CN202601738U - Cover plate component and battery comprising cover plate component - Google Patents
Cover plate component and battery comprising cover plate component Download PDFInfo
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- CN202601738U CN202601738U CN2012201701433U CN201220170143U CN202601738U CN 202601738 U CN202601738 U CN 202601738U CN 2012201701433 U CN2012201701433 U CN 2012201701433U CN 201220170143 U CN201220170143 U CN 201220170143U CN 202601738 U CN202601738 U CN 202601738U
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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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Abstract
The utility model provides a cover plate component and a battery containing the cover plate component, wherein the cover plate component comprises a cover plate body, a cover plate connecting element and an electrode terminal; the cover plate connecting element is provided with an electrode hole which runs through the cover plate connecting element; the electrode terminal passes through the electrode hole and is in insulation and sealing with the cover plate connecting element; the cover plate body is provided with a through hole running through the cover plate body; the electrode terminal passes through the through hole and leads current out; and the cover plate connecting element and the cover plate body are connected in a seal mode. Through the technical scheme provided by the utility model, the production efficiency can be improved, the manufacturing cost can be lowered, especially the yield is high, and the safety performance is good; meanwhile, the cover plate component provided by the utility model is stable in structure connection, has a good seal performance, and lays a foundation for the actual application and development of the battery in ceramic seal.
Description
Technical field
The utility model relates to a kind of cover plate assembly and contains the battery of this cover plate assembly.
Background technology
Lithium ion battery belongs to the important a kind of product of new forms of energy, has advantages such as pollution-free, that capacity is high, have extended cycle life.Fields such as present lithium-ion-power cell, lithium ion instrument battery, the network energy.Lithium ion battery is after positive plate, barrier film, negative plate are reeled or be stacked to pole piece, and pole piece is put into the cavity that battery container and seal cover board form, and inner injection electrolyte obtains after step such as changing into through sealing.And seal cover board is as the indispensable parts assembly of lithium battery seal; Its fail safe, sealing, resistance to ag(e)ing, insulating properties and in battery occupation space size etc. have very significance; Cover plate assembly takies certain cost of whole lithium battery in addition, provides its production efficiency, rate of finished products largely to reduce cost.
At present; Lithium ion battery mainly adopts plastic injection-moulded reach sealing and insulation; Cover plate main body all is carrying out injection moulding with anodal exit, negative pole exit and combining of integral type; So not only cause the moulding volume big, occur during injection moulding inaccessible each position injection moulding seal the problem that consistency is fine, fraction defective is high, production efficiency is also low, and metalwork need pass through certain temperature during injection moulding; Be prone to cause metalwork oxidized and contaminated, the integral cap panel material problems such as deliquescing that change.In addition, use be that the injection-moulded plastic material plays the sealed insulation effect, the plastics ageing-resistant performance is not high, compactness is low, and is combustible material, useful life is shorter, security performance is lower.
Also have at present research that pottery is used for the insulated enclosure of cover plate as seal, cover plate and pottery are welded, positive pole is drawn post, negative pole draws post and pottery welds; With the cover plate insulated enclosure, but cover plate is higher with the welding temperature of pottery, and is bigger to the cover plate materials influence; Problems such as deliquescing takes place cover plate easily, intensity reduces, and production efficiency is low, and cover plate is big parts; There are various installing components on the cover plate; There is bigger influence in the distortion of cover plate to the performance of cover plate, particularly influences being tightly connected of follow-up and battery container, and preparation increases with the technology difficulty of the cover plate assembly of battery container coupling; The battery fraction defective increases, and has influenced its practical application and development.
Summary of the invention
The utility model is existing with the cover plate assembly difficulty preparation of pottery as seal, the technical problem that fraction defective is high in order to solve.A kind of easy preparation is provided, more has been prone to large-scale production, and not deformation during preparation, yield is high, more is prone to the cover plate assembly of coupling with battery container and contains the battery of this cover plate assembly.
First purpose of the utility model provides a kind of cover plate assembly, comprises cover board body, cover plate connector and electrode terminal; Have the electrode hole that runs through the cover plate connector on the cover plate connector, electrode terminal passes insulated enclosure between electrode hole and cover plate connector; Have the through hole that runs through cover board body on the cover board body, electrode terminal passes said through hole projected current; Cover plate connector and cover board body are tightly connected.
Preferably, the cover plate connector is arranged in above-mentioned through hole.
Preferably, the cover plate connector comprises a mounting groove, and above-mentioned electrode hole runs through the mounting groove bottom.
Preferably, prolong periphery on the mounting groove and comprise turnup structure, turnup structure is connected with cover board body.
Further preferred, through hole is a stepped hole, and turnup structure is positioned on the step of stepped hole and is connected with cover plate.
Preferably, the cell wall of mounting groove is connected with the smooth transition that is connected to of mounting groove bottom, and the cell wall of mounting groove is connected to smooth transition with turnup structure and is connected.Smooth transition is connected to and well known to a person skilled in the art various connections, and for example arc connects.The cell wall of mounting groove, mounting groove bottom and turnup structure can be formed in one.
Preferably, clamping ceramic seal spare insulated enclosure between electrode terminal and the cover plate connector.
Preferably, ceramic seal spare center is formed with mesopore, and electrode terminal passes above-mentioned mesopore.
Preferably, ceramic seal spare comprises the connecting portion that the sealing that is arranged in the electrode hole and external diameter are connected with the cover plate connector greater than sealing.
Preferably, the cover plate connector comprises a mounting groove, and connecting portion is in mounting groove.
Preferably, be provided with the first metal solder layer between the inner surface of connecting portion and mounting groove bottom, the first metal solder layer is through form through the soldering welding after being metallized in the connecting portion surface again and between the inner surface of mounting groove bottom.
Perhaps preferred, also be provided with the transition metal ring plate between the inner surface of connecting portion and mounting groove bottom.
Preferably, electrode terminal comprises pole and polar cap, and wherein, the two ends of pole are first end and the second end, and polar cap is positioned at the first end of pole; Pole is arranged in the mesopore of ceramic seal spare, and the second end extends ceramic seal spare.
Preferably, ceramic seal spare comprises the connecting portion that the sealing that is arranged in the electrode hole and external diameter are connected with the cover plate connector greater than sealing; Polar cap is connected with the connecting portion outer face.
Further preferred, be provided with the second metal solder layer between polar cap and the connecting portion outer face, the second metal solder layer is through form through the soldering welding after being metallized in the connecting portion outer face again and between the polar cap.
Perhaps further preferred, also be provided with the transition metal ring plate between polar cap and the connecting portion outer face.
Preferably, the transition metal ring plate is the kovar alloy sheet.The transition metal ring plate that is provided with between the inner surface of connecting portion and mounting groove bottom can be aluminium, aluminium alloy, kovar alloy or stainless steel substrates; The transition metal ring plate that is provided with between polar cap and the connecting portion outer face is when electrode terminal can be aluminium, aluminium alloy or kovar alloy sheet when being anodal, when electrode terminal can be copper, copper alloy or kovar alloy sheet during for negative pole.
Preferably, also be provided with buffer structure on the polar cap inner surface, be positioned between polar cap and connecting portion outer face.
Preferably, buffer structure is a support ring.
Preferably, extend on the second end of pole of ceramic seal spare and also be connected with electrode connecting piece.
Further preferred, be provided with sealing ring between cover plate connector and electrode connecting piece.
Preferably, the number of electrode terminal is a plurality of, has a plurality of electrode holes on the cover plate connector.
Preferably, the number of electrode terminal is a plurality of, and the number of said cover plate connector is a plurality of.
Another order of the utility model provides a kind of battery, comprising: cover plate assembly, battery container, pole piece and electrolyte, pole piece and electrolyte level are in battery container, and cover plate assembly and battery container are tightly connected; The inside battery electric current is drawn in electrode terminal on the said cover plate assembly and pole piece conducting, and said cover plate assembly is above-mentioned cover plate assembly.
The utility model adopts earlier electrode terminal with after cover plate connector insulated enclosure is connected, passes through the cover plate connector again and is connected with cover board body, and owing to the cover plate connector can adopt small construction, this small construction is not yielding under hot conditionss such as welding; Be prone to clean, particularly, with ceramic seal spare high-temperature soldering the time, not yielding to the more excellent ceramic seal structure of the present invention; And also capable of washing behind the sintering, conveniently be easy to get, again with cover plate connector and cover board body welding; Performance is more excellent, and mainly acting as of cover plate connector is sealedly connected ceramic seal spare, electrode terminal and cover board body, therefore its shape there is not special demands yet; Volume is little, and amorphism specific (special) requirements and special parts can experience high temperature; High temperature distortion itself is also little, can not influence the sealing of battery, will weld with the cover plate connector and the cover board body of the same material of cover board body; Realize easily, and the nothings such as intensity of cover board body influenced that the technical scheme of the utility model can be enhanced productivity; It is high to reduce cost of manufacture, particularly yield, and security performance is good; Simultaneously the cover plate assembly structure of the utility model connects firmly, and good seal performance is for the practical application and the development of the battery of ceramic seal are laid a good foundation.
Description of drawings
Fig. 1 is the cross-sectional view that electrode terminal, seal, the cover plate connector of the embodiment of the utility model assembled.
Fig. 2 is the cross-sectional view of cover plate assembly of the embodiment of the utility model.
Fig. 3 is the cross-sectional view that electrode connects the cover plate assembly of pole piece that is connected with of the embodiment of the utility model.
Fig. 4 is the perspective view of cover plate connector of the embodiment of the utility model.
Fig. 5 is the perspective view of electrode terminal of the embodiment of the utility model.
Fig. 6 is the perspective view of ceramic seal spare of the embodiment of the utility model.
Fig. 7 is the cross-sectional view of cover board body of the embodiment of the utility model.
Fig. 8 is the plan structure sketch map of cover board body of the embodiment of the utility model.
Embodiment
In order to make the utility model technical problem to be solved, technical scheme and beneficial effect clearer,, the utility model is further elaborated below in conjunction with accompanying drawing and embodiment.Should be appreciated that specific embodiment described herein only in order to explanation the utility model, and be not used in qualification the utility model.
Embodiment
Embodiment to the utility model is elaborated with reference to the accompanying drawings.Among this paper, same reference numerals is represented the same composition part.And; Should be appreciated that in the description of the utility model, " on ", relative bearing term such as D score; Each parts and the relative position of part in the cutaway view of cover plate assembly shown in Figure 1 thereof in the expression cover plate assembly are so that describe each parts and part thereof; But and be not used in these parts and part thereof actual installation and the position relation in lithium ion battery limited, it maybe be inequality with the actual installation situation, is not limited to the scope of the utility model.
The cover plate assembly of the utility model is used for the sealing of battery, is used for the sealing of lithium ion battery more, high-power lithium ion battery especially, for example: the sealing of lithium-ion-power cell, lithium-ion energy storage battery.Skilled in the art will recognize that lithium ion battery mainly comprises: the housing of at least one end opening, be positioned over the pole piece in the housing and be contained in the electrolyte in the housing.For fear of spilling of electrolyte, adopt cover plate assembly that the openend of housing is sealed.Wherein, housing is generally aluminum hull or box hat, is used to place pole piece and holds electrolyte; Opening can from battery one end projected current, also can be two for an i.e. end opening; Be both ends open, from the two ends projected current of battery, the position of opening is not restriction also; Can be from the minor face opening, pole piece is directly vertically put into battery container, and promptly the opening exposed portions serve is the pole piece end of projected current; Also can be from growing the limit opening, the pole piece Direct Water keeps flat in the battery container, and promptly the opening exposed portions serve is the coiling circular arc limit of coiling pole piece.Said pole piece is stacked successively or reel and to form by positive plate, barrier film, negative plate, and the structure of pole piece and manufacture method can be passed through existing techniques in realizing, do not do at this and give unnecessary details.
Present embodiment specifically describes cover plate assembly, and as shown in Figure 1, cover plate assembly comprises cover board body 1, cover plate connector 2 and electrode terminal 3.
Like accompanying drawing 2,7, shown in 8, cover board body 1 is used for the sealing-in battery container, generally is provided with the through hole 11 that runs through cover board body 1 on the cover board body 1; Be used to draw the inside battery electric current, number the utility model of through hole 11 is restriction not, can design according to the number of the electrode terminal that is used for projected current 3 that designs; For example when battery is an end projected current; Can contain a through hole 11 on the cover board body 1, be used for the passing of electrode terminal 3 of an a kind of polarity, at this moment; The electrode terminal 3 of another polarity for example lug can be connected projected current with housing, and the electrode terminal 3 that generally passes cover board body 1 this moment generally needs insulation processing.Also can contain a plurality of through holes 11 on the cover board body 1; Be used for the passing of electrode terminal 3 or the passing of the electrode terminal 3 of a plurality of different pole pieces of a plurality of same polarities; When for the passing of the electrode terminal 3 of a plurality of different pole pieces; The electrode terminal 3 and cover board body 1 insulation processing that can have only a kind of pole piece, but also electrode terminal 3 and 1 equal insulation processing of cover board body.Shape the utility model of through hole 11 is restriction not, only needs to pass electrode terminal 3 and gets final product, for example can be for running through the cylinder of cover board body 1, and diameter is a bit larger tham electrode terminal 3, and present embodiment specifically is preferably stepped hole, is used for engaging cover plate connector 2 is installed.Number the utility model of cover board body 1 is restriction not; Opening number according to battery container designs, and shape the utility model of cover board body 1 is not restriction also, designs according to the shape of the opening of battery container; Cooperate housing, for example can for circle also can be for square.Size for example thickness can be 1.5mm or 2.0mm.Material the utility model of cover board body 1 is not restriction also, for example can be selected from aluminium alloy 3003, fine aluminium etc.Other structure example such as liquid injection port etc. can be passed through existing techniques in realizing with manufacture method on the cover board body 1, do not do at this and give unnecessary details.
Like accompanying drawing 1,2,3, shown in 4, have the electrode hole 21 that runs through cover plate connector 2 on the cover plate connector 2, electrode terminal 3 passes electrode hole 21 and 2 insulated enclosures of cover plate connector.Cover plate connector 2 is used for being tightly connected with cover board body 1; Present embodiment is mainly ceramic seal spare 4, electrode terminal 3 is sealedly connected with cover board body 1; After earlier electrode terminal 3, ceramic seal spare 4, cover plate connector 2 being processed integrative-structure; With cover plate connector 2 and cover board body 1 welding, realize the insulated enclosure of cover plate assembly again.The less parts of cover plate connector 2 general employings; Not restriction of shape, structure and position the utility model to cover plate connector 2; For example can be at the upper surface of cover board body 1 or lower surface etc.; Adopt bow-shaped structural etc., the electrode terminal that is made of one structure 3, ceramic seal spare 4, cover plate connector 2 are connected with cover board body 1, electrode terminal 3 and 1 of cover board body were gone back clamping when this moment, general electrode terminal 3 passed the through hole 11 on the cover board body 1 has insulating sealer.Simplify technology etc. for strengthening the steadiness that connects, reaching, the preferred cover plate connector 2 of the utility model is arranged in the through hole 11 of cover board body 1, better sealing-in.The utility model is convenient to the installation of electrode terminal 3, and preferred, cover plate connector 2 comprises a mounting groove 22, and electrode hole 21 runs through the bottom 223 of mounting groove 22.Preferably, prolong periphery on the mounting groove 22 and comprise turnup structure 221, be connected with cover board body 1 through turnup structure 221; Not only weld more aspect; And can avoid because the influence that the change in size of a little is brought the sealing property of cover plate assembly during with ceramic seal spare 4 high-temperature soldering, sealing property is better, and technology is simpler; Need not consider the scale error of cover plate connector 2, the battery yield improves.And the through hole 11 of present embodiment can be set to stepped hole under the preferable situation, and the turnup structure 221 of cover plate connector 2 is positioned on the step 111 of stepped hole and is connected with cover plate, i.e. turnup structure 221 engaging cover board bodies 1; With stepped hole overlap joint, connect more firmly, the thickness that turnup structure 221 can be set can just compensate cover board body 1 part that lacks on the step 111 of stepped hole; Be that cover plate connector 2 can better be made of one structure with cover board body 1; Improve the connectivity robustness of cover plate connector 2 and cover board body 1, guarantee cover board body 1 surface smooth simultaneously, generally design the less internal diameter of stepped hole greater than mounting groove bottom 223 diameters; Be convenient to place mounting groove; Less than whole external diameter with mounting groove of turnup structure 221, stepped hole greater than whole external diameter with mounting groove of turnup structure 221, cooperates better than large diameter.Height the utility model of cover plate connector 2 is restriction not, can be less than the thickness of cover board body 1, preferably quite.Preferably, the cell wall 222 of mounting groove is connected with the smooth transition that is connected to of mounting groove bottom 223, for example like accompanying drawing 1; Can connect 224 for arc; The cell wall 222 of mounting groove is connected to smooth transition with turnup structure 221 and is connected, and for example like accompanying drawing 1, can connect 224 for arc; Guarantee in time mechanical stress to be cushioned and to weaken in each parts fixed connection process; And can strengthen the bending strength of cover plate assembly, guarantee the excellent sealing property of the cover plate assembly of the utility model, the stress that produces when wherein the cell wall 222 of mounting groove itself also can slow down cover plate connector 2 with 4 welding of ceramic seal spare.Cover plate connector 2 can be commercial, can adopt the thin one-body molded preparation of sheet metal, and for example the thickness of battery connector can be 0.8mm, can have certain toughness etc., convenient welding.
Number the utility model of the electrode hole 21 of cover plate connector 2 is restriction not; For example can design according to the number of electrode terminal 3; For example a big cover plate connector 2 can only be set in the through hole of cover board body 1; The electrode hole of setting and extraction electrode terminal 3 equal numbers on cover plate connector 2, each electrode terminal 3 passes an electrode hole projected current then, and 2 of the electrode terminal 3 of at least a polarity and cover plate connectors are provided with insulating sealer.Also can design the number of cover plate connector 2 according to the number of electrical terminal, have only an electrode hole in the cover plate connector 2, the electrode hole number of each cover plate connector 2 is also different in perhaps a plurality of cover plate connectors 2.
The material of cover plate connector 2 is generally selected the material consistent with cover board body 1 for use.For example can be aluminium alloy 3003, fine aluminium, not only weld more conveniently, and guarantee the intensity of cover plate assembly.
Like accompanying drawing 1,2,3, shown in 5, the concrete electrode terminal 3 of present embodiment comprises pole 32 and polar cap 31.Polar cap 31 can be one-body molded with pole 32, also can be back welding or cold-heading assembling.Material the utility model of polar cap 31 and pole 32 is restriction not, can adopt conventional material, for example for positive electrode terminal, can be for fine aluminium etc., and negative electrode terminal can be for fine copper etc.
Being shaped as of general pole 32 is cylindrical, and in the present embodiment, the diameter of pole 32 is 9 mm ± 0.5 mm, the size of other parts in the cover plate assembly, and for example: the big I of through hole 11, electrode hole 21, mesopore 41 is confirmed according to the diameter of pole 32.Polar cap 31 external diameters are greater than pole 32, can be for thicker cylindric, also can be for thin circular metal plate etc., and not restriction of the utility model also can be handled polar cap 31, and for example top end edge chamfer etc. is convenient to external loading and is connected.Pole 32 comprises two ends, and an end is a first end, and the other end is a second end, and polar cap 31 is positioned at the first end of pole 32, and electrode terminal 3 can be regarded " T " font as in the placement figure of present embodiment.Preferably, polar cap 31 inner surfaces are also to be provided with buffer structure 311 on the lower surface of polar cap 31 among Fig. 1, are used to cushion or reduce at the stress of electrode tip 3 during with 4 welding of ceramic seal spare; Buffer structure 311 can be support ring under the preferable situation; Promptly on the lower surface of polar cap 31, make the annular supports boss, external diameter the utility model of annular supports boss is restriction not, generally is slightly smaller than the polar cap external diameter and gets final product; Thickness is not restriction also; Be generally corresponding clamping insulating sealer ring thickness 1/3 ~ 3/4, the height of boss can be greater than 1/3 of the height of the insulating sealer of corresponding clamping, present embodiment is 8.8 for external diameter
0 -0.03Polar cap 21, can to extend highly be 1.0 ± 0.05mm from outward flange 1.5 ± 0.05mm place at its lower surface, external diameter is 9.2 ± 0.05mm, internal diameter is that 8.2 ± 0.05mm is that thickness is the annular boss of 1.0 ± 0.05mm.Annular boss does not generally combine with pole 32, and its internal diameter is greater than pole 32 external diameters, and there is certain clearance in 32 of poles.Buffer structure 311 can be one-body molded with polar cap 31, when making polar cap 31, makes this structure, buffer structure 311 is welded on polar cap 31 lower surfaces after also can being.
Be provided with the insulating sealer insulated enclosure between general electrode terminal 3 and the cover plate connector 2; Insulating sealer the utility model is restriction not; For example can be moulding, the technical scheme of the utility model can prevent the influence of injection moulding high temperature to cover board body 1 when for moulding.The utility model preferably adopts ceramic seal spare 4 insulated enclosures.Like accompanying drawing 1,2,3, shown in 6, preferred, ceramic seal spare 4 comprises the connecting portion 43 that the sealing 42 that is arranged in the electrode hole 21 and external diameter are connected with cover plate connector 2 greater than sealing 42; Connecting portion 43 is arranged in mounting groove and is connected with cover plate connector 2 under the preferable situation, promptly is fastened on mounting groove inside, more easily welding; Connect more firm; The external diameter of the aperture fitted seal portion 42 of general design electrode hole 21 less than the external diameter of connecting portion 43, makes cover plate assembly have good sealing property.Connection can be adopted the method for attachment that well known to a person skilled in the art various potteries and metal; For example can adopt behind the ceramic surface metallization and metal solder etc.; For example specifically can be between the inner surface of connecting portion 43 and mounting groove bottom 223, being provided with the first metal solder layer (not shown); Wherein, The first metal solder layer is through form through the soldering welding after being metallized in the connecting portion surface again and between the inner surface of mounting groove bottom, and metallization can be adopted ceramic surface metallization technology common in the prior art, for example can carry out the manganese molybdenumization to ceramic surface.Under the preferable case, ceramic metallization is accomplished also can proceed the element that nickel plating, aluminium etc. do not influence welding, to strengthen the mechanical strength of welding position and base material to be welded.Can also be preferably between the inner surface of connecting portion 43 and mounting groove bottom 223 through the transition metal ring is set, the mechanical stress that the transition metal ring plate is used to cushion or produces when reducing soldering.The transition metal ring plate can adopt the common various metal material that welds with copper or copper alloy, aluminum or aluminum alloy of being prone to, for example can adopt kovar alloy fine aluminium, aluminium alloy, etc.The maximum outside diameter of transition metal ring plate can be identical with the external diameter of the connecting portion of ceramic seal spare 4, also can be different, and the utility model does not have particular determination.More preferably under the situation, the element that nickel plating, aluminium etc. do not influence welding also can be carried out in transition metal ring plate surface, to strengthen the mechanical strength of welding position and base material to be welded.Soldering is welded as the welding procedure that those skilled in the art use always, repeats no more in the utility model.Weld through soldering; Can will make welding node place and base material to be welded be integrally formed structure; Be the structure that is welded into one between cover plate connector 2 and the ceramic seal spare 4, guarantee its sealing intensity on the one hand, reduce the interface difference of material on the other hand; Thereby reduce the internal resistance of cover plate assembly, reduce the battery caloric value.
Ceramic seal spare 4 centers are formed with mesopore 41, and electrode terminal 3 passes this mesopore 41, draws the inside battery electric current, simultaneously through ceramic seal spare 4 and 2 insulation of cover plate connector.In the present embodiment, mesopore 41 internal diameters of ceramic seal spare 4 mate with pole 32 external diameters of the electrode terminal 3 that passes it, can be a bit larger tham the external diameter of pole 32; Make and form the gap between mesopore 41 and the pole 32; To avoid ceramic seal spare expanded by heating,, thereby guarantee to wear pole 32 less than the external diameter of polar cap 31; Polar cap 31 is connected on the ceramic seal spare 4, has good sealing property thereby make between ceramic seal spare 4 and the electrode terminal 3.Polar cap 31 is connected with connecting portion 43 outer faces.Connection can be adopted the method for attachment that well known to a person skilled in the art various potteries and metal; For example can adopt metal promoted solder flux etc.; For example specifically can be between polar cap 31 and connecting portion 43 outer faces, being provided with the second metal solder layer (not shown), the second metal solder layer is through form through the soldering welding after being metallized in connecting portion 43 outer faces again and between the polar cap 31.Wherein, The first metal solder layer is through form through the soldering welding after the connecting portion end face is metallized again and between the inner surface of polar cap 31; Metallization can be adopted ceramic surface metallization technology common in the prior art, for example can carry out the manganese molybdenumization to ceramic surface.Under the preferable case, ceramic metallization is accomplished also can proceed the element that nickel plating, aluminium etc. do not influence welding, to strengthen the mechanical strength of welding position and base material to be welded.Can also preferably between polar cap 31 and connecting portion 43 outer faces, also be provided with the transition metal ring plate, the mechanical stress that the transition metal ring plate is used to cushion or produces when reducing soldering.The transition metal ring plate can adopt the common various metal material that welds with copper or copper alloy, aluminum or aluminum alloy of being prone to, and for example can adopt kovar alloy or copper or copper alloy, aluminum or aluminum alloy.The maximum outside diameter of transition metal ring plate can be identical with the external diameter of the connecting portion of ceramic seal spare 4, also can be different, and the utility model does not have particular determination.More preferably under the situation, the element that nickel plating, aluminium etc. do not influence welding also can be carried out in transition metal ring plate surface, to strengthen the mechanical strength of welding position and base material to be welded.。Soldering is welded as the welding procedure that those skilled in the art use always, repeats no more in the utility model.Weld through soldering; Can will make welding node place and base material to be welded be integrally formed structure; Be the structure that is welded into one between cover plate connector 2 and the ceramic seal spare 4, guarantee its sealing intensity on the one hand, reduce the interface difference of material on the other hand; Thereby reduce the internal resistance of cover plate assembly, reduce the battery caloric value.
Ceramic seal spare 4 can be in aluminium oxide ceramics ring, zirconia ceramics ring, aluminium nitride ceramics ring, boron nitride ceramics ring, silicon nitride ceramics ring, aluminium oxide and the zirconic composite ceramics ring a kind of; Preferred aluminium oxide ceramic ring, aluminium oxide and zirconic composite ceramics ring; In the present embodiment; The aperture of the mesopore that ceramic seal spare 4 middle parts form is ￠ 6.2 ± 0.1mm, and thickness is 2.5 ± 0.1mm, and the decay resistance of ceramic seal spare 4 is very good; Can do not corroded, can guarantee the useful life of lithium ion battery by electrolyte; And impact strength, the thermal shock resistance of ceramic seal spare 4 are superior to vitreum, make that the structure of cover plate assembly is more stable, and sealing effectiveness is better; What deserves to be mentioned is that adopt ceramic seal spare 4 as the sealing-in medium, compared to adopting ceramic wafer, its thickness is thicker, thermal shock resistance and thermal circulation performance are better.
In the present embodiment, pole 32 is located in the mesopore 41 of ceramic seal spare 4, and the second end extends ceramic seal spare 4, be used for battery container in pole piece conduct.Under the preferable situation, electrode connecting piece 5 is set, the second end that extends the pole 32 of ceramic seal spare 4 is connected (shown in accompanying drawing 3) with electrode connecting piece 5, through the welding of the lug on electrode connecting piece 5 and the pole piece, realizes drawing of electric current again.
Be generally and prevent short circuit, 5 of cover board body 1 or cover plate connector 2 and electrode connecting piece need insulation processing, for example can between them, put into sealing ring 6.Present embodiment specifically can be for being set in the sealing ring 6 of O type the lower end of ceramic seal spare 4, and the lower end of ceramic seal spare 4 is coated in the sealing ring 6, and sealing ring 6 can use PP or PE plastic rubber material etc. to be insoluble to the material of electrolyte.
The concrete manufacture method of the cover plate assembly of present embodiment comprises the steps:
Step 1, metallized in two surfaces of the connecting portion of ceramic seal spare.
An O RunddichtringO on the outer cover of step 4, the ceramic seal spare that after passing electrode hole, spills electrode hole and pole; Vertically weld a slice shape electrode lead-out tablet again in the end of the pole that extends mesopore; Welding can be the physics welding method, and the physics welding method is electric resistance welding, Laser Welding or ultrasonic bond, is used to realize the welding between metal and the metal; The processing step of electric resistance welding, Laser Welding or ultrasonic bond and parameter have been conventionally known to one of skill in the art, do not do at this and give unnecessary details.
Step 5, above-mentioned preparation all-in-one-piece electrode terminal, ceramic seal spare, cover plate connector are put into the through hole of cover board body again; The turnup structure overlap joint of cover plate connector is on the step of stepped hole; After the welding of turnup structure and cover board body is processed integrative-structure with cover plate assembly; Welding can be the physics welding method, and the physics welding method is electric resistance welding, Laser Welding or ultrasonic bond, is used to realize the welding between metal and the metal; The processing step of electric resistance welding, Laser Welding or ultrasonic bond and parameter have been conventionally known to one of skill in the art, do not do at this and give unnecessary details.
Above-mentioned preparation method can prepare an electrode terminal on a cover board body, also can prepare the electrode terminal of opposed polarity; Above-mentioned preparation method's order can be adjusted according to mounting means and welding temperature; General when electrode terminal is negative electrode terminal, can directly prepare, when electrode terminal is the positive electricity end period of the day from 11 p.m. to 1 a.m with reference to above-mentioned steps; Can adopt step 2,3 is merged welding together again after soon electrode terminal, ceramic seal spare, cover board body opsition dependent relation assemble earlier.For example when containing the electrode terminal of both positive and negative polarity; Can be earlier for example negative electrode terminal and ceramic seal spare are processed integrative-structure with a kind of electrode terminal of polarity with reference to above-mentioned steps 1,2; After with the assembling of integrative-structure and cover board body; Refer again to step 1 with the electrical terminal of the another kind of polarity ceramic seal spare surface metalation of positive electrode terminal for example; After with positive electrode terminal, ceramic seal spare and cover board body assembling, refer again to the welding that step 3 is carried out negative electrode terminal, positive electrode terminal, carry out subsequent step etc. at last.
During the assembling entire lithium ion battery, for example: an end opening of housing is positioned over pole piece in the housing; And fluid injection in housing, the cover plate assembly that will be manufactured with two electrode terminals then is installed on this openend of housing, in this process; The periphery of cover plate assembly is welded with housing mutually, and the electrode lead-out tablet of cover plate assembly is connected with pole piece (specifically, the positive plate of pole piece is connected through the electrode lead-out tablet that is connected on anode ear and one of them electrode terminal; The negative plate of pole piece is connected through the electrode lead-out tablet that is connected on negative electrode lug and another electrode terminal, and concrete structure can pass through existing techniques in realizing), after the installation; Form seal cavity between cover plate assembly and the housing; In the sealing space, contain pole piece and electrolyte, two electrode terminals can external power consumption equipment respectively as the two poles of the earth of lithium ion battery.
Again for example: with the equal opening in the two ends of housing, difference mounting cover board component, wherein a cover plate assembly is the cover plate assembly that the anode electrode terminal is arranged; And another cover plate assembly is that the cover plate assembly of negative electrode terminal is arranged is example, these two cover plate assemblies is installed on two openends of housing respectively, in this process; The periphery of these two cover plate assemblies is welded with housing mutually; And the pole of these two cover plate assemblies is connected with pole piece (specifically, the positive plate of pole piece is connected through the pole of anode ear with the cover plate assembly that the anode electrode terminal is arranged, and the negative plate of pole piece is connected through the pole of negative electrode lug with the cover plate assembly that the negative electrode terminal is arranged; Concrete structure can pass through existing techniques in realizing); After the installation, form seal cavity between these two cover plate assemblies and the housing, in the sealing space, contain pole piece and electrolyte; The stem stem of these two cover plate assemblies can external power consumption equipment respectively as the two poles of the earth of lithium ion battery.
The utility model adopts earlier electrode terminal with after cover plate connector insulated enclosure is connected, passes through the cover plate connector again and is connected with cover board body, owing to the cover plate connector can adopt small construction, when being ceramic seal spare high-temperature soldering; Not yielding, and also capable of washing behind the sintering, conveniently be easy to get, again with cover plate connector and cover board body welding; Mainly acting as of cover plate connector is sealedly connected ceramic seal spare, electrode terminal and cover board body, therefore its shape there is not special demands yet, and volume is little; Amorphism specific (special) requirements and special parts, so during high temperature, distortion itself is also little; Can not influence the sealing of battery, will weld, realize easily with the cover plate connector and the cover board body of the same material of cover board body; And to the nothing influences such as intensity of cover board body, the technical scheme of the utility model can be enhanced productivity, and reduces cost of manufacture; Particularly yield is high, and security performance is good, for the practical application and the development of the battery of ceramic seal are laid a good foundation.
Those skilled in the art know easily; The above is merely the preferred embodiment of the utility model; Not in order to restriction the utility model; Any modification of being done within all spirit and principles at the utility model, be equal to replacement and improvement etc., all should be included within the protection range of the utility model.The protection range of the utility model is confirmed by claims.
Claims (24)
1. a cover plate assembly is characterized in that, comprises cover board body, cover plate connector and electrode terminal;
Have the electrode hole that runs through the cover plate connector on the said cover plate connector, said electrode terminal passes insulated enclosure between electrode hole and cover plate connector;
Have the through hole that runs through cover board body on the said cover board body, said electrode terminal passes said through hole projected current;
Said cover plate connector and cover board body are tightly connected.
2. cover plate assembly according to claim 1 is characterized in that, said cover plate connector is arranged in said through hole.
3. cover plate assembly according to claim 1 is characterized in that, said cover plate connector comprises a mounting groove, and said electrode hole runs through the mounting groove bottom.
4. cover plate assembly according to claim 3 is characterized in that, prolongs periphery on the said mounting groove and comprises turnup structure, and said turnup structure is connected with cover board body.
5. cover plate assembly according to claim 4 is characterized in that, said through hole is a stepped hole, and said turnup structure is positioned on the step of stepped hole and is connected with cover plate.
6. cover plate assembly according to claim 4 is characterized in that, the cell wall of said mounting groove is connected with the smooth transition that is connected to of mounting groove bottom, and the cell wall of said mounting groove is connected to smooth transition with turnup structure and is connected.
7. cover plate assembly according to claim 1 is characterized in that, clamping ceramic seal spare insulated enclosure between said electrode terminal and the cover plate connector.
8. cover plate assembly according to claim 7 is characterized in that, said ceramic seal spare center is formed with mesopore, and said electrode terminal passes said mesopore.
9. cover plate assembly according to claim 1 is characterized in that, said ceramic seal spare comprises the connecting portion that the sealing that is arranged in the electrode hole and external diameter are connected with the cover plate connector greater than sealing.
10. cover plate assembly according to claim 9 is characterized in that, said cover plate connector comprises a mounting groove, and said connecting portion is in mounting groove.
11. cover plate assembly according to claim 10; It is characterized in that; Be provided with the first metal solder layer between the inner surface of said connecting portion and mounting groove bottom, the said first metal solder layer is through form through the soldering welding after being metallized in the connecting portion surface again and between the inner surface of mounting groove bottom.
12. cover plate assembly according to claim 10 is characterized in that, also is provided with the transition metal ring between the inner surface of said connecting portion and mounting groove bottom.
13. cover plate assembly according to claim 8 is characterized in that, said electrode terminal comprises pole and polar cap, and the two ends of said pole are first end and the second end, and said polar cap is positioned at the first end of pole; Said pole is arranged in the mesopore of ceramic seal spare, and the second end extends ceramic seal spare.
14. cover plate assembly according to claim 13 is characterized in that, said ceramic seal spare comprises the connecting portion that the sealing that is arranged in the electrode hole and external diameter are connected with the cover plate connector greater than sealing; Said polar cap is connected with the connecting portion outer face.
15. cover plate assembly according to claim 14; It is characterized in that; Be provided with the second metal solder layer between said polar cap and the connecting portion outer face, the said second metal solder layer is through form through the soldering welding after being metallized in the connecting portion outer face again and between the polar cap.
16. cover plate assembly according to claim 14 is characterized in that, also is provided with the transition metal ring plate between said polar cap and the connecting portion outer face.
17., it is characterized in that the transition metal ring plate is the kovar alloy sheet according to claim 12 or 16 described cover plate assemblies.
18. cover plate assembly according to claim 14 is characterized in that, also is provided with buffer structure on the said polar cap inner surface and is positioned between polar cap and connecting portion outer face.
19. cover plate assembly according to claim 18 is characterized in that, said buffer structure is a support ring.
20. cover plate assembly according to claim 13 is characterized in that, also is connected with electrode connecting piece on the second end of the said pole that extends ceramic seal spare.
21. cover plate assembly according to claim 20 is characterized in that, is provided with sealing ring between said cover plate connector and electrode connecting piece.
22. cover plate assembly according to claim 1 is characterized in that, the number of said electrode terminal is a plurality of, has a plurality of electrode holes on the said cover plate connector.
23. cover plate assembly according to claim 1 is characterized in that, the number of said electrode terminal is a plurality of, and the number of said cover plate connector is a plurality of.
24. a battery comprises: cover plate assembly, battery container, pole piece and electrolyte, pole piece and electrolyte level are in battery container, and cover plate assembly and battery container are tightly connected; The inside battery electric current is drawn in electrode terminal on the said cover plate assembly and pole piece conducting, it is characterized in that, said cover plate assembly is any described cover plate assembly of claim 1-23.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201701433U CN202601738U (en) | 2012-04-20 | 2012-04-20 | Cover plate component and battery comprising cover plate component |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201701433U CN202601738U (en) | 2012-04-20 | 2012-04-20 | Cover plate component and battery comprising cover plate component |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202601738U true CN202601738U (en) | 2012-12-12 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012201701433U Expired - Lifetime CN202601738U (en) | 2012-04-20 | 2012-04-20 | Cover plate component and battery comprising cover plate component |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202601738U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378321A (en) * | 2012-04-20 | 2013-10-30 | 比亚迪股份有限公司 | Cover plate component and battery with same |
| CN103647031A (en) * | 2013-12-06 | 2014-03-19 | 广州力柏电动科技有限公司 | Battery insulating and sealing structure |
| CN107994143A (en) * | 2016-10-27 | 2018-05-04 | 慈晟 | A kind of battery cover board with double protection functions |
| CN110828720A (en) * | 2019-11-12 | 2020-02-21 | 浙江锦泰电子有限公司 | Battery cover plate |
-
2012
- 2012-04-20 CN CN2012201701433U patent/CN202601738U/en not_active Expired - Lifetime
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103378321A (en) * | 2012-04-20 | 2013-10-30 | 比亚迪股份有限公司 | Cover plate component and battery with same |
| CN103378321B (en) * | 2012-04-20 | 2016-02-03 | 比亚迪股份有限公司 | A kind of cover plate assembly and the battery containing this cover plate assembly |
| CN103647031A (en) * | 2013-12-06 | 2014-03-19 | 广州力柏电动科技有限公司 | Battery insulating and sealing structure |
| CN103647031B (en) * | 2013-12-06 | 2016-01-13 | 广州力柏电动科技有限公司 | A kind of battery insulation hermetically-sealed construction |
| CN107994143A (en) * | 2016-10-27 | 2018-05-04 | 慈晟 | A kind of battery cover board with double protection functions |
| CN110828720A (en) * | 2019-11-12 | 2020-02-21 | 浙江锦泰电子有限公司 | Battery cover plate |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121212 |
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| CX01 | Expiry of patent term |