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 monomer and a heat exchange assembly, the box body has an interface; the battery monomers are arranged in the box body; the heat exchange assembly is configured to exchange heat with the battery monomers; the heat exchange assembly comprises a plurality of heat exchange bodies, connecting pieces and connectors. The plurality of heat exchange main bodies are in contact with the battery monomers; the connecting pieces are connected with the multiple heat exchange bodies. The joint connects the interface and the heat exchange main body or connects the interface and the connecting piece; the connector is located on one side of the box body. The connector is connected with the interface and the heat exchange main body or the connector and the connecting piece, and the connector is positioned on one side of the box body, so that the interface and the connector of the heat exchange assembly are integrated in the same area, the overall space occupation of the heat exchange assembly and the interface is reduced, and the space utilization rate in the battery device is improved; and the interior of the battery device can accommodate a battery monomer with a larger volume, so that a higher energy density is realized under the condition of the same volume.

Description

TECHNICAL FIELD

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

[0002] In the design and application of the battery device, the temperature control of the battery monomer is crucial to ensure the battery performance, prolong the battery monomer life and guarantee the use safety. In the related art, the battery monomer is temperature-regulated by using the heat exchange assembly, so that the battery monomer works in a suitable temperature range.

[0003] However, the design and layout of the heat exchange assembly are often not compact enough, resulting in that the heat exchange assembly occupies a large space in the battery device, which makes the space utilization in the battery device low, thereby making the energy density of the battery device low under the same volume. CONTENT OF THE UTILITY MODEL

[0004] In view of the above problems, the embodiments of the present application provide a battery device and a power utilization device, which can solve the problem that the space utilization in the battery device is low, thereby making the energy density of the battery device low under the same volume.

[0005] In a first aspect, the embodiments of the present application provide a battery device, which comprises a box body, a battery monomer and a heat exchange assembly. The box body has an interface; the battery monomer is arranged in the box body; the heat exchange assembly is configured to exchange heat with the battery monomer; wherein the heat exchange assembly comprises a plurality of heat exchange main bodies, a connecting piece and a joint. The plurality of heat exchange main bodies are in contact with the battery monomer; the connecting piece connects the plurality of heat exchange main bodies; the joint connects the interface and the heat exchange main body, or connects the interface and the connecting piece; wherein the joint is located at one side of the box body.

[0006] In the battery device of the embodiments of the present application, since the joint connects the interface and the heat exchange main body or connects the interface and the connecting piece, and the joint is located at one side of the box body, the interface and the joint of the heat exchange assembly are integrated in the same area, which reduces the overall space occupation of the heat exchange assembly and the interface, improves the space utilization in the battery device, and enables the battery device to accommodate a larger volume of battery monomer, thereby realizing a higher energy density under the same volume.

[0007] In some embodiments, the number of the joints is a plurality, and the plurality of joints are located at the same side of the box body.

[0008] In this way, since the plurality of joints are located at the same side of the box body, the space occupied by the plurality of joints in the box body is small, which can improve the space utilization in the battery device, enable the battery device to accommodate a larger volume of battery monomer, and thereby realize a higher energy density under the same volume.

[0009] In some embodiments, the connector is located on one side of the length direction of the box.

[0010] In actual use, one side of the length direction of the box is close to other equipment outside the battery device. Therefore, the connector is arranged on one side of the length direction of the box, which facilitates the connection of the connector and other equipment outside the battery device.

[0011] In some embodiments, the heat exchange body comprises a heat exchange element and a current collector, the heat exchange element has a medium flow channel inside, the heat exchange element is arranged between adjacent battery monomers, the current collector is connected to at least one end of the heat exchange element, the current collector communicates with the medium flow channel, and the two side walls of the current collector opposite to each other are connected with the connecting piece, and two adjacent current collectors are connected through the connecting piece.

[0012] In this way, since the two adjacent current collectors are connected through the connecting piece, it is not necessary to arrange a corresponding liquid inlet device, such as a connector, for each current collector, which improves the space utilization in the battery device, so that the battery device can accommodate larger volume battery monomers, thereby realizing higher energy density under the condition of the same volume.

[0013] In addition, the heat exchange element arranged between adjacent battery monomers can simultaneously exchange heat with two battery monomers, which reduces the space occupation of the heat exchange element, thereby improving the space utilization in the battery device, so that the battery device can accommodate larger volume battery monomers, thereby realizing higher energy density under the condition of the same volume.

[0014] In some embodiments, the connector comprises a first connecting part, a second connecting part and a third connecting part, one end of the first connecting part is connected to the interface, and the second connecting part and the third connecting part are connected with two connecting pieces connecting two adjacent current collectors.

[0015] In this way, by arranging the connector, the heat exchange medium can flow between the first connecting part and the interface, and can flow between the second connecting part or the third connecting part and the connecting piece. The connector arranged in this way has low flow resistance when the heat exchange medium flows, and can avoid backflow of the heat exchange medium, thereby improving the heat exchange efficiency.

[0016] In some embodiments, the joint comprises a first connecting portion, a second connecting portion and a third connecting portion, one end of the first connecting portion is connected to one end of the current collector away from the heat exchange member, the other end of the first connecting portion is connected to the interface, one end of the second connecting portion is connected to one of the two side walls opposite to the current collector, the other end of the second connecting portion is connected to the connecting member on one side of the current collector, one end of the third connecting portion is connected to the other of the two side walls opposite to the current collector, the other end of the third connecting portion is connected to the connecting member on the other side of the current collector.

[0017] In this way, by connecting each part of the joint to different parts of the current collector and connecting the connecting members, the split joint design can reduce the space occupation of the joint, thereby improving the space utilization in the battery device, so that the battery device can accommodate larger volume of battery monomers, thereby achieving higher energy density under the condition of the same volume.

[0018] In some embodiments, the number of joints is two, one of which is a water inlet joint and the other is a water outlet joint, and the water inlet joint and the water outlet joint are arranged on the same current collector.

[0019] In this way, arranging the water inlet joint and the water outlet joint on the same current collector can reduce the overall space occupation of the water inlet joint and the water outlet joint, thereby improving the space utilization in the battery device and enabling the battery device to accommodate larger volume of battery monomers, thereby achieving higher energy density under the condition of the same volume.

[0020] In some embodiments, the water inlet joint and the water outlet joint are arranged in a first direction.

[0021] In this way, by arranging the water inlet joint and the water outlet joint in the first direction, the space occupation of the water inlet joint and the water outlet joint in other directions is reduced, thereby reducing the overall space occupation of the water inlet joint and the water outlet joint.

[0022] In some embodiments, along the first direction, the central axis of the water inlet joint and the central axis of the water outlet joint overlap each other.

[0023] In this way, in the first direction, the projections of the water inlet joint and the water outlet joint overlap, so that the overall space occupation of the water inlet joint and the water outlet joint can be further reduced.

[0024] In some embodiments, the first connecting part of the water inlet connector comprises a first segment and a second segment, the first segment is connected with the second segment at an angle, the first segment is connected with the current collector; the first connecting part of the water outlet connector comprises a third segment and a fourth segment, the third segment and the fourth segment are connected at an angle, the third segment is in communication with the current collector; wherein the first segment and the second segment are parallel to each other, and the third segment and the fourth segment are parallel to each other.

[0025] In this way, due to the parallelism of the first and second segments and the third and fourth segments of the connector, this layout helps to make more efficient use of space, thereby improving the space utilization of the battery device.

[0026] In some embodiments, the number of connectors is two, one of which is a water inlet connector, and the other is a water outlet connector, the water inlet connector and the water outlet connector are arranged on two adjacent current collectors respectively.

[0027] In this way, arranging the water inlet connector and the water outlet connector on two adjacent heat exchange assemblies can reduce the overall space occupation of the water inlet connector and the water outlet connector. Moreover, arranging the connectors on different heat exchange assemblies can facilitate the layout of the water inlet connector and the water outlet connector, thereby facilitating the manufacture of the water inlet connector and the water outlet connector and reducing manufacturing complexity.

[0028] In some embodiments, the current collector comprises a first side and a second side connected with the first side, the surface area of the second side is greater than that of the first side, the connecting piece is connected with the second side, and the water inlet connector and the water outlet connector are both connected with the first side.

[0029] In this way, the connecting piece is connected with the second side with a larger surface area, which facilitates the passage of a larger flow of heat exchange medium into the medium flow channel of the heat exchange piece, thereby improving the heat exchange efficiency of the heat exchange piece. The water inlet connector and the water outlet connector are both connected with the first side with a smaller surface area, which reduces the space occupation of the water inlet connector and the water outlet connector on the heat exchange piece, thereby improving the space utilization of the battery device.

[0030] In some embodiments, the connecting piece comprises a first connecting pipe and a second connecting pipe, the first connecting pipe and the second connecting pipe are arranged on the same side of the battery monomer, the first connecting pipe and the second connecting pipe are both in communication with the medium flow channel, the first connecting pipe is in communication with the water inlet connector, the second connecting pipe is in communication with the water outlet connector, and the first connecting pipe and the second connecting pipe are arranged at intervals along a first direction.

[0031] Thus, since the first connecting pipe and the second connecting pipe are arranged on the same side of the battery monomer and the first connecting pipe and the second connecting pipe are arranged in the first direction, the space occupied by the connecting piece in the battery device is small, which improves the space utilization of the battery device, thereby improving the energy density of the battery device with the same volume.

[0032] In some embodiments, the second connecting part and the third connecting part of the water inlet joint form a first main flow channel, the first main flow channel is in communication with the first connecting pipe, the current collector has a first branch flow channel and a second branch flow channel, the first branch flow channel is in communication with the first main flow channel and the medium flow channel, and the second branch flow channel is in communication with the first main flow channel and the water inlet joint.

[0033] The second connecting part and the third connecting part of the water outlet joint form a second main flow channel, the second main flow channel is in communication with the second connecting pipe, the current collector further has a third branch flow channel and a fourth branch flow channel, the third branch flow channel is in communication with the second main flow channel and the medium flow channel, and the fourth branch flow channel is in communication with the second main flow channel and the water outlet joint.

[0034] Thus, the main flow channel can be used to transport the heat exchange medium, so that the heat exchange medium flows through the connecting pipe to the area where each current collector is located. The branch flow channel can enable the heat exchange medium to flow into the medium flow channel of the heat exchange piece. The joint can provide the functions of the inlet and outlet of the heat exchange medium, so that the heat exchange medium can be filled or discharged from the main flow channel, thereby ensuring the reliability of the heat exchange assembly.

[0035] In some embodiments, the medium flow channel includes a plurality of first chambers and a plurality of second chambers, and the current collector further includes a first current collecting piece and a second current collecting piece, the first current collecting piece is in communication with the first branch flow channel and the first chamber, and the second current collecting piece is in communication with the third branch flow channel and the second chamber.

[0036] Thus, the current collector can have a branch flow function, which can reduce the probability of vortex dead zones of the heat exchange medium flowing into the medium flow channel, reduce local flow resistance, thereby helping to optimize the flow path of the heat exchange medium in the medium flow channel, ensure that the heat exchange medium can uniformly flow through each chamber, and improve the uniformity of heat exchange.

[0037] In some embodiments, along the first direction, the central axis of the first connecting pipe and the central axis of the second connecting pipe overlap each other.

[0038] Thus, in the first direction, the projections of the first connecting pipe and the second connecting pipe have an overlapping area, so that the space occupied by the first connecting pipe and the second connecting pipe as a whole can be further reduced.

[0039] In some embodiments, the battery device further comprises a connecting structure, one end of the connecting structure is connected to the first connecting pipe, and the other end of the connecting structure is connected to the second connecting pipe.

[0040] In this way, the connecting structure can enhance the stability of the first connecting pipe and the second connecting pipe as a whole, so that the first connecting pipe and the second connecting pipe are not prone to displacement or misalignment during use. At the same time, the connecting structure can make the first connecting pipe and the second connecting pipe form an integrated structure, so that the first connecting pipe and the second connecting pipe do not need to be assembled separately, thereby improving the assembly efficiency.

[0041] In some embodiments, the number of connecting structures is a plurality, and the plurality of connecting structures are arranged at intervals along a second direction intersecting the first direction.

[0042] In this way, the plurality of connecting structures can further enhance the stability of the first connecting pipe and the second connecting pipe as a whole. Even if one of the connecting structures fails, the first connecting pipe and the second connecting pipe can still form a stable connection through the other connecting structures.

[0043] In some embodiments, each of the connecting structures is arranged between two adjacent current collectors.

[0044] In this way, arranging the connecting structure between the current collectors can optimize the spatial layout inside the battery device, reduce the occupation of the connecting structure to the internal space of the battery device, and improve the space utilization.

[0045] In some embodiments, the connecting structure further comprises a connecting rib, a first sleeve and a second sleeve, the first sleeve is sleeved on the first connecting pipe, the second sleeve is sleeved on the second connecting pipe, and the connecting rib connects the first sleeve and the second sleeve.

[0046] In this way, by arranging the first sleeve and the second sleeve, the number of connecting points between the connecting structure and the first connecting pipe and the second connecting pipe is increased, so that the connection stability between the connecting structure and the first connecting pipe and the second connecting pipe is improved, so that the connecting structure and the first connecting pipe and the second connecting pipe are not prone to connection failure.

[0047] In some embodiments, the connecting rib comprises a first part and a second part connected at an angle to the first part, the first part is connected to the first sleeve, and the second part is connected to the second sleeve.

[0048] In this way, since the first part and the second part are connected at an angle, the connecting rib can be applied to the first connecting pipe and the second connecting pipe with different center distances, thereby improving the commonality of the connecting structure.

[0049] In some embodiments, the connecting rib comprises a first connecting section, a second connecting section and a third connecting section, the first connecting section is connected with the first collar, the second connecting section is connected with the second collar, the third connecting section is an open ring structure, and the first connecting section and the second connecting section are connected on opposite sides of the third connecting section.

[0050] In this way, the third connecting section of the ring structure can more evenly disperse the stress on the connecting rib, reduce local stress concentration, thereby improving the overall stability of the connecting rib, and further improving the reliability of the connection between the first connecting pipe and the second connecting pipe. At the same time, the third connecting section can also absorb manufacturing tolerances, thereby reducing the probability of deformation or skewing of the first connecting pipe and the second connecting pipe.

[0051] In some embodiments, the third connecting section has a via hole, and the extension direction of the via hole is parallel to the length direction of the first connecting pipe.

[0052] In this way, the third connecting section can absorb the manufacturing tolerances of the first connecting pipe and the second connecting pipe along the length direction of the first connecting pipe, thereby reducing the probability of deformation or skewing of the first connecting pipe and the second connecting pipe.

[0053] In some embodiments, the third connecting section has a via hole, and the extension direction of the via hole is perpendicular to the length direction of the first connecting pipe.

[0054] In this way, the third connecting section can absorb the manufacturing tolerances of the first connecting pipe and the second connecting pipe along the length direction of the first connecting pipe, thereby reducing the probability of deformation or skewing of the first connecting pipe and the second connecting pipe.

[0055] In some embodiments, the axial dimension of the third connecting section is greater than the axial dimension of the first collar.

[0056] In this way, the third connecting section can swing along the extension direction of the via hole, thereby absorbing the manufacturing tolerances of the first connecting pipe and the second connecting pipe along the extension direction of the via hole, thereby reducing the probability of deformation or skewing of the first connecting pipe and the second connecting pipe.

[0057] In some embodiments, the axial dimension of the third connecting section is less than or equal to the axial dimension of the first collar.

[0058] In this way, the third connecting section can swing along the radial direction of the via hole, thereby absorbing the manufacturing tolerances of the first connecting pipe and the second connecting pipe along the radial direction of the via hole, thereby reducing the probability of deformation or skewing of the first connecting pipe and the second connecting pipe.

[0059] In some embodiments, the battery device comprises a plurality of battery cells arranged in a plurality of columns along a third direction, and the heat exchange body extends along the third direction and is connected to a first wall of each battery cell, the first wall being a wall with the largest surface area in the battery cell.

[0060] In this way, since the heat exchange body is connected to the first wall with the largest surface area in the battery cell, the heat exchange body can more effectively regulate the temperature of the battery cell.

[0061] In some embodiments, the battery cell comprises two second walls arranged opposite to each other in the third direction, and the second walls of two adjacent battery cells are arranged in alignment in the third direction.

[0062] In this way, the battery cells can be closely arranged together, and this arrangement can more effectively utilize the space inside the battery device and improve the space utilization of the battery device.

[0063] In some embodiments, the heat exchange body and the battery cell are arranged alternately in a second direction, and the second direction intersects the third direction.

[0064] In this way, the plurality of battery cells and the plurality of heat exchange bodies are connected to each other to form an integral whole, which is accommodated in the box. This can effectively manage the heat of each column of battery cells and ensure the structural strength of the entire battery device, thereby improving the performance of the battery device.

[0065] In some embodiments, the heat exchange body is bonded to the first wall.

[0066] In this way, the bonding connection provides a secure fixing method, enhances the structural stability between the heat exchange body and the first wall of the battery cell, and reduces displacement or damage due to vibration or impact during operation of the battery device. This allows the heat exchange body to continuously adhere to the first wall to continuously regulate the temperature of the battery cell.

[0067] In some embodiments, the bottom wall of the box is connected to the battery cell, and the side wall of the box is spaced apart from the battery cell, and the minimum distance between the side wall of the box and the battery cell is in the range of [5mm, 35mm].

[0068] Since the space occupied by the heat exchange assembly in the box is reduced, the volume of the battery cell can be set larger. Within the above numerical range, the battery cell is not prone to friction with the side wall of the box, and can have a larger volume, thereby achieving a higher energy density.

[0069] In a second aspect, the embodiments of the present application provide a power utilization device, comprising the battery device described in any one of the above embodiments, and the battery device is used to provide electric energy.

[0070] Since the power consuming device comprises the battery device as described above, at least all the advantages of the battery device as described above are included, which will not be repeated here.

[0071] The above description is only a summary of the technical solutions of the present application. In order to make the technical means of the present application more clear, the present application can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following specific embodiments of the present application are described. BRIEF DESCRIPTION OF DRAWINGS

[0072] Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The accompanying drawings are included to provide a description of the preferred embodiments, and are not meant to limit the present application. Moreover, the same reference numerals in all the drawings represent the same or similar elements. In the drawings:

[0073] Figure 1 is a structural schematic diagram of a power consuming device provided by some embodiments of the present application;

[0074] Figure 2 is an exploded schematic diagram of a battery device provided by some embodiments of the present application;

[0075] Figure 3 is a partial structural schematic diagram of a battery device provided by some embodiments of the present application;

[0076] Figure 4 is a partial structural schematic diagram of a battery device provided by some embodiments of the present application; Figure 3

[0077] Figure 5 is a partial structural schematic diagram of a battery device provided by some embodiments of the present application;

[0078] Figure 6 is a partial structural schematic diagram of a battery device provided by some embodiments of the present application;

[0079] Figure 7 is a partial structural schematic diagram of a battery device provided by some embodiments of the present application; Figure 6

[0080] Figure 8 is a schematic diagram of the assembly structure of a heat exchange main body and a joint provided by some embodiments of the present application;

[0081] Figure 9 is a schematic diagram of the assembly structure of a heat exchange main body and a joint provided by some embodiments of the present application;

[0082] Figure 10 is a sectional view of the assembly structure in the A-A direction of Figure 9 .​​

[0083] Figure 11 is a schematic view of an assembly structure of a heat exchange main body and a joint according to some embodiments of the present application;

[0084] Figure 12 is a schematic view of a part of the assembly structure of Figure 11 ;

[0085] Figure 13 is a schematic view of an assembly structure of a heat exchange main body and a joint according to some embodiments of the present application;

[0086] Figure 14 is a schematic view of a part of a battery device according to some embodiments of the present application;

[0087] Figure 15 is a schematic view of an assembly structure of a connection structure, a first connection pipe and a second connection pipe according to some embodiments of the present application;

[0088] Figure 16 is a schematic view of an assembly structure of a connection structure, a first connection pipe and a second connection pipe according to some embodiments of the present application;

[0089] Figure 17 is a schematic view of an assembly structure of a connection structure, a first connection pipe and a second connection pipe according to some embodiments of the present application;

[0090] Figure 18 is a schematic view of another view of the assembly structure of Figure 15 ;

[0091] Figure 19 is a schematic view of another view of the assembly structure of Figure 16 ;

[0092] Figure 20 is a schematic view of another view of the assembly structure of Figure 17 ;

[0093] Figure 21 is a schematic view of an assembly structure of a connection structure, a first connection pipe and a second connection pipe according to some embodiments of the present application;

[0094] Figure 22 is a schematic view of another view of the assembly structure of Figure 21 ;

[0095] Figure 23 is a schematic view of a part of a battery device according to some embodiments of the present application.

[0096] BRIEF DESCRIPTION OF THE DRAWINGS

[0097] Battery device 100; box 101; interface 1012; battery cell 10; heat exchange assembly 102; heat exchange main body 103; connecting piece 30; joint 104; heat exchange piece 105; current collector 20; medium flow channel 21; first connecting part 106; second connecting part 107; third connecting part 108; water inlet joint 40; water outlet joint 50; first section 41; second section 42; third section 51; fourth section 52; first side surface 22; second side surface 23; first connecting pipe 31; second connecting pipe 32; first main flow channel 310; first branch flow channel 24; second branch flow channel 25; second main flow channel 320; third branch flow channel 26; fourth branch flow channel 27; first cavity 210; second cavity 211; first current collecting piece 28; second current collecting piece 29; connecting structure 60; connecting rib 61; first collar 62; second collar 63; first part 610; second part 611; first connecting section 612; second connecting section 613; third connecting section 614; via hole 6140; first wall 11; second wall 12; electric device 1000; controller 200; motor 300; first box 1010; second box 1011. DETAILED DESCRIPTION

[0098] The embodiments of the technical scheme of the present application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, and cannot limit the protection scope of the present application.

[0099] 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof in the specification and the claims and the above description of the drawings are intended to cover not exclusive inclusion.

[0100] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0101] In this paper, "embodiment" means that the specific features, structures or properties described in conjunction with the embodiment can be included in at least one embodiment of the present application. The appearance of this phrase in the specification does not necessarily mean the same embodiment, nor is it an independent or alternative embodiment that is not mutually exclusive with other embodiments. The skilled person in the art explicitly and implicitly understands that the embodiments described herein can be combined with other embodiments.

[0102] In the description of the embodiments of the present application, the term "and / or" is merely an association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " herein generally represents an "or" relationship between the front and rear associated objects.

[0103] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0104] In the description of the embodiments of the present application, the technical terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship shown in the drawings, which is only for the convenience of describing the embodiments of the present application and simplifying the description, and does not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the present application.

[0105] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0106] At present, from the development of market situation, the application of battery is more and more extensive. The battery is not only applied to the energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely applied to electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of the battery, the demand of the market is also increasing.

[0107] In the design and application of the battery device, the temperature control of the battery monomer is crucial to ensure the battery performance, prolong the battery life and ensure the use safety. In order to effectively cool the battery monomers inside the battery device, it is usually necessary to integrate a heat exchange component. The heat exchange component can include a plurality of heat exchange bodies, which can be connected with the outer surfaces of a plurality of battery monomers to exchange heat with the plurality of battery monomers.

[0108] In order to continuously regulate the temperature of the battery cells, the heat exchange medium needs to be introduced into the heat exchange body to realize the circulation of the heat exchange medium, so as to improve the temperature regulation effect.

[0109] The interface is provided on the box to meet the supply requirement of the heat exchange medium. In order to transport the heat exchange medium input by the interface to the plurality of heat exchange bodies, a header can be arranged at the interface, and a plurality of water inlet pipes are used to connect the header and the heat exchange bodies, and a plurality of water outlet pipes are used to connect the header and the heat exchange bodies. However, the arrangement of these water inlet pipes and water outlet pipes in the battery device occupies a large space, which makes the space utilization in the battery device low, so that the energy density of the battery device is low under the condition of the same volume.

[0110] Based on the above considerations, the battery device provided by the embodiments of the present application is provided. In the battery device, the joint is arranged to connect the interface and the heat exchange body, or to connect the interface and the connecting piece. And the joint is located at one side of the box, so that the joint of the interface and the heat exchange assembly is integrated in the same area, which reduces the overall space occupation of the heat exchange assembly and the interface, improves the space utilization in the battery device, and enables the battery device to accommodate a larger volume of battery cells, thereby realizing a higher energy density under the condition of the same volume.

[0111] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of the power utilization device 1000 provided by some embodiments of the present application. The technical solutions described in the embodiments of the present application are applicable to various power utilization devices 1000 using the battery device 100, for example, mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc.

[0112] The following embodiments are described by taking a vehicle as an example for the convenience of description.

[0113] The vehicle is internally provided with the battery device 100, which can be arranged at the bottom, head or 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 the operating power supply of the vehicle.

[0114] The vehicle can further include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle during starting, navigation and driving.

[0115] In the embodiments of the present application, the battery apparatus 100 can not only serve as an operating power source of the vehicle, but also serve as a driving power source of the vehicle, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle.

[0116] Please refer to Figure 2 , Figure 2 is an explosion schematic diagram of the battery apparatus 100 provided by some embodiments of the present application. The battery apparatus 100 (Battery Apparatus) mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) can include a plurality of battery cells 10 connected in series, in parallel, or in a mixed connection through a busbar component.

[0117] In the embodiments of the present application, the battery cell 10 can be a secondary battery, which refers to a battery cell 10 that can be activated by charging after discharging to continue to be used.

[0118] The battery cell 10 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc., which is not limited in the embodiments of the present application.

[0119] In some embodiments, the battery cell assembly (Battery Cell Assembly) is usually formed by arranging a plurality of battery cells 10.

[0120] As an example, the battery cell assembly can be a battery module (Battery Module) formed by arranging and fixing a plurality of battery cells 10 into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells 10 with a cable tie.

[0121] In some embodiments, the battery apparatus 100 can be a battery pack (battery Pack) including a box 101 and one or more battery cell assemblies accommodated in the box 101.

[0122] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be accommodated in the box 101 by fixing the battery module in the box 101.

[0123] As an example, the battery cell assembly can also be accommodated in the box 101 by directly fixing a plurality of battery cells 10 in the box 101.

[0124] As an example, the box 101 can include a first box 1010 and a second box 1011. The first box 1010 and the second box 1011 are buckled so that an enclosed space is formed inside the box 101 to accommodate the battery monomer assembly. The enclosed here means covered or closed, which can be sealed or unsealed. The first box 1010 can be a top cover or a bottom plate.

[0125] As an example, the box 101 can include a top cover, a frame and a bottom plate. The top cover and the bottom plate are connected with the frame respectively, so that an enclosed space is formed inside the box 101 to accommodate the battery monomer assembly.

[0126] In some embodiments, the box 101 can be part of the chassis structure of the vehicle. For example, part of the box 101 can be at least part of the floor of the vehicle, or part of the box 101 can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0127] In some embodiments, the battery device 100 can be an energy storage device. The energy storage device includes an energy storage container, an energy storage cabinet, etc.

[0128] Please refer to Figures 3 to 7 . Figure 3 is a partial structure diagram of the battery device 100 provided by some embodiments of the present application; Figure 4 is an enlarged diagram of part a of the battery device 100 of Figure 3 . Figure 5 is a partial structure diagram of the battery device 100 provided by some other embodiments of the present application; Figure 6 is a partial structure diagram of the battery device 100 provided by some other embodiments of the present application; Figure 7 is an enlarged diagram of part b of the battery device 100 of Figure 6 . The present application provides a battery device 100, which includes a box 101, a battery monomer 10 and a heat exchange assembly 102. The box 101 has an interface 1012; the battery monomer 10 is arranged in the box 101; the heat exchange assembly 102 is configured to exchange heat with the battery monomer 10; wherein the heat exchange assembly 102 includes a plurality of heat exchange bodies 103, a connecting piece 30 and a joint 104. The plurality of heat exchange bodies 103 are in contact with the battery monomer 10; the connecting piece 30 connects the plurality of heat exchange bodies 103; the joint 104 connects the interface 1012 and the heat exchange body 103, or connects the interface 1012 and the connecting piece 30; wherein the joint 104 is located on one side of the box 101.

[0129] Specifically, the number of the interface 1012 can be one or more. The interface 1012 can be arranged on the side wall of the box 101.

[0130] The number of battery cells 10 can be two, three, four or even more. The plurality of battery cells 10 can be connected to each other or spaced from each other.

[0131] The heat exchange assembly 102 is a component for regulating the temperature of the battery cell 10, ensuring that the battery cell 10 works within an optimal working temperature range.

[0132] The heat exchange body 103 can be a part of the heat exchange assembly 102 for providing heat exchange function. The number of heat exchange bodies 103 can be two, three, four or even more.

[0133] One or a row of battery cells 10 can be arranged between two adjacent heat exchange bodies 103, in which case the two heat exchange bodies 103 simultaneously exchange heat with the one or row of battery cells 10. Two or two rows of battery cells 10 can also be arranged between two adjacent heat exchange bodies 103, in which case the two heat exchange bodies 103 can exchange heat with one or a row of battery cells 10 respectively.

[0134] The heat exchange body 103 can be made of high thermal conductivity material, such as aluminum or copper, to improve heat exchange efficiency. The heat exchange body 103 can be filled with heat exchange medium, which exchanges heat with the wall of the heat exchange body 103, so as to achieve heat exchange between the heat exchange body 103 and the battery cell 10. The heat exchange medium can be water, a mixture of water and ethylene glycol, refrigerant or air, etc. The heat exchange medium can be circulated to achieve better temperature regulation effect.

[0135] Heat exchange refers to heating or cooling the battery cell 10. In the case of cooling the battery cell 10, the heat exchange body 103 can contain cooling medium to regulate the temperature of the battery cell 10, in which case the heat exchange body 103 can also be referred to as a cooling component or a cooling plate, etc. The cooling medium can be a cooling liquid or a cooling gas. In addition, the heat exchange body 103 can also be used for heating, which is not limited in the embodiments of the present application.

[0136] The heat exchange body 103 can be connected to the heat exchange medium through the connector 30 or the joint 104 to achieve circulation of the heat exchange medium, thereby improving the heat exchange effect. The "contact between the heat exchange body 103 and the battery cell 10" refers to direct or indirect physical contact between the heat exchange body 103 and the battery cell 10 to achieve heat exchange. Specifically, the heat exchange body 103 transfers the heat generated by the battery cell 10 to the heat exchange medium (such as cooling liquid or air) in the heat exchange body 103 through contact with the battery cell 10, thereby regulating the temperature of the battery cell 10.

[0137] The heat exchange main body 103 and the battery cell 10 can achieve heat exchange through direct contact. For example, the outer surface of the heat exchange main body 103 is attached to the outer surface of the battery cell 10. The heat exchange main body 103 and the battery cell 10 can also achieve indirect contact through a heat conduction layer. For example, the heat exchange main body and the battery cell can achieve contact through a thin heat conduction layer (such as heat conduction glue, heat conduction pad, etc.) to improve the heat exchange efficiency.

[0138] The connecting piece 30 can be a circular tube, a square tube, or a tube of other shapes. The connecting piece 30 and the heat exchange main body 103 can be connected through welding, bonding, etc. The connecting piece 30 and the heat exchange main body 103 can also be integrally formed.

[0139] The joint 104 is a part for connecting pipelines. The joint 104 can be a pipe joint, a flange joint, etc. One end of the joint 104 can be connected with the interface 1012. The joint 104 can be connected with the interface 1012 through flange connection, welding, etc. For example, the outer side of the joint 104 can be provided with external threads, and the inner side of the interface 1012 can be provided with internal threads. The joint 104 and the interface 1012 can be screwed together through the external threads and the internal threads. The joint 104 can be provided in the interface 1012 to facilitate connection with equipment outside the battery device 100.

[0140] The other end of the joint 104 can be connected with the heat exchange main body 103 or the connecting piece 30. In one embodiment, the joint 104 can be provided on the heat exchange main body 103 through a flange or a pipeline quick connector, etc. to improve the disassembly efficiency of the joint 104. In another embodiment, the joint 104 can be provided on the connecting piece 30 through welding, sleeving, etc.

[0141] The joint 104 can be used for the heat exchange medium to flow into or out of the heat exchange main body 103. The heat exchange medium outside the heat exchange assembly 102 can be input into the joint 104 through the interface 1012 and further input into the heat exchange main body 103 or the connecting piece 30. The heat exchange medium inside the heat exchange assembly 102 can be directly output to the interface 1012 by the heat exchange main body 103 through the joint 104, or can be input to the joint 104 by the heat exchange main body 103 through the connecting piece 30, and then output to the interface 1012 through the joint 104. Therefore, by providing the joint 104, the circulation of the heat exchange medium can be achieved, thereby improving the heat exchange effect of the heat exchange main body 103.

[0142] The joint 104 is located on one side of the box body 101, which means that the joint 104 is arranged close to the side wall of the box body 101. The joint 104 can be arranged adjacent to the interface 1012 arranged on the side wall of the box body 101.

[0143] Since the joint 104 connects the interface 1012 and the heat exchange main body 103 or connects the interface 1012 and the connecting piece 30, and the joint 104 is located at one side of the box body 101, the interface 1012 and the joint 104 of the heat exchange assembly 102 are integrated in the same area, which reduces the space occupation of the heat exchange assembly 102 and the interface 1012 as a whole, improves the space utilization in the battery device 100, and enables the battery device 100 to accommodate a battery monomer 10 with a larger volume, thereby achieving a higher energy density under the condition of the same volume.

[0144] Please refer to Figure 5 and Figure 7 In some embodiments, the number of joints 104 is multiple, and the multiple joints 104 are located at the same side of the box body 101.

[0145] Specifically, the number of joints 104 can be two, three, four or even more. For example, the number of joints 104 is two, one of which is used for the inflow of the heat exchange medium into the heat exchange main body 103, and the other is used for the outflow of the heat exchange medium from the heat exchange main body 103.

[0146] Therefore, since the multiple joints 104 are located at the same side of the box body 101, the multiple joints 104 occupy a smaller space in the box body 101, which can improve the space utilization in the battery device 100, enable the battery device 100 to accommodate a battery monomer 10 with a larger volume, and thereby achieve a higher energy density under the condition of the same volume.

[0147] Please refer to Figure 3 and Figure 4 In some embodiments, the joint 104 is located at one side of the length direction of the box body 101.

[0148] In actual use, the side of the length direction of the box body 101 is close to other equipment outside the battery device 100. Therefore, arranging the joint 104 at the side of the length direction of the box body 101 facilitates the connection of the joint 104 with other equipment outside the battery device 100.

[0149] Please refer to Figure 8 , Figure 9 and Figure 10 . Figure 8 is a schematic view of the assembly structure of the heat exchange main body 103 and the joint 104 provided in some embodiments of the present application; Figure 9 is a schematic view of the assembly structure of the heat exchange main body 103 and the joint 104 provided in some embodiments of the present application; Figure 10 is Figure 9Figure 6 is a cross-sectional view of the assembly structure along the A-A direction. In some embodiments, the heat exchange body 103 comprises heat exchange pieces 105 and current collectors 20, the heat exchange pieces 105 have a medium flow channel 21 inside, the heat exchange pieces 105 are arranged between adjacent battery cells 10, the current collectors 20 are connected to at least one end of the heat exchange pieces 105, the current collectors 20 are connected to the medium flow channel 21, and the two side walls of the current collectors 20 are connected to the connecting pieces 30, and the two adjacent current collectors 20 are connected through the connecting pieces 30.

[0150] Specifically, the outer wall of the heat exchange piece 105 can be in contact with the outer wall of the battery cell 10. In use, the medium flow channel 21 inside the heat exchange piece 105 has a heat exchange medium, and the heat exchange medium can exchange heat with the outer wall of the heat exchange piece 105, so that the heat exchange piece 105 exchanges heat with the battery cell 10.

[0151] The medium flow channel 21 is a channel inside the heat exchange piece 105 for the flow of the heat exchange medium. The medium flow channel 21 ensures that the heat exchange medium can be uniformly distributed to each part of the heat exchange piece 105, improving the heat exchange efficiency. The medium flow channel 21 can be linear, serpentine or other complex flow channel structures, and the specific shape is determined according to the actual application requirements. The size and shape of the medium flow channel 21 should ensure that the heat exchange medium can flow smoothly, avoiding blockage and excessive flow resistance.

[0152] The heat exchange piece 105 can have one or more medium flow channels 21. For example, each heat exchange piece 105 can have one medium flow channel 21. For another example, each heat exchange piece 105 can have two medium flow channels 21, which can be independent or interconnected. The shape of the heat exchange piece 105 can be adapted to the shape of the battery cell 10. For example, the heat exchange piece 105 can be cuboid-shaped to facilitate the contact of the cuboid-shaped battery cell 10 with the heat exchange piece 105.

[0153] The current collector 20 is a component connected to the heat exchange piece 105, used to collect and distribute the heat exchange medium. The current collector 20 is connected to at least one end of the heat exchange piece 105, ensuring that the heat exchange medium can uniformly enter and flow out of the heat exchange piece 105, improving the heat exchange efficiency. The current collector 20 can be a box-shaped, plate-shaped or other shaped structure, and the specific shape is determined according to the actual application requirements. The inside of the current collector 20 can be designed with a flow guide structure to optimize the flow path of the heat exchange medium.

[0154] The connection between the current collector 20 and the heat exchange member 105 can be welding, bonding, or the like. The current collector 20 can be provided with a flow channel in communication with the medium channel, so that the heat exchange medium can flow between the heat exchange member 105 and the current collector 20. The connection between the current collector 20 and the connecting member 30 can be welding, bonding, or the like. For example, the opposite regions of two adjacent current collectors 20 can be provided with through holes, and the connecting member 30 can be bonded around the through holes, so that the two adjacent current collectors 20 are connected through the connecting member 30.

[0155] Thus, since the two adjacent current collectors are connected through the connecting member 30, it is not necessary to provide a corresponding liquid inlet device, such as the joint 104, for each current collector 20, which improves the space utilization in the battery device 100, so that the battery device 100 can accommodate a larger volume of battery monomers 10, thereby achieving a higher energy density under the condition of the same volume.

[0156] In addition, the heat exchange member 105 arranged between the adjacent battery monomers 10 can simultaneously exchange heat with two battery monomers 10, which reduces the space occupation of the heat exchange member 105, thereby improving the space utilization in the battery device 100, so that the battery device 100 can accommodate a larger volume of battery monomers 10, thereby achieving a higher energy density under the condition of the same volume.

[0157] Please refer to Figure 11 , Figure 11 is a schematic view of an assembly structure of the heat exchange body 103 and the joint 104 provided by some embodiments of the present application; Figure 12 is Figure 11 is an enlarged schematic view of part c of the assembly structure. In some embodiments, the joint 104 includes a first connecting portion 106, a second connecting portion 107, and a third connecting portion 108, one end of the first connecting portion 106 is connected to the interface 1012, and the second connecting portion 107 and the third connecting portion 108 are connected to the two connecting members 30 connecting the two adjacent current collectors 20.

[0158] Specifically, the joint 104 can be a tee joint. The first connecting portion 106, the second connecting portion 107, and the third connecting portion 108 can be three parts of the tee joint.

[0159] In one embodiment, the heat exchange medium can enter the joint 104 from the interface 1012 through the first connecting portion 106, and then be distributed into the second connecting portion 107 and the third connecting portion 108, and then flow into the connecting members 30 located on both sides of the joint 104 from the second connecting portion 107 and the third connecting portion 108, and then be distributed into the current collectors 20.

[0160] In one embodiment, the heat exchange medium can also flow from the second connecting portion 107 and the third connecting portion 108 to the first connecting portion 106, and flow out through the interface 1012.

[0161] The first connecting portion 106, the second connecting portion 107 and the third connecting portion 108 can be a pipe connecting interface 1012, a flange connecting interface 1012 or other forms of connecting points.

[0162] In this way, by arranging the connector 104, the heat exchange medium can flow between the first connecting portion 106 and the interface 1012, and can flow between the second connecting portion 107 or the third connecting portion 108 and the connecting piece 30. The connector 104 arranged in this way has a low flow resistance when the heat exchange medium flows, and can avoid backflow of the heat exchange medium, thereby improving the heat exchange efficiency.

[0163] Please refer to Figure 7 and Figure 8 In some embodiments, the connector 104 includes the first connecting portion 106, the second connecting portion 107 and the third connecting portion 108. One end of the first connecting portion 106 is connected to the end of the current collector 20 away from the heat exchange piece 105, and the other end of the first connecting portion 106 is connected to the interface 1012. One end of the second connecting portion 107 is connected to one of the two side walls of the current collector 20 opposite to the heat exchange piece 105, and the other end of the second connecting portion 107 is connected to the connecting piece 30 on one side of the current collector 20. One end of the third connecting portion 108 is connected to the other of the two side walls of the current collector 20 opposite to the heat exchange piece 105, and the other end of the third connecting portion 108 is connected to the connecting piece 30 on the other side of the current collector 20.

[0164] Specifically, the first connecting portion 106 is used to connect the interface 1012 and the current collector 20. The second connecting portion 107 and the third connecting portion 108 are used to connect the current collector 20 and different connecting pieces 30. Through the first connecting portion 106, the heat exchange medium enters the connector 104 from the outside. Through the second connecting portion 107, the heat exchange medium enters the current collector 20 from the connector 104, and is then distributed to each heat exchange piece 105 to exchange heat with the battery monomer 10.

[0165] In one embodiment, the heat exchange medium can enter the current collector 20 from the interface 1012 through the first connecting portion 106, and then be distributed to the second connecting portion 107 and the third connecting portion 108, and flow into the connecting pieces 30 on both sides of the current collector 20 from the second connecting portion 107 and the third connecting portion 108, respectively.

[0166] In one embodiment, the heat exchange medium can also flow from the second connecting portion 107 and the third connecting portion 108 to the current collector 20, flow out of the current collector 20 through the first connecting portion 106, and then flow out through the interface 1012.

[0167] In this way, by connecting each part of the joint 104 to different parts of the current collector 20 and connecting the connecting piece 30, the split joint 104 design can reduce the space occupation of the joint 104, thereby improving the space utilization in the battery device 100, so that the battery device 100 can accommodate a larger volume of battery monomers 10, thereby achieving a higher energy density under the condition of the same volume.

[0168] Please refer to Figure 8 In some embodiments, the number of joints 104 is two, one of which is the water inlet joint 40, and the other is the water outlet joint 50, and the water inlet joint 40 and the water outlet joint 50 are arranged on the same current collector 20.

[0169] Specifically, the heat exchange medium can flow into the current collector 20 through the water inlet joint 40, and can flow out of the current collector 20 through the water outlet joint 50.

[0170] In this way, arranging the water inlet joint 40 and the water outlet joint 50 on the same current collector 20 can reduce the overall space occupation of the water inlet joint 40 and the water outlet joint 50, thereby improving the space utilization in the battery device 100, and enabling the battery device 100 to accommodate a larger volume of battery monomers 10, thereby achieving a higher energy density under the condition of the same volume.

[0171] Please refer to Figure 8 In some embodiments, the water inlet joint 40 and the water outlet joint 50 are arranged along the first direction z.

[0172] Specifically, the first direction z can be parallel to the extension direction of the side of the current collector 20 close to the joint 104, or can intersect the extension direction of the side of the current collector 20 close to the joint 104.

[0173] In this way, by arranging the water inlet joint 40 and the water outlet joint 50 along the first direction z, the space occupation of the water inlet joint 40 and the water outlet joint 50 in other directions is reduced, thereby reducing the overall space occupation of the water inlet joint 40 and the water outlet joint 50.

[0174] Please refer to Figure 9 and Figure 10 In some embodiments, along the first direction z, the central axis of the water inlet joint 40 and the central axis of the water outlet joint 50 overlap each other.

[0175] Specifically, when the shape and size of the water inlet joint 40 and the water outlet joint 50 are the same, the projections of the water inlet joint 40 and the water outlet joint 50 in the first direction z can completely overlap. When the shape and size of the water inlet joint 40 and the water outlet joint 50 are different, the projections of the water inlet joint 40 and the water outlet joint 50 in the first direction z have an overlapping area.

[0176] For the cuboid-shaped current collector 20, the first direction z can be the extension direction of the side corresponding to the long side or the short side of the current collector 20.

[0177] In this way, in the first direction z, the projections of the water inlet joint 40 and the water outlet joint 50 have an overlapping area, so that the space occupation of the water inlet joint 40 and the water outlet joint 50 as a whole can be further reduced.

[0178] Please refer to Figure 5 and Figure 13 , Figure 13 is a schematic diagram of the assembly structure of the heat exchange main body 103 and the joint 104 provided by some embodiments of the present application. In some embodiments, the first connecting part 106 of the water inlet joint 40 includes a first section 41 and a second section 42, the first section 41 and the second section 42 are connected at an angle, and the first section 41 is connected with the current collector 20; the first connecting part 106 of the water outlet joint 50 includes a third section 51 and a fourth section 52, the third section 51 and the fourth section 52 are connected at an angle, and the third section 51 is in communication with the current collector 20; wherein the first section 41 and the second section 42 are parallel to each other, and the third section 51 and the fourth section 52 are parallel to each other.

[0179] Specifically, the angle between the first section 41 and the second section 42 can be set according to requirements. For example, the angle between the first section 41 and the second section 42 can be a right angle, at which time the water inlet joint 40 is in the shape of “L”. The angle between the third section 51 and the fourth section 52 can also be set according to requirements. For example, the angle between the third section 51 and the fourth section 52 can be a right angle, at which time the water outlet joint 50 is in the shape of “L”. The water inlet joint 40 and the water outlet joint 50 in the shape of “L” can be suitable for the connection requirements in the first direction z.

[0180] In order to avoid interference between the water inlet joint 40 and the water outlet joint 50, the length of the third section 51 can be greater than the length of the first section 41. The length of the fourth section 52 can be greater than the length of the second section 42.

[0181] In this way, since the first section 41 and the second section 42 and the third section 51 and the fourth section 52 of the joint 104 are parallel to each other, this layout helps to make more effective use of space, thereby improving the space utilization of the battery device 100.

[0182] In some embodiments, the number of the connectors 104 is two, one of which is the water inlet connector 40 and the other is the water outlet connector 50, and the water inlet connector 40 and the water outlet connector 50 are arranged on two adjacent current collectors 20 respectively.

[0183] Specifically, the water inlet connector 40 and the water outlet connector 50 can be connected to the corresponding parts on the two adjacent current collectors 20 by means of adhesion, welding or the like, or can be integrally formed with the corresponding current collectors 20.

[0184] In this way, arranging the water inlet connector 40 and the water outlet connector 50 on the two adjacent heat exchange assemblies 102 can reduce the overall space occupation of the water inlet connector 40 and the water outlet connector 50. Moreover, arranging the connectors 104 on different heat exchange assemblies 102 can facilitate the layout of the water inlet connector 40 and the water outlet connector 50, thereby facilitating the manufacture of the water inlet connector 40 and the water outlet connector 50 and reducing the manufacturing complexity.

[0185] For more details, please refer to Figure 8 In some embodiments, the current collector 20 includes a first side surface 22 and a second side surface 23 connected to the first side surface 22, the surface area of the second side surface 23 is greater than that of the first side surface 22, the connector 30 is connected to the second side surface 23, and the water inlet connector 40 and the water outlet connector 50 are both connected to the first side surface 22.

[0186] Specifically, in the case where the current collector 20 is in the shape of a cuboid, the second side surface 23 can be the outer surface with a larger area in the cuboid. The first side surface 22 can be the outer surface with a smaller area in the cuboid.

[0187] In this way, the connector 30 is connected to the second side surface 23 with a larger surface area, which facilitates the passage of a larger flow of heat exchange medium into the medium flow channel 21 of the heat exchange member 105, thereby improving the heat exchange efficiency of the heat exchange member 105. The water inlet connector 40 and the water outlet connector 50 are both connected to the first side surface 22 with a smaller surface area, which reduces the space occupation of the water inlet connector 40 and the water outlet connector 50 on the heat exchange member 105, thereby improving the space utilization of the battery device 100.

[0188] For more details, please refer to Figure 14 , Figure 14 is a partial structure schematic diagram of a battery device 100 provided in some embodiments of the present application. In some embodiments, the connector 30 includes a first connecting pipe 31 and a second connecting pipe 32, the first connecting pipe 31 and the second connecting pipe 32 are arranged on the same side of the battery monomer 10, the first connecting pipe 31 and the second connecting pipe 32 are both in communication with the medium flow channel 21, the first connecting pipe 31 is in communication with the water inlet connector 40, the second connecting pipe 32 is in communication with the water outlet connector 50, and the first connecting pipe 31 and the second connecting pipe 32 are arranged in a spaced manner along the first direction z

[0189] Specifically, the number of the first connecting pipe 31 and the second connecting pipe 32 can be one or more. The number of the first connecting pipe 31 and the second connecting pipe 32 can correspond to the number of the water inlet joint 40 and the water outlet joint 50.

[0190] The first connecting pipe 31 and the second connecting pipe 32 can be used to connect the medium flow channels 21 of different heat exchange pieces 105. The first connecting pipe 31 and the second connecting pipe 32 can be connected at different positions of the heat exchange piece 105.

[0191] The heat exchange medium can enter the first connecting pipe 31 through the water inlet joint 40, then flow into the medium flow channel 21 through the first connecting pipe 31, then flow out of the medium flow channel 21 through the second connecting pipe 32, and then flow to the water outlet joint 50 through the second connecting pipe 32.

[0192] The first connecting pipe 31 and the heat exchange piece 105 can be connected by welding, bonding, etc., or the first connecting pipe 31 and the heat exchange piece 105 can be integrally formed. For example, a through hole can be formed on the heat exchange piece 105 to communicate with the medium flow channel 21, and the first connecting pipe 31 is bonded around the through hole to communicate with the medium flow channel 21.

[0193] The second connecting pipe 32 and the heat exchange piece 105 can be connected by welding, bonding, etc., or the second connecting pipe 32 and the heat exchange piece 105 can be integrally formed. For example, a through hole can be formed on the heat exchange piece 105 to communicate with the medium flow channel 21, and the second connecting pipe 32 is bonded around the through hole to communicate with the medium flow channel 21.

[0194] In this way, since the first connecting pipe 31 and the second connecting pipe 32 are arranged on the same side of the battery monomer 10, and the first connecting pipe 31 and the second connecting pipe 32 are arranged along the first direction z, the connecting piece 30 occupies less space in the battery device 100, which improves the space utilization in the battery device 100, thereby improving the energy density of the battery device 100 under the same volume.

[0195] Please refer to Figure 10 In some embodiments, the second connecting portion 107 and the third connecting portion 108 of the water inlet joint 40 are formed with a first main flow channel 310, the first main flow channel 310 communicates with the first connecting pipe 31, the current collector 20 has a first branch flow channel 24 and a second branch flow channel 25, the first branch flow channel 24 communicates the first main flow channel 310 and the medium flow channel 21, and the second branch flow channel 25 communicates the first main flow channel 310 and the water inlet joint 40.

[0196] The second connecting portion 107 and the third connecting portion 108 of the water outlet joint 50 are formed with a second main flow channel 320, which is in communication with the second connecting pipe 32. The current collector 20 further comprises a third flow channel 26 and a fourth flow channel 27. The third flow channel 26 is in communication with the second main flow channel 320 and the medium flow channel 21. The fourth flow channel 27 is in communication with the second main flow channel 320 and the water outlet joint 50.

[0197] Specifically, the number of the first flow channel 24, the second flow channel 25, the third flow channel 26 and the fourth flow channel 27 can be one or more.

[0198] The first main flow channel 310 and the second main flow channel 320 can pass through the corresponding current collector 20. The first flow channel 24 and the second flow channel 25 can be arranged in the current collector 20. The first main flow channel 310 is an inflow channel for the heat exchange medium. The heat exchange medium can flow from the first connecting portion 106 of the water inlet joint 40 to the second flow channel 25, then from the second flow channel 25 to the first main flow channel 310, then from the first main flow channel 310 to the medium flow channel 21, then from the medium flow channel 21 to the third flow channel 26, then from the third flow channel 26 to the second main flow channel 320, then from the second main flow channel 320 to the fourth flow channel 27, and then from the fourth flow channel 27 to the first connecting portion 106 of the water outlet joint 50.

[0199] In this way, the main flow channel can be used to transport the heat exchange medium so that the heat exchange medium flows through the connecting pipe to the area where each current collector 20 is located. The flow channel can enable the heat exchange medium to flow into the medium flow channel 21 of the heat exchange element 105. The joint 104 can provide the functions of the inlet and outlet of the heat exchange medium, so that the heat exchange medium can be filled into or discharged from the main flow channel, thereby ensuring the reliability of the heat exchange assembly 102.

[0200] Please refer to Figure 10 In some embodiments, the medium flow channel 21 comprises a plurality of first chambers 210 and a plurality of second chambers 211. The current collector 20 further comprises a first current collecting element 28 and a second current collecting element 29. The first current collecting element 28 is in communication with the first flow channel 24 and the first chamber 210. The second current collecting element 29 is in communication with the third flow channel 26 and the second chamber 211.

[0201] Specifically, the number of the first chamber 210 can be two, three, four or even more. The number of the second chamber 211 can be two, three, four or even more. The first chamber 210 and the second chamber 211 can be in communication with each other.

[0202] The heat exchange medium can flow from the first chamber 210 to the second chamber 211. The first manifold 20 can be used to distribute the heat exchange medium. The second manifold 20 can be used to collect the heat exchange medium. The first manifold 20 and the first chamber 210 can have a plurality of channel openings. The second manifold 20 and the second chamber 211 can have a plurality of channel openings. When the first distribution channel 24 and the third distribution channel 26 are both one, the first distribution channel 24 can be connected to a corresponding channel opening on the first manifold 20. After the heat exchange medium flows into the first manifold 20 from the first distribution channel 24, the heat exchange medium can be transported to the plurality of first chambers 210 through a plurality of paths. In this way, the heat exchange medium can flow uniformly into each part of the heat exchange assembly 102, thereby reducing the probability of vortex dead zones after the heat exchange medium flows into the first chamber 210, and reducing local flow resistance.

[0203] Then, the heat exchange medium flows from the first chamber 210 to the second chamber 211. The heat exchange medium in the second chamber 211 can flow to the second manifold 20 through a plurality of paths, and be collected by the second manifold 20, so as to flow to the third distribution channel 26. In this way, the heat exchange medium can flow uniformly to each part of the heat exchange element 105, thereby reducing the probability of vortex dead zones after the heat exchange medium flows into the second chamber 211, and reducing local flow resistance.

[0204] In this way, the manifold 20 can have a distribution function, which can reduce the probability of vortex dead zones after the heat exchange medium flows into the medium flow channel 21, and reduce local flow resistance, thereby helping to optimize the flow path of the heat exchange medium in the medium flow channel 21, and ensuring that the heat exchange medium can flow uniformly through each chamber, improving the uniformity of heat exchange.

[0205] Please refer to Figure 14 In some embodiments, along the first direction z, the central axis of the first connecting pipe 31 and the central axis of the second connecting pipe 32 overlap each other.

[0206] Specifically, when the shape and size of the first connecting pipe 31 and the second connecting pipe 32 are the same, the projections of the first connecting pipe 31 and the second connecting pipe 32 in the first direction z can completely overlap. When the shape and size of the first connecting pipe 31 and the second connecting pipe 32 are different, the projections of the first connecting pipe 31 and the second connecting pipe 32 in the first direction z have an overlapping area.

[0207] In this way, in the first direction z, the projections of the first connecting pipe 31 and the second connecting pipe 32 have an overlapping area, so as to further reduce the space occupation of the first connecting pipe 31 and the second connecting pipe 32 as a whole.

[0208] Please refer to Figure 14In some embodiments, the battery device 100 further comprises a connecting structure 60, one end of the connecting structure 60 is connected to the first connecting pipe 31, and the other end of the connecting structure 60 is connected to the second connecting pipe 32.

[0209] Specifically, the connecting structure 60 can be connected to the first connecting pipe 31 or the second connecting pipe 32 by means of threaded connection, welding, etc. The connecting structure 60 and the first connecting pipe 31, and the connecting structure 60 and the second connecting pipe 32 can also be manufactured by means of one-piece forming. For example, the first connecting pipe 31 and the second connecting pipe 32 can be integrally formed by means of injection molding, and the first connecting pipe 31 and the second connecting pipe 32 can share the same outer surface.

[0210] In this way, the connecting structure 60 can enhance the stability of the first connecting pipe 31 and the second connecting pipe 32 as a whole, so that the first connecting pipe 31 and the second connecting pipe 32 are not prone to displacement or misplacement during use. At the same time, the connecting structure 60 can make the first connecting pipe 31 and the second connecting pipe 32 form an integral structure, so that it is not necessary to assemble the first connecting pipe 31 and the second connecting pipe 32 respectively, thereby being able to improve the assembly efficiency.

[0211] Please refer to Figure 14 In some embodiments, the number of connecting structures 60 is multiple, and the multiple connecting structures 60 are arranged at intervals along a second direction x, and the second direction x intersects the first direction z.

[0212] Specifically, the number of connecting structures 60 can be two, three, four or even more. The connecting structure 60 can be connected to multiple positions of the first connecting pipe 31 or the second connecting pipe 32.

[0213] The second direction x can be the extension direction of the first connecting pipe 31 or the second connecting pipe 32, or can be intersected with the above-mentioned extension direction. In the case where the second direction x is the extension direction of the first connecting pipe 31 or the second connecting pipe 32, multiple connecting pipes can be used for positioning and guiding during assembly, so as to avoid the situation that the first connecting pipe 31 and the second connecting pipe 32 are skewed.

[0214] In this way, the multiple connecting structures 60 can further enhance the stability of the first connecting pipe 31 and the second connecting pipe 32 as a whole. Moreover, even if one of the connecting structures 60 fails, the first connecting pipe 31 and the second connecting pipe 32 can still form stable connection through other connecting structures 60.

[0215] Please refer to Figure 14 In some embodiments, each connecting structure 60 is arranged between two adjacent current collectors 20.

[0216] In this way, the connection structure 60 is arranged between the current collectors 20, which optimizes the spatial layout inside the battery device 100, reduces the occupation of the connection structure 60 to the internal space of the battery device 100, and improves the space utilization.

[0217] Please refer to Figure 15 , Figure 16 and Figure 17 , Figure 15 is a schematic view of an assembly structure of the connection structure 60, the first connecting pipe 31 and the second connecting pipe 32 provided by some embodiments of the present application; Figure 16 is a schematic view of an assembly structure of the connection structure 60, the first connecting pipe 31 and the second connecting pipe 32 provided by some embodiments of the present application; Figure 17 is a schematic view of an assembly structure of the connection structure 60, the first connecting pipe 31 and the second connecting pipe 32 provided by some embodiments of the present application. In some embodiments, the connection structure 60 further comprises a connecting rib 61, a first collar 62 and a second collar 63, the first collar 62 is sleeved on the first connecting pipe 31, the second collar 63 is sleeved on the second connecting pipe 32, and the connecting rib 61 connects the first collar 62 and the second collar 63.

[0218] Specifically, the connecting rib 61 can be in the shape of a long strip. The number of the connecting rib 61 can be one or more. The first collar 62 and the second collar 63 are both in the shape of a ring. The number of the first collar 62 and the second collar 63 can both be one or more.

[0219] The inner side of the first collar 62 can be attached to the inner side of the first connecting pipe 31. The inner side of the second collar 63 can be attached to the inner side of the second connecting pipe 32. The connecting rib 61 can be connected to the outer side of the first collar 62 and can be connected to the outer side of the second collar 63.

[0220] The connecting rib 61 and the first collar 62, and the connecting rib 61 and the second collar 63 can be manufactured separately and then connected by means of bonding, welding or the like. In this way, the overall manufacturing cost of the connecting rib 61 is relatively low. The connecting rib 61 and the first collar 62, and the connecting rib 61 and the second collar 63 can also be integrally formed. In this way, the integrally formed connection structure 60 reduces the possible weak points of the connection of the parts, and thus the structural strength of the connection structure 60 is relatively high, so that the connection structure 60 is not prone to breakage during use.

[0221] In this way, by arranging the first collar 62 and the second collar 63, the number of connection points between the connection structure 60 and the first connecting pipe 31 and the second connecting pipe 32 is increased, so that the connection stability between the connection structure 60 and the first connecting pipe 31 and the second connecting pipe 32 is improved, so that the connection between the connection structure 60 and the first connecting pipe 31 and the second connecting pipe 32 is not prone to failure.

[0222] Please refer to Figure 15 and Figure 18 , Figure 18 is a schematic view of another perspective of the assembly structure of Figure 15 . In some embodiments, the connecting rib 61 comprises a first portion 610 and a second portion 611 connected at an angle with the first portion 610, the first portion 610 being connected with the first collar 62, and the second portion 611 being connected with the second collar 63.

[0223] Specifically, the angle between the first portion 610 and the second portion 611 can be an acute angle, a right angle or an obtuse angle. For example, the angle between the first portion 610 and the second portion 611 is a right angle, and the first portion 610 and the second portion 611 can form an "L" shaped structure. The first portion 610 and the second portion 611 can be manufactured respectively and then connected by means of bonding, welding or the like. In this way, the overall manufacturing cost of the connecting rib 61 is relatively low. The first portion 610 and the second portion 611 can also be integrally formed. In this way, the integrally formed connecting rib 61 reduces the possible weak points of connecting the portions, and thus the structural strength of the connecting rib 61 is relatively high, so that the connecting rib 61 is not prone to breakage during use.

[0224] Thus, since the first portion 610 and the second portion 611 are connected at an angle, the connecting rib 61 can be suitable for the first connecting pipe 31 and the second connecting pipe 32 with different center distances, so that the commonality of the connecting structure 60 can be improved.

[0225] Please refer to Figure 16 , Figure 17 , Figure 19 and Figure 20 , Figure 19 is a schematic view of another perspective of the assembly structure of Figure 16 ; Figure 20 is a schematic view of another perspective of the assembly structure of Figure 17 . In some embodiments, the connecting rib 61 comprises a first connecting segment 612, a second connecting segment 613 and a third connecting segment 614, the first connecting segment 612 being connected with the first collar 62, the second connecting segment 613 being connected with the second collar 63, and the third connecting segment 614 being an annular structure with two open ends, the first connecting segment 612 and the second connecting segment 613 being connected on opposite sides of the third connecting segment 614.

[0226] Specifically, the ring structure can be a circular ring, an elliptical ring, or other suitable shapes. The first connecting segment 612, the second connecting segment 613, and the third connecting segment 614 can be manufactured separately and then connected by bonding, welding, or the like. In this way, the overall manufacturing cost of the connecting rib 61 is lower. The first connecting segment 612, the second connecting segment 613, and the third connecting segment 614 can also be integrally formed. In this way, the integrally formed connecting rib 61 reduces the possible weak points of connecting the parts, and thus the structural strength of the connecting rib 61 is higher, so that the connecting rib 61 is less likely to break during use.

[0227] In this way, the third connecting segment 614 of the ring structure can more evenly disperse the stress on the connecting rib 61, reducing local stress concentration, thereby improving the overall stability of the connecting rib 61, and further improving the reliability of the connection between the first connecting pipe 31 and the second connecting pipe 32. At the same time, the third connecting segment 614 can also absorb manufacturing tolerances, thereby reducing the probability of deformation or skewing of the first connecting pipe 31 and the second connecting pipe 32.

[0228] Please refer to Figure 16 and Figure 19 In some embodiments, the third connecting segment 614 has a through hole 6140, and the extension direction m of the through hole 6140 is parallel to the length direction of the first connecting pipe 31.

[0229] Specifically, the shape of the through hole 6140 can be circular, elliptical, or other suitable shapes. By providing the through hole 6140, the third connecting segment 614 is easy to deform, and even if there are manufacturing tolerances of the first connecting pipe 31 and the second connecting pipe 32, it can be compensated by the deformation of the third connecting segment 614.

[0230] In this way, the third connecting segment 614 can absorb the manufacturing tolerances of the first connecting pipe 31 and the second connecting pipe 32 along the length direction of the first connecting pipe 31, thereby reducing the probability of deformation or skewing of the first connecting pipe 31 and the second connecting pipe 32.

[0231] Please refer to Figure 17 , Figure 20 , Figure 21 and Figure 22 , Figure 21 is a schematic diagram of the assembly structure of the connecting structure 60, the first connecting pipe 31, and the second connecting pipe 32 provided by some embodiments of the present application; Figure 22 is Figure 21 a schematic diagram of another view of the assembly structure of the connecting structure 60. In some embodiments, the third connecting segment 614 has a through hole 6140, and the extension direction m of the through hole 6140 is perpendicular to the length direction of the first connecting pipe 31.

[0232] Thus, the third connection section 614 can absorb the manufacturing tolerance of the first connection pipe 31 and the second connection pipe 32 in the direction perpendicular to the length direction of the first connection pipe 31, thereby reducing the probability of the first connection pipe 31 and the second connection pipe 32 being deformed or skewed as a group.

[0233] Referring to Figure 17 and Figure 20 In some embodiments, the axial dimension of the third connection section 614 is greater than the axial dimension of the first collar 62.

[0234] Thus, the third connection section 614 can swing along the extension direction m of the through hole 6140, thereby absorbing the manufacturing tolerance of the first connection pipe 31 and the second connection pipe 32 in the extension direction m of the through hole 6140, thereby reducing the probability of the first connection pipe 31 and the second connection pipe 32 being deformed or skewed as a group.

[0235] Referring to Figure 21 and Figure 22 In some embodiments, the axial dimension of the third connection section 614 is less than or equal to the axial dimension of the first collar 62.

[0236] Thus, the third connection section 614 can swing along the radial direction n of the through hole 6140, thereby absorbing the manufacturing tolerance of the first connection pipe 31 and the second connection pipe 32 in the radial direction n of the through hole 6140, thereby reducing the probability of the first connection pipe 31 and the second connection pipe 32 being deformed or skewed as a group.

[0237] Referring to Figure 23 , Figure 23 is a partial structure schematic diagram of a battery device 100 provided in some embodiments of the present application. In some embodiments, the battery device 100 includes a plurality of columns of battery monomers 10 arranged in a third direction y, and a heat exchange main body 103 extending in the third direction y and connected with a first wall 11 of each battery monomer 10, the first wall 11 being the wall with the largest surface area in the battery monomer 10.

[0238] Specifically, the number of columns of battery monomers 10 can be two, three, four, or even more. The plurality of battery monomers 10 can be arranged in the direction of the length, height, or width of one of the battery monomers 10. For example, the plurality of battery monomers 10 can be arranged in the length direction of one of the battery monomers 10. At this time, the third direction y is the same as the length direction of the battery monomer 10 described above. For another example, the plurality of battery monomers 10 can be arranged in the width direction of one of the battery monomers 10. At this time, the third direction y is the same as the width direction of the battery monomer 10 described above.

[0239] The battery cell 10 can include a plurality of walls, and a first wall 11 having the largest surface area among the battery cell 10 is connected to the heat exchange main body 103. That is, the first wall 11 of the battery cell 10 faces the heat exchange main body 103, or in other words, the first wall 11 of the battery cell 10 is parallel to the third direction y. The outer surface of the first wall 11 can be attached to the outer surface of the heat exchange main body 103. The outer surface of the first wall 11 can be attached to the heat exchange main body 103, so as to improve the heat exchange effect of the battery cell 10.

[0240] Thus, since the heat exchange main body 103 is connected to the first wall 11 having the largest surface area among the battery cell 10, the heat exchange main body 103 can more effectively regulate the temperature of the battery cell 10.

[0241] Referring to Figure 23 In some embodiments, the battery cell 10 includes two second walls 12 arranged opposite to each other in the third direction y, and the second walls 12 of adjacent battery cells 10 are arranged in alignment in the third direction y.

[0242] Specifically, the second walls 12 of adjacent battery cells 10 can be spaced apart or connected to each other.

[0243] Thus, the battery cells 10 can be closely arranged together, and such an arrangement can more effectively utilize the space inside the battery device 100, thereby improving the space utilization of the battery device 100.

[0244] Referring to Figure 5 In some embodiments, the heat exchange main body 103 and the battery cell 10 are alternately arranged in the second direction x, and the second direction x intersects the third direction y.

[0245] Specifically, along the second direction x, the battery cell 10 and the heat exchange main body 103 can be alternately arranged in the manner of heat exchange main body 103, a row of battery cells 10, heat exchange main body 103, or in the manner of a row of battery cells 10, heat exchange main body 103, a row of battery cells 10.

[0246] Thus, the plurality of rows of battery cells 10 and the plurality of heat exchange main bodies 103 are connected to each other to form a whole, which is accommodated in the box body 101, so as to effectively manage the heat of each row of battery cells 10 and ensure the structural strength of the battery device 100 as a whole, thereby improving the performance of the battery device 100.

[0247] In some embodiments, the heat exchange main body 103 is bonded to the first wall 11.

[0248] Specifically, the bonding refers to using an adhesive to fixedly connect the heat exchange body 103 and the first wall 11 of the battery cell 10. The bonding can use a heat-curing glue, a structural glue, or other types of adhesives, which can be adaptively set according to the working temperature, pressure, and environmental conditions of the battery device 100.

[0249] In this way, the bonding connection provides a firm fixing manner, enhances the structural stability between the heat exchange body 103 and the first wall 11 of the battery cell 10, and reduces displacement or damage caused by vibration or impact during the operation of the battery device 100. This enables the heat exchange body 103 to continuously conform to the first wall 11 to continuously adjust the temperature of the battery cell 10.

[0250] In some embodiments, the bottom wall of the box body 101 is connected to the battery cell 10, and the side wall of the box body 101 is spaced apart from the battery cell 10. The minimum distance between the side wall of the box body 101 and the battery cell 10 is in the range of [5mm, 35mm].

[0251] Specifically, the battery cell 10 can be connected to the bottom wall of the box body 101 by bolt connection, welding, bonding, or the like. The minimum distance between the side wall of the box body 101 and the battery cell 10 can be in the range of [5mm, 30mm], [10mm, 25mm], [15mm, 35mm], [30mm, 35mm], or the like. The minimum distance between the side wall of the box body 101 and the battery cell 10 can be 5mm, 10mm, 15mm, 20mm, 35mm, or the like.

[0252] Since the space occupation of the heat exchange assembly 102 in the box body 101 is reduced, the volume of the battery cell 10 can be set larger. Within the above numerical range, the battery cell 10 not only is not prone to friction with the side wall of the box body 101, but also can have a larger volume, thereby being able to obtain a higher energy density.

[0253] In one specific embodiment, the battery device 100 includes a box body 101, a battery cell 10, and a heat exchange assembly 102. The battery cell 10 is arranged in the box body 101. The heat exchange assembly 102 is configured to exchange heat with the battery cell 10.

[0254] The bottom wall of the box body 101 is connected to the battery cell 10. The side wall of the box body 101 is spaced apart from the battery cell 10. The minimum distance between the side wall of the box body 101 and the battery cell 10 is 5mm. Please refer to Figure 7 The box body 101 has an interface 1012. The interface 1012 is arranged on one of the side walls of the box body 101.

[0255] Please refer to Figure 23The number of the battery monomers 10 is multiple columns. The multiple columns of the battery monomers 10 are arranged along the third direction y. The battery monomer 10 comprises two second walls 12 oppositely arranged along the third direction y. The second walls 12 of two adjacent battery monomers 10 are arranged in alignment along the third direction y.

[0256] The heat exchange main body 103 extends along the third direction y and is bonded to the first wall 11 of each battery monomer 10. The first wall 11 is the wall with the largest surface area in the battery monomer 10.

[0257] Please refer to Figure 5 The heat exchange assembly 102 comprises the multiple heat exchange main bodies 103, the connecting pieces 30 and the joints 104. The multiple heat exchange main bodies 103 are in contact with the battery monomers 10. The heat exchange main bodies 103 and the battery monomers 10 are alternately arranged along the second direction x. The second direction x intersects the third direction y.

[0258] Please refer to Figure 7 and Figure 10 The heat exchange main body 103 comprises the heat exchange piece 105 and the current collector 20. The heat exchange piece 105 has a medium flow channel 21 inside. The heat exchange piece 105 is arranged between two adjacent battery monomers 10. The current collector 20 is connected to at least one end of the heat exchange piece 105. The current collector 20 is in communication with the medium flow channel 21. The two side walls of the current collector 20 opposite to each other are connected with the connecting pieces 30. Two adjacent current collectors 20 are connected by the connecting pieces 30.

[0259] The connecting pieces 30 connect multiple current collectors 20. The joints 104 connect the interfaces 1012 and the current collectors 20. The joints 104 are located on one side of the length direction of the box body 101. The number of the joints 104 is multiple. The multiple joints 104 are located on the same side of the box body 101.

[0260] Please refer to Figure 8 The joint 104 comprises the first connecting part 106, the second connecting part 107 and the third connecting part 108. One end of the first connecting part 106 is connected to one end of the current collector 20 away from the heat exchange piece 105. The other end of the first connecting part 106 is connected to the interface 1012. One end of the second connecting part 107 is connected to one of the two side walls of the current collector 20 opposite to each other. The other end of the second connecting part 107 is connected to the connecting piece 30 located on one side of the current collector 20. One end of the third connecting part 108 is connected to the other of the two side walls of the current collector 20 opposite to each other. The other end of the third connecting part 108 is connected to the connecting piece 30 located on the other side of the current collector 20.

[0261] Please refer to Figure 10The number of the connectors 104 is two. One of the connectors 104 is the water inlet connector 40. The other connector 104 is the water outlet connector 50. The water inlet connector 40 and the water outlet connector 50 are arranged on the same current collector 20. The water inlet connector 40 and the water outlet connector 50 are spaced apart along the first direction z. Along the first direction z, the central axis of the water inlet connector 40 and the central axis of the water outlet connector 50 overlap with each other.

[0262] Please refer to Figure 8 The current collector 20 includes a first side 22 and a second side 23 connected to the first side 22. The second side 23 has a larger surface area than the first side 22. The connecting member 30 is connected to the second side 23. The water inlet connector 40 and the water outlet connector 50 are both connected to the first side 22.

[0263] Please refer to Figure 14 The connecting member 30 includes a first connecting pipe 31 and a second connecting pipe 32. The first connecting pipe 31 and the second connecting pipe 32 are arranged on the same side of the battery cell 10. The first connecting pipe 31 and the second connecting pipe 32 are both in communication with the medium flow channel 21. The first connecting pipe 31 is in communication with the water inlet connector 40. The second connecting pipe 32 is in communication with the water outlet connector 50. Along the first direction z, the central axis of the first connecting pipe 31 and the central axis of the second connecting pipe 32 overlap with each other.

[0264] Please refer to Figure 10 The second connecting portion 107 and the third connecting portion 108 of the water inlet connector 40 are formed with a first main flow channel 310. The first connecting pipe 31 has the first main flow channel 310. The current collector 20 has a first sub-flow channel 24 and a second sub-flow channel 25. The first sub-flow channel 24 is in communication with the first main flow channel 310 and the medium flow channel 21. The second sub-flow channel 25 is in communication with the first main flow channel 310 and the water inlet connector 40.

[0265] The second connecting portion 107 and the third connecting portion 108 of the water outlet connector 50 are formed with a second main flow channel 320, which is in communication with the second connecting pipe 32. The second connecting pipe 32 has the second main flow channel 320. The current collector 20 further has a third sub-flow channel 26 and a fourth sub-flow channel 27. The third sub-flow channel 26 is in communication with the second main flow channel 320 and the medium flow channel 21. The fourth sub-flow channel 27 is in communication with the second main flow channel 320 and the water outlet connector 50.

[0266] The medium flow channel 21 includes a plurality of first chambers 210 and a plurality of second chambers 211. The current collector 20 further includes a first current collector 28 and a second current collector 29. The first current collector 28 is in communication with the first sub-flow channel 24 and the first chamber 210. The second current collector 29 is in communication with the third sub-flow channel 26 and the second chamber 211.

[0267] Please refer to Figure 14The battery device 100 further comprises a connecting structure 60. One end of the connecting structure 60 is connected to the first connecting pipe 31. The other end of the connecting structure 60 is connected to the second connecting pipe 32. The number of the connecting structure 60 is plural. The plural connecting structures 60 are arranged at intervals along a second direction x. The second direction x intersects the first direction z. Each of the connecting structures 60 is arranged between two adjacent current collectors 20.

[0268] The connecting structure 60 further comprises a connecting rib 61, a first collar 62 and a second collar 63. The first collar 62 is sleeved on the first connecting pipe 31. The second collar 63 is sleeved on the second connecting pipe 32. The connecting rib 61 connects the first collar 62 and the second collar 63.

[0269] Please refer to Figure 16 The connecting rib 61 comprises a first connecting section 612, a second connecting section 613 and a third connecting section 614. The first connecting section 612 is connected to the first collar 62. The second connecting section 613 is connected to the second collar 63. The first connecting section 612 and the second connecting section 613 are connected to two opposite sides of the third connecting section 614. The third connecting section 614 is a ring structure with two open ends. The third connecting section 614 has a via hole 6140, and the extension direction m of the via hole 6140 is parallel to the length direction of the first connecting pipe 31.

[0270] Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present application, and not to limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacement to part or all of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present application, and they should be covered in the scope of the claims and the description of the present application. Especially, as long as there is no structural conflict, each technical feature mentioned in each embodiment can be combined in any way. The present application is not limited to the specific embodiments disclosed in the text, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure has interfaces; The battery cell is housed inside the casing; A heat exchange assembly configured to exchange heat with the individual battery cells; wherein the heat exchange assembly includes: Multiple heat exchange elements are in contact with the battery cell; Connecting components, connecting the plurality of heat exchange bodies; A connector connects the interface and the heat exchange body, or connects the interface and the connector; wherein the connector is located on one side of the housing.

2. The battery device according to claim 1, characterized in that, The number of connectors is multiple, and the multiple connectors are located on the same side of the housing.

3. The battery device according to claim 1, characterized in that, The connector is located on one side of the length direction of the housing.

4. The battery device according to claim 1, characterized in that, The heat exchange body includes a heat exchange element and a current collector. The heat exchange element has a medium flow channel inside. The heat exchange element is disposed between adjacent battery cells. The current collector is connected to at least one end of the heat exchange element and communicates with the medium flow channel. The two opposite sidewalls of the current collector are connected to the connecting member. Two adjacent current collectors are connected through the connecting member.

5. The battery device according to claim 4, characterized in that, The connector includes a first connecting part, a second connecting part, and a third connecting part. One end of the first connecting part is connected to the interface, and the second connecting part and the third connecting part are connected to two connectors that connect two adjacent current collectors.

6. The battery device according to claim 4, characterized in that, The connector includes a first connecting part, a second connecting part, and a third connecting part. One end of the first connecting part is connected to the end of the current collector away from the heat exchanger, and the other end of the first connecting part is connected to the interface. One end of the second connecting part is connected to one of the two side walls opposite to the current collector, and the other end of the second connecting part is connected to a connector located on one side of the current collector. One end of the third connecting part is connected to the other of the two side walls opposite to the current collector, and the other end of the third connecting part is connected to a connector located on the other side of the current collector.

7. The battery device according to claim 6, characterized in that, The number of connectors is two, one of which is a water inlet connector and the other is a water outlet connector. The water inlet connector and the water outlet connector are arranged on the same collector.

8. The battery device according to claim 7, characterized in that, The inlet connector and the outlet connector are spaced apart along the first direction.

9. The battery device according to claim 8, characterized in that, Along the first direction, the central axis of the water inlet connector overlaps with the central axis of the water outlet connector.

10. The battery device according to claim 8 or 9, characterized in that, The first connecting part of the water inlet connector includes a first section and a second section, the first section and the second section are connected at an angle, and the first section is connected to the collector; the first connecting part of the water outlet connector includes a third section and a fourth section, the third section and the fourth section are connected at an angle, and the third section is in communication with the collector; wherein, the first section and the second section are parallel to each other, and the third section and the fourth section are parallel to each other.

11. The battery device according to claim 6, characterized in that, The number of connectors is two, one of which is a water inlet connector and the other is a water outlet connector. The water inlet connector and the water outlet connector are respectively installed on two adjacent water collectors.

12. The battery device according to claim 7 or 11, characterized in that, The collector includes a first side and a second side connected to the first side. The surface area of ​​the second side is larger than that of the first side. The connector is connected to the second side. The inlet connector and the outlet connector are both connected to the first side.

13. The battery device according to claim 7 or 11, characterized in that, The connector includes a first connecting pipe and a second connecting pipe, which are disposed on the same side of the battery cell. Both the first connecting pipe and the second connecting pipe are connected to the medium flow channel. The first connecting pipe is connected to the water inlet connector, and the second connecting pipe is connected to the water outlet connector. The first connecting pipe and the second connecting pipe are spaced apart along a first direction.

14. The battery device according to claim 13, characterized in that, The second connecting portion and the third connecting portion of the water inlet connector form a first main channel, which is connected to the first connecting pipe. The collector has a first branch channel and a second branch channel. The first branch channel is connected to the first main channel and the medium channel, and the second branch channel is connected to the first main channel and the water inlet connector. The second connecting part and the third connecting part of the water outlet connector form a second main channel, which is connected to the second connecting pipe. The collector also has a third branch channel and a fourth branch channel. The third branch channel is connected to the second main channel and the medium channel, and the fourth branch channel is connected to the second main channel and the water outlet connector.

15. The battery device according to claim 14, characterized in that, The medium flow channel includes multiple first chambers and multiple second chambers. The current collector also includes a first current collector and a second current collector. The first current collector connects the first branch channel and the first chamber, and the second current collector connects the third branch channel and the second chamber.

16. The battery device according to any one of claims 13-15, characterized in that, Along the first direction, the central axis of the first connecting pipe overlaps with the central axis of the second connecting pipe.

17. The battery device according to any one of claims 13-16, characterized in that, The battery device further includes a connection structure, one end of which is connected to the first connection tube, and the other end of which is connected to the second connection tube.

18. The battery device according to claim 17, characterized in that, The number of connection structures is multiple, and the multiple connection structures are spaced apart along the second direction, which intersects with the first direction.

19. The battery device according to claim 18, characterized in that, Each of the connection structures is disposed between two adjacent current collectors.

20. The battery device according to any one of claims 17-19, characterized in that, The connecting structure further includes a connecting rib, a first collar and a second collar, the first collar being sleeved on the first connecting pipe and the second collar being sleeved on the second connecting pipe, and the connecting rib connecting the first collar and the second collar.

21. The battery device according to claim 20, characterized in that, The connecting rib includes a first part and a second part that is connected at an angle to the first part. The first part is connected to the first collar, and the second part is connected to the second collar.

22. The battery device according to claim 20, characterized in that, The connecting rib includes a first connecting segment, a second connecting segment, and a third connecting segment. The first connecting segment is connected to the first collar, the second connecting segment is connected to the second collar, and the third connecting segment is a ring structure with open ends. The first connecting segment and the second connecting segment are connected to opposite sides of the third connecting segment.

23. The battery device according to claim 22, characterized in that, The third connecting section has a through hole, and the extension direction of the through hole is parallel to the length direction of the first connecting pipe.

24. The battery device according to claim 22, characterized in that, The third connecting section has a through hole, and the extension direction of the through hole is perpendicular to the length direction of the first connecting pipe.

25. The battery device according to claim 24, characterized in that, The axial dimension of the third connecting segment is greater than the axial dimension of the first collar.

26. The battery device according to claim 24, characterized in that, The axial dimension of the third connecting segment is less than or equal to the axial dimension of the first collar.

27. The battery device according to any one of claims 1-26, characterized in that, The battery device includes multiple rows of battery cells arranged along a third direction, and the heat exchange body extends along the third direction and is connected to a first wall of each battery cell, wherein the first wall is the wall with the largest surface area among the battery cells.

28. The battery device according to claim 27, characterized in that, The battery cell includes two second walls disposed opposite each other in the third direction, and the second walls of two adjacent battery cells are aligned in the third direction.

29. The battery device according to claim 27 or 28, characterized in that, The heat exchanger body and the battery cell are alternately arranged in a second direction, which intersects with the third direction.

30. The battery device according to any one of claims 27-29, characterized in that, The heat exchanger body is bonded to the first wall.

31. The battery device according to claim 1, characterized in that, The bottom wall of the housing is connected to the battery cell, and the side wall of the housing is spaced apart from the battery cell. The minimum distance between the side wall of the housing and the battery cell is [5mm, 35mm].

32. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-31 is used to provide electrical energy.

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