CN201536119U - Novel lithium cell cover board - Google Patents

Novel lithium cell cover board Download PDF

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Publication number
CN201536119U
CN201536119U CN2009202606877U CN200920260687U CN201536119U CN 201536119 U CN201536119 U CN 201536119U CN 2009202606877 U CN2009202606877 U CN 2009202606877U CN 200920260687 U CN200920260687 U CN 200920260687U CN 201536119 U CN201536119 U CN 201536119U
Authority
CN
China
Prior art keywords
explosion
cover
annular edge
salient point
proof diaphragm
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
CN2009202606877U
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Chinese (zh)
Inventor
励建炬
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.)
SHENZHEN KEDALI INDUSTRIAL Co Ltd
Original Assignee
Shenzhen Kedali Industry 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 Shenzhen Kedali Industry Co ltd filed Critical Shenzhen Kedali Industry Co ltd
Priority to CN2009202606877U priority Critical patent/CN201536119U/en
Application granted granted Critical
Publication of CN201536119U publication Critical patent/CN201536119U/en
Anticipated expiration legal-status Critical
Expired - Lifetime 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 cell cover board, in particular to a novel lithium cell cover board with internal resistance less than 0.3 milliohms. The novel lithium cell cover board comprises a metal top cover which is arranged on the top portion of an electric core casing, wherein the top cover comprises a horizontally-arranged annular edge and a projection portion which is upwards bulged and formed with the annular edge in one piece, the lower portion of the top cover is provided with an explosion-proof membrane sheet which is equipped with a horizontally-arranged annular edge corresponding to the annular edge of the top cover, and a recess portion is formed on the explosion-proof membrane sheet at a position corresponding to the projection portion of the top cover, the bottom of the recess portion takes the shape of a plane surface, a nickel ring is positioned between the top cover and the inner cavity of the explosion-proof membrane sheet which is an aluminum membrane sheet, a downward projection point is arranged on the lower side of the nickel ring, an upward projection point is arranged on the upper side of the rim of the top cover, the annular edge of the explosion-proof membrane sheet tightly presses the annular edge and the nickel ring and then enwraps the annular edge and the nickel ring, the projection point of the nickel ring is downwards pressed in the inner cavity of the annular edge and the nickel ring, and the projection point of the top cover is upwards pressed in the inner cavity of the annular edge and the nickel ring. The novel lithium cell cover board has the beneficial effect that the internal resistance can be even smaller and generally achieve less than 0.3 milliohms.

Description

A kind of novel lithium battery cover plate
Technical field
The utility model relates to a kind of lithium battery cover plate, and referring more particularly to a kind of interior resistance is the following novel lithium battery cover plate of 0.3 milliohm.
Background technology
In recent years, because electronic equipment miniaturization day by day, lighting and portable bands such as video camera, electric tool, notebook computer, electric bicycle, and also develop to high power capacity, high security and lighting direction as the driving power that these electronic equipments are used.The totally-enclosed battery of lithium ion box hat is with characteristics such as the high power capacity of its electric core and part throttle characteristics excellences, and obtains increasingly extensive application.
Lithium-ion electric core is the accumulate parts of lithium battery, and it can produce abnormal gas along with the inside battery chemical reaction because of battery charger failure and factor such as too rechargeable in use, causes cell internal pressure excessive, thus generation battery explosion accident.Its consequence is damage equipment then gently, and is heavy then injure the user.Therefore, when cell internal pressure is excessive, for preventing battery explosion, must be with the gas leak in the battery.Its safeguard procedures normally are provided with protective device on battery cover.Existing protective device internal resistance is general common to be 8 milliohms, and present production technology can be accomplished below 5 milliohms.Along with the continual renovation of product, more and more higher to the requirement of high-performance charged lithium cells now, therefore also more and more higher to the interior resistance requirement of lithium battery cover plate, many product requirements reach the following even littler internal resistance of 1 milliohm.Therefore need a kind of interior little lithium battery cover plate of resistance now badly.
Based on above-mentioned the deficiencies in the prior art part, the inventor has developed the utility model " a kind of novel lithium battery cover plate ".
The utility model content
The utility model at above-mentioned the deficiencies in the prior art technical problem to be solved is: a kind of novel lithium battery cover plate is provided.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of novel lithium battery cover plate comprises a casting coping, and it is located at the top of electric core housing; Top cover comprises horizontally disposed annular edge edge and the integrally formed with it lug boss that raises up, the top cover bottom is provided with explosion-proof diaphragm, it has annular edge with described top cover along corresponding horizontally disposed annular edge edge, form lower concave part at the position relative with the lug boss of described top cover, the bottom of this lower concave part is the plane, so that contact with vent panel; Be provided with the nickel ring between described top cover downside and the explosion-proof diaphragm inner chamber, explosion-proof diaphragm is the aluminium diaphragm, be provided with in the downside of nickel ring and make explosion-proof diaphragm inner chamber and nickel loops close salient point downwards, top cover edge upside is provided with and combines more upwards salient point with explosion-proof diaphragm inner chamber, the annular edge of explosion-proof diaphragm encases after annular edge edge and nickel ring are compressed, the salient point of nickel ring is pressed in explosion-proof diaphragm inner chamber downwards, and the salient point of top cover upwards compresses mutually with explosion-proof diaphragm inner chamber.
The cross sectional shape of described top cover salient point and nickel ring salient point is respectively triangle or circular or other geometries.
The quantity of described top cover salient point and nickel ring salient point is respectively one or more.Generally can be set to 3 or 4.
The described explosion-proof diaphragm outside is arranged with ring-type insulated enclosure circle, is provided with vent panel in ring-type insulated enclosure circle bottom side
The beneficial effect of a kind of novel lithium battery cover plate of the utility model is:
Overcome the weak point of prior art to big electric current lithium battery cover plate high request, the utility model application of nickel ring, at nickel ring downside salient point is set, salient point is pressed in the Aluminum cover upside, because aluminium is the soft metal, therefore can presses embedding Aluminum cover surface by salient point, thereby make it in conjunction with tightr, interior resistance can be littler, generally reaches below 0.3 milliohm.
Can produce heat because therefore internal resistance exists in charging, below internal resistance 0.3 milliohm of the present utility model, therefore the heat that produces than resistance in the existing lithium battery is littler, so also safer.
The utlity model has that simple in structure, interior resistance is little, cost of manufacture is low, can cut off the power supply safely and characteristics such as pressure release, can be effectively and prevent battery explosion reliably.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is an overall structure decomposing schematic representation of the present utility model;
Fig. 2 is the nickel ring opposite side structural representation among Fig. 1;
Fig. 3 is the combining structure generalized section of explosion-proof diaphragm, nickel ring and top cover.
Embodiment
Below in conjunction with embodiment a kind of novel lithium battery cover plate that the technical program provides is narrated.
The utility model is to implement like this:
In Fig. 1 to Fig. 3, a kind of novel lithium battery cover plate comprises a casting coping 20, and it is located at the top of electric core housing; Top cover 20 comprises that horizontally disposed annular edge is along 21 and the integrally formed with it lug boss that raises up 22, top cover 20 bottoms are provided with explosion-proof diaphragm 30, the thin rounded flakes that described explosion-proof diaphragm 30 is made for aluminium, it have annular edge with described top cover 20 along 21 corresponding horizontally disposed annular edge along 33, form lower concave part 31 at the position relative with the lug boss 22 of described top cover, the bottom of this lower concave part is the plane, so that contact with vent panel 40; Be provided with nickel ring 50 between top cover 20 downsides and explosion-proof diaphragm 30 inner chambers, explosion-proof diaphragm 30 is the aluminium diaphragm, be provided with in the downside of nickel ring 50 and make explosion-proof diaphragm 30 inner chambers combine salient point 51 downwards with nickel ring 50, top cover 20 edge upsides are provided with and combine more upwards salient point 23 with explosion-proof diaphragm 30 inner chambers, the annular edge of explosion-proof diaphragm 30 along 33 with annular edge along 21 and nickel ring 50 encase after compressing, salient point 51 is pressed in explosion-proof diaphragm 30 inner chambers downwards, and the salient point 23 of top cover 20 upwards compresses mutually with explosion-proof diaphragm 30 inner chambers.Above-mentioned top cover 20, explosion-proof diaphragm 30, vent panel 40 form the positive pole of battery, and electric core housing then forms the negative pole of battery.In Fig. 2, the downside of nickel ring 50 is provided with downward salient point 51.
In Fig. 1, casting coping 20 and nickel ring 50 are packed into behind the explosion-proof diaphragm 30, the annular edge of explosion-proof diaphragm 30 along 33 with annular edge along 21 and nickel ring 50 compress after encasing, salient point 51 is pressed in explosion-proof diaphragm 30 inner chambers downwards, the salient point 23 of top cover 20 upwards compresses mutually with explosion-proof diaphragm 30 inner chambers.And then behind the ring-type insulated enclosure circle 60 of packing into ring-type insulated enclosure circle 60 edges are compressed.
In the present embodiment, top cover 20 upsides are provided with and make top cover 20 combine 3 salient points 23 more closely with explosion-proof diaphragm 30 inner chambers.Explosion-proof diaphragm 30 outsides are arranged with ring-type insulated enclosure circle 60, are provided with vent panel 40 in ring-type insulated enclosure circle 60 bottom sides.On the upper surface of explosion-proof diaphragm 30, be positioned at its annular edge and be provided with annular groove 32 with the joint portion of lower concave part 31 along 33.
The quantity of salient point 51 salient points 23 also can be other varying numbers and shape in addition.
The above, it only is a kind of preferred embodiment of a kind of novel lithium battery cover plate of the utility model, be not that technical scope of the present utility model is imposed any restrictions, every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model above any trickle modification, equivalent variations and modification that embodiment did.

Claims (4)

1. a novel lithium battery cover plate comprises a casting coping (20), and it is located at the top of electric core housing; Top cover (20) comprises that horizontally disposed annular edge is along (21) and the integrally formed with it lug boss that raises up (22), top cover (20) bottom is provided with explosion-proof diaphragm (30), it has the corresponding horizontally disposed annular edge edge, annular edge edge (21) (33) with described top cover (20), form lower concave part (31) at the position relative with the lug boss (22) of described top cover, the bottom of this lower concave part is the plane, so that contact with vent panel (40); It is characterized in that: be provided with nickel ring (50) between described top cover (20) downside and explosion-proof diaphragm (30) inner chamber, explosion-proof diaphragm (30) is the aluminium diaphragm, be provided with in the downside of nickel ring (50) and make explosion-proof diaphragm (30) inner chamber combine salient point (51) downwards with nickel ring (50), top cover (20) edge upside is provided with and combines more upwards salient point (23) with explosion-proof diaphragm (30) inner chamber, the annular edge of explosion-proof diaphragm (30) encases annular edge along (33) after (21) and nickel ring (50) compress, salient point (51) is pressed in explosion-proof diaphragm (30) inner chamber downwards, and the salient point (23) of top cover (20) upwards compresses mutually with explosion-proof diaphragm (30) inner chamber.
2. a kind of novel lithium battery cover plate according to claim 1 is characterized in that the cross sectional shape of described salient point (51) and salient point (23) is respectively triangle or circle.
3. a kind of novel lithium battery cover plate according to claim 1, the quantity that it is characterized in that described salient point (51) salient point (23) is respectively and is two or more.
4. a kind of novel lithium battery cover plate according to claim 1 is characterized in that described explosion-proof diaphragm (30) outside is arranged with ring-type insulated enclosure circle (60), is provided with vent panel (40) in ring-type insulated enclosure circle (60) bottom side.
CN2009202606877U 2009-11-25 2009-11-25 Novel lithium cell cover board Expired - Lifetime CN201536119U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2009202606877U CN201536119U (en) 2009-11-25 2009-11-25 Novel lithium cell cover board

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2009202606877U CN201536119U (en) 2009-11-25 2009-11-25 Novel lithium cell cover board

Publications (1)

Publication Number Publication Date
CN201536119U true CN201536119U (en) 2010-07-28

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CN2009202606877U Expired - Lifetime CN201536119U (en) 2009-11-25 2009-11-25 Novel lithium cell cover board

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CN (1) CN201536119U (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101916834A (en) * 2010-09-07 2010-12-15 天津力神电池股份有限公司 Low-resistivity cylindrical lithium ion battery cover with novel metallic gasket
CN101916835A (en) * 2010-09-07 2010-12-15 天津力神电池股份有限公司 Low-resistance cylindrical lithium ion battery cover with novel top cover
CN102227018A (en) * 2010-07-29 2011-10-26 天津力神电池股份有限公司 Low-resistance cylindrical lithium-ion battery cover
CN103137912A (en) * 2011-11-23 2013-06-05 广州鹏辉能源科技股份有限公司 Lithium battery cover cap

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102227018A (en) * 2010-07-29 2011-10-26 天津力神电池股份有限公司 Low-resistance cylindrical lithium-ion battery cover
CN101916834A (en) * 2010-09-07 2010-12-15 天津力神电池股份有限公司 Low-resistivity cylindrical lithium ion battery cover with novel metallic gasket
CN101916835A (en) * 2010-09-07 2010-12-15 天津力神电池股份有限公司 Low-resistance cylindrical lithium ion battery cover with novel top cover
CN103137912A (en) * 2011-11-23 2013-06-05 广州鹏辉能源科技股份有限公司 Lithium battery cover cap

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Legal Events

Date Code Title Description
GR01 Patent grant
C14 Grant of patent or utility model
CP01 Change in the name or title of a patent holder

Address after: 518109, Shenzhen Guangdong, Baoan District Province on the north side of Huaxing Road, built on the north side of the first industrial zone

Patentee after: Shenzhen Kedali Industrial Co., Ltd.

Address before: 518109, Shenzhen Guangdong, Baoan District Province on the north side of Huaxing Road, built on the north side of the first industrial zone

Patentee before: Shenzhen KDL Industrial Co., Ltd.

C56 Change in the name or address of the patentee

Owner name: SHENZHEN KEDALI INDUSTRIAL CO., LTD.

Free format text: FORMER NAME: SHENZHEN KEDALI INDUSTRY CO., LTD.

CX01 Expiry of patent term

Granted publication date: 20100728

CX01 Expiry of patent term