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 battery single body assembly, a first heat management component and a second heat management component, and the battery single body assembly comprises a plurality of battery single bodies which are sequentially arranged in the second direction; in the first direction, the first heat management part and the second heat management part are respectively arranged on two opposite sides of the battery monomer assembly and are respectively close to or connected with a plurality of battery monomers in the battery monomer assembly; according to the battery device provided by the embodiment of the invention, the first heat management component and the second heat management component can be jointly used for carrying out heat exchange cooling treatment on the battery monomers, so that when the battery device operates at a high rate, the temperature rise of the battery monomers is effectively controlled, and the reliability of the battery device in the high-rate operation state is better.

Description

TECHNICAL FIELD

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

[0002] Batteries are widely used in vehicles to provide power for driving the vehicles. In order to meet the high power demand of the vehicles, the batteries are generally used as the power source of the vehicles.

[0003] The battery device includes a box body and a plurality of battery monomers arranged in the box body. When the battery device is operated at a high rate, a large amount of heat is generated by the battery monomers inside. Therefore, how to dissipate heat from the battery monomers to meet the high-rate operation requirement of the battery device is a problem to be solved. CONTENT OF THE UTILITY MODEL

[0004] The purpose of the embodiments of the present application is to provide a battery device and a power utilization device, which aims to solve the problem of heat dissipation requirement when the battery device is operated at a high rate.

[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 includes a battery monomer assembly, a first heat management component and a second heat management component. The battery monomer assembly includes a plurality of battery monomers arranged in a second direction. In a first direction, the first heat management component is arranged on one side of the battery monomer assembly and is close to or connected to the plurality of battery monomers in the battery monomer assembly. In the first direction, the second heat management component is arranged on the opposite side of the battery monomer assembly and is close to or connected to the plurality of battery monomers in the battery monomer assembly. The first direction is perpendicular to the second direction.

[0007] The embodiments of the present application have the following beneficial effects: The battery device provided by the embodiments of the present application arranges the first heat management component and the second heat management component on the opposite sides of the battery monomer assembly in the first direction respectively, and utilizes the first heat management component and the second heat management component to simultaneously form heat exchange and cooling processing on the plurality of battery monomers in the battery monomer assembly on the opposite sides of the battery monomer assembly, so as to effectively improve the heat dissipation efficiency of the battery monomers. Therefore, when the battery device is operated at a high rate, the temperature rise of the battery monomers is effectively controlled, and the reliability of the battery device under the high-rate operation state is further optimized.

[0008] In some embodiments, the battery device further includes a box body, the box body includes a frame, the first heat management component is arranged at one end of the frame, and the second heat management component is arranged at the opposite end of the frame. The frame, the first heat management component and the second heat management component jointly enclose a containing cavity, and the battery monomer assembly is accommodated in the containing cavity.

[0009] By adopting the technical scheme, the first thermal management component and the second thermal management component are respectively arranged at opposite ends of the frame and enclose the frame to form the accommodating cavity, that is, the first thermal management component and the second thermal management component can act as the heat dissipation structure on the battery monomer assembly and can also act as the sealing plate structure to seal the frame, so that the structure of the battery device can be simplified, and the cost and weight of the battery device can be reduced.

[0010] In some embodiments, the battery monomer includes a shell, in the first direction, the shell has opposite first and second walls, at least part of the first wall is connected to the first thermal management component, and at least part of the second wall is connected to the second thermal management component.

[0011] By adopting the technical scheme, at least part of the first wall and at least part of the second wall of the shell of the battery monomer are connected to the first thermal management component and the second thermal management component, respectively, to improve the heat exchange cooling effect of the first thermal management component and the second thermal management component on the battery monomer.

[0012] In some embodiments, the battery device further includes a protection assembly arranged on the first thermal management component.

[0013] By adopting the technical scheme, when the first thermal management component is impacted from the outside, the protection assembly can protect the battery monomer to reduce the probability of damage to the battery monomer.

[0014] In some embodiments, the first thermal management component includes a first plate body and a second plate body, the first plate body is recessed to form a first flow channel portion away from the second plate body, the second plate body is connected to the first plate body and encloses the first flow channel portion to form a first heat exchange flow channel, the first flow channel portion is connected to the first wall, and a spacing space is formed between the first plate body and the first wall; the protection assembly includes a support member arranged in the spacing space, and the support member is connected to the first plate body and the first wall.

[0015] By adopting the technical scheme, the first heat exchange flow channel can be filled with a heat exchange medium to realize heat exchange and heat dissipation, and the first flow channel portion is connected to the first wall, so that the heat exchange effect of the heat exchange medium flowing in the first heat exchange flow channel through the first flow channel portion and the first wall is better; and the spacing space is formed between the first wall and the first plate body, the support member is arranged in the spacing space and supports and protects the battery monomer, so that the space utilization rate inside the accommodating cavity is higher, and the energy density of the battery device is also higher.

[0016] In some embodiments, the battery monomer further comprises two electrode terminals, the two electrode terminals are arranged on the first wall in a third direction, the third direction is perpendicular to the first direction and the second direction; the battery device further comprises a busbar component, the busbar component is used to electrically connect two electrode terminals adjacent in the second direction in the battery monomer assembly; the protection assembly further comprises a first buffer, the first buffer is arranged in the spacing space, and the first buffer is connected to the first plate body and the busbar component.

[0017] By adopting the above technical scheme, the two electrode terminals of the battery monomer are arranged on the first wall, and the busbar component can be used to electrically connect two electrode terminals adjacent in the second direction in the same battery monomer assembly to realize series connection or parallel connection between the battery monomers; meanwhile, the first buffer is arranged in the spacing space and connected to the first plate body and the busbar component, and the first buffer can be used to buffer and protect the busbar component and the electrode terminal, so as to reduce the probability of damage of the busbar component and the battery monomer; and the first buffer can be arranged in the redundant space between the first plate body and the first wall, the arrangement of the first buffer does not need to occupy the use space in the first direction in the accommodation cavity, the space utilization inside the accommodation cavity is higher, and thus the energy density of the battery device is also higher.

[0018] In some embodiments, the battery device further comprises a sampling assembly, the sampling assembly comprises a plurality of circuit boards, the circuit boards are arranged on either side of the busbar component in the third direction, and the circuit boards are located between the first buffer and the first wall; the circuit boards are electrically connected to adjacent busbar components through a conductive structure.

[0019] By adopting the above technical scheme, the circuit boards are used to electrically connect adjacent busbar components to achieve the sampling purpose, and the first buffer can buffer and protect the circuit boards to reduce the probability of damage of the circuit boards.

[0020] In some embodiments, at least one of the plurality of circuit boards is bent in the third direction to form a bent structure, and a gap is formed in the middle of the bent structure; the protection assembly further comprises a second buffer, the second buffer is arranged in the gap and supported on the bent structure.

[0021] By adopting the above technical scheme, the circuit board is bent in the third direction to form a bent structure, the occupied space of the circuit board in the third direction is reduced, and the second buffer is arranged in the internal gap of the bent structure, and the second buffer is used to support the circuit board to reduce the probability of breakage of the circuit board.

[0022] In some embodiments, the sampling assembly further comprises a spacer, the spacer comprising a first spacer portion, a second spacer portion, and a third spacer portion; the first spacer portion is disposed between the first wall and the circuit board, and is configured to separate the circuit board and the first wall; the second spacer portion is disposed at at least one end of the first spacer portion in the third direction, and abuts the busbar component, and projections of the busbar component in the third direction are all located on the second spacer portion; the third spacer portion is disposed on the second spacer portion, and is located between the busbar component and the first wall.

[0023] By adopting the above technical solution, the first spacer portion can be used to separate the circuit board and the first wall, so as to reduce the probability of short circuit between the circuit board and the first wall; the second spacer portion is used to separate and protect the busbar component, so as to reduce the probability of short circuit between the busbar component and the circuit board; and the third spacer portion is used to separate the busbar component and the first wall, so as to reduce the probability of short circuit between the first wall and the busbar component.

[0024] In some embodiments, the battery monomer further comprises a pressure relief mechanism disposed on the first wall; the pressure relief mechanism faces the space.

[0025] By adopting the above technical solution, the pressure relief mechanism can be disposed on the first wall, and when thermal runaway occurs inside the battery monomer, the pressure relief mechanism can discharge the thermal runaway gas into the space, so as to reduce the probability of combustion and explosion of the battery monomer.

[0026] In some embodiments, the support has an exhaust passage with an opening formed therein, at least one end of the exhaust passage penetrates through the support in the second direction and communicates to the outside of the support, and the pressure relief mechanism of each battery monomer in the battery monomer assembly is communicated to the opening.

[0027] By adopting the above technical solution, when thermal runaway occurs inside the battery monomer, the pressure relief mechanism and the opening of the support can discharge the thermal runaway gas into the exhaust passage, so that the thermal runaway gas can be discharged along the exhaust passage, thereby reducing the probability of thermal runaway spreading.

[0028] In some embodiments, the first thermal management component is provided with an insulating layer on a side wall surface of the battery monomer assembly.

[0029] By adopting the above technical solution, the insulating layer is used to insulate and protect the side wall surface of the battery monomer assembly facing the first thermal management component, so as to reduce the probability of short circuit between the battery monomer and the first thermal management component.

[0030] In some embodiments, the first thermal management component is provided with a protective layer on a side wall surface of the battery monomer assembly.

[0031] By adopting the technical scheme, the protective layer is arranged on the side wall surface of the first thermal management component away from the battery monomer assembly, so that the anti-impact capability of the first thermal management component is further improved.

[0032] In some embodiments, the second thermal management component comprises a third plate body and a fourth plate body, the third plate body is recessed away from the fourth plate body to form a second flow channel part, and the fourth plate body is connected to the third plate body and encloses the second flow channel part to form a second heat exchange flow channel.

[0033] By adopting the technical scheme, the fourth plate body encloses the second flow channel part to form the second heat exchange flow channel for the heat exchange medium to flow, so that the second wall is connected to the fourth plate body, and the heat exchange medium flowing in the second heat exchange flow channel exchanges heat with the second wall through the fourth plate body, so as to achieve the purpose of dissipating heat for the battery monomer.

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

[0035] The power consumption device provided by the embodiments of the present application comprises the battery device as described above, and the reliability of the power consumption device is better in the case that the reliability of the battery device as described above is better in the high-rate operation state. 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 description will be briefly introduced. 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.

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

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

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

[0040] Figure 4 The internal sectional view of the battery device provided by the embodiments of the present application is shown in the figure;

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

[0042] Figure 6 ​A schematic view of an arrangement of a battery monomer assembly provided by an embodiment of the present application;

[0043] Figure 7 An internal cross-sectional view of a battery monomer assembly provided by an embodiment of the present application;

[0044] Figure 8 A schematic view of a first heat management component provided by an embodiment of the present application; Figure 7 A partial enlarged view of B of FIG. 1;

[0045] Figure 9 A partial enlarged view of C of FIG. 1; Figure 7 A partial enlarged view of C of FIG. 1;

[0046] Figure 10 An exploded view of a first heat management component provided by an embodiment of the present application.

[0047] In the drawings, various reference numbers refer to the following:

[0048] 1000, vehicle;

[0049] 100, battery device; 110, battery monomer assembly; 200, controller; 300, motor;

[0050] 10, box body; 101, containing cavity; 101a, spacing space; 11, frame; 12, first heat management component; 120, first heat exchange flow channel; 121, first plate body; 121a, first flow channel part; 122, second plate body; 13, second heat management component; 130, second heat exchange flow channel; 131, third plate body; 131a, second flow channel part; 132, fourth plate body;

[0051] 20, battery monomer; 21, shell; 21a, end cover; 21b, shell body; 211, first wall; 211a, electrode terminal; 212, second wall; 22, pressure relief mechanism; 23, electrode assembly; 23a, tab;

[0052] 30, protection assembly; 31, support; 31a, opening; 311, exhaust passage; 32, first buffer; 33, second buffer;

[0053] 40, current collecting component;

[0054] 50, sampling assembly; 51, circuit board; 511, bending structure; 511a, gap; 52, isolation piece; 521, first isolation part; 522, second isolation part; 523, third isolation part;

[0055] 60, insulation layer; 70, protection layer;

[0056] Z, first direction; X, second direction; Y, third direction. DETAILED DESCRIPTION

[0057] The embodiments of the present application are described below in detail, examples of which are shown in the drawings, wherein the same or similar notations represent the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary, and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0058] In the description of the present application, it is to be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0059] In addition, the terms "first", "second" are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined with "first", "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "a plurality of" is two or more, unless otherwise explicitly specified and limited.

[0060] 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.

[0061] 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 water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0062] For example, the battery is used to provide power for the vehicle. Moreover, in order to meet the high power demand of the vehicle, the battery is generally used as the power source of the vehicle. The battery device includes a box body and a plurality of battery monomers arranged in the box body. When the battery device is operated at high rate, for example, in the working condition of fast charging, a large amount of heat will be generated in the battery monomers inside the battery device. Therefore, how to dissipate heat from the battery monomers to meet the high rate operation requirement of the battery device is a problem to be solved.

[0063] Based on the above considerations, in order to solve the problem of heat dissipation of the battery device operated at high rate, a battery device is designed. By arranging the first heat management component and the second heat management component on the opposite sides of the battery monomer assembly along the first direction respectively, the first heat management component and the second heat management component act on the battery monomer assembly and perform heat exchange and heat dissipation operation on the plurality of battery monomers in the battery monomer assembly, so as to effectively improve the heat dissipation effect of the battery monomers. Therefore, when the battery device is operated at high rate, the temperature rise of the battery monomers can be effectively controlled, and the reliability of the battery device under the high rate operation state is better.

[0064] The battery monomer disclosed in the embodiments of the present application can be used in a power consumption device using the battery device as a power source or a variety of energy storage systems using the battery device as an energy storage element. The power consumption device can be, but is not limited to, a mobile phone, a tablet computer, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include fixed or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric plane toys, etc. The spacecraft can include airplanes, rockets, space shuttles, and spaceships, etc.

[0065] The following embodiments are described for convenience with a power consumption device of an embodiment of the present application as an example of a vehicle 1000.

[0066] Please refer to Figure 1 , Figure 1 The structural schematic diagram of the vehicle 1000 provided by some embodiments of the present application is shown. The vehicle 1000 can be a fuel car, a gas car or a new energy car, and the new energy car can be a pure electric car, a hybrid car or an extended range car, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as the operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

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

[0068] Please refer to Figure 2 , Figure 2 An exploded view of the battery device 100 is provided for some embodiments of the present application. The battery device 100 mentioned in the embodiments of the present application can include one or more battery cell assemblies 110 for providing voltage and capacity. The battery cell assembly 110 can include a plurality of battery cells 20 connected in series, in parallel, or in a mixed connection through a busbar component.

[0069] In some embodiments, the battery cell assembly 110 is generally formed by arranging a plurality of battery cells 20.

[0070] As an example, the battery cell assembly 110 can be a battery module formed by arranging and fixing a plurality of battery cells 20 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 20 with a cable tie.

[0071] In some embodiments, the battery device can be a battery pack including a box 10 and one or more battery cell assemblies 110, which are accommodated in the box 10.

[0072] As an example, the battery cell assembly 110 can be a battery module, which can be accommodated in the box 10 by fixing the battery module in the box 10.

[0073] As an example, the battery cell assembly 110 can also be accommodated in the box 10 by directly fixing a plurality of battery cells 20 in the box 10.

[0074] As an example, the box 10 can include a first box and a second box. The first box and the second box are buckled so that an enclosed space is formed inside the box 10 to accommodate the battery cell assembly 110. Here, enclosed means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0075] 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 110.

[0076] In some embodiments, the box 10 can be part of the chassis structure of the vehicle 1000. For example, part of the box 10 can be at least part of the floor of the vehicle 1000, or part of the box 10 can be at least part of the cross beam and the longitudinal beam of the vehicle 1000.

[0077] The technical solutions described in the embodiments of the present application are applicable to various electric devices using the battery cell 20, such as a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship, and a spacecraft, such as an aircraft, a rocket, a space shuttle, and a spacecraft.

[0078] 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.

[0079] 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, and the like, and the present application is not limited thereto.

[0080] Please refer to Figure 3 , Figure 3 The exploded structural diagram of the battery cell 20 is provided for some embodiments of the present application. The battery cell 20 refers to the smallest unit that constitutes the battery device 100. As Figure 3 , the battery cell 20 includes an end cover 21a, a shell 21b, an electrode assembly 23, and other functional components.

[0081] The end cover 21a refers to a component that covers the opening of the shell 21b to isolate the internal environment of the battery cell 20 from the external environment. Without limitation, the shape of the end cover 21a can be adapted to the shape of the shell 21b to fit the shell 21b. Alternatively, the end cover 21a can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 21a is not easily deformed when subjected to extrusion and collision, so that the battery cell 20 can have higher structural strength, and the reliability can also be improved. The end cover 21a can be provided with functional components such as an electrode terminal 211a. The electrode terminal 211a can be used to electrically connect with the electrode assembly 23 for outputting or inputting the electric energy of the battery cell 20. In some embodiments, the end cover 21a can also be provided with a pressure relief mechanism for relieving the internal pressure when the internal pressure or temperature of the battery cell 20 reaches a threshold value. The material of the end cover 21a can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, and the like. In some embodiments, an insulating piece can also be provided on the inner side of the end cover 21a, which can be used to isolate the electrical connection components in the shell 21b from the end cover 21a to reduce the risk of short circuit. Exemplarily, the insulating piece can be plastic, rubber, and the like.

[0082] The shell 21b is a component for cooperating with the end cover 21a to form an internal environment of the battery cell 20, and the formed internal environment can be used to accommodate the electrode assembly 23, the electrolyte and other components. The shell 21b and the end cover 21a can be independent components, and an opening can be provided on the shell 21b, and the end cover 21a is used to cover the opening to form the internal environment of the battery cell 20. Without limitation, the end cover 21a and the shell 21b can also be integrated, specifically, the end cover 21a and the shell 21b can form a common connecting surface before other components enter the shell, and when it is necessary to seal the internal environment of the shell 21b, the end cover 21a is used to cover the shell 21b. The shell 21b can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 21b can be determined according to the specific shape and size of the electrode assembly 23. The material of the shell 21b can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0083] The electrode assembly 23 is a component where electrochemical reactions occur in the battery cell 20. One or more electrode assemblies 23 can be contained in the shell 21b. 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 23, and a portion without active material constituting the tab 23a of the positive electrode sheet and the negative electrode sheet, respectively. The positive electrode tab and the negative electrode tab can be located at one end of the main body or at two ends of the main body, respectively. During the charging and discharging process of the battery, the positive active material and the negative active material react with the electrolyte, and the tab 23a is connected to the electrode terminal 211a to form a current loop.

[0084] According to some embodiments of the present application, referring to Figure 2 , Figure 4 and Figure 5 , the present application provides a battery device 100, comprising a battery cell assembly 110, a first thermal management component 12 and a second thermal management component 13, the battery cell assembly 110 comprises a plurality of battery cells 20 arranged in sequence along a second direction X; in a first direction Z, the first thermal management component 12 is arranged on one side of the battery cell assembly 110, and the first thermal management component 12 is close to or connected to the plurality of battery cells 20 in the battery cell assembly 110; in the first direction Z, the second thermal management component 13 is arranged on the other side of the battery cell assembly 110, and the second thermal management component 13 is close to or connected to the plurality of battery cells 20 in the battery cell assembly 110; wherein the first direction Z is perpendicular to the second direction X.

[0085] The first thermal management component 12 can be used to reduce the temperature of the battery monomer 20, or can be used to increase the temperature of the battery monomer 20. The first thermal management component 12 can be a plate-shaped structure internally formed with a flow channel accommodating a heat exchange medium. The heat exchange medium in the flow channel can be water, air, a mixture of water and ethylene glycol, refrigerant, phase change material, etc. The heat exchange medium can be circulated. In other embodiments, the heat exchange medium can also be a solid, for example, paraffin wax, etc. The heat exchange function can be achieved through the state change of the heat exchange medium. For example, when the paraffin wax changes from solid to liquid, it can absorb heat to achieve the effect of cooling the battery monomer 20. The first thermal management component 12 can also be referred to as a water-cooled plate, a liquid-cooled plate, a heat exchange plate, a temperature regulating plate, etc.

[0086] The second thermal management component 13 can be used to reduce the temperature of the battery monomer 20, or can be used to increase the temperature of the battery monomer 20. The second thermal management component 13 can be a plate-shaped structure internally formed with a flow channel accommodating a heat exchange medium. The heat exchange medium in the flow channel can be water, air, a mixture of water and ethylene glycol, refrigerant, phase change material, etc. The heat exchange medium can be circulated. In other embodiments, the heat exchange medium can also be a solid, for example, paraffin wax, etc. The heat exchange function can be achieved through the state change of the heat exchange medium. For example, when the paraffin wax changes from solid to liquid, it can absorb heat to achieve the effect of cooling the battery monomer 20. The second thermal management component 13 can also be referred to as a water-cooled plate, a liquid-cooled plate, a heat exchange plate, a temperature regulating plate, etc.

[0087] In the first direction Z, the first thermal management component 12 is arranged on one side of the battery monomer assembly 110, and the second thermal management component 13 is arranged on the opposite side of the battery monomer assembly 110. The first direction Z is perpendicular to the second direction X, and the second direction X is the arrangement direction of the battery monomer 20. Thus, the first direction Z is any direction perpendicular to the arrangement direction of the battery monomer 20, and the second direction X can be any direction.

[0088] When the first thermal management component 12 is arranged at one side of the battery cell assembly 110 along the first direction Z, the first thermal management component 12 can simultaneously act on multiple battery cells 20 in the battery cell assembly 110, for example, simultaneously contact or approach all battery cells 20 in the battery cell assembly 110, to achieve simultaneous heat exchange and heat dissipation treatment of each battery cell 20 in the battery cell assembly 110, so that the first thermal management component 12 has a better heat dissipation effect on the battery cell assembly 110. Among them, the battery cell 20 can be arranged close to the first thermal management component 12, that is, a certain gap is formed between the battery cell 20 and the first thermal management component 12; or the battery cell 20 can be in contact with the first thermal management component 12, for example, abutting and the like; or the battery cell 20 can be fixedly connected with the first thermal management component 12 by means of bonding, buckle connection, bracket connection and the like.

[0089] Similarly, when the second thermal management component 13 is arranged at the other side of the battery cell assembly 110 along the first direction Z, the second thermal management component 13 can simultaneously act on multiple battery cells 20 in the battery cell assembly 110, for example, contact or approach all battery cells 20 in the battery cell assembly 110, to achieve simultaneous heat exchange and heat dissipation treatment of each battery cell 20 in the battery cell assembly 110, so that the second thermal management component 13 has a better heat dissipation effect on the battery cell assembly 110. Among them, the battery cell 20 can be arranged close to the second thermal management component 13, that is, a certain gap is formed between the battery cell 20 and the second thermal management component 13; or the battery cell 20 can be in contact with the second thermal management component 13, for example, abutting and the like; or the battery cell 20 can be fixedly connected with the second thermal management component 13 by means of bonding, buckle connection, bracket connection and the like.

[0090] It should be understood that the number of battery cell assemblies 110 can be one group or any multiple groups of more than one group, for example, two groups, three groups and the like; when the number of battery cell assemblies 110 is multiple groups, multiple battery cell assemblies 110 can be arranged between the first thermal management component 12 and the second thermal management component 13, so that the first thermal management component 12 and the second thermal management component 13 can simultaneously act on multiple battery cell assemblies 110.

[0091] The battery device 100 provided by the embodiments of the present application sets the first thermal management component 12 and the second thermal management component 13 on opposite sides of the battery monomer assembly 110 along the first direction Z, simultaneously forms heat exchange cooling treatment on the plurality of battery monomers 20 in the battery monomer assembly 110 on opposite sides of the battery monomer assembly 110 by the first thermal management component 12 and the second thermal management component 13, and thus the heat dissipation efficiency of the battery monomers 20 can be effectively improved. Therefore, when the battery device 100 is operated at high rate, the temperature rise of the battery monomers 20 can be effectively controlled, and thus the reliability of the battery device 100 under the high rate operation state is more optimal.

[0092] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments, the battery device 100 further comprises a box body 10, the box body 10 comprises a frame 11, the first thermal management component 12 is arranged on one end of the frame 11, and the second thermal management component 13 is arranged on the opposite end of the frame 11; the frame 11, the first thermal management component 12 and the second thermal management component 13 jointly form a containing cavity 101, and the battery monomer assembly 110 is contained in the containing cavity 101.

[0093] The frame 11 can be a frame structure formed by connecting a plurality of beam bodies. For example, the frame 11 can be, but is not limited to, a rectangular frame structure, a circular ring frame structure, etc.; in some embodiments, the frame 11 comprises two first beam bodies arranged opposite to each other and two second beam bodies arranged opposite to each other, and the first beam bodies and the second beam bodies are sequentially connected end to end to form a rectangular frame structure. Optionally, a reinforcing beam can be arranged inside the frame 11 to further improve the overall structural strength of the frame 11.

[0094] The first thermal management component 12 and the second thermal management component 13 are arranged on opposite ends of the frame 11 respectively; wherein the first thermal management component 12 can be fixedly connected to one end of the frame 11 by fastening, welding or the like; similarly, the second thermal management component 13 can be fixedly connected to the other end of the frame 11 by fastening, welding or the like.

[0095] In the present embodiment, the first direction Z can be a direction parallel to the inside of the frame 11; when the first thermal management component 12 and the second thermal management component 13 are arranged on opposite ends of the frame 11 along the first direction Z, the first thermal management component 12 and the second thermal management component 13 can be respectively arranged on the opening ends of the opposite ends of the frame 11, so that the first thermal management component 12 and the second thermal management component 13 are arranged on the frame 11 and jointly form the containing cavity 101 inside the frame 11; and the first thermal management component 12 and the second thermal management component 13 arranged on the frame 11 can be combined to form the box body 10.

[0096] It should be understood that the first thermal management component 12 and the second thermal management component 13 are respectively arranged at opposite ends of the frame 11 and form a closed containing cavity 101 for containing the battery cell assembly 110, i.e. without the need of additional sealing plate structure for sealing the frame 11, i.e. the first thermal management component 12 and the second thermal management component 13 can respectively replace the sealing plate structure for sealing the frame 11 and form a sealing protection for the internal battery cell assembly 110.

[0097] In this way, the first thermal management component 12 and the second thermal management component 13 are respectively arranged at opposite ends of the frame 11 and form a containing cavity 101 with the frame 11, i.e. the first thermal management component 12 and the second thermal management component 13 can not only act as a heat dissipation structure for the battery cell assembly 110, but also can act as a sealing plate structure for sealing the frame 11, so as to simplify the structure of the battery device 100, save the assembly steps and material use of the additional sealing plate structure, and thus reduce the cost of the battery device 100 and the overall weight of the battery device 100.

[0098] Please refer to Figure 2 to Figure 5 In some embodiments, the battery cell 20 includes a housing 21, and in the first direction Z, the housing 21 has opposite first and second walls 211 and 212, at least a part of the first wall 211 is connected to the first thermal management component 12, and at least a part of the second wall 212 is connected to the second thermal management component 13.

[0099] The battery cell 20 includes a housing 21, and the housing 21 includes first and second walls 211 and 212; the first wall 211 refers to a side wall surface structure of the housing 21 facing the first thermal management component 12, and exemplarily, the first wall 211 can refer to a side wall surface structure of an end cover 21a of the housing 21 facing the first thermal management component 12, or the first wall 211 can also refer to a side wall surface structure of a shell 21b of the housing 21 facing the first thermal management component 12. The second wall 212 refers to another side wall surface structure of the housing 21 facing the second thermal management component 13, and exemplarily, the second wall 212 can refer to a side wall surface structure of the end cover 21a of the housing 21 facing the second thermal management component 13, or the second wall 212 can also refer to a side wall surface structure of the shell 21b of the housing 21 facing the second thermal management component 13. In some embodiments, the first wall 211 can refer to a side wall surface structure of the end cover 21a facing the first thermal management component 12, and the second wall 212 can refer to a side wall surface structure of the shell 21b facing the second thermal management component 13.

[0100] At least part of the first wall 211 is connected with the first thermal management component 12; the first wall 211 can be partially connected with the first thermal management component 12, for example, the first wall 211 can be a side wall surface of the end cover 21a facing the first thermal management component 12, and the first wall 211 is provided with functional components such as electrode terminals, and thus the part of the first wall 211 without functional components is connected with the first thermal management component 12 by means of thermal conductive glue bonding; or the first wall 211 can be a side wall surface of the shell 21b facing the first thermal management component 12, and the first wall 211 can be integrally bonded to the first thermal management component 12 by means of thermal conductive glue. Alternatively, the first wall 211 can be directly or indirectly connected with the first thermal management component 12 by means of bonding, snap connection, fastener connection, abutting, etc., to achieve heat conduction between the first wall 211 and the first thermal management component 12.

[0101] At least part of the second wall 212 is connected with the second thermal management component 13; the second wall 212 can be partially connected with the second thermal management component 13, for example, the second wall 212 can be a side wall surface of the end cover 21a facing the second thermal management component 13, and the second wall 212 is provided with functional components such as electrode terminals, and thus the part of the second wall 212 without functional components is connected with the second thermal management component 13 by means of thermal conductive glue bonding; or the second wall 212 can be a side wall surface of the shell 21b facing the second thermal management component 13, and the second wall 212 can be integrally bonded to the second thermal management component 13 by means of thermal conductive glue. Alternatively, the second wall 212 can be connected with the second thermal management component 13 by means of bonding, snap connection, fastener connection, abutting, etc., to achieve heat conduction between the second wall 212 and the second thermal management component 13.

[0102] In this way, at least part of the first wall 211 and at least part of the second wall 212 of the shell 21 of the battery monomer 20 are respectively connected with the first thermal management component 12 and the second thermal management component 13, so that the battery monomer 20 is connected with the first thermal management component 12 through the first wall 211, and the battery monomer 20 is connected with the second thermal management component 13 through the second wall 212; therefore, the heat exchange cooling effect of the first thermal management component 12 and the second thermal management component 13 on the battery monomer 20 is effectively improved.

[0103] Please refer to Figure 2 , Figure 4 and Figure 5 In some embodiments, the battery device 100 further comprises a protection assembly 30 arranged on the first thermal management component 12.

[0104] The protection assembly 30 includes, but is not limited to, a support structure (such as a support block, a support plate, a support beam, a support layer, etc.) for forming a support protection, a buffer structure (such as buffer cotton, a buffer block, a buffer plate, a buffer interlayer, etc.) for forming a buffer protection, etc.

[0105] In this way, the first thermal management component 12 is capped at one end of the frame 11 and forms heat exchange and heat dissipation and capping protection for the internal battery cell assembly 110. When an impact or collision occurs outside the battery device 100, the protection assembly 30 can form protection for the first thermal management component 12, thereby improving the protection effect of the first thermal management component 12 on the battery cell 20 to reduce the probability of damage to the battery cell 20.

[0106] For example, in some embodiments, when the battery device 100 is applied to an electric device and used to provide electric energy to the electric device, the battery device 100 is connected to a bearing structure in the electric device, and the exposed part of the battery device 100 can be impacted or collided. Taking a vehicle as an example, the side of the battery device 100 provided with the second thermal management component 13 can be assembled on the vehicle body structure, and thus the side of the battery device 100 provided with the first thermal management component 12 faces away from the vehicle body structure and faces the bottom, and thus the first thermal management component 12 can be impacted or collided. By providing the protection assembly 30 on the first thermal management component 12, the impact or collision working condition can be reduced to affect the inside of the battery device 100.

[0107] Please refer to Figure 2 , Figure 4 , Figure 5 and Figure 10 In some embodiments, the first thermal management component 12 includes a first plate body 121 and a second plate body 122, the first plate body 121 is recessed to form a first flow channel portion 121a away from the second plate body 122, the second plate body 122 is connected to the first plate body 121 and surrounds the first flow channel portion 121a to form a first heat exchange flow channel 120, the first flow channel portion 121a is connected to the first wall 211, and a spacing space 101a is formed between the first plate body 121 and the first wall 211; the protection assembly 30 includes a support 31, the support 31 is arranged in the spacing space 101a, and the support 31 is connected to the first plate body 121 and the first wall 211.

[0108] The first plate body 121 can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, or the like. The first plate body 121 is provided with a first flow channel portion 121a; it should be understood that the first plate body 121 can be processed by stamping, rolling, or the like to form a recessed first flow channel portion 121a, and the first flow channel portion 121a is recessed away from the second plate body 122; thus, when the second plate body 122 is connected to the first plate body 121, the second plate body 122 covers the first flow channel portion 121a of the first plate body 121 to form the first heat exchange flow channel 120. The second plate body 122 can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, or the like.

[0109] The first flow channel portion 121a is connected to the first wall 211; it should be understood that the first plate body 121 is located on one side of the accommodation cavity 101, and thus the outwardly convex outer surface of the first flow channel portion 121a can be connected to the first wall 211. Alternatively, the first flow channel portion 121a can be directly or indirectly in contact with the first wall 211 by adhesion, abutment, buckle connection, or the like; for example, the first flow channel portion 121a can be adhesively fixed to the first wall 211 by a heat-conducting adhesive; thus, the heat exchange medium flowing in the first heat exchange flow channel 120 can directly exchange heat with the first wall 211 through the first flow channel portion 121a, thereby making the first heat management component 12 have a more optimal heat exchange effect on the battery monomer 20.

[0110] It should be understood that the first flow channel portion 121a is outwardly convex away from the second plate body 122, that is, the first flow channel portion 121a is outwardly convex relative to other parts of the first plate body 121; thus, when the first flow channel portion 121a is connected to the first wall 211, a spacing 101a is formed between the first wall 211 and the first plate body 121.

[0111] The protection assembly 30 includes a support 31 for connecting the first plate body 121 and the first wall 211 to achieve support and protection of the battery monomer 20. Alternatively, the support 31 can be, but is not limited to, a support block, a support beam, a support bracket, or the like; the material of the support 31 can be, but is not limited to, mica, glass fiber, carbon fiber, or the like high-temperature-resistant and high-strength material. The support 31 can be connected to the first plate body 121 and the first wall 211 by adhesion, buckle connection, abutment, or the like.

[0112] The number of the support member 31 for supporting the same group of battery cell assemblies 110 can be one or more. For example, in some embodiments, one support member 31 can be used to support a group of battery cell assemblies 110, the length direction of the support member 31 is arranged in the spacing space 101a between the battery cell assembly 110 and the first plate body 121 along the second direction X, one end of the support member 31 is connected to the first plate body 121, and the other end of the support member 31 is connected to the first wall 211 of the battery cell assembly 110 in the group of battery cell assemblies 110; or in other embodiments, two or more support members 31 can be used to support a group of battery cell assemblies 110, the plurality of support members 31 are arranged in the spacing space 101a between the battery cell assembly 110 and the first plate body 121 along the second direction X in sequence, and the support members 31 are connected to the first plate body 121 and the first wall 211 of at least one battery cell 20.

[0113] In this way, the first heat exchange flow channel 120 can be filled with heat exchange medium to achieve heat exchange and heat dissipation effect, and the first flow channel part 121a is connected to the first wall 211, so that the heat exchange medium flowing in the first heat exchange flow channel 120 has better heat exchange effect through the first flow channel part 121a and the first wall 211. There is a spacing space 101a between the first wall 211 and the first plate body 121, and the spacing space 101a is part of the redundant space in the accommodation cavity 101; the support member 31 is arranged in the spacing space 101a and supports the battery cell 20, so that the support member 31 can be arranged in the spacing space 101a without occupying other space of the accommodation cavity 101, the space utilization inside the accommodation cavity 101 is higher, and the energy density of the battery device 100 is also higher.

[0114] Please refer to Figure 2 , Figure 5 and Figure 6 In some embodiments, the battery cell 20 further comprises two electrode terminals 211a, which are arranged on the first wall 211 in the third direction Y perpendicular to the first direction Z and the second direction X; the battery device 100 further comprises a busbar component 40 for electrically connecting two electrode terminals 211a adjacent in the second direction X in the group of battery cell assemblies 110; and the protection assembly 30 further comprises a first buffer member 32 arranged in the spacing space 101a, and the first buffer member 32 is connected to the first plate body 121 and the busbar component 40.

[0115] The third direction Y refers to a direction perpendicular to the first direction Z and the second direction X. In some embodiments, the third direction Y can be, but is not limited to, the length direction of the box body 10, the width direction of the box body 10, etc.

[0116] The busbar component 40 can be, but is not limited to, an electrically conductive sheet structure such as an aluminum sheet, an iron sheet, a copper sheet, a silver sheet, a gold sheet, etc. The busbar component 40 is used to electrically connect two electrode terminals 211a of two adjacent battery monomer assemblies 110 in the second direction X, so that the battery monomers 20 in the battery monomer assembly 110 can be connected in series and / or in parallel. At the same time, the busbar components 40 of two groups of battery monomer assemblies 110 can also be electrically connected by using a conductor structure to achieve electrical connection between the two adjacent groups of battery monomer assemblies 110. It should be understood that the battery monomer 20 includes two electrode terminals 211a; thus, in each group of battery monomer assemblies 110, two rows of busbar components 40 arranged in the second direction X are connected, one row of busbar components 40 is used to electrically connect one row of electrode terminals 211a arranged in the first direction Z, and the other row of busbar components 40 is used to electrically connect the other row of electrode terminals 211a arranged in the first direction Z.

[0117] The protection assembly 30 further includes a first buffer 32; the first buffer 32 is used to connect the first plate body 121 and the busbar component 40 to achieve buffering protection of the busbar component 40 and the electrode terminal 211a. Optionally, the first buffer 32 can be connected with the busbar component 40 by adhesion or abutment; the first buffer 32 can be connected with the first plate body 121 by adhesion or abutment. The first buffer 32 can be, but is not limited to, a buffer block, a buffer plate, a buffer strip, a buffer layer, etc. The material of the first buffer 32 can be, but is not limited to, a material with high toughness such as foam and glass fiber.

[0118] The number of the first buffers 32 used to buffer and protect the busbar components 40 in the same group of battery monomer assemblies 110 can be two or any multiple of two or more. For example, in some embodiments, two first buffers 32 can be used to buffer and protect two rows of busbar components 40 in a group of battery monomer assemblies 110, and the two first buffers 32 are respectively arranged between the two rows of busbar components 40 and the first plate body 121 and are respectively connected with the corresponding busbar components 40 and the first plate body 121; or in another embodiment, more than two first buffers 32 can be used to buffer and protect two rows of busbar components 40 in a group of battery monomer assemblies 110, and two or more first buffers 32 can be arranged between any row of busbar components 40 and the first plate body 121, and the two or more first buffers 32 are sequentially arranged in the interval space 101a between the row of busbar components 40 and the first plate body 121 in the second direction X.

[0119] In this way, the two electrode terminals 211a of the battery cell 20 are arranged on the first wall 211, and the two electrode terminals 211a adjacent in the second direction X in the same group of battery cell assemblies 110 can be connected in electrical connection by the busbar component 40 to achieve series connection or parallel connection between the battery cells 20; meanwhile, the first buffer 32 is arranged in the spacing space 101a and connected to the first plate 121 and the busbar component 40, and the busbar component 40 and the electrode terminal 211a can be buffered and protected by the first buffer 32 to reduce the probability of damage to the busbar component 40 and the battery cell 20; and the first buffer 32 can be arranged in the spacing space 101a between the first plate 121 and the first wall 211, and the spacing space 101a belongs to the redundant space part in the accommodation cavity 101, and the arrangement of the first buffer 32 does not need to occupy additional space in the accommodation cavity 101 in the first direction Z, and the space utilization inside the accommodation cavity 101 is higher, so that the energy density of the battery device 100 is also higher.

[0120] Please refer to Figure 2 、 Figure 5 、 Figure 7 to Figure 9 In some embodiments, the battery device 100 further comprises a sampling assembly 50, the sampling assembly 50 comprises a plurality of circuit boards 51, the circuit boards 51 are arranged on either side of the busbar component 40 in the third direction Y, and the circuit boards 51 are located between the first buffer 32 and the first wall 211; the circuit boards 51 are electrically connected to adjacent busbar components 40 by conductive structures (not shown in the figure).

[0121] The sampling assembly 50 is used to collect current, voltage, temperature and other parameter information of the battery cell 20. The sampling assembly 50 comprises a circuit board 51; the circuit board 51 is a basic assembly for supporting and connecting electronic components, and in some embodiments, the circuit board 51 comprises a plate structure made of insulating material, and a conductive path is formed on the plate structure made of insulating material by laying a conductive metal (such as copper foil, silver foil, gold foil, aluminum foil, etc.); for example, the conductive path can be a detection wire for detecting the voltage of the battery cell 20. Optionally, the circuit board 51 can be a printed circuit board 51 or a flexible circuit board 51; taking the flexible circuit board 51 as an example, the flexible circuit board 51 is more convenient to assemble and arrange.

[0122] The number of the circuit boards 51 is multiple, for example, can be two, three or any multiple of three or more. Exemplarily, in some embodiments, when the number of the battery monomer assemblies 110 is one group, the number of the circuit boards 51 is at least two, for example, two circuit boards 51, one of which is arranged on one side of the two rows of the busbar components 40 arranged on the battery monomer assembly 110, and the circuit board 51 can be electrically connected to the adjacent busbar components 40 through the conductive structure. It should be understood that the conductive structure includes but is not limited to copper sheet, aluminum sheet, nickel sheet and the like. In other embodiments, when the number of the battery monomer assemblies 110 is two or more groups, for example, two groups of the battery monomer assemblies 110 are arranged along the third direction Y; the number of the circuit boards 51 can be three, one of which is arranged between the two rows of the busbar components 40 adjacent to the two groups of the battery monomer assemblies 110 and connected to the adjacent two rows of the busbar components 40 through the conductive structure, and the other two circuit boards 51 are arranged on the sides of the other two rows of the busbar components 40.

[0123] In the third direction Y, the circuit board 51 can be arranged on either side of the corresponding busbar component 40, exemplarily, in the same group of the battery monomer assembly 110, the circuit board 51 can be arranged between the two rows of the busbar components 40 and close to the adjacent busbar components 40, or the circuit board 51 can be arranged on the outside of the two rows of the busbar components 40 and close to the adjacent busbar components 40. It should be understood that when multiple groups of the battery monomer assemblies 110 are arranged along the third direction Y, in the adjacent two groups of the battery monomer assemblies 110, the circuit board 51 can be arranged between the adjacent two rows of the busbar components 40, and only one circuit board 51 can be arranged between the adjacent two rows of the busbar components 40 and connected to the two rows of the busbar components 40.

[0124] The circuit board 51 is located between the first buffer 32 and the first wall 211, so that the first buffer 32 can buffer and protect the circuit board 51 in the first direction Z.

[0125] In this way, the adjacent busbar components 40 are electrically connected by the circuit board 51 to achieve the sampling purpose, and the first buffer 32 can buffer and protect the circuit board 51 to reduce the probability of damage to the circuit board 51.

[0126] Please refer to Figure 2 , Figure 5 , Figure 7 to Figure 9 In some embodiments, at least one of the plurality of circuit boards 51 is bent to form a bent structure 511 along the third direction Y, and the middle part of the bent structure 511 forms a gap 511a; the protection assembly 30 further comprises a second buffer 33 arranged in the gap 511a and supported on the bent structure 511.

[0127] In the present embodiment, the circuit board 51 can be a flexible circuit board 51; thus, the circuit board 51 can be bent to a certain extent without breaking.

[0128] The at least one circuit board 51 is bent along the third direction Y to form a bent structure 511; thus, the circuit board 51 can be bent from a planar flat structure to a three-dimensional structure protruding in the first direction Z. At the same time, since the circuit board 51 is bent along the third direction Y, the space occupied by the circuit board 51 along the third direction Y is effectively reduced. For example, in some embodiments, when the first flow channel portion 121a is connected to the portion of the first wall 211 between the two electrode terminals 211a, the space between the electrode terminal 211a and the first flow channel portion 121a can be insufficient to arrange the circuit board 51, thus the circuit board 51 needs to be arranged on the other side of the electrode terminal 211a away from the first flow channel portion 121a; while the space on the other side of the electrode terminal 211a away from the first flow channel portion 121a, which is opposite to the first wall 211 in the first direction Z, is also limited, thus, when the circuit board 51 is arranged here, the circuit board 51 can be bent along the third direction Y to form a bent structure 511, so that the bent structure 511 occupies less space along the third direction Y, and the circuit board 51 can be smoothly arranged here.

[0129] It should be understood that when the circuit board 51 is bent along the third direction Y to form a bent structure 511, the bent structure 511 will form a gap 511a inside due to the bending, for example, the bent structure 511 is bent to form a U-shaped cross section; by arranging the second buffer 33 in the gap 511a, the second buffer 33 supports the bent structure 511 in the gap 511a and along the first direction Z, to reduce the probability of the bent structure 511 continuing to bend into the gap 511a and causing breakage. Alternatively, the second buffer 33 can be fixed to the bent structure 511 by adhesive means.

[0130] Wherein, the above-mentioned second buffer 33 refers to a component with buffering performance, and the second buffer 33 can include but is not limited to a buffer block, a buffer strip, a buffer bracket, etc. The material of the second buffer 33 can be but is not limited to a material with high toughness such as foam and glass fiber.

[0131] Exemplarily, in some embodiments, when the number of the battery cell assemblies 110 is multiple groups, for example, two groups of the battery cell assemblies 110 are taken as an example for illustration, the two groups of the battery cell assemblies 110 are arranged in sequence along the third direction Y; in the two groups of the battery cell assemblies 110, four columns of the busbar components 40 are arranged in sequence along the third direction Y; wherein the first column of the busbar components 40 is provided with a first circuit board 51 on the side away from the second column of the busbar components 40 along the third direction Y, the first circuit board 51 is electrically connected to the first column of the busbar components 40, and the first circuit board 51 can be bent along the third direction Y to form a bent structure 511; the second column and the third column of the busbar components 40 are provided with a second circuit board 51 therebetween along the third direction Y, and the second circuit board 51 can be arranged in a flat manner and electrically connected to the second column and the third column of the busbar components 40; the last column of the busbar components 40 is provided with a third circuit board 51 on the side away from the third column of the busbar components 40 along the third direction Y, the third circuit board 51 is electrically connected to the last column of the busbar components 40, and the third circuit board 51 can be bent along the third direction Y to form a bent structure 511; as shown in Figure 7 to Figure 9

[0132] In this way, by bending the circuit board 51 along the third direction Y to form the bent structure 511, the occupied space of the circuit board 51 along the third direction Y is reduced, and meanwhile, the second buffer 33 is arranged in the internal gap 511a of the bent structure 511 to support the circuit board 51, so as to reduce the probability of breakage of the circuit board 51.

[0133] Please refer to Figure 2 , Figure 5 , Figure 7 to Figure 9 In some embodiments, the sampling assembly 50 further comprises an isolation piece 52, the isolation piece 52 comprises a first isolation part 521, a second isolation part 522 and a third isolation part 523; the first isolation part 521 is arranged between the first wall 211 and the circuit board 51, and is used for separating the circuit board 51 and the first wall 211; the second isolation part 522 is arranged at at least one end of the first isolation part 521 along the third direction Y, and abuts against the busbar component 40, and the projection of the busbar component 40 along the third direction Y is located on the second isolation part 522; the third isolation part 523 is arranged on the second isolation part 522, and is located between the busbar component 40 and the first wall 211.

[0134] The isolation piece 52 is arranged on the first wall 211, and is used for insulating and separating the circuit board 51, the first wall 211 and the busbar component 40, so as to reduce the probability of short circuit. The isolation piece 52 can be made of high-temperature-resistant insulating materials, such as polyurethane fiber, polyimide, silica gel, fluoroplastic and ceramic materials.

[0135] ​The first isolation portion 521 is arranged between the first wall 211 and the circuit board 51. Optionally, the first isolation portion 521 can be a plate structure, a layer structure, or the like. The first isolation portion 521 can be fixedly attached to the first wall 211, or the first isolation portion 521 can be fixedly attached to the first buffer 32. The first isolation portion 521 is used to separate the circuit board 51 and the first wall 211, so as to reduce the probability of short circuit between the first wall 211 and the circuit board 51.

[0136] The second isolation portion 522 is arranged at at least one end of the first isolation portion 521 in the third direction Y. It should be understood that when one end of the first isolation portion 521 in the third direction Y faces the busbar component 40, the second isolation portion 522 can be arranged at the end of the first isolation portion 521 facing the busbar component 40, as shown in FIG. 5A; when both ends of the first isolation portion 521 in the third direction Y face the busbar component 40, both ends of the first isolation portion 521 are provided with the second isolation portion 522, as shown in FIG. 5B. Figure 8 Figure 9 It should be understood that the second isolation portion 522 is used to insulate and separate the busbar component 40 in the third direction Y. In the third direction Y, the projections of the busbar component 40 are located on the second isolation portion 522, so that the third isolation portion 523 can effectively improve the air gap and the creepage distance between the circuit board 51 and the busbar component 40. The first isolation portion 521 and the second isolation portion 522 can enclose a receiving space for accommodating the circuit board 51, and the probability of short circuit between the circuit board 51 and the first wall 211 and the busbar component 40 is relatively low.

[0137] It should be understood that the second isolation portion 522 is used to insulate and separate the busbar component 40 in the third direction Y. In the third direction Y, the projections of the busbar component 40 are located on the second isolation portion 522, so that the third isolation portion 523 can effectively improve the air gap and the creepage distance between the circuit board 51 and the busbar component 40. The first isolation portion 521 and the second isolation portion 522 can enclose a receiving space for accommodating the circuit board 51, and the probability of short circuit between the circuit board 51 and the first wall 211 and the busbar component 40 is relatively low.

[0138] The third isolation portion 523 is arranged on the second isolation portion 522 and located between the busbar component 40 and the first wall 211. The third isolation portion 523 is used to separate the busbar component 40 and the first wall 211, so as to improve the air gap and the creepage distance between the first wall 211 and the busbar component 40. Optionally, the third isolation portion 523 can be integrally injection molded with the second isolation portion 522, or the third isolation portion 523 can be fixedly connected to the second isolation portion 522 by bonding, clamping, locking, or the like.

[0139] ​In this way, the first isolation portion 521 can be used to separate the circuit board 51 and the first wall 211, so as to reduce the probability of short circuit between the circuit board 51 and the first wall 211; the second isolation portion 522 can be used to separate and protect the busbar component 40, so as to reduce the probability of short circuit between the busbar component 40 and the circuit board 51; and the third isolation portion 523 can be used to separate the busbar component 40 and the first wall 211, so as to reduce the probability of short circuit between the first wall 211 and the busbar component 40.

[0140] Please refer to Figure 3 and Figure 5 In some embodiments, the battery monomer 20 further comprises a pressure relief mechanism 22, which is arranged on the first wall 211 and faces the spacing space 101a.

[0141] Optionally, the pressure relief mechanism 22 can be, but is not limited to, an explosion-proof valve, a pressure relief valve, etc.; when the internal pressure of the shell 21 exceeds a preset value, the pressure relief mechanism 22 can be opened to achieve pressure relief, thereby reducing the probability of combustion or explosion of the battery monomer 20.

[0142] The pressure relief mechanism 22 can be arranged on the first wall 211 and face the spacing space 101a; in this way, when the pressure relief mechanism 22 performs pressure relief, the discharged thermal runaway gas can flow in the spacing space 101a.

[0143] In this way, the pressure relief mechanism 22 can be arranged on the first wall 211, and when thermal runaway occurs inside the battery monomer 20, the pressure relief mechanism 22 can discharge the thermal runaway gas into the spacing space 101a, thereby reducing the probability of combustion or explosion of the battery monomer 20.

[0144] Please refer to Figure 3 , Figure 5 and Figure 6 In some embodiments, the support 31 is formed with an exhaust passage 311 having an opening 31a, at least one end of the exhaust passage 311 in the second direction X penetrates through the support 31 and communicates to the outside of the support 31, and the pressure relief mechanism 22 of each battery monomer 20 in the battery monomer assembly 110 is communicated to the opening 31a.

[0145] In this embodiment, the support 31 can be, but is not limited to, a beam structure, a pipe structure, a block structure, etc.; for example, the hollow part of the support beam can form the exhaust passage 311.

[0146] When the support 31 supports the first wall 211, the pressure relief mechanism 22 can be located within the opening 31a of the support 31, so that when the pressure relief mechanism 22 discharges the thermal runaway gas, the thermal runaway gas can be discharged into the exhaust passage 311 and discharged outward at either end in the second direction X.

[0147] Exemplarily, in some embodiments, the support 31 comprises a first support portion, a second support portion arranged at opposite ends of the first support portion along the second direction X, and a third support portion arranged at a first end of the second support portion away from the first support portion along the third direction Y; thereby, the first support portion, the two second support portions and the two third support portions jointly enclose the exhaust passage 311, and the opening 31a is formed between the two third support portions; the first support portion is connected to the first plate body 121, the third support portion is connected to the first wall 211, and the pressure relief mechanism 22 is located between the two third support portions.

[0148] In this way, when thermal runaway occurs inside the battery monomer 20, the thermal runaway gas can be discharged into the exhaust passage 311 through the opening 31a of the pressure relief mechanism 22 and the support 31, so that the thermal runaway gas can be discharged along the exhaust passage 311, thereby reducing the probability of thermal runaway spreading.

[0149] For reference Figure 5 and Figure 10 In some embodiments, the first thermal management component 12 is provided with an insulation layer 60 on a side wall surface facing the battery monomer assembly 110.

[0150] The insulation layer 60 can refer to a layer structure with insulation performance, for example, a layer structure such as a spray layer, a film layer, a plate layer, etc. Optionally, the material of the insulation layer 60 can be, but is not limited to, a spray material such as aluminum oxide and silicon nitride, or an insulation material such as foam and mica, etc. The insulation layer 60 is arranged on the side wall surface of the first thermal management component 12 facing the battery monomer assembly 110 to realize insulation protection of the first thermal management component 12.

[0151] In some embodiments, when the first thermal management component 12 comprises the first plate body 121 and the second plate body 122, the insulation layer 60 can be arranged on the surface of the first plate body 121 and the first flow passage portion 121a protruding from the first plate body 121.

[0152] In this way, the insulation layer 60 is arranged on the side wall surface of the first thermal management component 12 facing the battery monomer assembly 110 to realize insulation protection, so as to reduce the probability of short circuit between the charged components in the battery monomer 20 or the accommodation cavity 101 and the first thermal management component 12.

[0153] For reference Figure 5 In some embodiments, the first thermal management component 12 is provided with a protective layer 70 on a side wall surface facing away from the battery monomer assembly 110.

[0154] The protective layer 70 can refer to a protective structure for forming protection for the first thermal management component 12 on the outer surface of the surface of the first thermal management component 12 facing away from the battery monomer assembly; when the first thermal management component 12 is capped at one end of the frame 11, the surface of the first thermal management component 12 facing away from the battery monomer assembly 110 is the outer surface of one side of the box 10 or the battery device 100. The protective layer 70 can be, but is not limited to, a protective plate, a protective coating, etc. Alternatively, the material of the protective layer 70 can be, but is not limited to, polyvinyl chloride, polyurea, etc.

[0155] In this way, by arranging the protective layer 70 on the side wall surface of the first thermal management component 12 facing away from the accommodating cavity 101, the impact resistance of the first thermal management component 12 is further improved.

[0156] Please refer to Figure 5 In some embodiments, the second thermal management component 13 includes a third plate body 131 and a fourth plate body 132, the third plate body 131 is recessed to form a second flow channel portion 131a facing away from the fourth plate body 132, the fourth plate body 132 is connected to the third plate body 131 and surrounds the second flow channel portion 131a to form a second heat exchange flow channel 130; the battery monomer 20 is connected to the fourth plate body 132.

[0157] The third plate body 131 can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, etc. The third plate body 131 is formed with a second flow channel portion 131a; it should be understood that the third plate body 131 can be processed by stamping, rolling, etc. to form a recessed second flow channel portion 131a, and the second flow channel portion 131a is recessed to face away from the fourth plate body 132; in this way, when the fourth plate body 132 is connected to the third plate body 131, the fourth plate body 132 is capped on the second flow channel portion 131a of the third plate body 131 to form the second heat exchange flow channel 130. The fourth plate body 132 can be, but is not limited to, an aluminum plate, a copper plate, an iron plate, a steel plate, a copper-aluminum composite plate, a steel-aluminum composite plate, etc.

[0158] The battery monomer 20 is connected to the fourth plate body 132; alternatively, the second wall 212 of the battery monomer 20 can be connected to the fourth plate body 132. The second wall 212 can be directly or indirectly in contact with the fourth plate body 132 by adhesion, buckle connection, lock connection, abutment, etc.; in this way, the heat exchange medium flowing in the second heat exchange flow channel 130 can directly exchange heat with the second wall 212 through the fourth plate body 132, so that the heat exchange effect of the second thermal management component 13 on the battery monomer 20 is more optimal. Moreover, the fourth plate body 132 with a relatively flat surface can form a larger connection area with the second wall 212 to further improve the heat exchange effect of the second thermal management component 13 on the battery monomer 20.

[0159] In this way, the fourth plate body 132 encloses the second flow channel portion 131a to form a second heat exchange flow channel 130 for the heat exchange medium to flow, so that the battery monomer 20 is connected to the fourth plate body 132, and the heat exchange medium flowing in the second heat exchange flow channel 130 exchanges heat with the battery monomer 20 through the fourth plate body 132, so as to achieve the purpose of dissipating heat of the battery monomer 20.

[0160] In the following, the battery device 100 provided by the present application will be further described according to specific embodiments.

[0161] Please refer to Figure 2 to Figure 10 In the present embodiment, the battery device 100 can be applied to a vehicle, and the battery device 100 can be assembled on the vehicle body structure of the vehicle along the first direction Z and provide electric energy for the vehicle.

[0162] The battery device 100 comprises a box body 10 and at least one battery monomer assembly 110; the box body 10 comprises a frame 11, a first heat management component 12 and a second heat management component 13, the first heat management component 12 is internally formed with a first heat exchange flow channel 120, and the second heat management component 13 is internally formed with a second heat exchange flow channel 130; in the first direction Z, the first heat management component 12 and the second heat management component 13 are respectively arranged at opposite ends of the frame 11, and the frame 11, the first heat management component 12 and the second heat management component 13 jointly enclose a containing cavity 101, and the battery monomer assembly 110 is accommodated in the containing cavity 101. In the present embodiment, the battery device 100 can be assembled on the vehicle body structure along the first direction Z and at one side of the second heat management component 13; thus, the first heat management component 12 faces away from the vehicle body structure and faces downward.

[0163] The battery monomer assembly 110 comprises a plurality of battery monomers 20 arranged in sequence along a second direction X, and each battery monomer 20 comprises an outer shell 21, a pressure relief mechanism 22 and two electrode terminals 211a; in the first direction Z, the outer shell 21 has opposite first and second walls 211 and 212, and the second wall 212 is bonded to the second heat management component 13 through a heat conduction member; the pressure relief mechanism 22 and the two electrode terminals 211a are arranged on the first wall 211, and the two electrode terminals 211a are arranged in a spaced manner along a third direction Y, and the pressure relief mechanism 22 is located between the two electrode terminals 211a. Among them, the first direction Z, the second direction X and the third direction Y are perpendicular to each other.

[0164] The battery device 100 further comprises a busbar component 40 and a sampling assembly 50; the busbar component 40 is used for electrically connecting two electrode terminals 211a of adjacent battery monomers 20 in the battery monomer assembly 110 along the second direction X. The sampling assembly 50 comprises a plurality of circuit boards 51, and the circuit boards 51 are arranged on either side of the busbar component 40 in the third direction Y, and the circuit boards 51 are electrically connected to adjacent busbar components 40 through a conductive structure.

[0165] The first thermal management component 12 comprises a first plate body 121 and a second plate body 122, the first plate body 121 is recessed to form a first flow channel portion 121a facing away from the second plate body 122, the second plate body 122 is connected to the first plate body 121 and encloses the first flow channel portion 121a to form a first heat exchange flow channel 120, the first flow channel portion 121a is connected to the first wall 211, and a spacing space 101a is formed between the first plate body 121 and the first wall 211.

[0166] The battery device 100 further comprises a protection assembly 30, the protection assembly 30 comprises a support 31, a first buffer 32 and a second buffer 33. The support 31 is arranged in the spacing space 101a, and the support 31 is connected to the first wall 211 and the first plate body 121 respectively. The support 31 is formed with an exhaust passage 311 having an opening 31a, at least one end of the exhaust passage 311 penetrates through the support 31 and communicates to the outside of the support 31 in the second direction X, and the pressure relief mechanism 22 of each battery monomer 20 in the battery monomer assembly 110 is communicated to the opening 31a. The first buffer 32 is arranged in the spacing space 101a, the first buffer 32 is connected to the first plate body 121 and the busbar component 40, and the first buffer 32 is also located between the circuit board 51 and the first plate body 121. The circuit board 51, the busbar component 40 and the electrode terminal 211a are buffered by the first buffer 32.

[0167] The circuit board 51 can be bent to form a bending structure 511 along the third direction Y, and the second buffer 33 is arranged in the gap 511a formed in the middle of the bending structure 511, and the second buffer 33 is used to support the bending structure 511 in the gap 511a to reduce the probability of breaking the bending structure 511.

[0168] Please refer to Figure 1 and Figure 2 The application also provides a power utilization device, which comprises the battery device 100 as described above, and the battery device 100 is used to provide electric energy.

[0169] The power utilization device provided by the application, for example, the vehicle 1000 as described above, comprises the battery device 100 as described above, and the reliability of the power utilization device is also better when the reliability of the battery device 100 in the high-rate operation state is better.

[0170] The above is only a preferred embodiment of the application, and is not used 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 battery cell assembly comprising a plurality of battery cells arranged in a second direction in sequence; a first thermal management component arranged on one side of the battery cell assembly in a first direction, and close to or connected to the plurality of battery cells in the battery cell assembly; and a second thermal management component arranged on the opposite side of the battery cell assembly in the first direction, and close to or connected to the plurality of battery cells in the battery cell assembly; wherein the first direction is perpendicular to the second direction. The battery device further comprises a box body comprising a frame, the first thermal management component is arranged at one end of the frame, and the second thermal management component is arranged at the opposite end of the frame; the frame, the first thermal management component and the second thermal management component jointly form a containing cavity, and the battery cell assembly is accommodated in the containing cavity.

2. The battery device of claim 1, wherein: The battery cell comprises a shell, and the shell has opposite first and second walls in the first direction, at least part of the first wall is connected to the first thermal management component, and at least part of the second wall is connected to the second thermal management component.

3. The battery device of claim 2, wherein: The battery device further comprises a protection assembly arranged on the first thermal management component.

4. The battery device of claim 3, wherein: The first thermal management component comprises a first plate body and a second plate body, the first plate body is recessed to form a first flow channel portion away from the second plate body, the second plate body is connected to the first plate body and encloses the first flow channel portion to form a first heat exchange flow channel, the first flow channel portion is connected to the first wall, and a spacing space is formed between the first plate body and the first wall; the protection assembly comprises a support arranged in the spacing space, and the support is connected to the first plate body and the first wall.

5. The battery device of claim 4, wherein: The battery cell further comprises two electrode terminals arranged in a third direction on the first wall, the third direction is perpendicular to the first direction and the second direction; the battery device further comprises a busbar component for electrically connecting two electrode terminals adjacent in the second direction in the battery cell assembly; the protection assembly further comprises a first buffer arranged in the spacing space, and the first buffer is connected to the first plate body and the busbar component.

6. The battery device of claim 5, wherein: The battery device further comprises a sampling assembly comprising a plurality of circuit boards arranged on either side of the busbar component in the third direction, and the circuit boards are located between the first buffer and the first wall; the circuit boards are electrically connected to adjacent busbar components through a conductive structure.

7. The battery device of claim 6, wherein: At least one of the plurality of circuit boards is bent in the third direction to form a bent structure, and a gap is formed in the middle of the bent structure.

8. The battery device of claim 7, wherein: The protection assembly further comprises a second buffer arranged in the gap and supported on the bent structure. ​ 9. The battery device according to claim 7 or 8, characterized by: The sampling assembly further comprises an isolation member, the isolation member comprising a first isolation portion, a second isolation portion and a third isolation portion; The first isolation portion is arranged between the first wall and the circuit board, and is configured to separate the circuit board and the first wall; The second isolation portion is arranged at at least one end of the first isolation portion in the third direction, and abuts against the busbar component, and projections of the busbar component in the third direction are located on the second isolation portion; The third isolation portion is arranged on the second isolation portion, and is located between the busbar component and the first wall.

10. The battery device according to any one of claims 7 to 9, characterized by: The battery cell further comprises a pressure relief mechanism arranged on the first wall, and the pressure relief mechanism faces the space.

11. The battery device of claim 10, wherein: An exhaust passage with an opening is formed on the support member, at least one end of the exhaust passage penetrates through the support member and communicates to the outside of the support member in the second direction, and the pressure relief mechanism of each battery cell in the battery cell assembly communicates with the opening.

12. The battery device according to any one of claims 1 to 11, characterized by: An insulation layer is arranged on a side wall of the battery cell assembly facing the first thermal management component.

13. The battery device according to any one of claims 1 to 12, characterized by: A protective layer is arranged on a side wall of the battery cell assembly facing away from the first thermal management component.

14. The battery device according to any one of claims 1 to 13, characterized by: The second thermal management component comprises a third plate body and a fourth plate body, the third plate body is recessed to form a second flow channel portion facing away from the fourth plate body, the fourth plate body is connected to the third plate body and surrounds the second flow channel portion to form a second heat exchange flow channel, and the battery cell is connected to the fourth plate body.

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

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