CN220672791U

CN220672791U - Pressure relief device, battery box, battery and electric equipment

Info

Publication number: CN220672791U
Application number: CN202321963093.9U
Authority: CN
Inventors: 苗慧敏; 黄嘉玮
Original assignee: Contemporary Amperex Technology Co Ltd
Current assignee: Contemporary Amperex Technology Co Ltd
Priority date: 2023-07-24
Filing date: 2023-07-24
Publication date: 2024-03-26
Anticipated expiration: 2033-07-24

Abstract

The application relates to the technical field of battery manufacturing, specifically disclose a pressure relief device, battery box, battery and consumer, this pressure relief device includes that pressure relief device includes case and valve body, and the valve body is equipped with the pressure release passageway, and the case sets up on the valve body with mobilizable mode to be used for opening or closing the pressure release passageway, the valve body is equipped with the joint structure, and the joint structure is used for cooperating with the mounting hole joint of battery box, in order to spacing the fixing of pressure relief device on the battery box. When pressure relief device is used for the battery box, with valve body and battery box joint cooperation to realized the equipment of pressure relief device and battery box, compare in bolt installation pressure relief device, can reduce the use of bolt, make the cost obtain reducing effectively, the joint is fixed simultaneously and is compared in bolted connection fixedly, and the assembly is simple and assembly efficiency is high, thereby can effectively reduce pressure relief device's manufacturing cost.

Description

Pressure relief device, battery box, battery and electric equipment

Technical Field

The application relates to the technical field of batteries, in particular to a pressure relief device, a battery box, a battery and electric equipment.

Background

This section provides merely background information related to the present disclosure and is not necessarily prior art.

With the development of new energy, more and more fields adopt new energy as power. The battery is widely applied to the fields of new energy automobiles, consumer electronics, energy storage systems and the like due to the advantages of high energy density, recycling charge, safety, environmental protection and the like.

In the prior art, a pressure relief device is arranged on a battery box body, and the safety of a battery is improved by utilizing the pressure relief device. The existing pressure relief device is installed on the battery box body through bolts, and the cost of the mode of installing the bolts is high.

Disclosure of Invention

In view of the above problems, the application provides a pressure relief device, which solves the problem of high installation cost of the existing pressure relief device.

A first aspect of the present application proposes a pressure relief device, the pressure relief device comprising:

a valve core;

the valve body is provided with a pressure relief channel, the valve core is movably arranged on the valve body and used for opening or closing the pressure relief channel, the valve body is provided with a clamping structure, and the clamping structure is used for being matched with the mounting hole of the battery box body in a clamping manner so as to limit and fix the pressure relief device on the battery box body.

When pressure relief device is used for the battery box, with valve body and battery box joint cooperation to realized the equipment of pressure relief device and battery box, compare in bolt installation pressure relief device, can reduce the use of bolt, make the cost obtain reducing effectively, the joint is fixed simultaneously and is compared in bolted connection fixedly, and the assembly is simple and assembly efficiency is high, thereby can effectively reduce pressure relief device's manufacturing cost.

In some embodiments of the present application, the valve body comprises:

the pressure release channel is arranged on the main body, and the clamping structure comprises a part of the main body which is used for propping against the outer surface of the battery box body;

and one end of the elastic part is connected with the main body part, and the clamping structure further comprises the other end of the elastic part which is used for propping against the inner surface of the battery box body.

Specifically, the elastic part and the main body part are respectively abutted against the two opposite sides of the battery box body, so that the valve body and the battery box body are clamped and fixed, and the pressure relief device is installed. The valve body is simple in structure and low in manufacturing cost, and in addition, the assembly is convenient and rapid, accessories used during assembly are reduced, and therefore the assembly cost is reduced.

In some embodiments of the present application, the elastic portion includes:

One end of the elastic arm is one end of the elastic part, and the elastic arm is arranged to be elastically deformable along the direction perpendicular to the central axis of the pressure release channel;

the limiting body is connected to one end of the limiting body on the other end of the elastic arm, and extends in the direction away from the central axis, the limiting body and one end of the elastic arm are arranged at intervals along the extending direction of the elastic arm, and the other end of the limiting body is the other end of the elastic portion.

When installing pressure relief device, under external force drive, elastic arm takes place elastic deformation to the direction that is close to the central axis of pressure relief passageway, and spacing body can pass the mounting hole of box this moment, treat after spacing body passes the mounting hole, releases external force, and elastic arm resumes elastic deformation, and spacing body supports on the internal surface of battery box this moment, and the partial body of main part supports on the surface of battery box simultaneously. The elastic part is simple in structure, low in manufacturing cost and convenient to assemble, and can effectively improve the assembling efficiency, so that the production beat can be effectively accelerated.

In some embodiments of the present application, the number of elastic portions is plural, and all elastic portions are disposed at intervals along the circumferential direction of the central axis of the pressure release passage. Through setting up a plurality of elasticity portions to can promote the joint strength of valve body and battery box, and then can improve the stability of pressure release device on the battery box.

In some embodiments of the present application, the body portion has a flange structure for abutting against an outer surface of the battery case. When the pressure relief device is assembled on the battery box body, the elastic part is propped against the inner surface of the battery box body, the flange structure is propped against the outer surface of the battery box body, the structure of the flange structure is simple, the propping strength of the main body part and the battery box body can be effectively improved, and then the installation stability of the pressure relief device on the battery box body is effectively improved.

In some embodiments of the present application, the pressure relief device further comprises a first seal, a portion of the body portion is configured to be disposed through the mounting hole of the battery case, and the first seal is configured to seal a gap between the body portion and the mounting hole.

When pressure relief device is used for the battery box, along the direction of the central axis of perpendicular to pressure relief passageway, utilize first sealing member to seal the mounting hole on main part and the battery box to sealed effect has been improved.

In some embodiments of the present application, the first seal is a first seal ring that is attached to the outer peripheral surface of the main body portion or for attachment to the inner peripheral wall of the mounting hole. The first sealing piece is arranged to be a sealing ring, so that the mounting hole of the battery box body can be circumferentially sealed, and the sealing effect is further improved.

In some embodiments of the present application, an annular groove is formed on the outer peripheral surface of the main body, and a part of the first sealing ring is embedded in the annular groove. The first sealing ring is arranged on the main body part, so that the sealing of the connecting position is realized simultaneously when the pressure relief device is assembled, and the assembling efficiency is further improved.

In some embodiments of the present application, the valve cartridge comprises:

the valve rod part is connected with the valve body and can move relative to the valve body along the direction of the central axis of the pressure relief channel;

and the valve cover part is connected with the valve rod part and is used for opening or closing the pressure relief channel.

The valve rod part moves relative to the valve body to drive the valve cover part to move, so that the valve cover part is switched between a state of opening the pressure relief channel and a state of closing the pressure relief channel, and the opening and closing actions of the pressure relief channel are effectively realized.

In some embodiments of the present application, the main body portion is provided with a connecting portion, the connecting portion is disposed in the pressure release channel, and the valve core further includes:

the sleeve part is connected with the connecting part, and one end of the valve rod part, which is away from the valve cover part, is spliced in the sleeve part;

the elastic part is arranged in the sleeve part, one end of the elastic part is matched with the valve rod part, the other end of the elastic part is matched with the sleeve part or the connecting part, and the rebound force of the elastic part drives the valve cover part to close the pressure relief channel through the valve rod part.

The valve core structure that valve rod portion, valve gap portion, sleeve portion and elasticity portion formed can make the pressure release passageway keep at normally closed state, and when pressure release device was used for the battery box, when the internal pressure of battery box was in the installation state, the valve gap portion closed the pressure release passageway, and when the internal environment of battery box was in unusual, the internal pressure of battery box increased, when pressure increase to can overcome the resilience force of elasticity portion, can push away valve gap portion, realizes the pressure release operation.

In some embodiments of the present application, a portion of the connecting portion is inserted into the sleeve portion and fixedly connected with the sleeve portion, and the body of the connecting portion inserted into the sleeve portion is matched with the elastic portion. The elastic part is accommodated by the sleeve, so that adverse influence of the external environment on the elastic part can be reduced, and further, the elastic part can fully exert performance.

In some embodiments of the present application, the elastic portion is a spring member, the spring member is sleeved on the valve rod portion, one end of the spring member is in clamping or abutting fit with the valve rod portion, and the other end of the spring member abuts against the connecting portion. The spring piece has a simple structure, and can effectively reduce the manufacturing cost of the pressure relief device.

In some embodiments of the present application, the connection between the connection portion and the sleeve portion is a threaded connection, an adhesive or a weld;

and/or the connection mode between the valve rod part and the valve cover part is threaded connection, bonding or welding.

The connection mode between the connecting part and the sleeve part is set, so that the connection mode between the connecting part and the sleeve part can be set according to the needs, and the convenience of connection between the connecting part and the sleeve part is improved. Likewise, the connection mode between the valve rod part and the valve cover part is set, so that the connection mode between the valve rod part and the valve cover part can be set according to the needs, and the convenience of connection of the valve rod part and the valve cover part is improved.

In some embodiments of the present application, the pressure relief device further includes a second seal disposed on the valve body or the valve core, the second seal being configured to seal a joint position of the valve body and the valve cover portion in an axial direction of the pressure relief passage. The second sealing piece is arranged, so that the sealing performance between the valve cover part and the valve body can be further improved, and the overall sealing performance of the pressure relief device is further improved.

In some embodiments of the present application, the second seal is a second seal ring that is attached to the valve cover portion. The second sealing piece is arranged to be a second sealing ring, so that circumferential sealing of the valve cover part is realized, and the sealing effect is further improved.

A second aspect of the present application proposes a battery box comprising:

a case body;

according to the pressure relief device, the clamping structure of the valve body is clamped and fixed on the mounting hole of the box body.

A third aspect of the present application proposes a battery comprising:

according to the battery case as above;

and the battery assembly is arranged in the battery box body.

A fourth aspect of the present application proposes a powered device comprising a battery according to the above.

The foregoing description is only an overview of the technical solutions of the present application, and may be implemented according to the content of the specification in order to make the technical means of the present application more clearly understood, and in order to make the above-mentioned and other objects, features and advantages of the present application more clearly understood, the following detailed description of the present application will be given.

Drawings

FIG. 1 schematically illustrates a schematic structural view of a vehicle according to one embodiment of the present application;

fig. 2 is a schematic view of the structure of the battery shown in fig. 1;

FIG. 3 is a partial schematic view of the structure shown in FIG. 2;

FIG. 4 is a cross-sectional view of A-A of the structure shown in FIG. 3;

FIG. 5 is an exploded view of the pressure relief device shown in FIG. 3;

Fig. 6 is a schematic view of the structure of the valve body of the pressure relief device shown in fig. 5.

The reference numerals are as follows:

1000. a vehicle;

100. a battery;

101. a battery assembly;

1011. a battery cell;

102. a battery case;

10. a pressure relief device;

1. a valve core;

11. a valve cover part; 111. a connection structure; 12. a valve stem portion; 121. a convex ring structure; 13. an elastic part; 14. a sleeve portion;

2. a valve body;

21. a main body portion; 211. a flange structure; 212. an annular groove; 22. an elastic part; 221. an elastic arm; 222. a limiting body; 23. a pressure relief channel; 24. a connection part;

3. a first seal;

4. a second seal;

20. a case body;

201. a first portion; 2011. an inner surface; 2012. an outer surface; 2013. a mounting hole; 202. a second portion;

200. a controller;

300. a motor;

a is the central axis of the pressure relief channel, and b is the direction perpendicular to the central axis of the pressure relief channel.

Detailed Description

Embodiments of the technical solutions of the present application will be described in detail below with reference to the accompanying drawings. The following examples are only for more clearly illustrating the technical solutions of the present application, and thus are only examples, and are not intended to limit the scope of protection of the present application.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having" and any variations thereof in the description and claims of the present application and in the description of the figures above are intended to cover non-exclusive inclusions.

In the description of the embodiments of the present application, the technical terms "first," "second," etc. are used merely to distinguish between different objects and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, a particular order or a primary or secondary relationship. In the description of the embodiments of the present application, the meaning of "plurality" is two or more unless explicitly defined otherwise.

Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment may be included in at least one embodiment of the present application. The appearances of such phrases in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. Those of skill in the art will explicitly and implicitly appreciate that the embodiments described herein may be combined with other embodiments.

In the description of the embodiments of the present application, the term "and/or" is merely an association relationship describing an association object, which means that three relationships may exist, for example, a and/or B may mean: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

In the description of the embodiments of the present application, the term "plurality" refers to two or more (including two), and similarly, "plural sets" refers to two or more (including two), and "plural sheets" refers to two or more (including two).

In the description of the embodiments of the present application, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the embodiments of the present application.

In the description of the embodiments of the present application, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured" and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; or may be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. The specific meaning of the above terms in the embodiments of the present application will be understood by those of ordinary skill in the art according to the specific circumstances.

Currently, the more widely the battery is used in view of the development of market situation. The battery is not only applied to energy storage power supply systems such as hydraulic power, firepower, wind power and solar power stations, but also widely applied to electric vehicles such as electric bicycles, electric motorcycles, electric automobiles, and the like, as well as a plurality of fields such as military equipment, aerospace, and the like. With the continuous expansion of the battery application field, the market demand thereof is also continuously expanding.

In this application, pressure relief device includes case and valve body, and the valve body is equipped with the pressure release passageway, and the case sets up on the valve body with movable mode to be used for opening or closing the pressure release passageway, the valve body is equipped with the joint structure, and the joint structure is used for cooperating with the mounting hole joint of battery box, in order to fix pressure relief device spacing on the battery box. When pressure relief device is used for the battery box, with valve body and battery box joint cooperation to realized the equipment of pressure relief device and battery box, compare in bolt installation pressure relief device, can reduce the use of bolt, make the cost obtain reducing effectively, the joint is fixed simultaneously and is compared in bolted connection fixedly, and the assembly is simple and assembly efficiency is high, thereby can effectively reduce pressure relief device's manufacturing cost.

The battery according to the embodiment of the application can be used in electric devices such as vehicles, ships or aircrafts, but is not limited to the use of the battery. A power supply system including a battery cell, a battery, and the like according to the present application, which constitute the power utilization device, may be used.

The electric equipment using the battery as the power supply in the embodiment of the application can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, a battery car, an electric automobile, a ship, a spacecraft and the like. Among them, the electric toy may include fixed or mobile electric toys, such as game machines, electric car toys, electric ship toys, electric plane toys, and the like, and the spacecraft may include planes, rockets, space planes, and spacecraft, and the like.

It should be understood that the technical solutions described in the embodiments of the present application are not limited to the above-described batteries and electric devices, but may be applied to all batteries including a case and electric devices using the batteries, but for simplicity of description, the following embodiments are described by taking an electric vehicle as an example.

Referring to fig. 1, fig. 1 is a schematic structural diagram of a vehicle 1000 according to some embodiments of the present application. The vehicle 1000 may be a fuel oil vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or a range-extended vehicle. The battery 100 is provided in the interior of the vehicle 1000, and the battery 100 may be provided at the bottom or the head or the tail of the vehicle 1000. The battery 100 may be used for power supply of the vehicle 1000, for example, the battery 100 may be used as an operating power source of the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, the controller 200 being configured to control the battery 100 to power the motor 300, for example, for operating power requirements during start-up, navigation, and travel of the vehicle 1000.

In some embodiments of the present application, battery 100 may not only serve as an operating power source for vehicle 1000, but may also serve as a driving power source for vehicle 1000, instead of or in part instead of fuel oil or natural gas, to provide driving power for vehicle 1000.

Fig. 2 shows a schematic structural diagram of a battery 100 according to an embodiment of the present application. In fig. 2, the battery 100 may include a plurality of battery packs 101 and a battery case 102, and the plurality of battery packs 101 are accommodated inside the battery case 102. The battery case 102 is used to house the battery assembly 101 to reduce the effect of liquids or other foreign matter on the charging or discharging of the battery cells. The battery case 102 may have a simple three-dimensional structure such as a rectangular parallelepiped, a cylinder, or a sphere, or may have a complex three-dimensional structure formed by combining simple three-dimensional structures such as a rectangular parallelepiped, a cylinder, or a sphere. The battery case 102 may be made of an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

To meet different power requirements for use, the battery assembly 101 may include a plurality of battery cells 1011, with the battery cells 1011 referring to the smallest units that make up the battery assembly. A plurality of battery cells 1011 may be connected in series and/or parallel via electrode terminals for use in various applications. The battery cell 1011 may include, but is not limited to, a lithium ion battery, a sodium ion battery, a magnesium ion battery, or the like. In addition, the shape of the battery cell includes, but is not limited to, a cylindrical shape, a flat shape, a rectangular parallelepiped shape, or other shapes, etc.

In some embodiments, as shown in fig. 2, the battery case 102 may include a case body 20 and a pressure relief device 10, wherein the case body 20 includes a first portion 201 and a second portion 202, the first portion 201 and the second portion 202 are mutually covered, and the first portion 201 and the second portion 202 together define a space for accommodating the battery assembly 101. The second portion 202 may be a hollow structure having one end opened, the first portion 201 may be a plate-shaped structure, and the first portion 201 covers the opening side of the second portion 202, so that the first portion 201 and the second portion 202 together define a space for accommodating the battery assembly 101; the first portion 201 and the second portion 202 may also be hollow structures with one side open, and the open side of the first portion 201 is engaged with the open side of the second portion 202.

As shown in fig. 2 to 4, a mounting hole 2013 is provided in the first portion 201 of the tank body 20, and the pressure relief device 10 is fixedly connected to the mounting hole 2013. The pressure relief device 10 is a member that relieves the pressure inside the case body 20 of the battery 100. When the pressure or temperature inside the tank body 20 reaches a threshold value, the pressure inside the tank body 20 is released by the pressure release device 10.

In some embodiments of the present application, as shown in fig. 2 to 6, a pressure relief device 10 is provided, where the pressure relief device 10 includes a valve core 1 and a valve body 2, the valve body 2 is provided with a pressure relief channel 23, the valve core 1 is movably disposed on the valve body 2 and is used for opening or closing the pressure relief channel 23, and at least part of the valve body 2 is used for being in clamping fit with a battery case 102 so as to fix the pressure relief device 10 on the battery case 102.

At least part of the valve body 2 is in clamping fit with the battery box 102, namely, when the pressure relief device 10 is used for the battery box 102, the pressure relief device 10 is assembled, and at least part of the body of the valve body 2 of the pressure relief device 10 is fixedly connected to the battery box 102 in a clamping manner, so that the pressure relief device 10 is fixedly mounted on the battery box 102.

In addition, when the pressure relief device 10 is mounted on the battery case 102, the valve element 1 is movable relative to the valve body 2, and when the internal pressure of the battery case 102 is normal, the valve element 1 keeps the pressure relief passage 23 in a closed state, and when the internal pressure of the battery case 102 is increased and the opening pressure of the valve element 1 is reached, the valve element 1 moves relative to the valve body 2, so that the pressure relief passage 23 is opened to thereby effect relief of the pressure.

The clamping manner includes but is not limited to a snap connection, an interference fit, an elastic snap connection, and the like.

When pressure relief device 10 is used for battery box 102, with valve body 2 and battery box 102 joint cooperation to realized pressure relief device 10 and battery box 102's equipment, compare in bolt installation pressure relief device 10, can reduce the use of bolt, make the cost obtain reducing effectively, the joint is fixed simultaneously compare in bolted connection, and the assembly is simple and assembly efficiency is high, thereby can effectively reduce pressure relief device 10's manufacturing cost.

In some embodiments of the present application, the valve body 2 includes a main body portion 21 and an elastic portion 22, the pressure release channel 23 is opened on the main body portion 21, the clamping structure includes a portion of the main body portion 21 for abutting on an outer surface 2012 of the battery case 102, one end of the elastic portion 22 is connected to the main body portion 21, and the clamping structure further includes the other end of the elastic portion 22 for abutting on an inner surface 2011 of the battery case 102.

The elastic portion 22 refers to a structure having elastic properties, in which the elastic portion 22 is capable of being elastically deformed by an external force, and at the same time, the elastic portion 22 is restored to the elastic deformation by the removal of the external force. The connection of the elastic portion 22 and the main body portion 21 means that the elastic portion 22 is fixedly connected to the main body portion 21 and is not movable relative to each other.

The inner surface 2011 of the battery case 102 is a surface of the battery case 102 facing the accommodation space, while the outer surface 2012 of the battery case 102 is a surface of the battery case 102 facing the outside.

Specifically, when the pressure relief device 10 is used in the battery box 102, the elastic portion 22 cannot pass through the mounting hole 2013 on the battery box 102 under the action of no external force, and when the pressure relief device 10 is assembled, the external force is applied to the elastic portion 22, so that the elastic portion 22 is elastically deformed, the elastically deformed elastic portion 22 passes through the mounting hole 2013 of the battery box 102, the main body 21 abuts against the outer surface 2012 of the battery box 102, the external force is relieved, the elastic portion 22 after the external force is relieved resumes the elastic deformation, and the portion of the elastic portion 22 passing through the mounting hole 2013 abuts against the inner surface 2011 of the box, thereby realizing that the valve body 2 is respectively clamped on two opposite sides of the battery box 102.

The elastic part 22 and the main body part 21 are respectively abutted against the two opposite sides of the battery box 102, so that the valve body 2 and the battery box 102 are clamped and fixed, and the pressure relief device 10 is mounted. The valve body 2 has a simple structure and low manufacturing cost, and in addition, the assembly is convenient and the accessories used during the assembly are reduced, thereby reducing the assembly cost.

In some embodiments of the present application, as shown in fig. 3 to 5, the elastic portion 22 includes an elastic arm 221 and a limiting body 222, one end of the elastic arm 221 is one end of the elastic portion 22, along a direction perpendicular to a central axis of the pressure release channel 23 (as shown in fig. 4, a is a central axis of the pressure release channel 23, b is a direction perpendicular to the central axis of the pressure release channel 23 in fig. 4), the elastic arm 221 is configured to be elastically deformable, one end of the limiting body 222 is connected to the other end of the elastic arm 221, and the limiting body 222 extends in a direction away from the central axis, along an extending direction of the elastic arm 221, the limiting body 222 is disposed at a distance from one end of the elastic arm 221, and the other end of the limiting body 222 is the other end of the elastic portion 22.

When the pressure relief device 10 is used for the battery box 102 and the pressure relief device 10 is installed, under the driving of an external force, the elastic arm 221 elastically deforms in a direction close to the central axis of the pressure relief channel 23, at this time, the limiting body 222 can pass through the installation hole 2013 of the box, when the partial structure of the main body 21 abuts against the outer surface 2012 of the battery box 102, the external force is relieved, the elastic arm 221 recovers the elastic deformation, and at this time, the limiting body 222 abuts against the inner surface 2011 of the battery box 102.

It should be understood that, under the condition of no stress, the distance from the limiting body 222 to the central axis of the pressure relief channel 23 is greater than the radius of the mounting hole 2013, the limiting body 222 cannot pass through the mounting hole 2013 on the battery box 102, when the elastic arm 221 is subjected to the external force and moves towards the direction close to the central axis of the pressure relief channel 23, the elastic arm 221 is elastically deformed and drives the limiting body 222 to move towards the direction close to the central axis of the pressure relief channel 23, when the distance from the limiting body 222 to the central axis of the pressure relief channel 23 is smaller than the radius of the mounting hole 2013, the limiting body 222 can pass through the mounting hole 2013 of the battery box 102, when the limiting body 222 passes through the mounting hole 2013, the external force is relieved, the elastic portion 22 recovers the elastic deformation and drives the limiting body 222 to move towards the direction away from the central axis of the pressure relief channel 23, so that the distance from the limiting body 222 to the central axis of the pressure relief channel 23 is greater than the radius of the mounting hole 2013, and the inner surface 2011 of the battery box 102 is hooked to fix the valve body 2.

The elastic part 22 has the advantages of simple structure, low manufacturing cost and convenient assembly, and can effectively improve the assembly efficiency, so that the production beat can be effectively accelerated.

It should be noted that, after the pressure relief device 10 is installed on the battery box 102, a part of the main body 21 is inserted into the installation hole 2013 of the battery box 102, the circumferential side wall of the installation hole 2013 limits the main body 21 in the radial direction of the installation hole 2013, another part of the main body 21 is located outside the battery box 102 and abuts against the outer surface 2012 of the battery box 102, and a part of the body of the elastic part 22 abuts against the inner surface 2011 of the battery box 102, so that the limit of the valve body 2 in the axial direction of the installation hole 2013 is realized, and the installation and fixation of the pressure relief device 10 are further realized.

In addition, the elastic arm 221 and the limiting body 222 may be in an integral structure, and may be connected and fixed in a split structure. In this application, be integrated into one piece structure between elastic arm 221 and the spacing body 222 to can improve the convenience of processing, make the efficiency of processing obtain promoting effectively.

The elastic portion 22 may be a metal member or a non-metal member, and may be manufactured by injection molding or hot pressing when the elastic portion 22 is a non-metal member and integrally formed, for example, a plastic member, or may be manufactured by punching when the elastic portion 22 is a metal member and integrally formed, for example, an elastic steel sheet.

In some embodiments of the present application, as shown in fig. 3 to 6, the number of elastic portions 22 is plural, and all elastic portions 22 are arranged at intervals along the circumferential direction of the central axis of the pressure release passage 23.

Specifically, by providing the plurality of elastic portions 22, the connection strength between the valve body 2 and the battery case 102 can be improved, and the stability of the pressure relief device 10 on the battery case 102 can be improved.

It should be noted that, along the circumferential direction of the central axis of the pressure release passage 23, all the elastic portions 22 may be disposed at equal intervals or may be disposed at unequal intervals.

In some embodiments of the present application, as shown in fig. 4-6, the body portion 21 has a flange structure 211, the flange structure 211 being for abutment against the outer surface 2012 of the battery case 102.

Specifically, the flange structure 211 is provided along the axial direction of the main body portion 21 and covers a circumference of the main body portion 21, and the flange structure 211 is provided coaxially with the relief passage 23. When the pressure relief device 10 is assembled to the battery case 102, the elastic portion 22 abuts against the inner surface 2011 of the battery case 102, the flange structure 211 abuts against the outer surface 2012 of the battery case 102, and the valve body 2 is fixed to the battery case 102 by the flange structure 211 and the elastic portion 22 abutting against opposite surfaces of the battery case 102, respectively, so that the pressure relief device 10 is mounted.

The flange structure 211 has a simple structure, and can effectively improve the abutting strength of the main body 21 and the battery box 102, thereby effectively improving the installation stability of the pressure relief device 10 on the battery box 102.

It should be noted that the main body 21 may be a metal member or a non-metal member. The flange structure 211 may be integrally formed with the main body 21, or may be provided on the main body 21 by welding, bonding, or the like. In the present application, the main body 21 is a non-metal member, and the flange structure 211 is integrally formed with the main body 21, for example, the main body 21 is a plastic member, and is manufactured by injection molding.

In addition, the mounting hole 2013 on the battery box 102 is a round hole, the main body part 21 is of a cylindrical structure, and the flange structure 211 surrounds a protruding structure formed by the cylindrical structure, wherein the radius of the protruding structure is larger than that of the mounting hole 2013, so that the protruding structure cannot penetrate through the mounting hole 2013, and further limiting of the valve body 2 can be achieved by using the protruding structure.

In some embodiments of the present application, as shown in fig. 4 and 5, the pressure relief device 10 further includes a first seal member 3, a portion of the main body portion 21 is configured to be disposed in the mounting hole 2013 of the battery case 102, and the first seal member 3 is configured to seal a gap between the main body portion 21 and the mounting hole 2013.

Specifically, when the pressure relief device 10 is used for the battery case 102, the main body portion 21 is sealed with the mounting hole 2013 on the battery case 102 with the first seal 3 in the direction perpendicular to the central axis of the pressure relief passage 23, thereby improving the sealing effect.

It should be noted that, the first sealing member 3 is a flexible structure, and when the valve body 2 is mounted in place on the battery case 102, the first sealing member 3 is elastically deformed, and the gap between the main body portion 21 of the valve body 2 and the mounting hole 2013 is sealed by the elastic deformation, so that the sealing performance of the connection position of the valve body 2 and the mounting hole 2013 is improved.

In addition, the first seal member 3 may be a rubber member, a silicone member, or the like.

In some embodiments of the present application, the first seal member 3 is a first seal ring, and the first seal ring is attached to the outer peripheral surface of the main body portion 21. The first sealing member 3 is provided as a sealing ring and is sleeved on the main body part 21, when the main body part 21 is in plug-in fit with the mounting hole 2013 of the battery box 102, the first sealing member 3 enters into the mounting hole 2013 along with the main body part 21, and the first sealing member 3 seals a gap between the mounting hole 2013 and the main body part 21. In addition, the first sealing member 3 is arranged as a sealing ring, so that the mounting hole 2013 of the battery box 102 can be circumferentially sealed, and the sealing effect is further improved.

In some embodiments of the present application, the first seal 3 is a first seal ring for attachment to the inner peripheral wall of the mounting hole 2013. The first seal 3 is provided as a seal ring, and is fixedly connected to the inner peripheral wall of the mounting hole 2013, and when the main body 21 and the mounting hole 2013 of the battery case 102 are inserted in place, the first seal 3 seals the gap between the mounting hole 2013 and the main body 21. In addition, the first sealing member 3 is arranged as a sealing ring, so that the mounting hole 2013 of the battery box 102 can be circumferentially sealed, and the sealing effect is further improved.

In some embodiments of the present application, as shown in fig. 5, an annular groove 212 is formed on the outer peripheral surface of the main body 21, and a part of the first seal ring is embedded in the annular groove 212.

Specifically, the first seal ring is disposed on the main body 21, so that the pressure relief device 10 can be assembled while sealing the connection position, and the assembly efficiency can be further improved.

It should be understood that the first sealing ring is sleeved on the main body 21, and part of the first sealing ring is embedded in the annular groove 212 of the main body 21, and the other part of the first sealing ring protrudes out of the outer peripheral surface of the main body 21. When the main body 21 is inserted into place in the mounting hole 2013 of the battery case 102, the first seal ring is elastically deformed and sandwiched between the annular groove 212 and the inner peripheral wall of the mounting hole 2013, thereby sealing the joint position of the main body 21 and the mounting hole 2013.

In some embodiments of the present application, as shown in fig. 4 and 5, the valve cartridge 1 includes a valve stem portion 12 and a valve cap portion 11, the valve stem portion 12 is connected to the valve body 2, and the valve stem is movable relative to the valve body 2 in a direction of a central axis of the relief passage 23, and the valve cap portion 11 is connected to the valve stem portion 12 and is used to open or close the relief passage 23.

Specifically, the valve rod portion 12 is disposed in the pressure release channel 23 of the main body portion 21 and can move relative to the valve body 2, one end of the valve rod portion 12 is connected with the valve cover portion 11, and the valve cover portion 11 is driven to move by the movement of the valve rod portion 12 relative to the valve body 2, so that the valve cover portion 11 is switched between a state of opening the pressure release channel 23 and a state of closing the pressure release channel 23, and opening and closing actions of the pressure release channel 23 are effectively realized.

In some embodiments of the present application, as shown in fig. 4 and 5, a connecting portion 24 is provided on a main body portion 21, the connecting portion 24 is disposed in a pressure relief channel 23, the valve core 1 further includes a sleeve portion 14 and an elastic portion 13, the sleeve portion 14 is connected with the connecting portion 24, one end of the valve stem 12, which is away from the valve cap portion 11, is inserted into the sleeve portion 14, the elastic portion 13 is disposed in the sleeve portion 14, one end of the elastic portion 13 is matched with the valve stem 12, the other end of the elastic portion 13 is matched with the sleeve portion 14 or the connecting portion 24, and the elastic force of the elastic portion 13 drives the valve cap portion 11 to close the pressure relief channel 23 through the valve stem portion 12.

The valve core 1 structure formed by the valve rod part 12, the valve cover part 11, the sleeve part 14 and the elastic part 13 can enable the pressure relief channel 23 to be kept in a normally closed state, when the pressure relief device 10 is used for the battery box 102, the valve cover part 11 closes the pressure relief channel 23 when the internal pressure of the battery box 102 is in an installation state, when the internal environment of the battery box 102 is abnormal, the internal pressure of the battery box 102 is increased, and when the pressure is increased to overcome the resilience force of the elastic part 13, the valve cover part 11 can be pushed open to realize pressure relief operation.

In some embodiments of the present application, as shown in fig. 4, a part of the connection portion 24 is inserted into the sleeve portion 14 and fixedly connected with the sleeve portion 14, and the body of the connection portion 24 inserted into the sleeve portion 14 is matched with the elastic portion 13.

Specifically, the elastic portion 13 is accommodated by the sleeve, and thus, the adverse effect of the external environment on the elastic portion 13 can be reduced, and further, the elastic portion 13 can sufficiently exhibit performance.

It should be noted that, the connecting portion 24 is a hollow bracket disposed on an inner peripheral wall of the pressure release channel 23, a flanging hole is disposed in a middle position of the hollow bracket, the flanging hole is a connecting end of the connecting portion 24, a flanging of the flanging hole is inserted into the sleeve portion 14 and is fixedly connected with the sleeve portion 14, one end of the valve rod portion 12 is disposed in the sleeve portion 14, the other end of the valve rod portion 12 passes through the flanging hole and is fixedly connected with the valve cover portion 11, the connecting portion 24 and the sleeve form a containing space, the elastic portion 13 is disposed in the containing space, and the elastic portion 13 is matched with the valve rod portion 12 to drive the valve rod portion 12, thereby driving the valve cover portion 11.

In some embodiments of the present application, as shown in fig. 4 and 5, the elastic portion 13 is a spring member, which is sleeved on the valve stem 12, one end of the spring member is in abutting engagement with the valve stem 12, and the other end of the spring member abuts against the connecting portion 24.

Specifically, the valve rod 12 has a convex ring structure 121 at one end thereof located in the sleeve portion 14, the spring is sleeved on the valve rod, the spring is in a compressed state, one end of the spring abuts against the convex ring structure 121, and the other end of the spring abuts against the structure of the connecting portion 24 located in the sleeve. The spring member has a simple structure, and can effectively reduce the manufacturing cost of the pressure relief device 10.

It should be noted that in other embodiments of the present application, the elastic portion may be an elastic cord, one end of which is connected to the sleeve portion, and the other end of which is connected to the valve stem portion.

In some embodiments of the present application, the elastic portion 13 is a spring member, which is sleeved on the valve rod portion 12, one end of the spring member is clamped with the valve rod portion 12, and the other end of the spring member abuts against the connecting portion 24. Specifically, the valve rod 12 has a hole at one end thereof located in the sleeve portion 14, the spring is sleeved on the valve rod, the spring is in a compressed state, one end of the spring is inserted into the hole, and the other end of the spring abuts against the structure of the connecting portion 24 located in the sleeve. The spring member has a simple structure, and can effectively reduce the manufacturing cost of the pressure relief device 10.

In some embodiments of the present application, the connection between the connection portion 24 and the sleeve portion 14 is by threaded connection, adhesive bonding or welding. The connection mode between the connecting portion 24 and the sleeve portion 14 is set, so that the connection mode between the connecting portion 24 and the sleeve portion 14 can be set according to needs, and the convenience of connection of the connecting portion 24 and the sleeve portion 14 is improved.

It should be noted that, in the present application, the connection manner between the connection portion 24 and the sleeve is a threaded connection, and the threaded connection is assembled conveniently, and meanwhile, replacement or maintenance of the internal components can be achieved by releasing the threaded connection.

In some embodiments of the present application, the connection between the valve stem 12 and the bonnet 11 is a threaded connection, an adhesive or a weld. The connection mode between the valve rod 12 and the valve cover 11 is set, so that the connection mode between the valve rod 12 and the valve cover 11 can be set according to the requirement, and the convenience of connection of the valve rod 12 and the valve cover 11 is improved.

It should be noted that, in the present application, the valve cap 11 is provided with the connection structure 111, the connection manner between the valve rod 12 and the connection structure 111 of the valve cap 11 is a threaded connection, the threaded connection is convenient to assemble, and meanwhile, the replacement or maintenance of the components can be realized by releasing the threaded connection.

In some embodiments of the present application, as shown in fig. 4 and 5, the pressure relief device 10 further includes a second seal member 4, where the second seal member 4 is disposed on the valve body 2 or the valve core 1, and the second seal member 4 is used to seal the joint position of the valve body 2 and the valve cover portion 11 along the axial direction of the pressure relief channel 23.

Specifically, the provision of the second seal 4 can further improve the sealability between the valve cover portion 11 and the valve body 2, and thus the overall sealability of the pressure relief device 10.

It should be noted that the second sealing member 4 may be a rubber member or a silicone member or the like.

In some embodiments of the present application, the second seal 4 is a second seal ring that is attached to the valve cover portion 11. Specifically, the second seal member 4 is provided as a second seal ring, thereby realizing circumferential sealing of the valve cover portion 11, further improving the sealing effect.

As shown in fig. 2, a second aspect of the present application proposes a battery case 102, the battery case 102 including a case body 20 and a clamping structure of a valve body 2 according to the pressure relief device 10 as described above is clamped and fixed on a mounting hole of the case body 20.

The battery box 102 has the pressure relief device 10 as described above, and the pressure relief device 10 has the same beneficial effects as the pressure relief device 10 as described above, and will not be described herein.

As shown in fig. 1, a third aspect of the present application proposes a battery 100, the battery 100 including a battery case 102 according to the above and a battery assembly 101, the battery assembly 101 being disposed within the battery case 102.

The battery case 102 of the battery 100 has the pressure relief device 10 described above, and the pressure relief device 10 has the same beneficial effects as the pressure relief device 10 described above, and the description thereof is omitted herein.

A fourth aspect of the present application proposes a powered device comprising a battery 100 according to the above.

The battery box 102 of the electric device is provided with the pressure relief device 10 as described above, and the pressure relief device 10 has the same beneficial effects as the pressure relief device 10 as described above, so that the description is omitted herein.

In the embodiment of the present application, as shown in fig. 2 to 6, the present application proposes a pressure relief device 10 including a valve element 1, a valve body 2, a first sealing ring and a second sealing ring, the valve body 2 being provided with a pressure relief channel 23, the valve element 1 being movably disposed on the valve body 2.

Further, the valve body 2 includes a main body 21 and a plurality of elastic parts 22, the pressure release channel 23 is opened in the main body 21, a plurality of elastic parts 22 are equidistant along the circumference of the pressure release channel 23, be equipped with flange structure 211 on the main body 21, flange structure 211 is used for leaning on the surface 2012 of battery box 102, elastic part 22 includes elastic arm 221 and spacing body 222, the one end of elastic arm 221 is connected in the main body 21, along the direction of the central axis of perpendicular to pressure release channel 23, elastic arm 221 sets up to elastically deformable, spacing body 222 is connected on elastic arm 221, and spacing body 222 extends to the direction of deviating from the central axis, along the extending direction of elastic arm 221, spacing body 222 is spaced with the one end of elastic arm 221, spacing body 222.

Further, an annular groove 212 is formed in the outer peripheral surface of the main body 21, a part of the first sealing ring is embedded in the annular groove 212, and the first sealing member 3 is used for sealing a gap between the main body 21 and the mounting hole 2013 of the battery case 102.

Further, the main body 21 is provided with a connecting portion 24, the connecting portion 24 is arranged in the pressure relief channel 23, the valve core 1 comprises a valve rod 12, a valve cover 11, a sleeve portion 14 and a spring member, the sleeve portion 14 is in threaded connection with the connecting portion 24, one end of the valve rod 12 penetrates through the connecting portion 24 to be in threaded connection with the valve cover 11, one end of the valve rod 12, which is away from the valve cover 11, is inserted into the sleeve portion 14, the spring member is sleeved on the body of the valve rod 12, the valve rod 12 is located on the body of the sleeve portion 14, one end of the spring member abuts against a convex ring structure 121 of the valve rod, the other end of the spring member abuts against the connecting portion 24, the spring member is compressed, and the rebound force of the spring member drives the valve cover to close the pressure relief channel 23 through the valve rod 12.

Further, a second seal ring is provided on the valve cover portion 11, and the second seal member 4 is provided to seal the joint position of the valve body 2 and the valve cover portion 11 in the axial direction of the relief passage 23.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some or all of the technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit of the embodiments, and are intended to be included within the scope of the claims and description. In particular, the technical features mentioned in the respective embodiments may be combined in any manner as long as there is no structural conflict. The present application is not limited to the specific embodiments disclosed herein, but encompasses all technical solutions falling within the scope of the claims.

Claims

1. A pressure relief device, the pressure relief device comprising:

a valve core;

the valve body, the valve body is equipped with the pressure release passageway, the case is in with movable mode sets up on the valve body, and be used for opening or closing the pressure release passageway, the valve body is equipped with the joint structure, the joint structure is used for cooperating with the mounting hole joint of battery box, in order to with pressure release device spacing fix on the battery box.

2. The pressure relief device according to claim 1, wherein said valve body comprises:

the pressure release channel is formed in the main body, and the clamping structure comprises a part of the main body which is used for being abutted against the outer surface of the battery box body;

and one end of the elastic part is connected with the main body part, and the clamping structure further comprises the other end of the elastic part, which is used for abutting against the inner surface of the battery box body.

3. The pressure relief device according to claim 2, wherein said resilient portion comprises:

the elastic arm is provided with one end which is one end of the elastic part and can elastically deform along the direction perpendicular to the central axis of the pressure relief channel;

The limiting body, the one end of limiting body is connected on the other end of elastic arm, and the limiting body is to deviating from the direction of central axis extends, follows the extending direction of elastic arm, the limiting body with the one end interval setting of elastic arm, the other end of limiting body is the other end of elastic part.

4. The pressure relief device according to claim 2 or 3, wherein the number of said elastic portions is plural, and all of said elastic portions are disposed at intervals along a circumferential direction of a central axis of said pressure relief passage.

5. A pressure relief device as claimed in claim 2 or claim 3, wherein the body portion has a flange formation for abutment against the outer surface of the battery housing.

6. The pressure relief device according to claim 2 or 3, further comprising a first seal, a portion of said body portion being configured to be disposed through a mounting hole in said battery compartment, said first seal being configured to seal a gap between said body portion and said mounting hole.

7. The pressure relief device according to claim 6, wherein said first seal member is a first seal ring attached to an outer peripheral surface of said main body portion or for attachment to an inner peripheral wall of said mounting hole.

8. The pressure relief device according to claim 7, wherein an annular groove is formed in an outer peripheral surface of said main body portion, and a portion of said first seal ring is embedded in said annular groove.

9. The pressure relief device according to claim 2 or 3, wherein said valve cartridge comprises:

a valve rod part connected with the valve body and capable of moving relative to the valve body along the direction of the central axis of the pressure relief channel;

and the valve cover part is connected with the valve rod part and used for opening or closing the pressure relief channel.

10. The pressure relief device according to claim 9, wherein said body portion is provided with a connecting portion disposed within said pressure relief passage, said valve cartridge further comprising:

11. The pressure relief device according to claim 10, wherein a portion of said connecting portion is inserted into said sleeve portion and fixedly connected thereto, and wherein a body of said connecting portion inserted into said sleeve portion is engaged with said resilient portion.

12. The pressure relief device according to claim 11, wherein said spring portion is a spring member, said spring member is sleeved on said valve stem portion, one end of said spring member is engaged with or abutted against said valve stem portion, and the other end of said spring member abuts against said connecting portion.

13. The pressure relief device according to claim 10, wherein the connection between said connection portion and said sleeve portion is threaded, glued or welded;

14. The pressure relief device according to claim 9, further comprising a second seal disposed on said valve body or said valve spool for sealing a junction of said valve body and said valve cover.

15. The pressure relief device according to claim 14, wherein said second seal is a second seal ring, said second seal ring being attached to said valve cover portion.

16. A battery box, characterized in that the battery box comprises:

a case body;

the pressure relief device according to any one of claims 1 to 15, wherein said snap-fit structure of said valve body is snap-fitted over a mounting hole of said tank body.

17. A battery, the battery comprising:

the battery case according to claim 16;

and the battery assembly is arranged in the battery box body.

18. A powered device comprising the battery of claim 17.