Battery device and electric appliance

Abstract

This application discloses a battery device and an electrical appliance, relating to the field of batteries. The battery device includes a housing, a battery cell assembly, a first heat exchange plate, and a first connector. The first heat exchange plate includes a first main body and a first sealing member. The first main body extends along a first direction and abuts against the battery cell assembly. The first main body has a first opening and a second opening that are opposite to each other along the first direction and communicate with each other. The first sealing member is disposed inside the first opening and the second opening respectively, for sealing the first opening and the second opening to form a heat exchange channel inside the first main body. The first connector passes through the first main body and the first sealing member to connect the first heat exchange plate and the housing. This battery device can improve the structural strength and heat exchange effect of the heat exchange device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device and an electrical appliance. Background Technology

[0002] With the rapid development of new energy technologies, batteries are increasingly widely used in electric vehicles, energy storage systems, and other fields. Batteries generate a large amount of heat during charging and discharging. If this heat cannot be dissipated effectively and in a timely manner, it will lead to uneven temperature distribution within the battery pack, affecting battery performance and lifespan, and even posing safety hazards. Existing battery heat exchange devices have certain shortcomings in structural design and heat dissipation capacity, failing to meet the growing demand for heat dissipation from high-performance batteries. Utility Model Content

[0003] This application provides a battery device and electrical equipment that can improve the structural strength and heat exchange effect of the heat exchange structure.

[0004] In a first aspect, this application provides a battery device, comprising: a housing having a receiving space; a battery cell assembly including a plurality of battery cells arranged along a first direction and housed in the receiving space; a first heat exchange plate housed in the receiving space, the first heat exchange plate including a first main body and a first sealing member, the first main body extending along the first direction and abutting against the battery cell assembly, the first main body having a first opening and a second opening, the first opening and the second opening being disposed opposite to each other along the first direction and communicating with each other, the first sealing member being disposed inside the first opening and the second opening respectively, the first sealing member being used to seal the first opening and the second opening to form a heat exchange channel inside the first main body; and a first connector passing through the first main body and the first sealing member to connect the first heat exchange plate and the housing.

[0005] In the technical solution of this application embodiment, the first sealing member seals the first opening and the second opening of the first main body to prevent heat exchanger leakage, increase the sealing performance at the first and second openings, and simultaneously increase the structural strength of the first heat exchange plate by utilizing its structural strength. The first main body of the first heat exchange plate abuts against the battery cell assembly, and a heat exchange channel is formed inside it, in which the heat exchanger can flow, effectively removing the heat generated by the battery cell and reducing the possibility of battery performance degradation or shortened lifespan due to overheating. The first connecting member passes through the first main body and the first sealing member, connecting the first heat exchange plate to the housing, enabling the heat exchange plate to exchange heat with the battery cell assembly inside the housing. In addition to the heat exchange function, it also provides a certain degree of support and limitation for the battery cell assembly. During the operation of the battery device, it assists the battery cell assembly in bearing a certain amount of load, improving the stability and reliability of the battery device. At the same time, the structural strength of the first sealing member supports the first main body, making the connection between the first main body and the first connecting member less prone to deformation and the connection more stable.

[0006] In some embodiments of the first aspect, the housing includes a frame, a cover, and a bottom plate. The cover and the bottom plate are respectively connected to both sides of the frame along a second direction. The bottom plate, the frame, and the cover together form an accommodating space. The first heat exchange plate is connected to the frame through a first connector. The second direction is the thickness direction of the bottom plate and is perpendicular to the first direction.

[0007] In this embodiment, the frame, cover, and base plate cooperate with each other to provide stable support and good protection. The first connector connects the first heat exchange plate to the frame, which improves the connection strength between the first heat exchange plate and the housing, improves the stability of the heat exchange plate position, and makes heat transfer efficient and stable. This improves the structural strength, heat dissipation efficiency and reliability of the battery device, and extends the service life of the battery device.

[0008] In some embodiments of the first aspect, the battery device further includes a plurality of first heat exchange plates and a plurality of battery cell assemblies arranged along a third direction, wherein the first walls of two adjacent battery cells abut against the same first heat exchange plate; wherein the first wall is a wall of the battery cell parallel to the first direction and the third direction and close to the side of the base plate, and the first direction, the second direction and the third direction are perpendicular to each other.

[0009] In this embodiment, by arranging multiple first heat exchange plates and battery cell assemblies along a third direction, the first walls of adjacent battery cells abut against the same first heat exchange plate. A single first heat exchange plate can simultaneously absorb heat generated by battery cells on both sides, increasing the heat dissipation contact area, significantly improving heat conduction efficiency, and enhancing the heat dissipation performance of the battery device. The first heat exchange plates provide support for the battery cells, bearing the weight of the battery cell assembly together with the frame. The multiple first heat exchange plates and battery cell assemblies are arranged in an alternating pattern, making full use of the internal space of the battery device and improving space utilization.

[0010] In some embodiments of the first aspect, the frame includes a frame portion and a first beam and a second beam disposed opposite to each other along a first direction. The first beam is located at a first opening, and the second beam is located at a second opening. The first beam and the second beam are connected to the frame portion. A first heat exchange plate is connected to the first beam at the first opening via a first connector, and the first heat exchange plate is connected to the second beam at the second opening via a first connector.

[0011] In this embodiment, the first heat exchange plate is connected to the first beam and the second beam at its two end openings, respectively. The frame provides stable support for the first heat exchange plate, effectively limiting its displacement in all directions and ensuring that the first heat exchange plate remains in contact with the battery cell assembly for heat conduction. Since the first beam and the second beam are located at the first and second openings, respectively, they protect the heat exchange channels inside the first heat exchange plate, preventing deformation or damage due to external forces and ensuring the normal operation of the heat exchange system.

[0012] In some embodiments of the first aspect, the battery device further includes a second heat exchange plate, which is located between the frame and the battery cell assembly adjacent to the frame in a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular.

[0013] In this embodiment, the addition of a second heat exchange plate, based on the first heat exchange plate, creates an additional heat dissipation channel for the battery device. Heat generated by the individual battery cells adjacent to the frame can be dissipated through the second heat exchange plate. This multi-path heat dissipation design improves the overall heat dissipation capacity of the battery device, reduces the operating temperature of the individual battery cells, and minimizes battery performance degradation and shortened lifespan caused by overheating.

[0014] In some embodiments of the first aspect, the second heat exchange plate includes a second main body and a second sealing member. The second sealing member includes a sealing portion, an extension portion, and a connecting portion. The sealing portion is located inside the second main body. The extension portion is connected to the side of the sealing portion away from the second main body and extends along a first direction. The connecting portion is connected to the side of the extension portion facing the receiving space and extends along a third direction. The battery device also includes a second connector that passes through the connecting portion to connect the second heat exchange plate and the frame.

[0015] In this embodiment, the design of the extension and connecting portion of the second sealing member enables a stable connection structure between the second heat exchange plate and the frame. The connecting portion is connected to the frame through the second connecting member, which can withstand the external forces such as vibration and impact experienced by the battery device during operation, reducing the possibility of displacement or loosening of the second heat exchange plate and improving the stability and reliability of the battery device structure.

[0016] In some embodiments of the first aspect, the frame includes a beam and a support portion, the support portion being connected to the side of the beam facing the receiving space and extending along a third direction, the height of the support portion along the second direction being lower than that of the beam; wherein, a second heat exchange plate is inserted through the connection portion via a second connector, connecting the support portion of the frame.

[0017] In this embodiment, the frame support is designed to provide a connection structure for the second heat exchange plate, capable of withstanding the forces generated by the second heat exchange plate and the battery cell assembly during operation. The second heat exchange plate is connected to the support via a second connector, reducing the possibility of displacement or loosening of the second heat exchange plate when the battery device is subjected to external forces such as vibration or impact, and enhancing the connection strength between the second heat exchange plate and the frame. The tight connection between the second heat exchange plate and the frame support ensures good contact between the second heat exchange plate and the battery cell assembly, allowing heat to be quickly transferred from the battery cell assembly to the second heat exchange plate, thus enhancing the heat dissipation capacity of the battery device.

[0018] In some embodiments of the first aspect, the first heat exchange plate further includes a first partition extending along a first direction, the first partition being disposed inside the first main body portion, the first partition being sealed to a first sealing member located at a first opening and spaced apart from a first sealing member located at a second opening, so as to divide the heat exchange channel into an inlet channel and an outlet channel that are interconnected.

[0019] In this embodiment, the first partition divides the heat exchange channel into interconnected inlet and outlet channels, creating a unidirectional and orderly flow path for the cooling medium within the heat exchange plate. This facilitates the distribution of the cooling medium within the first heat exchange plate. It also allows the cooling medium to diffuse evenly to all areas in the inlet channel, ensuring full contact with the individual battery cells and preventing insufficient local heat dissipation or overcooling, thus improving the uniformity of the battery pack's temperature field.

[0020] In some embodiments of the first aspect, the first heat exchange plate further includes a plurality of second partitions arranged along a third direction. The second partitions are disposed inside the first main body and extend along the first direction. The second partitions are spaced apart from the first sealing members at the first opening and the second opening, respectively, so as to divide the liquid inlet channel and / or liquid outlet channel into a plurality of channels. The third direction is perpendicular to the first direction and perpendicular to the thickness direction of the first heat exchange plate.

[0021] In this embodiment, multiple second baffles divide the inlet and / or outlet channels into multiple sub-channels, so that the heat exchange medium is evenly distributed in the first heat exchange plate. This avoids insufficient local heat dissipation caused by uneven flow in a single channel. Through the dispersed and converged flow path, each area of ​​the battery cell module is in full contact with the heat exchange medium, thereby improving the uniformity of the battery pack temperature field and enhancing the consistency of battery performance.

[0022] In some embodiments of the first aspect, the first partition and the second partition are made of thermally conductive materials and are sealed to the first main body in the second direction; wherein the first partition and the second partition are inclined relative to the second direction; and / or the surfaces of the first partition, the second partition and the inner wall of the first main body include heat dissipation portions that protrude toward the interior of the first main body; the first direction, the second direction and the third direction are perpendicular to each other.

[0023] In this embodiment, the inclined arrangement of the first and second partitions, their shared heat dissipation structure with the inner wall surface of the first main body, or a combination of both, can increase the contact area between the heat exchange medium and the first main body, improve the heat dissipation efficiency of the first heat exchange plate, reduce the operating temperature of the battery cell assembly, and ensure stable battery performance. The sealed connection between the first and second partitions and the first main body enhances the overall structural strength of the first heat exchange plate and strengthens its ability to withstand external forces such as vibration and impact during battery operation.

[0024] In some embodiments of the first aspect, the first heat exchange plate further includes an inlet and an outlet located at the second opening. The inlet is connected to an inlet channel, and the outlet is connected to an outlet channel. The inlet and outlet are spaced apart from each other along a first direction and also spaced apart from each other along a third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the thickness direction of the first heat exchange plate.

[0025] In this embodiment, the inlet and outlet are spaced apart from each other along a first direction, allowing them to connect to the inlet and outlet channels respectively, thus enabling the heat exchanger to form an orderly flow path within the heat exchange plate. The inlet and outlet are also spaced apart along a third direction, allowing the pipes transporting the heat exchanger to the inlet and outlet to be arranged in parallel. This avoids space waste and clutter caused by staggered pipe arrangements, and prevents the pipes from occupying space in the second direction, thereby improving the space utilization of the battery device.

[0026] In some embodiments of the first aspect, the battery device further includes an inlet pipe connected to an inlet; and an outlet pipe connected to an outlet; wherein the projection of the inlet pipe and / or the outlet pipe toward the second direction at least partially coincides with the first connector.

[0027] In this embodiment, the design of the liquid inlet pipe and / or liquid outlet pipe overlapping with the projection of the first connector makes full use of the space above the first connector, avoids the waste of space caused by the arbitrary arrangement of pipes inside the battery device, makes the internal structure of the battery device more compact, and reserves space for the installation of other components or the arrangement of larger capacity battery cells without increasing the external size of the device.

[0028] In some embodiments of the first aspect, the first sealing element is connected to the first body portion by welding.

[0029] In this embodiment, the first sealing element and the first heat exchange plate are integrated through welding. Welding eliminates gaps between the sealing element and the heat exchange plate, improves the sealing performance of the first heat exchange plate at the first and second openings, prevents leakage of the heat exchange medium, and allows the heat exchange medium in the heat exchange channel to flow according to the channel arrangement, ensuring the smooth operation of the heat dissipation system. Welding also firmly bonds the first sealing element to the first main body, enhancing the overall structural strength and stability of the first heat exchange plate.

[0030] Secondly, this application provides an electrical device, including the battery device of the first aspect, the battery device being used to provide electrical energy.

[0031] In some embodiments, the electrical equipment is a vehicle, a ship, or a spacecraft. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the vehicle structure according to an embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the battery device according to an embodiment of this application;

[0034] Figure 3 This is a structural diagram of the first heat exchange plate according to an embodiment of this application;

[0035] Figure 4 This is an exploded view of the battery device according to an embodiment of this application;

[0036] Figure 5 This is a partial schematic diagram of a battery device according to an embodiment of this application;

[0037] Figure 6 This is another schematic diagram of the battery device according to an embodiment of this application;

[0038] Figure 7 This is a schematic diagram of the second sealing component according to an embodiment of this application;

[0039] Figure 8 This is another structural diagram of the first heat exchange plate according to an embodiment of this application;

[0040] Figure 9 This is an internal structural diagram of the first heat exchange plate in an embodiment of this application;

[0041] Figure 10 This is another internal structural diagram of the first heat exchange plate in an embodiment of this application;

[0042] Figure 11 This is a partial top view of the first heat exchange plate according to an embodiment of this application;

[0043] Figure 12 This is another schematic diagram of the battery device according to an embodiment of this application.

[0044] The accompanying drawings are not drawn to scale.

[0045] Figure label:

[0046] 1000 - Vehicle; 100 - Battery unit; 10 - Housing; 101 - Cover; 102 - Frame; 1021 - First beam; 1022 - Second beam; 1023 - Frame part; 103 - Base plate; 20 - Battery cell assembly; 201 - Battery cell; 30 - First heat exchange plate; 301 - First main body part; 3011 - First partition; 3012 - Second partition; 302 - First sealing element; 303 - Liquid inlet; 304 - Liquid outlet; 305 - Liquid inlet pipe; 306 - Liquid outlet pipe; 40 - First connecting element; 50 - Second heat exchange plate; 501 - Second sealing element; 5011 - Sealing part; 5012 - Extension part; 5013 - Connecting part; 200 - Motor; 300 - Controller. Detailed Implementation

[0047] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0049] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0051] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0052] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0053] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0054] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0055] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0056] 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.

[0057] 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.

[0058] The battery device 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, which are connected in series, parallel, or mixed connections via a busbar.

[0059] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0060] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0061] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cell assemblies housed within the housing.

[0062] As an example, the battery cell assembly can be a battery module, which can be housed in a battery housing by fixing the battery module in the housing.

[0063] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0064] As an example, the enclosure may include a first enclosure section and a second enclosure section. The first enclosure section and the second enclosure section are fastened together to form a closed space inside the enclosure for housing the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first enclosure section may be a top cover or a bottom plate.

[0065] As an example, the enclosure may include a top cover, a frame, and a bottom plate. The top cover and bottom plate are connected to the frame, creating an enclosed space inside the battery enclosure to house individual battery cells.

[0066] In some embodiments, the housing may be part of the vehicle's chassis structure. For example, a portion of the housing may be at least a part of the vehicle's floor, or a portion of the housing may be at least a part of the vehicle's crossbeams and longitudinal beams.

[0067] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also extensively used in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as in military equipment and aerospace. With the continuous expansion of power battery applications, market demand is also constantly increasing.

[0068] Batteries generate a significant amount of heat during charging and discharging. If this heat cannot be dissipated effectively and promptly, it can lead to uneven temperature distribution within the battery pack, affecting battery performance and lifespan, and even posing safety hazards. Existing battery heat exchange devices have certain shortcomings in structural design and heat dissipation capacity, failing to meet the ever-increasing heat dissipation demands of high-performance batteries.

[0069] Based on the above considerations, this application provides a battery device that can improve the structural strength and heat exchange effect of the heat exchange structure. The battery device provided in this application includes a housing, a battery cell assembly, a first heat exchange plate, and a first connector. The housing forms a receiving space; the battery cell assembly includes multiple battery cells arranged along a first direction and housed within the receiving space; the first heat exchange plate is housed within the receiving space and includes a first main body and a first sealing member. The first main body extends along the first direction and abuts against the battery cell assembly. The first main body has a first opening and a second opening, which are opposite to each other along the first direction and communicate with each other. The first sealing member is disposed inside the first opening and the second opening, and is used to seal the first opening and the second opening to form a heat exchange channel inside the first main body; the first connector passes through the first main body and the first sealing member to connect the first heat exchange plate and the housing.

[0070] In this embodiment, the first sealing member seals the first opening and the second opening of the first main body to prevent heat exchanger leakage, increase the sealing performance at the first and second openings, and simultaneously increase the structural strength of the first heat exchange plate. The first main body of the first heat exchange plate abuts against the battery cell assembly, and a heat exchange channel is formed inside it, through which the heat exchanger can flow, effectively removing the heat generated by the battery cell and reducing the possibility of performance degradation or shortened lifespan due to overheating. The first connecting member passes through the first main body and the first sealing member, connecting the first heat exchange plate to the housing, enabling the heat exchange plate to exchange heat with the battery cell assembly inside the housing. In addition to its heat exchange function, it also provides some support and restraint for the battery cell assembly. During the operation of the battery device, it assists the battery cell assembly in bearing certain loads, improving the stability and reliability of the battery device. At the same time, the structural strength of the first sealing member supports the first main body, making the connection between the first main body and the first connecting member less prone to deformation and resulting in a more stable connection.

[0071] The technical solutions described in this application are applicable to various electrical devices that use battery devices. These electrical devices can be vehicles, mobile phones, portable devices, laptops, ships, spacecraft, electric toys, and power tools, etc. Vehicles can be gasoline-powered cars, natural gas-powered cars, or new energy vehicles; new energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. Spacecraft include airplanes, rockets, space shuttles, and spacecraft, etc. Electric toys include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Power tools include metal cutting power tools, grinding power tools, assembly power tools, and railway power tools, such as electric drills, electric grinders, electric wrenches, electric screwdrivers, electric hammers, impact drills, concrete vibrators, and electric planers, etc. This application does not impose any special limitations on the above-mentioned electrical devices.

[0072] For ease of explanation, the following embodiments use a vehicle as an example of electrical equipment.

[0073] For example, Figure 1 This is a structural schematic diagram of the vehicle according to an embodiment of this application. Figure 1As shown, vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100, a motor 200, and a controller 300 can be installed inside vehicle 1000. The controller 300 controls the power supply from the battery device 100 to the motor 200. For example, the battery device 100 can be installed at the bottom, front, or rear of vehicle 1000. The battery device 100 can be used to power vehicle 1000; for example, it can serve as the operating power source for vehicle 1000's electrical system, such as for the power requirements of starting, navigation, and operation. In another embodiment of this application, the battery device 100 can not only serve as the operating power source for vehicle 1000 but also as the driving power source, replacing or partially replacing gasoline or natural gas to provide driving force for vehicle 1000.

[0074] Figure 2 This is a schematic diagram of the battery device according to an embodiment of this application. Figure 2 As shown, the battery device 100 of this application embodiment may include a plurality of battery cells 20 to meet different power usage needs. It should be understood that, as Figure 2 As shown, the battery device 100 in this embodiment may further include a housing 10.

[0075] The housing 10 may include two parts, referred to herein as a first housing section and a second housing section, which are fastened together. The shapes of the first and second housing sections can be determined according to the shapes of the components housed inside, for example, according to the shape of the combination of multiple battery cells 20 housed inside. At least one of the first and second housing sections has an opening. For example, both the first and second housing sections can be hollow cuboids with one face as an opening. The openings of the first and second housing sections are arranged opposite to each other, and the first and second housing sections are fastened together to form a housing 10 with a closed chamber, which can be used to house multiple battery cells 20. The multiple battery cells 20 are connected in parallel, series, or mixed configurations and placed inside the housing 10 formed by the fastening of the first and second housing sections.

[0076] For example, one of the first and second housing sections may be a hollow cuboid with an opening, while the other is plate-shaped to cover the opening. Taking the second housing section as a hollow cuboid with one opening and the first housing section as plate-shaped as an example, the first housing section covers the opening of the second housing section to form a housing 10 with a closed chamber, which can be used to accommodate multiple battery cells 20.

[0077] Figure 3This is a structural diagram of the first heat exchange plate according to an embodiment of this application. (In conjunction with...) Figure 2 With Figure 3 As shown, the battery device 100 may include a housing 10, a battery cell assembly 20, a first heat exchange plate 30, and a first connector 40. The housing 10 forms a receiving space. The battery cell assembly 20 includes a plurality of battery cells 201 arranged along a first direction and received in the receiving space. The first heat exchange plate 30 is received in the receiving space and includes a first main body 301 and a first sealing member 302. The first main body 301 extends along the first direction and abuts against the battery cell assembly 20. The first main body 301 has a first opening and a second opening. The first opening and the second opening are arranged opposite to each other along the first direction and are interconnected. The first sealing member 302 is disposed inside the first opening and the second opening respectively. The first sealing member 302 is used to seal the first opening and the second opening to form a heat exchange channel inside the first main body 301. The first connector 40 passes through the first main body 301 and the first sealing member 302 to connect the first heat exchange plate 30 and the housing 10.

[0078] In some embodiments, the housing 10 is the outer shell structure of the battery device 100, which is made of a high-strength material with certain thermal insulation properties, such as aluminum alloy or high-strength engineering plastic. An enclosed receiving space is formed inside, which is used to accommodate components such as the battery cell assembly 20 and the first heat exchange plate 30.

[0079] The shape and size of the housing 10 can be designed according to the actual application scenario and battery capacity requirements. The housing 10 is provided with multiple mounting holes or connection structures for connecting and fixing with the first heat exchange plate 30 or other components.

[0080] The casing 10 of this application embodiment may be made of one or more materials. For example, it may include high-strength metal materials, such as aluminum alloys and steel, to provide good structural strength and stability and ensure the safety of the battery in various environments; it may also include non-metallic materials with excellent insulation properties, such as engineering plastics, to reduce the possibility of safety hazards such as battery leakage; it may also include materials with good thermal conductivity to facilitate heat dissipation during battery operation and maintain the normal operating temperature of the battery.

[0081] The battery cell assembly 20 is the structure of the battery device 100 that enables the storage and release of electrical energy. It is installed in the housing space by a fixed structure. During the operation of the battery cell 201, heat is generated. The battery device 100 dissipates heat from the battery cell 201 through a heat exchange structure.

[0082] The heat exchange structure includes a first heat exchange plate 30. The first main body 301 of the first heat exchange plate 30 extends along a first direction and is adapted to the arrangement direction of the battery cells 201. It abuts against the battery cells 201 and contacts the wall of the battery cells 201 to achieve heat conduction between the battery cells 201 and the battery cells 201.

[0083] In some embodiments, the first body portion 301 may be made of a material with high thermal conductivity, such as copper or aluminum, to improve heat transfer efficiency.

[0084] The first main body 301 has a first opening and a second opening, which are arranged opposite to each other along a first direction and are interconnected. A channel structure connecting the first opening and the second opening is formed inside the first main body 301 through a processing or molding process, thereby forming a heat exchange channel inside the first main body 301.

[0085] Specifically, the first main body 301 is made of aluminum and milled to form an internally reinforced structure. Then, the internal ribs near the first and second openings are milled to create an edge rib that is a certain distance from the first and second openings. After milling, the first and second openings are sealed with the first sealing member 302.

[0086] During the operation of the battery device 100, the heat generated by the battery cell assembly 20 is transferred to the first main body 301 of the first heat exchange plate 30 through heat conduction. The heat exchange medium enters the heat exchange channel, absorbs the heat of the first main body 301 during the flow in the channel, and then flows out, thereby achieving heat dissipation for the battery cell assembly 20.

[0087] The first opening and the second opening are arranged opposite to each other along the first direction and are interconnected to form a flow channel for the heat exchanger. The heat exchanger can enter from the first opening and flow out from the second opening, or a return channel can be provided inside the first main body 301, that is, the heat exchanger can enter from the first opening, pass through the second opening, flow back to the first opening, and flow out from the first opening.

[0088] The first sealing element 302 is installed inside the first opening and the second opening respectively, thereby creating a heat exchange channel inside the first main body 301, that is, the heat exchanger cannot flow out from other places except for the liquid inlet 303 and the liquid outlet 304.

[0089] The first sealing element 302 is made of corrosion-resistant materials, such as stainless steel or engineering plastics, and can also enhance the structural strength of the first opening and the second opening, thereby enhancing the structural strength of the first heat exchange plate 30.

[0090] In some embodiments, a first connector 40 passes through the first main body 301 and the first sealing member 302 to connect the first heat exchange plate 30 and the housing 10. The first connector 40 may be a bolt, screw, or other type of connecting component. Corresponding connecting holes are provided on the first main body 301 and the first sealing member 302, and the first connector 40 passes through these connecting holes to be connected and fixed with threaded holes or connecting structures on the housing 10.

[0091] Specifically, after the first main body 301 and the first sealing member 302 are processed, a connecting hole can be milled at the position corresponding to the first sealing member 302. In order to facilitate the installation of the first connecting member 40, a riveting step can also be milled.

[0092] In this embodiment, the first heat exchange plate 30 and the battery cell assembly 20 can be connected by adhesive bonding or thermal fusion.

[0093] In addition, for ease of description, the embodiments of this application define three reference directions based on the battery device 100. The extension direction of the first heat exchange plate 30 and the arrangement direction of the battery cells 201 in the battery cell assembly 20 are the X direction, i.e. the first direction. Figure 2 The arrangement direction of the battery cell assembly 20 is the Y direction, i.e., the third direction; the direction perpendicular to both the X and Y directions is the Z direction, i.e., the second direction. The X, Y, and Z directions are perpendicular to each other.

[0094] In this embodiment, the first sealing member 302 seals the first opening and the second opening of the first main body 301 to prevent heat exchanger leakage, increase the sealing performance at the first and second openings, and simultaneously increase the structural strength of the first heat exchange plate 30 by utilizing its structural strength. The first main body 301 of the first heat exchange plate 30 abuts against the battery cell assembly 20, and a heat exchange channel is formed inside it, in which the heat exchanger can flow, effectively removing the heat generated by the battery cell 201 and reducing the possibility of battery performance degradation or shortened lifespan due to overheating. The first connector 40 passes through the first main body 301 and the first sealing member 302, connecting the first heat exchange plate 30 to the housing 10. This allows the first heat exchange plate 30 to exchange heat with the battery cell assembly 20 inside the housing 10. In addition to its heat exchange function, it also provides some support and limit for the battery cell assembly 20. During the operation of the battery device 100, it helps the battery cell assembly 20 withstand certain loads, thus improving the stability and reliability of the battery device 100. At the same time, the structural strength of the first sealing member 302 supports the first main body 301, making the connection between the first main body 301 and the first connector 40 less prone to deformation and resulting in a more stable connection.

[0095] Figure 4 This is an exploded view of a battery device according to an embodiment of this application. Figure 4As shown, the housing 10 includes a frame 102, a cover 101, and a bottom plate 103. The cover 101 and the bottom plate 103 are respectively connected to both sides of the frame 102 along the second direction. The bottom plate 103, the frame 102, and the cover 101 together form an accommodating space. The first heat exchange plate 30 is connected to the frame 102 through a first connector 40. The second direction is the thickness direction of the bottom plate 103 and is perpendicular to the first direction.

[0096] It should be understood that the battery cell assembly 20 is located between the cover 101 and the first heat exchange plate 30. To make the positional relationship between the various structures clearer, Figure 4 Not shown in the image.

[0097] In some embodiments, the frame 102 may include two third and fourth openings disposed opposite each other along a second direction, the third and fourth openings being interconnected, the cover 101 being connected to the frame 102 and closing the third opening, and the base plate 103 being connected to the frame 102 and closing the fourth opening. The frame 102, the cover 101, and the base plate 103 together form an accommodating space. The battery cell assembly 20 and the first heat exchange plate 30 are located within this accommodating space.

[0098] The frame 102 can be made of a high-strength metal material, such as aluminum alloy or stainless steel, and its shape is rectangular or other geometrically adapted to the layout of the battery device 100. The frame 102 may have multiple positioning holes and connecting structures corresponding to the connecting portions 5013 of components such as the cover 101, the base plate 103, and the first heat exchange plate 30, enabling connection between the components. The dimensions of the cover 101 and the base plate 103 match the third and fourth openings of the frame 102, and they can be connected to the frame 102 by bolts, snap-fit ​​connections, or other methods.

[0099] The first heat exchange plate 30 is connected to the frame 102 in the housing 10 via a first connector 40. For example, the first heat exchange plate 30 is provided with a first connection hole, which passes through the first main body 301 and the first sealing member 302. The frame 102 includes a connection structure corresponding to the first connector 40. For example, the frame 102 includes a corresponding connection hole. The number of first connection holes can be one or more, which can be determined according to the size of the first heat exchange plate 30 and the connection strength requirements with the frame 102.

[0100] In some embodiments, the first heat exchange plate 30 may also be connected to the bottom plate 103 in the housing 10, that is, the first heat exchange plate 30 includes a connection hole corresponding to the first connection hole, and the first connector 40 passes through the connection hole of the first connection hole and the connection hole of the bottom plate 103 to connect the bottom plate 103 and the first heat exchange plate 30.

[0101] In this embodiment, the frame 102, cover 101, and base plate 103 cooperate with each other to provide stable support and good protection. The first connector 40 connects the first heat exchange plate 30 to the frame 102, which improves the connection strength between the first heat exchange plate 30 and the housing 10, improves the stability of the heat exchange plate position, and makes heat transfer efficient and stable. This improves the structural strength, heat dissipation efficiency, and reliability of the battery device 100, and extends the service life of the battery device 100.

[0102] Figure 5 This is a partial schematic diagram of a battery device according to an embodiment of this application. (In conjunction with...) Figure 4 and Figure 5 As shown, the battery device 100 also includes a plurality of first heat exchange plates 30 arranged along a third direction and a plurality of battery cell assemblies 20, with the first walls of two adjacent battery cells 201 abutting against the same first heat exchange plate 30; wherein, the first wall is the wall of the battery cell 201 parallel to the first direction and the third direction and close to the side of the base plate 103, and the first direction, the second direction and the third direction are perpendicular to each other.

[0103] In some embodiments, the battery device 100 may include a plurality of battery cell assemblies 20 and correspondingly configured with a plurality of first heat exchange plates 30. Specifically, the plurality of battery cell assemblies 20 are arranged along a third direction, and the plurality of battery cells 201 in each battery assembly are arranged along a first direction, that is, a plurality of battery cells 201 are also arranged along the third direction. Every two adjacent battery cells 201 abut against the same first heat exchange plate 30, which can fully utilize the heat exchange area of ​​the first heat exchange plate 30.

[0104] In this embodiment of the application, specifically, the first walls of two adjacent battery cells 201 abut against the same first heat exchange plate 30. The first wall is disposed opposite to the bottom plate 103 and is close to the bottom plate 103, that is, the first wall is the bottom wall of the battery cell 201.

[0105] It should be understood that the number of first heat exchange plates 30 can be set according to actual needs. For example, if the battery device 100 includes n battery cell assemblies 20, then the number of first heat exchange plates 30 can be n-1.

[0106] In some embodiments, the first wall may be the wall on which the battery cell 201 is provided with electrode terminals, and the first heat exchange plate 30 may be located between adjacent electrode terminals of two adjacent battery cells 201. This layout can utilize the space between the battery terminals, thereby improving the space utilization rate inside the battery device 100.

[0107] In this embodiment, by arranging multiple first heat exchange plates 30 and battery cell assemblies 20 along a third direction, the first walls of adjacent battery cells 201 are brought close together and abut against the same first heat exchange plate 30. A single first heat exchange plate 30 can simultaneously absorb heat generated by battery cells 201 on both sides, increasing the heat dissipation contact area, significantly improving heat conduction efficiency, and enhancing the heat dissipation performance of the battery device 100. The first heat exchange plates 30 provide support for the battery cells 201 and, together with the frame 102, bear the weight of the battery cell assembly 20. The multiple first heat exchange plates 30 and battery cell assemblies 20 are arranged in an alternating pattern, making full use of the internal space of the battery device 100 and improving space utilization.

[0108] Figure 6 This is another schematic diagram of the battery device according to an embodiment of this application. Figure 6 As shown, the frame 102 includes a frame portion 1023 and a first beam 1021 and a second beam 1022 arranged opposite to each other along a first direction. The first beam 1021 is located at a first opening, and the second beam 1022 is located at a second opening. The first beam 1021 and the second beam 1022 are connected to the frame portion 1023. The first heat exchange plate 30 is connected to the first beam 1021 at the first opening through a first connector 40, and the first heat exchange plate 30 is connected to the second beam 1022 at the second opening through a first connector 40.

[0109] The frame portion 1023 in this embodiment includes at least two third beams, which are arranged opposite each other in the third direction. The first beam 1021, the second beam 1022 and the two third beams are connected to each other to form a quadrilateral frame 102.

[0110] In some embodiments, the first heat exchange plate 30 is connected to the first beam 1021 and the second beam 1022 of the frame 102. Specifically, the first beam 1021 is located at the first opening, the second beam 1022 is located at the second opening, and includes a connection structure corresponding to the first connector 40, such as a connection hole, to connect the first heat exchange plate 30 to the first connector 40 at the first opening and the second opening.

[0111] Optionally, in this embodiment, the frame portion 1023 may further include a fourth beam, which is parallel to the first beam or the second beam, and the number of the fourth beam may be one or two.

[0112] In some embodiments, specifically, the frame 102 includes two fourth beams, that is, the two fourth beams are arranged opposite each other along a first direction, and the first beam 1021 and the second beam 1022 are located between the two fourth beams.

[0113] In some embodiments, specifically, the frame 102 includes a fourth beam, which together with the first beam 1021 and the third beam disposed opposite to each other along a third direction constitute a complete frame 102, and the second beam 1022 is located between the fourth beam and the first beam 1021.

[0114] In this embodiment, the first heat exchange plate 30 is connected to the first beam 1021 and the second beam 1022 at the openings at both ends, and the frame 102 provides stable support for the first heat exchange plate 30, which can effectively limit the displacement of the first heat exchange plate 30 in all directions, so that the first heat exchange plate 30 and the battery cell assembly 20 always remain in contact, thereby carrying out heat conduction.

[0115] In this embodiment, since the first beam 1021 and the second beam 1022 are located at the first opening and the second opening respectively, they can protect the heat exchange channels inside the first heat exchange plate 30, preventing deformation or damage to the heat exchange channels due to external forces, thus ensuring the normal operation of the heat exchange system. This connection method facilitates the installation and removal of the first heat exchange plate 30. During maintenance or replacement, only the first connecting piece 40 needs to be adjusted to remove the first heat exchange plate 30 from the frame 102, making the operation simple and convenient, and reducing maintenance costs and difficulties.

[0116] Combination Figure 5 and Figure 6 As shown, the battery device also includes a second heat exchange plate 50, which is located between the frame 102 and the battery cell assembly 20 adjacent to the frame 102 in the third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular to each other.

[0117] In some embodiments, the walls of the battery cell 201 adjacent to the frame 102 also need to be cooled. Therefore, a second heat exchange plate 50 is also included between the frame 102 and the battery cell assembly 20 adjacent to the frame 102.

[0118] Specifically, the battery cell 201 may include a second wall, which is parallel to the first direction and the second direction, that is, the second wall is the side wall of the battery cell 201, and the second heat exchange plate 50 is located between the second wall and the frame 102.

[0119] In some embodiments, the second heat exchange plate 50 may also be located between two adjacent battery cell assemblies 20, specifically, between the second walls of two adjacent battery cells 201 along a third direction, to dissipate heat generated between the battery cell assemblies 20.

[0120] In this embodiment, the addition of the second heat exchange plate 50, based on the first heat exchange plate 30, creates an additional heat dissipation channel for the battery device 100. The heat generated by the battery cell assembly 20 adjacent to the frame 102 can be dissipated through the second heat exchange plate 50. This multi-path heat dissipation design improves the overall heat dissipation capacity of the battery device 100, reduces the operating temperature of the battery cell assembly 20, and minimizes battery performance degradation and shortened lifespan caused by overheating.

[0121] In this embodiment, the second heat exchange plate 50 can also serve as a buffer and support structure between the frame 102 and the battery cell assembly 20. When the battery device 100 is subjected to external force, the second heat exchange plate 50 can disperse and absorb part of the impact force, preventing the frame 102 from directly colliding with the battery cell assembly 20, thereby protecting the battery cell assembly 20 from damage. The second heat exchange plate 50 can also limit the battery cell assembly 20 to a certain extent, preventing the battery cell 201 from shifting inside the device, thus enhancing the structural stability and reliability of the entire battery device 100.

[0122] Figure 7 This is a schematic diagram of the second sealing member according to an embodiment of this application. (In conjunction with...) Figures 5 to 7 As shown, the second heat exchange plate 50 includes a second main body and a second sealing member 501. The second sealing member 501 includes a sealing part 5011, an extension part 5012 and a connecting part 5013. The sealing part 5011 is located inside the second main body. The extension part 5012 is connected to the side of the sealing part 5011 away from the second main body and extends along a first direction. The connecting part 5013 is connected to the side of the extension part 5012 facing the receiving space and extends along a third direction. The battery device 100 also includes a second connector, which passes through the connecting part 5013 to connect the second heat exchange plate 50 and the frame 102.

[0123] In some embodiments, the second body portion is the same as the first body portion 301, and will not be described again here.

[0124] In some embodiments, the second sealing member 501 includes a sealing portion 5011, an extension portion 5012, and a connecting portion 5013. The sealing portion 5011 is connected to the extension portion 5012, and the extension portion 5012 is connected to the connecting portion 5013, presenting an "L" shape.

[0125] Specifically, the sealing part 5011 is located inside the second main body, that is, the sealing part 5011 is located at the first opening and the second opening of the second main body, and seals the first opening and the second opening. Its shape is adapted to the shape of the opening of the internal channel of the second main body, and can be tightly embedded in the channel opening. The sealing part 5011 can be fixedly connected to the second main body by welding, riveting or other sealing methods, and is used to seal the channel opening inside the second main body to prevent the heat exchange medium from leaking, so that the heat exchange medium flows in the heat exchange channel inside the second main body according to a predetermined path to exchange heat with the battery cell assembly 20.

[0126] The extension 5012 is connected to the side of the sealing portion 5011 away from the second main body and extends along the first direction. That is, the extension 5012 is formed by the sealing portion 5011 extending along the first direction away from the second main body and is located outside the second main body. The length of the extension 5012 is designed according to the relative position of the second heat exchange plate 50 and the frame 102 and the connection requirements, and its shape can be rectangular, circular, etc.

[0127] Due to tolerance design, the extension 5012 is spaced from the frame 102 in the third direction. To increase the connection strength between the second heat exchange plate 50 and the frame 102, a connecting portion 5013 is added and connected to the portion of the frame 102 perpendicular to the second heat exchange plate 50. The connecting portion 5013 is connected to the side of the extension 5012 facing the receiving space and extends in the third direction; that is, the connecting portion 5013 is formed by the extension 5012 extending in the third direction and facing the receiving space. The connecting portion 5013 may include a second connecting hole, through which a second connector passes. Simultaneously, the frame 102 includes a connection structure corresponding to the second connecting hole, for example, a connecting hole corresponding to the second connecting hole. The second connector passes through the second connecting hole and the connecting hole of the frame 102 to connect the second heat exchange plate 50 and the frame 102.

[0128] In this embodiment, the extension 5012 and the connecting portion 5013 of the second sealing member 501 are designed to form a stable connection structure between the second heat exchange plate 50 and the frame 102. The connecting portion 5013 is connected to the frame 102 through the second connector, and can withstand the external forces such as vibration and impact that the battery device 100 is subjected to during operation, reducing the possibility of displacement or loosening of the second heat exchange plate 50, and improving the stability and reliability of the battery device 100 structure.

[0129] Figure 8 This is another structural diagram of the first heat exchange plate according to an embodiment of this application. Figure 8As shown, the frame 102 includes a beam and a support. The support is connected to the side of the beam facing the receiving space and extends in a third direction. The height of the support in the second direction is lower than that of the beam. The second heat exchange plate 50 is passed through the connection part 5013 via a second connector and is connected to the support of the frame 102.

[0130] In some embodiments, frame 102 may include a third beam and / or a fourth beam, the third beam and the fourth beam may include interconnected beam bodies and supports.

[0131] The support is connected to the side of the beam facing the receiving space and extends along a third direction. That is, the support of frame 102 can be formed by the beam extending along a third direction towards the receiving space, and its material can be the same as the beam, using a high-strength metal material. The shape and size of the support are designed according to the installation requirements of the second heat exchange plate 50.

[0132] The height of the support part along the second direction is lower than that of the beam, that is, the support part and the beam form a step shape. The second heat exchange plate 50 abuts against the support part and is connected to the support part through the second connector.

[0133] In this embodiment of the application, a connecting hole is provided on the support portion corresponding to the position of the connecting portion 5013 of the second heat exchange plate 50, for inserting the second connecting member to achieve connection and fixation with the second heat exchange plate 50.

[0134] In some embodiments, the frame 102 may further include a beam and a support disposed opposite to each other along a first direction, the support being used to connect the first heat exchange plate 30.

[0135] In some embodiments, optionally, due to the high strength of the frame 102, the support portion disposed opposite to the first direction and the third direction can also be used to support the battery cell assembly 20, thereby enhancing the structural strength of the battery device 100.

[0136] In this embodiment, the support portion of the frame 102 is designed to provide a connection structure for the second heat exchange plate 50, capable of withstanding the forces generated by the second heat exchange plate 50 and the battery cell assembly 20 during operation. The second heat exchange plate 50 is connected to the support portion via a second connector, reducing the possibility of displacement or loosening of the second heat exchange plate 50 when the battery device 100 is subjected to external forces such as vibration or impact, and enhancing the connection strength between the second heat exchange plate 50 and the frame 102. The tight connection between the second heat exchange plate 50 and the support portion of the frame 102 ensures good contact between the second heat exchange plate 50 and the battery cell assembly 20, allowing heat to be quickly transferred from the battery cell assembly 20 to the second heat exchange plate 50, thereby enhancing the heat dissipation capacity of the battery device 100.

[0137] Continue to refer to Figure 8The first heat exchange plate also includes a first partition 3011 extending along a first direction. The first partition 3011 is disposed inside the first main body 301. The first partition 3011 is sealed to the first sealing member 302 located at the first opening and is spaced apart from the first sealing member 302 located at the second opening, so as to divide the heat exchange channel into an inlet channel and an outlet channel that are interconnected.

[0138] In some embodiments, one end of the first partition 3011 is seamlessly sealed to the first sealing member 302 located at the first opening by welding or sealant, forming a physical barrier; the other end is spaced apart from the first sealing member 302 located at the second opening, thereby dividing a single heat exchange channel into an inlet channel and an outlet channel, which are connected by the gap between the first partition 3011 and the first sealing member 302 at the second opening.

[0139] In some embodiments, in the thickness direction of the first heat exchange plate 30, the first partition 3011 may be connected to the inner wall of the first main body 301, or a certain distance may be left between them; this application does not limit this.

[0140] When heat exchange is performed using the first heat exchange plate 30, the heat exchange medium flows in from the inlet channel. Since one end of the first partition 3011 is sealed to the first sealing member 302 located at the first opening, the heat exchange medium flows from the first opening to the second opening in the inlet channel. It then enters the outlet channel through the gap between the first partition 3011 and the first sealing member 302 at the second opening, and then flows from the second opening to the first opening, completing the entire heat exchange cycle.

[0141] The heat exchange medium absorbs heat from the battery cell assembly 20 that is in contact with the first heat exchange plate 30 by flowing in the heat exchange channel. Due to the arrangement of the inlet and outlet channels, the heat exchange medium can pass through all the battery cells 201 in the battery cell assembly 20 to cool each battery cell 201.

[0142] In some embodiments, the internal structure of the second main body of the second heat exchange plate 50 is the same as that of the first heat exchange plate 30, that is, the second heat exchange plate 50 also includes a first partition 3011 extending along a first direction. The first partition 3011 is sealed to a second sealing member 501 located at the first opening and spaced apart from the second sealing member 501 located at the second opening, thereby dividing the heat exchange channels in the second main body into interconnected liquid inlet channels and liquid outlet channels.

[0143] In this embodiment, the first partition 3011 divides the heat exchange channel into an inlet channel and an outlet channel, creating a unidirectional and orderly flow path for the heat exchange medium within the heat exchange plate. This facilitates the distribution of the heat exchange medium within the first heat exchange plate 30. It also allows the heat exchange medium to diffuse evenly to all areas in the inlet channel, ensuring sufficient contact with the battery cell assembly 20, preventing insufficient local heat dissipation or overcooling, and improving the uniformity of the battery pack's temperature field.

[0144] In this embodiment, the first partition 3011 not only serves as a flow channel divider, but also acts as a support structure inside the first heat exchange plate 30, enhancing the structural strength of the first heat exchange plate 30 and reducing the possibility of deformation of the first heat exchange plate 30 when the battery device 100 is subjected to stress caused by vibration, impact or temperature change.

[0145] Continue to refer to Figure 8 The first heat exchange plate also includes a plurality of second partitions 3012 arranged along a third direction. The second partitions 3012 are disposed inside the first main body 301 and extend along the first direction. The second partitions 3012 are spaced apart from the first sealing members 302 at the first opening and the second opening, respectively, so as to divide the liquid inlet channel and / or liquid outlet channel into a plurality of channels. The third direction is perpendicular to the first direction and perpendicular to the thickness direction of the first heat exchange plate 30.

[0146] In some embodiments, the two ends of the second partition 3012 are spaced apart from the first sealing member 302 at the first opening and the second opening, respectively, further dividing the liquid inlet channel and / or liquid outlet channel into multiple sub-channels. That is, the second partition 3012 can be located in the liquid inlet channel to divide the liquid inlet channel into multiple channels, and the second partition 3012 can also be located in the liquid outlet channel to divide the liquid outlet channel into multiple channels.

[0147] In some embodiments, the number of second partitions 3012 is set according to the size of the first heat exchange plate 30 and the heat dissipation requirements of the battery cell assembly 20, etc., and this application does not limit it.

[0148] In some embodiments, the second partition 3012 may be arranged at equal intervals along a third direction, and the second partition 3012 may be parallel to the first partition 3011 and symmetrically arranged about the first partition 3011.

[0149] When the battery device 100 is running, the heat exchange medium flows in from the inlet channel and flows dispersedly through multiple inlet sub-channels formed by multiple second partitions 3012. The heat exchange medium in each sub-channel uniformly covers the surface of the battery cell assembly 20, and then the heat exchange medium enters the outlet channel through intervals, converges at the outlet channel at the second opening, and is also guided to flow through the first opening through multiple outlet sub-channels.

[0150] In some embodiments, in the thickness direction of the first heat exchange plate 30, the second partition 3012 is similar to the first partition 3011. The second partition 3012 can be connected to the inner wall of the first main body 301, or it can be left at a certain distance. This application does not limit this.

[0151] In some embodiments, the internal structure of the second main body of the second heat exchange plate 50 is the same as that of the first heat exchange plate 30, that is, the second heat exchange plate 50 also includes a plurality of second partitions 3012 arranged along a third direction. The second partitions 3012 are disposed inside the second main body and extend along a first direction. The second partitions 3012 are spaced apart from the second sealing members 501 at the first opening and the second opening, respectively, so as to divide the liquid inlet channel and / or liquid outlet channel into a plurality of channels.

[0152] In this embodiment, multiple second partitions 3012 divide the inlet and / or outlet channels into multiple sub-channels, so that the heat exchange medium is evenly distributed within the first heat exchange plate 30. This avoids insufficient local heat dissipation caused by uneven flow in a single channel. Through the dispersed and converged flow paths, each region of the battery cell assembly 20 is in full contact with the heat exchange medium, thereby improving the uniformity of the battery pack temperature field and enhancing the consistency of battery performance.

[0153] In this embodiment, multiple second separators 3012 serve as internal support structures for the first main body 301, enhancing the overall rigidity of the first heat exchange plate 30. When the battery device 100 is subjected to vibration, impact, or temperature changes, the second separators 3012 can reduce the deformation of the first main body 301, lowering the possibility of flow channel damage or seal failure.

[0154] Figure 9 This is an internal structural diagram of the first heat exchange plate according to an embodiment of this application. Figure 10 This is another internal structural diagram of the first heat exchange plate in an embodiment of this application. Figure 9 and Figure 10 As shown, the first partition 3011 and the second partition 3012 are made of thermally conductive materials and are sealed to the first main body 301 in the second direction; wherein, the first partition 3011 and the second partition 3012 are inclined relative to the second direction; and / or the surfaces of the first partition 3011, the second partition 3012 and the inner wall of the first main body 301 include heat dissipation portions, which protrude toward the interior of the first main body 301; the first direction, the second direction and the third direction are perpendicular to each other.

[0155] In some embodiments, both the first partition 3011 and the second partition 3012 may be made of a material with high thermal conductivity, such as copper, aluminum or their alloys, so that they have thermal conductivity while separating the flow channels.

[0156] In the second direction, namely the thickness direction of the base plate 103, the first partition 3011 and the second partition 3012 can be sealed to the first main body 301 by means of welding, brazing, or adhesive bonding. For example, laser welding or argon arc welding can be used to ensure high sealing performance and strength at the connection 5013, preventing the heat exchange medium from leaking from the connection between the first partition 3011, the second partition 3012 and the first main body 301, thereby maintaining the integrity and reliability of the heat exchange channel.

[0157] In some embodiments, the first separator 3011 and the second separator 3012 are optionally inclined relative to the second direction. That is, the first separator 3011 is installed at a specific angle inside the first main body 301, and the inclination angle is determined according to the heating characteristics of the battery cell assembly 20 and the flow characteristics of the heat exchanger, and can be between 5° and 30°.

[0158] The second separator 3012 is similar to the first separator 3011 and can also be tilted at a certain angle relative to the second direction. The tilt angle of the second separator 3012 can be the same or different. The tilt angle can be determined according to factors such as the heat generation characteristics of the battery cell assembly 20 and the heat dissipation requirements of different areas, and can be between 5° and 30°.

[0159] In this embodiment, the inclined arrangement of the first partition 3011 and the second partition 3012 increases the contact area between the heat exchange medium and the first main body 301, thereby increasing the contact area between the first heat exchange plate 30 and the battery cell assembly 20 and enhancing the heat exchange effect.

[0160] In some embodiments, optionally, heat dissipation portions are provided on the surfaces of the first partition 3011, the second partition 3012, and the inner wall of the first main body 301. The heat dissipation portions have a raised structure, and their shapes include columnar, conical, prismatic, etc., protruding towards the interior of the first main body 301. For example, heat dissipation fins can be used.

[0161] The size, shape, and distribution density of the heat dissipation section are determined based on factors such as the flow rate and temperature distribution within the flow channel, the heat generation characteristics of the battery cell assembly 20, and the heat dissipation requirements of different areas.

[0162] In this embodiment, the arrangement of the heat dissipation section increases the contact area between the first partition 3011, the second partition 3012, and the inner wall of the first main body 301 and the heat exchange medium, thereby further improving the heat dissipation efficiency.

[0163] In some embodiments, the first partition 3011 and the second partition 3012 may be inclined, or they may be provided together with the inner wall surface of the first main body 301 for heat dissipation, or they may be inclined and combined with the heat dissipation structure.

[0164] In some embodiments, the structure of the first partition 3011 and the second partition 3012 inside the second main body of the second heat exchange plate 50 can be the same as that of the first heat exchange plate 30, that is, the material of the first partition 3011 and the second partition 3012 in the second heat exchange plate 50 is a thermally conductive material, and they are sealed to the second main body in the second direction; wherein the first partition 3011 and the second partition 3012 are inclined relative to the second direction; and / or the surfaces of the first partition 3011, the second partition 3012 and the inner wall of the first main body 301 include heat dissipation portions, which protrude toward the interior of the first main body 301.

[0165] In this embodiment, the inclined arrangement of the first partition 3011 and the second partition 3012, their shared heat dissipation structure with the inner wall surface of the first main body 301, or a combination of both, can increase the contact area between the heat exchange medium and the first main body 301, improve the heat dissipation efficiency of the first heat exchange plate 30, reduce the operating temperature of the battery cell assembly 20, and ensure stable battery performance. The sealed connection between the first partition 3011 and the second partition 3012 and the first main body 301 enhances the overall structural strength of the first heat exchange plate 30 and strengthens the battery device 100's ability to withstand external forces such as vibration and impact during operation.

[0166] Figure 11 This is a partial top view of the first heat exchange plate according to an embodiment of this application. Figure 11 As shown, the first heat exchange plate 30 also includes a liquid inlet 303 and a liquid outlet 304 located at the second opening. The liquid inlet 303 is connected to the liquid inlet channel, and the liquid outlet 304 is connected to the liquid outlet channel. The liquid inlet 303 and the liquid outlet 304 are spaced apart from each other along the first direction and spaced apart from each other along the third direction. The third direction is perpendicular to the first direction and perpendicular to the thickness direction of the first heat exchange plate 30.

[0167] In some embodiments, the first heat exchange plate 30 is provided with an inlet 303 and an outlet 304 at the second opening. The inlet 303 and the outlet 304 can be made of high-strength metal materials and are connected to the main body of the first heat exchange plate 30 by welding, threaded connection or other means.

[0168] The inlet 303 and outlet 304 are spaced apart from each other along a first direction and also spaced apart from each other along a third direction. In the first direction, they are located at opposite ends of the second opening, i.e., the inlet 303 and outlet 304 are diagonally arranged. The spaced-apart arrangement along the first direction allows the inlet 303 and outlet 304 to connect to the inlet and outlet channels respectively. In the third direction, the inlet 303 and outlet 304 are staggered, allowing the pipes transporting heat exchanger to the inlet 303 and outlet 304 to be arranged in parallel without intersecting, occupying space in the vertical direction (the second direction), and potentially at the same height.

[0169] In some embodiments, a connection structure, such as an internal threaded interface or a quick-connect interface, can be provided at the ports of the inlet 303 and the outlet 304 to facilitate connection with the heat exchanger pipeline. The inner wall of the interface can be smoothed to reduce fluid flow resistance, and a sealing ring or gasket can be provided at the interface to improve the sealing performance after connection and prevent heat exchanger leakage.

[0170] When the battery device 100 is operating for heat exchange, the low-temperature heat exchanger is driven by an external circulation pump to flow into the inlet channel from the inlet 303. It then flows along multiple sub-channels formed by the second partition 3012, fully absorbing the heat transferred from the battery cell assembly 20 to the first heat exchange plate 30. After absorbing heat, the heat exchanger enters the outlet channel, flowing along multiple sub-channels within the outlet channel, continuing to absorb heat transferred from the battery cell assembly 20 to the first heat exchange plate 30. The high-temperature heat exchanger, after absorbing heat, converges at the outlet 304 and is finally discharged from the first heat exchange plate 30, entering the external cooling system for cooling, thus completing the heat exchanger's circulating heat dissipation process.

[0171] In some embodiments, the second heat exchange plate 50 may be the same as the first heat exchange plate 30, and also includes an inlet 303 and an outlet 304 located at the second opening. The inlet 303 is connected to the inlet flow channel, and the outlet 304 is connected to the outlet flow channel. The inlet 303 and the outlet 304 are spaced apart from each other along a first direction and spaced apart from each other along a third direction.

[0172] In this embodiment, the inlet 303 and outlet 304 are spaced apart from each other along a first direction, allowing the inlet 303 and outlet 304 to be connected to the inlet flow channel and outlet flow channel respectively, thus enabling the heat exchanger to form an orderly flow path inside the heat exchange plate. The inlet 303 and outlet 304 are also spaced apart from each other along a third direction, allowing the pipes transporting the heat exchanger to the inlet 303 and outlet 304 to be arranged in parallel. This avoids space waste and cluttered layout caused by staggered pipe arrangements, and prevents the pipes from occupying space in the second direction, thereby improving the space utilization of the battery device 100.

[0173] Figure 12 This is another schematic diagram of the battery device according to an embodiment of this application. Figure 12 As shown, the battery device 100 also includes an inlet pipe 305 and an outlet pipe 306. The inlet pipe 305 is connected to the inlet port 303; the outlet pipe 306 is connected to the outlet port 304; wherein the projection of the inlet pipe 305 and / or the outlet pipe 306 toward the second direction is at least partially coincident with the first connector 40.

[0174] In some embodiments, the inlet pipe 305 and the outlet pipe 306 can be made of flexible or rigid pipes. Flexible pipes can be made of heat-resistant and pressure-resistant rubber pipes or fluoroplastic pipes, while rigid pipes can be made of aluminum alloy or stainless steel pipes.

[0175] The inner diameters of the inlet pipe 305 and the outlet pipe 306 in this embodiment are designed according to the heat exchanger flow requirements, so that the heat exchanger can flow smoothly and the pipe wall thickness meets the pressure bearing requirements.

[0176] In this embodiment of the application, one end of the liquid inlet pipe 305 is connected to the liquid inlet 303 of the first heat exchange plate 30 by means of threaded connection, snap connection or quick connector, and the other end is connected to the liquid supply end of the external heat exchange system; one end of the liquid outlet pipe 306 is connected to the liquid outlet 304 of the first heat exchange plate 30, and the other end is connected to the liquid return end of the external heat exchange system.

[0177] In some embodiments, the inlet pipe 305 is sequentially connected to the inlet port 303 of the second heat exchange plate 50, the inlet ports 303 of a plurality of first heat exchange plates 50, and the inlet port 303 of the second heat exchange plate 50 at the other end. A three-way valve is installed at the inlet port 303 of the second heat exchange plate 50. The first end of the three-way valve is connected to the liquid supply end of the external heat exchange system, the second end is connected to the inlet port 303 of the second heat exchange plate 50, and the third end is connected to the inlet port 303 of the first heat exchange plate 300. The outlet pipe 306 is similar to the inlet pipe 305. A three-way valve is installed at the outlet port 304 of the second heat exchange plate 50 at the other end. The first end of the three-way valve is connected to the liquid return end of the external heat exchange system, the second end is connected to the outlet port 304 of the second heat exchange plate 50, and the third end is connected to the outlet port 304 of the first heat exchange plate 50.

[0178] In this embodiment of the application, in order to make full use of the space at the second opening of the first heat exchange plate 30, the liquid inlet pipe 305 and / or the liquid outlet pipe 306 can be located above the first sealing member 302, that is, the projection of the liquid inlet pipe 305 and / or the liquid outlet pipe 306 toward the second direction at least partially coincides with the first connecting member 40. In other words, the projection of the liquid inlet pipe 305 and / or the liquid outlet pipe 306 toward the second direction at least partially falls on the first sealing member 302.

[0179] Specifically, the inlet pipe 305 is located on the side of the outlet pipe 306 facing the outside of the receiving space, and its projected portion in the second direction covers the first connector 40. Alternatively, the outlet pipe 306 is located on the side of the inlet pipe 305 facing the outside of the receiving space, and its projected portion in the second direction covers the first connector 40. Or, both the inlet pipe 305 and the outlet pipe 306 are simultaneously adjusted in their layout in the second direction, with their projections overlapping the first connector 40. Through the coordinated design of the two pipes, space utilization is further improved.

[0180] In this embodiment, the design of the liquid inlet pipe 305 and / or liquid outlet pipe 306 overlapping with the projection of the first connector 40 makes full use of the space above the first connector 40, avoids the waste of space caused by the arbitrary arrangement of pipes inside the battery device 100, makes the internal structure of the battery device 100 more compact, and reserves space for the installation of other components or the arrangement of larger capacity battery cells 201 without increasing the external size of the device.

[0181] In this embodiment, the first sealing member 302 and the first main body 301 are connected by welding.

[0182] In some embodiments, the first sealing member 302 enters from the first opening and the second opening of the first body portion 301, the first sealing member 302 is completely located inside the first body portion 301, and the first sealing member 302 can be flush with the first body portion 301 at the first opening.

[0183] The first sealing element 302 is welded to the first main body 301, forming a flat and smooth welded surface at the first opening and the second opening. The welding process employs welding techniques such as laser welding and argon arc welding. Under high temperature, the materials at the welded surfaces of the first sealing element 302 and the first main body 301 fuse together to form a strong weld, improving the sealing performance and structural strength of the welded area.

[0184] In this embodiment, the first sealing element 302 and the first heat exchange plate 30 are integrated through welding. Welding eliminates gaps between the sealing element and the heat exchange plate, improves the sealing performance of the first heat exchange plate 30 at the first and second openings, prevents leakage of the heat exchange medium, and allows the heat exchange medium in the heat exchange channel to flow according to the channel arrangement, ensuring the smooth operation of the heat dissipation system. Welding also firmly bonds the first sealing element 302 to the first main body 301, enhancing the overall structural strength and stability of the first heat exchange plate 30.

[0185] This application embodiment also provides an electrical device, which includes a battery device 100 for providing electrical energy. The battery device 100 may include a housing 10, a battery cell assembly 20, a first heat exchange plate 30, and a first connector 40. The housing 10 forms a receiving space. The battery cell assembly 20 includes a plurality of battery cells 201 arranged along a first direction and received in the receiving space. The first heat exchange plate 30 is received in the receiving space and includes a first main body 301 and a first sealing member 302. The first main body 301 extends along the first direction and abuts against the battery cell assembly 20. The first main body 301 has a first opening and a second opening. The first opening and the second opening are arranged opposite to each other along the first direction and are interconnected. The first sealing member 302 is disposed inside the first opening and the second opening respectively. The first sealing member 302 is used to seal the first opening and the second opening to form a heat exchange channel inside the first main body 301. The first connector 40 passes through the first main body 301 and the first sealing member 302 to connect the first heat exchange plate 30 and the housing 10.

[0186] It should be understood that the battery device 100 may also include the battery device 100 in any of the above embodiments.

[0187] According to some embodiments of this application, see Figures 2 to 12 This application provides a battery device 100, which includes a housing 10, a battery cell assembly 20, a first heat exchange plate 30, and a first connector 40. The housing 10 forms a receiving space; the battery cell assembly 20 includes a plurality of battery cells 201 arranged along a first direction and received in the receiving space; the first heat exchange plate 30 is received in the receiving space and includes a first main body 301 and a first sealing member 302. The first main body 301 extends along the first direction and abuts against the battery cell assembly 20. The main body 301 has a first opening and a second opening, which are arranged opposite to each other along a first direction and are interconnected. A first sealing member 302 is disposed inside the first opening and the second opening respectively. The first sealing member 302 is used to seal the first opening and the second opening to form a heat exchange channel inside the first main body 301. A first connecting member 40 passes through the first main body 301 and the first sealing member 302 to connect the first heat exchange plate 30 and the housing 10. The first sealing member 302 and the first main body 301 are connected by welding.

[0188] The housing 10 includes a frame 102, a cover 101, and a bottom plate 103. The cover 101 and the bottom plate 103 are respectively connected to both sides of the frame 102 along the second direction. The bottom plate 103, the frame 102, and the cover 101 together form an accommodating space. The first heat exchange plate 30 is connected to the frame 102 through a first connector 40. The second direction is the thickness direction of the bottom plate 103 and is perpendicular to the first direction.

[0189] The battery device 100 also includes a plurality of first heat exchange plates 30 and a plurality of battery cell assemblies 20 arranged along a third direction. The first walls of two adjacent battery cells 201 abut against the same first heat exchange plate 30. The first wall is the wall of the battery cell 201 that is parallel to the first direction and the third direction and is close to the bottom plate 103. The first direction, the second direction, and the third direction are perpendicular to each other. The frame 102 includes a frame portion 1023 and a first beam 1021 and a second beam 1022 arranged opposite to each other along the first direction. The first beam 1021 is located at a first opening, and the second beam 1022 is located at a second opening. The first beam 1021 and the second beam 1022 are connected to the frame portion 1023. The first heat exchange plate 30 is connected to the first beam 1021 at the first opening through a first connector 40, and the first heat exchange plate 30 is connected to the second beam 1022 at the second opening through a first connector 40.

[0190] The battery device 100 also includes a second heat exchange plate 50, which is located between the frame 102 and the battery cell assembly 20 adjacent to the frame 102 in a third direction, wherein the first direction, the second direction, and the third direction are mutually perpendicular. The second heat exchange plate 50 includes a second main body and a second sealing member 501. The second sealing member 501 includes a sealing portion 5011, an extension portion 5012, and a connecting portion 5013. The sealing portion 5011 is located inside the second main body. The extension portion 5012 is connected to the side of the sealing portion 5011 away from the second main body and extends along the first direction. The connecting portion 5013 is connected to the side of the extension portion 5012 facing the receiving space and extends along the third direction. The battery device 100 also includes a second connector, which passes through the connecting portion 5013 to connect the second heat exchange plate 50 and the frame 102. The frame 102 includes a beam and a support. The support is connected to the side of the beam facing the receiving space and extends in a third direction. The height of the support in the second direction is lower than that of the beam. The second heat exchange plate 50 is passed through the connection part 5013 via a second connector and is connected to the support of the frame 102.

[0191] 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 by, include: The box (10) has a receiving space; A battery cell assembly (20) comprising a plurality of battery cells (201) arranged along a first direction and housed in the housing space; A first heat exchange plate (30) is housed in the accommodating space. The first heat exchange plate (30) includes a first main body (301) and a first sealing member (302). The first main body (301) extends along the first direction and abuts against the battery cell assembly (20). The first main body (301) has a first opening and a second opening. The first opening and the second opening are arranged opposite to each other along the first direction and are interconnected. The first sealing member (302) is respectively disposed inside the first opening and the second opening. The first sealing member (302) is used to seal the first opening and the second opening to form a heat exchange channel inside the first main body (301). A first connector (40) passes through the first main body (301) and the first sealing member (302) to connect the first heat exchange plate (30) and the housing (10).

2. The battery device according to claim 1, characterized by The housing (10) includes a frame (102), a cover (101), and a bottom plate (103). The cover (101) and the bottom plate (103) are respectively connected to both sides of the frame (102) along the second direction. The bottom plate (103), the frame (102), and the cover (101) together form the accommodating space. The first heat exchange plate (30) is connected to the frame (102) through the first connector (40). The second direction is the thickness direction of the bottom plate (103) and is perpendicular to the first direction.

3. The battery device of claim 2, wherein, The battery device also includes a plurality of first heat exchange plates (30) arranged along a third direction and a plurality of battery cell assemblies (20), wherein the first walls of two adjacent battery cells (201) abut against the same first heat exchange plate (30). Wherein, the first wall is the wall of the battery cell (201) that is parallel to the first direction and the third direction and is close to the bottom plate (103), and the first direction, the second direction and the third direction are perpendicular to each other.

4. The battery device of claim 3, wherein The frame (102) includes a frame portion (1023) and a first beam (1021) and a second beam (1022) arranged opposite to each other along the first direction. The first beam (1021) is located at the first opening, and the second beam (1022) is located at the second opening. The first beam (1021) and the second beam (1022) are connected to the frame portion (1023). The first heat exchange plate (30) is connected to the first beam (1021) at the first opening through the first connector (40), and the first heat exchange plate (30) is connected to the second beam (1022) at the second opening through the first connector (40).

5. The battery device of claim 2, wherein The battery device further includes a second heat exchange plate (50), which is located between the frame (102) and the battery cell assembly (20) adjacent to the frame (102) in a third direction, wherein the first direction, the second direction and the third direction are mutually perpendicular.

6. The battery device of claim 5, wherein The second heat exchange plate (50) includes a second main body and a second sealing member (501). The second sealing member (501) includes a sealing part (5011), an extension part (5012), and a connecting part (5013). The sealing part (5011) is located inside the second main body. The extension part (5012) is connected to the side of the sealing part (5011) away from the second main body and extends along the first direction. The connecting part (5013) is connected to the side of the extension part (5012) facing the receiving space and extends along the third direction. The battery device further includes a second connector, which passes through the connecting portion (5013) to connect the second heat exchange plate (50) and the frame (102).

7. The battery device of claim 6, wherein The frame (102) includes a beam and a support, the support being connected to the side of the beam facing the receiving space and extending along the third direction, the height of the support along the second direction being lower than that of the beam; The second heat exchange plate (50) is inserted through the second connector into the connecting part (5013) and connected to the supporting part of the frame (102).

8. The battery device according to any one of claims 1 to 7, characterized by, The first heat exchange plate (30) further includes a first partition (3011) extending along the first direction. The first partition (3011) is disposed inside the first main body (301). The first partition (3011) is sealed to the first sealing member (302) located at the first opening and spaced apart from the first sealing member (302) located at the second opening, so as to divide the heat exchange channel into an inlet channel and an outlet channel that are interconnected.

9. The battery device of claim 8, wherein, The first heat exchange plate (30) further includes a plurality of second partitions (3012) arranged along a third direction. The second partitions (3012) are disposed inside the first main body (301) and extend along the first direction. The second partitions (3012) are spaced apart from the first sealing member (302) at the first opening and the second opening, respectively, so as to divide the liquid inlet channel and / or the liquid outlet channel into a plurality of channels. The third direction is perpendicular to the first direction and also perpendicular to the thickness direction of the first heat exchange plate (30).

10. The battery device of claim 9, wherein, The first partition (3011) and the second partition (3012) are made of thermally conductive materials and are sealed to the first main body (301) in the second direction; Wherein, the first partition (3011) and the second partition (3012) are inclined relative to the second direction; and / or The surfaces of the first partition (3011), the second partition (3012), and the inner wall of the first main body (301) include heat dissipation portions, which protrude toward the interior of the first main body (301); The first direction, the second direction, and the third direction are all perpendicular to each other.

11. The battery device of claim 8, wherein, The first heat exchange plate (30) further includes a liquid inlet (303) and a liquid outlet (304) located at the second opening. The liquid inlet (303) is connected to the liquid inlet channel, and the liquid outlet (304) is connected to the liquid outlet channel. The liquid inlet (303) and the liquid outlet (304) are spaced apart from each other along the first direction and spaced apart from each other along a third direction, wherein the third direction is perpendicular to the first direction and perpendicular to the thickness direction of the first heat exchange plate (30).

12. The battery device according to claim 11, characterized in that, The battery device also includes: Liquid inlet pipe (305), the liquid inlet pipe (305) is connected to the liquid inlet (303); A liquid outlet pipe (306) is connected to the liquid outlet (304); The projection of the inlet pipe (305) and / or the outlet pipe (306) toward the second direction is at least partially coincident with the first connector (40).

13. The battery device according to any one of claims 1 to 7, characterized in that, The first sealing element (302) is connected to the first main body (301) by welding.

14. An electrical device, characterized by The battery device includes any one of claims 1 to 13, the battery device being used to provide electrical energy.

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