CN205122672U - Safety valve of lithium ionic cell - Google Patents
Safety valve of lithium ionic cell Download PDFInfo
- Publication number
- CN205122672U CN205122672U CN201520743543.2U CN201520743543U CN205122672U CN 205122672 U CN205122672 U CN 205122672U CN 201520743543 U CN201520743543 U CN 201520743543U CN 205122672 U CN205122672 U CN 205122672U
- Authority
- CN
- China
- Prior art keywords
- explosionproof hole
- lithium ion
- ion battery
- safety valve
- burst disk
- 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.)
- Expired - Fee Related
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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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- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model relates to a safety valve of lithium ionic cell, explosion proof hole on the lithium ion battery apron, explosion proof hole's bottom or top are equipped with explosion -proof piece, explosion proof hole bottom coating / cover matcoveredn, the thickness of protective layer is 0.01mm-2mm, and the explosion proof hole diameter is 1-20mm, and the degree of depth is 0.2-10mm, explosion -proof piece is the cylinder, and the diameter is 1-20mm, and thickness is 0.01-10mm. The utility model discloses the product has intensity height, prevention of liquid leakage, has good damping performance, improves the reliability of battery.
Description
Technical field
The utility model relates to safety valve for battery, particularly relates to a kind of safety valve for lithium ion battery structure.
Background technology
Along with the appearance of the full-fledged of lithium ion battery technology and more high Energy Density Materials, lithium ion battery is more and more widely used in electric automobile field, and its fail safe also improves a lot than digital energy storage Li-like ions battery in the past.Lithium ion battery is when being subject to the affecting of the abnormal factors such as short circuit, high heat, overcharge, and inside battery easily forms gases at high pressure, and battery container can be caused to be out of shape the danger of even battery explosion.In order to improve the fail safe of battery, must assemble safety valve in the battery, when cell internal pressure rises to a certain degree, safety valve can be opened rapidly and be discharged by gas, and inner pressure of battery declines, thus prevents battery explosion, plays safeguard protection effect.
At present, the safety valve of lithium ion battery is generally arranged on metal cover board, is typically employed in punching press one explosionproof hole on cover plate, in explosionproof hole bottom welding burst disk as safety valve, when cell internal pressure is larger, easily break in burst disk place, and gas is released at burst disk place.But the burst disk of this type is when welding; be difficult to avoid weld to produce stain or fried point; or the husky hole that stress inequality is formed and crackle; with electrolyte Long contact time after or in Transport Vibration process; the easy corrosion failure of burst disk even comes off, and does not have cell safety protective effect.
Utility model content
The purpose of this utility model solves the technical problem that existing lithium cell safety valve exists, and provides that a kind of intensity is high, liquid-leakage preventing, has good damping performance, improve the safety valve for lithium ion battery of the reliability of battery.
A kind of safety valve for lithium ion battery, comprise the explosionproof hole be arranged on lithium ion battery cover board, bottom or the top of described explosionproof hole are provided with burst disk, apply bottom described explosionproof hole or be coated with protective layer, the thickness of described protective layer is 0.01mm ~ 2mm, described explosionproof hole diameter is 1 ~ 20mm, and the degree of depth is 0.2 ~ 10mm; Described burst disk is cylinder, and diameter is 1 ~ 20mm, and thickness is 0.01 ~ 10mm.
As preferably, described protective layer is circular, square or polygon, and its center is corresponding with explosionproof hole center, and edges cover is on the lower surface of cover plate.
As preferably, described burst disk is welded on bottom explosionproof hole, and its lower surface flushes with bottom explosionproof hole, is coated with layer protective layer bottom described burst disk, and described protective layer is protection glue-line.
As preferably, described burst disk is welded on explosionproof hole top, and its upper surface flushes with explosionproof hole top, is coated with layer protective layer bottom described explosionproof hole, and described protective layer is plastic film, and plastic film can be one or several the combination in PP, PE, PET.
As preferably, described explosionproof hole and cover plate central spacing are 2mm-20mm.
As preferably, described burst disk material is stainless steel, aluminium alloy, Copper Foil, aluminium foil; Described cover plate material is stainless steel or aluminium alloy.
Burst disk is welded on bottom or the top of explosionproof hole by safety valve for lithium ion battery described in the utility model, and bottom explosionproof hole, apply/cover layer protective layer, protective layer can avoid burst disk not break by electrolyte erosion, and vibration causes burst disk to break in preventing battery from transporting, thus prevent leakage of lithium ion battery, and, when burst disk weld has husky hole or micro-crack, protective layer can also available protecting burst disk, prevents battery leakage; In addition, when inside lithium ion cell short circuit or other reasons cause battery temperature rising to reach 120 degree, this protective layer becomes inefficacy molten condition, and the excessive burst disk of inner pressure of battery is broken, thus cell internal pressure effectively discharges, and guarantees the security performance of battery.
Accompanying drawing explanation
Fig. 1 is the safety valve for lithium ion battery plan structure schematic diagram of embodiment 1;
Fig. 2 is the safety valve for lithium ion battery cutaway view of embodiment 1;
Fig. 3 is the safety valve for lithium ion battery cutaway view of embodiment 2.
Embodiment
Embodiment 1
As shown in Figure 1-2; a kind of safety valve for lithium ion battery; comprise the explosionproof hole 2 be arranged on lithium ion battery cover board 1; the bottom welding of described explosionproof hole 2 has burst disk 3, and described burst disk 3 lower surface flushes with bottom explosionproof hole 2, is coated with one deck protection glue-line 4 bottom described burst disk 3; in the present embodiment; described protection glue-line 4 is circular, and its center is corresponding with explosionproof hole 2 center, and edges cover is on the lower surface of cover plate 1.The thickness of protection glue-line 4 is generally 0.01mm ~ 2mm; explosionproof hole 2 is determined according to the specification of lithium ion battery; general diameter is 1 ~ 20mm; the degree of depth is 0.2mm ~ 10mm; explosionproof hole 2 and cover plate 1 center distance are generally 2mm-20mm; described burst disk 3 is cylinder, and thickness generally gets 0.01 ~ 10mm.Lithium ion battery cover board 1 diameter of the present embodiment is 40mm, and thickness is 5mm, and explosionproof hole 2 degree of depth is 5mm, and diameter is 2.5mm.The diameter of described burst disk 3 is slightly larger than the diameter of explosionproof hole 2, and it can be made closely to be fixed in explosionproof hole 2, and burst disk 3 thickness is 1.5mm; Protection glue-line 4 diameter is 3mm, and thickness is 0.08mm.Explosionproof hole 2 and cover plate 1 center distance are 10mm.Described cover plate 1 material is stainless steel, and described burst disk 3 material is also stainless steel.
Embodiment 2
As shown in Figure 3, a kind of safety valve for lithium ion battery, comprise the explosionproof hole 2 be arranged on lithium ion battery cover board 1, the welded top of described explosionproof hole 2 has burst disk 3, and described burst disk 3 upper surface flushes with explosionproof hole 2 top, is coated with one deck plastic film 5 bottom described explosionproof hole 2, plastic film material can be PP, PE, PET mono-kind also can be above-mentioned several combination.In the present embodiment, described plastic film 5 is square, and its center is corresponding with explosionproof hole 2 center, and edges cover is on the lower surface of cover plate 1.The thickness of plastic film 5 is generally 0.01mm ~ 2mm, explosionproof hole 2 is determined according to the specification of lithium ion battery, general diameter is 1mm ~ 20mm, and the degree of depth is 0.2mm ~ 10mm, and explosionproof hole 2 and cover plate 1 center distance are generally 2mm ~ 20mm, described burst disk 3 is cylinder, thickness is 1mm, and lithium ion battery cover board 1 diameter of the present embodiment is 50mm, and thickness is 6.5mm, explosionproof hole 2 diameter is 4mm, and the degree of depth is 6.5mm.The diameter of described burst disk 3 is slightly larger than the diameter of explosionproof hole 2, and it can be made closely to be fixed in explosionproof hole 2, and burst disk 3 thickness is 2mm; The length of side of square plastic film 5 is 5mm, and thickness is 1mm.Explosionproof hole 2 and cover plate 1 center distance are 20mm.Described cover plate 1 material is aluminium alloy, and described burst disk 3 material is also aluminium alloy.
Advantage in the utility model is, protective layer can avoid burst disk not break by electrolyte erosion, and in preventing battery from transporting, vibration causes burst disk to break, thus prevents leakage of lithium ion battery.And when burst disk weld has husky hole or micro-crack, protective layer can also available protecting burst disk, prevents battery leakage.
In addition, when inside lithium ion cell short circuit or other reasons cause battery temperature rising to reach 120 degree, this protective layer becomes inefficacy molten condition, and the excessive burst disk of inner pressure of battery is broken, thus cell internal pressure effectively discharges, and guarantees the security performance of battery.With the processing method that product is supporting, add technique simple, the advantage such as with low cost.
Above-mentioned embodiment is used for explaining and the utility model is described; instead of the utility model is limited; the utility model spirit and claim protection range in, any amendment make the utility model and change, all fall into protection range of the present utility model.
Claims (7)
1. a safety valve for lithium ion battery, it is characterized in that: comprise the explosionproof hole be arranged on lithium ion battery cover board, bottom or the top of described explosionproof hole are provided with burst disk, apply/be coated with protective layer bottom described explosionproof hole, the thickness of described protective layer is 0.01mm ~ 2mm, described explosionproof hole diameter is 1 ~ 20mm, and the degree of depth is 0.2 ~ 10mm; Described burst disk is cylinder, and diameter is 1 ~ 20mm, and thickness is 0.01 ~ 10mm.
2. a kind of safety valve for lithium ion battery as claimed in claim 1, it is characterized in that: described protective layer is circular, square or polygon, its center is corresponding with explosionproof hole center, and edges cover is on the lower surface of cover plate.
3. a kind of safety valve for lithium ion battery as claimed in claim 1, it is characterized in that: described burst disk is welded on bottom explosionproof hole, its lower surface flushes with bottom explosionproof hole, is coated with layer protective layer bottom described burst disk, and described protective layer is protection glue-line.
4. a kind of safety valve for lithium ion battery as claimed in claim 1, it is characterized in that: described burst disk is welded on explosionproof hole top, its upper surface flushes with explosionproof hole top, is coated with layer protective layer bottom described explosionproof hole.
5. a kind of safety valve for lithium ion battery as claimed in claim 4, is characterized in that: described protective layer is plastic film, and plastic film is PP film, PE film, the wherein one in PET film.
6. a kind of safety valve for lithium ion battery as claimed in claim 1, is characterized in that: described explosionproof hole and cover plate central spacing are 2mm-20mm.
7. a kind of safety valve for lithium ion battery as claimed in claim 1, is characterized in that: described burst disk material is stainless steel, aluminium alloy, Copper Foil, aluminium foil; Described cover plate material is stainless steel or aluminium alloy.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520743543.2U CN205122672U (en) | 2015-09-24 | 2015-09-24 | Safety valve of lithium ionic cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520743543.2U CN205122672U (en) | 2015-09-24 | 2015-09-24 | Safety valve of lithium ionic cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205122672U true CN205122672U (en) | 2016-03-30 |
Family
ID=55578253
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520743543.2U Expired - Fee Related CN205122672U (en) | 2015-09-24 | 2015-09-24 | Safety valve of lithium ionic cell |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205122672U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
-
2015
- 2015-09-24 CN CN201520743543.2U patent/CN205122672U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105206773A (en) * | 2015-09-24 | 2015-12-30 | 浙江谷神能源科技股份有限公司 | Lithium-ion battery safety valve and machining method thereof |
| CN105206773B (en) * | 2015-09-24 | 2018-03-06 | 浙江谷神能源科技股份有限公司 | A kind of safety valve for lithium ion battery and its processing method |
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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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20210924 |