CN207834423U - A kind of lithium battery explosion-proof casing - Google Patents
A kind of lithium battery explosion-proof casing Download PDFInfo
- Publication number
- CN207834423U CN207834423U CN201820020600.8U CN201820020600U CN207834423U CN 207834423 U CN207834423 U CN 207834423U CN 201820020600 U CN201820020600 U CN 201820020600U CN 207834423 U CN207834423 U CN 207834423U
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- China
- Prior art keywords
- battery
- hole
- explosion
- hot melt
- battery case
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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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- Battery Mounting, Suspending (AREA)
- Secondary Cells (AREA)
- Gas Exhaust Devices For Batteries (AREA)
Abstract
The utility model is related to a kind of lithium battery explosion-proof casings.The through-hole being in communication with the outside is offered on the battery case, and the hot melt material melted in specified for temperature ranges is filled in the through-hole.As shown from the above technical solution; the utility model on battery case by opening up through-hole; hot melt material is filled in through-hole; when thermal runaway occurs for inside battery; before temperature and internal pressure in battery case drastically increase to explosion limit, the hot melt material in through-hole can melt, and cause inside battery air pressure reduction; the danger for avoiding battery explosion, to protect the person and property safety.
Description
Technical field
The utility model is related to field of lithium, and in particular to a kind of lithium battery explosion-proof casing.
Background technology
The safety of power battery is the hot spot being concerned in new-energy automobile development.Current driving force battery loses according to statistics
Effect, main cause is that thermal runaway phenomenon has occurred in inside.For electrokinetic cell system, battery pack usually has high-energy close
The characteristics of degree, structure design compact in design, and because of shared finite volume, cause radiator relatively poor, it is more prone to cause
The accumulation of heat.In addition, since numerous single battery core present positions inside battery pack are different, heat conduction and radiating condition are not yet
Together, cause in battery module and battery pack that temperature distribution is non-uniform for single battery, to influence the consistency of single battery.Electricity
Environment temperature inhomogeneities residing for core is bigger, is more also easy to produce thermal runaway.
Lithium ion battery optimum working temperature is 20-30 DEG C, when the operating temperature of lithium ion battery is less than 0 DEG C, is easy
There is the phenomenon that charging analysis lithium or electric discharge drop power；When the temperature of lithium ion battery is more than 45 DEG C, the cycle of lithium ion battery
Service life can drastically decline, but also it is possible that thermal runaway problem.And existing market is to the building ring of lithium-ion-power cell
Border temperature requirement is between -30-50 DEG C, in non-optimal operating temperature range, will produce during lithium ion battery use big
The heat of amount.According to GB 3836.2-2010《Explosive atmosphere part 2：The equipment protected by flameproof enclosure " d "》Standard
Requirement, pressure is respectively 1.5MPa（II B class flame proofs）、2.0 MPa（II C class flame proofs）, pressing time is at least 10 s.But
It is that the conventional thickness for using explosion-resistant enclosure is usually no more than 6mm, to ensure the safety of explosion-resistant enclosure, can passes through and increase shell thickness
Degree（More than 10 mm）Mode, but so design certainly will increase the quality of shell, both uneconomical or unreasonable, be unfavorable for reducing
Electrokinetic cell system energy density per unit volume and gravimetric specific energy.In addition, traditional consumer lithium battery is preventing battery from crossing thermal explosion
Processing method be in anode addition one PTC current limliting electronic component, the generation of larger operating current is avoided, to control
The explosion generated by overheat.And the operating condition of novel power battery is often transported under the conditions of high current is high-power
Row, is further increased the incidence of thermal runaway.
At this stage in order to make power battery that there is good security performance when in use, can generally install on the shell explosion-proof
Valve gear.When battery because of unexpected reason, when inner pressure of battery being caused to increase, device starts, and vented gasses to reduce in time
Inner pressure of battery.But for electrokinetic cell system, occur thermal runaway when, enclosure interior will produce a large amount of high temperature, it is thick,
Corrosivity gas, liquid, solid body mixture, explosion-proof valve can be blocked substantially, and to lose the function of pressure release, shell is difficult to bear battery
Internal pressure causes damages to generate explosion.
Utility model content
The purpose of this utility model is to provide a kind of lithium battery explosion-proof casing, which passes through to single battery core shell temperature
The induction of degree achievees the purpose that reduce inner pressure of battery to the corresponding response of triggering.
To achieve the above object, the utility model uses following technical scheme：Offered on the battery case with
The through-hole of external world's connection, the through-hole are interior filled with the hot melt material melted in specified for temperature ranges.
The hot melt material includes metal material or alloy material or high molecular material.
The through-hole is arranged in the top of battery case and/or bottom and/or along the circumferentially disposed of battery case.
The area of the through-hole is 0.5mm2~5cm2。
The quantity setting of the through-hole is one or more.
As shown from the above technical solution, the utility model fills hot melt by opening up through-hole on battery case in through-hole
Material, when thermal runaway occurs for inside battery, before the temperature and internal pressure in battery case drastically increase to explosion limit, in through-hole
Hot melt material can melt, and cause inside battery air pressure reduction, avoid the danger of battery explosion, to protect the person and property peace
Entirely.
Description of the drawings
Fig. 1 is the structural schematic diagram of the utility model embodiment one；
Fig. 2 is the structural schematic diagram of the utility model embodiment two.
Specific implementation mode
The utility model is described further below in conjunction with the accompanying drawings：
A kind of lithium battery explosion-proof casing as shown in Figure 1 and Figure 2, including battery case 1, offer on battery case 1 with outside
The through-hole 2 of boundary's connection, through-hole 2 are interior filled with the hot melt material 3 melted in specified for temperature ranges.Specifically, existing
Through-hole 2 is offered on battery case 1, through-hole 2 is connected with ambient atmosphere, and hot melt material is filled in through-hole 2, when generation thermal runaway
When, hot melt material fusing to make inside battery be communicated with the outside, achievees the purpose that pressure release.Hot melt material can exist according to design
It is melted within the scope of specified temperature, as melted in the range of 100 DEG C~500 DEG C.Simultaneously as the size of through-hole and
Quantity can design, so the hot melt material 3 in through-hole 2 can't be to intensity and heat transfer that battery case 1 should normally be kept
Therefore the normal work of battery can be kept by generating too much influence.
Further, hot melt material 3 includes metal material or alloy material or high molecular material.
Further, through-hole 2 is arranged in the top of battery case 1 and/or bottom and/or is set along the circumferential direction of battery case
It sets.As shown in Figure 1, being directed to rectangular cell, top, bottom, four sides or combinations of the above may be provided at.As shown in Fig. 2, needle
To cylindrical battery, top, bottom, circumferential direction or combinations of the above may be provided at.
Further, the area of through-hole 2 is 0.5mm2~5cm2, the quantity setting one or more of through-hole 2.
The operation principle of the utility model is as follows：
Under lithium battery normal operating conditions, inside battery air pressure, temperature are normal, the hot melt material filled in through-hole 2 at this time
The body of material 3 remains unchanged.When battery because being squeezed, colliding, internal short-circuit, super-charge super-discharge etc. cause inside battery failure
When, violent chemical reaction occurs for inside battery, and internal temperature of battery increases, and generates a large amount of heat, leads to 1 temperature of battery case
It increases, the hot melt material 3 inside through-hole 2 melts at this time, to cause through-hole 2 to open so that the gas of inside battery is due to interior
External differential and leak, reduce internal pressure, avoid the risk of explosion, ensured the safety of battery pack system.In addition, working as battery
When thermal runaway occurs for some internal battery core of packet, since heat is transmitted to adjacent battery core, adjacent battery core temperature increases, and heats material
Material fusing plays the purpose for slowing down thermal runaway harm, it is ensured that entire battery system so as to avoid the further expansion of explosion
Safety.
In conclusion the utility model fills hot melt material in through-hole, works as battery by opening up through-hole on battery case
When the processes such as short circuit occurred inside, super-charge super-discharge cause thermal runaway, battery case body temperature, which increases, generates bulk gas, releases
A large amount of heat, makes the temperature of battery and internal pressure sharply increase, and the utility model can be felt before gas pressure buildup to explosion limit
The raising of battery temperature should be arrived, so that the hot melt material fusing filled in shell, makes inside battery air pressure reduction, avoid
The danger of battery explosion, to protect the person and property safety.The utility model is simple in structure, is ensureing battery system safety
On the basis of, the volume weight of battery pack system will not be increased, the energy density of battery system will not equally be had an impact.
Embodiment described above is only that preferred embodiments of the present invention are described, not to this practicality
Novel range is defined, and under the premise of not departing from the spirit of the design of the utility model, those of ordinary skill in the art are to this
The various modifications and improvement that the technical solution of utility model is made should all fall into the protection of the utility model claims book determination
In range.
Claims (5)
1. a kind of lithium battery explosion-proof casing, including battery case（1）, it is characterised in that：The battery case（1）On offer
The through-hole being in communication with the outside（2）, the through-hole（2）It is interior filled with the hot melt material melted in specified for temperature ranges（3）.
2. lithium battery explosion-proof casing according to claim 1, it is characterised in that：The hot melt material（3）Including metal
Material or alloy material or high molecular material.
3. lithium battery explosion-proof casing according to claim 1, it is characterised in that：The through-hole（2）It is arranged in battery case
Body（1）Top and/or bottom and/or along the circumferentially disposed of battery case.
4. lithium battery explosion-proof casing according to claim 1 or 3, it is characterised in that：The through-hole（2）Area be
0.5mm2~5cm2。
5. lithium battery explosion-proof casing according to claim 4, it is characterised in that：The through-hole（2）Quantity be arranged one
Or it is multiple.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020600.8U CN207834423U (en) | 2018-01-07 | 2018-01-07 | A kind of lithium battery explosion-proof casing |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820020600.8U CN207834423U (en) | 2018-01-07 | 2018-01-07 | A kind of lithium battery explosion-proof casing |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207834423U true CN207834423U (en) | 2018-09-07 |
Family
ID=63391865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820020600.8U Active CN207834423U (en) | 2018-01-07 | 2018-01-07 | A kind of lithium battery explosion-proof casing |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207834423U (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904354A (en) * | 2019-02-28 | 2019-06-18 | 珠海格力电器股份有限公司 | The battery case and battery of internal short-circuit of battery are solved the problems, such as using dielectric |
| WO2020224016A1 (en) * | 2019-05-07 | 2020-11-12 | 国网江苏省电力有限公司电力科学研究院 | Novel lithium ion battery and battery module |
| CN113078385A (en) * | 2021-03-25 | 2021-07-06 | 胡定灏 | Method for arranging fusible plug on shell of power battery |
| CN113131083A (en) * | 2021-03-30 | 2021-07-16 | 宁德新能源科技有限公司 | Battery cell, sealing plug and power utilization device |
| CN113140827A (en) * | 2021-04-19 | 2021-07-20 | 胡定灏 | Power battery coolant common rail technology |
| WO2022000556A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Button battery |
| WO2022000545A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Button cell |
| WO2022105140A1 (en) * | 2020-11-19 | 2022-05-27 | 常州瑞德丰精密技术有限公司 | Secondary battery top cover assembly and secondary battery |
-
2018
- 2018-01-07 CN CN201820020600.8U patent/CN207834423U/en active Active
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109904354B (en) * | 2019-02-28 | 2024-03-22 | 珠海格力电器股份有限公司 | Battery case and battery for solving internal short circuit problem of battery by using insulating liquid |
| CN109904354A (en) * | 2019-02-28 | 2019-06-18 | 珠海格力电器股份有限公司 | The battery case and battery of internal short-circuit of battery are solved the problems, such as using dielectric |
| JP2021525434A (en) * | 2019-05-07 | 2021-09-24 | 国网江蘇省電力有限公司電力科学研究院 | New lithium-ion battery and battery module |
| WO2020224016A1 (en) * | 2019-05-07 | 2020-11-12 | 国网江苏省电力有限公司电力科学研究院 | Novel lithium ion battery and battery module |
| JP7095099B2 (en) | 2019-05-07 | 2022-07-04 | 国网江蘇省電力有限公司電力科学研究院 | New lithium-ion battery module |
| WO2022000556A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Button battery |
| WO2022000545A1 (en) * | 2020-06-30 | 2022-01-06 | 瑞声声学科技(深圳)有限公司 | Button cell |
| WO2022105140A1 (en) * | 2020-11-19 | 2022-05-27 | 常州瑞德丰精密技术有限公司 | Secondary battery top cover assembly and secondary battery |
| WO2022198347A1 (en) * | 2021-03-25 | 2022-09-29 | 胡定灏 | Method for providing fusible plug on housing of power battery |
| CN113078385A (en) * | 2021-03-25 | 2021-07-06 | 胡定灏 | Method for arranging fusible plug on shell of power battery |
| CN113131083A (en) * | 2021-03-30 | 2021-07-16 | 宁德新能源科技有限公司 | Battery cell, sealing plug and power utilization device |
| CN113131083B (en) * | 2021-03-30 | 2023-10-13 | 宁德新能源科技有限公司 | Battery cell, sealing plug and electricity utilization device |
| CN113140827A (en) * | 2021-04-19 | 2021-07-20 | 胡定灏 | Power battery coolant common rail technology |
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