CN104425786A - Battery explosion-proof structure and battery comprising battery explosion-proof structure - Google Patents
Battery explosion-proof structure and battery comprising battery explosion-proof structure Download PDFInfo
- Publication number
- CN104425786A CN104425786A CN201310388385.9A CN201310388385A CN104425786A CN 104425786 A CN104425786 A CN 104425786A CN 201310388385 A CN201310388385 A CN 201310388385A CN 104425786 A CN104425786 A CN 104425786A
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- China
- Prior art keywords
- explosion
- battery
- clamp nut
- pressure disc
- rupture pressure
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/383—Flame arresting or ignition-preventing means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/05—Accumulators with non-aqueous electrolyte
- H01M10/052—Li-accumulators
- H01M10/0525—Rocking-chair batteries, i.e. batteries with lithium insertion or intercalation in both electrodes; Lithium-ion batteries
-
- 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 invention provides a battery explosion-proof structure and a battery comprising the battery explosion-proof structure. The battery explosion-proof structure comprises a battery shell cover, a gland nut, an explosion-proof needle and an explosion-proof membrane, wherein the battery shell cover is provided with a countersink; the countersink is provided with a step face; the explosion-proof membrane and the gland nut are sequentially arranged on the step face; the explosion-proof needle is fixedly connected with the center of the top face of the gland nut and points to the explosion-proof membrane; at least one vent hole is formed in the top face of the gland nut; the explosion-proof needle is provided with at least three needle points; the tips of the needle points are located in one plane and can define a certain area; and the plane is parallel to a plane of the explosion-proof membrane. The battery comprises a battery shell and the battery explosion-proof structure. The battery explosion-proof structure is simple in structure and convenient to mount; the production efficiency is improved and the assembling error generated in a mounting process is also reduced; and the accuracy of pressure-releasing starting pressure is improved and the explosion-proof safety reliability is enhanced.
Description
Technical field
The present invention be more particularly directed to a kind of battery anti-explosion structure and comprise its battery.
Background technology
The advantages such as it is high that lithium ion battery has operating voltage, and specific energy is high, serviceability temperature wide ranges, the extensive use in recent years in electric tool, for meeting electric tool high power requirements in motion, battery volume does larger and larger.For this reason, when battery in use there is short circuit, overcharge, cross the abnormal conditions such as to put time, inside battery will produce a large amount of gas, cause cell internal pressure sharply to increase, and cause the danger that the distortion of battery container is even blasted.
The electrokinetic cell applied now, particularly moulds shell electrokinetic cell, the explosion-protection equipment adopted with spring structure more.These type of explosion-proof valve parts are relatively many, and assembling process is relatively complicated, and the comparatively big error will produced in assembling process, affects the sealing effectiveness of battery, cause battery leakage, produce potential safety hazard in use procedure; Spring is in compressive state for a long time, exceed its elastic limits, spring cannot return to original state, the inefficacy of spring and rigging error also can affect the explosion-proof performance of explosion-proof valve, accurately can not control the starting pressure of pressure release, when battery generation abnormal conditions can not exit pressure release immediately, battery explosion can be caused.
In addition, some electrokinetic cells adopt the explosion-protection equipment with explosion-proof pin, the head of some explosion-proof pin is equipped with the acicular texture of taper needle point, due to this explosion-proof pin head and rupture pressure disc contact area less, this explosion-proof pin head is sharper, may accidentally injure rupture pressure disc under the operate miss in assembling process or the effect of external factor; When battery occurs abnormal, rupture pressure disc punctures in process, due to this explosion-proof pin head and rupture pressure disc contact area less, puncture area less, be unfavorable for the discharge of inside battery gas, thus also can affect the fail safe of battery.
Summary of the invention
It is less and cause the defects such as poor stability that the technical problem to be solved in the present invention is that explosion-proof pin in prior art easily accidentally injures rupture pressure disc in assembling process in order to overcome, explosion-proof pin punctures rupture pressure disc area, provides a kind of battery anti-explosion structure and comprise its battery.
The present invention solves above-mentioned technical problem by following technical proposals:
A kind of battery anti-explosion structure, it comprises a battery case cap, one clamp nut, one explosion-proof pin, with a rupture pressure disc, described battery case cap is provided with a counterbore, described counterbore has a step surface, described rupture pressure disc and clamp nut are successively set on described step surface, described explosion-proof pin is fixed in the center of the end face of clamp nut and points to described rupture pressure disc, the end face of described clamp nut is provided with at least one air vent hole, its feature is, described explosion-proof pin has at least three needle points, the tip of described needle point is positioned at a plane, and certain area can be surrounded, the plane parallel at described plane and rupture pressure disc place.
Preferably, the fringe region of described rupture pressure disc is thicker than the middle section of described rupture pressure disc.Long-term and the sealing ring close contact of the rupture pressure disc that thickness can be avoided so homogeneous and aging breakage.
Preferably, the middle section of the bottom surface of described rupture pressure disc forms a lower concave portion, and the inner edge of described step surface upwards forms a spacing ring, and edge and the described spacing ring of described lower concave portion lean.So both can strengthen sealing further, again can very firmly by spacing for rupture pressure disc on step surface, be conducive to assembling.
Preferably, described battery anti-explosion structure also comprises a sealing ring, and described sealing ring is located between described rupture pressure disc and described clamp nut.Like this, the end face of rupture pressure disc and sealing ring linear sealing, the bottom surface of rupture pressure disc and step surface seal, guarantee sealing reliability, and the entirety of rupture pressure disc is stressed more even, arranging sealing ring can also avoid clamp nut to be directly pressed on rupture pressure disc, thus the possibility preventing clamp nut from occurring to rub with rupture pressure disc in screwing operations and rupture pressure disc is damaged.
Preferably, the central authorities of the end face of described clamp nut have a through hole, and described explosion-proof pin is located in described through hole, and affixed with described clamp nut.
Preferably, the material of described clamp nut is resin, and described explosion-proof pin is connected with described clamp nut injection moulding.
Preferably, the material of described clamp nut is metal, and described explosion-proof pin and described clamp nut are welded to connect.
Preferably, the middle section of the end face of described rupture pressure disc forms depressed part on.
Preferably, the thickness of the middle section of described rupture pressure disc is 0.05 ~ 0.25 millimeter.
Preferably, the end face of described clamp nut is equipped with some fixing holes, for screwing or unscrew described clamp nut.
Preferably, the quantity of described needle point is four.
Preferably, the area that the tip of described needle point surrounds is 1 ~ 6 square millimeter.Like this, when abnormal conditions appear in battery, inside battery air pressure increases rapidly, rupture pressure disc is upwards heaved, and when air pressure reaches setting starting pressure (0.25-0.3MPa), four needle points of explosion-proof pin contact with rupture pressure disc simultaneously, puncture rupture pressure disc simultaneously, thus rupture pressure disc by promptly formed area larger puncture mouth, the gas of inside battery is discharged rapidly from the steam vent clamp nut, prevents battery explosion.
Preferably, tip to the distance of described rupture pressure disc of described needle point is 1.5 ~ 6 millimeters.
The present invention also provides a kind of battery, and it comprises a battery container, and its feature is, described battery also comprises above-mentioned battery anti-explosion structure.
Positive progressive effect of the present invention is: battery anti-explosion structure of the present invention and to comprise its battery structure simple, be convenient to install, while enhancing productivity, also reduce the rigging error produced in installation process, improve the accuracy of pressure release starting pressure, strengthen anti-explosion safety reliability.
Accompanying drawing explanation
Fig. 1 is the cutaway view of the battery anti-explosion structure of present pre-ferred embodiments.
Fig. 2 is the cutaway view of the rupture pressure disc of present pre-ferred embodiments.
Fig. 3 is the schematic perspective view of the explosion-proof pin of present pre-ferred embodiments.
Fig. 4 is the exploded perspective view of the battery anti-explosion structure of present pre-ferred embodiments.
Embodiment
Lift preferred embodiment below, and come by reference to the accompanying drawings clearlyer intactly the present invention to be described.
As Figure 1-4, battery anti-explosion structure of the present invention comprises battery case cap 1, clamp nut 2, explosion-proof pin 3 and rupture pressure disc 4.Battery case cap 1 is provided with a counterbore, and counterbore has step surface 11, and rupture pressure disc 4 and clamp nut 2 are successively set on step surface 11.The inwall of counterbore is provided with the internal thread 12 coordinated with clamp nut 2, and clamp nut 2 is fixedly connected with the internal thread 12 on counterbore inwall by external screw thread.The end face of clamp nut 2 is provided with four steam vents 21, for Exhaust Gas when breaking through rupture pressure disc 4 at electric pool gas.Certainly, the number of exhaust outlet, without the need to being confined to four, as long as have one with upper air-vent, can allow gas discharge.
Explosion-proof pin 3 is fixed in the center of the end face of clamp nut 2 and points to rupture pressure disc 4, and explosion-proof pin 3 has four needle points 31, and the tip of all needle points 31 is positioned at a plane, and the plane parallel at this plane and rupture pressure disc 4 place.When there are abnormal conditions in battery, inside battery air pressure increases rapidly, rupture pressure disc 4 is upwards heaved, when air pressure reaches setting starting pressure (0.25-0.3MPa), four needle points 31 of explosion-proof pin 3 contact with rupture pressure disc 4 simultaneously, puncture rupture pressure disc 4 simultaneously, thus rupture pressure disc 4 by promptly formed area larger puncture mouth, the gas of inside battery is discharged rapidly from the steam vent 21 clamp nut 2, prevents battery explosion.Adopt four needle points 31 can avoid the explosion-proof pin of pyramidal structure in the process punctured, only generate a very little hole, gas when the urgency discharge do not come, the dangerous consequences of battery with regard to having blasted.Certainly, it will be appreciated by those skilled in the art that and select four needle points 31 to be one preferably scheme herein, also can adopt the needle point of other numbers, such as three or five, as long as those needle points can surround certain area.
The central authorities of the end face of clamp nut 2 have a through hole 22, and explosion-proof pin 3 is located in through hole 22, and with clamp nut 2 by injection moulding or the mode of welding affixed, form integrative-structure.Explosion-proof pin 3 designs with the integral structure of clamp nut 2, makes the height of explosion-proof pin 3 lower than clamp nut 2 base plane, avoids the situation of accidentally injuring rupture pressure disc in assembling process and occurs.When the material of clamp nut 2 is resin, explosion-proof pin 3 is connected with clamp nut 2 injection moulding.When the material of clamp nut 2 is metal, explosion-proof pin 3 and clamp nut 2 are welded to connect.
This battery anti-explosion structure also comprises a sealing ring 5, and sealing ring 5 is located between rupture pressure disc 4 and clamp nut 2.Sealing ring 5 is metal material.The end face of rupture pressure disc 4 and sealing ring 5 linear sealing, bottom surface and the step surface 11 of rupture pressure disc 4 seal, and guarantee sealing reliability, and the entirety of rupture pressure disc 4 are stressed more even.Arranging sealing ring 5 can also avoid clamp nut 2 to be directly pressed on rupture pressure disc 4, thus the possibility preventing clamp nut 2 from occurring to rub with rupture pressure disc 4 in screwing operations and rupture pressure disc 4 is damaged.
The fringe region of rupture pressure disc 4 is thicker than middle section.Concrete implementation can have several, such as form a lower concave portion at the middle section of the bottom surface of rupture pressure disc 4, or form depressed part at the middle section of the end face of rupture pressure disc 4, as in this embodiment, depressed part 42 both can also be set, also lower concave portion 41 is set.This kind of design avoids long-term and sealing ring 5 close contact of the homogeneous rupture pressure disc of thickness 4 and aging breakage.
The inner edge of step surface 11 upwards forms a spacing ring 13, and edge and the spacing ring 13 of the lower concave portion 41 of rupture pressure disc 4 lean.Like this, on the one hand can strengthen sealing further, on the other hand then can very firmly by spacing for rupture pressure disc 4 on step surface 11, be conducive to assembling.
In the present embodiment, battery case cap 1 is polypropylene material, and explosion-proof pin 3 is 4 millimeters with the vertical range of rupture pressure disc 4; Explosion-proof pin 3 material is 316 steel, and the area that the tip of four needle points 31 of explosion-proof pin 3 surrounds is 4 square millimeters; The material of rupture pressure disc 4 is ethylene propylene diene rubber, and the thickness of its middle section is 0.15 millimeter; Clamp nut 2 is polypropylene material, and explosion-proof pin 3 injection moulding is on clamp nut 2.The starting pressure of pressure release setting can adjust according to the change of explosion-proof pin 3 to the area of the tip encirclement of the thickness of middle section of the vertical range of rupture pressure disc 4, rupture pressure disc 4 and the needle point 31 of explosion-proof pin 3.Wherein, explosion-proof pin 3 can be 1.5 ~ 6 millimeters to the vertical range of rupture pressure disc 4, and the thickness of the middle section of rupture pressure disc 4 can be 0.05 ~ 0.25 millimeter, and the area that the tip of the needle point 31 of explosion-proof pin 3 surrounds can be 1 ~ 6 square millimeter.
In addition, the end face of clamp nut 2 is also equipped with some fixing holes 23, for screwing or unscrew clamp nut 2.
Although the foregoing describe the specific embodiment of the present invention, it will be understood by those of skill in the art that this only illustrates, protection scope of the present invention is defined by the appended claims.Those skilled in the art, under the prerequisite not deviating from principle of the present invention and essence, can make various changes or modifications to these execution modes, but these change and amendment all falls into protection scope of the present invention.
Claims (14)
1. a battery anti-explosion structure, it comprises a battery case cap, one clamp nut, one explosion-proof pin, with a rupture pressure disc, described battery case cap is provided with a counterbore, described counterbore has a step surface, described rupture pressure disc and clamp nut are successively set on described step surface, described explosion-proof pin is fixed in the center of the end face of clamp nut and points to described rupture pressure disc, the end face of described clamp nut is provided with at least one air vent hole, it is characterized in that, described explosion-proof pin has at least three needle points, the tip of described needle point is positioned at a plane, and certain area can be surrounded, the plane parallel at described plane and rupture pressure disc place.
2. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the fringe region of described rupture pressure disc is thicker than the middle section of described rupture pressure disc.
3. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the middle section of the bottom surface of described rupture pressure disc forms a lower concave portion, and the inner edge of described step surface upwards forms a spacing ring, and edge and the described spacing ring of described lower concave portion lean.
4. battery anti-explosion structure as claimed in claim 1, it is characterized in that, described battery anti-explosion structure also comprises a sealing ring, and described sealing ring is located between described rupture pressure disc and described clamp nut.
5. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the central authorities of the end face of described clamp nut have a through hole, and described explosion-proof pin is located in described through hole, and affixed with described clamp nut.
6. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the material of described clamp nut is resin, and described explosion-proof pin is connected with described clamp nut injection moulding.
7. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the material of described clamp nut is metal, and described explosion-proof pin and described clamp nut are welded to connect.
8. battery anti-explosion structure as claimed in claim 1, is characterized in that, the middle section of the end face of described rupture pressure disc forms depressed part on.
9. battery anti-explosion structure as claimed in claim 1, it is characterized in that, the thickness of the middle section of described rupture pressure disc is 0.05 ~ 0.25 millimeter.
10. battery anti-explosion structure as claimed in claim 1, is characterized in that, the end face of described clamp nut is equipped with some fixing holes, for screwing or unscrew described clamp nut.
11. battery anti-explosion structures as claimed in claim 1, is characterized in that, the quantity of described needle point is four.
12. battery anti-explosion structures as claimed in claim 1, is characterized in that, the area that the tip of described needle point surrounds is 1 ~ 6 square millimeter.
13., as the battery anti-explosion structure in claim 1-12 as described in any one, is characterized in that, the tip of described needle point is 1.5 ~ 6 millimeters to the distance of described rupture pressure disc.
14. 1 kinds of batteries, it comprises a battery container, it is characterized in that, described battery also comprises as the battery anti-explosion structure in claim 1-13 as described in any one.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310388385.9A CN104425786B (en) | 2013-08-29 | 2013-08-29 | Battery anti-explosion structure and the battery including which |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310388385.9A CN104425786B (en) | 2013-08-29 | 2013-08-29 | Battery anti-explosion structure and the battery including which |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN104425786A true CN104425786A (en) | 2015-03-18 |
| CN104425786B CN104425786B (en) | 2017-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201310388385.9A Expired - Fee Related CN104425786B (en) | 2013-08-29 | 2013-08-29 | Battery anti-explosion structure and the battery including which |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108598333A (en) * | 2018-04-12 | 2018-09-28 | 珠海中能科技有限公司 | Explosion-proof valve and battery system |
| US11047508B2 (en) | 2017-03-30 | 2021-06-29 | Donaldson Company, Inc. | Vent with relief valve |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01158656U (en) * | 1988-04-22 | 1989-11-01 | ||
| CN201590443U (en) * | 2009-12-08 | 2010-09-22 | 珠海锂源动力投资有限公司 | Explosion-protection valve for lithium-ion storage battery |
| CN203445174U (en) * | 2013-08-29 | 2014-02-19 | 天津中聚新能源科技有限公司 | Battery anti-explosion structure and battery comprising same |
-
2013
- 2013-08-29 CN CN201310388385.9A patent/CN104425786B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01158656U (en) * | 1988-04-22 | 1989-11-01 | ||
| CN201590443U (en) * | 2009-12-08 | 2010-09-22 | 珠海锂源动力投资有限公司 | Explosion-protection valve for lithium-ion storage battery |
| CN203445174U (en) * | 2013-08-29 | 2014-02-19 | 天津中聚新能源科技有限公司 | Battery anti-explosion structure and battery comprising same |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US11047508B2 (en) | 2017-03-30 | 2021-06-29 | Donaldson Company, Inc. | Vent with relief valve |
| US11692644B2 (en) | 2017-03-30 | 2023-07-04 | Donaldson Company, Inc. | Vent with relief valve |
| CN108598333A (en) * | 2018-04-12 | 2018-09-28 | 珠海中能科技有限公司 | Explosion-proof valve and battery system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN104425786B (en) | 2017-03-29 |
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Effective date of registration: 20200115 Address after: 300480 No. 20 North Mount Huangshan Road, Tianjin Binhai New Area, Hangu, China Patentee after: Sinopoly Battery Ltd. Address before: 300450 No. 20 North Mount Huangshan Road, Tianjin Binhai New Area, Hangu, China Patentee before: TIANJIN SINOPOLY NEW ENERGY TECHNOLOGY CO., LTD. |
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| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170329 Termination date: 20200829 |