CN110739416A - optimized novel lithium battery cover plate assembly - Google Patents

optimized novel lithium battery cover plate assembly Download PDF

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Publication number
CN110739416A
CN110739416A CN201911082476.3A CN201911082476A CN110739416A CN 110739416 A CN110739416 A CN 110739416A CN 201911082476 A CN201911082476 A CN 201911082476A CN 110739416 A CN110739416 A CN 110739416A
Authority
CN
China
Prior art keywords
aluminum sheet
pole
cover plate
lithium battery
battery cover
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN201911082476.3A
Other languages
Chinese (zh)
Inventor
张振朋
赵永锋
许飞
李娟�
罗传军
赵红娟
杨阳
白方磊
别深超
刘奇
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Multi-Fluorine New Energy Technology Co Ltd
Original Assignee
Multi-Fluorine New Energy Technology Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Multi-Fluorine New Energy Technology Co Ltd filed Critical Multi-Fluorine New Energy Technology Co Ltd
Priority to CN201911082476.3A priority Critical patent/CN110739416A/en
Publication of CN110739416A publication Critical patent/CN110739416A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10—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
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/05—Accumulators with non-aqueous electrolyte
    • H01M10/052—Li-accumulators
    • 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
    • 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
    • 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

Abstract

The invention relates to an optimized novel lithium battery cover plate component, which comprises a smooth aluminum sheet, wherein an explosion-proof valve is arranged in the center of the smooth aluminum sheet, lower injection molds are connected to the lower sides of the two ends of the smooth aluminum sheet, a positive pole post is arranged on the right side of the lower injection mold positioned on the lower side of the left part of the smooth aluminum sheet, a liquid injection hole is arranged on the right side of the explosion-proof valve, a negative pole post is arranged on the left side of the lower injection mold positioned on the lower side of the right part of the smooth aluminum sheet, PPS (polyphenylene sulfide) is injected on the positive pole post, negative injection mold is arranged on the upper side of the outer part of the negative pole post, and sealing rings are arranged between the positive pole post, the negative pole post and the smooth aluminum sheet.

Description

optimized novel lithium battery cover plate assembly
Technical Field
The invention belongs to the technical field of batteries, and particularly relates to optimized novel lithium battery cover plate assemblies.
Background
Along with the strong support of the country to new energy, the research and development of lithium batteries with various excellent performances are carried out regularly, how to improve the energy density of the lithium batteries in a limited space is the most important factor in the research and development of the batteries, the structure of the traditional lithium battery cover plate assembly adopts clamp spring sealing, rivet riveting or injection molding sealing, the clamp spring sealing is rarely used due to the defects of complex assembly, high cost and the like, the injection molding structure has the advantages of simple process, stable quality and the like, is widely applied, the injection molding is that a sealing ring on a positive pole sleeve, a negative pole sleeve passes through an aluminum sheet, then positive pole PPS (conductive) and negative pole PPS (insulating) are used for injection molding, the circumferential surface of a pole is subjected to groove milling treatment, the PPS is matched with a pole groove to meet the requirement of the push-pull force in the Z direction of the cover plate, but a conductive strip is welded on the pole subsequently, so that the vertical distance between the pole groove and the top surface of the pole is required, the pole groove is high, the pole groove is also has high design height requirement on the vertical direction of the sealing ring and the pole groove on the vertical direction, so that the total space of the battery is not only the limit of the design of the battery, but also has the maximum safety of the limit of the battery, the safety of the battery, the maximum safety of the battery, the battery is also can be provided, the limit of the safety of the battery, the battery.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides optimized novel lithium battery cover plate assemblies which are simple in structure, safe, reliable, high in space utilization rate, low in cost and capable of improving the battery capacity.
novel lithium battery cover plate components, including the smooth aluminum sheet, the smooth aluminum sheet center of the explosion-proof valve, the smooth aluminum sheet both ends under connected with the lower injection molding, the smooth aluminum sheet left side of the right injection molding right side is provided with the positive pole, the explosion-proof valve right side is provided with the injection hole, the smooth aluminum sheet right side of the lower injection molding left side of the lower injection molding of negative pole is provided with the negative pole, the positive pole of the upper side of the positive pole of the upper side is provided with positive pole injection molding PPS, the negative pole of the external upper side of the negative pole of the upper side injection molding, the positive pole and negative pole and the.
The anode is injection-molded with PPS2, the PPS2 is polyphenylene sulfide added with black conductive substances, the cathode is injection-molded with PPS4, and the PPS4 is earthy yellow polyphenylene sulfide which is insulated and non-conductive.
The anode pole is made of AL1060-H14, and the cathode pole is made of AL1060-H14+ CuT 2.
The roller embossing treatment is carried out on the upper half parts of the anode pole and the cathode pole, the roller embossing depth is 1-2mm, and the roller embossing height is 2-2.5 mm.
The lower injection molding is formed by ultrasonically melting on an aluminum sheet, and the lower injection molding is made of PP.
The height of the positive pole column and the negative pole column which are arranged on the smooth aluminum sheet exceeds 2.5-3 mm.
The compression amount of the sealing ring is 30% -40%, and the sealing ring is made of polyurethane.
The torque of the positive pole post and the negative pole post subjected to the roll knurling treatment is not less than 6 N.M, and the Z-direction thrust of the positive pole post and the negative pole post is not less than 3500N.
The invention has the beneficial effects that: the circumference of the anode pole and the cathode pole is processed by a knurling process, so that grooving on the pole surface is avoided, the risk that laser heat penetrates through a groove when a conductive strip is welded on the top surface of the pole is avoided, the length of the pole is shortened, the distance between the pole and the surface of the aluminum sheet exceeds the diameter of the aluminum sheet reaches 2.5-3mm, the design capacity of the battery can be improved to the maximum extent under the condition that the total height of the battery is determined, the circumference of the anode pole and the cathode pole is processed by knurling, the structure is simpler, the cost is lower, polyphenylene sulfide used for injection molding on the anode and the cathode has good heat resistance and flame retardance, heat is generated in the power transmission process, and fire caused by overheating of the battery is effectively avoided; the invention has the advantages of simple structure, safety, reliability, high space utilization rate, low cost and improved battery capacity.
Drawings
Fig. 1 is a schematic structural diagram of optimized novel lithium battery cover plate assemblies according to the invention.
Fig. 2 is a schematic diagram of pole knurling of optimized novel lithium battery cover plate assemblies according to the invention.
In the figure: 1. the positive pole 2, the positive pole upper injection molding 3, the sealing ring 4, the explosion-proof valve 5, the liquid injection hole 6, the negative pole 7, the negative pole upper injection molding 8, the smooth aluminum sheet 9, the lower injection molding 10 and the roll flower.
Detailed Description
The invention is further described in conjunction with the drawing.
Example 1
As shown in fig. 1-2, kinds of novel lithium battery cover plate subassemblies that optimize, it includes smooth aluminum sheet 8, smooth aluminum sheet 8's center be provided with explosion-proof valve 4, smooth aluminum sheet 8's both ends downside be connected with down mould plastics 9, the right side that is located the lower mould plastics 9 of smooth aluminum sheet 8 left part downside be provided with anodal utmost point post 7, explosion-proof valve 4's right side be provided with annotate liquid hole 5, the left side that is located the lower mould plastics 9 of smooth aluminum sheet 8 right part downside be provided with negative pole post 6, the upper portion outside of anodal utmost point post 1 be provided with the anodal 2 of moulding plastics on, the outside upside of negative pole post 6 be provided with the negative pole and mould plastics 7 on, anodal utmost point post 1 and negative pole post 6 and smooth aluminum sheet 8 between be provided with sealing.
The invention adopts the smooth aluminum sheet 8, in use, the smooth aluminum sheet 8 is fixed on the surface of the lithium battery, the explosion-proof valve 4 is arranged on the surface to prevent the electro-hydraulic reaction in the battery from generating a large amount of gas, the explosion-proof valve 4 can discharge the gas generated by the electro-hydraulic reaction in time to prevent the battery from expanding excessively and exploding to generate danger, wherein, the positive pole post 1 and the negative pole post 6 are respectively sleeved with the sealing ring 3 and fixed on the smooth aluminum sheet 8, the compression amount of the sealing ring 3 reaches 30-40 percent to carry out injection molding and fixing on the pole post, the cylindrical surface of the pole post can have good anti-friction force after being processed by the roller flower 10, the injection molding of the pole post is firmly fixed, the injection molding is carried out in a compressed state, the pole post and the smooth aluminum sheet 8 are completely sealed, the battery is isolated from the outside to ensure the tightness of the, compared with the prior lithium battery cover plate, the novel cover plate used by the invention can improve the design capacity of the battery in a maximum loudness manner under the condition that the total height of the battery is determined.
Example 2
As shown in fig. 1-2, kinds of novel lithium battery cover plate subassemblies that optimize, it includes smooth aluminum sheet 8, smooth aluminum sheet 8's center be provided with explosion-proof valve 4, smooth aluminum sheet 8's both ends downside be connected with down mould plastics 9, the right side that is located the lower mould plastics 9 of smooth aluminum sheet 8 left part downside be provided with anodal utmost point post 7, explosion-proof valve 4's right side be provided with annotate liquid hole 5, the left side that is located the lower mould plastics 9 of smooth aluminum sheet 8 right part downside be provided with negative pole post 6, the upper portion outside of anodal utmost point post 1 be provided with the anodal 2 of moulding plastics on, the outside upside of negative pole post 6 be provided with the negative pole and mould plastics 7 on, anodal utmost point post 1 and negative pole post 6 and smooth aluminum sheet 8 between be provided with sealing.
The battery is characterized in that the injection molding 2 on the positive electrode is PPS2, the PPS2 is polyphenylene sulfide added with black conductive substances, the injection molding PPS of a conductive material is needed for the positive electrode pole 1, the conductive efficiency of the battery is enhanced, the injection molding 7 on the negative electrode is PPS4, the PPS4 is earthy yellow insulating non-conductive polyphenylene sulfide, the upper side of the negative electrode pole 6 is injection molded with non-conductive polyphenylene sulfide engineering plastics, and the battery has excellent heat resistance and flame resistance, so that the PPS engineering plastics can be used as the battery electrode injection molding material.
The anode pole 1 is made of AL1060-H14, the cathode pole 6 is made of AL1060-H14+ CuT2, the anode pole 1 and the cathode pole 6 are made of pure aluminum respectively and have excellent conductivity and heat resistance, the upper half parts of the anode pole 1 and the cathode pole 6 are subjected to roller knurling 10 treatment, the depth of the roller knurling 10 is 1-2mm, and the height of the roller knurling 10 is 2-2.5 mm.
The lower injection molding 9 is ultrasonically and thermally melted on the aluminum flake 8, the lower injection molding 9 is made of PP, and the lower injection molding is made of polypropylene which has the characteristics of light specific gravity and chemical corrosion resistance.
The height of the positive pole column 1 and the negative pole column 6 exceeding the smooth aluminum sheet 8 is 2.5-3mm, and under the condition that the total height of the battery is determined, the exceeding distance is shortened as much as possible after the pole columns are installed on the smooth aluminum sheet 8, so that more spaces can be provided for the capacity of the battery, the capacity of the battery is improved, and the exceeding distance meets the requirement of subsequent smooth welding of conducting strips on the pole columns.
The compression amount of the sealing ring 3 is 30% -40%, the sealing ring 3 is made of polyurethane, the sealing ring 3 on the pole sleeve reaches -determined compression amount, the sealing ring 3 can play a better sealing role, isolation is made between the inside of the battery and the outside, and internal leakage is prevented.
The torque of the positive pole post 1 and the negative pole post 6 processed by the roller flower 10 is more than or equal to 6 N.M, and the Z-direction thrust of the positive pole post 1 and the negative pole post 6 is more than or equal to 3500N.
The explosion-proof valve 4 is fixed on the polished aluminum sheet 8 by laser welding, the explosion-proof valve 4 is used as a safety control device on the battery, the effect of preventing explosion caused by excessive gas in the battery is achieved, and the explosion-proof valve 4 can be firmly fixed by the laser welding.
The invention adopts the smooth aluminum sheet 8, in use, the smooth aluminum sheet 8 is fixed on the surface of the lithium battery, the explosion-proof valve 4 is arranged on the surface to prevent the electro-hydraulic reaction in the battery from generating a large amount of gas, the explosion-proof valve 4 can discharge the gas generated by the electro-hydraulic reaction in time to prevent the battery from expanding excessively and exploding to generate danger, wherein, the positive pole post 1 and the negative pole post 6 are respectively sleeved with the sealing ring 3 and fixed on the smooth aluminum sheet 8, the compression amount of the sealing ring 3 reaches 30-40 percent to carry out injection molding and fixing on the pole post, the cylindrical surface of the pole post can have good anti-friction force after being processed by the roller flower 10, the injection molding of the pole post is firmly fixed, the injection molding is carried out in a compressed state, the pole post and the smooth aluminum sheet 8 are completely sealed, the battery is isolated from the outside to ensure the tightness of the, the novel cover plate used by the invention can furthest improve the design capacity of the battery under the condition that the total height of the battery is determined, and has the advantages of simple structure, safety, reliability, high space utilization rate, low cost and capacity of improving the battery.

Claims (9)

  1. The novel optimized lithium battery cover plate component comprises a smooth aluminum sheet and is characterized in that an explosion-proof valve is arranged at the center of the smooth aluminum sheet, injection molding is connected to the lower sides of the two ends of the smooth aluminum sheet, an anode pole column is arranged on the right side of the lower injection molding of the lower side of the left portion of the smooth aluminum sheet, a liquid injection hole is formed in the right side of the explosion-proof valve, a cathode pole column is arranged on the left side of the lower injection molding of the lower side of the right portion of the smooth aluminum sheet, PPS (polyphenylene sulfide) which is injected on the anode is arranged on the outer side of the upper portion of the anode pole column, injection molding is carried out on the cathode pole column, and sealing rings are arranged between the anode pole column and the cathode pole.
  2. 2. The optimized novel lithium battery cover plate component according to claim 1, wherein the positive electrode is injection-molded with PPS2, and the negative electrode is injection-molded with PPS 4.
  3. 3. The optimized novel lithium battery cover plate component according to claim 1, wherein the material of the positive electrode post is AL1060-H14, and the material of the negative electrode post is AL1060-H14+ CuT 2.
  4. 4. The optimized novel lithium battery cover plate component according to claim 1, wherein the upper half parts of the anode pole and the cathode pole are subjected to roller embossing, the roller embossing depth is 1-2mm, and the roller embossing height is 2-2.5 mm.
  5. 5. The optimized novel lithium battery cover plate component according to claim 1, wherein the lower injection molding is ultrasonically and thermally fused on a smooth aluminum sheet, and the lower injection molding is made of PP.
  6. 6. The optimized novel lithium battery cover plate component according to claim 1, wherein the height of the positive electrode pole and the negative electrode pole exceeding the aluminum sheet is 2.5-3 mm.
  7. 7. The optimized novel lithium battery cover plate component according to claim 1, wherein the compression amount of the sealing ring is 30% -40%, and the sealing ring is made of polyurethane.
  8. 8. The optimized novel lithium battery cover plate component according to claim 1 or 4, wherein the torque of the positive electrode pole and the negative electrode pole subjected to the roll flower treatment is more than or equal to 6 N.M, and the Z-direction thrust of the positive electrode pole and the negative electrode pole is more than or equal to 3500N.
  9. 9. The optimized novel lithium battery cover plate component according to claim 1, wherein the explosion-proof valve is fixed on the smooth aluminum sheet by laser welding.
CN201911082476.3A 2019-11-07 2019-11-07 optimized novel lithium battery cover plate assembly Pending CN110739416A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201911082476.3A CN110739416A (en) 2019-11-07 2019-11-07 optimized novel lithium battery cover plate assembly

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201911082476.3A CN110739416A (en) 2019-11-07 2019-11-07 optimized novel lithium battery cover plate assembly

Publications (1)

Publication Number Publication Date
CN110739416A true CN110739416A (en) 2020-01-31

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Country Status (1)

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101110472A (en) * 2007-04-05 2008-01-23 蔡松珊 Lithium ion battery cover plate and lithium ion battery or battery set using the cover plate
CN101662004A (en) * 2008-08-26 2010-03-03 比亚迪股份有限公司 Battery cover board assembly, battery and battery pack, and manufacture method thereof
CN201556648U (en) * 2009-06-03 2010-08-18 包雄伟 Top cap of rechargeable battery and packaging shell thereof
CN205881976U (en) * 2016-07-01 2017-01-11 江苏福瑞士电池科技有限公司 Power lithium - ion battery cover plate with multiple connected mode
CN107394066A (en) * 2017-06-26 2017-11-24 湖南三迅新能源科技有限公司 Battery cover board and its processing method
CN208806299U (en) * 2018-07-12 2019-04-30 深圳市瑞德丰精密制造有限公司 A kind of conductive pole column does not fall off structure and battery cover board

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101110472A (en) * 2007-04-05 2008-01-23 蔡松珊 Lithium ion battery cover plate and lithium ion battery or battery set using the cover plate
CN101662004A (en) * 2008-08-26 2010-03-03 比亚迪股份有限公司 Battery cover board assembly, battery and battery pack, and manufacture method thereof
CN201556648U (en) * 2009-06-03 2010-08-18 包雄伟 Top cap of rechargeable battery and packaging shell thereof
CN205881976U (en) * 2016-07-01 2017-01-11 江苏福瑞士电池科技有限公司 Power lithium - ion battery cover plate with multiple connected mode
CN107394066A (en) * 2017-06-26 2017-11-24 湖南三迅新能源科技有限公司 Battery cover board and its processing method
CN208806299U (en) * 2018-07-12 2019-04-30 深圳市瑞德丰精密制造有限公司 A kind of conductive pole column does not fall off structure and battery cover board

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Application publication date: 20200131