CN105742530A - Battery cover plate assembly, fabrication method thereof, single battery and battery pack - Google Patents
Battery cover plate assembly, fabrication method thereof, single battery and battery pack Download PDFInfo
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- CN105742530A CN105742530A CN201610109010.8A CN201610109010A CN105742530A CN 105742530 A CN105742530 A CN 105742530A CN 201610109010 A CN201610109010 A CN 201610109010A CN 105742530 A CN105742530 A CN 105742530A
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- sealant
- electrode terminal
- cover board
- tubular rivet
- board assembly
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
- H01M50/148—Lids or covers characterised by their shape
- H01M50/15—Lids or covers characterised by their shape for prismatic or rectangular cells
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/04—Construction or manufacture in general
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
- Y02P70/00—Climate change mitigation technologies in the production process for final industrial or consumer products
- Y02P70/50—Manufacturing or production processes characterised by the final manufactured product
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- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Connection Of Batteries Or Terminals (AREA)
Abstract
The invention provides a battery cover plate assembly, a fabrication method thereof, a single battery and a battery pack. The battery cover plate assembly comprises a cover plate, a hollow rivet, an electrode terminal, a sealing layer and an insulation element, wherein the sealing layer is further arranged between the electrode terminal and the insulation element and can be melted with the insulation element in a molten state, and a micropore structure is arranged on a surface which the electrode terminal and the sealing are in contact. In the battery cover plate assembly provided by the invention, the sealing layer is arranged between the electrode terminal and the insulation element, pre-processing is carried out on the electrode terminal, the influence of the deformation, particularly shrinkage of the polymer insulation element caused by various environmental factors such as temperature on the hermetic combination of the electrode terminal and the cover plate is reduced, a bonding force between inorganic metal and an organic polymer is increased, the connection firmness between the electrode terminal and the cover plate is improved, meanwhile, the sealing performance of the cover plate assembly is further improved, and the development demand of an existing battery is met. The invention provides the single battery with more stable performance and the battery pack.
Description
The application is the applying date is on November 28th, 2009, and application number is 200910188461.5, and name is called the divisional application of the Chinese invention patent application of " battery cover board assembly, its preparation method and cell and set of cells ".
Technical field
The present invention relates to field of batteries, more particularly relate to a kind of battery cover board assembly, battery cover board assembly preparation method and containing this battery cover board assembly cell and set of cells.
Background technology
At present, the advantages such as battery is high with its energy, pollution-free, are more widely deployed in the portable electronic products such as mobile phone, digital camera, also serve as the standby energy of the main equipment such as automobile, space station simultaneously, along with it is widely applied, the requirement of its properties is also not only improved.
Battery cover board assembly carrys out sealed cell typically via clamping insulating part between tubular rivet and electrode terminal, or injection binding agent is strengthened sealing on the insulating part contact surface with electrode terminal, insulating part completes typically via direct injection moulding, but this kind of sealing means is also insecure, adhesion between metal and organic polymer is very weak, violent or substantial amounts of process of jolting is likely to come off, cause the seal failure of battery, it is likely to cause electrolyte to leak, cause electric leakage, corrosion, the problems such as capacity attenuation, loosen simultaneously and will also result in electrode terminal and be connected the problem such as loosening with pole piece and also can affect the output performance of battery, the electrode terminal even loosened is likely to be short-circuited in the moving process of battery, bring potential safety hazard etc.；The particularly focus automobile power cell of research now, owing to its duty need to be in mobile even jounce condition, the connectivity robustness of its parts is required higher, and the set of cells used is to be realized serial or parallel connection by multiple batteries by the electrode terminal welding on cover plate, realize power supply, for security consideration, electrode terminal exports the parts of electric current and is connected general tighter with electrode terminal etc., it is easy in battery moving process vibrated, pull, impact, easily cause electrode terminal loosening with the connection of cover plate, the sealing of battery cover board is impacted, the reliability of the connection between cell is impacted, the performance of whole set of cells is impacted.
Summary of the invention
Instant invention overcomes the connection of the electrode of the battery cover board assembly of prior art and cover plate firm not, sealing property is not ideal enough, it is easy in transport and use procedure, electrode occurs to loosen, affect the output of battery, security performance etc. problem.
Provide a kind of battery cover board assembly, including cover plate, tubular rivet, electrode terminal, sealant and insulating part；
Described cover plate is provided with through hole, and tubular rivet is arranged on the cover board, and the hollow space of described tubular rivet communicates with through hole；
Described insulating part is positioned at tubular rivet；
Described electrode terminal is through insulating part, and tubular rivet clamping insulating part is with insulated enclosure electrode terminal；
Wherein, it is additionally provided with sealant, described sealant and insulating part between described tubular rivet and insulating part in the forming process of described insulating part, produces fusion；
The face that described tubular rivet contacts is furnished with microcellular structure, the surface combination of described sealant and the tubular rivet being furnished with described microcellular structure with sealant.
Wherein, the present invention is provided with sealant between tubular rivet and insulating part, sealant can cover the face that whole tubular rivet contacts with insulating part, can also be that part covers the face that contacts with insulating part of tubular rivet, it might even be possible to be that the surface covering whole tubular rivet only need to ensure to have between tubular rivet and insulating part sealant.The present invention even can arrange female seat groove on tubular rivet, after the inner surface of female seat groove is carried out surface treatment, injection moulding insulating part after sealant is set inside female seat groove, it is ensured that sealant is melted with insulating part to be combined, this kind of structure is not take up battery volume, strengthens being tightly connected property.Tubular rivet is preferably directly carried out surface treatment by the present invention, after sealant is set, increase the fastness being tightly connected, and prevent the electric conductivity of the impact, particularly electrode terminal on battery such as insulating part deformation and thermal diffusivity from not resulting in impact.
The battery cover board assembly of the present invention by arranging sealant and tubular rivet being carried out pre-treatment between tubular rivet and insulating part, decrease the deformation that polymer insulation part causes because of various environmental factorss such as temperature etc. and particularly reduce the impact on tubular rivet Yu the sealing associativity of cover plate, increase the adhesion of inorganic metal and organic polymer, not only increase the connectivity robustness of tubular rivet and cover plate, also further enhance the sealing property of cover plate assembly simultaneously, meet the growth requirement of existing battery.Vibration that welding etc. the connects impact on cell sealing-structure can be reduced, reduce the mobile impact jolted etc. on cell sealing-structure, reduce the decline loosening the output performance of battery, the security performance etc. that are likely to result in.Emphasis solves the electrokinetic cell of the existing electric automobile being chronically at the environment that jolts, easily occur that cover plate assembly seals loosening grade for difficulties, ensure that its output performance, security performance etc., it is ensured that its stability, the large-scale application for electric motor car is laid a good foundation further.
The preparation method that it is a further object to provide above-mentioned battery cover board assembly, including: sealant is set on the inner surface of tubular rivet and first tubular rivet need to be arranged the face of sealant carries out surface treatment and make it be furnished with microcellular structure；
Being arranged on the cover board by tubular rivet, the hollow space of tubular rivet communicates with through hole；
Hollow space by electrode terminal traverse tubular rivet；
Injection moulding insulating part between sealant and electrode terminal, makes described sealant and the fusion of described insulating part.
The preparation method of the present invention, simple easily realization, it is beneficial to large-scale production.
It is more excellent that 3rd purpose of the present invention is to provide a kind of sealing property, security performance and the better cell of output performance, including battery cover board assembly, housing, pole piece and electrolyte；Pole piece and electrolyte are encapsulated in the sealing space of housing and battery cover board assembly formation；Battery cover board assembly upper electrode terminal one end electrically connects with pole piece, and the other end stretches out outside sealing space as battery electrode, and wherein, battery cover board assembly is above-mentioned battery cover board assembly.
4th purpose of the present invention is to provide a kind of set of cells using above-mentioned battery, consists of serial or parallel connection including above-mentioned cell, serial or parallel connection by the overlap joint of electrode terminal, docking or flange to fetching realization.
The cell of the present invention and the stable performance of set of cells, more it is avoided that the impact on the performance of battery of the extraneous irresistible factor, ensure that the normal use of battery, meet the growth requirement of prior art, in particular, provide the automobile power cell that can guarantee that output stability energy and security performance of a kind of function admirable.
Accompanying drawing explanation
Fig. 1 is the surface Electronic Speculum figure of the electrode terminal of the present invention；
Fig. 2 is the structural representation of a kind of preferred implementation of the battery cover board assembly of the present invention；
Fig. 3 is the structural representation of the another kind of preferred implementation of the battery cover board assembly of the present invention；
The top view of the battery cover board assembly of Fig. 4 present invention.
Detailed description of the invention
In order to make technical problem solved by the invention, technical scheme and beneficial effect clearly understand, below in conjunction with drawings and Examples, the present invention is further elaborated.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.
Instant invention overcomes the connection of the electrode of the battery cover board assembly of prior art and cover plate firm not, sealing property is not ideal enough, it is easy in transport and use procedure, electrode occurs to loosen, affect the output of battery, security performance etc. problem.Providing a kind of electrode more firm with the sealing of cover plate, sealing property is more excellent, can meet the battery cover board assembly of the requirement of the Large-scale Mobile equipment such as automobile especially, including cover plate, tubular rivet, electrode terminal, sealant and insulating part；Cover plate is provided with through hole, and tubular rivet is arranged on the cover board, and the hollow space of tubular rivet communicates with through hole；Insulating part is positioned at tubular rivet；Electrode terminal is through insulating part, and tubular rivet clamping insulating part is with insulated enclosure electrode terminal；Wherein, being additionally provided with sealant between electrode terminal and insulating part, sealant can fuse with insulating part in the molten state mutually；The face that electrode terminal contacts with sealant is furnished with microcellular structure.Electrode terminal is carried out surface treatment by the present invention, after sealant is set, and sealant can fuse mutually with insulating part, adds the fastness being tightly connected, and prevent the electric conductivity of the impact, particularly electrode terminal on battery such as insulating part deformation and thermal diffusivity from not resulting in impact.The battery cover board assembly of the present invention can reduce vibration that welding etc. the connects impact on cell sealing-structure, reduces the mobile impact jolted etc. on cell sealing-structure, reduces the decline loosening the output performance of battery, the security performance etc. that are likely to result in.
Further, the present invention, preferably in being additionally provided with sealant between tubular rivet and insulating part, improves sealing property further, same it is also preferred that sealant can fuse with insulating part in the molten state mutually, and the face that tubular rivet contacts with sealant is furnished with microcellular structure.Sealant can cover the face that whole tubular rivet contacts with insulating part, it is also possible to is that part covers the face that contacts with insulating part of tubular rivet, need to ensure that the inner surface of tubular rivet has sealant.
The preferred tubular rivet of the present invention and cover plate are structure as a whole, and can pass through casting etc. and be formed, further enhance adaptation.Preferred insulating part forms spacer ring by cover plate through hole at cover plate lower surface, strengthens sealing property, reduces the possibility of short circuit, improves security performance further.Preferred insulating part is formed by injection moulding in tubular rivet, and injection moulding is generally high-temperature fusion and injects molding, and namely preferably sealant and insulating part can produce fusion in the forming process of insulating part, strengthens sealing property, and method simply easily realizes.
Wherein, the material of insulating part and sealant can be the same or different, it is possible to is independently selected from one or more in the perfluoroalkyl alkoxy copolymer of injection grade, Poly-s 179, polyphenylene sulfide, modified polypropylene, ethylene propylene diene rubber, epoxy resin, phenol aldehyde modified epoxy resin, bi-component epoxide-resin glue or PUR；Wherein, sealant is the dense seal layer formed after above-mentioned material heating molten sintering, can pass through sintering after the injection moulding of surface treated metal surface, hot pressing, spraying or coating above-mentioned material that needs contact with sealant and be formed.
In order to improve levelability and the adhesion of sealant further, the preferred sealant of the present invention can also add filler, one or more in filler more preferably nanometer titanium dioxide, nano aluminium oxide and graphite powder etc., it is possible to adopt conventional method to be scattered in sealant.
Wherein, the micropore size of microcellular structure is preferably 10nm～2 μm, and micropore hole depth is preferably 20～2 μm, improves the binding ability of inorganic metal and organic polymer further, improves sealing property.
Wherein, the various electric conductors that electrode terminal is known to the skilled person, one or more in copper, aluminum, nickel, gold, silver of material, it is possible to carry out selection according to the model of battery and determine.Wherein, metal electrode terminal need to arranging the surface of sealant and carry out surface treatment before arranging sealant, surface treatment makes the surface that electrode terminal need to arrange sealant be covered with microcellular structure.Surface treatment can be the surface to whole electrode terminal, can also be that the face that only need to contact with sealant is carried out surface treatment, can even is that the part surface that need to contact with sealant carries out surface treatment, only need to ensure that the face that electrode terminal contacts with sealant is provided with microcellular structure, strengthen the associativity of metal and sealant.
The rivet of the various hollows that tubular rivet is known to the skilled person, one or more in copper, aluminum, nickel, gold, silver of material.Metal hollow rivet need to arranging the surface of sealant and carry out surface treatment before arranging sealant, surface treatment makes the surface that tubular rivet need to arrange sealant be covered with microcellular structure.Same surface treatment can be the inner surface to whole tubular rivet, can also be that the face that only need to contact with sealant is carried out surface treatment, can even is that the part surface that need to contact with sealant carries out surface treatment, only need to ensure that the face that tubular rivet contacts with sealant is provided with microcellular structure, strengthen the associativity of metal and sealant.
The surface treatment of the present invention can include surface etching treatment.Wherein, surface etching treatment can preferred one or more in electrochemical etching, soda acid etching or oxidant etching, improve the adhesion of metal and organic polymer.For apply wide aluminium material electrode terminal can preferred acid alkaline etching, strong acid such as hydrochloric acid both can have been adopted can also to adopt highly basic such as sodium hydroxide that electrode terminal is performed etching；For existing performance preferably copper, nickel, rustless steel, oxidizing solution such as sulphuric acid-hydrogen peroxide or the persulfate solution etc. of moderate strength can be preferably employed carry out oxidant etching by the material electrode terminal such as valve alloy.The present invention can also include metal is carried out pretreatment before surface treatment, the various process that pretreatment is known to the skilled person, generally comprise metal is polished, cleaning etc., improve cleannes etc..
The preferred tubular rivet of the present invention is additionally provided with the reinforcement increasing intensity, reinforcement can bond strength between composite enhancement and rivet, and and then improve the sealing of set of cells.On electrode terminal, equally spaced distribution has for strengthening and the process structure of sealant or insulating part associativity, and this process structure is distributed on the sheet-like plane of electrode terminal equally spacedly, and the cross section of penetrating electrode terminal.Process structure can be arbitrary shape and size.Wherein, conveniently of circular shape, square, rhombus.
Preferred electrode terminal of the present invention is pellet electrode terminal, reduces internal resistance, is also beneficial to when forming set of cells, and the welding of electrode terminal can be realized by modes such as laminatings, also can reduce contact internal resistance between cell, and the electrode terminal after welding not easily loosens；Additionally, the set of cells of the present invention adopts plates as electrode terminal, it is not necessary to additionally increase connector, it is possible to directly welded by electrode terminal, it is thereby possible to reduce the weight and volume of set of cells.The thickness of electrode terminal can need according to the kind of battery and preparation and determine, and according to specific embodiments of the present invention, the thickness of the electrode terminal being generally adopted is 0.2-20 millimeter, it is preferable that 2.5 millimeters.The present invention is for reducing the internal resistance of cell further, increase electric current and heat conduction path, preferred battery cover plate assembly at least contains the electrode terminal of two same polarities, namely multiple electrode terminals derive the electric current of same polarity, in order to reduce welding etc., it may be preferred to the bottom of two or more electrode terminals is connected and makes two U-shaped structures of electrode tip subgroup, be made of one structure by the electrode terminal of multiple same polarities, casting etc. can be passed through be directly prepared into, be also beneficial to assembling and the preparation of battery.
The preparation method that invention also provides above-mentioned battery cover board assembly, including: at the surface configuration sealant of electrode terminal and first electrode terminal need to be arranged the surface of sealant carry out surface treatment and make it be furnished with microcellular structure；Being arranged on the cover board by tubular rivet, the hollow space of tubular rivet communicates with through hole；The electrode terminal being provided with sealant is at least partially in tubular rivet through the sealant on the hollow space and guarantee electrode terminal of tubular rivet；Injection moulding insulating part between sealant and tubular rivet.The high temperature of injection moulding makes sealant and insulating part be in molten condition, viscous state insulator material and the melting sealed layer surface fusion being in contact with it under the high temperature conditions, can form fine and close connection after insulating part cools down with sealant, the temperature of general high-temperature injection is preferably 340-390 DEG C.
The present invention includes being coated with sealant material at the inner surface of the surface treated tubular rivet with microcellular structure preferably in arranging sealant on the inner surface of tubular rivet, heats to sealant material molten, and sintering forms sealant.
Arrange the mode of sealant to adopt and well known to a person skilled in the art various mode, such as injection moulding, hot pressing, spraying or coating etc., wherein, injection moulding or hot pressing directly can form sealant in metal surface, by the heated mould temperature fusing point slightly above sealant material, make material viscous state, fully can be combined with the metal surface after surface treatment by sealant after pressurizeing；The spraying of routine or coating can also be adopted containing the slurry of sealant material, and melted to sealant material of post-heating, sintering forms fine and close sealant, spraying or be coated with and can adopt the instruments such as spray gun, hairbrush, galley.
The vitrification point of the preferred sealant material of the present invention is 260-280 DEG C, and the temperature of sintering is 320-390, and the time is 20-30 minute.
It is described in further detail in conjunction with accompanying drawing and can be
Embodiment 1
As it is shown in figure 1, cover plate assembly includes electrode terminal 1, insulating part 2, tubular rivet 3, cover plate 4 and sealant 5, cover plate 4 is provided with through hole.The inner surface of tubular rivet 3 etches 20 minutes through concentrated hydrochloric acid soda acid, formed surface have 10nm-1 μm micropore size distribution, the microcellular structure of mean pore hole depth of 50nm-2 μm, after the inner surface of tubular rivet 3 is coated with the nmp solution of deployed oligomer coating macromolecular material PPS, after drying, 340 degree of heating temperatures, to the melt polymer material of coating, sinter 30 minutes afterwards to forming dense seal layer 5.After inner surface is communicated with through hole on cover plate 4 with the hollow space of the tubular rivet 3 of sealant 5, structure integrally welded with cover plate 4.Aluminum electrode terminal 1 is etched 15 minutes through concentrated hydrochloric acid soda acid, form surface and there is the micropore size distribution of 10nm-1 μm, the microcellular structure of the micropore hole depth of 50nm-2 μm, the surface of the part need to being tightly connected with cover plate 4 by electrode terminal 1 is coated with the nmp solution of deployed oligomer coating macromolecular material PPS, after drying, heating is to 380 DEG C, melt polymer material, sintering 250min is to forming dense seal layer 5, electrode terminal 1 with sealant 5 is passed the through hole on tubular rivet 3 and cover plate 4. then in tubular rivet 3 and cover plate 4 through hole, inject sealing macromolecular material PPS with 380 DEG C of temperature, in the through hole of tubular rivet 3 and cover plate 4, injection moulding forms insulating part 2, now electrode terminal 1 is injection-moulded in insulating part 2.For the linking intensity between intensifier electrode terminal 1 and insulating part 2, electrode terminal 1 has the process structure 11 increased with insulant adhesion strength.This process structure 11 is distributed in the upper of electrode terminal 1 cross section of penetrating electrode terminal 2 equally spacedly.Cover plate 4 is additionally provided with liquid injection hole, for passing into electrolyte in housing, if the battery of battery two ends extraction electrode terminal, only need at one end cover plate arranges note hole at night.
Embodiment 2
Such as Fig. 2, cover plate assembly includes electrode terminal 1, insulating part 2, tubular rivet 3, cover plate 4 and sealant 5, and cover plate 4 is provided with through hole.The inner surface of tubular rivet 3 etches 20 minutes through concentrated hydrochloric acid soda acid, form surface and there is the microcellular structure of the micropore size distribution of 50nm-2 μm, the micropore hole depth of 200nm-2 μm, the inner surface of tubular rivet 3 is coated with the aqueous solution of deployed oligomer coating macromolecular material PPS, dry, heating to 320 DEG C of melt polymer materials, sintering 30min is to forming dense seal layer 5.Surface circle female seat grooves 6 at quarter two in the part that aluminum electrode terminal 1 need to be tightly connected with cover plate 4,15 minutes are etched through concentrated hydrochloric acid soda acid, form surface and there is the micropore size distribution of 50nm-2 μm, the microcellular structure of the micropore hole depth of 200nm-2 μm, female seat groove 6 is filled the aqueous solution of deployed oligomer coating macromolecular material PPS, after drying, heating temperatures is to 350 DEG C of melt polymer materials, and sintering 25min is to being formed around all annular dense seal layer 5 of electrode terminal 1 liang.Electrode terminal 1 with sealant is passed the through hole on tubular rivet 3 and cover plate 4. then in tubular rivet 3 and cover plate 4 through hole, 350 DEG C of temperature inject insulation macromolecular material PPS, in the through hole of tubular rivet 3 and cover plate 4, injection moulding forms insulating part 2, and now electrode terminal 1 is injection-moulded in insulating part 2.For the linking intensity between intensifier electrode terminal 1 and insulating part 2, electrode terminal 1 has the process structure 11 increased with encapsulant adhesion strength.This process structure 11 is distributed in the upper of electrode terminal 1 cross section of penetrating electrode terminal 2 equally spacedly.Cover plate 4 is additionally provided with liquid injection hole, for passing into electrolyte in housing.
The preparation method of the present invention, simple easily realization, it is beneficial to large-scale production.
It is more excellent that the present invention also provides for a kind of sealing property simultaneously, and security performance and output performance better contain the battery of above-mentioned cover plate assembly, including battery cover board assembly, housing, pole piece and electrolyte；Pole piece and electrolyte are encapsulated in the sealing space of housing and battery cover board assembly formation；Battery cover board assembly upper electrode terminal one end electrically connects with pole piece, and the other end stretches out outside sealing space as battery electrode.Wherein electrode terminal includes anode and cathode terminals, and anode and cathode terminals can directly be connected with the positive/negative plate of pole piece derives reversal, for instance, it is possible to positive terminal is welded with anode pole piece, negative terminal is welded with cathode pole piece.Under preferable case, anode pole piece also having positive pole ear, positive pole ear is connected with positive terminal, and therefore, anode pole piece is connected with positive terminal by positive pole ear；Having negative lug on cathode pole piece, negative lug is connected with negative terminal, and therefore, cathode pole piece is connected with negative terminal by negative lug.Positive pole ear and negative lug can be various conductive material, it is preferred to one or more in copper, nickel and aluminum.Under preferable case, the part that positive pole ear is connected with positive terminal is identical material, and the part that negative lug is connected with negative terminal is identical material.Electrode terminal preferably welds with the connected mode of pole piece with lug and lug, for instance supersonic welding, cold welding, Laser Welding, soldering, flash butt welding, friction welding (FW), electric resistance welding.The structure of positive/negative plate, pole piece, housing, electrolyte etc. have been conventionally known to one of skill in the art, do not repeat them here.
The preferred housing of the present invention is the cuboid of both ends open, and both ends open is sealed by two battery cover board assemblies, respectively as the positive pole of battery, negative pole, draws from the both sides of battery, and namely electrode terminal is from the two ends extracted current of battery.
The present invention also provides for a kind of set of cells using above-mentioned cell equally, formed by serial or parallel connection including above-mentioned cell, can by realizing the serial or parallel connection between multiple cell by the electrode terminal of connection cell in a different manner, such as series connection can be that the negative terminal of cell being positioned at one end connects with the positive terminal of adjacent cell, or the positive terminal of cell being positioned at one end connects with the negative terminal of adjacent cell, the like, the opposite polarity pair of electrodes terminal welding of two adjacent cells, thus the two of the two ends of the set of cells obtained cells are respectively arranged with an electrode terminal and are not connected with other electrode terminal, and the opposite polarity of the two electrode terminal, both positive and negative polarity as set of cells.Connection between electrode terminal can be overlap joint, docking or flange docking, it is possible to passes through laminating type, it is preferable that in situation, then welds.Welding can be existing various welding method, for instance cold welding, supersonic welding, Laser Welding, soldering, flash butt welding, friction welding (FW), electric resistance welding etc., it is preferred to use cold welding.Use cold welding only to need to provide enough static pressures just can realize reliable welding, and it is little, shockproof and without relative displacement to be welded object caloric value in welding process.
After multiple cells are connected, according to existing method, set of cells can also be fixed, for instance, between adjacent cell, radiator structure is set, and use fastening structure to be fixed together by the cell after connection, it is prevented that occur position to move between cell.
The battery of the present invention and the stable performance of set of cells, more it is avoided that the impact on the performance of battery of the extraneous irresistible factor, ensure that the normal use of battery, meet the growth requirement of prior art, in particular, provide the automobile power cell that can guarantee that output stability energy and security performance of a kind of function admirable.
The foregoing is only presently preferred embodiments of the present invention, not in order to limit the present invention, all any amendment, equivalent replacement and improvement etc. made within the spirit and principles in the present invention, should be included within protection scope of the present invention.
Claims (22)
1. a battery cover board assembly, including cover plate, tubular rivet, electrode terminal, sealant and insulating part；
Described cover plate is provided with through hole, and tubular rivet is arranged on the cover board, and the hollow space of described tubular rivet communicates with through hole；
Described insulating part is positioned at tubular rivet；
Described electrode terminal is through insulating part, and tubular rivet clamping insulating part is with insulated enclosure electrode terminal；
It is characterized in that, be additionally provided with sealant, described sealant and insulating part between described tubular rivet and insulating part in the forming process of described insulating part, produce fusion；
The face that described tubular rivet contacts is furnished with microcellular structure, the surface combination of described sealant and the tubular rivet being furnished with described microcellular structure with sealant.
2. battery cover board assembly according to claim 1, it is characterised in that be additionally provided with sealant between described electrode terminal and insulating part, sealant and insulating part between described electrode terminal and insulating part produce fusion in the forming process of described insulating part；
The face that described electrode terminal contacts is furnished with microcellular structure, the surface combination of the sealant between described electrode terminal and insulating part and the electrode terminal being furnished with described microcellular structure with corresponding sealant.
3. battery cover board assembly according to claim 1 and 2, it is characterised in that described tubular rivet and cover plate are structure as a whole；
Described insulating part forms spacer ring by cover plate through hole at cover plate lower surface, and described insulating part is formed by injection moulding in tubular rivet；
Described electrode terminal is positioned in the part of tubular rivet and is provided with at least one female seat groove.
4. battery cover board assembly according to claim 3, it is characterized in that, the material of described insulating part and sealant is independently selected from one or more in perfluoroalkyl alkoxy copolymer, Poly-s 179, polyphenylene sulfide, modified polypropylene, ethylene propylene diene rubber, epoxy resin, phenol aldehyde modified epoxy resin, bi-component epoxide-resin glue or PUR.
5. battery cover board assembly according to claim 4, it is characterised in that be also dispersed with filler in described sealant, one or more in nanometer titanium dioxide, nano aluminium oxide and graphite powder of described filler.
6. battery cover board assembly according to claim 1 and 2, it is characterised in that the micropore size of described microcellular structure is 10nm～2 μm, micropore hole depth is 20～2 μm.
7. battery cover board assembly according to claim 1, it is characterised in that be provided with the reinforcement increasing intensity on described tubular rivet；On described electrode terminal, equally spaced distribution has for strengthening and the process structure of sealant or insulating part associativity.
8. battery cover board assembly according to claim 1, it is characterised in that described electrode terminal is pellet electrode terminal；Described battery cover board assembly at least contains the electrode terminal of two same polarities.
9. the preparation method of a battery cover board assembly, it is characterised in that including:
The inner surface of tubular rivet arranges sealant and first tubular rivet need to be arranged the face of sealant carries out surface treatment and make it be furnished with microcellular structure；
Being arranged on the cover board by tubular rivet, the hollow space of tubular rivet communicates with through hole；
Hollow space by electrode terminal traverse tubular rivet；
Injection moulding insulating part between sealant and electrode terminal, makes described sealant and the fusion of described insulating part.
10. the preparation method of battery cover board assembly according to claim 9, it is characterized in that, the inner surface of tubular rivet arranges sealant include being coated with sealant material at the inner surface of the surface treated tubular rivet with microcellular structure, heating to sealant material molten, sintering forms sealant.
11. the preparation method of battery cover board assembly according to claim 10, it is characterised in that described coating sealant material includes the inner surface of the surface treated tubular rivet with microcellular structure is coated with oligomer macromolecular material PPS.
12. the preparation method of battery cover board assembly according to claim 11, it is characterised in that described coating oligomer macromolecular material PPS includes aqueous solution or the nmp solution of coating oligomer macromolecular material PPS.
13. the preparation method of battery cover board assembly according to claim 9, it is characterised in that preparation method also includes:
Between sealant and electrode terminal before injection moulding insulating part, at the surface configuration sealant of electrode terminal and first electrode terminal need to be arranged the surface of sealant carry out surface treatment and make it be furnished with microcellular structure, it is at least partially in being provided with the electrode terminal of sealant in tubular rivet through the hollow space of tubular rivet and the sealant that ensures on electrode terminal.
14. the preparation method of battery cover board assembly according to claim 13, it is characterized in that, surface configuration sealant at electrode terminal includes the surface-coated sealant material at the surface treated electrode terminal with microcellular structure, heating to sealant material molten, sintering forms sealant.
15. the preparation method of battery cover board assembly according to claim 14, it is characterized in that, described coating sealant material includes the surface coating oligomer macromolecular material PPS of the part being connected at the surface treated electrode terminal needs with microcellular structure with described cover plate for sealing.
16. the preparation method of battery cover board assembly according to claim 15, it is characterised in that described coating oligomer macromolecular material PPS includes aqueous solution or the nmp solution of coating oligomer macromolecular material PPS.
17. according to claim 10 to 12, the preparation method of battery cover board assembly described in any one in 14 to 16, it is characterized in that, described sealant material includes polymer, one or more in perfluoroalkyl alkoxy copolymer, Poly-s 179, polyphenylene sulfide, modified polypropylene, ethylene propylene diene rubber, epoxy resin, phenol aldehyde modified epoxy resin, bi-component epoxide-resin glue or PUR of described polymer.
18. according to claim 10 to 12, the preparation method of battery cover board assembly described in any one in 14 to 16, it is characterised in that the temperature of described sintering is 320-390 DEG C, and the time is 20-30 minute；
The temperature of described injection moulding is 340-390 DEG C.
19. the preparation method of the battery cover board assembly according to any one in claim 9 to 16, it is characterised in that one or more in copper, aluminum, nickel, gold, silver of the material of described electrode terminal；One or more in copper, aluminum, nickel, gold, silver of the material of described tubular rivet；
Described surface treatment includes surface etching treatment；One or more in electrochemical etching, soda acid etching or oxidant etching of described surface etching treatment.
20. a cell, including battery cover board assembly, housing, pole piece and electrolyte；
Described pole piece and electrolyte are encapsulated in the sealing space of described housing and battery cover board assembly formation；Battery cover board assembly upper electrode terminal one end electrically connects with pole piece, and the other end stretches out outside sealing space as battery electrode, it is characterised in that described battery cover board assembly is the battery cover board assembly in claim 1-8 described in any one.
21. cell according to claim 20, it is characterised in that: described housing is the cuboid of both ends open, and both ends open is sealed by two battery cover board assemblies, respectively as the positive pole of battery, negative pole, draws from the both sides of battery.
22. a set of cells, the cell described in claim 20 or 21 consists of serial or parallel connection, and described serial or parallel connection is realized by the connection of electrode terminal.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610109010.8A CN105742530B (en) | 2009-11-28 | 2009-11-28 | Battery cover board assembly, preparation method and single battery and battery pack |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610109010.8A CN105742530B (en) | 2009-11-28 | 2009-11-28 | Battery cover board assembly, preparation method and single battery and battery pack |
| CN200910188461.5A CN102082244B (en) | 2009-11-28 | 2009-11-28 | Battery cover board assembly, its preparation method and cell and set of cells |
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| CN200910188461.5A Division CN102082244B (en) | 2009-11-28 | 2009-11-28 | Battery cover board assembly, its preparation method and cell and set of cells |
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| CN105742530A true CN105742530A (en) | 2016-07-06 |
| CN105742530B CN105742530B (en) | 2019-02-01 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102021205024A1 (en) | 2021-05-18 | 2022-11-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Lid assembly of a battery cell housing, method for its manufacture and use of such |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1134076C (en) * | 2001-01-14 | 2004-01-07 | 深圳市雄韬电源科技有限公司 | Cell terminal seal technology for structure |
| WO2006009030A1 (en) * | 2004-07-15 | 2006-01-26 | Dai Nippon Printing Co., Ltd. | Semiconductor device and semiconductor device producing substrate and production methods therefor |
| JP5066834B2 (en) * | 2006-05-23 | 2012-11-07 | トヨタ自動車株式会社 | Alkaline storage battery |
| CN101315990B (en) * | 2007-05-29 | 2010-06-09 | 上海比亚迪有限公司 | Battery |
| CN101388445B (en) * | 2007-09-10 | 2010-12-08 | 比亚迪股份有限公司 | Battery set |
| CN201270263Y (en) * | 2008-09-27 | 2009-07-08 | 浙江南都电源动力股份有限公司 | Connecting structure for pole column and cell cover of lead acid accumulator |
| CN201315328Y (en) * | 2008-11-07 | 2009-09-23 | 深圳市比克电池有限公司 | Lithium battery |
| CN102082244B (en) * | 2009-11-28 | 2016-06-15 | 上海比亚迪有限公司 | Battery cover board assembly, its preparation method and cell and set of cells |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| DE102021205024A1 (en) | 2021-05-18 | 2022-11-24 | Robert Bosch Gesellschaft mit beschränkter Haftung | Lid assembly of a battery cell housing, method for its manufacture and use of such |
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