CN116792541A - Explosion-proof valve, battery system and vehicle - Google Patents

Explosion-proof valve, battery system and vehicle Download PDF

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Publication number
CN116792541A
CN116792541A CN202210265339.9A CN202210265339A CN116792541A CN 116792541 A CN116792541 A CN 116792541A CN 202210265339 A CN202210265339 A CN 202210265339A CN 116792541 A CN116792541 A CN 116792541A
Authority
CN
China
Prior art keywords
hole
sealing
explosion
chamber
valve body
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.)
Pending
Application number
CN202210265339.9A
Other languages
Chinese (zh)
Inventor
许志明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Shanghai Jidu Automobile Co Ltd
Original Assignee
Shanghai Jidu Automobile Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Shanghai Jidu Automobile Co Ltd filed Critical Shanghai Jidu Automobile Co Ltd
Priority to CN202210265339.9A priority Critical patent/CN116792541A/en
Publication of CN116792541A publication Critical patent/CN116792541A/en
Pending legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/0486—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with mechanical actuating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/164—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side and remaining closed after return of the normal pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K27/00—Construction of housing; Use of materials therefor
    • F16K27/08—Guiding yokes for spindles; Means for closing housings; Dust caps, e.g. for tyre valves
    • 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
    • H01M50/20—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders
    • H01M50/249—Mountings; Secondary casings or frames; Racks, modules or packs; Suspension devices; Shock absorbers; Transport or carrying devices; Holders specially adapted for aircraft or vehicles, e.g. cars or trains
    • 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
    • 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

Abstract

The application provides an explosion-proof valve, a battery system and a vehicle, wherein the explosion-proof valve comprises a valve body, a first sealing element, a second sealing element and a first elastic element, wherein an accommodating cavity is formed in the valve body, the accommodating cavity is divided into a first cavity and a second cavity by the first sealing element, the first cavity is communicated with a first gas channel on the valve body, a first through hole and a second through hole are formed in the first sealing element, the first through hole is communicated with the first cavity and the second cavity, the second sealing element is arranged in the first cavity and can seal or open the second through hole, and when the second through hole is opened by the second sealing element, the second through hole is communicated with the second cavity and the second gas channel. The explosion-proof valve provided by the application can prevent water and moisture.

Description

Explosion-proof valve, battery system and vehicle
Technical Field
The application relates to the technical field of explosion prevention, in particular to an explosion-proof valve, a battery system and a vehicle.
Background
With the development of battery technology, the use of batteries is expanding, and batteries are used as power in more and more scenes, such as hybrid electric vehicles and pure electric vehicles.
Generally, the battery core can generate heat in the working process, so that the air pressure in the sealed box body for placing the battery core is increased, the normal working of the battery can be influenced, and when the air pressure is increased to a certain value, the risks of explosion and fire can exist.
At present, an exhaust port is usually formed in a box body for placing the battery cell, and gas in the box body is timely discharged, but the existence of the exhaust port can enable substances such as external water, salt dew and the like to enter the box body to corrode the battery cell, so that the problems of short circuit, abnormal insulation and the like of the battery cell electric appliance are caused, and the normal operation of the battery cell is influenced.
Disclosure of Invention
The application provides an explosion-proof valve, a battery system and a vehicle.
According to one aspect of the application, there is provided an explosion-proof valve comprising a valve body, a first sealing member, a second sealing member and a first elastic member, wherein the valve body is provided with a containing chamber, and a first gas channel and a vent are formed in the valve body;
the first sealing piece is connected with the inner wall of the accommodating chamber and divides the accommodating chamber into a first chamber and a second chamber, the first chamber is communicated with the first gas channel, a first through hole and a second through hole are formed in the first sealing piece, and the first through hole is communicated with the first chamber and the second chamber;
the second sealing piece is arranged in the first cavity and is provided with a second gas channel communicated with the air vent;
the second sealing piece can close or open the second through hole, and when the second sealing piece opens the second through hole, the second through hole is communicated with the second chamber and the second gas channel.
Optionally, the valve further comprises a first elastic member, the second sealing member is in contact with or connected with the first elastic member, the second sealing member is elastically connected with the valve body through the first elastic member, and the second sealing member can close or open the second through hole based on the action of air pressure in the second cavity and/or the elasticity of the first elastic member.
Optionally, the second seal member includes a first seal portion in contact with or connected to the first resilient member, the first seal portion being movable between a first position and a second position based on the action of air pressure within the second chamber and/or the resilience of the first resilient member;
wherein the second seal closes the second through hole when the first seal is in the first position, and opens the second through hole when the first seal is in the second position.
Optionally, the second sealing element further comprises a first telescopic part connected with the first sealing part, and a first step surface is formed at the connection part of the first sealing part and the first telescopic part;
the first telescopic part is connected with the valve body, the first elastic piece is sleeved on the first telescopic part, one end of the first elastic piece is abutted to the valve body, and the other end of the first elastic piece is abutted to the first step surface;
Wherein the first expansion and contraction part can expand and contract based on the action of air pressure in the second cavity and/or the elastic force of the first elastic piece so as to enable the first sealing part to move between the first position and the second position.
Optionally, the first sealing member is further provided with a third through hole;
the explosion-proof valve further includes:
the third sealing piece is arranged in the second cavity and can close or open the third through hole, and when the third sealing piece opens the third through hole, the third through hole is communicated with the second cavity and the second gas channel.
Optionally, the valve further comprises a second elastic member, the third sealing member is in contact with or connected with the second elastic member, the third sealing member is elastically connected with the valve body through the second elastic member, and the third sealing member can close or open the third through hole based on the action of air pressure in the second air channel and/or the elasticity of the second elastic member.
Optionally, the third seal member includes a second seal portion in contact with or connected to the second elastic member, the second seal portion being movable between a third position and a fourth position based on the action of gas pressure within the second gas passage and/or the elastic force of the second elastic member;
Wherein the third seal closes the third through hole when the second seal is in the third position, and opens the third through hole when the second seal is in the fourth position.
Optionally, the third sealing element further comprises a second telescopic part connected with the second sealing part, and a second step surface is formed at the connection part of the second sealing part and the second telescopic part;
the second telescopic part is connected with the valve body, the second elastic piece is sleeved on the second telescopic part, one end of the second elastic piece is abutted with the valve body, and the other end of the second elastic piece is abutted with the second step surface;
wherein the second expansion and contraction part can expand and contract based on the action of air pressure in the second air channel and/or the elastic force of the second elastic piece so as to enable the second sealing part to move between the third position and the fourth position.
Optionally, the first sealing member includes a tapered portion and a connecting portion disposed around the tapered portion, the tapered portion being connected to an inner wall of the accommodating chamber through the connecting portion, a cross-sectional diameter of an end of the tapered portion connected to the connecting portion being larger than a cross-sectional diameter of an end of the tapered portion remote from the connecting portion;
The connecting part is provided with the first through hole, and the conical part is provided with the second through hole and the third through hole.
Optionally, a first accommodating groove is concavely formed at one end of the second sealing element, which is close to the first sealing element, the first accommodating groove is used for accommodating the conical part, the groove wall of the first accommodating groove is attached to the outer wall of the conical part, and the first accommodating groove is communicated with the second gas channel.
Optionally, a second accommodating groove is concavely formed at one end, connected with the connecting part, of the conical part, and the second accommodating groove is used for accommodating the third sealing element.
Optionally, the method further comprises:
the waterproof breathable film is arranged at one end, away from the first sealing piece, of the second gas channel.
Optionally, the method further comprises:
the fixing base, the protruding boss that is formed with in fixing base middle part, the boss embedding in the second gas passage is kept away from in the one end of first sealing member, the fixing base cavity forms the third gas passage, the third gas passage with second gas passage with the vent intercommunication, waterproof ventilated membrane is located the fixing base is kept away from one side of second gas passage.
Optionally, the valve body includes valve body and valve gap, the valve body is formed with hold the cavity, the valve gap lid is located on the valve body, the inboard edge of valve gap with be formed with two piece at least connecting bars between the outside edge of valve body, adjacent be formed with between the connecting bar the first gas passage.
According to another aspect of the present application, there is provided a battery system including the explosion-proof valve provided by the present application.
According to another aspect of the present application, there is provided a vehicle including the battery system provided by the present application.
In the application, under the condition that the pressure difference between the inside and the outside of the battery system is in a normal range, the second sealing piece can seal the second through hole, the gas inside and the outside of the battery system can not flow, the battery system is in a sealing state, water, salt dew or air with water vapor and the like outside the battery system can be prevented from entering the battery system, and the risks of electric short circuit, abnormal insulation, voltage acquisition, temperature faults and the like of the battery management system (Battery Management System, BMS) are reduced.
In addition, when the explosion-proof valve is opened due to the gradual rise of the internal air pressure of the battery system, the second through hole is opened by the second sealing piece, and air in the battery system can be discharged through the second through hole, the second air channel and the air vent, so that the air discharge and the pressure relief in the battery system are realized, the internal air pressure and the external air pressure of the battery system are balanced, and the risk of explosion of the battery system is reduced. In addition, in the pressure release process, gas can not be directly discharged from the vent, but is discharged through the first gas channel, the first chamber, the first through hole, the second chamber, the second gas channel and the vent, so that the speed of the pressure release of the exhaust gas can be slowed down, the impact force on components or personnel outside the battery system is reduced, and the safety of the pressure release of the exhaust gas is improved.
It should be understood that the description in this section is not intended to identify key or critical features of the embodiments of the application or to delineate the scope of the application. Other features of the present application will become apparent from the description that follows.
Drawings
The drawings are included to provide a better understanding of the present application and are not to be construed as limiting the application. Wherein:
fig. 1 is a schematic perspective view of a battery system according to an embodiment of the present application;
FIG. 2 is a schematic cross-sectional view of an explosion-proof valve according to an embodiment of the present application;
FIG. 3 is a schematic diagram of an explosion structure of an explosion-proof valve according to an embodiment of the present application;
fig. 4 is a schematic perspective view of an explosion-proof valve according to an embodiment of the present application;
fig. 5 is a schematic cross-sectional view of a battery system according to an embodiment of the present application;
FIG. 6 is a schematic diagram showing a second perspective view of an explosion-proof valve according to an embodiment of the present application;
fig. 7 is a schematic diagram of gas flow through an explosion-proof valve in a positive pressure exhaust state according to an embodiment of the present application;
FIG. 8 is a second schematic cross-sectional view of an explosion-proof valve according to an embodiment of the present application;
FIG. 9 is a schematic diagram of gas flow through an explosion-proof valve in a negative pressure air suction state according to an embodiment of the present application;
Fig. 10 is a third schematic cross-sectional view of an explosion-proof valve according to an embodiment of the present application.
Detailed Description
Exemplary embodiments of the present application will now be described with reference to the accompanying drawings, in which various details of the embodiments of the present application are included to facilitate understanding, and are to be considered merely exemplary. Accordingly, those of ordinary skill in the art will recognize that various changes and modifications of the embodiments described herein can be made without departing from the scope and spirit of the application. Also, descriptions of well-known functions and constructions are omitted in the following description for clarity and conciseness.
The embodiment of the application firstly provides an explosion-proof valve.
It should be noted that the application scenario of the explosion-proof valve is not limited, for example, the explosion-proof valve may be applied to a battery system, and as shown in fig. 1, the explosion-proof valve 100 may be disposed on a housing 200 of the battery system. The explosion-proof valve can also be applied to other closed systems possibly containing flammable and explosive gases inside, and can be specifically determined according to actual requirements. The explosion-proof valve provided by the embodiment of the application is described by taking the application of the explosion-proof valve to a battery system as an example.
As shown in fig. 2, the explosion-proof valve provided in the embodiment of the present application includes: a valve body 1, a first seal 2, a second seal 3 and a first elastic member 4. The valve body 1 may be sealingly connected to the housing of the battery system. The valve body 1 is formed with a containing chamber, the first sealing member 2 is connected with the inner wall of the containing chamber, the containing chamber is divided into a first chamber 101 and a second chamber 102, a first gas channel 11 is formed in the valve body 1, the first gas channel 11 is used for communicating the inside of the battery system with the first chamber 101, and the inside of the battery system and the first chamber 101 can be in gas communication through the first gas channel 11.
The first sealing member 2 is provided with a first through hole 21 and a second through hole 22, the first through hole 21 is communicated with the first chamber 101 and the second chamber 102, and the first chamber 101 and the second chamber 102 can be communicated with each other through the first through hole 21.
The second sealing member 3 is arranged in the first chamber 101, the second sealing member 3 is provided with a second gas channel 31, the valve body 1 is also provided with a vent 12, the second gas channel 31 is communicated with the vent 12, the vent 12 is used for communicating the outside of the battery system with the second gas channel 31, and the outside of the battery system and the second gas channel 31 can be in gas communication through the vent 12. The second sealing member 3 may close or open the second through hole 22, and when the second sealing member 3 opens the second through hole 22, the second through hole 22 may communicate the second chamber 102 with the second gas channel 31, and thus the second chamber 102 may be in gas communication with the outside of the battery system through the second gas channel 31 and the vent 12.
In the embodiment of the present application, the gas inside the battery system may enter the first chamber 101 through the first gas channel 11 and enter the second chamber 102 through the first through hole 21. The portion of the gas that enters the second chamber 102 may pre-relieve the pressure of the internal gas pressure of the battery system against the battery system housing before the explosion-proof valve opens, slowing the rate of rise of the internal gas pressure of the battery system.
Under the condition that the pressure difference between the inside and the outside of the battery system is in a normal range, the second sealing piece 3 seals the second through hole 22, gas in the battery system and the outside of the battery system cannot circulate, the battery system is in a sealing state, water, salt dew or air with water vapor and the like outside the battery system can be prevented from entering the battery system, and the risks of electric short circuit, abnormal insulation, voltage acquisition, temperature faults and the like of the battery system are reduced.
Under the condition that the internal pressure of the battery system is increased due to the increase of the working temperature or the internal pressure and the external pressure of the battery system are reduced to cause the abnormality of the internal pressure and the external pressure of the battery system, the internal pressure of the battery system meets the first opening condition of the explosion-proof valve, the second sealing piece 3 opens the second through hole 22, the gas in the second chamber 102 can enter the second gas channel 31 through the second through hole 22 and is discharged through the vent 12, so that the internal pressure and the external pressure of the battery system are balanced, and the risk of explosion of the battery system is reduced. This case can be regarded as a state of positive pressure exhaust of the explosion-proof valve. In the process of opening the explosion-proof valve to exhaust, the gas exhausted outwards needs to be exhausted outside the battery system through the first gas channel 11, the first chamber 101, the first through hole 21, the second chamber 102, the second through hole 22, the second gas channel 31 and the air vent 12, so that the speed of exhausting and releasing pressure can be reduced, the impact force on components or personnel outside the battery system can be reduced, and the safety of exhausting and releasing pressure is improved.
It should be noted that, in the embodiment of the present application, the manner in which the second sealing member 3 closes or opens the second through hole 22 is not limited, and the second sealing member 3 may, for example, close or open the second through hole 22 under the control of the controller, and the controller may obtain the internal air pressure of the battery system through the sensor, and control the second sealing member 3 to open the second through hole 22 when the internal air pressure of the battery system satisfies the first opening condition of the explosion-proof valve. Alternatively, the second sealing member 3 may close or open the second through hole 22 under the driving force of the driving mechanism, for example, under the elastic force of the elastic member.
The specific structure of the explosion-proof valve provided by the embodiment of the application is further described below:
in the embodiment of the application, the explosion-proof valve can be in sealing connection with the shell of the battery system through the valve body 1.
In an alternative embodiment, as shown in fig. 3 and 4, the valve body 1 may include a valve body 13 and a valve cover 14, the valve body 13 is formed with a receiving chamber, the valve cover 14 is covered on the valve body 13, and the valve cover 14 is connected with the valve body 13.
In this embodiment, the valve cover 14 may be provided with a connection portion for connection with the housing of the battery system, as shown in fig. 5. In a specific example, as shown in fig. 3 and 4, the outer circumference of the valve cover 14 may be relatively provided with two side connection parts 141, the side connection parts 141 may be provided with mounting holes 1411, and locking members such as screws, bolts, etc. may be inserted into the housing of the battery system after passing through the mounting holes 1411, so that the connection of the explosion-proof valve with the housing of the battery system may be achieved. Optionally, sealing elements such as a sealing ring, a sealing glue layer, etc. may be disposed at the position where the valve cover 14 forms the side connection portion 141, so that the explosion-proof valve is in sealing connection with the housing of the battery system, which may be specifically determined according to practical requirements, and is not specifically limited herein.
The valve body 13 may be provided with a first gas passage 11. The implementation form of the first gas channel 11 is not limited in this embodiment of the present application, for example, a through hole penetrating through the side wall is formed on the side wall of the valve body 13 to form the first gas channel 11, or, for example, at least two connecting ribs are formed between the inner edge of the valve cover 14 and the outer edge of the valve body 13, and the first gas channel 11 is formed between the adjacent connecting ribs, so that the connection between the valve body 13 and the valve cover 14 can be realized, and no additional gas channel is required to be formed on the valve body 13.
Vent 12 may be provided in valve cover 14. The implementation form of the vent 12 is not limited in this embodiment, for example, the valve cover 14 may be provided with a plurality of vent holes arranged in an array, or, for example, as shown in fig. 6, the valve cover 14 may be provided with a linear through groove extending along an edge of the valve cover 14 to form the vent 12, and in the case that the body of the valve cover 14 is in a shape of a circular cake, the vent 12 may be formed by an annular through groove. In this way, stones, large particle dust and the like can be prevented from entering the valve body 1 through the air vent 12, and the normal operation of the explosion-proof valve is prevented from being influenced.
In the embodiment of the present application, the second sealing member 3 may be movably disposed in the first chamber 101 to close or open the second through hole 22 by a change in position. The second seal 3 may be fixedly provided in the first chamber 101 to close or open the second through hole 22 by a change of state.
In an alternative embodiment, as shown in fig. 2, the explosion protection valve further comprises a first elastic member 4, and the second sealing member 3 may be elastically connected to the valve body 1 by the first elastic member 4, for example, the first elastic member 4 may be compressed between the second sealing member 3 and the valve body 1. The first elastic member 4 may be in contact with or connected to the second sealing member 3, and the second sealing member 3 may close or open the second through hole 22 based on the pneumatic pressure in the second chamber 102 and/or the elastic force of the first elastic member 4.
In this embodiment, the first elastic member 4 has a limiting effect on the second sealing member 3, and when the air pressure in the second chamber 102 is smaller than the elastic force of the first elastic member 4, the air in the second chamber 102 cannot drive the second sealing member 3 to move or change the state, and the second sealing member 3 can close the second through hole 22. When the air pressure in the second chamber 102 gradually increases to be greater than the elastic force of the first elastic member 4, the air pressure in the second chamber 102 may drive the second sealing member 3 to move or change the state, and the second sealing member 3 may open the second through hole 22. When the pressure in the second chamber 102 is reduced to be smaller than the elastic force of the first elastic member 4 by the pressure release, the elastic force of the first elastic member 4 can drive the second sealing member 3 to move or change the state so as to reclose the second through hole 22.
In particular, the second sealing member 3 may move along the axial direction of the second through hole 22, and close or open the second through hole 22 by approaching or separating from the second through hole 22 based on the action of the air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4; alternatively, the second sealing member 3 may also move in the radial direction of the second through hole 22, closing or opening the second through hole 22 by covering or uncovering the second through hole 22 based on the action of the air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4; alternatively, the second sealing member 3 may also close or open the second through hole 22 by overturning the second through hole 22 to cover or uncover the second through hole 22 based on the action of the air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4, which may be specifically determined according to the actual requirement and is not specifically limited herein.
In an alternative embodiment, the second sealing member 3 comprises a first sealing portion 32, the first sealing portion 32 being in contact with or connected to the first elastic member 4, the first sealing portion 32 being movable between a first position and a second position based on the action of air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4. The second seal 3 closes the second through hole 22 when the first seal 32 is in the first position, and the second seal 3 opens the second through hole 22 when the first seal 32 is in the second position.
In the present embodiment, the first sealing portion 32 is movable in the first chamber 101 by the action of the air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4, for example, movable in the first chamber 101 in a direction parallel to the axial direction of the second through hole 22, and this embodiment is described as an example. As shown in fig. 7, when the air pressure in the second chamber 102 gradually increases to be greater than the elastic force of the first elastic member 4, the air pressure in the second chamber 102 may drive the first sealing part 32 to move downward to the second position, the first elastic member 4 is compressed, the second sealing member 3 may open the second through hole 22, and the air in the battery system may be discharged through the first air passage 11, the first chamber 101, the first through hole 21, the second chamber 102, the second through hole 22, the second air passage 31, and the vent 12 as indicated by the dotted arrows. When the pressure in the second chamber 102 is reduced to be smaller than the elastic force of the first elastic member 4 by the pressure release, the elastic force of the first elastic member 4 can drive the second sealing member 3 to move upwards to the first position so as to close the second through hole 22.
In particular, the first sealing portion 32 may be movably connected to the valve body 1, and in an alternative embodiment, as shown in fig. 7, the second sealing member 3 further includes a first telescopic portion 33 connected to the first sealing portion 32, so that the telescopic structure is simple in design and does not occupy a larger space in the first chamber 101. The first expansion and contraction portion 33 is connected to the valve body 1, and specifically, an end of the first expansion and contraction portion 33 remote from the first seal member 2 is connected to the valve body 1. The first expansion and contraction part 33 may be connected to or contact with the first elastic member 4, and the first expansion and contraction part 33 may expand and contract based on the air pressure in the second chamber 102 and/or the elastic force of the first elastic member 4, so that the first sealing part 32 moves between the first position and the second position.
In a specific example, as shown in fig. 7, a first step surface is formed at a connection portion between the first sealing portion 32 and the first expansion portion 33, one end of the first elastic member 4 may abut against the valve body 1, and the other end of the first elastic member 4 may abut against the first step surface.
The elastic coefficient of the first elastic member 4 may be determined based on the first opening condition of the explosion-proof valve. Alternatively, the first opening condition may include a first opening pressure value, and when the air pressure in the second chamber 102 is greater than the first opening pressure value, the first sealing portion 32 may be pushed and the first expansion and contraction portion 33 may be driven to be shortened. The maximum elastic force generated by the first elastic member 4 may be less than or equal to the first opening pressure value.
The first elastic member 4 may be a spring or a leaf spring. Under the condition that the first elastic piece 4 is a spring, the first elastic piece 4 can be sleeved on the first telescopic part 33, so that the overall stability of the first elastic piece 4 and the first telescopic part 33 is improved, and the effect of the action of the first elastic piece 4 is improved.
It will be appreciated that the first sealing portion 32 may be movably connected to the valve body 1 by other structures, such as a sliding mechanism, etc., and may be specifically determined according to the actual situation, which is not specifically limited herein.
In practical applications, in addition to the situation that the internal air pressure of the battery system is greater than the external air pressure of the battery system, so that the internal air pressure and the external air pressure of the battery system are unbalanced, the situation that the internal air pressure and the external air pressure of the battery system are smaller than the external air pressure of the battery system, so that the internal air pressure and the external air pressure of the battery system are unbalanced may also occur. In this case, too, the normal operation of the battery system is affected.
In an alternative embodiment, as shown in fig. 8, the first sealing member 2 is further provided with a third through hole 23. The explosion proof valve further comprises a third seal 5, the third seal 5 being provided in the second chamber 102. The third sealing member 5 may close or open the third through hole 23, and when the third sealing member 5 opens the third through hole 23, the third through hole 23 may communicate the second chamber 102 with the second gas channel 31, so that the outside of the battery system may communicate with the inside of the battery system through the second gas channel 31, the vent 12 and the second chamber 102. In the case where the third seal 5 opens the third through hole 23, the second seal 3 may close the second through hole 22.
In the present embodiment, before the explosion-proof valve is opened, the gas outside the battery system can enter the second gas passage 31 through the vent 12. Under the condition that the pressure difference between the inside and the outside of the battery system is in a normal range, the third sealing piece 5 seals the third through hole 23, gas in the battery system and the outside cannot circulate, the battery system is in a sealing state, water and salt dew outside the battery system or air with water vapor and the like can be prevented from entering the battery system, and the risks of electrical short circuit, abnormal insulation, voltage acquisition by the BMS, temperature faults and the like in the battery system are reduced.
When the pressure difference between the inside and the outside is abnormal due to the rise of the air pressure outside the battery system, the air pressure outside the battery system meets the second opening condition of the explosion-proof valve, the third sealing member 5 opens the third through hole 23, and the air in the second air channel 31 can enter the second chamber 102 through the third through hole 23 and enter the inside of the battery system through the first through hole 21 and the first air channel 11, so that the air suction and the pressurization inside the battery system are realized, and the air pressure inside the battery system and the air pressure outside the battery system are balanced. This situation can be considered as a negative pressure suction state of the explosion-proof valve.
It should be noted that, in the embodiment of the present application, the manner in which the third sealing member 5 closes or opens the third through hole 23 is not limited, and the third sealing member 5 may close or open the third through hole 23 under the control of the controller, and the controller may obtain the external air pressure of the battery system through the sensor, and control the third sealing member 5 to open the third through hole 23 when the external air pressure of the battery system satisfies the second opening condition of the explosion-proof valve. Alternatively, the third sealing member 5 may close or open the third through hole 23 under the driving force of the driving mechanism, for example, under the elastic force of the elastic member.
In the present embodiment, the third seal 5 may be movably provided in the second chamber 102, and the third through hole 23 may be closed or opened by a change in position. The third seal 5 may also be fixedly provided in the second chamber 102 to close or open the second through hole 22 by a change of state.
In an alternative embodiment, as shown in fig. 8, the explosion protection valve further comprises a second elastic member 6, and the third sealing member 5 may be elastically connected to the valve body 1 by the second elastic member 6, for example, the second elastic member 6 may be compressed between the third sealing member 5 and the valve body 1. The second elastic member 6 may be in contact with or connected to the third sealing member 5, and the third sealing member 5 may close or open the third through hole 23 based on the gas pressure in the second gas passage 31 and/or the elastic force of the second elastic member 6.
In this embodiment, the second elastic member 6 has a limiting effect on the third sealing member 5, and when the air pressure in the second air passage 31 is smaller than the elastic force of the second elastic member 6, the air in the second air passage 31 cannot drive the third sealing member 5 to move or change the state, and the third sealing member 5 can close the third through hole 23. When the air pressure in the second air passage 31 gradually increases to be greater than the elastic force of the second elastic member 6, the air pressure in the second air passage 31 may drive the third sealing member 5 to move or change state, and the third sealing member 5 may open the third through hole 23. When the pressure in the second gas channel 31 is reduced to be smaller than the elastic force of the second elastic member 6 due to the pressurization of the suction gas, the elastic force of the second elastic member 6 can drive the third sealing member 5 to move or change the state so as to reclose the third through hole 23.
In particular, the third sealing member 5 may move in the axial direction of the third through hole 23, closing or opening the third through hole 23 by approaching or separating from the third through hole 23 based on the action of the gas pressure in the second gas passage 31 and/or the elastic force of the second elastic member 6; alternatively, the third sealing member 5 may also be moved in the radial direction of the third through hole 23 to close or open the third through hole 23 by covering or uncovering the third through hole 23 based on the action of the gas pressure in the second gas passage 31 and/or the elastic force of the second elastic member 6; alternatively, the third sealing member 5 may also close or open the third through hole 23 by flipping to cover or uncover the third through hole 23 based on the action of the air pressure in the second air passage 31 and/or the elastic force of the second elastic member 6, which may be specifically determined according to actual needs and is not specifically limited herein.
In an alternative embodiment, as shown in fig. 9, the third sealing member 5 includes a second sealing portion 51, the second sealing portion 51 being in contact with or connected to the second elastic member 6, the second sealing portion 51 being movable between the third position and the fourth position based on the action of the gas pressure in the second gas passage 31 and/or the elastic force of the second elastic member 6. The third seal 5 closes the third through hole 23 when the second seal portion 51 is located at the third position, and the third seal 5 opens the third through hole 23 when the second seal portion 51 is located at the fourth position.
In the present embodiment, the second sealing portion 51 is movable in the first chamber 101 by the action of the gas pressure in the second gas passage 31 and/or the elastic force of the second elastic member 6, for example, movable in the second chamber 102 in a direction parallel to the axial direction of the third through hole 23, and this embodiment is described by way of example. As shown in fig. 9, when the air pressure in the second air passage 31 gradually increases to be greater than the elastic force of the second elastic member 6, the air pressure in the second air passage 31 may drive the second sealing part 51 to move upward to the fourth position, the second elastic member 6 is compressed, the third sealing member 5 may open the third through-hole 23, and the air outside the battery system may enter the inside of the battery system through the air vent 12, the second air passage 31, the third through-hole 23, the second chamber 102, the first through-hole 21, the first chamber 101, the first air passage 11 as indicated by the dotted arrow. When the pressure in the second gas passage 31 is reduced to be smaller than the elastic force of the second elastic member 6 by the suction pressurization, the elastic force of the second elastic member 6 can drive the third sealing member 5 to move downward to the third position to close the third through hole 23.
In particular, the second sealing portion 51 may be movably connected to the valve body 1, and in an alternative embodiment, as shown in fig. 9, the third sealing member 5 includes a second telescopic portion 52 connected to the second sealing portion 51, so that the telescopic structure is simple in design and does not occupy a large space in the second chamber 102. The second expansion and contraction portion 52 is connected to the valve body 1, and specifically, an end of the second expansion and contraction portion 52 remote from the first seal member 2 is connected to the valve body 1. The second expansion and contraction part 52 may be connected to or contact with the second elastic member 6, and the second expansion and contraction part 52 may expand and contract based on the air pressure in the second air passage 31 and/or the elastic force of the second elastic member 6 to move the second sealing part 51 between the third position and the fourth position.
In a specific example, as shown in fig. 9, a second step surface is formed at the connection portion of the second sealing portion 51 and the second expansion portion 52, and one end of the second elastic member 6 may abut against the valve body 1, and the other end of the second elastic member 6 may abut against the second step surface.
The elastic coefficient of the second elastic member 6 may be determined based on the second opening condition of the explosion-proof valve. Alternatively, the second opening condition may include a second opening pressure value, and when the air pressure in the second air passage 31 is greater than the second opening pressure value, the second sealing portion 51 may be pushed and the second expansion portion 52 may be driven to be shortened, and the maximum elastic force generated by the second elastic member 6 may be less than or equal to the second opening pressure value.
The second elastic member 6 may be a spring or a leaf spring. In the case that the second elastic member 6 is a spring, the second elastic member 6 may be sleeved on the second telescopic portion 52, so as to improve the overall stability of the second elastic member 6 and the second telescopic portion 52, and improve the effect of the second elastic member 6.
It will be appreciated that the second sealing portion 51 may be movably connected to the valve body 1 by other structures, such as a sliding mechanism, etc., and may be specifically determined according to the actual situation, which is not specifically limited herein.
In an alternative embodiment, as shown in fig. 3 and 10, the first sealing member 2 includes a tapered portion 24 and a connecting portion 25 provided around the tapered portion 24, the tapered portion 24 being connected to an inner wall of the accommodating chamber through the connecting portion 25, and a cross-sectional diameter of an end of the tapered portion 24 connected to the connecting portion 25 being larger than a cross-sectional diameter of an end of the tapered portion remote from the connecting portion, that is, the tapered portion 24 protrudes out of the first chamber 101 with a horizontal plane in which the connecting portion 25 is located as a dividing line.
In the present embodiment, the connection portion 25 is provided with a first through hole 21. The embodiment of the present application is not limited to the implementation manner of the first through hole 21, and in a specific example, the connection portion 25 includes at least two connection ribs between the edge of the tapered portion 24 and the inner wall of the accommodating chamber, and the first through hole 21 may be formed between two adjacent connection ribs. The extending direction of the connecting portion 25 may be perpendicular to the inner wall of the accommodating chamber, or may be a predetermined angle, which is not particularly limited herein.
The tapered portion 24 is provided with a second through hole 22 and a third through hole 23. The implementation manner of the second through hole 22 and the third through hole 23 is not limited in this embodiment of the present application, in a specific example, the second through hole 22 is formed on the side wall of the tapered portion 24, and the third through hole 23 is formed at the bottom of the tapered portion 24.
In order to achieve the effect that the second seal 3 can close or open the second through hole 22, in the case where the second through hole 22 is opened on the side wall of the tapered portion 24, the side of the second seal 3 close to the first seal 2 may be designed in a shape that is adapted to the tapered portion 24. In an alternative embodiment, as shown in fig. 10, a first receiving groove 34 communicating with the second gas channel 31 is concavely formed at one end of the second sealing member 3 near the first sealing member 2, the first receiving groove 34 is used for receiving the conical portion 24, and the groove wall of the first receiving groove 34 is attached to the outer wall of the conical portion 24, so that not only the sealing effect of the second sealing member 3 can be improved, but also the overall dimension of the explosion-proof valve in the height direction can be shortened. Optionally, sealing elements such as a sealing ring, a sealing glue layer, etc. may be disposed at the position where the notch of the first accommodating groove 34 is attached to the tapered portion 24, so as to further improve the sealing effect of the second sealing element 3, which may be specifically determined according to practical requirements, and is not specifically limited herein.
In an alternative embodiment, as shown in fig. 10, the end of the tapered portion 24 connected to the connecting portion 25 is concavely formed with a second receiving groove 241, and the second receiving groove 241 is used for receiving the third sealing member 5. This can not only improve the sealing effect of the third seal 5, but also further shorten the dimension of the explosion-proof valve as a whole in the height direction. Optionally, sealing elements such as a sealing ring and a sealing glue layer may be disposed at a position where the notch of the second accommodating groove 241 is attached to the inner wall of the second accommodating groove 241, so as to further improve the sealing effect of the third sealing element 5, which may be specifically determined according to actual requirements, and is not specifically limited herein.
In the embodiment of the application, no matter in a positive pressure exhaust state or a negative pressure suction state, gas needs to pass through the air vent 12 and the second gas channel 31, so as to prevent substances such as water, salt dew and the like outside the battery system from entering the battery system in the exhaust or suction process, and the explosion-proof valve can be provided with a layer of waterproof breathable film so as to achieve the dual effects of waterproof and breathable.
In particular, in an alternative embodiment, as shown in fig. 2 and 3, the waterproof and breathable film 7 is disposed at one end of the second gas channel 31 away from the first sealing member 2, so that the waterproof and breathable film 7 is convenient to fix, and substances such as water, salt dew and the like can be blocked at a position away from the first sealing member 2, so as to avoid substances such as salt dew and the like corroding the sealing member, or block the first through hole 21, the second through hole 22 or the third through hole 23, and influence the working effect of the explosion-proof valve.
In order to further enhance the stability of the waterproof and breathable membrane 7, in an alternative embodiment, as shown in fig. 2 and 3, the waterproof and breathable membrane may be fixed by a fixing seat 8, and a third gas channel 81 is formed in the fixing seat 8, so as to communicate with the second gas channel 31 to ensure gas circulation. The waterproof ventilated membrane 7 can bond in fixing base 8 one side of being away from first sealing member 2, and fixing base 8 one side towards first sealing member 2 can be equipped with the boss to in the one end of keeping away from first sealing member 2 of embedding second gas passage 31, further strengthen the connection steadiness between fixing base 8 and the second sealing member 3.
The embodiment of the application also provides a battery system, which comprises the explosion-proof valve provided by the embodiment of the application.
It should be noted that, the implementation of the embodiment of the explosion-proof valve is also applicable to the embodiment of the battery system, and the same technical effects can be achieved, which is not described herein.
The embodiment of the application also provides a vehicle, which comprises the battery system provided by the embodiment of the application, namely the explosion-proof valve provided by the embodiment of the application. It should be noted that, the implementation of the embodiment of the explosion-proof valve is also applicable to the embodiment of the vehicle, and the same technical effects can be achieved, which is not described herein.
It should be noted that, the various alternative embodiments described in the embodiments of the present application may be implemented in combination with each other, or may be implemented separately, which is not limited to the embodiments of the present application.
In the description of the present application, it should be understood that the terms "upper," "lower," "left," "right," and the like indicate an orientation or a positional relationship based on that shown in the drawings, and are merely for convenience of description and for simplifying the description, and do not indicate or imply that the apparatus or element in question must have a specific orientation, as well as a specific orientation configuration and operation, and thus should not be construed as limiting the present application. Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include one or more such feature. In the description of the present application, unless otherwise indicated, the meaning of "a plurality" is two or more.
While the foregoing is directed to the preferred embodiments of the present application, it will be appreciated by those skilled in the art that various modifications and changes can be made without departing from the principles of the present application, and such modifications and changes are intended to be within the scope of the present application.

Claims (16)

1. The explosion-proof valve is characterized by comprising a valve body, a first sealing piece and a second sealing piece, wherein the valve body is provided with a containing cavity, and a first gas channel and a vent are formed in the valve body;
the first sealing piece is connected with the inner wall of the accommodating chamber and divides the accommodating chamber into a first chamber and a second chamber, the first chamber is communicated with the first gas channel, a first through hole and a second through hole are formed in the first sealing piece, and the first through hole is communicated with the first chamber and the second chamber;
the second sealing piece is arranged in the first cavity and is provided with a second gas channel communicated with the air vent;
the second sealing piece can close or open the second through hole, and when the second sealing piece opens the second through hole, the second through hole is communicated with the second chamber and the second gas channel.
2. The explosion-proof valve according to claim 1, further comprising a first elastic member, wherein the second sealing member is in contact with or connected to the first elastic member, wherein the second sealing member is elastically connected to the valve body through the first elastic member, and wherein the second sealing member can close or open the second through hole based on an air pressure action in the second chamber and/or an elastic force of the first elastic member.
3. The explosion protection valve according to claim 2, wherein the second seal comprises a first seal portion in contact with or connected to the first resilient member, the first seal portion being movable between a first position and a second position based on the action of air pressure within the second chamber and/or the resilience of the first resilient member;
wherein the second seal closes the second through hole when the first seal is in the first position, and opens the second through hole when the first seal is in the second position.
4. The explosion protection valve according to claim 3, wherein the second sealing member further comprises a first expansion portion connected with the first sealing portion, and a first step surface is formed at a connection position of the first sealing portion and the first expansion portion;
The first telescopic part is connected with the valve body, the first elastic piece is sleeved on the first telescopic part, one end of the first elastic piece is abutted to the valve body, and the other end of the first elastic piece is abutted to the first step surface;
wherein the first expansion and contraction part can expand and contract based on the action of air pressure in the second cavity and/or the elastic force of the first elastic piece so as to enable the first sealing part to move between the first position and the second position.
5. The explosion-proof valve of claim 1, wherein the first seal is further provided with a third through hole;
the explosion-proof valve further includes:
the third sealing piece is arranged in the second cavity and can close or open the third through hole, and when the third sealing piece opens the third through hole, the third through hole is communicated with the second cavity and the second gas channel.
6. The explosion-proof valve according to claim 5, further comprising a second elastic member, wherein the third sealing member is in contact with or connected to the second elastic member, and the third sealing member is elastically connected to the valve body through the second elastic member, and the third sealing member can close or open the third through hole based on the action of the gas pressure in the second gas passage and/or the elastic force of the second elastic member.
7. The explosion proof valve of claim 6, wherein the third seal comprises a second seal portion in contact with or connected to the second resilient member, the second seal portion being movable between a third position and a fourth position based on the action of gas pressure within the second gas passage and/or the resilience of the second resilient member;
wherein the third seal closes the third through hole when the second seal is in the third position, and opens the third through hole when the second seal is in the fourth position.
8. The explosion protection valve according to claim 7, wherein the third sealing member further comprises a second expansion portion connected with the second sealing portion, and a second step surface is formed at a connection position of the second sealing portion and the second expansion portion;
the second telescopic part is connected with the valve body, the second elastic piece is sleeved on the second telescopic part, one end of the second elastic piece is abutted with the valve body, and the other end of the second elastic piece is abutted with the second step surface;
wherein the second expansion and contraction part can expand and contract based on the action of air pressure in the second air channel and/or the elastic force of the second elastic piece so as to enable the second sealing part to move between the third position and the fourth position.
9. The explosion-proof valve according to claim 5, wherein the first seal member includes a tapered portion and a connecting portion provided around the tapered portion, the tapered portion being connected to an inner wall of the accommodating chamber through the connecting portion, a cross-sectional diameter of an end of the tapered portion connected to the connecting portion being larger than a cross-sectional diameter of an end of the tapered portion remote from the connecting portion;
the connecting part is provided with the first through hole, and the conical part is provided with the second through hole and the third through hole.
10. The explosion-proof valve according to claim 9, wherein a first accommodating groove is formed in the end, close to the first sealing piece, of the second sealing piece in a recessed mode, the first accommodating groove is used for accommodating the conical portion, the groove wall of the first accommodating groove is attached to the outer wall of the conical portion, and the first accommodating groove is communicated with the second gas channel.
11. The explosion-proof valve according to claim 9, wherein a second receiving groove is concavely formed at an end of the tapered portion connected to the connecting portion, the second receiving groove being for receiving the third sealing member.
12. The explosion protection valve of claim 1, further comprising:
The waterproof breathable film is arranged at one end, away from the first sealing piece, of the second gas channel.
13. The explosion proof valve of claim 12, further comprising:
the fixing base, the protruding boss that is formed with in fixing base middle part, the boss embedding in the second gas passage is kept away from in the one end of first sealing member, the fixing base cavity forms the third gas passage, the third gas passage with second gas passage with the vent intercommunication, waterproof ventilated membrane is located the fixing base is kept away from one side of second gas passage.
14. The explosion-proof valve according to claim 1, wherein the valve body comprises a valve body and a valve cover, the valve body is provided with the accommodating chamber, the valve cover is arranged on the valve body, at least two connecting ribs are formed between the inner side edge of the valve cover and the outer side edge of the valve body, and the first gas channel is formed between the adjacent connecting ribs.
15. A battery system comprising the explosion-proof valve according to any one of claims 1 to 14.
16. A vehicle comprising the battery system of claim 15.
CN202210265339.9A 2022-03-17 2022-03-17 Explosion-proof valve, battery system and vehicle Pending CN116792541A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202210265339.9A CN116792541A (en) 2022-03-17 2022-03-17 Explosion-proof valve, battery system and vehicle

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202210265339.9A CN116792541A (en) 2022-03-17 2022-03-17 Explosion-proof valve, battery system and vehicle

Publications (1)

Publication Number Publication Date
CN116792541A true CN116792541A (en) 2023-09-22

Family

ID=88048522

Family Applications (1)

Application Number Title Priority Date Filing Date
CN202210265339.9A Pending CN116792541A (en) 2022-03-17 2022-03-17 Explosion-proof valve, battery system and vehicle

Country Status (1)

Country Link
CN (1) CN116792541A (en)

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