CN219071908U - Battery fire prevention device, battery box, battery and electric equipment - Google Patents

Abstract

The application provides a battery fire prevention device, battery box, battery and consumer. The battery fire protection device includes: a housing having a receiving chamber, the housing being for mounting on an outside of an explosion-proof valve of a battery; the refrigerant is arranged in the accommodating cavity and can be controlled to generate cold energy so as to cool down and cool down the eruption sprayed out of the explosion-proof valve. The housing cavity of the housing is provided with the refrigerant, and the housing is arranged on the outer side of the explosion-proof valve when the battery is in use, so that when the battery is out of control, the refrigerant can generate cold energy to actively cool the eruption sprayed out of the explosion-proof valve, so that the combustion speed of the eruption sprayed out is smaller than the jet flow speed, and the flame burnt by the eruption can not be stably maintained, thereby achieving the effects of extinguishing fire and preventing fire.

Description

Battery fire protection device, battery box, battery and electrical equipment

technical field

The present application belongs to the technical field of batteries, and more specifically relates to a battery fire protection device, a battery box, a battery and electrical equipment.

Background technique

After the battery is thermally runaway, it will produce a mixture containing a large amount of flammable gas, which will increase the pressure in the battery. When a certain pressure is reached, the explosion-proof valve will be opened to spray out. In addition, due to the high surface temperature of the battery during the eruption process, if the eruption from the explosion-proof valve contacts with the oxygen in the external environment, it is easy to generate an open flame, which will generate continuous heat and burn around the battery pack, which is more harmful. Therefore, it is necessary to Fireproof the battery. However, the fire prevention devices currently applied to batteries have poor fire performance.

Utility model content

The purpose of the embodiment of the present application is to provide a battery fire protection device, a battery box, a battery and electrical equipment, so as to solve the problem of poor fire protection performance of the fire protection device applied to the battery in the related art.

In the first aspect, the embodiment of the present application provides a battery fire prevention device, including:

The casing has an accommodation cavity, and the casing is used to be installed on the casing of the battery on the outside of the explosion-proof valve;

The refrigerant, which is arranged in the accommodating cavity, can generate cold under control to cool down the eruption ejected from the explosion-proof valve, so that the combustion velocity of the eruption is lower than the jet velocity.

In the technical solution of the embodiment of the present application, by setting the refrigerant in the housing cavity and installing the housing outside the explosion-proof valve during use, the refrigerant can generate cold energy when the battery is out of control to actively Cool the eruption from the explosion-proof valve, so that the burning speed of the eruption is lower than the jet velocity, so that the flame of the eruption cannot be maintained stably, so as to achieve the effect of fire extinguishing and fire prevention.

In some embodiments, the battery fire protection device further includes a heat exchange tube, the heat exchange tube is arranged around the explosion-proof valve, and the casing is arranged outside the heat exchange tube.

By setting the heat exchange tube, when in use, when the explosion-proof valve ejects the eruption, the cooling capacity generated by the refrigerant in the casing cools the heat exchange tube, and the eruption is cooled through the heat exchange tube to increase the cooling capacity. Utilization rate, which can reduce the use of refrigerant, so as to save energy, and can use a smaller casing and a smaller amount of refrigerant, thereby reducing the size of the battery fire protection device, so as to reduce the use of the battery fire protection The volume of the battery of the device.

In some embodiments, the inner surface and/or the outer surface of the heat exchange tube is provided with heat conducting protrusions.

Heat transfer protrusions are set on the heat exchange tubes to increase the heat exchange area, thereby improving the utilization rate of cooling capacity and saving energy.

In some embodiments, the thermally conductive bumps include bumps and/or ridges.

The heat conduction protrusion is formed by using bumps and/or embossed lines, which has a simple structure and is convenient for design and manufacture.

In some embodiments, the heat exchange tube is straight, or the heat exchange tube is bent.

The heat exchange tube adopts a straight tube, which is simple in structure, convenient in processing and production, and small in size.

The heat exchange tube is bent to increase the heat exchange area and improve the utilization rate of cooling capacity.

In some embodiments, the casing is disposed around the heat exchange tubes.

By making the casing surround the heat exchange tubes, the cooling generated by the refrigerant in the casing can be more evenly transmitted to the heat exchange tubes, ensuring the effective use of the heat exchange area of the heat exchange tubes and improving the utilization efficiency of cooling capacity.

In some embodiments, a communication channel is provided between the casing and the heat exchange tube.

Setting the shell and the heat exchange tube at intervals can facilitate the assembly between the shell and the heat exchange tube, and when the refrigerant is sprayed out, it is easy to flow out from the circulation channel so that the refrigerant can be sprayed out to cool down the heat exchange tube.

In some embodiments, the outer surface of the heat exchange tube is provided with a plurality of heat conduction protrusions at intervals, and the end of the heat conduction protrusion away from the heat exchange tube is connected to the casing.

Connecting the heat conduction protrusions on the outer surface of the heat exchange tubes to the casing can ensure a more stable relative position between the heat exchange tubes and the case, and a circulation channel can be formed between two adjacent heat conduction protrusions, which can also increase the heat exchange rate. thermal area.

In some embodiments, a diversion channel is provided in the casing for the spray ejected by the explosion-proof valve to pass through, and the projection of the explosion-proof valve along the axial direction of the diversion channel is located in the diversion channel.

A diversion channel is set in the casing, and the projection of the explosion-proof valve along the axial direction of the diversion channel is in the diversion channel, so that the spray from the explosion-proof valve can flow through the diversion channel, so that the refrigerant in the casing can generate The high cooling capacity cools the eruption, improving the cooling speed and cooling capacity utilization rate.

In some embodiments, the guide channel is arranged in a straight line, or the guide channel is arranged in a curved manner.

The guide channel is arranged in a straight line section, has a simple structure, is convenient to process and manufacture, and is small in size.

The curved setting of the diversion channel can increase the heat exchange area and improve the utilization rate of cooling capacity.

In some embodiments, the refrigerant is a high-pressure incombustible gas stored in the accommodating cavity, and the casing is provided with a nozzle that can be opened in a controlled manner.

The high-pressure non-combustible gas is ejected through the nozzle, the pressure of the high-pressure non-combustible gas decreases, the volume expands, and heat is absorbed, thereby generating cold energy to cool the eruption ejected from the explosion-proof valve. In addition, the use of non-combustible gas can also Play a role in fire extinguishing.

In some embodiments, the nozzle is provided with a pressure valve that can be pushed open by the pressure of the spray from the explosion-proof valve.

A pressure valve is set at the spout. When the explosion-proof valve ejects the eruption, the pressure of the eruption is relatively high, so that the pressure valve can be pushed open, so that the refrigerant in the casing is ejected from the spout, so as to prevent the explosion of the explosion-proof valve. The object is cooled down.

In some embodiments, the nozzle is provided with a temperature control valve capable of sensing the temperature of the spray ejected from the explosion-proof valve to control opening.

A temperature control valve is installed at the nozzle. When the explosion-proof valve ejects eruptions, due to the high temperature of the eruptions, the temperature control valve is opened under the action of this temperature, so that the refrigerant in the casing is ejected from the nozzle, so as to The eruption ejected from the explosion-proof valve is cooled down.

In some embodiments, the spout is provided with a control valve controlled and switched by the battery management system.

A control valve is set at the nozzle, and when the explosion-proof valve ejects the eruption, it is controlled by the battery management system, so that the control valve is opened, and the refrigerant in the casing is ejected from the nozzle, so as to control the eruption ejected from the explosion-proof valve Cool down.

In the second aspect, the embodiment of the present application provides a battery box, including a box body, an explosion-proof valve and the battery fire protection device described in any of the above embodiments, the explosion-proof valve is installed on the box body, and the battery fire protection device is installed on the box body , The casing is installed on the outside of the explosion-proof valve.

In a third aspect, the embodiment of the present application provides a battery, including the battery box as described in the above embodiment and the battery cells arranged in the battery box.

In a fourth aspect, the embodiments of the present application provide an electric device, including the battery as described in the above embodiments.

The above description is only an overview of the technical solution of the present application. In order to better understand the technical means of the present application, it can be implemented according to the contents of the description, and in order to make the above and other purposes, features and advantages of the present application more obvious and understandable , the following specifically cites the specific implementation manner of the present application.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the accompanying drawings that need to be used in the embodiments or exemplary technical descriptions. Obviously, the accompanying drawings in the following descriptions are only for this application. For some embodiments, those of ordinary skill in the art can also obtain other drawings based on these drawings without creative effort.

FIG. 1 is a schematic structural view of a vehicle in some embodiments of the present application;

FIG. 2 is a schematic diagram of an exploded structure of a battery in some embodiments of the present application;

FIG. 3 is a schematic top view of a battery in some embodiments of the present application;

Fig. 4 is a schematic cross-sectional structure diagram along line A-A in Fig. 3;

Fig. 5 is an enlarged view of part B in Fig. 4;

Fig. 6 is a schematic diagram of an exploded structure of a battery fire protection device according to some embodiments of the present application;

Fig. 7 is a schematic diagram of an exploded structure of a battery fire prevention device according to another embodiment of the present application;

Fig. 8 is a schematic cross-sectional structural view of the battery fire protection device in some embodiments of the present application;

Fig. 9 is a schematic diagram of an exploded structure of the battery fire protection device in Fig. 8;

Fig. 10 is a schematic cross-sectional structural view of the battery fire protection device in other embodiments of the present application;

Fig. 11 is a schematic cross-sectional structural view of the battery fire protection device in other embodiments of the present application;

Fig. 12 is a schematic cross-sectional structural view of the battery fire protection device in some other embodiments of the present application;

FIG. 13 is a schematic cross-sectional structural view of the battery fire protection device in some other embodiments of the present application.

Among them, the main marks of each accompanying drawing in the figure are:

1000-vehicle; 1001-battery; 1002-controller; 1003-motor;

100-battery box; 10-box body; 101-exhaust chamber; 11-first part; 12-second part;

20-explosion-proof valve;

30-battery fire prevention device; 31-casing; 310-accommodating cavity; 311-nozzle; 312-flow guide channel; 313-circulation channel; 32-heat exchange tube;

40 - battery cell.

Detailed ways

In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application clearer, the present application will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present application, and are not intended to limit the present application.

Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field of the application; the terms used herein are only for the purpose of describing specific embodiments, and are not intended to To limit this application; the terms "comprising" and "having" and any variations thereof in the specification and claims of this application and the description of the above drawings are intended to cover a non-exclusive inclusion.

In the description of the embodiments of the present application, the technical terms "first", "second" and so on are only used to distinguish different objects, and should not be understood as indicating or implying relative importance or implicitly indicating the number of indicated technical features, A specific order or primary-secondary relationship. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features.

Reference herein to an "embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the present application. The occurrences of this phrase 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. It is understood by those skilled in the art, both explicitly and implicitly, that the embodiments described herein may be combined with other embodiments in any suitable manner.

In the description of the embodiment of the present application, the term "and/or" is only a kind of association relationship describing associated objects, which means that there may be three kinds of relationships, such as A and/or B, which may mean: A exists alone, and A exists at the same time and B, there are three cases of B alone. In addition, the character "/" in this article generally indicates that the contextual objects are an "or" relationship.

In the description of the embodiments of this application, the term "multiple" refers to more than two (including two), similarly, "multiple groups" refers to two or more groups (including two), and "multiple pieces" refers to More than two pieces (including two pieces). "Several" means one or more than one, unless otherwise clearly and specifically defined.

In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear" , "Left", "Right", "Vertical", "Horizontal", "Top", "Bottom", "Inner", "Outer", "Clockwise", "Counterclockwise", "Axial", " The orientation or positional relationship indicated by "radial", "circumferential", etc. is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of describing the embodiment of the present application and simplifying the description, rather than indicating or implying the referred device or Elements must have certain orientations, be constructed and operate in certain orientations, and therefore should not be construed as limitations on the embodiments of the present application.

In the description of the embodiments of this application, unless otherwise clearly specified and limited, terms such as "installation", "connection", "connection", and "fixation" should be understood in a broad sense, for example, it can be a fixed connection, or It can be a detachable connection, or integrated; it can also be a mechanical connection, it can also be an electrical connection; it can be directly connected or indirectly connected through an intermediary, and it can be the internal communication of two components or the interaction of two components relation. Those of ordinary skill in the art can understand the specific meanings of the above terms in the embodiments of the present application according to specific situations.

In the description of the embodiments of the present application, unless otherwise clearly specified and limited, when an element is referred to as being "fixed" or "disposed on" another element, it may be directly on another element or indirectly on the other element. component. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

In the description of the embodiments of the present application, unless otherwise specified and limited, the technical term "adjacent" refers to close in position. For example, A ₁ , A ₂ and B are three parts, the distance between A ₁ and B is greater than the distance between A ₂ and B, then A ₂ is closer to B than A ₁ , that is, _{A 2 is} adjacent B, it can also be said that B is adjacent to A ₂ . For another example, when there are multiple C components, the multiple C components are respectively C ₁ , C ₂ ... C _N , when one of the C components, such as C ₂ , is closer to B than other C components, then B is adjacent to C ₂ , it can also be said that C ₂ is adjacent to B.

The battery cells in the present application may include lithium-ion secondary batteries, lithium-ion primary batteries, lithium-sulfur batteries, sodium-lithium-ion batteries, sodium-ion batteries, or magnesium-ion batteries, which are not limited in the embodiments of the present application. The battery cell can be in the form of a cylinder, a flat body, a cuboid or other shapes, which is not limited in this embodiment of the present application. Battery cells are generally divided into three types according to packaging methods: cylindrical battery cells, square battery cells and pouch battery cells, which are not limited in this embodiment of the present application.

The battery mentioned in the embodiments of the present application refers to a single physical module including one or more battery cells to provide higher voltage and capacity. For example, the battery mentioned in this application may include a battery module or a battery pack, and the like. Batteries generally include a case for enclosing one or more battery cells. The box can prevent liquid or other foreign objects from affecting the charging or discharging of the battery cells. In some cases, battery cells may also be used directly, that is, the battery may not include a case, which is not limited herein.

In a battery, when there are multiple battery cells, the multiple battery cells can be connected in series, in parallel, or in parallel. The mixed connection means that there are both series and parallel connections among the multiple battery cells. Multiple battery cells can be directly connected in series or parallel or mixed together, and then the whole body composed of multiple battery cells can be accommodated in the box; of course, the battery can also be connected in series, parallel or mixed first. Multiple battery modules are connected in series or in parallel or mixed to form a whole, and are housed in the box. The battery may also include other structures, for example, the battery may also include a bus component for realizing electrical connection between multiple battery cells.

The battery cell in the embodiment of the present application includes an electrode assembly and a casing, the electrode assembly is installed in the casing, and the electrode assembly is protected by the casing.

The electrode assembly is also called a cell, and the electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The electrode assembly mainly relies on the movement of metal ions between the positive and negative plates to work. The positive electrode sheet includes a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer is coated on the surface of the positive electrode current collector, and the part of the positive electrode current collector that is not coated with the positive electrode active material layer protrudes from the part that has been coated with the positive electrode active material layer The part not coated with the positive electrode active material layer is used as the positive electrode tab, or the positive electrode current collector is welded and a metal conductor is drawn out to serve as the positive electrode tab. Taking a lithium-ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer is coated on the surface of the negative electrode current collector, and the part of the negative electrode current collector that is not coated with the negative electrode active material layer protrudes from the part that has been coated with the negative electrode active material layer The part not coated with the negative electrode active material layer is used as the negative electrode tab, or the negative electrode current collector is welded and the metal conductor is drawn out to serve as the negative electrode tab. The material of the negative electrode current collector may be copper, and the negative electrode active material may be carbon or silicon. In order to ensure that a large current is passed without fusing, the number of positive pole tabs is multiple and stacked together, and the number of negative pole tabs is multiple and stacked together. It can be understood that, in the electrode assembly, the number of positive electrode tabs may be one, and the number of negative electrode tabs may also be one. That is to say, two sets of tabs are provided on the electrode assembly, and each set includes at least one tab, and one set of tabs is a positive tab, and the other set of tabs is a negative tab.

The electrode assembly can be a wound structure or a laminated structure. The embodiment of the present application is not limited thereto. Most of the winding structure is to weld the tabs to the current collector, and then arrange them in the order of positive electrode sheet-diaphragm-negative electrode sheet-diaphragm; and then form a cylindrical or square cell by winding. The laminated structure mostly draws out the tabs on the current collector, and arranges the positive electrode, negative electrode and diaphragm in the order of positive electrode-diaphragm-negative electrode-diaphragm, and stacks them layer by layer to form a laminated cell; , the diaphragm can be cut and laminated directly with the diaphragm sheet, or the diaphragm can be folded and stacked in a Z shape without cutting the diaphragm. The material of the diaphragm can be PP (Polypropylene, polypropylene) or PE (Polyethylene, polyethylene), etc. The separator is an insulating film arranged between the positive electrode and the negative electrode. Its main function is to isolate the positive and negative electrodes and prevent the electrons in the battery from freely passing through, preventing short circuits, and allowing the ions in the electrolyte to flow between the positive and negative electrodes. Pass freely between them to form a loop between the positive and negative poles. The positive electrode sheet and the negative electrode sheet are collectively referred to as the electrode sheet. The positive pole tab and the negative pole tab are collectively referred to as tabs.

When the battery is in use, its electrode assembly sometimes suffers from thermal runaway, especially when the battery is squeezed, bumped, or impacted, it is easy to cause thermal runaway. After the battery is thermally runaway, a mixture containing a large amount of flammable gas will be generated and the pressure in the battery will increase. When the battery reaches a certain pressure, the explosion-proof valve will be opened to spray out. In addition, due to the high surface temperature of the battery during the eruption process, if the eruption from the explosion-proof valve contacts with the oxygen in the external environment, it is easy to generate an open flame, which will generate continuous heat and burn around the battery pack, which is more harmful. Therefore, it is necessary to Fireproof the battery. At present, fire retardants with porous channels are mostly installed at the explosion-proof valve of the battery to cool the eruption, so as to achieve the effects of fire resistance and fire prevention. The heat is dissipated to the external environment, the cooling efficiency is low, and the fire performance is poor.

Based on the above considerations, in order to solve the problem of poor cooling efficiency of the fireproof device on the battery to the explosion-proof valve spray, the embodiment of the present application provides a battery fireproof device. The agent generates cold energy to actively cool down the eruption of the explosion-proof valve, so as to improve the efficiency of cooling the eruption, so that the temperature of the eruption can be dropped rapidly, so that the burning speed of the eruption is lower than the jet velocity, so that the eruption can burn The flame cannot be maintained stably, so as to achieve the effect of fire extinguishing and fire prevention. The burning rate refers to the amount of combustibles burned per unit time. Jet velocity refers to the amount of eruption ejected per unit time.

Cold is a unit concept of energy or energy. Cooling capacity is the total energy value of cooling equipment or heat conduction facilities (such as coolers) that consumes the heat of the target space through refrigeration or the total energy value of the heat derived from the target space in a unit of time or a period of time. In some cases, cooling Quantities are also known as "negative calories".

The batteries disclosed in the embodiments of the present application can be used in electrical equipment using batteries as power sources or in various energy storage systems using batteries as energy storage components, such as in hydraulic, thermal, wind and solar power stations and other energy storage power systems. Electric equipment can be, but not limited to, mobile phones, tablets, laptops, electric toys, electric tools, electric bicycles, electric motorcycles, electric vehicles, ships, spacecraft, etc. Among them, electric toys may include fixed or mobile electric toys, such as game consoles, electric car toys, electric boat toys, electric airplane toys, etc., and spacecraft may include airplanes, rockets, space shuttles, spaceships, etc.

For convenience of description, an embodiment of the present application is used to provide an electric device, and the electric device is described by taking a vehicle as an example.

Please refer to FIG. 1 , which is a schematic structural diagram of a vehicle 1000 provided by some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle. The interior of the vehicle 1000 is provided with a battery 1001 , and the battery 1001 may be provided at the bottom, head or tail of the vehicle 1000 . The battery 1001 can be used for power supply of the vehicle 1000 , for example, the battery 1001 can be used as an operating power source of the vehicle 1000 . The vehicle 1000 may further include a controller 1002 and a motor 1003 , the controller 1002 is used to control the battery 1001 to supply power to the motor 1003 , for example, for starting, navigating and running the vehicle 1000 .

In some embodiments of the present application, the battery 1001 can not only be used as an operating power source for the vehicle 1000 , but can also be used as a driving power source for the vehicle 1000 to provide driving power for the vehicle 1000 instead of or partially replacing fuel oil or natural gas.

Please refer to FIG. 2 , which is a schematic diagram of an exploded structure of a battery 1001 provided by some embodiments of the present application. The battery 1001 includes a case 10 and battery cells 40 housed in the case 10 . Wherein, the box body 10 is used to provide accommodating space for the battery cells 40 , and the box body 10 may adopt various structures. In some embodiments, the box body 10 may include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 and the second part 12 jointly define a of accommodation space. The second part 12 can be a hollow structure with one end open, the first part 11 can be a plate-shaped structure, and the first part 11 covers the opening side of the second part 12, so that the first part 11 and the second part 12 jointly define an accommodation space ; The first part 11 and the second part 12 can also be hollow structures with one side opening, and the opening side of the first part 11 is covered by the opening side of the second part 12 . Of course, the box body 10 formed by the first part 11 and the second part 12 can be in various shapes, such as a cylinder, a cuboid and the like. A plurality of battery cells 40 are connected in parallel, in series or mixed, and placed in the box 10 formed by fastening the first part 11 and the second part 12 .

Please refer to FIG. 3 to FIG. 6 . FIG. 3 is a schematic top view of a battery 1001 according to some embodiments of the present application. Fig. 4 is a schematic cross-sectional structural diagram along line A-A in Fig. 3 . FIG. 5 is an enlarged view of part B in FIG. 4 . FIG. 6 is a schematic diagram of an exploded structure of a battery fire protection device 30 according to some embodiments of the present application.

The embodiment of the present application provides a battery fire protection device 30, which includes a casing 31, and the casing 31 is provided with an accommodating chamber 310, which is a chamber structure for storing substances. The casing 31 refers to a casing structure forming a chamber 310 for storing substances. That is to say, the casing 31 encloses the receiving cavity 310 . A refrigerant is provided in the accommodation cavity 310 , and the refrigerant refers to a substance that can generate cold in a controlled manner. The refrigerant is stored in the housing chamber 310 and can generate cold under control. When in use, the housing 31 is arranged at a corresponding position outside the explosion-proof valve 20 of the casing of the battery 1001 , so that the refrigerant is placed outside the explosion-proof valve 20 .

The outside of the explosion-proof valve 20 refers to the side where the outlet of the explosion-proof valve 20 is located. When the battery 1001 is thermally out of control, the eruption is ejected from the inside of the battery through the explosion-proof valve 20. 20 on the side where it was sprayed out. When the explosion-proof valve 20 separates the inside and outside of the casing of the battery 1001 , the casing 31 is located outside the explosion-proof valve 20 during use, and the casing 31 is actually located outside the casing of the battery 1001 . When the battery 1001 includes the battery fireproof device 30, and the explosion-proof valve 20 is inside the housing of the battery 1001, such as when a chamber or a cavity is provided in the housing to install the explosion-proof valve 20, the outside of the explosion-proof valve 20 is also at this moment. The interior of the housing, accordingly, the battery fire protection device 30 is located inside the housing.

When the battery 1001 is thermally out of control and the explosion-proof valve 20 ejects eruptions, the refrigerant is controlled to generate cold to actively cool down the eruptions and increase the speed of cooling. Since the combustion speed of combustibles is related to temperature, the higher the temperature, the higher the temperature. The faster the burning speed, the cooling of the eruption can reduce the burning speed of the eruption, so that the burning speed of the eruption is lower than the jet velocity of the eruption, so that the flame of the eruption cannot be maintained stably, so as to achieve fire extinguishing , The role of fire prevention.

In some embodiments, the refrigerant is a high-pressure incombustible gas stored in the accommodating cavity 310 , and the casing 31 is provided with a nozzle 311 that can be opened in a controlled manner. High-pressure non-flammable gas is used as refrigerant, which has high safety. The high-pressure non-combustible gas is ejected through the nozzle 311, the pressure of the high-pressure non-combustible gas decreases, the volume expands, and heat is absorbed, thereby generating cold energy to cool the eruption ejected from the explosion-proof valve 20. In addition, the non-combustible gas is used, It can also be used as a fire extinguisher. High-pressure incombustible gas means that the incombustible gas is compressed and its pressure is above 0.1 megapascal (Mpa), that is to say, the pressure of the incombustible gas is greater than or equal to 0.1Mpa. In some embodiments, the high-pressure incombustible gas may be stored in the containing cavity 310 in a liquid state to reduce the occupied space.

In some embodiments, carbon dioxide, nitrogen and other gases can be used as the non-combustible gas.

In some embodiments, the refrigerant includes ammonium salt and water. For example, two accommodating chambers 310 can be set in the casing 31, and a valve is arranged between the two accommodating chambers 310. One accommodating chamber 310 is provided with ammonium salt, and the other accommodating Water is set in the chamber 310, and when the explosion-proof valve 20 sprays out the eruption, the valve is opened to dissolve the ammonium salt in the water to absorb heat, thereby generating cold to actively cool down the eruption. The valve can be opened by pressure, temperature or battery management system control.

The battery management system (the full name of BMS is Battery Management System), which is a device that cooperates with monitoring the state of the energy storage battery 1001, is mainly for the intelligent management and maintenance of each battery 1001 unit, to prevent the battery 1001 from overcharging and over-discharging, and to extend the battery life of the battery 1001. The service life of the battery 1001 is monitored.

Ammonium salts are ionic compounds composed of ammonium ions and acid radical ions, generally obtained through the reaction of ammonia and acid. They are generally colorless crystals and are easily soluble in water.

In some embodiments, the spout 311 is provided with a pressure valve, and the pressure valve can be pushed open by the pressure of the eruption ejected by the explosion-proof valve 20, so that a pressure valve is set at the spout 311. When the explosion-proof valve 20 ejects the eruption, due to the eruption The pressure of the substance is relatively high, so that the pressure valve can be pushed open, so that the refrigerant in the casing 31 is sprayed out from the nozzle 311, so that the sprayed substance sprayed out by the explosion-proof valve 20 is cooled.

In some embodiments, the spout 311 is provided with a temperature control valve, and the temperature control valve can sense the temperature of the eruption ejected from the explosion-proof valve 20 to control opening, so that the temperature control valve is set at the spout 311. When erupting, because the temperature of the eruption is relatively high, under the action of this temperature, the temperature control valve is opened, so that the refrigerant in the casing 31 is ejected from the nozzle 311, so as to cool the eruption ejected from the explosion-proof valve 20 Cool down.

In some embodiments, the temperature control valve can be a valve structure made of a memory alloy, such as a memory alloy sheet. When the explosion-proof valve 20 ejects eruptions, the memory alloy sheet is deformed by the temperature of the eruption, so that the spout 311 When it is opened, the refrigerant sprays out to generate cold energy to cool down the hair.

In some embodiments, the nozzle 311 is provided with a control valve, and the control valve can be controlled and switched by the battery management system, for example, an electric valve, a solenoid valve, etc. can be used as the control valve. A control valve is set at the nozzle 311, and when the explosion-proof valve 20 ejects the eruption, it is controlled by the battery management system, so that the control valve is opened, and the refrigerant in the casing 31 is ejected from the nozzle 311, so as to spray the explosion-proof valve 20 The emitted eruption is cooled down.

In some embodiments, please refer to FIG. 5 and FIG. 6, the battery fire prevention device 30 also includes a heat exchange tube 32, the heat exchange tube 32 refers to a pipe that can perform heat exchange, such as a metal tube can be used as the heat exchange tube 32, also Pipe fittings made of materials with better thermal conductivity, such as plastic pipes with better thermal conductivity, can be used. When in use, the heat exchange tube 32 is arranged on the outside of the explosion-proof valve 20, and the heat exchange tube 32 is arranged around the explosion-proof valve 20, so that the spray generated by the explosion-proof valve 20 will enter the heat exchange tube 32, and the casing 31 is arranged on the explosion-proof valve 20. On the outside of the heat pipe 32 , the cold generated by the refrigerant in the casing 31 will be conducted to the heat exchange tube 32 to cool down the heat exchange tube 32 , and then cool down the eruption in the heat exchange tube 32 . By setting the heat exchange tube 32 , the cooling generated by the refrigerant in the casing 31 cools down the heat exchange tube 32 , and the eruption material is cooled down through the heat exchange tube 32 . Compared with using high-pressure gas as a refrigerant to directly cool the eruption, since the pressure of the high-pressure gas is much greater than that of the eruption, in order to avoid the impact of the high-pressure gas on the eruption and ensure the smooth flow of the eruption, it is necessary To ensure a high injection velocity of the high-pressure gas, this will lead to a very low utilization rate of the cooling capacity generated by the high-pressure gas. And the heat exchange tube 32 is set, the refrigerant directly cools the heat exchange tube 32, and then cools the eruption through the heat exchange tube 32, which will not block the discharge of the eruption, which makes the cold produced by the refrigerant can pass through the heat exchange tube 32 More fully cooling the eruption, especially when using high-pressure gas as the refrigerant, it can greatly increase the utilization rate of the cooling capacity generated by the high-pressure gas, thereby reducing the amount of refrigerant used, so as to save energy and use a smaller volume The casing 31 and the refrigerant in a smaller amount can further reduce the volume of the battery fire protection device 30 , so as to reduce the volume of the battery 1001 using the battery fire protection device 30 .

In some embodiments, heat transfer protrusions 321 are provided on the inner surface of the heat exchange tube 32 to increase the heat exchange area between the heat exchange tube 32 and the explosion-proof valve or the injected high-temperature gas, which can not only improve the heat exchange efficiency, but also reduce the cooling effect. The diffusion of energy to the environment improves the utilization rate of cooling energy for more energy saving.

Further, heat transfer protrusions 321 are also provided on the outer surface of the heat exchange tube 32 to increase the heat exchange area between the heat exchange tube 32 and the casing 31 , further improve the utilization rate of cooling capacity, and save energy.

In some embodiments, the heat conduction protrusion 321 includes fins. Fins refer to the sheet-like heat conduction structure, using fins, the heat exchange area is large, the effect is good, and it is easy to design.

In some embodiments, the heat conduction bump 321 includes bumps. Bumps refer to protruding point-like or block-like structures. Smaller-sized bumps have a point-like structure, and slightly larger-sized bumps have a block-like structure. The use of bumps is convenient for processing.

In some embodiments, the heat conduction protrusion 321 includes convex lines, also called convex lines. Relief refers to a textured structure in which protrusions are provided. The embossed pattern is convenient for processing and can enhance the structural strength of the heat exchange tube 32 . When the ridges are flat, they can also be called fins.

In some embodiments, the heat conduction protrusion 321 includes one or more of bumps and embossments, and one or more of the protrusions and embossments are used to form the heat conduction protrusion 321, which has a simple structure and is convenient for design and manufacture. .

In some embodiments, the heat exchange tube 32 is straight, simple in structure, easy to manufacture, small in size, and can reduce the resistance to the eruption, so that the eruption can be ejected more easily and reduce the impact on the inside of the battery 1001 .

In some embodiments, please refer to FIG. 5 and FIG. 6 , the casing 31 is arranged around the heat exchange tube 32 . By making the casing 31 surround the heat exchange tube 32, the cooling generated by the refrigerant in the casing 31 can be more evenly transmitted to the heat exchange tube 32, ensuring the effective use of the heat exchange area of the heat exchange tube 32 to improve the utilization efficiency of cooling capacity .

In some embodiments, a circulation channel 313 is provided at intervals between the casing 31 and the heat exchange tubes 32 , that is, the casing 31 and the heat exchange tubes 32 are arranged at intervals, so that the space between the casing 31 and the heat exchange tubes 32 The gaps between form a flow channel, which is the flow channel 313 . The casing 31 and the heat exchange tube 32 are arranged at intervals, which can facilitate the assembly between the casing 31 and the heat exchange tube 32, and when the refrigerant is sprayed, it is convenient to flow out from the circulation channel 313, so that the refrigerant can be sprayed and exchanged. The heat pipe 32 lowers the temperature. Especially when high-pressure non-combustible gas is used as the refrigerant, the gas can be ejected easily and flow out from the circulation channel 313 to cool down the heat exchange tube 32 .

In some embodiments, when the outer surface of the heat exchange tube 32 is provided with bumps or ridge-shaped heat conduction protrusions 321 , if there is a gap between different heat conduction protrusions 321 , the distal ends of the heat conduction protrusions 321 , That is to say, the end or free end, that is, the end of the heat transfer protrusion 321 away from the heat exchange tube 32, can be in contact with the casing 31, and the gap between the heat transfer protrusions 321 constitutes the circulation channel 313, which not only ensures that the heat exchange tube 32 The relative position to the casing 31 is more stable, and the heat exchange area can be increased to improve the heat exchange efficiency.

In some embodiments, the heat exchange tube 32 is in the shape of a straight tube, that is to say, the heat exchange tube 32 uses a straight tube, which has a simple structure, is convenient to manufacture, and is small in size.

In some embodiments, the explosion-proof valve 20 is a burst-proof disc, and the burst-proof disc refers to a structural component that releases pressure by breaking the diaphragm. The inner diameter of the heat exchange tube 32 is larger than the outer diameter of the explosion-proof disk, which can ensure that the explosion-proof disk can be opened well and avoid blocking the eruption.

In some embodiments, the anti-explosion valve 20 may also use a balance valve. Since there is a large pressure difference or flow difference in various parts of the liquid in the pipeline or container, in order to reduce or balance the difference, a valve is installed between the corresponding pipelines or containers to adjust the relative balance of pressure on both sides, or The balance of the flow is achieved by the method of shunting, and the valve is called a balance valve.

In some embodiments, a diversion passage 312 is provided in the casing 31, and the diversion passage 312 refers to a channel structure provided in the casing 31, and the casing 31 is arranged around the explosion-proof valve 20, that is, along the In the axial direction of 312, the projection of the explosion-proof valve 20 is in the diversion channel 312, so that the eruption ejected from the explosion-proof valve 20 will flow out through the diversion channel 312, and the cooling capacity generated by the refrigerant in the casing 31 can cool the eruption. Active cooling is carried out to improve the speed of cooling and the utilization rate of cooling capacity. The axial direction of the flow guide channel 312 specifically refers to the axial direction of the end of the flow channel 312 close to the explosion-proof valve 20 .

In some embodiments, the guide channel 312 is arranged in a straight line, that is to say, the guide channel 312 is a straight channel, which has a simple structure, is convenient to manufacture, and is small in size.

In some embodiments, when the casing 31 is provided with a flow guide channel 312, and the battery fire protection device 30 includes a heat exchange tube 32, the heat exchange tube 32 is arranged in the flow guide channel 312, so as to install the heat exchange tube 32, and The spray and the refrigerant are separated by the heat exchange tube 32, so that the cooling generated by the refrigerant is conducted through the heat exchange tube 32, so as to quickly cool down the spray and improve the utilization rate of cooling capacity, and this structure can also make the exchange The circumferential direction of the heat pipe 32 is cooled more evenly, so as to improve heat exchange efficiency.

In some embodiments, the heat exchange tube 32 is a straight tube, the flow guide channel 312 is a straight channel, and the central axes of the heat exchange tube 32 and the flow guide channel 312 coincide, so that the outer surface of the heat exchange tube 32 and the casing 31 The distance between them is uniform, so that the heat exchange tubes 32 are cooled more evenly, thereby improving the heat exchange efficiency. In some embodiments, when the refrigerant includes ammonium salt and water, the casing 31 can be attached to the outer surface of the heat exchange tube 32 so that the cooling generated by the refrigerant can be better conducted to the heat exchange tube 32 .

In some embodiments, when the refrigerant includes high-pressure incombustible gas, the casing 31 and the heat exchange tube 32 can be spaced apart, so that a communication channel 313 is formed between the casing 31 and the heat exchange tube 32 for the non-combustible gas to circulate.

In some embodiments, when the refrigerant includes high-pressure incombustible gas, and the heat exchange tube 32 is arranged in the guide channel 312 of the casing 31, the pressure of the non-flammable gas ejected from the casing 31 is much higher than that of the explosion-proof valve 20 The pressure of the eruption that ejects, then heat exchange tube 32 can separate the incombustible gas that casing 31 ejects from explosion-proof valve 20, can avoid the impact of the incombustible gas that casing 31 ejects on explosion-proof valve 20 like this, In order to ensure that the eruption can be discharged from the explosion-proof valve 20 smoothly, and will not cause the incombustible gas to pour back into the battery 1001 .

Please refer to FIG. 7 , which is a schematic diagram of an exploded structure of a battery fire protection device 30 provided in some embodiments of the present application.

In some embodiments, heat conduction protrusions 321 can be provided only on the outer surface of the heat exchange tube 32 to simplify the structure, and can increase the heat exchange area of the heat exchange tube 32, especially to be more conducive to the cooling capacity generated by the refrigerant. Conducted to the heat exchange tube 32, so as to cool down the eruption ejected from the explosion-proof valve 20 and improve the utilization rate of cooling capacity.

In some embodiments, heat conduction protrusions 321 may also be provided only on the inner surface of the heat exchange tube 32 to increase the heat exchange area and improve heat exchange efficiency.

Please refer to FIG. 8 and FIG. 9 . FIG. 8 is a schematic cross-sectional structural view of the battery fire protection device 30 in the battery 1001 according to some embodiments of the present application. FIG. 9 is a schematic diagram of an exploded structure of a battery fire protection device 30 according to some embodiments of the present application.

In some embodiments, the outer surface and the inner surface of the heat exchange tube 32 are arranged smoothly, that is to say, neither the outer surface nor the inner surface of the heat exchange tube 32 is provided with heat conduction protrusions 321 (please also refer to FIG. 6 ), which means The heat exchange tube 32 has a simple structure, simple processing and low cost.

Please refer to FIG. 10 . FIG. 10 is a schematic cross-sectional structure diagram of a battery fire protection device 30 in a battery 1001 according to some embodiments of the present application.

In some embodiments, the battery fire protection device 30 includes a casing 31 in which a refrigerant is disposed. Please also refer to FIG. 5 , the battery fire protection device 30 does not need to use the heat exchange tube 32 , and directly uses the cooling energy generated by the refrigerant in the casing 31 to cool the eruption.

In some embodiments, when the heat exchange tube 32 is not provided in the casing 31, the spray direction in the casing 31 can be tilted towards a direction away from the explosion-proof valve 20, which can reduce the impact of the incombustible gas sprayed from the casing 31 on The impact of the explosion-proof valve 20, so that the spray can be discharged from the explosion-proof valve 20 smoothly, and will not cause the incombustible gas to pour back into the battery 1001.

In some embodiments, a diversion passage 312 is provided in the casing 31, and the casing 31 is arranged around the explosion-proof valve 20, so that the spray from the explosion-proof valve 20 will flow out through the diversion passage 312, and the cooling in the casing 31 The cold energy generated by the agent can actively cool down the eruption, improving the cooling speed and cooling energy utilization.

Please refer to FIG. 11 . FIG. 11 is a schematic cross-sectional structure diagram of a battery fire protection device 30 in a battery 1001 according to some embodiments of the present application.

In some embodiments, the battery fire protection device 30 includes a casing 31 in which a refrigerant is disposed. Please also refer to Fig. 5, the battery fire protection device 30 does not need to use the heat exchange tube 32, the casing 31 is arranged on one side of the explosion-proof valve 20, and the refrigerant includes a high-pressure incombustible gas, so that the casing 31 sprays from the side of the explosion-proof valve 20 The refrigerant is used to mix and cool down with the eruption ejected from the explosion-proof valve 20 to increase the cooling speed. With this structure, due to the high speed of refrigerant ejection, a siphon effect will be generated to form a negative pressure at the explosion-proof valve 20 , thereby also ensuring that the eruption can be discharged from the explosion-proof valve 20 smoothly.

Please refer to FIG. 12 . FIG. 12 is a schematic cross-sectional structural view of the battery fire protection device 30 in the battery 1001 according to some embodiments of the present application.

In some embodiments, the battery fire protection device 30 includes a casing 31 and a heat exchange tube 32 , and the casing 31 is provided with refrigerant. The casing 31 is arranged on one side of the heat exchange tube 32, and the refrigerant includes a high-pressure incombustible gas, so that the casing 31 sprays a high-pressure incombustible gas to the heat exchange tube 32 to cool down the heat exchange tube 32, and further cool the heat exchange tube The eruption in 32 is cooled down, and this structure is convenient for assembly.

Please refer to FIG. 13 . FIG. 13 is a schematic cross-sectional structural view of the battery fire protection device 30 in the battery 1001 according to some embodiments of the present application.

In some embodiments, the flow guide channel 312 is curved, which can increase the heat exchange area, facilitate cooling of the eruption flowing through the flow guide channel 312, and improve the utilization rate of cooling capacity.

In some embodiments, the battery fire protection device 30 includes a heat exchange tube 32, and the heat exchange tube 32 is bent to increase the heat exchange area and improve the utilization rate of cooling capacity.

In some embodiments, the flow guide channel 312 is curved, and the heat exchange tube 32 is arranged in the flow guide channel 312. The heat exchange tube 32 is curved, which can not only increase the heat exchange area of the heat exchange tube 32, but also increase the heat exchange area in the casing 31. The cooling capacity generated by the refrigerant can cool down the heat exchange tube 32 over a larger area, so as to cool down the eruption faster.

According to some embodiments of the present application, the present application provides a battery fire protection device 30, which includes a casing 31 and a heat exchange tube 32. The casing 31 has an accommodating chamber 310, and a refrigerant is stored in the accommodating chamber 310, and the refrigerant can be Close to produce cold. The heat exchange tube 32 is installed in the casing 31, and the heat exchange tube 32 is installed on the outside of the explosion-proof valve 20, so that when the explosion-proof valve 20 ejects the eruption, the cold generated by the refrigerant is conducted through the heat exchange tube 32 to The eruption undergoes rapid cooling and cooling. Both the outer surface and the inner surface of the heat exchange tube 32 are provided with heat conduction protrusions 321 to connect a large heat exchange area and improve heat exchange efficiency.

According to some embodiments of the present application, please refer to FIG. 2 to FIG. 4 , the present application provides a battery box 100, including a box body 10, an explosion-proof valve 20 and a battery fire prevention device 30 as described in any of the above embodiments, and the explosion-proof valve 20 is installed on the box body 10 , and the casing 31 of the battery fire protection device 30 is installed on the box body 10 . Therefore, when the electrode assembly in the box 10 is thermally runaway, the battery fire prevention device 30 can spray out cold energy to cool down the eruption sprayed from the explosion-proof valve 20 to improve the cooling speed and efficiency.

In some embodiments, an explosion-proof valve 20 can be arranged on the box body 10, and a battery fire-proof device 30 can be installed at the corresponding position of the explosion-proof valve 20, so that when the electrode assembly in the box body 10 has thermal runaway, the battery fire-proof device 30 can spray Cooling capacity is used to cool down the eruption ejected from the explosion-proof valve 20 to improve the cooling speed and efficiency.

In some embodiments, a plurality of explosion-proof valves 20 can be arranged on the box body 10, and the side of each explosion-proof valve 20 is provided with a casing 31 storing refrigerant, so as to cool down the ejecta ejected from each explosion-proof valve 20 .

In some embodiments, the explosion-proof valve 20 can be arranged on one side of the box body 10, such as the box body 10 can include a first part 11 and a second part 12, the first part 11 and the second part 12 cover each other, and the first part 11 Together with the second part 12 , it defines an accommodating space for accommodating the battery cells 40 ;

According to some embodiments of the present application, the present application provides a battery 1001 , including the battery box 100 described in the above embodiments and the battery cells 40 disposed in the battery box 100 . Since the case body 10 of the battery box 100 is provided with a casing 31 storing refrigerant, the temperature of the eruption emitted by the explosion-proof valve 20 can be cooled, thereby improving the safety of the battery 1001 .

In some embodiments, a battery cell 40 is installed in the box body 10 of the battery box 100 , and the battery cell 40 is a main power supply device of the battery 1001 .

In some embodiments, the height of the box body 10 is smaller than that of the battery cells 40 , so that the top of the box body 10 (ie) can form an exhaust bin 101 . It can be understood that a separate chamber can also be designed in the box body 10 to be used as the exhaust chamber 101 .

According to some embodiments of the present application, the present application also provides an electric device, including the battery described in any of the above solutions.

The powered device may be any of the aforementioned devices or systems using batteries.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, rather than limiting them; although the application has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: It is still possible to modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the technical solutions of the various embodiments of the present application. All of them should be covered by the scope of the claims and description of the present application. In particular, as long as there is no structural conflict, the technical features mentioned in the various embodiments can be combined in any manner. The present application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims (17)

1. A battery fire prevention device, characterized in that it comprises: The casing has an accommodating cavity, and the casing is used to be installed on the outside of the explosion-proof valve of the battery; The refrigerant is arranged in the accommodating chamber and can generate cold under control to cool down the eruption ejected from the explosion-proof valve, so that the combustion velocity of the eruption is lower than the jet velocity. 2 . The battery fire prevention device according to claim 1 , further comprising a heat exchange tube disposed around the explosion-proof valve, and the casing is disposed outside the heat exchange tube. 3 . 3. The battery fire prevention device according to claim 2, characterized in that: the inner and/or outer surfaces of the heat exchange tubes are provided with heat conducting protrusions. 4 . The battery fire protection device according to claim 3 , wherein the heat conduction protrusions comprise bumps and/or ridges. 5. The battery fire prevention device according to claim 2, wherein the heat exchange tube is straight, or the heat exchange tube is bent. 6 . The battery fire protection device according to claim 2 , wherein the casing is arranged around the heat exchange tube. 7 . 7 . The battery fire protection device according to claim 2 , wherein a communication channel is provided between the casing and the heat exchange tube. 8 . 8. The fire protection device for batteries according to claim 7, characterized in that: the outer surface of the heat exchange tube is provided with a plurality of heat conduction protrusions at intervals, and the end of the heat conduction protrusions away from the heat exchange tube is in contact with the said heat exchange tube. The chassis is connected. 9. The fire protection device for batteries according to any one of claims 1-8, wherein a guide channel is provided in the casing for the eruption ejected from the explosion-proof valve to pass through, and the explosion-proof valve is along the The axial projection of the flow guide channel is located in the flow guide channel. 10. The battery fire prevention device according to claim 9, characterized in that: the flow guide channel is arranged in a straight line, or the flow guide channel is arranged in a bend. 11. The battery fire prevention device according to any one of claims 1-8, wherein the refrigerant is a high-pressure incombustible gas stored in the accommodating cavity, and a controllable device is installed on the casing. Open spout. 12 . The battery fire protection device according to claim 11 , wherein the nozzle is provided with a pressure valve that can be opened by the pressure of the eruption ejected from the explosion-proof valve. 13 . 13. The battery fire protection device according to claim 11, characterized in that: the nozzle is provided with a temperature control valve capable of sensing the temperature of the eruption ejected from the explosion-proof valve to control opening. 14. The fire prevention device for batteries according to claim 11, characterized in that: the nozzle is provided with a control valve controlled and switched by the battery management system. 15. A battery box, characterized in that it includes a box body, an explosion-proof valve and the battery fire protection device according to any one of claims 1-14, the explosion-proof valve is installed on the box body, and the battery fireproof device The device is installed on the box body, and the casing is installed on the outside of the explosion-proof valve. 16. A battery, characterized by comprising the battery box according to claim 15 and the battery cells arranged in the battery box. 17. An electric device, characterized by comprising the battery according to claim 16.

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