CN100583533C - Secondary battery - Google Patents

Secondary battery Download PDF

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Publication number
CN100583533C
CN100583533C CN200710079956A CN200710079956A CN100583533C CN 100583533 C CN100583533 C CN 100583533C CN 200710079956 A CN200710079956 A CN 200710079956A CN 200710079956 A CN200710079956 A CN 200710079956A CN 100583533 C CN100583533 C CN 100583533C
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CN
China
Prior art keywords
cover plate
plate
secondary cell
terminal
retainer
Prior art date
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Expired - Fee Related
Application number
CN200710079956A
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Chinese (zh)
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CN101030657A (en
Inventor
鱼和一
崔范国
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Samsung SDI Co Ltd
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Samsung SDI Co Ltd
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Publication of CN101030657A publication Critical patent/CN101030657A/en
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Publication of CN100583533C publication Critical patent/CN100583533C/en
Expired - Fee Related legal-status Critical Current
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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
    • 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
    • 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
    • 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
    • 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
    • H01M50/155—Lids or covers characterised by the material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50—Current conducting connections for cells or batteries
    • H01M50/572—Means for preventing undesired use or discharge
    • H01M50/574—Devices or arrangements for the interruption of current
    • H01M50/581—Devices or arrangements for the interruption of current in response to temperature
    • 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
    • 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

Abstract

The present invention provides a secondary battery includes a bare cell having an electrode assembly. The electrode assembly has cathode plates, anode plates and separators insulating the cathode plates from the anode plates. The secondary battery also includes a can housing the electrode assembly, the can having an opening for receiving the electrode assembly and a cap assembly having a cap plate sealing an opening of the can, the cap plate having a terminal through-hole, an electrode terminal inserted into the terminal through-hole, and a gasket insulating the electrode terminal from the terminal through-hole. A protective circuit board is coupled to the bare cell and a molding resin molds the protective circuit board with the bare cell. The gasket includes a coupling extension constraining the molding resin at the cap plate.

Description

Secondary cell
The cross reference of related application
The application requires the interests of two parts of korean patent applications, be respectively the 10-2006-18708 korean patent application of submitting on February 27th, 2006, with the 10-2006-103358 korean patent application of submitting on October 24th, 2006, two parts of applications are all submitted to Korea S Department of Intellectual Property, and their full content passes through reference in this merging.
Technical field
The present invention relates to secondary cell, more particularly, relate to a kind of secondary cell with improvement syndeton of the resin molded part that is overmolded on the plain battery.
Background technology
Along with reaching its maturity of video camera, portable phone, portable computer and other electronic equipments, at provide the secondary cell of energy to carry out a large amount of research for these equipment.Secondary cell can be, such as, nickel-cadmium cell, Ni-MH battery, nickel-zinc cell, lithium secondary battery and other similar batteries.In these batteries, lithium secondary battery can be recharged, but also compact conformation and have high power capacity.Lithium secondary battery is owing to the high-energy-density of its high working voltage and Unit Weight is widely used in the high-tech electronics apparatus field.
Lithium secondary battery can comprise plain battery, and this plain battery is inserted in the metal can by the electrode assemblie that will have minus plate, positive plate and dividing plate, injects the electrolyte in this jar also this jar sealing to be formed.As above formed plain battery is typically provided with the electrode terminal with this jar insulation.This electrode terminal forms an electrode of this lithium secondary battery, and this jar itself forms another electrode of this lithium secondary battery simultaneously.Therefore, the minus plate of described electrode assemblie links to each other with electrode terminal with this jar respectively with positive plate.
By this plain battery is linked to each other with safety device; and insert battery pack or utilize resin molded; and form this lithium secondary battery; described safety device for example is the protective circuit module (PCM) that comprises second class protection element and protective circuit plate, and wherein said second class protection element for example is bimetallic or positive temperature coefficient (PTC) device.The safety device of described lithium secondary battery links to each other with anode with negative electrode, increases owing to battery temperature for example or overcharge at cell voltage/when state's discharge increases sharply, prevent the danger that battery is blasted by the blocking-up electric current.
Conventional lithium secondary battery generally includes plain battery and is positioned at the protective circuit plate on described plain battery top.This lithium secondary battery also comprises the second class protection element that places this plain battery top.This second class protection element is formed at this plain battery sidepiece or top according to the structure of lithium secondary battery.
This plain battery comprises jar, electrode assemblie and cap assemblies.This jar is a canister, its open top, and have approximate hexahedral shape.This electrode assemblie comprises minus plate, dividing plate and positive plate, and they all together are arranged in described jar with electrolyte.When this electrode assemblie by jar open top insert jar in after, this open top utilizes described cap assemblies and sealed.
In having the lithium secondary battery of resin, described cap assemblies, second class protection element and protective circuit plate can be protected.This jar and resin molded part form the outside of lithium secondary battery, and described electrode terminal is exposed to the top of this resin molded part.
Yet when the lithium secondary battery of routine was assembled, the material of the resin molded part that battery protection assembly and this plain battery is fixedly connected was different with the material of this plain battery, and the contact area of this resin molded portion is narrow.Therefore, the bonding strength of inter-module is low, and if this resin molded part be not distorted, this resin molded part can not be placed in its molded state.Like this, lead plate be expanded usually or the reinforced structure of second class protection element by independent formation, cause higher manufacturing cost.
Summary of the invention
The invention provides a kind of secondary cell, this secondary cell comprises plain battery, and described plain battery has: electrode assemblie, and it comprises minus plate, positive plate and makes described minus plate and the dividing plate of described positive plate insulation; Be used to hold the jar of this electrode assemblie, this jar is provided with an opening, to be used for the placing said electrodes assembly; And cap assemblies.Described cap assemblies comprises: be used to seal the cover plate of described jar of opening, this cover plate has a terminal through-hole; Electrode terminal, it is inserted in the described terminal through-hole; And packing ring, it is used for described electrode terminal and the insulation of described terminal through-hole.This secondary cell further comprises: the protective circuit plate that is connected to described plain battery; With described protective circuit plate and described plain battery are carried out molded moulded resin.
Described packing ring comprises the connection extension, to be used for that described moulded resin is limited in described plain battery.This connecting portion can be retainer (stopper), and itself and described packing ring form and extend radially from this packing ring.Described retainer can comprise horizontal component, and this horizontal component is roughly parallel to described cover plate and extends, and this horizontal component can be positioned at described cover plate on the outside.Described retainer can further comprise supporting leg, and this supporting leg extends to described cover plate vertically from the horizontal component of described retainer, and described retainer can outwards coming to a point with for example shape level and smooth or ladder from internal diameter towards the outside at described cover plate gradually.Described retainer can comprise a plurality of grooves, and described a plurality of grooves are suitable for filling with described moulded resin.
According to the present invention, provide another embodiment of the present invention.This secondary cell has electrode terminal, and this electrode terminal comprises connecting portion, uses and described moulded resin is limited in the described plain battery.Described electrode terminal can comprise: head, and it is electrically connected to described protective circuit portion, and described retainer is formed on this head; With the main body that forms with described head, this main body links to each other with described cover plate, and is provided with insulating washer between described electrode terminal and described cover plate.The diameter of described retainer can be greater than the diameter of described electrode terminal head.Described retainer can comprise step and/or a plurality of groove, and it is described resin molded to be used for further restriction.
Description of drawings
Fig. 1 is the cutaway view of the secondary cell of one exemplary embodiment according to the present invention;
Fig. 2 is a vertical view of removing the plain battery of resin molded part;
Fig. 3,4,5,6 and 7 is partial sectional views of the gasket construction of one exemplary embodiment according to the present invention;
Fig. 8 is the cutaway view on the secondary cell top of another one exemplary embodiment according to the present invention;
Fig. 9 is the perspective view of the electrode terminal of the secondary cell among Fig. 8;
Figure 10,11 and 12 is partial sectional views of the one exemplary embodiment of electrode terminal of the present invention.
Embodiment
As shown in Figure 1, the lithium secondary battery 100 of one exemplary embodiment comprises according to the present invention: plain battery 110; With the protective circuit plate 150 that is connected to this plain battery.
Plain battery 110 comprises: jar 120; Be contained in the electrode assemblie 122 in the jar 120; With the cap assemblies 130 that is used for hermetically sealed can 120.And second class protection element 140 is formed at the top of cap assemblies 130.
Jar 120 can be the metal can of approximate hexahedral shape, and itself can be used as terminal.The top of jar 120 is provided with opening, and electrode assemblie 122 can insert from this opening.
Electrode assemblie 122 comprises minus plate 123, positive plate 125 and dividing plate 124.When minus plate 123, positive plate 125 and after placing dividing plate 124 between the two to pile up, they can be wound into soft roll-shape.Cathode connection sheet 126 is welded on the minus plate 123, and an end of cathode connection sheet 126 stretches out from electrode assemblie 122.Anode lug 127 is welded on the positive plate 125, and an end of anode lug 127 stretches out from electrode assemblie 122.
Cap assemblies 130 comprises cover plate 131, electrode terminal 132, insulation board 134 and terminal board 135.
Cover plate 131 can be the metallic plate that forms corresponding to the opening of jar 120.Electrode terminal 132, anode terminal for example inserts cover plate 131 and also is attached thereto.Anode lug 127 can be welded on the electrode terminal 132 and be electrically connected with it.In addition, cathode connection sheet 126 is soldered on the cover plate 131.Terminal through-hole 131a is formed at the middle part of cover plate 131, and electrode terminal 132 can pass from terminal through-hole 131a, electrolyte entrance 131b can be formed at described terminal through-hole near, and this electrolyte entrance 131b utilizes stopper 137 to seal.
In order to make anode terminal 132 and cover plate 131 insulation, between them, be provided with tubular gasket 133.And the terminal board 135 that is connected with the bottom electrical of anode terminal 132 is formed at the lower surface of cover plate 131, and insulation board 134 is set to terminal board 135 and anode terminal 132 with respect to cover plate 131 electric insulations.Insulation board 134 can be insulation board or the band of being made by for example polypropylene (PP), polyphenylene sulfide (PPS) or the polyimides (PI) of electrolyte resistance.
Selectively, minus plate 123 and positive plate 125 can be arranged to, and electrode terminal 132 is a cathode terminal, and cover plate 131 and jar 120 are anode terminal.
In Fig. 1, second class protection element 140 is connected between anode terminal 132 and the protective circuit plate 150.This second class protection element 140 can be PTC element, bimetallic or thermo-fuse.When the PTC element was used as second class protection element 140, insulating tape was winding to this second class protection component ambient, thereby it is insulated mutually with cover plate 131 and miscellaneous part.
Protective circuit plate 150 forms by on the printed circuit board (PCB) (PCB) that is formed with wiring diagram in the above a plurality of electronic devices and components being set, and is used to control all operations that comprises charging and discharge of this lithium secondary battery.Protective circuit plate 150 is electrically connected with the electrode terminal 132 and the jar 120 of plain battery 110 by lead plate 154,156, and is electrically connected with electrode assemblie 122.With this lithium secondary battery 100 and the electrode terminal 152 that the external device (ED) (not shown) electrically contacts, can be formed on this protective circuit plate 150.
By this lithium secondary battery 100 is molded, cap assemblies 130, second class protection element 140 and protective circuit plate 150 are protected with resin.Jar 120 and resin molded part 160 form the outside of these lithium secondary batteries 100, so that the electrode terminal 152 of protective circuit plate 150 exposes by this resin molded part 160.
Referring now to Fig. 1 and Fig. 2, retainer 133a stretches out from packing ring 133, so that resin molded part 160 firmly is connected with metal cover board 131.This retainer 133a stretches out from packing ring 133 also can be integrally moulded with this packing ring.
In an one exemplary embodiment, retainer 133a flatly is formed at an end of packing ring 133, promptly along the direction that is parallel to cover plate 131.Therefore, but potting resin in the space between retainer 133a and cover plate 131, thus increase the power that is connected between cover plate 131 and the resin molded part 160.
In an one exemplary embodiment, described resin molded part 160 is injected into the space between cover plate 131 and the retainer 133a and is cured.Because second class protection element 140 and protective circuit plate 150 are by resin molded part 160 protections, and this resin molded part connects securely by retainer 133a, so this second class protection element 140 also is firmly connected on the cover plate 131.
Fig. 3,4,5,6 and 7 is the partial sectional view according to secondary cell one exemplary embodiment of the present invention.
As shown in Figure 3, packing ring 233 constitutes by forming a plurality of groove 233b from the teeth outwards, and when this lithium secondary battery was assembled, described surface contacted with described resin molded part.Groove 233b also can be formed on the outer surface of retainer 233a of the packing ring 233 that stretches out from packing ring 233 levels.When lithium secondary battery is assembled, is filled with resin among the groove 233b, thereby between described resin molded part and cover plate 131, provides fastening being connected.
As shown in Figure 4, packing ring 333 can constitute like this, and promptly it comprises: the retainer 333a that vertically stretches out from packing ring 333; With the supporting leg 333c that vertically stretches out from this retainer 333a.This supporting leg 333c can be certain at interval with cover plate 131 distance so that resin can flow into the space between this supporting leg and the retainer 333a.Packing ring 333 has improved bonding strength, thereby greatly reduces the possibility that resin molded part 160 is separated with cover plate 131.And this resin molded part is also littler with respect to cover plate 131 possibilities separated or distortion.
As shown in Figure 5, packing ring 433 comprises a retainer 433d, and this retainer 433d outwards comes to a point with stairstepping gradually from first end to the second end of described packing ring.Identical with the reason of above-mentioned packing ring, packing ring 433 has improved the bonding strength between described resin molded part and the cover plate 131.
In cutaway view shown in Figure 6, the head 533a of packing ring 533 outwards comes to a point with level and smooth shape gradually from first end to the second end.Space between this head 533a and the cover plate 131 is filled with described resin molded part, thereby increases the connection power of this resin molded part with respect to cover plate 131.
In packing ring shown in Figure 7 633, extend to the upper surface top of cover plate 131 with the integrally moulded main body 633b of the head 633a of packing ring 633.Like this, the head 633a and the space between the cover plate 131 of described packing ring can be filled with described resin molded part, thereby increase the connection power of this resin molded part with respect to cover plate 131.
With reference to Fig. 8 and Fig. 9, secondary cell according to another one exemplary embodiment comprises electrode assemblie 240, this electrode assemblie 240 by pile up the minus plate 210 that has cathode connection sheet 250, the positive plate 220 that has anode lug 260 and dividing plate 230 and after the plate that is piled up of reeling form.This secondary cell further comprises: housing 200, and it is used to hold described electrode assemblie 240, and at one end is provided with opening; Cap assemblies 300, it is used for the described opening of seal casinghousing 200, and this cap assemblies is electrically connected with cathode connection sheet 250 and anode lug 260; Protective circuit parts 400, it is positioned on the printed circuit board (PCB), and this printed circuit board (PCB) has circuit and the electric terminal that is used for safety device, and these protective circuit parts are electrically connected with cap assemblies 300; With resin molded part 500, its resin by fusing connects the part of described cap assemblies and the part of protective circuit parts.
Minus plate 210 is provided with the cathode active material layer that is formed on the cathode current collector body, and positive plate 220 is provided with the anode active material layer that is formed on the anode current collector body.Dividing plate 230 is arranged between described minus plate and the positive plate, to prevent the short circuit between the battery lead plate 210,220 and ion is moved.Cathode connection sheet 250 combines with minus plate 230 and is electrically connected with cover plate 350, and anode lug 260 combines with positive plate 220 and is electrically connected with electrode terminal 310.
More particularly, described cathode active material layer can comprise: the stratified mixture that contains lithium; Be used to improve the adhesive of connection power; Be used to improve conductive conductive materials.Described cathode current collector body can be for aluminum, and not only as the path of the electric charge that is produced in the described cathode active material layer, and as the carrier of described cathode active material layer.Described cathode active material layer can be attached on the wide surface of described cathode current collector body, and the uncoated part of negative electrode that does not have a cathode active material layer is formed at a side of described minus plate.This cathode connection sheet 250 can combine with the uncoated part of this negative electrode.
In addition, positive plate 220 comprises anode current collector body and anode active material layer.This anode active material layer can comprise: hard carbon or graphite; And be used to improve between the active material particle adhesive that connects power.This anode current collector body can be aluminum, and not only is used as the path of the electric charge that is produced in the described anode active material layer, and is used as the carrier of described anode active material layer.This anode active material layer is attached on the wide surface of described positive plate 220, and the uncoated part of anode that does not have an anode active material layer is formed at a side of described positive plate.This anode lug 260 can combine with the uncoated part of this anode.
Described dividing plate 230 can place between minus plate 210 and the positive plate 220, thereby this minus plate 210 is insulated mutually with positive plate 220.Dividing plate 230 can be made by polyethylene (PE) or polypropylene (PP), but the material of described dividing plate is not limited thereto.Dividing plate 230 can include electrolyte and can be the form of liquid phase or gel.
Cathode connection sheet 250 and anode lug 260 be in order to being electrically connected electrode assemblie 240 with the electric terminal of external device (ED), and combine with the uncoated part of anode of uncoated part of the negative electrode of minus plate 210 and positive plate 220.Cathode connection sheet 250 and anode lug 260 can be by aluminum or aluminum alloy, and perhaps nickel or nickel alloy are made.The material of but described cathode connection sheet and anode lug is not limited thereto.
Housing 200 accommodates electrode assemblie 240, insulation shell 320 and electrolyte.This housing is roughly hexahedral shape, and can be aluminum, but the material of this housing is not limited thereto.Cover plate 350 can weld or hot melt is incorporated on this housing with its sealing.
Cap assemblies 300 comprises: electrode terminal 310, and it is electrically connected to anode lug 260 the anode tap plate and has a retainer; Insulation shell 320; Terminal board 330, it is electrically connected to electrode terminal 310; Insulation board 340, its outer surface with terminal board 330 insulate, and is provided with the hole that is used for electrode terminal 310 is connected to terminal board 330; Cover plate 350; Packing ring 360, it is with electrode terminal 310 and cover plate 350 insulation; With electrolyte entrance stopper 370, it is with 352 sealings of the electrolyte entrance on the cover plate 350.
Electrode terminal 310 and the packing ring 360 that this electrode terminal is insulated can be inserted in the mider hole of cover plate 350.Insulation shell 320 can separate cathode connection sheet 250 and anode lug 260, is short-circuited between minus plate 210 and the positive plate 220 preventing.Terminal board 330 can link to each other with electrode terminal 310 and anode lug 260.Insulation board 340 can be the shape that this terminal board 330 is surrounded.
The electrolyte entrance 352 that electrolyte is injected is positioned on the cover plate 350, and can with welding or other fixed forms this electrolyte entrance be sealed by electrolyte entrance stopper 370.Cover plate 350 also can comprise safe ventilation mouth (not shown), with the blast that prevents that this lithium secondary battery from taking place owing to the increase of internal pressure.
Protective circuit parts 400 are positioned at the top of cover plate 350, and control all operations that comprises charge/discharge of this secondary cell.These protective circuit parts 400 comprise protective circuit plate 410, and this protective circuit plate 410 is formed with on the printed circuit board (PCB) of wiring diagram above being arranged on a plurality of electronic devices and components.Protective circuit plate 410 is electrically connected with anode tap plate 440 and cathode leg plate 430.This anode tap plate 440 links to each other electrode terminal 310 with protective circuit plate 410.The insulator (not shown) can be arranged between anode tap plate 440 and the cover plate 350 with this two insulation.In addition, cathode leg plate 430 is electrically connected cover plate 350 with protective circuit plate 410.Second class protection element 420 can be formed between anode tap plate 440 and the printed panel 410, and can be PTC element, bimetallic or thermo-fuse.When the PTC element was used as the second class protection element, insulating tape can be wound on the exterior circumferential of this PTC element, thereby itself and cover plate 350 are insulated.
Resin molded part 500 is carried out molded formation by utilizing resin with part protective circuit parts 400 and partial cover plate 350.Electrode terminal 310 can comprise the coupling part, and described resin molded part is limited with respect to cover plate 350 in this coupling part.For example, electrode terminal 310 can form the form that its head 311 stretches out from packing ring 360.
Electrode terminal 310 comprises head 311 and main body 312.This head 311 can be tabular, and its surface area can be greater than the surface area of packing ring 360.Main body 312 can be molded integratedly with head 311.
Between head 311 and cover plate 350, can produce the space, in this space, to fill described resin molded part.Like this, the connection power that resin molded part 500 is limited on the cover plate 350 can be improved.
According to another one exemplary embodiment, described resin molded part can form retainer and be restricted by the head at electrode terminal.With reference to Figure 10, electrode terminal 310 ' comprises retainer 314 ', this retainer 314 ' the be provided with head 311 ' of diameter greater than packing ring 360.Utilize this retainer 314 ', resin molded part 500 can be restricted.As mentioned above, the retainer 314 ' that is formed on the electrode terminal 310 is used for the resin molded part 500 of restricted part, and this resin molded part 500 links to each other with cover plate 350 securely.
According to Figure 11, be the further described resin molded part of restriction, electrode terminal 310 " retainer 314 " be provided with step 316.As mentioned above, this retainer 314 " be provided with step 312, like this, cover plate 350 improves with the power that is connected between the resin molded part 500.
According to Figure 12, electrode terminal 310 " ' head 311 " ' has that retainer 314 is arranged " diameter of ' and a plurality of groove 318, and this retainer 314 " ' is greater than the diameter of packing ring 360, and a plurality of groove 318 is formed on the surface of described retainer.As mentioned above, retainer 314 " ' improved the vertical power of connection between cover plate 310 and the resin molded part 500.Retainer 314 " ' on described groove can be formed on the lower surface and peripheral surface thereof of this retainer.The size of this secondary cell and the structure of described cap assemblies and protective circuit parts are depended in the quantity of described groove and position.
As mentioned above, provide a kind of secondary cell, it has improved gasket construction, and this gasket construction is used to make electrode terminal and cover plate insulation.Therefore, the bonding strength of the described resin molded part of formation outward appearance improves.
Although one exemplary embodiment of the present invention is described for the purpose of example, but it will be appreciated by those skilled in the art that, under situation about not departing from the scope of the present invention with spirit, but modifications and variations of the present invention are, and all such modifications all will be included in the description of claims with changing.

Claims (16)

1, a kind of secondary cell comprises:
Plain battery, it comprises:
Electrode assemblie, it comprises minus plate, positive plate and with the dividing plate of described minus plate and the insulation of described positive plate;
Jar, it is used to hold described electrode assemblie, and this jar has the opening that is used for the placing said electrodes assembly; With
Cap assemblies, it comprises:
Cover plate, it is used to seal described jar opening, and this cover plate has terminal through-hole;
Electrode terminal, it is inserted into described terminal through-hole; With
Packing ring, it is used for described electrode terminal and the insulation of described terminal through-hole;
The protective circuit plate, it is connected to described plain battery; With
Moulded resin, it is used for carrying out molded to described protective circuit plate and described plain battery;
Wherein said packing ring comprises the connection extension, to be used for that described moulded resin is limited in described cover plate.
2, secondary cell as claimed in claim 1, wherein said connection extension comprises retainer, and this retainer and described packing ring forms and extending radially out along described packing ring.
3, secondary cell as claimed in claim 2, wherein said retainer comprises horizontal component, and this horizontal component is roughly parallel to described cover plate and extends.
4, secondary cell as claimed in claim 3, the horizontal component of wherein said packing ring be positioned at described cover plate on the outside.
5, secondary cell as claimed in claim 3, wherein said retainer further comprises supporting leg, this supporting leg vertically extends to described cover plate from the horizontal component of described retainer.
6, secondary cell as claimed in claim 1, wherein said packing ring comprises a plurality of grooves, and described a plurality of groove is suitable for filling with described moulded resin.
7, secondary cell as claimed in claim 2, wherein said retainer outwards and gradually comes to a point from internal diameter towards the outside described cover plate.
8, secondary cell as claimed in claim 2, wherein said retainer is stairstepping from second diameter towards the far-end in the outside towards first diameter of the near-end in the outside to this described cover plate of described cover plate, and this second diameter is greater than this first diameter.
9, a kind of secondary cell comprises:
Plain battery, it comprises:
Electrode assemblie, it comprises minus plate, positive plate and with the dividing plate of described minus plate and the insulation of described positive plate;
Jar, it is used to hold described electrode assemblie, and this jar has the opening that is used for the placing said electrodes assembly; With
Cap assemblies, it comprises:
Cover plate, it is used to seal described jar opening, and this cover plate has terminal through-hole;
Electrode terminal, it is inserted into described terminal through-hole; With
Packing ring, it is used for described electrode terminal and the insulation of described terminal through-hole;
The protective circuit plate, it is electrically connected to described electrode terminal and described cover plate; With
Moulded resin, it is used for carrying out molded to described protective circuit plate and described plain battery;
Wherein said electrode terminal comprises the connection extension, to be used for that described moulded resin is limited in described cover plate.
10, secondary cell as claimed in claim 9, wherein said connection extension is a retainer, and this retainer and described electrode terminal form and stretch out from described electrode terminal.
11, secondary cell as claimed in claim 10, wherein said electrode terminal comprises:
Head, it is electrically connected to described protective circuit parts, and described retainer is formed on this head; With
Main body, it forms with described head and links to each other with described cover plate, and is provided with insulating washer between described electrode terminal and described cover plate.
12, secondary cell as claimed in claim 11, the diameter of wherein said retainer is greater than the diameter of the head of described electrode terminal.
13, secondary cell as claimed in claim 12, wherein said retainer comprises step, to be used for further limiting described moulded resin.
14, secondary cell as claimed in claim 12, wherein said retainer comprises a plurality of grooves, to be used for further limiting described moulded resin.
15, a kind of packing ring that is used for secondary cell, this secondary cell comprises: plain battery; The protective circuit plate, it is electrically connected to described plain battery; And moulded resin, it is used for described protective circuit plate and described plain battery are carried out molded, and wherein said plain battery comprises: electrode assemblie; Be used to hold the jar of described electrode assemblie, this jar has opening, and described electrode assemblie can insert by this opening; With the cover plate that is used to seal described opening, this cover plate has terminal through-hole, and this packing ring comprises:
Washer body, it is suitable for being arranged between described electrode terminal and the described terminal through-hole; With
The coupling part, it stretches out from described washer body;
Wherein said coupling part is suitable for described moulded resin is limited on the described cover plate.
16, a kind of electrode terminal that is used for secondary cell, this secondary cell comprises: plain battery; The protective circuit plate, it is electrically connected to described plain battery; And moulded resin, it is used for described protective circuit plate and described plain battery are carried out molded, and wherein said plain battery comprises: electrode assemblie; Be used to hold the jar of described electrode assemblie, this jar has opening, and described electrode assemblie can insert by this opening; With the cover plate that is used to seal described opening, this cover plate has terminal through-hole, and this electrode terminal comprises:
Head, it is electrically connected to described protective circuit plate;
Main body, itself and described head form, and link to each other with described cover plate; With
Connect extension, it is positioned on the described head, and is suitable for described moulded resin is limited on the described cover plate.
CN200710079956A 2006-02-27 2007-02-27 Secondary battery Expired - Fee Related CN100583533C (en)

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KR1020060018708A KR100795679B1 (en) 2006-02-27 2006-02-27 Secondary battary
KR1020060018708 2006-02-27
KR1020060103358 2006-10-24

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KR100867928B1 (en) * 2007-09-27 2008-11-10 삼성에스디아이 주식회사 Protection circuit module and battery pack using the same
KR100954029B1 (en) * 2007-11-12 2010-04-20 삼성에스디아이 주식회사 Protection Circuit Module for rechargeable battery and rechargeable battery using the PCM
KR101116492B1 (en) * 2010-02-12 2012-02-27 에스비리모티브 주식회사 Rechargeable battery
CN103931016B (en) * 2011-11-11 2016-08-17 三洋电机株式会社 Set of cells
US9570719B2 (en) * 2013-05-22 2017-02-14 Samsung Sdi Co., Ltd. Secondary battery
HK1195446A2 (en) * 2014-08-08 2014-12-19 Minwa Energy Lithium Battery Technology Co Ltd A lithium-ion batteries and its charging and discharging methods
KR102275333B1 (en) * 2014-10-30 2021-07-09 삼성에스디아이 주식회사 Rechargeable battery
KR102275423B1 (en) 2015-01-28 2021-07-09 삼성에스디아이 주식회사 Secondary Battery
KR102519439B1 (en) * 2015-11-04 2023-04-07 삼성에스디아이 주식회사 Rechargeable battery

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KR20070088894A (en) 2007-08-30
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