CN204407392U - Flame-proof battery - Google Patents
Flame-proof battery Download PDFInfo
- Publication number
- CN204407392U CN204407392U CN201520114125.7U CN201520114125U CN204407392U CN 204407392 U CN204407392 U CN 204407392U CN 201520114125 U CN201520114125 U CN 201520114125U CN 204407392 U CN204407392 U CN 204407392U
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- China
- Prior art keywords
- containing cavity
- battery
- copper foil
- metal
- coat
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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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- Finger-Pressure Massage (AREA)
- Sealing Battery Cases Or Jackets (AREA)
Abstract
The utility model relates to a kind of battery, especially relates to a kind of flame-proof battery.This flame-proof battery; comprise naked battery core and outer copper foil; coat of metal is provided with between described naked battery core and outer copper foil; containing cavity is provided with between coat of metal and outer copper foil; outer copper foil inner surface is provided with dielectric film, and coat of metal is provided with unidirectional valve, and containing cavity is communicated with naked battery core by unidirectional valve; the direction of unidirectional valve is by naked battery core towards containing cavity, is filled with the gentle low pressure gas forced down in a standard atmospheric pressure of fire retardant matter in containing cavity.The utility model has can strengthen outside batteries structure, avoid cell deformation, prevented from combustion-supporting gas from entering during acupuncture and slow down electric current increasing, reduce inside battery heat, preventing the beneficial effect such as cells burst and blast at battery.
Description
Technical field
The utility model relates to a kind of battery, especially relates to a kind of flame-proof battery.
Background technology
Existing battery is naked battery core external sheath one deck Copper Foil, and naked battery core is reeled formed by anode, barrier film, negative electrode, has electrolyte in naked battery core.When this kind of battery is under pressure, outer copper foil is easily out of shape, and battery is easily revealed, and causes battery to scrap, and even causes battery spontaneous combustion, blast.When detecting cell safety index, usually adopting needing machine to do pin prick test, utilizing metal needle to run through battery, test battery whether spontaneous combustion or blast.When metal needle is through battery, metal needle contact Copper Foil and naked battery core, cause short circuit, produce larger current, the temperature of metal needle raises, and the structure of existing battery causes heat to discharge, and outside air enters in battery by metal needle perforation, oxygen in air, as combustion-supporting gas, makes battery spontaneous combustion even explode.
Utility model content
The utility model, mainly for the problems referred to above, provides a kind of and can strengthen outside batteries structure, avoids cell deformation, prevented combustion-supporting gas from entering and slow down the flame-proof battery that electric current increases, reduces inside battery heat, prevents cells burst and blast at battery during acupuncture.
The purpose of this utility model is mainly achieved by following proposal: a kind of flame-proof battery; comprise naked battery core and outer copper foil; coat of metal is provided with between described naked battery core and outer copper foil; containing cavity is provided with between coat of metal and outer copper foil; outer copper foil inner surface is provided with dielectric film; coat of metal is provided with unidirectional valve; containing cavity is communicated with naked battery core by unidirectional valve; the direction of unidirectional valve is by naked battery core towards containing cavity, is filled with the gentle low pressure gas forced down in a standard atmospheric pressure of fire retardant matter in containing cavity.Coat of metal is set between naked battery core and outer copper foil, there is between coat of metal and outer copper foil gap and form containing cavity.Be provided with parting bead in containing cavity, parting bead is insulator, can be strengthened the structural strength of outer copper foil and coat of metal by parting bead, and parting bead can support outer copper foil, avoids outer copper foil compressive deformation.In containing cavity, fill fire retardant matter and low-pressure gas, the air pressure of low-pressure gas is lower than a standard atmospheric pressure, and the pressure namely in containing cavity is less than the pressure in naked battery core.After battery uses a period of time, naked battery core inside produces reacted waste gas.Due to coat of metal being provided with unidirectional valve; containing cavity is communicated with naked battery core by unidirectional valve; and the direction of unidirectional valve is towards containing cavity by naked battery core; waste gas in naked battery core enters in the lower containing cavity of air pressure by unidirectional valve; now; containing cavity as container collection waste gas, can be avoided battery bulging, prevents battery explosion.After containing cavity absorbs battery generation waste gas, containing waste gas and fire retardant matter in containing cavity, when battery is subject to acupuncture, acupuncture is through outer copper foil, enter the moment of containing cavity, waste gas in containing cavity and fire retardant matter leak along metal needle simultaneously, effectively prevent the combustion-supporting gases such as air from entering inside battery, prevent battery spontaneous combustion.When metal needle runs through battery; outer copper foil inner surface is provided with dielectric film; outer copper foil, between coat of metal and metal needle formed a current circuit; a current circuit is formed between naked battery core and metal needle; slow down current collection, reduce the temperature amount of increase of metal needle, the fire retardant matter in containing cavity can be followed metal needle and be entered inside battery; can not only cool metal needle, and cells burst and blast can be prevented.Battery is not yielding when normal use, and the fire retardant matter in containing cavity can not cause interference to the use of battery, and the low pressure in containing cavity can absorb in naked battery core and produce waste gas, makes containing cavity as container collection waste gas, avoids battery bulging.When battery sudden huge profits use causes acupuncture, many current circuits slow down current collection, reduce temperature and raise, the combustion-supporting gases such as air can be stoped to enter, prevent battery spontaneous combustion further, make cell safety reliable when fire retardant matter leaks.
As preferably, between coat of metal and naked battery core, be provided with barrier film.
As preferably, the ratio shared by volume shared by fire retardant matter and low-pressure gas between volume is between 0.5:1 to 2:1.Fire retardant matter is used for being subject at battery stoping combustion-supporting gas to enter battery when leaking after the violences such as acupuncture use, and stops the effect of battery spontaneous combustion simultaneously; Low-pressure gas is for reducing the air pressure in containing cavity, the power absorbing waste gas is provided, and a part for volume shared by low-pressure gas is intended for container collection waste gas, the amount of fire retardant matter and the amount of low-pressure gas all have specific function, ratio shared by volume shared by fire retardant matter and low-pressure gas between volume is between 0.5:1 to 2:1, can ensure that battery uses the waste gas produced when 10,000 times can obtain the absorption of containing cavity, and battery is subject to acupuncture when leaking, fire retardant matter slowly can leak all the time and organize cells burst.
As preferably, described low-pressure gas is thin nitrogen.Low-pressure gas is thin nitrogen; thin nitrogen can reduce the air pressure in containing cavity; be convenient to waste gas and suck; simultaneously nitrogen can be fire-retardant; when battery be subject to acupuncture leak time; nitrogen can be followed fire retardant matter and together be leaked, and stops the combustion-supporting gases such as air to enter battery, prevents battery spontaneous combustion further.
As preferably, fire retardant matter is dry powder or sodium-chloride water solution.Fire retardant matter can be dry powder, and when acupuncture runs through, dry powder can be fire-retardant, even extinguishes naked light in the moment producing fragmentary Mars.Fire retardant matter can also to be sodium-chloride water solution, and sodium-chloride water solution can be attached on metal needle when metal needle passes, and to metal needle cooling, can play effect that is fire-retardant and extinguishing naked light simultaneously.
As preferably, the two ends up and down of coat of metal are provided with unidirectional valve.The two ends up and down of coat of metal are provided with unidirectional valve, and no matter anode is at upper or negative pole upper, and no matter fire retardant matter sinks to the bottom still swims in lower, at least ensures have a unidirectional valve not blocked between containing cavity and naked battery core.
Therefore, flame-proof battery of the present utility model possesses following advantage: 1, between naked battery core and outer copper foil, arrange coat of metal, there is between coat of metal and outer copper foil gap and form containing cavity, parting bead is provided with in containing cavity, parting bead is insulator, can be strengthened the structural strength of outer copper foil and coat of metal by parting bead, parting bead can support outer copper foil, avoids outer copper foil compressive deformation, 2, fire retardant matter and low-pressure gas is filled in containing cavity, the air pressure of low-pressure gas is lower than a standard atmospheric pressure, namely the pressure in containing cavity is less than the pressure in naked battery core, after battery uses a period of time, naked battery core inside produces reacted waste gas, due to coat of metal being provided with unidirectional valve, containing cavity is communicated with naked battery core by unidirectional valve, and the direction of unidirectional valve is towards containing cavity by naked battery core, waste gas in naked battery core enters in the lower containing cavity of air pressure by unidirectional valve, now, containing cavity can as container collection waste gas, avoid battery bulging, prevent battery explosion, after containing cavity absorbs battery generation waste gas, containing waste gas and fire retardant matter in containing cavity, when battery is subject to acupuncture, acupuncture is through outer copper foil, enter the moment of containing cavity, waste gas in containing cavity and fire retardant matter leak along metal needle simultaneously, effectively prevent the combustion-supporting gases such as air from entering inside battery, prevent battery spontaneous combustion, 3, when metal needle runs through battery, outer copper foil inner surface is provided with dielectric film, outer copper foil, between coat of metal and metal needle formed a current circuit, a current circuit is formed between naked battery core and metal needle, slow down current collection, reduce the temperature amount of increase of metal needle, the fire retardant matter in containing cavity can be followed metal needle and be entered inside battery, can not only cool metal needle, and cells burst and blast can be prevented.
Accompanying drawing explanation
Accompanying drawing 1 is a kind of fragmentary sectional view of the present utility model;
Accompanying drawing 2 is cross sectional representation of the present utility model;
Accompanying drawing 3 is A place partial enlarged drawings in accompanying drawing 1;
Accompanying drawing 4 is the utility model structural representations under pin prick test state;
Accompanying drawing 5 is the partial enlarged drawings under pin prick test state.
Illustrate: the naked battery core of 01-, 011-negative electrode, 012-anode, 013-barrier film, 02-coat of metal, 03-barrier film, 04-outer copper foil, 05-containing cavity, 06-fire retardant matter, 07-parting bead, 08-unidirectional valve, 09-metal needle.
Embodiment
Below by embodiment, and by reference to the accompanying drawings, the technical solution of the utility model is described in further detail.
Embodiment 1: as shown in Figure 1, 2, 3, a kind of flame-proof battery, comprises naked battery core 01 and outer copper foil 04, and naked battery core is reeled formed by negative electrode 011, spacer 013, anode 012.Be provided with coat of metal 02 between naked battery core and outer copper foil, between coat of metal and naked battery core, be provided with barrier film 03.Between coat of metal and outer copper foil, interval arranges and forms containing cavity 05, and be provided with parting bead 07 in containing cavity, parting bead is insulator, and parting bead to be centered around in containing cavity and in the shape of a spiral by containing cavity interval helically cavity.Parting bead thickness is 2.5 times of outer copper foil thickness, and the axial distance between adjacent two layers parting bead is 2 times of parting bead thickness.Outer copper foil inner surface is provided with dielectric film, and the side of parting bead and dielectric film are fitted, opposite side and coat of metal outer surface are fitted.The two ends up and down of coat of metal sidewall are provided with unidirectional valve 08; containing cavity is communicated with naked battery core by unidirectional valve; the direction of unidirectional valve is by naked battery core towards containing cavity, is filled with the gentle low-pressure gas forced down in a standard atmospheric pressure of fire retardant matter 06 in containing cavity.Fire retardant matter is dry powder, and low-pressure gas is thin nitrogen.Ratio shared by volume shared by fire retardant matter and low-pressure gas between volume is 1:1.
Coat of metal is set between naked battery core and outer copper foil, there is between coat of metal and outer copper foil gap and form containing cavity.Be provided with parting bead in containing cavity, parting bead is insulator, can be strengthened the structural strength of outer copper foil and coat of metal by parting bead, and parting bead can support outer copper foil, avoids outer copper foil compressive deformation.In containing cavity, fill fire retardant matter and low-pressure gas, the air pressure of low-pressure gas is lower than a standard atmospheric pressure, and the pressure namely in containing cavity is less than the pressure in naked battery core.After battery uses a period of time, naked battery core inside produces reacted waste gas.Due to coat of metal being provided with unidirectional valve; containing cavity is communicated with naked battery core by unidirectional valve; and the direction of unidirectional valve is towards containing cavity by naked battery core; waste gas in naked battery core enters in the lower containing cavity of air pressure by unidirectional valve; now; containing cavity as container collection waste gas, can be avoided battery bulging, prevents battery explosion.After containing cavity absorbs battery generation waste gas, containing waste gas and fire retardant matter in containing cavity, when battery is subject to acupuncture, as shown in Figure 4,5, acupuncture, through outer copper foil, enters the moment of containing cavity, and the waste gas in containing cavity and fire retardant matter leak along metal needle 09 simultaneously, effectively prevent the combustion-supporting gases such as air from entering inside battery, prevent battery spontaneous combustion.When metal needle runs through battery; outer copper foil inner surface is provided with dielectric film; outer copper foil, between coat of metal and metal needle formed a current circuit; a current circuit is formed between naked battery core and metal needle; slow down current collection, reduce the temperature amount of increase of metal needle, the fire retardant matter in containing cavity can be followed metal needle and be entered inside battery; can not only cool metal needle, and cells burst and blast can be prevented.Battery is not yielding when normal use, and the fire retardant matter in containing cavity can not cause interference to the use of battery, and the low pressure in containing cavity can absorb in naked battery core and produce waste gas, makes containing cavity as container collection waste gas, avoids battery bulging.When battery sudden huge profits use causes acupuncture, many current circuits slow down current collection, reduce temperature and raise, the combustion-supporting gases such as air can be stoped to enter, prevent battery spontaneous combustion further, make cell safety reliable when fire retardant matter leaks.Parting bead is centered around in containing cavity in the shape of a spiral, and spiral helicine parting bead can support outer copper foil, makes outer copper foil keep coaxial with coat of metal all the time, avoids cell deformation.When outer copper foil is pierced, waste gas in containing cavity and fire retardant matter leak, spiral helicine containing cavity can increase the path of fire retardant matter and waste gas movement, and then control outer discharge, fire retardant matter is slowly flowed out, extends the time that fire retardant matter leaks, and then extend the time intercepting air and enter, after ensureing that metal needle runs through battery completely, fire retardant matter still can be had to leak out and intercept combustion-supporting gas and enter, prevent cells burst.The excessive containing cavity volume that easily causes of parting bead thickness is excessively taken, under guarantee containing cavity volume obtains the condition of Appropriate application, parting bead thickness is 2.5 times of outer copper foil thickness, the contact area of parting bead and outer copper foil can be increased, and then strengthen parting bead to the support of outer copper foil, avoid parting bead flexural deformation simultaneously.Parting bead around the number of turns more, the volume that containing cavity is taken by parting bead is larger, and under guarantee containing cavity volume obtains the condition of Appropriate application, the axial distance between adjacent two layers parting bead is 2.5 times of parting bead thickness, can strengthen the support of parting bead to outer copper foil.Fire retardant matter is used for being subject at battery stoping combustion-supporting gas to enter battery when leaking after the violences such as acupuncture use, and stops the effect of battery spontaneous combustion simultaneously; Low-pressure gas is for reducing the air pressure in containing cavity, the power absorbing waste gas is provided, and a part for volume shared by low-pressure gas is intended for container collection waste gas, the amount of fire retardant matter and the amount of low-pressure gas all have specific function, ratio shared by volume shared by fire retardant matter and low-pressure gas between volume is 1:1, can ensure that battery uses the waste gas produced when 10,000 times can obtain the absorption of containing cavity, and battery is subject to acupuncture when leaking, fire retardant matter slowly can leak all the time and organize cells burst.Low-pressure gas is thin nitrogen; thin nitrogen can reduce the air pressure in containing cavity; be convenient to waste gas and suck; simultaneously nitrogen can be fire-retardant; when battery be subject to acupuncture leak time; nitrogen can be followed fire retardant matter and together be leaked, and stops the combustion-supporting gases such as air to enter battery, prevents battery spontaneous combustion further.Fire retardant matter can be dry powder, and when acupuncture runs through, dry powder can be fire-retardant, even extinguishes naked light in the moment producing fragmentary Mars.The two ends up and down of coat of metal are provided with unidirectional valve, and no matter anode is at upper or negative pole upper, and no matter fire retardant matter sinks to the bottom still swims in lower, at least ensures have a unidirectional valve not blocked between containing cavity and naked battery core.
Should be understood that this embodiment is only not used in restriction scope of the present utility model for illustration of the utility model.In addition should be understood that those skilled in the art can make various changes or modifications the utility model, and these equivalent form of values fall within the application's appended claims limited range equally after the content of having read the utility model instruction.
Claims (6)
1. a flame-proof battery; comprise naked battery core and outer copper foil; it is characterized in that; be provided with coat of metal between described naked battery core and outer copper foil, be provided with containing cavity between coat of metal and outer copper foil, outer copper foil inner surface is provided with dielectric film; coat of metal is provided with unidirectional valve; containing cavity is communicated with naked battery core by unidirectional valve, and the direction of unidirectional valve is by naked battery core towards containing cavity, is filled with the gentle low-pressure gas forced down in a standard atmospheric pressure of fire retardant matter in containing cavity.
2. flame-proof battery according to claim 1, is characterized in that, is provided with barrier film between coat of metal and naked battery core.
3. flame-proof battery according to claim 1, is characterized in that, the ratio shared by volume shared by fire retardant matter and low-pressure gas between volume is between 0.5:1 to 2:1.
4. flame-proof battery according to claim 1, is characterized in that, described low-pressure gas is thin nitrogen.
5. the flame-proof battery according to claim 1 or 2 or 3 or 4, it is characterized in that, fire retardant matter is dry powder or sodium-chloride water solution.
6. the flame-proof battery according to claim 1 or 2 or 3 or 4, it is characterized in that, the two ends up and down of coat of metal are provided with unidirectional valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114125.7U CN204407392U (en) | 2015-02-16 | 2015-02-16 | Flame-proof battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520114125.7U CN204407392U (en) | 2015-02-16 | 2015-02-16 | Flame-proof battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204407392U true CN204407392U (en) | 2015-06-17 |
Family
ID=53431229
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520114125.7U Expired - Fee Related CN204407392U (en) | 2015-02-16 | 2015-02-16 | Flame-proof battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204407392U (en) |
-
2015
- 2015-02-16 CN CN201520114125.7U patent/CN204407392U/en not_active Expired - Fee Related
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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 | ||
| CP03 | Change of name, title or address |
Address after: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang District, No. two road, building No. 855, No. Patentee after: Wanxiang 123 Co Ltd Patentee after: Wanxiang Group Corporation Address before: 311215 Xiaoshan economic and Technological Development Zone, Zhejiang, No. two road, building No. 118, No. Patentee before: Universal A 1 System Co., Ltd Patentee before: Wanxiang Group Corporation |
|
| 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: 20150617 Termination date: 20210216 |