CN100428535C - Secondary battery - Google Patents
Secondary battery Download PDFInfo
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- CN100428535C CN100428535C CNB2005100800239A CN200510080023A CN100428535C CN 100428535 C CN100428535 C CN 100428535C CN B2005100800239 A CNB2005100800239 A CN B2005100800239A CN 200510080023 A CN200510080023 A CN 200510080023A CN 100428535 C CN100428535 C CN 100428535C
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- Prior art keywords
- plate
- secondary cell
- injecting hole
- electrolyte
- cell according
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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
- H01M50/60—Arrangements or processes for filling or topping-up with liquids; Arrangements or processes for draining liquids from casings
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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
- H01M10/04—Construction or manufacture in general
- H01M10/0431—Cells with wound or folded electrodes
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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
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
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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 of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
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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
- H01M2220/00—Batteries for particular applications
- H01M2220/30—Batteries in portable systems, e.g. mobile phone, laptop
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- 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
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- 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
Abstract
In a secondary battery having an electrolyte injection hole having improved sealing structure to improve the safety of the can-type secondary battery and to prevent the electrolyte from leaking, the electrolyte injection hole is sealed by welding the sealing plate on top of the cap plate so that the electrolyte is prevented from flowing into the welded portion. Since no fine gap is created in the electrolyte injection hole, the electrolyte is prevented from flowing into the welded portion due to a capillary phenomenon and no pin hole caused by the electrolyte is formed in the welded portion.
Description
Priority request
It is that the sequence number of distributing secondary cell, formal is the ownership equity of the application of 10-2004-0047999 that the application requires the basis title that is delivered to Korea S Department of Intellectual Property on June 25th, 2004 more early, and the application is included in this as a reference with above-mentioned application.
Technical field
The present invention relates to secondary cell, more particularly, relate to a kind of have have improved hermetically-sealed construction with fail safe that improves secondary cell and the secondary cell that prevents the electrolyte injecting hole of electrolyte leakage.
Background technology
Because the development trend that comprises the portable radio machine of video camera, portable phone and portable computer and so on is the multi-purpose while weight reduction of combination, therefore the secondary cell as the drive source of these equipment has been carried out a large amount of research.For example, secondary cell comprises nickel-cadmium cell, Ni-MH battery, nickel-zinc cell and lithium secondary battery.Because lithium secondary battery can recharge, can manufacture big capacity small size and have high operating voltage and high per unit weight energy density, so lithium secondary battery is extensive use of in the electronic device field ahead of the curve.
This secondary cell is by in the jar of the generating element (that is, electrode assemblie) that comprises positive and negative pole plate and dividing plate being packed into by the metal manufacturing, electrolyte is injected in the jar, and hermetically sealed can forms.After hermetically sealed can, electrode terminal is positioned at the top of secondary cell and insulate with jar.Electrode terminal serves as an electrode of battery, and another electrode of jar own rechargeable battery.
After sealing, with secondary cell be connected to comprise the second protection device (for example, PTC) and the protective circuit module at interior cell safety device, and be placed in the battery pack.The cell safety device is connected respectively to the positive and negative utmost point, with box lunch owing to overcharge/interruptive current and prevent damage when overdischarge raises the temperature of battery or voltage, for example, the breaking of battery.
In the secondary cell of the electrolyte injecting hole on having the cover plate that is formed on plain battery, jar be canister with the cubic shape that has open-top, and preferably by light and conduction and erosion-resisting aluminum or aluminum alloy make.Jar plays the effect of the container that is used to hold the electrode assemblie that comprises positive pole, dividing plate and negative pole and electrolyte.The top of electrode assemblie through opening wide promptly, with the open top of cap assemblies sealing, is inserted in the jar subsequently.
Cap assemblies has the cover plate that has corresponding to the plane of the open-topped size and dimension of jar.Cover plate is preferably by making with jar identical materials (that is, aluminum or aluminum alloy), with the welding performance that improves jar.Cover plate has formation terminal through-hole in the central, so that electrode terminal can pass.The tubular gasket of passing the central authorities of cover plate is positioned at the outside of negative terminal, so that make electric insulation between negative terminal and the cover plate.Insulation board is positioned at the position of the lower surface of cover plate near the terminal through-hole of cover plate.Terminal board is positioned on the lower surface of insulation board.
Electrode assemblie is to form by the coiling positive and negative utmost point and the dividing plate that is clipped between them.The anodal contact pin of anodal process is electrically connected to cover plate, and the contact pin of negative pole process negative pole is electrically connected to the negative terminal of cover plate.Therefore, jar with the negative terminal electric insulation, and play the effect of positive terminal.After the top that cap assemblies is welded to jar, the electrolyte injecting hole of electrolyte through cover plate injected.Injecting the electrolyte into the hole seals with the connector of being made by the pill of aluminium that is pressed into wherein.In addition, liquid resin or resin liquid drop can be applied to the top of connector, and use up or hot curing, so that prevent electrolyte leakage with dual mode.
Lead plate is formed on the top of electrolyte injecting hole, and is connected to the isolation protective circuit module.Lead plate has the bottom of the predetermined area that has at least one cover plate that is used for being connected to face-to-face plain battery and stretches out so that be connected to the extension of the electric terminal of protective circuit module from bottom vertical.Extension is connected on the electrode contact of stacked protective circuit module.
But, the problem that this secondary cell exists is, because electrolyte injecting hole is to seal by being pressed into wherein by the connector of pill of aluminium manufacturing, so tiny gap can exist between electrolyte injecting hole and the connector, and electrolyte may pass through this clearance leakage.Particularly, because secondary cell will have bigger capacity, thus a large amount of electrolyte is injected in the jar, and electrolyte may leak into the top of electrolyte injecting hole owing to the capillarity between electrolyte injecting hole and the pearl that is pressed into.As a result, because electrolyte makes the welding between electrolyte injecting hole and the pearl become unstable, and produce pin hole at welding portion.
In addition, because the pill of aluminium is pressed in the electrolyte injecting hole, and make thin cover plate distortion, thus also make the electrolyte injecting hole distortion.As a result, even when being pressed into the pill of aluminium in the electrolyte injecting hole, also can between the electrolyte injecting hole and the pill of aluminium, form slight gap, and electrolyte may leak.
Summary of the invention
Therefore, made the present invention in order to solve the problem that occurs in the above-mentioned prior art, the objective of the invention is to provide a kind of have have improved hermetically-sealed construction with fail safe that improves secondary cell and the secondary cell that prevents the electrolyte injecting hole of electrolyte leakage.
For reaching this purpose, a kind of secondary cell is provided, this secondary cell comprises: the electrode assemblie that comprises the positive and negative pole plate; Be used to hold the jar of this electrode assemblie and electrolyte; Comprise the open-topped cap assemblies that has the cover plate that is arranged in the electrolyte injecting hole on the one side and be suitable for sealing this jar; With on the upper surface that is arranged in this cover plate to seal the sealing plate of this electrolyte injecting hole.
The sealing plate preferably is soldered to the upper surface of this cover plate.The sealing plate is preferred soldered so that welding portion limits the ring of sealing at the periphery of this electrolyte injecting hole.This welding portion preferably includes the annular shape of arranging around this electrolyte injecting hole.Inboard preferred and this electrolyte injecting hole interval of the ring of this welding portion is 0.1mm at least.
The sealing plate preferably welds by Laser Welding.The scope of this depth of weld is 0.15mm to 0.50mm preferably.The sealing plate preferably includes the nickel metallic plate.The sealing plate preferably includes the top nickel metallic plate that is attached to the bottom aluminium metal sheet.
The sealing plate preferably includes the top nickel metallic plate that is attached to the bottom aluminium metal sheet.It is 0.05 to 0.45mm thickness that the sealing plate preferably has scope.
This secondary cell preferably further comprises the protective circuit module that is electrically connected to this cap assemblies; wherein the sealing plate preferably extends along the longitudinal direction; one side of sealing plate preferably is soldered to this electrolyte injecting hole, and the electrode contact of this protective circuit module preferably is connected to the opposite side of sealing plate.
The sealing plate preferably has the prolongation that protrudes upward from the lateral surfaces of its opposite side, and the electrode contact of this protective circuit module preferably is connected to this prolongation.
This cover plate preferably has the seat groove on the top that is arranged in this electrolyte injecting hole, and the gravel size decision of this groove is corresponding to the size of sealing plate, thereby the sealing plate is placed on this groove.
The sealing plate preferably has corresponding to the outstanding downwards welded unit in the zone of this electrolyte injecting hole, and the outside of this welded unit preferably is soldered on this cover plate.
This welded unit preferably has diameter or the side circular or foursquare shape greater than the diameter of electrolyte injecting hole.
The sealing plate preferably has the elastomer that is arranged on its lower surface, and this elastomeric external diameter is preferably corresponding to the internal diameter of electrolyte injecting hole.
This elastomeric height is less than cover sheet thickness.
This elastomer preferably comprises the organic material of selecting from the group of being made of polypropylene (PP), polyphenylene sulfide (PPS), polyimides (PI) and Nylon 66.
This secondary cell preferably further comprises the protective circuit module that is electrically connected to this cap assemblies; this protective circuit module preferably has the positive and negative utmost point lead plate of the positive and negative utmost point that is connected to this secondary cell; and the sealing plate preferably includes in the described lead plate and is fixed on the top of this electrolyte injecting hole, forms the welding portion greater than the neighboring of this electrolyte injecting hole simultaneously.
This lead plate preferably comprises conductive plate.
This negative wire plate is preferred soldered and be fixed to the negative terminal of this secondary cell, and this positive wire plate is preferably soldered and be fixed to this cover plate at the top of electrolyte injecting hole.
This protective circuit module preferably is disposed on the top of this cap assemblies.
This welding portion preferably centers on the neighboring of this electrolyte injecting hole.
The area of this welding portion is the twice at least of the cross-sectional area of this electrolyte injecting hole preferably.
This welding portion preferably has at least two sealing wires, and in the described sealing wire one is around another sealing wire.
The top of this electrolyte injecting hole is preferably formed chamfering.
This electrode assemblie preferably includes the positive/negative plate of reeling with the dividing plate that places between the positive/negative plate.
This secondary cell preferably further comprises the protective circuit module that is electrically connected to this cap assemblies.
Description of drawings
Also with reference to following detailed description, the present invention may be better understood, and more complete understanding of the present invention and many attendant advantages will be become clearly in conjunction with the accompanying drawings.Wherein, the identical identical or similar elements of reference marker indication, wherein:
Fig. 1 is the partial section on top with habitual secondary cell of the electrolyte injecting hole on the cover plate that is formed on plain battery;
Fig. 2 a is the partial section on the top of secondary cell according to an embodiment of the invention;
Fig. 2 b is the vertical view of the secondary cell among Fig. 2 a;
Fig. 3 be in accordance with another embodiment of the present invention sealing plate the assembling sectional view;
Fig. 4 be in accordance with another embodiment of the present invention cover plate and sealing plate the assembling sectional view;
Fig. 5 a be in accordance with another embodiment of the present invention sealing plate the assembling sectional view;
Fig. 5 b be among Fig. 5 a sealing plate vertical view;
Fig. 6 be in accordance with another embodiment of the present invention sealing plate the assembling sectional view;
Fig. 7 be in accordance with another embodiment of the present invention sealing plate the assembling sectional view;
Fig. 8 a be comprise sealing plate in accordance with another embodiment of the present invention the partial section of lithium secondary battery;
Fig. 8 b is the partial top view of lead plate of protective circuit module of electrolyte injecting hole that is used for the secondary cell of sealed picture 8a; With
Fig. 9 be comprise sealing plate in accordance with another embodiment of the present invention the perspective view of lithium secondary battery.
Embodiment
Fig. 1 is the partial section with top of the secondary cell that is formed on the electrolyte injecting hole on the plain battery cover plate.
With reference to Fig. 1, jars 20 is the canisters with the cubic shape that has open-top, and preferably by light and conduction and erosion-resisting aluminum or aluminum alloy are made.Jars 20 play the effect of the container that is used to hold the electrode assemblie 22 that comprises anodal 23, dividing plate 24 and negative pole 25 and electrolyte.The top of electrode assemblie 22 through opening wide promptly, with the open top of cap assemblies 30 sealings, is inserted in the jar 20 subsequently.
Cap assemblies 30 has the cover plate 31 that has corresponding to the plane of the open-topped size and dimension of jar 20.Cover plate 31 is preferably by making with jar 20 identical materials (that is, aluminum or aluminum alloy), to improve jars 20 welding performance.Cover plate 31 has formation terminal through-hole in the central, so that electrode terminal can pass.The tubular gasket 33 of passing the central authorities of cover plate 31 is positioned at the outside of negative terminal 32, so that make electric insulation between negative terminal 32 and the cover plate 31.Insulation board 34 is positioned at the position of the lower surface of cover plate 31 near the terminal through-hole of cover plate 31.Terminal board 35 is positioned on the lower surface of insulation board 34.
Electrode assemblie 22 is to form by the coiling positive and negative utmost point and the dividing plate that is clipped between them.The anodal contact pin 26 of anodal 23 processes is electrically connected to cover plate 31, and negative pole 25 is electrically connected to the negative terminal 32 of cover plate 31 through negative pole contact pin 27.Therefore, jars 20 with negative terminal 32 electric insulations, and play the effect of positive terminal.After the top that cap assemblies 30 is welded to jar 20, the electrolyte injecting hole 36 of electrolyte through cover plate 31 injected.Inject the electrolyte into hole 36 usefulness and be pressed into wherein connector 37 sealings of making by the pill of aluminium.In addition, liquid resin or resin liquid drop can be applied to the top of connector 37, and use up or hot curing, so that prevent electrolyte leakage with dual mode.
Lead plate 40 is formed on the top of electrolyte injecting hole 36, and is connected to the isolation protective circuit module.Lead plate 40 has the bottom 42 of the predetermined area that has at least one cover plate 31 that is used for being connected to face-to-face plain battery, with 42 vertical the stretching out so that be connected to the extension 44 of the electric terminal of protective circuit module from the bottom.Extension 44 is connected on the electrode contact of stacked protective circuit module.
But, the problem that this secondary cell exists is, because electrolyte injecting hole 36 is to seal by being pressed into wherein by the connector 37 of pill of aluminium manufacturing, so tiny gap can exist between electrolyte injecting hole 36 and the connector 37, and electrolyte may pass through this clearance leakage.Particularly, because secondary cell will have bigger capacity, thus a large amount of electrolyte is injected in the jar 20, and electrolyte may leak into the top of electrolyte injecting hole 36 owing to the capillarity between electrolyte injecting hole 36 and the pearl 37 that is pressed into.As a result, because electrolyte makes the welding between electrolyte injecting hole 36 and the pearl 37 become unstable, and produce pin hole at welding portion.
In addition, because the pill of aluminium is pressed in the electrolyte injecting hole, and make thin cover plate distortion, thus also make the electrolyte injecting hole distortion.As a result, even when being pressed into the pill of aluminium in the electrolyte injecting hole, also can between the electrolyte injecting hole and the pill of aluminium, form slight gap, and electrolyte may leak.
Fig. 2 a is the partial section on the top of secondary cell according to an embodiment of the invention; Fig. 2 b is the vertical view of the secondary cell among Fig. 2 a; Fig. 3 be according to another embodiment of the present invention sealing plate the assembling sectional view; Fig. 4 be according to another embodiment of the present invention cover plate and sealing plate the assembling sectional view; Fig. 5 a be according to another embodiment of the present invention sealing plate the assembling sectional view; Fig. 5 b be among Fig. 5 a sealing plate vertical view; Fig. 6 be according to another embodiment of the present invention sealing plate the assembling sectional view; Fig. 7 be according to another embodiment of the present invention sealing plate the assembling sectional view; Fig. 8 a be comprise sealing plate according to another embodiment of the present invention the partial section of lithium secondary battery; Fig. 8 b is the partial top view of lead plate of protective circuit module that is used for the electrolyte injecting hole of sealed picture 8a secondary cell; Fig. 9 be comprise sealing plate according to another embodiment of the present invention the perspective view of lithium secondary battery.
With reference to Fig. 2 a and 2b, secondary cell according to the present invention comprises jars 120, be contained in the electrode assemblie 122 in jars 120 and be used for the open-topped cap assemblies 130 of hermetically sealed can 120.
The jar 120 that is used for square lithium secondary battery is the cuboidal canisters with open-top, and is generally made by light and corrosion resistant aluminum or aluminum alloy.Jars 120 play the effect of the container that holds the electrode assemblie 122 that comprises anodal 123, dividing plate 124 and negative pole 125 and electrolyte.The top of electrode assemblie 122 through opening wide, that is, open top is inserted in the jar 120, and this open top is subsequently with cap assemblies 130 sealings.
The lip-deep electrolyte injecting hole 136 of sealing plate 140 seal cover boards.Sealing plate 140 is the plates with pre-sizing, and is soldered to the periphery of electrolyte injecting hole 136, with hermetic electrolyte liquid hand-hole.More particularly, with sealing plate 149, the mode that forms closed-loops with welding portion 141 is welded to the periphery of electrolyte injecting hole 136, with hermetic electrolyte liquid hand-hole.In order to be easy to welding sequence, the closed-loop of welding portion 141 is preferably the toroidal that has around electrolyte injecting hole 136.Sealing plate 140 is by nickel or aluminium manufacturing, and in order to obtain stable intensity, preferably makes with nickel.Sealing plate 140 has 0.05 to 0.45mm thickness, and the thickness of sealing plate 140 relates to the sealing property of sealing plate 140, the thickness and the easy weldability of cover plate 131.If the thickness of sealing plate 140 is too little, the sealing effectiveness of sealing plate 140 reduces so, and, when the electrode contact of fixing protective circuit module fixedly the time, can not support electrode contact pin.If the thickness of sealing plate 140 is too big, weld the difficulty that becomes so.
Fig. 3 be according to another embodiment of the present invention sealing plate the assembling sectional view.
With reference to Fig. 3, sealing plate 240 preferably passes through to form in conjunction with different kinds of metals.Sealing plate 240 is preferably by constituting in conjunction with top nickel metallic plate 242 and bottom aluminium metal sheet 244.Sealing plate 240 in the face of the bottom of cover plate 131 is to use the metal (that is, aluminium) identical with cover plate 131 to form, to improve solderability.The nickel metallic plate 242 that constitutes sealing plate 240 tops keeps the intensity of sealing plate 240, and improves the solderability of the electrode contact (nickel is made) to protective circuit module (not shown).
Fig. 4 be according to another embodiment of the present invention cover plate and sealing plate the assembling sectional view.
With reference to Fig. 4, cover plate 331 has the seat groove 339 on the top that is formed on electrolyte injecting hole 336 according to another embodiment of the present invention, from the size of the seat groove 339 of the upper surface of the cover plate 331 depression size corresponding to sealing plate 140.Seat groove 339 is from the degree of depth of the upper surface of the cover plate 331 depression thickness less than sealing plate 140.Sealing plate 140 is settled on the present groove 339, and the mode of the annular welding portion 141 by having the diameter bigger than the diameter of electrolyte injecting hole 336 with formation, is fixed by welding on the groove 339.Welding portion 141 can form square.Like this, with sealing plate 140 welding and be placed in fixing position, and the link position of also fixing electrode contact to protective circuit module (not shown).Therefore, can avoid because any defective that cause unfixed welding position.
Fig. 5 a be according to another embodiment of the present invention sealing plate the assembling sectional view, Fig. 5 b be among Fig. 5 a sealing plate vertical view.
With reference to Fig. 5 a and 5b, sealing plate 340 has the prolongation 346 that protrudes upward from the lateral surfaces of its opposite side according to another embodiment of the present invention.With a kind of like this mode welded seal plate 340, make it possible to form the welding portion 341 of annular, the diameter of annular is greater than the diameter of electrolyte injecting hole 136.Also welding portion 341 can be formed square.Prolongation 346 has predetermined height and width, and preferably has the height less than the electrode terminal (not shown), so that secondary cell can be manufactured littler size.The connection lead-in wire that is arranged on the protective circuit module on the top of cover plate 131 can weld and be connected to prolongation 346.
Fig. 6 be according to another embodiment of the present invention sealing plate the assembling sectional view.
With reference to Fig. 6, sealing plate 440 has outstanding welded unit 442 downwards in the zone corresponding to the electrolyte injecting hole 136 of cover plate 131 according to another embodiment of the present invention.Welded unit 442 has predetermined shape and greater than the area of electrolyte injecting hole 136 areas.Welded unit 442 preferably diameter and is welded to cover plate 131 in the mode that forms welding portion 441 at circumferencial direction on the outside of welded unit 442 greater than the circle of electrolyte injecting hole 136.Welding portion 441 also can form the square that has greater than the side of the diameter of electrolyte injecting hole 136.When in the zone of the welding portion 442 of the upper surface that sealing plate 440 tightly is fixed on cover plate 131, can more easily carry out welding, and can avoid the local bad any weld defect that causes that contacts between sealing plate 440 and the cover plate 131.
Fig. 7 be according to another embodiment of the present invention sealing plate the assembling sectional view.
With reference to Fig. 7, according to another embodiment of the present invention sealing plate 540 can have be attached to that it is shown below, have a elastomer 545 corresponding to the external diameter of the internal diameter of electrolyte injecting hole 136.For example, if electrolyte injecting hole 136 has cylindrical shape, elastomer 545 is the shapes that have corresponding to the cylinder scapus of the external diameter of the internal diameter of electrolyte injecting hole 136 so.Elastomer 545 preferably has the height less than cover plate 131 thickness.Elastomer 545 is made by elastic organic material, and preferably by the made of the electrolyte resistance that comprises polypropylene (PP), polyphenylene sulfide (PPS), polyimides (PI) and Nylon 66 and so on, but be not limited to material described here.When sealing plate 540 being placed on the cover plate 131 and during preliminary hermetic electrolyte liquid hand-hole 136, elastomer 545 being inserted electrolyte injecting holes 136.Form welding portion 541 by neighboring, sealing plate 540 is welded to cover plate 131 at electrolyte injecting hole 136.Welding portion 541 can be formed and have greater than the diameter of the diameter of electrolyte injecting hole 136 or the circle or the square shape of side.
Fig. 8 a be comprise sealing plate according to another embodiment of the present invention the partial section of lithium secondary battery.Fig. 8 b is used for the position of lead plate of protective circuit module of hermetic electrolyte liquid hand-hole and the vertical view of sealing wire.
With reference to Fig. 8 a and 8b, sealing plate forms the positive and negative utmost point lead plate 640a of the lower surface that is connected to the protective circuit module 150 that is arranged in electrolyte injecting hole 136 and electrode terminal 132 tops and of 640b according to another embodiment of the present invention.Positive and negative utmost point lead plate 640a and 640b are electrically connected to electrode terminal 132 and cover plate 131 with protective circuit module 150, and can be aluminium or the nickel of lamination and the thin plate formation of aluminium by conductor nickel (Ni), aluminium (Al), nickel coating.
When covering electrolyte injecting hole 136 fully with sealing plate, by along being formed on the sealing wire L welded seal plate of the welding portion 641 of electrolyte injecting hole 136 peripheries, that is, and positive wire plate 640a, hermetic electrolyte liquid hand-hole 136.Weld preferably Laser Welding, and the bonding area that sealed of the sealing wire L of welding portion 641 is preferred at least than the big twice of cross-sectional area of electrolyte injecting hole 136, to improve sealing property.As shown in Fig. 8 b, the sealing wire L of welding portion 641 forms the ring of sealing on the neighboring of electrolyte injecting hole 136, and can be in comprising and the two-wire of outside line.Two sealing wire L have the advantage that improves sealing property.Particularly, even when interior sealing wire generation weld defect, the outside weld wiring also can be to its second compensation.This has further improved sealing.
When the sealing wire L of welding portion 641 is positioned at the outside of neighboring of electrolyte injecting hole 136, further improved weldability.Owing to do not have pearl to be inserted in the electrolyte injecting hole 136, so near electrolyte injecting hole 136, capillarity can not take place.Even when electrolyte injecting hole 136 peripheral contaminated, sealing wire L and electrolyte injecting hole 136 at interval be enough to compensate the distance of pollution.Therefore, the pollution of electrolyte can not occur near the sealing wire L of actual execution welding, thereby weld defect can not take place.
In using lead plate 640a and 640b one, has reduced and has made the required number of processes of lithium secondary battery by this way during hermetic electrolyte liquid hand-hole 136 as sealing plate.Particularly, omitted the pearl that to separate and be pressed into electrolyte injecting hole 136 to seal its processing procedure.Connect the processing procedure of protective circuit module 150 and the processing procedure of hermetic electrolyte liquid hand-hole 136 and be combined into single processing procedure.In the present invention, saved the UV processing procedure of carrying out after the hermetic electrolyte liquid hand-hole 136 in the habitual manufacture process.Saved to weld and improved the lower surface that plate is fixed to housing, with the habitual processing procedure of positive wire plate in the lead plate that is fixed for being connected the protective circuit module.The total height that this has reduced battery makes it possible to make elongated lithium secondary battery.
With negative wire plate 640b welding be fixed on the top of negative terminal 132, to connect the protective circuit module 150 of secondary cell.According to the structure of secondary cell, can change being connected of positive and negative utmost point lead plate 640a and 640b.
Fig. 9 be comprise sealing plate according to another embodiment of the present invention the perspective view of lithium secondary battery.The internal structure of this lithium secondary battery is identical with above-mentioned lithium secondary battery, has therefore omitted its detailed description.
As shown in Figure 9, sealing plate is according to another embodiment of the present invention formed the leader 740 of molding part 160.Molding part 160 usefulness foamed resins form, and are used in real protection protective circuit module, and cover plate and protective circuit module (not shown) are combined into one.Molding part 160 forms as follows: when making lithium secondary battery, leader 740 is welded and be fixed to cover plate.Leader 740 is cubes made from metal material, and defines its shape when moulded resin solidifies.When leader 740 welding and when being fixed to cover plate, as shown in Fig. 8 a, form sealing wire extraly at the periphery of electrolyte injecting hole 136, to form molding part 160.By this way, utilize the manufacture process that reduces quantity, hermetic electrolyte liquid hand-hole 136.Like this, firm and hard border is being fixed in the processing procedure of cover plate, is utilizing plate as sealing plate hermetic electrolyte liquid hand-hole, and need not any additional element.The quantity that this has reduced element and has made processing procedure.
Operation according to secondary cell of the present invention is as follows.
The anodal contact pin of protective circuit module is soldered to the opposite side of sealing plate 140, and the positive electrical of electrode assemblie 122 is connected to the anodal contact pin of protective circuit module.Like this, sealing plate 140 plays the effect of habitual lead plate (label 40 among Fig. 1) simultaneously.Therefore, the soldering process of inserting the soldering process of electrolyte injecting hole 136 and the lead plate of cover plate 131 being connected to the anodal contact pin of protective circuit module is combined into single processing procedure.
According to secondary cell of the present invention, the hermetic electrolyte liquid hand-hole by the top that sealing plate is welded to cover plate, thus prevent that electrolyte from flowing into welding portion.Owing in electrolyte injecting hole, do not produce slight gap, thus electrolyte prevented because capillarity flow into welding portion, and do not have the pin hole that electrolyte causes and be formed on welding portion.
Need not be pressed into electrolyte injecting hole to the pill of aluminium, and avoid because the distortion of the electrolyte injecting hole that the pill of aluminium that is pressed into causes.In electrolyte injecting hole, can not produce the gap, and prevent electrolyte leakage.
Because sealing plate is carried out the function of habitual lead plate simultaneously, therefore the soldering process of inserting electrolyte injecting hole and the soldering process that the lead plate of cover plate is connected to the anodal contact pin of protective circuit module are combined into single processing procedure.This has shortened manufacture process.
By reducing the processing procedure of quantity, sealed electrolyte injecting hole reliably.This has reduced the manufacturing time and the cost of lithium secondary battery, and has improved competitiveness of product.
Although illustrative purposes has illustrated one exemplary embodiment of the present invention for example,, it will be appreciated by those skilled in the art that and can carry out various modifications, increase and alternative, and do not break away from the scope and spirit of narrating in the appended claims of the present invention.
Claims (26)
1. secondary cell comprises:
The electrode assemblie that comprises the positive and negative pole plate;
Be used to hold the jar of this electrode assemblie and electrolyte;
Has the cover plate that is arranged in the electrolyte injecting hole on the one side;
Be suitable for sealing the open-topped cap assemblies of this jar; With
Be arranged on the upper surface of this cover plate to seal the sealing plate of this electrolyte injecting hole;
Wherein, the sealing plate is soldered to the upper surface of this cover plate, forms the welding portion greater than the periphery of electrolyte injecting hole;
Welding sealing plate makes the welding portion that forms in the welding process limit the ring of sealing at the periphery of electrolyte injecting hole;
And; this battery further comprises the protective circuit module that is electrically connected to this cap assemblies; wherein the sealing plate extends along the longitudinal direction, and a side of sealing plate is welded in this electrolyte injecting hole, and the electrode contact of this protective circuit module is connected to the opposite side of sealing plate.
2. secondary cell according to claim 1, wherein this welding portion comprises the annular shape of arranging around this electrolyte injecting hole.
3. secondary cell according to claim 2, the wherein inboard of the ring of this welding portion and this electrolyte injecting hole 0.1mm at least at interval.
4. secondary cell according to claim 1, wherein the sealing plate welds by Laser Welding.
5. secondary cell according to claim 4, wherein the scope of this depth of weld is 0.15mm to 0.50mm.
6. secondary cell according to claim 1, wherein the sealing plate comprises the nickel metallic plate.
7. secondary cell according to claim 1, wherein the sealing plate comprises the top nickel metallic plate that is attached to the bottom aluminium metal sheet.
8. secondary cell according to claim 2, wherein the sealing plate comprises the top nickel metallic plate that is attached to the bottom aluminium metal sheet.
9. secondary cell according to claim 1, wherein to have scope be 0.05 to 0.45mm thickness to the sealing plate.
10. secondary cell according to claim 1, wherein the sealing plate has the prolongation that protrudes upward from the lateral surfaces of its opposite side, and wherein the electrode contact of this protective circuit module is connected to this prolongation.
11. secondary cell according to claim 1, wherein this cover plate has the seat groove on the top that is arranged in this electrolyte injecting hole, and the size of this groove is corresponding to the size of sealing plate, thereby the sealing plate is placed on this groove.
12. secondary cell according to claim 1, wherein the sealing plate has corresponding to the outstanding downwards welded unit in the zone of this electrolyte injecting hole, and wherein the outside of this welded unit is soldered on this cover plate.
13. secondary cell according to claim 12, wherein this welded unit has diameter or the side circular or foursquare shape greater than the diameter of this electrolyte injecting hole.
14. secondary cell according to claim 1, wherein the sealing plate has the elastomer that is arranged on its lower surface, and this elastomeric external diameter is corresponding to the internal diameter of this electrolyte injecting hole.
15. secondary cell according to claim 14, wherein this elastomeric height is less than the thickness of this cover plate.
16. secondary cell according to claim 14, wherein this elastomer comprises the organic material of selecting from the group of being made up of polypropylene, polyphenylene sulfide, polyimides and Nylon 66.
17. a secondary cell comprises:
The electrode assemblie that comprises the positive and negative pole plate;
Be used to hold the jar of this electrode assemblie and electrolyte;
Has the cover plate that is arranged in the electrolyte injecting hole on the one side;
Be suitable for sealing the open-topped cap assemblies of this jar; With
Be arranged on the upper surface of this cover plate to seal the sealing plate of this electrolyte injecting hole;
Further comprise the protective circuit module that is electrically connected to this cap assemblies; wherein this protective circuit module has the positive and negative utmost point lead plate of the positive and negative utmost point that is connected to this secondary cell; and the sealing plate constitutes by one in the described lead plate and is fixed on the top of this electrolyte injecting hole, forms the welding portion greater than the periphery of this electrolyte injecting hole simultaneously.
18. secondary cell according to claim 17, wherein this lead plate comprises conductive plate.
19. secondary cell according to claim 17, wherein this negative wire plate is soldered and be fixed on the negative terminal of this secondary cell, and this positive wire plate is soldered and be fixed to this cover plate at the top of electrolyte injecting hole.
20. secondary cell according to claim 17, wherein this protective circuit module is disposed on the top of this cap assemblies.
21. secondary cell according to claim 17, wherein this welding portion is around the periphery of this electrolyte injecting hole.
22. secondary cell according to claim 17, wherein the inboard area of this welding portion is the twice at least of the cross-sectional area of this electrolyte injecting hole.
23. secondary cell according to claim 17, wherein this welding portion has the ring of at least two sealings, and in the described ring one is around another.
24. secondary cell according to claim 1, wherein chamfering is formed at the top of this electrolyte injecting hole.
25. secondary cell according to claim 1, wherein this electrode assemblie comprises the positive/negative plate of reeling with the dividing plate that places between the positive/negative plate.
26. secondary cell according to claim 1 further comprises the protective circuit module that is electrically connected to this cap assemblies.
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| KR1020040047999A KR100580777B1 (en) | 2004-06-25 | 2004-06-25 | Secondary Battery |
| KR20040047999 | 2004-06-25 | ||
| KR2004-0047999 | 2004-06-25 | ||
| KR20040090840 | 2004-11-09 | ||
| KR2004-0090840 | 2004-11-09 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1722507A CN1722507A (en) | 2006-01-18 |
| CN100428535C true CN100428535C (en) | 2008-10-22 |
Family
ID=35912580
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100800239A Expired - Fee Related CN100428535C (en) | 2004-06-25 | 2005-06-24 | Secondary battery |
Country Status (2)
| Country | Link |
|---|---|
| KR (1) | KR100580777B1 (en) |
| CN (1) | CN100428535C (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020143466A1 (en) * | 2019-01-07 | 2020-07-16 | 宁德时代新能源科技股份有限公司 | Secondary battery and battery module |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100627289B1 (en) * | 2004-11-09 | 2006-09-25 | 삼성에스디아이 주식회사 | Secondary battery and cap assembly thereof |
| KR101222228B1 (en) * | 2006-03-29 | 2013-01-15 | 삼성에스디아이 주식회사 | Lithium rechargeable battery and Method of making the same |
| JP4131553B2 (en) * | 2006-05-27 | 2008-08-13 | 日立マクセル株式会社 | Sealed battery |
| JP5120867B2 (en) * | 2006-05-30 | 2013-01-16 | 日立マクセルエナジー株式会社 | Sealed battery |
| KR100922474B1 (en) | 2007-01-18 | 2009-10-21 | 삼성에스디아이 주식회사 | Rechageable battery |
| KR101351723B1 (en) * | 2007-09-13 | 2014-01-15 | 삼성에스디아이 주식회사 | Secondary Battery |
| JP5224324B2 (en) * | 2007-10-12 | 2013-07-03 | 日立マクセル株式会社 | Sealed battery |
| CN101593824B (en) * | 2008-05-28 | 2013-07-31 | 深圳市比克电池有限公司 | Battery sealing plate and battery |
| KR100965684B1 (en) * | 2008-06-03 | 2010-06-24 | 삼성에스디아이 주식회사 | Battery Pack |
| KR20120049840A (en) * | 2009-08-05 | 2012-05-17 | 파나소닉 주식회사 | Hermetically sealed battery and method for manufacturing the same |
| JP5568639B2 (en) * | 2009-10-07 | 2014-08-06 | ブラックベリー リミテッド | Low noise battery |
| US8343651B2 (en) * | 2010-07-16 | 2013-01-01 | Samsung Sdi Co., Ltd. | Battery pack |
| US9159984B2 (en) * | 2011-11-25 | 2015-10-13 | Samsung Sdi Co., Ltd. | Rechargeable battery |
| KR101408047B1 (en) * | 2012-11-27 | 2014-06-17 | 삼성에스디아이 주식회사 | Rechargeable battery and rechargeable battery pack including the same |
| KR102273786B1 (en) | 2014-08-13 | 2021-07-06 | 삼성에스디아이 주식회사 | Rechargeable battery |
| KR102096430B1 (en) * | 2015-01-15 | 2020-04-02 | 엘에스엠트론 주식회사 | External terminal member of electric energy storage device having structure for preventing electrolyte leakage |
| US10396343B2 (en) * | 2015-05-05 | 2019-08-27 | Cps Technology Holdings Llc | Sealing patch for electrolyte fill hole |
| CN115863869B (en) * | 2021-09-27 | 2024-01-09 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery monomer, battery and electric equipment |
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| US11088398B2 (en) | 2019-01-07 | 2021-08-10 | Contemporary Amperex Technology Co., Limited | Secondary battery and battery module |
Also Published As
| Publication number | Publication date |
|---|---|
| KR20050123365A (en) | 2005-12-29 |
| KR100580777B1 (en) | 2006-05-15 |
| CN1722507A (en) | 2006-01-18 |
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