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 plurality of battery monomers and a heat exchange assembly, the box body is provided with a connector communicated with the outside. And the plurality of single batteries are arranged in the box body. The heat exchange assembly is arranged in the box body, and the heat exchange assembly is configured to perform heat exchange with the battery monomers. The heat exchange assembly comprises a heat exchange body, a current collector, a connecting piece and a connector. A medium flow channel is formed in the heat exchange main body, and the heat exchange main body is arranged between the adjacent single batteries. The current collector is connected with at least one end of the heat exchange body and communicates with the medium flow channel. The connecting piece is connected with the plurality of current collectors. At least one connector is arranged and connected with the connecting piece, the heat exchange body and the connector. Therefore, the structure of the heat exchange assembly is simplified, the space occupation of the heat exchange assembly is reduced, the space utilization rate in the battery device is improved, and the battery device can accommodate a battery monomer with a larger volume, so that 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 cell is crucial to ensure the battery performance, prolong the battery cell life and guarantee the use safety. In the related art, the battery cell is temperature-regulated by using a heat exchange assembly, so that the battery cell works in a suitable temperature range.

[0003] The heat exchange assembly includes a heat exchange main body and a joint. The heat exchange main body is used for heat exchange with the battery cell. The joint is used for charging the fluid into the heat exchange main body and discharging the fluid in the heat exchange main body. In the case of multiple battery cells, in order to ensure the efficiency of temperature regulation, the heat exchange main body needs to be arranged at multiple positions. In the related art, one joint is arranged corresponding to each heat exchange main body. This results in that the heat exchange assembly occupies a large space inside the battery device, thereby reducing the space utilization rate of the battery device, and reducing the energy density of the battery device under the same volume. CONTENT OF THE UTILITY MODEL

[0004] The present application provides a battery device and a power utilization device, which can solve the problem of low space utilization rate of the battery device, thereby reducing the energy density of the battery device under the same volume.

[0005] The battery device provided by the embodiment of the present application includes a box body, a plurality of battery cells and a heat exchange assembly. The box body is provided with an interface in communication with the outside. The plurality of battery cells are arranged in the box body. The heat exchange assembly is arranged in the box body and is configured to exchange heat with the battery cells. The heat exchange assembly includes a heat exchange main body, a current collector, a connecting piece and a joint. The heat exchange main body has a medium flow channel inside, and the heat exchange main body is arranged between adjacent battery cells. The current collector is connected to at least one end of the heat exchange main body, and the current collector is in communication with the medium flow channel. The connecting piece connects a plurality of current collectors. The joint is configured as at least one, and the joint connects the connecting piece, the heat exchange main body and the interface.

[0006] In the battery device of the embodiments of the present application, the joint is arranged to connect the connecting member, the heat exchange main body and the interface, and the joint can be used to charge fluid into the plurality of heat exchange main bodies or discharge fluid from the plurality of heat exchange main bodies. The plurality of heat exchange main bodies are connected to the at least one joint through the fluid collector and the connecting member, and the medium channels in the plurality of heat exchange main bodies are connected to each other, which simplifies the structure of the heat exchange assembly, reduces the space occupation of the heat exchange assembly, improves the space utilization in the battery device, and enables the battery device to accommodate a larger volume of battery cells, thereby achieving a higher energy density under the condition of the same volume.

[0007] In some embodiments, the battery cell comprises a first wall and a second wall, the first wall is connected to the second wall at an angle, and the first wall is connected to the heat exchange main body.

[0008] In this way, by arranging the heat exchange main body between adjacent battery cells and connecting the first wall to the heat exchange main body, the contact area between the heat exchange main body and the battery cell can be increased, thereby improving the heat exchange efficiency.

[0009] In some embodiments, the first wall is the wall with the largest surface area in the battery cell.

[0010] In this way, by connecting the heat exchange main body to the first wall with the largest surface area in the battery cell, the heat exchange area between the heat exchange main body and the battery cell can be significantly increased, thereby improving the heat exchange efficiency.

[0011] In some embodiments, a plurality of battery cells are arranged along a first direction, and in the first direction, the second walls of two adjacent battery cells are arranged in alignment.

[0012] In this way, the battery cells can be closely arranged together, and this layout can more effectively utilize the space inside the battery device and improve the space utilization of the battery device.

[0013] In some embodiments, the heat exchange main body and the battery cell are arranged alternately in a second direction, and the second direction intersects the first direction.

[0014] In this way, the plurality of columns of battery cells and the plurality of heat exchange main bodies are connected to form a whole and are accommodated in the box, which can effectively manage the heat of each column of battery cells and ensure the structural strength of the whole battery device, thereby improving the performance of the battery device.

[0015] In some embodiments, the heat exchange main body is bonded to the first wall.

[0016] Thus, the adhesive connection provides a firm fixing mode, enhances the structural stability between the heat exchange main body and the first wall of the battery cell, and reduces displacement or damage caused by vibration or impact during operation of the battery device. This enables the heat exchange main body to continuously adhere to the first wall to continuously adjust the temperature of the battery cell.

[0017] In some embodiments, the box body comprises a side beam, which is arranged near one end of the length direction of the heat exchange main body, and the interface is arranged on the side beam.

[0018] Thus, in actual use, one end of the length direction of the box body is close to other equipment outside the battery device. Therefore, the position of the side beam facilitates the connection of the joint to other equipment outside the battery device through the interface.

[0019] In some embodiments, the joint comprises a joint body, a first connecting part, a second connecting part and a third connecting part, the first connecting part is connected to one end of the joint body away from the heat exchange main body, the first connecting part is connected to the interface, the second connecting part is connected to one of the two side walls opposite to the joint body, the third connecting part is connected to the other of the two side walls opposite to the joint body, the second connecting part is connected to the connecting piece on one side of the joint body, and the third connecting part is connected to the connecting piece on the other side of the joint body.

[0020] Thus, by arranging the joint body, the first connecting part, the second connecting part and the third connecting part, the heat exchange medium can directly enter the heat exchange main body connected to the joint body, or enter other heat exchange main bodies through the connecting piece, thereby improving the heat exchange efficiency. Moreover, since the second connecting part and the third connecting part are respectively located on the two sides of the joint body and connected to the corresponding connecting pieces, the design of the joint is compact, thereby reducing the space occupation of the joint.

[0021] In some embodiments, the first connecting part comprises a water inlet joint and a water outlet joint, and the water inlet joint and the water outlet joint are arranged on the same joint body.

[0022] Thus, arranging the water inlet joint and the water outlet joint on the same joint body 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 battery cells, thereby achieving higher energy density under the condition of the same volume.

[0023] In some embodiments, the current collector is connected to the first end of one part of the heat exchange main body, and the water inlet joint and the water outlet joint are both connected to the first end of another part of the heat exchange main body.

[0024] In this way, the current collector, the water inlet connector and the water outlet connector are all connected to the same end of the entire heat exchange main body, which reduces the connection points between the parts of the heat exchange assembly, so that the structure of the heat exchange assembly is more compact and integrated, thereby improving the space utilization in the battery device and allowing the battery device to accommodate larger volume battery monomers, thereby achieving higher energy density under the condition of the same volume.

[0025] In some embodiments, the current collector is connected to the first end of one part of the heat exchange main body, the water inlet connector is connected to the first end of another part of the heat exchange main body, and the water outlet connector is connected to the second end of another part of the heat exchange main body.

[0026] In this way, the current collector is arranged at the same end of the heat exchange main body, which facilitates the arrangement of the connecting member. If the pipes for connecting the water inlet connector and the water outlet connector are arranged on the same side, a large space will be occupied, which is difficult to adapt to some space-compact use scenarios. By arranging the water inlet connector and the water outlet connector at different ends of the heat exchange main body, the occupation of the pipes for connecting the water inlet connector and the water outlet connector on one side can be reduced, thereby meeting the space arrangement requirements of the external pipes.

[0027] In some embodiments, the first end of the heat exchange main body and the second end of the heat exchange main body are both connected to the current collector, and the water inlet connector and the water outlet connector are both connected to the first end of the heat exchange main body.

[0028] In this way, this design allows the fluid to be more evenly distributed to each heat exchange main body, optimizes the flow path of the fluid, and thus improves the heat exchange efficiency.

[0029] In some embodiments, the first end of one part of the heat exchange main body and the second end of one part of the heat exchange main body are both connected to the current collector, the water inlet connector is connected to the first end of another part of the heat exchange main body, and the water outlet connector is connected to the second end of another part of the heat exchange main body.

[0030] In this way, this design allows the fluid to be more evenly distributed to each heat exchange main body, optimizes the flow path of the fluid, and thus improves the heat exchange efficiency. Moreover, by arranging the water inlet connector and the water outlet connector at different ends of the heat exchange main body, the occupation of the pipes for connecting the water inlet connector and the water outlet connector on one side can be reduced, thereby meeting the space arrangement requirements of the external pipes.

[0031] In some embodiments, the water inlet connector and the water outlet connector are arranged at intervals along the third direction.

[0032] In this way, by arranging the water inlet joint and the water outlet joint apart along the third direction, the water inlet joint and the water outlet joint occupy less space in other directions, so that the overall space occupied by the water inlet joint and the water outlet joint can be reduced.

[0033] In some embodiments, along the third direction, the central axis of the water inlet joint and the central axis of the water outlet joint overlap with each other.

[0034] In this way, in the third direction, the projections of the water inlet joint and the water outlet joint overlap, so that the overall space occupied by the water inlet joint and the water outlet joint can be further reduced.

[0035] In some embodiments, the water inlet joint comprises a first section and a second section, the first section and the second section are connected at an angle, the first section is connected to the joint body; the water outlet joint comprises a third section and a fourth section, the third section and the fourth section are connected at an angle, the third section is in communication with the joint body; 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.

[0036] In this way, since the first section and the second section of the water inlet joint and the third section and the fourth section of the water outlet joint are parallel to each other, this arrangement helps to make more efficient use of space, thereby improving the space utilization of the battery device.

[0037] In some embodiments, the first connecting part comprises a water inlet joint and a water outlet joint, the water inlet joint and the water outlet joint are arranged on two adjacent joint bodies respectively.

[0038] In this way, arranging the water inlet joint and the water outlet joint on two adjacent joint bodies can reduce the overall space occupied by the water inlet joint and the water outlet joint. Moreover, arranging the joints on different joint bodies can facilitate the layout of the water inlet joint and the water outlet joint, thereby facilitating the manufacture of the water inlet joint and the water outlet joint and reducing manufacturing complexity.

[0039] In some embodiments, the joint body comprises a first side and a second side connected to the first side, the surface area of the second side is greater than the surface area of the first side, the connecting piece is connected to the second side, and the water inlet joint and the water outlet joint are both connected to the first side.

[0040] In this way, the connecting piece is connected to 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 main body, thereby improving the heat exchange efficiency of the heat exchange main body. The water inlet joint and the water outlet joint are both connected to the first side with a smaller surface area, which reduces the space occupied by the water inlet joint and the water outlet joint on the heat exchange main body, thereby improving the space utilization of the battery device.

[0041] In some embodiments, the connecting member comprises a first connecting pipe and a second connecting pipe, both of which are in communication with the medium flow channel, the first connecting pipe is in communication with the water inlet joint, and the second connecting pipe is in communication with the water outlet joint.

[0042] In this way, the heat exchange medium can be supplemented into the medium flow channel through the first connecting pipe. The heat exchange medium in the medium flow channel can flow out of the medium flow channel through the second connecting pipe. This enables the heat exchange medium to circulate, thereby improving the heat exchange efficiency.

[0043] In some embodiments, the joint body has a first main flow channel in communication with the first connecting pipe, and further has a first branch flow channel and a second branch flow channel, the first branch flow channel being in communication with the first main flow channel and the medium flow channel, and the second branch flow channel being in communication with the first main flow channel and the water inlet joint.

[0044] The joint body further has a second main flow channel in communication with the second connecting pipe, and further has a third branch flow channel and a fourth branch flow channel, the third branch flow channel being in communication with the second main flow channel and the medium flow channel, and the fourth branch flow channel being in communication with the second main flow channel and the water outlet joint.

[0045] In this way, the main flow channel can be used to transport the heat exchange medium to flow to the area where each collector is located through the connecting pipe. The branch flow channel can enable the heat exchange medium to flow into the medium flow channel of the heat exchange body. 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 to ensure the reliability of the heat exchange assembly.

[0046] In some embodiments, the medium flow channel comprises a plurality of first chambers and a plurality of second chambers, and the joint body further comprises a first collector and a second collector, the first collector being in communication with the first branch flow channel and the first chamber, and the second collector being in communication with the third branch flow channel and the second chamber.

[0047] In this way, the collector can have a branch flow function, which can reduce the probability of vortex dead zone of the heat exchange medium flowing into the medium flow channel, reduce the 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 flow uniformly through each chamber, and improve the uniformity of heat exchange.

[0048] In some embodiments, the connecting member comprises a first connecting pipe and a second connecting pipe, both of which are in communication with the medium flow channel, 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 a third direction.

[0049] 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 with a spacing, the space occupied by the connecting piece in the battery device is small, which improves the space utilization in the battery device, thereby improving the energy density of the battery device under the same volume.

[0050] In some embodiments, along the third direction, the central axis of the first connecting pipe and the central axis of the second connecting pipe overlap each other.

[0051] Thus, in the third direction, the projections of the first connecting pipe and the second connecting pipe overlap, so that the space occupied by the first connecting pipe and the second connecting pipe as a whole can be further reduced.

[0052] 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.

[0053] Thus, 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 misplacement 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 it is not necessary to assemble the first connecting pipe and the second connecting pipe respectively, thereby improving the assembly efficiency.

[0054] In some embodiments, the number of connecting structures is multiple, and the multiple connecting structures are arranged in the second direction with a spacing.

[0055] Thus, the multiple connecting structures can further enhance the stability of the first connecting pipe and the second connecting pipe as a whole. And even if one of the connecting structures fails, the first connecting pipe and the second connecting pipe can still form a stable connection through other connecting structures.

[0056] In some embodiments, each of the connecting structures is arranged between two adjacent heat exchange assemblies.

[0057] Thus, arranging the connecting structure between the current collectors can optimize the space layout inside the battery device, reduce the space occupied by the connecting structure inside the battery device, and improve the space utilization.

[0058] In some embodiments, the connecting structure 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.

[0059] Therefore, by arranging the first grommet and the second grommet, the connection points between the connection structure and the first connecting pipe and the second connecting pipe are increased, so that the connection stability between the connection structure and the first connecting pipe and the second connecting pipe is improved, and the connection failure between the connection structure and the first connecting pipe and the second connecting pipe is avoided.

[0060] In some embodiments, the connecting rib comprises a first part and a second part connected at an angle with the first part, the first part is connected with the first grommet, and the second part is connected with the second grommet.

[0061] Therefore, 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, so that the commonality of the connection structure can be improved.

[0062] 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 grommet, the second connecting section is connected with the second grommet, the third connecting section is a ring structure with two open ends, and the first connecting section and the second connecting section are connected on opposite sides of the third connecting section.

[0063] Therefore, the third connecting section of the ring structure can more evenly disperse the stress on the connecting rib, reduce local stress concentration, improve the overall stability of the connecting rib, and further improve 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 the manufacturing tolerance, so as to reduce the probability of deformation or skew of the first connecting pipe and the second connecting pipe.

[0064] 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.

[0065] Therefore, the third connecting section can absorb the manufacturing tolerance of the first connecting pipe and the second connecting pipe along the length direction of the first connecting pipe, so as to reduce the probability of deformation or skew of the first connecting pipe and the second connecting pipe.

[0066] 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.

[0067] Therefore, the third connecting section can absorb the manufacturing tolerance of the first connecting pipe and the second connecting pipe along the length direction of the first connecting pipe, so as to reduce the probability of deformation or skew of the first connecting pipe and the second connecting pipe.

[0068] In some embodiments, the axial dimension of the third connecting section is greater than the axial dimension of the first grommet.

[0069] Thus, the third connecting segment can swing along the extension direction of the via hole, thereby absorbing the manufacturing tolerance of the first connecting pipe and the second connecting pipe along the extension direction of the via hole, so as to reduce the probability of generating deformation or skew of the first connecting pipe and the second connecting pipe.

[0070] In some embodiments, the axial dimension of the third connecting segment is less than or equal to the axial dimension of the first collar.

[0071] Thus, the third connecting segment can swing along the radial direction of the via hole, thereby absorbing the manufacturing tolerance of the first connecting pipe and the second connecting pipe along the radial direction of the via hole, so as to reduce the probability of generating deformation or skew of the first connecting pipe and the second connecting pipe.

[0072] In some embodiments, the bottom wall of the box body is connected with the battery cell, the side wall of the box body is spaced apart from the battery cell, and the minimum distance between the side wall of the box body and the battery cell ranges from 5mm to 35mm.

[0073] Thus, since the space occupation of the heat exchange assembly in the box body is reduced, the volume of the battery cell can be set larger. Within the above numerical range, the battery cell is not only not prone to friction with the side wall of the box body, but also can have a larger volume, so that a higher energy density can be obtained.

[0074] The power utilization device provided by the embodiments of the present application comprises the battery device described in any of the above embodiments, and the battery device is used for providing electricity

[0075] Since the power utilization device comprises the battery cell or the battery device described above, the power utilization device at least comprises all the beneficial effects of the battery cell or the battery device described above, which will not be described herein again.

[0076] The above description is only a summary of the technical solutions of the present application. In order to enable the technical means of the present application to be more clearly understood, and to be implemented according to the content of the description, and in order to enable the above and other purposes, characteristics and advantages of the present application to be more apparent and easy to understand, the following specific embodiments of the present application are described in detail. BRIEF DESCRIPTION OF DRAWINGS

[0077] 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 the drawings indicate the same or similar elements. In the drawings:

[0078] Figure 1 FIG. 1 is a structural schematic diagram of a power utilization device provided by some embodiments of the present application;

[0079] Figure 2is an explosion schematic diagram of a battery device provided by some embodiments of the present application;

[0080] Figure 3 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0081] Figure 4 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application; Figure 3 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0082] Figure 5 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0083] Figure 6 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0084] Figure 7 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application; Figure 6 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0085] Figure 8 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0086] Figure 9 is a schematic diagram of an assembly structure of a heat exchange main body and a joint provided by some embodiments of the present application;

[0087] Figure 10 is a schematic diagram of an assembly structure of a heat exchange main body and a joint provided by some embodiments of the present application;

[0088] Figure 11 is a sectional view of an A-A direction of the assembly structure of Figure 10 ;

[0089] Figure 12 is a schematic diagram of an assembly structure of a heat exchange main body and a joint provided by some embodiments of the present application;

[0090] Figure 13 is a partial structure schematic diagram of a battery device provided by some embodiments of the present application;

[0091] Figure 14 is a schematic diagram of an assembly structure of a connection structure, a first connection pipe and a second connection pipe provided by some embodiments of the present application;

[0092] Figure 15 is a schematic diagram of an assembly structure of a connection structure, a first connection pipe and a second connection pipe provided by some embodiments of the present application;

[0093] Figure 16 is a schematic diagram of an assembly structure of a connection structure, a first connection pipe and a second connection pipe provided by some embodiments of the present application;

[0094] Figure 17 is a schematic view of another perspective of the assembly structure of Figure 14

[0095] Figure 18 is a schematic view of another perspective of the assembly structure of Figure 15

[0096] Figure 19 is a schematic view of another perspective of the assembly structure of Figure 16

[0097] Figure 20 is a schematic view of the assembly structure of the connecting structure, the first connecting pipe and the second connecting pipe provided by some embodiments of the present application;

[0098] Figure 21 is a schematic view of another perspective of the assembly structure of Figure 20

[0099] BRIEF DESCRIPTION OF DRAWINGS

[0100] Battery device 100; box body 101; interface 1012; battery cell 10; heat exchange assembly 102; heat exchange main body 103; medium flow channel 21; current collector 20; connecting piece 30; joint 104; first wall 11; second wall 12; edge beam 1013; joint body 105; 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; electric device 1000; controller 200; motor 300; first box body 1010; second box body 1011. DETAILED DESCRIPTION

[0101] 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.

[0102] ​​​​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 this application; the use of the terms "including," "comprising," or "having" and variations thereof herein is intended to be broad and encompass the terms "consisting of" and "consisting essentially of" and variations thereof. Unless otherwise required by context, singular terms shall include pluralities and vice versa. Unless otherwise required by context, the use herein of the singular is also to be construed as a reference to the plural and vice versa.

[0103] 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 more than two, unless otherwise explicitly and specifically limited.

[0104] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification is not necessarily all referring to the same embodiment, or to a particular embodiment, or to a particular set of embodiments. It will be explicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0105] In the description of the embodiments of the present application, the term "and / or" is only a description of the 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.

[0106] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0107] 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 based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the embodiments of the present application and simplifying the description, and therefore cannot be understood as limiting the embodiments of the present application, which do not indicate or imply that the indicated devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the embodiments of the present application.

[0108] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0109] At present, from the development of market situation, the application of battery is more and more widely. 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 used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, and aerospace and other fields. With the continuous expansion of the application field of battery, the demand of its market is also increasing.

[0110] In the design and application of battery device, the temperature control of battery monomer is very important to ensure the battery performance, prolong the battery life and ensure the use safety. In order to effectively cool the battery monomer inside the battery device, it is usually necessary to integrate heat exchange components. The heat exchange components 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.

[0111] In order to continuously adjust the temperature of the battery monomer, it is necessary to introduce heat exchange medium into the heat exchange body to realize the circulation of the heat exchange medium, so as to improve the effect of temperature regulation.

[0112] The interface is provided on the box to meet the supply demand of heat exchange medium. In order to transport the heat exchange medium input by the interface to the plurality of heat exchange bodies, a manifold can be provided at the interface. And corresponding joints are provided on the plurality of heat exchange bodies, so as to realize the supply of heat exchange medium from the manifold to the plurality of heat exchange bodies. Although this makes each heat exchange body be able to supplement heat exchange medium, the joints and the pipelines connecting the plurality of joints and the manifold will occupy a large space, so that the heat exchange components occupy a large space in the battery device, so that the space utilization of the battery device is low, so that the energy density of the battery device is low under the same volume.

[0113] Based on the above considerations, the embodiment of the present application provides a battery device. The battery device connects multiple current collectors through a connecting piece, and at least one connector connects the connecting piece, the heat exchange main body and the interface. The multiple heat exchange main bodies are connected to the at least one connector through the current collectors and the connecting piece, and the medium channels in the multiple heat exchange main bodies are connected to each other, which simplifies the structure of the heat exchange assembly, reduces the space occupation of the heat exchange assembly, improves the space utilization in the battery device, and enables the battery device to accommodate larger volume battery monomers, thereby achieving higher energy density under the condition of the same volume.

[0114] Please refer to Figure 1 , Figure 1 is a structural schematic diagram of a 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 battery monomers 10, such as 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.

[0115] The following embodiments take a vehicle as an example for convenience of description.

[0116] The vehicle is internally provided with a battery device 100, which can be arranged at the bottom, the head or the tail of the vehicle. The battery device 100 can be used for power supply of the vehicle, for example, the battery device 100 can be used as an operating power source of the vehicle.

[0117] 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.

[0118] In the embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle, but also be used as a driving power source of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0119] Please refer to Figure 2 , Figure 2 is an exploded schematic diagram of a battery device 100 provided by some embodiments of the present application. The battery device 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 multiple battery monomers 10 connected in series, in parallel or in a mixed manner through a busbar component.

[0120] 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.

[0121] 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., and the present application is not limited thereto.

[0122] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells 10.

[0123] As an example, the battery cell assembly can be a battery module, which is 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.

[0124] In some embodiments, the battery device 100 can be a battery pack, which includes a box 101 and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box 101.

[0125] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box 101 by fixing the battery module in the box 101.

[0126] 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.

[0127] 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 a closed space is formed inside the box 101 to accommodate the battery cell assembly. Here, closed means covered or closed, which can be sealed or unsealed. The first box 1010 can be a top cover or a bottom plate.

[0128] 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 respectively connected with the frame, so that a closed space is formed inside the box 101 to accommodate the battery cell assembly.

[0129] 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.

[0130] 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.

[0131] Please refer to Figures 3 to 7 . Figure 3 is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 4 is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 3 is an enlarged schematic diagram of part a of the battery device 100 of Figure 5 is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 6 is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 7 is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application; Figure 6 is an enlarged schematic diagram of part b of the battery device 100 of

[0132] The battery device 100 provided by the embodiments of the present application includes a box body 101, a plurality of battery monomers 10, and a heat exchange assembly 102. The box body 101 is provided with an interface 1012 in communication with the outside. The plurality of battery monomers 10 are arranged in the box body 101. The heat exchange assembly 102 is arranged in the box body 101, and the heat exchange assembly 102 is configured to exchange heat with the battery monomers 10. The heat exchange assembly 102 includes a heat exchange main body 103, a current collector 20, a connecting piece 30, and a joint 104. The heat exchange main body 103 has a medium flow channel 21 inside, and the heat exchange main body 103 is arranged between adjacent battery monomers 10. The current collector 20 is connected to at least one end of the heat exchange main body 103, and the current collector 20 communicates with the medium flow channel 21. The connecting piece 30 connects a plurality of current collectors 20. The joint 104 is configured to be at least one, and the joint 104 connects the connecting piece 30, the heat exchange main body 103, and the interface 1012.

[0133] Specifically, the number of interfaces 1012 can be one or more. The interface 1012 can be used to communicate with an external supply source storing a heat exchange medium.

[0134] The number of battery monomers 10 can be two, three, four, or even more. The plurality of battery monomers 10 can be connected to each other or spaced apart from each other.

[0135] The heat exchange assembly 102 is a component for adjusting the temperature of the battery monomers 10, ensuring that the battery monomers 10 work within an optimal working temperature range. The heat exchange main body 103 can be a part of the heat exchange assembly 102 for providing heat exchange function. The number of heat exchange main bodies 103 can be two, three, four, or even more.

[0136] The heat exchange refers to heating or cooling the battery monomer 10. In the case of cooling the battery monomer 10, the heat exchange main body 103 can contain a cooling medium to regulate the temperature of the battery monomer 10, at this time, the heat exchange main body 103 can also be referred to as a cooling component or a cooling plate, etc. Among them, the cooling medium can be a cooling liquid or a cooling gas. In addition, the heat exchange main body 103 can also be used for heating, which is not limited in the embodiments of the present application.

[0137] The heat exchange main body 103 and the adjacent battery monomer 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 monomer 10. The heat exchange main body 103 and the battery monomer 10 can also be indirectly contacted through a heat conduction layer. For example, the heat exchange main body 103 and the battery monomer 10 can be contacted through a thin heat conduction layer (such as heat conduction glue, heat conduction pad, etc.) to improve the heat exchange efficiency.

[0138] The heat exchange main body 103 can pass the heat exchange medium through the joint 104 or the current collector 20 to realize the circulation of the heat exchange medium, thereby improving the heat exchange effect. The heat exchange medium can flow from the current collector 20 or the joint 104 into the medium flow channel 21 of the heat exchange main body 103, or in other words, the current collector 20 or the joint 104 can be in communication with the medium flow channel 21. The number of heat exchange main bodies 103 can be multiple, wherein a part of the heat exchange main bodies 103 are connected with the current collector 20, and another part of the heat exchange main bodies 103 are connected with the joint 104.

[0139] The outer wall of the heat exchange main body 103 can be in contact with the outer wall of the battery monomer 10. In use, the medium flow channel 21 inside the heat exchange main body 103 has a heat exchange medium, which can exchange heat with the outer wall of the heat exchange main body 103, so that the heat exchange between the heat exchange main body 103 and the battery monomer 10 is realized.

[0140] The medium flow channel 21 is a channel inside the heat exchange main body 103 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 main body 103, improving the heat exchange efficiency. The medium flow channel 21 can be linear, snake-shaped or other complex flow channel structure, and the specific shape is determined according to the actual application requirement. 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.

[0141] The heat exchange main body 103 can have one or more medium flow channels 21. For example, each heat exchange main body 103 can have one medium flow channel 21. For another example, each heat exchange main body 103 can have two medium flow channels 21, which can be independent or interconnected. The shape of the heat exchange main body 103 can be adapted to the shape of the battery monomer 10. For example, the heat exchange main body 103 can be in the shape of a cuboid, so as to facilitate the contact between the cuboid-shaped battery monomer 10 and the heat exchange main body 103.

[0142] The manifold 20 is a component connected to the heat exchange body 103, used for collecting and distributing the heat exchange medium. The manifold 20 is connected to at least one end of the heat exchange body 103, ensuring that the heat exchange medium can uniformly enter and flow out of the heat exchange body 103, improving the heat exchange efficiency. The manifold 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 manifold 20 can be designed with a flow guide structure to optimize the flow path of the heat exchange medium.

[0143] The connection between the manifold 20 and the heat exchange body 103 can be welding, bonding, etc. The inside of the manifold 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 body 103 and the manifold 20. The connection between the manifold 20 and the connecting piece 30 can be welding, bonding, etc. For example, the opposite areas of two adjacent manifolds 20 can be provided with through holes, and the connecting piece 30 can be bonded around the through holes, so that the two adjacent manifolds 20 are connected through the connecting piece 30.

[0144] The heat exchange body 103 can be made of high thermal conductivity material, such as aluminum or copper, to improve the heat exchange efficiency. The inside of the heat exchange body 103 can be filled with heat exchange medium, and heat exchange is achieved between the heat exchange medium and the wall of the heat exchange body 103, so as to realize the heat exchange between the heat exchange body 103 and the battery monomer 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.

[0145] The connecting piece 30 can be a circular tube, a square tube or a tube of other shapes. The connecting piece 30 and the manifold 20 can be connected by welding, bonding, etc. The connecting piece 30 and the heat exchange body 103 can also be integrally formed. The connecting piece 30 connects the manifolds 20, so that the multiple manifolds 20 can be connected to each other, thereby reducing the use amount of the joint 104 and reducing the space occupation of the joint 104.

[0146] The number of joints 104 can be one, two, three, four or even more. When the number of joints 104 is one, the space occupied by the joint 104 is smaller. When the number of joints 104 is two or more, more joints 104 can be used to introduce heat exchange medium into the medium flow channel 21, to improve the heat exchange efficiency.

[0147] One end of the connector 104 can be connected with the interface 1012. The connector 104 can be connected with the interface 1012 by flange connection, welding, or the like. For example, the outer side of the connector 104 can be provided with external threads, and the inner side of the interface 1012 can be provided with internal threads. The connector 104 and the interface 1012 can be screwed together by the external threads and the internal threads. The connector 104 can be arranged in the interface 1012 to facilitate connection with devices outside the battery device 100.

[0148] The other end of the connector 104 can be connected with the heat exchange main body 103 or the connecting piece 30. In one embodiment, the connector 104 can be arranged on the heat exchange main body 103 by flange or quick pipe connector, so as to improve the disassembly efficiency of the connector 104. In another embodiment, the connector 104 can be connected with the connecting piece 30 by welding or sleeving.

[0149] The connector 104 can be used for flowing of the heat exchange medium 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 connector 104 by the interface 1012, and then 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 output from the heat exchange main body 103 to the interface 1012 through the connector 104, or output from the heat exchange main body 103 to the connecting piece 30 through the current collector 20, and then input into the connector 104 from the connecting piece 30, and finally output from the connector 104 to the interface 1012. Therefore, by arranging the connector 104, the circulation of the heat exchange medium can be realized, so as to improve the heat exchange effect of the heat exchange main body 103. By arranging the connector 104, the interface 1012 can be in communication with the connecting piece 30 and the heat exchange main body 103, so that the heat exchange medium input from outside can flow into the medium channels of the plurality of heat exchange main bodies 103, thereby improving the heat exchange efficiency.

[0150] The connector 104 is located on one side of the box body 101, which means that the connector 104 is arranged close to the side wall of the box body 101. The connector 104 can be arranged adjacent to the interface 1012 arranged on the side wall of the box body 101.

[0151] In the battery device 100 of the embodiments of the present application, by arranging the connector 104 to connect the connecting piece 30, the heat exchange main body 103 and the interface 1012, the connector 104 can realize the charging of the fluid into the plurality of heat exchange main bodies 103, or the discharging of the fluid from the plurality of heat exchange main bodies 103. By connecting the plurality of heat exchange main bodies 103 to at least one connector 104 through the current collector 20 and the connecting piece 30, the medium channels inside the plurality of heat exchange main bodies 103 are in communication with each other, which simplifies the structure of the heat exchange assembly 102, reduces the space occupation of the heat exchange assembly 102, improves the space utilization in the battery device 100, and enables the battery device 100 to accommodate larger volume of battery monomers 10, thereby realizing higher energy density under the condition of the same volume.

[0152] Please refer to Figure 8 , Figure 8 is a partial structure diagram of a battery device 100 provided by some embodiments of the present application. In some embodiments, the battery cell 10 includes a first wall 11 and a second wall 12, the first wall 11 is connected to the second wall 12 at an angle, and the first wall 11 is connected to the heat exchange main body 103.

[0153] Specifically, the first wall 11 and the second wall 12 can each be a side wall of the battery cell 10. The first wall 11 and the heat exchange main body 103 can be in contact with each other. Heat exchange between the heat exchange main body 103 and the first wall 11 can be achieved by direct contact. For example, the outer surface of the heat exchange main body 103 is attached to the outer surface of the first wall 11. Heat exchange between the heat exchange main body 103 and the first wall 11 can also be achieved by indirect contact through a heat-conducting layer. For example, the heat exchange main body 103 and the first wall 11 can be in contact through a thin heat-conducting layer (such as heat-conducting glue, heat-conducting pad, etc.), so as to improve the heat exchange efficiency.

[0154] In this way, by arranging the heat exchange main body 103 between adjacent battery cells 10 and connecting the first wall 11 to the heat exchange main body 103, the contact area between the heat exchange main body 103 and the battery cell 10 can be increased, thereby improving the heat exchange efficiency.

[0155] Please refer to Figure 8 In some embodiments, the first wall 11 is the wall with the largest surface area in the battery cell 10.

[0156] Specifically, the number of columns of the battery cell 10 can be two, three, four, or even more. The plurality of battery cells 10 can be arranged in a direction of length, height, or width of one of the battery cells 10. For example, the plurality of battery cells 10 can be arranged in the length direction of one of the battery cells 10. For another example, the plurality of battery cells 10 can be arranged in the width direction of one of the battery cells 10.

[0157] The battery cell 10 can include a plurality of walls, and the first wall 11 with the largest surface area in 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 extension direction of the heat exchange main body 103. 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 entirely attached to the heat exchange main body 103, so as to improve the heat exchange effect of the battery cell 10.

[0158] In this way, by connecting the heat exchange main body 103 to the first wall 11 with the largest surface area in the battery cell 10, the heat exchange area between the heat exchange main body 103 and the battery cell 10 can be significantly increased, thereby improving the heat exchange efficiency.

[0159] Please refer to Figure 8 In some embodiments, a plurality of the battery cells 10 are arranged along a first direction y, in which the second walls 12 of two adjacent battery cells 10 are arranged in alignment.

[0160] Specifically, the second walls 12 of two adjacent battery cells 10 can be spaced apart or connected to each other.

[0161] In this way, the battery cells 10 can be closely arranged together, and this layout can more effectively utilize the space inside the battery device 100, improving the space utilization of the battery device 100.

[0162] Please refer to Figure 8 In some embodiments, the heat exchange bodies 103 and the battery cells 10 are arranged alternately along a second direction x, which intersects the first direction y.

[0163] Specifically, along the second direction x, the battery cells 10 and the heat exchange bodies 103 can be arranged alternately in the manner of heat exchange body 103, a column of battery cells 10, heat exchange body 103, or in the manner of a column of battery cells 10, heat exchange body 103, a column of battery cells 10.

[0164] In this way, the plurality of columns of battery cells 10 and the plurality of heat exchange bodies 103 are connected to form a whole and are accommodated in the box 101, which can effectively manage the heat of each column 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.

[0165] In some embodiments, the heat exchange bodies 103 are bonded to the first walls 11.

[0166] Specifically, bonding refers to using an adhesive to fixedly connect the heat exchange bodies 103 to the first walls 11 of the battery cells 10. Bonding can use heat-curable glue, 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.

[0167] In this way, bonding provides a firm fixing method, enhancing the structural stability between the heat exchange bodies 103 and the first walls 11 of the battery cells 10, and reducing displacement or damage due to vibration or impact during operation of the battery device 100. This enables the heat exchange bodies 103 to continuously conform to the first walls 11 to continuously regulate the temperature of the battery cells 10.

[0168] Please refer to Figure 4 and Figure 7In some embodiments, the box 101 comprises a side beam 1013 arranged near one end of the length direction of the heat exchange main body 103, and the interface 1012 is arranged on the side beam 1013.

[0169] Specifically, the box 101 is the shell of the battery device 100, used to accommodate and protect the battery monomer 10 and the heat exchange assembly 102. The box 101 provides the physical structure of the battery device 100, ensures the stable arrangement of the battery monomer 10 and the heat exchange assembly 102, and prevents the influence of the external environment on the battery device 100. The box 101 can be made of various materials, such as metal, plastic or composite material, and the specific selection depends on the application scenario and performance requirements of the battery device 100. The side beam 1013 is a part of the box 101, which is located at the edge of the box 101, used to enhance the structural strength of the box 101.

[0170] Arranging the interface 1012 on the side beam 1013 can optimize the external connection of the battery device 100, making it more convenient for the heat exchange medium to enter and exit, while reducing the occupation of the interface 1012 to the internal space of the battery device 100. During the manufacturing process of the battery device 100, the side beam 1013 can be installed first, and then the interface 1012 is installed on the side beam 1013. This design makes the installation of the interface 1012 more convenient, reducing the difficulty of manufacturing and assembly. For example, the interface 1012 can be fixed on the side beam 1013 by welding or bolt connection.

[0171] In this way, during actual use, one end of the length direction of the box 101 is close to other equipment outside the battery device 100. Therefore, the position of the side beam 1013 facilitates the connection of the joint 104 to other equipment outside the battery device 100 through the interface 1012.

[0172] Please refer to Figure 7 and Figure 9 , Figure 9 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 joint 104 comprises a joint body 105, a first connecting part 106, a second connecting part 107 and a third connecting part 108, the first connecting part 106 is connected to one end of the joint body 105 away from the heat exchange main body 103, the first connecting part 106 connects the interface 1012, the second connecting part 107 is connected to one of the two side walls opposite to the joint body 105, the third connecting part 108 is connected to the other of the two side walls opposite to the joint body 105, the second connecting part 107 is connected to the connecting piece 30 located on one side of the joint body 105, and the third connecting part 108 is connected to the connecting piece 30 located on the other side of the joint body 105.

[0173] Specifically, the first connecting part 106 is used to connect the interface 1012 and the connector body 105. The second connecting part 107 and the third connecting part 108 are used to connect the connector body 105 and different connecting pieces 30. The heat exchange medium can enter the connector body 105 from the interface 1012 through the first connecting part 106, and then be distributed into the second connecting part 107 and the third connecting part 108, and flow into the connecting pieces 30 located on both sides of the connector body 105 from the second connecting part 107 and the third connecting part 108, respectively. The heat exchange medium can also flow into the connector body 105 from the second connecting part 107 and the third connecting part 108, and then flow out of the connector body 105 through the first connecting part 106, and then flow out through the interface 1012. Therefore, through the arrangement of the connector 104, the heat exchange medium can form a circulation in the heat exchange assembly 102, thereby improving the heat exchange effect.

[0174] The number of the second connecting part 107 can be multiple. For example, the number of the second connecting part 107 can be two, and the two second connecting parts 107 are arranged on the connector body 105 in a spaced manner, and the two second connecting parts 107 are connected to the connecting pieces 30 located on both sides of the connector body 105, respectively. The number of the third connecting part 108 can also be multiple. For example, the number of the third connecting part 108 can be two, and the two third connecting parts 108 are arranged on the connector body 105 in a spaced manner, and the two third connecting parts 108 are connected to the connecting pieces 30 located on both sides of the connector body 105, respectively.

[0175] The first connecting part 106, the second connecting part 107, and the third connecting part 108 can be a pipe connecting port 1012, a flange connecting port 1012, or other forms of connecting points.

[0176] In this way, by arranging the connector body 105, the first connecting part 106, the second connecting part 107, and the third connecting part 108, the heat exchange medium can directly enter the heat exchange main body 103 connected with the connector body 105, or enter other heat exchange main bodies 103 through the connecting pieces 30, thereby improving the heat exchange efficiency. Moreover, since the second connecting part 107 and the third connecting part 108 are located on both sides of the connector body 105 and connected with the corresponding connecting pieces 30, the design of the connector 104 is compact, thereby reducing the space occupation of the connector 104.

[0177] Please refer to Figure 9 In some embodiments, the first connecting part 106 includes a water inlet connector 40 and a water outlet connector 50, and the water inlet connector 40 and the water outlet connector 50 are arranged on the same connector body 105.

[0178] Specifically, the heat exchange medium can flow into the joint body 105 through the water inlet joint 40, and can flow out of the joint body 105 through the water outlet joint 50, so as to realize circulation of the heat exchange medium and improve heat exchange efficiency.

[0179] In this way, by arranging the water inlet joint 40 and the water outlet joint 50 on the same joint body 105, the space occupation of the water inlet joint 40 and the water outlet joint 50 as a whole can be reduced, so as to improve the space utilization in the battery device 100 and enable the battery device 100 to accommodate a battery monomer 10 with a larger volume, thereby realizing a higher energy density under the condition of the same volume.

[0180] Please refer to Figure 5 In some embodiments, the current collector 20 is connected to the first end of one of the heat exchange bodies 103, and the water inlet joint 40 and the water outlet joint 50 are both connected to the first end of the other heat exchange body 103.

[0181] Specifically, the water inlet joint 40 and the water outlet joint 50 can be connected to the first end of the heat exchange body 103 through the joint body 105. The first end of each heat exchange body 103 is on the same side of the whole heat exchange body 103.

[0182] In this way, the current collector 20, the water inlet joint 40 and the water outlet joint 50 are all connected to the same end of the whole heat exchange body 103, which reduces the connection points between the parts of the heat exchange assembly 102, so as to make the structure of the heat exchange assembly 102 more compact and integrated, thereby improving the space utilization in the battery device 100 and enabling the battery device 100 to accommodate a battery monomer 10 with a larger volume, thereby realizing a higher energy density under the condition of the same volume.

[0183] In some embodiments, the current collector 20 is connected to the first end of one of the heat exchange bodies 103, the water inlet joint 40 is connected to the first end of the other heat exchange body 103, and the water outlet joint 50 is connected to the second end of the other heat exchange body 103.

[0184] Specifically, the water inlet joint 40 can be connected to the first end of the heat exchange body 103 through the joint body 105. The water outlet joint 50 can be connected to the second end of the heat exchange body 103 through the joint body 105.

[0185] Thus, placing the collector 20 at the same end of the heat exchange body 103 facilitates the installation of the connector 30. If the external pipes connecting the inlet connector 40 and the outlet connector 50 were located on the same side, they would occupy a large amount of space, making them unsuitable for some space-constrained applications. By placing the inlet connector 40 and the outlet connector 50 at different ends of the heat exchange body 103, the space occupied by the external pipes connecting the inlet connector 40 and the outlet connector 50 on one side can be reduced, thereby meeting the space arrangement requirements of the external pipes.

[0186] In some embodiments, the heat exchange body 103 is connected to the first end and the second end of the heat exchange body 103 via the collector 20, and the water inlet connector 40 and the water outlet connector 50 are both connected to the first end of the heat exchange body 103.

[0187] This design allows the fluid to be distributed more evenly to each heat exchanger 103, optimizing the fluid flow path and thus improving heat exchange efficiency.

[0188] In some embodiments, a first end of a portion of the heat exchange body 103 and a second end of a portion of the heat exchange body 103 are both connected to the collector 20, the water inlet connector 40 is connected to the first end of another portion of the heat exchange body 103, and the water outlet connector 50 is connected to the second end of another portion of the heat exchange body 103.

[0189] This design allows the fluid to be distributed more evenly to each heat exchanger 103, optimizing the fluid flow path and thus improving heat exchange efficiency. Furthermore, by placing the inlet connector 40 and outlet connector 50 at different ends of the heat exchanger 103, the space occupied by external pipes connecting the inlet connector 40 and outlet connector 50 on one side can be reduced, thereby meeting the space requirements for external pipe arrangement.

[0190] Please refer to Figure 9 In some embodiments, the inlet connector 40 and the outlet connector 50 are spaced apart along a third direction z.

[0191] Specifically, the third direction z can be parallel to the extension direction of the side of the joint body 105 away from the heat exchange body 103, or it can intersect with the extension direction of the side of the joint body 105 away from the heat exchange body 103.

[0192] Thus, by setting the inlet connector 40 and the outlet connector 50 at intervals along the third direction z, the space occupied by the inlet connector 40 and the outlet connector 50 in other directions is reduced, thereby reducing the overall space occupied by the inlet connector 40 and the outlet connector 50.

[0193] Please refer to Figure 10 andFigure 11 , Figure 10 is a schematic view of an assembly structure of the heat exchange main body 103 and the joint 104 provided by some embodiments of the present application; Figure 11 is a sectional view of the assembly structure of Figure 10 in the A-A direction. In some embodiments, along the third direction z, the central axis of the water inlet joint 40 and the central axis of the water outlet joint 50 overlap with each other.

[0194] 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 third 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 third direction z have an overlapping area.

[0195] Thus, in the third 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.

[0196] Please refer to Figure 5 and Figure 12 , Figure 12 is a schematic view of an 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 water inlet joint 40 comprises 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 joint body 105; the water outlet joint 50 comprises 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 joint body 105; 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.

[0197] 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, and at this 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, and at this 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 connection requirements along the third direction z.

[0198] 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.

[0199] Thus, since the first section 41 and the second section 42 of the water inlet joint 40 and the third section 51 and the fourth section 52 of the water outlet joint 50 are parallel to each other, this layout helps to make more efficient use of space, thereby improving the space utilization of the battery device 100.

[0200] In some embodiments, the first connecting part 106 comprises a water inlet joint 40 and a water outlet joint 50, which are respectively arranged on two adjacent joint bodies 105.

[0201] Specifically, the water inlet joint 40 and the water outlet joint 50 can be connected to the corresponding parts on the two adjacent joint bodies 105 by adhesion, welding or the like, or can be integrally formed with the corresponding joint bodies 105.

[0202] Thus, arranging the water inlet joint 40 and the water outlet joint 50 on two adjacent joint bodies 105 can reduce the overall space occupation of the water inlet joint 40 and the water outlet joint 50. Moreover, arranging the joints 104 on different joint bodies 105 can facilitate the layout of the water inlet joint 40 and the water outlet joint 50, thereby facilitating the manufacture of the water inlet joint 40 and the water outlet joint 50 and reducing manufacturing complexity.

[0203] Please refer to Figure 9 In some embodiments, the joint body 105 comprises 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 connecting piece 30 is connected to the second side surface 23, and the water inlet joint 40 and the water outlet joint 50 are both connected to the first side surface 22.

[0204] Specifically, in the case where the joint body 105 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.

[0205] Thus, connecting the connecting piece 30 to the second side surface 23 with a larger surface area facilitates the passage of a larger flow of heat exchange medium into the medium flow channel 21 of the heat exchange main body 103, thereby improving the heat exchange efficiency of the heat exchange main body 103. The water inlet joint 40 and the water outlet joint 50 are both connected to the first side surface 22 with a smaller surface area, which reduces the space occupation of the water inlet joint 40 and the water outlet joint 50 on the heat exchange main body 103, thereby improving the space utilization of the battery device 100.

[0206] Please refer to Figure 13 , Figure 13is a partial structural schematic diagram of the battery device 100 provided by some embodiments of the present application. In some embodiments, the connecting member 30 comprises a first connecting pipe 31 and a second connecting pipe 32, both of which are in communication with the medium flow channel 21, the first connecting pipe 31 is in communication with the water inlet joint 40, and the second connecting pipe 32 is in communication with the water outlet joint 50.

[0207] 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.

[0208] The first connecting pipe 31 and the second connecting pipe 32 can be used to communicate the medium flow channel 21 of different heat exchange bodies 103. The first connecting pipe 31 and the second connecting pipe 32 can be connected at different positions of different heat exchange bodies 103.

[0209] The heat exchange medium can enter the joint body 105 through the water inlet joint 40, part of which flows into the medium flow channel 21 of the corresponding heat exchange body 103 through the joint body 105. Another part enters the first connecting pipe 31 through the joint body 105, and then flows into the medium flow channel 21 of another joint body 105 through the first connecting pipe 31. The heat exchange medium in the joint body 105 not connected with the joint 104 can flow to the corresponding current collector 20 through the second connecting pipe 32, and then flow to the joint body 105 through the second connecting pipe 32, and then flow to the interface 1012 through the joint body 105. The heat exchange medium in the joint body 105 connected with the joint 104 can flow to the interface 1012 directly through the joint body 105.

[0210] The first connecting pipe 31 and the joint body 105 can be connected by welding, bonding or the like, and the first connecting pipe 31 and the joint body 105 can also be integrally formed. For example, a through hole in communication with the medium flow channel 21 can be formed on the joint body 105, and the first connecting pipe 31 is bonded around the through hole so that the first connecting pipe 31 is in communication with the medium flow channel 21.

[0211] The second connecting pipe 32 and the joint body 105 can be connected by welding, bonding or the like, and the second connecting pipe 32 and the joint body 105 can also be integrally formed. For example, a through hole in communication with the medium flow channel 21 can be formed on the joint body 105, and the second connecting pipe 32 is bonded around the through hole so that the second connecting pipe 32 is in communication with the medium flow channel 21.

[0212] In this way, the heat exchange medium can be filled into the medium flow channel 21 through the first connecting pipe 31. The heat exchange medium in the medium flow channel 21 can flow out of the medium flow channel 21 through the second connecting pipe 32. This enables the heat exchange medium to circulate, thereby improving the heat exchange efficiency.

[0213] Please refer to Figure 11 In some embodiments, the joint body 105 has a first main flow channel 310, which is in communication with the first connecting pipe 31. The joint body 105 also has a first branch flow channel 24 and a second branch flow channel 25. The first branch flow channel 24 is in communication with the first main flow channel 310 and the medium flow channel 21. The second branch flow channel 25 is in communication with the first main flow channel 310 and the water inlet joint 40.

[0214] The joint body 105 also has a second main flow channel 320, which is in communication with the second connecting pipe 32. The joint body 105 also has a third branch flow channel 26 and a fourth branch flow channel 27. The third branch flow channel 26 is in communication with the second main flow channel 320 and the medium flow channel 21. The fourth branch flow channel 27 is in communication with the second main flow channel 320 and the water outlet joint 50.

[0215] Specifically, the number of the first branch flow channel 24, the second branch flow channel 25, the third branch flow channel 26, and the fourth branch flow channel 27 can be one or more.

[0216] The first main flow channel 310 and the second main flow channel 320 can pass through the corresponding joint body 105. The first branch flow channel 24 and the second branch flow channel 25 can be arranged in the joint body 105. The first main flow channel 310 is an inflow channel for the heat exchange medium. The heat exchange medium can flow from the water inlet joint 40 to the second branch flow channel 25, then from the second branch 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 branch flow channel 26, then from the third branch flow channel 26 to the second main flow channel 320, then from the second main flow channel 320 to the fourth branch flow channel 27, and then from the fourth branch flow channel 27 to the water outlet joint 50.

[0217] 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 collector 20 is located. The branch flow channel can enable the heat exchange medium to flow into the medium flow channel 21 of the heat exchange body 103. 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.

[0218] In other embodiments, the current collector 20 can have a third main flow channel and a fourth main flow channel, the third main flow channel can be in communication with the first connecting pipe 31, and the fourth main flow channel can be in communication with the second connecting pipe 32. The current collector 20 can also have a fifth branch flow channel and a sixth branch flow channel, the fifth branch flow channel can be in communication with the third main flow channel and the medium flow channel 21, and the sixth branch flow channel can be in communication with the fourth main flow channel and the medium flow channel 21. In this way, the heat exchange medium can also be reliably filled or discharged when flowing through the corresponding heat exchange main body 103 of the current collector 20.

[0219] Please refer to Figure 11 In some embodiments, the medium flow channel 21 includes a plurality of first chambers 210 and a plurality of second chambers 211, and the joint body 105 further includes a first current collector 28 and a second current collector 29, the first current collector 28 is in communication with the first branch flow channel 24 and the first chamber 210, and the second current collector 29 is in communication with the third branch flow channel 26 and the second chamber 211.

[0220] Specifically, the number of first chambers 210 can be two, three, four or even more. The number of second chambers 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.

[0221] The heat exchange medium can flow from the first chamber 210 to the second chamber 211. The first current collector 20 can be used to branch the heat exchange medium. The second current collector 20 can be used to collect the heat exchange medium. The first current collector 20 and the first chamber 210 can have a plurality of passage openings. The second current collector 20 and the second chamber 211 can have a plurality of passage openings. When the number of first branch flow channels 24 and third branch flow channels 26 is one, the first branch flow channel 24 can be connected with a corresponding passage opening on the first current collector 20. After the heat exchange medium flows from the first branch flow channel 24 into the first current collector 20, it can be transported into a plurality of first chambers 210 from a plurality of paths respectively. In this way, the heat exchange medium can uniformly flow into each part of the heat exchange assembly 102, thereby reducing the probability of vortex dead zone after the heat exchange medium flows into the first chamber 210, and reducing local flow resistance.

[0222] 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 current collector 20 through a plurality of paths, and then flow to the third branch flow channel 26 through the second current collector 20. In this way, the heat exchange medium can uniformly flow to each part of the heat exchange member, thereby reducing the probability of vortex dead zone after the heat exchange medium flows into the second chamber 211, and reducing local flow resistance.

[0223] Therefore, the current collector 20 can have a flow distribution function, which can reduce the probability of vortex dead zones after the heat exchange medium flows into the medium flow channel 21, reduce local flow resistance, and thus help to optimize the flow path of the heat exchange medium in the medium flow channel 21, ensure that the heat exchange medium can uniformly flow through each chamber, and improve the uniformity of heat exchange.

[0224] Please refer to Figure 13 In some embodiments, the connecting member 30 includes a first connecting pipe 31 and a second connecting pipe 32, both of which are in communication with the medium flow channel 21, and 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 in the third direction z.

[0225] Therefore, 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 in the third direction z. Therefore, the connecting member 30 occupies less space in the battery device 100, which improves the space utilization of the battery device 100, thereby improving the energy density of the battery device 100 under the same volume.

[0226] Please refer to Figure 13 In some embodiments, the center axis of the first connecting pipe 31 and the center axis of the second connecting pipe 32 overlap each other in the third direction z.

[0227] 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 third 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 third direction z have overlapping regions.

[0228] Therefore, in the third direction z, the projections of the first connecting pipe 31 and the second connecting pipe 32 have overlapping regions, so that the overall space occupation of the first connecting pipe 31 and the second connecting pipe 32 can be further reduced.

[0229] Please refer to Figure 13 In some embodiments, the battery device 100 further includes 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.

[0230] Specifically, the connecting structure 60 can be connected with the first connecting pipe 31 or the second connecting pipe 32 by means of screwing, welding or the like. 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.

[0231] 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 less likely to be displaced or misaligned 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 the first connecting pipe 31 and the second connecting pipe 32 do not need to be assembled separately, thereby improving the assembly efficiency.

[0232] Please refer to Figure 13 In some embodiments, the number of connecting structures 60 is multiple, and the multiple connecting structures 60 are arranged at intervals along the second direction x.

[0233] Specifically, the number of connecting structures 60 can be two, three, four or even more. The connecting structure 60 can be connected with the first connecting pipe 31 or multiple positions of the second connecting pipe 32.

[0234] 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 first connecting pipe 31 and the second connecting pipe 32 from being skewed.

[0235] 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 connections through the other connecting structures 60.

[0236] Please refer to Figure 14 In some embodiments, each connecting structure 60 is arranged between two adjacent heat exchange assemblies 102.

[0237] In this way, arranging the connecting structure 60 between the current collectors 20 can optimize the spatial layout inside the battery device 100, reduce the occupation of the connecting structure 60 to the internal space of the battery device 100, and improve the space utilization.

[0238] Please refer to Figure 15 , Figure 16 andFigure 14 , 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 14 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 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.

[0239] 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.

[0240] The inner side surface of the first collar 62 can be in contact with the inner side surface of the first connecting pipe 31. The inner side surface of the second collar 63 can be in contact with the inner side surface of the second connecting pipe 32. The connecting rib 61 can be connected to the outer side surface of the first collar 62 and can be connected to the outer side surface of the second collar 63.

[0241] 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 between 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.

[0242] In this way, by providing 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.

[0243] Please refer to Figure 17 and Figure 17 , Figure 14 is Figure 15This is a schematic diagram of the assembly structure from another perspective. In some embodiments, the connecting rib 61 includes a first portion 610 and a second portion 611 connected at an angle to the first portion 610, the first portion 610 being connected to the first collar 62, and the second portion 611 being connected to the second collar 63.

[0244] Specifically, the angle between the first part 610 and the second part 611 can be an acute angle, a right angle, or an obtuse angle. For example, if the angle between the first part 610 and the second part 611 is a right angle, the first part 610 and the second part 611 can form an "L" shape. The first part 610 and the second part 611 can be manufactured separately and then connected by means of bonding, welding, etc. In this way, the overall manufacturing cost of the connecting rib 61 is lower. The first part 610 and the second part 611 can also be integrally formed. In this way, the integrally formed connecting rib 61 reduces the possible weaknesses in connecting the parts, so the connecting rib 61 has higher structural strength and is less prone to breakage during use.

[0245] Thus, since the first part 610 and the second part 611 are connected at an angle, the connecting rib 61 can be applied to the first connecting pipe 31 and the second connecting pipe 32 with different center distances, thereby improving the commonality of the connecting structure 60.

[0246] Please refer to Figure 16 , Figure 18 , Figure 19 and Figure 18 , Figure 15 yes Figure 19 A schematic diagram of the assembly structure from another perspective; Figure 16 yes Figure 15 This is a schematic diagram of the assembly structure from another perspective. In some embodiments, the connecting rib 61 includes a first connecting segment 612, a second connecting segment 613, and a third connecting segment 614. The first connecting segment 612 is connected to the first collar 62, the second connecting segment 613 is connected to the second collar 63, and the third connecting segment 614 is a ring-shaped structure with openings at both ends. The first connecting segment 612 and the second connecting segment 613 are connected to opposite sides of the third connecting segment 614.

[0247] 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 other methods. This reduces the overall manufacturing cost of the connecting rib 61. Alternatively, the first connecting segment 612, the second connecting segment 613, and the third connecting segment 614 can be integrally formed. This integrally formed connecting rib 61 reduces potential weaknesses in the connection, resulting in higher structural strength and making it less prone to breakage during use.

[0248] Thus, the third connecting section 614 of the ring structure can more evenly disperse the stress on the connecting rib 61, reduce 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. Meanwhile, the third connecting section 614 can also absorb manufacturing tolerances, thereby reducing the probability of the first connecting pipe 31 and the second connecting pipe 32 generating assembly deformation or skew.

[0249] Please refer to Figure 18 and Figure 16 In some embodiments, 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.

[0250] Specifically, the shape of the via hole 6140 can be circular, elliptical or other suitable shapes. By setting the via hole 6140, the third connecting section 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 section 614.

[0251] Thus, the third connecting section 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 the first connecting pipe 31 and the second connecting pipe 32 generating assembly deformation or skew.

[0252] Please refer to Figure 19 , Figure 20 , Figure 21 and Figure 20 , 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 in some embodiments of the present application; Figure 20 is Figure 16 a schematic diagram of another view of the assembly structure of the connecting structure 60, the first connecting pipe 31 and the second connecting pipe 32 provided in some embodiments of the present application. In some embodiments, the third connecting section 614 has a via hole 6140, and the extension direction m of the via hole 6140 is perpendicular to the length direction of the first connecting pipe 31.

[0253] Thus, the third connecting section 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 the first connecting pipe 31 and the second connecting pipe 32 generating assembly deformation or skew.

[0254] Please refer to Figure 20 and 19 , 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 in some embodiments of the present application; Figure 20 is Figure 20a schematic view of another perspective of the assembly structure. In some embodiments, the axial dimension of the third connecting segment 614 is greater than the axial dimension of the first collar 62.

[0255] In this way, the third connecting segment 614 can swing along the extension direction m of the through hole 6140, thereby absorbing the manufacturing tolerance of the first connecting pipe 31 and the second connecting pipe 32 along the extension direction m of the through hole 6140, thereby reducing the probability of the first connecting pipe 31 and the second connecting pipe 32 being deformed or skewed in assembly.

[0256] Please refer to Figure 4 and 21 In some embodiments, the axial dimension of the third connecting segment 614 is less than or equal to the axial dimension of the first collar 62.

[0257] In this way, the third connecting segment 614 can swing along the radial direction n of the through hole 6140, thereby absorbing the manufacturing tolerance of the first connecting pipe 31 and the second connecting pipe 32 along the radial direction n of the through hole 6140, thereby reducing the probability of the first connecting pipe 31 and the second connecting pipe 32 being deformed or skewed in assembly.

[0258] In some embodiments, the bottom wall of the box 101 is connected with the battery monomer 10, the side wall of the box 101 is spaced apart from the battery monomer 10, and the minimum distance between the side wall of the box 101 and the battery monomer 10 is in the range of [5mm, 35mm].

[0259] Specifically, the battery monomer 10 can be connected with the bottom wall of the box 101 by bolt connection, welding, bonding or the like. The minimum distance between the side wall of the box 101 and the battery monomer 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 101 and the battery monomer 10 can be 5mm, 10mm, 15mm, 20mm, 35mm or the like.

[0260] Since the space occupation of the heat exchange assembly 102 in the box 101 is reduced, the volume of the battery monomer 10 can be set larger. Within the above numerical range, the battery monomer 10 is not only not easy to rub against the side wall of the box 101, but also can have a larger volume, thereby being able to obtain a higher energy density.

[0261] In one specific embodiment, the battery device 100 provided by the embodiments of the present application includes a box 101, a plurality of battery monomers 10 and a heat exchange assembly 102. The battery monomers 10 and the heat exchange assembly 102 are both arranged in the box 101. The heat exchange assembly 102 is configured to exchange heat with the battery monomers 10.

[0262] The bottom wall of the box 101 is connected with the battery monomer 10, the side wall of the box 101 is spaced from the battery monomer 10, and the minimum distance between the side wall of the box 101 and the battery monomer 10 is in the range of [5mm, 35mm]. Please refer to Figure 7 and Figure 8 The box 101 includes a side beam 1013. The side beam 1013 is arranged near one end of the length direction of the heat exchange main body 103. Two interfaces 1012 for communicating with the outside are arranged on the side beam 1013. One of the two interfaces 1012 is used for the inflow of the heat exchange medium, and the other interface 1012 is used for the outflow of the heat exchange medium.

[0263] Please refer to Figure 5 A plurality of battery monomers 10 are arranged in the box 101 along the first direction y. The battery monomer 10 includes a first wall 11 and a second wall 12. The first wall 11 is connected with the second wall 12 at an angle. The first wall 11 is the wall with the largest surface area in the battery monomer 10. The first wall 11 is bonded with the heat exchange main body 103. In the first direction y, the second walls 12 of two adjacent battery monomers 10 are arranged in alignment.

[0264] Please refer to Figure 8 The heat exchange assembly 102 includes the heat exchange main body 103, the current collector 20, the connecting piece 30, and the joint 104. The heat exchange main body 103 has a medium flow channel 21 inside, and the heat exchange main body 103 is arranged between adjacent battery monomers 10. The current collector 20 is connected to the first end of a part of the heat exchange main body 103, and the water inlet joint 40 and the water outlet joint 50 are both connected to the first end of another part of the heat exchange main body 103. The connecting piece 30 connects a plurality of current collectors 20. The joint 104 is configured as at least one, and the joint 104 connects the connecting piece 30, the heat exchange main body 103, and the interface 1012.

[0265] Please refer to Figure 11 The heat exchange main body 103 and the battery monomer 10 are arranged alternately in the second direction x, and the second direction x intersects the first direction y.

[0266] Please refer to Figure 13 and Figure 9 The connecting piece 30 includes a first connecting pipe 31 and a second connecting pipe 32, and 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 and the second connecting pipe 32 are arranged on the same side of the battery monomer 10. Along the third direction z, the central axis of the first connecting pipe 31 and the central axis of the second connecting pipe 32 overlap each other.

[0267] Please refer to Figure 11The connector 104 comprises a connector body 105, a first connecting portion 106, a second connecting portion 107 and a third connecting portion 108. The first connecting portion 106 is connected to one end of the connector body 105 away from the heat exchange main body 103. The first connecting portion 106 is connected to the connection interface 1012. The second connecting portion 107 is connected to one of the two side walls of the connector body 105 opposite to the first connecting portion 106. The third connecting portion 108 is connected to the other of the two side walls of the connector body 105 opposite to the first connecting portion 106. The second connecting portion 107 is connected to the connecting member 30 on one side of the connector body 105. The third connecting portion 108 is connected to the connecting member 30 on the other side of the connector body 105.

[0268] The connector body 105 comprises a first side surface 22 and a second side surface 23 connected to the first side surface 22. The second side surface 23 has a larger surface area than the first side surface 22. The connecting member 30 is connected to the second side surface 23. The water inlet connector 40 and the water outlet connector 50 are both connected to the first side surface 22.

[0269] The first connecting portion 106 comprises the water inlet connector 40 and the water outlet connector 50. The water inlet connector 40 and the water outlet connector 50 are arranged on the same connector body 105. The water inlet connector 40 is in communication with the first connecting pipe 31. The water outlet connector 50 is in communication with the second connecting pipe 32. The water inlet connector 40 and the water outlet connector 50 are arranged in the third direction z. In the third direction z, the central axis of the water inlet connector 40 and the central axis of the water outlet connector 50 overlap each other.

[0270] Please refer to Figure 13 The connector body 105 has a first main flow channel 310. The first main flow channel 310 is in communication with the first connecting pipe 31. The connector body 105 has a first branch flow channel 24 and a second branch flow channel 25. The first branch flow channel 24 is in communication with the first main flow channel 310 and the medium flow channel 21. The second branch flow channel 25 is in communication with the first main flow channel 310 and the water inlet connector 40.

[0271] The connector body 105 further has a second main flow channel 320. The second main flow channel 320 is in communication with the second connecting pipe 32. The connector body 105 further has a third branch flow channel 26 and a fourth branch flow channel 27. The third branch flow channel 26 is in communication with the second main flow channel 320 and the medium flow channel 21. The fourth branch flow channel 27 is in communication with the second main flow channel 320 and the water outlet connector 50.

[0272] The medium flow channel 21 comprises a plurality of first chambers 210 and a plurality of second chambers 211. The connector body 105 further comprises a first flow collector 28 and a second flow collector 29. The first flow collector 28 is in communication with the first branch flow channel 24 and the first chambers 210. The second flow collector 29 is in communication with the third branch flow channel 26 and the second chambers 211.

[0273] Please refer to Figure 15 and ​The battery device 100 further comprises a plurality of connecting structures 60, one end of each connecting structure 60 is connected with the first connecting pipe 31, and the other end of each connecting structure 60 is connected with the second connecting pipe 32. The connecting structures 60 are arranged at intervals along the second direction x. Each connecting structure 60 is arranged between two adjacent heat exchange assemblies 102.

[0274] The connecting structure 60 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.

[0275] 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 with the first collar 62. The second connecting section 613 is connected with the second collar 63. The third connecting section 614 is a ring structure with two open ends. The first connecting section 612 and the second connecting section 613 are connected on two opposite sides of the third connecting section 614. The third connecting section 614 has a via hole 6140. The extension direction m of the via hole 6140 is parallel to the length direction of the first connecting pipe 31.

[0276] 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 specification 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 is equipped with an interface for communication with the outside. Multiple battery cells; the multiple battery cells are arranged inside the housing; A heat exchange assembly is disposed within the housing and configured to exchange heat with the individual battery cells; wherein the heat exchange assembly includes: A heat exchange body has a medium flow channel inside, and the heat exchange body is disposed between adjacent battery cells; A collector is connected to at least one end of the heat exchange body, and the collector is connected to the medium flow channel; Connector, for connecting multiple current collectors; A connector, configured as at least one, connects the connector, the heat exchange body, and the interface.

2. The battery device according to claim 1, characterized in that, The battery cell includes a first wall and a second wall, the first wall and the second wall are connected at an angle, and the first wall is connected to the heat exchange body.

3. The battery device according to claim 2, characterized in that, The first wall is the wall with the largest surface area in the battery cell.

4. The battery device according to claim 2, characterized in that, The plurality of battery cells are arranged along a first direction, wherein the second walls of two adjacent battery cells are aligned in the first direction.

5. The battery device according to claim 4, characterized in that, The heat exchanger body and the battery cell are alternately arranged in a second direction, which intersects with the first direction.

6. The battery device according to claim 2, characterized in that, The heat exchanger body is bonded to the first wall.

7. The battery device according to claim 1, characterized in that, The housing includes a side beam, which is located at one end near the length of the heat exchange body, and the interface is located on the side beam.

8. The battery device according to claim 1, characterized in that, The connector includes a connector body, a first connecting part, a second connecting part, and a third connecting part. The first connecting part is connected to the end of the connector body away from the heat exchange body and is connected to the interface. The second connecting part is connected to one of the two side walls opposite to the connector body. The third connecting part is connected to the other of the two side walls opposite to the connector body. The second connecting part is connected to a connector located on one side of the connector body, and the third connecting part is connected to a connector located on the other side of the connector body.

9. The battery device according to claim 8, characterized in that, The first connection part includes an inlet connector and an outlet connector, which are disposed on the same connector body.

10. The battery device according to claim 9, characterized in that, The current collector is connected to the first end of one part of the heat exchange body, and the inlet and outlet connectors are both connected to the first end of the other part of the heat exchange body.

11. The battery device according to claim 9, characterized in that, The water collector is connected to the first end of one part of the heat exchange body, the water inlet is connected to the first end of another part of the heat exchange body, and the water outlet is connected to the second end of another part of the heat exchange body.

12. The battery device according to claim 9, characterized in that, The heat exchanger body has a first end and a second end connected to the collector, and the water inlet and water outlet are both connected to the first end of the heat exchanger body.

13. The battery device according to claim 9, characterized in that, The first end of one portion of the heat exchanger body and the second end of one portion of the heat exchanger body are both connected to the collector, the water inlet connector is connected to the first end of the other portion of the heat exchanger body, and the water outlet connector is connected to the second end of the other portion of the heat exchanger body.

14. The battery device according to claim 9, characterized in that, The inlet connector and the outlet connector are spaced apart along a third direction.

15. The battery device according to claim 14, characterized in that, Along the third direction, the central axis of the water inlet connector overlaps with the central axis of the water outlet connector.

16. The battery device according to claim 14 or 15, characterized in that, 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 connector body; 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 connected to the connector body; 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.

17. The battery device according to claim 8, characterized in that, The first connection part includes an inlet connector and an outlet connector, which are respectively disposed on two adjacent connector bodies.

18. The battery device according to claim 9 or 17, characterized in that, The connector body includes a first side and a second side connected to the first side. The surface area of ​​the second side is larger than the surface area 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.

19. The battery device according to claim 9 or 17, characterized in that, The connector includes a first connecting pipe and a second connecting pipe, both of which 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.

20. The battery device according to claim 19, characterized in that, The connector body has a first main channel, which is connected to the first connecting pipe. The connector body also 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 connector body also has a second main channel, which is connected to the second connecting pipe. The connector body 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.

21. The battery device according to claim 20, characterized in that, The medium flow channel includes multiple first chambers and multiple second chambers. The connector body 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.

22. The battery device according to claim 1, characterized in that, The connector includes a first connecting pipe and a second connecting pipe, both of which are in communication with the medium flow channel. The first connecting pipe and the second connecting pipe are disposed on the same side of the battery cell, and the first connecting pipe and the second connecting pipe are spaced apart along a third direction.

23. The battery device according to claim 22, characterized in that, Along the third direction, the central axis of the first connecting pipe overlaps with the central axis of the second connecting pipe.

24. The battery device according to claim 22, 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.

25. The battery device according to claim 24, characterized in that, The number of connection structures is multiple, and the multiple connection structures are spaced apart along the second direction.

26. The battery device according to claim 25, characterized in that, Each of the connection structures is disposed between two adjacent heat exchange components.

27. The battery device according to claim 24, characterized in that, The connecting structure includes a connecting rib, a first collar and a second collar. The first collar is sleeved on the first connecting pipe and the second collar is sleeved on the second connecting pipe. The connecting rib connects the first collar and the second collar.

28. The battery device according to claim 27, 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.

29. The battery device according to claim 27, 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.

30. The battery device according to claim 29, 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.

31. The battery device according to claim 29, 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.

32. The battery device according to claim 31, characterized in that, The axial dimension of the third connecting segment is greater than the axial dimension of the first collar.

33. The battery device according to claim 31, characterized in that, The axial dimension of the third connecting segment is less than or equal to the axial dimension of the first collar.

34. 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].

35. An electrical appliance, characterized in that, include: The battery device according to any one of claims 1-34 is used to provide electrical energy.

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