CN203179967U - Lithium battery structure - Google Patents

Lithium battery structure Download PDF

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Publication number
CN203179967U
CN203179967U CN2013201760794U CN201320176079U CN203179967U CN 203179967 U CN203179967 U CN 203179967U CN 2013201760794 U CN2013201760794 U CN 2013201760794U CN 201320176079 U CN201320176079 U CN 201320176079U CN 203179967 U CN203179967 U CN 203179967U
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CN
China
Prior art keywords
negative pole
joint portion
anodal
positive
cover plate
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.)
Expired - Fee Related
Application number
CN2013201760794U
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Chinese (zh)
Inventor
黄文弘
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.)
Dongguan Qiao Steps On Energy-Conservation Science And Technology Ltd
Original Assignee
Dongguan Qiao Steps On Energy-Conservation Science And Technology 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 Dongguan Qiao Steps On Energy-Conservation Science And Technology Ltd filed Critical Dongguan Qiao Steps On Energy-Conservation Science And Technology Ltd
Priority to CN2013201760794U priority Critical patent/CN203179967U/en
Priority to PCT/CN2013/075664 priority patent/WO2014166142A1/en
Application granted granted Critical
Publication of CN203179967U publication Critical patent/CN203179967U/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/052Li-accumulators
    • 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
    • H01M50/531Electrode connections inside a battery casing
    • H01M50/538Connection of several leads or tabs of wound or folded electrode stacks
    • HELECTRICITY
    • H01ELECTRIC ELEMENTS
    • H01MPROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00Secondary cells; Manufacture thereof
    • H01M10/05Accumulators with non-aqueous electrolyte
    • H01M10/058Construction or manufacture
    • H01M10/0587Construction or manufacture of accumulators having only wound construction elements, i.e. wound positive electrodes, wound negative electrodes and wound separators
    • 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
    • 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
    • H01M50/547Terminals characterised by the disposition of the terminals on the cells
    • H01M50/55Terminals characterised by the disposition of the terminals on the cells on the same side of the cell
    • 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
    • H01M50/564Terminals characterised by their manufacturing process
    • H01M50/567Terminals characterised by their manufacturing process by fixing means, e.g. screws, rivets or bolts
    • 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)
  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Connection Of Batteries Or Terminals (AREA)
  • Secondary Cells (AREA)

Abstract

The utility model relates to a lithium battery structure which comprises a shell; a cover plate of the shell is provided with a positive pole wiring component and a negative pole wiring component; a positive pole connecting piece and a negative pole connecting piece are arranged below the cover plate; the positive pole connecting piece is electrically connected with the positive pole wiring component; the negative pole connecting piece is electrically connected with the negative pole wiring component; a first positive pole combining part and a second positive pole combining part extend downward from the bottom end of the positive pole connecting piece; a first negative pole combining part and a second negative pole combining part extend downward from the bottom end of the negative pole connecting piece; a roll coil is arranged in the shell; a plurality of positive pole lugs arranged on the top of the roll coil are clamped and combined between the first positive pole combining part and the second positive pole combining part; a plurality of negative pole lugs are clamped and combined between the first negative pole combining part and the second negative pole combining part. Therefore, the plurality of positive pole lugs and the plurality of negative pole lugs can be stably located.

Description

Lithium battery structure
Technical field
The utility model is relevant for a kind of lithium battery structure, refers to especially a kind ofly can effectively improve usefulness, and guarantees to use safety.
Background technology
Present employed lithium battery, mainly comprise a housing, built-in electrolyte solution and the lithium battery coiling core of being placed with of housing, lithium battery coiling core is by positive plate, barrier film and negative plate continuous reeling form, the top of positive plate directly forms or welds several positive pole ears, several positive pole ears directly are welded on the bottom of positive terminal, the top of negative plate directly forms or welds several negative lug, several negative lug directly are welded on the bottom of the negative terminal of housing, and after the external screw thread by positive terminal and negative terminal top screws togather a nut respectively, can fix different binding posts respectively, with output just, negative electricity.
Summary of the invention
But the positive pole ear of above-mentioned volume core and negative lug are welded in the bottom of positive and negative electrode binding post respectively, because the quality of pad is wayward, and often are point-like and one-sided contact, therefore, cause conduction and the bad problem of dispelling the heat easily.Moreover, when lithium battery is inverted, because the positive plate of volume core or negative plate have the problem that moves down and allow positive pole, negative lug be out of shape, thus, will have the potential hazard that causes short circuit.
In view of this, for a kind of lithium battery structure that is different from existing lithium battery is provided, improving above-mentioned shortcoming, and reach following purpose, the inventor long-pending for many years experience and constantly research and development improve, generation of the present utility model is arranged then.
A purpose of the present utility model is to provide a kind of lithium battery structure, by below cover plate, being provided with positive strap and the negative pole brace that is ㄇ shape respectively, to insert and put the structure of several positive pole ears and several negative lug respectively, in order to can distinguish and firmly connect several positive pole ears and several negative lug, so that it is little to conduct electricity good, rapid heat dissipation, internal resistance, and make ease of assembly.
Another purpose of the present utility model is to provide a kind of lithium battery structure, by between insulating trip and volume core, being provided with keeper, and with the two ends of keeper compress respectively insulating trip the bottom and with the structure on the top of volume core, in order to can effectively locate the volume core, avoid causing short circuit, to guarantee to use safety.
For reaching the foregoing invention purpose, the set lithium battery structure of the utility model comprises a housing, an anodal connector assembly, a negative pole connector assembly, a positive strap, a negative pole brace and a volume core.Wherein, this housing comprises that the lower house and that a top has an opening is covered on the lower house top with the cover plate of sealing opening, and this positive pole connector assembly and negative pole connector assembly are located on the cover plate; This positive strap is incorporated into the cover plate below, and the top of positive strap and anodal connector assembly are electric connection, and the bottom of positive strap is extended the first anodal joint portion and the second anodal joint portion downwards; This negative pole brace is incorporated into the cover plate below, and the top of negative pole brace and negative pole connector assembly are electric connection, and the bottom of negative pole brace is extended the first negative pole joint portion and the second negative pole joint portion downwards; And this volume core is placed in the lower house, the top of volume core is provided with several positive pole ears and several negative lug, these positive pole ears insert and put and are incorporated between first, second anodal joint portion, and these negative lug insert and put and are incorporated between first, second negative pole joint portion.
During enforcement, cover plate comprises top board and insulating trip, and top board and insulating trip are upper and lower superimposed, and insulating trip is folded between top board and the positive and negative electrode brace; And positioning piece feeds to down and compresses and locate the volume core between insulating trip and volume core.
During enforcement, this keeper takes the shape of the letter U.
During enforcement, the utility model more comprises one the 3rd anodal joint portion, one the 4th anodal joint portion, one the 3rd negative pole joint portion and one the 4th negative pole joint portion, wherein, three, the 4th anodal joint portion is extended downwards by the bottom of positive strap respectively, and the 3rd, the 4th anodal binding site is between first, second anodal joint portion; And the 3rd, the 4th negative pole joint portion is extended downwards by the bottom of negative pole brace respectively, and the 3rd, the 4th negative pole binding site is between first, second negative pole joint portion.
During enforcement, the central part of cover plate forms an explosionproof hole.
During enforcement, be positioned on the cover plate of explosionproof hole both sides and be respectively equipped with gum cover, the hollow tube of each gum cover bottom surface protrudes downwards, and pass top board and insulating trip respectively, this positive pole, negative pole connector assembly are placed in the top of two gum covers respectively, this positive strap top and cover plate and anodal connector assembly are connected and fixed, and the top of this negative pole brace, cover plate and negative pole connector assembly are connected and fixed.
Useful technique effect of the present utility model is:
1, the utility model is that several positive pole ears and several negative lug are folded in respectively among the positive pole, negative pole brace of ㄇ shape, therefore, can distinguish and firmly connect several positive pole ears and several negative lug, so that it is little to conduct electricity good, rapid heat dissipation, internal resistance, but and ease of assembly.
2, the utility model can be upright at housing, be inverted or when tilting to place, with keeper location volume core, therefore, can effectively avoid causing short circuit, to guarantee to use safety.
For ease of to the utility model more deep understanding being arranged, after being specified in now.
Description of drawings
Fig. 1 is the assembly exploded view of the utility model preferred embodiment.
Fig. 2 A-Fig. 2 B is the stereo appearance figure after the part combination of components of the utility model preferred embodiment.
Fig. 3 is the stereo appearance figure after the part combination of components of the utility model preferred embodiment.
Fig. 4 finishes the preceding stereo appearance figure of assembling for all component of the utility model preferred embodiment.
[symbol description]
Lithium battery structure 1 housing 2 openings 21 lower houses 22
Cover plate 23 top boards 24 insulating trips 25 explosionproof holes 26
4 positive straps 5 of gum cover 27 anodal connector assembly 3 negative pole connector assemblies
The 3rd anodal joint portion 53,51 second anodal joint portions 52, the first anodal joint portion
54 negative pole braces, 6 first negative pole joint portions 61, the 4th anodal joint portion
The 4th negative pole joint portion 64, the 3rd negative pole joint portion 63, the second negative pole joint portion 62
Volume core 7 positive pole ears 71 negative lug 72
Keeper 8 base plates 81 legs 82.
Embodiment
See also shown in Fig. 1 ~ 3, it is the preferred embodiment of the utility model lithium battery structure 1, comprises a housing 2, an anodal connector assembly 3, a negative pole connector assembly 4, a positive strap 5, a negative pole brace 6, volume core 7 and a positioning piece 8.
This housing 2 is the rectangular body of hollow, comprises that the lower house 22 and that a top has an opening 21 covers the cover plate 23 to seal this opening 21 on lower house 22 tops.This cover plate 23 comprises a top board 24 and an insulating trip 25, and top board 24 and insulating trip 25 are upper and lower superimposed, and the central part of cover plate 23 forms an explosionproof hole 26.Be positioned on the cover plate 23 of explosionproof hole 26 both sides and be respectively equipped with gum cover 27, the hollow tube of arbitrary gum cover 27 bottom surfaces protrudes downwards, and passes top board 24 and insulating trip 25 respectively.
This positive pole, negative pole connector assembly (3,4) are placed in the top of two gum covers 27 respectively, be connected and fixed by top, cover plate 23 and the anodal connector assembly 3 of riveted joint mode with positive strap 5, top, cover plate 23 and the negative pole connector assembly 4 of negative pole brace 6 are connected and fixed, insulating trip 25 is folded between top board 24 and the positive and negative electrode brace (5,6).
This positive strap 5 is made up of the different U-shaped lamellar body of two block sizes, wherein the bottom of big lamellar body extends to form one first anodal joint portion 51 and one second anodal joint portion 52 respectively downwards, extend to form one the 3rd anodal joint portion 53 and one the 4th anodal joint portion 54 respectively downwards than the bottom of platelets, when two U-shaped lamellar bodies stacked, and when being riveted on the cover plate 23 simultaneously, can allow the 3rd, the 4th anodal joint portion (53,54) be positioned at first, the second anodal joint portion (51,52) between, and first, the 3rd anodal joint portion (51,53) form a gap between, second, the 4th anodal joint portion (52,54) form another gap between.
This negative pole brace 6 is made up of the different U-shaped lamellar body of two block sizes equally, the bottom of big lamellar body extends to form one first negative pole joint portion 61 and one second negative pole joint portion 62 respectively downwards, extend to form one the 3rd negative pole joint portion 63 and one the 4th negative pole joint portion 64 respectively downwards than the bottom of platelets, when two U-shaped lamellar bodies stacked, and when being riveted on the cover plate 23 simultaneously, the 3rd, the 4th negative pole joint portion (63,64) be positioned at first, the second negative pole joint portion (61,62) between, first, the 3rd negative pole joint portion (61,63) form a gap between, and second, the 4th negative pole joint portion (62,64) form another gap between.
During enforcement, first, second, the 3rd, the 4th anodal joint portion (51,52,53,54) also can be directly extended in parallel downwards by the bottom of positive strap 5 and form, first, second, the 3rd, the 4th negative pole joint portion (61,62,63,64) also can be directly extended in parallel downwards by the bottom of negative pole brace 6 and form, equally can be first, the 3rd anodal joint portion (51,53) between, second, the 4th anodal joint portion (52,54) between, first, the 3rd negative pole joint portion (61,63) reach second between, the 4th negative pole joint portion (62,64) form a gap between respectively.
This volume core 7 forms for the stacked continuous reeling afterwards of positive plate, barrier film and negative plate, during enforcement, this volume core 7 also can be positive plate, barrier film and negative plate in regular turn storehouse form, so as to the volume core 7 the top form several positive pole ears 71 and several negative lug 72.Reach between the second, the 4th anodal joint portion (52,54) between the first, the 3rd anodal joint portion (51,53) when several positive pole ears 71 are folded in respectively, several negative lug 72 are folded in respectively when reaching between the second, the 4th negative pole joint portion (62,64) between the first, the 3rd negative pole joint portion (61,63), weld with ultrasonic waves respectively, can allow positive strap 5 firmly be connected with several positive pole ears 71, allow negative pole brace 6 firmly be connected with several negative lug 72.
During enforcement, the structure of above-mentioned positive strap 5 and negative pole brace 6 is applicable to that volume core 7 is provided with the use state of many group positive pole ears 71 and many group negative lug 72, and when volume core 7 only is provided with one group of positive pole ear 71 and one group of negative lug 72, this positive strap 5 also can only be provided with first, second anodal joint portion (51,52), this negative pole brace 6 only is provided with first, second negative pole joint portion (61,62), can allow positive strap 5 firmly be connected with several positive pole ears 71 equally, allow negative pole brace 6 firmly be connected with several negative lug 72.
And shown in Fig. 1,4, this keeper 8 is between insulating trip 25 and volume core 7, keeper 8 summarys take the shape of the letter U, comprise that a base plate 81 reaches by the upwardly extending leg 82 of base plate 81 both sides difference, wherein, base plate 81 presses on the top of volume core 7 downwards, and each leg 82 upwards presses on the bottom of cover plate 23, specifically is to press on insulating trip 25 bottoms.Whereby, when positive strap 5, negative pole brace 6, volume core 7 and keeper 8 are packaged in housing 2 inside, and when housing 2 inversions or inclination are placed, support by keeper 8, can prevent that positive plate or the negative plate of rolling up core 7 from moving, and prevent positive strap 5, positive pole ear 71, negative pole brace 6 and negative lug 72 distortion, thereby avoid causing risk of short-circuits.
Therefore, the utlity model has following advantage:
1, the utility model is that several positive pole ears and several negative lug are folded in respectively among the positive pole, negative pole brace of ㄇ shape, therefore, can distinguish and firmly connect several positive pole ears and several negative lug, so that it is little to conduct electricity good, rapid heat dissipation, internal resistance, but and ease of assembly.
2, the utility model can be upright at housing, be inverted or when tilting to place, with keeper location volume core, therefore, can effectively avoid causing short circuit, to guarantee to use safety.
In sum, according to the content that above discloses, the utility model really can reach its intended purposes, provide a kind of can not only allow Stability Analysis of Structures, prevent that short circuit is to guarantee to use safety, and can effectively promote the lithium battery structure of conduction and radiating effect, have the value of utilizing on the industry, the whence proposes novel patent application in accordance with the law.

Claims (8)

1. lithium battery structure, its feature comprises:
One housing comprises that the lower house and that a top has an opening is covered on the lower house top to seal the cover plate of this opening, and this cover plate is provided with an anodal connector assembly and a negative pole connector assembly;
One positive strap is incorporated into the cover plate below, and the top of this positive strap and anodal connector assembly are electric connection, and the bottom of positive strap is extended one first anodal joint portion and one second anodal joint portion downwards;
One negative pole brace is incorporated into the cover plate below, and the top of this negative pole brace and negative pole connector assembly are electric connection, and the bottom of negative pole brace is extended one first negative pole joint portion and one second negative pole joint portion downwards; And
One volume core, be placed in the lower house, the top of this volume core is provided with several positive pole ears and several negative lug, and these positive pole ears insert and put and are incorporated between first, second anodal joint portion, and these negative lug insert and put and are incorporated between first, second negative pole joint portion.
2. lithium battery structure as claimed in claim 1 is characterized in that, this cover plate comprises a top board and an insulating trip, and this top board and this insulating trip are upper and lower superimposed, and this insulating trip is folded between top board and the positive and negative electrode brace.
3. lithium battery structure as claimed in claim 2 is characterized in that, more comprises positioning piece, and this keeper feeds to down and compresses and locate the volume core between this insulating trip and volume core.
4. as claim 3 a described lithium battery structure, it is characterized in that this keeper takes the shape of the letter U.
5. as claim 1,2,3 or 4 described lithium battery structures, it is characterized in that, more comprise one the 3rd anodal joint portion and one the 4th anodal joint portion, three, the 4th anodal joint portion is extended downwards by the bottom of positive strap respectively, and the 3rd, the 4th anodal binding site is between first, second anodal joint portion.
6. as claim 1,2,3 or 4 described lithium battery structures, it is characterized in that, more comprise one the 3rd negative pole joint portion and one the 4th negative pole joint portion, three, the 4th negative pole joint portion is extended downwards by the bottom of negative pole brace respectively, and the 3rd, the 4th negative pole binding site is between first, second negative pole joint portion.
7. lithium battery structure as claimed in claim 2 is characterized in that, the central part of cover plate forms an explosionproof hole.
8. lithium battery structure as claimed in claim 7, it is characterized in that, be positioned on the cover plate of explosionproof hole both sides and be respectively equipped with gum cover, the hollow tube of each gum cover bottom surface protrudes downwards, and pass top board and insulating trip respectively, this positive pole, negative pole connector assembly are placed in the top of two gum covers respectively, and this positive strap top and cover plate and anodal connector assembly are connected and fixed, and the top of this negative pole brace, cover plate and negative pole connector assembly are connected and fixed.
CN2013201760794U 2013-04-09 2013-04-09 Lithium battery structure Expired - Fee Related CN203179967U (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
CN2013201760794U CN203179967U (en) 2013-04-09 2013-04-09 Lithium battery structure
PCT/CN2013/075664 WO2014166142A1 (en) 2013-04-09 2013-05-15 Lithium battery structure

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2013201760794U CN203179967U (en) 2013-04-09 2013-04-09 Lithium battery structure

Publications (1)

Publication Number Publication Date
CN203179967U true CN203179967U (en) 2013-09-04

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WO (1) WO2014166142A1 (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106450122A (en) * 2016-11-21 2017-02-22 华霆(合肥)动力技术有限公司 Battery connection structure and battery pack
CN111697170A (en) * 2020-06-23 2020-09-22 欣旺达电动汽车电池有限公司 Bi-pass single battery, assembling method thereof and battery pack
CN111697191A (en) * 2020-06-23 2020-09-22 欣旺达电动汽车电池有限公司 Splicing type long power battery, assembling method thereof and battery pack

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CN110061178A (en) 2018-01-18 2019-07-26 比亚迪股份有限公司 Battery, battery pack and automobile
CN212011114U (en) * 2020-04-26 2020-11-24 宁德时代新能源科技股份有限公司 Secondary battery, battery module, and device using secondary battery as power supply
CN113871682B (en) * 2021-09-09 2024-03-08 湖北润烨新能源有限公司 Novel square lithium battery assembling method

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KR100954037B1 (en) * 2007-11-19 2010-04-20 삼성에스디아이 주식회사 Secondary battery
CN101662045B (en) * 2008-08-26 2013-07-24 比亚迪股份有限公司 Electrode core assembly and battery containing same
CN201936935U (en) * 2010-05-31 2011-08-17 比亚迪股份有限公司 Battery spacer, core protecting structure and power battery
CN102593405B (en) * 2011-01-06 2015-03-25 广州七喜工控科技有限公司 Cylindrical storage battery
CN202142599U (en) * 2011-07-20 2012-02-08 吉安市优特利科技有限公司 Connecting assembly of polar ear and cover plate of lithium ion power battery
CN202855832U (en) * 2012-09-21 2013-04-03 迪吉亚节能科技股份有限公司 Lithium battery structure

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN106450122A (en) * 2016-11-21 2017-02-22 华霆(合肥)动力技术有限公司 Battery connection structure and battery pack
CN111697170A (en) * 2020-06-23 2020-09-22 欣旺达电动汽车电池有限公司 Bi-pass single battery, assembling method thereof and battery pack
CN111697191A (en) * 2020-06-23 2020-09-22 欣旺达电动汽车电池有限公司 Splicing type long power battery, assembling method thereof and battery pack
CN111697170B (en) * 2020-06-23 2023-10-31 欣旺达动力科技股份有限公司 Bi-pass single battery, assembling method thereof and battery pack

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Granted publication date: 20130904

Termination date: 20190409