CN201219111Y - Lithium ion power cell - Google Patents

Lithium ion power cell Download PDF

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Publication number
CN201219111Y
CN201219111Y CNU200820120890XU CN200820120890U CN201219111Y CN 201219111 Y CN201219111 Y CN 201219111Y CN U200820120890X U CNU200820120890X U CN U200820120890XU CN 200820120890 U CN200820120890 U CN 200820120890U CN 201219111 Y CN201219111 Y CN 201219111Y
Authority
CN
China
Prior art keywords
battery cover
lithium
welding
battery
tab
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 - Lifetime
Application number
CNU200820120890XU
Other languages
Chinese (zh)
Inventor
王伯良
朱玉法
朱海燕
龚金保
余爱水
萧张兴
王叶滔
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.)
Hangzhou Golden Horse Energy Technology Co., Ltd.
Original Assignee
HANGZHOU SNSO BATTERY 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 HANGZHOU SNSO BATTERY CO Ltd filed Critical HANGZHOU SNSO BATTERY CO Ltd
Priority to CNU200820120890XU priority Critical patent/CN201219111Y/en
Application granted granted Critical
Publication of CN201219111Y publication Critical patent/CN201219111Y/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 utility relates to an accumulator, especially a lithium ion power battery. The utility is to solve problem of incontinuous welding method for single-point or multi-point welding for tab and battery cover; most weak connection style of anode tab and battery cover can not satisfy output demand for high magnification battery and big current. The utility comprises a shell; lithium poleshank and electrolytic liquor is in shell; battery cover is disposed at upper part of shell; the lithium poleshank is connected with tab of anode and cathode characterized in that the tab of anode is point-welding to battery cover by continuous laser welding method; welding area ring is provided at battery cover; the continuous laser welding point is provided at superposition of tab of anode and welding area ring; outer diameter of welding area ring Phi is between 0.5 to 25.0 mm.

Description

Lithium-ion-power cell
Technical field
The utility model relates to a kind of storage battery, especially relates to a kind of to the isostructural improvement of lithium-ion-power cell.
Background technology
In recent years, the lithium ion power storage battery development is swift and violent, and lithium-ion-power cell is compared with traditional lithium ion battery and required the bigger power of battery output.Chinese patent discloses a kind of lithium ion battery (Granted publication number: CN 2662460Y), it comprises a housing, it is the ccontaining box body of metal of end sealing, its housing is provided with the electrode tip that negative pole end and sealing ring constitute, this negative pole end also extends to formation one compressing tablet in the housing, and this compressing tablet is in addition in conjunction with a lead that extends downwards; One base plate is incorporated into the housing bottom, and inside is provided with an insulation layer; One electrode group, inside are provided with the electrode roll that tool positive and negative electrode assembly and intervenient barrier film are constituted, and it is arranged in the enclosure space that is constituted with base plate in the housing, and the anodal current terminal on it is incorporated on the base plate, and the cathodal current end is connected with lead; This housing be shaped as positive square, rectangle or long ellipse.But it is the same with most of lithium batteries, promptly shown in stain among Fig. 1, lug wherein and battery cover adopt laser single-point or multiple spot to weld discontinuous welding method, the connected mode of anode ear and battery cover is the weakest link in the way of output of whole electric current, is difficult to satisfy the output requirement of electrokinetic cell high magnification and big electric current.
The utility model content
The purpose of this utility model provides a kind of lithium-ion-power cell, it mainly is to solve existing in prior technology lug and battery cover employing laser single-point or multiple spot to weld discontinuous welding method, the connected mode of anode ear and battery cover is the weakest link in the way of output of whole electric current, is difficult to satisfy the technical problem of the output requirement etc. of electrokinetic cell high magnification and big electric current.
Above-mentioned technical problem of the present utility model is mainly solved by following technical proposals:
Lithium-ion-power cell of the present utility model, comprise housing, be provided with lithium ion pole piece and electrolyte in the housing, the housing upper end is provided with battery cover, the lithium ion pole piece is connected with positive and negative lug, it is characterized in that the anode ear that described lithium ion pole piece upper end connects passes through the continuous laser welding means of spot welds on battery cover, and battery cover is provided with the welding region ring, the continuous laser solder joint is located at the part that overlaps of anode ear and welding region ring, and diameter of a circle φ is 10.5~25.0mm in the welding region ring.Anode ear is distributed in the welding region ring of battery cover, the continuous laser solder joint is located at the part that overlaps of whole welding region ring and anode ear, make bonding area increase, therefore can satisfy the requirement of electrokinetic cell high magnification and big electric current, " opening circuit " phenomenon reduces to 0 by 0.52% before implementing in the battery production defective item statistics, with column type 26650 batteries is example, and the battery average temperature rising reduces by 2.3 ℃, and power output improves 5.7%.
As preferably, the width D of described welding region ring is 4.0~11.0mm.
Therefore, the soldering reliability that the utlity model has battery is higher, breaking phenomena is less in the battery production defective item statistics, CURRENT DISTRIBUTION is more even, under different state-of-charges battery is dissected, the apparent colour of electrode is more even, and the battery temperature rise of battery under high-power output situation is lower, characteristics such as the high-power fan-out capability of battery is bigger, and is simple and reasonable for structure.
Description of drawings
Accompanying drawing 1 is the structural representation of existing lithium-ion-power cell;
Accompanying drawing 2 is a kind of structural representations of the present utility model.
Embodiment
Below by embodiment, and in conjunction with the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment: the lithium-ion-power cell that this is routine, as Fig. 2, the housing 1 of a battery is arranged, in the housing 1 electrolyte is housed, be inserted with lithium ion pole piece 2 in the electrolyte, lithium ion pole piece 2 is connected with positive and negative lug.Housing 1 upper end is provided with battery cover 5, and battery cover 5 is provided with welding region ring 6, and the anode ear 3 that lithium ion pole piece 2 upper ends connect is welded in the welding region ring 6 of battery cover by continuous laser solder joint 4.Continuous laser solder joint 4 is distributed in the part that overlaps of anode ear 3 and welding region ring 6.The diameter phi of welding region ring 6 cylindricals is 14mm, and width D is 5.5mm.
During use, lithium-ion-power cell is inserted big powered device get final product.

Claims (2)

1. lithium-ion-power cell, comprise housing (1), be provided with lithium ion pole piece (2) and electrolyte in the housing (1), housing (1) upper end is provided with battery cover (5), lithium ion pole piece (2) just is connected with, negative electrode lug, it is characterized in that the anode ear (3) that described lithium ion pole piece (2) upper end connects is welded on the battery cover (5) by continuous laser solder joint (4), battery cover (5) is provided with welding region ring (6), continuous laser solder joint (4) is located at the part that overlaps of anode ear (3) and welding region ring (6), and the diameter phi of welding region ring (6) cylindrical is 10.5~25.0mm.
2. lithium-ion-power cell according to claim 1, the width D that it is characterized in that described welding region ring (6) is 4.0~11.0mm.
CNU200820120890XU 2008-07-04 2008-07-04 Lithium ion power cell Expired - Lifetime CN201219111Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200820120890XU CN201219111Y (en) 2008-07-04 2008-07-04 Lithium ion power cell

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200820120890XU CN201219111Y (en) 2008-07-04 2008-07-04 Lithium ion power cell

Publications (1)

Publication Number Publication Date
CN201219111Y true CN201219111Y (en) 2009-04-08

Family

ID=40541946

Family Applications (1)

Application Number Title Priority Date Filing Date
CNU200820120890XU Expired - Lifetime CN201219111Y (en) 2008-07-04 2008-07-04 Lithium ion power cell

Country Status (1)

Country Link
CN (1) CN201219111Y (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102867936A (en) * 2011-07-05 2013-01-09 珠海银通新能源有限公司 High capacity battery and assembly method thereof
CN104091912A (en) * 2014-07-22 2014-10-08 合肥国轩高科动力能源股份公司 Multi-tab lithium battery core and welding method of multi-tab lithium battery tab
CN106552994A (en) * 2017-01-13 2017-04-05 上海德朗能动力电池有限公司 A kind of block welding method of lithium ion battery and welding structure
CN106735898A (en) * 2017-01-13 2017-05-31 上海德朗能动力电池有限公司 The block welding method and welding structure of a kind of lithium ion battery
CN107335916A (en) * 2017-06-29 2017-11-10 大族激光科技产业集团股份有限公司 A kind of cylindrical battery pole ear welding method

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102867936A (en) * 2011-07-05 2013-01-09 珠海银通新能源有限公司 High capacity battery and assembly method thereof
CN104091912A (en) * 2014-07-22 2014-10-08 合肥国轩高科动力能源股份公司 Multi-tab lithium battery core and welding method of multi-tab lithium battery tab
CN106552994A (en) * 2017-01-13 2017-04-05 上海德朗能动力电池有限公司 A kind of block welding method of lithium ion battery and welding structure
CN106735898A (en) * 2017-01-13 2017-05-31 上海德朗能动力电池有限公司 The block welding method and welding structure of a kind of lithium ion battery
CN107335916A (en) * 2017-06-29 2017-11-10 大族激光科技产业集团股份有限公司 A kind of cylindrical battery pole ear welding method

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Legal Events

Date Code Title Description
C14 Grant of patent or utility model
GR01 Patent grant
ASS Succession or assignment of patent right

Owner name: HANGZHOU GOLDEN HORSE ENERGY TECHNOLOGY CO., LTD.

Free format text: FORMER OWNER: HANGZHOU SNSO BATTERY CO., LTD.

Effective date: 20110610

C41 Transfer of patent application or patent right or utility model
COR Change of bibliographic data

Free format text: CORRECT: ADDRESS; FROM: 311200 ROOM 504, VENTURE CENTER, NO. 28, TONGHUI NORTH ROAD, XIAOSHAN DISTRICT, HANGZHOU CITY, ZHEJIANG PROVINCE TO: 311232 NO. 117, HONGXING ROAD, QIAONAN AREA BLOCK, XIAOSHAN ECONOMIC AND TECHNOLOGICAL DEVELOPMENT ZONE, HANGZHOU CITY, ZHEJIANG PROVINCE

TR01 Transfer of patent right

Effective date of registration: 20110610

Address after: Hangzhou City, Zhejiang Province, 311232 blocks south of Xiaoshan economic and Technological Development Zone Hung Hing Road No. 117

Patentee after: Hangzhou Golden Horse Energy Technology Co., Ltd.

Address before: Xiaoshan Tong Hui Road District of Hangzhou City, Zhejiang province 311200 No. 28 business center room 504

Patentee before: Hangzhou Snso Battery Co., Ltd.

CX01 Expiry of patent term

Granted publication date: 20090408