Battery devices, energy storage devices and power consumption devices

Abstract

The present application is applicable to the field of batteries, and proposes a battery device, an energy storage device, and an electrical device, wherein the battery device includes a housing; a battery cell assembly, which is contained in the housing and includes a plurality of battery cells arranged in sequence; a profiling member, which is contained in the housing, and the profiling member is arranged with the battery cell assembly and is used to replace one or more battery cells, and the profiling member includes a housing with an opening, a partition structure, and a plurality of fire-fighting components, wherein the partition structure divides the space in the housing into a plurality of receiving slots, and the fire-fighting components contain a fire-extinguishing medium; a fire-fighting control device, which is contained in the housing, and the fire-fighting control device includes an electrically connected sensor assembly and a controller, wherein the sensor assembly is used to collect environmental information in the housing, and the controller is used to control the fire-fighting components to release the fire-fighting medium according to the environmental information. The battery device provided by the embodiment of the present application solves the problem of structural changes and cost increases caused by capacity changes, and has high reliability in use.

Description

Technical Field

[0001] The present application relates to the field of batteries, and in particular to a battery device, an energy storage device and an electrical device. Background Art

[0002] Different electrical devices may require different battery capacities, and the number of battery cells in the battery will change with the demand for battery capacity, which requires changes to the battery structure and increases the manufacturing cost of the battery.

[0003] At the same time, in the development of battery technology, how to improve the reliability of battery use is an important research direction in battery technology. Summary of the invention

[0004] In view of this, the embodiments of the present application provide a battery device, an energy storage device, and an electrical device, which solve the problems of structural changes and cost increases of the battery device caused by capacity changes, and improve the reliability of the battery device.

[0005] An embodiment of the first aspect of the present application proposes a battery device, comprising: a box body; a battery cell assembly, accommodated in the box body, the battery cell assembly comprising a plurality of battery cells arranged in sequence; a contour piece, accommodated in the box body, the contour piece and the battery cell assembly are arranged in sequence and are used to replace one or more battery cells, the contour piece comprising an outer shell with an opening, a partition structure arranged in the outer shell and a plurality of fire-fighting components, the partition structure divides the space in the outer shell into a plurality of accommodating slots, the opening is connected to the plurality of accommodating slots, the plurality of fire-fighting components are respectively arranged in the corresponding accommodating slots, and the fire-fighting components contain a fire-extinguishing medium; a fire-fighting control device, accommodated in the box body, the fire-fighting control device comprising an electrically connected sensor assembly and a controller, the sensor assembly being used to collect environmental information in the box body, and the controller being used to control the fire-fighting component to release the fire-fighting medium according to the environmental information.

[0006] The battery device provided in the embodiment of the present application includes a profiling member, the shell of the profiling member can replace the battery cell and provide an installation basis for the fire fighting component. At the same time, by setting a partition structure in the shell of the profiling member, it is convenient to arrange multiple fire fighting components in the profiling member, which is conducive to achieving a better fire extinguishing effect. In this way, when the capacity of the battery device changes, the profiling member can replace the battery cell and occupy a certain space in the box, that is, the profiling member occupies the vacant installation position formed by the reduction in the number of battery cells, reducing the need to change the box size and change the arrangement of the battery cells, solving the problem of structural changes of the battery device caused by capacity changes, saving the manufacturing cost of the battery device, and improving production efficiency. At the same time, the battery device includes a fire control device, the fire control device can collect environmental information in the box and the controller can control the profiling member to release the fire fighting medium according to the environmental information. Therefore, the battery device provided in the embodiment of the present application can extinguish or delay the fire by using the profiling member and the fire control device, reducing the impact of thermal runaway of the battery cell, preventing or delaying the spread of thermal runaway between battery cells, blocking or delaying the thermal runaway process, and improving the reliability of the battery device.

[0007] In some embodiments, the controller is further used to determine the number of fire-fighting components that need to be opened based on environmental information and control the opening of a corresponding number of fire-fighting components.

[0008] By adopting the above technical solution, the controller can control the opening of one or more fire-fighting components according to environmental information, so that the number of fire-fighting components opened can adapt to the specific fire-fighting needs; the contoured parts can release the fire-fighting medium multiple times, which is conducive to curbing the progress of thermal runaway.

[0009] In some embodiments, the environmental information includes temperature information and air pressure information, the sensor assembly includes a temperature sensor, and the temperature sensor is used to collect temperature information inside the box; the controller is used to control the opening of one or more fire-fighting components according to the temperature information.

[0010] By adopting the above technical solution, the controller can control the opening of the fire-fighting components according to the temperature information, achieve the effect of precise fire extinguishing, and effectively curb the spread of thermal runaway.

[0011] In some embodiments, the environmental information also includes air pressure information, the sensor assembly also includes an air pressure sensor, the air pressure sensor is used to collect air pressure information in the box, and the controller is used to control the opening of one or more fire-fighting components based on at least one of the temperature information and the air pressure information.

[0012] By adopting the above technical solution, the controller can control the opening of the fire-fighting components according to temperature information and / or air pressure information, thereby achieving the effect of precise fire extinguishing.

[0013] In some embodiments, the controller is also used to calculate the temperature change rate based on the temperature information and the air pressure change rate based on the air pressure information, and to determine the number of fire-fighting components that need to be opened based on at least one of the temperature information, air pressure information, the temperature change rate and the air pressure change rate.

[0014] By adopting the above technical solution, the controller can judge the thermal runaway state of the battery cell and determine the number of fire-fighting components that need to be opened through the changes in temperature and air pressure in the box, and realize timely and effective cooling and fire-fighting functions through the cooperation of the controller and the contour parts.

[0015] In some embodiments, multiple battery cells in a battery cell assembly are arranged along a first direction, and the contour piece and the battery cells are arranged along the first direction; the partition structure includes multiple first reinforcing ribs and multiple second reinforcing ribs, the first reinforcing ribs extend along the first direction, the extension direction of the second reinforcing ribs intersects with the first reinforcing ribs, and the first direction is the arrangement direction of the battery cell assembly and the contour piece.

[0016] By adopting the above technical solution, the shell in the shaped part abuts against the battery cell, and the first reinforcing ribs and the second reinforcing ribs in the shell can enhance the structural strength of the shaped part, improve the supporting effect of the shaped part on the battery cell, and reduce the risk of excessive expansion and deformation of the battery cell.

[0017] In some embodiments, the box body includes an upper box body and a lower box body, and the upper box body and the lower box body are buckled with each other; the opening of the shell faces at least one of the upper box body and the lower box body.

[0018] By adopting the above technical solution, the opening of the shell can be flexibly arranged so that the fire-fighting medium released by the fire-fighting component can smoothly enter the accommodating space of the box body, so as to utilize the fire-fighting medium to extinguish the fire.

[0019] In some embodiments, the box body includes a side beam extending along a first direction and an end beam extending along a second direction, the end beam is connected to the side beam, and the second direction intersects with the first direction; wherein, the profiling member is arranged on a side of the battery cell assembly close to the end beam, the profiling member is arranged opposite to the end beam, and the opening of the shell faces the end beam, or, the profiling member is arranged opposite to the side beam, and the opening of the shell faces the side beam.

[0020] By adopting the above technical solution, the opening of the shell faces the end beam, and the fire-fighting medium released by the fire-fighting component can smoothly enter the accommodating space of the box through the opening; the side of the shell facing the battery cell assembly can abut against the battery cell to play a supporting role.

[0021] In some embodiments, a pressure relief mechanism is provided on the battery cell, and the opening of the shell and the pressure relief mechanism face the same side of the box body.

[0022] By adopting the above technical solution, the fire-fighting medium released by the fire-fighting component can smoothly enter the accommodating space of the box through the opening and directly mix with the emissions, so as to achieve the effect of cooling and extinguishing the fire.

[0023] In some embodiments, the fire control device is fixed to the contoured member.

[0024] By adopting the above technical solution, it is convenient to electrically connect the fire control device to the contour piece, and the installation method of the fire control device is simple and convenient.

[0025] In some embodiments, the contoured member has the same shape as the battery cell.

[0026] By adopting the above technical solution, it is convenient to install the profiling member on the vacant installation position, and after the profiling member is installed, it can support the adjacent battery cells and suppress the expansion deformation of the adjacent battery cells.

[0027] In some embodiments, multiple battery cells in a battery cell assembly are arranged along a first direction; along the first direction, the ratio of the size of the contour piece to the size of the battery cell ranges from 0.9N to 1.1N, N is a positive integer and N is less than 5; and / or, along the second direction, the ratio of the size of the contour piece to the size of the battery cell ranges from 0.9M to 1.1M, M is a positive integer and M is less than 5, and the second direction intersects with the first direction.

[0028] By adopting the above technical solution, the contoured part can replace one or more battery cells and occupy the vacant installation position.

[0029] An embodiment of the second aspect of the present application provides an energy storage device, comprising a plurality of battery devices as in the first aspect, the battery devices being used to store or provide electrical energy.

[0030] An embodiment of the third aspect of the present application provides an electrical device, including a battery device as in the first aspect or an energy storage device as in the second aspect, wherein the battery device is used to store or provide electrical energy.

[0031] The above description is only an overview of the technical solution of the present application. In order to more clearly understand the technical means of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or conventional technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0033] Figure 1 is a schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0034] Figure 2 is an exploded schematic diagram of a battery device provided in some embodiments of the present application;

[0035] Figure 3 is an exploded schematic diagram of a battery cell provided in some embodiments of the present application;

[0036] Figure 4 is a schematic diagram of the structure of a battery device provided in some embodiments of the present application;

[0037] Figure 5 It is a schematic diagram of the structure of the profiling member and the fire control device provided in some embodiments of the present application;

[0038] Figure 6 yes Figure 5 A partial enlarged view of the middle A part;

[0039] Figure 7 yes Figure 5 A front view of the profiled member and the fire control device shown;

[0040] Figure 8 It is a module schematic diagram of a profiling member, a fire control device and a battery management system provided in some embodiments of the present application;

[0041] Fig. 9 It is a schematic diagram of the structure of the profiling member and the fire control device provided in other embodiments of the present application.

[0042] The meanings of the marks in the figure are:

[0043] 1000, vehicle; 100, battery device; 200, motor; 300, vehicle controller;

[0044] 10. Box body; 11. Upper box body; 12. Lower box body; 121. Side beam; 122. End beam; 123. Cross beam;

[0045] 20. Battery cell assembly; 21. Battery cell; 211. Housing; 212. End cover; 213. Electrode assembly; 214. Electrode terminal; 215. Pressure relief mechanism;

[0046] 30. profiling member; 31. shell; 311. opening; 312. receiving groove; 32. fire-fighting component; 321. tank body; 322. cover plate; 33. partition structure; 331. first reinforcing rib; 332. second reinforcing rib;

[0047] 40. Fire control device; 41. Sensor assembly; 411. Temperature sensor; 412. Air pressure sensor; 42. Controller;

[0048] 50. Battery management system. DETAILED DESCRIPTION

[0049] The following embodiments of the technical solution of the present application are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present application, and are therefore only used as examples, and cannot be used to limit the scope of protection of the present application.

[0050] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by technicians in the technical field to which this application belongs; the terms used herein are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims, book and the above-mentioned figure descriptions of this application and any variations thereof are intended to cover non-exclusive inclusions.

[0051] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise clearly and specifically defined.

[0052] Reference to "embodiments" herein means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein may be combined with other embodiments.

[0053] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, indicating that there may be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this article generally indicates that the associated objects before and after are in an "or" relationship.

[0054] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two). Similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0055] In the description of the embodiments of the present application, the orientations or positional relationships indicated by technical terms such as "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "vertical", "horizontal", "top", "bottom", "inside" and "outside" are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the embodiments of the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the embodiments of the present application.

[0056] In the description of the embodiments of the present application, unless otherwise clearly specified and limited, technical terms such as "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal connection of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0057] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0058] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0059] At present, from the perspective of market development, the application of power battery devices is becoming more and more extensive. Power battery devices are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of the application field of power battery devices, the market demand is also constantly expanding.

[0060] Different electrical devices, especially different models of the same device, may require different battery capacities, and the number of battery cells in the battery will change as the demand for battery capacity changes, which requires the battery structure to be changed accordingly. In particular, when the number of battery cells is reduced, there will be vacant installation positions in the box, and the battery cells next to the vacant installation positions may expand excessively due to lack of constraints; then, the size of the box needs to be changed, and / or the arrangement of the battery cells needs to be changed. Therefore, the change in battery capacity increases the design and manufacturing costs of the battery.

[0061] At the same time, in the development of battery technology, how to improve the reliability of battery use is an important research direction in battery technology. The battery includes a box and multiple battery cells arranged in the box. If the battery cells have thermal runaway, it may cause the battery to burn, affecting the reliability of the battery.

[0062] In view of this, an embodiment of the present application provides a battery device, including a box, a battery cell assembly accommodated in the box, a contour piece and a fire control device, wherein the battery cell assembly includes a plurality of battery cells arranged in sequence; the contour piece is arranged with the battery cell assembly and is used to replace one or more battery cells, and the contour piece contains a fire extinguishing medium; the fire control device includes an electrically connected sensor assembly and a controller, the sensor assembly is used to collect environmental information in the box, and the controller is used to control the contour piece to release the fire extinguishing medium based on the environmental information.

[0063] In the battery device provided by the above embodiment, the profiling part can replace the battery cell. The profiling part occupies a certain space in the box body, which solves the problem of changing the structure of the battery device due to capacity change, reduces costs, and improves production efficiency; at the same time, the profiling part contains a fire extinguishing medium, and the fire control device can collect environmental information in the box body and control the profiling part to release the fire extinguishing medium based on the environmental information. In this way, the fire control device can monitor the thermal runaway state of the battery cell by collecting environmental information in the box body, and control the profiling part to release the fire extinguishing medium after the battery cell thermal runaway. Therefore, the above battery device can reduce the impact of thermal runaway of the battery cell, prevent or delay the spread of thermal runaway between battery cells, block or delay the thermal runaway process, and improve the reliability of the battery device.

[0064] The battery device disclosed in the embodiments of the present application can be used in an electrical device that uses the battery device as a power source or various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, and the like. Among them, the electric toy can include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, and an electric airplane toy, and the like, and the spacecraft can include an airplane, a rocket, a space shuttle, and a spacecraft, and the like.

[0065] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0066] refer to Figure 1 , Figure 1A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a vehicle controller 300 and a motor 200, and the vehicle controller 300 is used to control the battery device 100 to power the motor 200, for example, for the starting, navigation and working power requirements of the vehicle 1000 during driving.

[0067] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0068] refer to Figure 2 , Figure 2 Schematic diagram of an exploded structure of a battery device 100 provided in some embodiments of the present application. The battery device (Battery Apparatus) mentioned in the embodiments of the present application may include one or more battery cell assemblies 20 for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include multiple battery cells, and the multiple battery cells are connected in series, in parallel, or in mixed series through a busbar component.

[0069] In some embodiments, the battery cell assembly 20 is generally formed by arranging a plurality of battery cells; as an example, the battery cell assembly 20 may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0070] In some embodiments, the battery device 100 may be a battery pack, which includes a case 10 and one or more battery cell assemblies 20 , wherein the battery cell assemblies 20 are accommodated in the case 10 .

[0071] As an example, the battery cell assembly 20 may be a battery module, and the battery cell assembly 20 may be accommodated in the box body by fixing the battery module in the box body 10 .

[0072] As an example, the battery cell assembly 20 may also be housed in the case 10 by directly fixing a plurality of battery cells.

[0073] As an example, the box body 10 may include an upper box body 11 and a lower box body 12. The upper box body 11 and the lower box body 12 are buckled together to form a closed accommodating cavity inside the box body 10 to accommodate the battery cell assembly 20. The closed here means covered or closed, which can be sealed or unsealed.

[0074] As an example, the box body 10 may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed accommodation cavity is formed inside the box body 10 to accommodate the battery cell assembly 20.

[0075] As an example, the box 10 may be a part of the chassis structure of the vehicle 1000. For example, the roof of the box 10 may become at least a part of the floor of the vehicle 1000, or the frame of the box 10 may become at least a part of the cross beam and longitudinal beam of the vehicle 1000.

[0076] In some embodiments, the battery device 100 refers to an energy storage device, which includes a box 10, at least one side of which is provided with a door. The energy storage device includes an energy storage container, an energy storage cabinet, and the like.

[0077] Please refer to Figure 3 The battery cell 21 is the smallest unit constituting the battery device, and the battery cell 21 includes a housing 211, an end cover 212, an electrode assembly 213 and other functional components.

[0078] The end cap 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cap 212 can be adapted to the shape of the shell 211 to match the shell 211. Optionally, the end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that the end cap 212 is not easily deformed when squeezed and collided, so that the battery cell 21 can have a higher structural strength and the reliability of use can also be improved. Functional components such as electrode terminals 214 and pressure relief mechanisms 215 can be provided on the end cap 212. The electrode terminal 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting electrical energy of the battery cell 21. In some embodiments, the pressure relief mechanism 215 is used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold. The material of the end cap 212 can also be a variety of materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiments of the present application do not impose special restrictions on this. In some embodiments, an insulating member may be provided inside the end cap 212, and the insulating member may be used to isolate the electrical reinforcing bar 3211 in the housing 211 from the end cap 212 to reduce the risk of short circuit. For example, the insulating member may be plastic, rubber, or the like.

[0079] The shell 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, the electrolyte and other components. The shell 211 and the end cap 212 can be independent components, and an opening can be set on the shell 211, and the internal environment of the battery cell 21 is formed by covering the opening with the end cap 212 at the opening. Without limitation, the end cap 212 and the shell 211 can also be integrated. Specifically, the end cap 212 and the shell 211 can form a common connection surface before other components are put into the shell, and when it is necessary to encapsulate the interior of the shell 211, the end cap 212 covers the shell 211. The shell 211 can be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The shell 211 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and the embodiment of the present application does not impose any special restrictions on this.

[0080] The electrode assembly 213 is a component in the battery cell 21 where electrochemical reactions occur. One or more electrode assemblies 213 may be included in the housing 211. The electrode assembly 213 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 parts of the positive and negative electrode sheets with active materials constitute the main body of the electrode assembly 213, and the parts of the positive and negative electrode sheets without active materials each constitute a tab. The positive tab and the negative tab may be located together at one end of the main body or respectively at both ends of the main body. During the charge and discharge process of the battery device 100, the positive active material and the negative active material react with the electrolyte, and the tabs are connected to the electrode terminals 214 to form a current loop.

[0081] In some embodiments, a pressure relief mechanism 215 is provided on one side of the battery cell 21. The pressure relief mechanism 215 refers to an element or component that is actuated to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The threshold design varies according to different design requirements. The threshold may depend on one or more materials of the positive electrode plate, the negative electrode plate, the electrolyte and the separator in the battery cell 21. The internal pressure of the battery cell 21 is the pressure inside the housing 211. The pressure relief mechanism 215 can take the form of an explosion-proof valve, an air valve, a pressure relief valve or a safety valve, and can specifically adopt a pressure-sensitive element or structure, that is, when the internal pressure of the battery cell 21 reaches a predetermined threshold, the pressure relief mechanism 215 performs an action or a weak portion provided in the pressure relief mechanism 215 ruptures, thereby forming an opening or channel for internal pressure relief.

[0082] The "actuation" mentioned in this application means that the pressure relief mechanism 215 is in motion or activated to a certain state, so that the internal pressure of the battery cell 21 can be released. The action produced by the pressure relief mechanism 215 may include but is not limited to: at least a part of the pressure relief mechanism 215 is broken, shattered, torn or opened, etc. When the pressure relief mechanism 215 is actuated, the high-temperature and high-pressure substances inside the battery cell 21 will be discharged from the actuated part as emissions. In this way, the battery cell 21 can be depressurized under controllable pressure, thereby avoiding potential more serious accidents. The emissions from the battery cell 21 mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative pole pieces, fragments of separators, high-temperature and high-pressure gases produced by the reaction, flames, and the like.

[0083] First, refer to Figures 4 to 7 The embodiment of the present application provides a battery device 100, including a box body 10 and a battery cell assembly 20, a profiling member 30 and a fire control device 40 contained in the box body 10. The battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence; the profiling member 30 is arranged in an arrangement with the battery cell assembly 20 and can replace one or more battery cells 21; the profiling member 30 includes a shell 31 with an opening 311, a partition structure 33 disposed in the shell 31 and a plurality of fire fighting components 32; the partition structure 33 divides the space in the shell 31 into a plurality of receiving slots 312; the opening 311 is connected to the plurality of receiving slots 312; the plurality of fire fighting components 32 are respectively disposed in the corresponding receiving slots 312; the fire fighting components 32 contain fire extinguishing medium; the fire fighting control device 40 includes an electrically connected sensor assembly 41 and a controller 42; the sensor assembly 41 is used to collect environmental information in the box body 10; the controller 42 is electrically connected to the fire fighting component 32; the controller 42 is used to control the fire fighting component 32 to release the fire fighting medium according to the environmental information.

[0084] The box 10 refers to a structure in the battery device 100 for providing a fixed foundation for the battery cell assembly 20. The box 10 may be prismatic, cylindrical or other shapes; the material of the box 10 may include metal, plastic or other materials.

[0085] The battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. Figure 4 As shown, in some embodiments, the battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence along a first direction X, and the first direction may be the length direction of the box body 10. In other embodiments, the first direction X may also be the width direction of the box body 10, or the first direction X may be a direction intersecting both the length direction and the width direction of the box body 10.

[0086] The number of battery cell assemblies 20 may be one or more. When the number of battery cell assemblies 20 is multiple, the multiple battery cell assemblies 20 may be arranged in a row along a first direction X, and the multiple battery cell assemblies 20 may also be arranged in multiple columns along a second direction Y intersecting the first direction X, so that the battery cells 21 are arranged in an array.

[0087] The shape of the battery cell 21 may be a cuboid, a cylinder or other shapes; in the battery cell assembly 20, the number of the battery cells 21 may be two, or three or more.

[0088] In the battery device, the number of the profiling member 30 can be one or more. The profiling member 30 is arranged in an array with the battery cells 21, wherein the profiling member 30 can be arranged on the same side of a plurality of battery cells 21, or between any two adjacent battery cells 21. The number of the battery cell assemblies 20 is one or more groups, and when the number of the battery cell assemblies 20 is more than one group, at least one group of the battery cell assemblies 20 is stacked and arranged with the profiling member 30.

[0089] The shaped member 30 can replace the battery cell 21 . When the capacity of the battery device 100 decreases, the shaped member 30 can occupy the vacant installation position formed by the reduction in the number of battery cells 21 . In addition, the shaped member 30 can play a role in restricting the expansion of the battery cells 21 on its adjacent side.

[0090] For example, for battery devices 100 of different capacities, a battery device 100 of larger capacity is provided with Q battery cells 21 arranged along the first direction X in the box 10, and a battery device 100 of smaller capacity is provided with Q battery cells 21 arranged along the first direction X in the box 10, where P is greater than Q. One profiling member 30 can be used to replace only one battery cell 21, in which case the outer dimensions of the profiling member 30 are similar to those of one battery cell 21, and the number of profiling members 30 is the difference between P and Q. One profiling member 30 can also be used to replace two or more battery cells 21, in which case the outer dimensions of the profiling member 30 can be an integer multiple of the outer dimensions of the battery cell 21, or the outer dimensions of the profiling member 30 can also be close to an integer multiple of the outer dimensions of the battery cell 21.

[0091] The shape of the profiling member 30 can be a cuboid, prism, cylinder or other shapes, and the shape of the profiling member 30 can also be set according to the shape of the battery cell 21. Since the profiling member 30 replaces the battery cell 21 and occupies the vacant installation position, the profiling member 30 may not provide electrical energy, and the profiling member may be a dummy battery cell or a dummy battery core, and there is no need to set an electrode assembly inside it, nor is it necessary to be electrically connected to the battery cell 21 with charge and discharge capabilities.

[0092] The shaped member 30 contains a fire extinguishing medium, which is a medium that can achieve a fire extinguishing effect. The fire extinguishing medium can extinguish a fire in a variety of ways, for example, the fire extinguishing medium is used to isolate oxygen or a fire source, the fire extinguishing medium can reduce the temperature inside the box 10, and the fire extinguishing medium can also increase the pressure inside the box 10, so that the pressure relief mechanism on the box 10 opens in advance.

[0093] The fire extinguishing medium can be a non-conductive and non-combustible gas, liquid, solid, foam or powder, and the fire extinguishing medium does not react with the internal material of the battery device. When the fire extinguishing medium is a gas, the fire extinguishing medium can be an inert gas such as CO2 (Carbondioxide), SF6 (Sulfur hexafluoride) or N2 (Nitrogen). When the fire extinguishing medium is a liquid, the fire extinguishing medium can be a low-melting-point liquid that forms a gas after a phase change or chemical reaction, such as liquid perfluorohexanone, hexafluoropropane or heptafluoropropane. When the fire extinguishing medium is a solid, the fire extinguishing medium can be a solid medium that forms a gas after a phase change, such as dry ice. The fire extinguishing medium can also produce gas after a chemical reaction. For example, when the fire extinguishing medium is an aerosol solid (such as potassium nitrate, sodium nitrate, etc.), a large amount of inert gas is produced after a chemical reaction to consume free oxygen and dilute the concentration of thermal runaway emissions of the battery cell 21.

[0094] Please refer to Figures 5 to 7 In some embodiments, the contoured member 30 includes a shell 31 having an opening 311 and a fire-fighting component 32 contained in the shell 31, and the fire-fighting medium is contained in the fire-fighting component 32; a controller 42 is electrically connected to the fire-fighting component 32, and the controller 42 is used to control the fire-fighting component 32 to open according to environmental information, so that the fire-fighting component 32 releases the fire-fighting medium through the opening 311.

[0095] The profiling member 30 includes a shell 31, which is stacked with the battery cell assembly 20. The outer shape of the shell 31 can be similar to the outer shape of the battery cell 21, and a space for accommodating the firefighting component 32 is formed in the shell 31. The shell 31 is provided with an opening 311, and the number of the openings 311 can be one or more. When there are multiple openings 311, the multiple openings 311 can be provided on one side or different sides of the shell 31.

[0096] The fire fighting component 32 is a component storing a fire extinguishing medium. The fire fighting component 32 can release the fire extinguishing medium when it is opened. The number of the fire fighting components 32 can be one or more. Optionally, the fire fighting component 32 is a fire fighting tank. The fire fighting component 32 includes a tank body 321 and a cover plate 322. The cover plate 322 is covered on the tank body 321. When the fire fighting component 32 is opened, the cover plate 322 opens to allow the fire fighting medium to flow out. In other embodiments, the fire fighting component 32 can also be in other shapes such as a box.

[0097] The controller 42 is electrically connected to the fire fighting component 32 , and the controller 42 can send a control signal to the fire fighting component 32 to turn on the fire fighting component 32 ; optionally, the controller 42 can also control the fire fighting component 32 to turn off.

[0098] The contoured member 30 further includes a partition structure 33 disposed in the outer shell 31 , which partitions the space in the outer shell 31 into a plurality of receiving grooves 312 , and the opening 311 is connected to the plurality of receiving grooves 312 ; the plurality of fire-fighting components 32 are respectively disposed in the corresponding receiving grooves 312 .

[0099] The partition structure 33 can be integrally formed with the housing 31, or can be fixedly connected by welding or other methods. The partition structure 33 can include one or more structures such as reinforcing ribs and baffles that can separate spaces. The partition structure 33 divides the space in the housing 31 into a plurality of receiving grooves 312. It can be understood that the notches of the receiving grooves 312 are arranged toward the opening 311 of the housing 31.

[0100] There are multiple fire fighting components 32. Optionally, multiple fire fighting components 32 are arranged in a one-to-one correspondence with multiple receiving slots 312. It can be understood that two or more fire fighting components 32 can also be arranged in one receiving slot 312. The controller 42 is electrically connected to the multiple fire fighting components 32 at the same time, that is, the controller 42 can control the opening of each fire fighting component 32 respectively.

[0101] By providing a partition structure 33 in the outer shell 31 , it is convenient to arrange a plurality of fire-fighting components 32 in the contoured member 30 , which is conducive to achieving a better fire-fighting effect.

[0102] The fire control device 40 is used to control the profiling member 30 . The fire control device 40 can be fixed on the profiling member 30 or at other positions in the box body 10 .

[0103] The fire control device 40 includes an electrically connected sensor assembly 41 and a controller 42. The fire control device 40 cooperates with the profiling member 30 to play the role of active fire fighting. The sensor assembly 41 is used to collect environmental information in the box 10. The environmental information may include at least one of temperature, air pressure, light, gas concentration and other information; the controller 42 receives the environmental information sent by the sensor assembly 41 and controls the profiling member 30 to start according to the environmental information. For example, the sensor assembly 41 collects temperature information in the box 10. When the controller 42 determines that the temperature value exceeds the preset threshold, the controller 42 determines that the battery cell 21 has thermal runaway, and the controller 42 controls the fire fighting component 32 to start so that the fire fighting component 32 releases the fire extinguishing medium. The fire extinguishing medium released by the profiling member 30 can have the effect of cooling, extinguishing or delaying the fire.

[0104] During the use of the battery device 100, when one or more battery cells 21 have thermal runaway, the battery cells 21 will release emissions, which enter the box 10 and cause changes in the environment inside the box 10. The sensor assembly 41 collects environmental information inside the box 10, and the controller 42 controls the profiling member 30 to release the fire extinguishing medium based on the environmental information, thereby reducing the negative impact of the emissions from the battery cells 21 on other battery cells 21 and the structural parts inside the box 10, reducing the risk of thermal runaway spreading and the risk of structural parts catching fire and deforming, and improving the overall reliability of the battery device 100. It can be understood that when the battery device 100 is on fire and there is a risk of combustion of the battery device 100, the profiling member 30 and the fire control device 40 can also cooperate to extinguish the fire.

[0105] The battery device 100 provided in the embodiment of the present application includes a contour piece 30, and the shell 31 of the contour piece 30 can replace the battery cell 21 and provide an installation basis for the fire-fighting component 32. At the same time, by providing a partition structure 33 in the shell 31 of the contour piece 30, it is convenient to arrange multiple fire-fighting components 32 in the contour piece, which is conducive to achieving a better fire-fighting effect. In this way, when the capacity of the battery device 100 changes, the contour piece 30 can replace the battery cell 21 and occupy a certain space in the box body 10, that is, the contour piece 30 occupies the vacant installation position formed due to the reduction in the number of battery cells 21, reducing the need to change the size of the box body 10 and the arrangement of the battery cells 21, solving the problem of structural changes of the battery device 100 caused by capacity changes, saving the manufacturing cost of the battery device 100, and improving production efficiency. At the same time, the battery device 100 includes a fire control device 40, the sensor assembly 41 can occasionally collect environmental information inside the box 10 and the controller 42 can control the profiling member 30 to release the fire medium according to the environmental information. Therefore, the battery device 100 provided in the embodiment of the present application can extinguish or delay the fire by using the profiling member 30 and the fire control device 40, reduce the impact of thermal runaway of the battery cell 21, prevent or delay the spread of thermal runaway between the battery cells 21, block or delay the thermal runaway process, and improve the reliability of the battery device 100.

[0106] In some embodiments, a solenoid valve is provided on the fire-fighting component 32, and the solenoid valve is electrically connected to the controller 42, and the controller 42 can control the switch of the solenoid valve; in other embodiments, the fire-fighting component 32 can also be controlled by other types of switches such as gate valves and stop valves.

[0107] By adopting the above technical solution, the contoured member 30 includes a shell 31 and a fire-fighting component 32 arranged in the shell 31 . The shell 31 can replace the battery cell 21 and provide an installation basis for the fire-fighting component 32 . The controller 42 can control the start-up of the fire-fighting component 32 .

[0108] In some embodiments, the controller 42 is further used to determine the number of fire-fighting components 32 that need to be turned on based on environmental information and control the corresponding number of fire-fighting components 32 to be turned on.

[0109] Since the controller 42 is electrically connected to a plurality of fire fighting components 32, the controller 42 can control each fire fighting component 32 individually. During the use of the battery device 100, there may be one or more battery cells 21 that experience thermal runaway. The controller 42 determines the number of fire fighting components 32 that need to be opened based on the environmental information in the box 10, and sends a control signal to the corresponding number of fire fighting components 32, so that a number of fire fighting components 32 are opened to release the fire fighting medium. In some cases, the fire can be extinguished by opening a number of fire fighting components 32, and the remaining unopened fire fighting components 32 can remain closed or be opened in stages, so that the profiling member 30 can perform multiple fire extinguishing operations to curb the progress of thermal runaway.

[0110] By adopting the above technical solution, the controller 42 can control the opening of one or more fire-fighting components 32 according to environmental information, so that the number of fire-fighting components 32 opened can adapt to specific fire-fighting needs, and the contoured part 30 can release the fire-fighting medium multiple times, which is conducive to curbing the progress of thermal runaway.

[0111] Please refer to Figure 5 and Figure 8 In some embodiments, the environmental information includes temperature information, the sensor assembly 41 includes a temperature sensor 411, and the temperature sensor 411 is used to collect temperature information in the box 10; the controller 42 is used to control one or more fire-fighting components 32 to open according to the temperature information.

[0112] When the battery cell 21 experiences thermal runaway, it will release emissions into the box 10. The emissions from the battery cell 21 mentioned in this application include but are not limited to: electrolyte, dissolved or split positive and negative pole pieces, separator fragments, high-temperature and high-pressure gas generated by the reaction, flames, etc. Therefore, the thermal runaway of the battery cell 21 will cause changes in environmental information such as temperature and air pressure in the box 10.

[0113] In some embodiments, the fire control device 40 also includes a box body, the sensor component 41 is arranged on the box body, and the controller 42 is arranged in the box body. It can be understood that the sensor component 41 can also be arranged at other positions in the box body 10, as long as the sensor component 41 can be electrically connected to the controller 42.

[0114] The sensor assembly 41 includes a temperature sensor 411, which is a sensor that can sense temperature and convert it into a usable output signal. The temperature sensor 411 is used to collect temperature information in the box 10 and transmit the temperature information to the controller 42. Optionally, the sensor assembly 41 may also include other types of sensors, such as an air pressure sensor 412, a smoke sensor, a light sensor, a gas detector, etc. The gas detector is used to monitor the concentration change value of the combustible gas in the box.

[0115] The controller 42 controls one or more fire-fighting components 32 to open according to the temperature information.

[0116] For example, the controller 42 determines whether the temperature in the box 10 exceeds a preset temperature threshold based on the temperature information. If yes, the controller 42 controls one or more fire fighting components 32 to be turned on. The temperature threshold is, for example, 180 to 220 degrees Celsius, but is not limited thereto. Further, the controller 42 calculates the temperature difference between the temperature in the box 10 and the preset temperature threshold based on the temperature information, and matches the number of fire fighting components 32 that need to be turned on based on the temperature difference. For example, if the temperature difference is greater than 0 and less than a first preset value, A1 fire fighting components 32 are controlled to be turned on; if the temperature difference is greater than the first preset value, A2 fire fighting components 32 are controlled to be turned on, and A2 is greater than A1. The first preset value can be pre-defined and used to determine the state of thermal runaway.

[0117] By adopting the above technical solution, the controller 42 can control the opening of the fire-fighting component 32 according to the temperature information, achieve the effect of precise fire extinguishing, and effectively curb the spread of thermal runaway.

[0118] In some embodiments, the environmental information also includes air pressure information, and the sensor assembly 41 also includes an air pressure sensor 412, which is used to collect air pressure information in the box 10, and the controller 42 is used to control one or more fire-fighting components 32 to open based on at least one of the temperature information and the air pressure information.

[0119] The air pressure sensor 412 is a sensor for measuring the gas pressure in the surrounding environment. The air pressure sensor 412 is used to collect air pressure information in the box 10 and transmit the air pressure information to the controller 42.

[0120] For example, the controller 42 determines whether the air pressure in the box 10 exceeds the preset air pressure threshold based on the air pressure information. If yes, the controller 42 controls one or more fire fighting components 32 to be turned on. The air pressure threshold is, for example, 2.3-2.7 kPa, but is not limited thereto. Further, the controller 42 calculates the air pressure difference between the air pressure in the box 10 and the preset air pressure threshold based on the air pressure information, and matches the number of fire fighting components 32 that need to be turned on based on the air pressure difference. For example, if the air pressure difference is greater than 0 and less than the second preset value, A3 fire fighting components 32 are controlled to be turned on; if the temperature difference is greater than the second preset value, A4 fire fighting components 32 are controlled to be turned on, and A4 is greater than A2. The second preset value can be pre-defined and used to determine the state of thermal runaway.

[0121] For example, the controller 42 may also determine the number of fire-fighting components 32 that need to be opened in combination with the temperature information and the air pressure information.

[0122] By adopting the above technical solution, the controller 42 can control the opening of the fire-fighting component 32 according to the temperature information and / or the air pressure information, thereby achieving the effect of precise fire extinguishing and effectively curbing the spread of thermal runaway.

[0123] In some embodiments, the controller 42 is also used to calculate the temperature change rate based on the temperature information and the air pressure change rate based on the air pressure information, and to determine the number of fire-fighting components 32 that need to be opened based on at least one of the temperature information, air pressure information, the temperature change rate and the air pressure change rate.

[0124] The temperature change rate reflects the temperature fluctuation in the box 10. The greater the temperature change rate, the more serious the thermal runaway of the battery cell; the air pressure change rate reflects the air pressure fluctuation in the box 10. The greater the air pressure change rate, the more serious the thermal runaway of the battery cell. The number of firefighting components 32 to be opened is determined based on at least one of the temperature information, the air pressure information, the temperature change rate and the air pressure change rate to meet the needs of fire extinguishing.

[0125] For example, the controller 42 matches the number of firefighting components 32 to be opened according to the temperature change rate, and / or matches the number of firefighting components 32 to be opened according to the air pressure change rate. For example, if the temperature change rate is less than the third preset value, the controller 42 controls half of the firefighting components 32 to be opened; if the temperature rate is less than the third preset value, the controller 42 controls all of the firefighting components 32 to be opened. For another example, if the air pressure change rate is less than the fourth preset value, the controller 42 controls half of the firefighting components 32 to be opened; if the air pressure rate is less than the fourth preset value, the controller 42 controls all of the firefighting components 32 to be opened. It can be understood that the number of firefighting components 32 that the controller 42 controls to be opened each time is less than or equal to the total number of firefighting components 32, which can be specifically set according to firefighting needs.

[0126] By adopting the above technical solution, the controller 42 can judge the thermal runaway state of the battery cell 21 and determine the number of fire-fighting components 32 that need to be opened through the changes in temperature and air pressure in the box 10. Through the cooperation of the controller 42 and the contoured part 30, timely and effective cooling and fire extinguishing functions are achieved.

[0127] like Figure 8 As shown, optionally, the controller 42 is also electrically connected to a battery management system 50 (Battery Management System, BMS), and the controller 42 is used to send fire warning information to the battery management system 50.

[0128] The battery management system 50 is a system for monitoring and managing the status of the battery pack. The controller 42 can determine the thermal runaway state of the battery cell 21 based on the environmental information, and send fire warning information to the battery management system 50 after determining that the battery cell 21 has thermal runaway. After the battery management system 50 receives the fire warning information, the battery management system 50 can take corresponding protection measures, such as alarm, power off, etc., to reduce the use risk of the battery device 100.

[0129] In some embodiments, multiple battery cells 21 in the battery cell assembly 20 are arranged along the first direction X, and the contoured member 30 and the battery cells 21 are arranged along the first direction X; the partition structure 33 includes multiple first reinforcing ribs 331 and multiple second reinforcing ribs 332, the first reinforcing ribs 331 extend along the first direction X, and the extension direction of the second reinforcing ribs 332 intersects with the first reinforcing ribs 331.

[0130] Since the contour piece 30 is stacked with the battery cell 21 and can replace the battery cell 21, the contour piece 30 can support the adjacent battery cell 21, thereby reducing the risk of excessive expansion and deformation of the battery cell 21; wherein, the outer shell 31 in the contour piece 30 abuts against the battery cell, and the first reinforcing ribs 331 and the second reinforcing ribs 332 in the outer shell 31 can enhance the structural strength of the contour piece 30, thereby improving the supporting effect of the contour piece 30 on the battery cell 21.

[0131] The plurality of first reinforcing ribs 331 are arranged in parallel and at intervals, and the plurality of second reinforcing ribs 332 are arranged in parallel and at intervals, so that the plurality of first reinforcing ribs 331 and the plurality of second reinforcing ribs 332 divide the space inside the housing 31 into a plurality of receiving grooves 312 arranged in an array.

[0132] The plurality of battery cells 21 in the battery cell assembly 20 are arranged in sequence along the first direction X, and the first reinforcing ribs 331 also extend along the first direction X, so that the first reinforcing ribs 331 can support the battery cells 21 disposed adjacent to the contoured member 30 and inhibit the battery cells 21 from over-expanding.

[0133] The second reinforcing rib 332 may intersect the first reinforcing rib 331 vertically or obliquely. Figures 5 to 7 In some embodiments, the opening 311 of the housing 31 faces the side away from the battery cell 21, the height direction of the battery cell 21 is the third direction Z, the first reinforcing rib 331 extends along the first direction X, and the second reinforcing rib 332 extends along the third direction Z. In other embodiments, please refer to 2 and Fig. 9 The opening 311 of the outer shell 31 faces the upper box body 11 , and the second reinforcing rib 332 extends along the second direction Y, which may be the width direction of the box body 10 .

[0134] By adopting the above technical solution, the shell 31 in the contour member 30 abuts against the battery cell 21, and the first reinforcing ribs 331 and the second reinforcing ribs 332 in the shell 31 can enhance the structural strength of the contour member 30, thereby improving the supporting effect of the contour member 30 on the battery cell 21 and reducing the risk of excessive expansion and deformation of the battery cell 21.

[0135] Please refer to Figures 2 to 9 In some embodiments, the box body 10 includes an upper box body 11 and a lower box body 12 , and the upper box body 11 and the lower box body 12 are buckled with each other; the opening 311 of the shell 31 faces at least one of the upper box body 11 and the lower box body 12 .

[0136] The box body 10 includes an upper box body 11 and a lower box body 12, and the upper box body 11 and the lower box body 12 enclose a containing space. The upper box body 11 and the lower box body 12 can be of various structures. For example, the upper box body 11 and the lower box body 12 can both include a frame and a bottom plate; for example, one of the upper box body 11 and the lower box body 12 includes a frame and a bottom plate, and the other includes a bottom plate; the upper box body 11 or the lower box body 12 can also be used as a part of the chassis structure of the vehicle 1000.

[0137] The firefighting medium released by the firefighting component 32 is discharged into the accommodation space of the box body 10 through the opening 311 of the shell 31. The opening 311 of the shell 31 can be arranged toward the upper box body 11, or toward the lower box body 12, or the shell 31 has an opening 311 on one side facing the upper box body 11 and on one side facing the side wall of the lower box body 12.

[0138] By adopting the above technical solution, the opening 311 of the shell 31 can be flexibly set to facilitate the fire-fighting medium released by the fire-fighting component 32 to smoothly enter the accommodating space of the box body 10 so as to extinguish the fire using the fire-fighting medium.

[0139] In some embodiments, the shaped member 30 is stacked with the battery cell assembly 20 and is used to support the battery cell 21. At this time, the opening 311 on the shell 31 is arranged on the other side of the shaped member 30 away from the battery cell 21, so that the fire-fighting medium can be sprayed out smoothly from the opening 311.

[0140] Please refer to Figures 4 to 7 In some embodiments, the box body 10 includes a side beam 121 extending along a first direction X and an end beam 122 extending along a second direction Y, the end beam 122 is connected to the side beam 121, and the second direction y intersects with the first direction X; wherein, the profiling member 30 is arranged on a side of the battery cell assembly 20 close to the end beam 122, the profiling member 30 is arranged opposite to the end beam 122, and the opening 311 of the shell 31 faces the end beam 122; or, the profiling member 30 is arranged opposite to the side beam 121, and the opening of the shell 31 faces the side beam 121.

[0141] The end beam 122 is arranged on one side of the battery cell assembly 20 along the first direction X, the profiling member 30 is arranged between the battery cell assembly 20 and the end beam 122, a gap is provided between the shell 31 and the end beam 122, and the opening 311 of the shell 31 faces the end beam 122, that is, the opening 311 of the shell 31 is arranged on the side of the shell 31 away from the battery cell assembly 20, and the fire-fighting medium released by the fire-fighting component 32 enters the accommodating space of the box body 10 through the opening 311; the side of the shell 31 facing the battery cell assembly 20 can abut against the battery cell 21 to play a supporting role.

[0142] In some embodiments, the lower box 12 includes two parallel and oppositely arranged side beams 121, and the end beam 122 is connected between the two side beams 121; optionally, the lower box 12 also includes two oppositely arranged cross beams 123, each cross beam 123 is connected to the two side beams 121, and the two cross beams 123 and the two side beams 121 form a frame to define the accommodation space, and the end beam 122 is arranged inside the frame, and the end beam 122 divides the accommodation space into a first area for accommodating the battery cell assembly 20 and a second area for accommodating electrical components such as a high-voltage box. The profiling member 30 is arranged in the first area, and the fire control device 40 can be arranged in the first area or the second area.

[0143] In another embodiment, the profiling member 30 may also be arranged opposite to the side beam 121, and the opening of the housing 31 faces the side beam 121. A certain gap is provided between the profiling member 30 and the side beam 121 to facilitate the fire fighting medium to flow from the opening 311 into the accommodation space of the box body 10.

[0144] In other embodiments, the end beams 122 may also serve as beam bodies that form a frame, that is, two end beams 122 and two side beams 121 together form a frame.

[0145] By adopting the above technical solution, the opening 311 of the shell 31 faces the end beam 122 or the side beam 121, and the fire-fighting medium released by the fire-fighting component 32 can smoothly enter the accommodating space of the box body 10 through the opening 311; the side of the shell 31 facing the battery cell assembly 20 can abut against the battery cell 21 to play a supporting role.

[0146] Please refer to Figure 2 , Figure 3 and Fig. 9 In another embodiment, a pressure relief mechanism 215 is provided on the battery cell 21 , and the opening 311 of the housing 31 and the pressure relief mechanism 215 face the same side of the box body 10 .

[0147] Optionally, the pressure relief mechanism 215 and the opening 311 of the outer shell 31 are facing the upper box body 11, and an exhaust gap is formed between the battery cell 21 and the upper box body 11. When the pressure relief mechanism 215 is actuated, the high-temperature and high-pressure substances inside the battery cell 21 are discharged outward from the pressure relief mechanism 215 as emissions and enter the exhaust gap; the opening 311 of the outer shell 31 is facing the upper box body 11, and the fire-fighting medium released by the fire-fighting component 32 can smoothly enter the accommodating space of the box body 10 through the opening 311 and directly mix with the emissions to achieve the effect of cooling and extinguishing the fire.

[0148] It can be understood that if the pressure relief mechanism 215 faces the lower box body 12 , the opening 311 of the outer shell 31 can also be disposed toward the lower box body 12 .

[0149] By adopting the above technical solution, the opening 311 of the shell 31 and the pressure relief mechanism 215 are facing the same side of the box body 10. The fire-fighting medium released by the fire-fighting component 32 can smoothly enter the accommodating space of the box body 10 through the opening 311 and directly mix with the emissions, so as to achieve a timely cooling and fire-extinguishing effect.

[0150] In some embodiments, Figure 4 and Figure 5 As shown, the fire control device 40 is fixed on the contour member 30.

[0151] Specifically, the fire control device 40 is fixed on the housing 31, which can facilitate the electrical connection between the fire control device 40 and the fire component 32, and the installation method of the fire control device 40 is simple and convenient. During installation, the fire control device 40 can be fixed on the profiling member 30 in advance, and then the profiling member 30 is fixed in the box 10 by bonding or other methods, so that the profiling member 30 and the fire control device 40 can be fixed in the box 10 together.

[0152] For example, the opening 311 of the housing 31 is located at the side of the housing 31 away from the battery cell 21, and the fire control device 40 is fixed to the top of the housing 31, which neither affects the release of the fire-fighting medium from the opening 311 by the contoured member 30 nor occupies too much space.

[0153] By fixing the fire control device 40 on the shaped member 30 , it is convenient to electrically connect the fire control device 40 with the shaped member 30 , and the installation method of the fire control device 40 is simple and convenient.

[0154] Please refer to Fig. 9 In other embodiments, the fire control device 40 may also be spaced apart from the contoured member 30 and electrically connected to the contoured member 30 via a connecting line.

[0155] Please refer to Figures 3 to 9 In some embodiments, the shape of the contoured member 30 is the same as the shape of the battery cell 21 .

[0156] The contour member 30 and the battery cell 21 have the same shape, which may be the same or substantially the same geometric shape as the battery cell 21 , or the same or substantially the same outer contour as the battery cell 21 .

[0157] For example, the shape of the battery cell 21 depends on the shape of the shell 211, and the shape of the profiling member 30 depends on the shape of the shell 31. The shell 31 has the same shape as the shell 211, and the shell 31 is not provided with structures similar to the electrode terminal 214, the pressure relief mechanism 215 and the like.

[0158] When the shape of the profiling member 30 is the same as that of the battery cell 21, the size of the profiling member 30 is equal to or proportional to the size of the battery cell 21; due to the influence of processing technology, etc., there may be errors in the processing of the profiling member 30. At this time, the shape of the profiling member 30 and the shape of the battery cell 21 can be roughly the same, and the size of the profiling member 30 and the size of the battery cell 21 may not be completely the same or completely proportional.

[0159] For example, when the battery cell 21 is a square shell battery cell, the profiling member 30 is a rectangular parallelepiped structure; at this time, the length, width and height of the profiling member 30 are equal to the length, width and height of the battery cell 21, or the length, width and height of the profiling member 30 are equal in proportion to the corresponding length, width and height of the battery cell 21.

[0160] For example, when the battery cell 21 is a cylindrical battery cell, the profiling member 30 is a cylindrical structure; at this time, the height and radius of the profiling member 30 are equal to the height and radius of the battery cell 21, or the height and radius of the profiling member 30 are in the same ratio to the corresponding height and radius of the battery cell 21.

[0161] When the number of battery cells 21 is reduced to lower the capacity of the battery device 100 , the shape of the contour piece 30 is made the same as that of the battery cell 21 , so that the contour piece 30 can be easily installed in an empty installation position. After installation, the contour piece 30 can support the adjacent battery cells 21 and suppress the expansion deformation of the adjacent battery cells 21 .

[0162] Please refer to Figures 4 to 9 In some embodiments, the plurality of battery cells 21 in the battery cell assembly 20 are arranged along a first direction X; along the first direction X, the ratio of the size of the profiling member 30 to the size of the battery cell 21 ranges from 0.9N to 1.1N, N is a positive integer and N is less than 5; and / or, along the second direction Y, the ratio of the size of the profiling member 30 to the size of the battery cell ranges from 0.9M to 1.1M, M is a positive integer and M is less than 5, and the second direction intersects with the first direction.

[0163] like Figure 3 As shown, the first direction X is the arrangement direction of the plurality of battery cells 21 in the battery cell assembly 20 , and the first direction X may be the width direction of the battery cells 21 .

[0164] For example, in the first direction X, the ratio of the size of the contour member 30 to the size of the battery cell 21 can be 0.9. At this time, the size of the contour member 30 in the first direction X is smaller than the battery cell 21. This setting can reduce the difficulty of placing the contour member 30 into an empty installation position, thereby reducing the difficulty of installing the contour member 30; at the same time, it can also reduce the squeezing of the battery cell 21 by the contour member 30.

[0165] For example, in the first direction X, the ratio of the size of the contour member 30 to the size of the battery cell 21 can be 1.0. In this case, the size of the contour member 30 in the first direction X is equal to the battery cell 21, and the contour member 30 can better replace the battery cell 21, so that the battery cell 21 and the contour member 30 form a battery cell assembly 20 and are loaded into the box body 10; at the same time, the equal size of the contour member 30 and the battery cell 21 in the first direction X also enables the contour member 30 to provide support for other adjacent battery cells 21 in the same way as the battery cell 21.

[0166] For example, in the first direction X, the ratio of the size of the contour member 30 to the size of the battery cell 21 can be 1.1. At this time, the size of the contour member 30 in the first direction X is larger than the battery cell 21. The contour member 30 can better provide support for the adjacent battery cell 21 and better suppress the expansion deformation of the adjacent battery cell 21 in the first direction X.

[0167] For example, the size of the contoured member 30 may also be set according to an integral multiple of the size of the battery cell 21 to replace a plurality of battery cells 21. In this case, N≥2.

[0168] For example, N=2, and one contour piece 30 can replace two battery cells 21 along the first direction X.

[0169] For example, N=3, and one contour piece 30 can replace three battery cells 21 along the first direction Y.

[0170] In the case where a separator is provided between adjacent battery cells 21 , the contoured member 30 may also replace the thickness of N battery cells 21 and N−1 separators.

[0171] By adopting the above technical solution, the size of the contour member 30 and one or more battery cells 21 in the first direction X is equal to or similar to that of the battery cells 21 , so that the contour member 30 can replace the battery cells 21 and occupy the vacant installation position.

[0172] Along the second direction Y, the ratio of the size of the profiling member 30 to the size of the battery cell 21 ranges from 0.9M to 1.1M, and the second direction intersects the first direction. The second direction Y may be perpendicular to the first direction X, or may intersect at other angles, and the second direction may be the length direction of the battery cell 21. For example, along the second direction Y, the ratio of the size of the profiling member 30 to the size of the battery cell 21 may be 0.9, 0.95, 1.0, 1.05, 1.1 or other values.

[0173] For example, in the second direction Y, the ratio of the size of the contour member 30 to the size of the battery cell 21 can be 0.9. At this time, the size of the contour member 30 in the second direction Y is smaller than the battery cell 21. This setting can reduce the difficulty of placing the contour member 30 into an empty installation position, thereby reducing the difficulty of installing the contour member 30; at the same time, it can also reduce the squeezing of the battery cell 21 by the contour member 30.

[0174] For example, in the second direction Y, the ratio of the size of the contour member 30 to the size of the battery cell 21 can be 1.0. In this case, the size of the contour member 30 in the second direction Y is equal to the battery cell 21, and the contour member 30 can better replace the battery cell 21, so that the battery cell 21 and the contour member 30 form a battery cell assembly and are loaded into the box body 10; at the same time, the equal size of the contour member 30 and the battery cell 21 in the second direction Y also enables the contour member 30 to provide support for other adjacent battery cells 21 in the same way as the battery cell 21.

[0175] For example, in the second direction Y, the ratio of the size of the contour member 30 to the size of the battery cell 21 may be 1.1. In this case, the size of the contour member 30 in the second direction Y is larger than the battery cell 21 , and the contour member 30 can better provide support for the adjacent battery cell 21 .

[0176] For example, M=2, one contour piece 30 can replace two battery cells 21 along the second direction Y, and one contour piece 30 is stacked and arranged with two rows of battery cell assemblies 20 at the same time.

[0177] For example, M=3, one contour piece 30 can replace three battery cells 21 along the second direction Y, and one contour piece 30 is stacked and arranged with three rows of battery cell assemblies 20 at the same time.

[0178] By adopting the above technical solution, the dimensions of the profiling member 30 and the battery cell 21 in the second direction Y are equal or similar, which facilitates the replacement of one or more battery cells 21 and reduces the difficulty of installing the profiling member 30 .

[0179] Please refer to Figures 2 to 9 Some embodiments of the present application provide a battery device 100, including a housing 10, a battery cell assembly 20, a profiling member 30 and a fire control device 40, wherein the battery cell assembly 20 is accommodated in the housing 10, and the battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence; the profiling member 30 is accommodated in the housing 10, and the profiling member 30 is arranged in an arrangement with the battery cell assembly 20 and is used to replace one or more battery cells 21, and the profiling member 30 includes a shell 31 with an opening and a plurality of fire-fighting components 32 arranged in the shell 31; the fire-fighting control device 40 is accommodated in the housing 10, and the fire-fighting control device 40 includes an electrically connected sensor assembly 41 and a controller 42, wherein the sensor assembly 41 is used to collect environmental information in the housing 10, and the controller 42 is used to control one or more fire-fighting components 32 to release a fire-extinguishing medium according to the environmental information.

[0180] The battery device 100 provided in the embodiment of the present application includes a contour piece 30. On the one hand, the battery device can use the contour piece 30 to replace the battery cell 21. The contour piece 30 can be actually used in production, and there is no need to adjust the structure of the box 10 and other structures due to capacity changes. This solves the problem of structural changes of the battery device 100 caused by capacity changes, saves production costs, and improves production efficiency. On the other hand, the battery device 100 can use the fire control device 40 to monitor environmental information in the box 10. The fire control device 40 controls the fire fighting component 32 to spray a fire extinguishing medium when the battery cell 21 has thermal runaway or other fire fighting needs, thereby reducing the negative impact of high-temperature and high-pressure emissions on other battery cells 21 and structural parts, preventing or delaying the spread of thermal runaway between battery cells 21, blocking or delaying the thermal runaway process, and improving the reliability of the battery device 100. In an emergency, it can provide personnel with a longer escape time.

[0181] In a second aspect, some embodiments of the present application further provide an energy storage device, including the battery device 100 provided by some embodiments of the first aspect, and the battery device 100 is used to store or provide electrical energy.

[0182] Some embodiments of the present application provide an energy storage device, including one or more battery clusters (BatteryCluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0183] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0184] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0185] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0186] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0187] In a third aspect, some embodiments of the present application further provide an electrical device, including the battery device 100 provided by some embodiments of the first aspect or the energy storage device provided by some embodiments of the second aspect, wherein the battery device 100 is used to store or provide electrical energy.

[0188] The electrical device may be a vehicle 1000, or may be a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, an electric vehicle, a ship, a spacecraft, and the like.

[0189] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: Box; A battery cell assembly is contained in the box, wherein the battery cell assembly includes a plurality of battery cells arranged in sequence; a profiling member contained in the box, the profiling member being arranged in an arrangement with the battery monomer assembly and being used to replace one or more of the battery monomers, the profiling member comprising a shell provided with an opening, a partition structure provided in the shell, and a plurality of fire-fighting components, the shell and the battery monomer assembly being arranged in a stacked manner, the partition structure dividing the space in the shell into a plurality of receiving slots, the opening being communicated with the plurality of receiving slots, a plurality of fire-fighting components being respectively provided in the corresponding receiving slots, the fire-fighting components being components containing a fire-extinguishing medium, the fire-fighting components being able to release the fire-extinguishing medium in an open state, the fire-fighting medium released by the fire-fighting components being discharged into the receiving space of the box via the opening; A fire control device is contained in the housing, and includes an electrically connected sensor assembly and a controller. The sensor assembly is used to collect environmental information in the housing, and the controller is electrically connected to the fire fighting component. The controller is used to control the fire fighting component to release the fire extinguishing medium according to the environmental information.

2. The battery device according to claim 1, characterized in that The controller is also used to determine the number of the fire-fighting components that need to be opened according to the environmental information and control the corresponding number of the fire-fighting components to be opened.

3. The battery device according to claim 2, characterized in that: The environmental information includes temperature information, the sensor assembly includes a temperature sensor, and the temperature sensor is used to collect temperature information inside the box; the controller is used to control one or more of the fire-fighting components to open according to the temperature information.

4. The battery device according to claim 3, characterized in that: The environmental information also includes air pressure information, and the sensor assembly also includes an air pressure sensor, which is used to collect air pressure information in the box. The controller is used to control the opening of one or more fire-fighting components based on at least one of the temperature information and the air pressure information.

5. The battery device according to claim 4, characterized in that: The controller is also used to calculate the temperature change rate based on the temperature information and the air pressure change rate based on the air pressure information, and to determine the number of fire-fighting components that need to be opened based on at least one of the temperature information, the air pressure information, the temperature change rate and the air pressure change rate.

6. The battery device according to claim 1, wherein: The plurality of battery cells in the battery cell assembly are arranged along a first direction, and the contoured member and the battery cells are arranged along the first direction; The partition structure includes a plurality of first reinforcing ribs and a plurality of second reinforcing ribs, wherein the first reinforcing ribs extend along the first direction, and the extending direction of the second reinforcing ribs intersects with the first reinforcing ribs.

7. The battery device according to claim 1, characterized in that: The box body comprises an upper box body and a lower box body, and the upper box body and the lower box body are buckled with each other; The opening of the housing faces at least one of the upper case and the lower case.

8. The battery device according to claim 1, wherein: The box body includes a side beam extending along a first direction and an end beam extending along a second direction, the end beam is connected to the side beam, and the second direction intersects with the first direction; Wherein, the profiling member is arranged on a side of the battery cell assembly close to the end beam, the profiling member is arranged opposite to the end beam, and the opening of the shell faces the end beam, or, The contoured member is arranged opposite to the side beam, and the opening of the shell faces the side beam.

9. The battery device according to claim 1, characterized in that: The battery cell is provided with a pressure relief mechanism, and the opening of the shell and the pressure relief mechanism face the same side of the box body.

10. The battery device according to any one of claims 1 to 9, characterized in that: The fire control device is fixed on the contoured member.

11. The battery device according to any one of claims 1 to 9, characterized in that: The contoured member has the same shape as that of the battery cell.

12. The battery device according to any one of claims 1 to 9, characterized in that: The plurality of battery cells in the battery cell assembly are arranged along a first direction; Along the first direction, the ratio of the size of the contour piece to the size of the battery cell ranges from 0.9N to 1.1N, N is a positive integer and N is less than 5; and / or, along the second direction, the ratio of the size of the contour piece to the size of the battery cell ranges from 0.9M to 1.1M, M is a positive integer and M is less than 5, and the second direction intersects with the first direction.

13. An energy storage device, characterized in that: The invention comprises a plurality of battery devices according to any one of claims 1 to 12, wherein the battery devices are used to store or provide electrical energy.

14. An electrical device, characterized in that: The invention comprises the battery device according to any one of claims 1 to 12 or the energy storage device according to claim 13, wherein the battery device is used to store or provide electrical energy.

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