Battery device, energy storage device, and power consumption device

Abstract

The application discloses a battery device, an energy storage device and a power utilization device. The application relates to the technical field of vehicles, and solves or alleviates the problem of poor connection reliability between a heat exchange main body and a box. The battery device comprises a box, a plurality of battery monomers and a heat exchange assembly. The box is provided with an interface part in communication with the outside, the plurality of battery monomers are arranged in the box, and the heat exchange assembly comprises a current collector, a heat exchange main body and a connecting piece. The heat exchange main body is configured to exchange heat with the battery monomers. The current collector is connected with the interface part, the connecting piece connects the heat exchange main body and the current collector, and the connecting piece is flexible. In the technical scheme of the application, the current collector is connected with the interface part, the connecting piece connects the heat exchange main body and the current collector, and the connecting piece is flexible. The stress generated by the abutment of the heat exchange main body and the box can be eliminated to a certain extent, the anti-leakage capability of the heat exchange assembly is improved, and the reliability of the battery device is enhanced.

Description

Technical Field

[0001] This application relates to the field of battery technology, specifically to a battery device, an energy storage device, and an electrical device. Background Technology

[0002] The performance of a battery device is closely related to temperature. Both excessively high and low temperatures can reduce the charging and discharging efficiency of the battery. In order to ensure the normal and efficient operation of the battery module, heat exchange components can be installed in the battery device to ensure that the temperature of the battery device is within the range that allows it to operate normally.

[0003] In related technologies, the battery device includes a housing and multiple battery cells arranged in the housing. The heat exchange assembly includes a heat exchange body disposed on the multiple battery cells. The heat exchange body is prone to deformation due to temperature influence, or due to manufacturing and assembly errors between the heat exchange body and the housing, extrusion occurs between the heat exchange body and the housing, resulting in poor connection reliability and poor leakage resistance between the heat exchange body and the housing. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device, an energy storage device, and an electrical device that can solve or alleviate the problem of poor connection reliability between the heat exchanger body and the housing.

[0005] In a first aspect, this application provides a battery device, the battery device comprising:

[0006] The enclosure has an interface for communicating with the outside.

[0007] Multiple battery cells are arranged inside the housing;

[0008] A heat exchange assembly is disposed inside the housing. The heat exchange assembly includes a current collector, a heat exchange body, and a connector. The heat exchange body is configured to exchange heat with the battery cell.

[0009] The current collector is connected to the interface portion;

[0010] The connector connects the heat exchange body and the collector, and the connector is flexible.

[0011] In the technical solution of this application embodiment, the current collector is connected to the interface part, and the connector connects the heat exchange body and the current collector. Since the connector is flexible, it can eliminate the stress generated by the heat exchange body and the box to a certain extent, thereby improving the anti-leakage capability of the heat exchange component and enhancing the reliability of the battery device.

[0012] In some embodiments, the plurality of battery cells are arranged along a first direction, or the plurality of battery cells are arranged along a second direction, wherein the first direction is perpendicular to the second direction, and the length direction of the heat exchange body is parallel to the first direction or the second direction.

[0013] In the above technical solution, the arrangement direction of the battery cells and the heat exchange body can be flexibly set.

[0014] In some embodiments, the heat exchange surface of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

[0015] In the above technical solution, heat exchange occurs between the battery cell and the heat exchange body through surface contact, which can improve the heat exchange efficiency between the heat exchange body and the battery cell.

[0016] In some embodiments, the side of the battery cell includes a first surface that contacts other battery cells along the battery cell arrangement direction and a second surface that is perpendicular to the first surface, and the heat exchange surface of the heat exchange body contacts the first surface, or the heat exchange surface of the heat exchange body contacts the second surface.

[0017] In the above technical solution, the heat exchanger body is in contact with the large surface or side surface of the battery cell, and the contact surface between the heat exchanger body and the battery cell can be flexibly set.

[0018] In some embodiments, the interface portion includes an inlet portion and an outlet portion, the inlet portion and the outlet portion being located on the same side of the housing along its length direction, or;

[0019] The inlet and outlet are located at opposite ends of the housing along its length.

[0020] In the above technical solution, the inlet and outlet ports can be located on the same side of the housing, which simplifies the layout of the heat exchange components and facilitates connection. Alternatively, the inlet and outlet ports can be located on opposite sides of the housing, which helps improve the efficiency of heat exchange fluid flow in and out.

[0021] In some embodiments, the connector includes a flexible segment configured to deform without breaking under external force.

[0022] In the above technical solution, when the connector connects the heat exchanger body and the collector, the flexible section on the connector deforms without breaking under the action of external force, thus making the connector flexible.

[0023] In some embodiments, the flexible segment includes a metal connecting pipe, which includes one of a corrugated pipe, a telescopic pipe, and a hinged pipe.

[0024] In the above technical solution, rigid materials can be used to make the connector flexible through structural design, while ensuring the strength of the connector.

[0025] In some embodiments, the elastic modulus of the metal connecting tube is in the range of [100GPa, 250GPa].

[0026] In the above technical solution, selecting the material of the metal connecting pipe within an appropriate range of elastic modulus helps to ensure the strength of the connecting parts.

[0027] In some embodiments, the flexible segment includes a flexible connecting tube, which includes one of an elastic hose, a corrugated tube, a telescopic tube, and a hinged tube.

[0028] In the above technical solutions, flexible materials can be selected, or the flexible materials can be structurally designed to make the connectors flexible.

[0029] In some embodiments, the elastic modulus of the flexible connecting tube ranges from [0.2 GPa, 5 GPa].

[0030] In the above technical solution, the connector can be made flexible by selecting a flexible material with an elastic modulus within an appropriate range.

[0031] In some embodiments, the connector further includes connecting segments that are respectively connected to both ends of the flexible segment.

[0032] In the above technical solution, the connecting section facilitates connection with the heat exchanger body and the collector.

[0033] In some embodiments, the heat exchange body includes a main flow channel, the main flow channel includes a first heat exchange channel and a second heat exchange channel, the plurality of battery cells include a first part and a second part, a portion of the heat exchange fluid flows to the first heat exchange channel to exchange heat with the first part, and a portion flows to the second heat exchange channel to exchange heat with the second part.

[0034] In the above technical solution, the first heat exchange channel and the second heat exchange channel respectively cool the first part and the second part of the battery cell, which is beneficial to improving the heat exchange efficiency.

[0035] In some embodiments, the inlets of the first heat exchange channel and the second heat exchange channel are respectively connected to the current collector.

[0036] In the above technical solution, the heat exchange fluid flows to the first heat exchange channel and the second heat exchange channel through the collector, which simplifies the heat exchange circuit and allows the heat exchange fluid to flow quickly to the first heat exchange channel and the second heat exchange channel, thus improving the heat exchange efficiency.

[0037] In some embodiments, the main flow channel includes an inlet flow channel and a branch flow channel. The inlet of the inlet flow channel is connected to the collector, the inlet of the first heat exchange flow channel is connected to the outlet of the inlet flow channel, and the second heat exchange flow channel is connected to the outlet of the inlet flow channel through the branch flow channel.

[0038] In the above technical solution, the first heat exchange channel is directly connected to the inlet channel, the second heat exchange channel is connected to the inlet channel through a branch channel, and the inlet channel is connected to the collector, which simplifies the connection between the channel and the collector, helps to save installation space and simplify the installation steps.

[0039] In some embodiments, the heat exchange body includes two main flow channels, which are symmetrically arranged along the length of the housing. The interface includes an inlet interface, and the collector includes an inlet collector. The inlet collector includes a first connection port and a second connection port. The first connection port is connected to the inlet of the inlet flow channel in a one-to-one correspondence, and the second connection port communicates with the inlet interface.

[0040] In the above technical solution, the heat exchange fluid enters through an inlet collector and is then diverted to two main flow channels to improve heat exchange efficiency.

[0041] In some embodiments, the outlets of the first heat exchange channel and the second heat exchange channel are respectively connected to the current collector.

[0042] In the above technical solution, the heat exchange fluid flowing through the first heat exchange channel and the second heat exchange channel flows out directly through the collector, which can improve the circulation efficiency of the heat exchange fluid.

[0043] In some embodiments, the outlet of the first heat exchange channel is connected to the inlet of the second heat exchange channel, and the outlet of the second heat exchange channel is connected to the collector.

[0044] In the above technical solution, the two branch flow channels converge, which can reduce the number of outlets of the heat exchange body, simplify the heat exchange circuit, and facilitate installation and connection.

[0045] In some embodiments, the heat exchange body includes two main flow channels, which are symmetrically arranged along the length of the housing. The interface includes an outlet interface, and the collector includes an outlet collector. The outlet collector includes a third connection port and a fourth connection port. The third connection port is connected to the outlet of the second heat exchange flow channel in a one-to-one correspondence, and the fourth connection port communicates with the outlet interface.

[0046] In the above technical solution, the outlet collector realizes the convergence of the heat exchange fluid flowing out of the two main flow channels, which simplifies the heat exchange circuit.

[0047] In some embodiments, the interface includes an inlet and an outlet, the inlet and the outlet being located on the same side of the housing along its length, and the current collector includes an inlet current collector and an outlet current collector, the inlet current collector and the outlet current collector being fixedly connected to the housing so that the inlet current collector communicates with the inlet and the outlet current collector communicates with the outlet.

[0048] In the above technical solution, the inlet collector, the outlet collector, and the corresponding interface are located on the same side of the housing, which facilitates the access of external heat exchange fluid.

[0049] In some embodiments, the current collector includes a snap fastener that securely connects the inlet current collector and the outlet current collector to fix their relative positions.

[0050] In the above technical solution, the inlet collector and the outlet collector are fixedly connected by a snap-fit, which can fix the inlet collector and the outlet collector to each other and facilitate installation.

[0051] In some embodiments, the heat exchange body includes one of a heat exchange plate and a heat exchange tube.

[0052] In the above technical solution, the form of the heat exchange body can be flexibly selected according to the layout of the battery cells.

[0053] In some embodiments, the heat exchange tube is flat.

[0054] The above technical solution is beneficial for increasing the contact area between the heat exchange tube and the battery cell.

[0055] Secondly, this application provides an energy storage device, including a plurality of battery devices as described in the above embodiments, the battery devices being used to store or provide electrical energy.

[0056] Thirdly, this application provides an electrical device, including the battery device described in any of the above embodiments, or the energy storage device described in the above embodiments.

[0057] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, specific embodiments of this application are given below. Attached Figure Description

[0058] Various other advantages and benefits will become apparent to those skilled in the art upon reading the detailed description of the preferred embodiments below. The accompanying drawings are for illustrative purposes only and are not intended to limit the scope of this application. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0059] Figure 1 This is a schematic diagram of the vehicle structure according to some embodiments of this application;

[0060] Figure 2 This is an exploded view of the battery device according to some embodiments of this application;

[0061] Figures 3 to 5 This is a schematic diagram of the structure of a heat exchange component according to some embodiments of this application;

[0062] Figures 6 to 8 This is a schematic diagram of the structure of the connector in some embodiments of this application;

[0063] Figure 9 This is a schematic diagram showing the connection of the connector, the current collector, and the heat exchange body in some embodiments of this application;

[0064] Figure 10 and Figure 11 This is a schematic diagram of the structure of a battery device according to some embodiments of this application.

[0065] The reference numerals in the detailed embodiments are as follows:

[0066] 1000 vehicles;

[0067] Battery assembly 100, battery cell 10, first part 11, second part 12, housing 70, first housing 71, second housing 72;

[0068] Controller 200, Motor 300;

[0069] Heat exchange component 400, collector 41, inlet collector 411, first connection port 4111, second connection port 4112, outlet collector 412, third connection port 4121, fourth connection port 4122, snap fastener 413, heat exchange body 42, body flow channel 421, inlet flow channel 422, first heat exchange flow channel 423, second heat exchange flow channel 424, diversion flow channel 425, connector 43, flexible section 431, connecting section 432. Detailed Implementation

[0070] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0071] 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 pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0072] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0073] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0074] Unless otherwise specified, all steps of this application may be performed sequentially or randomly, preferably sequentially. For example, the method includes steps (a) and (b), indicating that the method may include steps (a) and (b) performed sequentially, or it may include steps (b) and (a) performed sequentially. For example, the mention that the method may also include step (c) indicates that step (c) may be added to the method in any order; for example, the method may include steps (a), (b), and (c), or it may include steps (a), (c), and (b), or it may include steps (c), (a), and (b), etc.

[0075] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0076] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0077] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0078] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0079] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0080] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0081] The performance of a battery device is closely related to temperature. Both excessively high and low temperatures can reduce the charging and discharging efficiency of the battery. In order to ensure the normal and efficient operation of the battery module, heat exchange components can be installed in the battery device to ensure that the temperature of the battery device is within the range that allows it to operate normally.

[0082] In related technologies, the battery device includes a housing and multiple battery cells arranged in the housing. The heat exchange assembly includes a heat exchange body disposed on the multiple battery cells. The heat exchange body is prone to deformation due to temperature influence, or due to manufacturing and assembly errors between the heat exchange body and the housing, extrusion occurs between the heat exchange body and the housing, resulting in poor connection reliability and poor leakage resistance between the heat exchange body and the housing.

[0083] Based on the above considerations, in order to solve or alleviate the problem of poor connection reliability between the heat exchanger body and the housing, this application provides a battery device, including a housing, multiple battery cells, and a heat exchange assembly. The housing has an interface for communication with the outside. Multiple battery cells are arranged inside the housing. The heat exchange assembly includes a current collector, a heat exchanger body, and a connector. The heat exchanger body is configured to exchange heat with the battery cells. The current collector is connected to the interface, and the connector connects the heat exchanger body and the current collector; the connector is flexible.

[0084] In such a battery device, the current collector is connected to the interface section, and the connector connects the heat exchange body and the current collector. Because the connector is flexible, it can eliminate the stress generated by the contact between the heat exchange body and the housing to a certain extent, thereby improving the leakage resistance of the heat exchange components and enhancing the reliability of the battery device.

[0085] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0086] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0087] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0088] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0089] As an example, the housing 70 may include a first housing 71 and a second housing 72. The first housing 71 and the second housing 72 are fastened together to form a closed space inside the housing 70 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing may be a top cover or a bottom plate.

[0090] As an example, the housing 70 may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are respectively connected to the frame, so that the interior of the housing forms an enclosed space to accommodate the battery cell assembly.

[0091] In some embodiments, the housing 70 may be part of the vehicle's chassis structure. For example, a portion of the housing 70 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 70 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0092] In some embodiments of this application, the electrical device is a vehicle 1000. The battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0093] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0094] Please refer to Figure 1 , Figure 1 The diagram below illustrates the structure of a vehicle 1000 as provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. The new energy vehicle can be a pure electric vehicle, a hybrid electric vehicle, or a range-extended electric vehicle, etc.

[0095] The vehicle 1000 has a battery device 100 installed inside, which may be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, it can serve as the vehicle 1000's operating power source. The vehicle 1000 may also include a controller 200 and a motor 300. The controller 200 controls the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0096] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device 100 includes a housing 70 and an energy unit 10, the energy unit 10 being housed within the housing 70. The housing 70 provides a closed space for the energy unit 10, and the housing 70 can adopt various structures.

[0097] In some embodiments, please combine Figure 2 , Figure 3 as well as Figure 10 and Figure 11 This application provides a battery device 100, which includes a housing 70, a plurality of battery cells 10 and a heat exchange assembly 400.

[0098] The housing 70 has an interface for communicating with the outside. Multiple battery cells 10 are arranged inside the housing 70, and a heat exchange assembly 400 is disposed inside the housing 70. The heat exchange assembly 400 includes a current collector 41, a heat exchange body 42, and a connector 43. The heat exchange body 42 is configured to exchange heat with the battery cells 10.

[0099] The collector 41 is connected to the interface part, and the connector 43 connects the heat exchange body 42 and the collector 41. The connector 43 is flexible.

[0100] In the technical solution of this application embodiment, the current collector 41 is connected to the interface part, and the connector 43 connects the heat exchange body 42 and the current collector 41. Since the connector 43 is flexible, it can eliminate the stress generated by the heat exchange body 42 abutting against the box 70 to a certain extent, thereby improving the anti-leakage capability of the heat exchange assembly 400 and enhancing the reliability of the battery device 100.

[0101] Specifically, the enclosure 70 protects and houses the battery cells 10, heat exchange components 400, and other components. The material of the enclosure 70 includes, but is not limited to, metals and composite materials. The shape of the enclosure 70 includes, but is not limited to, regular or irregular shapes such as cuboids.

[0102] Other components of the battery device 100 include, but are not limited to, a high-voltage box, a battery management system, a busbar, and a sampling assembly.

[0103] A single battery cell 10 can be the smallest unit for storing electrical energy, and multiple battery cells 10 can be electrically connected in series, parallel, or mixed connection. Mixed connection can refer to multiple battery cells 10 being connected in both series and parallel.

[0104] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0105] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0106] The heat exchange assembly 400 is disposed inside the housing 70 and is used to exchange heat with the battery cell 10 to keep the battery cell 10 within a suitable operating temperature range.

[0107] Furthermore, the enclosure 70 can protect and house the heat exchange assembly 400. The heat exchange assembly 400 can exchange heat with the battery cell 10, allowing the battery cell 10 to operate within its normal temperature range.

[0108] The housing 70 is provided with an interface for communication with the outside. The collector 41 is fixedly installed on the interface and is connected to the heat exchange body 42, so that the external heat exchange fluid and the heat exchange fluid in the heat exchange body 42 can be connected through the collector 41.

[0109] When the heat exchange assembly 400 is installed, the current collector 41 is first installed at the interface, and the heat exchange body 42 is in direct contact with the battery cell 10. At the same time, the current collector 41 and the heat exchange body 42 are connected by the connector 43, so that the heat exchange fluid in the heat exchange body 42 can be connected with the external heat exchange fluid.

[0110] However, due to manufacturing and assembly errors between the housing 70, the collector 41, and the heat exchange body 42, or because the heat exchange body 42 is prone to deformation due to temperature changes, compression may occur between the housing 70 and the heat exchange body 42. The flexible nature of the connector 43 absorbs these errors, thus preventing compression between the heat exchange body 42 and the housing 70.

[0111] Optionally, the heat exchange fluid includes, but is not limited to, water, ethylene glycol and mixtures thereof (such as ethylene glycol-water mixtures).

[0112] In some embodiments, a plurality of battery cells 10 are arranged along a first direction, or a plurality of battery cells 10 are arranged along a second direction, the first direction being perpendicular to the second direction, and the length direction of the heat exchange body 42 being parallel to the first or second direction.

[0113] In the above technical solution, the arrangement direction of the battery cell 10 and the heat exchange body 42 can be flexibly set.

[0114] Specifically, such as Figure 2 As shown, a plurality of battery cells 10 can be arranged along a first direction to form a battery module, and multiple battery modules can be arranged within a housing 70 along the first direction and / or a second direction, wherein the first direction and the second direction are perpendicular to each other. In one embodiment, the first direction can be the longitudinal direction of the vehicle, and the second direction can be the lateral direction of the vehicle. In another embodiment, the first direction can be the lateral direction of the vehicle, and the second direction can be the longitudinal direction of the vehicle.

[0115] The length direction of the heat exchanger body 42 is parallel to either the first or the second direction. That is, the length direction of the heat exchanger body 42 can be arranged along the front-rear direction of the vehicle, or it can be arranged along the left-right direction of the vehicle. In this way, the battery cell 10 and the heat exchanger body 42 can be flexibly arranged according to actual needs.

[0116] In some embodiments, the heat exchange surface of the heat exchange body 42 contacts the side of the battery cell 10 to exchange heat with the battery cell 10.

[0117] In the above technical solution, the battery cell 10 and the heat exchange body 42 exchange heat through surface contact, which can improve the heat exchange efficiency between the heat exchange body 42 and the battery cell 10.

[0118] Specifically, the battery cell 10 may include a housing and an electrode assembly, the electrode assembly being disposed within the housing, and the housing having electrode terminals electrically connected to the electrode assembly. The side of the heat exchange body 42 may contact the side of the housing.

[0119] Optionally, in one embodiment, the outer casing is rectangular, and the heat exchange body 42 is also rectangular to match the shape of the outer casing. The sides of the heat exchange body 42 contact the sides of the outer casing, allowing the battery cell 10 to exchange heat with the fluid through the outer casing and the heat exchange body 42. The large contact area between the sides facilitates rapid heat transfer, which is beneficial for improving the heat exchange efficiency between the heat exchange body 42 and the battery cell 10.

[0120] Optionally, in one embodiment, the outer casing is rectangular, and multiple battery cells 10 are arranged sequentially inside the housing 70. The shape of the heat exchange body 42 is adapted to the bottom of the housing 70. The battery cells 10 contact the heat exchange body 42 by facing the bottom of the housing 70. In this way, the heat exchange body 42 occupies a small space area inside the battery device 100, which is beneficial to improving the energy density of the battery device 100.

[0121] The heat exchanger body 42 may be made of materials including, but not limited to, metal, and the casing of the battery cell 10 may also be made of materials including, but not limited to, metal. The materials of the heat exchanger body 42 and the casing of the battery cell 10 may be the same or different.

[0122] In some embodiments, the side of the battery cell 10 includes a first surface that contacts other battery cells 10 along the arrangement direction of the battery cells 10 and a second surface that is perpendicular to the first surface. The heat exchange surface of the heat exchange body 42 contacts the first surface, or the heat exchange surface of the heat exchange body 42 contacts the second surface.

[0123] In the above technical solution, the heat exchange body 42 is in contact with the large surface or side surface of the battery cell 10, and the contact surface between the heat exchange body 42 and the battery cell 10 can be flexibly set.

[0124] Optionally, in one embodiment, the battery cell 10 can be a prismatic battery cell 10. The outer shell of the battery cell 10 is rectangular. The first surface is the surface with the largest area among the side surfaces of the outer shell, also known as the large surface. The first surface has the largest area and accumulates the most heat in the battery cell 10. The side surface of the heat exchange body 42 is in contact with the first surface, so that more heat can be transferred to the heat exchange body 42 in a timely manner and exchanged with the fluid inside the heat exchange body 42, thereby further improving the heat exchange efficiency between the heat exchange body 42 and the battery cell 10.

[0125] Optionally, in one embodiment, the first side of a plurality of battery cells 10 is in contact with each other, and the second side is the bottom surface of the battery cell 10 facing the housing 70. The battery cell 10 contacts the heat exchange body 42 through the bottom facing the housing 70. In this way, the heat exchange body 42 occupies a small space area in the battery device 100, which is beneficial to improving the energy density of the battery device 100.

[0126] In some embodiments, the interface includes an inlet interface and an outlet interface, which are located on the same side of the housing 70 along its length.

[0127] In the above technical solution, the inlet and outlet ports can be located on the same side of the housing 70, which simplifies the layout of the heat exchange assembly 400 and facilitates connection.

[0128] The side walls of the housing 70 include two side walls along the front-rear direction of the vehicle and two side walls along the left-right direction of the vehicle.

[0129] Optionally, when the heat exchange body 42 is arranged along the longitudinal direction of the vehicle, the inlet and outlet ports can be simultaneously located on one of the two side walls of the housing 70 along the longitudinal direction of the vehicle.

[0130] Optionally, when the length of the heat exchange body 42 is arranged along the left-right direction of the vehicle, the inlet and outlet ports can be simultaneously located on one of the two side walls of the housing 70 along the left-right direction of the vehicle.

[0131] In some embodiments, the inlet and outlet portions are located at opposite ends of the housing 70 along its length.

[0132] In the above technical solution, the inlet and outlet ports can be located on opposite sides of the housing 70, which helps to improve the efficiency of heat exchange fluid flow in and out.

[0133] Optionally, if the heat exchange body 42 is arranged along the longitudinal direction of the vehicle, the inlet and outlet ports can be respectively located on the two side walls of the housing 70 along the longitudinal direction of the vehicle.

[0134] Optionally, if the heat exchange body 42 is arranged along the left-right direction of the vehicle in the length direction, the inlet and outlet ports can be respectively provided on the two side walls of the housing 70 along the left-right direction of the vehicle.

[0135] Please see Figure 3 and Figure 6 In some embodiments, the connector 43 includes a flexible segment 431, which is configured to deform without breaking under the action of external force.

[0136] In the above technical solution, when the connector 43 connects the heat exchange body 42 and the collector 41, the flexible section 431 on the connector 43 deforms without breaking under the action of external force, thereby making the connector 43 flexible.

[0137] Specifically, the connector 43 includes a flexible section 431. When the connector 43 connects the heat exchange body 42 and the collector 41, the flexible section 431 deforms to absorb the positional error between the heat exchange body 42 and the collector 41. Because the flexible section 431 has the characteristic of being able to deform without breaking under external force, the connection between the heat exchange body 42 and the collector 41 can be made more reliable.

[0138] The positional error between the heat exchanger body 42 and the collector 41 may be that the connection ends of the collector 41 and the heat exchanger body 42 are not at the same height. By bending and tilting the flexible section 431 on the connector 43, the collector 41 and the heat exchanger body 42 are connected, thereby absorbing the positional error between the heat exchanger body 42 and the collector 41.

[0139] The positional error between the heat exchanger body 42 and the collector 41 may be due to the distance between the connection ends of the collector 41 and the heat exchanger body 42 being too small or too large. In this case, the collector 41 and the heat exchanger body 42 can be connected by bending, tilting, shrinking or stretching the flexible section 431 on the connector 43, thereby absorbing the positional error between the heat exchanger body 42 and the collector 41.

[0140] In some embodiments, the flexible segment 431 includes a metal connecting pipe, which includes one of a corrugated pipe, a telescopic pipe, and a hinged pipe.

[0141] In the above technical solution, rigid materials can be used to make the connector 43 flexible through structural design, while ensuring the strength of the connector 43.

[0142] Specifically, on the one hand, the connector 43 is made flexible by structural design of the metal pipe.

[0143] For example, the flexible section 431 can be configured as a corrugated pipe, a telescopic pipe, or a hinged pipe. The structure of a corrugated pipe, a telescopic pipe, or a hinged pipe has good flexibility.

[0144] Please see Figures 6 to 8 The corrugated pipe has multiple corrugated folds, which allows the flexible section 431 to bend and expand to a certain extent, adapting to different installation positions and spatial layouts. It achieves smooth connection through its own bending, reducing stress concentration caused by rigid connection.

[0145] The telescopic tube can adopt a nested sleeve or folding hinge design, changing the length and shape of the flexible segment 431 by sliding or folding to achieve the deformation of the flexible segment 431. The hinge tube, also known as a hinged segmented pipe, divides the pipe into multiple short rigid segments, which are connected by micro-hinges (such as ball joints, universal joints, etc.).

[0146] On the other hand, the metal connecting pipe has good fatigue resistance, corrosion resistance and high temperature resistance, which can ensure the reliability of the heat exchange component 400.

[0147] Metal connecting pipes can withstand a certain degree of repeated bending, stretching, or compression without easily being damaged. The metal connecting pipes absorb vibration energy through their own flexibility, reducing damage to the heat exchanger body 42 and the collector 41 connected to them, and extending the service life of the heat exchange assembly 400.

[0148] Metal connecting pipes are made of corrosion-resistant metal materials, which can maintain good corrosion resistance and effectively prevent the pipes from being corroded, thereby ensuring the reliability of the heat exchange system.

[0149] Metal connecting pipes have good high-temperature resistance and can work in high-temperature and high-pressure environments without deformation or damage, thus ensuring the reliability of the heat exchange system.

[0150] In one embodiment, the current collector 41, the heat exchange body 42, and the connector 43 are all made of metal, and are connected by brazing. This connection method is simple and reliable, ensuring that the current collector 41, the heat exchange body 42, and the connector 43 can withstand the high temperature and high pressure environment within the flow channel, thus guaranteeing the reliability of the heat exchange assembly 400.

[0151] In some embodiments, the elastic modulus of the metal connecting pipe is in the range of [100GPa, 250GPa].

[0152] In the above technical solution, selecting the material of the metal connecting pipe within an appropriate elastic modulus range is beneficial to ensuring the strength of the connector 43.

[0153] Specifically, the elastic modulus reflects a material's ability to resist elastic deformation. Metal connecting pipes possess high rigidity and controllable flexibility; under normal operating conditions, they are not prone to plastic deformation, ensuring structural stability. Through structural designs such as corrugated pipes and hinged pipes, the metal connecting pipes can bend or tilt within their elastic range to accommodate minor adjustments to the installation space or dynamic displacement between the heat exchanger body 42 and the collector 41.

[0154] The elastic modulus of the metal connecting pipe is in the range of [100GPa, 250GPa]. For example, the elastic modulus of the metal connecting pipe can be 100GPa, 110GPa, 135GPa, 150GPa, 175GPa, 180GPa, 200GPa, 215GPa, 230GPa or 250GPa, or any other value in the range of [100GPa, 250GPa].

[0155] Alternatively, the metal connecting pipe can be made of materials such as chromium-nickel alloy steel or titanium alloy.

[0156] In some embodiments, the flexible segment 431 includes a flexible connecting tube, which includes one of an elastic hose, a corrugated tube, a telescopic tube, and a hinged tube.

[0157] In the above technical solution, flexible materials can be selected, or the flexible materials can be structurally designed to make the connector 43 flexible.

[0158] Specifically, the flexible connecting pipe has good flexibility and can adapt to different installation positions and spatial layouts. It can be bent, stretched or twisted to a certain extent, thereby relieving the stress of the connecting part 43, the heat exchange body 42 and the collector 41. When the heat exchange body 42 and the collector 41 have errors, small displacements or vibrations, the flexible connecting pipe can play a buffering role to absorb the positional errors between the heat exchange body 42 and the collector 41.

[0159] The flexibility of the connecting pipe can be achieved by selecting a flexible material, or by making certain structural designs on the basis of the flexible material to make the connector 43 flexible. For example, the flexible segment 431 includes a connecting pipe made of flexible material such as rubber, or one of the following: a corrugated pipe, a telescopic pipe, or a hinged pipe made of flexible material such as rubber.

[0160] In some embodiments, the elastic modulus of the flexible connecting tube ranges from [0.2 GPa, 5 GPa].

[0161] In the above technical solution, the connector 43 can be made flexible by selecting a flexible material with an elastic modulus within an appropriate range.

[0162] Specifically, a suitable elastic modulus can make the connecting pipe more elastic, making it easier to bend and adjust its position during installation. This facilitates the connection and adjustment of the position of the collector 41 of the heat exchange body 42, improving installation efficiency and reducing installation difficulty.

[0163] The elastic modulus of the flexible connecting pipe ranges from [0.2 GPa to 5 GPa]. For example, the elastic modulus of the flexible connecting pipe can be 0.2 GPa, 0.8 GPa, 1.5 GPa, 2.1 GPa, 2.5 GPa, 3.2 GPa, 3.8 GPa, 4.1 GPa, 4.6 GPa, or 5 GPa, or any other value within the range of [0.2 GPa to 5 GPa].

[0164] Alternatively, the flexible connecting pipe can be made of materials such as polypropylene or polytetrafluoroethylene.

[0165] Please see Figures 6 to 9 In some embodiments, the connector 43 further includes a connecting segment 432, which is connected to both ends of the flexible segment 431.

[0166] In the above technical solution, the connecting section 432 facilitates connection with the heat exchange body 42 and the collector 41.

[0167] Specifically, connecting sections 432 are respectively disposed at both ends of the flexible section 431, and the connecting ends are used to connect with the heat exchange body 42 and the collector 41. The size of the connecting section 432 is adapted to the size of the heat exchange body 42 and the collector 41, which facilitates the connection and installation of the connector 43 with the heat exchange body 42 and the collector 41.

[0168] Optionally, the flexible segment 431 and the connecting segment 432 may be made of the same material, or the flexible segment 431 and the connecting segment 432 may be made of different materials.

[0169] Optionally, in one embodiment, both the flexible segment 431 and the connecting segment 432 are made of metal, and the flexible segment 431 and the connecting segment 432 can be integrally formed or fixedly connected by welding or other methods. In one embodiment, both the flexible segment 431 and the connecting segment 432 are made of flexible materials; for example, the connector 43 includes a rubber hose.

[0170] Optionally, in one embodiment, the flexible segment 431 is made of a flexible material and the connecting segment 432 is made of a metal material. In this way, the metal material facilitates the welding connection of the connector 43 to the heat exchange body 42 and the collector 41, while the flexible material helps to achieve the flexible effect of the connector 43.

[0171] like Figure 9 As shown, the dimensions of the connection between the current collector 41 and the heat exchange body 42 and the connecting section 432 are the same, which facilitates the design, manufacturing and installation of the connecting section 432.

[0172] Please see Figure 4 , Figure 10 and Figure 11 In some embodiments, the heat exchange body 42 includes a main flow channel 421, which includes a first heat exchange channel 423 and a second heat exchange channel 424. The multiple battery cells 10 include a first part 11 and a second part 12. A portion of the heat exchange fluid flows to the first heat exchange channel 423 to exchange heat with the first part 11, and a portion flows to the second heat exchange channel 424 to exchange heat with the second part 12.

[0173] In the above technical solution, the first heat exchange channel 423 and the second heat exchange channel 424 respectively cool the first part 11 and the second part 12 of the battery cell 10, which is beneficial to improving the heat exchange efficiency.

[0174] Specifically, a main flow channel 421 is formed inside the heat exchange body 42, which includes a first heat exchange channel 423 and a second heat exchange channel 424. The first heat exchange channel 423 and the second heat exchange channel 424 are in contact with the first portion 11 and the second portion 12 of the battery cell 10, respectively. The plurality of battery cells 10 include the first portion 11 and the second portion 12.

[0175] The first part 11 and the second part 12 can each be composed of different battery cells 10, for example, Figure 10 As shown, multiple battery cells 10 are arranged in sequence. The first heat exchange channel 423 is in contact with a portion of the battery cells 10, and the second heat exchange channel 424 is in contact with another portion of the battery cells 10.

[0176] Alternatively, the first part 11 and the second part 12 can be composed of different portions of the same battery cell 10. For example, as Figure 11 As shown, multiple battery cells 10 are arranged in sequence. The first heat exchange channel 423 is in contact with a portion of the multiple battery cells 10, and the second heat exchange channel 424 is in contact with another portion of the multiple battery cells 10.

[0177] It should be noted that, Figure 10 and Figure 11 The structure of the battery cell 10 shown is only for illustrating the contact relationship between the first part 11 and the second part 12 and the first heat exchange channel 423 and the second heat exchange channel 424. In other embodiments, the arrangement and shape of the battery cell 10 can be the same as... Figure 10 and Figure 11 The arrangement and shape shown are different.

[0178] Optionally, in one embodiment, the main flow channel 421 may further include three or more branch flow channels, corresponding to each branch flow channel contacting a portion of the battery cell 10 or a portion of the battery cell 10.

[0179] In some embodiments, the inlets of the first heat exchange channel 423 and the second heat exchange channel 424 are respectively connected to the collector 41.

[0180] In the above technical solution, the heat exchange fluid flows to the first heat exchange channel 423 and the second heat exchange channel 424 through the collector 41, which simplifies the heat exchange circuit and allows the heat exchange fluid to flow quickly to the first heat exchange channel 423 and the second heat exchange channel 424, thus improving the heat exchange efficiency.

[0181] Specifically, the heat exchange fluid flows through the collector 41 to the first heat exchange channel 423 and the second heat exchange channel 424 respectively. The rapid flow of the heat exchange fluid to the first heat exchange channel 423 and the second heat exchange channel 424 makes the heat exchange circuit simple and direct, and the heat exchange efficiency high.

[0182] In some embodiments, the main flow channel 421 includes an inlet flow channel 422 and a branch flow channel 425. The inlet of the inlet flow channel 422 is connected to the collector 41, the inlet of the first heat exchange flow channel 423 is connected to the outlet of the inlet flow channel 422, and the second heat exchange flow channel 424 is connected to the outlet of the inlet flow channel 422 through the branch flow channel 425.

[0183] In the above technical solution, the first heat exchange channel 423 is directly connected to the inlet channel 422, the second heat exchange channel 424 is connected to the inlet channel 422 through the branch channel 425, and the inlet channel 422 is connected to the collector 41, which simplifies the connection between the channel and the collector 41, and helps to save installation space and simplify the installation steps.

[0184] Specifically, a main flow channel 421 is formed inside the heat exchange body 42, which includes an inlet flow channel 422, a first heat exchange flow channel 423, and a second heat exchange flow channel 424. The heat exchange fluid flows in through the inlet flow channel 422 and enters the first heat exchange flow channel 423 and the second heat exchange flow channel 424 respectively.

[0185] The inlet channel 422 introduces the heat exchange fluid, which is then diverted to the first heat exchange channel 423 and the second heat exchange channel 424. This allows the heat exchange fluid to exchange heat with different parts of the battery cells 10 simultaneously, increasing the heat exchange area and time, improving heat exchange efficiency, effectively reducing the temperature of the battery pack, ensuring that the battery operates within a suitable temperature range, and extending battery life.

[0186] Please see Figure 4 and Figure 5 In some embodiments, the heat exchange body 42 includes two main flow channels 421, which are symmetrically arranged along the length of the housing 70. The interface includes an inlet interface, and the collector 41 includes an inlet collector 411. The inlet collector 411 includes a first connection port 4111 and a second connection port 4112. The first connection port 4111 is connected to the inlet of the inlet flow channel 422 in a one-to-one correspondence, and the second connection port 4112 is connected to the inlet interface.

[0187] In the above technical solution, the heat exchange fluid enters through an inlet collector 411 and is diverted to two main flow channels 421 to improve the heat exchange efficiency.

[0188] Specifically, in the illustrated embodiment, the inlet collector 411 is connected to the inlets of the two inlet channels 422 one by one through two first connection ports 4111, and then communicates with the inlet interface through the second connection port 4112. The heat exchange fluid enters the collector 41 through the second connection port 4112, and flows to the two main channels 421 through the first connection ports 4111 respectively.

[0189] Two main flow channels 421 are symmetrically arranged along the length of the housing 70. Multiple battery cells 10 can be divided into two groups along the length of the housing 70. Each group is in contact with one main flow channel 421. Each group of battery cells 10 includes a first part 11 and a second part 12. The first heat exchange channel 423 of each main flow channel 421 is in contact with the first part 11, and the second heat exchange channel 424 is in contact with the second part 12. In this way, the heat exchange fluid can be evenly distributed to the symmetrical sides of the multiple battery cells 10, so that each of the multiple battery cells 10 can be cooled more evenly along the length, avoiding local overheating. This helps to improve the consistency and stability of the overall performance of the battery pack and extend the service life of the battery.

[0190] Furthermore, the second connection port 4112 of the inlet collector 411 is connected to two first connection ports 4111, and the two first connection ports 4111 are respectively connected to the inlet flow channels 422 of the two main flow channels 421. The external heat exchange fluid is only connected to the second connection port 4112, which simplifies the connection between the heat exchange component 400 and the external fluid, facilitates installation and reduces the risk of leakage.

[0191] The inlet collector 411 is fixed at the interface of the housing 70. The connector 43 is connected to the first connection port 4111 and the inlet of the inlet channel 422 respectively. The connector 43 can absorb the possible positional error between the first connection port 4111 and the inlet channel 422 by bending, tilting, stretching or compressing, thereby avoiding the squeezing between the heat exchange body 42 and the housing 70.

[0192] In one embodiment, the inlet collector 411 may further include two or more first connection ports 4111, meaning the heat exchange body 42 may include multiple main flow channels 421, with the inlet of each main flow channel 421 connected to a corresponding first connection port 4111. Alternatively, multiple branch flow channels in a main flow channel 421 may each be connected to a first connection port 4111. The multiple first connection ports 4111 communicate with a second connection port 4112, thereby realizing the confluence function of the inlet collector 411.

[0193] In some embodiments, the outlets of the first heat exchange channel 423 and the second heat exchange channel 424 are respectively connected to the collector 41.

[0194] In the above technical solution, the heat exchange fluid flowing through the first heat exchange channel 423 and the second heat exchange channel 424 flows out directly through the collector 41, which can improve the circulation efficiency of the heat exchange fluid.

[0195] Specifically, the outlets of the first heat exchange channel 423 and the second heat exchange channel 424 are respectively connected to the current collector 41. The current collector 41 is connected to the external heat exchange fluid, and the heat exchange fluid after heat exchange with the battery cell 10 flows out quickly. In this way, the heat exchange circuit can be simplified and the heat exchange efficiency can be high.

[0196] In some embodiments, the outlet of the first heat exchange channel 423 is connected to the inlet of the second heat exchange channel 424, and the outlet of the second heat exchange channel 424 is connected to the collector 41.

[0197] In the above technical solution, the two branch flow channels converge, which can reduce the number of outlets of the heat exchange body, simplify the heat exchange circuit, and facilitate installation and connection.

[0198] Specifically, the outlet of the first heat exchange channel 423 is connected to the inlet of the second heat exchange channel 424, and the outlet of the second heat exchange channel 424 is connected to the collector 41, so that the first heat exchange channel 423 and the second heat exchange channel 424 can merge, which can reduce the number of outlets of the heat exchange body 42, simplify the heat exchange circuit, and facilitate installation and connection.

[0199] The outlet of the first heat exchange channel 423 is connected to the inlet of the second heat exchange channel 424. Since the main channel 421 is divided into two heat exchange channels, the temperature change of the heat exchange fluid after passing through the first heat exchange channel 423 is small, and the temperature of the heat exchange fluid in the second heat exchange channel 424 is less affected. At the same time, the heat exchange fluid introduced into the second heat exchange channel 424 through the branch channel 425 will further reduce the influence of the heat exchange fluid in the first heat exchange channel 423 on the fluid in the second heat exchange channel 424. In this way, the cooling efficiency of the heat exchange body 42 can be improved.

[0200] Please see Figure 4 and Figure 5 In some embodiments, the heat exchange body 42 includes two main flow channels 421, which are symmetrically arranged along the length of the housing 70. The interface includes an outlet interface, and the collector 41 includes an outlet collector 412. The outlet collector 412 includes two third connection ports 4121 and a fourth connection port 4122. The two third connection ports 4121 are connected to the outlets of the two outlet flow channels 425 and the second heat exchange flow channel 424 respectively. The fourth connection port 4122 is connected to the outlet interface.

[0201] In the above technical solution, the outlet collector 412 realizes the convergence of the heat exchange fluids flowing out of the two main flow channels 421, making the heat exchange circuit simple.

[0202] Specifically, the two main flow channels 421 are symmetrically arranged along the length of the housing 70, which allows the heat exchange fluid to be distributed more evenly in the battery housing 70. The symmetrical flow channel design ensures that the heat dissipation conditions of multiple battery cells 10 are consistent on both sides along the length of the housing 70, avoiding excessive temperature differences on both sides of the battery pack due to uneven heat dissipation, thereby improving the temperature uniformity of the entire battery pack and helping to improve the overall performance and lifespan of the battery pack.

[0203] The outlet collector 412 is connected to the outlets of the two second heat exchange channels 424 one-to-one through two third connection ports 4121, and then connected to the outlet interface through the fourth connection port 4122 to form a complete heat exchange fluid loop. The two main flow channels 421 converge through the outlet collector 412 and are connected to the external heat exchange fluid through the fourth connection port 4122, which can reduce the number of outlets on the collector 41 and simplify the heat exchange loop.

[0204] In one embodiment, the outlet collector 412 may further include two or more third connection ports 4121, meaning the heat exchange body 42 may include multiple main flow channels 421, with the outlet of each main flow channel 421 connected to a corresponding third connection port 4121. Alternatively, multiple branch flow channels in a main flow channel 421 may each be connected to a third connection port 4121. The multiple third connection ports 4121 communicate with a fourth connection port 4122, thereby achieving the confluence function of the outlet collector 412.

[0205] In some embodiments, the interface includes an inlet interface and an outlet interface, which are located on the same side of the housing 70 along the length direction. The collector 41 includes an inlet collector 411 and an outlet collector 412, which are fixedly connected to the housing 70 so that the inlet collector 411 communicates with the inlet interface and the outlet collector 412 communicates with the outlet interface.

[0206] In the above technical solution, the inlet collector 411, the outlet collector 412 and the corresponding interface are located on the same side of the housing 70, which facilitates the access of external heat exchange fluid.

[0207] Specifically, the housing 70 is provided with an interface section, which includes an inlet interface section and an outlet interface section. The inlet interface section is connected to the second connection port 4112 of the inlet collector 411, and the outlet interface section is connected to the fourth connection port 4122 of the outlet collector 412. In this way, the inlet collector 411 and the outlet collector 412 are fixedly installed on the housing 70 and connected to the heat exchange body 42 through the first connection port 4111 and the third connection port 4121.

[0208] External heat exchange fluid enters the inlet collector 411 through the second connection port 4112, and then enters the two main flow channels 421 through the two first connection ports 4111 respectively, where it exchanges heat with the battery cell 10. In each main flow channel 421, the heat exchange fluid enters through the inlet flow channel 422 and flows to the first heat exchange flow channel 423 and the second heat exchange flow channel 424 respectively. The outlet of the first heat exchange flow channel 423 is connected to the second heat exchange flow channel 424, and the heat exchange fluid flows out through the outlet of the second heat exchange flow channel 424 via the third connection port 4121 and the fourth connection port 4122, thereby forming a heat exchange path.

[0209] The inlet collector 411, the outlet collector 412, and the corresponding interface are located on the same side of the housing 70. This facilitates the unified installation and maintenance of the inlet collector 411, the outlet collector 412, and the corresponding connectors 43. It also allows external heat exchange fluid to be input and output through the same side of the housing 70. This makes the overall structure of the heat exchange assembly 400 simple and occupies less space.

[0210] Please see Figure 4 In some embodiments, the current collector 41 includes a snap fastener 413 that securely connects the inlet current collector 411 and the outlet current collector 412 to fix the relative position between the inlet current collector 411 and the outlet current collector 412.

[0211] In the above technical solution, the inlet collector 411 and the outlet collector 412 are fixedly connected by the buckle 413, which can fix the inlet collector 411 and the outlet collector 412 to each other, making installation convenient.

[0212] Specifically, the clip 413 securely connects the inlet current collector 411 and the outlet current collector 412, thereby fixing their relative positions and facilitating installation onto the interface of the housing 70. Simultaneously, the fixed relative positions of the inlet current collector 411 and the outlet current collector 412 prevent relative displacement due to movement and vibration during the installation, processing, and transportation of the battery device 100, thus avoiding any impact on the installation stability of the inlet current collector 411 and the housing 70 and the heat exchanger body 42.

[0213] In some embodiments, the heat exchange body 42 includes one of a heat exchange plate and a heat exchange tube.

[0214] In the above technical solution, the form of the heat exchange body 42 can be flexibly selected according to the layout of the battery cell 10.

[0215] Optionally, in some embodiments, the heat exchange body 42 includes a heat exchange plate that can form a relatively uniform heat dissipation plane on the bottom surface of the battery, making the temperature of each part of the bottom surface of the battery more uniform and avoiding local overheating. The heat exchange plate makes full contact with the bottom surface of the battery, which can increase the heat dissipation area and effectively improve heat dissipation efficiency. Since the battery cell 10 generates heat during charging and discharging, the heat exchange plate can quickly transfer the heat away, preventing the battery cell 10 from overheating, ensuring the stability and safety of the battery cell 10's performance, and helping to extend the service life of the battery device 100.

[0216] Furthermore, a heat exchange channel is formed inside the heat exchange plate. The plate structure protects the heat exchange channel and has good compactness, which can adapt to battery devices 100 of different shapes and sizes, saving space and facilitating integration into battery devices 100 of various models and sizes.

[0217] Optionally, in the illustrated embodiment, the heat exchange body 42 includes heat exchange tubes, which can be flexibly arranged according to the specific structure and heat dissipation requirements of the battery device 100. For example, the heat exchange tubes can be bent into different shapes and wrapped around the battery cells 10 or arranged between the battery cells 10 to more precisely control the heat dissipation path and heat dissipation effect, adapting to the complex layout of the battery device 100.

[0218] In some embodiments, the heat exchange tubes are flat.

[0219] In the above technical solution, it is beneficial to increase the contact area between the heat exchange tube and the battery cell 10.

[0220] Specifically, the flat heat exchange tube has a larger contact area with the battery cell 10, enabling it to absorb the heat generated by the battery cell 10 more effectively. Compared to a circular heat exchange tube, the flat shape provides more heat dissipation surface in the same space, making heat transfer more efficient, which helps to reduce the battery temperature and improve battery performance and lifespan.

[0221] Furthermore, the flattened channel allows for more uniform flow of the cooling medium within the pipe, reducing dead zones and localized hot spots. The more regular flow path of the cooling medium within the flattened pipe better achieves laminar or turbulent flow, improving the heat transfer coefficient and enhancing heat dissipation. Simultaneously, uniform fluid flow helps prevent uneven heat dissipation caused by excessively fast or slow flow rates in localized areas.

[0222] Furthermore, the flat heat exchange tubes are more suitable for compact battery layouts, as they can better conform to the shape of the battery's bottom surface and adapt to battery modules of different sizes and shapes. Within a limited space, the heat exchange tubes can be arranged more rationally, improving space utilization and making the structure of the battery device 100 more compact.

[0223] In summary, the heat exchange body 42 adds a branch flow channel to the inlet flow channel 422, which allows the heat exchange fluid to be distributed inside the heat exchange body 42, making the cooling of the battery cells 10 more uniform, reducing the temperature difference between multiple battery cells 10, which is conducive to improving the driving range, and at the same time achieving the effect of energy saving and efficiency improvement.

[0224] A flexible connector 43 is added between the current collector 41 and the heat exchange body 42, so that after the current collector 41 is installed in the housing 70, the assembly between the housing 70 and the heat exchange body 42 is improved from a rigid connection to a flexible connection. This increases the assemblability of the heat exchange body 42 and the housing 70, reduces the stress on the heat exchange body 42, and improves the leakage resistance and reliability of the battery device 100.

[0225] Secondly, the energy storage device provided in this application includes a plurality of battery devices 100 according to any of the above embodiments, the battery devices 100 being used to store or provide electrical energy.

[0226] This application provides an energy storage device including one or more battery clusters to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0227] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0228] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0229] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0230] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0231] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device via piping to regulate the temperature of the individual battery cells.

[0232] As an example, the main control module can serve as the battery management unit for the battery cluster, used to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power, or temperature of the battery cluster. For instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0233] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0234] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0235] As an example, the power distribution unit can be used to distribute power to the power modules of the energy storage device.

[0236] Thirdly, the electrical device provided in this application includes the battery device 100 of any of the above embodiments, or the energy storage device of the above embodiments.

[0237] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery cells 10, such as electric vehicles, electric toys, power tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0238] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: The enclosure has an interface for communicating with the outside. Multiple battery cells are arranged inside the housing; A heat exchange assembly is disposed inside the housing. The heat exchange assembly includes a current collector, a heat exchange body, and a connector. The heat exchange body is configured to exchange heat with the battery cell. The current collector is connected to the interface section; The connector connects the heat exchange body and the collector, and the connector is flexible.

2. The battery device according to claim 1, characterized in that, The plurality of battery cells are arranged along a first direction, or the plurality of battery cells are arranged along a second direction, wherein the first direction is perpendicular to the second direction, and the length direction of the heat exchange body is parallel to the first direction or the second direction.

3. The battery device according to claim 1, characterized in that, The heat exchange surface of the heat exchange body contacts the side of the battery cell to exchange heat with the battery cell.

4. The battery device according to claim 3, characterized in that, The side of the battery cell includes a first surface that contacts other battery cells along the battery cell arrangement direction and a second surface that is perpendicular to the first surface. The heat exchange surface of the heat exchange body contacts the first surface, or the heat exchange surface of the heat exchange body contacts the second surface.

5. The battery device according to any one of claims 1-4, characterized in that, The interface section includes an inlet section and an outlet section, the inlet section and the outlet section being located on the same side of the housing along its length, or; The inlet and outlet are located at opposite ends of the housing along its length.

6. The battery device according to claim 1, characterized in that, The connector includes a flexible segment that is configured to deform without breaking under external force.

7. The battery device according to claim 6, characterized in that, The flexible section includes a metal connecting pipe, which includes one of a corrugated pipe, a telescopic pipe, and a hinged pipe.

8. The battery device according to claim 7, characterized in that, The elastic modulus of the metal connecting pipe is in the range of [100GPa, 250GPa].

9. The battery device according to claim 6, characterized in that, The flexible segment includes a flexible connecting pipe, which includes one of the following: an elastic hose, a corrugated pipe, a telescopic pipe, and a hinged pipe.

10. The battery device according to claim 9, characterized in that, The elastic modulus of the flexible connecting tube ranges from [0.2 GPa, 5 GPa].

11. The battery device according to any one of claims 6-10, characterized in that, The connector further includes connecting segments, which are respectively connected to both ends of the flexible segment.

12. The battery device according to claim 1, characterized in that, The heat exchange body includes a main flow channel, which includes a first heat exchange channel and a second heat exchange channel. The plurality of battery cells include a first part and a second part. A portion of the heat exchange fluid flows to the first heat exchange channel to exchange heat with the first part, and a portion flows to the second heat exchange channel to exchange heat with the second part.

13. The battery device according to claim 12, characterized in that, The inlets of the first heat exchange channel and the second heat exchange channel are respectively connected to the collector.

14. The battery device according to claim 12, characterized in that, The main flow channel includes an inlet flow channel and a branch flow channel. The inlet of the inlet flow channel is connected to the collector, the inlet of the first heat exchange flow channel is connected to the outlet of the inlet flow channel, and the second heat exchange flow channel is connected to the outlet of the inlet flow channel through the branch flow channel.

15. The battery device according to claim 13 or 14, characterized in that, The heat exchanger body includes two main flow channels, which are symmetrically arranged along the length of the housing. The interface includes an inlet interface, and the collector includes an inlet collector. The inlet collector includes a first connection port and a second connection port. The first connection port is connected to the inlet of the inlet flow channel, and the second connection port is connected to the inlet interface.

16. The battery device according to claim 12, characterized in that, The outlets of the first heat exchange channel and the second heat exchange channel are respectively connected to the collector.

17. The battery device according to claim 12, characterized in that, The outlet of the first heat exchange channel is connected to the inlet of the second heat exchange channel, and the outlet of the second heat exchange channel is connected to the collector.

18. The battery device according to claim 16 or 17, characterized in that, The heat exchanger body includes two main flow channels, which are symmetrically arranged along the length of the housing. The interface includes an outlet interface, and the collector includes an outlet collector. The outlet collector includes a third connection port and a fourth connection port. The third connection port is connected to the outlet of the second heat exchange flow channel in a one-to-one correspondence, and the fourth connection port is connected to the outlet interface.

19. The battery device according to claim 12, characterized in that, The interface includes an inlet and an outlet, which are located on the same side of the housing along its length. The current collector includes an inlet current collector and an outlet current collector, which are fixedly connected to the housing so that the inlet current collector communicates with the inlet and the outlet current collector communicates with the outlet.

20. The battery device according to claim 19, characterized in that, The current collector includes a clip that securely connects the inlet current collector and the outlet current collector to fix their relative positions.

21. The battery device according to claim 1, characterized in that, The heat exchanger body includes one of a heat exchange plate and a heat exchange tube.

22. The battery device according to claim 21, characterized in that, The heat exchange tube is flat.

23. An energy storage device, characterized in that, The battery device includes any one of claims 1-22, the battery device being used to store or provide electrical energy.

24. An electrical appliance, characterized in that, Includes the battery device according to any one of claims 1-22, or the energy storage device according to claim 23.

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