CN105702887A - Cover board assembly for power battery and power battery - Google Patents
Cover board assembly for power battery and power battery Download PDFInfo
- Publication number
- CN105702887A CN105702887A CN201610077985.7A CN201610077985A CN105702887A CN 105702887 A CN105702887 A CN 105702887A CN 201610077985 A CN201610077985 A CN 201610077985A CN 105702887 A CN105702887 A CN 105702887A
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- Prior art keywords
- pole
- insulator
- cover board
- halfpace
- composite flange
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- 239000012212 insulator Substances 0.000 claims abstract description 142
- 239000002131 composite material Substances 0.000 claims abstract description 105
- 239000000463 material Substances 0.000 claims description 32
- 229910000679 solder Inorganic materials 0.000 claims description 23
- 230000007704 transition Effects 0.000 claims description 23
- 239000011248 coating agent Substances 0.000 claims description 19
- 238000000576 coating method Methods 0.000 claims description 19
- 239000002184 metal Substances 0.000 claims description 19
- 238000007789 sealing Methods 0.000 claims description 15
- 230000000994 depressogenic effect Effects 0.000 claims description 12
- 239000003792 electrolyte Substances 0.000 claims description 6
- 229910010293 ceramic material Inorganic materials 0.000 claims description 5
- 230000004308 accommodation Effects 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims description 3
- 238000003466 welding Methods 0.000 abstract description 36
- 238000009434 installation Methods 0.000 abstract 3
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 239000000306 component Substances 0.000 description 32
- 230000000694 effects Effects 0.000 description 9
- 230000035882 stress Effects 0.000 description 9
- 238000005516 engineering process Methods 0.000 description 6
- 238000000034 method Methods 0.000 description 5
- -1 when pole stress Substances 0.000 description 5
- 230000032683 aging Effects 0.000 description 4
- 238000005097 cold rolling Methods 0.000 description 4
- 238000005098 hot rolling Methods 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000004033 plastic Substances 0.000 description 4
- 229920003023 plastic Polymers 0.000 description 4
- 238000003825 pressing Methods 0.000 description 4
- 230000003139 buffering effect Effects 0.000 description 2
- 239000000919 ceramic Substances 0.000 description 2
- 238000005336 cracking Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000002347 injection Methods 0.000 description 2
- 239000007924 injection Substances 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 239000000155 melt Substances 0.000 description 2
- 239000007769 metal material Substances 0.000 description 2
- 238000012797 qualification Methods 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 239000008358 core component Substances 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000011810 insulating material Substances 0.000 description 1
- 125000006850 spacer group Chemical group 0.000 description 1
Classifications
-
- 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
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60L—PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES; SUPPLYING ELECTRIC POWER FOR AUXILIARY EQUIPMENT OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRODYNAMIC BRAKE SYSTEMS FOR VEHICLES IN GENERAL; MAGNETIC SUSPENSION OR LEVITATION FOR VEHICLES; MONITORING OPERATING VARIABLES OF ELECTRICALLY-PROPELLED VEHICLES; ELECTRIC SAFETY DEVICES FOR ELECTRICALLY-PROPELLED VEHICLES
- B60L53/00—Methods of charging batteries, specially adapted for electric vehicles; Charging stations or on-board charging equipment therefor; Exchange of energy storage elements in electric vehicles
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
-
- 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
- H01M50/543—Terminals
-
- 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
- H01M2220/20—Batteries in motive systems, e.g. vehicle, ship, plane
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/70—Energy storage systems for electromobility, e.g. 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/60—Other road transportation technologies with climate change mitigation effect
- Y02T10/7072—Electromobility specific charging systems or methods for batteries, ultracapacitors, supercapacitors or double-layer capacitors
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02T90/10—Technologies relating to charging of electric vehicles
- Y02T90/14—Plug-in electric vehicles
Abstract
The invention discloses a cover board assembly for a power battery and the power battery. The power battery comprises poles, insulators, composite ring flanges and a cover board body, wherein a welding part which protrudes to surround each pole is arranged on the pole between the top end and the bottom end; each welding part comprises a lower terrace, a buffer wall and an upper terrace; each lower terrace is connected with the corresponding pole; one side, far away from the corresponding pole, of each lower terrace is connected with the corresponding buffer wall; each buffer wall is also connected with the corresponding upper terrace; and the distance from each upper terrace to the plane in which the top end of the corresponding pole is located is smaller than that from the corresponding lower terrace to the plane in which the top end of the corresponding pole is located; a pole installation hole is formed in each insulator; the bottom end of each pole extends along the corresponding pole installation hole and penetrates through the corresponding insulator; each upper terrace is in contact with the upper surface of the corresponding insulator to prevent the corresponding pole from further sliding towards the inside of the corresponding pole installation hole; the lower surface of each upper terrace and the upper surface of the corresponding insulator are hermetically welded; and each composite ring flange is connected with the corresponding insulator and the cover board body respectively. According to the cover board assembly of the power battery and the power battery, the use safety is improved; and the service lifetime is prolonged.
Description
Technical field
The present invention relates to electrokinetic cell field, especially relate to a kind of power battery cover board component and electrokinetic cell。
Background technology
Lithium-ion-power cell, as the energy output critical component of electric motor car (pure electronic and mixed dynamic), is subject to the new forms of energy producers such as each auto vendor, battery producer and energy storage and is paid attention to。And cover plate of power battery is the core component of battery structure。The cover plate of general lithium-ion-power cell is made up of cover board body, plastic spacer, pole and riveting sheet, after adopting injection moulding, the mode of riveted joint is connected as a single entity, wherein plastics are as the sealed insulating material between cover board body and battery electrode column, plastics use in varying environment and extreme environment there will be contractions, aging, riveted joint is loosening etc. causes that battery leakage causes safety problem。
In order to avoid plastics can go out safe problem as cell sealing and insulant use at different conditions, adopt ceramic ring as cell sealing and insulant。Pottery belongs to environment-friendly materials, has long service life, will not be aging, indeformable, and aboundresources, the features such as cost is low。
In manufacturing process, there is terminal post complex manufacturing technology, welding instability, owing to pottery stress is excessive, thus causing power battery structure high cost, even there is pottery and having crackle or broken problem in existing electrokinetic cell ceramic cover plate assembly。
Stablize and leakage problem to improve welding, in prior art, can prominent weld part be set on pole, weld part can arrange buffer part, but buffer part may be contained within the outside of insulator, when pole stress, buffer part is easily deformed and tears and the welding of insulator, how to avoid the generation of this situation, be the problem needing to solve。
Summary of the invention
The main purpose of the present invention extrudes, for providing a kind of receiving, the power battery cover board component and electrokinetic cell that still can remain intact energetically。
In order to realize foregoing invention purpose, the present invention proposes a kind of power battery cover board component, including pole, insulator, composite flange and cover board body；
Described pole includes top and bottom, arranging the convex hole weld part around pole on pole between top and bottom, this weld part includes lower halfpace, buffer wall and upper halfpace, and described lower halfpace is connected with pole, lower halfpace connects buffer wall away from the side of pole, and buffer wall is also connected with halfpace；The distance of place, the top plane of described upper halfpace distance pole is less than the distance of place, the top plane of lower halfpace distance pole；
Described insulator arranges pole installing hole, the bottom of described pole is stretched into along pole installing hole and runs through described insulator, the upper surface of described upper halfpace and insulator stops that pole continues to slide in pole installing hole, and the lower surface of upper halfpace seals with the upper surface of insulator and welds；The weld of described insulator and described composite flange arranges metal solder coating；
Described composite flange is positioned at the insulator side away from pole top, and the flange hole of this composite flange and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole, and has gap with the hole wall of flange hole；Described composite flange is welded with insulator seal by described metal solder coating near the side of insulator；
Arranging composite flange installing hole on described cover board body, composite flange is installed in composite flange installing hole；Described composite flange welds with the sealing of described cover board body away from the side of insulator。
Further, described composite flange installing hole is provided with depressed part near the edge of the side of insulator, and described composite flange is sticked in depressed part adaptedly。
Further, the lower surface of described upper halfpace is provided with at least one saw-tooth ring around pole。
Further, the upper surface correspondence saw-tooth ring of described insulator is arranged at the cannelure around pole。
Further, described insulator is that ceramic material is made。
Further, described composite flange includes the weld layer of at least two-layer unlike material；
Described composite flange is welded with insulator seal by described metal solder coating near the weld layer of insulator；
Described composite flange welds with the sealing of described cover board body away from the weld layer of insulator。
Further, described composite flange includes base ring platform and apical ring platform；
Described base ring platform and the coaxial stacking of apical ring platform are arranged, and the diameter length of apical ring platform is less than the diameter length of apical ring platform。
Further, described composite flange includes base ring platform, transition land and apical ring platform；
Described base ring platform, transition land and the sequentially coaxially stacking of apical ring platform are arranged, the diameter length of the diameter length of the described transition land diameter length less than base ring platform and apical ring platform。
The present invention also proposes a kind of electrokinetic cell, and including pole piece, electrolyte, housing and power battery cover board component, described electrolyte, pole piece are contained in the accommodation space of housing and the formation of power battery cover board component；
Described power battery cover board component, including pole, insulator, composite flange and cover board body；
Described pole includes top and bottom, arranging the convex hole weld part around pole on pole between top and bottom, this weld part includes lower halfpace, buffer wall and upper halfpace, and described lower halfpace is connected with pole, lower halfpace connects buffer wall away from the side of pole, and buffer wall is also connected with halfpace；The distance of place, the top plane of described upper halfpace distance pole is less than the distance of place, the top plane of lower halfpace distance pole；
Described insulator arranges pole installing hole, the bottom of described pole is stretched into along pole installing hole and runs through described insulator, the upper surface of described upper halfpace and insulator stops that pole continues to slide in pole installing hole, and the lower surface of upper halfpace seals with the upper surface of insulator and welds；The weld of described insulator and described composite flange arranges metal solder coating；
Described composite flange is positioned at the insulator side away from pole top, and the flange hole of this composite flange and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole, and has gap with the hole wall of flange hole；Described composite flange is welded with insulator seal by described metal solder coating near the side of insulator；
Arranging composite flange installing hole on described cover board body, composite flange is installed in composite flange installing hole；Described composite flange welds with the sealing of described cover board body away from the side of insulator。
Further, described composite flange installing hole is provided with depressed part near the edge of the side of insulator, and described composite flange is sticked in depressed part adaptedly。
Further, the lower surface of described upper halfpace is provided with at least one saw-tooth ring around pole。
Further, the upper surface correspondence saw-tooth ring of described insulator is arranged at the cannelure around pole。
Further, described insulator is that ceramic material is made。
Further, described composite flange includes the weld layer of at least two-layer unlike material；
Described composite flange is welded with insulator seal by described metal solder coating near the weld layer of insulator；
Described composite flange welds with the sealing of described cover board body away from the weld layer of insulator。
Further, described composite flange includes base ring platform and apical ring platform；
Described base ring platform and the coaxial stacking of apical ring platform are arranged, and the diameter length of apical ring platform is less than the diameter length of apical ring platform。
Further, described composite flange includes base ring platform, transition land and apical ring platform；
Described base ring platform, transition land and the sequentially coaxially stacking of apical ring platform are arranged, the diameter length of the diameter length of the described transition land diameter length less than base ring platform and apical ring platform。
The power battery cover board component of the present invention and electrokinetic cell, the lower halfpace of the weld part on pole stretches into the pole installing hole of insulator, and upper halfpace is positioned at the outside of pole installing hole of insulator, when the top stress compressing of pole, the power that buffer wall is stretched under the effect of upper halfpace, so buffer wall is unlikely to deform, and upper halfpace directly acts on insulator, it is unlikely to deform equally, reduce the slip gradient of insulator and weld part welding position, improve the safety in utilization of power battery cover board component, improve the service life of power battery cover board component。And electrokinetic cell is owing to using above-mentioned power battery cover board component, so equally possible raising safety in utilization, and service life。
Accompanying drawing explanation
Fig. 1 is the structural representation of the power battery cover board component of one embodiment of the invention；
Fig. 2 is the A-A sectional view of Fig. 1；
Fig. 3 is the sectional view of the power battery cover board component of another embodiment of the present invention；
Fig. 4 is the structural representation of the composite flange of one embodiment of the invention；
Fig. 5 is the B-B sectional view of Fig. 4；
Fig. 6 is the structural representation of the composite flange of another embodiment of the present invention；
Fig. 7 is the C-C sectional view of Fig. 6；
Fig. 8 is the structural representation of the electrokinetic cell of one embodiment of the invention。
The realization of the object of the invention, functional characteristics and advantage will in conjunction with the embodiments, are described further with reference to accompanying drawing。
Detailed description of the invention
Should be appreciated that specific embodiment described herein is only in order to explain the present invention, is not intended to limit the present invention。
Referring to figs. 1 through Fig. 7, the embodiment of the present invention provides a kind of power battery cover board component, including pole 10, insulator 20, composite flange 30 and cover board body 40；Above-mentioned pole 10 includes top and bottom, pole 10 between top and bottom arranges the convex hole weld part 11 around pole 10, this weld part 11 includes lower halfpace 113, buffer wall 112 and upper halfpace 111, described lower halfpace 113 is connected with pole 10, lower halfpace 113 connects buffer wall 112 away from the side of pole 10, and buffer wall 112 is also connected with halfpace 111；Above-mentioned upper halfpace 111 apart from the distance of place, the top plane of pole 10 less than the lower halfpace 113 distance apart from place, the top plane of pole 10；Above-mentioned insulator 20 arranges pole installing hole, the bottom of described pole 10 is stretched into along pole installing hole and runs through described insulator 20, the upper surface of upper halfpace 111 and insulator 20 stops that pole 10 continues to slide in pole installing hole, and the lower surface of upper halfpace 111 seals with the upper surface of insulator 20 and welds；The weld of described insulator 20 and described composite flange 30 arranges metal solder coating；Above-mentioned composite flange 30 is positioned at the insulator 20 side away from pole 10 top, and the flange hole of this composite flange 30 and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole 10, and has gap with the hole wall of flange hole；Described composite flange 30 is welded with insulator 20 sealing by described metal solder coating near the weld layer of insulator 20；Arranging composite flange installing hole on above-mentioned cover board body 40, composite flange 30 is installed in composite flange installing hole；Described composite flange 30 welds with the sealing of described cover board body 40 away from the weld layer of insulator 20。
In this enforcement, above-mentioned cover board body 40 generally also can arrange the conventional structure such as liquid injection hole 50 and relief valve 60。
Above-mentioned weld part 11 is general and pole 10 is one-body molded, convenient production, reduces the welding process of weld part 11 and pole 10, anti-in the dead of night better effects if。
Above-mentioned upper halfpace 111 apart from the distance of place, the top plane of pole 10 less than the lower halfpace 113 distance apart from place, the top plane of pole 10, the bottom of pole 10 is stretched into along pole installing hole and runs through described insulator 20, the upper surface of upper halfpace 111 and insulator 20 stops that pole 10 continues to slide in pole installing hole, and the lower surface of upper halfpace 111 seals with the upper surface of insulator 20 and welds。That is descend halfpace 113 and buffer wall 112 can stretch in pole installing hole, and all can have gap with the hole wall of pole installing hole, make buffer wall 112 play the effect of buffering when upper halfpace 111 welds with insulator 20, improve welding yield。When the top of pole 10 is under pressure, the power that buffer wall 112 is stretched under the effect of upper halfpace 111, so buffer wall 112 is unlikely to deform, and upper halfpace 111 directly acts on insulator 20, it is unlikely to deform equally, reduce the slip gradient of insulator 20 and weld part 11 welding position, improve the safety in utilization of power battery cover board component, improve the service life of power battery cover board component。In the present embodiment, pole 10 generally can run through insulator 20 and composite flange 30, is conveniently connected with the pole piece 70 in electrokinetic cell。
Above-mentioned composite flange 30 connects use for transition, makes for metal material。Its one end connects insulator 20, and the other end connects cover board body 40。Composite flange 30 can first weld with insulator 20, welds with cover board body 40 when then in the end assembling, and reduces the technology difficulty that cover board body 40 welds with insulator 20。
With reference to Fig. 3, in the present embodiment, above-mentioned composite flange installing hole is provided with depressed part near the edge of the side of insulator 20, and described composite flange 30 is sticked in depressed part adaptedly。When pole 10 top stress is oppressed, insulator 20 can be passed to by upper halfpace 111, insulator 20 transmits the force to composite flange 30, and the bottom of depressed part can well support composite flange 30, without affecting the weld between composite flange 30 and cover board body 40, prevent both weld generation crackings etc., improve the service life of electrokinetic cell board component, and safety in utilization。
In the present embodiment, the lower surface of above-mentioned upper halfpace 111 is provided with at least one saw-tooth ring 114 around pole 10。Saw-tooth ring 114, when welding with insulator 20, has interlocking, improves bonding area, thus improving the welding stability of upper halfpace 111 and insulator 20。The bar number of saw-tooth ring 114 can be a plurality of, selects according to concrete use environment and welding condition, as arranged 114, three saw-tooth rings 114 of two saw-tooth rings etc.。
In the present embodiment, the upper surface correspondence saw-tooth ring 114 of above-mentioned insulator 20 is arranged at the cannelure 21 around pole 10, cored solder etc. can be preset in cannelure 21, when welding, cored solder melts, and saw-tooth ring 114 stretches in cannelure 21 adaptedly, thus improving bonding area, improve the weld strength between insulator 20 and upper halfpace 111, improve stability and the sealing of welding。When stress compressing in pole 10 top is excessive, the tensile force in oriented pole 10 direction of upper halfpace 111 meeting, after saw-tooth ring 114 is engaged with cannelure 21, it is provided that resistance, thus improving the overall safety in utilization of power battery cover board component, reduces spoilage。
In the present embodiment, above-mentioned insulator 20 is made for ceramic material, have long service life, will not aging, indeformable and aboundresources and the feature such as cost is low, it is possible to use other exhausted gorgeous material is made, such as insulating glass etc.。
In the present embodiment, the multiple structure ring flange that above-mentioned composite flange 30 is formed for different weld layer pressings or welding, the material of the weld layer of each layer is different, the such as bottom of composite flange 30 is for welding with the cover board body 40 of electrokinetic cell, so the material of this layer of weld layer can be chosen as the material identical with cover board body 40 material and makes, or selecting the material easily welded with cover board body 40 to make, welding procedure is simple, and welding is stable；The top of composite flange 30 is for welding with insulator 20, so the material of this layer of weld layer can select the material identical with the metal solder coating of insulator 10 to make, or the material easily welded with the metal solder coating of insulator 10 is made, the technology difficulty welded with insulator 10 can be reduced, improve the stability of welding。
With reference to Fig. 4 and Fig. 5, in the present embodiment, above-mentioned composite flange 30 includes base ring platform 32 and apical ring platform 31；Described base ring platform 32 and the coaxial stacking of apical ring platform 31 are arranged, and the diameter length of apical ring platform 31 is less than the diameter length of base ring platform 32。Base ring platform 32 is the weld layer of a kind of material, and apical ring platform 31 is the weld layer of another kind of material, and two kinds of weld layers can pass through hot or cold rolling be integrated, it is possible to be welded as a whole。
With reference to Fig. 6 and Fig. 7, in another embodiment, above-mentioned composite flange 30 includes base ring platform 32, transition land 33 and apical ring platform 31；Described base ring platform 32, transition land 33 and apical ring platform 31 sequentially coaxially stacking are arranged, the diameter length of the diameter length of described transition land 33 diameter length less than base ring platform 32 and apical ring platform 31。Qualification rate when described transition land 33 and base ring platform 32 weld with the cover plate of electrokinetic cell。In this enforcement, base ring platform 32 is the weld layer of a kind of material, apical ring platform 31 is the weld layer of another kind of material, two kinds of weld layers can pass through hot or cold rolling be integrated, or be welded as a whole, and transition land 33 is one of them ledge of base ring platform 32 or apical ring platform 31, or it is connect after both each ledges to be formed；In other embodiments, transition land 33 can be different from the third material of base ring platform 32 and apical ring platform 31 to make, respectively with base ring platform 32 and apical ring platform 31 pressing or weld。
The power battery cover board component of the present embodiment, the lower halfpace 113 of the weld part 11 on pole 10 stretches into the pole installing hole of insulator 20, and upper halfpace 111 is positioned at the outside of pole installing hole of insulator 20, when the top stress compressing of pole 10, the power that buffer wall 112 is stretched under the effect of upper halfpace 111, so buffer wall 112 is unlikely to deform, and upper halfpace 111 directly acts on insulator 20, it is unlikely to deform equally, reduce the slip gradient of insulator 20 and weld part 11 welding position, improve the safety in utilization of power battery cover board component, improve the service life of power battery cover board component。
With reference to Fig. 8, the embodiment of the present invention also provides for a kind of electrokinetic cell, including pole piece 70, electrolyte, housing 80 and power battery cover board component, described electrolyte, pole piece 70 are contained in housing 80 with in the accommodation space of power battery cover board component formation, and power battery cover board component is connected with pole piece 70 by connecting sheet 90；Described power battery cover board component, including pole 10, insulator 20, composite flange 30 and cover board body 40；Above-mentioned pole 10 includes top and bottom, pole 10 between top and bottom arranges the convex hole weld part 11 around pole 10, this weld part 11 includes lower halfpace 113, buffer wall 112 and upper halfpace 111, described lower halfpace 113 is connected with pole 10, lower halfpace 113 connects buffer wall 112 away from the side of pole 10, and buffer wall 112 is also connected with halfpace 111；Above-mentioned upper halfpace 111 apart from the distance of place, the top plane of pole 10 less than the lower halfpace 113 distance apart from place, the top plane of pole 10；Above-mentioned insulator 20 arranges pole installing hole, the bottom of described pole 10 is stretched into along pole installing hole and runs through described insulator 20, the upper surface of upper halfpace 111 and insulator 20 stops that pole 10 continues to slide in pole installing hole, and the lower surface of upper halfpace 111 seals with the upper surface of insulator 20 and welds；The weld of described insulator 20 and described composite flange 30 arranges metal solder coating；Above-mentioned composite flange 30 is positioned at the insulator 20 side away from pole 10 top, and the flange hole of this composite flange 30 and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole, and has gap with the hole wall of flange hole；Described composite flange 30 is welded with insulator 20 sealing by described metal solder coating near the weld layer of insulator 20；Arranging composite flange installing hole on above-mentioned cover board body 40, composite flange 30 is installed in composite flange installing hole；Described composite flange 30 welds with the sealing of described cover board body 40 away from the weld layer of insulator 20。
In this enforcement, above-mentioned cover board body 40 generally also can arrange the conventional structure such as liquid injection hole 50 and relief valve 60。
Above-mentioned weld part 11 is general and pole 10 is one-body molded, convenient production, reduces the welding process of weld part 11 and pole 10, anti-in the dead of night better effects if。
Above-mentioned upper halfpace 111 apart from the distance of place, the top plane of pole 10 less than the lower halfpace 113 distance apart from place, the top plane of pole 10, the bottom of pole 10 is stretched into along pole installing hole and runs through described insulator 20, the upper surface of upper halfpace 111 and insulator 20 stops that pole 10 continues to slide in pole installing hole, and the lower surface of upper halfpace 111 seals with the upper surface of insulator 20 and welds。That is descend halfpace 113 and buffer wall 112 can stretch in pole installing hole, and all can have gap with the hole wall of pole installing hole, make buffer wall 112 play the effect of buffering when upper halfpace 111 welds with insulator 20, improve welding yield。When the top of pole 10 is under pressure, the power that buffer wall 112 is stretched under the effect of upper halfpace 111, so buffer wall 112 is unlikely to deform, and upper halfpace 111 directly acts on insulator 20, it is unlikely to deform equally, reduce the slip gradient of insulator 20 and weld part 11 welding position, improve the safety in utilization of power battery cover board component, improve the service life of power battery cover board component。In the present embodiment, pole 10 generally can run through insulator 20 and composite flange 30, is conveniently connected with the pole piece 70 in electrokinetic cell。
Above-mentioned composite flange 30 connects use for transition, makes for metal material。Its one end connects insulator 20, and the other end connects cover board body 40。Composite flange 30 can first weld with insulator 20, welds with cover board body 40 when then in the end assembling, and reduces the technology difficulty that cover board body 40 welds with insulator 20。
With reference to Fig. 3, in the present embodiment, above-mentioned composite flange installing hole is provided with depressed part near the edge of the side of insulator 20, and described composite flange 30 is sticked in depressed part adaptedly。When pole 10 top stress is oppressed, insulator 20 can be passed to by upper halfpace 111, insulator 20 transmits the force to composite flange 30, and the bottom of depressed part can well support composite flange 30, without affecting the weld between composite flange 30 and cover board body 40, prevent both weld generation crackings etc., improve the service life of electrokinetic cell board component, and safety in utilization。
In the present embodiment, the lower surface of above-mentioned upper halfpace 111 is provided with at least one saw-tooth ring 114 around pole 10。Saw-tooth ring 114, when welding with insulator 20, has interlocking, improves bonding area, thus improving the welding stability of upper halfpace 111 and insulator 20。The bar number of saw-tooth ring 114 can be a plurality of, selects according to concrete use environment and welding condition, as arranged 114, three saw-tooth rings 114 of two saw-tooth rings etc.。
In the present embodiment, the upper surface correspondence saw-tooth ring 114 of above-mentioned insulator 20 is arranged at the cannelure 21 around pole 10, cored solder etc. can be preset in cannelure 21, when welding, cored solder melts, and saw-tooth ring 114 stretches in cannelure 21 adaptedly, thus improving bonding area, improve the weld strength between insulator 20 and upper halfpace 111, improve stability and the sealing of welding。When stress compressing in pole 10 top is excessive, the tensile force in oriented pole 10 direction of upper halfpace 111 meeting, after saw-tooth ring 114 is engaged with cannelure 21, it is provided that resistance, thus improving the overall safety in utilization of power battery cover board component, reduces spoilage。
In the present embodiment, above-mentioned insulator 20 is made for ceramic material, have long service life, will not aging, indeformable and aboundresources and the feature such as cost is low, it is possible to use other exhausted gorgeous material is made, such as insulating glass etc.。
In the present embodiment, the multiple structure ring flange that above-mentioned composite flange 30 is formed for different weld layer pressings or welding, the material of the weld layer of each layer is different, the such as bottom of composite flange 30 is for welding with the cover board body 40 of electrokinetic cell, so the material of this layer of weld layer can be chosen as the material identical with cover board body 40 material and makes, or selecting the material easily welded with cover board body 40 to make, welding procedure is simple, and welding is stable；The top of composite flange 30 is for welding with insulator 20, so the material of this layer of weld layer can select the material identical with the metal solder coating of insulator 10 to make, or the material easily welded with the metal solder coating of insulator 10 is made, the technology difficulty welded with insulator 10 can be reduced, improve the stability of welding。
With reference to Fig. 4 and Fig. 5, in the present embodiment, above-mentioned composite flange 30 includes base ring platform 32 and apical ring platform 31；Described base ring platform 32 and the coaxial stacking of apical ring platform 31 are arranged, and the diameter length of apical ring platform 31 is less than the diameter length of base ring platform 32。Base ring platform 32 is the weld layer of a kind of material, and apical ring platform 31 is the weld layer of another kind of material, and two kinds of weld layers can pass through hot or cold rolling be integrated, it is possible to be welded as a whole。
With reference to Fig. 6 and Fig. 7, in another embodiment, above-mentioned composite flange 30 includes base ring platform 32, transition land 33 and apical ring platform 31；Described base ring platform 32, transition land 33 and apical ring platform 31 sequentially coaxially stacking are arranged, the diameter length of the diameter length of described transition land 33 diameter length less than base ring platform 32 and apical ring platform 31。Qualification rate when described transition land 33 and base ring platform 32 weld with the cover plate of electrokinetic cell。In this enforcement, base ring platform 32 is the weld layer of a kind of material, apical ring platform 31 is the weld layer of another kind of material, two kinds of weld layers can pass through hot or cold rolling be integrated, or be welded as a whole, and transition land 33 is one of them ledge of base ring platform 32 or apical ring platform 31, or it is connect after both each ledges to be formed；In other embodiments, transition land 33 can be different from the third material of base ring platform 32 and apical ring platform 31 to make, respectively with base ring platform 32 and apical ring platform 31 pressing or weld。
The electrokinetic cell of the present embodiment, the lower halfpace 113 of the weld part 11 on pole 10 stretches into the pole installing hole of insulator 20, and upper halfpace 111 is positioned at the outside of pole installing hole of insulator 20, when the top stress compressing of pole 10, the power that buffer wall 112 is stretched under the effect of upper halfpace 111, so buffer wall 112 is unlikely to deform, and upper halfpace 111 directly acts on insulator 20, it is unlikely to deform equally, reduce the slip gradient of insulator 20 and weld part 11 welding position, improve the safety in utilization of power battery cover board component, improve the service life of power battery cover board component, thus improving the overall safety in utilization of electrokinetic cell and service life。
The foregoing is only the preferred embodiments of the present invention; not thereby the scope of the claims of the present invention is limited; every equivalent structure utilizing description of the present invention and accompanying drawing content to make or equivalence flow process conversion; or directly or indirectly it is used in other relevant technical fields, all in like manner include in the scope of patent protection of the present invention。
Claims (10)
1. a power battery cover board component, it is characterised in that include pole, insulator, composite flange and cover board body；
Described pole includes top and bottom, arranging the convex hole weld part around pole on pole between top and bottom, this weld part includes lower halfpace, buffer wall and upper halfpace, and described lower halfpace is connected with pole, lower halfpace connects buffer wall away from the side of pole, and buffer wall is also connected with halfpace；The distance of place, the top plane of described upper halfpace distance pole is less than the distance of place, the top plane of lower halfpace distance pole；
Described insulator arranges pole installing hole, the bottom of described pole is stretched into along pole installing hole and runs through described insulator, the upper surface of described upper halfpace and insulator stops that pole continues to slide in pole installing hole, and the lower surface of upper halfpace seals with the upper surface of insulator and welds；The weld of described insulator and described composite flange arranges metal solder coating；
Described composite flange is positioned at the insulator side away from pole top, and the flange hole of this composite flange and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole, and has gap with the hole wall of flange hole；Described composite flange is welded with insulator seal by described metal solder coating near the side of insulator；
Arranging composite flange installing hole on described cover board body, composite flange is installed in composite flange installing hole；Described composite flange welds with the sealing of described cover board body away from the side of insulator。
2. power battery cover board component according to claim 1, it is characterised in that described composite flange installing hole is provided with depressed part near the edge of the side of insulator, and described composite flange is sticked in depressed part adaptedly。
3. power battery cover board component according to claim 1, it is characterised in that the lower surface of described upper halfpace is provided with at least one saw-tooth ring around pole。
4. power battery cover board component according to claim 3, it is characterised in that the upper surface correspondence saw-tooth ring of described insulator is arranged at the cannelure around pole。
5. power battery cover board component according to claim 1, it is characterised in that described insulator is that ceramic material is made。
6. power battery cover board component according to claim 1, it is characterised in that described composite flange includes the weld layer of at least two-layer unlike material；
Described composite flange is welded with insulator seal by described metal solder coating near the weld layer of insulator；
Described composite flange welds with the sealing of described cover board body away from the weld layer of insulator。
7. power battery cover board component according to claim 6, it is characterised in that described composite flange includes base ring platform and apical ring platform；
Described base ring platform and the coaxial stacking of apical ring platform are arranged, and the diameter length of apical ring platform is less than the diameter length of apical ring platform。
8. power battery cover board component according to claim 6, it is characterised in that described composite flange includes base ring platform, transition land and apical ring platform；
Described base ring platform, transition land and the sequentially coaxially stacking of apical ring platform are arranged, the diameter length of the diameter length of the described transition land diameter length less than base ring platform and apical ring platform。
9. an electrokinetic cell, it is characterised in that include pole piece, electrolyte, housing and power battery cover board component, described electrolyte, pole piece are contained in the accommodation space of housing and the formation of power battery cover board component；
Described power battery cover board component includes pole, insulator, composite flange and cover board body；
Described pole includes top and bottom, arranging the convex hole weld part around pole on pole between top and bottom, this weld part includes lower halfpace, buffer wall and upper halfpace, and described lower halfpace is connected with pole, lower halfpace connects buffer wall away from the side of pole, and buffer wall is also connected with halfpace；The distance of place, the top plane of described upper halfpace distance pole is less than the distance of place, the top plane of lower halfpace distance pole；
Described insulator arranges pole installing hole, the bottom of described pole is stretched into along pole installing hole and runs through described insulator, the upper surface of described upper halfpace and insulator stops that pole continues to slide in pole installing hole, and the lower surface of upper halfpace seals with the upper surface of insulator and welds；The weld of described insulator and described composite flange arranges metal solder coating；
Described composite flange is positioned at the insulator side away from pole top, and the flange hole of this composite flange and pole installing hole are coaxially disposed, and described flange hole is run through in the bottom of pole, and has gap with the hole wall of flange hole；Described composite flange is welded with insulator seal by described metal solder coating near the side of insulator；
Arranging composite flange installing hole on described cover board body, composite flange is installed in composite flange installing hole；Described composite flange welds with the sealing of described cover board body away from the side of insulator。
10. electrokinetic cell according to claim 9, it is characterised in that the power battery cover board component according to any one of described power battery cover board component such as claim 2-8。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610077985.7A CN105702887A (en) | 2016-02-03 | 2016-02-03 | Cover board assembly for power battery and power battery |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610077985.7A CN105702887A (en) | 2016-02-03 | 2016-02-03 | Cover board assembly for power battery and power battery |
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| CN105702887A true CN105702887A (en) | 2016-06-22 |
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| CN201610077985.7A Pending CN105702887A (en) | 2016-02-03 | 2016-02-03 | Cover board assembly for power battery and power battery |
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