Battery devices and electrical equipment

Abstract

This application relates to a battery device and an electrical appliance. The battery device includes a battery cell and a heat exchange mechanism. The heat exchange mechanism includes a heat exchange element and a current collector. The heat exchange element is thermally connected to the battery cell on at least one side along a first direction. The current collector is disposed at at least one end of the heat exchange element along a second direction. The heat exchange element includes a non-metallic shell and a metal reinforcing member located inside the non-metallic shell. The non-metallic shell encloses a heat exchange cavity, which is in communication with the current collector. The non-metallic shell is thermally connected to the battery cell. The metal reinforcing member is connected to at least one of two opposing inner wall surfaces of the non-metallic shell in the first direction, where the first direction intersects the second direction. This application can improve the reliability of the battery device.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to battery devices and electrical equipment. Background Technology

[0002] Batteries are widely used in electronic devices such as mobile phones, laptops, electric vehicles, electric cars, electric airplanes, electric ships, electric toy cars, electric toy ships, electric toy airplanes, and power tools, etc.

[0003] Battery devices generate a lot of heat during use. They are usually equipped with heat exchange mechanisms to dissipate heat and cool down. However, the reliability of existing heat exchange mechanisms is low, which affects the performance of the battery device. Summary of the Invention

[0004] In view of the above problems, this application provides a battery device and an electrical appliance, which aims to improve the performance of the battery device.

[0005] In a first aspect, this application proposes a battery device, including a battery cell and a heat exchange mechanism; the heat exchange mechanism includes a heat exchange element and a current collector, the heat exchange element is thermally connected to the battery cell on at least one side along a first direction, the current collector is disposed at at least one end of the heat exchange element along a second direction, the heat exchange element includes a non-metallic shell and a metal reinforcing member located inside the non-metallic shell, the non-metallic shell encloses to form a heat exchange cavity, the heat exchange cavity is in communication with the current collector, the non-metallic shell is thermally connected to the battery cell, and the metal reinforcing member is connected to at least one of two opposing inner wall surfaces of the non-metallic shell in the first direction, the first direction intersecting the second direction.

[0006] In the embodiments of this application, a structural design combining a non-metallic outer shell and internal metal reinforcements improves upon the problems of poor vibration resistance, thermal stress warping, and electrochemical corrosion inherent in traditional aluminum alloy extruded cold plates. The non-metallic outer shell reduces the overall weight of the heat exchange component, has stronger resistance to expansion and deformation, and superior corrosion resistance. The metal reinforcements effectively support the non-metallic outer shell, reducing the risk of deformation and damage. The overall non-rigid structure provides better vibration resistance during vehicle operation, reduces vibration damage to the sealing interface, improves sealing performance, and enhances the long-term reliability of the heat exchange mechanism and the performance of the battery device.

[0007] In some embodiments, the metal reinforcement includes a reinforcement portion disposed along a second direction, the reinforcement portion being connected to the non-metallic housing, and the reinforcement portion being located on the side of the non-metallic housing facing the heat exchange chamber.

[0008] In these embodiments, by providing a reinforcing section inside the non-metallic outer shell, the structural rigidity and deformation resistance of the heat exchanger are effectively improved.

[0009] In some embodiments, a first protrusion is formed on the side of the non-metallic shell facing the reinforcing portion, and a first groove is formed on the side of the reinforcing portion facing the non-metallic shell, with the first protrusion embedded in the first groove; or, a second groove is formed on the side of the non-metallic shell facing the reinforcing portion, with at least a portion of the reinforcing portion embedded in the second groove.

[0010] In these embodiments, the combination of protrusions and grooves effectively limits the relative displacement between the reinforcing part and the non-metallic shell, increases the contact area between the non-metallic shell and the reinforcing part, and enhances the connection strength between the two.

[0011] In some embodiments, the metal reinforcement includes a metal barrier portion connected between two opposing inner wall surfaces of the non-metallic housing in a first direction, so as to divide the heat exchange cavity into multiple heat exchange channels through the metal barrier portion.

[0012] In these embodiments, the metal barrier can effectively support the two sides of the non-metallic shell in the thickness direction, reducing the risk of deformation and damage, so that the heat exchange mechanism has good seismic performance and a certain structural strength.

[0013] In some embodiments, the inner wall surface of the non-metallic casing is provided with two opposing recesses, one end of the metal barrier in the first direction is embedded in one recess, and the other end of the metal barrier in the first direction is embedded in the other recess.

[0014] In these embodiments, a reliable connection between the metal and non-metal materials is achieved by embedding the two ends of the metal barrier into the recesses of the non-metallic shell. The metal barrier not only separates the heat exchange channels but also effectively improves the thermal conductivity of the overall structure.

[0015] In some embodiments, at least a portion of the blocking portion is inclined relative to the first direction; the recess includes opposing first side and second side, the protrusion length of the first side toward the heat exchange channel is greater than the protrusion length of the second side toward the heat exchange channel; wherein, the first side of the two opposing recesses is arranged close to each other, and the second side of the two opposing recesses is arranged far apart from each other.

[0016] In these embodiments, this arrangement allows the longer protruding first side to better support and fix the inclined barrier portion, thereby improving the stability of the barrier portion.

[0017] In some embodiments, the non-metallic shell is a one-piece injection molded part.

[0018] In these embodiments, the injection molding process grants the structure greater design freedom, allowing for flexible adjustments to the layout of the barrier components to meet the heat dissipation needs of different areas, while reducing subsequent machining processes and lowering manufacturing costs. The integrated molding process improves upon the assembly stress and sealing issues inherent in traditional split structures, offering better vibration resistance, sealing reliability, and lightweight advantages.

[0019] In some embodiments, the heat exchanger further includes a plurality of non-metallic barrier portions connected between two opposing inner wall surfaces of the non-metallic housing in a first direction, and at least a portion of the metallic barrier portions are located between two adjacent non-metallic barrier portions.

[0020] In these embodiments, the non-metallic outer shell and the barrier portions at both ends can be made of a non-metallic material with good toughness, while the barrier portion and the reinforcing portion in the middle can be made of a metallic material, providing good support and thus specifically improving the resistance to thermal expansion deformation of the wide harmonica tube.

[0021] In some embodiments, the metal barrier portion and the non-metallic shell enclose at least two heat exchange channels; and / or, the metal barrier portion abuts against an adjacent non-metallic barrier portion at one end in a third direction, with the first direction, the second direction and the third direction intersecting each other.

[0022] In these embodiments, the overall weight is reduced while maintaining structural strength through a combination of metallic and non-metallic materials. The rigid support structure formed by the metallic barrier effectively suppresses the deformation of the non-metallic shell under fluid pressure.

[0023] In some embodiments, the metal reinforcement includes a plurality of metal barrier portions; wherein the plurality of metal barrier portions are arranged sequentially at intervals along a third direction; or, the plurality of metal barrier portions are sequentially connected to form an integral structure.

[0024] In these embodiments, spaced-apart metal barriers allow the heat exchange components to undergo localized elastic deformation under vibration loads, avoiding stress concentration; while integrated metal barriers reduce thermal deformation through material matching design.

[0025] In some embodiments, the heat exchange chamber includes multiple heat exchange channels, and the heat exchange mechanism further includes a water baffle plate disposed between the heat exchange element and the collector. The water baffle plate has a first through hole, through which part of the heat exchange channels communicates with the collector, and the water baffle plate is used to separate another part of the heat exchange channels and the collector.

[0026] In these embodiments, zoned control of the coolant is achieved by providing a water-blocking plate with selective flow guiding function between the heat exchanger and the current collector. The barrier effectively isolates specific heat exchange channels from the current collector, while the first through-hole allows other heat exchange channels to remain connected to the current collector. Therefore, the flow path of the coolant can be flexibly configured according to the different heat dissipation requirements of different areas of the battery.

[0027] In some embodiments, at least one side of the heat exchanger along a first direction is thermally connected to the large surface of the battery cell.

[0028] In these embodiments, the large-area heat exchange between the heat exchange element and the battery cell can effectively improve the heat exchange efficiency.

[0029] Secondly, this application provides an electrical device including a battery device according to any of the first aspects of the above embodiments, the battery device being used to provide electrical energy.

[0030] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0031] The features, advantages, and technical effects of exemplary embodiments of this application will now be described with reference to the accompanying drawings.

[0032] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0033] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0034] Figure 3 This is a schematic diagram of the structure of a battery module provided in one embodiment of this application;

[0035] Figure 4 This is a schematic diagram of the exploded structure of a single battery cell provided in an embodiment of this application;

[0036] Figure 5 This is a three-dimensional structural schematic diagram of a heat exchange mechanism provided in an embodiment of this application;

[0037] Figure 6 yes Figure 5 Enlarged view of section A;

[0038] Figure 7 This is a side view of a heat exchange mechanism provided in an embodiment of this application;

[0039] Figure 8 yes Figure 7Sectional view at point BB;

[0040] Figure 9 This is one of the cross-sectional structural schematic diagrams of a heat exchanger provided in an embodiment of this application;

[0041] Figure 10 This is a second cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application;

[0042] Figure 11 yes Figure 10 Exploded view of the heat exchanger;

[0043] Figure 12 This is a schematic diagram of the structure of a water-proof sheet provided in one embodiment of this application;

[0044] Figure 13 This is an exploded structural diagram of a heat exchanger provided in an embodiment of this application;

[0045] Figure 14 yes Figure 13 Enlarged view of section C;

[0046] Figure 15 yes Figure 13 Enlarged view of section D;

[0047] Figure 16 This is the third cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application;

[0048] Figure 17 This is the fourth cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application;

[0049] Figure 18 yes Figure 17 A schematic diagram of the non-metallic outer shell;

[0050] Figure 19 yes Figure 18 Enlarged view of section E in the middle;

[0051] Figure 20 This is the fifth cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application;

[0052] Figure 21 This is the sixth cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application;

[0053] Figure 22 This is the seventh cross-sectional structural schematic diagram of a heat exchanger provided in an embodiment of this application.

[0054] The accompanying drawings may not be drawn to scale.

[0055] Explanation of reference numerals in the attached figures:

[0056] 1000, vehicles;

[0057] 100. Battery assembly; 110. Controller; 120. Motor;

[0058] 200. Battery module;

[0059] 300. Enclosure; 301. First enclosure; 302. Second enclosure;

[0060] 10. Battery cell; 11. Housing; 12. Electrode assembly; 13. End cap assembly;

[0061] 4. Heat exchange mechanism; 41. Heat exchange component; 410. Heat exchange channel; 411. Non-metallic shell; 412. Barrier part; 412a. Non-metallic barrier part; 412b. Metallic barrier part; 413. Reinforcing part; 414. First protrusion; 415. First groove; 417. Recess; 417a. First side; 417b. Second side; 42. Current collector; 43. Water baffle; 431. First through hole. Detailed Implementation

[0062] 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.

[0063] 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.

[0064] In this application, the reference to "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places in the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment that is mutually exclusive with other embodiments.

[0065] 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.

[0066] 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 three cases: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0067] 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.

[0068] In this application, "multiple" means two or more (including two).

[0069] With the rapid development of new energy vehicles and energy storage technologies, the energy density and charging / discharging power of power battery packs are constantly increasing, leading to a sharp increase in the heat generated. An efficient and reliable thermal management system is crucial for ensuring the battery pack operates within a suitable temperature range, maintaining temperature uniformity between cells, preventing thermal runaway, and extending its service life. Among various heat dissipation solutions, liquid cooling plates have become the mainstream cooling method for large-capacity battery packs due to their excellent heat dissipation capabilities. Typically, liquid cooling plates are installed at the bottom of the battery module or between cells, carrying away heat through coolant in internal channels.

[0070] In related technologies, the heat exchange and cooling mechanism of a battery device involves setting up a current collector and a profile cold plate inside the battery device. The profile cold plate is directly embedded in the large surface between the battery cells, forming a "cell-cooling plate-cell" sandwich structure. However, this structure still has shortcomings in meeting the core requirements of large battery devices for thermal management systems, such as high safety, high reliability, vibration resistance, fatigue resistance, long-term stable contact at the interface, and lightweight design. This results in low reliability of the heat exchange and cooling mechanism, affecting the reliability and performance of the battery device.

[0071] To address the aforementioned issues, this application provides a battery device comprising a battery cell and a heat exchange mechanism. By employing a structural design combining a non-metallic shell and internal metal reinforcements, it improves upon the problems of poor vibration resistance, thermal stress warping, and electrochemical corrosion inherent in traditional aluminum alloy extruded cold plates. The non-metallic shell reduces the overall weight of the heat exchange components, exhibits stronger resistance to expansion and deformation, and possesses superior corrosion resistance. The metal reinforcements effectively support the non-metallic shell, reducing the risk of deformation and damage. The overall non-rigid structure provides better vibration resistance during vehicle operation, reduces the likelihood of vibration damage to the sealing interface, improves sealing performance, and enhances the long-term reliability of the heat exchange mechanism and the overall performance of the battery device.

[0072] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical equipment using battery devices.

[0073] Electrical equipment can include 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 equipment.

[0074] The battery device mentioned in the embodiments of this application refers to a single physical module comprising one or more battery cells to provide higher voltage and capacity. For example, the battery device mentioned in this application may include a battery module or battery pack. A battery device generally includes a housing for encapsulating one or more battery cells. The housing can prevent liquids or other foreign matter from affecting the charging or discharging of the battery cells.

[0075] In some embodiments, the battery device can be used in an energy storage device. The energy storage device may include an energy storage container, an energy storage cabinet, etc., and the battery device is used to store or provide electrical energy.

[0076] It should be understood that the technical solutions described in the embodiments of this application are not limited to the battery devices and electrical equipment described above, but can also be applied to all battery devices including housings and electrical equipment using battery devices. However, for the sake of brevity, the following embodiments are all illustrated using electric vehicles as examples.

[0077] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 100 is installed inside the vehicle 1000, and the battery device 100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000; for example, the battery device 100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 110 and a motor 120. The controller 110 is used to control the battery to supply power to the motor 120, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0078] In some embodiments of this application, the battery device 100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0079] Figure 2 A schematic diagram of the structure of a battery device according to an embodiment of this application is shown.

[0080] The battery device 100 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 10, which are connected in series, parallel, or mixed connections via a busbar.

[0081] In some embodiments, the battery cell assembly is typically formed by arranging a plurality of battery cells 10.

[0082] As an example, the battery cell assembly can be a battery module 200, which is formed by arranging and fixing multiple battery cells 10 into a single module. As an example, the battery module 200 can be formed by bundling multiple battery cells 10 together with cable ties.

[0083] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 300 and one or more battery cell assemblies housed in the housing 300.

[0084] As an example, the battery cell assembly can be a battery module 200, which can be housed in the housing 300 by fixing the battery module 200 in the housing 300.

[0085] As an example, the battery cell assembly can also be housed in the housing 300 by directly fixing multiple battery cells 10 to the housing 300.

[0086] As an example, the housing 300 may include a first housing 301 and a second housing 302. The first housing 301 and the second housing 302 are fastened together to form a closed space inside the housing 300 to house the battery cell assembly. Here, "closed" refers to covering or closing, and can be either sealed or unsealed. The first housing 301 may be a top cover or a bottom plate.

[0087] As an example, if the first housing 301 is located below the second housing 302, it can also be referred to as the lower housing, and the second housing 302 is referred to as the upper housing. The lower housing may include a bottom support plate, and the upper housing may include a top cover. The housing 300 also includes a frame connecting the bottom support plate and the top cover.

[0088] In some embodiments, the housing 300 may be part of the chassis structure of the vehicle 1000. For example, a portion of the housing 300 may be at least a portion of the floor of the vehicle 1000, or a portion of the housing 300 may be at least a portion of the crossbeams and longitudinal beams of the vehicle 1000.

[0089] Figure 3 A schematic diagram of the structure of a battery module according to an embodiment of this application is shown.

[0090] In some embodiments, such as Figure 2 and Figure 3 As shown, there are multiple battery cells 10. These multiple battery cells 10 are first connected in series, parallel, or in a mixed manner to form a battery module 200. The multiple battery modules 200 are then connected in series, parallel, or in a mixed manner to form a whole, which is housed in the casing 300.

[0091] Multiple battery cells 10 in the battery module 200 can be electrically connected through a busbar component to achieve parallel, series, or mixed connection of multiple battery cells 10 in the battery module 200.

[0092] In this application, the battery cell 10 may include lithium-ion battery cells, sodium-ion battery cells, or magnesium-ion battery cells, etc., and the embodiments of this application are not limited to this.

[0093] Figure 4 An exploded structural diagram of a battery cell according to an embodiment of this application is shown.

[0094] A battery cell 10 refers to the smallest unit that makes up a battery. A battery cell 10 includes a housing 11, an electrode assembly 12, and an end cap assembly 13.

[0095] Electrode assembly 12 is the component in the battery cell 10 where electrochemical reactions occur. The housing 11 may contain one or more electrode assemblies 12. The electrode assembly 12 is mainly formed by winding or stacking electrode sheets, which are divided into positive and negative electrode sheets, and a separator is usually provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the electrode body, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs can be located together at one end of the electrode body or separately at both ends of the electrode body. During the charging and discharging process of the battery cell 10, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0096] As an example, the battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application does not have any particular limitations.

[0097] The housing 11 and the end cap assembly 13 can be independent components. One or more openings can be provided on the housing 11, and one or more end cap assemblies 13 can close the openings to form the internal environment of the battery cell 10. Optionally, the end cap assembly 13 and the housing 11 can be integrated. Optionally, the end cap assembly 13 and the housing 11 can form a common connection surface before other components are inserted into the housing, and the end cap assembly 13 closes the housing 11 when it is necessary to encapsulate the interior of the housing 11.

[0098] In some embodiments, the end cap assembly 13 is provided with at least one electrode terminal, which is electrically connected to the electrode tab. The electrode terminal can be directly connected to the electrode tab or indirectly connected to the electrode tab through a current collector. In addition, the electrode terminal can be provided not only on the end cap assembly 13, but also on the housing 11.

[0099] Reference Figures 2 to 9 In a first aspect, this application proposes a battery device 100, which includes a battery cell 10 and a heat exchange mechanism 4. The heat exchange mechanism 4 includes a heat exchange element 41 and a current collector 42. The heat exchange element 41 is thermally connected to the battery cell 10 on at least one side along a first direction. The current collector 42 is disposed at at least one end of the heat exchange element 41 along a second direction. The heat exchange element 41 includes a non-metallic shell 411 and a metal reinforcing member located inside the non-metallic shell 411. The non-metallic shell 411 encloses a heat exchange cavity, which is in communication with the current collector 42. The non-metallic shell 411 is thermally connected to the battery cell 10. The metal reinforcing member is connected to at least one of two opposing inner wall surfaces of the non-metallic shell 411 in the first direction, where the first direction intersects the second direction.

[0100] The main function of the heat exchange mechanism 4 is to manage the heating and cooling of the battery device 100. It can remove the heat generated by the battery through heat conduction, heat convection, and heat radiation, ensuring that the battery operates within a suitable temperature range, thereby extending the battery's lifespan and improving its performance. This embodiment uses a liquid-cooled heat exchange mechanism 4 as an example. The liquid-cooled heat exchange mechanism 4 removes heat through the circulation of coolant within the heat exchange channel 410. This heat exchange method has high heat dissipation efficiency and good temperature uniformity.

[0101] The heat exchange mechanism 4 is thermally connected to the battery cell 10. This can be understood as follows: the heat exchange mechanism 4 is partially directly attached to or abuts against the battery cell 10; or the heat exchange mechanism 4 and the battery cell 10 are spaced apart, and the heat exchange mechanism 4 is connected to the battery cell 10 through a thermally conductive medium, which can be air, metal, or thermally conductive adhesive, etc. The heat exchange medium is stored and circulated within the heat exchange channel 410, and the heat exchange mechanism 4 is mainly responsible for transferring heat from the battery cell 10 to the heat exchange medium. Optionally, the heat exchange mechanism 4 can have thermally conductive contact with the outer surface of the battery cell 10.

[0102] For example, the heat exchanger 41 can be a harmonica tube plate with multiple heat exchange channels 410 formed inside. Specifically, it can be a heat dissipation structure using a wide harmonica tube, with at least a portion of the heat exchange channels 410 communicating with the inner cavity of the current collector 42 to achieve heat exchange medium flow. The heat exchanger 41 is thermally connected to the battery cell 10. For example, the heat exchanger 41 is in thermal contact with the bottom of the battery cell 10. Another example is that the heat exchanger 41 is in thermal contact with a large surface area of ​​the side surface of the battery cell 10. In this embodiment, one heat exchanger 41 can be sandwiched between two adjacent battery cells 10. Optionally, at least one side of the heat exchanger along the first direction is thermally connected to a large surface area of ​​the battery cell. The large surface area of ​​the battery cell refers to the surface with the largest area in the battery cell, which can effectively improve heat exchange efficiency.

[0103] The intersection of the first and second directions means that the first and second directions do not coincide or are not parallel, and the two directions are set at an angle. For example, the first direction can be parallel to the second direction. The heat exchanger 41 has a length direction (e.g., Figure 5 (as shown in the X-axis direction), width direction (as shown in the X-axis direction) Figure 5 As shown in the Y-axis direction), and the thickness direction (as shown in the figure). Figure 5 (As shown in the Z-axis direction), where the length direction, thickness direction, and height direction can be perpendicular to each other. In this embodiment, the first direction can be referenced to the thickness direction of the heat exchanger 41, the second direction can be referenced to the length direction of the heat exchanger 41, and the third direction can be referenced to the width direction of the heat exchanger 41.

[0104] It should be noted that the specific type of heat exchange medium is not limited here, as long as it can achieve a cooling effect on the battery cell 10, such as being gaseous or liquid. This embodiment uses a coolant as an example for description.

[0105] The current collector 42 is made of materials including but not limited to metals, non-metals, or a combination of metals and non-metals.

[0106] The collector 42 is a structure that connects the heat exchanger 41 and guides the heat exchange medium, used to connect the flow channels of multiple heat exchangers 41 in series to form a continuous cooling circuit. Optionally, each heat exchanger 41 may be provided with two collectors 42, which are respectively located at both ends of the heat exchanger 41 in the second direction. The collector 42 includes a shell with an inner cavity inside. The shell is open on one side facing the heat exchanger 41 to connect to one end of the heat exchanger 41. One end of the flow channel inside the heat exchanger 41 communicates with the inner cavity of the collector 42. The collector 42 can be sealed to the heat exchanger 41 by adhesive or mechanical connection.

[0107] Optionally, the two current collectors 42 corresponding to the same heat exchanger 41 are the same size and shape, and are symmetrically arranged at both ends of the heat exchanger 41 in the second direction.

[0108] The non-metallic outer shell 411 can be made of engineering plastics, composite materials, or other non-metallic materials with good thermal conductivity. The baffles 412 inside the outer shell can be made of metal or non-metal and are arranged in a specific manner to form heat exchange channels 410. The baffles 412 are used to separate adjacent heat exchange channels 410. The baffles 412 can be designed as flat, corrugated, or other shapes to optimize fluid flow and heat exchange efficiency.

[0109] Optionally, the metal reinforcement may include at least one of the metal barrier portion 412b and the reinforcement portion 413.

[0110] The non-metallic outer shell 411 in the heat exchanger 41 effectively reduces the overall weight while avoiding the risk of electrochemical corrosion of metallic materials in the coolant over a long period. The heat exchange channels formed by multiple barrier sections 412 can be designed with different flow channel shapes and densities according to actual needs, thereby providing differentiated cooling for different areas of the battery pack. The combined design of the non-metallic outer shell 411 and the metallic barrier section 412b balances structural strength and thermal conductivity. The non-metallic outer shell 411 provides good sealing and vibration resistance, while the metallic barrier section 412b ensures the heat exchanger 41 has sufficient structural strength.

[0111] In this embodiment, the battery device 100 includes a battery cell 10 and a heat exchange mechanism 4. By employing a structural design combining a non-metallic shell 411 with internal metal reinforcements, it improves upon the problems of poor vibration resistance, thermal stress warping, and electrochemical corrosion inherent in traditional aluminum alloy extruded cold plates. The non-metallic shell 411 reduces the overall weight of the heat exchange component 41, has stronger resistance to expansion and deformation, and better corrosion resistance. The metal reinforcements effectively support the non-metallic shell 411, reducing the risk of deformation and damage. The overall structure is non-rigid, exhibiting better vibration resistance during vehicle 1000 operation. The sealing interface is less susceptible to vibration damage, resulting in better sealing performance and improving the long-term reliability of the heat exchange mechanism 4 and the overall performance of the battery device 100.

[0112] In related technologies, cold-rolled steel plates made of metallic materials have the following problems:

[0113] 1. Material and process limitations lead to vibration resistance and sealing risks: Cold-rolled steel extruded profiles are integral rigid structures, and their material, wall thickness, and flow channel shape are all determined by the mold, resulting in low design freedom. Under long-term vehicle vibration and impact loads, the entire cold-rolled steel plate participates in vibration as a rigid body, which can easily lead to fatigue stress concentration at the welds connected to it (such as the weld at the manifold), posing a potential risk of coolant leakage. Once a leak occurs, it will directly lead to a short circuit and thermal runaway in the battery system.

[0114] 2. Thermal Stress Warping and Contact Thermal Resistance Issues: The cold plate is made of aluminum alloy, which has a high coefficient of thermal expansion. During charging and discharging, the upper surface of the cold plate is in close contact with the high-temperature battery cell, while the lower surface is in contact with the low-temperature coolant. This significant bidirectional temperature difference generates uneven thermal stress within the cold plate. For large, wide cold plates, this thermal stress is sufficient to cause macroscopic warping deformation. This deformation leads to uneven distribution of contact pressure between the cold plate and the battery cell, and may even create gaps, resulting in significant contact thermal resistance. This severely degrades heat dissipation efficiency, causing uneven battery pack temperature and greatly affecting battery life and fast-charging performance.

[0115] 3. Bottlenecks in weight reduction and corrosion resistance: To withstand installation, vibration, and coolant pressure, extruded cold-rolled steel plates must ensure sufficient wall thickness and rib thickness. This limits their lightweight design and hinders the improvement of the driving range of new energy vehicles. Furthermore, aluminum alloy materials are subject to long-term electrochemical corrosion in coolant. Corrosion weakens structural strength, and corrosion products may detach and block narrow flow channels, affecting flow rate and heat dissipation, raising questions about their long-term reliability.

[0116] 4. Design flexibility and cost issues: Extrusion dies are expensive, and once finalized, the shape, density, and layout of the flow channels are difficult to change, making it impossible to design differentiated and optimized cooling channels for different areas of the battery pack. Furthermore, the subsequent machining and welding processes are numerous, leaving room for overall cost optimization.

[0117] Compared to related technologies, the embodiments of this application employ a structural design combining a non-metallic outer shell 411 with internal metal reinforcements. This improves upon the problems of poor vibration resistance, thermal stress warping, and electrochemical corrosion inherent in traditional aluminum alloy extruded cold plates, reduces the weight of the heat exchange component 41, and allows for flexible adjustment of the heat exchange channel layout and size according to specific application requirements. Compared to traditional one-piece molded metal cold plates, this design offers greater design freedom. In summary, the embodiments of this application improve the long-term reliability of the heat exchange mechanism 4 and the performance of the battery device 100.

[0118] Reference Figure 9 In some embodiments, the non-metallic shell 411 is an integrally injection-molded part.

[0119] The non-metallic shell 411 is manufactured using a one-piece injection molding process. This process involves injecting molten non-metallic material into a mold cavity, which then cools and solidifies to form an integral structure with a predetermined shape. The non-metallic material can be selected from engineering plastics, composite materials, or other polymers with good thermal conductivity and mechanical strength. Optionally, polypropylene or polyamide materials can be selected due to their excellent chemical resistance and molding properties.

[0120] The material of the partial barrier 412 can be the same as that of the non-metallic shell 411. The metal barrier 412b can be pre-placed in the mold before injection molding and mechanically interlocked with the non-metallic shell 411 through overmolding; for the non-metallic barrier 412a, a co-injection molding process of the same material can be used to achieve a seamless connection.

[0121] The non-metallic outer shell 411 is made of a non-metallic material with good toughness. After the metal barrier part 412b is made, it can be fixed with a bracket, and then the barrier part 412b can be combined with the non-metallic outer shell 411 through processes such as injection molding and extrusion. Alternatively, the non-metallic outer shell 411 can be injection molded / extruded first, and then the pre-made metal barrier part 412b can be inserted. This solution is simple in process and low in cost. The pre-made barrier part 412 can be made into various shapes, and the injection molded parts can also be designed for more complex and refined harmonica tubes, which can improve design flexibility.

[0122] In these embodiments, the integrated molding process improves upon the assembly stress and sealing issues inherent in traditional split structures. Specifically, the integral molding of the non-metallic shell 411 eliminates weld seams or adhesive interfaces, reducing the risk of coolant leakage; while the integrated design of the metal reinforcements and shell enhances the overall structural integrity, making it less prone to relative displacement under vibration conditions. Furthermore, the injection molding process provides greater design freedom, allowing for flexible adjustments to the layout of the metal reinforcements to meet the heat dissipation needs of different areas, while reducing subsequent machining processes and lowering manufacturing costs. Compared to aluminum alloy extrusion molding, this solution offers better vibration resistance, sealing reliability, and lightweight advantages while ensuring heat dissipation performance.

[0123] Combined with reference Figures 9 to 15 In some embodiments, the metal reinforcement includes a reinforcement portion 413 disposed along a second direction, the reinforcement portion 413 being connected to the non-metallic housing 411, and the reinforcement portion 413 being located on the side of the non-metallic housing 411 facing the heat exchange channel 410.

[0124] The reinforcing section 413 can be made of metallic materials, such as aluminum alloy, stainless steel, or other high-strength materials. The reinforcing section 413 can be fixedly connected to the non-metallic outer shell 411 by bonding, welding, or mechanical fitting. Optionally, the reinforcing section 413 has a long strip structure, and its cross-sectional shape includes, but is not limited to, rectangle, trapezoid, or I-shape. Specifically, the reinforcing section 413 can extend continuously along the entire length of the heat exchanger 41, or it can be arranged in segments at intervals. The thickness of the reinforcing section 413 can be 1mm-5mm, and its width can be 5%-10% of the width of the heat exchanger 41.

[0125] The reinforcing part 413 is located directly on the heat exchange channel side, which can suppress the inward deformation of the non-metallic shell 411 under fluid pressure or thermal stress, thereby maintaining the stability of the heat exchange channel. Thus, on the one hand, the problem of increased flow resistance caused by channel deformation is avoided, and on the other hand, stable thermal contact with the battery cell 10 is ensured.

[0126] In these embodiments, by providing a reinforcing part 413 inside the non-metallic outer shell 411, the structural stiffness and deformation resistance of the heat exchanger 41 are effectively improved. Compared with an integral rigid metal cold plate, this embodiment achieves a balance between lightweight and structural strength through local reinforcement design, while avoiding the vibration transmission and thermal stress concentration problems caused by metal materials.

[0127] For example, the outer shell of the heat exchanger 41 is injection molded / extruded from a non-metallic material with good toughness, while the reinforcing part 413 is made of a metallic material. This can effectively address the deformation characteristics of the battery cell, where the deformation is large in the middle and small at both ends during thermal expansion. By adding a reinforcing part 413 as a support in the middle of the heat exchanger 41, the thermal expansion deformation resistance of the wide harmonica tube can be specifically improved.

[0128] After the reinforcing part 413 is manufactured, it can be fixed with a bracket, and then molded and glued to bond the reinforcing part 413 to the non-metallic shell 411. The reinforcing part 413 can penetrate a certain wall surface, increasing the contact area between the non-metallic shell 411 and the reinforcing part 413, and enhancing the connection strength between the two. Alternatively, in another process, the non-metallic shell 411 can be injection molded / extruded first, and then the pre-made metal reinforcing part 413 can be inserted. This solution has a simple process flow, low cost, and produces a lightweight heat exchanger 41.

[0129] The non-metallic outer shell 411 and the reinforcing portion 413 can be interlocked. In some embodiments, a first protrusion 414 is formed on the side of the non-metallic outer shell 411 facing the reinforcing portion 413, and a first groove 415 is formed on the side of the reinforcing portion 413 facing the non-metallic outer shell 411, with the first protrusion 414 embedded in the first groove 415; or, a second groove is formed on the side of the non-metallic outer shell 411 facing the reinforcing portion 413, with at least a portion of the reinforcing portion 413 embedded in the second groove.

[0130] In the engagement of the first protrusion 414 and the first groove 415, the first protrusion 414 can be a continuous elongated structure or a plurality of protrusions spaced apart. The shape of the first groove 415 matches the first protrusion 414 to achieve a tight fit. In another embodiment, the second groove can be a blind groove, and the portion of the reinforcing part 413 embedded in the second groove can be the entirety of the groove or a partial area thereof.

[0131] In these embodiments, the relative displacement between the reinforcing part 413 and the non-metallic shell 411 can be effectively limited by the cooperative structure of the protrusion and the groove, thereby increasing the contact area between the non-metallic shell 411 and the reinforcing part 413 and enhancing the connection strength between the two.

[0132] This embodiment prevents misalignment or separation of the heat exchanger 41 and the heat exchanger 41 when subjected to vibration or thermal stress. The first protrusion 414 is embedded in the first groove 415, providing more precise positioning, while the reinforcement 413 is embedded in the second groove, facilitating assembly. This structural design improves the overall structural stability of the heat exchanger 41. Furthermore, this mechanical interlocking structure does not add additional connecting parts, thus maintaining the lightweight characteristics of the heat exchanger 41.

[0133] In some embodiments, the metal reinforcement includes a metal barrier portion 412b, which is connected between two opposing inner wall surfaces of the non-metallic housing 411 in a first direction, so as to divide the heat exchange cavity into multiple heat exchange channels 410 by means of the metal barrier portion 412b.

[0134] In these embodiments, the metal barrier 412b can effectively support the two sides of the non-metallic shell 411 in the thickness direction, reducing the risk of deformation and damage, so that the heat exchange mechanism 4 has good seismic performance and a certain structural strength.

[0135] Reference Figure 10 and Figure 11 In some embodiments, the inner wall surface of the non-metallic housing 411 is provided with two opposing recesses 417, one end of the metal blocking part 412b in the first direction is embedded in one recess 417, and the other end of the metal blocking part 412b in the first direction is embedded in another recess 417.

[0136] The metal barrier portion 412b can be made of aluminum alloy, copper alloy, or other metal materials with good thermal conductivity. The recess 417 can be integrally formed on the inner wall of the non-metallic shell 411 by injection molding, and its shape can be designed as a U-shaped groove, a V-shaped groove, or other structures suitable for embedding the metal barrier portion 412b.

[0137] The mating methods between the metal barrier portion 412b and the recess 417 include, but are not limited to: using an interference fit to achieve tight fixation; providing a snap-fit ​​structure in the recess 417 to achieve mechanical locking; or applying thermally conductive adhesive to the contact surfaces of the metal barrier portion 412b and the recess 417 to enhance the connection strength. Optionally, both ends of the metal barrier portion 412b can be processed into protruding structures that match the shape of the recess 417, and embedded into the recess 417 through a hot-pressing process.

[0138] In these embodiments, a reliable connection between the metal and non-metal materials is achieved by embedding both ends of the metal barrier portion 412b into the recesses 417 of the non-metallic outer shell 411. The metal barrier portion 412b not only serves to separate the heat exchange channels but also effectively improves the thermal conductivity of the overall structure.

[0139] The non-metallic shell 411 has a low coefficient of thermal expansion, which can effectively suppress warping deformation caused by temperature difference; the embedded connection between the metal barrier part 412b and the recess 417 has good vibration resistance and can avoid stress concentration at the welded joint; at the same time, the non-metallic shell 411 has better corrosion resistance to coolant and extends the service life of the heat exchange mechanism 4.

[0140] Reference Figure 10 and Figure 11In some embodiments, at least a portion of the blocking portion 412 is inclined relative to the first direction; the recess 417 includes opposing first side 417a and second side 417b, the protrusion length of the first side 417a toward the heat exchange channel 410 is greater than the protrusion length of the second side 417b toward the heat exchange channel 410; wherein, the first side 417a of the two opposing recesses 417 are arranged close to each other, and the second side 417b of the two opposing recesses 417 are arranged far apart from each other.

[0141] The inclined arrangement of the barrier portion 412 can be achieved by changing its angle with the heat exchange channel, for example, by using an inclined angle of 30° to 60°. The recess 417 can adopt an asymmetrical U-shaped groove structure, wherein the thickness of one side wall of the U-shaped groove is greater than the thickness of the other side wall.

[0142] The first sides 417a of two opposing recesses 417 are arranged close to each other, while the second sides 417b of two opposing recesses 417 are arranged far apart from each other. This can be understood as follows: the distance between the two opposing first sides 417a in the width direction Y and the thickness direction Z is less than the distance between the two second sides 417b.

[0143] In these embodiments, this arrangement allows the longer protruding first side 417a to better support and fix the inclined barrier portion 412, thereby improving the stability of the barrier portion 412.

[0144] Reference Figure 12 In some embodiments, the heat exchange mechanism 4 further includes a water baffle 43, which is disposed between the heat exchange element 41 and the collector 42. The water baffle 43 is provided with a first through hole 431, through which part of the heat exchange channel 410 communicates with the collector 42. The water baffle 43 is used to separate another part of the heat exchange channel 410 and the collector 42.

[0145] The baffle plate 43 can be designed according to the required shape, for example, the multiple heat exchange channels 410 of the heat exchange element 41 can be formed into a serpentine connected channel.

[0146] In these embodiments, zoned control of the coolant is achieved by providing a water-blocking plate 43 with selective flow guiding function between the heat exchanger 41 and the current collector 42. The water-blocking plate 43 can effectively isolate the communication between a specific heat exchange channel and the current collector 42, while the first through hole 431 allows other heat exchange channels to remain in contact with the current collector 42. Thus, the flow path of the coolant can be flexibly configured according to the different heat dissipation requirements of different areas of the battery.

[0147] Reference Figure 16In some embodiments, the heat exchanger 41 further includes a plurality of non-metallic barrier portions 412a, which are connected between two opposing inner wall surfaces of the non-metallic outer shell 411 in a first direction, and at least a portion of the metallic barrier portions 412b are located between two adjacent non-metallic barrier portions 412a.

[0148] Optionally, the metal barrier 412b can be configured as a wavy or serrated structure.

[0149] In these embodiments, the non-metallic outer shell 411 and the barrier portions 412 at both ends can be made of a non-metallic material with good toughness, while the barrier portion 412 and the reinforcing portion 413 in the middle can be made of a metallic material as support, so as to specifically improve the resistance of the wide harmonica tube to thermal expansion deformation.

[0150] Reference Figures 17 to 22 In some embodiments, the metal barrier portion 412b and the non-metallic shell 411 enclose each other to form at least two heat exchange channels 410; and / or, the metal barrier portion 412b abuts against the adjacent non-metallic barrier portion 412a at one end in a third direction, and the first direction, the second direction and the third direction intersect each other.

[0151] The metal barrier portion 412b and the non-metallic housing 411 can be coupled in ways including but not limited to the following: the metal barrier portion 412b forms a mechanical interlocking structure with the non-metallic housing 411 through an insert injection molding process; the surface of the metal barrier portion 412b is provided with dovetail grooves or ribs to enhance the bonding strength with the non-metallic housing 411; the metal barrier portion 412b is made of copper alloy or stainless steel and formed into a continuous corrugated structure through a stamping process. The connection between the metal barrier portion 412b and the adjacent non-metallic barrier portion 412a can be achieved by interference fit, snap-fit ​​connection, or adhesive fixation.

[0152] In these embodiments, the overall weight is reduced while maintaining structural strength through a combination of metallic and non-metallic materials. The rigid support structure formed by the metallic barrier portion 412b effectively suppresses the deformation of the non-metallic outer shell 411 under fluid pressure.

[0153] Reference Figure 9 and Figure 10 In some embodiments, the metal reinforcement includes a plurality of metal barrier portions 412b; wherein the plurality of metal barrier portions 412b are sequentially spaced apart along a third direction; or, refer to Figure 17 , Figures 20 to 22 Multiple metal barrier parts 412b are connected in sequence to form an integral structure.

[0154] When the metal barrier portions 412b are spaced apart along the width direction, an independent heat exchange channel is formed between adjacent metal barrier portions 412b, and the coolant can flow through each channel to achieve zoned heat dissipation.

[0155] Optionally, the spacing between the metal barrier portions 412b can be differentiated according to the heat distribution of the battery cell 10. For example, denser metal barrier portions 412b can be arranged in high-heat areas to enhance local heat dissipation. When the metal barrier portion 412b is an integral structure, it is made of metal material and can be integrally formed by stamping or extrusion processes. The pre-fabricated metal barrier portion 412b is made into an integral shape and embedded into the wall of the non-metallic shell 411 by utilizing the conformal design of the two ends.

[0156] In these embodiments, the spaced metal barrier portions 412b allow the heat exchanger 41 to undergo local elastic deformation under vibration loads, thus avoiding stress concentration; while the integral metal barrier portion 412b reduces thermal deformation through material matching design.

[0157] The internal cavity shape of heat exchanger 41 includes, but is not limited to, triangles, quadrilaterals, trapezoids, arcs, etc. For some implementation examples, please refer to the internal cavity cross-section. Figure 9 , Figure 16 , Figure 17 ,as well as Figures 20 to 22 .

[0158] Secondly, embodiments of this application provide an electrical device including a battery device 100 according to any of the embodiments of the first aspect described above. The battery device 100 is used to provide electrical energy to the electrical device.

[0159] The electrical equipment can be any of the aforementioned devices or systems that utilize battery devices 100.

[0160] Please see Figures 1 to 11According to some embodiments of this application, this application provides a battery device 100, including a battery cell 10 and a heat exchange mechanism 4. The heat exchange mechanism 4 includes a heat exchange element 41 and a current collector 42. The heat exchange element 41 is thermally connected to the battery cell 10 at least one side along a first direction. The current collector 42 is disposed at at least one end of the heat exchange element 41 along a second direction. The heat exchange element 41 includes a non-metallic shell 411 and a metal reinforcement located inside the non-metallic shell 411. The non-metallic shell 411 encloses a heat exchange cavity, which communicates with the current collector 42. The non-metallic shell 411 is thermally connected to the battery cell 10. The metal reinforcement is connected to at least one of two opposing inner wall surfaces of the non-metallic shell 411 in the first direction, where the first direction intersects the second direction. The non-metallic shell 411 is an integrally injection-molded part. The metal reinforcement includes a reinforcing portion 413 disposed along the second direction. The reinforcing portion 413 is connected to the non-metallic shell 411, and the reinforcing portion 413 is located on the side of the non-metallic shell 411 facing the heat exchange channel 410. The metal reinforcement includes a metal barrier 412b, which is connected between two opposing inner wall surfaces of the non-metallic outer shell 411 in a first direction, to divide the heat exchange chamber into multiple heat exchange channels 410. The heat exchange mechanism 4 also includes a water baffle 43, which is disposed between the heat exchange member 41 and the collector 42. The water baffle 43 has a first through hole 431, through which part of the heat exchange channel 410 communicates with the collector 42. The water baffle 43 is used to separate another part of the heat exchange channel 410 and the collector 42.

[0161] Although this application has been described with reference to preferred embodiments, various modifications can be made thereto and components can be replaced with equivalents without departing from the scope of this application. In particular, the technical features mentioned in the various embodiments can be combined in any manner, provided there is no structural conflict. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Battery cell; A heat exchange mechanism includes a heat exchange element and a current collector. The heat exchange element is thermally connected to the battery cell on at least one side along a first direction. The current collector is disposed at at least one end of the heat exchange element along a second direction. The heat exchange element includes a non-metallic shell and a metal reinforcement located inside the non-metallic shell. The non-metallic shell encloses a heat exchange cavity, which is in communication with the current collector. The non-metallic shell is thermally connected to the battery cell. The metal reinforcement is connected to at least one of two opposing inner wall surfaces of the non-metallic shell in the first direction. The first direction intersects the second direction. The metal reinforcement includes a metal barrier portion, which is connected between two opposing inner wall surfaces of the non-metallic shell in the first direction, so as to divide the heat exchange cavity into multiple heat exchange channels through the metal barrier portion. The inner wall surface of the non-metallic shell is provided with two opposing recesses. The metal barrier is embedded in one of the recesses at one end in the first direction, and the metal barrier is embedded in the other recess at the other end in the first direction.

2. The battery device according to claim 1, characterized in that, The metal reinforcement includes a reinforcement portion disposed along the second direction, the reinforcement portion being connected to the non-metallic outer shell, and the reinforcement portion being located on the side of the non-metallic outer shell facing the heat exchange cavity.

3. The battery device according to claim 2, characterized in that, The non-metallic outer shell has a first protrusion on the side facing the reinforcing part, and the reinforcing part has a first groove on the side facing the non-metallic outer shell, with the first protrusion embedded in the first groove; Alternatively, a second groove is formed on the side of the non-metallic outer casing facing the reinforcing part, and at least a portion of the reinforcing part is embedded in the second groove.

4. The battery device according to claim 1, characterized in that, At least a portion of the metal barrier portion is inclined relative to the first direction; The recess includes a first side and a second side opposite to each other, wherein the protrusion length of the first side toward the heat exchange channel is greater than the protrusion length of the second side toward the heat exchange channel. In this configuration, the first sides of two opposing recesses are positioned close to each other, while the second sides of two opposing recesses are positioned far apart from each other.

5. The battery device according to claim 1, characterized in that, The heat exchanger also includes a plurality of non-metallic barrier sections, which are connected between two opposing inner wall surfaces of the non-metallic shell in the first direction, and at least a portion of the metallic barrier sections are located between two adjacent non-metallic barrier sections.

6. The battery device according to claim 5, characterized in that, The metal barrier and the non-metallic outer shell enclose each other to form at least two heat exchange channels; And / or, the metal barrier portion abuts against the adjacent non-metallic barrier portion at one end in a third direction, wherein the first direction, the second direction, and the third direction intersect each other.

7. The battery device according to claim 1, characterized in that, The non-metallic shell is a one-piece injection molded part.

8. The battery device according to any one of claims 1 to 7, characterized in that, The metal reinforcement includes multiple metal barrier portions; wherein... The plurality of metal barrier portions are arranged at intervals along a third direction; Alternatively, multiple metal barrier portions may be connected sequentially to form an integral structure.

9. The battery device according to any one of claims 1 to 7, characterized in that, The heat exchange chamber includes multiple heat exchange channels, and the heat exchange mechanism also includes a water baffle plate. The water baffle plate is disposed between the heat exchange element and the collector. The water baffle plate has a first through hole. Part of the heat exchange channels communicate with the collector through the first through hole. The water baffle plate is used to separate another part of the heat exchange channels and the collector.

10. The battery device according to any one of claims 1 to 7, characterized in that, The heat exchanger is thermally connected to the large surface of the battery cell on at least one side along the first direction.

11. An electrical appliance, characterized in that, The battery device includes any one of claims 1 to 10, the battery device being used to provide electrical energy.

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