CN205104558U - Battery safety short -circuiting device and secondary cell - Google Patents
Battery safety short -circuiting device and secondary cell Download PDFInfo
- Publication number
- CN205104558U CN205104558U CN201520726926.9U CN201520726926U CN205104558U CN 205104558 U CN205104558 U CN 205104558U CN 201520726926 U CN201520726926 U CN 201520726926U CN 205104558 U CN205104558 U CN 205104558U
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- conducting strip
- bounce
- back valve
- pole
- circuiting means
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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 provides a battery safety short -circuiting device and secondary cell, includes: battery end cover is including battery apron (1), first ploe post (2) and second ploe post (3), its characterized in that still includes short circuit conducting strip (7), bounce -back valve (8) and safety cover (13), wherein, the bounce -back valve (8) set up in apron (1), first ploe post (2) and apron (1) is electrically conductive to be connected, second ploe post (3) with apron (1) is insulating to be connected, conducting strip (7) are connected and are connected with second ploe post (3) is electrically conductive with apron (1) is insulating, conducting strip (7) and bounce -back valve (8) have certain clearance and by safety cover (13) cover, when battery internal pressure reached set pressure, bounce -back valve (8) contacted to the bounce -back of conducting strip (7) orientation and with conducting strip (7), forms the outside short circuit of battery self.
Description
Technical field
The invention belongs to secondary cell field, particularly relate to a kind of secondary cell safety from short-circuiting means.
Background technology
The energy and environment be the mankind enter 21 century must faced by two Tough questions, continually developing of new forms of energy and clean reproducible energy is the important foundation of human social.From 60 ~ seventies of 20th century, research has developed and is exceedingly fast since starting lithium secondary battery, this is because it just in time meets mobile communication and notebook computer develop the requirements such as, memory-less effect low to power supply miniaturization, lightweight, long operating time, long circulation life, self-discharge rate and environmental sound rapidly.
Along with the development of modern society and the enhancing of people's environmental consciousness, the chargeable secondary cell of increasing equipment choice is as power supply, as mobile phone, notebook computer, electric tool box electric automobile etc., this is that the application and development of chargeable secondary cell provides wide space.Electric automobile and energy-accumulating power station etc. generally need use to have jumbo electrokinetic cell as power supply.These electrokinetic cells, except having high power capacity, also should have good fail safe and longer cycle life etc., just can reach the standard of use and meet the demand of people.
Current secondary cell mainly relies on relief valve to improve fail safe, and when cell internal pressure is increased to a certain degree, relief valve is opened, and gas out prevents battery explosion from relief valve.But relief valve can not ensure safety completely, electrolyte ejection may be had when it is opened and cause and catch fire, thus potential safety hazard is caused to surrounding environment.Therefore, if can install a protective device on the secondary battery, when secondary cell internal pressure can be made too high, battery is discharged from short circuit by outside, plays pre-blastproof effect, improves the reliability of battery further.
Summary of the invention
The object of the invention is to: a kind of safe short valve of secondary cell with automatic external short circuit structure is provided, it can when secondary cell internal pressure be too high, carry out external short circuit in time, play the effective effect preventing battery explosion, improve the reliability of battery product, be of great practical significance.
Specifically, the invention provides a kind of secondary cell, comprising: end cover for battery cells, comprise battery cover board, relief valve, liquid injection hole, be positioned at the first outside pole and the second pole and be fixed to the insulating trip of described terminal, electrode body, comprises positive polar body and negative electrode, battery container, described housing has opening, can hold described electrode body and electrolyte, insulation film, is used for wrapping up electrode body, itself and battery container is insulated, fluid injection bolt: be used for closed liquid injection hole, it is characterized in that, also comprise: a cell safety short-circuiting means, comprise short circuit conducting strip, bounce-back valve and protective cover, wherein, described liquid injection hole, relief valve and bounce-back valve are all arranged at described cover plate, described first pole is connected with described cover plate conduction, described second pole insulate with described cover plate and is connected, described conducting strip and cover plate insulate to be connected and to conduct electricity with the second pole and are connected, described conducting strip and bounce-back valve have certain interval and by protective cover cover, when cell internal pressure reaches setting pressure, bounce-back valve rebounds to conducting strip direction and contacts with conducting strip, form the external short circuit of battery self.
Further, wherein said conducting strip is zigzag structure, is formed in one.
Further, wherein said conducting strip is zigzag structure, for multiple sheet metal is connected to form.
Further, between wherein said multiple sheet metal, can position adjustments be carried out, thus the distance bottom conducting strip end and bounce-back valve can be adjusted.
Further, wherein said bounce-back valve upper end can be positioned at above or below described cover plate, and connected mode is welding or riveted joint.
Further, wherein said conducting strip initiating terminal is connected with described second pole, and end is arranged on top bottom bounce-back valve but is not connected with bounce-back valve and surrounding.
Further, wherein said conducting strip is for comprising the first conducting strip, the second conducting strip, and the top of the first conducting strip free end forms a projection, and its underpart connects insulator; Second conducting strip is arranged on a distance above the first conducting strip.
Further, the valve that wherein rebounds is made up of metal material, and its diameter is 8 ~ 12mm, and the degree of depth is 1.0 ~ 2.0mm, thickness is 50 ~ 100 μm, and cross section is one section of circular arc.
Further, be an arc surface bottom the valve that wherein rebounds, its maximum gauge is 12mm, and the degree of depth is 1mm, thickness is 80 μm.
Further, wherein said metal material is aluminium, aluminium alloy, nickel or tin.
Beneficial effect of the present invention is: the present invention includes end cap, Positive Poles, negative pole pole, relief valve, liquid injection hole and safe short valve, and wherein Positive Poles is connected with end cap conduction, and negative pole pole insulate with end cap and is connected.Relief valve, liquid injection hole and safe short valve are all arranged at end cap, and safe short valve comprises short circuit conducting strip and bounce-back valve, and short circuit conducting strip insulate with end cap and is connected.Compare to avoid the too high fail safe of blasting of inner pressure of battery with only relying on relief valve, when cell internal pressure can be made to reach set point by installing a safe short valve on the secondary battery, before relief valve is opened, battery is discharged from short circuit by outside in time, play the effect of prevention battery explosion, improve the reliability of battery further.
Accompanying drawing explanation
Fig. 1 is battery exterior structure of the present invention.
Fig. 2 is battery cutaway view of the present invention
Fig. 3 is embodiment of the present invention one conducting strip structure figure
Fig. 4 is that the present invention rebounds the schematic diagram of installation site below cover plate of valve
Fig. 5 be the present invention rebound valve installation site on the cover board side schematic diagram
Fig. 6 is embodiment of the present invention one short-circuiting means partial view (before the bounce-back of bounce-back valve)
Fig. 7 is embodiment of the present invention one short-circuiting means partial view (after the bounce-back of bounce-back valve)
Fig. 8 is the conducting strip structure figure of embodiment of the present invention two
Fig. 9 is embodiment of the present invention two short-circuiting means partial view (before the bounce-back of bounce-back valve)
Figure 10 is embodiment of the present invention two short-circuiting means partial view (after the bounce-back of bounce-back valve)
Embodiment
Below in conjunction with embodiment and Figure of description, the present invention is described in further detail, but embodiments of the present invention are not limited thereto.
Wherein: 1-cover plate, 2-first pole, 3-second pole, 4-relief valve, 5-liquid injection hole, the safe short valve of 6-, 7-short circuit conducting strip, 8-bounce-back valve, 9-insulating trip, 10-arc surface, 11-first conducting strip, 12-second conducting strip, 13-safety valve protective cover, 14-nut, 15-sheet metal, 16-electrode body, 17-housing, 18-insulating case, 19-lug, 20-pole plate, 21-dielectric film.
Execution mode one:
As shown in Figure 1, 2, according to the rechargeable battery of the present embodiment, end cover for battery cells, it insulating trip 9 comprising battery cover board 1, relief valve 4, liquid injection hole 5, the first pole 2 being positioned at outside and the second pole 3 and be fixed to described terminal; And electrode body 16, comprise positive polar body and negative electrode; Battery container 17, described housing has opening, can hold described electrode body 16 and electrolyte; Insulation film 21, is used for wrapping up electrode body 16, itself and battery container 17 is insulated; Fluid injection bolt: be used for closed liquid injection hole 5.And short-circuiting means, wherein this short-circuiting means comprises short circuit conducting strip 7, bounce-back valve 8 and protective cover 13.Wherein the first pole 2 is connected with cover plate 1 conduction, and the second pole 3 insulate with cover plate 1 and is connected.Relief valve 4, liquid injection hole 5 and safe short valve 6 are all arranged on cover plate 1; safe short valve 6 comprises short circuit conducting strip 7 and bounce-back valve 8; short circuit conducting strip 7 insulate with cover plate 1 and is connected; safety valve 6 covers by safety valve protective cover 13, to protect that misoperation avoided by safety valve and short circuit or outside foreign material enter.
Shown in Fig. 2,3, bounce-back valve 8 is arranged on cover plate 1 by welding or riveting, and short circuit conducting strip 7 is arranged on the second pole 3, is separated in the middle of itself and cover plate 1 by insulating trip 9.Short circuit conducting strip 7 in Z-shaped, comprise connect successively upper slice 7a, brace 7b, bottom sheet 7c tri-parts, upper slice 7a is fixedly connected with the second pole 3, and bottom sheet 7c is suspended in the top of bounce-back valve 8, and preferably, bottom sheet 7c is relative with the geometric center of the valve 8 that rebounds.Go up a 7a in the present embodiment, brace 7b, bottom sheet 7c be bent to form by piece of metal sheet (preferably aluminium flake), in other scheme, also can by several connect adopt weld, rivet, be threaded, clamping formed.In the preferred scheme of another one, upper slice between 7a and brace 7b, and/or be flexible clamping between brace 7b and bottom sheet 7c, and clamping position adjustable, so just conveniently can adjust the distance between bottom sheet 7c and bounce-back valve 8, battery that is dissimilar, specification can be adapted to.
See Fig. 4,5, show the concrete structure of bounce-back valve 8, it is similar to a circular cap minor structure, it is installed on cover plate 1, installation site can on cover plate 1, also can below cover plate 1, be a downward arc surface 10 bottom it, can deform under pressure and on counter steer.Certain bounce-back valve 8 differs and is decided to be cap sequence, as long as have an arc surface 10 that can rebound and the support portion for fixing this arc surface 10.
In the present embodiment, this arc surface 10 and support portion are that metal material is integrally formed, and such processing cost is lower, but require higher for the dimensional characteristic of material, and bottom circular diameter is little, is not easy bounce-back, there will be cell pressure large time can not normally short circuit.Bottom circular diameter is larger, and the bounce-back valve degree of depth is less, rebounds easier, but if the bounce-back valve degree of depth is too small, then bounce-back valve can be caused can not to contact with conducting strip or can not contact completely, do not reach the effect making battery short circuit.Find through experimental study, bottom bounce-back valve, the diameter of arc surface 10 is 8/10/12mm, simultaneously its degree of depth be 1.0,1.5,2.0mm, thickness is when being 50 ~ 100 μm, effect is better, now, can ensure when battery short circuit, bounce-back valve normally can rebound and can ensure to contact completely with conducting strip.In optimal case, the diameter of bounce-back valve circle cambered surface is 12mm, degree of depth 1mm, thickness 70um.
With reference to the accompanying drawings 6,7, the course of work of the present invention program is described, as described in Figure 6, in normal state, the bottom arc surface 10 of bounce-back valve 8 is in below cover plate 1, even if secondary internal pressure increases, as long as within rated value, can not there is action in bounce-back valve 8, be namely in off state between the first pole 2 and the second pole 3.And when secondary cell is in abnormal operating state, when internal pressure exceedes set point, under internal pressure effect, the bottom arc surface 10 of metal bounce-back valve 8 rebounds, arc surface 10 is caused to project upwards, and contact with short circuit conducting strip 7, and then make the first pole 2 (as described in Figure 7), cover plate 1, bounce-back valve 8, conducting strip 7, second pole 3 conducts electricity connection each other, occur outside from short circuit, avoid the technology heating of inside battery, thus ensure that the electricity of inside battery is released in time, play the effect of prevention battery explosion, the reliability of further raising battery.
Execution mode two:
See accompanying drawing 8-10, show structure and the course of work of embodiments of the present invention two, it is identical with the basic structure of embodiment 1, the main distinction is the structure of conducting strip 7, it comprises two panels conducting strip 11, 12, wherein the first conducting strip 11 arranges a projection in its lower end, projection can be insulator also can be electric conductor, as long as quality is not too large, rebound effect can not be affected, but intensity can not be adopted low, the material that elasticity is large, the first conducting strip 11 dynamics that rebounds can be caused little, preferred electric conductor is aluminium, aluminium alloy etc., insulator is PP etc.Two conducting strips are all enclosed within pole, but have space between the first conducting strip 11 and pole and insulate with pole, preferably, can arrange insulating material at the position that the first conducting strip 11 is adjacent with pole.First conducting strip contacts with end cap.Second conducting strip 12 conducts electricity with pole and is connected.The top of the free end of the first conducting strip 11 has one upwardly, and it can be that conducting strip is bent to form, also can is that punching press is formed or other mechanical connection manners are formed, and then another conducting strip 12 is arranged on a distance above the first conducting strip.Bounce-back valve 8 is arranged on the below (see Fig. 9) of the first conducting strip 11.In normal state, the bottom arc surface 10 of bounce-back valve 8 is in below cover plate 1, even if secondary internal pressure increases, as long as within rated value, bounce-back valve 8 action can not occur, and is namely in off state between the first pole 2 and the second pole 3.And when secondary cell is in abnormal operating state, when internal pressure exceedes set point, under internal pressure effect, the bottom arc surface 10 of metal bounce-back valve 8 rebounds, arc surface 10 is caused to project upwards, and contact with the first conducting strip 11, (as shown in Figure 10), and promote the first conducting strip 11 action jut is contacted with the second conducting strip, make the first pole 2, cover plate 1 like this, the valve 8 that rebounds, conducting strip 7, second pole 3 conduct electricity connection each other, occur outside from short circuit, avoid the technology heating of inside battery.
The above is only the preferred embodiment of the present invention; it should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.In addition, although employ some specific terms in this specification, these terms are only used to convenient explanation, do not form any restriction to the present invention.
Claims (10)
1. a cell safety short-circuiting means, comprising:
End cover for battery cells, comprises battery cover board (1), the first pole (2) and the second pole (3);
It is characterized in that, also comprise short circuit conducting strip (7), bounce-back valve (8) and protective cover (13), wherein, described bounce-back valve (8) is arranged at described cover plate (1), described first pole (2) is connected with described cover plate (1) conduction, described second pole (3) is insulated with described cover plate (1) and is connected, described conducting strip (7) and cover plate (1) insulate to be connected and to conduct electricity with the second pole (3) and are connected, described conducting strip (7) and bounce-back valve (8) have certain interval and are covered by protective cover (13), when cell internal pressure reaches setting pressure, bounce-back valve (8) rebounds to conducting strip (7) direction and contacts with conducting strip (7), form the external short circuit of battery self.
2. cell safety short-circuiting means according to claim 1, is characterized in that: described conducting strip (7) is zigzag structure, is formed in one.
3. cell safety short-circuiting means according to claim 1, is characterized in that: described conducting strip (7) is zigzag structure, for multiple sheet metal is connected to form.
4. cell safety short-circuiting means according to claim 3, is characterized in that: can carry out position adjustments between described multiple sheet metal, thus can adjust the distance bottom conducting strip end and bounce-back valve.
5. cell safety short-circuiting means according to claim 1, is characterized in that: described bounce-back valve upper end can be positioned at above or below described cover plate, and connected mode is welding or riveted joint.
6. cell safety short-circuiting means according to claim 1, is characterized in that: described conducting strip initiating terminal is connected with described second pole (3), and end is arranged on top, bounce-back valve (8) bottom but not with bounce-back valve and be around connected.
7. cell safety short-circuiting means according to claim 1, it is characterized in that: described conducting strip is for comprising the first conducting strip (11), the second conducting strip (12), the top of the first conducting strip (11) free end forms a projection, and its underpart arranges a projection; Second conducting strip is arranged on a distance above the first conducting strip.
8. the cell safety short-circuiting means according to any one of claim 1-7, is characterized in that: bounce-back valve is made up of metal material, and its diameter is 8 ~ 12mm, and the degree of depth is 1.0 ~ 2.0mm, thickness is 50 ~ 100 μm, and cross section is one section of circular arc.
9. cell safety short-circuiting means according to claim 8, is characterized in that: be an arc surface bottom bounce-back valve, its maximum gauge is 12mm, and the degree of depth is 1mm, thickness is 80 μm.
10. a secondary cell, is characterized in that, comprises the cell safety short-circuiting means described in any one of claim 1-9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520726926.9U CN205104558U (en) | 2015-09-18 | 2015-09-18 | Battery safety short -circuiting device and secondary cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520726926.9U CN205104558U (en) | 2015-09-18 | 2015-09-18 | Battery safety short -circuiting device and secondary cell |
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| Publication Number | Publication Date |
|---|---|
| CN205104558U true CN205104558U (en) | 2016-03-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520726926.9U Active CN205104558U (en) | 2015-09-18 | 2015-09-18 | Battery safety short -circuiting device and secondary cell |
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| Country | Link |
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| CN (1) | CN205104558U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN106129282A (en) * | 2016-08-21 | 2016-11-16 | 合肥国轩高科动力能源有限公司 | A kind of ternary lithium battery overcharge-prevention cover plate assembly |
| CN107565156A (en) * | 2017-09-13 | 2018-01-09 | 苏州绿标新能源科技有限公司 | A kind of lithium-ion-power cell with high safety performance |
| CN109564997A (en) * | 2016-08-01 | 2019-04-02 | 江森自控科技公司 | The additives for overcharge protection system of square lithium ion battery cell with neutral or non-conductive encapsulation |
-
2015
- 2015-09-18 CN CN201520726926.9U patent/CN205104558U/en active Active
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105958135A (en) * | 2016-06-20 | 2016-09-21 | 宁德时代新能源科技股份有限公司 | Secondary battery |
| CN109564997A (en) * | 2016-08-01 | 2019-04-02 | 江森自控科技公司 | The additives for overcharge protection system of square lithium ion battery cell with neutral or non-conductive encapsulation |
| US11355823B2 (en) | 2016-08-01 | 2022-06-07 | Cps Technology Holdings Llc | Overcharge protection systems for prismatic lithium ion battery cells having neutral or non-conductive packaging |
| CN106129282A (en) * | 2016-08-21 | 2016-11-16 | 合肥国轩高科动力能源有限公司 | A kind of ternary lithium battery overcharge-prevention cover plate assembly |
| CN106129282B (en) * | 2016-08-21 | 2018-07-17 | 合肥国轩高科动力能源有限公司 | A kind of ternary lithium battery overcharge-prevention cover plate assembly |
| CN107565156A (en) * | 2017-09-13 | 2018-01-09 | 苏州绿标新能源科技有限公司 | A kind of lithium-ion-power cell with high safety performance |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20191030 Address after: 100015 M4 Floor, No. 1 Jiuxianqiao East Road, Chaoyang District, Beijing Patentee after: Beijing North China new energy lithium battery equipment Technology Co. Ltd. Address before: 100015 5th floor, South Gate, M5 building, No.1, Jiuxianqiao East Road, Chaoyang District, Beijing Patentee before: Beijing Flight Boda Electronics Ltd. |
|
| TR01 | Transfer of patent right |