CN202363526U - Early warning type anti-explosion plug for lithium battery - Google Patents
Early warning type anti-explosion plug for lithium battery Download PDFInfo
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- CN202363526U CN202363526U CN2011204841385U CN201120484138U CN202363526U CN 202363526 U CN202363526 U CN 202363526U CN 2011204841385 U CN2011204841385 U CN 2011204841385U CN 201120484138 U CN201120484138 U CN 201120484138U CN 202363526 U CN202363526 U CN 202363526U
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- early warning
- explosion
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- plug
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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
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Abstract
The utility model relates to an early warning type anti-explosion plug for a lithium battery. The utility model aims to solve the problem that early warning cannot be realized in the prior art to result in battery firing or explosion. According to the technical scheme, the early warning type anti-explosion plug for the lithium battery is monitored by a battery early warning system, is matched with a liquid injection hole in a battery cover plate, and comprises a sealing plug, a sealing gasket and an anti-explosion sheet, wherein the sealing gasket is padded at the bottom of the liquid injection hole; the sealing gasket, the anti-explosion sheet and the sealing plug are fixed into a whole body from bottom to top; a through hole is formed at the middle part of the sealing gasket; the anti-explosion sheet consists of a horizontal anti-explosion sheet ring and an early warning anti-explosion pit which is sunk in the middle of the anti-explosion sheet; and the shape of the early warning anti-explosion pit is monitored by the battery early warning system. When pressed to a certain extent, the early warning type anti-explosion plug for the lithium battery performs early warning, alarming and pressure releasing measures, wherein the early warning pressure value and the alarm pressure value are reasonably set.
Description
Technical field
The utility model relates to a kind of battery and uses explosion-proof plug, and particularly a kind of lithium battery is used the early warning type explosion-proof plug.
Background technology
At present, various batteries, particularly lithium battery have had on market widely to be used, but owing to the overcharging of battery, cross and put or reason such as internal short-circuit causes battery operated electric current excessive; Thereby make the temperature of battery too high, produce the gas of HTHP, make the pressure and temperature of inside battery all very high; When the pressure and temperature in the battery surpassed the ability to bear of battery packages container, packing container was blown, the flammable and explosive substance outflow of the inside; Thereby serious accident such as set off an explosion, on fire; So, particularly all need be provided with special explosion-proof plug on the lithium battery on the battery, prevent battery explosion.At present the structure of explosion-proof plug is mainly formed by the mode that rupture pressure disc constitutes pressure releasing chamber; General situation adopts the membrane structure form; Following several kinds of structures are arranged: one, comprise matrix and be arranged on the conductive electrode on the matrix; Described matrix surface is provided with stepped hole, is provided with rupture pressure disc and briquetting in the stepped hole, described briquetting be pressed in rupture pressure disc top and with stepped hole inner wall sealing tight fit; Two, comprise matrix and conductive electrode provided thereon, also be provided with stepped hole at matrix surface, rupture pressure disc places in the stepped hole, the briquetting of center drilling be pressed in rupture pressure disc top and and stepped hole inner wall sealing close-fitting fix, constitute inserted blast resistance construction; Three, comprise matrix and safety vent provided thereon; In safety vent, be provided with rupture pressure disc; This rupture pressure disc and matrix are integral type press-stretched molding structure, and rupture pressure disc is positioned at safety vent certain depth place, and promptly all there is difference in height on the upper and lower surface of rupture pressure disc apart from the upper and lower surface of matrix respectively; On the surface of this rupture pressure disc, also be provided with a circle groove at least, constitute explosion-proof fracture circle near the inwall place of safety vent; Or adopt the impression tactic pattern, and the impression structure is that the top cover that has the structure that ftracture is attached on the housing, during the ability to bear of the thin part below the pressure of inside battery surpasses the cracking groove, whole cracking groove will be blown.What but no matter it was taked is the impression structure or the technical characterictic of membrane structure, and the purpose that finally need reach of all explosion-proof plugs all is at present, in case cell internal pressure is excessive; Then break through rupture pressure disc immediately; With gas venting in the battery, reduce cell internal pressure, accomplish explosion-proof work.But; This class formation can only release pressure, at this class formation since protection need be destroyed open after, the flammable and explosive substance of inside battery just is exposed in the air; And owing to there is not the existence of warning; So battery also might continue to discharge and recharge and be heated, and further gushes out the flammable and explosive substance of inside battery, cause on fire or blast.
Correlation technique one: Chinese patent notification number CN201266631U, July 1 2009 day for announcing, a kind of flame proection of chargeable battery was disclosed, comprising: hollow valve body is electrically connected with battery battery core formation through following pressure release outage assembly; Be located at the pressure release outage assembly that is electrically connected between valve body and the battery battery core that can be with inside battery cuts off with atmosphere time the in the valve body, pressure release outage assembly comprises: one with the valve body affixed needle that insulate; One end and valve body form and are electrically connected, and the other end electrically contacts with needle or separates simultaneously inside battery and atmospheric isolation or the movable spool that is communicated with; One applies the elastic parts with cell internal pressure active force in the opposite direction to spool.Such structure can play the effect of early warning, but structure is comparatively complicated, and equipment cost is higher, is not suitable for most of battery apparatus.
Correlation technique two: Chinese patent notification number CN101645496A, February 10 2010 day for announcing, a kind of burst disk that is used for the power battery explosion protection structure was disclosed, said explosion-proof impression is processed to form on said burst disk.More precisely described impression is the impression that is processed in the burst disk middle part.This correlation technique, on the function with technical scheme on traditional impression structural similarity, all lack the forewarning function of complete function.
Summary of the invention
The purpose of the utility model is to solve has only the impression structure of destruction or membrane structure release pressure in the above-mentioned prior art; Can't early warning; Cause the flammable and explosive substance of inside battery just is exposed to the problem of on fire or blast in the air; Provide a kind of simple in structure, can when pressurized acquires a certain degree, carry out early warning, the excessive lithium battery of necessary pressure-relief measure that adopts of battery pressure is used the early warning type explosion-proof plug.
The utility model solves the technical scheme that its technical problem adopted: a kind of lithium battery is used the early warning type explosion-proof plug; Monitored by the battery early warning system; Liquid injection hole coupling with in the battery cover board comprises sealing plug, sealing gasket and burst disk, and described sealing gasket pad is located at the bottom of liquid injection hole; Described sealing gasket, burst disk and sealing plug are fixed as an integral body from bottom to top; Described sealing gasket middle part is provided with through hole, and the recessed early warning and explosion pit that forms constitutes described burst disk by the explosion-proof loop of level with at the burst disk middle part, and described early warning and explosion pit is the early warning and explosion pit that shape receives the monitoring of battery early warning system.Be provided with like this, the burst disk of the utility model has three states when work, and first state is a normal condition, and second state is an alert status, and the third state is an alarm condition, when cell internal pressure just often, burst disk is first state; When inside battery is put or reason such as internal short-circuit causes battery operated electric current excessive owing to overcharging, crossing, thereby make the temperature of battery too high, produce the gas of HTHP; When inside battery air pressure arrived the warning degree, early warning and explosion pit bottom pressurized produced deformation, and burst disk is second state; The early warning and explosion pit is protruding; At this moment, the battery early warning system of the explosion-proof pit shape of monitoring and warning is promptly sent early warning signal, explains that inside battery has born the pressure that has surpassed normal pressure value; The user should take the necessary measures, and prevents that inside battery air pressure is excessive; When inside battery air pressure continuation increase, when reaching the cell internal pressure boundary, burst disk ruptures from cut channel groove place; Burst disk is the third state; Inside battery is accomplished the pressure release work of inside battery, at this moment through liquid injection hole and external communications; The battery early warning system of the explosion-proof pit shape of the monitoring and warning signal that can give the alarm, the user must take the necessary measures.
As preferably, the junction of said explosion-proof loop and early warning and explosion pit is provided with the cut channel groove.Be provided with like this, guaranteed to continue to increase when inside battery air pressure, when reaching the cell internal pressure boundary, the burst disk fracture from cut channel groove place has smoothly guaranteed the complete realization of inside battery pressure release.
As preferably, the junction thickness of said explosion-proof loop and early warning and explosion pit is 0.02 millimeter, and described cut channel groove is cut the bottom that is located at explosion-proof loop and early warning and explosion pit junction.The cut channel groove is cut the bottom that is located at explosion-proof loop and early warning and explosion pit junction and can under the enough again pressure explosion-proof loop and early warning and explosion pit be ruptured; The junction thickness decision inside battery atmospheric pressure boundary of explosion-proof loop and early warning and explosion pit; And then the decision burst disk is from the pressure of cut channel groove place fracture; Be the junction thicker of explosion-proof loop and early warning and explosion pit, it is big more that the early warning and explosion pit produces the required pressure of deformation for the first time, the thickness of 0.2 millimeter; Guaranteed that the burst disk that is made up of aluminium sheet circle can accomplish deformation for the first time when 0.6MPa pressure, reached the early warning effect.
As preferably, said cut channel groove depth be explosion-proof loop and early warning and explosion pit junction thickness 25%.Be provided with like this; Guaranteed that the burst disk that is made up of aluminium sheet circle can accomplish burst disk and break when 1MPa pressure; There is a comparatively reasonably pressure differential between the required pressure that pressure that early warning and explosion pit generation deformation for the first time is required and burst disk are broken, can plays the purpose of ladder property protection, both guaranteed that the early warning and explosion pit will inevitably produce deformation for the first time earlier; Burst disk just can take place then breaks; Stop in advance the break generation of this situation of burst disk, guaranteed that again difference can be not excessive between the required pressure that pressure that the deformation for the first time of early warning and explosion pit is required and burst disk break, prevented the generation of the meaningless situation of early warning.
As preferably, be provided with the spanner through hole in the middle part of the described sealing plug, said sealing plug lower central place is provided with groove.Be provided with like this, the spanner through hole is the installation that makes things convenient for sealing plug, and sealing plug lower central place is provided with and has enough spaces to make the early warning and explosion pit to become convex form by the pit form when groove has guaranteed burst disk deformation.
As preferably, described burst disk integral body is rounded, and described early warning and explosion pit is rounded, and described groove is also rounded, and the radius of said groove is greater than the radius of said early warning and explosion pit.Be provided with like this, have enough spaces to make the early warning and explosion pit become bursting form when having guaranteed burst disk deformation, guaranteed when inside battery air pressure is excessive, the burst disk pressure release of breaking smoothly by convex form.
As preferably, described through hole is rounded, and described early warning and explosion pit is rounded, and said through-hole diameter is smaller or equal to the diameter of said early warning and explosion pit.Be provided with like this, after burst disk was broken, burst disk can not fallen in the battery case.
The beneficial effect of the utility model is: the utility model is simple in structure, can when pressurized acquires a certain degree, carry out early warning, and the excessive pressure-relief measure that adopts necessity of battery pressure exists rationally excessively between early warning and the warning.
Description of drawings
Fig. 1 is a kind of cross section structure sketch map of the utility model;
Fig. 2 is a kind of cross section structure front elevational schematic of the utility model;
Fig. 3 is a kind of structural representation of burst disk in the utility model;
Fig. 4 is a kind of schematic cross-section of burst disk in the utility model;
Fig. 5 is a kind of structural representation of sealing gasket in the utility model;
Fig. 6 is a kind of structural representation of sealing plug in the utility model;
Fig. 7 is the local enlarged diagram at burst disk A place in the utility model;
Fig. 8 is the circuit diagram of a kind of battery early warning system of cooperating with the utility model.
Among the figure: 1, sealing plug, 2, burst disk, 3, sealing gasket, 4, battery cover board, 11, the spanner through hole, 21, the early warning and explosion pit, 22, explosion-proof loop, 23, the cut channel groove, 31, through hole, 41, control chip, 42, photoelectric sensor.
Embodiment
Below through specific embodiment, and combine accompanying drawing, the technical scheme of the utility model is further specified.
Embodiment 1:
A kind of lithium battery is with early warning type explosion-proof plug (referring to accompanying drawing 1 and accompanying drawing 2), and the liquid injection hole coupling with in the battery cover board 4 comprises sealing plug 1, sealing gasket 3 and burst disk 2; Sealing gasket 3 pads are located at the bottom of liquid injection hole, and sealing gasket 3, burst disk 2 and sealing plug 1 are fixed as an integral body from bottom to top, and sealing gasket 3 middle parts are provided with through hole; Burst disk 2 (referring to accompanying drawing 3 and accompanying drawing 4) is processed for the circle aluminium flake, and the recessed early warning and explosion pit 21 that forms constitutes by the explosion-proof loop 22 of level with at burst disk 2 middle parts, and early warning and explosion pit 21 is rounded; Early warning and explosion pit 21 is monitored by the battery early warning system for shape early warning and explosion pit 21, explosion-proof loop 22 (referring to accompanying drawing 7) is provided with cut channel groove 23 with the junction of early warning and explosion pit 21, and cut channel groove 23 is cut the bottom that is located at explosion-proof loop 22 and early warning and explosion pit 21 junctions; Cut channel groove 23 degree of depth are explosion-proof loop 22 and 25% of the junction thickness of early warning and explosion pit 21; The junction thickness that is explosion-proof loop 22 and early warning and explosion pit 21 is 0.2 millimeter, and the thickness of cut channel groove 23 is 0.05 millimeter, and sealing plug 1 (referring to accompanying drawing 6) is whole cylindrical; The diameter of sealing plug 1 is greater than the diameter of burst disk 2; The middle part of sealing plug 1 is provided with the spanner through hole 11 that runs through sealing plug 1 upper and lower surfaces, and spanner through hole 11 is interior hexagonal screw, and sealing plug 1 lower central place is provided with groove 12; The groove bottom of groove 12 is communicated with spanner through hole 11; Groove 12 is rounded, and the radius of groove 12 is greater than the radius of early warning and explosion pit 21, and sealing gasket 3 (referring to accompanying drawing 5) integral body is also cylindrical; The external diameter of sealing gasket 3 is greater than the diameter of burst disk 2; Sealing gasket 3 is the fluorubber material, and the middle part of sealing gasket 3 is provided with the through hole 31 that runs through sealing gasket 3 upper and lower surfaces, and the diameter of through hole 31 is less than the diameter of early warning and explosion pit 21.In the present embodiment, the junction thicker of explosion-proof loop 22 and early warning and explosion pit 21, it is big more that early warning and explosion pit 21 produces the required pressure of deformation for the first time; Cut channel groove 23 degree of depth are dark more; The required pressure that impels burst disk 2 to break is more little, and explosion-proof loop 22 is 0.2 millimeter with the junction thickness of early warning and explosion pit 21, explains when inside battery air pressure arrives 0.6MPa; Early warning and explosion pit 21 bottom pressurizeds produce deformation, and burst disk 2 deformation are second state; The thickness of cut channel groove 23 is 0.05 millimeter, and burst disk 2 fracture from cut channel groove 23 places, the burst disk 2 broken third state that form are described when inside battery air pressure arrives 1MPa.Having guaranteed that early warning and explosion pit 21 produces between the required pressure that the required pressure of deformation for the first time and burst disk 2 break exists a comparatively rational pressure differential; Can play the purpose of ladder property protection; Both guaranteed that early warning and explosion pit 21 will inevitably produce deformation for the first time earlier; Burst disk 2 just can take place then breaks; Stop in advance the break generation of this situation of burst disk 2, guaranteed that again difference can be not excessive between the required pressure that required pressure of early warning and explosion pit 21 deformation for the first time and burst disk 2 break, prevented the insignificant situation generation of early warning.
When present embodiment uses; Monitored by the battery early warning system, the battery early warning system can be customized by the battery user voluntarily, adopts following circuit at present: a kind of battery early warning system; Comprise DC power supply, alarm lamp L1, capacitor C 1, electric bell and sensitive switch K1; Wherein, parallelly connected with alarm lamp L1 after capacitor C 1 is connected with electric bell, alarm lamp L1, sensitive switch K1 and DC power supply three constitute the loop.Wherein sensitive switch K1 is a normal open switch.Sensitive switch K1 and early warning and explosion pit 21 butts.
During present embodiment work, burst disk 2 is having three states, and first state is a normal condition, and second state is an alert status, and the third state is an alarm condition.When cell internal pressure just often, burst disk is first state, promptly early warning and explosion pit 21 keeps recessed state, this moment, sensitive switch K1 kept normally open, electric bell and alarm lamp L1 all do not work; When inside battery owing to overcharge, cross and to put or a variety of causes such as internal short-circuit causes battery operated electric current excessive, thereby make the temperature of battery too high, produce the gas of HTHP; When inside battery air pressure arrived the warning degree, the thickness according to burst disk 2 in the present embodiment can be known, when inside battery air pressure arrives 0.6MPa; Early warning and explosion pit 21 bottom pressurizeds produce deformation, and burst disk 2 is second state, and early warning and explosion pit 21 becomes the epirelief shape; At this moment, sensitive switch K1 is closed by movable contact, and DC power supply is given alarm lamp L1 power supply; Give capacitor C 1 charging simultaneously, the battery early warning system of explosion-proof pit 21 shapes of monitoring and warning can be sent early warning signal, and just alarm lamp L1 lights; Explain that inside battery has born the very big pressure that has surpassed normal pressure value, should take the necessary measures, for example change battery; When inside battery air pressure continues to increase, when reaching the cell internal pressure boundary, can know according to the thickness of burst disk 2 and the thickness of cut channel groove 23 in the present embodiment, when inside battery air pressure arrives 1MPa; Burst disk 2 fracture from cut channel groove 23 places, burst disk is the third state, inside battery is accomplished the pressure release work of inside battery through liquid injection hole and external communications; At this moment, sensitive switch K1 is open circuit again, capacitor C 1 discharge; After keeping the audible alarm of electric bell a period of time, the battery early warning system of explosion-proof pit 21 shapes of monitoring and warning opens circuit, at this moment; Alarm lamp L1 does not work, and further reminds user's burst disk 2 to break, and this moment, something must be done to.
Embodiment 2:
Present embodiment and embodiment 1 are basic identical; Difference is: spanner through hole 11 is the triangle through hole, and present embodiment does not receive the monitoring of battery early warning system, during present embodiment work; Can be used as common impression structure explosion-proof plug uses; During use, do not produce the early warning effect, only produce the pressure-relief explosion-proof effect.
Embodiment 3:
Present embodiment and embodiment 1 are basic identical; Difference is: spanner through hole 11 is the in-line through hole, and the monitoring of battery early warning system is for being the battery early warning system of core with the photoelectric sensor in the present embodiment, and the battery early warning system comprises control chip, photoelectric sensor, warning lamp L2 and warning lamp L3; Warning lamp L2 in the present embodiment is that green light, warning lamp L2 are red light; The deformation of photoelectric sensor monitoring burst disk 2, controller 2 is according to the switching of the signal controlling warning lamp L2 and the warning lamp L3 of photoelectric sensor, when burst disk 2 is carried out first time deformation; Controller 2 is luminous according to the signal controlling warning lamp L2 of photoelectric sensor, and warning lamp L3 does not work; When burst disk 2 was broken, controller 2 was luminous according to the signal controlling warning lamp L3 of photoelectric sensor, and warning lamp L2 does not work, and reaches the warning purpose.
Above-described embodiment is a kind of preferable scheme of the utility model, is not the utility model is done any pro forma restriction, under the prerequisite that does not exceed the technical scheme that claim puts down in writing, also has other variant and remodeling.
Claims (7)
1. a lithium battery is used the early warning type explosion-proof plug; Monitored by the battery early warning system; Liquid injection hole coupling with in the battery cover board comprises sealing plug, sealing gasket and burst disk, and described sealing gasket pad is located at the bottom of liquid injection hole; Described sealing gasket, burst disk and sealing plug are fixed as an integral body from bottom to top; Described sealing gasket middle part is provided with through hole, it is characterized in that: the recessed early warning and explosion pit that forms constitutes described burst disk by the explosion-proof loop of level with at the burst disk middle part, and described early warning and explosion pit is the early warning and explosion pit that shape receives the monitoring of battery early warning system.
2. lithium battery according to claim 1 is used the early warning type explosion-proof plug, it is characterized in that: the junction of said explosion-proof loop and early warning and explosion pit is provided with the cut channel groove.
3. lithium battery according to claim 2 is used the early warning type explosion-proof plug, it is characterized in that: the junction thickness of said explosion-proof loop and early warning and explosion pit is 0.02 millimeter, and described cut channel groove is cut the bottom that is located at explosion-proof loop and early warning and explosion pit junction.
4. lithium battery according to claim 2 is used the early warning type explosion-proof plug, it is characterized in that: said cut channel groove depth be explosion-proof loop and early warning and explosion pit junction thickness 25%.
5. lithium battery according to claim 1 is used the early warning type explosion-proof plug, it is characterized in that: described sealing plug middle part is provided with the spanner through hole, and said sealing plug lower central place is provided with groove.
6. lithium battery according to claim 5 is used the early warning type explosion-proof plug; It is characterized in that: described burst disk integral body is rounded; Described early warning and explosion pit is rounded, and described groove is also rounded, and the radius of said groove is greater than the radius of said early warning and explosion pit.
7. use the early warning type explosion-proof plug according to claim 1 or 2 or 3 or 4 or 5 or 6 described lithium batteries, it is characterized in that: described through hole is rounded, and described early warning and explosion pit is rounded, and said through-hole diameter is smaller or equal to the diameter of said early warning and explosion pit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204841385U CN202363526U (en) | 2011-11-29 | 2011-11-29 | Early warning type anti-explosion plug for lithium battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011204841385U CN202363526U (en) | 2011-11-29 | 2011-11-29 | Early warning type anti-explosion plug for lithium battery |
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| Publication Number | Publication Date |
|---|---|
| CN202363526U true CN202363526U (en) | 2012-08-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011204841385U Expired - Fee Related CN202363526U (en) | 2011-11-29 | 2011-11-29 | Early warning type anti-explosion plug for lithium battery |
Country Status (1)
| Country | Link |
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| CN (1) | CN202363526U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447087A (en) * | 2011-11-29 | 2012-05-09 | 浙江海锂子新能源有限公司 | Early-warning type explosion-proof plug for lithium battery |
| CN114018511A (en) * | 2021-11-04 | 2022-02-08 | 中船澄西扬州船舶有限公司 | Cabin gas tightness detects frock |
-
2011
- 2011-11-29 CN CN2011204841385U patent/CN202363526U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102447087A (en) * | 2011-11-29 | 2012-05-09 | 浙江海锂子新能源有限公司 | Early-warning type explosion-proof plug for lithium battery |
| CN114018511A (en) * | 2021-11-04 | 2022-02-08 | 中船澄西扬州船舶有限公司 | Cabin gas tightness detects frock |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120801 Termination date: 20171129 |
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| CF01 | Termination of patent right due to non-payment of annual fee |