Battery device, energy storage device and power utilization device

Abstract

The utility model discloses a battery device, an energy storage device and a power utilization device. The battery device comprises a box body which is provided with an interface piece communicated with the outside; a plurality of battery cells; 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 exchange heat with the single batteries; wherein the heat exchange assembly comprises a heat exchange main body which is internally provided with a medium flow channel, and the heat exchange main body is arranged between adjacent single batteries; the current collector is connected with at least one end of the heat exchange main body and communicates with the medium flow channel; the connecting piece is connected with the plurality of current collectors; and the at least one connector is connected with the current collector and the interface piece. In the battery device, the fluid for heat exchange can enter and exit from the current collector through the interface piece and the joint, and the current collector and the connecting piece are used for shunting the fluid to each heat exchange main body and collecting the fluid flowing out of each heat exchange main body, so that the heat exchange main body can be used for heat exchange between the battery monomers and the fluid.

Description

TECHNICAL FIELD

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

[0002] With the development of the new energy power automobile industry, in order to pursue higher energy density, the structural design in the battery pack is more and more compact. At present, the battery monomers of the battery pack are mainly cooled by liquid cooling. Therefore, it is necessary to provide a battery device capable of conveying fluid for heat exchange. CONTENT OF THE INVENTION

[0003] In view of the above problems, the present application provides a battery device, an energy storage device and a power utilization device, which can convey fluid for heat exchange.

[0004] In a first aspect, the present application provides a battery device, which comprises:

[0005] a box body provided with an interface member in communication with the outside;

[0006] a plurality of battery monomers arranged in the box body;

[0007] a heat exchange assembly arranged in the box body, the heat exchange assembly being configured to exchange heat with the battery monomers; wherein the heat exchange assembly comprises:

[0008] a heat exchange main body having a medium flow channel inside, the heat exchange main body being arranged between adjacent battery monomers;

[0009] a current collector connected to at least one end of the heat exchange main body, the current collector being in communication with the medium flow channel;

[0010] a connecting member connecting a plurality of current collectors;

[0011] a joint configured as at least one, connecting the current collector and the interface member.

[0012] In the battery device of the present application, the fluid for heat exchange can enter and exit the current collector through the interface member and the joint, and the fluid is divided by the current collector and the connecting member to each heat exchange main body and collected from each heat exchange main body, so that the heat exchange between the battery monomers and the fluid can be realized by using the heat exchange main body.

[0013] In one embodiment, the interface member is located on a first side wall of the box body close to one end of the heat exchange main body along the extension direction.

[0014] In the above embodiment, the interface member and the joint can be easily assembled.

[0015] In one embodiment, the first side wall comprises at least one of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device.

[0016] In the above embodiment, the interface member can be arranged on at least one of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device, so that the position of the interface member can be flexibly configured.

[0017] In one embodiment, the first side wall intersects the extension direction of the heat exchange main body.

[0018] In the above embodiment, the interface member can be arranged by using the first side wall intersecting the extension direction of the heat exchange main body, so that the connection of the interface member and the joint is facilitated.

[0019] In one embodiment, the first side wall is perpendicular to the extension direction of the heat exchange main body.

[0020] In the above embodiment, the connection of the interface member and the joint can be further facilitated.

[0021] In one embodiment, the side surface of the heat exchange main body is in contact with the side surface of the battery monomer to exchange heat with the battery monomer.

[0022] In the above embodiment, the battery monomer can exchange heat with the heat exchange main body in a surface contact manner, which is beneficial to improve the heat exchange efficiency of the heat exchange main body and the battery monomer.

[0023] In one embodiment, the side surface includes a first side surface, the first side surface is the surface with the largest area among the side surfaces of the battery monomer, and the side surface of the heat exchange main body is in contact with the first side surface.

[0024] In the above embodiment, the side surface of the heat exchange main body is in contact with the surface with the largest area among the side surfaces of the battery monomer, which can further improve the heat exchange efficiency of the heat exchange main body and the battery monomer.

[0025] In one embodiment, the current collectors are located at both ends or one end of the same heat exchange main body.

[0026] In the above embodiment, the position of the current collector can be flexibly configured.

[0027] In one embodiment, the joint includes an inlet joint and an outlet joint, and the inlet joint and the outlet joint are located at the same end of the heat exchange main body along the extension direction and connected with the adjacent two current collectors.

[0028] In the above embodiment, the joint and the interface member can be connected at one end of the heat exchange main body along the extension direction, which is beneficial to improve the assembly efficiency of the joint and the interface member as a whole.

[0029] In one embodiment, the joint includes an inlet joint and an outlet joint, and the inlet joint and the outlet joint are located at both ends of the heat exchange main body along the extension direction, the inlet joint is connected with the adjacent two current collectors at one end of the heat exchange main body along the extension direction, and the outlet joint is connected with the adjacent two current collectors at the other end of the heat exchange main body along the extension direction.

[0030] In the above embodiment, the joint and the interface piece can be connected on both ends of the heat exchange main body along the extension direction, which is conducive to improving the assembly efficiency of the single joint and the single interface piece.

[0031] In one embodiment, the joint and the current collector are detachably connected.

[0032] In the above embodiment, the structure of the current collector can be simplified, and the maintenance of the current collector and the joint is facilitated.

[0033] In one embodiment, the current collector is provided with a connecting pipe, and the joint includes a first connecting portion. One of the first connecting portion and the connecting pipe is provided with a first flow channel, and at least a portion of the other is inserted into the first flow channel.

[0034] In the above embodiment, the current collector and the joint are detachably connected by insertion, which is simple and efficient in assembly.

[0035] In one embodiment, the current collector is provided with a first limiting portion, and the joint includes a second limiting portion provided on the first connecting portion. The first limiting portion and the second limiting portion abut to limit the rotation of the joint relative to the current collector.

[0036] In the above embodiment, the first limiting portion and the second limiting portion abut to limit the rotation of the joint relative to the current collector, thereby improving the reliability of the connection between the joint and the current collector to a certain extent.

[0037] In one embodiment, the first limiting portion is provided on the outer circumferential surface of the connecting pipe, the second limiting portion is provided on the outer circumferential surface of the first connecting portion, and the second limiting portion is located between the first limiting portion and the first connecting portion.

[0038] In the above embodiment, the first limiting portion and the second limiting portion can be quickly abutted when the joint and the current collector are assembled, which can improve the assembly efficiency to a certain extent.

[0039] In one embodiment, the first limiting portion includes a first plane, and the second limiting portion includes a second plane. The first plane and the second plane are parallel to each other and abut each other.

[0040] In the above embodiment, the two planes are parallel to each other and abut each other, which can improve the reliability of the abutment of the first limiting portion and the second limiting portion to a certain extent.

[0041] In one embodiment, one of the first limiting portion and the second limiting portion is provided with a notch, and at least a portion of the other is embedded in the notch.

[0042] In the above embodiment, the notch of one limiting portion can limit the other limiting portion, thereby limiting the rotation of the joint relative to the current collector.

[0043] In one embodiment, the joint comprises a shell and a sealing layer, the shell comprises a first connecting portion, and the sealing layer is arranged on a wall of the first flow channel in a circumferential direction of the first flow channel and seals the first connecting portion and the connecting pipe.

[0044] In the above embodiment, the sealing layer seals the first connecting portion and the connecting pipe, thereby improving the sealing of the joint and the current collector to a certain extent.

[0045] In one embodiment, the first connecting portion is provided with a first flow channel, two insertion openings are formed at both ends of the first connecting portion in the extension direction, and the connecting pipes of the two adjacent current collectors are inserted into the first flow channel through the two insertion openings respectively.

[0046] In the above embodiment, the first connecting portion of the joint can connect the connecting pipes of the two adjacent current collectors, so that the joint can split the fluid to the two adjacent current collectors and combine the fluid out of the two adjacent current collectors.

[0047] In one embodiment, the joint comprises a second connecting portion connected with the first connecting portion, the second connecting portion is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and the second connecting portion is connected with the interface piece.

[0048] In the above embodiment, the second flow channel can transport the fluid from the interface piece to the first flow channel and transport the fluid from the first flow channel to the interface piece.

[0049] In one embodiment, a sealing layer is arranged on a wall of the second flow channel in the circumferential direction, at least a part of the interface piece is inserted into the second flow channel, and the sealing layer seals the second connecting portion and the interface piece.

[0050] In the above embodiment, the sealing layer seals the second connecting portion and the interface piece, thereby improving the sealing of the joint and the interface piece to a certain extent.

[0051] In one embodiment, the sealing layer is connected with the connecting pipe and the interface piece in an interference fit.

[0052] In the above embodiment, the sealing layer is connected with the connecting pipe and the interface piece in an interference fit, thereby improving the sealing of the joint and the current collector and the joint and the interface piece to a certain extent.

[0053] In one embodiment, the sealing layer and the shell are manufactured by a two-color injection molding process.

[0054] In the above embodiment, the sealing layer and the shell are manufactured by a two-color injection molding process, thereby improving the manufacturing efficiency of the joint and reducing the cost to a certain extent.

[0055] In one embodiment, the insertion opening of the first flow channel is provided with an annular guide portion, the guide portion is gradually expanded in a direction away from the first connecting portion, and the guide portion is configured to guide the insertion of the connecting pipe into the first flow channel.

[0056] In the above embodiment, the guide part is configured to guide the insertion of the connecting pipe into the first flow channel, which can improve the assembly efficiency to a certain extent.

[0057] In one embodiment, the two adjacent current collectors are clamped and fixed by the joint.

[0058] In the above embodiment, the two adjacent current collectors are clamped and fixed by the joint, which can improve the reliability of the joint and the current collector connection.

[0059] In a second aspect, the application provides an energy storage device, which comprises a plurality of the battery devices of any of the above embodiments, and the battery devices are used to store or provide electric energy.

[0060] In a third aspect, the application provides a power consumption device, which comprises the battery device of any of the above embodiments or the energy storage device of any of the above embodiments.

[0061] In the energy storage device and the power consumption device of the technical solution of the application, the fluid for heat exchange can enter and exit the current collector through the interface piece and the joint, and the current collector and the connecting piece can divide the fluid into each heat exchange main body and collect the fluid flowing out of each heat exchange main body, so that the heat exchange between the battery monomer and the fluid can be realized by using the heat exchange main body.

[0062] The above description is only a summary of the technical solution of the application, in order to more clearly understand the technical means of the application, which can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following specific embodiments of the application are described. BRIEF DESCRIPTION OF DRAWINGS

[0063] 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 scope of the application. Moreover, the same reference numerals in the attached drawings indicate the same or similar elements. In the drawings:

[0064] Figure 1 Structure schematic diagram of a vehicle of some embodiments of the application;

[0065] Figure 2 Exploded structure schematic diagram of a battery device of some embodiments of the application;

[0066] Figure 3 Structure schematic diagram of a heat exchange assembly of some embodiments of the application;

[0067] Figure 4 Another structure schematic diagram of a heat exchange assembly of some embodiments of the application;

[0068] Figure 5 A schematic exploded view of a heat exchange assembly according to some embodiments of the application;

[0069] Figures 6 to 8 A perspective view of a joint according to some embodiments of the application.

[0070] Reference signs in the detailed description of the embodiments are as follows:

[0071] Vehicle 1000;

[0072] Battery device 100, controller 200, motor 300;

[0073] Box 10, first box 11, second box 12, interface piece 13, inlet interface piece 131, outlet interface piece 132;

[0074] Battery cell 20, first side surface 21;

[0075] Heat exchange assembly 30, heat exchange main body 31, current collector 32, connecting piece 33, joint 34, inlet joint 341, outlet joint 342, shell 343, sealing layer 344, first connecting part 35, first flow channel 36, insertion port 361, second limiting part 37, second plane 38, second connecting part 39, second flow channel 391;

[0076] Connecting pipe 40, first limiting part 50, first plane 51, guide part 60. DETAILED DESCRIPTION

[0077] The embodiments of the technical solutions of the application will be described in detail below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the application, and therefore only serve as examples, and cannot limit the protection scope of the application.

[0078] 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 terms used herein are only for the purpose of describing specific embodiments of the application, and are not intended to limit the application; the terms "include" and "have" and any variations thereof in the specification and claims of the application and the above description of drawings are intended to cover non-exclusive inclusion.

[0079] In the description of the embodiments of the 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 application, the meaning of "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0080] Reference to“an embodiment” herein 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 appearances of the phrase“in an embodiment” in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily mutually exclusive of one another. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiment in a manner known to those of ordinary skill in the art.

[0081] In the description of the embodiments of the application, the term“and / or” only means an association relationship of the associated objects, which can represent three relationships, for example, A and / or B, which can represent three cases of A existing alone, A and B existing together, and B existing alone. In addition, the character“ / ” herein generally represents an“or” relationship between the front and rear associated objects.

[0082] In the description of the embodiments of the application, the term“a plurality of” refers to two or more (including two), and similarly, “a plurality of groups” refers to two or more groups (including two groups), and “a plurality of pieces” refers to two or more pieces (including two pieces).

[0083] In the description of the embodiments of the 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 application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the embodiments of the application.

[0084] In the description of the embodiments of the application, unless otherwise specifically defined and limited, the technical terms“mounting”,“connection”,“connection”,“fixing” and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the internal communication of two elements or the interaction relationship of two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the application can be understood according to the specific circumstances.

[0085] If not specifically stated, all embodiments and optional embodiments of the application can be combined with each other to form new technical solutions.

[0086] If not specifically stated, all technical features and optional technical features of the application can be combined with each other to form new technical solutions.

[0087] If not otherwise specified, all steps of the present application can be performed in sequence or randomly, preferably in sequence. For example, the method comprises steps (a) and (b) means that the method can comprise steps (a) and (b) in sequence, or steps (b) and (a) in sequence. For example, it is mentioned that the method can further comprise step (c) means that step (c) can be added to the method in any order, for example, the method can comprise steps (a), (b) and (c), or steps (a), (c) and (b), or steps (c), (a) and (b), etc.

[0088] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of water power, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles, military equipment, aerospace and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0089] With the development of new energy power automobile industry, in order to pursue higher energy density, the structure design in the battery pack is more and more compact. At present, the battery monomer of the battery pack is mainly cooled by liquid cooling. Therefore, it is necessary to provide a battery device which can realize the transportation of fluid for heat exchange.

[0090] In order to solve the problem of transporting fluid for heat exchange, the present application provides a battery device, which comprises a box body, a plurality of battery monomers and a heat exchange assembly. The box body is provided with an interface communicating with the outside. The plurality of battery monomers 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 monomer. The heat exchange assembly comprises 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 is arranged between adjacent battery monomers. The current collector is connected to at least one end of the heat exchange main body, and communicates with the medium flow channel. The connecting piece connects a plurality of current collectors. The joint is configured to at least one, and connects the current collector and the interface.

[0091] In such a battery device, the fluid for heat exchange can enter and exit the current collector through the interface and the joint, and the fluid is divided by the current collector and the connecting piece to each heat exchange main body and collects the fluid flowing out of each heat exchange main body, so that the heat exchange between the battery monomer and the fluid can be realized by using the heat exchange main body.

[0092] The 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 can include a plurality of battery cells connected in series, in parallel, or in a mixed connection through a busbar component.

[0093] In some embodiments, the battery cell assembly is generally formed by arranging a plurality of battery cells.

[0094] As an example, the battery cell assembly can be a battery module formed by arranging and fixing a plurality of battery cells into a separate module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0095] In some embodiments, the battery apparatus can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0096] As an example, the battery cell assembly can be a battery module, which can be housed in the case by fixing the battery module in the case.

[0097] As an example, the battery cell assembly can also be housed in the case by directly fixing a plurality of battery cells in the case.

[0098] As an example, the case can include a first case and a second case. The first case and the second case are coupled so that an enclosed space is formed inside the case to accommodate the battery cell assembly. Here, enclosed means covered or closed, which can be sealed or unsealed. The first case can be an upper cover or a bottom plate.

[0099] As an example, the case can include an upper cover, a frame, and a bottom plate. The upper cover and the bottom plate are respectively connected to the frame so that an enclosed space is formed inside the case to accommodate the battery cell assembly.

[0100] In some embodiments, the case can be part of the chassis structure of a vehicle. For example, part of the case can be at least part of the floor of the vehicle, or part of the case can be at least part of the cross beam and the longitudinal beam of the vehicle.

[0101] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery cells, such as mobile phones, portable devices, notebook computers, electric vehicles, electric toys, electric tools, vehicles, ships, and spacecraft, such as aircraft, rockets, space shuttles, and spacecraft.

[0102] The following embodiments are described by taking a vehicle 1000 as an example for convenience of illustration.

[0103] Please refer to Figure 1 , Figure 1 A structural schematic diagram of the vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power supply of the vehicle 1000. The vehicle 1000 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 1000 during starting, navigation and driving.

[0104] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0105] Please refer to Figure 2 , Figure 2 An exploded structural schematic diagram of the battery device 100 is provided for some embodiments of the present application. The battery device 100 includes a box body 10 and a battery monomer 20, and the battery monomer 20 is contained in the box body 10. The box body 10 is used to provide a closed space for the battery monomer 20, and the box body 10 can adopt various structures. In some embodiments, the box body 10 can include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 are mutually covered. The first box body 11 and the second box body 12 jointly define a closed space for containing the battery monomer 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-shaped structure, which is covered or buckled on the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define a closed space. The first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 is covered or buckled on the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can have various shapes, such as a cylinder, a cuboid, etc.

[0106] In the battery device 100, the battery cells 20 can be multiple, and the multiple battery cells 20 can be connected in series, in parallel, or in a mixed connection. The mixed connection means that the multiple battery cells 20 are connected in series and in parallel. The multiple battery cells 20 can be directly connected in series, in parallel, or in a mixed connection, and the whole of the multiple battery cells 20 is accommodated in the box 10. Of course, the battery device 100 can also be that the multiple battery cells 20 are first connected in series, in parallel, or in a mixed connection to form a battery module, and the multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and are accommodated in the box 10. The battery device 100 can also include other structures, for example, the battery device 100 can also include a current collecting component for realizing the electrical connection between the multiple battery cells 20.

[0107] In the embodiments of the present application, the battery cell 20 can be a secondary battery, which means that the battery cell 20 can be activated by charging after discharging to continue to be used. The battery cell 20 can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium-sulfur battery, a magnesium ion battery, a nickel-hydrogen battery, a nickel-cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto. The battery cell 20 can be in the shape of a cylinder, a flat body, a cuboid, or other shapes, etc.

[0108] Please refer to Figures 2 to 8 The embodiments of the present application provide a battery device 100. The battery device 100 includes a box 10, multiple battery cells 20, and a heat exchange assembly 30. The box 10 is provided with an interface piece 13 communicating with the outside. The multiple battery cells 20 are arranged in the box 10. The heat exchange assembly 30 is arranged in the box 10, and the heat exchange assembly 30 is configured to exchange heat with the battery cells 20.

[0109] The heat exchange assembly 30 includes a heat exchange main body 31, a current collector 32, a connecting piece 33, and a joint 34. The heat exchange main body 31 has a medium flow channel (not shown in the figure) inside, and the heat exchange main body 31 is arranged between adjacent battery cells 20. The current collector 32 is connected to at least one end of the heat exchange main body 31, and the current collector 32 communicates with the medium flow channel. The connecting piece 33 connects multiple current collectors 32. The joint 34 is configured to be at least one, and the joint 34 connects the current collector 32 and the interface piece 13.

[0110] The box 10 can protect and accommodate the battery cells 20, the heat exchange assembly 30, and other components. The other components of the battery device 100 include but are not limited to a high-voltage box, a battery management system, a current collecting component, a sampling assembly, etc. The material of the box 10 includes but is not limited to metal, composite material, etc. The shape of the box 10 includes but is not limited to a regular or irregular shape such as a cuboid.

[0111] Optionally, please refer to Figure 2In one embodiment, the box 10 comprises a first box 11 and a second box 12, the second box 12 is a hollow structure with one end open, and the first box 11 is a plate structure, the first box 11 is covered or buckled on the open side of the second box 12, so that the first box 11 and the second box 12 jointly define a closed space.

[0112] The battery cell 20 can be the smallest unit of storing electrical energy, and a plurality of battery cells 20 can be electrically connected in series, parallel, or mixed connection. Mixed connection can mean that there are both series and parallel connections between a plurality of battery cells 20. Optionally, the bottom surface of the battery cell 20 can be connected to the bottom wall surface of the box 10 through insulating glue to fix the battery cell 20.

[0113] Optionally, a plurality of battery cells 20 can be arranged along a first direction to form a battery module, and a plurality of battery modules can be arranged in the box 10 along the first direction and / or a second direction, the first direction being perpendicular to the second direction. In one embodiment, the first direction can be the front-rear direction of the vehicle, and the second direction can be the left-right direction of the vehicle. In one embodiment, the first direction can be the left-right direction of the vehicle, and the second direction can be the front-rear direction of the vehicle.

[0114] The heat exchange assembly 30 is arranged in the box 10, and the box 10 can protect and accommodate the heat exchange assembly 30. The heat exchange assembly 30 can exchange heat with the battery cell 20, so that the battery cell 20 works in a normal temperature range.

[0115] The heat exchange body 31 has a medium flow channel inside, the medium flow channel can pass into a heat exchange fluid, and the fluid can exchange heat with the battery cell 20 through the heat exchange body 31, thereby heating or cooling the battery cell 20. The heat exchange body 31 is arranged between two adjacent battery cells 20, and the heat exchange body 31 can be in contact with the two adjacent battery cells 20. On the one hand, one heat exchange body 31 can exchange heat with two adjacent battery cells 20 at the same time, which can reduce the number of heat exchange bodies 31, reduce the cost, and simplify the structure of the battery device 100. On the other hand, the heat exchange body 31 can also physically separate the two adjacent battery cells 20, and when one of the battery cells 20 occurs thermal runaway, it can prevent the thermal runaway from spreading to the adjacent battery cell 20 to some extent, thereby improving the reliability of the battery device 100. The fluid includes but is not limited to water, ethylene glycol, and mixtures thereof (such as ethylene glycol-water mixture).

[0116] The medium flow channel in the heat exchange main body 31 can be single or multiple. Multiple medium flow channels can increase the area of fluid heat exchange with the battery cell 20, thereby improving the heat exchange efficiency of the fluid with the battery cell 20 to a certain extent. Single medium flow channel can make the structure of the heat exchange main body 31 simple and easy to manufacture. The shape of the medium flow channel includes but is not limited to meandering, linear and the like. Alternatively, the linear medium flow channel can extend along the length direction of the heat exchange main body 31, and multiple linear medium flow channels are arranged parallel to each other.

[0117] The current collector 32 connects at least one end of the heat exchange main body 31. Alternatively, in an embodiment, the battery cell 20 is in the shape of a cuboid, and the heat exchange main body is in the shape of a cuboid adapted to the shape of the battery cell 20. The current collector 32 can connect at least one end of the heat exchange main body 31 in the length direction. In an embodiment, the current collector 32 connects one end of the heat exchange main body 31. In an embodiment, two current collectors 32 are connected to the two ends of the heat exchange main body 31, respectively.

[0118] The current collector 32 communicates with the medium flow channel, so that the fluid can flow from the current collector 32 into the medium flow channel, and the fluid can flow from the medium flow channel into the current collector 32. The current collector 32 is internally provided with a current collecting flow channel communicating with the medium flow channel, which can be used for fluid distribution and flow convergence. When distributing, the fluid flows from the interface piece 13 into the connector 34, and the current collector 32 can distribute the fluid flowing into the current collector 32 from the connecting piece 33 or the connector 34 into the same or different medium flow channels in the heat exchange main body 31 through the current collecting flow channel, so that the fluid flows into the medium flow channel to exchange heat with the battery cell 20. When converging, the current collector 32 can guide the fluid after heat exchange to the connecting piece 33 or the connector 34 through the current collecting flow channel, so that the fluid can flow back to the interface piece 13 to form a circulating flow of the fluid.

[0119] The connecting piece 33 can connect multiple current collectors 32. Specifically, in an embodiment, one connecting piece 33 can connect two adjacent current collectors 32, so that the fluid can flow from one current collector 32 into the adjacent current collector 32 through the connecting piece 33. The connecting piece 33 can include but is not limited to a straight pipe.

[0120] Optionally, in one embodiment, the joint 34 is configured as a single joint 34 connecting the manifold 32 and the interface 13, so that the fluid can flow into the manifold 32 through the interface 13 and the joint 34, and / or the fluid can flow into the interface 13 through the joint 34 after flowing out of the manifold 32. Optionally, in one embodiment, the joint 34 is configured as a plurality of joints 34, each joint 34 connecting a corresponding manifold 32 and the interface 13, so that the fluid can flow from the interface 13 into the manifold 32 through the joint 34, and the fluid can flow from the manifold 32 into the interface 13 through the joint 34. Optionally, the number of interfaces 13 can be a plurality, one interface 13 connecting one or several joints 34. Optionally, the number of interfaces 13 is a single, a single interface 13 connecting all joints 34.

[0121] When the fluid flows from the heat exchange body 31 into the manifold 32 connected with the joint 34, the fluid can flow into the interface 13 through the joint 34. When the fluid flows from the interface 13 into the joint 34 connected with the manifold 32, the fluid can flow into the manifold 32 through the joint 34.

[0122] Specifically, when the fluid flows from the interface 13 into the joint 34, the fluid can flow into the manifold 32 connected with the joint 34 through the joint 34, on the one hand, the manifold 32 connected with the joint 34 can make the fluid flow into the medium flow channel, on the other hand, the manifold 32 connected with the joint 34 can make the fluid flow into the adjacent another manifold 32 through the connecting piece 33, so as to realize that the fluid flows into all the medium channels of the heat exchange bodies 31.

[0123] When the fluid flows back from the joint 34 to the interface 13, on the one hand, the fluid flows out of the medium flow channel into the manifold 32, and flows into the adjacent another manifold 32 through the connecting piece 33 connected with the manifold 32 until it flows into the manifold 32 connected with the joint 34, on the other hand, the fluid flows out of the medium channel into the manifold 32 connected with the joint 34. The fluid flows from the manifold 32 connected with the joint 34 into the interface 13.

[0124] In summary, in the battery device 100 of the technical scheme of the present application, the fluid for heat exchange can enter the manifold 32 through the interface 13 and the joint 34, and the manifold 32 and the connecting piece 33 can divide the fluid to flow into each heat exchange body 31 and collect the fluid flowing out of each heat exchange body 31 to the joint 34, so as to realize heat exchange between the battery monomer 20 and the fluid by using the heat exchange body 31.

[0125] Further, the joint 34 is connected with the manifold 32, and the joint 34 and the manifold 32 can be separate, so as to simplify the structure of the manifold 32, to a certain extent, to reduce the manufacturing difficulty and cost of the manifold 32, and to improve the problems of backflow and excessive flow resistance in the flow channel.

[0126] According to some embodiments of the present application, optionally, please combine Figure 2 and Figure 3 The interface piece 13 is located on the first side wall of the box body 10 close to one end of the heat exchange main body 31 along the extension direction.

[0127] In the above embodiments, the interface piece 13 and the joint 34 can be easily assembled.

[0128] Specifically, in one embodiment, the extension direction of the heat exchange main body 31 is the length direction of the heat exchange main body 31, the current collector 32 is arranged at one end or both ends of the heat exchange main body 31 along the length direction, and the joint 34 is connected to the current collector 32. The first side wall of the box body 10 is close to one end of the heat exchange main body 31 along the extension direction, and the interface piece 13 is located on the first side wall, so that the distance between the interface piece 13 and the joint 34 is small, the joint 34 and the interface piece 13 are easily assembled, the length of the corresponding connecting pipe can be reduced, the cost can be reduced, the cold or heat loss on the flow path from the interface piece 13 to the joint 34 can be reduced, and the cooling or heating efficiency of the battery monomer 20 can be improved.

[0129] Optionally, in one embodiment, when the battery device 100 is assembled on the vehicle 1000, the extension direction of the heat exchange main body 31 is the front-rear direction of the vehicle. Optionally, in one embodiment, when the battery device 100 is assembled on the vehicle 1000, the extension direction of the heat exchange main body 31 is the left-right direction of the vehicle.

[0130] According to some embodiments of the present application, optionally, please combine Figure 2 The first side wall includes at least one of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100.

[0131] In the above embodiments, the interface piece 13 can be arranged on at least one of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100, so that the position of the interface piece 13 can be flexibly configured.

[0132] Specifically, the front side wall and the rear side wall of the battery device 100 can be two side walls of the box body 10 along the front-rear direction of the vehicle, and the left side wall and the right side wall of the battery device 100 can be two side walls of the box body 10 along the left-right direction of the vehicle.

[0133] In one embodiment, the first side wall includes the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100. The interface piece 13 can be arranged on the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100.

[0134] In one embodiment, the first side wall includes any one, any two or any three of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100. The interface 13 can be arranged on any one, any two or any three of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100.

[0135] In one embodiment, the first side wall includes any one, any two or any three of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100. The interface 13 can be arranged on any one, any two or any three of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device 100. Figure 2 , the first side wall includes the left side wall and the right side wall of the battery device 100, and the interface 13 is arranged on the left side wall and the right side wall, respectively.

[0136] According to some embodiments of the present application, optionally, in combination with Figure 2 and Figure 3 , the first side wall intersects the extension direction of the heat exchange body 31.

[0137] In the above embodiments, the interface 13 can be arranged on the first side wall intersecting the extension direction of the heat exchange body 31, which facilitates the connection of the interface 13 and the connector 34.

[0138] Specifically, the interface 13 is arranged on the first side wall. The current collector 32 is connected to at least one end of the heat exchange body 31, so that the current collector 32 is located on at least one end of the heat exchange body 31 along the extension direction, and the first side wall is a side wall of the box body 10 close to one end of the heat exchange body 31 along the extension direction. The first side wall intersects the extension direction of the heat exchange body 31, so that the interface 13 on the first side wall is close to the connector 34 connected to the current collector 32, which facilitates the connection of the interface 13 and the connector 34, and is beneficial to provide assembly efficiency.

[0139] According to some embodiments of the present application, optionally, in combination with Figure 2 and Figure 3 , the first side wall is perpendicular to the extension direction of the heat exchange body 31.

[0140] In the above embodiments, the connection of the interface 13 and the connector 34 can be further facilitated.

[0141] Specifically, the first side wall is perpendicular to the extension direction of the heat exchange body 31, so that the first side wall is close to one end of the heat exchange body 31, and the interface 13 on the first side wall is also close to the connector 34 connected to the current collector 32, thereby further facilitating the connection of the interface 13 and the connector 34.

[0142] In one embodiment, in combination with Figure 3 , the current collector 32 is arranged on both ends of the heat exchange body 31 close to the first side wall along the extension direction, the first side wall is the left side wall and the right side wall of the battery device 100, the extension direction of the heat exchange body 31 is the left-right direction of the vehicle, and the interface 13 is arranged on the left side wall and the right side wall of the battery device 100.

[0143] In one embodiment, the current collector 32 is arranged at one end of the heat exchange body 31 close to the first side wall in the extending direction, the first side wall is the left side wall or the right side wall of the battery device 100, and the extending direction of the heat exchange body 31 is the left-right direction of the vehicle. The interface member 13 is arranged on the left side wall or the right side wall of the battery device 100.

[0144] According to some embodiments of the present application, the side surface of the heat exchange body 31 is in contact with the side surface of the battery cell 20 to exchange heat with the battery cell 20.

[0145] In the above embodiment, the battery cell 20 can exchange heat with the heat exchange body 31 in a surface contact manner, which is beneficial to improve the heat exchange efficiency of the heat exchange body 31 and the battery cell 20.

[0146] Specifically, the battery cell 20 can include a shell and an electrode assembly, the electrode assembly is arranged in the shell, and an electrode terminal electrically connected to the electrode assembly is arranged on the shell. The side surface of the heat exchange body 31 can be in contact with the side surface of the shell.

[0147] Optionally, in one embodiment, the shell is in the shape of a cuboid, and the heat exchange body 31 is in the shape of a cuboid matched with the shape of the shell. The side surface of the heat exchange body 31 is in contact with the side surface of the shell, so that the battery cell 20 exchanges heat with the fluid through the shell and the heat exchange body 31. The contact area of the side surface and the side surface is large, and the heat transfer is fast, which is beneficial to provide the heat exchange efficiency of the heat exchange body 31 and the battery cell 20.

[0148] The material of the heat exchange body 31 includes but is not limited to metal, and the material of the shell of the battery cell 20 includes but is not limited to metal. The material of the heat exchange body 31 and the material of the shell of the battery cell 20 can be the same or different.

[0149] According to some embodiments of the present application, the side surface of the heat exchange body 31 is in contact with the side surface of the battery cell 20 to exchange heat with the battery cell 20. Figure 2 and Figure 3 The side surface includes a first side surface 21, the first side surface 21 is the surface with the largest area among the side surfaces of the battery cell 20, and the side surface of the heat exchange body 31 is in contact with the first side surface 21.

[0150] In the above embodiment, the side surface of the heat exchange body 31 is in contact with the surface with the largest area among the side surfaces of the battery cell 20, which can further improve the heat exchange efficiency of the heat exchange body 31 and the battery cell 20.

[0151] Optionally, in an embodiment, the battery cell 20 can be a square cell. The housing of the battery cell 20 is cuboid. The first side surface 21 is the surface with the largest area among the side surfaces of the housing, which can also be referred to as the large surface. The first side surface 21 has the largest area and accumulates the most heat of the battery cell 20. The side surface of the heat exchange main body 31 is in contact with the first side surface 21, so that more heat can be timely transferred to the heat exchange main body 31 and exchanged with the fluid in the heat exchange main body 31, thereby further improving the heat exchange efficiency of the heat exchange main body 31 and the battery cell 20.

[0152] Optionally, in an embodiment, please refer to Figure 2 and Figure 3 , one heat exchange main body 31 is in contact with the first side surface 21 of two adjacent battery cells 20 along the two side surfaces of the heat exchange main body 31 in the arrangement direction of the plurality of battery cells 20 (such as the front-rear direction shown in Figure 2 ), so that the same heat exchange main body 31 can exchange heat with two adjacent battery cells 20 at the same time, which is conducive to improving the heat exchange efficiency of the heat exchange main body 31 and the battery cell 20.

[0153] According to some embodiments of the present application, optionally, please refer to Figure 3 or Figure 4 , the current collector 32 is located at one end or both ends of the same heat exchange main body 31.

[0154] In the above embodiments, the position of the current collector 32 can be flexibly configured.

[0155] Specifically, the position of the current collector 32 can be configured according to factors including but not limited to the space configuration, size, customer demand, heat exchange performance, etc. in the box 10.

[0156] Optionally, in an embodiment, please refer to Figure 3 , the current collector 32 is located at both ends of the same heat exchange main body 31. In an embodiment, the extension direction of the heat exchange main body 31 is the left-right direction of the vehicle, and the current collector 32 is located at the left end and the right end of the heat exchange main body 31. The interface piece 13 is located on the left side wall and the right side wall of the box 10, and the connector 34 is connected with the interface piece 13, so that the fluid can flow from the current collector 32 to the interface piece 13 through the connector 34, and the fluid can flow from the interface piece 13 to the current collector 32 through the connector 34. The two current collectors 32 at both ends of the same heat exchange main body 31, one current collector 32 can be used as the current collector 32 for fluid inflow, and the other current collector 32 can be used as the current collector 32 for fluid outflow.

[0157] One connecting piece 33 connects two current collectors 32 at the same end of adjacent heat exchange main bodies 31. The connecting piece 33 can make the fluid flow between the two adjacent current collectors 32.

[0158] Optionally, in an embodiment, please refer toFigure 4 and Figure 5 The current collector 32 is located at one end of the heat exchange body 31 along the extension direction. In an embodiment, the extension direction of the heat exchange body 31 is the left-right direction of the vehicle, the current collector 32 is located at the left end or the right end of the heat exchange body 31, the interface piece 13 is located on the left side wall or the right side wall of the box body 10, and the connector 34 is connected with the interface piece 13, so that the fluid can flow from the current collector 32 to the interface piece 13 through the connector 34, and the fluid can flow from the interface piece 13 to the current collector 32 through the connector 34. The two connectors 33 can connect two current collectors 32 on the same end of two adjacent heat exchange bodies 31. One connector 33 can be a connector 33 for fluid flowing into the current collector 32, and the other connector 33 can be a connector 33 for fluid flowing out of the current collector 32.

[0159] According to some embodiments of the present application, optionally, in combination with Figure 3 and Figure 4 The connector 34 includes an inlet connector 341 and an outlet connector 342, and the inlet connector 341 and the outlet connector 342 are located at the same end of the heat exchange body 31 along the extension direction and are connected with two adjacent current collectors 32.

[0160] In the above embodiments, the connector 34 and the interface piece 13 can be connected at one end of the heat exchange body 31 along the extension direction, which is beneficial to improving the assembly efficiency of the connector 34 and the interface piece 13 as a whole.

[0161] It should be noted that Figure 4 Only one connector 34 is shown at one end of the heat exchange body 31 along the extension direction, and the other connector 34 is not shown. Figure 3 In order to illustrate that the connector 34 includes an inlet connector 341 and an outlet connector 342. It can be understood that two connectors 34 can be connected to the same end of the same heat exchange body 31 or the same end of different heat exchange bodies 31. For example, the inlet connector 341 and the outlet connector 342 are connected to the left end of the same heat exchange body 31. For another example, the inlet connector 341 is connected to the left end of one heat exchange body 31, and the outlet connector 342 is connected to the left end of another heat exchange body.

[0162] The interface piece 13 includes an inlet interface piece 131 and an outlet interface piece 132, the inlet interface piece 131 is connected with the inlet connector 341, and the outlet interface piece 132 is connected with the outlet connector 342. The inlet interface piece 131 is used to introduce fluid into the inlet connector 341, so that the fluid can flow into different heat exchange bodies 31 through the current collector 32 and the connector 33, thereby exchanging heat with the battery monomer 20.

[0163] The outlet interface 132 is configured to receive fluid flowing out of the outlet joint 342, so that the fluid can flow to the temperature adjustment unit through the outlet joint 342 and the outlet interface 132. The temperature adjustment unit can cool and heat the fluid, and the cooled or heated fluid can flow back to the heat exchange main body 31 through the inlet interface 131, the inlet joint 341, the flow collector 32 and the connecting piece 33.

[0164] Please refer to Figure 3 , the inlet joint 341 and the outlet joint 342 are connected with the adjacent two flow collectors 32. Therefore, two joints 34 and two interfaces 13 can be connected on one end of the heat exchange main body 31 along the extension direction, which is conducive to improving the assembly efficiency of the joints 34 and the interfaces 13 as a whole.

[0165] According to some embodiments of the present application, please refer to Figure 3 , the joint 34 includes the inlet joint 341 and the outlet joint 342, and the inlet joint 341 and the outlet joint 342 are respectively located at two ends of the heat exchange main body 31 along the extension direction. The inlet joint 341 is connected with the adjacent two flow collectors 32 on one end of the heat exchange main body 31 along the extension direction, and the outlet joint 342 is connected with the adjacent two flow collectors 32 on the other end of the heat exchange main body 31 along the extension direction.

[0166] In the above embodiments, the joint 34 and the interface 13 can be connected on the two ends of the heat exchange main body 31 along the extension direction, which is conducive to improving the assembly efficiency of the single joint 34 and the single interface 13.

[0167] Specifically, the interface 13 includes the inlet interface 131 and the outlet interface 132, the inlet interface 131 is connected with the inlet joint 341, and the outlet interface 132 is connected with the outlet joint 342. The inlet interface 131 is configured to supply fluid to the inlet joint 341, so that the fluid can flow into different heat exchange main bodies 31 through the flow collector 32 and the connecting piece 33, thereby exchanging heat with the battery monomer 20.

[0168] The outlet interface 132 is configured to receive fluid flowing out of the outlet joint 342, so that the fluid can flow to the temperature adjustment unit through the outlet joint 342 and the outlet interface 132. The temperature adjustment unit can cool and heat the fluid, and the cooled or heated fluid can flow back to the heat exchange main body 31 through the inlet interface 131, the inlet joint 341, the flow collector 32 and the connecting piece 33.

[0169] Please refer to Figure 3 , the inlet joint 341 is connected with the adjacent two flow collectors 32 on one end (such as the left end shown in Figure 3 ) of the heat exchange main body 31 along the extension direction. Therefore, on one end of the heat exchange main body 31, the inlet joint 341 can be connected with the inlet interface 131, and the outlet interface 132 and the outlet joint 342 can avoid occupying additional operation space, which is conducive to improving the assembly efficiency of the inlet interface 131 and the inlet joint 341.

[0170] Please combine Figure 3 The other end of the outlet joint 342 and the heat exchange body 31 along the extension direction (e.g. Figure 3 The collector 32 is connected to the heat exchanger body 31 (shown on the right end). Therefore, at the other end of the heat exchange body 31, the outlet connector 342 can be connected to the outlet fitting 132, which can avoid the inlet fitting 131 and the inlet connector 341 occupying additional operating space and is conducive to improving the assembly efficiency of the outlet fitting 132 and the outlet connector 342.

[0171] According to some embodiments of this application, optionally, please refer to... Figures 3 to 5 The connector 34 is detachably connected to the current collector 32.

[0172] In the above embodiments, the structure of the current collector 32 can be simplified, and the maintenance of the current collector 32 and the connector 34 can be facilitated.

[0173] Specifically, the connector 34 and the collector 32 are detachably connected. The connector 34 and the collector 32 can be separate components, manufactured separately and then assembled together. This simplifies the structure of the collector 32, reduces its manufacturing difficulty and cost to some extent, and also improves problems such as backflow and excessive flow resistance in the flow channel.

[0174] Detachable connection methods include, but are limited to, bolt connection, snap-fit ​​connection, plug-in connection, clamping, etc.

[0175] According to some embodiments of this application, optionally, please refer to... Figure 5 The collector 32 is provided with a connecting pipe 40, and the connector 34 includes a first connecting part 35. One of the first connecting part 35 and the connecting pipe 40 is provided with a first flow channel 36, and at least a part of the other is inserted into the first flow channel 36.

[0176] In the above embodiments, the current collector 32 can be detachably connected to the connector 34 by plugging in, which is simple to assemble and highly efficient.

[0177] Optionally, in one embodiment, please combine Figures 5 to 8 The first connecting part 35 is provided with a first flow channel 36, and at least a portion of the connecting pipe 40 is inserted into the first flow channel 36. The connecting pipe 40 can be completely inserted into the first flow channel 36 or partially inserted into the first flow channel 36. After the connecting pipe 40 is inserted into the first flow channel 36, the first connecting part 35 can clamp the connecting pipe 40.

[0178] The shape of the first flow channel 36 is adapted to the shape of the connecting pipe 40, making the connection between the connecting pipe 40 and the first connecting part 35 tighter, and improving the sealing performance of the connecting pipe 40 and the first connecting part 35 to a certain extent, preventing fluid leakage. Figure 5In some embodiments, the first flow channel 36 and the connecting pipe 40 are both cylindrical.

[0179] In assembly, the connecting pipe 40 can be inserted into the first flow channel 36 to complete the assembly of the current collector 32 and the connector 34.

[0180] Optionally, in an embodiment, the connecting pipe 40 is provided with the first flow channel 36, and at least a portion of the first connecting portion 35 is inserted into the first flow channel 36.

[0181] According to some embodiments of the present application, optionally, in combination with Figures 4 to 8 The current collector 32 is provided with a first limiting portion 50, and the connector 34 includes a second limiting portion 37 provided on the first connecting portion 35, and the first limiting portion 50 and the second limiting portion 37 abut to limit the rotation of the connector 34 relative to the current collector 32.

[0182] In the above embodiment, the first limiting portion 50 and the second limiting portion 37 abut to limit the rotation of the connector 34 relative to the current collector 32, so that the reliability of the connection between the connector 34 and the current collector 32 can be improved to a certain extent.

[0183] In an embodiment, in combination with Figure 5 The first flow channel 36 and the connecting pipe 40 are both cylindrical, and after the connecting pipe 40 is inserted into the first flow channel 36, the cylindrical shape makes it easy for the connecting pipe 40 and the connector 34 to rotate relative to each other. By abutting the first limiting portion 50 on the current collector 32 and the second limiting portion 37 on the first connecting portion 35 to limit the rotation of the connector 34 relative to the current collector 32, the situation that the connection between the connecting pipe 40 and the first connecting portion 35 is loosened due to the rotation of the connector 34 relative to the current collector 32 during use of the battery device 100, which causes fluid leakage, can be avoided to a certain extent, so that the reliability of the connection between the connector 34 and the current collector 32 can be improved.

[0184] According to some embodiments of the present application, optionally, in combination with Figure 4 and Figure 5 The first limiting portion 50 is provided on the outer circumferential surface of the connecting pipe 40, the second limiting portion 37 is provided on the outer circumferential surface of the first connecting portion 35, and the second limiting portion 37 is located between the first limiting portion 50 and the first connecting portion 35.

[0185] In the above embodiment, the first limiting portion 50 and the second limiting portion 37 can be quickly abutted during the assembly of the connector 34 and the current collector 32, so that the assembly efficiency can be improved to a certain extent.

[0186] Specifically, the first limiting portion 50 and the connecting pipe 40 are located on the side of the current collector 32 facing the joint 34, the first limiting portion 50 is arranged outside the outer circumferential surface of the connecting pipe 40, and the first limiting portion 50 is spaced from the outer circumferential surface of the connecting pipe 40. The second limiting portion 37 is arranged on the outer circumferential surface of the first connecting portion 35. During assembly, the connecting pipe 40 is inserted into the first flow channel 36 in alignment with the first flow channel 36 of the first connecting portion 35. During the insertion process, the second limiting portion 37 and the pipe wall of the first connecting portion 35 gradually enter the gap between the first limiting portion 50 and the outer circumferential surface of the connecting pipe 40. After the connecting pipe 40 is inserted in place, one side surface of the second limiting portion 37 can abut against one side surface of the first limiting portion 50, thereby limiting the rotation of the joint 34 relative to the current collector 32.

[0187] According to some embodiments of the present application, optionally, in combination with Figure 4 and Figure 5 , the first limiting portion 50 comprises a first plane 51, and the second limiting portion 37 comprises a second plane 38, the first plane 51 and the second plane 38 are parallel to each other and abut against each other.

[0188] In the above embodiments, by abutting against each other through the two parallel planes, the reliability of the abutment between the first limiting portion 50 and the second limiting portion 37 can be improved to a certain extent.

[0189] The shape of the first plane 51 includes but is not limited to regular or irregular shapes such as square and circle, and the shape of the second plane 38 includes but is not limited to regular or irregular shapes such as square and circle. The shape of the first plane 51 can be the same as or different from the shape of the second plane 38.

[0190] Optionally, in combination with Figure 4 and Figure 5 , the first plane 51 and the second plane 38 are square planes, and the two square planes are parallel to each other and abut against each other. The first limiting portion 50 and the second limiting portion 37 limit the rotation of the joint 34 relative to the current collector 32 through the abutment of the planes, the abutment area is large, and the reliability of the abutment between the first limiting portion 50 and the second limiting portion 37 can be improved to a certain extent.

[0191] According to some embodiments of the present application, optionally, one of the first limiting portion 50 and the second limiting portion 37 is provided with a notch (not shown), and at least a part of the other is embedded in the notch.

[0192] In the above embodiments, the other limiting portion can be limited through the notch of one limiting portion, thereby limiting the rotation of the joint 34 relative to the current collector 32.

[0193] Optionally, in one embodiment, the first limiting part 50 is provided with a gap, and a part or the whole of the second limiting part 37 is embedded in the gap, so that the first limiting part 50 and the second limiting part 37 abut to limit the rotation of the joint 34 relative to the current collector 32.

[0194] Optionally, in one embodiment, the second limiting part 37 is provided with a gap, and a part or the whole of the first limiting part 50 is embedded in the gap, so that the first limiting part 50 and the second limiting part 37 abut to limit the rotation of the joint 34 relative to the current collector 32.

[0195] In the process of assembling the joint 34 and the current collector 32, one of the limiting parts can be clamped into the gap to limit the rotation of the joint 34 relative to the current collector 32, so that the assembly of the joint 34 and the current collector 32 is realized at the same time, and the abutment of the first limiting part 50 and the second limiting part 37 is realized.

[0196] According to some embodiments of the present application, optionally, please refer to Figures 5 to 8 The joint 34 comprises a shell 343 and a sealing layer 344, the shell 343 comprises the first connecting part 35, and the sealing layer 344 is arranged on the wall surface of the first flow channel 36 in the circumferential direction of the first flow channel 36, and the sealing layer 344 seals the connection between the first connecting part 35 and the connecting pipe 40.

[0197] In the above embodiment, the sealing layer 344 seals the connection between the first connecting part 35 and the connecting pipe 40, which improves the connection sealing performance of the joint 34 and the current collector 32 to a certain extent.

[0198] Optionally, in one embodiment, please refer to Figure 4 and Figures 5 to 8 The first connecting part 35 is provided with the first flow channel 36, and at least a part of the connecting part is inserted into the first flow channel 36. The material of the shell 343 includes but is not limited to polydodecanamide (PA12), and the material of the sealing layer 344 includes but is not limited to thermoplastic elastomer (TPS). The outer shell 343 has a relatively large hardness, which can play a protective and anti-wear role, and the shell 343 has a certain toughness and strength. The inner sealing layer 344 is relatively soft and can play a sealing role, which can avoid the leakage of fluid between the joint 34 and the current collector 32 to a certain extent.

[0199] A sealing layer 344 is disposed on the wall surface of the first flow channel 36 in the circumferential direction, forming a ring of sealing layer 344 on the wall surface of the first flow channel 36 in the circumferential direction. Optionally, the outer diameter of the connecting pipe 40 is larger than the inner diameter of the sealing layer 344. After the connecting pipe 40 is inserted into the first flow channel 36, the sealing layer 344 can undergo elastic deformation and be sandwiched between the outer circumferential surface of the connecting pipe 40 and the wall surface of the first flow channel 36. The sealing layer 344 can tightly fit the connecting pipe 40, thereby sealing the connection between the first connecting part 35 and the connecting pipe 40.

[0200] Optionally, in one embodiment, the connecting pipe 40 is provided with a first flow channel 36, and at least a portion of the first connecting portion 35 is inserted into the first flow channel 36. After the first connecting portion 35 is inserted into the first flow channel 36, the sealing layer 344 can be sandwiched between the outer peripheral surface of the first connecting portion 35 and the wall surface of the first flow channel 36, thereby sealing the connection between the first connecting portion 35 and the connecting pipe 40.

[0201] According to some embodiments of this application, optionally, please refer to... Figure 4 The first connecting part 35 is provided with a first flow channel 36. The first flow channel 36 has two insertion ports 361 at both ends of the extending direction of the first connecting part 35. The connecting pipes 40 of two adjacent collectors 32 are respectively inserted into the first flow channel 36 through the two insertion ports 361.

[0202] In the above embodiments, the first connecting part 35 of the connector 34 can connect to the connecting pipe 40 of two adjacent collectors 32, so that the fluid can be diverted to the two adjacent collectors 32 and the fluid flowing out of the two adjacent collectors 32 can be merged into the connector 34.

[0203] The first flow channel 36 has two insertion ports 361 at both ends of the first connecting part 35 extending in the direction of extension. The connecting pipes 40 on the two adjacent collectors 32 can be inserted into the first flow channel 36 through the two insertion ports 361 respectively, so that the first connecting part 35 connects the two adjacent collectors 32.

[0204] Specifically, in one embodiment, please refer to... Figures 4 to 8 and Figures 6 to 8 The interface 13 is connected to the connector 34. When fluid flows in, it can flow from the interface 13 into the connector 34, and then through the first flow channel 36 of the first connection portion 35 to two adjacent collectors 32 connected thereto. From there, it flows into the medium flow channel of the heat exchange body 31 and through the connector 33 to another collector 32. When fluid flows out, it can flow from the heat exchange body 31 into the collectors 32, and the connector 34 can collect the fluid flowing out of the two adjacent collectors 32 connected thereto through the first flow channel 36 back to the interface 13.

[0205] According to some embodiments of the present application, as shown in FIG. 1, the joint 34 comprises a second connecting portion 39 connected with the first connecting portion 35, the second connecting portion 39 is provided with a second flow channel 391, the second flow channel 391 is in communication with the first flow channel 36, and the second connecting portion 39 is connected with the interface piece 13.

[0206] In the above embodiment, the second flow channel 391 can transport fluid from the interface piece 13 to the first flow channel 36, and transport fluid from the first flow channel 36 to the interface piece 13.

[0207] In one embodiment, as shown in FIG. 1, Figure 4 the second connecting portion 39 is connected with the outer circumferential surface of the first connecting portion 35, so that the joint 34 forms a tee joint configuration. The second connecting portion 39 is connected with the interface piece 13. When fluid flows in, the second flow channel 391 can transport fluid flowing in from the interface piece 13 to the first flow channel 36, and then the fluid is divided into two adjacent collecting bodies 32 through the first flow channel 36, and then the fluid is transported to the heat exchange main body 31 through the two adjacent collecting bodies 32 and the connecting piece 33 to the next collecting body 32. When fluid flows out, the first flow channel 36 can collect fluid flowing out from the two adjacent collecting bodies 32 and transport the fluid to the second flow channel 391. The second flow channel 391 transports the fluid flowing out from the first flow channel 36 to the interface piece 13.

[0208] According to some embodiments of the present application, as shown in FIG. 1, Figure 5 the wall surface of the second flow channel 391 is provided with a sealing layer 344 in the circumferential direction, at least a part of the interface piece 13 is inserted into the second flow channel 391, and the sealing layer 344 sealingly connects the second connecting portion 39 and the interface piece 13.

[0209] In the above embodiment, the sealing layer 344 sealingly connects the second connecting portion 39 and the interface piece 13, which improves the sealing performance of the connection between the joint 34 and the interface piece 13 to a certain extent.

[0210] The inner sealing layer 344 can play a sealing role, which can avoid fluid leakage between the joint 34 and the interface piece 13 to a certain extent.

[0211] The sealing layer 344 is arranged on the wall surface of the second flow channel 391 in the circumferential direction of the second flow channel 391, so that the wall surface of the second flow channel 391 forms a ring of sealing layers 344 in the circumferential direction. Optionally, the outer diameter of the interface piece 13 is greater than the inner diameter of the ring of sealing layers 344. After the interface piece 13 is inserted into the second flow channel 391, the sealing layer 344 can be clamped between the outer circumferential surface of the interface piece 13 and the wall surface of the second flow channel 391, and the sealing layer 344 can tightly fit the interface piece 13, so as to sealingly connect the second connecting portion 39 and the interface piece 13.

[0212] According to some embodiments of the present application, as shown in FIG. 1, Figures 6 to 8 andFigures 4 to 8 The sealing layer 344 is in interference fit with the connecting pipe 40 and the interface 13.

[0213] In the above embodiments, the connection between the joint 34 and the current collector 32, and the connection between the joint 34 and the interface 13 can be improved to a certain extent.

[0214] Specifically, in one embodiment, the outer diameter of the connecting pipe 40 can be greater than the inner diameter of the sealing layer 344. After the connecting pipe 40 is inserted into the first flow channel 36, the connecting pipe 40 can extrude the sealing layer 344 in the first flow channel 36, so that the connecting pipe 40 is in interference fit with the sealing layer 344, thereby making the sealing layer 344 tightly fit the connecting pipe 40, and improving the connection between the joint 34 and the current collector 32.

[0215] In one embodiment, the outer diameter of the interface 13 can be greater than the inner diameter of the sealing layer 344. After the interface 13 is inserted into the second flow channel 391, the interface 13 can extrude the sealing layer 344 in the second flow channel 391, so that the interface 13 is in interference fit with the sealing layer 344, thereby making the sealing layer 344 tightly fit the interface 13, and improving the connection between the joint 34 and the interface 13.

[0216] The interference amount of the connecting pipe 40 and the sealing layer 344, and the interference amount of the interface 13 and the sealing layer 344 can be determined according to factors such as sealing performance, cost, assembly efficiency, experience, etc.

[0217] According to some embodiments of the present application, optionally, please refer to Figures 6 to 7 The sealing layer 344 and the shell 343 are manufactured by a two-color injection molding process.

[0218] In the above embodiments, the sealing layer 344 and the shell 343 are manufactured by a two-color injection molding process, which can improve the manufacturing efficiency of the joint 34 to a certain extent and reduce the cost.

[0219] Specifically, the two-color injection molding process is a process of forming another component (such as an elastomer) on a rigid substrate, and finally forming a product composed of different polymers with different mechanical properties and different two-color visual effects and permanently coupled. For example, two different materials can be injection molded into the same mold, and the combination and molding of the two materials can be achieved through injection molding technology and mold design, thereby manufacturing the corresponding product.

[0220] In the present application, the rigid substrate is the shell 343, and the sealing layer 344 is the elastomer, so that a joint structure with a hard outer shell and a soft inner sealing layer 344 can be formed by a two-color injection molding process. The two-color injection molding process is mature, and the product is easy to manufacture and the material cost is low, thereby improving the manufacturing efficiency of the joint 34 to a certain extent and reducing the cost.

[0221] According to some embodiments of this application, optionally, please refer to... Figures 5 to 6 The insertion port 361 of the first flow channel 36 is provided with an annular guide portion 60 around its periphery. The guide portion 60 is gradually widened in the direction away from the first connecting portion 35. The guide portion 60 is configured to guide the connecting tube 40 into the first flow channel 36.

[0222] In the above embodiments, the guide portion 60 is configured to guide the insertion of the connecting tube 40 into the first flow channel 36, which can improve assembly efficiency to a certain extent.

[0223] When assembling the connector 34 and the collector 32, the connector 34 can approach the connecting pipe 40, and the guide portion 60 can first contact the connecting pipe 40. Since the guide portion 60 has a gradually expanding shape away from the first connecting portion 35, when the guide portion 60 approaches the connecting portion, the opening size of the outward-facing portion of the guide portion 60 is larger, making it easier for the connecting pipe 40 to enter the guide portion 60. The connecting pipe 40 can be guided along the inner wall surface of the guide portion 60 and enter the first flow channel 36, thereby improving the assembly efficiency of the connector 34 and the collector 32 to a certain extent.

[0224] Optionally, in one embodiment, please combine Figure 3 The sealing layer 344 extends to the inner wall surface of the guide portion 60. Optionally, in one embodiment, please combine Figure 4 The second limiting part 37 extends to the outer peripheral surface of the guide part 60.

[0225] According to some embodiments of this application, optionally, please refer to... Figure 3 and Figure 4 The two adjacent current collectors 32 are clamped and fixed to the connector 34.

[0226] In the above embodiments, the clamping and fixing of the connector 34 between two adjacent current collectors 32 can improve the reliability of the connection between the connector 34 and the current collector 32.

[0227] In one embodiment, please combine ​ The heat exchange body 31 has collectors 32 at both ends along its extension direction. The connector 34 may include an inlet connector 341 and an outlet connector 342. The extension direction of the heat exchange body 31 is the left-right direction of the vehicle. The connector 34 at the left end of the heat exchange body 31 may be either an inlet connector 341 or an outlet connector 342, while the connector 34 at the right end of the heat exchange body 31 may be either an outlet connector 342 or an inlet connector 341. The connector 34 at the left end of the heat exchange body 31 is clamped and fixed by two adjacent collectors 32 at the left end, and the connector 34 at the right end of the heat exchange body 31 is clamped and fixed by two adjacent collectors 32 at the right end.

[0228] In one embodiment, please combine ​The heat exchange main body 31 is provided with a current collector 32 at one end (e.g., the left end or the right end) in the extension direction. The joint 34 can include an inlet joint 341 and an outlet joint 342. The extension direction of the heat exchange main body 31 is the left-right direction of the vehicle. The inlet joint 341 and the outlet joint 342 at the left end or the right end of the heat exchange main body 31 are clamped and fixed by the two adjacent current collectors 32 at the left end or the right end.

[0229] In a second aspect, the present application provides an energy storage device, which includes a plurality of the battery device 100 of any of the above embodiments, and the battery device 100 is used to store or provide electric energy.

[0230] The energy storage device includes one or more battery clusters to improve the voltage and capacity of the energy storage device. The battery cluster can include a plurality of battery devices 100 connected in series through the busbar component to improve the voltage of the energy storage device. When the energy storage device includes a plurality of battery clusters, the plurality of battery clusters are connected in parallel to improve the capacity of the energy storage device. The definition of the battery device 100 is described above and will not be repeated here.

[0231] The energy storage device can be used in energy storage power stations, wind power systems, solar power systems, mobile power systems, or temporary power supply systems, etc. The energy storage device can store electric energy as needed and output electric energy at an appropriate time. For example, the energy storage device can store electric energy during the low electricity consumption period, and provide electric energy for related users or electric equipment during the peak electricity consumption period.

[0232] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0233] In some embodiments, the energy storage device can include a cabinet body and one or more battery clusters, and the battery cluster is contained in the cabinet body.

[0234] In some embodiments, the energy storage device can include a thermal management module, a master control module, a general control module, a power distribution module, and a fire-fighting module, etc.

[0235] As an example, the thermal management module can include a liquid cooling unit (temperature regulating unit) that provides cooling liquid (fluid) for regulating the temperature of the battery monomer 20 to each battery device 100 through the pipeline.

[0236] As an example, the master control module can serve as a battery management unit of the battery cluster for monitoring and managing the battery cluster. The master control module can monitor the current, voltage, power, or temperature, etc. of the battery cluster. For example, the charging and discharging current, voltage, etc. of the battery cluster can be controlled. The master control module includes a slave battery management unit SBMU (Slave Battery Management Unit, SBMU), a fusion switch, etc.

[0237] As an example, the general control module can be used as a battery management unit of the energy storage device, for monitoring and managing the energy storage device. The general control module can monitor information such as current, voltage, power, state of charge, or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the general control module includes an insulation monitoring module IMM (Insulation Monitoring Module, IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), an Ethernet ETH (EtherNet, ETH), and an optical fiber conversion module, etc.

[0238] As an example, the fire control module includes a control panel, a detector, an alarm device, etc., for detecting, alarming, or extinguishing the energy storage device.

[0239] As an example, the power distribution module can be used to distribute power to the power consumption module of the energy storage device.

[0240] In a third aspect, the present application provides a power consumption device, which includes the battery device 100 of any of the above embodiments, or the energy storage device of the above embodiments.

[0241] The power consumption device can be a device or system of any of the above application battery devices 100.

[0242] 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 above embodiments, those skilled in the art should understand that: it can still modify the technical solutions recorded in the above 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 by, The battery device comprises: a box body provided with an interface communicating with the outside; a plurality of battery monomers arranged in the box body; a heat exchange assembly arranged in the box body and configured to exchange heat with the battery monomers; wherein the heat exchange assembly comprises: a heat exchange main body having a medium flow channel inside, the heat exchange main body being arranged between adjacent battery monomers; a current collector connected to at least one end of the heat exchange main body, the current collector communicating with the medium flow channel; a connecting piece connecting a plurality of current collectors; a connector configured as at least one, connecting the current collector and the interface.

2. The battery device of claim 1, wherein The interface is located on a first side wall of the box body close to one end of the heat exchange main body in the extension direction.

3. The battery device of claim 2, wherein The first side wall comprises at least one of the front side wall, the rear side wall, the left side wall and the right side wall of the battery device.

4. The battery device according to claim 2 or 3, characterized by The first side wall intersects the extension direction of the heat exchange main body.

5. The battery device of claim 4, wherein The first side wall is perpendicular to the extension direction of the heat exchange main body.

6. The battery device according to any one of claims 1 to 5, wherein The side surface of the heat exchange main body is in contact with the side surface of the battery monomer to exchange heat with the battery monomer.

7. The battery device of claim 6, wherein The side surface comprises a first side surface, which is the largest surface among the side surfaces of the battery monomer, and the side surface of the heat exchange main body is in contact with the first side surface.

8. The battery device according to any one of claims 1 to 7, wherein The current collector is located on both ends or one end of the same heat exchange main body.

9. The battery device according to any one of claims 1 to 8, wherein The connector comprises an inlet connector and an outlet connector, the inlet connector and the outlet connector are located on the same end of the heat exchange main body in the extension direction and are connected with the adjacent two current collectors, or; The inlet connector and the outlet connector are respectively located on both ends of the heat exchange main body in the extension direction, the inlet connector is connected with the adjacent two current collectors on one end of the heat exchange main body in the extension direction, and the outlet connector is connected with the adjacent two current collectors on the other end of the heat exchange main body in the extension direction.

10. The battery device according to any one of claims 1 to 9, characterized by, The connector is detachably connected with the current collector.

11. The battery device according to any one of claims 1 to 10, wherein The current collector is provided with a connecting pipe, the connector comprises a first connecting part, one of the first connecting part and the connecting pipe is provided with a first flow channel, and the other is at least partially inserted into the first flow channel.

12. The battery device of claim 11, wherein, The current collector is provided with a first limiting part, the connector comprises a second limiting part provided on the first connecting part, and the first limiting part and the second limiting part abut to limit the rotation of the connector relative to the current collector.

13. The battery device of claim 12, wherein, The first limiting part is arranged outside the outer circumferential surface of the connecting pipe, the second limiting part is arranged on the outer circumferential surface of the first connecting part, and the second limiting part is located between the first limiting part and the first connecting part.

14. The battery device according to claim 12 or 13, characterized by The first limiting part comprises a first plane, and the second limiting part comprises a second plane, the first plane and the second plane are parallel to each other and abut to each other.

15. The battery device according to claim 12 or 13, characterized by One of the first limiting part and the second limiting part is provided with a notch, and the other is at least partially embedded in the notch.

16. The battery device according to any one of claims 11 to 15, wherein The connector comprises a shell and a sealing layer, the shell comprises the first connecting part, the sealing layer is arranged on the wall surface of the first flow channel in the circumferential direction of the first flow channel, and the sealing layer seals the first connecting part and the connecting pipe.

17. The battery device of claim 16, wherein, The first connecting part is provided with the first flow channel, two insertion openings are formed at both ends of the first connecting part along the extension direction, and the connecting pipes of the adjacent two current collectors are inserted into the first flow channel through the two insertion openings respectively.

18. The battery device of claim 17, wherein, The joint comprises a second connecting part connected with the first connecting part, the second connecting part is provided with a second flow channel, the second flow channel is communicated with the first flow channel, and the second connecting part is connected with the interface piece.

19. The battery device of claim 18, wherein, The wall surface of the second flow channel is provided with the sealing layer along the circumferential direction, at least a part of the interface piece is inserted into the second flow channel, and the sealing layer seals and connects the second connecting part and the interface piece.

20. The battery device of claim 19, wherein, The sealing layer is connected with the connecting pipe and the interface piece in an interference fit.

21. The battery device of any one of claims 16-20, wherein, The sealing layer and the shell are manufactured through a double-color injection molding process.

22. The battery device of any one of claims 11-21, wherein, The insertion opening periphery of the first flow channel is provided with an annular guide part, the guide part is gradually expanded in a direction away from the first connecting part, and the guide part is configured to guide the insertion of the connecting pipe into the first flow channel.

23. The battery device of any one of claims 1-22, wherein, The adjacent two current collectors are clamped and fixed to the joint.

24. An energy storage device, comprising: The battery device comprises a plurality of battery devices according to any one of claims 1-23, and is used for storing or providing electric energy.

25. An electrical device, comprising: The battery device comprises the battery device according to any one of claims 1-23 or the energy storage device according to claim 24.

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