Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and provides a battery device and a power utilization device.The battery device comprises a box body, a plurality of battery monomers, a heat management assembly and a liquid leakage detection assembly.The heat management assembly comprises a heat management part, a current collector, a connecting pipe body and cooling liquid; the liquid leakage detection assembly comprises at least one of a first liquid leakage induction piece and a second liquid leakage induction piece, the first liquid leakage induction piece is arranged at the joint of the heat management component and the current collector, and the second liquid leakage induction piece is arranged at the joint of the connecting pipe body and the current collector; according to the battery device provided by the embodiment of the invention, the liquid leakage detection assembly can detect the liquid leakage condition in time, so that the battery device with leaked cooling liquid can be treated in time.

Description

TECHNICAL FIELD

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

[0002] Energy saving and emission reduction is the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy saving and environmental protection advantages. For electric vehicles, battery device technology is an important factor for its development.

[0003] The battery device will continuously generate heat in the working state. In order to reduce the influence of heat, a thermal management component is arranged inside the battery device, and the cooling liquid is introduced into the thermal management component to achieve the effect of heat exchange and cooling. However, during the flow of the cooling liquid in the thermal management component, the cooling liquid may leak from the connection of the thermal management component. In the related art, it is difficult to detect the occurrence of the liquid leakage, thereby causing the battery device to be affected by the cooling liquid leakage and to have the risk of insulation failure. UTILITY MODEL CONTENT

[0004] The purpose of the embodiments of the present application is to provide a battery device and a power utilization device, which aims to solve the problem that the leakage of the cooling liquid of the thermal management component inside the battery device in the related art is difficult to detect in time.

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

[0006] In a first aspect, the embodiments of the present application provide a battery device, which comprises a box body, a plurality of battery monomers, a thermal management component, and a liquid leakage detection component for detecting the leakage of the cooling liquid. The box body is internally provided with a containing cavity, and the plurality of battery monomers are accommodated in the containing cavity. The thermal management component comprises a thermal management part, a current collector, a connecting pipe body, and a cooling liquid. The cooling liquid is configured to flow in the thermal management part, the current collector, and the connecting pipe body. At least two thermal management parts are arranged at intervals along a first direction, and a battery monomer is arranged between the adjacent two thermal management parts. The battery monomer is heat exchangeably connected with the thermal management part. In a second direction, the opposite ends of each thermal management part are respectively connected with the current collector, and the current collectors on the same side of the adjacent two thermal management parts are connected by the connecting pipe body. The first direction is perpendicular to the second direction. The liquid leakage detection component comprises at least one of a first liquid leakage sensing piece and a second liquid leakage sensing piece. The first liquid leakage sensing piece is arranged at the connection between the thermal management part and the current collector, and the second liquid leakage sensing piece is arranged at the connection between the connecting pipe body and the current collector. The first liquid leakage sensing piece and the second liquid leakage sensing piece are used to detect whether the cooling liquid leaks.

[0007] The battery device provided by the embodiments of the present application can detect the leakage of the cooling liquid in time when the leakage of the cooling liquid occurs between the thermal management component and the current collector or between the connecting pipe body and the current collector, so that the battery device with the leaked cooling liquid can be processed in time, and the influence of the leaked cooling liquid on the battery device can be effectively reduced.

[0008] In some embodiments, the first leakage sensing part is located below the thermal management component and the current collector in the direction of gravity, and / or the second leakage sensing part is located below the connecting pipe body and the current collector in the direction of gravity; wherein the first direction, the second direction and the direction of gravity are perpendicular to each other.

[0009] By adopting the above technical solution, when the leakage of the cooling liquid occurs between the thermal management component and the current collector, the leaked cooling liquid flows downward according to the action of gravity, so that the probability of the first leakage sensing part located below detecting the occurrence of the leakage is higher; and / or when the leakage of the cooling liquid occurs between the connecting pipe body and the current collector, the leaked cooling liquid flows downward according to the action of gravity, so that the probability of the second leakage sensing part located below detecting the occurrence of the leakage is higher; therefore, the influence of the leaked cooling liquid on the battery device can be further reduced.

[0010] In some embodiments, the battery device further comprises a battery management system, and the leakage detection assembly is electrically connected to the battery management system.

[0011] By adopting the above technical solution, when the leakage detection assembly detects the occurrence of the leakage, the leakage detection assembly can transmit an electrical signal to the battery management system, so that the battery management system can acquire the leakage signal in time, and the response speed of the battery device to the leakage can be improved.

[0012] In some embodiments, the battery device further comprises a sampling line, and the sampling line electrically connects the leakage detection assembly and the battery management system.

[0013] By adopting the above technical solution, the electrical connection between the leakage detection assembly and the battery management system is realized by using the sampling line, the wiring of the sampling line is more flexible, so as to utilize the space inside the accommodating cavity; at the same time, the sampling line is convenient for insulation treatment, so that the short circuit risk of the electrical connection between the leakage detection assembly and the battery management system can be effectively reduced.

[0014] In some embodiments, the first liquid leakage sensing member is connected to at least one of the thermal management component and the current collector, and the first liquid leakage sensing member is arranged at the at least partial connection between the thermal management component and the current collector; and / or, the second liquid leakage sensing member is connected to at least one of the connecting pipe body and the current collector, and the second liquid leakage sensing member is arranged at the at least partial connection between the connecting pipe body and the current collector.

[0015] By using the above technical solutions, when liquid leakage occurs at the connection between the thermal management component and the current collector, the leaked cooling liquid is more likely to be detected by the first liquid leakage sensing member; and / or, when liquid leakage occurs at the connection between the connecting pipe body and the current collector, the leaked cooling liquid is more likely to be detected by the second liquid leakage sensing member; thus, the sensing accuracy of the liquid leakage detection assembly can be improved.

[0016] In some embodiments, the battery device further comprises a liquid containing structure arranged in the accommodating cavity, and a liquid collecting groove is arranged on the liquid containing structure; in the second direction, the liquid containing structure is arranged on at least one side of the plurality of battery cells; and in the direction of gravity, the liquid collecting groove is located below the current collector and the connecting pipe body.

[0017] By using the above technical solutions, when liquid leakage occurs at the connection between the current collector and the thermal management component, or when liquid leakage occurs at the connection between the current collector and the connecting pipe body, the leaked cooling liquid can drop into the liquid collecting groove of the liquid containing structure below for collection, thereby effectively reducing the probability of internal short circuit of the battery cells caused by the leaked cooling liquid.

[0018] In some embodiments, in the direction of gravity, the projection of the connection between the current collector and the thermal management component is located within the projection range of the liquid collecting groove, and the projection of the connection between the connecting pipe body and the current collector is located within the projection range of the corresponding liquid collecting groove.

[0019] By using the above technical solutions, when liquid leakage occurs at the connection between the current collector and the thermal management component, or when liquid leakage occurs at the connection between the current collector and the connecting pipe body, the leaked cooling liquid is more likely to fall into the liquid collecting groove, thereby further reducing the probability of internal short circuit of the battery cells caused by the leaked cooling liquid.

[0020] In some embodiments, the liquid leakage detection assembly further comprises a liquid level sensor arranged in the liquid collecting groove and configured to detect the liquid level of the cooling liquid; and the battery device further comprises a battery management system, and the liquid level sensor is electrically connected to the battery management system.

[0021] By using the above technical solutions, the liquid level of the cooling liquid in the liquid collecting groove of the liquid containing structure can be detected by using the liquid level sensor, thereby the amount of the leaked cooling liquid can be determined to achieve the purpose of determining the leakage degree.

[0022] In some embodiments, the box includes two side beams spaced apart along the second direction, and a plurality of battery cells are arranged between the two side beams; the side beam includes a main body portion and a connecting portion, the connecting portion is arranged on a side of the main body portion facing the accommodation cavity along the second direction; the connecting portion includes a first surface facing the accommodation cavity along the direction of gravity, and the liquid containing structure is arranged on the first surface.

[0023] By adopting the technical scheme, the liquid containing structure can be arranged on the first surface of the connecting portion of the side beam, so that the assembly stability of the liquid containing structure is improved.

[0024] In some embodiments, at least part of the current collector is located above the first surface along the second direction, and a gap is formed between the current collector and the first surface; the liquid containing structure is arranged between the first surface and the current collector and connected to the first surface.

[0025] By adopting the technical scheme, the liquid containing structure can be arranged between the first surface and the current collector and connected to the first surface, so that the collection effect of the liquid collecting groove of the liquid containing structure on the leaked cooling liquid of the current collector is effectively improved, and the probability of the leaked cooling liquid flowing into the accommodation cavity is reduced.

[0026] In some embodiments, the main body portion includes a second surface facing the accommodation cavity along the second direction, the second surface is connected to the first surface, and one side of the liquid containing structure abuts on the second surface.

[0027] By adopting the technical scheme, the liquid containing structure can abut on the second surface, and when the leaked cooling liquid drops on the second surface, the second surface can guide the cooling liquid into the liquid containing structure, so as to further reduce the probability of short circuit of the internal battery cells caused by the leaked cooling liquid.

[0028] In some embodiments, the bottom wall of the liquid containing structure is provided with a liquid discharge hole, and the liquid discharge hole is communicated with the liquid collecting groove and the outside of the box.

[0029] By adopting the technical scheme, the collected cooling liquid in the liquid collecting groove can be discharged to the outside of the box through the liquid discharge hole, so that the probability of the collected cooling liquid overflowing into the accommodation cavity due to excessive amount of the collected cooling liquid in the liquid collecting groove is effectively reduced.

[0030] In some embodiments, the inner bottom wall of the liquid collecting groove is inclined, and the lowest part of the inclined surface is provided with the liquid discharge hole along the direction of gravity; and / or, the liquid containing structure is arranged in an inclined manner, so that the liquid discharge hole is located at the lowest part of the liquid collecting groove along the direction of gravity.

[0031] By adopting the technical scheme, the collected cooling liquid in the liquid collecting groove can flow to the liquid discharge hole at the lowest part along the direction of gravity, so that the discharging effect of the cooling liquid discharged to the outside of the box is effectively improved, and the probability of the residual cooling liquid is reduced.

[0032] In some embodiments, the battery device further comprises a battery management system, the liquid leakage detection assembly further comprises an electronic valve, the electronic valve is blocked at the liquid discharge hole; the electronic valve is electrically connected to the battery management system, and the electronic valve is configured to be opened under the control of the battery management system to connect the liquid discharge hole to the outside of the box.

[0033] By adopting the technical scheme, the electronic valve is used to control the opening and closing of the liquid discharge hole, the battery management system can control the opening of the electronic valve, so that the liquid discharge hole is connected to the outside of the box, and the coolant in the coolant containing structure can be discharged to the outside of the box through the liquid discharge hole, so as to reduce the probability of overflow caused by excessive coolant in the coolant containing structure.

[0034] In a second aspect, the embodiments of the present application also provide a power utilization device, comprising the battery device as described above, and the battery device is used to provide electric energy.

[0035] The power utilization device provided by the embodiments of the present application comprises the battery device as described above, and the stability of the power utilization device is better on the basis that the battery device can detect the liquid leakage in time. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or related technical descriptions will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative effort on the basis of these drawings.

[0037] Figure 1 A structural schematic diagram of a vehicle provided by the embodiments of the present application is shown in the figure;

[0038] Figure 2 An exploded view of the battery device provided by the embodiments of the present application is shown in the figure;

[0039] Figure 3 A disassembled structural schematic diagram of the battery monomer provided by the embodiments of the present application is shown in the figure;

[0040] Figure 4 A distribution structural schematic diagram of the battery monomer and the thermal management assembly provided by the embodiments of the present application is shown in the figure;

[0041] Figure 5 A partial enlarged schematic diagram of A in the figure is shown in the figure; Figure 4

[0042] Figure 6 A structural schematic diagram of the battery monomer provided by the embodiments of the present application is shown in the figure, which is arranged between the side beams on both sides;

[0043] Figure 7 A partial enlarged schematic diagram of A in the figure is shown in the figure; Figure 6 ​a local enlarged view of B in FIG. 1;

[0044] Figure 8 a sectional view of the edge beam and the liquid containing structure.

[0045] In the drawings:

[0046] 1000, vehicle;

[0047] 100, battery device; 200, controller; 300, motor;

[0048] 10, case; 101, accommodating cavity; 11, first case; 12, second case; 111, edge beam; 111a, first surface; 111b, second surface; 1111, through hole; 112, main body portion; 113, connecting portion;

[0049] 20, battery cell; 21, end cover; 21a, electrode terminal; 22, case; 23, electrode assembly; 23a, tab;

[0050] 30, thermal management assembly; 31, thermal management component; 32, current collector; 33, connecting pipe body;

[0051] 40, liquid leakage detection assembly; 41, first liquid leakage sensing member; 42, second liquid leakage sensing member; 43, liquid level sensor; 44, electronic valve;

[0052] 50, battery management system;

[0053] 60, liquid containing structure; 601, liquid collecting groove; 61, liquid discharge hole;

[0054] 70, sampling line;

[0055] X, first direction; Y, second direction; Z, gravity direction. DETAILED DESCRIPTION

[0056] Embodiments of the present application are described in detail below with reference to the attached drawings, which are meant to be exemplary and not limiting. The embodiments described below are examples of how the application can be implemented and are not intended to limit the application.

[0057] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0058] In addition, the terms "first", "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise explicitly specified and limited.

[0059] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood broadly, for example, it can be fixed connection, or detachable connection, or integral; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0060] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, as well as industrial equipment and aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0061] With the charging and discharging cycle of the battery device, the battery device will continuously generate heat. In order to reduce the influence of heat, a thermal management component is arranged inside the battery device, and the cooling effect of heat exchange is achieved by introducing cooling liquid into the thermal management component. However, during the flow of the cooling liquid in the thermal management component, the cooling liquid may leak from the connection of the thermal management component. In the related art, it is difficult to detect the occurrence of liquid leakage, so that the battery device is affected by the leakage of the cooling liquid and the risk of insulation failure occurs.

[0062] Based on the above considerations, in order to solve the problem of difficulty in timely detection of coolant leakage in the thermal management components inside the battery device, a battery device is designed. A first leakage sensor is installed at the connection between the thermal management component and the current collector inside the battery device, and / or a second leakage sensor is installed at the connection between the connecting pipe and the current collector. When leakage occurs at the connection between the thermal management component and the current collector, and / or when leakage occurs at the connection between the connecting pipe and the current collector, the leaked coolant overflows from the connection between the thermal management component and the current collector. This allows the first and second leakage sensors to detect the leaking coolant in a timely manner and determine that a leakage has occurred. Consequently, the battery device with leaking coolant can be dealt with promptly, effectively reducing the impact of the leaking coolant on the battery device.

[0063] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0064] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0065] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0066] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0067] Please refer toFigure 2 , Figure 2 An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 referred to in embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0068] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells 20.

[0069] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells 20 into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0070] In some embodiments, the battery device can be a battery pack including a box 10 and one or more battery cell assemblies housed in the box 10.

[0071] As an example, the battery cell assembly can be a battery module, which can be housed in the box 10 by fixing the battery module in the box 10.

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

[0073] As an example, the box 10 can include a first box 11 and a second box 12. The first box 11 and the second box 12 are fastened so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first box 11 can be a top cover or a bottom plate.

[0074] As an example, the box 10 can include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected with the frame so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly.

[0075] In some embodiments, the box 10 can be part of the chassis structure of a vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0076] The technical solutions described in embodiments of the present application are applicable to various electric devices using battery cells 20, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0077] In the embodiments of the present application, the battery cell 20 can be a secondary battery, which refers to a battery cell 20 that can be activated by charging after discharging to continue to be used.

[0078] The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., and the present application is not limited thereto.

[0079] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell 20 provided by some embodiments of the present application is shown. The battery cell 20 refers to the smallest unit that constitutes a battery device. As Figure 3 , the battery cell 20 includes an end cover 21, a shell 22, an electrode assembly 23, and other functional components.

[0080] The end cover 21 refers to a component that covers the opening of the shell 22 to isolate the internal environment of the battery cell 20 from the external environment; the shape of the end cover 21 can be adapted to the shape of the shell 22 to fit the shell 22. Optionally, the end cover 21 can be made of a material with certain hardness and strength (such as aluminum alloy), so that the end cover 21 is not easy to deform when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the safety performance can also be improved. The end cover 21 can be provided with functional components such as an electrode terminal 21a. The electrode terminal 21a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electrical energy of the battery cell 20. In some embodiments, the end cover 21 can also be provided with a pressure relief mechanism for relieving the internal pressure of the battery cell 20 when the internal pressure or temperature reaches a threshold value. The material of the end cover 21 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 21, which can be used to isolate the electrical connection components in the shell 22 from the end cover 21 to reduce the risk of short circuit. For example, the insulating piece can be plastic, rubber, etc.

[0081] The shell 22 is a component for fitting the end cover 21 to form an internal environment of the battery cell 20, wherein the formed internal environment can be used to accommodate the electrode assembly 23, the cooling liquid and other components. The shell 22 and the end cover 21 can be independent components, and an opening can be provided on the shell 22, and the end cover 21 is used to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21 and the shell 22 can also be integrated, specifically, the end cover 21 and the shell 22 can form a common connecting surface before other components are put into the shell, and when it is necessary to seal the internal environment of the shell 22, the end cover 21 is used to cover the shell 22. The shell 22 can be of various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 22 can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 22 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0082] The electrode assembly 23 is a component in which electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained in the shell 22. The electrode assembly 23 is mainly formed by winding or stacking the positive electrode sheet and the negative electrode sheet, and a separator is usually provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have a portion with active material constituting the main body of the electrode assembly, and a portion without active material constituting the tab 23a of each of the positive electrode sheet and the negative electrode sheet. The positive electrode tab and the negative electrode tab can be located at one end of the main body together or at two ends of the main body respectively. In the charging and discharging process of the battery device 100, the positive active material and the negative active material react with the cooling liquid, and the tab 23a is connected to the electrode terminal 21a to form a current loop.

[0083] According to some embodiments of the present application, with reference to Figure 2 , Figure 4 and Figure 5The battery device 100 provided by the embodiments of the present application comprises a box body 10, a plurality of battery monomers 20, a thermal management assembly 30, and a leakage detection assembly 40 for detecting the leakage of the cooling liquid. The box body 10 is internally provided with a containing cavity 101, and the plurality of battery monomers 20 are sequentially arranged in the containing cavity 101 along a first direction X. The thermal management assembly 30 comprises thermal management components 31, current collectors 32, connecting pipe bodies 33, and cooling liquid. At least two thermal management components 31 are arranged at intervals along the first direction X, and the battery monomers 20 are arranged between the adjacent two thermal management components 31. The battery monomers 20 are heat-exchangeably connected with the thermal management components 31. Along a second direction Y, the opposite ends of each thermal management component 31 are respectively connected with the current collectors 32, and the current collectors 32 on the same side of the adjacent two thermal management components 31 along the second direction Y are connected through the connecting pipe bodies 33. The first direction X is perpendicular to the second direction Y. The leakage detection assembly 40 comprises at least one of a first leakage sensing member 41 and a second leakage sensing member 42. The first leakage sensing member 41 is arranged at the connection position of the thermal management component 31 and the current collector 32, and the second leakage sensing member 42 is arranged at the connection position of the connecting pipe body 33 and the current collector 32. The first leakage sensing member 41 and the second leakage sensing member 42 are used for detecting whether the cooling liquid leaks.

[0084] The battery device 100 comprises a plurality of battery monomers 20. Optionally, the plurality of battery monomers 20 can be sequentially arranged in the containing cavity 101 along the first direction X. The first direction X can be any direction, for example, the length direction of the box body 10, the width direction of the box body 10, etc.

[0085] Along the first direction X, the battery monomers 20 are arranged between the adjacent two thermal management components 31. In this way, the battery monomers 20 on the opposite sides along the first direction X can be heat-exchanged through the corresponding thermal management components 31 to achieve the cooling effect.

[0086] The battery monomers 20 are heat-exchangeably connected with the thermal management components 31. Optionally, the battery monomers 20 and the thermal management components 31 can be abutted to achieve heat exchange. Alternatively, a heat-conducting adhesive layer can be arranged between the battery monomers 20 and the thermal management components 31, and the heat exchange can be achieved by bonding through the heat-conducting adhesive layer. Alternatively, a heat-conducting pad can be arranged between the battery monomers 20 and the thermal management components 31, and the heat exchange and the buffering effect can be simultaneously achieved through the heat-conducting pad.

[0087] Exemplarily, in some embodiments, the plurality of battery cells 20 can be arranged in multiple rows along the first direction X, for example, two rows, three rows, etc., and the multiple rows of battery cells 20 can be arranged and distributed along the second direction Y. In this way, each column of battery cells 20 in the multiple rows is distributed on both sides along the first direction X. The second direction Y is perpendicular to the first direction X, and can be the length direction of the box 10, the width direction of the box 10, etc.

[0088] The heat management assembly 30 refers to an assembly structure for forming heat exchange with the battery cells 20. The heat management assembly 30 includes the heat management component 31, the current collector 32, and the connecting pipe 33. The heat management component 31 refers to a component for the internal flow of the cooling liquid for heat exchange. The heat management component 31 can be, but is not limited to, a heat exchange plate, a heat exchange pipe, a harmonica pipe, etc.

[0089] The current collector 32 refers to a structure for introducing or discharging the cooling liquid into or out of the heat management component 31. Specifically, the heat management component 31 is usually provided with multiple flow channels for the cooling liquid. The current collector 32 is used to distribute the cooling liquid to the multiple flow channels or to concentrate the cooling liquid in the multiple flow channels. In the second direction Y, the opposite ends of each heat management component 31 are connected to the current collectors 32. Thus, one end of the heat management component 31 is connected to the current collector 32 for introducing the cooling liquid, and the opposite end of the heat management component 31 is connected to the current collector 32 for discharging the cooling liquid. Thus, the flow of the cooling liquid in the heat management component 31 can be achieved to achieve the purpose of heat exchange and cooling.

[0090] The connecting pipe 33 refers to a pipe structure for connecting adjacent two current collectors 32. The multiple current collectors 32 on the same side of the plurality of battery cells 20 along the second direction Y are connected in sequence by the connecting pipe 33. Thus, the connecting pipe 33 can sequentially introduce the cooling liquid into the multiple current collectors 32, and the cooling liquid can be sequentially introduced into the corresponding heat management components 31 by the multiple current collectors 32 to achieve the purpose of heat exchange and cooling. Alternatively, the cooling liquid in each heat management component 31 can be discharged into the connecting pipe 33 through the current collector 32, and then collected and discharged by the connecting pipe 33 for cooling circulation.

[0091] The liquid leakage detection assembly 40 refers to an assembly structure for detecting the liquid leakage. The liquid leakage detection assembly 40 includes at least one of the first liquid leakage sensing member 41 and the second liquid leakage sensing member 42. Alternatively, in some embodiments, the liquid leakage detection assembly 40 can only include the first liquid leakage sensing member 41, or the liquid leakage detection assembly 40 can only include the second liquid leakage sensing member 42; or in another embodiment, the liquid leakage detection assembly 40 can include both the first liquid leakage sensing member 41 and the second liquid leakage sensing member 42.

[0092] The first liquid leakage sensor 41 refers to a sensor for sensing the coolant. Optionally, the first liquid leakage sensor 41 includes, but is not limited to, an electric conductivity sensor, a capacitance sensor, a voltage sensor, a current sensor, a resistance sensor, etc., through which the presence of the coolant can be effectively detected for judging the leakage of the coolant.

[0093] The first liquid leakage sensor 41 is arranged at the connection between the thermal management component 31 and the current collector 32. Optionally, the first liquid leakage sensor can be connected to at least one of the thermal management component 31 and the current collector 32 by means of bonding, clamping, sleeving, etc., and can cover at least part of the connection, so that when the connection between the thermal management component 31 and the current collector 32 leaks, the first liquid leakage sensor 41 can timely sense the leaked coolant to judge the leakage.

[0094] Optionally, the first liquid leakage sensor 41 can be arranged in any shape, for example, in a block structure, a ring structure, a plate structure, an arc structure, etc. Exemplarily, in some embodiments, the first liquid leakage sensor 41 can be arranged in an arc structure, so that the first liquid leakage sensor 41 can be attached to the surface of the connection below the thermal management component 31 and the current collector 32.

[0095] It should be understood that the number of the thermal management components 31 is multiple, and each thermal management component 31 has a current collector 32 connected to each opposite end. The first liquid leakage sensor 41 can be arranged at the connection between each thermal management component 31 and the corresponding current collector 32, so as to comprehensively monitor the connection between each thermal management component 31 and the corresponding current collector 32. Meanwhile, the detection result of the first liquid leakage sensor 41 at the corresponding position can be used to judge the position where the leakage occurs, so as to facilitate the subsequent maintenance and repair work.

[0096] The second liquid leakage sensor 42 refers to a sensor for sensing the coolant. Optionally, the second liquid leakage sensor 42 includes, but is not limited to, an electric conductivity sensor, a capacitance sensor, a voltage sensor, a current sensor, a resistance sensor, etc., through which the presence of the coolant can be effectively detected for judging the leakage of the coolant.

[0097] The second liquid leakage sensor 42 is arranged at the connection between the connecting pipe body 33 and the current collector 32. Optionally, the second liquid leakage sensor 42 can be connected to at least one of the connecting pipe body 33 and the current collector 32 by means of bonding, clamping, sleeving, etc., and can cover at least part of the connection, so that when the connection between the connecting pipe body 33 and the current collector 32 leaks, the second liquid leakage sensor 42 can timely sense the leaked coolant to judge the leakage.

[0098] Optionally, the second liquid leakage sensing member 42 can be arranged in any shape, for example, can be a block structure, a ring structure, a plate structure, an arc structure, etc. Exemplarily, in some embodiments, the second liquid leakage sensing member 42 can be arranged in an arc structure, so that the second liquid leakage sensing member 42 can be attached to the surface of the connection between the connecting pipe body 33 and the current collector 32.

[0099] It should be understood that the plurality of current collectors 32 located on the same side of the plurality of battery monomers 20 along the second direction Y are connected in sequence by the connecting pipe body 33, so that the second liquid leakage sensing member 42 can be arranged at the connection between each current collector 32 and the connecting pipe segment, so as to comprehensively monitor the connection between each current collector 32 and the corresponding connecting pipe body 33. At the same time, the detection result of the second liquid leakage sensing member 42 at the corresponding position can determine the position of the corresponding liquid leakage, so as to facilitate subsequent maintenance and repair work.

[0100] The battery device 100 provided by the embodiment of the present application can effectively improve the timeliness of detection, so as to facilitate timely processing of the battery device 100 with leaked cooling liquid, and thus can effectively reduce the influence of the leaked cooling liquid on the battery device 100.

[0101] Please refer to Figure 2 , Figure 4 and Figure 5 In the gravity direction Z, the first liquid leakage sensing member 41 is located below the heat management component 31 and the current collector 32, and / or the second liquid leakage sensing member 42 is located below the connecting pipe body 33 and the current collector 32; wherein the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0102] The first liquid leakage sensing member 41 is located below the heat management component 31 and the current collector 32; when the liquid leakage occurs at any position of the connection between the heat management component 31 and the current collector 32, the leaked cooling liquid can flow downward under the action of gravity, so that the probability of the downward flowing cooling liquid flowing through the first liquid leakage sensing member 41 is greater, so that the first liquid leakage sensing member 41 can more accurately sense the liquid leakage occurring at the connection between the heat management component 31 and the current collector 32.

[0103] Optionally, the first liquid leakage sensing member 41 can be directly connected to the surface of at least one of the thermal management component 31 and the current collector 32, or the first liquid leakage sensing member 41 can also be arranged below at least one of the thermal management component 31 and the current collector 32.

[0104] And / or, the second liquid leakage sensing member 42 is located below the connection between the connection pipe body 33 and the current collector 32; thus, when liquid leakage occurs at any position of the connection between the connection pipe body 33 and the current collector 32, the leaked cooling liquid can flow downward under the action of gravity, so that the probability of the downward flowing cooling liquid flowing through the second liquid leakage sensing member 42 is greater, so that the second liquid leakage sensing member 42 can more accurately sense the liquid leakage occurring at the connection between the connection pipe body 33 and the current collector 32.

[0105] Optionally, the second liquid leakage sensing member 42 can be directly connected to the surface of at least one of the connection pipe body 33 and the current collector 32, or the second liquid leakage sensing member 42 can also be arranged below at least one of the connection pipe body 33 and the current collector 32.

[0106] The gravity direction Z is the direction of the gravity when the battery device 100 is installed to the power consumption device. The gravity direction Z can be perpendicular to the first direction X and the second direction Y; in some embodiments, the height direction of the box body 10 can be arranged to be parallel to the gravity direction Z, the first direction X can be parallel to the length direction of the box body 10, and the second direction Y can be parallel to the width direction of the box body 10. In another embodiment, the gravity direction Z can be parallel to one of the first direction X and the second direction Y.

[0107] In this way, when liquid leakage occurs at the connection between the thermal management component 31 and the current collector 32, the leaked cooling liquid will flow downward under the action of gravity, so that the probability of the downward flowing cooling liquid being detected by the first liquid leakage sensing member 41 located below is higher; and / or, when liquid leakage occurs at the connection between the connection pipe body 33 and the current collector 32, the leaked cooling liquid will flow downward under the action of gravity, so that the probability of the downward flowing cooling liquid being detected by the second liquid leakage sensing member 42 located below is higher; thus, the influence of the leaked cooling liquid on the battery device 100 can be further reduced.

[0108] Please refer to Figure 4 and Figure 5 In some embodiments, the battery device 100 further comprises a battery management system 50, and the liquid leakage detection assembly 40 is electrically connected to the battery management system 50.

[0109] The battery management system 50 (Battery Management System, BMS) refers to an electronic system for monitoring and managing the performance of the battery device 100, ensuring its safe and efficient operation. The battery management system 50 has a battery monitoring function (voltage monitoring, current detection, temperature monitoring, etc.), which is electrically connected to the battery monomer 20 by a sampling wire harness or a flexible circuit board structure to achieve the purpose of sampling monitoring. The battery management system 50 also has a charging control function, a discharging control function, a protection function (overvoltage protection, undervoltage protection, overtemperature protection, overcurrent protection, short circuit protection), etc.

[0110] The battery management system 50 is accommodated in the accommodation cavity 101; optionally, the battery management system 50 can be arranged at any position in the accommodation cavity 101, for example, in the first direction X, the battery management system 50 can be arranged at the outermost end of the plurality of arranged battery monomers 20.

[0111] The battery management system 50 is electrically connected to the battery monomer 20, so that the battery management system 50 can realize the monitoring, charging and discharging control and protection control of the battery monomer 20.

[0112] The liquid leakage detection assembly 40 is electrically connected to the battery management system 50; optionally, when the liquid leakage detection assembly 40 includes the first liquid leakage sensing piece 41, the first liquid leakage sensing piece 41 is electrically connected to the battery management system 50, for example, through a wire harness or a flexible circuit board structure to form an electrical connection. In this way, the first liquid leakage sensing piece 41 can send the detected liquid leakage condition to the battery management system 50 in the form of an electrical signal, so that the battery management system 50 can respond in time, for example, to issue a warning message, or to cut off the charging and discharging circuit of the battery monomer 20, etc., to reduce the harm caused by the liquid leakage condition to the battery device 100.

[0113] When the liquid leakage detection assembly 40 includes the second liquid leakage sensing piece 42, the second liquid leakage sensing piece 42 is electrically connected to the battery management system 50, for example, through a wire harness or a flexible circuit board structure to form an electrical connection. In this way, the second liquid leakage sensing piece 42 can send the detected liquid leakage condition to the battery management system 50 in the form of an electrical signal, so that the battery management system 50 can respond in time, for example, to issue a warning message, or to cut off the charging and discharging circuit of the battery monomer 20, etc., to reduce the harm caused by the liquid leakage condition to the battery device 100.

[0114] In this way, by electrically connecting the liquid leakage detection assembly 40 to the battery management system 50, when the liquid leakage detection assembly 40 detects a liquid leakage condition, the liquid leakage detection assembly 40 can transmit an electrical signal to the battery management system 50, so that the battery management system 50 can obtain the liquid leakage signal in time, thereby improving the response speed of the battery device 100 to the liquid leakage condition.

[0115] Referring to Figure 4 and Figure 5 In some embodiments, the battery device 100 further comprises a sampling line 70 electrically connecting the liquid leakage detection assembly 40 and the battery management system 50.

[0116] The sampling line 70 can refer to a conductive line for realizing electrical connection to obtain signals or data.

[0117] The liquid leakage detection assembly 40 is electrically connected to the battery management system 50, so that the electrical connection between the liquid leakage detection assembly 40 and the battery management system 50 can be realized, and the monitoring signal of the liquid leakage detection assembly 40 can be transmitted to the battery management system 50 through the sampling line 70.

[0118] It should be understood that in some embodiments, the sampling line 70 should include a conductive inner core part for electrical connection and an insulating outer layer part wrapped around the conductive inner core, the conductive inner core part is used to connect the liquid leakage detection assembly 40 and the battery management system 50 to realize electrical connection, and the insulating outer layer part is used to realize insulation protection in the accommodation cavity 101.

[0119] Optionally, when the liquid leakage detection assembly 40 includes one of the first liquid leakage sensing member 41 and the second liquid leakage sensing member 42, the sampling line 70 is used to electrically connect the battery management system 50 and the first liquid leakage sensing member 41 or the second liquid leakage sensing member 42; when the liquid leakage detection assembly 40 includes both the first liquid leakage sensing member 41 and the second liquid leakage sensing member 42, the first liquid leakage sensing member 41 and the second liquid leakage sensing member 42 can form electrical connection with the battery management system 50 through corresponding sampling lines 70, respectively.

[0120] The sampling line 70 can be routed in the accommodation cavity 101; for example, in some embodiments, the sampling line 70 can extend along the first direction X or along the second direction Y to realize regular wiring, so as to improve the regularity inside the accommodation cavity 101 to improve the utilization of internal space.

[0121] In this way, the sampling line 70 is used to realize the electrical connection between the liquid leakage detection assembly 40 and the battery management system 50, and the wiring of the sampling line 70 is more flexible, so as to facilitate the utilization of space inside the accommodation cavity 101; at the same time, the sampling line 70 is convenient for insulation treatment, so as to effectively reduce the risk of short circuit of the electrical connection between the liquid leakage detection assembly 40 and the battery management system 50.

[0122] Referring to Figure 4 and Figure 5 In some embodiments, the first liquid leakage sensing member 41 is connected to at least one of the thermal management component 31 and the current collector 32, and the first liquid leakage sensing member 41 is arranged at the connection between at least part of the thermal management component 31 and the current collector 32.

[0123] In the embodiment, the first liquid leakage sensing member 41 can be connected to at least one of the thermal management component 31 and the current collector 32; alternatively, the first liquid leakage sensing member 41 can be connected to at least one of the thermal management component 31 and the current collector 32 by means of adhesion, buckle connection, sleeve connection, etc. For example, the first liquid leakage sensing member 41 can be adhered to both the thermal management component 31 and the current collector 32.

[0124] Meanwhile, the first liquid leakage sensing member 41 is arranged at at least a portion of the connection between the thermal management component 31 and the current collector 32; in this way, when the connection between the thermal management component 31 and the current collector 32 has a liquid leakage, the leaked cooling liquid, whether flowing along the thermal management component 31 or the current collector 32, can have a higher probability of contacting the first liquid leakage sensing member 41, so as to more accurately identify the liquid leakage.

[0125] In this way, when the connection between the thermal management component 31 and the current collector 32 has a liquid leakage, the leaked cooling liquid, whether flowing along the thermal management component 31 or the current collector 32, can be sensed by the first liquid leakage sensing member 41, so as to improve the sensing accuracy of the first liquid leakage sensing member 41.

[0126] Please refer to Figure 4 and Figure 5 In some embodiments, the second liquid leakage sensing member 42 is connected to at least one of the connecting pipe body 33 and the current collector 32, and the second liquid leakage sensing member 42 is arranged at at least a portion of the connection between the connecting pipe body 33 and the current collector 32.

[0127] In the embodiment, the second liquid leakage sensing member 42 is arranged to be connectable to at least one of the connecting pipe body 33 and the current collector 32; alternatively, the second liquid leakage sensing member 42 can be connected to at least one of the connecting pipe body 33 and the current collector 32 by means of adhesion, buckle connection, sleeve connection, etc. For example, the second liquid leakage sensing member 42 can be adhered to both the connecting pipe body 33 and the current collector 32.

[0128] Meanwhile, the second liquid leakage sensing member 42 is arranged at at least a portion of the connection between the connecting pipe body 33 and the current collector 32; in this way, when the connection between the connecting pipe body 33 and the current collector 32 has a liquid leakage, the leaked cooling liquid, whether flowing along the connecting pipe body 33 or the current collector 32, can have a higher probability of contacting the second liquid leakage sensing member 42, so as to more accurately identify the liquid leakage.

[0129] In this way, when leakage occurs at the connection between the connecting pipe body 33 and the current collector 32, the leaked cooling liquid can flow along either the connecting pipe body 33 or the current collector 32, and can be sensed by the second leakage sensing member 42, thereby improving the sensing accuracy of the second leakage sensing member 42.

[0130] For reference, please refer to Figures 5 to 7 In some embodiments, the battery device 100 further comprises a liquid containing structure 60 arranged in the accommodating cavity 101, and the liquid containing structure 60 is provided with a liquid collecting groove 601. In the second direction Y, the liquid containing structure 60 is arranged on at least one side of the plurality of battery monomers 20, and in the gravity direction Z, the liquid collecting groove 601 is located below the current collector 32 and the connecting pipe body 33.

[0131] The liquid containing structure 60 refers to a structure for containing leaked cooling liquid. Optionally, the liquid containing structure 60 can be, but is not limited to, a box structure, a basin structure, etc. The liquid containing structure 60 can be fixedly connected to the wall surface of the box body 10, or connected to the current collector 32 or the thermal management component 31, etc. Alternatively, the liquid containing structure 60 can be a slot structure provided on the box body 10, etc. The liquid collecting groove 601 is a groove structure provided on the liquid containing structure 60. Optionally, the liquid collecting groove 601 can be, but is not limited to, a circular groove, a rectangular groove, a polygonal groove, etc.

[0132] For example, in some embodiments, the liquid containing structure 60 can be a box structure, and the internal cavity of the box structure is the liquid collecting groove 601, which is used to contain the leaked cooling liquid. Alternatively, in other embodiments, the liquid containing structure 60 can also be formed by providing the liquid collecting groove 601 on part of the box body 10, and the leaked cooling liquid can drop into the liquid collecting groove 601 to achieve the containing effect.

[0133] In the second direction Y, the liquid containing structure 60 is arranged on at least one side of the plurality of battery monomers 20. Optionally, the liquid containing structure 60 can be arranged only on one side of the plurality of battery monomers 20 along the second direction Y. Alternatively, the liquid containing structure 60 can be arranged on both opposite sides of the plurality of battery monomers 20 along the second direction Y.

[0134] In the gravity direction Z, the liquid collecting groove 601 is located below the current collector 32 and the connecting pipe body 33. In this way, when leakage occurs between the current collector 32 and the thermal management component 31, or between the current collector 32 and the connecting pipe, the leaked cooling liquid can drop into the liquid collecting groove 601 of the liquid containing structure 60 below under the action of gravity, so that the leaked cooling liquid can be contained in the liquid containing structure 60, thereby reducing the probability of short circuit caused by the flow of cooling liquid in the box body 10.

[0135] In this way, when the connection between the current collector 32 and the thermal management component 31 leaks the cooling liquid, or when the connection between the current collector 32 and the connecting pipe body 33 leaks the cooling liquid, the leaked cooling liquid can drip into the liquid collection groove 601 of the liquid container structure 60 below to be collected, thereby effectively reducing the probability of internal battery cells 20 being short-circuited by the leaked cooling liquid.

[0136] For reference Figures 5 to 7 In some embodiments, in the gravity direction Z, the projection of the connection between the current collector 32 and the thermal management component 31 is located within the projection range of the liquid collection groove 601, and the projection of the connection between the connecting pipe body 33 and the current collector 32 is located within the projection range of the corresponding liquid collection groove 601.

[0137] In this embodiment, by setting the projection of the connection between the current collector 32 and the thermal management component 31 in the gravity direction Z to be located within the projection range of the liquid collection groove 601, and setting the projection of the connection between the connecting pipe body 33 and the current collector 32 in the gravity direction Z to be located within the projection range of the corresponding liquid collection groove 601; thereby, when the connection between the current collector 32 and the thermal management component 31 leaks the cooling liquid, or when the connection between the current collector 32 and the connecting pipe body 33 leaks the cooling liquid, the probability of the leaked cooling liquid dripping into the liquid collection groove 601 is higher.

[0138] In this way, the liquid collection groove 601 of the liquid container structure 60 can further improve the accommodation rate of the leaked cooling liquid, thereby further reducing the probability of the cooling liquid spreading in the box 10, and further reducing the probability of internal battery cells 20 being short-circuited by the leaked cooling liquid.

[0139] For reference Figures 5 to 7 In some embodiments, the liquid leakage detection assembly 40 further includes a liquid level sensor 43 arranged in the liquid collection groove 601 and used to detect the liquid level height of the cooling liquid; and the battery device 100 further includes a battery management system 50, and the liquid level sensor 43 is electrically connected to the battery management system 50.

[0140] The liquid level sensor 43 refers to a sensing device used to measure the surface height of a liquid. Optionally, the liquid level sensor 43 includes but is not limited to a float-type liquid level sensing structure, a capacitive liquid level sensing structure, a conductive liquid level sensing structure, etc.

[0141] The liquid level sensor 43 is arranged in the liquid collection groove 601 of the liquid container structure 60, for example, the liquid level sensor 43 can be assembled on the inner side wall surface of the liquid collection groove 601; the liquid level sensor 43 is used to monitor the liquid surface height of the cooling liquid contained in the liquid collection groove 601 to determine the leakage amount of the cooling liquid.

[0142] The liquid level sensor 43 is electrically connected to the battery management system 50; in this way, the liquid level sensor 43 can transmit the monitored liquid level information of the coolant to the battery management system 50, so that the battery management system 50 can determine the amount or condition of the leakage according to the liquid level information of the coolant monitored by the liquid level sensor 43. For example, in some embodiments, the leakage degree can be determined according to the change of the liquid level of the coolant within a preset time.

[0143] In this way, the liquid level sensor 43 can detect the liquid level of the coolant in the liquid collection groove 601 of the liquid containing structure 60, so as to determine the amount of the leaked coolant and achieve the purpose of determining the leakage degree.

[0144] Please refer to Figures 5 to 7 In some embodiments, the box body 10 includes two edge beams 111 spaced apart along the second direction Y, and the plurality of battery monomers 20 are arranged between the two edge beams 111; the edge beam 111 includes a main body part 112 and a connecting part 113, and the connecting part 113 is arranged on the side of the main body part 112 facing the accommodation cavity 101 along the second direction Y; the connecting part 113 includes a first surface 111a facing the accommodation cavity 101 along the gravity direction Z, and the liquid containing structure 60 is arranged on the first surface 111a.

[0145] The edge beam 111 refers to the beam structure of the box body 10 at the edges on the opposite sides in the second direction Y. Optionally, the edge beam 111 can be a profiled beam, an extruded aluminum beam, or the like.

[0146] The edge beam 111 includes a main body part 112 and a connecting part 113; it can be understood that the main body part 112 and the connecting part 113 refer to two parts of the edge beam 111, the part of the edge beam 111 facing outside the accommodation cavity 101 along the second direction Y is the main body part 112, and the other part of the edge beam 111 facing inside the accommodation cavity 101 along the second direction Y is the connecting part 113.

[0147] Optionally, the main body part 112 and the connecting part 113 can be an integral structure; or the main body part 112 and the connecting part 113 can be connected and fixed by welding, fastener locking, or the like.

[0148] The connecting part 113 includes a first surface 111a, which refers to a side wall surface of the connecting part 113 facing the accommodation cavity 101 along the gravity direction Z.

[0149] The liquid containing structure 60 is arranged on the first surface 111a; optionally, the liquid containing structure 60 can be overlapped or abutted on the first surface 111a to form a supporting effect; or the liquid containing structure 60 can be fixed and assembled on the first surface 111a by adhesion, locking connection, buckle connection, or the like.

[0150] In this way, the liquid containing structure 60 can be arranged on the first surface 111a of the connecting portion 113, so as to improve the assembly stability of the liquid containing structure 60.

[0151] It should be understood that Figure 5 , Figure 7 and Figure 8 In some embodiments, at least part of the current collector 32 is located above the first surface 111a in the second direction Y, and a gap is formed between the current collector 32 and the first surface 111a; the liquid containing structure 60 is arranged between the first surface 111a and the current collector 32 and connected to the first surface 111a.

[0152] At least part of the current collector 32 is located above the first surface 111a; optionally, the heat management component 31 can extend to the part located above the first surface 111a in the second direction Y, and the current collector 32 is connected to the end of the heat management component 31 in the second direction Y, so that the current collector 32 is located above the first surface 111a; or when the heat management component 31 extends in the second direction Y but is not arranged above the first surface 111a, the current collector 32 is connected to the end of the heat management component 31 in the second direction Y, and part of the current collector 32 can also extend to be located above the first surface 111a.

[0153] In the embodiment, the liquid containing structure 60 is arranged between the first surface 111a and the current collector 32, and the liquid containing structure 60 is connected to the first surface 111a. In this way, the liquid containing structure 60 located below the current collector 32 can more fully collect the leaked cooling liquid at the current collector 32, and can effectively improve the collection effect of the liquid collecting groove 601 of the liquid containing structure 60 on the leaked cooling liquid of the current collector 32, and reduce the probability of the leaked cooling liquid flowing into the accommodating cavity 101.

[0154] It should be understood that Figures 5 to 7 In some embodiments, the main body portion 112 includes a second surface 111b in the second direction Y and towards the accommodating cavity 101, the second surface 111b is connected to the first surface 111a, and one side of the liquid containing structure 60 abuts against the second surface 111b.

[0155] The second surface 111b refers to a side wall surface of the main body portion 112 in the second direction Y and towards the accommodating cavity 101. It should be understood that the second surface 111b and the first surface 111a are intersected, so that the second surface 111b can be connected with the first surface 111a. For example, in some embodiments, the second surface 111b and the first surface 111a can be vertically distributed; or in another embodiment, the included angle between the second surface 111b and the first surface 111a can be an obtuse angle.

[0156] One side of the liquid-containing structure 60 abuts against the second surface 111b, and the liquid-containing structure 60 is also disposed on the first surface 111a; thus, the liquid-containing structure 60 is connected to both the first surface 111a and the second surface 111b of the main body 112, thereby improving the assembly stability of the liquid-containing structure 60. At the same time, since the liquid-containing structure 60 also abuts against the second surface 111b, when leaked coolant slides onto the second surface 111b, the coolant can slide down along the second surface 111b and fall into the liquid-containing structure 60.

[0157] With this configuration, the liquid-containing structure 60 can abut against the second surface 111b. When leaked coolant drips onto the second surface 111b, the second surface 111b can guide the coolant into the liquid-containing structure 60, thereby further reducing the probability of leaked coolant causing a short circuit in the internal battery cell 20.

[0158] Please refer to Figures 5 to 8 In some embodiments, a drain hole 61 is provided on the bottom wall of the liquid-containing structure 60, and the drain hole 61 connects the liquid collection tank 601 and the outside of the box 10.

[0159] The drain hole 61 refers to a hole that is formed on the bottom wall of the liquid-containing structure 60 and has a through structure; in this way, the coolant contained in the liquid-containing structure 60 can be discharged to the outside of the liquid-containing structure 60 through the drain hole 61.

[0160] The number of drainage holes 61 can be one or more; the drainage holes 61 can be distributed at any point on the bottom wall of the liquid-containing structure 60.

[0161] The drain hole 61 connects the collection tank 601 and the outside of the housing 10; thus, when leaked coolant is collected in the collection tank 601, the coolant can be discharged to the outside of the housing 10 through the drain hole 61, thereby reducing the risk of excessive coolant accumulation in the collection tank 601 and overflowing into the receiving cavity 101.

[0162] Optionally, the drain hole 61 can be connected to the outside of the housing 10 by means of a slot structure or opening structure provided on the housing 10 that connects to the outside of the housing 10.

[0163] For example, in some embodiments, a through hole 1111 can be formed on the housing 10, and the through hole 1111 can connect to the outside of the housing 10; for example, the through hole 1111 can be formed on the first surface 111a, one end of the through hole 1111 connects from the first surface 111a to the receiving cavity 101, and the other end of the through hole 1111 connects from the outer surface of the main body 112 to the outside of the housing 10, with one end of the through hole 1111 facing the drain hole 61; in this way, the coolant contained in the liquid-containing structure 60 can be introduced into the through hole 1111 through the drain hole 61, and discharged to the outside of the housing 10 through the through hole 1111.

[0164] Optionally, the path of the through hole 1111 through the side beam 111 can be a straight line, so that the coolant can be directly discharged to the outside of the housing 10 through the through hole 1111; or, the path of the through hole 1111 through the side beam 111 can be a curve or a polyline, so that the internal space of the through hole 1111 can be used for liquid storage to provide a certain degree of sealing.

[0165] With this configuration, the coolant collected in the collection tank 601 can be discharged to the outside of the housing 10 through the drain hole 61, thereby effectively reducing the probability of excessive coolant overflowing into the receiving cavity 101.

[0166] Please refer to Figures 5 to 8 In some embodiments, the inner bottom wall of the liquid collection tank 601 is an inclined surface, and a drain hole 61 is provided at the lowest point of the inclined surface along the direction of gravity Z; and / or, the liquid holding structure 60 is inclined so that the drain hole 61 is located at the lowest point of the liquid collection tank 601 along the direction of gravity.

[0167] In this embodiment, the inner bottom wall of the liquid collection tank 601 can be sloped, so that the coolant collected in the liquid collection tank 601 can converge downwards along the slope.

[0168] Meanwhile, the drain hole 61 is set at the lowest point of the inclined plane along the direction of gravity Z, so that the coolant collected in the collection tank 601 can converge to the drain hole 61 to facilitate the discharge of coolant in the collection tank 601.

[0169] And / or, in this embodiment, the liquid-containing structure 60 may be inclined so that the drain hole 61 is located at the lowest point of the liquid collection tank 601 along the gravity direction Z; thereby, the coolant collected in the liquid collection tank 601 can converge to the drain hole 61 to facilitate the discharge of coolant in the liquid collection tank 601.

[0170] With this configuration, the coolant collected in the collection tank 601 can flow through the inclined surface to the drain hole 61, thereby effectively improving the discharge effect of coolant to the outside of the housing 10 and reducing the probability of coolant residue.

[0171] Please refer to Figures 5 to 8 In some embodiments, the battery device 100 further comprises a battery management system 50, and the liquid leakage detection assembly 40 further comprises an electronic valve 44, which is arranged on the first surface 111a and blocks the liquid discharge hole 61; the electronic valve 44 is electrically connected to the battery management system 50, and the electronic valve 44 is configured to be opened under the control of the battery management system 50 to open the liquid discharge hole 61 to the outside of the box 10.

[0172] In some embodiments, the electronic valve 44 is used to block the liquid discharge hole 61, and the electronic valve 44 is electrically connected to the battery management system 50. In this way, the battery management system 50 can control the electronic valve 44 to be opened to open the liquid discharge hole 61 and the through hole 1111 to realize the liquid discharge function; or the battery management system 50 can control the electronic valve 44 to be closed to block the liquid discharge hole 61, so that the leaked cooling liquid continues to be accommodated in the liquid containing structure 60.

[0173] Optionally, in some embodiments, the electronic valve 44 can be arranged on the first surface 111a and block the liquid discharge hole 61; or in other embodiments, the electronic valve 44 can be arranged in the liquid discharge hole 61 and used to block the liquid discharge hole 61.

[0174] In this way, the opening and closing of the liquid discharge hole 61 can be controlled by using the electronic valve 44, and the battery management system 50 can control the electronic valve 44 to be opened, so that the liquid discharge hole 61 is opened to the outside of the box 10, and the cooling liquid accommodated in the liquid containing structure 60 can be discharged to the outside of the box 10 through the liquid discharge hole 61, so as to reduce the probability of overflow caused by excessive accommodation of the cooling liquid in the liquid containing structure 60.

[0175] In the following, the battery device 100 provided by the present application will be further introduced according to specific embodiments.

[0176] Please refer to Figures 4 to 8 In the present embodiment, the battery device 100 comprises a box 10, a battery management system 50, a plurality of battery monomers 20, a thermal management assembly 30, a liquid leakage detection assembly 40 and a liquid containing structure 60, the box 10 is internally provided with an accommodation cavity 101, the plurality of battery monomers 20 are accommodated in the accommodation cavity 101, and the battery management system 50 is arranged at one end of the plurality of battery monomers 20 along a first direction X.

[0177] The thermal management assembly 30 comprises a thermal management component 31, a current collector 32, a connecting pipe body 33 and a cooling liquid, at least one side of each thermal management component 31 is provided with a battery monomer 20 along the first direction X, opposite ends of each thermal management component 31 are connected to the current collector 32 along a second direction Y, and a plurality of current collectors 32 located on the same side of the plurality of battery monomers 20 along the second direction Y are sequentially connected by the connecting pipe body 33.

[0178] The leakage detection assembly 40 comprises a first leakage sensing part 41, a second leakage sensing part 42 and a liquid level sensor 43; the first leakage sensing part 41 is arranged at the connection position of the thermal management component 31 and the current collector 32, and the second leakage sensing part 42 is arranged at the connection position of the connecting pipe body 33 and the current collector 32. In the gravity direction Z, the first leakage sensing part 41 is located below the thermal management component 31 and the current collector 32, and the second leakage sensing part 42 is located below the connecting pipe body 33 and the current collector 32; wherein the first direction X, the second direction Y and the gravity direction Z are perpendicular to each other.

[0179] The box body 10 comprises two side beams 111 arranged at intervals along the second direction Y, and the plurality of battery monomers 20 are arranged between the two side beams 111; the side beam 111 comprises a main body part 112 and a connecting part 113, and the connecting part 113 is arranged at the side of the main body part 112 facing the accommodating cavity 101 along the second direction Y; the connecting part 113 comprises a first surface 111a facing the inside of the accommodating cavity 101 along the gravity direction Z, the main body part 112 comprises a second surface 111b facing the inside of the accommodating cavity 101 along the second direction Y, the second surface 111b is connected to the first surface 111a, the liquid containing structure 60 is arranged on the first surface 111a, and one side of the liquid containing structure 60 abuts on the second surface 111b. The liquid level sensor 43 is arranged in the liquid containing structure 60, and the liquid level sensor 43 is electrically connected to the battery management system 50.

[0180] The bottom wall of the liquid containing structure 60 is provided with a liquid discharge hole 61, the first surface 111a is provided with a through hole 1111, one end of the through hole 1111 is opposite to the liquid discharge hole 61, and the other end of the through hole 1111 is communicated to the outside of the box body 10; the leakage detection assembly 40 further comprises an electronic valve 44, and the electronic valve 44 is blocked in the liquid discharge hole 61; the electronic valve 44 is electrically connected to the battery management system 50, and the electronic valve 44 is configured to be opened to connect the liquid discharge hole 61 to the outside of the box body 10 under the control of the battery management system 50.

[0181] Please refer to Figure 1 and Figure 2 The application also provides a power utilization device comprising the battery device 100.

[0182] The power utilization device provided by the application, for example, the vehicle 1000, comprises the battery device 100, and the stability of the power utilization device is better on the basis that the battery device 100 can timely detect the leakage condition.

[0183] The above is only a preferred embodiment of the application, and is not intended to limit the application. Any modification, equivalent replacement and improvement made within the spirit and principle of the application shall be included in the protection scope of the application.

Claims

1. A battery device, characterized by: The battery device comprises a box body internally provided with a containing cavity; a plurality of battery cells accommodated in the containing cavity; a thermal management assembly comprising thermal management components, a current collector, a connecting pipe body and a cooling liquid configured to flow in the thermal management components, the current collector and the connecting pipe body; at least two of the thermal management components are arranged in a first direction, the battery cells are arranged between adjacent two of the thermal management components, and the battery cells are in heat exchangeable connection with the thermal management components; in a second direction, opposite ends of each of the thermal management components are respectively connected to the current collector, and the current collectors on the same side of adjacent two of the thermal management components in the second direction are connected by the connecting pipe body, the first direction being perpendicular to the second direction; and a liquid leakage detection assembly comprising at least one of a first liquid leakage sensing member arranged at a connection between the thermal management components and the current collector and a second liquid leakage sensing member arranged at a connection between the connecting pipe body and the current collector, the first liquid leakage sensing member and the second liquid leakage sensing member being used for detecting whether the cooling liquid leaks. In a gravity direction, the first liquid leakage sensing member is located below the thermal management components and the current collector, and / or the second liquid leakage sensing member is located below the connecting pipe body and the current collector; wherein the first direction, the second direction and the gravity direction are perpendicular to each other.

2. The battery device of claim 1, wherein: The battery device further comprises a battery management system accommodated in the containing cavity, the battery management system being in electrical connection with the battery cells; the liquid leakage detection assembly is electrically connected to the battery management system.

3. The battery device of claim 1, wherein: The battery device further comprises a sampling line electrically connecting the liquid leakage detection assembly and the battery management system.

4. The battery device of claim 3, wherein: The first liquid leakage sensing member is connected to at least one of the thermal management components and the current collector, and covers at least part of the connection between the thermal management components and the current collector; 5. The battery device according to any one of claims 1 to 4, characterized by: and / or the second liquid leakage sensing member is connected to at least one of the connecting pipe body and the current collector, and covers at least part of the connection between the connecting pipe body and the current collector. The battery device further comprises a liquid containing structure arranged in the containing cavity, the liquid containing structure being provided with a liquid collecting groove, in the second direction, the liquid containing structure is arranged on at least one side of the plurality of battery cells, in the gravity direction, the liquid collecting groove is located below the current collector and the connecting pipe body.

6. The battery device of claim 2, wherein: In the gravity direction, a projection of the connection between the current collector and the thermal management components is located within a projection range of the liquid collecting groove, and / or a projection of the connection between the connecting pipe body and the current collector is located within the projection range of the liquid collecting groove.

7. The battery device of claim 6, wherein: The liquid leakage detection assembly further comprises a liquid level sensor arranged in the liquid collecting groove and used for detecting a liquid level height of the cooling liquid; the battery device further comprises a battery management system, the liquid level sensor being electrically connected to the battery management system.

8. The battery device of claim 6, wherein: ​ 9. The battery device of claim 6, wherein: The box includes two side beams spaced apart along the second direction, and the plurality of battery cells are arranged between the two side beams; the side beam includes a main body portion and a connecting portion, and the connecting portion is arranged on a side of the main body portion facing the accommodation cavity along the second direction; the connecting portion includes a first surface facing the accommodation cavity along the direction of gravity, and the liquid containment structure is arranged on the first surface.

10. The battery device of claim 9, wherein: At least part of the current collector is located above the first surface along the second direction, and a gap is formed between the current collector and the first surface; the liquid containment structure is arranged between the first surface and the current collector and is connected to the first surface.

11. The battery device of claim 9, wherein: The main body portion includes a second surface facing the accommodation cavity along the second direction, and the second surface is connected to the first surface, and one side of the liquid containment structure abuts on the second surface.

12. The battery device according to any one of claims 7 to 11, characterized by: A drain hole is arranged on a bottom wall of the liquid containment structure, and the drain hole is in communication with the liquid collection groove and the outside of the box.

13. The battery device of claim 12, wherein: An inner bottom wall of the liquid collection groove is inclined, and the lowest part of the inclined surface is arranged with the drain hole along the direction of gravity; and / or the liquid containment structure is arranged to be inclined, so that the drain hole is located at the lowest part of the liquid collection groove along the direction of gravity.

14. The battery device of claim 12, wherein: The battery device further includes a battery management system; the liquid leakage detection assembly further includes an electronic valve, and the electronic valve is blocked at the drain hole; the electronic valve is electrically connected to the battery management system, and the electronic valve is configured to be opened to open the drain hole to the outside of the box under the control of the battery management system.

15. An electrical device, comprising: The battery device includes any one of the battery devices according to claims 1 to 14, and is used to provide electric energy.

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