CN109904367B - Be applied to ventilative relief valve of power battery package - Google Patents
Be applied to ventilative relief valve of power battery package Download PDFInfo
- Publication number
- CN109904367B CN109904367B CN201910216523.2A CN201910216523A CN109904367B CN 109904367 B CN109904367 B CN 109904367B CN 201910216523 A CN201910216523 A CN 201910216523A CN 109904367 B CN109904367 B CN 109904367B
- Authority
- CN
- China
- Prior art keywords
- ventilation
- valve
- breathable
- ventilation valve
- film
- 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.)
- Active
Links
Images
Classifications
-
- 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
- Gas Exhaust Devices For Batteries (AREA)
- Battery Mounting, Suspending (AREA)
Abstract
The invention relates to the field of new energy automobiles, in particular to a ventilation and pressure release valve applied to a power battery pack. The ventilation valve protection cover is characterized by comprising a ventilation valve protection cover, a ventilation film and a ventilation valve base, wherein the ventilation film is sleeved between the ventilation valve protection cover and the ventilation valve base, the main body of the ventilation valve protection cover is of a cavity structure with an opening at the lower part, a clamping structure for clamping the ventilation valve base is arranged at the inner edge of a cavity of the air valve protection cover, the outer edge of the ventilation valve base is attached to the inner wall of the ventilation valve protection cover, and a plurality of penetrating ventilation holes are formed in the side wall of the ventilation valve protection cover between the ventilation valve protection cover and the ventilation valve base at intervals; the installation is convenient and quick, the ventilating pressure release valve is installed on the battery box shell with the opened hole position, the installation can be completed by installing a fastener in the box body, and the time consumption of the installation process is short.
Description
Technical Field
The invention relates to the field of new energy automobiles, in particular to a ventilation and pressure release valve applied to a power battery pack.
Background
The power battery pack arranged at the bottom of the vehicle needs to reach the IP67 protection grade, and due to the influence of factors such as the heating of a battery core and the change of the external environment of the whole vehicle in the charging and discharging processes of the battery, the balance of the internal and external pressure in the box body can be ensured only by realizing the breathing of the gas inside and outside the box body, so that the reliability of the sealing structure is ensured; in addition, the battery pack can realize rapid air exhaust and pressure relief under the extreme conditions that the battery cell is out of control due to heat and the like.
At present, a spring explosion type ventilation relief valve or a thimble explosion type ventilation relief valve is frequently applied to a battery pack, the explosion pressure of the thimble type explosion valve is large, the consistency of the explosion pressure is poor, the inside and the outside of a box body are communicated after a breathable film is broken, and a large amount of external oxygen enters the box body to participate in reaction so that the inside of the battery is combusted again; the spring-opening type explosion valve has the defects that the pressure relief drift diameter is small and foreign matters enter to influence the sealing reliability; considering the purpose of light weight design of a battery system, the cover of the battery box is mostly of a thin-wall composite material structure, the cover is difficult to bear the pressure higher than 10kPa, and the two gas-permeable pressure release valves are difficult to ensure that the pressure in the box body is less than 10kPa in the thermal runaway process of the battery core; a novel breath venting and rapid pressure relief integrated valve is needed to ensure the safety of the power battery system.
Disclosure of Invention
The invention aims to overcome the defects in the prior art, adapt to practical requirements and provide the ventilating and pressure-releasing valve applied to the power battery pack.
In order to realize the purpose of the invention, the invention adopts the technical scheme that: a ventilation relief valve applied to a power battery pack comprises a ventilation valve protective cover 1, a ventilation membrane 2 and a ventilation valve base 3, wherein the ventilation membrane 2 is sleeved between the ventilation valve protective cover 1 and the ventilation valve base 3, the main body of the ventilation valve protective cover 1 is of a cavity structure with an opening at the lower part, a clamping structure used for clamping the ventilation valve base 3 is arranged at the inner edge of the cavity of the air valve protective cover 1, the outer edge of the ventilation valve base 3 is attached to the inner wall of the ventilation valve protective cover 1, and a plurality of through ventilation holes 14 are formed in the side wall of the ventilation valve protective cover 1 between the ventilation valve protective cover 1 and the ventilation valve base 3 at intervals; the edge of the breathable film 2 is attached to the edge of the breathable valve protective cover 1, the main body of the breathable valve base 3 is of an annular structure, a pressure relief vent hole 35 is formed in the annular surface of the air valve base 3, an air outlet hole is formed in the middle of the breathable valve base 3, a positioning structure 31 and a sealing flange surface 36 are respectively arranged at two ends of the air outlet hole of the breathable valve base 3, and the middle of the breathable film is attached to the upper end of the sealing flange surface 36 in a normal state, so that the middle of the breathable film is arched upwards; the positioning structure 31 is inserted into the battery box cover 5 and fixed thereto.
The outer side of the positioning structure 31 is provided with a mounting structure 34, the mounting structure 34 is a screw thread, and the positioning structure 31 is inserted into the battery box cover 5 and fixed on the battery box cover 5 through a standard nut 7.
And a protective grating 37 is arranged on the air outlet.
The top of the ventilation valve protective cover 1 is provided with a guide structure 11 for shunting.
The ventilation valve protective cover 1 is provided with a plurality of protective fences 13 for shielding external water flow, hard objects, ultraviolet rays and the like from damaging the ventilation film 2, the protective fences 13 are arranged opposite to the ventilation holes 14, and the width of each protective fence 13 is larger than that of each ventilation hole 14.
The clamping structure comprises installation limiting structures 12 and buckles 15, the installation limiting structures 12 are arranged on the ventilation valve protective cover 1 between the adjacent protective fences 13, the installation limiting structures 12 are higher than the protective fences 13, the upper end of each installation limiting structure 12 is provided with one buckle 15, and the outer ring of the ventilation valve base 3 is clamped between the installation limiting structures 12 and the buckles 15.
And a circle of sealing element 4 is in threaded fit with the outer side of the positioning structure 31, and the upper surface and the lower surface of the sealing element 4 are respectively attached to the ventilation valve base 3 and the battery box cover 5.
The sealing member 4 outside is provided with many circles of outside protective fence 32, many circles of outside protective fence 32 are that multilayer annular is arranged and every layer of outside protective fence 32 is crisscross arranges, forms one and carries out the protective structure who protects sealing member 4.
The e-PTFE film is adopted, and the base of the air vent valve is integrally formed by plastic injection molding.
The fixing and attaching mode of the edge of the breathable film 2 and the edge of the breathable valve base 3 comprises hot melt welding, ultrasonic welding and 9495LE adhesive bonding and fixing.
The invention has the beneficial effects that:
1. the installation is convenient and quick, the ventilation relief valve is arranged on the shell of the battery box with the opened hole position, the installation can be completed by installing a fastener in the box, and the time consumption of the installation process is short;
2. the sealing element of the ventilation relief valve controls the compression amount through the limiting structure on the ventilation valve base, and can adapt to installation objects with different thicknesses and materials; the design of the ventilation relief valve avoids influence of accumulated water inside the ventilation relief valve on ventilation of the ventilation membrane, and the valve body can be installed in the horizontal or vertical direction;
3. the ventilation relief valve has good reliability, can prevent external foreign matters in any direction from puncturing the breathable film, and has a protective fence for preventing high-pressure flushing, airflow, illumination and the like from damaging the sealing element and the breathable film;
4. the protective performance is excellent, and the protection grade of IP67 can be met;
5. the pressure can be quickly released, the breathable film can deform according to a certain shape due to a certain increased pressure value in the box body, the quick pressure release channel is opened, and most of gas is discharged out of the box body through a plurality of pressure release holes in the base of the breathable valve;
6. the base pressure relief and flow guide structure of the air-permeable pressure relief valve can prevent a flame sprayed in the thermal runaway process from igniting a vehicle, and can automatically close the pressure relief channel after pressure relief, thereby reducing air convection inside and outside the box body and delaying the ignition time of a battery pack to the maximum extent;
7. the pressure relief opening pressure is low, the breathable film of the breathable pressure relief valve is fixed at the edge of the breathable valve base, the larger area of the breathable film can increase the deformation of the breathable film under the same pressure, and the breathable film and the sealing flange surface are separated at lower pressure to open the pressure relief channel;
drawings
The invention is further explained below with reference to the drawings and the embodiments.
FIG. 1 is an exploded schematic view of a vent-relief valve of the present invention;
FIG. 2 is a schematic structural view of a vent valve protecting cover;
fig. 3 and 4 are schematic structural views of a gas-permeable valve base;
FIG. 5 is a schematic view of the vented membrane mounted to the vent valve base;
FIG. 6 is a front view of the assembly of the present invention;
FIGS. 7, 8, 9 and 10 are sectional views A-A of the present invention;
FIG. 7 is a view showing the shape of a gas permeable membrane in an installed state according to the present invention;
FIG. 8 is a schematic representation of a breathable film of the present invention in a normal vent-to-atmosphere condition;
FIG. 9 is a view showing a vented membrane of the present invention about to open a pressure relief channel;
FIG. 10 shows a vented membrane of the present invention in a state of rapid pressure relief upon opening;
FIG. 11 is a schematic view of the present invention mounted on a power battery pack;
FIG. 12 is a sectional view showing a state where the container body of the present invention is mounted thereon;
FIG. 13 is a comparison of pressure relief curves for the present invention and other types of vent valves;
Detailed Description
The invention is further illustrated with reference to the following figures and examples:
see fig. 1-13.
In the description of the embodiments of the present invention, it should be understood that the terms "upper", "lower", "inside", "outside", etc. indicate positional relationships based on those shown in the drawings, and are merely for convenience of describing the present invention and do not require that the present invention be constructed in specific positional relationships, and thus should not be construed as limiting the present invention.
In the description of the present invention, the term "mounted" should be understood broadly, and may be a fixed connection, a detachable connection, a direct connection, or an indirect connection through an intermediary; the specific meaning of the above terms in the present invention can be understood by those skilled in the art and the professional;
the invention discloses a ventilation relief valve applied to a power battery pack, which comprises a ventilation valve protective cover 1, a ventilation film 2 and a ventilation valve base 3, wherein the ventilation film 2 is sleeved between the ventilation valve protective cover 1 and the ventilation valve base 3, the main body of the ventilation valve protective cover 1 is of a cavity structure with an opening at the lower part, a clamping structure used for clamping the ventilation valve base 3 is arranged at the inner edge of the cavity of the air valve protective cover 1, the outer edge of the ventilation valve base 3 is attached to the inner wall of the ventilation valve protective cover 1, and a plurality of through ventilation holes 14 are arranged at intervals on the side wall of the ventilation valve protective cover 1 between the ventilation valve protective cover 1 and the ventilation valve base 3; the edge of the breathable film 2 is attached to the edge of the breathable valve protective cover 1, the main body of the breathable valve base 3 is of an annular structure, a pressure relief vent hole 35 is formed in the annular surface of the air valve base 3, an air outlet hole is formed in the middle of the breathable valve base 3, a positioning structure 31 and a sealing flange surface 36 are respectively arranged at two ends of the air outlet hole of the breathable valve base 3, and the middle of the breathable film is attached to the upper end of the sealing flange surface 36 in a normal state, so that the middle of the breathable film is arched upwards; the positioning structure 31 is inserted into the battery box cover 5 and fixed thereto.
The outer side of the positioning structure 31 is provided with a mounting structure 34, the mounting structure 34 is a screw thread, and the positioning structure 31 is inserted into the battery box cover 5 and fixed on the battery box cover 5 through a standard nut 7.
And a protective grating 37 is arranged on the air outlet.
The top of the ventilation valve protective cover 1 is provided with a guide structure 11 for shunting.
The ventilation valve protective cover 1 is provided with a plurality of protective fences 13 for shielding external water flow, hard objects, ultraviolet rays and the like from damaging the ventilation film 2, the protective fences 13 are arranged opposite to the ventilation holes 14, and the width of each protective fence 13 is larger than that of each ventilation hole 14.
The clamping structure comprises installation limiting structures 12 and buckles 15, the installation limiting structures 12 are arranged on the ventilation valve protective cover 1 between the adjacent protective fences 13, the installation limiting structures 12 are higher than the protective fences 13, the upper end of each installation limiting structure 12 is provided with one buckle 15, and the outer ring of the ventilation valve base 3 is clamped between the installation limiting structures 12 and the buckles 15.
And a circle of sealing element 4 is in threaded fit with the outer side of the positioning structure 31, and the upper surface and the lower surface of the sealing element 4 are respectively attached to the ventilation valve base 3 and the battery box cover 5.
The sealing member 4 outside is provided with many circles of outside protective fence 32, many circles of outside protective fence 32 are that multilayer annular is arranged and every layer of outside protective fence 32 is crisscross arranges, forms one and carries out the protective structure who protects sealing member 4.
The e-PTFE film is adopted, and the base of the air vent valve is integrally formed by plastic injection molding.
The fixing and attaching mode of the edge of the breathable film 2 and the edge of the breathable valve base 3 comprises hot melt welding, ultrasonic welding and 9495LE adhesive bonding and fixing.
The invention discloses a ventilation relief valve applied to a power battery pack, which comprises a ventilation valve base, a ventilation valve protective cover, a sealing piece and a ventilation film, wherein the ventilation film and the sealing piece are arranged on the ventilation valve base; the vent valve base is provided with vent holes for rapid pressure relief under extreme conditions, the vent valve base is provided with a positioning and mounting structure for realizing reliable fixation on the battery pack, and the limiting structure on the vent valve base is used for controlling the compression amount of the sealing element, so that the sealing consistency and reliability are ensured; a protective grid is arranged on the base of the vent valve to prevent the vent membrane from being pierced by foreign matters; a sealing flange is arranged on the base of the vent valve to realize the internal and external sealing of the vent valve; the vent valve protective cover is provided with vent holes to realize internal and external respiration of the vent valve, the vent valve protective cover is provided with a protective fence to prevent foreign objects from piercing the vent valve and prevent high-pressure flushing or high-speed airflow from damaging the vent valve, and the vent valve protective cover is provided with a guide structure to ensure that the vent valve expands and deforms according to a certain shape; the breathable film is an expanded polytetrafluoroethylene film;
as shown in fig. 1, the vent relief valve comprises a vent valve protective cover 1, a gas-permeable membrane 2, a vent valve base 3 and a sealing member 4;
as shown in fig. 2, the ventilation valve protective cover 1 comprises a guide structure 11, an installation limiting structure 12, a protective fence 13, a ventilation hole 14 and a buckle 15; the guide structure 11 is used for controlling the expansion direction of the breathable valve 2, the limiting structure 12 and the buckle 15 are arranged to ensure that the assembly position of the breathable valve base 3 and the breathable valve protective cover 1 is kept in a fixed state, and the ventilation holes 14 realize the ventilation inside and outside the breathable valve protective cover; the protective fence 13 can prevent external water flow, hard objects, ultraviolet rays and the like from damaging the breathable film 2;
as shown in fig. 3 and 4, the base 3 of the vent valve includes a positioning structure 31, an external protective fence 32, a limiting structure 33, a mounting structure 34, a pressure relief vent 35, a sealing flange face 36 and a protective grid 37; the external protective fence 32 and the limiting structure 33 form a labyrinth structure to protect the sealing element 4 and prevent the internal flame from being sprayed out;
as shown in fig. 4 and 5, the gas permeable membrane 2 is preferably mounted on the gas permeable valve base 3, the gas permeable membrane 2 is preferably made of e-PTFE film, and the gas permeable valve base is preferably integrally injection molded by plastic; the breathable film 2 and the breathable valve base in the area A in the drawing can be reliably attached and fixed by adopting a process mature in the field, such as hot-melt welding and ultrasonic welding, or can be adhered and fixed by 9495LE glue of 3M company; in the region B in the diagram, due to the breathable film 2 stretched in the installation state, a certain compression stress is applied to the sealing flange face 36, and the material of the breathable film 2 has good compliance, so that the breathable film 2 and the sealing flange face 36 can form a sealing region, and in order to enhance the sealing reliability between the breathable film 2 and the sealing flange face 36, a layer of low-viscosity sealing medium, such as Loctite 5188 anaerobic adhesive, commonly used in the art is preferably coated on the sealing flange face 36;
as shown in fig. 6 and 7, the gas permeable membrane 2 is mounted on the vent valve base 3 and sealed with the sealing flange surface 36, and the sealing member 4 is used for sealing the mounting structure 34 of the vent valve base 3 and the mounting surface; the inside and the outside of the vent valve base 3 can realize breathing and ventilation only through the vent film 2, and the vent valve protective cover 1 realizes inside and outside ventilation through a plurality of vent holes 14;
as shown in fig. 8, after the internal temperature of the power battery pack rises, the internal pressure of the box body is increased due to gas expansion, the gas in the box body flows to the inside of the vent valve protective cover 1 through the gas permeable membrane 2, and further flows to the external environment through the vent holes 14; if the internal temperature of the power battery pack is reduced, external environment gas flows into the box body through the air holes 14 and the breathable films 2, so that internal and external pressure balance is realized;
as shown in fig. 9, the internal and external pressure difference affects the deformation of the breathable film 2, the larger the pressure difference is, the larger the deformation of the breathable film 2 is, when the internal pressure of the tank is rapidly increased, the external part of the breathable film 2 expands, and the guide structure 11 on the breathable valve protective cover 1 controls the expansion direction of the breathable film 2; the stretching angle of the breathable film in the state shown in the figure is favorable for overcoming the tension of the sealing medium at the sealing flange surface 36 to reach the set bursting pressure, and the breathable film 2 is separated from the sealing flange surface 36 after being further expanded; as shown in fig. 10, the internal pressure of the case rises sharply to reach the bursting pressure, the permeable membrane 2 expands and separates from the sealing flange surface 36, a large amount of gas in the case flows to the external environment through the plurality of pressure relief vent holes 35 on the base 3 of the vent valve, and simultaneously part of the gas flows to the inside of the vent valve protective cover 1 through the permeable membrane 2 and then flows to the external environment through the vent holes 14; the increased flow cross section ensures rapid pressure relief, meanwhile, the inner surface structure of the vent valve protective cover 1 limits transitional deformation and fracture of the vent film 2, when the pressure difference between the inside and the outside of the box body is reduced, the elastic recovery of the vent film 2 enables the vent film 2 to be attached to the sealing flange surface 36 again, the convection of the air inside and outside the box body is reduced, and the external oxygen can be reduced to enter the box body to participate in the reaction;
as shown in fig. 11 and 12, the gas-permeable pressure relief valve of the present invention can be fixed on the battery box cover 5 by a standard nut 7, and also can be fixed on the battery box body 6; the installation positioning structure 31 on the vent valve base 3 prevents the vent valve base 3 from rotating in the installation process; the limiting structure 33 on the vent valve base 3 is attached to the battery box cover 5 in the mounting state, so that the compression amount of the sealing element 4 is guaranteed to be a design target, and the sealing glue 4 realizes reliable sealing of the mounting interface of the battery box cover 5 and the vent valve base 3; the external protective fence 32 and the limiting structure 33 form a protective ring to protect the sealing element 4 from being damaged by external interference (such as high-pressure water flow, ultraviolet irradiation, foreign matters and the like), so that the long-term reliability is improved;
as shown in fig. 13, it is shown that 3 types of venting and pressure-releasing valves are respectively installed on a typical power battery pack, when the pressure inside the box body changes under the condition of thermal runaway of a single battery cell, the clear space 136L inside the battery pack and the battery cell generate 420L gas within 15 s; fig. 13, curve a shows a pressure variation curve in a box body in which the spring-burst type pressure release valve is installed, the spring-burst type pressure release valve can open a pressure release port at a pressure of 3kPa, but an opening stroke of the movable valve body is in direct proportion to an internal pressure, a low-pressure opening pressure release path is small, a pressure release flow is small, the pressure in the box body can be continuously increased until the pressure does not rise any more due to a sufficient pressure release flow, and analysis shows that a peak pressure in the box body in which the spring-burst type pressure release valve is installed can exceed 8kPa, and the pressure release speed is slow;
fig. 13, curve b, shows a thimble of a pressure change curve in a tank body provided with the thimble explosion type pressure release valve, the thimble explosion type pressure release valve is designed to rupture the breathable film under the pressure of 7kPa, and then to release pressure quickly through a pressure release channel with a diameter of 20mm, the pressure release speed of the thimble explosion type pressure release valve after explosion is very fast, but in order to prevent the breathable film from being punctured by false triggering of vibration and air pressure influencing factors, the explosion pressure of the valve is difficult to set to a lower value;
fig. 13, curve c shows the pressure variation curve in the tank body equipped with the inventive venting relief valve, which can achieve separation of the vented membrane 2 from the sealing flange surface 36 at about 2kPa, and can control the pressure in the tank body within 3kPa, thereby achieving rapid pressure relief characteristic; the specific critical separation pressure is related to the sealing medium, the initial stretching amount of the gas permeable membrane 2, the elastic modulus of the gas permeable membrane 2, and the like.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all equivalent modifications made by the present invention and the contents of the drawings or directly or indirectly applied to the related technical fields are included in the scope of the present invention.
Claims (7)
1. The utility model provides a be applied to ventilative relief valve of power battery package which characterized in that: the ventilation valve protection cover comprises a ventilation valve protection cover (1), a ventilation film (2) and a ventilation valve base (3), wherein the ventilation film (2) is sleeved between the ventilation valve protection cover (1) and the ventilation valve base (3), the main body of the ventilation valve protection cover (1) is of a cavity structure with an opening at the lower part, a clamping structure used for clamping the ventilation valve base (3) is arranged at the inner edge of the cavity of the ventilation valve protection cover (1), the outer edge of the ventilation valve base (3) is attached to the inner wall of the ventilation valve protection cover (1), and a plurality of through ventilation holes (14) are formed in the side wall of the ventilation valve protection cover (1) between the ventilation valve protection cover (1) and the ventilation valve base (3) at intervals; the edge of the breathable film (2) is attached to the edge of the breathable valve protective cover (1), the main body of the breathable valve base (3) is of an annular structure, a pressure relief vent hole (35) is formed in the annular surface of the breathable valve base, an air outlet hole is formed in the middle of the breathable valve base (3), a positioning structure (31) and a sealing flange surface (36) are respectively arranged at two ends of the air outlet hole of the breathable valve base (3), and the middle of the breathable film is attached to the upper end of the sealing flange surface (36) in a normal state, so that the middle of the breathable film is arched upwards; the positioning structure (31) is inserted into the battery box cover (5) and fixed with the battery box cover; the top of the vent valve protective cover (1) is provided with a guide structure (11) for shunting, after the internal temperature of the power battery pack rises, the internal pressure of the box body is increased due to gas expansion, the gas in the box body flows to the inside of the vent valve protective cover (1) through the gas-permeable film (2), and the gas further flows to the external environment through the gas holes (14); if the internal temperature of the power battery pack is reduced, external environment gas flows into the box body through the air holes (14) and the breathable films (2), internal and external pressure balance is achieved, the internal and external pressure difference can affect the deformation of the breathable films (2), the larger the pressure difference is, the larger the deformation of the breathable films (2) is, when the internal pressure of the box body is rapidly increased, the breathable films (2) expand outwards, and the guide structure (11) on the breathable valve protective cover (1) can control the expansion direction of the breathable films (2); when the internal pressure of the box body rises sharply to reach the bursting pressure, the breathable film (2) expands to be separated from the sealing flange surface (36), a large amount of gas in the box body flows to the external environment through a plurality of pressure relief vent holes (35) on the breathable valve base (3), and meanwhile, part of gas flows to the inside of the breathable valve protective cover (1) through the breathable film (2) and then flows to the external environment from the breathable hole (14); the increased flow cross section ensures rapid pressure relief, meanwhile, the inner surface structure of the ventilation valve protective cover (1) limits transitional deformation and fracture of the ventilation film (2), when the pressure difference between the inside and the outside of the box body is reduced, the elastic recovery of the ventilation film (2) enables the ventilation film (2) to be attached to the sealing flange surface (36) again, the convection of the air inside and outside the box body is reduced, and the external oxygen can be reduced to enter the box body to participate in reaction; a circle of sealing element (4) is in threaded fit with the outer side of the positioning structure (31), and the upper surface and the lower surface of the sealing element (4) are respectively attached to the vent valve base (3) and the battery box cover (5); sealing member (4) outside is provided with many circles of outside protective fence (32), outside protective fence (32) are that multilayer annular is arranged and every layer of outside protective fence (32) crisscross arranges, form a protective structure who protects sealing member (4).
2. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 1, wherein: the battery box cover is characterized in that a mounting structure (34) is arranged on the outer side of the positioning structure (31), the mounting structure (34) is a thread, and the positioning structure (31) is inserted into the battery box cover (5) and fixed on the battery box cover (5) through a standard nut (7).
3. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 1, wherein: and a protective grating (37) is arranged on the air outlet.
4. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 1, wherein: the ventilation valve protective cover (1) is provided with a plurality of protective fences (13) for shielding external water flow, hard objects or ultraviolet rays from damaging the ventilation film (2), the protective fences (13) are arranged opposite to the ventilation holes (14), and the width of each protective fence (13) is larger than that of each ventilation hole (14).
5. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 4, wherein: the clamping structure comprises mounting limiting structures (12) and buckles (15), the mounting limiting structures (12) are arranged on the ventilation valve protective cover (1) between the adjacent protective fences (13), the mounting limiting structures (12) are higher than the protective fences (13), each buckle (15) is arranged at the upper end of each mounting limiting structure (12), and the outer ring of the ventilation valve base (3) is clamped between the mounting limiting structures (12) and the corresponding buckle (15).
6. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 1, wherein: the base of the air valve is integrally formed by plastic injection molding.
7. The air-permeable pressure relief valve applied to the power battery pack as claimed in claim 1, wherein: the mode that the edge of the breathable film (2) is fixedly attached to the edge of the breathable valve base (3) comprises hot melt welding, ultrasonic welding and 9495LE (melt adhesive) gluing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216523.2A CN109904367B (en) | 2019-03-21 | 2019-03-21 | Be applied to ventilative relief valve of power battery package |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910216523.2A CN109904367B (en) | 2019-03-21 | 2019-03-21 | Be applied to ventilative relief valve of power battery package |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109904367A CN109904367A (en) | 2019-06-18 |
| CN109904367B true CN109904367B (en) | 2021-11-12 |
Family
ID=66952847
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910216523.2A Active CN109904367B (en) | 2019-03-21 | 2019-03-21 | Be applied to ventilative relief valve of power battery package |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109904367B (en) |
Families Citing this family (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112821005B (en) * | 2019-11-18 | 2024-08-13 | 伊利诺斯工具制品有限公司 | Mounting seat of pressure relief device |
| CN111192989A (en) * | 2020-01-08 | 2020-05-22 | 深圳市欣旺达综合能源服务有限公司 | Battery compartment pressure relief device and battery compartment |
| WO2021253354A1 (en) * | 2020-06-18 | 2021-12-23 | 东莞新能安科技有限公司 | Explosion-proof valve, battery set shell with explosion-proof valve, and battery set |
| CN112066057A (en) * | 2020-09-02 | 2020-12-11 | 广东金悦诚蓄电池有限公司 | Split butt-joint type safety valve of vehicle storage battery |
| CN116134670A (en) * | 2021-06-01 | 2023-05-16 | 宁德时代新能源科技股份有限公司 | End cover assembly, battery cell, battery and power utilization device |
| CN113400889B (en) * | 2021-06-29 | 2023-01-24 | 镇江海姆霍兹传热传动系统有限公司 | Electric vehicle and electric heater, electric cavity and pressure balance structure thereof |
| JP2024500504A (en) * | 2021-08-17 | 2024-01-09 | エルジー エナジー ソリューション リミテッド | Battery packs and devices containing them |
| CN216698634U (en) * | 2022-01-05 | 2022-06-07 | 宁德时代新能源科技股份有限公司 | Exhaust device, battery cell, battery, and power consumption device |
| WO2024078743A1 (en) * | 2022-10-12 | 2024-04-18 | Eaton Intelligent Power Limited | Battery safety valve |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103109413A (en) * | 2011-02-28 | 2013-05-15 | 株式会社杰士汤浅国际 | Lead storage battery and method for manufacturing same |
| JP2013168293A (en) * | 2012-02-16 | 2013-08-29 | Automotive Energy Supply Corp | Explosion-proof valve for battery pack |
| CN204299652U (en) * | 2014-12-18 | 2015-04-29 | 江铃汽车股份有限公司 | A kind of machine oil filling lid |
| CN107178638A (en) * | 2017-07-13 | 2017-09-19 | 芜湖天量电池系统有限公司 | A kind of explosion-proof vent valve |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE102014111041B4 (en) * | 2014-08-04 | 2023-07-06 | Lisa Dräxlmaier GmbH | Degassing valve for degassing a housing, in particular a housing of a battery in a motor vehicle |
-
2019
- 2019-03-21 CN CN201910216523.2A patent/CN109904367B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103109413A (en) * | 2011-02-28 | 2013-05-15 | 株式会社杰士汤浅国际 | Lead storage battery and method for manufacturing same |
| JP2013168293A (en) * | 2012-02-16 | 2013-08-29 | Automotive Energy Supply Corp | Explosion-proof valve for battery pack |
| CN204299652U (en) * | 2014-12-18 | 2015-04-29 | 江铃汽车股份有限公司 | A kind of machine oil filling lid |
| CN107178638A (en) * | 2017-07-13 | 2017-09-19 | 芜湖天量电池系统有限公司 | A kind of explosion-proof vent valve |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109904367A (en) | 2019-06-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109904367B (en) | Be applied to ventilative relief valve of power battery package | |
| EP3306705B1 (en) | Pressure relief mechanism | |
| CN109920953B (en) | Battery pack explosion-proof valve, battery pack and vehicle | |
| CN102934260A (en) | Improved overpressure security vent and exhaust device for a container | |
| CN107178638B (en) | A kind of explosion-proof vent valve | |
| CN107061816A (en) | One kind balance vent valve | |
| CN212690949U (en) | Explosion-proof valve and battery pack with same | |
| EP1928762A4 (en) | A packaging with improved reclosable opening | |
| CN206290787U (en) | One kind balance vent valve | |
| WO2023098827A1 (en) | Pressure relief device, battery pack, and vehicle | |
| CN111834580A (en) | Explosion-proof ventilation valve and power battery pack assembly | |
| CN113594623A (en) | Explosion-proof valve for battery pack | |
| CN210484714U (en) | Balance explosion-proof valve adopting impulse welding blasting type principle | |
| CN105702898A (en) | Quick pressure relief balance valve applied to battery pack | |
| WO2021253354A1 (en) | Explosion-proof valve, battery set shell with explosion-proof valve, and battery set | |
| CN205978682U (en) | Explosion -proof pressure release balanced valve of plastic part of quick installation | |
| CN110848430A (en) | Oil tank isolating valve | |
| CN215771431U (en) | Battery explosion-proof valve, battery and battery pack | |
| CN211629199U (en) | Explosion-proof valve of battery pack | |
| CN208670172U (en) | A kind of novel waterproof air previous explosion-proof valve | |
| CN108758031A (en) | A kind of novel waterproof air previous explosion-proof valve | |
| CN209401672U (en) | A kind of battery case | |
| CN106594339A (en) | Dynamic sealing structure applied to balance breather valve | |
| CN212616567U (en) | Limit explosion-proof ventilation valve | |
| CN221176550U (en) | Explosion-proof balance valve of preventing kick-backing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |