CN201194236Y - Special cover for lithium ion electrokinetic cell - Google Patents
Special cover for lithium ion electrokinetic cell Download PDFInfo
- Publication number
- CN201194236Y CN201194236Y CNU2008200323188U CN200820032318U CN201194236Y CN 201194236 Y CN201194236 Y CN 201194236Y CN U2008200323188 U CNU2008200323188 U CN U2008200323188U CN 200820032318 U CN200820032318 U CN 200820032318U CN 201194236 Y CN201194236 Y CN 201194236Y
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- CN
- China
- Prior art keywords
- battery
- contact pin
- cap
- lithium
- ion
- 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
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- Y—GENERAL 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
Abstract
The utility model relates to the technical field of a battery, particularly relates to special cover of a lithium ion drive battery with breaking protective function, comprising a battery top cover and a pair of round metal splices, wherein the metal splices are divided into an internal splice welded with a cathode and an external splice, a cathode lug of the battery is welded on the internal splice, and the external splice is contracted with the battery top cover. An eyelet with a flanging of a tunnel shape is arranged on the internal splice, and a capping sheet with a bottling shape is arranged correspondingly on the external splice. The capping sheet is elastically connected on the flanging of the tunnel shape. An insulating ring is used for insulating other contact parts except for a clip connecting part arranged between two splices. Compared with the prior art, impedance is decreased, which is suitable for performing larger current discharge of the battery; the way of elastic clip connection is adopted between the splices, which is convenient for manufacturing process, thereby greatly reducing manufacturing cost and insurance effect is not less than the prior art.
Description
Technical field
The utility model relates to the battery technology field, relates in particular to a kind of special cap with lithium-ion-power cell of break protecting.
Background technology
The world today is along with contradiction between oil supply and demand increasingly sharpens and to the enhancing day by day of environmental protection consciousness, the exploitation of this chemical power source of battery more and more is subjected to people's attention.Along with science and technology development, present various mechanism of new electrochemical power sources continues to bring out, lithium-ion-power cell is one of product that in recent years develops out, and it is the energy storage density height not only, and can overcome common lithium ion battery can not be under the heavy-current discharge situation shortcoming of operate as normal.Therefore, at present lithium-ion-power cell can replace plumbic acid and Ni-Cr battery and become the power supply of various electric tools, electric bicycle, battery-operated motor cycle etc., believes that in the near future lithium-ion-power cell will become the power source of automobile.For these reasons, its manufacturing technology of lithium-ion-power cell improves and commercially produces just more and more and be subject to people's attention.
Lithium ion battery is a kind of secondary cell.Common its shortcoming of lithium ion battery is can not carry out heavy-current discharge in use at present, thereby for the bigger electrical appliance of some instantaneous power demands, inapplicable as various electric tools and small-sized electric vehicle etc.Through research and development and the improvement of ten several years, lithium-ion-power cell of today can bear the heavy-current discharge requirement of high power electrical appliance fully, and Just because of this, the safety Design of lithium-ion-power cell is had higher requirement again.
Lithium-ion-power cell is recharged when excessive, can cause excessive lithium ion to take off embedding from negative pole, excessively embeds or cover positive pole then, causes making that the electric energy of input loses because of heating, does not have the effect of store electrical energy.Overcharge the thermal stability that can cause battery simultaneously and reduce, bring the potential safety hazard of thermal explosion or catching fire.In order to prevent that such accident from taking place, the manufacturer of lithium-ion-power cell all pays attention to the safety device of battery.
Under the condition of lithium-ion-power cell in normal running, its pressure inside is that a metastable numerical value is arranged.When abnormal operation occurring, particularly during charging is excessive, the pressure of inside battery will raise inevitably.Therefore, built-in pressure tripper has become the technical scheme that generally adopts as the safety device of lithium-ion-power cell.Be all can find in the Chinese patent application of CN 1450680A at the 4th, 943, No. 497 patents of the U.S., the 2nd, 099, No. 657 patents of Canada and publication number.
From above-mentioned patent or patent application as can be seen, built-in pressure tripper generally designs in the top cover of battery, its operation principle is: the metal contact pin of two contacts is set in cell circuit, when battery by misoperation and the battery internal gas pressure that arrives when exceeding predetermined value, two metal contact pin separate under gas pressure, thereby the loop is disconnected, to avoid battery generation thermal explosion or catching fire.
In this broken circuit protecting equipment, the connection of two metal contact pin is key technologies.From the prior art, two kinds of forms are arranged usually, a kind of is the mode of laser welding, and another kind then is the riveted joint mode.
More than two kinds of methods manufacturer of being lithium-ion-power cell adopt, they have separately advantage and deficiency.Utilize laser welding method ripe, its shortcoming is that the contact-making surface of two metal contact pin is very tiny, for powerful battery, this structure had both increased impedance, can cause local current densities too high again, the heat that generation can't be spread causes irreversible infringement to battery.The riveted joint mode has remedied the defective of laser welding mode to a great extent, but this frame mode has all proposed very strict process requirement for type selecting, the test of preparation, material of battery cap mould and the quality control when producing.Just because of this, use its production cycle of lithium-ion-power cell of riveted type broken circuit protecting equipment longer, production cost can be in any more.
Summary of the invention
The technical problems to be solved in the utility model is: for the shortcoming and the deficiency that overcome prior art, the utility model provides a kind of new-type lithium-ion-power cell special cap.
The technical solution adopted in the utility model is: a kind of lithium-ion-power cell special cap, it has battery cap and a pair of circular metal contact pin, contact pin and outer contact pin in metal contact pin is divided into by battery order from inside to outside, be welded with the negative pole auricle of battery in the interior contact pin, outer contact pin contacts with battery cap, interior contact pin is provided with an aperture with toroidal flange, the corresponding cap that is provided with a closing in shape in the contact pin outside, in cap elasticity is buckled in the contact pin on the toroidal flange of aperture, between two contact pin, be provided with in order to isolate among both the dead ring of other contacts site except that fastening position.
In order further to reduce battery impedance, described its periphery of outer contact pin upwards dig and with the peripheral position crimping of battery cap.
For further reinforced safety effect, the cap of described outer contact pin is provided with the intaglio bar that can be torn, on air pressure top that cap produces in by battery behind the toroidal flange of aperture in the interior contact pin, if the air pressure in the battery further strengthens, the intaglio bar on the cap will be torn so that gas therefrom dissipates in outer contact pin and the formed cavity of top cover.
Further, battery cap is provided with the exhaust hole that sheds for gas in the cavity.
The beneficial effects of the utility model are: compared to existing technologies, the contact-making surface between this its battery cap of lithium-ion-power cell special cap and contact pin, contact pin and the contact pin is bigger, so battery impedance reduces much relatively, and suitable battery carries out heavy-current discharge; Adopt the mode of elasticity snapping between contact pin and the contact pin, the convenient manufacture process of this lithium-ion-power cell special cap production cost is reduced greatly, and its safety effect is not second to prior art.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is the structural representation of the utility model under normal condition.
Fig. 2 is the structural representation of the utility model under the open circuit protection state.
Contact pin 211. toroidal flange 22. outer contact pin 221. caps 3. dead rings in 1. battery caps 21. among the figure
Embodiment
A kind of as shown in Figure 1 lithium-ion-power cell special cap, has battery cap 1 and a pair of circular metal contact pin, contact pin 21 and outer contact pin 22 in metal contact pin is divided into by battery order from inside to outside, be welded with the negative pole auricle of battery in the interior contact pin 21, outer contact pin 22 contacts with battery cap 1, interior contact pin 21 is provided with an aperture with toroidal flange 211, the corresponding cap 221 that is provided with a closing in shape in the contact pin outside 22, in cap 221 elasticity are buckled in the contact pin 21 on the toroidal flange 211 of aperture, between two contact pin, be provided with in order to isolate among both the dead ring 3 of other contacts site except that fastening position.
The cap 221 of outer contact pin 22 is provided with the intaglio bar that can be torn, on air pressure top that cap 221 produces in by battery behind the toroidal flange 211 of aperture in the interior contact pin, if the air pressure in the battery further strengthens, the intaglio bar on the cap 221 will be torn so that gas therefrom dissipates in outer contact pin 22 and the battery cap 1 formed cavity.
Special cover for lithium ion electrokinetic cell of the present utility model, its technical characterstic is: compared to existing Technology, the contact-making surface between its battery cap and contact pin, contact pin and the contact pin is bigger, so battery Impedance phase is a lot of to reducing, and suitable battery carries out heavy-current discharge; Adopt elasticity between contact pin and the contact pin The snapping mode, facilitate the manufacture process of this Special cover for lithium ion electrokinetic cell, make production cost big The big reduction, and its safety effect is not second to prior art.
Claims (4)
1. lithium-ion-power cell special cap, it is characterized in that: have battery cap (1) and a pair of circular metal contact pin, metal contact pin is divided into interior contact pin (21) and outer contact pin (22) by battery order from inside to outside, be welded with the negative pole auricle of battery in the interior contact pin (21), outer contact pin (22) contacts with battery cap (1), interior contact pin (21) is provided with an aperture with toroidal flange (211), the cap (221) that correspondence is provided with a closing in shape is gone up in contact pin outside (22), cap (221) elasticity is buckled in interior contact pin (21) and goes up on the toroidal flange (211) of aperture, is provided with between two contact pin in order to isolate among both the dead ring of other contacts site (3) except that fastening position.
2. lithium-ion-power cell special cap according to claim 1 is characterized in that: its periphery of described outer contact pin (22) upwards dig and with the peripheral position crimping of battery cap (1).
3. lithium-ion-power cell special cap according to claim 1 is characterized in that: the cap (221) of described outer contact pin (22) is provided with the intaglio bar that can be torn.
4. lithium-ion-power cell special cap according to claim 1 is characterized in that: described battery cap (1) is provided with exhaust hole.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2008200323188U CN201194236Y (en) | 2008-02-25 | 2008-02-25 | Special cover for lithium ion electrokinetic cell |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CNU2008200323188U CN201194236Y (en) | 2008-02-25 | 2008-02-25 | Special cover for lithium ion electrokinetic cell |
Publications (1)
Publication Number | Publication Date |
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CN201194236Y true CN201194236Y (en) | 2009-02-11 |
Family
ID=40393768
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CNU2008200323188U Expired - Lifetime CN201194236Y (en) | 2008-02-25 | 2008-02-25 | Special cover for lithium ion electrokinetic cell |
Country Status (1)
Country | Link |
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CN (1) | CN201194236Y (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101232089B (en) * | 2008-02-25 | 2010-12-22 | 江苏伊思达电池有限公司 | Special protecting cap of lithium ion power cell |
WO2019165677A1 (en) * | 2018-03-01 | 2019-09-06 | 宁德时代新能源科技股份有限公司 | Secondary battery and automobile |
-
2008
- 2008-02-25 CN CNU2008200323188U patent/CN201194236Y/en not_active Expired - Lifetime
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN101232089B (en) * | 2008-02-25 | 2010-12-22 | 江苏伊思达电池有限公司 | Special protecting cap of lithium ion power cell |
WO2019165677A1 (en) * | 2018-03-01 | 2019-09-06 | 宁德时代新能源科技股份有限公司 | Secondary battery and automobile |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
C14 | Grant of patent or utility model | ||
GR01 | Patent grant | ||
AV01 | Patent right actively abandoned |
Granted publication date: 20090211 Effective date of abandoning: 20080225 |
|
AV01 | Patent right actively abandoned |
Granted publication date: 20090211 Effective date of abandoning: 20080225 |