Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises single batteries, a box body and a fire fighting module, a containing cavity is formed in the box body, the single batteries are contained in the containing cavity, and a pressure relief structure is arranged on the box body; the fire-fighting module is positioned in the accommodating cavity and is arranged on the box body; a hot melting structure is arranged on the fire-fighting module, the fire-fighting module is configured to release a fire-fighting medium after the hot melting structure is triggered, and the fire-fighting module and the pressure relief structure are arranged on the same side wall surface of the box body; according to the battery device provided by the embodiment of the invention, the fire-fighting module can release the fire-fighting medium and act on the high-temperature combustible flue gas, so that the combustible particles in the high-temperature combustible flue gas are covered by the fire-fighting medium, the probability that the high-temperature combustible flue gas is combusted after being discharged to the outside from the pressure relief structure is lower, and meanwhile, the safety of the battery device is improved. And the released fire-fighting medium can be dispersed in the box body and extinguishes a fire point, so that the effect of inhibiting thermal runaway is achieved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of batteries, and particularly provides a battery device and a power utilization device. BACKGROUND

[0002] With the wide application of new energy vehicles, the safety of power batteries becomes a crucial issue. During use, power batteries may have dangerous situations such as thermal runaway and fire, which seriously threaten the safety of vehicles and personnel.

[0003] When the power battery has thermal runaway, the high-temperature combustible smoke generated by the thermal runaway inside the power battery will be discharged outward from the pressure relief valve provided on the box body to form a pressure relief effect. However, the high-temperature combustible smoke sprayed outward from the pressure relief valve is easy to burn in the external environment, thereby causing the external structure to be easily ignited. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiments of the present application is to provide a battery device and a power utilization device, aiming to solve the problem that the battery device is easy to burn in the external environment when spraying high-temperature combustible smoke outward through the pressure relief valve, thereby igniting the external structure.

[0005] To achieve the above-mentioned purpose, the technical solution adopted by the embodiments of the present application is as follows:

[0006] In a first aspect, the embodiments of the present application provide a battery device, comprising a battery monomer, a box body, and a fire-fighting module. The box body is internally provided with a containing cavity, and the battery monomer is accommodated in the containing cavity. The box body is provided with a pressure relief structure. The fire-fighting module is located in the containing cavity and is arranged on the box body. The fire-fighting module is provided with a hot melting structure, and the fire-fighting module is configured to release a fire-fighting medium after the hot melting structure is triggered. The fire-fighting module and the pressure relief structure are arranged on the same side wall surface of the box body.

[0007] The battery device provided by the embodiments of the present application has the following beneficial effects: by arranging the fire-fighting module in the containing cavity inside the box body and arranging the fire-fighting module and the pressure relief structure on the same side wall surface of the box body, when the battery monomer inside the box body has thermal runaway, the high-temperature combustible smoke generated by the thermal runaway can be discharged to the outside of the box body through the pressure relief structure to form a pressure relief effect. The hot melting structure of the fire-fighting module located on the same side wall surface as the pressure relief structure can be melted by the high-temperature combustible smoke sprayed by the valve in time, so that the fire-fighting module can be triggered in time and release the fire-fighting medium. The released fire-fighting medium can act on the high-temperature combustible smoke, so that the combustible particles in the high-temperature combustible smoke are covered by the fire-fighting medium, thereby reducing the probability of combustion of the high-temperature combustible smoke after being discharged to the outside through the pressure relief structure. In this way, the probability of the high-temperature combustible smoke igniting the structure outside the box body is also reduced. At the same time, the released fire-fighting medium can also diffuse inside the box body and perform fire extinguishing operation on the ignition point, so as to achieve the effect of inhibiting thermal runaway.

[0008] In some embodiments, the box includes a first box and a second box, the first box includes a bottom wall and a side wall, the battery monomers are arranged on the bottom wall, and the side wall is arranged at the outer edge of the bottom wall. The second box is connected to the end of the side wall away from the bottom wall, and the second box is jointly enclosed with the bottom wall and the side wall to form a containing cavity; the fire-fighting module and the pressure relief structure are arranged on the same side wall surface of the side wall.

[0009] By adopting the above technical scheme, the fire-fighting module and the pressure relief structure can be arranged on the same side wall of the first box to achieve the effect of forming pressure relief from the side. At the same time, the assembly of the pressure relief structure and the fire-fighting module can reduce the influence on the structure of the second box, so that the structural strength of the second box is more optimal.

[0010] In some embodiments, the battery device includes a plurality of battery monomers arranged in sequence along a first direction; the battery device further includes a battery management system accommodated in the containing cavity; in the first direction, the battery management system is located on one side of the plurality of battery monomers arranged in sequence, and the battery management system is electrically connected to the battery monomers and the fire-fighting module; wherein, in the first direction, the fire-fighting module is arranged on the side of the plurality of battery monomers facing the battery management system.

[0011] By adopting the above technical scheme, the battery management system is arranged on one side of the plurality of battery monomers arranged in sequence, and the fire-fighting module is arranged on the side of the plurality of battery monomers facing the battery management system, so that the fire-fighting module and the battery management system are located on the same side of the plurality of battery monomers, and the distance between the fire-fighting module and the battery management system is smaller. In this way, the wiring and installation process between the fire-fighting module and the battery management system can be simplified, and the maintenance cost and failure rate can be reduced.

[0012] In some embodiments, the distance between the fire-fighting module and the pressure relief structure is m, and 15cm≤m≤30cm.

[0013] By adopting the above technical scheme, the distance m between the fire-fighting module and the pressure relief structure is set to be greater than or equal to 15 centimeters and less than or equal to 30 centimeters. The fire-fighting module can extinguish the high-temperature flammable smoke to be discharged from the pressure relief structure within this distance range, so as to effectively reduce the probability of fire caused by the high-temperature flammable smoke being discharged to the outside of the box and causing a fire.

[0014] In some embodiments, the battery device further includes a sensor assembly electrically connected to the battery management system, and the sensor assembly is used to detect at least one of a voltage parameter, a current parameter, and a temperature parameter in the containing cavity.

[0015] By adopting the technical scheme, at least one of the voltage parameter, the current parameter and the temperature parameter in the accommodating cavity is detected by the sensor assembly to determine the thermal runaway condition, so that the fire-fighting module can be controlled by the battery management system to release the fire-fighting medium, the accuracy of the thermal runaway condition determination is improved, and the timeliness of the release of the fire-fighting module is improved.

[0016] In some embodiments, the sensor assembly includes a temperature sensor electrically connected to the battery management system, and the temperature sensor is configured to detect the temperature parameter in the accommodating cavity; and the battery management system is configured to send a control signal to the fire-fighting module to release the fire-fighting medium when the temperature parameter detected by the temperature sensor is greater than a preset value.

[0017] By adopting the technical scheme, the temperature parameter in the accommodating cavity can be determined by the temperature sensor, and when the temperature parameter is greater than a preset value, it can be determined that the thermal runaway occurs, so that the battery management system can send a control signal to the fire-fighting module to release the fire-fighting medium to deal with the fire and perform fire-fighting treatment on the high-temperature flammable smoke of the spray valve.

[0018] In some embodiments, the sensor assembly includes an electrical signal sensor electrically connected to the battery management system, and the electrical signal sensor is configured to detect the voltage parameter and the current parameter of the battery cell; and the battery management system is configured to send a control signal to the fire-fighting module to release the fire-fighting medium when the change of the voltage parameter and the current parameter detected by the electrical signal sensor reaches a preset value.

[0019] By adopting the technical scheme, the voltage parameter and the current parameter of the battery cell can be determined by the electrical signal sensor, and when the voltage parameter and the current parameter reach a preset value, it can be determined that the thermal runaway occurs, so that the battery management system can send a control signal to the fire-fighting module to release the fire-fighting medium to deal with the fire and perform fire-fighting treatment on the high-temperature flammable smoke of the spray valve.

[0020] In some embodiments, the battery device further includes a gas concentration detection device electrically connected to the battery management system, and the gas concentration detection device is arranged in the accommodating cavity and is configured to detect the gas concentration in the accommodating cavity; and the battery management system is configured to send a control signal to the fire-fighting module to release the fire-fighting medium when the gas concentration detected by the gas concentration detection device is greater than a preset value.

[0021] By adopting the technical scheme, the gas concentration detection device can detect the flue gas generated by combustion in the box, and when the gas concentration detection device detects that the gas concentration is greater than the preset value, it can be judged that thermal runaway occurs, so that the battery management system can send a control signal to the fire-fighting module to make the fire-fighting module release the fire-fighting medium to deal with the fire and perform fire-fighting treatment on the high-temperature flammable smoke of the spray valve.

[0022] In some embodiments, the battery management system is configured to send a control signal to the fire-fighting module to make the fire-fighting module release the fire-fighting medium when at least one of the thermal fuse structure, the sensor assembly and the gas concentration detection device is triggered.

[0023] By adopting the technical scheme, at least one of the thermal fuse structure, the sensor assembly and the gas concentration detection device is triggered to judge that thermal runaway occurs, so that the battery management system can control the fire-fighting module to perform the release operation, thereby effectively improving the timeliness of thermal runaway judgment, and further improving the response speed of the fire-fighting module to reduce the impact of thermal runaway.

[0024] In a second aspect, the embodiments of the present application also provide an electric device, which comprises the battery device as described above, and the battery device is used to provide electric energy.

[0025] The electric device provided by the embodiments of the present application comprises the battery device as described above, and thus the reliability of the electric device is better.

[0026] In some embodiments, the electric device further comprises a display device, and the battery device comprises a battery management system, a fire-fighting module, a sensor assembly and a gas concentration detection device, the fire-fighting module, the sensor assembly and the gas concentration detection device are electrically connected to the battery management system, and the display device is electrically connected to the battery management system.

[0027] The display device of the electric device can display the data and state of the fire-fighting module, the sensor assembly and the gas concentration detection device in real time, so as to facilitate the observation and judgment of the user. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related technical descriptions will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0029] Figure 1 The structural schematic diagram of the vehicle provided by the embodiments of the present application is shown in the figure;

[0030] Figure 2An exploded view of a battery device provided by an embodiment of the present application;

[0031] Figure 3 A decomposition structural schematic view of a battery cell provided by an embodiment of the present application;

[0032] Figure 4 An internal structural schematic view of a first box provided by an embodiment of the present application;

[0033] Figure 5 A distribution structural schematic view of a fire-fighting module and a pressure relief structure provided by an embodiment of the present application on the same side wall surface of the first box;

[0034] Figure 6 A distribution structural schematic view of a fire-fighting module in a receiving cavity provided by an embodiment of the present application;

[0035] Figure 7 Another distribution structural schematic view of a fire-fighting module in a receiving cavity provided by an embodiment of the present application;

[0036] Figure 8 A triggering schematic view of a fire-fighting module provided by an embodiment of the present application.

[0037] In the drawings, various reference numerals refer to:

[0038] 1000, vehicle;

[0039] 100, battery device; 200, controller; 300, motor;

[0040] 10, box; 11, first box; 111, bottom wall; 112, side wall; 12, second box; 101, receiving cavity;

[0041] X, first direction;

[0042] 20, battery cell; 21, end cover; 21a, electrode terminal; 22, shell; 23, electrode assembly; 23a, tab;

[0043] 30, fire-fighting module; 31, heat melting structure;

[0044] 40, pressure relief structure; 50, battery management system;

[0045] 60, sensor assembly; 61, temperature sensor; 62, electric signal sensor;

[0046] 70, gas concentration detection device. DETAILED DESCRIPTION

[0047] Embodiments of the present application are described below in detail with reference to examples thereof illustrated in the accompanying drawings, wherein like or similar elements across the various figures are denoted by like or similar reference numerals, and the embodiments described below are illustrative only and are not intended to limit the present application.

[0048] In the description of the present application, it needs to be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0050] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0051] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as industrial equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0052] With the wide application of new energy vehicles, the safety of power batteries becomes a crucial issue. During the use of power batteries, dangerous situations such as thermal runaway and fire may occur, which poses a serious threat to vehicle and personnel safety. When the power battery experiences thermal runaway, the high-temperature flammable smoke generated by the thermal runaway inside the power battery will be discharged from the pressure relief valve provided on the box body of the power battery to form a pressure relief effect. However, the high-temperature flammable smoke discharged from the pressure relief valve is prone to combustion in the external environment, thereby easily igniting the external structure.

[0053] Based on the above considerations, in order to solve the problem that the battery device is prone to combustion in the external environment when discharging high-temperature flammable smoke from the pressure relief valve, a battery device is designed. By providing a fire-fighting module in the accommodating cavity inside the box body of the battery device, and arranging the fire-fighting module and the pressure relief structure on the same side wall surface of the box body, when the battery monomer in the accommodating cavity experiences thermal runaway, the high-temperature flammable smoke generated in the process of being discharged from the pressure relief structure can be extinguished by the fire-fighting module releasing fire-fighting medium, thereby effectively reducing the probability of the discharged high-temperature flammable smoke combusting in the external environment, and further effectively reducing the probability of the high-temperature flammable smoke igniting the external structure and causing a fire.

[0054] The battery device disclosed in the embodiments of the present application can be used in various energy storage systems using the battery device as an energy storage element or in various electric devices using the battery device as a power source. The electric device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric automobile, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric automobile toy, an electric ship toy, and an electric aircraft toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0055] The following embodiments are described for convenience with a vehicle 1000 as an example of an electric device of an embodiment of the present application.

[0056] Please refer to Figure 1 , Figure 1A structural schematic of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel vehicle, a gas vehicle, or a new energy vehicle, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can further include a controller 200 and a motor 300, the controller 200 being used to control the battery device 100 to supply power to the motor 300, for example, for the working power demand of the vehicle 1000 during starting, navigation, and driving.

[0057] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0058] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 is provided for some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0059] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0060] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0061] In some embodiments, the battery device can be a battery pack, which includes a box body 10 and one or more battery cell assemblies accommodated in the box body 10.

[0062] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box body 10 by fixing the battery module in the box body 10.

[0063] As an example, the battery cell assembly can also be accommodated in the box body 10 by directly fixing a plurality of battery cells 20 in the box body 10.

[0064] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are buckled so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0065] As an example, the box 10 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly.

[0066] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0067] The technical solutions described in the embodiments of the present application are applicable to various electric devices using the battery cell 20, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc.

[0068] In the embodiments of the present application, the battery cell 20 can be a secondary battery, which means that the battery cell 20 can be activated by charging after discharging.

[0069] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0070] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery device. As Figure 3 , the battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23 and other functional components.

[0071] The end cover 21 refers to a component that covers the opening of the housing 22 to isolate the internal environment of the battery cell 20 from the external environment. The shape of the end cover 21 can be adapted to the shape of the housing 22 to fit the housing 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21 is less likely to deform when subjected to extrusion collision, allowing the battery cell 20 to have higher structural strength and improved safety performance. The end cover 21 can be provided with functional components such as electrode terminals 21a. The electrode terminals 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating member can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the housing 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating member can be plastic, rubber, etc.

[0072] The housing 22 is a component for fitting the end cover 21 to form the internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, electrolyte and other components. The housing 22 and the end cover 21 can be independent components, and an opening can be provided on the housing 22, and the end cover 21 is covered on the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the housing 22 can also be integrated, specifically, the end cover 21 and the housing 22 can form a common connection surface before other components enter the housing, and when it is necessary to seal the inside of the housing 22, the end cover 21 is covered on the housing 22. The housing 22 can be various shapes and various sizes, such as cuboid, cylinder, hexagonal prism, etc. Specifically, the shape of the housing 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the housing 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0073] The electrode assembly 23 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained in the housing 22. The electrode assembly 23 is mainly formed by winding or stacking positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The positive and negative electrode sheets have portions with active materials constituting the main body of the electrode assembly, and the portions of the positive and negative electrode sheets without active materials each constitute a tab 23a. The positive and negative tabs can be located together at one end of the main body or at two ends of the main body, respectively. During the charging and discharging process of the battery device 100, the positive and negative active materials react with the electrolyte, and the tabs 23a are connected to the electrode terminals 21a to form a current loop.

[0074] According to some embodiments of the present application, with reference to Figure 2 、 Figure 4 、 Figure 6 and Figure 7 , the embodiments of the present application provide a battery device 100, comprising a battery cell 20, a box body 10, and a fire extinguishing module 30. The box body 10 is internally provided with a containing cavity 101, and the battery cell 20 is accommodated in the containing cavity 101. The box body 10 is provided with a pressure relief structure 40. The fire extinguishing module 30 is located in the containing cavity 101, and the fire extinguishing module 30 is arranged on the box body 10. The fire extinguishing module 30 is provided with a thermal fuse structure 31, and the fire extinguishing module 30 is configured to release a fire extinguishing medium after the thermal fuse structure 31 is triggered. The fire extinguishing module 30 and the pressure relief structure 40 are arranged on the same side wall surface of the box body 10.

[0075] The fire extinguishing module 30 refers to a module structure for releasing a fire extinguishing medium. Exemplarily, in some embodiments, the fire extinguishing module 30 can adopt an aerosol fire extinguishing module 30, which is a device for fire suppression using aerosol technology. Aerosol is a kind of tiny suspended matter formed by solid particles or liquid droplets dispersed in gas, which can quickly contact the fire source, reduce the flame temperature, and suppress the spread of fire.

[0076] The fire extinguishing module 30 is provided with a thermal fuse structure 31, which can also be called a thermal sensitive wire. The thermal fuse structure 31 is usually composed of a resistance material (such as nickel-chromium alloy) or an alloy wire with a special melting point. When the ambient temperature exceeds a set critical value, the thermal fuse structure 31 will be physically broken or short-circuited, or the resistance will change, so as to play the role of alarm or power-off, thereby triggering the fire extinguishing module 30 to release the fire extinguishing medium.

[0077] In this way, the thermal fuse structure 31 can be used to sense the ambient temperature and be triggered to melt when the ambient temperature is greater than the preset value, so that the fire extinguishing module 30 releases the fire extinguishing medium to deal with the thermal runaway situation.

[0078] Exemplarily, in some embodiments, the thermal fuse structure 31 can adopt a nickel wire thermal sensitive wire. When the ambient temperature rises to the preset value, the resistance of the nickel wire thermal sensitive wire will increase, causing the current flowing through the nickel wire thermal sensitive wire to be cut off, or the nickel wire thermal sensitive wire to be melted, thereby triggering the fire extinguishing module 30 and making the fire extinguishing module 30 release the fire extinguishing medium.

[0079] The fire extinguishing module 30 is arranged on the box body 10. Optionally, the fire extinguishing module 30 can be fixedly assembled in the interior of the box body 10 by means of bonding, fastener connection, clamping, locking connection, etc. The number of the fire extinguishing module 30 can be one or any number of more than one.

[0080] The fire-fighting module 30 and the pressure relief structure 40 are arranged on the same side wall surface of the box 10; alternatively, the fire-fighting module 30 and the pressure relief structure 40 can be arranged on any side wall surface of the box 10. Exemplarily, in some embodiments, the box 10 comprises a lower box and an end plate capped on the lower box, the battery cells 20 are arranged in the lower box, and the fire-fighting module 30 and the pressure relief structure 40 can be arranged on the end plate, as shown in Figure 7 Alternatively, in other embodiments, the box 10 comprises a lower box and an end plate capped on the lower box, the battery cells 20 are arranged in the lower box, and the lower box comprises a bottom plate and a side plate arranged at the outer edge of the bottom plate, wherein the fire-fighting module 30 and the pressure relief structure 40 can be arranged on the side plate at one end along the stacking direction of the plurality of battery cells 20, as shown in Figure 6

[0081] The pressure relief structure 40 described above includes, but is not limited to, a pressure relief valve or a weak structure (e.g., a thin-walled structure with relatively weak structural strength, a fusible structure that will melt in a high-temperature environment) arranged on the box 10.

[0082] It should be understood that when the battery cells 20 are in thermal runaway and generate high-temperature flammable smoke, the high-temperature flammable smoke will be ejected outward from the pressure relief structure 40 of the box 10; the high-temperature flammable smoke will pass through the fire-fighting module 30 and melt the fusible structure 31 in the process of flowing toward the pressure relief structure 40, so as to trigger the fire-fighting module 30 to release the fire-fighting medium. Thus, the released fire-fighting medium can perform fire-fighting treatment on the high-temperature flammable smoke flowing toward the pressure relief structure 40, so that the fire-fighting medium can adhere to the surface of the combustible particles in the high-temperature flammable smoke, so that the combustible particles in the high-temperature flammable smoke are covered by the fire-fighting medium and are difficult to form combustion. Thus, after the high-temperature flammable smoke acted by the fire-fighting medium is discharged to the outside of the box 10, the probability of combustion is relatively low, so as to effectively reduce the probability of igniting the external structure.

[0083] ​The battery device 100 provided by the embodiments of the present application is characterized in that the fire-fighting module 30 is arranged in the accommodating cavity 101 inside the box body 10, and the fire-fighting module 30 and the pressure relief structure 40 are arranged on the same side wall surface of the box body 10. When the internal battery monomer 20 is in thermal runaway, the high-temperature combustible flue gas generated can be discharged to the outside of the box body 10 through the pressure relief structure 40 to form pressure relief. The heat melting structure 31 of the fire-fighting module 30 on the same side wall surface as the pressure relief structure 40 can be melted by the high-temperature combustible flue gas of the spray valve in time, so that the fire-fighting module 30 can be triggered in time and release the fire-fighting medium. The released fire-fighting medium can act on the high-temperature combustible flue gas, so that the combustible particles in the high-temperature combustible flue gas are covered by the fire-fighting medium, thereby reducing the probability of combustion of the high-temperature combustible flue gas after being discharged to the outside through the pressure relief structure 40. In this way, the probability of the high-temperature combustible flue gas igniting the structure outside the box body 10 is also reduced. At the same time, the released fire-fighting medium can also diffuse inside the box body 10 and perform fire extinguishing operation on the ignition point to achieve the effect of inhibiting thermal runaway.

[0084] Please refer to Figure 4 and Figure 6 In some embodiments, the box body 10 includes a first box body 11 and a second box body 12. The first box body 11 includes a bottom wall 111 and a side wall 112. The battery monomer 20 is arranged on the bottom wall 111. The side wall 112 is annularly arranged at the outer edge of the bottom wall 111. The second box body 12 is connected to one end of the side wall 112 away from the bottom wall 111. The second box body 12, the bottom wall 111 and the side wall 112 jointly enclose the accommodating cavity 101. The fire-fighting module 30 and the pressure relief structure 40 are arranged on the same side wall surface of the side wall 112.

[0085] The bottom wall 111 and the side wall 112 can be integrally formed by an extrusion aluminum integral molding process. Alternatively, the bottom wall 111 and the side wall 112 can be connected by splicing to form an integral structure.

[0086] The battery monomer 20 is arranged on the bottom wall 111. The battery monomer 20 can be connected to the bottom wall 111 by adhesion.

[0087] The side wall 112 is annularly arranged at the outer edge of the bottom wall 111. The second box body 12 is connected to one end of the side wall 112 away from the bottom wall 111. In this way, the second box body 12 covers the area enclosed by the bottom wall 111 and the side wall 112 to form the accommodating cavity 101. The second box body 12 can be, but is not limited to, an end plate structure, a box body 10 structure, a cover structure, etc.

[0088] In the embodiment, the fire-fighting module 30 and the pressure relief structure 40 are arranged on the same side wall surface of the side wall 112. Alternatively, the fire-fighting module 30 and the pressure relief structure 40 can be arranged on any side wall 112, for example, on the side wall 112 on the side of the arrangement direction of the battery monomers 20 on the bottom wall 111 or on the side of the direction perpendicular to the arrangement direction of the battery monomers 20 on the bottom wall 111.

[0089] In this way, the fire-fighting module 30 and the pressure relief structure 40 can be arranged on the same side wall surface of the side wall 112 of the first box body 11 to achieve the effect of forming pressure relief from the side. At the same time, the assembly of the pressure relief structure 40 and the fire-fighting module 30 can reduce the influence on the structure of the second box body 12, so that the integrity of the second box body 12 is better, and thus the structural strength is better. Moreover, compared with the scheme of being arranged on the second box body 12, the fire-fighting module 30 arranged on the side wall 112 does not occupy the assembly space of the battery monomers 20 in the height direction of the battery monomers 20, so that the space utilization of the box body 10 in the height direction of the battery monomers 20 can be effectively improved.

[0090] Please refer to Figure 4 and Figure 6 In some embodiments, the battery device 100 includes a plurality of battery monomers 20 arranged in sequence along the first direction X; the battery device 100 further includes a battery management system 50 accommodated in the accommodation cavity 101; in the first direction X, the battery management system 50 is located on one side of the plurality of battery monomers 20 arranged in sequence, and the battery management system 50 is electrically connected with the battery monomers 20 and the fire-fighting module 30; wherein, in the first direction X, the fire-fighting module 30 is arranged on the side of the plurality of battery monomers 20 facing the battery management system 50.

[0091] The first direction X can refer to any direction parallel to the bottom wall 111. For example, the first direction X can be the length direction of the box body 10, the width direction of the box body 10, etc.

[0092] In the first direction X, the plurality of battery monomers 20 are arranged in sequence; it should be understood that the plurality of battery monomers 20 arranged in sequence can form at least one column of arrangement structure; when the number of columns of the arrangement structure formed by the arrangement is multiple, the multiple column arrangement structure can be distributed along the direction perpendicular to the first direction X.

[0093] The battery device 100 further comprises a battery management system 50; the battery management system 50 (BMS, Battery Management System) refers to an electronic system for monitoring and managing the performance of the battery device 100, ensuring its safe and efficient operation. The battery management system 50 is electrically connected to the battery monomers 20; the battery management system 50 has a battery monitoring function (voltage monitoring, current detection, temperature monitoring, etc.), and uses a sampling structure such as a sampling harness to electrically connect the internal battery monomers 20 to achieve the purpose of sampling monitoring. The battery management system 50 also has a charging control function, a discharging control function, a protection function (overvoltage protection, undervoltage protection, overtemperature protection, overcurrent protection, short circuit protection), etc.

[0094] The battery management system 50 is also electrically connected to the fire-fighting module 30, so that the battery management system 50 can monitor the state of the fire-fighting module 30, and the battery management system 50 can control the fire-fighting module 30 to release the fire-fighting medium.

[0095] In the first direction X, the battery management system 50 is located on one side of the plurality of battery monomers 20 arranged; in this way, the partitioned arrangement of the battery management system 50 and the battery monomers 20 can be realized, so as to improve the rationality of space layout and space utilization rate in the accommodating cavity 101.

[0096] At the same time, in the first direction X, the fire-fighting module 30 is arranged on the side of the plurality of battery monomers 20 facing the battery management system 50; in this way, the fire-fighting module 30, the pressure relief structure 40 and the battery management system 50 are all arranged on the same side of the plurality of arranged battery monomers 20.

[0097] In this way, the battery management system 50 is arranged on one side of the plurality of battery monomers 20 arranged, and the fire-fighting module 30 is arranged on the side of the plurality of battery monomers 20 facing the battery management system 50, so that the fire-fighting module 30 and the battery management system 50 are located on the same side of the plurality of battery monomers 20, and the spacing between the fire-fighting module 30 and the battery management system 50 is smaller, so that the wiring and installation process between the fire-fighting module 30 and the battery management system 50 can be simplified, and the maintenance cost and failure rate can be reduced.

[0098] Please refer to Figure 4 to Figure 6 In some embodiments, the spacing between the fire-fighting module 30 and the pressure relief structure 40 is m, and 15 cm≤m≤30 cm.

[0099] Wherein, the spacing m between the fire-fighting module 30 and the pressure relief structure 40 refers to the shortest distance between the fire-fighting module 30 and the pressure relief structure 40.

[0100] In the embodiment, the distance m between the fire-fighting module 30 and the pressure relief structure 40 is defined to be greater than or equal to 15 cm (expressed below using cm) and less than or equal to 30 cm; optionally, the distance m between the fire-fighting module 30 and the pressure relief structure 40 can be, but is not limited to, 15 cm, 16 cm, 17 cm, 18 cm, 19 cm, 20 cm, 21 cm, 22 cm, 23 cm, 24 cm, 25 cm, 26 cm, 27 cm, 28 cm, 29 cm, 30 cm, etc.

[0101] In this way, by setting the distance m between the fire-fighting module 30 and the pressure relief structure 40 to be greater than or equal to 15 cm and less than or equal to 30 cm, the fire-fighting module 30 can more efficiently extinguish the high-temperature flammable smoke to be discharged from the pressure relief structure 40 within this distance range, thereby effectively reducing the probability of a fire caused by the high-temperature flammable smoke being discharged to the outside of the box body 10 to produce an open flame.

[0102] Please refer to Figure 4 and Figure 8 In some embodiments, the battery device 100 further comprises a sensor assembly 60 electrically connected to the battery management system 50, and the sensor assembly 60 is configured to detect at least one of a voltage parameter, a current parameter, and a temperature parameter in the containing cavity 101 of the battery monomer 20.

[0103] The sensor assembly 60 refers to a combination of one or more sensors. For example, the sensor assembly 60 can include at least one of a sensor for detecting a voltage parameter, a sensor for detecting a current parameter, and a sensor for detecting a temperature parameter; in this way, at least one of the voltage parameter, the current parameter, and the temperature parameter in the containing cavity 101 of the battery monomer 20 can be detected by the sensor assembly 60 to determine whether a thermal runaway occurs.

[0104] Optionally, the sensor assembly 60 can be configured to detect the voltage parameter, the current parameter, and the temperature parameter in the containing cavity 101 of the battery monomer 20 in the following manner: the battery management system 50 collects the voltage parameter, the current parameter, and the temperature parameter of the battery monomer 20 through a sampling assembly, and sends the collected parameters to the sensor assembly 60 for detection and judgment; or, the sensor assembly 60 can be electrically connected to the battery monomer 20 to correspondingly collect the voltage parameter and the current parameter of the battery monomer 20, and a part of the sensor assembly 60 used to collect the temperature parameter can be arranged in the containing cavity or on the surface of the battery monomer 20 to collect the temperature parameter.

[0105] In some embodiments, the sensor assembly 60 can be integrated on the battery management system 50. For example, the sensor assembly 60 can include any number of sensors for detecting different parameters, and each sensor can be electrically connected to the battery management system 50 by wire or wirelessly, etc., to achieve multi-dimensional detection of thermal runaway inside the battery box 10.

[0106] In some embodiments, the plurality of sensors for detecting different parameters included in the sensor assembly 60 can also form a modular design, i.e., each sensor can be plugged into the battery management system 50 through a standardized interface, so that the number and types of sensors can be flexibly configured according to actual needs and extended for use.

[0107] The sampling assembly refers to a sampling structure for collecting parameter information such as voltage signals, current signals, and temperature signals of the battery monomer 20. Optionally, the sampling assembly includes but is not limited to a sampling harness, a sampling circuit board, and other sampling structures.

[0108] It should be understood that when the sensor assembly 60 detects at least one of the voltage parameter, the current parameter, and the temperature parameter and determines that thermal runaway occurs, the sensor assembly 60 can send an electrical signal to the battery management system 50 to enable the battery management system 50 to control the fire extinguishing module 30 to release the fire extinguishing medium and respond to the fire in a timely manner.

[0109] In this way, the sensor assembly 60 can detect at least one of the voltage parameter, the current parameter, and the temperature parameter in the containment cavity 101 of the battery monomer 20 to determine the thermal runaway condition, so that the battery management system 50 can control the fire extinguishing module 30 to release the fire extinguishing medium, thereby improving the accuracy of the thermal runaway condition determination and the timeliness of the fire extinguishing module 30. At the same time, when the thermal melting structure 31 fails, the normal operation of the fire extinguishing module 30 can be ensured, thereby improving the reliability of the fire extinguishing module 30.

[0110] Please refer to Figure 4 and Figure 8 In some embodiments, the sensor assembly 60 includes a temperature sensor 61 electrically connected to the battery management system 50, and the temperature sensor 61 is configured to detect the temperature parameter in the containment cavity 101. The battery management system 50 is configured to send a control signal to the fire extinguishing module 30 to release the fire extinguishing medium when the temperature sensor 61 determines that the temperature parameter is greater than a preset value.

[0111] The sensor assembly 60 includes a temperature sensor 61, and the temperature sensor 61 refers to a detection device for detecting the temperature parameter of a target object.

[0112] Optionally, the temperature sensor 61 can be, but is not limited to, a thermocouple or thermistor sensor, a semiconductor temperature sensor 61, a digital temperature sensor 61, etc.

[0113] In this embodiment, the temperature sensor 61 is used to detect the temperature parameter in the accommodation cavity 101; optionally, the temperature sensor 61 can be arranged at any position in the accommodation cavity 101 or on the surface of the battery monomer 20 to realize the detection of the ambient temperature in the accommodation cavity 101. Alternatively, the temperature sensor 61 can be integrated in the battery management system 50, for example, is electrically connected to the battery management system 50 through wired connection, wireless signal connection, etc. In this way, the temperature signal collected by the sampling assembly of the battery management system 50 can be transmitted to the temperature sensor 61 for real-time monitoring and processing.

[0114] In this way, the temperature sensor 61 can be used to judge the temperature parameter in the accommodation cavity 101, and when the temperature sensor 61 judges that the temperature parameter is greater than the preset value, it can be judged that thermal runaway occurs. In this way, the battery management system 50 can send a control signal to the fire extinguishing module 30 to make the fire extinguishing module 30 release the fire extinguishing medium to deal with the fire and the high-temperature flammable smoke of the spray valve.

[0115] Please refer to Figure 4 and Figure 8 In some embodiments, the sensor assembly 60 includes an electrical signal sensor 62, which is electrically connected to the battery management system 50. The electrical signal sensor 62 is used to detect the voltage parameter and the current parameter of the battery monomer 20; the battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when the electrical signal sensor 62 judges that the change of the voltage parameter and the current parameter reaches a preset value, so that the fire extinguishing module 30 releases the fire extinguishing medium.

[0116] The sensor assembly 60 includes an electrical signal sensor 62; the electrical signal sensor 62 refers to a detection device for detecting the voltage parameter and the current parameter of the battery monomer 20.

[0117] Optionally, the electrical signal sensor 62 includes, but is not limited to, a Hall effect sensor, a shunt resistance sensor, a voltage sensor, etc.

[0118] In this embodiment, the electrical signal sensor 62 is used to detect the voltage and current parameters of the battery monomer 20; alternatively, the electrical signal sensor 62 can be electrically connected to the battery monomer 20 using a conductor (e.g. a wire, a conductive sheet, etc.) to achieve direct measurement of the battery monomer 20. Alternatively, the electrical signal sensor 62 can be integrated into the battery management system 50, for example, electrically connected to the battery management system 50 through a wired connection, a wireless electrical signal connection, etc., so that the voltage and current signals collected by the sampling component of the battery management system 50 can be transmitted to the electrical signal sensor 62 for real-time monitoring and processing.

[0119] In this way, the electrical signal sensor 62 can be used to determine the voltage and current parameters of the battery monomer 20, and when the electrical signal sensor 62 determines that the voltage and current parameters reach the preset values, it can be determined that thermal runaway has occurred. In this way, the battery management system 50 can send a control signal to the fire-fighting module 30 to release the fire-fighting medium to deal with the fire and to perform fire-fighting treatment on the high-temperature flammable smoke of the spray valve.

[0120] Please refer to Figure 4 and Figure 8 In some embodiments, the battery device 100 further comprises a gas concentration detection device 70, which is electrically connected to the battery management system 50. The gas concentration detection device 70 is arranged in the accommodation cavity 101 and is used to detect the gas concentration in the accommodation cavity 101. The battery management system 50 is configured to send a control signal to the fire-fighting module 30 to release the fire-fighting medium when the gas concentration detection device 70 determines that the gas concentration is greater than a preset value.

[0121] The gas concentration detection device 70 refers to a detection device used to detect and measure the change in gas concentration in the accommodation cavity 101.

[0122] Alternatively, the gas concentration detection device 70 can be used to detect smoke, carbon monoxide and other gases generated by combustion, but is not limited thereto. In this way, when the battery monomer 20 in the accommodation cavity 101 experiences thermal runaway, the concentration of smoke, carbon monoxide and other gases generated by combustion will increase sharply; the gas concentration detection device 70 can monitor the concentration of the corresponding gas and convert it into a digital signal (e.g. through an analog-to-digital converter, etc.) and send it to the battery management system 50, so that the corresponding module of the battery management system 50 can analyze the digital signal and determine whether the measured gas concentration is excessive. If it is excessive, it can be determined that thermal runaway has occurred, and the battery management system 50 can control the fire-fighting module 30 to release the fire-fighting medium to deal with the thermal runaway.

[0123] The gas concentration detection device 70 can be arranged at any position in the accommodating cavity 101, for example, on any side wall of the box 10. In some embodiments, the gas concentration detection device 70 can be arranged close to the battery management system 50, so as to effectively simplify the layout of the lines between the gas concentration detection device 70 and the battery management system 50, improve the convenience of assembly, and reduce the probability of line failure.

[0124] In this way, the gas concentration detection device 70 can detect the flue gas generated in the box 10 due to combustion. When the gas concentration detection device 70 detects that the gas concentration is greater than the preset value, it can be judged that thermal runaway occurs. Therefore, the battery management system 50 can send a control signal to the fire extinguishing module 30 to make the fire extinguishing module 30 release the fire extinguishing medium to deal with the fire and perform fire extinguishing treatment on the high-temperature flammable smoke of the spray valve.

[0125] Please refer to Figure 4 and Figure 8 In some embodiments, the battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when at least one of the thermal melting structure 31, the sensor assembly 60, and the gas concentration detection device 70 is triggered, so that the fire extinguishing module 30 releases the fire extinguishing medium.

[0126] In this embodiment, at least one of the thermal melting structure 31, the sensor assembly 60, and the gas concentration detection device 70 is triggered to determine that thermal runaway occurs. Therefore, the influence of failure of any structure triggering the fire extinguishing module 30 on the start of the fire extinguishing module 30 can be effectively reduced, and the reliability of the fire extinguishing module 30 can be improved.

[0127] When at least one of the thermal melting structure 31, the sensor assembly 60, and the gas concentration detection device 70 is triggered, the battery management system 50 can control the fire extinguishing module 30 to perform the release operation. Therefore, when any one of the thermal melting structure 31, the sensor assembly 60, and the gas concentration detection device 70 is preferentially triggered, the fire extinguishing module 30 can be started and release the fire extinguishing medium. Therefore, the timeliness of thermal runaway judgment can be effectively improved, and the response speed of the fire extinguishing module 30 can be improved, so as to reduce the influence of thermal runaway.

[0128] In the following, the battery device 100 provided by the present application will be further introduced in combination with specific embodiments.

[0129] Please refer to Figure 2 to Figure 8 In this embodiment, the battery device 100 includes a battery monomer 20, a box 10, a battery management system 50, and a fire extinguishing module 30. The box 10 is internally provided with an accommodating cavity 101, the battery monomer 20 is accommodated in the accommodating cavity 101, and the box 10 is provided with a pressure relief structure 40.

[0130] The box body 10 comprises a first box body 11 and a second box body 12. The first box body 11 comprises a bottom wall 111 and a side wall 112. The battery monomer 20 is arranged on the bottom wall 111. The side wall 112 is arranged at the outer edge of the bottom wall 111. The second box body 12 is connected to the end of the side wall 112 away from the bottom wall 111. The second box body 12, the bottom wall 111 and the side wall 112 jointly form a containing cavity 101.

[0131] The number of the battery monomers 20 is multiple. The multiple battery monomers 20 are arranged in sequence along the first direction X. In the first direction X, the battery management system 50 is located at one side of the multiple battery monomers 20 arranged in sequence. The battery management system 50 is electrically connected to the battery monomers 20 and the fire extinguishing module 30. In the first direction X, the fire extinguishing module 30 and the pressure relief structure 40 are arranged on the same side wall 112 at the side of the multiple battery monomers 20 facing the battery management system 50.

[0132] The battery device 100 further comprises a gas concentration detection device 70 and a sensor assembly 60. The gas concentration detection device 70 is electrically connected to the battery management system 50. The gas concentration detection device 70 is arranged in the containing cavity 101 and is used for detecting the gas concentration in the containing cavity 101. The battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when the gas concentration detection device 70 determines that the gas concentration is greater than a preset value, so that the fire extinguishing module 30 releases the fire extinguishing medium.

[0133] The sensor assembly 60 comprises a temperature sensor 61 and an electrical signal sensor 62. The temperature sensor 61 is electrically connected to the battery management system 50. The temperature sensor 61 is used for detecting a temperature parameter in the containing cavity 101. The battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when the temperature sensor 61 determines that the temperature parameter is greater than a preset value, so that the fire extinguishing module 30 releases the fire extinguishing medium. The electrical signal sensor 62 is electrically connected to the battery management system 50. The electrical signal sensor 62 is used for detecting a voltage parameter and a current parameter of the battery monomer 20. The battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when the electrical signal sensor 62 determines that the change of the voltage parameter and the current parameter reaches a preset value, so that the fire extinguishing module 30 releases the fire extinguishing medium.

[0134] The battery management system 50 is configured to send a control signal to the fire extinguishing module 30 when at least one of the heat melting structure 31, the temperature sensor 61, the electrical signal sensor 62 and the gas concentration detection device 70 is triggered, so that the fire extinguishing module 30 releases the fire extinguishing medium.

[0135] Please refer to Figure 1 to Figure 4 The application further provides a power utilization device comprising the battery device 100 as described above, and the battery device 100 is used for providing electric energy.

[0136] The power utilization device provided by the embodiments of the present application, for example, the vehicle 1000 described above, comprises the battery device 100 described above, so that the reliability of the power utilization device is better.

[0137] Please refer to Figure 1 、 Figure 4 and Figure 8 In some embodiments, the power utilization device further comprises a display device (not shown in the figure), the battery device 100 comprises a battery management system 50, a fire-fighting module 30, a sensor assembly 60 and a gas concentration detection device 70, the fire-fighting module 30, the sensor assembly 60 and the gas concentration detection device 70 are electrically connected to the battery management system 50, and the display device is electrically connected to the battery management system 50.

[0138] The display device refers to a device for converting digital or analog signals into visual images, for example, a liquid crystal screen, a display panel and the like.

[0139] The display device is electrically connected to the battery management system 50, so that the battery management system 50 can output an electric signal to the display device, so that the display device can convert the states of the fire-fighting module 30, the sensor assembly 60 and the gas concentration detection device 70 and the like into display information (for example, a chart, a text, an alarm information and the like), so as to facilitate the user to observe, and improve the readability and the ease of use of the information.

[0140] The above only is the preferred embodiment of the present application, and does not limit the present application, any modification, equivalent replacement and improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include Battery cell; The housing has an internal cavity into which the individual battery cells are housed; the housing also has a pressure relief structure. A fire-fighting module is located within the receiving cavity and is mounted on the housing. The fire-fighting module is equipped with a heat-fusion structure and is configured to release fire-fighting medium after the heat-fusion structure is triggered. The fire-fighting module and the pressure relief structure are located on the same side wall of the housing.

2. The battery device according to claim 1, characterized in that: The enclosure includes a first enclosure and a second enclosure. The first enclosure includes a bottom wall and a side wall. The battery cell is disposed on the bottom wall. The side wall is arranged around the outer edge of the bottom wall. The second enclosure is connected to the side wall at one end away from the bottom wall. The second enclosure, the bottom wall, and the side wall together enclose the cavity. The fire-fighting module and the pressure relief structure are disposed on the same side wall surface of the side wall.

3. The battery device according to claim 2, characterized in that: The battery device includes multiple battery cells, which are arranged sequentially along a first direction. The battery device further includes a battery management system housed within the receiving cavity; in the first direction, the battery management system is located on one side of the plurality of battery cells arranged in a row, and the battery management system is electrically connected to the battery cells and the fire-fighting module; In the first direction, the fire-fighting module is located on the side of the plurality of battery cells facing the battery management system.

4. The battery device according to any one of claims 1 to 3, characterized in that: The distance between the fire protection module and the pressure relief structure is m, where 15cm≤m≤30cm.

5. The battery device according to claim 3, characterized in that: The battery device further includes a sensor assembly electrically connected to the battery management system, the sensor assembly being used to detect at least one of the voltage parameter, current parameter, and temperature parameter within the housing cavity of the battery cell.

6. The battery device according to claim 5, characterized in that: The sensor assembly includes a temperature sensor electrically connected to the battery management system. The temperature sensor is used to detect the temperature parameter inside the containment cavity. The battery management system is configured to send a control signal to the fire protection module when the temperature sensor determines that the temperature parameter is greater than a preset value, so that the fire protection module releases the fire protection medium.

7. The battery device according to claim 5, characterized in that: The sensor assembly includes an electrical signal sensor electrically connected to the battery management system. The electrical signal sensor is used to detect the voltage and current parameters of the individual battery cells. The battery management system is configured to send a control signal to the fire protection module when the electrical signal sensor determines that the changes in the voltage and current parameters reach preset values, so that the fire protection module releases the fire protection medium.

8. The battery device according to any one of claims 5 to 7, characterized in that: The battery device also includes a gas concentration detection device, which is electrically connected to the battery management system. The gas concentration detection device is disposed in the containment cavity and is used to detect the gas concentration in the containment cavity. The battery management system is configured to send a control signal to the fire protection module when the gas concentration detection device determines that the gas concentration is greater than a preset value, so that the fire protection module releases the fire protection medium.

9. The battery device according to claim 8, characterized in that: The battery management system is configured to send a control signal to the fire-fighting module when at least one of the hot melt structure, the sensor assembly, and the gas concentration detection device is triggered, so that the fire-fighting module releases the fire-fighting medium.

10. An electrical device, characterized in that: Includes the battery device as described in any one of claims 1 to 9.

11. The electrical appliance according to claim 10, characterized in that: The electrical device also includes a display device, and the battery device includes a battery management system, a fire protection module, a sensor assembly, and a gas concentration detection device. The fire protection module, the sensor assembly, and the gas concentration detection device are electrically connected to the battery management system, and the display device is electrically connected to the battery management system.

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