CN201490240U - Lithium battery cover plate with explosion protection and power-off protection device - Google Patents
Lithium battery cover plate with explosion protection and power-off protection device Download PDFInfo
- Publication number
- CN201490240U CN201490240U CN2009201347911U CN200920134791U CN201490240U CN 201490240 U CN201490240 U CN 201490240U CN 2009201347911 U CN2009201347911 U CN 2009201347911U CN 200920134791 U CN200920134791 U CN 200920134791U CN 201490240 U CN201490240 U CN 201490240U
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- Prior art keywords
- burst disk
- explosion
- lithium battery
- cover plate
- battery cover
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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 a lithium battery cover plate, particularly to a lithium battery cover plate with an explosion protection and power-off protection device. The lithium battery cover plate comprises an aluminum base plate, wherein an electrode through hole is formed on the aluminum base plate, and an annular support portion is arranged at the bottom of the electrode through hole. An explosion protection and power-off protection device is arranged inside the electrode through hole and comprises a metal top cover, an explosion protection disk, a venting perforated plate, an insulating spacer, an annular seal ring and an edge wrapping element. The lithium battery cover plate overcomes the shortcomings of the prior art. When the pressure inside the battery is oversize, the lithium battery cover plate firstly ejects the explosion protection disk to cut off the circuit to increase the internal volume of the battery and to reduce the pressure inside the battery, so as to achieve protection function; and when an extreme case occurs, the lithium battery cover plate enables the electrolyte to flow outside through the annular groove of the explosion protection disk, so as to protect the entire battery from exploding. The lithium battery cover plate has the characteristics of simple structure, high pressure endurance, good pressure relief uniformity, low fabrication cost, safe power cut and pressure relief, and so on, and can effectively prevent the battery from exploding.
Description
Technical field
The utility model relates to a kind of lithium battery cover plate, refers more particularly to a kind of lithium battery cover plate with explosion-proof and power-off protection apparatus with explosion-proof and breaker device.
Background technology
In recent years, because electronic equipment miniaturization day by day, lighting and portable bands such as video camera, electric tool, notebook computer, electric bicycle, and also develop to high power capacity, high security and lighting direction as the driving power that these electronic equipments are used.The totally-enclosed battery of lithium ion box hat is with characteristics such as the high power capacity of its electric core and part throttle characteristics excellences, and obtains increasingly extensive application.
Lithium-ion electric core is the accumulate parts of lithium battery, and it can produce abnormal gas along with the inside battery chemical reaction because of battery charger failure and factor such as too rechargeable in use, causes cell internal pressure excessive, thus generation battery explosion accident.Its consequence is damage equipment then gently, and is heavy then injure the user.Therefore, when cell internal pressure is excessive, for preventing battery explosion, must be with the gas leak in the battery.Its safeguard procedures normally are provided with protective device on battery cover.There is poor reliability in existing protective device, and withstand voltage scope is little, complex structure, weak points such as processing request height.
Based on above-mentioned the deficiencies in the prior art part, the inventor has developed the utility model a kind of " with the lithium battery cover plate of explosion-proof and power-off protection apparatus ".
The utility model content
The utility model at above-mentioned the deficiencies in the prior art technical problem to be solved is: a kind of lithium battery cover plate with explosion-proof and power-off protection apparatus with explosion-proof and breaker device is provided.
The technical scheme that its technical problem that solves the utility model adopts is:
A kind of lithium battery cover plate with explosion-proof and power-off protection apparatus, comprise aluminium base, be provided with an electrode through hole in aluminium base, the bottom of described electrode through hole is provided with annular brace portion, be provided with an explosion-proof and breaker device in the electrode through hole, this explosion-proof and breaker device is made up of casting coping, burst disk, vent panel, insulation spacer, annular seal ring and bound edge spare, wherein casting coping is positioned at explosion-proof and the breaker device top, the burst disk middle part is the rubber-like lower concave part, fits with top cover around the burst disk; Vent panel is provided with steam vent, and the lower concave part of burst disk is connected with the metal vent panel; Annular seal ring is sealedly attached to the periphery of casting coping, burst disk and vent panel; Annular bound edge spare is arranged in the outside of annular seal ring; Between the downside of annular bound edge spare and annular brace portion, be provided with insulation spacer; Annular bound edge spare explosion-proof and the breaker device outside fits with electrode through hole inboard, and weld mutually with the electrode through hole upper end of annular bound edge spare.When in use, aluminium base is contained in the metal shell upper end of lithium battery, and explosion-proof and breaker device is exactly the positive pole of battery, and aluminium base and metal shell are exactly the negative pole of lithium battery.When lithium battery interior pressure is excessive, burst disk is upspring and cut off circuit, internal cell volume increases, and pressure reduces, thereby plays a protective role.And when extreme case takes place, electrolyte is leaked to reach the cell integrated purpose of not blasting of protection, can be effectively and prevent battery explosion reliably.
Described casting coping is the convex cover-shaped body.
Described burst disk is an aluminium matter thin slice, and the lower concave part bottom of burst disk is the plane, and the upper surface of burst disk is provided with the annular groove that safety relief is used.
The same steam vent that is evenly distributed in a plurality of up/down perforations in described vent panel upper edge, vent panel middle part downside is provided with circular groove, and this bottom portion of groove edge is provided with a V-arrangement or trapezoidal
Annular groove or U-loop groove (down together).
The blast resistance construction of described burst disk and vent panel comprises the V-ring groove that is arranged on the vent panel and is located at annular groove on the burst disk, and burst disk and vent panel are connected by the some connected mode of multiple spot, when electric in-core portion pressure surpasses set point, through upwarding pressure of steam vent the lower concave part of burst disk is upwards lifted, and cause the V-ring groove of vent panel to disconnect, or tie point disconnects (this tie point is exactly two to six laser solder joints), thereby is separated with burst disk and cuts off circuit; If interior pressure continues to increase, then the annular groove of burst disk disconnects and pressure release.
Described burst disk lower concave part is connected with vent panel by laser spot welding at two to six along the circumferential direction uniform points.
The pressure set points of described electric in-core portion is 0.6-3.0Mpa, and the peak of this set point and the difference of minimum can be adjusted to 0.8-1.0Mpa as required.
A kind of manufacture method of the lithium battery cover plate with explosion-proof and power-off protection apparatus, it comprises the steps:
A, make top cover, burst disk, vent panel and insulation spacer respectively, and form sealing ring by high-temperature injection by mechanical stamping;
B, top cover is contained in burst disk top, with the burst disk bound edge, makes top cover with diel) the edge be wrapped in the burst disk;
C, with laser spot welder burst disk and vent panel are carried out along the circumferential direction equally distributed multiple spot welding then;
After d, welding are finished, the peripheral part of top cover, burst disk, vent panel is packed in the sealing ring, with sealing ring periphery parcel, more annular bound edge spare is placed the sealing ring outside with heat-sealing equipment, at last the upper end of annular bound edge spare is welded mutually with the electrode through hole, device completes.
The beneficial effect of a kind of lithium battery cover plate with explosion-proof and power-off protection apparatus of the utility model is:
Overcome the weak point of prior art to the security requirement of big electric current lithium battery cover plate, the utility model at first makes burst disk upspring and cuts off circuit when cell internal pressure is excessive, and internal cell volume increases, and pressure reduces, thereby plays a protective role.And when extreme case takes place, electrolyte is leaked to reach the cell integrated purpose of not blasting of protection.The utlity model has simple in structure, withstand voltage height, pressure release good uniformity, cost of manufacture is low, can cut off the power supply safely and characteristics such as pressure release, can be effectively and prevent battery explosion reliably.
Description of drawings
Below in conjunction with drawings and Examples the utility model is further specified.
Fig. 1 is an Aluminum cover overall structure front view of the present utility model;
Fig. 2 is the A-A cross-sectional view of Fig. 1;
Fig. 3 is an overall structure diagrammatic elevation view of the present utility model;
Fig. 4 is the B-B cross-sectional view of Fig. 3;
Fig. 5 is the overall structure diagrammatic elevation view of the utility model embodiment two;
Fig. 6 is the C-C cross-sectional view of Fig. 5.
Description of reference numerals:
10, Aluminum cover 20, bound edge spare 30, seal
40, top cover 50, vent panel 51, steam vent
53, V-ring groove
60, burst disk 61, lower concave part 62, annular groove
70, insulation spacer 100, explosion-proof and breaker device
Embodiment
Below in conjunction with embodiment a kind of lithium battery cover plate with explosion-proof and power-off protection apparatus that the technical program provides is narrated.
The utility model is to implement like this:
In Fig. 1 to Fig. 6, a kind of lithium battery cover plate with explosion-proof and power-off protection apparatus, comprise aluminium base 10, be provided with an electrode through hole 11 in aluminium base 10, the bottom of described electrode through hole 11 is provided with annular brace portion 12, be provided with an explosion-proof and breaker device 100 in the electrode through hole 11, this explosion-proof and breaker device 100 is by casting coping 40, burst disk 60, vent panel 50, insulation spacer 70, annular seal ring 30 and bound edge spare 20 are formed, wherein casting coping 40 is positioned at explosion-proof and breaker device 100 tops, burst disk 60 middle parts are rubber-like lower concave part 61, fit with top cover 40 around the burst disk 60; Vent panel 50 is provided with steam vent 51, and the lower concave part of burst disk 60 is connected with metal vent panel 50; Annular seal ring 30 is sealedly attached to the periphery of casting coping 40, burst disk 60 and vent panel 50; Annular bound edge spare 20 is arranged in the outside of annular seal ring 30; Between the downside of annular bound edge spare 20 and annular brace portion 12, be provided with insulation spacer 70; Annular bound edge spares 20 explosion-proof and breaker device 100 outsides fit with electrode through hole 11 inboards, and weld mutually with electrode through hole 11 upper end of annular bound edge spare 20.When in use, aluminium base is contained in the metal shell upper end of lithium battery, and explosion-proof and breaker device is exactly the positive pole of battery, and aluminium base and metal shell are exactly the negative pole of lithium battery.When lithium battery interior pressure is excessive, burst disk is upspring and cut off circuit, internal cell volume increases, and pressure reduces, thereby plays a protective role.And when extreme case takes place, electrolyte is leaked to reach the cell integrated purpose of not blasting of protection, can be effectively and prevent battery explosion reliably.
In the present embodiment, casting coping 40 is convex cover-shaped bodies.Burst disk 60 is an aluminium matter thin slice, and lower concave part 61 bottoms of burst disk 60 are the plane, and the upper surface of burst disk 60 is provided with the annular groove 62 that safety relief is used.The same steam vent that is evenly distributed in a plurality of up/down perforations in vent panel 50 upper edges, vent panel middle part downside is provided with circular groove, and this bottom portion of groove edge is provided with a V-ring groove.The blast resistance construction of burst disk 60 and vent panel 50 comprises the V-ring groove 53 that is arranged on the vent panel and is located at annular groove 62 on the burst disk 60, and burst disk 60 and vent panel 50 are connected by the some connected mode of multiple spot, when electric in-core portion pressure surpasses set point, through upwarding pressure of steam vent the lower concave part 61 of burst disk 60 is upwards lifted, and cause the V-ring groove 53 of vent panel 50 to disconnect, thereby be separated with burst disk 60 and cut off circuit; If interior pressure continues to increase, then the annular groove 62 of burst disk 60 disconnects and pressure release.Burst disk 30 lower concave parts 61 are connected with vent panel 40 by laser spot welding at six along the circumferential direction uniform points.The pressure set points of electricity in-core portion is 0.6-3.0Mpa (peak of this set point and the difference of minimum can be adjusted to 0.8-1.0Mpa as required).
The manufacture method of present embodiment comprises the steps:
A, make top cover 40, burst disk 60, vent panel 50 and insulation spacer 70 respectively, and form sealing ring 30 by high-temperature injection by mechanical stamping;
B, top cover 40 is contained in burst disk 60 tops, with burst disk 60 bound edges, the edge of top cover 40 is wrapped in the burst disk 60 with diel;
C, with laser spot welder burst disk 60 and vent panel 50 are carried out along the circumferential direction equally distributed multiple spot welding then;
After d, welding are finished, the peripheral part of top cover 40, burst disk 60, vent panel 50 is packed in the sealing ring 30, with sealing ring 30 periphery parcels, more annular bound edge spare 20 is placed sealing ring 30 outsides, at last with on the annular bound edge spare 20 with heat-sealing equipment
Electrode through hole 11 welds mutually, and device completes.
The above; it only is a kind of preferred embodiment of the lithium battery cover plate of the explosion-proof and power-off protection apparatus of the utility model band; be not that technical scope of the present utility model is imposed any restrictions; every foundation technical spirit of the present utility model all still belongs in the scope of technical solutions of the utility model above any trickle modification, equivalent variations and modification that embodiment did.
Claims (7)
1. lithium battery cover plate with explosion-proof and power-off protection apparatus, comprise aluminium base (10), be provided with an electrode through hole (11) in aluminium base (10), it is characterized in that: the bottom of described electrode through hole (11) is provided with annular brace portion (12), be provided with an explosion-proof and breaker device (100) in the electrode through hole (11), this explosion-proof and breaker device (100) is by casting coping (40), burst disk (60), vent panel (50), insulation spacer (70), annular seal ring (30) and bound edge spare (20) are formed, wherein casting coping (40) is positioned at explosion-proof and breaker device (100) top, burst disk (60) middle part is rubber-like lower concave part (61), fits with top cover (40) around the burst disk (60); Vent panel (50) is provided with steam vent (51), and the lower concave part of burst disk (60) is connected with metal vent panel (50); Annular seal ring (30) is sealedly attached to the periphery of casting coping (40), burst disk (60) and vent panel (50); Annular bound edge spare (20) is arranged in the outside of annular seal ring (30); Between the downside of annular bound edge spare (20) and annular brace portion (12), be provided with insulation spacer (70); Annular bound edge spare (20) explosion-proof and breaker device (100) outside fits with electrode through hole (11) inboard, and weld mutually with electrode through hole (11) upper end of annular bound edge spare (20).
2. the lithium battery cover plate with explosion-proof and power-off protection apparatus according to claim 1 is characterized in that described casting coping (40) is the convex cover-shaped body.
3. the lithium battery cover plate with explosion-proof and power-off protection apparatus according to claim 1; it is characterized in that described burst disk (60) is aluminium matter thin slice; lower concave part (61) bottom of burst disk (60) is the plane, and the upper surface of burst disk (60) is provided with the annular groove (62) that safety relief is used.
4. the lithium battery cover plate with explosion-proof and power-off protection apparatus according to claim 2; it is characterized in that the same steam vent that is evenly distributed in a plurality of up/down perforations in described vent panel (50) upper edge; vent panel middle part downside is provided with circular groove, and this bottom portion of groove edge is provided with a V-ring groove.
5. according to claim 1 or 3 described lithium battery cover plates with explosion-proof and power-off protection apparatus, the blast resistance construction that it is characterized in that described burst disk (60) and vent panel (50) comprises the V-ring groove (53) that is arranged on the vent panel and is located at annular groove (62) on the burst disk (60), and burst disk (60) and vent panel (50) are connected by the some connected mode of multiple spot, when electric in-core portion pressure surpasses set point, through upwarding pressure of steam vent the lower concave part (61) of burst disk (60) is upwards lifted, and cause the V-ring groove (53) of vent panel (50) to disconnect, thereby be separated with burst disk (60) and cut off circuit; If interior pressure continues to increase, then the annular groove (62) of burst disk (60) disconnects and pressure release.
6. the lithium battery cover plate with explosion-proof and power-off protection apparatus according to claim 5 is characterized in that described burst disk (60) lower concave part (61) is connected with vent panel (40) by laser spot welding at six along the circumferential direction uniform points.
7. the lithium battery cover plate with explosion-proof and power-off protection apparatus according to claim 5 is characterized in that the pressure set points of described electric in-core portion is 0.6-3.0Mpa.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201347911U CN201490240U (en) | 2009-08-14 | 2009-08-14 | Lithium battery cover plate with explosion protection and power-off protection device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009201347911U CN201490240U (en) | 2009-08-14 | 2009-08-14 | Lithium battery cover plate with explosion protection and power-off protection device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201490240U true CN201490240U (en) | 2010-05-26 |
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ID=42429108
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009201347911U Expired - Lifetime CN201490240U (en) | 2009-08-14 | 2009-08-14 | Lithium battery cover plate with explosion protection and power-off protection device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201490240U (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588931A (en) * | 2011-01-06 | 2012-07-18 | 海洋王照明科技股份有限公司 | Explosion-proof seal structure |
| CN106450134A (en) * | 2016-07-26 | 2017-02-22 | 江苏索尔新能源科技股份有限公司 | Positive and negative pressure-relief battery core |
| CN107359296A (en) * | 2017-07-24 | 2017-11-17 | 山东高佳新能源有限公司 | A kind of lithium battery module and its pressure relief device |
| CN108390007A (en) * | 2018-04-24 | 2018-08-10 | 苏州聚天合金属科技有限公司 | A kind of breaker device automatically cut off for new energy battery current |
| CN108390008A (en) * | 2018-04-24 | 2018-08-10 | 苏州聚天合金属科技有限公司 | It is a kind of to answer power apparatus for what new energy battery current was automatically cut off |
| CN109148783A (en) * | 2018-10-11 | 2019-01-04 | 东莞市海拓伟电子科技有限公司 | A kind of explosion-proof type Notebook Battery |
| US10804522B2 (en) | 2016-02-25 | 2020-10-13 | Byd Company Limited | Single-cell battery, battery module, power battery, and electric vehicle |
-
2009
- 2009-08-14 CN CN2009201347911U patent/CN201490240U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102588931A (en) * | 2011-01-06 | 2012-07-18 | 海洋王照明科技股份有限公司 | Explosion-proof seal structure |
| US10804522B2 (en) | 2016-02-25 | 2020-10-13 | Byd Company Limited | Single-cell battery, battery module, power battery, and electric vehicle |
| CN106450134A (en) * | 2016-07-26 | 2017-02-22 | 江苏索尔新能源科技股份有限公司 | Positive and negative pressure-relief battery core |
| CN107359296A (en) * | 2017-07-24 | 2017-11-17 | 山东高佳新能源有限公司 | A kind of lithium battery module and its pressure relief device |
| CN107359296B (en) * | 2017-07-24 | 2023-11-10 | 东营悦泰技术服务有限公司 | Lithium battery module and pressure relief device thereof |
| CN108390007A (en) * | 2018-04-24 | 2018-08-10 | 苏州聚天合金属科技有限公司 | A kind of breaker device automatically cut off for new energy battery current |
| CN108390008A (en) * | 2018-04-24 | 2018-08-10 | 苏州聚天合金属科技有限公司 | It is a kind of to answer power apparatus for what new energy battery current was automatically cut off |
| CN109148783A (en) * | 2018-10-11 | 2019-01-04 | 东莞市海拓伟电子科技有限公司 | A kind of explosion-proof type Notebook Battery |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee |
Owner name: SHENZHEN KEDALI INDUSTRIAL CO., LTD. Free format text: FORMER NAME: SHENZHEN KEDALI INDUSTRY CO., LTD. |
|
| CP01 | Change in the name or title of a patent holder |
Address after: 518109, Shenzhen, Guangdong, Baoan District Longhua pine second industrial zone, fourth buildings, one to four floor Patentee after: Shenzhen Kedali Industrial Co., Ltd. Address before: 518109, Shenzhen, Guangdong, Baoan District Longhua pine second industrial zone, fourth buildings, one to four floor Patentee before: Shenzhen KDL Industrial Co., Ltd. |
|
| CX01 | Expiry of patent term | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100526 |