CN102110852A - Cylindrical lithium ion battery structure suitable for series connection and parallel connection - Google Patents

Cylindrical lithium ion battery structure suitable for series connection and parallel connection Download PDF

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Publication number
CN102110852A
CN102110852A CN2009102006374A CN200910200637A CN102110852A CN 102110852 A CN102110852 A CN 102110852A CN 2009102006374 A CN2009102006374 A CN 2009102006374A CN 200910200637 A CN200910200637 A CN 200910200637A CN 102110852 A CN102110852 A CN 102110852A
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CN
China
Prior art keywords
lithium ion
battery
ion battery
cylindrical lithium
series
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
CN2009102006374A
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Chinese (zh)
Inventor
曹辉
赵文鹏
师绍纯
王颖
侯敏
张建文
解晶莹
王东
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.)
Shanghai Aerospace Power Technology Co Ltd
Shanghai Institute of Space Power Sources
Original Assignee
Shanghai Aerospace Power Technology Co Ltd
Shanghai Institute of Space Power Sources
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 Shanghai Aerospace Power Technology Co Ltd, Shanghai Institute of Space Power Sources filed Critical Shanghai Aerospace Power Technology Co Ltd
Priority to CN2009102006374A priority Critical patent/CN102110852A/en
Publication of CN102110852A publication Critical patent/CN102110852A/en
Pending legal-status Critical Current

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Classifications

    • 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

Abstract

The invention discloses a cylindrical lithium ion battery structure suitable for series connection and parallel connection. The structure comprises a round cover plate, a bulged round step is arranged in the center of the cover plate, a metal wire pillar is arranged in the step, and the space between the metal wire pillar and the round step is sealed in an insulating manner through sintering of special glass; the lower end of the wire pillar adopts a flat structure distributed with tabs, and the upper end of the wire pillar is connected with a serial port or a parallel port of a battery through welding or riveting, or by a screw stud; and a fluid filler opening is formed on a pole. By adopting the structure to realize quick and reliable series connection and parallel connection among batteries, the internal resistance is effectively lowered, the large multiplying power charge-discharge of a power type cylindrical lithium ion battery can be realized, the series connection and parallel connection of a large amount of individual cells can be realized, the technical level of the cylindrical battery can be further developed, and the industrialization of the cylindrical battery combination is promoted.

Description

A kind of suitable series-parallel cylindrical lithium ion battery structure
Technical field:
The present invention relates to technical field of lithium ion, be specifically related to a kind of connection in series-parallel cylindrical lithium ion battery structure.
Background technology:
Lithium ion battery belongs to the high-energy battery system, has that operating voltage height, operating temperature range are wide, a long service life, the high outstanding advantage of specific energy.Commercial from nineteen ninety Sony release with since the lithium ion battery, lithium ion battery has passed through developing stage fast, particularly the electrokinetic cell field for example, electric motor car and hybrid electric vehicle are paid much attention to, lithium ion battery is just becoming the potential market of power-type lithium ion battery maximum.In addition, the exhaustion of primary energy, the development of new forms of energy makes energy resource structure and transmission means that new change take place; The traditional industries of electrical network and electric power are faced with huge challenge.Distributed generation of electricity by new energy mode and intelligent grid technology also obtain various countries and pay much attention to.The commercial li-ion battery cell mainly contains three kinds of structures at present, is respectively square bar housing battery, cylindrical battery and polymer battery.Wherein, cylindrical battery becomes output maximum in three kinds of battery structures, range of application is the widest, the user accepts most battery types with advantages such as its batch product equipment maturation, high conformities.Along with further developing of market, following lithium ion battery market will further be developed to big dynamical system (electric automobile/storage battery) direction, needs the extraordinary battery cell connection in series-parallel of consistency in enormous quantities to use, and can pass through high current charge-discharge.In the existing battery structure, cylindrical battery can satisfy the conformance requirement of battery pack combo, but conventional cylindrical battery (18650/26650/32650 etc.) model has adopted the structure of slot rolling seal type, string PTC sheet in the battery cover, cause the internal resistance of cell bigger than normal, be not suitable for high current charge-discharge, and connection in series-parallel connection inconvenience, the battery cell structure that novel internal resistance is littler, be easier to connect be badly in need of.
Summary of the invention
Problem to be solved by this invention makes at existing cylindrical battery and assemble difficulty in assembling process, reliability is relatively poor, internal resistance reaches the more weak shortcoming of fail safe more greatly, the present invention proposes a kind of cylinder power lithium-ion battery of connection in series-parallel combination, this battery comprises battery case (7), cover plate (1) two parts, adopt laser welding to form between the two, described cover plate (1) is round, there is circular aperture at the edge, (descend) surface to paste layer of metal paper tinsel (6) thereon, the centre also is provided with one and protrudes round step, employing is installed on the step between plain conductor post (3) and the round step special glass is sintering insulated and be tightly connected, described wire column (3) lower end is furnished with lug for the flat structure, and the upper end is that welding is passed through in battery serial ports or parallel port, riveted joint, the double-screw bolt form connects; Described lug and wire column welding; Liquid injection port (8) is arranged on the pole.
The above this structure of employing is to realize quick, the reliable connection in series-parallel connection between the battery and can effectively reduce internal resistance.Not only can realize the target of dynamic column lithium ion battery high rate charge-discharge, and can realize the connection in series-parallel of a large amount of battery cells.Obtained the technical merit of further expansion cylindrical battery, effect is had a mind in the industrialization that promotes the cylindrical battery combination.
Specific embodiment
Further specify the present invention below in conjunction with accompanying drawing.
Be a kind of cylindrical lithium ion battery structural representation of can connection in series-parallel using of the present invention as shown in Figure 1, comprise battery case (7), cover plate (1) two parts by cylindrical lithium ion battery shown in the figure, adopt laser welding to form between the two, cover plate (1) is round, there is circular aperture at the edge, (descend) surface to paste layer of metal paper tinsel (6) thereon, the centre also is provided with one and protrudes round step, employing is installed on the step between plain conductor post (3) and the round step special glass is sintering insulated to be tightly connected; Adopt the flat structure to be furnished with lug in wire column (3) lower end, lug and wire column welding; The upper end of wire column (3) is that battery serial ports or parallel port connect by welding, riveted joint, double-screw bolt form; Liquid injection port (8) is arranged on the pole.
As Fig. 2 is a kind of power-type 26650 size battery housings, and wherein, the both positive and negative polarity pole is drawn from both sides respectively, aluminium pole just very, and negative pole is the copper-base post.At inside battery, adopted the connected mode of multipole ear laser welding between positive pole ear and the pole, adopted the mode (multilayer spot welding) of resistance welded between negative lug and the pole.The sealing means of glass sintering has all been adopted in sealing between battery cover and the pole.The relief valve design of battery has adopted the Copper Foil of 20 micron thickness.The present invention has avoided the internal resistance that the importing of PTC causes to increase, and simultaneously, the connection of both positive and negative polarity all avoided the conventional cylindrical battery point end, put phenomenons such as covering the internal resistance increase that may cause because of solder joint is unique in the process, reliability reduction.In the designed ferric phosphate lithium cell, under the constant condition of battery capacity, the battery cell internal resistance is in 6 milliohms, be significantly smaller than the internal resistance (more than general 15 milliohms) of present conventional commercial equal size battery, can realize 30-50C continuous discharge (battery of the similar model structure of present conventional commercialization only can be realized the 15-20C discharge).In addition, battery excuse tail has all been reserved connection space, and battery cell makes up by riveted joint or laser welding mode easily, and has significantly improved the reliability of combination.

Claims (6)

  1. One kind can series-parallel cylindrical lithium ion battery structure, it is characterized in that, cell comprises battery case (7), cover plate (1) two parts composition, adopt laser welding between the two, described cover plate (1) is round, and there is circular aperture at the edge, thereon, lower surface pastes layer of metal paper tinsel (6), the centre also is provided with one and protrudes round step, employing is installed on the step between plain conductor post (3) and the round step special glass is sintering insulated to be tightly connected; Described wire column (3) lower end adopts the flat structure to be furnished with lug, lug and wire column (3) welding; The upper end of wire column (3) is that battery serial ports or parallel port connect by welding, riveted joint, double-screw bolt form; Liquid injection port (8) is arranged on the pole.
  2. According to claim 1 described a kind of can series-parallel cylindrical lithium ion battery structure, it is characterized in that plain conductor post (3) adopts copper, aluminium, kovar alloy, nickel alloy or other material.
  3. According to claim 1 or 2 described a kind of can series-parallel cylindrical lithium ion battery structure, it is characterized in that plain conductor post (3) upper and lower side is screw-type, compression joint type, the multiple connected mode of welded type.
  4. According to claim 1 described a kind of can series-parallel cylindrical lithium ion battery structure, it is characterized in that: metal film (6) is the Copper Foil of 5-50 micron thickness, aluminium foil or other metal/plastic film.
  5. According to claim 1 described a kind of can series-parallel cylindrical lithium ion battery structure, it is characterized in that: the cylinder battery casing size range comprises diameter 10mm-60mm, height 30mm-300mm; Typical products has cylindrical battery models such as 14500,18650,26650,32650,38130.
  6. According to claim 1 described a kind of can series-parallel cylindrical lithium ion battery structure, it is characterized in that: the both positive and negative polarity pole of battery is that draw respectively both sides, but also homonymy goes out 2 poles.
CN2009102006374A 2009-12-24 2009-12-24 Cylindrical lithium ion battery structure suitable for series connection and parallel connection Pending CN102110852A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009102006374A CN102110852A (en) 2009-12-24 2009-12-24 Cylindrical lithium ion battery structure suitable for series connection and parallel connection

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009102006374A CN102110852A (en) 2009-12-24 2009-12-24 Cylindrical lithium ion battery structure suitable for series connection and parallel connection

Publications (1)

Publication Number Publication Date
CN102110852A true CN102110852A (en) 2011-06-29

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CN2009102006374A Pending CN102110852A (en) 2009-12-24 2009-12-24 Cylindrical lithium ion battery structure suitable for series connection and parallel connection

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CN (1) CN102110852A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346274A (en) * 2013-07-04 2013-10-09 深圳市科达利实业股份有限公司 Power battery electrode sealing device and manufacturing method thereof
CN103500844A (en) * 2013-09-03 2014-01-08 浙江金开来新能源科技有限公司 Cylindrical multi-lug lithium ion battery and preparation method thereof
CN106891070A (en) * 2017-02-23 2017-06-27 深圳市科达利实业股份有限公司 A kind of copper-aluminum composite board, pole connecting board structure and battery
CN111354919A (en) * 2020-04-01 2020-06-30 湖北亿纬动力有限公司 Battery, liquid injection method of battery and battery module

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103346274A (en) * 2013-07-04 2013-10-09 深圳市科达利实业股份有限公司 Power battery electrode sealing device and manufacturing method thereof
CN103346274B (en) * 2013-07-04 2016-01-27 深圳市科达利实业股份有限公司 Power battery electrode sealing device and manufacture method thereof
CN103500844A (en) * 2013-09-03 2014-01-08 浙江金开来新能源科技有限公司 Cylindrical multi-lug lithium ion battery and preparation method thereof
CN103500844B (en) * 2013-09-03 2016-09-14 浙江金开来新能源科技有限公司 cylindrical multi-lug lithium ion battery and preparation method thereof
CN106891070A (en) * 2017-02-23 2017-06-27 深圳市科达利实业股份有限公司 A kind of copper-aluminum composite board, pole connecting board structure and battery
CN111354919A (en) * 2020-04-01 2020-06-30 湖北亿纬动力有限公司 Battery, liquid injection method of battery and battery module

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C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20110629