CN105118936A - Gigohm-level anti-explosion and combustion-proof cover cap of power battery - Google Patents
Gigohm-level anti-explosion and combustion-proof cover cap of power battery Download PDFInfo
- Publication number
- CN105118936A CN105118936A CN201510558629.2A CN201510558629A CN105118936A CN 105118936 A CN105118936 A CN 105118936A CN 201510558629 A CN201510558629 A CN 201510558629A CN 105118936 A CN105118936 A CN 105118936A
- Authority
- CN
- China
- Prior art keywords
- seal ring
- explosion
- pressure release
- cover cap
- gigohm
- 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.)
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/147—Lids or covers
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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
- H01M50/10—Primary casings, jackets or wrappings of a single cell or a single battery
- H01M50/183—Sealing members
-
- 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
-
- 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 relates to a gigohm-level anti-explosion and combustion-proof cover cap of a power battery. The gigohm-level anti-explosion and combustion-proof cover cap comprises an upper cover cap, an anti-explosion membrane with a wall body, a perforated plate, an inner sealing ring and an outer sealing ring, wherein the upper cover cap is arranged on the upper end face of the anti-explosion membrane and is inwards bent and pressed from the wall body in a state of being ultrasonically welded on the upper end face of the upper cover cap by multiple points; a plurality of air holes are uniformly formed in the upper cover cap; a turnover prestress release buckle connected to the upper cover cap is arranged in each air hole; the lower end face of the anti-explosion membrane is welded with the perforated plate; the outer sealing ring is glued to cover the outer walls of the upper cover cap and the anti-explosion membrane; the upper and lower edges of the outer sealing ring are inwards bent and glued to press the upper cover cap or the upper end face of the bent wall body of the anti-explosion membrane and the lower end face of the anti-explosion membrane. The gigohm-level anti-explosion and combustion-proof cover cap is characterized in that a plurality of pressure release lines respectively corresponding to the multiple turnover prestress release buckles are uniformly distributed on the anti-explosion membrane; the pressure release lines are non-closed single arc-shaped curves, or two or more than two pressure release lines with structures intersected at one point.
Description
Technical field
This
inventionrelate to a kind of battery cap, be a kind of micro-resistance specifically, without explode, do not burn, the cylindrical lithium ion power cell gigohm level firing and explosion prevention of big current burns and blocks a shot.
Background technology
Power battery cap is the critical component of electrokinetic cell also known as big current lithium ion battery, and he is directly connected to the security performance of battery, amount of capacity, useful life, safety big current, the producer and user and produces and use safety.Existing cylinder-type power battery block mainly contains upper cap, pad, the rupture pressure disc of band body of wall, sealing ring, orifice plate composition.Such block is under battery activated high power charging-discharging or when battery is abnormal, pad heating is serious, the ability that rupture pressure disc closed circular pressure relief ring amasss electric current by current cross section is severely limited, the battery abnormal heating when pure electric bus etc. needs to start instantaneous large-current, power-off or unlatching in advance, can not ensure that cell safety is explosion-proof and anti-burning.In order to improve the security performance of battery and the ability by sectional area electric current, the C shape that closed pressure rings of blocking a shot makes into not close by we or Y shape pressure release line, the material section increasing big current safety is amassed, be not subject to impact and the restriction of pressure relief ring, cancel the pad that heating is the most serious, reserve upset by upper cap and answer pressure release button and explosion-proof line to coordinate block pressure release to open in advance.Internal resistance to drop to below 0.1 milliohm (below 100 gigohms) from 1 milliohm, changes and uses one deck sealing ring to become two-layer sealing ring, needed by battery sealing ring two kinds of functions separately to complete, and outer ring guarantees that block is flexible in battery seal safety, high-temperature fusion.When inner ring guarantees limit high/low temperature and normal temperature, rigidity is not burnt.
As patent No. explosion-proof cap of micro-resistance cylindrical lithium ion battery disclosed in ZL201020180890.6, mainly contain upper cap, pad, the rupture pressure disc of band body of wall, sealing ring, orifice plate composition.Such block under battery abnormality or battery activated discharge and recharge time, pad heating is serious, closed circular pressure relief ring rupture pressure disc explosion-proof capabilities extremely unstable, when blocking a shot cleaning in the course of processing, welding, battery seal because the reasons such as vibration of ultrasonic wave, all directions are stressed are opened very easily in advance, or opening pressure reduces, and causes also not having laser solder joint to break power-off and just opens pressure release.When pressure release is just opened in not power-off, release the high-temperature gas come be easy to run into oxygen and play a role together with the not fire-retardant medium that catches fire such with sealing ring and burn, even during certain high temperature, sealing ring can not limit orifice plate and follow rupture pressure disc to overturn together, the sealing ring of melting can block upper cap gas outlet, and continuously energising can allow cell internal pressure infinitely raise and explode.The ring dress pressure rings closed mainly carrys out mineralization pressure pressure relief opening by thinning material, and block is severely limited by the ability of sectional area electric current like this, the battery abnormal heating when pure electric bus etc. needs to start instantaneous large-current, power-off or unlatching in advance.
In addition, when cell package block is with box hat, adopt the radial and axial pressing box hat of mould and block, block is to being subject to radial pressure and axial compressive force joint effect, radial pressure and axial compressive force cooperation can make sealing ring and rupture pressure disc distortion, orifice plate and rupture pressure disc is caused to misplace and cause battery to be scrapped although sealing ring can be cut off by hollow out radial through sealing ring, but can not ensure rupture pressure disc stressed irregular cause closed circular pressure relief ring superpose or thinning, such indentation goes out superposition and opening pressure can be caused infinitely great, and battery cannot normally be opened and explode; Indentation draws thin, and the reduction of pressure release opening pressure causes battery open in advance and scrap reduction of service life.
Summary of the invention
In order to can not normally open after solving the upset of prior art medium power battery cap rupture pressure disc pressure release, block internal resistance unstable, can not smoothly by instantaneous large-current, use that big current heating is serious, battery easy firing, useful life is short, and block normal produce and block and box hat encapsulate time, the rupture pressure disc of block yieldingly breaks, rupture pressure disc misplaces with orifice plate, and fracture causes battery to be scrapped, rupture pressure disc Superposed Deformation causes the drawback such as battery explosion, easy firing,
inventionobject be to provide the upset of a kind of rupture pressure disc after normally open pressure release, internal resistance stabilizes, long service life, without distortion dislocation, explosion-proof performance stablizes, produces and the electrokinetic cell gigohm level firing and explosion prevention of use safety burns and blocks a shot.
This
inventionthe technical scheme adopted is: a kind of electrokinetic cell gigohm level firing and explosion prevention burns block, comprise upper cap, with the rupture pressure disc of body of wall, orifice plate and interior, exterior seal ring, upper cap be arranged on rupture pressure disc upper surface in by the inside bending compression of body of wall and ultrasonic wave multi-point welding in upper cap upper surface state, uniform by multiple pore in upper cap, be equipped with the upset be connected in upper cap in each pore and answer pressure release button in advance, rupture pressure disc lower surface welding orifice plate, exterior seal ring superscribes the outer wall of block outer wall and rupture pressure disc, exterior seal ring upper, below inwardly bending compresses upper cap or the upper surface of rupture pressure disc bending body of wall and the lower surface of rupture pressure disc, it is characterized in that: described rupture pressure disc is evenly equipped with multiple corresponding multiple upset respectively and answers the pressure release line of pressure release button in advance, described pressure release line is the single arc curve do not closed, or pressure release line is two structures meeting at any to reach the standard grade.
Further, under described exterior seal ring, Edge Bend forms circular cavity, establishes inner seal ring in circular cavity, the corresponding circular intracavity sidewall location or spacing of inner seal ring, inner seal ring lower surface is provided with a brace table, and orifice plate location or limited support are on brace table or in brace table.
Further, described inner seal ring supporting platform thickeies, and inner seal ring brace table periphery is hollow out or featheredge structure.
Further, convex under described rupture pressure disc center is steamed bun dress ridge structure, and pressure release line is arranged in steamed bun dress ridge structure or the root of steamed bun dress ridge structure, and orifice plate laser spot welding is connected in rupture pressure disc steamed bun dress ridge structure.
Further, described orifice plate lower surface ultrasonic bonding transition lug.
On be covered with multiple pore and upset answer pressure release button in advance, upper cap is wrapped in body of wall by the body of wall bending of rupture pressure disc, by ultrasonic bonding by upper cap and the several fusion of rupture pressure disc, make its overall internal resistance constant in gigohm level, embed and scribble in the exterior seal ring of glue, and carry out wrapper and wrap up in tightly.By lower embedding inner seal ring and orifice plate, orifice plate and rupture pressure disc laser spot welding.What rupture pressure disc bottom surface had steamed bun to fill ridge structure and various shape answers pressure release release line in advance, steamed bun dress ridge structure highest point is a smooth jig, the jig that platform and orifice plate are reserved fits tightly, and by laser circulation welding, coordinates inner seal ring to form the control point of pressure power-off.In an abnormal situation, interior voltage rise high-temperature raises battery, and rupture pressure disc steamed bun eminelntia capitata is to the upset of upper cap direction, and in setting pressure, orifice plate and rupture pressure disc laser solder joint come off, and battery is forced power-off; Interior pressure continues to raise, and rupture pressure disc steamed bun eminelntia capitata is overturn over completely, answers pressure release release line to coordinate upper cap upset to answer pressure release to be buckled in the opened by pressure pressure release of setting in advance in advance.
This
inventionadvantage be:
1, upper cap is provided with upset and answers pressure release button in advance in venthole, upset answers pressure release to be buckled in rupture pressure disc in advance and orifice plate throws off rear thoroughly upset, prop up rupture pressure disc pressure release line, under preventing limit high and low temperature environment, the rear rupture pressure disc of distortion withstands upper cover because environment reason expands and can not normally open, and carries out secondary and forces puncture rupture pressure disc and open pressure release.
2, rupture pressure disc is by the pressure release line whole steamed bun shape bulge-structure being arranged multiple C shape or Y shape and do not close, to big current from pressure release line periphery by having reserved enough spaces, reserved big current passes through the necessary sectional area of material, prevent big current from being heated up instantaneously by small size instantaneously, the radial and axial pressure passed over that passes over of mould when also having cushioned block and box hat encapsulation, guarantee that explosion-proof line does not superpose or draws thin, improve cell safety explosion-proof performance.
3, upper cap and be not less than the ultrasonic bonding of three points with rupture pressure disc body of wall bending part, after welding, upper cap and rupture pressure disc are connected as a single entity, and eliminate the space contacting generation each other, reduce overall internal resistance;
4, exterior seal ring adopts and material modifiedly guarantees enough elasticity, the strong acid of resistance to highly basic ability, the high temperature resistant and ability of melting, enough elasticity envelopes are had incessantly to ensure sealing no leakage in space when normal temperature lower cover cap and box hat encapsulation, do not followed the string by strong acid and alkali corrosion, after high temperature, have certain melt capacity.
5, interior exterior seal ring adopts fire proofing, guarantees that high temperature is missing of ignition, inner ring high temperature is softening, non-conductive guarantee battery normal power down after normally open pressure release, without blast and flammability issues, guarantee to produce and use safety.Brace table position inner seal ring supporting orifice plate thickeies to be strengthened, simultaneously and upper cap coordinate guarantee cell internal pressure increase after orifice plate and rupture pressure disc depart from clean, do not follow rupture pressure disc to move toward upper cover direction together.Brace table periphery adopts the mode of featheredge or hollow out, the radial load passed over when blocking a shot and box hat encapsulates can make wing limit or the distortion of hollow out limit, directly power transmission, does not guarantee that orifice plate and rupture pressure disc do not misplace and disconnects in advance, improve cell safety explosion-proof performance and anti-burning performance.
Compact conformation of the present invention, simply, indeformable, internal resistance is low, and normal power down under various limit high and low temperature environment and abnormality also opens pressure release, the anti-burning stable performance of blast protection, long service life.
Accompanying drawing explanation
Fig. 1 is this
inventionstructural representation;
Fig. 2 is Fig. 1 vertical view;
Fig. 3 is Fig. 1 upward view;
Fig. 4 is inner seal ring structural representation;
Fig. 5 is a kind of example structure schematic diagram of rupture pressure disc;
Fig. 6 is the another kind of example structure schematic diagram of explosion-proof film.
In figure: upper cap 1, pore 2, upset answers pressure release button 3, rupture pressure disc 4, body of wall 5, steamed bun shape bulge-structure 6, C shape pressure release line 7, Y shape pressure release line 71, exterior seal ring 9, orifice plate 10, transition lug 11, inner seal ring 12, brace table 13, featheredge 14 in advance.
Embodiment
Below in conjunction with drawings and Examples to this
inventionbe described further.
Shown in Fig. 1-4: a kind of electrokinetic cell gigohm level firing and explosion prevention burns block and comprises upper cap 1, rupture pressure disc 4 with body of wall 5, orifice plate 10, transition lug 11, inner seal ring 12 and exterior seal ring 9, upper cap 1 be arranged on rupture pressure disc 4 upper surface in by body of wall 5 inwardly bending compression and ultrasonic wave multi-point welding in upper cap 1 upper surface state, uniform by multiple pore 2 in upper cap 1, be equipped with the upset be connected in upper cap 1 in each pore 2 and answer pressure release button 3 in advance, convex under center, rupture pressure disc 4 lower surface is steamed bun dress ridge structure 6, steamed bun dress ridge structure 6 is platform-like and multiple spot laser spot welding connects orifice plate 10, what the root of steamed bun dress ridge structure 6 upper cover weld or steamed bun dress ridge structure 6 was provided with that corresponding upset answers pressure release button 3 in advance does not close single arc curve structure pressure release line or two meet at any structure pressure release line to reach the standard grade, exterior seal ring 9 superscribes the outer wall of block 1 outer wall and rupture pressure disc 4, the inside bending in upper and lower limit of exterior seal ring 9 compresses the upper surface of rupture pressure disc bending body of wall 5 and the lower surface of rupture pressure disc 4, exterior seal ring 9 times Edge Bends form circular cavity, inner seal ring 12 is established in circular cavity, the corresponding circular intracavity sidewall location or spacing of inner seal ring 12, inner seal ring 12 lower surface is provided with a brace table 13, orifice plate 10 is located or limited support on brace table or in brace table, inner seal ring supporting platform thickeies, and inner seal ring brace table periphery is hollow out or featheredge structure, orifice plate 10 lower surface ultrasonic bonding transition lug 11.
Shown in Fig. 5: it is C shape pressure release line 7 that the steamed bun shape bulge-structure 6 of rupture pressure disc 4 does not close the pressure release of single arc curve structure, the upset of C shape pressure release line 7 correspondence answers pressure release to buckle 3 in advance, and when rupture pressure disc 4 is upwards dug with inner pressure of battery, correspondence is answered pressure release button 3 to act on lower C shape pressure release line 7 in advance by upset and opened pressure release.
Shown in Fig. 6: it is Y shape pressure release line 71 that the steamed bun shape bulge-structure 6 of rupture pressure disc 4 does not close the pressure release of single arc curve structure, the upset of Y shape pressure release line 71 correspondence answers pressure release to buckle 3 in advance, and when rupture pressure disc 4 is upwards dug with inner pressure of battery, correspondence is answered pressure release button 3 to act on lower Y shape pressure release line 71 in advance by upset and opened pressure release.
Claims (5)
1. an electrokinetic cell gigohm level firing and explosion prevention burns block, comprise upper cap, with the rupture pressure disc of body of wall, orifice plate and interior, exterior seal ring, upper cap be arranged on rupture pressure disc upper surface in by the inside bending compression of body of wall and ultrasonic wave multi-point welding in upper cap upper surface state, uniform by multiple pore in upper cap, be equipped with the upset be connected in upper cap in each pore and answer pressure release button in advance, rupture pressure disc lower surface welding orifice plate, exterior seal ring gluing superscribes the outer wall of block outer wall and rupture pressure disc, exterior seal ring upper, below inwardly bending gluing compresses upper cap or the upper surface of rupture pressure disc bending body of wall and the lower surface of rupture pressure disc, it is characterized in that: described rupture pressure disc is evenly equipped with multiple corresponding multiple upset respectively and answers the pressure release line of pressure release button in advance, described pressure release line is the single arc curve do not closed, or pressure release line is two structures meeting at any to reach the standard grade.
2. a kind of electrokinetic cell gigohm level firing and explosion prevention according to claim 1 burns block, it is characterized in that: under described exterior seal ring, Edge Bend forms circular cavity, inner seal ring is established in circular cavity, the corresponding circular intracavity sidewall location or spacing of inner seal ring, inner seal ring lower surface is provided with a brace table, and orifice plate location or limited support are on brace table or in brace table.
3. a kind of electrokinetic cell gigohm level firing and explosion prevention according to claim 2 burns block, it is characterized in that: described inner seal ring supporting platform thickeies, and inner seal ring brace table periphery is hollow out or featheredge structure.
4. a kind of electrokinetic cell gigohm level firing and explosion prevention according to claim 1 burns block, it is characterized in that: convex under described rupture pressure disc center is steamed bun dress ridge structure, pressure release line is arranged in steamed bun dress ridge structure or the root of steamed bun dress ridge structure, and the electric welding of orifice plate laser is connected in rupture pressure disc steamed bun dress ridge structure.
5. a kind of electrokinetic cell gigohm level firing and explosion prevention according to claim 1 burns block, it is characterized in that: described orifice plate lower surface ultrasonic bonding transition lug.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558629.2A CN105118936B (en) | 2015-09-06 | 2015-09-06 | A kind of anti-burning block of power battery explosion protection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510558629.2A CN105118936B (en) | 2015-09-06 | 2015-09-06 | A kind of anti-burning block of power battery explosion protection |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105118936A true CN105118936A (en) | 2015-12-02 |
| CN105118936B CN105118936B (en) | 2017-12-01 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510558629.2A Active CN105118936B (en) | 2015-09-06 | 2015-09-06 | A kind of anti-burning block of power battery explosion protection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898717A (en) * | 2017-04-19 | 2017-06-27 | 朱剑 | A kind of fast charging and discharging type electrokinetic cell safe cap |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2411578Y (en) * | 2000-03-23 | 2000-12-20 | 信息产业部电子第十八研究所 | Explosion-proof lid for cylindrical lithium ion storage battery |
| JP2003217544A (en) * | 2002-01-22 | 2003-07-31 | Shin Kobe Electric Mach Co Ltd | Sealed battery |
| JP2005149862A (en) * | 2003-11-14 | 2005-06-09 | Shin Kobe Electric Mach Co Ltd | Sealed battery |
| CN2793932Y (en) * | 2005-05-13 | 2006-07-05 | 深圳粤宝电子工业总公司 | Explosive-proof cover of battery |
| CN204927368U (en) * | 2015-09-06 | 2015-12-30 | 朱剑 | Explosion -proof anti -flaming fever of power battery gigohm level block |
-
2015
- 2015-09-06 CN CN201510558629.2A patent/CN105118936B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2411578Y (en) * | 2000-03-23 | 2000-12-20 | 信息产业部电子第十八研究所 | Explosion-proof lid for cylindrical lithium ion storage battery |
| JP2003217544A (en) * | 2002-01-22 | 2003-07-31 | Shin Kobe Electric Mach Co Ltd | Sealed battery |
| JP2005149862A (en) * | 2003-11-14 | 2005-06-09 | Shin Kobe Electric Mach Co Ltd | Sealed battery |
| CN2793932Y (en) * | 2005-05-13 | 2006-07-05 | 深圳粤宝电子工业总公司 | Explosive-proof cover of battery |
| CN204927368U (en) * | 2015-09-06 | 2015-12-30 | 朱剑 | Explosion -proof anti -flaming fever of power battery gigohm level block |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106898717A (en) * | 2017-04-19 | 2017-06-27 | 朱剑 | A kind of fast charging and discharging type electrokinetic cell safe cap |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105118936B (en) | 2017-12-01 |
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| TA01 | Transfer of patent application right |
Effective date of registration: 20170914 Address after: 225400, Jiangsu Province, Taizhou City, Taixing Province Sichuan Street Village Applicant after: Taixing Xinye Electronic Co. Ltd. Address before: 225400 Taixing City, Taizhou Province, No. East Road, room 118, room 1305 Applicant before: Zhu Jian |
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| TA01 | Transfer of patent application right | ||
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Inventor after: Zhu Xinyu Inventor after: Zhu Jian Inventor before: Zhu Jian |
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