CN103915585A - Lithium ion battery end cover - Google Patents

Lithium ion battery end cover Download PDF

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Publication number
CN103915585A
CN103915585A CN201410127982.0A CN201410127982A CN103915585A CN 103915585 A CN103915585 A CN 103915585A CN 201410127982 A CN201410127982 A CN 201410127982A CN 103915585 A CN103915585 A CN 103915585A
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CN
China
Prior art keywords
guide pin
lid
lithium ion
ion battery
battery end
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.)
Granted
Application number
CN201410127982.0A
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Chinese (zh)
Other versions
CN103915585B (en
Inventor
谭轶鸿
张志杰
晏东兴
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.)
Hefei Hongye lithium energy technology Co., Ltd
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谭轶鸿
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Priority to CN201410127982.0A priority Critical patent/CN103915585B/en
Publication of CN103915585A publication Critical patent/CN103915585A/en
Application granted granted Critical
Publication of CN103915585B publication Critical patent/CN103915585B/en
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Classifications

    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/147Lids or covers
    • H01M50/148Lids or covers characterised by their shape
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/10Primary casings; Jackets or wrappings
    • H01M50/183Sealing members
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M50/00Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
    • H01M50/50Current conducting connections for cells or batteries
    • H01M50/543Terminals
    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10Energy storage using batteries

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  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Sealing Battery Cases Or Jackets (AREA)

Abstract

The invention discloses a lithium ion battery end cover. The lithium ion battery end cover is characterized by comprising a cover body, a positive guide pin and a negative guide pin, wherein the positive guide pin and the negative guide pin run through the cover body, one section, in the cover body, of each guide pin is provided with a guide pin holder which is used for preventing the guide pin from being separated from the cover body, and the cover body is formed by thermoplastic resin, which can resist the high temperature of 90,DEG C, in an injection molding manner. The lithium ion battery end cover is simple in structure, the guide pins are integrally injected into the cover body, and the end cover is integrally formed in a seamless manner, so that the liquid leakage of a battery can be effectively prevented; the guide pins cannot be separated from the cover body through the guide pin holders which are integrated with the guide pins, and the bottom area of the guide pin holders is large, so that the welding area is increased, the guide pins are unlikely to drop, the contact area is also increased, the impedance is reduced, and the heating during large-current discharging can be avoided.

Description

Lithium ion battery end cap
Technical field
The present invention relates to a kind of battery, specifically relate to a kind of lithium ion battery, particularly relate to a kind of lithium ion battery end cap.
Background technology
Lithium ion battery is a kind of rechargeable battery, and it mainly relies on lithium ion between positive pole and negative pole, to move work.Lithium ion battery refers to take lithium ion and embeds the general name of compound as positive electrode battery.The material that general employing contains elemental lithium, as the battery of electrode, is the representative of modern high performance battery.Lithium ion battery is take carbon materials as negative pole, does anodally with the compound containing lithium, there is no lithium metal, only has lithium ion, Here it is lithium ion battery.
Lithium ion battery is made up of positive pole, negative pole and three parts of electrolyte.Electrolyte is electrolyte solution, and the solute of electrolyte solution often adopts lithium salts, as lithium perchlorate (LiClO 4), lithium hexafluoro phosphate (LiPF 6), LiBF4 (LiBF 4); Because the operating voltage of battery is far above the decomposition voltage of water, therefore lithium ion battery often adopts organic solvent, as ether, vinyl carbonate, propylene carbonate, diethyl carbonate etc.Organic solvent usually destroys the structure of graphite in the time of charging, causes it to strip off, and causes electrode passivation at its surface formation solid electrolyte film (solid electrolyte interphase, SEI).Organic solvent also brings the safety issues such as inflammable, explosive.
The production of lithium ion battery, in assembly process, through reeling technical processs such as injecting electrolyte, sealing, positive and negative tab welding, completes the assembling process of battery by positive plate, barrier film, negative plate, the top-down order of barrier film, makes finished product battery.
At present, the most of box hat that adopts of column lithium ion battery, both positive and negative polarity is at the two ends of battery.This structure, in the time of various battery combination application, need to connect with nickel strap, and the connection in series-parallel that realizes battery is used.This battery structure production cost is high, and the connection in series-parallel of battery pack is used inconvenient, and is unfavorable for safeguarding and maintenance.
Subsequently, for simplifying production technology, be convenient to realize automated production, occurred adopting guide pin formula positive and negative electrodes in same to the lithium ion battery of drawing (if application number is 201010197892.0, the applying date is 2010.06.11, application publication number is CN101847756A, and Shen Qing Publication day is 2010.09.29, and denomination of invention is the patent of invention of " a kind of cylindrical aluminum hull sealing with a tight waist positive and negative electrodes in same is to the lithium ion battery of drawing ").It adopts guide pin to be riveted in battery, directly draws through the pin hole of plug.Though it is very convenient to carry out connection in series-parallel connection while use, the contact-making surface (guide pin aluminium stalk place) between plug and guide pin is easily because sealing the bad battery leakage that causes.And because guide pin connecting portion (backshank of guide pin flattens) is narrow, can only be connected with battery by riveting method, contact area is little, thereby cause battery easily to generate heat in the time of heavy-current discharge, the maximum temperature of battery-heating can reach 90 ℃, also can cause plug distortion and occurs that crack causes battery leakage etc. fatal bad.
Summary of the invention
The object of this invention is to provide a kind of lithium ion battery end cap of avoiding electrolyte solution to leak.
The present invention adopts following technical scheme to realize its goal of the invention, a kind of lithium ion battery end cap, comprise lid, be arranged in the positive and negative electrode guide pin of lid, described guide pin is positioned at a section of lid and is provided with and prevents that guide pin from deviating from the guide pin seat of lid, described lid is injection molded by resistance to 90 ℃ of thermoplastic resins, and guide pin is positioned at one section of lid and is entered lid with guide pin seat by integral molded plastic.
Lid of the present invention can adopt Merlon (PC) or AS styrene-acrylonitrile copolymer or polyethylene (PE) injection molded.
A kind of lithium ion battery end cap, it comprises that lid, afterbody are positioned at the positive and negative electrode guide pin of lid, the afterbody of guide pin is respectively provided with and prevents that guide pin from deviating from the guide pin seat of lid, the guide pin seat of positive and negative electrode guide pin afterbody is entered in lid by integral molded plastic, and guide pin seat adopts conductive material, the bottom of guide pin seat is concordant with lid bottom, so that connect battery pole piece.
For fixation guide pin and seamless, guide pin seat of the present invention is cone shape or the pyramid bodily form.
The present invention deviates from order to prevent guide pin, and described guide pin seat comprises anticreep conehead, is located at the connection base of anticreep conehead below, and the bottom that connects base is concordant with lid bottom; The base area of described anticreep conehead is greater than the cross-sectional area that connects base.
The present invention is in order to prevent guide pin and to deviate from and seamless, and described anticreep conehead is cone shape or the pyramid bodily form, and connecting base is cylindrical or the prism bodily form.
The present invention is in order to increase compactness, and described lid is circular bosses shape, on its annular table terrace or the outer periphery of lid be provided with inner side and the sealing ring of lid form fit.
Owing to adopting technique scheme, the present invention has realized goal of the invention preferably, and it is simple in structure, and guide pin integral molded plastic is entered to lid, and end cap integral seamless gap, effectively prevents battery leakage; Make guide pin cannot deviate from lid with the guide pin seat of guide pin one, and the bottom area of guide pin seat is large, has increased bonding area, difficult drop-off, has also increased contact area, has reduced impedance, while avoiding heavy-current discharge, generates heat.
Accompanying drawing explanation
Fig. 1 is the structural representation of the embodiment of the present invention 1;
Fig. 2 is the structure enlarged diagram of guide pin seat in the embodiment of the present invention 1;
Fig. 3 is the structure enlarged diagram of guide pin seat in the embodiment of the present invention 2;
Fig. 4 is the structural representation of the embodiment of the present invention 3;
Fig. 5 is the structure enlarged diagram of guide pin seat in the embodiment of the present invention 3;
Fig. 6 is the structure enlarged diagram of guide pin seat in the embodiment of the present invention 4;
Fig. 7 is the structural representation of the embodiment of the present invention 5.
Embodiment
Below in conjunction with drawings and Examples, the invention will be further described.
Embodiment 1:
As seen from Figure 1, Figure 2, a kind of lithium ion battery end cap, comprise lid 1, be arranged in the positive and negative electrode guide pin 2 of lid 1, described guide pin 2 is positioned at a section of lid 1 and is provided with and prevents that guide pin 2 from deviating from the guide pin seat 3 of lid 1, described lid 1 is injection molded by resistance to 90 ℃ of thermoplastic resins, and guide pin 2 is positioned at one section of lid 1 and is entered lid 1 with guide pin seat 3 by integral molded plastic.
Lid 1 of the present invention can adopt Merlon (PC) or AS styrene-acrylonitrile copolymer or polyethylene (PE) injection molded (the present embodiment adopt for styrene-acrylonitrile copolymer).
Guide pin 2 of the present invention, guide pin seat 3 all adopt conducting metal, the anodal aluminium that adopts, and negative pole is aluminium or nickel or copper (in the present embodiment, anodal employing is aluminium, and negative pole is aluminium).
For fixation guide pin 2 and seamless, guide pin seat 3 of the present invention is cone shape or the pyramid bodily form (the present embodiment is cone shape).
The present invention is in order to increase compactness, and described lid 1 is circular bosses shape, on its annular table terrace or the outer periphery of lid 1 be provided with inner side and be located on annular table terrace with the sealing ring 4 of sealing ring 4(the present embodiment of lid 1 form fit).
Embodiment 2:
From Fig. 1, Fig. 3, the guide pin seat 3 in the present embodiment is the pyramid bodily form.
Remaining with embodiment 1.
Embodiment 3:
From Fig. 4, Fig. 5, a kind of lithium ion battery end cap, it comprises that lid 1, afterbody are positioned at the positive and negative electrode guide pin 2 of lid 1, the afterbody of guide pin 2 is respectively provided with and prevents that guide pin 2 from deviating from the guide pin seat 3 of lid 1, the guide pin seat 3 of positive and negative electrode guide pin 2 afterbodys is entered in lid 1 by integral molded plastic, and guide pin seat 3 adopts conductive material, the bottom of guide pin seat 3 is concordant with lid 1 bottom, so that connect battery pole piece.
The present invention deviates from order to prevent guide pin 2, and described guide pin seat 3 comprises anticreep conehead 31, is located at the connection base 32 of anticreep conehead 31 belows, and the bottom that connects base 32 is concordant with lid 1 bottom; The base area of described anticreep conehead 31 is greater than the cross-sectional area that connects base 32.
The present invention is in order to prevent guide pin 2 and to deviate from and seamless, and described anticreep conehead 31 is cone shape or the pyramid bodily form, and connecting base 32 be cylindrical or the prism bodily form (in the present embodiment, anticreep conehead 31 is cone shape, and connection base 32 is cylindrical).
Remaining with embodiment 1.
Embodiment 4:
From Fig. 4, Fig. 6, the anticreep conehead 31 in the present embodiment is the pyramid bodily form, and connecting base 32 is the prism bodily form.
Remaining with embodiment 3.
Embodiment 5:
As shown in Figure 7, sealing ring 4 in the present embodiment is located at the outer periphery of lid 1, and the inner side of sealing ring 4 and lid 1 form fit, and the outside of sealing ring 4 coordinates with battery aluminum shell inner wall shape, thereby increase and the frictional force of battery aluminum shell inwall, further improved compactness.
Remaining with embodiment 3.

Claims (9)

1. a lithium ion battery end cap, is characterized in that the positive and negative electrode guide pin that comprises lid, be arranged in lid, described guide pin are positioned at a section of lid and are provided with and prevent that guide pin from deviating from the guide pin seat of lid, and described lid is injection molded by resistance to 90 ℃ of thermoplastic resins.
2. a lithium ion battery end cap, it is characterized in that it comprises that lid, afterbody are positioned at the positive and negative electrode guide pin of lid, the afterbody of guide pin is respectively provided with and prevents that guide pin from deviating from the guide pin seat of lid, and guide pin seat adopts conductive material, concordant bottom the bottom of guide pin seat and lid.
3. lithium ion battery end cap according to claim 1 and 2, is characterized in that described guide pin seat is cone shape or the pyramid bodily form.
4. lithium ion battery end cap according to claim 1 and 2, the guide pin seat described in it is characterized in that comprises anticreep conehead, is located at the connection base of anticreep conehead below, and the bottom that connects base is concordant with lid bottom; The base area of described anticreep conehead is greater than the cross-sectional area that connects base.
5. lithium ion battery end cap according to claim 4, is characterized in that described anticreep conehead is cone shape or the pyramid bodily form, and connecting base is cylindrical or the prism bodily form.
6. lithium ion battery end cap according to claim 1 and 2, is characterized in that described lid is circular bosses shape, on its annular table terrace or the outer periphery of lid be provided with the sealing ring of inner side and lid form fit.
7. lithium ion battery end cap according to claim 3, is characterized in that described lid is circular bosses shape, on its annular table terrace or the outer periphery of lid be provided with the sealing ring of inner side and lid form fit.
8. lithium ion battery end cap according to claim 4, is characterized in that described lid is circular bosses shape, on its annular table terrace or the outer periphery of lid be provided with the sealing ring of inner side and lid form fit.
9. lithium ion battery end cap according to claim 5, is characterized in that described lid is circular bosses shape, on its annular table terrace or the outer periphery of lid be provided with the sealing ring of inner side and lid form fit.
CN201410127982.0A 2014-04-01 2014-04-01 Lithium ion battery end cover Active CN103915585B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201410127982.0A CN103915585B (en) 2014-04-01 2014-04-01 Lithium ion battery end cover

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Application Number Priority Date Filing Date Title
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CN103915585A true CN103915585A (en) 2014-07-09
CN103915585B CN103915585B (en) 2017-02-15

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106784437A (en) * 2016-12-01 2017-05-31 浙江长兴金太阳电源有限公司 A kind of battery cover structure

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002190295A (en) * 2000-12-21 2002-07-05 Toyota Motor Corp Secondary cell and manufacturing method thereof
US20100129709A1 (en) * 2008-11-27 2010-05-27 Masanori Matsubara Battery
CN201781004U (en) * 2010-09-13 2011-03-30 周均 Lead-out structure of negative electrode guide needle of cylindrical lithium battery
CN202474046U (en) * 2011-12-16 2012-10-03 周均 Lithium-ion power battery for leading out cylindrical guide pins in same direction and sealed in girdling way
CN103633259A (en) * 2012-08-20 2014-03-12 宁波康顺电子科技有限公司 PP plastic housing lithium ion battery
CN203503714U (en) * 2013-09-26 2014-03-26 中航锂电(洛阳)有限公司 Battery cover plate assembly and lithium ion power battery using same

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002190295A (en) * 2000-12-21 2002-07-05 Toyota Motor Corp Secondary cell and manufacturing method thereof
US20100129709A1 (en) * 2008-11-27 2010-05-27 Masanori Matsubara Battery
CN201781004U (en) * 2010-09-13 2011-03-30 周均 Lead-out structure of negative electrode guide needle of cylindrical lithium battery
CN202474046U (en) * 2011-12-16 2012-10-03 周均 Lithium-ion power battery for leading out cylindrical guide pins in same direction and sealed in girdling way
CN103633259A (en) * 2012-08-20 2014-03-12 宁波康顺电子科技有限公司 PP plastic housing lithium ion battery
CN203503714U (en) * 2013-09-26 2014-03-26 中航锂电(洛阳)有限公司 Battery cover plate assembly and lithium ion power battery using same

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106784437A (en) * 2016-12-01 2017-05-31 浙江长兴金太阳电源有限公司 A kind of battery cover structure

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Owner name: WUHAN LITHIUM ENERGY TECHNOLOGY CO., LTD.

Free format text: FORMER OWNER: TAN YIHONG

Effective date: 20150422

C41 Transfer of patent application or patent right or utility model
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Free format text: CORRECT: ADDRESS; FROM: 410015 CHANGSHA, HUNAN PROVINCE TO: 430000 WUHAN, HUBEI PROVINCE

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Effective date of registration: 20150422

Address after: 430000 Hubei New District of Wuhan City Bridge Economic Development Zone Jiangxia criminal HUANGJIAHU Road West Long Village (Wuhan Hongfeng Glass Co., Ltd.)

Applicant after: WUHAN LITHIUM ENERGY TECHNOLOGY CO., LTD.

Address before: 410015, Hunan, Changsha Furong Road, paragraph 495, No. three City Express building, N building, 14 floor

Applicant before: Tan Diehong

C14 Grant of patent or utility model
GR01 Patent grant
CB03 Change of inventor or designer information

Inventor after: Liao Funing

Inventor after: Luo Yuanfu

Inventor before: Tan Diehong

Inventor before: Zhang Zhijie

Inventor before: Yan Dongxing

CB03 Change of inventor or designer information
CP03 Change of name, title or address

Address after: 230088 Anhui city of Hefei province high tech Zone Technology Park, chrysanthemum Bai Yan Road No. 33

Patentee after: Anhui Li Neng Technology Co., Ltd.

Address before: 430000 Hubei New District of Wuhan City Bridge Economic Development Zone Jiangxia criminal HUANGJIAHU Road West Long Village (Wuhan Hongfeng Glass Co., Ltd.)

Patentee before: WUHAN LITHIUM ENERGY TECHNOLOGY CO., LTD.

CP03 Change of name, title or address
TR01 Transfer of patent right
TR01 Transfer of patent right

Effective date of registration: 20200527

Address after: Building 1, No. 33, Qiuju Road, hi tech Zone, Hefei City, Anhui Province 230000

Patentee after: Hefei Hongye lithium energy technology Co., Ltd

Address before: 230088 Anhui city of Hefei province high tech Zone Technology Park, chrysanthemum Bai Yan Road No. 33

Patentee before: ANHUI LITHIUM ENERGY TECHNOLOGY Co.,Ltd.