Battery device and electric device

Abstract

The utility model relates to the technical field of batteries, and discloses a battery device and an electric device, and the battery device comprises a box body with an accommodating space; the battery monomer assembly is arranged in the accommodating space and comprises a plurality of battery monomers; the heat exchange component is used for exchanging heat with the plurality of battery monomers, a first flow channel, a second flow channel and a third flow channel are arranged in the heat exchange component, the first flow channel is provided with a first interface, the second flow channel is provided with a second interface, the first flow channel and the second flow channel extend along a first direction and are arranged at an interval in a second direction, and the second direction is perpendicular to the first direction; the multiple third flow channels are arranged in the first direction, each third flow channel extends in the second direction, and the two ends, located in the second direction, of at least part of the multiple third flow channels communicate with the first flow channel and the second flow channel correspondingly. According to the utility model, the temperatures of all the single batteries after heat exchange can be kept consistent, the temperature uniformity after heat exchange is improved, and the reliability of the battery device is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and service life. However, the battery cells in the battery will generate a lot of heat during the continuous charging and discharging process, which will cause the internal temperature of the battery to rise sharply, which will seriously affect the reliability of the battery. Therefore, how to further improve the reliability of the battery has become one of the bottlenecks restricting the development of battery technology. Utility Model Content

[0003] The embodiments of the present application provide a battery device and an electrical device, which can effectively adjust the temperature consistency of the battery device, thereby improving the reliability of the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, comprising: a box body, the box body having a accommodating space; a battery cell assembly, the battery cell assembly is arranged in the accommodating space and comprises a plurality of battery cells; a heat exchange component, the heat exchange component is used for heat exchange with the plurality of battery cells, a first flow channel, a second flow channel and a third flow channel are provided inside the heat exchange component, the first flow channel is provided with a first interface, the second flow channel is provided with a second interface, the first flow channel and the second flow channel extend along a first direction and are spaced apart in a second direction, the second direction is perpendicular to the first direction, a plurality of third flow channels are provided in the first direction, each third flow channel extends along the second direction, and at least some of the plurality of third flow channels are located at both ends of the second direction and are respectively connected to the first flow channel and the second flow channel.

[0005] In the above technical scheme, through the heat exchange component of the above structure, when the heat exchange component exchanges heat with the battery cell assembly, the first flow channel or the second flow channel can distribute the heat exchange medium introduced into multiple third flow channels, thereby reducing the temperature difference between the heat exchange medium flowing through the third flow channels and the heat exchange medium initially introduced, reducing heat loss, and facilitating the temperature of all battery cells after heat exchange to remain consistent, thereby improving the temperature uniformity of the battery cell assembly after heat exchange, thereby improving the reliability of the battery cell assembly, and then improving the reliability of the battery device.

[0006] In some embodiments of the present application, the first flow channel includes a first section and a second section that are interconnected, the first section is provided with a first interface, the second section and the first section both extend along the first direction and are arranged side by side in the second direction, the second section is closer to the third flow channel relative to the first section, and is connected to multiple third flow channels.

[0007] In the above technical solution, the first flow channel using the above structure can balance the path lengths of multiple circulation branches inside the heat exchange component, which is beneficial to reducing the difference in the path lengths of the multiple circulation branches, thereby making the flow difference of the heat exchange medium in the circulation branches where different third flow channels are located smaller, which is beneficial to improving the heat exchange uniformity at the locations of the multiple third flow channels, reducing the risk of large temperature differences when the heat exchange component exchanges heat with the battery cell assembly, and can improve the heat exchange uniformity of the heat exchange component, which is beneficial to improving the reliability of the battery device.

[0008] In some embodiments of the present application, a connecting port is formed at a position where the first section and the second section are connected, a plurality of connecting ports are provided in the first direction, and a first interface is provided at one end of the first section located in the first direction.

[0009] In the above technical solution, the above structure can better adjust and balance the path lengths of multiple circulation branches inside the heat exchange component and the flow rate of the heat exchange medium, further reduce the difference in the path lengths of the multiple circulation branches, and reduce the flow rate difference of the heat exchange medium in different circulation branches. The heat exchange uniformity at the locations of the multiple third flow channels can be further improved, reducing the risk of large temperature differences during heat exchange in the heat exchange component, improving the heat exchange uniformity of the heat exchange component, and helping to further improve the reliability of the battery device.

[0010] In some embodiments of the present application, the opening sizes of at least some of the multiple communication ports are adjustable.

[0011] In the above technical solution, the flow resistance of different connecting ports between the first section and the second section can be adjusted through the above structure, and then the flow direction of different circulation branches can be adjusted, thereby adjusting the path length and flow rate of the circulation branch, further reducing the difference in path length and flow rate of different circulation branches in the heat exchange component, improving the heat exchange uniformity of the heat exchange component, improving the reliability of the battery cell assembly, and thus improving the reliability of the battery device.

[0012] In some embodiments of the present application, a first opening is formed at a position where each third flow channel is connected to the first flow channel, and a second opening is formed at a position where the third flow channel is connected to the second flow channel. The opening sizes of at least some of the first openings and the second openings of the multiple third flow channels are adjustable.

[0013] In the above technical scheme, the flow resistance of different third flow channels can be adjusted through the above scheme, which is beneficial to accurately adjust the flow distribution of the heat exchange medium in different third flow channels, so that the flow difference of multiple circulation branches in the heat exchange component is relatively small or the flow remains equal, and the heat exchange capacity of multiple circulation branches can be kept roughly the same or the same, which is beneficial to further improve the heat exchange uniformity of the heat exchange component, reduce the risk of large temperature difference after heat exchange in the battery cell assembly, improve the reliability of the battery cell assembly, and improve the reliability of the battery device.

[0014] In some embodiments of the present application, a connecting port is formed at the position where the first section and the second section are connected, the connecting port is arranged at one end of the first section in the first direction, and the first interface is arranged at the other end of the first section in the first direction.

[0015] In the above technical solution, the first flow channel of the above structure is conducive to keeping the path lengths of multiple circulation branches inside the heat exchange component equal, so that each circulation branch can have equal flow and the same heat exchange capacity. The heat exchange component has better heat exchange uniformity for the battery cell assembly, and can also simplify the structure of the first flow channel, thereby simplifying the overall structure of the heat exchange component and reducing costs.

[0016] In some embodiments of the present application, the first interface is configured as an inlet for inputting a heat exchange medium. In this technical solution, the first flow channel is a flow channel for inputting a heat exchange medium, and the heat exchange medium can be distributed to different third flow channels along the flow direction. When the path lengths of multiple circulation branches are equal, the risk of convection or cross-flow can be reduced, which is conducive to improving the stability and reliability of each circulation branch, thereby enabling multiple circulation branches to operate normally, and improving the reliability and uniformity of heat exchange, thereby helping to improve the reliability of the battery cell assembly and the reliability of the battery device.

[0017] In some embodiments of the present application, the first interface is configured as an outlet for outputting a heat exchange medium, a first opening is formed at a position where each third flow channel is connected to the first flow channel, and a second opening is formed at a position where the third flow channel is connected to the second flow channel, and the opening sizes of at least some of the first openings and the second openings of the multiple third flow channels are adjustable.

[0018] In the above technical solution, when the first interface is configured as an outlet for outputting the heat exchange medium, by setting the opening size of at least part of the first openings and the second openings of the multiple third flow channels to be adjustable, it is helpful to reduce the risk of convection or cross-flow between different circulation branches, and can improve the stability and reliability of the circulation branches, improve the heat exchange reliability and uniformity, and thus help to improve the reliability of the battery cell assembly and the reliability of the battery device.

[0019] In some embodiments of the present application, a first opening is formed at a position where each third flow channel is connected to the first flow channel, and a second opening is formed at a position where each third flow channel is connected to the second flow channel, and the first opening and the second opening are diamond-shaped holes or waist-shaped holes. In the above technical solution, by setting the first opening and the second opening as holes of the above shapes, the structure is simple and easy to process and manufacture, which can reduce the manufacturing cost.

[0020] In some embodiments of the present application, each third flow channel is formed with a first opening at a position connected to the first flow channel, and a second opening is formed at a position connected to the second flow channel, and a blocking member is provided at some of the first openings and the second openings in the plurality of third flow channels. In this technical solution, some of the plurality of third flow channels can be kept in a closed state, thereby reducing the number of circulation branches, and adjusting the heat exchange capacity of the heat exchange component as needed to meet the use requirements of different battery devices, and also reducing the overall flow of the heat exchange medium, which is conducive to reducing the weight of the battery device and improving the energy density.

[0021] In some embodiments of the present application, the first interface and the second interface are arranged at the same end of the heat exchange component in the first direction. In this technical solution, the first interface and the second interface are located on the same side, which is more convenient for connecting with the external heat exchange medium supply and recovery system in terms of pipeline layout, reducing the complexity of pipeline layout, and facilitating centralized management and monitoring of the inlet and outlet of the heat exchange medium, which is beneficial to the normal operation of the thermal management of the battery device.

[0022] In some embodiments of the present application, the heat exchange component is located in the accommodating space and is provided on the bottom wall of the box body.

[0023] In the above technical solution, the heat exchange component can be arranged at the bottom of the battery cell assembly and located in the box, which can better protect the heat exchange component, reduce the risk of damage to the heat exchange component when mechanical impact occurs, and improve the reliability of the heat exchange component. The heat exchange component and the bottom wall of the box can also protect the battery cell assembly together by adopting the above solution, reduce the risk of external sharp objects piercing the battery cell when mechanical impact occurs, and thus improve the reliability of the battery cell assembly and the reliability of the battery device.

[0024] In some embodiments of the present application, the box includes a box body and a box cover, a first opening is formed at one end of the box body in the third direction, a second opening is formed at the other end, the box cover is closed at the first opening, and the heat exchange component is closed at the second opening. In this technical solution, the heat exchange component can be integrated on the box body and form an integral part with the box body, so that the number of parts can be reduced while taking into account the heat exchange function and the protection function, and the weight of the battery device can be reduced, thereby improving the energy density of the battery device.

[0025] In some embodiments of the present application, the heat exchange component includes: a first heat exchange portion, extending along a first direction, and being hollow inside and forming a first flow channel; a second heat exchange portion, extending along the first direction, and being hollow inside and forming a second flow channel; a third heat exchange portion, extending along the first direction, and connecting the first heat exchange portion and the second heat exchange portion, and a plurality of third flow channels are formed inside the third heat exchange portion.

[0026] In the above technical scheme, by dividing the heat exchange component into three parts, and each part forms a corresponding flow channel structure, the first heat exchange part, the second heat exchange part and the third heat exchange part can be manufactured in a targeted and orderly manner, so as to process the first flow channel, the second flow channel and the third flow channel, which is conducive to clarifying the structure of each part of the heat exchange component, thereby reducing the manufacturing difficulty, improving the manufacturability of the heat exchange component, and helping to improve product quality.

[0027] In some embodiments of the present application, the first heat exchange part, the second heat exchange part and the third heat exchange part are spliced ​​and connected to each other. In this technical solution, the heat exchange component can be a split structure, and is formed by splicing and combining the first heat exchange part, the second heat exchange part and the third heat exchange part, thereby reducing the overall processing difficulty of the heat exchange component, improving manufacturability, and being conducive to improving product yield and reducing manufacturing costs.

[0028] In some embodiments of the present application, the third heat exchange part is an integrally formed part. In this technical solution, the third heat exchange part adopting the above structure has good integrity, which can reduce assembly steps and improve assembly efficiency. In addition, the third heat exchange part of the integral structure has high rigidity and structural strength, which can reduce the risk of damage and has high reliability.

[0029] In some embodiments of the present application, the third heat exchange part includes a plurality of split parts, one or more third flow channels are formed inside each split part, and the plurality of split parts are arranged sequentially in the first direction and spliced ​​together.

[0030] In the above technical solution, the third heat exchange part is a split structure. Compared with making a third heat exchange part of a larger size as a whole, by configuring the third heat exchange part to include multiple split parts, the size of each split part is relatively small, the manufacturing difficulty is relatively low, and the quality of the finished product is relatively easy to control. This can reduce the overall manufacturing difficulty of the third heat exchange part, reduce manufacturing costs, and also help to improve product yield.

[0031] In some embodiments of the present application, the first heat exchange portion, the second heat exchange portion and the third heat exchange portion are integrally formed.

[0032] In the above technical solution, the above structure can improve the overall rigidity and strength of the heat exchange component, reduce the risk of deformation or damage of the heat exchange component, and reduce the possible joints between the components, thereby reducing the probability of weak links. This can improve the reliability of the heat exchange component and further improve the reliability of the battery device as a whole.

[0033] In a second aspect, an embodiment of the present application further provides an electrical device, comprising a battery device as described in any of the foregoing.

[0034] In the above technical solution, since the battery device has good heat exchange uniformity, the battery device has good reliability. The use of the battery device can improve the power consumption reliability of the power-consuming device, thereby improving the reliability of the power-consuming device. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0036] Figure 1 A schematic diagram of a structure in which the electric device provided in some embodiments of the present application is a vehicle;

[0037] Figure 2 Structural explosion of the battery device provided by some embodiments of the present application Figure 1 ;

[0038] Figure 3 Structural explosion of the battery device provided by some embodiments of the present application Figure 2 ;

[0039] Figure 4 A top view of a heat exchange component provided for some embodiments of the present application;

[0040] Figure 5 A schematic diagram of the internal structure of a heat exchange component provided in some embodiments of the present application;

[0041] Figure 6 A schematic diagram of the internal structure of a heat exchange component provided in another embodiment of the present application;

[0042] Figure 7 A schematic diagram of the internal structure of a heat exchange component provided in yet another embodiment of the present application;

[0043] Figure 8 for Figure 4 Sectional view along line AA;

[0044] Fig. 9 for Figure 8 A local enlarged schematic diagram of location VIIII;

[0045] Fig.10 A schematic diagram of the internal structure of a battery device provided in some embodiments of the present application;

[0046] Fig.11 A schematic diagram of the internal structure of a battery device provided in another embodiment of the present application.

[0047] icon:

[0048] 1000. Electrical devices;

[0049] 100. Battery device;

[0050] 10, box body; 11, first box body; 12, second box body; 10a, accommodating space; 101, box body; 1011, bottom wall; 102, box cover;

[0051] 20. Battery cell assembly; 21. Battery cell; 20a. Bottom surface;

[0052] 30, heat exchange component; 301, first flow channel; 301a, first interface; 301b, communication port; 3011, first section; 3012, second section; 302, second flow channel; 302a, second interface; 303, third flow channel; 303a, first port; 303b, second port; 31, first heat exchange part; 32, second heat exchange part; 33, third heat exchange part; 331, split part; 34, first end plate; 35, second end plate;

[0053] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0054] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0055] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0056] Reference to "embodiment" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiment may be included in at least one embodiment of the present application. The appearance of the phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments.

[0057] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0058] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0059] In the embodiments of the present application, the same reference numerals represent the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width and other dimensions of various components in the embodiments of the present application shown in the drawings, as well as the overall thickness, length, width and other dimensions of the integrated device are only exemplary descriptions and should not constitute any limitation to the present application.

[0060] The term “plurality” used in this application refers to two or more (including two).

[0061] In the present application, battery cells may include lithium-ion batteries, sodium-ion batteries, sodium-lithium-ion batteries, lithium metal batteries, sodium metal batteries, lithium-sulfur batteries, magnesium-ion batteries, nickel-metal hydride batteries, nickel-cadmium batteries, lead-acid batteries, etc., which are not limited in the embodiments of the present application. Battery cells may be cylindrical, flat, rectangular or other shapes, which are not limited in the embodiments of the present application. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, which are not limited in the embodiments of the present application.

[0062] The battery apparatus (Battery Apparatus) mentioned in the embodiments of the present application may refer to one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include multiple battery cells, and the multiple battery cells are connected in series, in parallel, or in mixed connection through a busbar. In some embodiments, the battery cell assembly (Battery Cell Assembly) is generally formed by arranging multiple battery cells.

[0063] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0064] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the housing. As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the housing by fixing the battery module in the housing. As an example, the battery cell assembly may also be accommodated in the housing by directly fixing a plurality of battery cells to the housing. The housing may prevent liquid or other foreign matter from affecting the charging or discharging of the battery cells.

[0065] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode active material layer is coated on the surface of the positive electrode collector. The positive electrode collector not coated with the positive electrode active material layer protrudes from the positive electrode collector coated with the positive electrode active material layer. The positive electrode collector not coated with the positive electrode active material layer serves as a positive electrode ear. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide, etc. The negative electrode sheet includes a negative electrode current collector and a negative electrode active material layer. The negative electrode active material layer is coated on the surface of the negative electrode current collector. The negative electrode current collector not coated with the negative electrode active material layer protrudes from the negative electrode current collector coated with the negative electrode active material layer. The negative electrode current collector not coated with the negative electrode active material layer serves as a negative electrode tab. The material of the negative electrode current collector can be copper, and the negative electrode active material can be carbon or silicon, etc. In order to ensure that a large current passes without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0066] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0067] In recent years, new energy vehicles have developed by leaps and bounds. In the field of electric vehicles, batteries, as the power source of electric vehicles, play an irreplaceable and important role. The battery consists of a box and multiple battery cells contained in the box. Among them, batteries, as core components of new energy vehicles, have high requirements in terms of safety and service life. However, the battery cells in the battery will generate a lot of heat during the continuous charging and discharging process, which will cause the internal temperature of the battery to rise sharply, which will seriously affect the reliability of the battery. Therefore, how to further improve the reliability of the battery has become one of the bottlenecks restricting the development of battery technology.

[0068] In general battery devices, cold plates are usually used to exchange heat between internal battery modules or battery cells. However, the flow design inside such cold plates is relatively simple, and the flow path is generally U-shaped. For battery devices with higher energy density and longer required flow paths, since the distance between the two ends of the flow path is relatively far, more heat is lost during the heat exchange with the battery module or battery cell assembly, resulting in a large temperature difference inside the battery device and inconsistent temperature regulation, which in turn greatly reduces the cooling effect and easily leads to safety risks such as cooling function degradation, high temperature alarm, life attenuation, thermal runaway, etc., which is not conducive to maintaining the consistency of temperature regulation inside the battery device, thereby affecting the reliability of the battery device.

[0069] Based on the above considerations, in order to solve the problem that the temperature regulation consistency of the battery device after heat exchange is poor in the related art, which affects the overall reliability of the battery device. The applicant has designed a battery device, including: a box body, a battery cell assembly and a heat exchange component, the box body has a storage space; the battery cell assembly is arranged in the storage space and includes a plurality of battery cells; the heat exchange component is used for heat exchange with a plurality of battery cells, and the heat exchange component is provided with a first flow channel, a second flow channel and a third flow channel inside, the first flow channel is provided with a first interface, the second flow channel is provided with a second interface, the first flow channel and the second flow channel extend along the first direction, and are arranged at intervals in the second direction, the second direction is perpendicular to the first direction, and a plurality of third flow channels are provided in the first direction, each third flow channel extends in the second direction, and at least part of the plurality of third flow channels are located in the second direction. The two ends are connected to the first flow channel and the second flow channel respectively.

[0070] In a battery device of this structure, through the heat exchange component of the above structure, when the heat exchange component exchanges heat with the battery cell assembly, the first flow channel or the second flow channel can distribute the heat exchange medium introduced into multiple third flow channels, thereby reducing the temperature difference between the heat exchange medium flowing through the third flow channels and the heat exchange medium initially introduced, reducing heat loss, and facilitating the temperature of all battery cells to remain consistent after heat exchange, thereby improving the temperature uniformity of the battery cell assembly as a whole after heat exchange, thereby improving the reliability of the battery cell assembly, and then improving the reliability of the battery device.

[0071] The battery device disclosed in the embodiment of the present application can be used in, but not limited to, electrical devices such as vehicles, ships, or aircraft. A power supply system of the electrical device can be composed of the battery device disclosed in the present application.

[0072] The embodiment of the present application provides an electric device using a battery device as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, for example, a game console, an electric car toy, an electric ship toy, an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0073] For the convenience of description, the following embodiments are described by taking a vehicle as an example of an electric device 1000 of an embodiment of the present application. Figure 1 , Figure 1 The power consumption device 1000 provided for some embodiments of the present application is a schematic diagram of the structure of a vehicle. The vehicle can be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle can be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle, and the battery device 100 can be provided at the bottom, head or tail of the vehicle. The battery device 100 can be used to power the vehicle, for example, the battery device 100 can be used as an operating power source for the vehicle. The vehicle may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle. Working power requirements.

[0074] In some embodiments of the present application, the battery device 100 can be used not only as an operating power source for the vehicle, but also as a driving power source for the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0075] Please refer to Figure 2 , Figure 2The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box body 10 and a plurality of battery cells 21, and the battery cells 21 are accommodated in the box body 10. Among them, the box body 10 is used to provide an assembly space for the battery cells 21, and the box body 10 can adopt a variety of structures. In some embodiments, the box body 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cells 21. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0076] In the battery device 100, multiple battery cells 21 can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells 21 are connected in series and in parallel. Multiple battery cells 21 can be directly connected in series, in parallel, or in a mixed connection, and then the whole formed by multiple battery cells 21 is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells 21 in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 may also include other structures, for example, the battery device 100 may also include a busbar component for realizing electrical connection between multiple battery cells 21.

[0077] Please refer to Figure 2 , Figure 2 The structure of the battery device 100 provided in some embodiments of the present application is exploded. The battery device 100 includes multiple rows of battery cells 21, which are arranged along the length direction of the box body 10, and each row of battery cells 21 includes multiple battery cells 21 arranged along the width direction of the box body 10; or, multiple rows of battery cells 21 are arranged along the width direction of the box body 10, and each row of battery cells 21 includes multiple battery cells 21 arranged along the length direction of the box body 10.

[0078] Each battery cell 21 may be a secondary battery or a primary battery, wherein a secondary battery refers to a battery cell 21 that can be continuously used by activating the active material by charging after the battery cell is discharged; it may also be a lithium-ion battery, a sodium-ion battery, a sodium-lithium-ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium-ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application. The battery cell 21 may be cylindrical, flat, rectangular, or in other shapes. For example, in Figure 2 In the figure, the battery cell 21 is in the shape of a rectangular parallelepiped.

[0079] According to some embodiments of the present application, referring to Figures 3 to 5 The embodiment of the present application provides a battery device 100, including: a box body 10, a battery cell assembly 20, and a heat exchange component 30, wherein the box body 10 has a storage space 10a; the battery cell assembly 20 is arranged in the storage space 10a and includes a plurality of battery cells 21; the heat exchange component 30 is used for heat exchange with the plurality of battery cells 21, and a first flow channel 301, a second flow channel 302 and a third flow channel 303 are arranged inside the heat exchange component 30, the first flow channel 301 is provided with a first interface 301a, the second flow channel 302 is provided with a second interface 302a, the first flow channel 301 and the second flow channel 302 extend along a first direction X, and are arranged at intervals in a second direction Y, the second direction Y is perpendicular to the first direction X, a plurality of third flow channels 303 are arranged in the first direction X, each of the third flow channels 303 extends along the second direction Y, and at least part of the plurality of third flow channels 303, at two ends located in the second direction Y, are respectively connected to the first flow channel 301 and the second flow channel 302.

[0080] The explanation of the box body 10 can be found in the previous text and will not be repeated here.

[0081] The battery cell assembly 20 may refer to an assembly composed of a plurality of battery cells 21. The plurality of battery cells 21 may be arranged in sequence along a first direction X, or may be arranged in sequence along a second direction Y, which is not specifically limited here.

[0082] The heat exchange component 30 may refer to a structure or component that can exchange heat with multiple battery cells 21 to control the temperature of the battery cell assembly 20. The first flow channel 301, the second flow channel 302 and the third flow channel 303 may refer to the flow channels formed inside the heat exchange component 30 for circulating the heat exchange medium, wherein the heat exchange medium may be but not limited to water, oil, ethylene glycol aqueous solution, etc. Exemplarily, the heat exchange component 30 may be a plate-like structure as a whole. Among them, the first interface 301a may be an inlet for inputting the heat exchange medium, and the second interface 302a may be an outlet for outputting the heat exchange medium; or, the first interface 301a may be an outlet for outputting the heat exchange medium, and the second interface 302a may be an inlet for inputting the heat exchange medium.

[0083] Among them, the multiple third flow channels 303 can be all of the second direction Y, both ends of which are connected to the first flow channel 301 and the second flow channel 302 respectively. At this time, all the third flow channels 303 can participate in the circulation of the heat exchange medium, and the heat exchange component 30 has a higher heat exchange capacity. The multiple third flow channels 303 can also be only part of the second direction Y, both ends of which are connected to the first flow channel 301 and the second flow channel 302 respectively, and the remaining third flow channels 303 are not connected to the first flow channel 301 and the second flow channel 302. In this way, the number of third flow channels 303 that conduct the first flow channel 301 and the second flow channel 302 can be selectively set to adjust the heat exchange capacity of the heat exchange component 30 to meet different usage requirements.

[0084] The heat exchange component 30 can be disposed in the accommodation space 10a formed inside the box 10, or can be disposed outside the box 10, and there is no specific limitation here. When the heat exchange component 30 is disposed outside the box 10, the heat exchange component 30 can exchange heat with the multiple battery cell assemblies 20 through the box wall of the box 10.

[0085] The first direction X and the second direction Y may refer to one of the width direction or the length direction of the surface of the battery cell assembly 20 and the heat exchange component 30 for heat exchange. The surface of the battery cell assembly 20 and the heat exchange component 30 for heat exchange may be, but not limited to, the bottom surface 20a, the top surface, the side surface, etc. For example, the surface of the battery cell assembly 20 and the heat exchange component 30 for heat exchange may be the bottom surface 20a (see Figure 3 ), the first direction X may be the length direction of the bottom surface 20a, and the second direction Y may be the width direction of the bottom surface 20a; or, the first direction X may be the width direction of the bottom surface 20a, and the second direction Y may be the length direction of the bottom surface 20a.

[0086] For ease of understanding, the following description is made by taking the first interface 301a as the inlet for inputting the heat exchange medium and the second interface 302a as the outlet for outputting the heat exchange medium as an example.

[0087] When the battery device 100 is working, the first interface 301a of the heat exchange component 30 is connected to a pipe for introducing heat exchange medium, and the second interface 302a is connected to a pipe for conveying circulated heat exchange medium, thereby enabling the heat exchange medium to circulate back and forth in the flow channel inside the heat exchange component 30. Figure 5After the heat exchange medium enters the first flow channel 301 from the first interface 301a, it can flow along the first direction X to the end of the first flow channel 301, so that the temperature difference of the heat exchange medium at both ends of the heat exchange component 30 in the first direction X is relatively small, which is conducive to more efficient heat exchange between the heat exchange medium and the battery cells 21 at both ends of the first direction X, thereby improving the heat exchange efficiency. In the process of the heat exchange medium flowing through the first flow channel 301, part of the heat exchange medium can also be diverted to multiple third flow channels 303, so that the temperature difference between each third flow channel 303 and the heat exchange medium at both ends of the first flow channel 301 in the first direction X is also relatively small, thereby also enabling the third flow channel 303 and the corresponding battery cell 21 to perform more efficient heat exchange. Finally, all the heat exchange media flowing through the third flow channel 303 can converge in the second flow channel 302 and flow out from the second interface 302a along the second flow channel 302.

[0088] It can be understood that, through the distribution design of the above-mentioned first flow channel 301, the second flow channel 302 and the third flow channel 303, the heat exchange component 30 performs heat exchange with the battery cell 21 by distributing the heat exchange medium to different third flow channels 303. The heat exchange medium initially entering from the first flow channel 301 can directly enter different third flow channels 303. This can reduce the temperature difference between the heat exchange medium from the first interface 301a to the third flow channel 303, that is, reduce heat loss. As a result, the heat exchange medium flowing through the third flow channel 303 can exchange more heat with the battery cell 21 at the corresponding position, so that the battery cell 21 corresponding to each third flow channel 303 has a better heat exchange effect, which is beneficial to make the temperature difference of multiple battery cells 21 after heat exchange relatively small, and the overall temperature uniformity of the battery cell assembly 20 is better, which is beneficial to reduce the system temperature difference.

[0089] Similarly, when the second interface 302a is the inlet for inputting the heat exchange medium and the first interface 301a is the outlet for outputting the heat exchange medium, the working principle thereof is as mentioned above and will not be described in detail here.

[0090] In particular, for a battery device 100 with a larger size in the first direction X, the distance between the two ends of the battery cell assembly 20 in the first direction X is larger. Compared with the problem of large heat loss in the S-shaped flow path and the U-shaped flow path in the related art, the heat exchange component 30 can make the temperature difference between the heat exchange medium at the two ends of the battery cell assembly 20 in the first direction X and the heat exchange medium initially introduced smaller, so the heat exchange effect that can be provided is also better.

[0091] In the above technical scheme, through the heat exchange component 30 of the above structure, when the heat exchange component 30 exchanges heat with the battery cell assembly 20, the first flow channel 301 or the second flow channel 302 can distribute the introduced heat exchange medium to multiple third flow channels 303, thereby reducing the temperature difference between the heat exchange medium flowing through the third flow channels 303 and the heat exchange medium initially introduced, reducing heat loss, and being beneficial to keeping the temperature of all battery cells 21 consistent after heat exchange, improving the temperature uniformity of the battery cell assembly 20 after heat exchange, thereby improving the reliability of the battery cell assembly 20 and the reliability of the battery device 100.

[0092] In some embodiments of the present application, reference Figure 6 and Figure 7 The first flow channel 301 includes a first section 3011 and a second section 3012 which are interconnected. The first section 3011 is provided with a first interface 301a. The second section 3012 and the first section 3011 both extend along the first direction X and are arranged side by side in the second direction Y. The second section 3012 is closer to the third flow channel 303 than the first section 3011 and is connected to multiple third flow channels 303.

[0093] The first section 3011 and the second section 3012 may refer to two independent flow channels, and together form the first flow channel 301 by being connected to each other.

[0094] The first flow channel 301 of the above structure is adopted. No matter the first flow channel 301 is configured for inputting heat exchange medium or for outputting heat exchange medium, the flow path length of the heat exchange medium can be extended through the cooperation of the first section 3011 and the second section 3012, thereby playing a role in adjusting the heat exchange path length of the heat exchange medium in the heat exchange component 30.

[0095] refer to Figure 6 , the first channel 301 is configured to output the heat exchange medium, the first interface 301a is the outlet, the second channel 302 is configured to input the heat exchange medium, and the second interface 302a is the inlet. The heat exchange medium passing through the first channel 301, the second channel 302 and a third channel 303 can be understood as a circulation branch of the heat exchange medium. The heat exchange component 30 is located at one end of the first direction X and the side where the first interface 301a and the second interface 302a are set is the starting side of the heat exchange medium circulation, and the other end located in the first direction X is the terminal side. In the direction from the starting side to the terminal side, the circulation branches formed by multiple third channels 303 can be respectively recorded as branch No. 1, branch No. 2, branch No. 3... branch No. N, where branch No. 1 is close to the starting side and branch No. N is close to the terminal side. After flowing out of the third flow channel 303 , the heat exchange medium needs to first flow along the second section 3012 for a distance, then flow into the first section 3011 , and finally flow out from the first interface 301 a .

[0096] In the above example, the heat exchange medium of branch No. 1 will not flow out directly from the first interface 301a, but needs to take a "detour" first, that is, first pass through a second section 3012, then enter the first section 3011, and finally flow out from the first interface 301a, so that the path length of the heat exchange medium in branch No. 1 can be increased. Similarly, the path length of the heat exchange medium in branch No. 2 is also increased, but because there is a distance difference between the third flow channel 303 of branch No. 2 and branch No. 1 in the first direction X, the distance of the second section 3012 through which branch No. 2 flows is reduced compared to branch No. 1, so the difference in path length between branch No. 2 and branch No. 1 will not be too large, and can even be equal in length. By analogy, the difference in path lengths of branch No. 1, branch No. 2, branch No. 3...branch No. N can be properly balanced, and the difference in path lengths between each other is relatively small, so that the flow rates of the heat exchange medium of branch No. 1, branch No. 2, branch No. 3...branch No. N can be relatively small. Multiple circulation branches have approximately the same or identical heat exchange medium flow rates, and thus have approximately the same or identical heat exchange amount, which is beneficial to improving the heat exchange uniformity of multiple third flow channels 303 to the battery cell assembly 20, and reducing the risk of large differences in heat exchange amounts among multiple battery cells 21.

[0097] In the above technical scheme, the first flow channel 301 using the above structure can balance the path lengths of multiple circulation branches inside the heat exchange component 30, which is beneficial to reducing the difference in the path lengths of the multiple circulation branches, thereby making the flow difference of the heat exchange medium in the circulation branches where different third flow channels 303 are located smaller, which is beneficial to improving the heat exchange uniformity at the locations where the multiple third flow channels 303 are located, reducing the risk of large temperature difference when the heat exchange component 30 exchanges heat with the battery cell assembly 20, which can improve the heat exchange uniformity of the heat exchange component 30 and is beneficial to improving the reliability of the battery device 100.

[0098] In some embodiments of the present application, reference Figure 6 A connecting port 301b is formed at a position where the first section 3011 and the second section 3012 are connected. A plurality of connecting ports 301b are provided in the first direction X. A first interface 301a is provided at one end of the first section 3011 located in the first direction X.

[0099] Compared with setting one communication port 301b, a plurality of communication ports 301b can be used to adjust the path length of the circulation branch more flexibly. Figure 6, the number of connecting ports 301b is set to three, and in the direction from the starting side to the end side, the three connecting ports 301b are respectively recorded as connecting port No. 1, connecting port No. 2 and connecting port No. 3. For the circulation branch located between connecting port No. 1 and connecting port No. 2, the heat exchange medium in the third flow channel 303 of each circulation branch can flow from connecting port No. 1 to the first section 3011, or from connecting port No. 2 to the first section 3011. This can further adjust the path length of the circulation branch, and then adjust the flow rate of the heat exchange medium in the circulation branch. Similarly, for the circulation branch located between connecting port No. 2 and connecting port No. 3, the path length of the circulation branch and the flow rate of the heat exchange medium can also be adjusted in the above manner. Among them, the number of connecting ports 301b can be but not limited to two, three, four, etc., and no specific restrictions are made here.

[0100] In the above technical solution, the above structure can better adjust and balance the path lengths of multiple circulation branches inside the heat exchange component 30 and the flow rate of the heat exchange medium, further reduce the difference in the path lengths of the multiple circulation branches, and reduce the flow rate difference of the heat exchange medium in different circulation branches. The heat exchange uniformity at the locations of the multiple third flow channels 303 can be further improved, reducing the risk of large temperature differences during heat exchange in the heat exchange component 30, improving the heat exchange uniformity of the heat exchange component 30, and helping to further improve the reliability of the battery device 100.

[0101] In some embodiments of the present application, the opening size of at least part of the plurality of communication openings 301 b is adjustable.

[0102] Among the multiple communication ports 301b, the opening size of some of the communication ports 301b can be adjusted, or the opening size of all the communication ports 301b can be adjusted. Among them, the communication ports 301b can be provided with corresponding regulating valves to adjust the opening size. With this scheme, the opening size of the communication ports 301b can be flexibly adjusted. Different communication ports 301b can also be directly provided with holes of different sizes according to needs, thereby reducing the number of parts and reducing costs. Among them, the opening size of the communication port 301b can be adjusted to a closed state at the minimum. A baffle can also be provided in the communication port 301b to play a role in adjusting the opening size. For example, a welding rod can be provided in the communication port 301b, and the opening size of the communication port 301b can be adjusted by welding welding rods of different sizes or quantities.

[0103] In combination with the above, taking the circulation branch located between the No. 1 connection port and the No. 2 connection port as an example, by adjusting the opening size of the No. 1 connection port and the No. 2 connection port, the flow resistance of the heat exchange medium passing through it can be controlled, thereby enabling the heat exchange medium of the third flow channel 303 at a certain position to be distributed according to a certain proportion and flow to the No. 1 connection port and the No. 2 connection port respectively. For example, when the opening of the No. 1 connection port is smaller than the opening of the No. 2 connection port, the heat exchange medium in the multiple third flow channels 303 located between the No. 1 connection port and the No. 2 connection port will flow to the position with smaller flow resistance, thereby further extending the path length of the circulation branch near the starting side, so that the difference in path length and flow rate between the circulation branch near the starting side and the circulation branch near the end side will not be too large.

[0104] In other words, the above method can further adjust the path length and flow rate of branch No. 1, branch No. 2, branch No. 3...branch No. N, so as to achieve a better balancing effect and improve the uniformity of heat exchange.

[0105] In the above technical solution, the flow resistance of different connecting ports 301b between the first section 3011 and the second section 3012 can be adjusted through the above structure, and then the flow direction of different circulation branches can be adjusted, thereby adjusting the path length and flow rate of the circulation branch, further reducing the difference in path length and flow rate of different circulation branches in the heat exchange component 30, improving the heat exchange uniformity of the heat exchange component 30, improving the reliability of the battery cell assembly 20, and thereby improving the reliability of the battery device 100.

[0106] In some embodiments of the present application, reference Figure 6 A first opening 303a is formed at a position where each third flow channel 303 is connected to the first flow channel 301, and a second opening 303b is formed at a position where the third flow channel 303 is connected to the second flow channel 302. The opening sizes of at least some of the first openings 303a and the second openings 303b of the multiple third flow channels 303 are adjustable.

[0107] Reference Figure 5 The first flow channel 301 may not be segmented, but may be constructed as a wider flow channel. The heat exchange medium in the first flow channel 301 may be directly diverted to different third flow channels 303, or a plurality of third flow channels 303 may directly converge the heat exchange medium to the first flow channel 301. Figure 6 , the first flow channel 301 can also be arranged in sections, namely including a first section 3011 and a second section 3012. It can be understood that whether Figure 5 The example solution is Figure 6 In the exemplary embodiment, the opening sizes of at least a portion of the first openings 303a and the second openings 303b of the plurality of third flow channels 303 are adjustable.

[0108] The opening sizes of some of the first openings 303a and the second openings 303b of the plurality of third flow channels 303 may be adjustable. The opening sizes of all of the first openings 303a and the second openings 303b of the plurality of third flow channels 303 may also be adjustable.

[0109] Among them, the opening size of the first opening 303a and the second opening 303b can be adjusted to a closed state at the minimum. It can be understood that according to different requirements for heat exchange capacity of different battery devices 100, some battery devices 100 may not require strong heat exchange capacity, so the first opening 303a and the second opening 303b of part of the third flow channel 303 can be adjusted to a closed state to reduce the number of circulation branches, and then appropriately adjust the heat exchange capacity of the heat exchange component 30 to meet different usage requirements of the battery device 100.

[0110] Reference Figure 5 Example scenario ( Figure 5 The line with an arrow in the middle is the flow direction of the heat exchange medium). For this relatively simple heat exchange medium diversion scheme, the opening size of at least part of the first opening 303a and the second opening 303b of the plurality of third flow channels 303 can be adjusted to reduce the difference in the path length and flow rate of different circulation branches. For example, in the direction from the starting side to the end side, the multiple circulation branches formed inside the heat exchange component 30 are branch No. 1, branch No. 2, branch No. 3... branch No. N, and the path lengths gradually increase, among which the path length of branch No. 1 is the smallest. At this time, the openings of the first opening 303a and the second opening 303b in branch No. 1, branch No. 2, branch No. 3... branch No. N can be gradually reduced, and the openings of the first opening 303a and the second opening 303b of branch No. 1 are the largest, and the openings of the first opening 303a and the second opening 303b of branch No. N are the smallest. In this example scheme, the opening sizes of the first port 303a and the second port 303b of each circulation branch can be configured to keep the flow rates of the heat exchange medium flowing through branch No. 1, branch No. 2, branch No. 3...branch No. N small or equal, so that the heat exchange capacities of branch No. 1, branch No. 2, branch No. 3...branch No. N can be kept small or consistent, thereby improving the uniformity of heat exchange.

[0111] Reference Figure 6 Example scenario ( Figure 6The arrowed line in the middle indicates the flow direction of the heat exchange medium). For this relatively complex heat exchange medium diversion scheme, combined with the above explanation, by adjusting the opening size of at least part of the first opening 303a and the second opening 303b of the plurality of third flow channels 303, the flow rate of the heat exchange medium flowing through the No. 1 branch, the No. 2 branch, the No. 3 branch... the No. N branch can also be kept at a small difference or remain equal. Alternatively, the opening size of at least part of the plurality of connecting openings 301b can be adjusted, and the first opening 303a, the second opening 303b and the connecting opening 301b cooperate to adjust the opening size, so that the flow rate of the heat exchange medium flowing through the No. 1 branch, the No. 2 branch, the No. 3 branch... the No. N branch can be kept at a small difference or remain equal.

[0112] In the above technical scheme, the flow resistance of different third flow channels 303 can be adjusted through the above scheme, which is beneficial to accurately adjust the flow distribution of the heat exchange medium in different third flow channels 303, so that the flow difference of multiple circulation branches in the heat exchange component 30 is relatively small or the flow remains equal, and the heat exchange capacity of multiple circulation branches can be kept roughly the same or the same, which is beneficial to further improve the heat exchange uniformity of the heat exchange component 30, reduce the risk of large temperature difference after heat exchange in the battery cell assembly 20, improve the reliability of the battery cell assembly 20, and improve the reliability of the battery device 100.

[0113] In some embodiments of the present application, reference Figure 7 A connecting port 301b is formed at a position where the first section 3011 and the second section 3012 are connected. The connecting port 301b is arranged at one end of the first section 3011 located in the first direction X, and the first interface 301a is arranged at the other end of the first section 3011 located in the first direction X.

[0114] Combination Figure 7 , the end of the heat exchange component 30 located at one end of the first direction X and provided with the first interface 301a and the second interface 302a can be called the starting side, and the other end located in the first direction X can be called the terminal side, wherein the connecting port 301b is located at the terminal side of the heat exchange component 30. In the direction from the starting side to the terminal side, the circulation branches where the multiple third flow channels 303 are located are respectively recorded as branch No. 1, branch No. 2, branch No. 3... branch No. N. In the above example solution, the path lengths of branch No. 1, branch No. 2, branch No. 3... branch No. N can be kept equal, thereby keeping the flow rate of the heat exchange medium of the multiple circulation branches equal, and the heat exchange amount equal, which is conducive to ensuring heat exchange uniformity.

[0115] In the above technical solution, the first flow channel 301 of the above structure is conducive to keeping the path lengths of multiple circulation branches inside the heat exchange component 30 equal, so that each circulation branch can have equal flow and the same heat exchange capacity. The heat exchange component 30 has better heat exchange uniformity for the battery cell assembly 20, and can also simplify the structure of the first flow channel 301, thereby simplifying the overall structure of the heat exchange component 30 and reducing costs.

[0116] In some embodiments of the present application, reference Figure 7 ( Figure 7 The arrowed line represents the flow direction of the heat exchange medium), and the first interface 301a is configured as an inlet for inputting the heat exchange medium.

[0117] It is understandable that the heat exchange medium can enter the first section 3011 through the first interface 301a, flow to the end side of the heat exchange component 30, and then enter the second section 3012 through the connecting port 301b, and be divided into different third flow channels 303 in sequence along the extension direction of the second section 3012, and finally converge and discharge from the second flow channel 302. In this solution, the heat exchange medium can always flow along the direction of the flow path and be distributed to multiple third flow channels 303 in sequence, the risk of convection or series flow is relatively small, and the flow path stability and reliability of each circulation branch are relatively good.

[0118] In the above technical solution, the first flow channel 301 is the flow channel for inputting heat exchange medium, and the heat exchange medium can be distributed to different third flow channels 303 along the flow direction. When the path lengths of multiple circulation branches are equal, the risk of convection or cross-flow can be reduced, which is beneficial to improving the stability and reliability of each circulation branch, thereby enabling multiple circulation branches to operate normally, improving the heat exchange reliability and uniformity, and thereby helping to improve the reliability of the battery cell assembly 20 and the reliability of the battery device 100.

[0119] In some embodiments of the present application, the first interface 301a is configured as an outlet for outputting a heat exchange medium, a first opening 303a is formed at a position where each third flow channel 303 is connected to the first flow channel 301, and a second opening 303b is formed at a position where the third flow channel 303 is connected to the second flow channel 302, and the opening sizes of at least some of the first openings 303a and the second openings 303b of the multiple third flow channels 303 are adjustable.

[0120] The opening sizes of the first openings 303a and the second openings 303b of some of the third flow channels 303 are adjustable; or, the opening sizes of the first openings 303a and the second openings 303b of the third flow channels 303 are adjustable.

[0121] In the above scheme, the heat exchange medium will enter the second flow channel 302 through the second interface 302a, and will be distributed to multiple third flow channels 303 in sequence in the first direction X. By setting the opening sizes of the first opening 303a and the second opening 303b of the third flow channel 303 to be adjustable, the flow resistance of the third flow channel 303 can be adjusted. Since the heat exchange medium is more likely to flow to a place with smaller flow resistance, this helps to reduce the risk of the heat exchange medium in the next third flow channel 303 flowing back along the second section 3012 to the previous third flow channel 303, thereby reducing the probability of convection or series flow, which is beneficial to improving the stability and reliability of the circulation branch.

[0122] In the above technical solution, when the first interface 301a is configured as an outlet for outputting the heat exchange medium, by setting the opening size of at least part of the first openings 303a and the second openings 303b of the multiple third flow channels 303 to be adjustable, it is beneficial to reduce the risk of convection or cross-flow between different circulation branches, and can improve the stability and reliability of the circulation branches, improve the heat exchange reliability and uniformity, and thus help to improve the reliability of the battery cell assembly 20 and the reliability of the battery device 100.

[0123] In some embodiments of the present application, a first opening 303a is formed at the position where each third channel 303 is connected to the first channel 301, and a second opening 303b is formed at the position where the third channel 303 is connected to the second channel 302. The first opening 303a and the second opening 303b are diamond-shaped holes or waist-shaped holes.

[0124] In the above technical solution, the first opening 303a and the second opening 303b may be diamond-shaped holes; or, referring to Figure 8 and Fig. 9 The first opening 303a and the second opening 303b may also be waist-shaped holes. The shapes of the first opening 303a and the second opening 303b may be the same or different. For example, one of the first opening 303a and the second opening 303b may be a diamond-shaped hole and the other may be a waist-shaped hole.

[0125] In the above technical solution, by setting the first opening 303a and the second opening 303b as holes of the above shape, the structure is simple and easy to process and manufacture, which can reduce the manufacturing cost.

[0126] In some embodiments of the present application, a first opening 303a is formed at a position where each third flow channel 303 is connected to the first flow channel 301, and a second opening 303b is formed at a position where the third flow channel 303 is connected to the second flow channel 302, and some of the first openings 303a and the second openings 303b in the multiple third flow channels 303 are provided with blocking members.

[0127] The blocking piece can be understood to refer to a plug or a blockage, etc., and can be but not limited to a rubber piece, a wooden piece, etc.

[0128] It is understandable that the battery device 100 may have different temperature requirements according to different usage requirements. For some battery devices 100 with lower temperature requirements, the number of circulation branches inside the heat exchange component 30 can be reduced by setting a sealing member at the first opening 303a and the second opening 303b of part of the third flow channel 303. This can adjust the heat exchange performance of the heat exchange component 30. Moreover, since the circulation branches are reduced, the total amount of heat exchange medium introduced is also reduced, which can effectively reduce the weight of the heat exchange component 30, and thus reduce the overall weight of the battery device 100.

[0129] In this technical solution, some of the multiple third flow channels 303 can remain in a closed state, thereby reducing the number of circulation branches. The heat exchange capacity of the heat exchange component 30 can be adjusted as needed to meet the usage requirements of different battery devices 100, and the overall circulation volume of the heat exchange medium can be reduced, which is beneficial to reducing the weight of the battery device 100 and improving the energy density.

[0130] In some embodiments of the present application, reference Figures 4 to 7 The first interface 301a and the second interface 302a are arranged at the same end of the heat exchange component 30 in the first direction X.

[0131] The heat exchange component 30 is either arranged inside the box 10 or outside the box 10. Regardless of the method, the first interface 301a and the second interface 302a can be connected to the external pipeline through a shorter path by using the above structure, which can simplify the internal structure of the battery device 100 and save space. The first interface 301a and the second interface 302a can also be arranged in this way so that the heat exchange medium can flow through the multiple third flow channels 303 in an orderly manner, which is conducive to the reasonable distribution of the heat exchange medium and stable and predictable heat exchange.

[0132] In the above technical solution, the first interface 301a and the second interface 302a are located on the same side, which is more convenient for connection with the external heat exchange medium supply and recovery system in terms of pipeline layout, reducing the complexity of pipeline layout, and facilitating centralized management and monitoring of the inlet and outlet of the heat exchange medium, which is beneficial to the normal operation of the thermal management of the battery device 100.

[0133] In some embodiments of the present application, reference Fig.10 The heat exchange component 30 is located in the accommodating space 10 a and is disposed on the bottom wall 1011 of the box body 10 .

[0134] In the above technical solution, the heat exchange component 30 can be arranged at the bottom of the battery cell assembly 20 and located in the box 10, so that the heat exchange component 30 can be better protected, the risk of damage to the heat exchange component 30 when a mechanical impact occurs is reduced, and the reliability of the heat exchange component 30 is improved. The heat exchange component 30 and the bottom wall 1011 of the box 10 can also jointly protect the battery cell assembly 20 by adopting the above solution, reduce the risk of external sharp objects piercing the battery cell 21 when a mechanical impact occurs, thereby improving the reliability of the battery cell assembly 20 and the reliability of the battery device 100.

[0135] In some embodiments of the present application, reference Fig.11 The box body 10 includes a box body body 101 and a box cover 102. The box body body 101 has a first opening at one end located in the third direction Z and a second opening at the other end. The box cover 102 is closed at the first opening, and the heat exchange component 30 is closed at the second opening.

[0136] The third direction Z may refer to a direction perpendicular to the first direction X and the second direction Y. For example, the first direction X may be the length direction of the battery cell assembly 20 , the second direction Y may be the width direction of the battery cell assembly 20 , and the third direction Z may be the height direction of the battery cell assembly 20 .

[0137] In the above technical solution, the heat exchange component 30 can be integrated on the box body 10 to form an integral part with the box body 10. This can reduce the number of components and reduce the weight of the battery device 100 while taking into account the heat exchange function and the protection function, thereby improving the energy density of the battery device 100.

[0138] In some embodiments of the present application, reference Figure 4 The heat exchange component 30 includes a first heat exchange part 31, a second heat exchange part 32 and a third heat exchange part 33. The first heat exchange part 31 extends along the first direction X, and is hollow inside and has a first flow channel 301 formed therein; the second heat exchange part 32 extends along the first direction X, and is hollow inside and has a second flow channel 302 formed therein; the third heat exchange part 33 extends along the first direction X, and is connected between the first heat exchange part 31 and the second heat exchange part 32, and a plurality of third flow channels 303 are formed inside the third heat exchange part 33.

[0139] The first heat exchange portion 31 and the second heat exchange portion 32 may be long strip-shaped portions of the heat exchange component 30 extending along the first direction X. The third heat exchange portion 33 may be a plate-shaped portion of the heat exchange component 30 extending along the first direction X.

[0140] In the above technical scheme, by dividing the heat exchange component 30 into three parts, and each part forms a corresponding flow channel structure, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be manufactured in a targeted and orderly manner, so as to process the first flow channel 301, the second flow channel 302 and the third flow channel 303, which is conducive to clarifying the structure of each part of the heat exchange component 30, thereby reducing the manufacturing difficulty, improving the manufacturability of the heat exchange component 30, and helping to improve product quality.

[0141] In some embodiments of the present application, the first heat exchange portion 31 , the second heat exchange portion 32 and the third heat exchange portion 33 are spliced ​​and connected to each other.

[0142] That is to say, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be separate parts, and after being manufactured and formed separately, they are assembled together to form the heat exchange part 30. Among them, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be spliced ​​and connected to each other by, but not limited to, friction welding, arc welding, etc., so that the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be connected to form the heat exchange part 30 of an integrated structure. Furthermore, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be polished after welding to improve the overall molding quality.

[0143] For example, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be profiles, and the interior of the profiles is hollow to form corresponding flow channels. The first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 can be made of metal or non-metal materials, and no specific restrictions are made here.

[0144] In the above technical solution, the heat exchange component 30 can be a split structure, and is formed by splicing and combining the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33. This can reduce the overall processing difficulty of the heat exchange component 30, improve manufacturability, and help improve product yield and reduce manufacturing costs.

[0145] In some embodiments of the present application, reference Figure 4 The first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 are tube profiles, and the heat exchange component 30 also includes a first end plate 34 and a second end plate 35. The first end plate 34 and the second end plate 35 are arranged at both ends of the third heat exchange part 33 in the first direction X, and connect the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33.

[0146] The first end plate 34 and the second end plate 35 may refer to plate-like components. Since the first heat exchange portion 31, the second heat exchange portion 32 and the third heat exchange portion 33 are spliced ​​together to form the heat exchange portion 30, the first heat exchange portion 31, the second heat exchange portion 32 and the third heat exchange portion 33 are connected by the first end plate 34 and the second end plate 35, the heat exchange portion 30 as a whole may form a frame structure with high rigidity and strength, thereby improving the reliability of the heat exchange portion 30.

[0147] In some embodiments of the present application, the third heat exchange part 33 is an integrally formed part. That is, the third heat exchange part 33 may be manufactured by, but not limited to, integral casting, integral injection molding, or 3D printing, etc. For example, the third heat exchange part 33 may be integrally extruded from a profile.

[0148] In the above technical solution, the third heat exchange part 33 adopting the above structure has better integrity, which can reduce the assembly steps and improve the assembly efficiency. Moreover, the third heat exchange part 33 with an integral structure has higher rigidity and structural strength, which can reduce the risk of damage and thus has higher reliability.

[0149] In some embodiments of the present application, reference Figure 4 The third heat exchange part 33 includes a plurality of split parts 331 , each of which has one or more third flow channels 303 formed therein, and the plurality of split parts 331 are sequentially arranged in the first direction X and spliced ​​together.

[0150] The third heat exchange part 33 may be a split structure, and is composed of a plurality of split parts 331, and a third flow channel 303 may be provided inside each split part 331, or a plurality of third flow channels 303 may be provided at the same time. Any two adjacent split parts 331 may be connected by means including but not limited to friction welding, arc welding, bolt connection, clamping, etc.

[0151] For example, the split part 331 may be a profile, with a plurality of third flow channels 303 formed inside, and any two adjacent profiles may be connected by friction welding. The split part 331 may be, but not limited to, square or rectangular.

[0152] In the above technical solution, the third heat exchange part 33 can be a split structure. Compared with making a third heat exchange part 33 of a larger size as a whole, by configuring the third heat exchange part 33 to include a plurality of split parts 331, the size of each split part 331 is relatively small, the manufacturing difficulty is relatively low, and the quality of the finished product is relatively easy to control, thereby reducing the overall manufacturing difficulty of the third heat exchange part 33, reducing manufacturing costs, and also helping to improve product yield.

[0153] In some embodiments of the present application, a dimension of the third heat exchange portion 33 in the first direction X is less than or equal to 1000 mm.

[0154] It can be understood that since the third heat exchange part 33 is composed of a plurality of split parts 331, by controlling the size of the third heat exchange part 33 in the first direction X to be less than or equal to 1000 mm, the third heat exchange part 33 composed of a plurality of split parts 331 can have higher structural rigidity and strength while meeting good manufacturability, which is beneficial to improving the reliability of the third heat exchange part 33.

[0155] In some embodiments of the present application, the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 are integrally formed. That is, the heat exchange component 30 is an integrally formed part, and the third heat exchange part 33 can be manufactured by methods including but not limited to integral casting, integral injection molding or 3D printing.

[0156] In the above technical solution, the above structure can improve the overall rigidity and strength of the heat exchange component 30, reduce the risk of deformation or damage of the heat exchange component 30, and reduce the possible joints between the components, thereby reducing the probability of weak links. The reliability of the heat exchange component 30 can be improved, and the overall reliability of the battery device 100 can be improved.

[0157] The embodiment of the present application further provides an electric device 1000 , comprising the battery device 100 as described in any of the above embodiments.

[0158] In the above technical solution, since the battery device 100 has good heat exchange uniformity, the battery device 100 has good reliability. The use of the battery device 100 can improve the power reliability of the power device 1000, thereby improving the reliability of the power device 1000.

[0159] A specific embodiment of the battery device 100 of the present application is described below with reference to the accompanying drawings.

[0160] Example 1

[0161] Reference Figure 4 and Figure 5 A battery device 100 provided in an embodiment of the present application includes: a box body 10, a battery cell assembly 20, and a heat exchange component 30.

[0162] The housing 10 has a receiving space 10 a. The battery cell assembly 20 is disposed in the receiving space 10 a and includes a plurality of battery cells 21 extending along a first direction X.

[0163] The heat exchange component 30 is located in the accommodating space 10a and is arranged on the bottom wall 1011 of the box body 10. The heat exchange component 30 is used for heat exchange with multiple battery cells 21. A first flow channel 301, a second flow channel 302 and a third flow channel 303 are arranged inside the heat exchange component 30. The first flow channel 301 is provided with a first interface 301a, and the first interface 301a is used to input a heat exchange medium. The second flow channel 302 is provided with a second interface 302a, and the second interface 302a is used to output a heat exchange medium. The first interface 301a and the second interface 302a are arranged at the same end of the heat exchange component 30 in the first direction X. The first flow channel 301 and the second flow channel 302 extend along the first direction X and are arranged at intervals in the second direction Y, and the second direction Y is perpendicular to the first direction X. A plurality of third flow channels 303 are provided in the first direction X, each of which extends along the second direction Y, and the two ends of the plurality of third flow channels 303 in the second direction Y are respectively connected to the first flow channel 301 and the second flow channel 302.

[0164] Among them, a first opening 303a is formed at the position where each third flow channel 303 is connected to the first flow channel 301, and a second opening 303b is formed at the position where it is connected to the second flow channel 302. The opening sizes of at least some of the first openings 303a and the second openings 303b of the multiple third flow channels 303 are adjustable.

[0165] The heat exchange component 30 includes a first heat exchange part 31, a second heat exchange part 32, a third heat exchange part 33, a first end plate 34 and a second end plate 35. The first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33 are profiles, wherein the first heat exchange part 31 extends along the first direction X, and is hollow inside and has a first flow channel 301 formed therein; the second heat exchange part 32 extends along the first direction X, and is hollow inside and has a second flow channel 302 formed therein; the third heat exchange part 33 extends along the first direction X, and connects the first heat exchange part 31 and the second heat exchange part 32, and a plurality of third flow channels 303 are formed inside the third heat exchange part 33. The first end plate 34 and the second end plate 35 are disposed at both ends of the third heat exchange part 33 in the first direction X, and connect the first heat exchange part 31, the second heat exchange part 32 and the third heat exchange part 33.

[0166] The first heat exchange part 31, the second heat exchange part 32, the third heat exchange part 33, the first end plate 34 and the second end plate 35 are connected to each other by welding. The third heat exchange part 33 includes a plurality of split parts 331, each of which is a relatively small profile, and a plurality of third flow channels 303 are formed inside each of the split parts 331. The plurality of split parts 331 are sequentially arranged in the first direction X and connected by butt welding.

[0167] Example 2

[0168] Reference Figure 6The structure of a battery device 100 provided in the embodiment of the present application is substantially the same as the structure of the battery device 100 in Embodiment 1, except that:

[0169] The first flow channel 301 includes a first section 3011 and a second section 3012 that are connected to each other. The second section 3012 and the first section 3011 both extend along the first direction X and are arranged side by side in the second direction Y. The second section 3012 is closer to the third flow channel 303 than the first section 3011 and is connected to a plurality of third flow channels 303. A connecting port 301b is formed at a position where the first section 3011 and the second section 3012 are connected. A plurality of connecting ports 301b are provided in the first direction X. A first interface 301a is provided at one end of the first section 3011 located in the first direction X.

[0170] The opening sizes of at least some of the multiple communication openings 301b are adjustable.

[0171] Example 3

[0172] Reference Figure 7 The structure of a battery device 100 provided in the embodiment of the present application is substantially the same as the structure of the battery device 100 in Embodiment 1, except that:

[0173] The first flow channel 301 includes a first section 3011 and a second section 3012 which are connected to each other. The second section 3012 and the first section 3011 both extend along the first direction X and are arranged side by side in the second direction Y. The second section 3012 is closer to the third flow channel 303 than the first section 3011 and is connected to multiple third flow channels 303.

[0174] A connecting port 301b is formed at a position where the first section 3011 and the second section 3012 are connected. The connecting port 301b is arranged at one end of the first section 3011 located in the first direction X. The first interface 301a is arranged at the other end of the first section 3011 located in the first direction X, and the first interface 301a is configured as an inlet for inputting a heat exchange medium.

[0175] It should be noted that, in the absence of conflict, the embodiments in the present application and the features in the embodiments can be combined with each other. The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, if there is no special explanation, all the embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution. If there is no special explanation, all the technical features and optional technical features of the present application can be combined with each other to form a new technical solution. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A box body, wherein the box body has a containing space; A battery cell assembly, the battery cell assembly being arranged in the accommodation space and comprising a plurality of battery cells; A heat exchange component, which is used for heat exchange with the multiple battery cells, and a first flow channel, a second flow channel and a third flow channel are provided inside the heat exchange component, the first flow channel is provided with a first interface, the second flow channel is provided with a second interface, the first flow channel and the second flow channel extend along a first direction and are arranged at intervals in a second direction, the second direction is perpendicular to the first direction, a plurality of third flow channels are provided in the first direction, each of the third flow channels extends along the second direction, and at least some of the plurality of third flow channels are located in the second direction. Both ends are connected to the first flow channel and the second flow channel respectively.

2. The battery device according to claim 1, characterized in that: The first flow channel includes a first section and a second section which are interconnected. The first section is provided with the first interface. The second section and the first section both extend along the first direction and are arranged side by side in the second direction. The second section is closer to the third flow channel than the first section and is connected to a plurality of the third flow channels.

3. The battery device according to claim 2, characterized in that: A communication port is formed at a position where the first section and the second section are connected, a plurality of the communication ports are provided in the first direction, and the first interface is provided at one end of the first section located in the first direction.

4. The battery device according to claim 3, characterized in that: The opening sizes of at least some of the plurality of communication openings are adjustable.

5. The battery device according to any one of claims 1 to 4, characterized in that: A first opening is formed at a position where each of the third flow channels communicates with the first flow channel, and a second opening is formed at a position where each of the third flow channels communicates with the second flow channel. The opening sizes of the first openings and the second openings of at least some of the plurality of third flow channels are adjustable.

6. The battery device according to claim 2, characterized in that: A communication port is formed at a position where the first section and the second section are connected. The communication port is provided at one end of the first section located in the first direction, and the first interface is provided at the other end of the first section located in the first direction.

7. The battery device according to claim 5, characterized in that: The first interface is configured as an inlet for inputting a heat exchange medium.

8. The battery device according to claim 1, characterized in that: The first interface is configured as an outlet for outputting heat exchange medium, a first opening is formed at a position where each of the third flow channels is connected to the first flow channel, and a second opening is formed at a position where each of the third flow channels is connected to the second flow channel, and the opening sizes of the first openings and the second openings of at least some of the multiple third flow channels are adjustable.

9. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: A first opening is formed at a position where each of the third channels communicates with the first channel, and a second opening is formed at a position where each of the third channels communicates with the second channel. The first opening and the second opening are diamond-shaped holes or waist-shaped holes.

10. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: A first opening is formed at a position where each of the third flow channels communicates with the first flow channel, and a second opening is formed at a position where each of the third flow channels communicates with the second flow channel. A blocking member is provided at some of the first openings and the second openings in the plurality of third flow channels.

11. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: The first interface and the second interface are arranged at the same end of the heat exchange component in the first direction.

12. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: The heat exchange component is located in the accommodating space and is arranged on the bottom wall of the box body.

13. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: The box body includes a box body body and a box cover. The box body body has a first opening at one end in the third direction and a second opening at the other end. The box cover is closed at the first opening, and the heat exchange component is closed at the second opening.

14. The battery device according to any one of claims 1 to 4 and 6 to 8, characterized in that: The heat exchange component comprises: A first heat exchange portion extending along the first direction and having a hollow interior and the first flow channel formed therein; A second heat exchange portion extending along the first direction and having a hollow interior and formed with the second flow channel; The third heat exchange part extends along the first direction and connects the first heat exchange part and the second heat exchange part. A plurality of third flow channels are formed inside the third heat exchange part.

15. The battery device according to claim 14, characterized in that: The first heat exchange part, the second heat exchange part and the third heat exchange part are spliced ​​and connected to each other.

16. The battery device according to claim 15, characterized in that: The third heat exchange part is an integrally formed part.

17. The battery device according to claim 15, characterized in that: The third heat exchange part includes a plurality of split parts, each of which has one or more third flow channels formed inside, and the plurality of split parts are arranged in sequence in the first direction and are spliced ​​and connected.

18. The battery device according to claim 14, characterized in that: The first heat exchange portion, the second heat exchange portion and the third heat exchange portion are integrally formed.

19. An electrical device, characterized in that: A battery device comprising the battery device as claimed in any one of claims 1 to 18.

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