Battery device and electric device

Abstract

The utility model discloses a battery device and a power utilization device. The battery device comprises a box body; a battery cell assembly accommodated in the case; the heat exchange assembly is contained in the box body and exchanges heat with the battery monomer assembly, and the heat exchange assembly comprises a heat exchange main body which comprises a plurality of heat exchange runners; the flow collecting structures are arranged at the two ends, located in the first direction, of the heat exchange main body, each flow collecting structure comprises a plugging piece, an adapter and a flow collecting piece, each plugging piece comprises a connecting part and at least two plugging parts, the at least two plugging parts are connected through the connecting part and can be plugged in the at least two heat exchange runners, the adapter is formed on the heat exchange main body, and the flow collecting pieces are arranged on the adapter. A flow collecting cavity is formed in the flow collecting piece, the flow collecting piece is in sealing fit with and connected with the heat exchange body through the adapting piece, and the flow collecting piece is provided with a communicating opening communicating with the flow collecting cavity. According to the battery device, the installation difficulty among the heat exchange main body, the current collecting piece and the adapter piece can be reduced, the connection reliability is improved, and the reliability of the battery device is improved.

Description

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese patent applications No. 202420869133.1, filed on April 24, 2024, and No. 202410501046.5, filed on April 24, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of battery technology, and in particular to a battery device and an electrical device. Background Technology

[0004] In recent years, new energy vehicles have experienced rapid development. In the field of electric vehicles, the battery pack, as the power source, plays an irreplaceable and crucial role. A battery pack consists of a casing and multiple battery cells housed within it. During continuous charging and discharging, the battery cells generate a significant amount of heat. Heat exchange components are typically installed inside the battery pack to regulate its internal temperature. However, the reliability of these heat exchange components greatly affects the overall reliability of the battery pack. Therefore, improving the reliability of battery packs has become one of the most pressing issues to be addressed. Utility Model Content

[0005] This application provides a battery device and an electrical device that can effectively improve the reliability of heat exchange components, thereby improving the reliability of the battery device and the electrical device.

[0006] In a first aspect, embodiments of this application provide a battery device, comprising: a housing; a battery cell assembly housed within the housing; and a heat exchange assembly housed within the housing and exchanging heat with the battery cell assembly. The heat exchange assembly includes: a heat exchange body comprising a plurality of heat exchange channels extending along a first direction; and a flow collection structure disposed at both ends of the heat exchange body in the first direction. The flow collection structure includes a sealing member, a connecting member, and a flow collector. The sealing member includes a connecting portion and at least two sealing portions connected through the connecting portion, and the at least two sealing portions can seal within at least two heat exchange channels. The connecting member is formed on the heat exchange body. A flow collection cavity is formed inside the flow collector. The flow collector is sealed and connected to the heat exchange body through the connecting member, thereby connecting the flow collection cavity and the heat exchange channels. The flow collector has a connecting port connecting the flow collection cavity, which can be used for the entry and exit of heat exchange medium, so that the heat exchange medium can flow between the flow collection cavity and the heat exchange channels.

[0007] In the battery device with the above structure, by arranging the heat exchange assembly to include the heat exchange body and the current collecting structure, and arranging the current collecting structure to include the blocking piece, the current collecting piece and the adapter piece, when the heat exchange body is connected with the current collecting structure, the adapter piece is formed on the heat exchange body, and then the current collecting piece is connected, so that the current collecting piece is not directly connected with the heat exchange body, the adapter piece can more easily adapt to the size and shape of the heat exchange body in the forming process, and the size and shape of the current collecting piece can be matched in advance, thereby reducing the installation difficulty between the heat exchange body, the current collecting piece and the adapter piece, improving the connection reliability, reducing the risk of leakage, and improving the reliability of the battery device. By arranging the blocking piece to include the connecting part and the at least two blocking parts, the at least two blocking parts are connected through the connecting part, the connecting part can limit the blocking part, reduce the risk of displacement or deformation of the blocking part during the forming of the adapter piece, help to improve the sealing effect of the blocking part on the heat exchange flow channel at the position, meet the heat exchange design requirements of the heat exchange assembly, and help to improve the forming quality of the adapter piece, improve the connection strength and reliability of the adapter piece and the heat exchange body, improve the reliability of the heat exchange assembly, and also improve the reliability of the battery device.

[0008] In some embodiments of the present application, the blocking part has an outer side surface close to the current collecting piece, and on a reference surface parallel to the outer side surface, the area of the normal projection of the connecting part on the reference surface is smaller than the area of the outer side surface.

[0009] In the above technical solution, the size of the part of the connecting part corresponding to the blocking part is smaller than the size of the blocking part by using the above structure, and during the forming of the adapter piece on the heat exchange body, the material forming the adapter piece has a larger bonding surface with the outer side surface, which can improve the bonding strength and connection reliability of the blocking part, the adapter piece and the heat exchange body, enhance the blocking and sealing effect of the blocking part on the heat exchange flow channel, improve the reliability of the heat exchange assembly, and further improve the reliability of the battery device. By using the above structure, the material usage can be reduced and the weight of the blocking piece can be reduced on the basis that the at least two blocking parts form an integral part through the connecting part, which is conducive to improving the energy density of the battery device.

[0010] In some embodiments of the present application, the size of the heat exchange body in the first direction and the third direction is greater than the size in the second direction, the plurality of heat exchange flow channels are arranged at intervals along the third direction, the size of the connecting part in the second direction is smaller than the size of the blocking part, and the first direction, the second direction and the third direction are perpendicular to each other.

[0011] In the technical scheme, the heat exchange main body can form a plate-shaped structure with a small thickness, and is more easily attached to the surface of the battery monomer assembly for heat exchange, which is beneficial to save the space inside the box body, can provide a larger arrangement space for the battery monomer assembly, improve the energy density of the battery device, and can provide a larger arrangement space for other electrical components, facilitate the installation of the internal components of the box body, reduce the installation difficulty, and is beneficial to maintenance and repair. Each blocking part has an area that is not blocked by the connecting part. During the forming of the adapter on the heat exchange main body, each blocking part has a larger bonding surface with the adapter, and the blocking part has a larger bonding surface with the adapter. The connecting strength and reliability can be improved, and the edge position of each blocking part matched with the heat exchange flow channel is exposed more, and the adapter can cover more edge positions of the blocking part during the forming process, thereby enhancing the blocking and sealing effect of the blocking part on the heat exchange flow channel, and improving the reliability of the heat exchange assembly and the reliability of the battery device.

[0012] In some embodiments of the present application, the connecting part and the blocking part are detachably connected. By adopting the above scheme, the connecting part and the blocking part can be manufactured separately, and after the connecting part and the blocking part are manufactured separately, the two are assembled, thereby reducing the manufacturing difficulty of the blocking part, improving the product yield, and when one of the connecting part and the blocking part is damaged, only the damaged part needs to be replaced, thereby reducing the use cost.

[0013] In some embodiments of the present application, one of the connecting part and the blocking part is provided with a clamping protrusion, and the other is provided with a clamping groove part, and the clamping groove part and the clamping protrusion are connected by clamping connection. In the technical scheme, the connecting part and the blocking part are connected by clamping connection of the clamping groove part and the clamping protrusion. This kind of disassembly connection structure is simple, easy to install or disassemble, reliable in connection, and can improve the connection reliability of the connecting part and the blocking part.

[0014] In some embodiments of the present application, the clamping protrusion or the clamping groove part is arranged at opposite ends of the connecting part. In the technical scheme, the opposite ends of the connecting part can be connected with the blocking part by clamping connection of the clamping groove part and the clamping protrusion, thereby playing a fixing role on the opposite sides of the connecting part and the blocking part, bringing more stable and balanced fixing effect, and further improving the connection reliability of the connecting part and the blocking part.

[0015] In some embodiments of the present application, the clamping protrusion is arranged on the connecting part, and the clamping groove part is arranged on the blocking part. In the technical scheme, since the blocking part blocks in the heat exchange flow channel, considering that the adapter needs to wrap the heat exchange main body, the size of the blocking part is larger than that of the connecting part, and therefore arranging the clamping groove part on the blocking part can facilitate the processing of the clamping groove part and reduce the manufacturing difficulty.

[0016] In some embodiments of the present application, one of the connecting part and the blocking part is provided with a guide groove, and the other is provided with a guide column arranged in the guide groove. In this technical solution, the connecting part and the blocking part can be accurately positioned when connected through the guiding effect of the guide groove and the guide column, thereby improving the success rate of the clamping of the clamping convex part and the clamping groove part, and further improving the assembly efficiency.

[0017] In some embodiments of the present application, the guide column is arranged on the connecting part, and the guide groove is arranged on the blocking part. In this technical solution, since the blocking part is blocked in the heat exchange flow channel, and considering that the adapter needs to wrap the heat exchange main body, the size of the blocking part is larger than that of the connecting part. Therefore, arranging the guide groove on the blocking part can facilitate the processing of the guide groove and reduce the manufacturing difficulty.

[0018] In some embodiments of the present application, any two adjacent blocking parts are detachably connected through the connecting part.

[0019] In the above technical solution, when the number of blocking parts is large, the plurality of blocking parts can be connected in sequence through the plurality of connecting parts, the connection mode is more flexible, and each blocking part and connecting part is easier to operate during assembly, thereby reducing the assembly difficulty. When a heat exchange flow channel corresponding to a certain blocking part fails, the adjacent two blocking parts can be more accurately processed through the connecting part. Only the connecting part and the blocking part at the fault position need to be disassembled, without disassembling the connecting part and the blocking part at other positions. The operation range is relatively small, the maintenance difficulty can be reduced, the risk of interference to other normally working blocking parts is reduced, the maintenance cost and material cost are also saved. When the heat exchange capacity of the heat exchange assembly needs to be adjusted, such as adjusting the number of heat exchange flow channels participating in heat exchange, the above scheme can more conveniently start or stop a single or part of the heat exchange flow channels. The adjustment is flexible according to the actual heat exchange demand, the adjustment is less limited, and the flexible adjustment of the heat exchange flow channels in the heat exchange main body is facilitated.

[0020] In some embodiments of the present application, the connecting part comprises a first part and a second part, the first part and the second part are detachably connected, the first part is connected with one of the two adjacent blocking parts, and the second part is connected with the other of the two adjacent blocking parts.

[0021] In the above technical solution, the connecting part is arranged in a two-part structure and arranged on the two adjacent blocking parts. Thus, the two adjacent blocking parts can be detachably connected through the first part and the second part. The blocking part does not need to be provided with a structure for detachable cooperation, which can reduce the damage to the structure of the blocking part, ensure the reliability of the structure of the blocking part, and further enhance the blocking effect of the blocking part on the heat exchange flow channel. In addition, the structure of the blocking part can be simplified, and the manufacturing cost can be reduced.

[0022] In some embodiments of the present application, one of the two adjacent blocking parts is integrally formed with the first part, and the other is integrally formed with the second part. In this technical solution, by integrally forming the first part with the corresponding blocking part, the number of parts can be reduced, the assembly steps can be reduced, the assembly efficiency of the heat exchange assembly can be improved, and the first part and the corresponding blocking part can be formed into an integral structure, the overall structural strength can be improved, and the reliability of the blocking part can be improved. Integrally forming the second part with the corresponding blocking part can also reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly, and form the second part and the corresponding blocking part into an integral structure, improve the overall structural strength, and improve the reliability of the blocking part.

[0023] In some embodiments of the present application, the first part is provided with a first insertion part extending out of the blocking part, the second part is provided with a first insertion slot, the first insertion part and the first insertion slot are inserted and matched, and the first insertion part and the first insertion slot extend in the spacing direction of the at least two blocking parts. In the above technical solution, the first part can be inserted and matched with the first insertion slot of the second part through the first insertion part, so that the two adjacent blocking parts can be detachably connected. This detachable mode is simple to operate and convenient to manufacture, can improve the disassembly and assembly efficiency, and reduce the cost.

[0024] In some embodiments of the present application, the connecting part is connected to one of the two adjacent blocking parts and includes an extension part and a second insertion part. The extension part is connected to the blocking part and extends to the other of the two adjacent blocking parts. The second insertion part is provided on the extension part. The other of the two adjacent blocking parts is provided with a second insertion slot. The second insertion slot and the second insertion part are inserted and matched. In this technical solution, the two adjacent blocking parts can be connected together through the insertion and matching of the second insertion part and the second insertion slot. This detachable mode is simple to operate, and since the second insertion slot is provided on the blocking part, the combination of the connecting part and the blocking part is firm, and the connection is more reliable.

[0025] In some embodiments of the present application, the second insertion part is provided on the end of the extension part away from the current collecting part. In this technical solution, the second insertion part is provided on the end of the extension part, so that the overall structure of the connecting part can be more compact, the size of the connecting part can be reduced, and the weight can be reduced, which is beneficial to improve the energy density of the battery device.

[0026] In some embodiments of the present application, the connecting part and the corresponding blocking part are integrally formed. In this technical solution, the connecting part and the corresponding blocking part are integrally formed, which can also reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly, and form the connecting part and the corresponding blocking part into an integral structure, improve the overall structural strength, and improve the reliability of the blocking part.

[0027] In some embodiments of the present application, the connecting part and the at least two blocking parts are integrally formed.

[0028] In the technical solution, the structure can reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly, and make the connecting part and the at least two blocking parts form an integral part, thereby improving the overall structural strength and the reliability of the blocking part.

[0029] In some embodiments of the present application, the adapter is integrally injection molded on the heat exchange main body.

[0030] In the technical solution, the adapter is injection molded on the heat exchange main body, the molding speed of the adapter is relatively fast, and the adapter is easy to mass-produce automatically, thereby improving the production efficiency. In addition, the adapter has high dimensional accuracy and high surface quality, which can improve the molding quality of the adapter, improve the connection reliability between the heat exchange main body, the adapter and the current collecting part, and further improve the reliability of the battery device.

[0031] In some embodiments of the present application, the heat exchange main body is a metal material part or a non-metal material part; and / or, the current collecting part is a metal material part or a non-metal material part. In the technical solution, the heat exchange main body made of metal material has better thermal conductivity, which is conducive to improving the heat exchange efficiency. The heat exchange main body can also be made of non-metal material, which can reduce the cost while meeting the thermal conductivity performance. The current collecting part made of metal material has high rigidity and strength, which can reduce the risk of damage. The current collecting part made of non-metal material can reduce the cost while meeting the rigidity and strength. By setting the heat exchange main body and the current collecting part to the above materials, more choices can be provided, and higher flexibility can be achieved.

[0032] In a second aspect, the embodiments of the present application provide a power utilization device, which comprises the battery device according to any one of the preceding embodiments, and the battery device is used to store or provide electric energy.

[0033] In the technical solution, the battery device has high reliability, and the use of the battery device to store or provide electric energy can improve the power utilization reliability, thereby improving the use reliability of the power utilization device. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be considered as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor.

[0035] Figure 1 The structural schematic diagram of a vehicle is provided for some embodiments of the present application;

[0036] Figure 2 Exploded views of the structure of the battery device provided in some embodiments of this application;

[0037] Figure 3 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0038] Figure 4 A three-dimensional structural schematic diagram of a heat exchange component provided in some embodiments of this application;

[0039] Figure 5 A partial structural schematic diagram of a heat exchange component provided in some embodiments of this application;

[0040] Figure 6 A partial structural schematic diagram of the heat exchanger body provided in some embodiments of this application;

[0041] Figure 7 A partial internal structure diagram of a heat exchange component provided in some embodiments of this application;

[0042] Figure 8 A three-dimensional structural schematic diagram of the sealing element provided in some embodiments of this application;

[0043] Figure 9 Exploded views of the sealing components provided in some embodiments of this application;

[0044] Figure 10 A three-dimensional structural schematic diagram of a sealing component provided in another embodiment of this application;

[0045] Figure 11 Exploded view of a sealing component provided in another embodiment of this application;

[0046] Figure 12 A three-dimensional structural schematic diagram of a sealing component provided in another embodiment of this application;

[0047] Figure 13 Exploded view of the sealing component provided in another embodiment of this application;

[0048] Figure 14 for Figure 7 A magnified view of part I;

[0049] Figure 15 A three-dimensional structural schematic diagram of the adapter provided in some embodiments of this application;

[0050] Figure 16 A three-dimensional structural schematic diagram of a current collector provided in some embodiments of this application;

[0051] Figure 17 A side view of a heat exchanger body provided for some embodiments of this application.

[0052] icon:

[0053] 1000, electric device;

[0054] 100, battery device;

[0055] 10, box body; 11, first box body; 12, second box body;

[0056] 20, battery cell assembly; 21, battery cell;

[0057] 30, heat exchange assembly;

[0058] 31, heat exchange body; 301, heat exchange flow channel; 302, flow channel wall; 311, shell; 311a, arc-shaped wall; 312, partition plate;

[0059] 32, current collecting structure;

[0060] 321, plugging piece; 3211, connecting part; 3211a, avoiding groove; 3212, plugging part; 3212a, outer side surface; 3212b, second insertion slot; 3212c, circumferential side surface; 3205, first part; 32051, first insertion part; 3207, extension part; 3208, second insertion part; 3206, second part; 3206a, first insertion slot;

[0061] 322, current collecting piece; 3221, current collecting cavity; 322a, communication port; 322b, sink groove;

[0062] 323, adapter piece; 3231, weldable part;

[0063] 3201, clamping convex part; 3202, clamping groove part; 3203, guide slot; 3204, guide column;

[0064] 200, controller; 300, motor; X, first direction; Y, second direction; Z, third direction. DETAILED DESCRIPTION

[0065] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, but not all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present application.

[0066] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application. Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the relevant art and the present disclosure and will not be interpreted in an overly literal sense unless expressly so defined herein.

[0067] Reference throughout this application to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment is included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment.

[0068] In the description of the application, it is necessary to explain that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting", "attaching" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0069] The term "and / or" in this application is only a description of the association relationship between the associated objects, which means that there can be three kinds of relationships, for example, A and / or B can represent the existence of A alone, the existence of A and B together, and the existence of B alone. In addition, the character " / " in this application generally represents that the front and rear associated objects have an "or" relationship.

[0070] In the embodiments of the application, the same reference signs represent the same parts, and for the sake of brevity, the detailed description of the same parts is omitted in different embodiments. It should be understood that the thickness, length and width of various components in the embodiments of the application shown in the drawings, as well as the overall thickness, length and width of the integrated device, are only exemplary and should not constitute any limitation on the application.

[0071] "Multiple" appearing in this application means two or more (including two).

[0072] In this application, the battery cell can include lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-hydrogen battery, nickel-cadmium battery, lead-acid battery, etc. The embodiments of the present application are not limited thereto. The battery cell can be in the shape of a cylinder, a flat body, a cuboid or other shapes, etc. The embodiments of the present application are not limited thereto. The battery cell is generally divided into three types according to the packaging method: cylindrical battery cell, square battery cell and soft package battery cell, and the embodiments of the present application are not limited thereto.

[0073] The battery apparatus mentioned in the embodiments of the present application can refer to one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component. In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0074] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0075] In some embodiments, the battery apparatus can be a battery pack including a box and one or more battery cell assemblies accommodated in the box. As an example, the battery cell assembly can be a battery module, which can be accommodated in the box by fixing the battery module in the box. As an example, the battery cell assembly can also be accommodated in the box by directly fixing a plurality of battery cells in the box. The box can prevent liquid or other foreign matter from affecting the charging or discharging of the battery cell.

[0076] The battery cell comprises a shell, an electrode assembly and an electrolyte, the shell being used for accommodating the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode tab, a negative electrode tab and a separator film. The battery cell mainly relies on the movement of metal ions between the positive electrode tab and the negative electrode tab to work. The positive electrode tab comprises a positive electrode current collector and a positive electrode active material layer, the positive electrode active material layer being coated on the surface of the positive electrode current collector, the positive electrode current collector without the positive electrode active material layer protruding from the positive electrode current collector with the positive electrode active material layer, and the positive electrode current collector without the positive electrode active material layer serving as a positive electrode tab. Taking a lithium ion battery as an example, the material of the positive electrode current collector can be aluminum, and the positive electrode active material can be lithium cobaltate, lithium iron phosphate, ternary lithium or lithium manganate, etc. The negative electrode tab comprises a negative electrode current collector and a negative electrode active material layer, the negative electrode active material layer being coated on the surface of the negative electrode current collector, the negative electrode current collector without the negative electrode active material layer protruding from the negative electrode current collector with the negative electrode active material layer, and the negative electrode current collector without the negative electrode active material layer serving 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 no fusing occurs when a large current passes through, the number of positive electrode tabs is multiple and they are stacked together, and the number of negative electrode tabs is multiple and they are stacked together.

[0077] The material of the separator film can be PP (polypropylene) or PE (polyethylene) or the like. In addition, the electrode assembly can be a winding type structure or a stacking type structure, and the embodiments of the present application are not limited thereto.

[0078] In recent years, new energy vehicles have made a leap in development. In the field of electric vehicles, the battery device plays an irreplaceable important role as the power source of electric vehicles. The battery device is composed of a box body and a plurality of battery cells accommodated in the box body. The battery cells in the battery device will generate a large amount of heat in the continuous charging and discharging process. Heat exchange components are usually arranged inside the battery device to exchange heat, so as to realize temperature regulation inside the battery device. However, the reliability of the heat exchange components will greatly affect the reliability of the battery device. Therefore, how to further improve the reliability of the battery device has become one of the problems to be solved at present.

[0079] In a general battery device, a cold plate is usually arranged inside the box body to exchange heat with the battery cell assembly. The cold plate is connected to the pipeline for the inlet and outlet of the heat exchange medium through a current collecting piece. The cold plate and the current collecting piece are two independent components, both of which are made of metal and are connected by brazing process. However, the size and surface flatness of the cold plate are relatively difficult to control. The cold plate and the current collecting piece cannot be well fitted, which will affect the welding quality during welding, leading to the risk of leakage between the cold plate and the current collecting piece, affecting the heat exchange reliability of the cold plate. Moreover, the leaked heat exchange medium entering the inside of the box body is also easy to cause electrical safety hazards such as short circuit, thereby affecting the overall reliability of the battery device.

[0080] Based on the above considerations, in order to solve the problem that the reliability of the battery device is affected due to the reliability problem of the heat exchange assembly in the installation process. The applicant designs a battery device, which comprises a box body, a battery monomer assembly and a heat exchange assembly, the battery monomer assembly is accommodated in the box body; the heat exchange assembly is accommodated in the box body and exchanges heat with the battery monomer assembly, the heat exchange assembly comprises a heat exchange main body and a flow collecting structure, the heat exchange main body comprises a plurality of heat exchange flow channels extending along a first direction; the flow collecting structure is arranged at both ends of the heat exchange main body in the first direction, the flow collecting structure comprises a blocking piece, an adapter and a flow collecting piece, the blocking piece comprises a connecting part and at least two blocking parts, the at least two blocking parts are connected through the connecting part, and the at least two blocking parts can block in the at least two heat exchange flow channels, the adapter is formed on the heat exchange main body, and the flow collecting piece is internally formed with a flow collecting cavity, the flow collecting piece is sealingly connected with the heat exchange main body through the adapter, so that the flow collecting cavity and the heat exchange flow channels are communicated, the flow collecting piece is provided with a communication port communicating with the flow collecting cavity, the communication port can be used for the heat exchange medium to enter and exit, so that the heat exchange medium can flow between the flow collecting cavity and the heat exchange flow channels.

[0081] In the above-mentioned structure of the battery device, by setting the heat exchange assembly to comprise the heat exchange main body and the flow collecting structure, and the flow collecting structure comprising the blocking piece, the flow collecting piece and the adapter, when the heat exchange main body is connected with the flow collecting structure, the adapter is formed on the heat exchange main body, and then the flow collecting piece is connected, so that the flow collecting piece is not directly connected with the heat exchange main body, the adapter can more easily adapt to the size and shape of the heat exchange main body in the forming process, and can pre-match the size and shape of the flow collecting piece, thereby reducing the installation difficulty between the heat exchange main body, the flow collecting piece and the adapter, improving the connection reliability, reducing the risk of leakage, and improving the reliability of the battery device. By setting the blocking piece to comprise the connecting part and the at least two blocking parts, the at least two blocking parts are connected through the connecting part, the connecting part can limit the blocking part, reduce the risk of displacement or deformation of the blocking part in the forming process of the adapter, and is beneficial to improve the sealing effect of the blocking part on the heat exchange flow channel at the position, so as to meet the heat exchange design requirements of the heat exchange assembly, and is also beneficial to improve the forming quality of the adapter, improve the connection strength and reliability of the adapter and the heat exchange main body, improve the reliability of the heat exchange assembly, and also improve the reliability of the battery device.

[0082] The battery device disclosed in the embodiments of the present application can be used in an electric device such as a vehicle, a ship or an aircraft, but is not limited thereto. A power supply system comprising the battery device disclosed in the present application can be used to constitute the electric device.

[0083] The embodiments of the present application provide a power consumption device using a battery device as a power supply. The power consumption device can be, but is not limited to, a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric car, an electric vehicle, a ship, a spacecraft, etc. The electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc. The spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc.

[0084] The following embodiments are described by taking a power consumption device 1000 as an example of a vehicle for convenience of description. Please refer to Figure 1 , Figure 1 The power consumption device 1000 provided by some embodiments of the present application is a structural schematic diagram of a vehicle. The vehicle can be a fuel automobile, a gas automobile or a new energy automobile. The new energy automobile can be a pure electric vehicle, a hybrid electric vehicle or a range extended vehicle, etc. The vehicle is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as an operating power supply of the vehicle. The vehicle can further include a controller 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the working power demand of the vehicle during starting, navigation and driving.

[0085] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle, but also be used as a driving power supply of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0086] Please refer to Figure 2 , Figure 2An exploded view of a battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a box 10 and a plurality of battery cells 21, which are accommodated in the box 10. The box 10 is used to provide an assembly space for the battery cells 21, and the box 10 can have various structures. In some embodiments, the box 10 can include a first box body 11 and a second box body 12, the first box body 11 and the second box body 12 are overlapped with each other, and the first box body 11 and the second box body 12 together 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 structure, which is overlapped with the open side of the second box body 12 to make the first box body 11 and the second box body 12 together 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 is overlapped with the open side of the second box body 12. Of course, the box 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0087] In the battery device 100, the plurality of battery cells 21 can be connected in series, in parallel, or in a mixed manner. The mixed manner means that some of the plurality of battery cells 21 are connected in series and some are connected in parallel. The plurality of battery cells 21 can be directly connected in series, in parallel, or in a mixed manner, and then the plurality of battery cells 21 are accommodated in the box 10. Of course, the battery device 100 can also be that the plurality of battery cells 21 are first connected in series, in parallel, or in a mixed manner to form a battery module, and then a plurality of battery modules are connected in series, in parallel, or in a mixed manner to form a whole, which is accommodated in the box 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the plurality of battery cells 21.

[0088] Please refer to Figure 2 , Figure 2 A partial structure diagram of the battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a plurality of rows of battery cells 21, which are arranged along the length direction of the box 10. Each row of battery cells 21 includes a plurality of battery cells 21 arranged along the width direction of the box 10; or the plurality of rows of battery cells 21 are arranged along the width direction of the box 10, and each row of battery cells 21 includes a plurality of battery cells 21 arranged along the length direction of the box 10.

[0089] Each battery cell 21 can be a secondary battery or a primary battery, where the secondary battery refers to a battery cell 21 that can be used continuously after being discharged by means of charging to activate the active material; it can 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. The embodiments of the present application are not limited thereto. The battery cell 21 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc. For example, in the embodiments of the present application, the shape of the battery cell 21 is a cuboid. Figure 2

[0090] According to some embodiments of the present application, with reference to Figures 3 to 7 , the embodiments of the present application provide a battery device 100, comprising a box body 10, a battery cell assembly 20, and a heat exchange assembly 30. The battery cell assembly 20 is accommodated in the box body 10. The heat exchange assembly 30 is accommodated in the box body 10 and exchanges heat with the battery cell assembly 20. The heat exchange assembly 30 comprises a heat exchange main body 31 and a current collecting structure 32. The heat exchange main body 31 comprises a plurality of heat exchange flow channels 301 extending along a first direction X. The current collecting structure 32 is arranged at both ends of the heat exchange main body 31 in the first direction X. The current collecting structure 32 comprises a blocking piece 321, an adapter piece 323, and a current collecting piece 322. The blocking piece 321 comprises a connecting part 3211 and at least two blocking parts 3212. The at least two blocking parts 3212 are connected by the connecting part 3211, and the at least two blocking parts 3212 can block the at least two heat exchange flow channels 301. The adapter piece 323 is formed on the heat exchange main body 31. The current collecting piece 322 has a current collecting cavity 3221 formed inside. The current collecting piece 322 is sealingly connected with the heat exchange main body 31 through the adapter piece 323, so that the current collecting cavity 3221 and the heat exchange flow channels 301 are in communication. The current collecting piece 322 is provided with a communication port 322a communicating with the current collecting cavity 3221. The communication port 322a can be used for the inlet and outlet of the heat exchange medium, so that the heat exchange medium can flow between the current collecting cavity 3221 and the heat exchange flow channels 301.

[0091] The box body 10 can refer to the external structure of the battery device 100, which provides physical protection for the components inside the battery device 100, such as the battery cell assembly 20, the heat exchange assembly 30, etc. The material of the box body 10 can include but is not limited to metal material or composite material, etc., wherein the metal material can include but is not limited to aluminum alloy or steel, etc., and the composite material can include but is not limited to carbon fiber reinforced composite material, glass fiber reinforced composite material, etc. The shape of the box body 10 can also include but is not limited to a cuboid, a square, or a cylinder, etc.

[0092] The battery cell assembly 20 can refer to an assembly comprising one or more battery cells 21. When the battery cell 21 is multiple, the multiple battery cells 21 can be but not limited to series, parallel, or series-parallel, etc. ​

[0093] The heat exchange assembly 30 can refer to a structure or component for regulating the temperature of the battery monomer assembly 20 to ensure the normal operation of the battery monomer assembly 20. The heat exchange assembly 30 can be one or more, and can be arranged on the surface of one or two battery monomers 21 at the outermost side of the battery monomer assembly 20, or between any two adjacent groups of battery monomers 21. For example, referring to Figure 3 The battery monomer assembly 20 can include a plurality of rows of battery monomers 21 arranged along the second direction Y, and each row of battery monomers 21 is arranged along the first direction X. The heat exchange assembly 30 is arranged between any two adjacent rows of battery monomers 21 and on the outer side of the two rows of battery monomers 21 at both ends of the second direction Y. The first direction X, the second direction Y, and the third direction Z mentioned below can refer to one of the length direction, the width direction, and the height direction of the heat exchange body 31. For example, the first direction X can refer to the length direction of the heat exchange body 31.

[0094] The heat exchange body 31 can refer to a pipe-shaped component or a hollow structural member that can flow through the heat exchange medium. The heat exchange flow channel 301 can refer to a flow channel formed inside the heat exchange body 31 for flowing through the heat exchange medium, and can extend through the heat exchange body 31 along the first direction X. The heat exchange body 31 can be flat, for example, the heat exchange body 31 can be a flat component, or a structure composed of a plurality of heat exchange pipes connected side by side. The material of the heat exchange body 31 can include but is not limited to metal materials, composite materials or ceramic materials, etc. The metal material can include but is not limited to aluminum alloy, copper alloy, etc. The composite material can include but is not limited to carbon fiber reinforced composite material or graphite-metal composite material, etc. The ceramic material can include but is not limited to aluminum nitride ceramic or beryllium oxide ceramic, etc. The heat exchange medium mentioned in the present application can include but is not limited to water, ethylene glycol solution or mineral oil, silicone oil, etc.

[0095] The current collecting structure 32 is arranged at both ends of the heat exchange body 31 along the first direction X. One of the current collecting structures 32 at both ends of the first direction X can be used to introduce the heat exchange medium and deliver the heat exchange medium into the heat exchange flow channel 301 of the heat exchange body 31, and the other can output the heat exchanged heat exchange medium from the heat exchange flow channel 301 to the external circulation pipeline.

[0096] The blocking member 321 can refer to a component that can block the heat exchange flow channel 301. The blocking member 321 at least includes two parts of the connecting part 3211 and the blocking part 3212.

[0097] For the convenience of understanding, the blocking part 3212 can refer to a plug or a block, which is partially or completely embedded into the heat exchange flow channel 301 to block the heat exchange flow channel 301. The number of the blocking part 3212 can be two, three, four, etc. A certain number of blocking parts 3212 can be selected as needed to block a corresponding number of heat exchange flow channels 301, so as to adjust the heat exchange capacity of the heat exchange assembly 30 to meet different use requirements. For example, if the number of heat exchange flow channels 301 blocked in the heat exchange main body 31 is more, the heat exchange medium flowing through is less, and the overall heat exchange capacity of the heat exchange assembly 30 is poorer. If the number of heat exchange flow channels 301 blocked in the heat exchange main body 31 is less, the heat exchange medium flowing through is more, and the overall heat exchange capacity of the heat exchange assembly 30 is higher. The material of the blocking part 3212 can include but is not limited to wood, rubber, plastic, etc.

[0098] The connecting part 3211 can refer to a connecting structure or part connecting at least two blocking parts 3212. By connecting the connecting part 3211 and the at least two blocking parts 3212, the connecting part 3211 and the at least two blocking parts 3212 can form an integral part, and the at least two blocking parts 3212 can be installed into the corresponding heat exchange flow channels 301 at the same time, which is beneficial to complete the assembly of the at least two blocking parts 3212 at one time, reduces the assembly times, and improves the assembly efficiency. After the at least two blocking parts 3212 are assembled into the heat exchange flow channels 301, the connecting part 3211 can also play a limiting role outside the heat exchange flow channels 301, which reduces the risk of displacement and deformation of the blocking part 3212 in the heat exchange flow channels 301, thereby improving the installation reliability of the blocking part 3212 in the heat exchange flow channels 301, improving the blocking reliability of the blocking part 3212 to the heat exchange flow channels 301, and also being beneficial to the smooth and stable formation of the adapter 323 on the heat exchange main body 31.

[0099] The current collecting part 322 can refer to the main structure of the current collecting structure 32, which is used to receive the heat exchange medium and flow the heat exchange medium together. For example, the current collecting part 322 can be a current collector, and the current collecting cavity 3221 can be a cavity structure formed on the current collecting part 322. Optionally, the current collecting cavity 3221 can be a cavity open to one side of the heat exchange main body 31, and the communication port 322a can be an inlet and outlet for the heat exchange medium to enter and exit the current collecting cavity 3221. The material of the current collecting part 322 can include but is not limited to metal, plastic, or composite materials, etc. The metal material can include but is not limited to aluminum alloy, copper alloy, etc. The plastic material can include but is not limited to polyethylene or polypropylene, etc. The composite material can include but is not limited to carbon fiber reinforced composite material or graphite-metal composite material, etc.

[0100] The adapter 323 can be a component for connecting the current collector 322 and the heat exchange main body 31. The adapter 323 can be an annular structure arranged around the first direction X, one end of the adapter 323 being wrapped on the heat exchange main body 31 and the other end being wrapped on the current collector 322. The material of the adapter 323 can include but is not limited to a metal material or a plastic material, etc. The metal material can include but is not limited to an aluminum alloy, a copper alloy, etc. The plastic material can include but is not limited to polyethylene or polypropylene, etc.

[0101] The adapter 323 can be formed on the heat exchange main body 31, which means that the adapter 323 can be formed on the surface of the heat exchange main body 31, so that the adapter 323 and the heat exchange main body 31 are tightly combined to form a whole. The forming method of the adapter 323 on the heat exchange main body 31 can include but is not limited to injection molding, 3D printing, casting, etc., which are not limited specifically here.

[0102] Since the heat exchange main body 31 and the current collector 322 are usually first manufactured as components, their sizes or shapes are fixed. If the heat exchange main body 31 and the current collector 322 are directly connected, it is more troublesome to match their sizes, shapes and surface flatness, and there is a risk of poor fitting, which can affect the connection quality. By forming the adapter 323 on the heat exchange main body 31, the adapter 323 can be manufactured according to the existing size and shape of the heat exchange main body 31, which is easier to manufacture. Through the forming mold of the adapter 323, the adapter 323 can better adapt to the existing size, shape and surface flatness of the current collector 322, thereby reducing the installation difficulty between the heat exchange main body 31 and the current collector 322. The heat exchange main body 31 connected to the current collector 322 through the adapter 323 can also easily ensure a high connection quality and improve the connection reliability of the heat exchange main body 31, the adapter 323 and the current collector 322.

[0103] The connection method of the adapter 323 and the current collector 322 can include but is not limited to welding, bolt connection or riveting, etc., which are not limited specifically here.

[0104] In the process of forming the adapter 323 on the heat exchange main body 31, the material (for example, injection liquid or pouring liquid) forming the adapter 323 can act on the blocking part 3212. Since the connecting part 3211 is located outside the heat exchange main body 31, the connecting part 3211 can limit the at least two blocking parts 3212, so that the blocking part 3212 can be stably located inside the heat exchange flow channel 301 and is not easy to displace or deform, which is beneficial to block the heat exchange flow channel 301 by the blocking part 3212 and can reduce the risk of displacement of the blocking part 3212 in the forming process of the adapter 323. If the blocking part 3212 is displaced, the material in the forming process of the adapter 323 can enter the space formed after the displacement of the blocking part 3212, so that there is not enough material to form the adapter 323, which affects the forming quality of the adapter 323. Therefore, the above scheme is beneficial to the smooth forming of the adapter 323 on the heat exchange main body 31, improves the forming quality of the adapter 323, and improves the connection strength and reliability of the adapter 323 and the heat exchange main body 31.

[0105] In the battery device 100 with the above structure, by arranging the heat exchange assembly 30 to include the heat exchange main body 31 and the current collecting structure 32, and arranging the current collecting structure 32 to include the blocking part 321, the current collecting part 322 and the adapter 323, when the heat exchange main body 31 is connected with the current collecting structure 32, the adapter 323 is formed on the heat exchange main body 31, and then the current collecting part 322 is connected, so that the current collecting part 322 is not directly connected with the heat exchange main body 31. The adapter 323 can easily adapt to the size and shape of the heat exchange main body 31 in the forming process, and can match the size and shape of the current collecting part 322 in advance. Therefore, the installation difficulty between the heat exchange main body 31, the current collecting part 322 and the adapter 323 can be reduced, the connection reliability can be improved, the risk of leakage can be reduced, and the reliability of the battery device 100 can be improved. By arranging the blocking part 321 to include the connecting part 3211 and the at least two blocking parts 3212, the at least two blocking parts 3212 are connected through the connecting part 3211, the connecting part 3211 can limit the blocking part 3212, reduce the risk of displacement or deformation of the blocking part 3212 in the forming process of the adapter 323, and improve the blocking and sealing effect of the blocking part 3212 on the heat exchange flow channel 301 at the position, so as to meet the heat exchange design requirement of the heat exchange assembly 30. It is also beneficial to improve the forming quality of the adapter 323, improve the connection strength and reliability of the adapter 323 and the heat exchange main body 31, improve the reliability of the heat exchange assembly 30, and improve the reliability of the battery device 100.

[0106] In some embodiments of the present application, referring to Figures 8 to 13 The blocking part 3212 has an outer side surface 3212a close to the current collecting part 322. In a reference plane parallel to the outer side surface 3212a, the area of the orthographic projection of the connecting part 3211 on the reference plane is smaller than the area of the outer side surface 3212a.

[0107] The reference surface can refer to any plane parallel to the outer side surface 3212a.

[0108] The area of the normal projection of the connecting portion 3211 on the reference surface is smaller than the area of the outer side surface 3212a. It can be understood that, in the second direction Y, the size of the connecting portion 3211 is smaller than the size of the outer side surface 3212a; or, in the third direction Z, the size of the part of the connecting portion 3211 corresponding to the outer side surface 3212a is smaller than the size of the outer side surface 3212a; or, in the second direction Y, the size of the connecting portion 3211 is smaller than the size of the outer side surface 3212a, and in the third direction Z, the size of the part of the connecting portion 3211 corresponding to the outer side surface 3212a is smaller than the size of the outer side surface 3212a. The second direction Y and the third direction Z can be referred to as Figures 8 to 13 .

[0109] In the above technical solution, the size of the part of the connecting portion 3211 corresponding to the plugging portion 3212 is smaller than the size of the plugging portion 3212, and in the process of forming the adapter 323 on the heat exchange main body 31, the material forming the adapter 323 has a larger bonding surface with the outer side surface 3212a, which can improve the bonding strength and connection reliability of the plugging portion 3212, the adapter 323 and the heat exchange main body 31, enhance the plugging and sealing effect of the plugging portion 3212 on the heat exchange runner 301, improve the reliability of the heat exchange assembly 30, and further improve the reliability of the battery device 100. The above structure can also reduce the amount of material and the weight of the plugging member 321 on the basis of the at least two plugging portions 3212 forming an integral part through the connecting portion 3211, which is conducive to improving the energy density of the battery device 100.

[0110] In some embodiments of the present application, referring to Figure 6 and Figure 8 , the size of the heat exchange main body 31 in the first direction X and the third direction Z is greater than the size in the second direction Y, the plurality of heat exchange runners 301 are arranged at intervals along the third direction Z, the size of the connecting portion 3211 in the second direction Y is smaller than the size of the plugging portion 3212, and the first direction X, the second direction Y and the third direction Z are perpendicular to each other.

[0111] The heat exchange main body 31 with the above structure can have a rectangular cross section perpendicular to the first direction X, and the cross section of the heat exchange main body 31 can be a strip shape (see Figure 6). Through the above structure, the heat exchange main body 31 can be a plate-shaped structural member with a relatively small thickness, a relatively small volume, and space saving. When the heat exchange assembly 30 exchanges heat with the battery monomer assembly 20, the end face of the heat exchange main body 31 in the second direction Y can be in close contact with the surface of the battery monomer 21 for heat exchange, providing a larger heat exchange surface, thereby saving space inside the box body 10, and a larger volume of the battery monomer assembly 20 can be arranged, or other electrical components can be conveniently arranged.

[0112] It can be understood that, in the second direction Y, the connecting part 3211 can be an end face aligned with the end of the blocking part 3212, or both end faces of the connecting part 3211 are not aligned with the end face of the blocking part 3212. Figure 8 In the second direction Y, both end faces of the connecting part 3211 are not aligned with the end face of the blocking part 3212.

[0113] Each blocking part 3212 has an area not blocked by the connecting part 3211, so that during the molding of the adapter 323 on the heat exchange main body 31, each blocking part 3212 has a larger bonding surface with the adapter 323, and the whole blocking part 321 has a larger bonding surface with the adapter 323, which can improve the connection strength and reliability. Secondly, more edge positions of each blocking part 3212 are exposed for cooperation with the heat exchange runner 301, and the adapter 323 can cover more edge positions of the blocking part 3212 during molding.

[0114] In the above technical solution, the heat exchange main body 31 can form a plate-shaped structure with a relatively small thickness, which is easier to adhere to the surface of the battery monomer assembly 20 for heat exchange, is beneficial to save space inside the box body 10, can provide a larger arrangement space for the battery monomer assembly 20, improve the energy density of the battery device 100, can also provide a larger arrangement space for other electrical components, facilitate the installation of internal components of the box body 10, reduce the installation difficulty, and is beneficial to maintenance and repair. Each blocking part 3212 has an area not blocked by the connecting part 3211, so that during the molding of the adapter 323 on the heat exchange main body 31, each blocking part 3212 has a larger bonding surface with the adapter 323, and the whole blocking part 321 has a larger bonding surface with the adapter 323, which can improve the connection strength and reliability. Moreover, more edge positions of each blocking part 3212 are exposed for cooperation with the heat exchange runner 301, and the adapter 323 can cover more edge positions of the blocking part 3212 during molding, enhancing the blocking and sealing effect of the blocking part 3212 on the heat exchange runner 301, thereby improving the reliability of the heat exchange assembly 30 and the reliability of the battery device 100.

[0115] In some embodiments of the present application, with reference to Figures 8 to 14 The connecting portion 3211 is provided with an avoiding groove 3211a near one side of the heat exchange main body 31, and the connecting portion 3211 is provided with the avoiding groove 3211a corresponding to the position of the flow channel wall 302 between any two adjacent heat exchange flow channels 301, and the avoiding groove 3211a abuts against the flow channel wall 302.

[0116] In the above technical solution, the avoiding groove 3211a can abut against the flow channel wall 302 to limit the position, which can reduce the risk of displacement of the blocking portion 3212 caused by the action on the connecting portion 3211 and the blocking portion 3212 during the forming process of the adapter 323, improve the installation reliability of the blocking portion 3212 in the heat exchange flow channel 301, and further enhance the blocking effect of the blocking portion 3212 on the heat exchange flow channel 301.

[0117] In some embodiments of the present application, with reference to Figures 8 to 13 The connecting portion 3211 and the blocking portion 3212 are detachably connected. The detachable connection manner of the connecting portion 3211 and the blocking portion 3212 can include but is not limited to clamping, screwing or inserting, etc.

[0118] It can be understood that, since the heat exchange main body 31 usually has a small thickness, compared with manufacturing the blocking member 321 by using an integral molding method, the connecting portion 3211 and the blocking portion 3212 can be manufactured separately, and after the connecting portion 3211 and the blocking portion 3212 are manufactured separately, the two are assembled, which can reduce the manufacturing difficulty of the blocking member 321, improve the product yield, and also can replace the damaged part when one of the connecting portion 3211 and the blocking portion 3212 is damaged, which can reduce the use cost.

[0119] In some embodiments of the present application, with reference to Figure 8 and Figure 9 One of the connecting portion 3211 and the blocking portion 3212 is provided with a clamping protrusion 3201, and the other is provided with a clamping groove 3202, and the clamping groove 3202 and the clamping protrusion 3201 are connected by clamping and matching.

[0120] The clamping protrusion 3201 can be a protrusion, a convex or a clamping hook, etc. The clamping groove 3202 can be a groove structure that can cooperate with the clamping protrusion 3201 to achieve the connecting effect. For example, with reference to Figure 8 and Figure 9 The clamping groove 3202 can be a bracket, and the bracket is formed with a clamping groove.

[0121] The connecting portion 3211 can be provided with the clamping protrusion 3201, and the blocking portion 3212 is provided with the clamping groove 3202, and the clamping groove 3202 and the clamping protrusion 3201 can be connected by clamping connection. Wherein, the clamping protrusion 3201 can be arranged on the opposite side of the connecting portion 3211 and close to the blocking portion 3212, and the clamping groove 3202 is arranged on the opposite side of the blocking portion 3212 and close to the connecting portion 3211. The clamping protrusion 3201 can also be arranged on one side, two sides, three sides or four sides of the connecting portion 3211, and the clamping groove 3202 is arranged on the corresponding position of the blocking portion 3212. For example, referring to Figure 8 and Figure 9 , the clamping protrusion 3201 is arranged on the two sides of the connecting portion 3211 in the second direction Y, and the clamping groove 3202 is arranged on the blocking portion 3212 in the second direction Y.

[0122] The connecting portion 3211 can be provided with the clamping protrusion 3201, and the blocking portion 3212 is provided with the clamping groove 3202, and the clamping groove 3202 and the clamping protrusion 3201 can be connected by clamping connection. Wherein, the clamping protrusion 3201 can be arranged on the opposite side of the connecting portion 3211 and close to the blocking portion 3212, and the clamping groove 3202 is arranged on the opposite side of the blocking portion 3212 and close to the connecting portion 3211. The clamping protrusion 3201 can also be arranged on one side, two sides, three sides or four sides of the connecting portion 3211, and the clamping groove 3202 is arranged on the corresponding position of the blocking portion 3212.

[0123] In the above technical solution, the connecting portion 3211 and the blocking portion 3212 can be connected by clamping connection of the clamping groove 3202 and the clamping protrusion 3201, and the connection is reliable, which can improve the connection reliability of the connecting portion 3211 and the blocking portion 3212.

[0124] In some embodiments of the present application, referring to Figure 8 and Figure 9 , the clamping protrusion 3201 or the clamping groove 3202 is arranged on the opposite ends of the connecting portion 3211.

[0125] The connecting portion 3211 can be provided with the clamping protrusion 3201, and in this example, the clamping protrusion 3201 can be arranged on the opposite ends of the connecting portion 3211. The connecting portion 3211 can also be provided with the clamping groove 3202, and in this example, the clamping groove 3202 can be arranged on the opposite ends of the connecting portion 3211. Wherein, the opposite ends of the connecting portion 3211 can refer to the two ends in the second direction Y, or the two ends in the third direction Z.

[0126] For example, referring to Figure 8 and Figure 9The clamping protrusion 3201 is arranged on the connecting portion 3211 at both ends in the second direction Y.

[0127] In the above technical solution, the opposite ends of the connecting portion 3211 can be connected to the blocking portion 3212 through the clamping groove 3202 and the clamping protrusion 3201, thereby playing a fixing role on the opposite sides of the connecting portion 3211 and the blocking portion 3212, bringing more stable and balanced fixing effect, and further improving the connection reliability of the connecting portion 3211 and the blocking portion 3212.

[0128] In some embodiments of the present application, referring to Figure 8 and Figure 9 , the clamping protrusion 3201 is arranged on the connecting portion 3211, and the clamping groove 3202 is arranged on the blocking portion 3212.

[0129] In the above technical solution, since the blocking portion 3212 is blocked in the heat exchange flow channel 301, considering that the adapter 323 needs to wrap the heat exchange main body 31, the size of the blocking portion 3212 is larger than that of the connecting portion 3211, so arranging the clamping groove 3202 on the blocking portion 3212 can facilitate the processing of the clamping groove 3202 and reduce the manufacturing difficulty.

[0130] In some embodiments of the present application, referring to Figure 9 , one of the connecting portion 3211 and the blocking portion 3212 is provided with a guide groove 3203, and the other is provided with a guide column 3204, and the guide column 3204 is arranged in the guide groove 3203.

[0131] The guide groove 3203 and the guide column 3204 can refer to structures that can cooperate to play a guiding function.

[0132] The connecting portion 3211 can be provided with the guide groove 3203, and the blocking portion 3212 is provided with the guide column 3204. The connecting portion 3211 can also be provided with the guide column 3204, and the blocking portion 3212 is provided with the guide groove 3203 (see Figure 9 ).

[0133] In the above technical solution, the connecting portion 3211 and the blocking portion 3212 can improve the positioning accuracy when connecting through the guiding effect of the guide groove 3203 and the guide column 3204, improve the clamping success rate of the clamping protrusion 3201 and the clamping groove 3202, and further improve the assembly efficiency.

[0134] In some embodiments of the present application, referring to Figure 9 , the guide column 3204 is arranged on the connecting portion 3211, and the guide groove 3203 is arranged on the blocking portion 3212.

[0135] In the technical scheme, the blocking part 3212 is blocked in the heat exchange channel 301, and the size of the blocking part 3212 is larger than that of the connecting part 3211, considering that the adapter 323 needs to wrap the heat exchange main body 31, so the guide groove 3203 arranged on the blocking part 3212 can facilitate the processing of the guide groove 3203 and reduce the manufacturing difficulty.

[0136] In some embodiments of the present application, referring to Figures 10 to 13 , any two adjacent blocking parts 3212 are detachably connected through the connecting part 3211.

[0137] It can be understood that the connecting part 3211 can be arranged between any two adjacent blocking parts 3212 and connected through the connecting part 3211. For example, referring to Figures 10 to 13 , the blocking part 3212 is three, the connecting part 3211 is two, and the two adjacent blocking parts 3212 are detachably connected through the connecting part 3211.

[0138] In the technical scheme, when the number of the blocking part 3212 is large, the plurality of blocking parts 3212 can be connected in sequence through the plurality of connecting parts 3211, the connection mode is more flexible, and each blocking part 3212 and the connecting part 3211 are easier to operate during assembly, which can reduce the assembly difficulty. When the heat exchange channel 301 corresponding to a certain blocking part 3212 fails, the two adjacent blocking parts 3212 connected through the connecting part 3211 can more accurately process the fault part, only the connecting part 3211 and the blocking part 3212 at the fault position need to be disassembled, without disassembling the connecting part 3211 and the blocking part 3212 at other positions, the operation range is small, which can reduce the maintenance difficulty and reduce the risk of interference to other normal working blocking parts 3212, and is also beneficial to save maintenance cost and material cost. When the heat exchange capacity of the heat exchange assembly 30 needs to be adjusted, such as adjusting the number of heat exchange channels 301 participating in heat exchange, the above scheme can more conveniently start or stop a single or part of the heat exchange channels 301, and can be flexibly adjusted by disassembling or assembling the connecting part 3211 according to the actual heat exchange demand, which has less restriction during adjustment and is beneficial to the flexible adjustment of the heat exchange channels 301 in the heat exchange main body 31.

[0139] In some embodiments of the present application, referring to Figure 10 and Figure 11 , the connecting part 3211 comprises a first part 3205 and a second part 3206, the first part 3205 and the second part 3206 are detachably connected, the first part 3205 is connected with one of the two adjacent blocking parts 3212, and the second part 3206 is connected with the other of the two adjacent blocking parts 3212.

[0140] In the technical scheme, the connecting part 3211 is arranged in a two-part structure and on the two adjacent blocking parts 3212, so that the two adjacent blocking parts 3212 are detachably connected through the first part 3205 and the second part 3206, the blocking part 3212 does not need to be provided with a structure for detachable cooperation, such as a clamping groove or a clamping protrusion, and the like, which can reduce the damage to the structure of the blocking part 3212, ensure the reliability of the structure of the blocking part 3212, and further enhance the blocking effect of the blocking part 3212 on the heat exchange channel 301, and can also simplify the structure of the blocking part 3212 and reduce the manufacturing cost.

[0141] In some embodiments of the present application, one of the two adjacent blocking parts 3212 is an integral molding with the first part 3205, and the other is an integral molding with the second part 3206.

[0142] The integral molding mode of the first part 3205 and the corresponding blocking part 3212, and the second part 3206 and the corresponding blocking part 3212 can be, but is not limited to, injection molding, die casting or 3D printing, and the like.

[0143] In the technical scheme, the first part 3205 and the corresponding blocking part 3212 are integrally molded, which can reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly 30, and also make the first part 3205 and the corresponding blocking part 3212 form an integral piece, improve the overall structural strength, and improve the reliability of the blocking piece 321. The second part 3206 and the corresponding blocking part 3212 are integrally molded, which can also reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly 30, and also make the second part 3206 and the corresponding blocking part 3212 form an integral piece, improve the overall structural strength, and improve the reliability of the blocking piece 321.

[0144] In some embodiments of the present application, referring to Figure 10 and Figure 11 , the first part 3205 is provided with a first plug-in part 32051 extending out of the blocking part 3212, the second part 3206 is provided with a first plug-in groove 3206a, the first plug-in part 32051 and the first plug-in groove 3206a are plug-in matched, and the first plug-in part 32051 and the first plug-in groove 3206a extend in the spacing direction of the at least two blocking parts 3212.

[0145] In the technical scheme, the first part 3205 can be plug-in matched with the first plug-in groove 3206a of the second part 3206 through the first plug-in part 32051, so that the two adjacent blocking parts 3212 are detachably connected, and the detachable mode is simple to operate and convenient to manufacture, which can improve the disassembly and assembly efficiency and reduce the cost.

[0146] In some embodiments of the present application, referring to Figure 12 and Figure 13 , the connecting part 3211 is connected with one of the two adjacent blocking parts 3212, and comprises an extension part 3207 and a second insertion part 3208, the extension part 3207 is connected with the blocking part 3212 and extends to the other of the two adjacent blocking parts 3212, the second insertion part 3208 is arranged on the extension part 3207, and the other of the two adjacent blocking parts 3212 is provided with a second insertion slot 3212b, the second insertion slot 3212b and the second insertion part 3208 are in insertion fit.

[0147] The extension part 3207 can refer to a strip-shaped part. The second insertion part 3208 can refer to a part that can play an insertion role, for example, the second insertion part 3208 can be an insertion block.

[0148] The second insertion slot 3212b can refer to a slot structure that can cooperate with the second insertion part 3208. The shape of the second insertion slot 3212b can match the shape of the second insertion part 3208, which can be but is not limited to L-shaped or T-shaped, and the like. Exemplarily, referring to Figure 13 , the shapes of the second insertion part 3208 and the second insertion slot 3212b are T-shaped.

[0149] In the above technical solution, the two adjacent blocking parts 3212 can be connected together through the insertion fit of the second insertion part 3208 and the second insertion slot 3212b, and the detachable operation is simple, and since the second insertion slot 3212b is arranged on the blocking part 3212, the combination of the connecting part 3211 and the blocking part 3212 is relatively firm, and the connection is more reliable.

[0150] In some embodiments of the present application, referring to Figure 13 , the second insertion part 3208 is arranged at one end of the extension part 3207 away from the current collector 322.

[0151] In the above technical solution, the second insertion part 3208 is arranged on the end of the extension part 3207, so that the overall structure of the connecting part 3211 is more compact, the size of the connecting part 3211 can be reduced, and the weight is reduced, which is beneficial to improve the energy density of the battery device 100.

[0152] In some embodiments of the present application, the connecting part 3211 and the corresponding blocking part 3212 are integrally formed.

[0153] In the above solution, the integrally formed manner of the connecting part 3211 and the corresponding blocking part 3212 can be but is not limited to injection molding, die casting or 3D printing, and the like.

[0154] In the technical solution, the connecting part 3211 and the corresponding sealing part 3212 are integrally formed, which can reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly 30, and form an integrated part, improve the overall structural strength, and improve the reliability of the sealing part 321.

[0155] In some embodiments of the present application, the connecting part 3211 and the at least two sealing parts 321 are integrally formed.

[0156] It can be understood that the connecting part 3211 connects all the sealing parts 321 and forms an integrated part with all the sealing parts 321. The integrally formed manner of the connecting part 3211 and the at least two sealing parts 321 can be, but is not limited to, injection molding, die casting or 3D printing, etc.

[0157] In the technical solution, the above structure can reduce the number of parts, reduce the assembly steps, improve the assembly efficiency of the heat exchange assembly 30, and form an integrated part of the connecting part 3211 and the at least two sealing parts 3212, improve the overall structural strength, and improve the reliability of the sealing part 321.

[0158] In some embodiments of the present application, the adapter 323 is integrally injection molded on the heat exchange body 31.

[0159] It can be understood that the adapter 323 can be manufactured on the heat exchange body 31 by injection molding, and the injection molding referred to herein can be, but is not limited to, overmolding, etc. For example, a core rod can be inserted in advance in the heat exchange flow channel 301 of the heat exchange body 31 that does not need to be sealed, and a mold required for injection molding of the adapter 323 is arranged at both ends of the first direction X of the heat exchange body 31. By injecting injection liquid into the mold and cooling, the adapter 323 can be obtained, and the connection between the adapter 323 and the heat exchange body 31 is more tight and firm, and is not easy to separate.

[0160] The adapter 323 can be made of plastic material, and the current collector 322 can also be made of plastic material. After the adapter 323 is formed, it can be fixed with the current collector 322 by welding the plastic material hot melt.

[0161] The adapter 323 can also be partially made of plastic material and partially made of metal material, and the current collector 322 is made of metal material. For example, the metal material part of the adapter 323 can be placed in the mold in advance, and the plastic material part of the adapter 323 can be injection molded to obtain. After the adapter 323 is formed, the metal material part can be connected to the current collector 322 by welding.

[0162] In the technical solution, the adapter 323 is formed by injection molding on the heat exchange main body 31. The adapter 323 has a relatively fast forming speed, is easy to mass produce automatically, and can improve the production efficiency. In addition, the adapter 323 has a high dimensional accuracy and a high surface quality, which can improve the forming quality of the adapter 323, the connection reliability between the heat exchange main body 31, the adapter 323 and the current collecting member 322, and the reliability of the battery device 100.

[0163] In some embodiments of the present application, with reference to Figures 8 to 13 The sealing part 3212 is in abutting fit with the inner wall of the heat exchange flow channel 301 around the circumferential surface 3212c in the first direction X.

[0164] It can be understood that the circumferential surface 3212c of the sealing part 3212 and the inner wall of the heat exchange flow channel 301 can be in transition fit or interference fit. The above-mentioned scheme can reduce the risk of a gap between the circumferential surface 3212c and the inner wall of the heat exchange flow channel 301, reduce the probability that the material enters the gap during the forming of the adapter 323 to cause the adapter 323 to be unable to be formed, improve the forming quality of the adapter 323, and improve the connection reliability of the heat exchange main body 31, the adapter 323 and the current collecting member 322. In addition, the above-mentioned scheme can also enable the sealing part 3212 to support in the heat exchange flow channel 301, reduce the probability of large deformation of the heat exchange main body 31, and improve the working reliability of the heat exchange assembly 30.

[0165] In some embodiments of the present application, with reference to Figure 15 The part of the adapter 323 close to the current collecting member 322 is configured as a weldable part 3231, and the weldable part 3231 is connected to the current collecting member 322 by welding.

[0166] The weldable part 3231 can refer to the part of the adapter 323 connected to the current collecting member 322 by welding.

[0167] For example, the adapter 323 can be made of plastic and formed by injection molding on the heat exchange main body 31. The part of the adapter 323 close to the current collecting member 322 forms the weldable part 3231. The current collecting member 322 can also be made of plastic, and the weldable part 3231 can be connected to the current collecting member 322 by welding.

[0168] For example, the adapter 323 can also be made of metal and formed by casting on the heat exchange main body 31. The part of the adapter 323 close to the current collecting member 322 forms the weldable part 3231, and the weldable part 3231 is connected to the current collecting member 322 by welding.

[0169] In the technical solution, the adapter 323 is connected to the current collector 322 by the weldable part 3231, so that the connection strength between the adapter 323 and the current collector 322 is improved, the connection reliability is improved, and the reliability of the heat exchange assembly 30 is improved.

[0170] In some embodiments of the present application, with reference to Figure 15 and Figure 16 , the weldable part 3231 is an annular structure arranged around the circumference of the adapter 323, the current collector 322 is provided with a sink 322b at one end close to the adapter 323, the sink 322b is an annular structure arranged around the circumference of the current collecting cavity 3221, and the weldable part 3231 is arranged in the sink 322b.

[0171] The sink 322b can refer to a groove structure arranged on the current collector 322. The shape of the sink 322b can match the shape of the weldable part 3231.

[0172] In the technical solution, the weldable part 3231 can be embedded in the sink 322b of the current collector 322, so that the adapter 323 can be positioned and installed on the current collector 322 in advance, so that the adapter 323 and the current collector 322 have a relatively accurate relative position before being connected, facilitating subsequent welding, bonding or other connection of the adapter 323 and the current collector 322, and also increasing the pretightening force of the adapter 323 and the current collector 322 before being connected, and improving the structural strength of the adapter 323 and the current collector 322 after being connected, so that the connection stability is enhanced, and the reliability of the heat exchange assembly 30 is improved, so that the heat exchange of the battery monomer assembly 20 is more reliable, and the reliability of the battery device 100 is improved.

[0173] In some embodiments of the present application, with reference to Figure 6 and Figure 17 , the heat exchange body 31 includes a shell 311 and a partition plate 312, both ends of the shell 311 in the first direction X are open, the size of the shell 311 in the second direction Y is smaller than the size of the shell 311 in the third direction Z, the third direction Z, the second direction Y and the first direction X are perpendicular to each other, the partition plate 312 is a plurality of partition plates, the plurality of partition plates 312 are arranged in the shell 311, the partition plate 312 is arranged inclined to the second direction Y, and the heat exchange flow channel 301 is formed between the partition plate 312 and the shell wall of the shell 311 and between any two adjacent partition plates 312.

[0174] The partition plate 312 can be a thin plate inside the shell 311 that plays a partitioning role. Optionally, in the first direction X, the size of the partition plate 312 can be equal to the size of the shell 311, and both ends of the partition plate 312 in the second direction Y can be connected to the inner wall of the heat exchange flow channel 301.

[0175] The size of the shell 311 in the second direction Y is smaller than the size of the shell 311 in the third direction Z, so that the shell 311 in the cross section perpendicular to the first direction X is a rectangle, which can be optionally configured as an elongated rectangle. In this way, the shell 311 can be configured as a shell structure with a small thickness, thereby saving space.

[0176] The partition plate 312 is arranged obliquely relative to the second direction Y. It can be understood that the partition plate 312 not only divides the internal space of the shell 311 to form the heat exchange flow channel 301, but also functions as an inclined rib to improve the overall structural strength and rigidity of the heat exchange main body 31.

[0177] The heat exchange main body 31 formed by the shell 311 and the plurality of partition plates 312 can be configured as a "harmonica tube" structure, which is simple in structure and easy to manufacture. The shell 311 and the plurality of partition plates 312 can be integrally formed or separately arranged, which is not specifically limited here.

[0178] In the above technical solution, by arranging the heat exchange main body 31 to include the shell 311 and the partition plate 312, the heat exchange main body 31 as a whole can be configured as a shell structure with a small thickness, thereby having a high heat exchange effect while having a small volume, and saving space inside the box body 10. The partition plate 312 can also form an inclined rib inside the shell 311, thereby improving the overall strength of the heat exchange main body 31, reducing the risk of large deformation of the shell 311, improving the reliability of the heat exchange main body 31, and further improving the reliability of the battery device 100.

[0179] In some embodiments of the present application, the shell 311 and the partition plate 312 are integrally formed. In this technical solution, the shell 311 and the partition plate 312 are integrally formed, which can reduce the number of parts and the assembly steps, thereby improving the production efficiency. The above solution can also improve the overall strength and rigidity of the heat exchange main body 31, reduce the risk of large deformation or damage of the heat exchange main body 31, improve the use reliability of the heat exchange main body 31, and further improve the reliability of the heat exchange assembly 30, thereby improving the reliability of the battery device 100.

[0180] In some embodiments of the present application, referring to Figure 17 , the shell wall at both ends of the shell 311 in the third direction Z is configured as an arc-shaped wall 311a. In this technical solution, the arc-shaped wall 311a can reduce the stress concentration problem at both ends of the shell 311 in the third direction Z, thereby improving the reliability of the shell 311.

[0181] In some embodiments of the present application, the cross-sectional shape of the heat exchange flow channel 301 is the same as the cross-sectional shape of the plugging piece 321 in the cross-sectional plane perpendicular to the first direction X.

[0182] In the above technical solution, the cross-sectional shape of the heat exchange flow channel 301 and the plugging piece 321 is the same, which can make the inner wall of the plugging piece 321 and the heat exchange flow channel 301 well fit, is conducive to the sealing of the plugging piece 321 in the heat exchange flow channel 301, can reduce the risk of gaps, and can also make the plugging piece 321 uniformly bear pressure in all directions in the heat exchange flow channel 301, which is also conducive to maintaining the sealing state between the plugging piece 321 and the inner wall of the heat exchange flow channel 301. Because the cross-sectional shape of the heat exchange flow channel 301 and the plugging piece 321 is the same, the plugging piece 321 can also play a supporting role inside the heat exchange flow channel 301, reducing the risk of large deformation of the heat exchange main body 31 due to stress, which is conducive to reducing the risk of reducing the flow cross section of the heat exchange flow channel 301, and can improve the heat exchange reliability of the heat exchange main body 31.

[0183] In some embodiments of the present application, the heat exchange main body 31 is a metal material piece or a non-metal material piece; and / or the current collecting piece 322 is a metal material piece or a non-metal material piece.

[0184] It can be understood that the heat exchange main body 31 can be a metal material piece or a non-metal material piece; the current collecting piece 322 can be a metal material piece or a non-metal material piece. The metal material piece can include but is not limited to copper, copper alloy, aluminum alloy, etc., and the non-metal material can include but is not limited to plastic, ceramic, etc. Among them, the heat exchange main body 31 and the current collecting piece 322 can be the same material or different materials.

[0185] Especially when the heat exchange main body 31 and the current collecting piece 322 are of different materials, for example, the heat exchange main body 31 is of metal material and the current collecting piece 322 is of non-metal material; or the heat exchange main body 31 is of non-metal material and the current collecting piece 322 is of metal material, the adapter 323 is overmolded on the heat exchange main body 31 and the current collecting piece 322, which is conducive to the connection between the heat exchange main body 31 and the current collecting piece 322 of different materials, can reduce the installation difficulty of the heat exchange main body 31 and the current collecting piece 322, and can improve the connection reliability between the heat exchange main body 31 and the current collecting piece 322.

[0186] In the technical solution, the heat exchange main body 31 of metal material can have better heat conductivity, which is conducive to improving the heat exchange efficiency. The heat exchange main body 31 can also be a non-metal material piece, which can reduce the cost while meeting the heat conductivity. The current collecting piece 322 of metal material can have high rigidity and strength, reducing the risk of damage. The current collecting piece 322 of non-metal material can reduce the cost while meeting the rigidity and strength. By setting the heat exchange main body 31 and the current collecting piece 322 to the above materials, more choices can be provided, and higher flexibility can be achieved.

[0187] The embodiment of the present application provides a kind of electric device 1000, including the battery device 100 as any of the foregoing embodiments, and the battery device 100 is used to store or provide electric energy.

[0188] In the above technical solution, since the battery device 100 has high reliability, the use of the battery device 100 to store or provide electric energy can improve the reliability of electricity consumption, thereby improving the use reliability of the electric device 1000.

[0189] Embodiment one

[0190] Reference Figures 3 to 9 According to the battery device 100 provided by the embodiment of the present application, the battery device 100 comprises a box body 10, a battery monomer assembly 20 and a heat exchange assembly 30.

[0191] The battery monomer assembly 20 is accommodated in the box body 10 and comprises a plurality of rows of battery monomers 21, and each row of battery monomers 21 is arranged in a plurality of groups. The heat exchange assembly 30 is accommodated in the box body 10 and exchanges heat with the battery monomer assembly 20.

[0192] The heat exchange assembly 30 is accommodated in the box body 10 and exchanges heat with the battery monomer assembly 20, and the heat exchange assembly 30 comprises a heat exchange main body 31 and a current collection structure 32.

[0193] The heat exchange main body 31 is a harmonica tube cold plate, the size of the harmonica tube cold plate in the first direction X is greater than the size of the harmonica tube cold plate in the third direction Z, and the size of the harmonica tube cold plate in the third direction Z is greater than the size of the harmonica tube cold plate in the second direction Y. The first direction X is the length direction of the heat exchange main body 31. The heat exchange main body 31 comprises a plurality of heat exchange flow channels 301 extending along the first direction X.

[0194] The current collection structure 32 is arranged at both ends of the heat exchange main body 31 in the first direction X, and the current collection structure 32 comprises a blocking piece 321, an adapter 323 and a current collection piece 322.

[0195] The blocking piece 321 comprises a connecting part 3211 and three blocking parts 3212, the three blocking parts 3212 are connected by one connecting part 3211, and the three blocking parts 3212 can block in the three heat exchange flow channels 301. The connecting part 3211 is provided with a clamping convex part 3201 at both ends in the second direction Y, and the blocking part 3212 is provided with two clamping groove parts 3202 spaced apart in the second direction Y, the clamping groove part 3202 is configured as a bracket, and the bracket is formed with a clamping groove, and the clamping groove part 3202 can be connected with the clamping convex part 3201. The connecting part 3211 is further provided with a guide column 3204, and the blocking part 3212 is provided with a guide groove 3203, and the guide groove 3203 can be connected with the guide column 3204.

[0196] The adapter 323 is injection molded on the heat exchange main body 31 and partially wrapped on the outer circumferential surface of the heat exchange main body 31. The inner part of the current collecting piece 322 is formed with a current collecting cavity 3221. The current collecting piece 322 is sealingly connected with the heat exchange main body 31 through the adapter 323, so that the current collecting cavity 3221 and the heat exchange flow channel 301 are connected in communication. The current collecting piece 322 is provided with a communication port 322a which communicates with the current collecting cavity 3221. The communication port 322a can be used for the heat exchange medium to flow in and out, so that the heat exchange medium can flow between the current collecting cavity 3221 and the heat exchange flow channel 301.

[0197] Embodiment two

[0198] With reference to Figures 3 to 7 , Figure 10 and Figure 11 , the battery device 100 provided by the embodiment of the application, the structure of the battery device 100 of embodiment two is basically the same as that of the battery device 100 of embodiment one, except that:

[0199] The three blocking parts 3212 are connected by the connecting part 3211 between two adjacent blocking parts 3212. The connecting part 3211 includes a first part 3205 and a second part 3206. The first part 3205 is arranged at the two ends of the three blocking parts 3212, and the second part 3206 is arranged at the middle position of the three blocking parts 3212. The first part 3205 is provided with a first plug-in part 32051 extending out of the blocking part 3212, and the second part 3206 is provided with a first plug-in groove 3206a. The first plug-in groove 3206a and the first plug-in part 32051 are plug-in matched.

[0200] Embodiment three

[0201] With reference to Figures 3 to 7 , Figure 12 and Figure 13 , the battery device 100 provided by the embodiment of the application, the structure of the battery device 100 of embodiment three is basically the same as that of the battery device 100 of embodiment two, except that:

[0202] The three blocking parts 3212 are connected by the connecting part 3211 between two adjacent blocking parts 3212. The connecting part 3211 is arranged at the two ends of the three blocking parts 3212. The connecting part 3211 includes an extension part 3207 and a second plug-in part 3208. The extension part 3207 connects the blocking part 3212 and extends to the blocking part 3212 at the middle position. The blocking part 3212 at the middle position is provided with a second plug-in groove 3212b. The second plug-in groove 3212b and the second plug-in part 3208 are plug-in matched.

[0203] It should be noted that the embodiments and features of the embodiments in the present application can be combined with each other without conflict. The above is only the preferred embodiment of the present application and is not used to limit the present application. For those skilled in the art, all the embodiments and optional embodiments of the present application can be combined to form new technical solutions without special instructions. If there is no special instruction, all the technical features and optional technical features of the present application can be combined to form new technical solutions. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized by, The application relates to a battery pack, comprising: a box body; a battery cell assembly accommodated in the box body; a heat exchange assembly accommodated in the box body and in heat exchange with the battery cell assembly, the heat exchange assembly comprising: a heat exchange main body comprising a plurality of heat exchange flow channels extending along a first direction; a flow collecting structure arranged at both ends of the heat exchange main body along the first direction, the flow collecting structure comprising a blocking member, an adapter and a flow collecting member, the blocking member comprising a connecting portion and at least two blocking portions, the at least two blocking portions being connected by the connecting portion and being capable of being blocked in the at least two heat exchange flow channels, the adapter being formed on the heat exchange main body, the flow collecting member having a flow collecting cavity formed therein, the flow collecting member being in sealed connection with the heat exchange main body through the adapter and being connected to the heat exchange main body so that the flow collecting cavity and the heat exchange flow channels are in communication, the flow collecting member being provided with a communication port communicating with the flow collecting cavity, the communication port being used for feeding and discharging heat exchange medium so that the heat exchange medium can flow between the flow collecting cavity and the heat exchange flow channels.

2. The battery device according to claim 1, characterized by The blocking portion has an outer side surface close to the flow collecting member, and the connecting portion has an area of a normal projection on a reference surface parallel to the outer side surface smaller than that of the outer side surface.

3. The battery device of claim 2, wherein The heat exchange main body has a size in the first direction and a third direction greater than a size in a second direction, the plurality of heat exchange flow channels are arranged at intervals along the third direction, the size of the connecting portion is smaller than that of the blocking portion in the second direction, and the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device of claim 1, wherein The connecting portion and the blocking portion are detachably connected.

5. The battery device of claim 4, wherein, One of the connecting portion and the blocking portion is provided with a clamping convex portion, and the other is provided with a clamping groove portion, the clamping groove portion and the clamping convex portion are in clamping connection.

6. The battery device of claim 5, wherein The clamping convex portion or the clamping groove portion is arranged at opposite ends of the connecting portion.

7. The battery device according to claim 5 or 6, characterized by The clamping convex portion is arranged on the connecting portion, and the clamping groove portion is arranged on the blocking portion.

8. The battery device of claim 5, wherein, One of the connecting portion and the blocking portion is provided with a guide groove, and the other is provided with a guide column, the guide column being arranged in the guide groove.

9. The battery device of claim 8, wherein, The guide column is arranged on the connecting portion, and the guide groove is arranged on the blocking portion.

10. The battery device of claim 1, wherein Any two adjacent blocking portions are detachably connected through the connecting portion.

11. The battery device of claim 10, wherein, The connecting portion comprises a first portion and a second portion, the first portion and the second portion are detachably connected, the first portion is connected with one of the two adjacent blocking portions, and the second portion is connected with the other of the two adjacent blocking portions.

12. The battery device of claim 11, wherein, One of the two adjacent blocking portions is an integral part with the first portion, and the other is an integral part with the second portion.

13. The battery device according to claim 11 or 12, characterized by, The first portion is provided with a first plug-in portion extending out of the blocking portion, the second portion is provided with a first plug-in groove, the first plug-in groove and the first plug-in portion are in plug-in connection, and the first plug-in portion and the first plug-in groove extend along a spacing direction of the at least two blocking portions.

14. The battery device of claim 10, wherein, The connecting part is connected with one of the two adjacent blocking parts, and comprises an extension part and a second inserting part, the extension part connects the blocking part and extends to the other of the two adjacent blocking parts, and the second inserting part is arranged on the extension part, the other of the two adjacent blocking parts is provided with a second inserting groove, and the second inserting groove and the second inserting part are in inserting fit.

15. The battery device of claim 14, wherein, The second inserting part is arranged at one end of the extension part away from the current collecting member.

16. The battery device of claim 14, wherein, The connecting part and the corresponding blocking part are integrally formed.

17. The battery device of any one of claims 1 to 3, wherein, The connecting part and the at least two blocking parts are integrally formed.

18. The battery device of any one of claims 1 to 3, wherein, The adapter is integrally injection molded on the heat exchange main body.

19. The battery device of any one of claims 1 to 3, wherein, The heat exchange main body is a metal material piece or a non-metal material piece; and / or the current collecting member is a metal material piece or a non-metal material piece.

20. An electrical device, comprising: The battery device as claimed in any one of claims 1 to 19 is used for storing or providing electric energy.

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