CN201233919Y - Lithium ionic cell covering cap device - Google Patents

Lithium ionic cell covering cap device Download PDF

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Publication number
CN201233919Y
CN201233919Y CNU200820075568XU CN200820075568U CN201233919Y CN 201233919 Y CN201233919 Y CN 201233919Y CN U200820075568X U CNU200820075568X U CN U200820075568XU CN 200820075568 U CN200820075568 U CN 200820075568U CN 201233919 Y CN201233919 Y CN 201233919Y
Authority
CN
China
Prior art keywords
diaphragm
orifice plate
circle
packing ring
plastic ring
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
CNU200820075568XU
Other languages
Chinese (zh)
Inventor
蔡燕云
李福兴
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.)
TIANJIN BATTERY ELECTRONIC CO Ltd
Original Assignee
TIANJIN BATTERY ELECTRONIC 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 TIANJIN BATTERY ELECTRONIC CO Ltd filed Critical TIANJIN BATTERY ELECTRONIC CO Ltd
Priority to CNU200820075568XU priority Critical patent/CN201233919Y/en
Application granted granted Critical
Publication of CN201233919Y publication Critical patent/CN201233919Y/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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    • 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 model relates to a lithium ion cap device which is constructed through the following steps: a diaphragm (4), a gasket (3), and a top cover (2) are arranged in a plastic ring (1) and sealed and pressed; and a pore plate (5) is installed at and connected with the bottom of the diaphragm(4) in the multi-spot welding manner. The device mainly solves the disadvantages of the prior art that the pore plate and the diaphragm deforms along with the deformation of the plastic ring under the exogenic action, so that the welding spot is even caused to break, the pore plate is caused to fall off, and short circuit is produced to lead the battery to explode and finally be scrapped; or the welding spot between the pore plate and the diaphragm breaks pressure and the pressure value of the diaphragm explosion changes along with the breaking pressure so as to influence the product quality. The utility model is characterized in that a hole is formed in the middle bottom of the plastic ring (1); a flat hem is formed around the plastic ring(1); the gasket (3) is made of an elastic metal material; an insulating sleeve (7) is arranged on the pore plate (5); and a certain clearance is formed between the inner wall of the plastic ring (1) and the insulating sleeve(7). When a battery cap and the battery casing (14) encapsulate an embedded port, the deformation of the plastic ring (1) is generated under the exogenic action and the clearance is between the inner wall of the plastic ring (1) and the insulating sleeve(7) arranged on the pore plate (5). Therefore, enough space is reserved for the deformation of the plastic ring, thereby enabling the pore plate (5) and the diaphragm to be not effected by the pulling force, the relative fitting position to not change, and the pore plate (5) to not fall off, the short circuit of the battery is avoided, and the pressure value of the welding point break and diaphragm (4) explosion are stable.

Description

A kind of lithium ion battery cover device
Affiliated technical field
The utility model relates to a kind of lithium ion battery critical component block device.
Background technology
The block device of lithium ion battery is the critical component of lithium ion battery, and it is related to the quality and the cost of reliability of products, product, has influence on the producer, consumer's personal safety.Up-to-date lithium ion battery cover is formed (patent No. ZL2005200254023 lithium ion battery safety anti-explosive device) it is structurally had drawback by moulding circle, top cover, packing ring, diaphragm, orifice plate at present.When lithium ion battery cover and battery container encapsulation, mould circle and produce crimp under external force, push orifice plate simultaneously is out of shape thereupon, because of many phase of solder joints between orifice plate and the diaphragm are connected, diaphragm also produces certain distortion, if along with the distortion of moulding circle strengthens, solder joint is drawn back, cause orifice plate to come off, cause entire cell to scrap.In battery cap and battery container encapsulation process, though orifice plate does not come off, also can pull because of orifice plate and diaphragm are squeezed in encapsulation process, have influence on the pop stability of pressure of solder joint opening pressure, diaphragm between orifice plate and the diaphragm, product quality reliability is subjected to certain influence, has a strong impact in case these products inflow societies will bring to goodwill.When battery overcharge, after the solder joint that is connected between orifice plate and diaphragm is thrown off, orifice plate easily with battery container inwall overlap joint formation short circuit, cause battery explosion.
Summary of the invention
When solving lithium ion battery cover and battery container encapsulation embedding mouth, to mould circle and produce crimp under external force, orifice plate and diaphragm be also along with distortion, even cause solder joint disconnection therebetween, and orifice plate comes off, and causes entire cell to scrap.Even solder joint does not disconnect between orifice plate and the diaphragm, generally speaking, orifice plate and diaphragm also can be squeezed in whole encapsulation process and pull, and solder joint opening pressure, the diaphragm pressure that pops changes thereupon between orifice plate and the diaphragm, influences product quality; And during battery overcharge, owing to overcharge the effect of gas, after solder joint was thrown off between orifice plate and diaphragm, orifice plate came off and battery container inwall overlap joint forms short circuit, prevented the problem of battery explosion and improved the stability problem of battery cap internal resistance.
The technical scheme that the utility model technical solution problem is adopted is, the cells known block is formed by moulding circle, top cover, packing ring, diaphragm, orifice plate at present.It is characterized in that the known circle, packing ring, orifice plate moulded changed a social system.Moulding circle profile upper end has to the inner plane flanging, and outer wall is a stairstepping, in the middle of the bottom individual hole is arranged, and its periphery has individual platform, and the diameter in hole is less than the orifice plate external diameter, and has increased the thickness of moulding between ring outer wall and the inwall.Packing ring adopts the rubber-like metal to make, or makes uneven rubber-like annulus at packing ring plane periphery.The injection moulding of orifice plate circumferential perimeter has increased an insulating case, mould and diaphragm, packing ring, top cover are housed in the circle successively and seal pressure, its upper end forms an inside plane flanging and is pressed on the cap base plane, orifice plate is contained on the diaphragm bottom surface and connects with many solder joints, insulating case on the orifice plate and mould circle and certain interval is arranged between the inwall has constituted this device.When battery cap and battery container encapsulation embedding mouth, to mould circle and produce crimp under external force, the increase of wall thickness has slowed down the degree of deformation of moulding circle, and insulating case is to mould circle to be out of shape and to leave enough spaces with moulding gap between the circle inwall on the orifice plate.Therefore, orifice plate does not produce distortion along with moulding the circle distortion, this has just guaranteed that orifice plate and diaphragm can not produce pulling function, rigging position is constant relatively, the solder joint that is connected between orifice plate and the diaphragm just can not broken or cause and pull, and solder joint opening pressure, the diaphragm pressure stability reliability that pops has had assurance.When lithium ion battery overcharged, even orifice plate comes off, owing to mould setting off of circle base apertures peripheral platform, orifice plate can not drop out with battery container inwall overlap joint yet and form short circuit.Because packing ring has adopted and had elastomeric material and increased and top cover, coefficient of friction between the diaphragm has good contact each other, and the contact internal resistance is reduced, and block internal resistance performance is more stable.
The utility model advantage and effect are: because the change that this device is moulded circle, orifice plate shape and washer-shaped, materials used, solved when battery cap and battery container encapsulation embedding mouth, mould circle and under the effect of external force, produce crimp, and orifice plate and diaphragm are not subjected to tension, rigging position is constant relatively in moulding circle, solder joint opening pressure, the diaphragm stability of pressure value that pops that guaranteed to be connected between orifice plate and the diaphragm has prevented that cell package process aperture plate from coming off.When battery overcharge,, orifice plate can not form short circuit with battery container inwall overlap joint even coming off yet.Because packing ring has adopted the rubber-like metal material to make, and has increased and top cover, coefficient of friction between the diaphragm has good contact each other, and block internal resistance performance is more stable; Thereby guaranteed product quality, improved reliability of products., reduced percent defective, increased output, reduced cost, the producer, consumer's personal safety have obtained guarantee.
Description of drawings
Below in conjunction with accompanying drawing and example the utility model is further specified
Fig. 1: a kind of lithium ion battery cover device
Mould circle 1, top cover 2, packing ring 3, diaphragm 4, orifice plate 5, sealing platform 6, insulating case 7, seal boss 8, steam vent 9, indentation 10, pore 11, solder joint 12.
Fig. 2: structural representation when a kind of lithium ion battery cover device and battery container encapsulation embedding mouth
Mould circle 1, top cover 2, packing ring 3, diaphragm 4, orifice plate 5, sealing platform 6, insulating case 7, seal boss 8, steam vent 9, indentation 10, pore 11, solder joint 12, lug 13, housing 14.
Specific embodiments
Shown in Figure 1: as to mould circle 1 and be and use that the PP material of chemical reaction does not take place is injection molded with electrolyte, can carry out impregnation in order to increase the sealing surface, injecting glue is handled.Moulding its upper end of circle 1 profile has individual to the inner plane flanging, outer wall is up big and down small stepped, a band plane stepped hole is arranged in the middle of the bottom, and the diameter of phi 5.8mm in hole-Φ 14mm is less than the outside dimension Φ 6mm-Φ 15mm of orifice plate 5, and increased the thickness of moulding between circle 1 outer wall and the inwall.Packing ring 3 adopts rubber-like metal foam nickel, and foamed aluminium is made or made uneven rubber-like annulus at packing ring plane periphery.Orifice plate 5 injection moulding on circumferential perimeter has increased an insulating case 7, its end face and mould circle and 0.5mm is arranged between the inwall---1mm gap is moulded in the circle 1 and diaphragm 4 is housed successively, packing ring 3, top cover 2 also seals pressure, and its upper end forms an inside plane flanging and is pressed on top cover 2 bottoms along on the plane, limit.Orifice plate 5 is contained in diaphragm 4 frustum groove bottom, adopts the laser multiple spot welding to be connected, and constitutes a kind of lithium ion battery cover device of the utility model.
Shown in Figure 2: structure chart when a kind of lithium ion battery cover device of the utility model and battery container encapsulation embedding mouth.Block will link to each other with the battery positive plate by pore 11 peripheral soldering polar ears 13 on orifice plate 5 before encapsulating with battery container 14.Mould circle 1 and produce crimp under external force, mould that the thickness increase has weakened the degree of deformation of moulding circle 1 between circle 1 outer wall and the inwall, insulating case 7 and mould circle and 0.5mm is arranged between 1 inwall on orifice plate 5 circumferential perimeter---1mm gap, enough deformation spaces have been reserved for moulding circle 1, thereby be contained in and mould the orifice plate 5 of circle in 1 and can not be out of shape with the distortion of moulding circle 1, this has just guaranteed that orifice plate 5 and diaphragm 4 do not produce pulling function, rigging position is constant relatively, the laser solder joint 12 that is connected between orifice plate 5 and the diaphragm 4 just can not broken yet, solder joint 12 opening pressures, diaphragm 4 pressure that pops keeps stable, because packing ring 3 adopts rubber-like metal foam nickel, foamed aluminium is made, or on the peripheral plane of gasket hole, make uneven rubber-like annulus, packing ring 3 has increased and top cover 2 diaphragms, 4 coefficient of friction that is in contact with one another and contact points, good contact has been arranged each other, and the internal resistance value that makes battery cap is by reducing to below the 1m Ω stable performance of internal resistance more than the former 10m Ω.When lithium ion battery overcharges, even solder joint 12 disconnection orifice plates 5 come off between orifice plate 5 and the diaphragm 4, set off owing to mould circle 1 bottom interstitial hole peripheral plane platform, also can not produce short circuit with battery container 14 inwalls overlap joint, guaranteed the safe handling of product.

Claims (3)

1. lithium ion battery cover device, by moulding circle, top cover, packing ring, diaphragm, orifice plate is formed, it is characterized in that: with the known circle of moulding, packing ring, orifice plate is made respectively and is moulded circle (1), packing ring (3), orifice plate (5), it is up big and down small stepped moulding circle (1) outer wall, a band plane stepped hole is arranged in the middle of the bottom, the diameter of step base apertures is less than orifice plate (5) outside dimension, and increased and moulded thickness between circle (1) outer wall and the inwall, orifice plate (5) is gone up circumferential perimeter an insulating case (7), insulating case (7) and mould between circle (1) inwall 0.5mm-1mm gap is arranged, packing ring (3) adopts the rubber-like nickel foam, foamed aluminium, mould diaphragm (4) is housed in the circle (1) successively, packing ring (3), top cover (2) also seals pressure, its upper end forms an inside plane flanging and is pressed on top cover (2) bottom along on the plane, limit, and orifice plate (5) is contained in diaphragm (4) bottom and is connected with multiple spot welding.
2. according to claim 1, a kind of lithium ion battery cover device is characterized in that, packing ring (3) is made uneven rubber-like annulus at packing ring plane periphery.
3. according to claim 1, a kind of lithium ion battery cover device is characterized in that, moulds circle (1) but impregnation, injecting glue, is connected accordingly with top cover (2), packing ring (3), diaphragm (4), orifice plate (5) more thereafter.
CNU200820075568XU 2008-07-29 2008-07-29 Lithium ionic cell covering cap device Expired - Fee Related CN201233919Y (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CNU200820075568XU CN201233919Y (en) 2008-07-29 2008-07-29 Lithium ionic cell covering cap device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CNU200820075568XU CN201233919Y (en) 2008-07-29 2008-07-29 Lithium ionic cell covering cap device

Publications (1)

Publication Number Publication Date
CN201233919Y true CN201233919Y (en) 2009-05-06

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Family Applications (1)

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CNU200820075568XU Expired - Fee Related CN201233919Y (en) 2008-07-29 2008-07-29 Lithium ionic cell covering cap device

Country Status (1)

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102034939A (en) * 2009-09-28 2011-04-27 深圳市比克电池有限公司 Battery cap assembly and battery
CN102244211A (en) * 2010-05-14 2011-11-16 深圳市比克电池有限公司 Cell cover cap combination and cylindrical secondary cell
WO2012019371A1 (en) * 2010-08-09 2012-02-16 天津佰特瑞电子有限公司 Ternary protection lithium ion battery cap
CN101556993B (en) * 2009-05-15 2013-02-13 东莞新能源科技有限公司 Lithium ion battery combination block
CN103647105A (en) * 2013-12-12 2014-03-19 奇瑞汽车股份有限公司 Power battery

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101556993B (en) * 2009-05-15 2013-02-13 东莞新能源科技有限公司 Lithium ion battery combination block
CN102034939A (en) * 2009-09-28 2011-04-27 深圳市比克电池有限公司 Battery cap assembly and battery
CN102244211A (en) * 2010-05-14 2011-11-16 深圳市比克电池有限公司 Cell cover cap combination and cylindrical secondary cell
WO2012019371A1 (en) * 2010-08-09 2012-02-16 天津佰特瑞电子有限公司 Ternary protection lithium ion battery cap
CN103647105A (en) * 2013-12-12 2014-03-19 奇瑞汽车股份有限公司 Power battery

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GR01 Patent grant
EXPY Termination of patent right or utility model
CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20090506

Termination date: 20140729