| KR100646531B1 (en) | 2006-11-23 |
| CN101582520A (en) | 2009-11-18 |
| CN101582520B (en) | 2011-09-07 |
| KR20060112741A (en) | 2006-11-02 |
| CN1877899A (en) | 2006-12-13 |
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