CN108807785A - Power battery explosion-proof device, power battery and electric automobile - Google Patents
Power battery explosion-proof device, power battery and electric automobile Download PDFInfo
- Publication number
- CN108807785A CN108807785A CN201810698807.5A CN201810698807A CN108807785A CN 108807785 A CN108807785 A CN 108807785A CN 201810698807 A CN201810698807 A CN 201810698807A CN 108807785 A CN108807785 A CN 108807785A
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- China
- Prior art keywords
- explosion
- power battery
- face
- mounting hole
- proof device
- 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.)
- Granted
Links
- 238000007789 sealing Methods 0.000 claims abstract description 23
- 230000007613 environmental effect Effects 0.000 claims abstract description 13
- 230000000149 penetrating effect Effects 0.000 claims abstract 2
- 230000015572 biosynthetic process Effects 0.000 claims description 6
- 230000004048 modification Effects 0.000 claims description 5
- 238000012986 modification Methods 0.000 claims description 5
- 239000012528 membrane Substances 0.000 abstract description 2
- 239000007789 gas Substances 0.000 description 8
- 238000004880 explosion Methods 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 230000008901 benefit Effects 0.000 description 2
- 230000008859 change Effects 0.000 description 2
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 239000000741 silica gel Substances 0.000 description 2
- 229910002027 silica gel Inorganic materials 0.000 description 2
- 230000009471 action Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000003111 delayed effect Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 238000010030 laminating Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012982 microporous membrane Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000004810 polytetrafluoroethylene Substances 0.000 description 1
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M50/00—Constructional details or processes of manufacture of the non-active parts of electrochemical cells other than fuel cells, e.g. hybrid cells
- H01M50/30—Arrangements for facilitating escape of gases
- H01M50/317—Re-sealable arrangements
- H01M50/325—Re-sealable arrangements comprising deformable valve members, e.g. elastic or flexible valve members
-
- 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
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention provides a power battery explosion-proof device, a power battery and an electric automobile, and relates to the technical field of automobile safety, wherein the device comprises: the explosion-proof body comprises a mounting hole penetrating through the first end face and the second end face, and an ejector pin protruding towards the first end face is arranged in the mounting hole; the rupture membrane is fixed on the first end face and comprises a second state of sealing the mounting hole when the environmental pressure is less than a first preset pressure and a first state of being broken by the ejector pin when the environmental pressure is greater than or equal to the first preset pressure; the motion valve core is arranged on the second end surface and comprises a guide post inserted into the mounting hole; when the rupture disk is in a second state, the valve core is moved to seal the mounting hole on the second end face; when the rupture disk is in the first state, the movable valve core forms a gas flow channel at the second end surface; the spring is sleeved on the guide post inserted in the mounting hole, and the movable valve core is driven to recover to a sealing state from an opening state when the environmental pressure in the mounting hole is less than or equal to a second preset pressure. The invention improves the safety of the vehicle.
Description
Technical field
The invention belongs to technical field of vehicle safety, more particularly, to a kind of explosion-proof device of power battery, power battery and
Electric vehicle.
Background technology
Increasingly serious with Energy situation, the environmental consciousness of people is gradually reinforced, and new energy vehicle gradually comes into the common people hundred
The daily life of surname, thing followed safety problem also gradually cause production firm and the attention of user.Wherein, current big portion absolutely
Battery can all discharge heat in use used by dividing new energy vehicle power supply on vehicle system.However in limit thermal runaway
Under, huge energy is embodied by expanding gas, high temperature, explosion, Mars form inside power battery, is at present reply power battery
Energy when thermal runaway occurs in the closed envelope for meet IPX7 waterproofing grade and discharges for system, usually installs and is used in pressure vessel
Explosion-proof valve, there are the following problems in use at present, and rupture disk front filter is because mesh is intensive to be sent out in electrokinetic cell system
It is blocked when heat is out of control, energy cannot leak；Energy leaks break through rupture disk after, formed and the through-hole of outside air, power electric
After the outer flame flame of cell system, as pressure declines in packet, outside air is back in power battery, combustion-supporting power battery system
System.
Invention content
The embodiment of the present invention is designed to provide a kind of explosion-proof device of power battery, power battery and electric vehicle, from
And when solving power battery thermal runaway, energy can not leak and return the more problem of oxygen amount.
To achieve the goals above, an embodiment of the present invention provides a kind of explosion-proof device of power battery, including：
Explosion-proof ontology, including penetrate the mounting hole of first end face and second end face, and the mounting hole is internally provided with
Towards a first end face at least thimble outstanding；
Rupture disk is fixed in the first end face；The rupture disk includes that local environment pressure is less than the first default pressure
When power, the second state of the mounting hole is sealed, when local environment pressure is greater than or equal to first preset pressure, towards described
The internal modification of mounting hole, the first state worn out by the thimble；
Spool is moved, is set at the second end face, wherein the movement spool further includes inserting to extend into the installation
Guide post inside hole；Wherein, when the rupture disk is in second state, the movement spool can be described second
Endface seals the mounting hole, is formed as sealing state；When the rupture disk is in the first state, the movement valve
Core constitutes gas flow channel at the second end face, and formation is in an open state；
Spring is sheathed in the guide post inserted and be stretched outside in the mounting hole；The spring can be in the mounting hole
When interior environmental pressure is less than or equal to the second preset pressure, the movement spool is driven to restore from the opening state to described
Sealing state；Wherein, second preset pressure is less than first preset pressure.
Wherein, in the rupture disk after second state change is the first state, if in the mounting hole
Environmental pressure is more than second preset pressure, then the spring drives the movement spool towards the side far from the explosion-proof ontology
To movement, the movement spool is made to constitute gas flow channel at the second end face, formation is in an open state.
Wherein, the explosion-proof device of power battery further includes mounting bracket, and the explosion-proof ontology integrally connected, parallel
In in the plane of the cross section of the mounting hole, the mounting bracket is around the explosion-proof ontology setting, wherein the first end
Face and the end face of the mounting bracket are generally aligned in the same plane, and the second end face protrudes from the other end of the mounting bracket
Face.
Wherein, multiple nested nuts are provided in the mounting bracket, by the nested nut with setting in power electric
The cooperation of bolt on the shell of pond, the mounting bracket are fixed on the housing of power cell.
Wherein, it is provided with the first seal groove on the end face that the mounting bracket is generally aligned in the same plane with the first end face,
And it is provided with the first sealing ring in first seal groove.
Wherein, the thimble is laminated structure, is provided in the guide post and axially penetrates through described lead along the guide post
To the mounting groove of column, the thimble is fastened in the mounting groove.
Wherein, the explosion-proof device of power battery further includes the nut abutted with the spring, wherein the nut and institute
The screw-thread fit being oriented on column outer wall is stated, for locking the spring.
Wherein, it is provided with the second seal groove on the end face that the movement spool is connect with the guide post, described second is close
The second sealing ring is provided in sealing groove.
Wherein, the explosion-proof device of power battery further includes the catch net that lid is located on the rupture disk, wherein the guarantor
The edge of protecting wire net is provided with multiple recessed portions, and multiple lug bosses are provided in the first end face, is clamped by the recessed portion
On the lug boss, the catch net is fixed at the first end face.
Wherein, multiple sector opens are provided on the catch net.
The embodiment of the present invention also provides a kind of power battery, including：Housing of power cell and power battery as described above
Explosion-protection equipment, wherein the explosion-proof device of power battery is fixed on the housing of power cell.
The embodiment of the present invention also provides a kind of electric vehicle, including power battery as described above.
The above-mentioned technical proposal of the present invention at least has the advantages that：
The embodiment of the present invention is realized by the way that the spring is arranged in the explosion-proof device of power battery in power battery
When limit thermal runaway occurs, the high pressure in power battery makes movement spool open, to realize the high pressure in the power battery
The release of gas；When the pressure in the power battery is less than or equal to the screen resilience of the spring, the movement spool exists
It is sprung back under the drive of the spring, the power battery is back to reduce extraneous fresh air, reduced between battery core
Heat sprawling feature, extend escape time, improve safety.
Description of the drawings
Fig. 1 is the schematic diagram of the explosion-proof device of power battery of the embodiment of the present invention；
Fig. 2 is the connection diagram of the explosion-proof ontology and mounting bracket of the embodiment of the present invention；
Fig. 3 is the schematic diagram of the movement spool of the embodiment of the present invention；
Fig. 4 is the front view of the explosion-proof device of power battery of the embodiment of the present invention；
Fig. 5 is the vertical view of the explosion-proof device of power battery of the embodiment of the present invention；
Fig. 6 is the left view of the explosion-proof device of power battery of the embodiment of the present invention；
Fig. 7 is the axonometric drawing of the explosion-proof device of power battery of the embodiment of the present invention.
Reference sign：
The explosion-proof ontologies of 1-, 2- rupture disks, 3- move spool, 4- springs, 5- nesting nuts, the first seal grooves of 6-, 7- first
Sealing ring, 8- thimbles, the second seal grooves of 9-, the second sealing rings of 10-, 11- mounting brackets, 12- sector opens, 13- reinforcing ribs,
14- trademarks, 15- guide posts, 16- fixing devices, 17- nuts, 18- catch nets.
Specific implementation mode
To keep the technical problem to be solved in the present invention, technical solution and advantage clearer, below in conjunction with attached drawing and tool
Body embodiment is described in detail.
For the embodiment of the present invention for power battery in the prior art in limit thermal runaway, protective film rupture forms power
The through-hole of battery and outside air, as the pressure in power battery declines, outside air is back in power battery, accelerates electricity
The problem of core heat is spread provides a kind of explosion-proof device of power battery, power battery and electric vehicle, has delayed power battery in pole
The heat sprawling of battery core, escape time is left for passenger when thermal relief is out of control.
As shown in Fig. 1-Fig. 7, one embodiment of the invention provides a kind of explosion-proof device of power battery, including：
Explosion-proof ontology 1, including penetrate the mounting hole of first end face and second end face, and the mounting hole is internally provided with
Towards a first end face at least thimble 8 outstanding；Rupture disk 2 is fixed in the first end face；The rupture disk 2 includes
When local environment pressure is less than the first preset pressure, the second state of the mounting hole is sealed, local environment pressure is more than or waits
When first preset pressure, towards the internal modification of the mounting hole, the first state worn out by the thimble 8；Move valve
Core 3 is set at the second end face, wherein the movement spool 3 further includes inserting the guiding extended into inside the mounting hole
Column 15；Wherein, when the rupture disk 2 is in second state, the movement spool 3 can be close at the second end face
The mounting hole is sealed, sealing state is formed as；When the rupture disk 2 is in the first state, the movement spool 3 is in institute
Composition gas flow channel, formation at second end face is stated to be in an open state；Spring 4 is sheathed on slotting be stretched outside in the mounting hole
In the guide post 15；The spring 4 can the environmental pressure in the mounting hole be less than or equal to the second preset pressure when,
The movement spool 3 is driven to restore from the opening state to the sealing state；Wherein, second preset pressure is less than institute
State the first preset pressure.
The embodiment of the present invention is by the way that when power battery limit heat is out of control, the huge energy inside power battery makes described quick-fried
Rupture of membranes 2 is deformed upon from the first end face to the second end face so that the jag of the rupture disk 2 and the thimble 8
Contact, the rupture disk 2 is worn out by the thimble 8, under the promotion of huge energy, makes the movement spool 3 to far from described
The direction of explosion-proof ontology 1 is moved, and gas flow channel is formed, and realizes energy inside power battery to expanding outside power battery
It dissipates.When the pressure in the power battery drops to the second preset pressure, the spring 4 resets, and drives the movement spool 3
It is moved to close to the direction of the explosion-proof ontology 1 so that the movement spool 3 closes the installation at the second end face
Hole reduces outside air and enters in the power battery, to delay the power battery that the harm such as violent fire occur
Time, leave escape time for passenger, improve the security performance of vehicle.
What needs to be explained here is that the spring 4 is compression reseting spring, lost when the power battery is not in limit heat
When controlling operating mode, the spring 4 is compressive state, and when the power battery is in thermal runaway state, the spring 4 is in huge energy
Free state or tensional state are transformed to by compressive state under the action of amount, to drive the movement spool 3 to move, form gas
Body flow channel.Preferably, the spring 4 is the reset elements such as disc spring, is occupied to reduce the explosion-proof device of power battery
Space.
Preferably, the rupture disk 2 is to be compounded in by laminating technology with common fabric through polytetrafluoroethylmicroporous microporous membrane
Material together, referred to as：E-PTFE, the rupture disk 2 are fixed on by hot melting way on the inner wall of the explosion-proof ontology 1.Institute
It states spring 4 to be set on the thimble 8 from the jag of the thimble 8, inserts and stretched into the mounting hole when the guide post 15
Afterwards, the thimble 8 is located at the inside of the guide post 15, and the spring 4 is set in the guide post 15.
First preset pressure is according to the prominent of the deformation quantity of the rupture disk 2 and the rupture disk and the thimble 8
The critical pressure value that the distance between outlet determines；Second preset pressure is the compression reseting spring pressure of the spring 4.
Wherein, after in order to ensure the pressure reduction in the power battery, the spring 4 can reset, according to great number tested data
Determine the pressure in power battery, the environmental pressure in mounting hole and spring rate correspondence, and selected meet want
Seek the spring of spring rate.
Specifically, in the rupture disk 2 after second state change is the first state, if in the mounting hole
Environmental pressure be more than first preset pressure, the then length increase of the spring 4, to drive 3 court of movement spool
Direction movement far from the explosion-proof ontology 1, makes the movement spool 3 constitute gas flow channel at the second end face,
Formation is in an open state；After the rupture disk 2 is in first state, if the environmental pressure in the mounting hole is less than or equal to
Second preset pressure, the then reset of the spring 4, to drive the movement spool 3 towards close to the side of the explosion-proof ontology 1
To movement, the movement spool 3 is made to close the mounting hole at the second end face.
Further, as depicted in figs. 1 and 2, for the ease of the explosion-proof device of power battery is fixed on power battery
On shell, the explosion-proof device of power battery of the embodiment of the present invention further includes mounting bracket 11, the mounting bracket 11 and institute
1 integrally connected of explosion-proof ontology is stated, in the plane of cross section for being parallel to the mounting hole, the mounting bracket 11 is around described
Explosion-proof ontology 1 is arranged, wherein as shown in Fig. 1, Fig. 4 and Fig. 6, the end face position of the first end face and the mounting bracket 11
In same plane, the second end face protrudes from the other end of the mounting bracket 11.
Preferably, the mounting bracket 11 is a rectangular frame, in order to mitigate the weight of the explosion-proof device of power battery
And its intensity is improved, the mounting bracket 11 passes through multiple reinforcing ribs 13 and 1 integrally connected of explosion-proof ontology.
Further, as shown in Figure 1 and Figure 5, for the ease of the power battery explosion protection is filled by the mounting bracket
It sets on the housing of power cell, the embodiment of the present invention is provided with multiple nested nuts 5 in the mounting bracket 11,
By the cooperation of the nested nut 5 and the bolt being arranged on housing of power cell, the mounting bracket 11 is made to be fixed on institute
It states on housing of power cell.Preferably, the nested nut 5 by Shooting Technique be arranged the mounting bracket 11 each
Edge.
In order to improve the sealing effect between the mounting bracket 11 and the housing of power cell, ensure the power electric
The degree of protection when routine work of pond, the embodiment of the present invention are generally aligned in the same plane in the mounting bracket 11 and the first end face
End face on be provided with the first seal groove 6, and the first sealing ring 7 is provided in first seal groove 6.Wherein, described first
Sealing ring 7 is high-temperature silica gel sealing ring, to avoid the huge energy generated due to power battery from leading to first sealing ring 7
It is melted；The mounting bracket 11 is bonded with the end face that the first end face is generally aligned in the same plane with the housing of power cell.
Again as shown in Fig. 2, in order to be further reduced described explosion-proof device of power battery the space occupied, the explosion-proof ontology
1 includes internal diameter difference and identical two cylindrical structures of wall thickness, wherein two cylindrical structures are coaxial, and internal diameter is smaller
The first cylinder structure division, which is inserted, stretches into the larger the second cylinder structure of internal diameter, and the first cylinder structure, which is inserted, stretches into first circle
It is provided with multiple strengthened connection bars between the outer wall of the part of barrel structure and the inner wall of the second cylinder structure, realizes described the
One cylindrical structure is fixedly connected with the second cylinder structure.Wherein, the first cylinder structure is far from described the second cylinder
The end face of structure is the first end face of the explosion-proof ontology 1, end of the second cylinder structure far from the first cylinder structure
Face is the second end face of the explosion-proof ontology 1.
As shown in Fig. 2, in order to improve the firmness that the guide post 15 is connect with the explosion-proof ontology 1, the present invention is implemented
The thimble 8 need to be inserted when the guide post 15 inserts and stretches into the mounting hole and stretch into the guide post 15 by example.Therefore, described
Thimble 8 is laminated structure and coaxial with the explosion-proof ontology 1.In order to which the thimble 8 is fixed in the mounting hole, the present invention
The thimble 8 is arranged in the slotting part for stretching into the first cylinder structure of the second cylinder structure, and by more embodiment
A symmetrically arranged fixing device 16 is fixedly connected with the inner wall of the first cylinder structure, wherein multiple fixing devices
16 form a circular hole coaxial with the first cylinder structure, and the non-protruding end of the thimble 8 is arranged in the circular hole, and
Two corners at the non-protruding end are fixedly connected with the inner wall for forming the circular hole.
The inner wall of the circular hole formed due to two corners and the fixing device 16 of the thimble 8 is connect, for the ease of will
The thimble 8 is inserted and stretches into the guide post 15, as shown in figure 3, the embodiment of the present invention is provided in the guide post 15 along institute
State the mounting groove that guide post 15 axially penetrates through the guide post 15, the thimble 8 is inserted when stretching into the guide post 15, the thimble
8 both sides are fastened in the mounting groove.
Further, in order to which when the power battery is in nominal situation, the spring 4 is at compressive state,
The explosion-proof device of power battery further includes the nut 17 abutted with the spring 4, wherein the nut 17 and the guide post
Screw-thread fit on 15 outer walls is for locking the spring 4.
As shown in figure 3, in order to improve the sealing effect of the movement spool 3, when ensureing the power battery routine work
Degree of protection, the embodiment of the present invention is also provided with second on the end face that is connect with the guide post 15 of movement spool 3
Seal groove 9, and the second sealing ring 10 is provided in second seal groove 9, second sealing ring 10 is that high temperature resistant silica gel is close
Seal.
Further, as shown in Figure 1 and Figure 7, in order to avoid since the pressure in the mounting hole is more than the power electric
When pressure inside pond, the rupture disk 2 is deformed or is ruptured to the housing of power cell side, the embodiment of the present invention it is described dynamic
Power explosion protection for batteries further includes the catch net 18 that lid is located on the rupture disk 2, and the catch net 18 is arranged with the thimble 8
In the opposite both sides of the rupture disk 2, wherein the edge of the catch net 18 is provided with multiple recessed portions, the first end face
On be provided with multiple lug bosses, be connected on the lug boss by the recessed portion, the catch net 18 is fixed on described
At end face.
Certainly, in order to solve in the prior art when the power battery is in limit thermal runaway operating mode, due to catch net
Mesh blocks so that the problem of energy cannot leak, it is larger that the embodiment of the present invention is provided with area in the catch net 18
The central angle of multiple sector opens 12, the preferred sector open is 90 °, and the radius of the sector open is located at the protection
Between 3/4ths and the radius of the catch net 18 of the radius of net 18.
Specifically, as shown in Figure 1 and Figure 5, the embodiment of the present invention is at the movement end of the spool 3 far from the guide post 15
Trademark 14 is also pasted on face, consequently facilitating user intuitively determines the production firm of the explosion-proof device of power battery.
The explosion-proof device of power battery of the embodiment of the present invention is realized by the way that the spring 4 is arranged in the power
After the energy release of battery, when the environmental pressure in the mounting hole is less than second preset pressure, driven by the spring 4
The movement spool 3 is moved to close to the direction of the explosion-proof ontology 1, and the movement spool 3 is made to be sealed at the second end face
The mounting hole is closed, avoids outside air from entering the power battery, longer escape time is provided for passenger；By increasing institute
The area for stating each opening of catch net 18 avoids the blocking of the catch net 18 from causing the energy of the power battery cannot be outer
It lets out.
Another embodiment of the present invention provides a kind of power battery, including housing of power cell and power as described above
Explosion protection for batteries.
The embodiment of the present invention also provides a kind of electric vehicle, including power battery as described above.
The above is the preferred embodiment of the present invention, it is noted that for those skilled in the art
For, without departing from the principles of the present invention, several improvements and modifications can also be made, these improvements and modifications
It should be regarded as protection scope of the present invention.
Claims (12)
1. a kind of explosion-proof device of power battery, which is characterized in that including：
Explosion-proof ontology (1), including penetrate the mounting hole of first end face and second end face, and the mounting hole is internally provided with court
A first end face at least thimble (8) outstanding；
Rupture disk (2), is fixed in the first end face；The rupture disk (2) includes that local environment pressure is default less than first
When pressure, the second state of the mounting hole is sealed, when local environment pressure is greater than or equal to first preset pressure, towards institute
The internal modification for stating mounting hole, the first state worn out by the thimble (8)；
Spool (3) is moved, is set at the second end face, wherein the movement spool (3) further includes inserting to extend into the peace
Fill the guide post (15) inside hole；Wherein, when the rupture disk (2) is in second state, movement spool (3) energy
It is enough that the mounting hole is sealed at the second end face, be formed as sealing state；It is in first shape in the rupture disk (2)
When state, the movement spool (3) constitutes gas flow channel at the second end face, and formation is in an open state；
Spring (4) is sheathed in the guide post (15) inserted and be stretched outside in the mounting hole；The spring (4) can be described
When environmental pressure in mounting hole is less than or equal to the second preset pressure, drive the movement spool (3) from the opening state
Restore to the sealing state；Wherein, second preset pressure is less than first preset pressure.
2. explosion-proof device of power battery according to claim 1, which is characterized in that in the rupture disk (2) from described
After two-state variation is the first state, if environmental pressure in the mounting hole is more than second preset pressure, institute
Stating spring (4) drives the movement spool (3) to be moved towards the direction far from the explosion-proof ontology (1), makes the movement spool (3)
Gas flow channel is constituted at the second end face, formation is in an open state.
3. explosion-proof device of power battery according to claim 1, which is characterized in that the explosion-proof device of power battery also wraps
Mounting bracket (11) is included, and explosion-proof ontology (1) integrally connected, in the plane of cross section for being parallel to the mounting hole,
The mounting bracket (11) is around explosion-proof ontology (1) setting, wherein the first end face and the mounting bracket (11)
End face is generally aligned in the same plane, and the second end face protrudes from the other end of the mounting bracket (11).
4. explosion-proof device of power battery according to claim 3, which is characterized in that be provided on the mounting bracket (11)
Multiple nesting nuts (5) pass through the cooperation of the nested nut (5) and the bolt being arranged on housing of power cell, the peace
Dress holder (11) is fixed on the housing of power cell.
5. explosion-proof device of power battery according to claim 3, which is characterized in that the mounting bracket (11) and described the
It is provided with the first seal groove (6) on the end face that end face is generally aligned in the same plane, and first is provided in first seal groove (6)
Sealing ring (7).
6. explosion-proof device of power battery according to claim 1, which is characterized in that the thimble (8) is laminated structure, institute
State the mounting groove for being provided in guide post (15) and axially penetrating through the guide post (15) along the guide post (15), the thimble
(8) it is fastened in the mounting groove.
7. explosion-proof device of power battery according to claim 1, which is characterized in that the explosion-proof device of power battery also wraps
Include the nut (17) abutted with the spring (4), wherein the nut (17) is matched with the screw thread on the guide post (15) outer wall
It closes, for locking the spring (4).
8. explosion-proof device of power battery according to claim 1, which is characterized in that the movement spool (3) is led with described
It is provided with the second seal groove (9) on the end face connected to column (15), the second sealing ring is provided in second seal groove (9)
(10)。
9. explosion-proof device of power battery according to claim 1, which is characterized in that the explosion-proof device of power battery also wraps
Include the catch net (18) that lid is located on the rupture disk (2), wherein the edge of the catch net (18) is provided with multiple recess
Portion is provided with multiple lug bosses in the first end face, is connected on the lug boss by the recessed portion, the catch net
(18) it is fixed at the first end face.
10. explosion-proof device of power battery according to claim 9, which is characterized in that be provided on the catch net (18)
Multiple sector opens (12).
11. a kind of power battery, which is characterized in that including：Housing of power cell and as described in any one of claim 1 to 10
Explosion-proof device of power battery, wherein the explosion-proof device of power battery is fixed on the housing of power cell.
12. a kind of electric vehicle, which is characterized in that including power battery as claimed in claim 11.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810698807.5A CN108807785B (en) | 2018-06-29 | 2018-06-29 | Power battery explosion-proof device, power battery and electric automobile |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810698807.5A CN108807785B (en) | 2018-06-29 | 2018-06-29 | Power battery explosion-proof device, power battery and electric automobile |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108807785A true CN108807785A (en) | 2018-11-13 |
| CN108807785B CN108807785B (en) | 2021-08-03 |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698298A (en) * | 2018-12-27 | 2019-04-30 | 蜂巢能源科技有限公司 | The pressure relief device of battery core |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
| CN110311079A (en) * | 2019-06-28 | 2019-10-08 | 蜂巢能源科技有限公司 | Explosion-proof ventilative membrane module and its explosion-proof vent valve of battery pack |
| CN111425635A (en) * | 2020-03-31 | 2020-07-17 | 威睿电动汽车技术(宁波)有限公司 | Thermal runaway anti-backfire pressure release valve and electric automobile |
| CN114198543A (en) * | 2020-08-31 | 2022-03-18 | 宁德时代新能源科技股份有限公司 | Bidirectional pressure release valve, battery and power utilization device |
| CN115282527A (en) * | 2021-11-12 | 2022-11-04 | 长城汽车股份有限公司 | Fire extinguishing box and battery pack lower box |
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| JPH11224658A (en) * | 1998-02-06 | 1999-08-17 | Fuji Elelctrochem Co Ltd | Current cut-off element and battery having current cut-off element |
| CN201126051Y (en) * | 2008-04-11 | 2008-10-01 | 张永志 | Negative pressure superconduction automatic start and stop discharge exploding apparatus |
| CN201438479U (en) * | 2009-07-28 | 2010-04-14 | 珠海锂源投资有限公司 | Explosion-proof unit for lithium ion batteries |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109698298A (en) * | 2018-12-27 | 2019-04-30 | 蜂巢能源科技有限公司 | The pressure relief device of battery core |
| CN109904366A (en) * | 2019-03-08 | 2019-06-18 | 合肥聚驰科技有限公司 | It is a kind of to provide the method and battery system of thermal runaway signal by explosion-proof relief valve |
| CN110311079A (en) * | 2019-06-28 | 2019-10-08 | 蜂巢能源科技有限公司 | Explosion-proof ventilative membrane module and its explosion-proof vent valve of battery pack |
| CN111425635A (en) * | 2020-03-31 | 2020-07-17 | 威睿电动汽车技术(宁波)有限公司 | Thermal runaway anti-backfire pressure release valve and electric automobile |
| CN111425635B (en) * | 2020-03-31 | 2022-04-05 | 威睿电动汽车技术(宁波)有限公司 | Thermal runaway anti-backfire pressure release valve and electric automobile |
| CN114198543A (en) * | 2020-08-31 | 2022-03-18 | 宁德时代新能源科技股份有限公司 | Bidirectional pressure release valve, battery and power utilization device |
| US11662036B2 (en) | 2020-08-31 | 2023-05-30 | Contemporary Amperex Technology Co., Limited | Bidirectional pressure relief valve, battery and electric device |
| CN114198543B (en) * | 2020-08-31 | 2023-08-08 | 宁德时代新能源科技股份有限公司 | Bidirectional pressure release valve, battery and electricity utilization device |
| CN115282527A (en) * | 2021-11-12 | 2022-11-04 | 长城汽车股份有限公司 | Fire extinguishing box and battery pack lower box |
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| CN108807785B (en) | 2021-08-03 |
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