CN208674220U - A kind of flame-proof battery - Google Patents
A kind of flame-proof battery Download PDFInfo
- Publication number
- CN208674220U CN208674220U CN201821452226.5U CN201821452226U CN208674220U CN 208674220 U CN208674220 U CN 208674220U CN 201821452226 U CN201821452226 U CN 201821452226U CN 208674220 U CN208674220 U CN 208674220U
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- Prior art keywords
- shell
- battery core
- control valve
- heat
- flame
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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 provides a kind of flame-proof battery, belongs to battery technology field.It solves the problems, such as that existing flame-proof battery safety coefficient is low.This flame-proof battery includes shell and is placed in the intracorporal battery core of shell, fire-retardant medium is equipped between shell and battery core, battery core is equipped with the first pressure control valve for controlling fire-retardant medium, when air pressure inside battery core is greater than the air pressure between shell and battery core, fire-retardant medium can be conducted to inside battery core by first pressure control valve.This flame-proof battery has the advantages that safety coefficient is high.
Description
Technical field
The utility model belongs to battery technology field, is related to a kind of lithium battery, in particular to a kind of flame-proof battery.
Background technique
Lithium battery is a kind of outstanding energy-storage travelling wave tube, is negative electrode material, is used non-aqueous solution electrolysis by lithium metal or lithium alloy
The battery of matter solution, in recent years, as low-carbon environment-friendly theory is rooted in the hearts of the people, lithium battery is because of its light weight, voltage is high, it is small in size with
And many advantages, such as environmental-friendly, so that lithium battery starts to popularize in each field.But lithium is that a kind of chemical property is very active
Metallic element, and the performance of its medium electrolyte is unstable, so that lithium battery performance is unstable, when short circuit occurs for battery
When, thermal runaway can occur for inside battery, and heat build-up causes internal temperature of battery to rise, and cell internal pressure increases, and then leads
Cause lithium battery that the danger such as burning, explosion easily occur, causing lithium battery, there are security risks.
For security risk existing for above-mentioned lithium battery, each lithium battery manufacturer improves lithium battery, such as in
State's Patent document data discloses a kind of lithium battery explosion-proof flame-retardant structure [patent No.: 201710669608.7；Application publication number:
CN107425222A], including shell and several lithium battery packs of installation inside the shell are installed, interior of shell is equipped with will be several
The fire extinguishing layer that a lithium battery pack wraps, fire extinguishing layer include wrapping up the isolation pocket of liquid fire retardant.
The lithium battery explosion-proof flame-retardant structure can prevent battery from burning away.When the flame-proof explosion-proof battery short circuit, lithium electricity
Pond packet internal-combustion, the ignition temperature only inside lithium battery pack are transferred to external and external after burnt broken hole, liquid resistance
Combustion agent can be entered by broken hole inside lithium battery pack or lithium battery pack electrolyte inside is flowed out by broken hole, and then prevents electricity
Pond burns away, and still, after the zero temperature circle point that lithium battery pack internal-combustion is able to bear to it, will directly occur quick-fried
Fried, so that fire retardant does not play effect fire-retardant in time, leading to the lithium battery explosion-proof flame-retardant structure, there are still security risks.
Summary of the invention
The purpose of this utility model is to propose a kind of flame-proof battery for the above-mentioned problems in the prior art, is solved
Certainly the technical issues of is the safety coefficient for how improving flame-proof battery.
The purpose of this utility model can be realized by the following technical scheme: a kind of flame-proof battery, including shell and set
In the intracorporal battery core of shell, fire-retardant medium is equipped between the shell and battery core, which is characterized in that the battery core is equipped with for controlling
The first pressure control valve for making fire-retardant medium, when the air pressure inside the battery core is greater than the air pressure between shell and battery core, institute
Stating fire-retardant medium can be conducted to inside battery core by first pressure control valve.
In the prior art since fire-retardant medium can not timely enter inside battery core, on the one hand lead to battery core internal-combustion
It directly exploding after to critical-temperature, pernicious gas produced by another aspect inside battery sustained combustion can also be conducted to the external world, into
And pollute environment.The fire-retardant medium of the application can be entered inside battery core by first pressure control valve valve port, first pressure
The opening and closing of control valve valve port is controlled by gas pressure, and the principle of this flame-proof battery is: in this flame-proof battery production process, being led to
The air extracted between shell and battery core is crossed, so that the air pressure between shell and battery core is suitable with the air pressure inside battery core, when this
When short circuit occurs for flame-proof battery, battery core internal temperature is increased, so that battery core internal gas molecular motion velocities become larger and to battery core
The impact of inner wall also becomes larger, so that the air pressure inside battery core is greater than air pressure between shell and battery core, first pressure at this time
The valve port of control valve is opened, so that fire-retardant medium is entered directly into inside battery core by first pressure control valve and and inside battery
Electrolyte mixing, to prevent battery core internal-combustion, meanwhile, by the pressure value of reasonable set first pressure control valve so that
Fire-retardant medium can timely enter inside battery core, to prevent from starting inside battery core burning, and then improve the safety of flame-proof battery
Coefficient.
There is the storage for storing fire-retardant medium in a kind of above-mentioned flame-proof battery, between the shell and battery core
The inside of chamber, the battery core is connected by first pressure control valve with the bottom of storage chamber.Storage chamber make shell and battery core it
Between have dedicated for storing the chamber of fire-retardant medium, since the setting of fire-retardant medium is in order to can when short circuit occurs for battery
Battery core internal ignition resistant is timely entered, the distance between inside the setting position shortening fire-retardant medium to battery core of this fire-retardant medium,
Meanwhile when the short circuit of this flame-proof battery, the conduction position of first pressure control valve enables the fire-retardant medium in storage chamber complete
Portion enters inside battery core and is sufficiently mixed with the electrolyte of inside battery, so that fire-retardant medium is fully utilized, to mention
The safety coefficient of high resistant fuel cell.
In a kind of above-mentioned flame-proof battery, the shell is equipped with second pressure control valve, and the storage chamber passes through the
Two pressure-control valves can be connected with hull outside, and the cracking pressure of the second pressure control valve is greater than first pressure control valve
Cracking pressure.Second pressure control valve can play secondary fire-retardant effect to flame-proof battery, if fire-retardant medium with battery
Internal electrolyte mixing, and the air pressure inside battery core continues to increase, second pressure control valve valve port is opened at this time, so that electric
Core inner can be discharged excessive air pressure to hull outside by second pressure control valve valve port, prevent battery core internal-combustion,
To further increase the safety coefficient of flame-proof battery.
In a kind of above-mentioned flame-proof battery, the outside of the shell passes through the top of second pressure control valve and storage chamber
Conducting.Gas temperature inside battery short circuit back casing increases, and the effect of second pressure control valve is exactly by mistake inside battery core
More gases are expelled to hull outside, and since battery core internal temperature is high, and high-temperature gas density is small, and then the gas of enclosure interior
It is risen towards case top, the setting position of second pressure control valve is consistent with enclosure interior gas rise direction, and then accelerates gas
The velocity of discharge of body, meanwhile, second pressure control valve setting aloft and first pressure control valve be arranged in lower, which keeps away
Exempt from the mixing liquid that fire-retardant medium and electrolyte mix to flow out from second pressure control valve valve port, to further improve resistance
The safety coefficient of fuel cell.
In a kind of above-mentioned flame-proof battery, the quantity of the first pressure control valve and the number of second pressure control valve
Amount is two.On the one hand the setting of two first pressure control valves improves the air pressure control inside air pressure and battery core in storage chamber
Accuracy processed, on the other hand when flame-proof battery short circuit, fire-retardant medium can be entered inside battery core by multiple valve ports, be improved
Fire-retardant medium enters the speed inside battery core, the arrangement principle of two second pressure control valves and the arrangement of first pressure control valve
Principle is identical, makes the structural integrity of flame-proof battery high while to improve flame-proof battery safety coefficient.
In a kind of above-mentioned flame-proof battery, between the shell and battery core be equipped with for heat transfer the first heat-conducting piece with
And second heat-conducting piece, first heat-conducting piece are located at the bottom of shell, and second heat-conducting piece is located at the top of shell, and described
One heat-conducting piece and the second heat-conducting piece recline battery core, and the storage chamber is thermally conductive by shell, the first heat-conducting piece, battery core and second
Part is enclosed.Due to mutually reclining between shell, the first heat-conducting piece, battery core and the second heat-conducting piece, on the one hand which makes
On the other hand the air-tightness that obtaining storage chamber has had avoids fire-retardant medium direct so that fire-retardant media storage stability is good
It is contacted with housing bottom or top contacts, and then avoid battery bulge, to improve the safety coefficient of flame-proof battery.
In a kind of above-mentioned flame-proof battery, first heat-conducting piece and the second heat-conducting piece are cylindrical in shape, and described first
Heat-conducting piece reclines housing bottom far from one end of storage chamber, and the one end of second heat-conducting piece far from storage chamber and case top are flat
Together.Tubular structure wraps up the first heat-conducting piece and the second heat-conducting piece to battery core, simultaneously as the first heat-conducting piece
One end and the second heat-conducting piece one end be storage chamber cavity wall, and the first heat-conducting piece and the second heat-conducting piece to shell with
Region between battery core in addition to storage chamber is filled, and improves the air-tightness of storage chamber, so that the pressure in storage chamber is stablized
And it is suitable with battery core internal pressure, and then improve the safety coefficient of flame-proof battery.
In a kind of above-mentioned flame-proof battery, the shell, the first heat-conducting piece, battery core and the second heat-conducting piece are by anti-corrosion
The metal material of erosion is made.Since fire-retardant medium has corrosivity, on the one hand this kind of material avoids shell, the first heat-conducting piece, electricity
Core and the second heat-conducting piece are corroded by fire-retardant medium, on the other hand make shell, the first heat-conducting piece, battery core and second thermally conductive
The heating conduction that part has had enables heat caused by battery core inside quickly to pass out hull outside, to improve resistance
The service life of flame-proof battery is improved while the safety coefficient of fuel cell.
In a kind of above-mentioned flame-proof battery, the liquid injection hole for being connected to storage chamber, and institute are offered on the housing exterior walls
Liquid injection hole is stated to be located at the top of first pressure control valve and be located at the lower section of second pressure control valve.On the one hand liquid injection hole opens up
Fire-retardant medium is conveniently entered in storage chamber, the gas in storage chamber is on the other hand enabled easily to be taken out
Take out, liquid injection hole be positioned so that liquid injection hole by storage chamber gas pressure and fluid pressure it is moderate, when battery is short
Lu Shi avoids the mixing liquid flowed out by first pressure control valve from directly impacting liquid injection hole, so that the structure of flame-proof battery
Connection and reasonable arrangement.
In a kind of above-mentioned flame-proof battery, the closeouts for blocking liquid injection hole are equipped in the liquid injection hole, it is described
By being welded and fixed between closeouts and liquid injection hole aperture.After closeouts block liquid injection hole, fire-retardant medium is sealed in liquid injection hole
It is interior, make closeouts fixed by welding, improve closeouts to the leakproofness of liquid injection hole, avoid fire-retardant medium by
It is leaked out in liquid injection hole, and then improves the safety coefficient of flame-proof battery.
Compared with prior art, a kind of flame-proof battery provided by the utility model has the advantage that
1, when short circuit occurs for this flame-proof battery, the air pressure inside battery core can be greater than the air pressure between shell and battery core, this
When first pressure control valve valve port open so that fire-retardant medium by first pressure control valve enter directly into battery core inside and
It is mixed with the electrolyte of inside battery, prevents battery core internal-combustion, meanwhile, pass through the pressure of reasonable set first pressure control valve
Value, enables fire-retardant medium to timely enter inside battery core, to prevent from starting inside battery core burning, improves the peace of flame-proof battery
Overall coefficient.
2, when short circuit occurs for flame-proof battery, fire-retardant medium is mixed with the electrolyte of inside battery, and inside battery core
Air pressure continues to increase, and second pressure control valve valve port is opened at this time, so that the excessive air pressure inside battery core passes through the second pressure
Force control valve valve port is discharged to hull outside, prevents battery core internal-combustion, to further increase the safety coefficient of flame-proof battery.
3, shell, the first heat-conducting piece, battery core and the second heat-conducting piece are enclosed storage chamber, avoid filling out because of fire-retardant medium
Fill and lead to flame-proof battery bulge, meanwhile, the first heat-conducting piece and the second heat-conducting piece by between shell and battery core to removing storage chamber
Cavity in addition is filled, and improves the air-tightness of storage chamber so that pressure in storage chamber it is stable and with battery core internal pressure
Quite, so improve flame-proof battery safety coefficient.
Detailed description of the invention
Fig. 1 is the partial structure sectional view of this flame-proof battery.
In figure, 1, shell；11, the first heat-conducting piece；12, the second heat-conducting piece；13, liquid injection hole；2, battery core；3, fire-retardant medium；
4, first pressure control valve；5, storage chamber；6, second pressure control valve；7, closeouts.
Specific embodiment
It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further
Description, but the utility model is not limited to these examples.
As shown in Figure 1, this flame-proof battery includes shell 1 and battery core 2.
Battery core 2 is placed in shell 1, fire-retardant medium 3 is equipped between shell 1 and battery core 2 and for storing fire-retardant medium 3
Storage chamber 5 is equipped with the first heat-conducting piece 11 and the second heat-conducting piece 12 for heat transfer between shell 1 and battery core 2, first is thermally conductive
Part 11 is located at the bottom of shell 1, and the second heat-conducting piece 12 is located at the top of shell 1, and the side wall of the first heat-conducting piece 11 and second are led
Warmware 12 reclines battery core 2, and storage chamber 5 is enclosed by shell 1, the first heat-conducting piece 11, battery core 2 and the second heat-conducting piece 12,
First heat-conducting piece 11 and the second heat-conducting piece 12 are cylindrical in shape, and the first heat-conducting piece 11 reclines 1 bottom of shell far from one end of storage chamber 5
Portion, 1 top of the one end of the second heat-conducting piece 12 far from storage chamber 5 and shell is concordant, shell 1, the first heat-conducting piece 11, battery core 2 and
Second heat-conducting piece 12 is made of etch-proof metal material.
Battery core 2 is equipped with the first pressure control valve 4 for controlling fire-retardant medium 3, and the inside of battery core 2 passes through first pressure
Control valve 4 is connected with the bottom of storage chamber 5, fire-retardant when the air pressure inside battery core 2 is greater than the air pressure between shell 1 and battery core 2
Medium 3 can be conducted to inside battery core 2 by first pressure control valve 4, and shell 1 is equipped with second pressure control valve 6, storage chamber 5
First pressure can be greater than with 1 turned on outside of shell, the cracking pressure of second pressure control valve 6 by second pressure control valve 6
The cracking pressure of control valve 4, after first pressure control valve 4 is opened, the gas pressure inside battery core 2 continues to increase, at this time
The outside of shell 1 is connected with the top of storage chamber 5 by second pressure control valve 6, the quantity of first pressure control valve 4 and the
The quantity of two pressure-control valves 6 is two.
The liquid injection hole 13 for being connected to storage chamber 5 is offered on 1 outer wall of shell, and liquid injection hole 13 is located at first pressure control valve
4 top and the lower section for being located at second pressure control valve 6, the closeouts 7 for blocking liquid injection hole 13 are equipped in liquid injection hole 13,
By being welded and fixed between 13 aperture of closeouts 7 and liquid injection hole.
In this flame-proof battery production process, by being vacuumized between shell 1 and battery core 2, so that shell 1 and battery core
Air pressure between 2 is suitable with the air pressure inside battery core 2, and when short circuit occurs for this flame-proof battery, the air pressure inside battery core 2 is greater than shell
Air pressure between body 1 and battery core 2, the valve port of first pressure control valve 4 is opened at this time, so that fire-retardant medium 3 passes through first pressure
Control valve 4 enters directly into 2 inside of battery core and mixes with the electrolyte of inside battery, prevents 2 internal-combustion of battery core, meanwhile, lead to
The pressure value for crossing reasonable set first pressure control valve 4 enables fire-retardant medium 3 to timely enter inside battery core 2, to prevent
Start to burn inside battery core 2, if the gas pressure inside battery core 2 continues to increase after first pressure control valve 4 is opened, this
When shell 1 outside be connected with the top of storage chamber 5 by second pressure control valve 6 so that the excessive air pressure inside battery core 2
It is discharged by 6 valve port of second pressure control valve to shell 1, it is secondary fire-retardant to prevent 2 internal-combustion of battery core, thus further
Improve the safety coefficient of flame-proof battery.
The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute
Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar
Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.
Although shell 1, the first heat-conducting piece 11, the second heat-conducting piece 12, liquid injection hole 13, battery core 2, resistance is used more herein
The terms such as medium 3, first pressure control valve 4, storage chamber 5, second pressure control valve 6, closeouts 7 are fired, but use is not precluded
A possibility that other terms.The use of these terms is merely for the convenience of describing and explaining the nature of the invention；?
It is contrary to the spirit of the present invention that they, which are construed to any additional limitation all,.
Claims (10)
1. a kind of flame-proof battery, including shell (1) and the battery core (2) being placed in shell (1), the shell (1) and battery core (2)
Between be equipped with fire-retardant medium (3), which is characterized in that the battery core (2) is equipped with first pressure for controlling fire-retardant medium (3)
Control valve (4), when the internal air pressure of the battery core (2) is greater than the air pressure between shell (1) and battery core (2), fire-retardant Jie
It is internal that matter (3) can be conducted to battery core (2) by first pressure control valve (4).
2. a kind of flame-proof battery according to claim 1, which is characterized in that have between the shell (1) and battery core (2)
For storing the storage chamber (5) of fire-retardant medium (3), the inside of the battery core (2) passes through first pressure control valve (4) and storage chamber
(5) bottom conducting.
3. a kind of flame-proof battery according to claim 2, which is characterized in that the shell (1) is equipped with second pressure control
Valve (6) processed, the storage chamber (5) can be with shell (1) turned on outside, the second pressures by second pressure control valve (6)
The cracking pressure of control valve (6) is greater than the cracking pressure of first pressure control valve (4).
4. a kind of flame-proof battery according to claim 3, which is characterized in that the outside of the shell (1) passes through the second pressure
Force control valve (6) is connected with the top of storage chamber (5).
5. a kind of flame-proof battery according to claim 4, which is characterized in that the quantity of the first pressure control valve (4)
And the quantity of second pressure control valve (6) is two.
6. a kind of flame-proof battery according to Claims 2 or 3 or 4 or 5, which is characterized in that the shell (1) and battery core
(2) the first heat-conducting piece (11) and the second heat-conducting piece (12) for heat transfer, the first heat-conducting piece (11) position are equipped between
In the bottom of shell (1), second heat-conducting piece (12) is located at the top of shell (1), first heat-conducting piece (11) and
Two heat-conducting pieces (12) recline battery core (2), and the storage chamber (5) is by shell (1), the first heat-conducting piece (11), battery core (2) and
Two heat-conducting pieces (12) are enclosed.
7. a kind of flame-proof battery according to claim 6, which is characterized in that first heat-conducting piece (11) and second lead
Warmware (12) is cylindrical in shape, and first heat-conducting piece (11) reclines shell (1) bottom far from the one end of storage chamber (5), and described the
The one end of two heat-conducting pieces (12) far from storage chamber (5) is concordant at the top of shell (1).
8. a kind of flame-proof battery according to claim 6, which is characterized in that the shell (1), the first heat-conducting piece (11),
Battery core (2) and the second heat-conducting piece (12) are made of etch-proof metal material.
9. a kind of flame-proof battery according to claim 3 or 4 or 5, which is characterized in that opened up on shell (1) outer wall
There is the liquid injection hole (13) for being connected to storage chamber (5), and the liquid injection hole (13) is located at top and the position of first pressure control valve (4)
In the lower section of second pressure control valve (6).
10. a kind of flame-proof battery according to claim 9, which is characterized in that be equipped with and be used in the liquid injection hole (13)
The closeouts (7) for blocking liquid injection hole (13), by being welded and fixed between the closeouts (7) and liquid injection hole (13) aperture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821452226.5U CN208674220U (en) | 2018-09-05 | 2018-09-05 | A kind of flame-proof battery |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821452226.5U CN208674220U (en) | 2018-09-05 | 2018-09-05 | A kind of flame-proof battery |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208674220U true CN208674220U (en) | 2019-03-29 |
Family
ID=65841628
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821452226.5U Expired - Fee Related CN208674220U (en) | 2018-09-05 | 2018-09-05 | A kind of flame-proof battery |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208674220U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725599A (en) * | 2022-03-18 | 2022-07-08 | 中国第一汽车股份有限公司 | Lithium ion battery with buffer structure |
-
2018
- 2018-09-05 CN CN201821452226.5U patent/CN208674220U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114725599A (en) * | 2022-03-18 | 2022-07-08 | 中国第一汽车股份有限公司 | Lithium ion battery with buffer structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| 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: 20190329 Termination date: 20210905 |