Battery device, electric device, and energy storage device

Abstract

The application provides a battery device, an electric device and an energy storage device, and belongs to the technical field of batteries. The battery device comprises a box body, a battery monomer assembly, an electrical component and a heat exchange component. The battery monomer assembly comprises at least one battery monomer, and the battery monomer assembly is accommodated in the box body. The electrical component is accommodated in the box body, and the electrical component is located at one end of the battery monomer assembly along a first direction. The heat exchange component comprises a first heat exchange component and a second heat exchange component. The first heat exchange component is in heat conduction connection with the electrical component. The second heat exchange component is in heat conduction connection with a first end surface of the battery monomer assembly facing the electrical component. The first heat exchange component and the second heat exchange component are communicated through a pipeline, so that a heat exchange medium can flow between the first heat exchange component and the second heat exchange component, thereby realizing heat exchange between the heat exchange component and the electrical component. Through the heat exchange component, the heat generated during the operation of the electrical component can be used to preheat the first end surface of the battery monomer assembly, and the performance of the battery monomers around the first end surface is improved.

Description

Technical Field

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

[0002] Energy conservation and emission reduction are key to sustainable social development, and electric vehicles, due to their energy-saving and environmentally friendly advantages, have become an important component of the automotive industry's sustainable development. For electric vehicles, battery technology is a crucial factor in their development.

[0003] Battery performance is affected by temperature, especially in low-temperature environments, where preheating is necessary. Therefore, improving the preheating effect is a noteworthy issue. Summary of the Invention

[0004] This application aims to at least solve one of the technical problems existing in the background art. Therefore, one object of this application is to provide a battery device, an electrical device, and an energy storage device to improve the preheating effect of the battery.

[0005] An embodiment of the first aspect of this application provides a battery device, including: a housing, a battery cell assembly, an electrical component, and a heat exchange component; the battery cell assembly includes at least one battery cell and is housed in the housing; the electrical component is housed in the housing and is located at one end of the battery cell assembly along a first direction; the heat exchange component is thermally connected between the first end face of the battery cell assembly facing the electrical component and the electrical component, the heat exchange component includes a first heat exchange element and a second heat exchange element, the first heat exchange element is thermally connected to the electrical component, the second heat exchange element is thermally connected to the first end face of the battery cell assembly, and the first heat exchange element and the second heat exchange element are connected by a pipeline so that a heat exchange medium can flow between the first heat exchange element and the second heat exchange element, thereby realizing heat exchange between the heat exchange component and the electrical component.

[0006] In the technical solution of this application embodiment, the heat generated by the electrical components during operation can be transferred to the first end face of the battery cell assembly through a heat exchange component, thereby preheating the first end face of the battery cell assembly and improving the poor preheating effect at the first end face, thus enhancing the performance of the battery cells around the first end face. Simultaneously, in this embodiment, the heat exchange component can also be used to dissipate heat from the electrical components, thereby improving their performance. Furthermore, since the heat from the electrical components is transferred to the first end face, no additional heat source is needed to heat the first end face, saving energy and reducing costs. By setting a first heat exchange component and a second heat exchange component, the first heat exchange component can be placed at any desired location on the electrical components, and the second heat exchange component can be placed on the first end face. The placement of the heat exchange components is more flexible, minimizing their volume and improving space utilization. Simultaneously, heat exchange between the electrical components and the first end face can be achieved, utilizing the heat generated by the electrical components to preheat the first end face, improving the preheating effect and the performance of the battery cell assembly.

[0007] In some embodiments, the first heat exchanger includes a first heat exchanger body, a driving unit, and a temperature control switch. The first heat exchanger body is thermally connected to the electrical component. The temperature control switch is disposed between the first heat exchanger body and the electrical component and is used to detect the temperature of the electrical component. The driving unit is disposed on the first heat exchanger body and is used to drive the heat exchange medium to flow when the temperature of the electrical component reaches a preset opening temperature.

[0008] In this embodiment, by setting a drive unit and a temperature control switch, the flow of the heat exchange medium can be controlled according to the temperature of the electrical components, thereby quickly achieving heat exchange. While preheating the first end face, the electrical components can also be cooled in time, improving the performance of the electrical components and battery cell assembly.

[0009] In some embodiments, the first heat exchanger body has a plurality of first flow channels for circulating heat exchange medium, and the first heat exchanger body also has a first interface and a second interface respectively connected to the second heat exchanger, and the plurality of first flow channels are connected between the first interface and the second interface.

[0010] By setting multiple first flow channels inside the first heat exchanger body, the contact between the first heat exchanger and the electrical components can be improved, and heat exchange can be achieved quickly.

[0011] In some embodiments, the first heat exchanger body extends along a second direction perpendicular to the first direction, the first interface and the second interface are respectively located at both ends of the first heat exchanger body along the second direction, and the first interface and the second interface are respectively connected to the second heat exchanger through pipelines.

[0012] By setting the first interface and the second interface at both ends of the first heat exchanger body along the second direction, the inlet and outlet of the heat exchange medium can be separated by a greater distance, reducing heat loss and improving heat exchange efficiency.

[0013] In some embodiments, the drive unit is further configured to stop driving the flow of heat exchange medium when the temperature of the electrical component reaches a preset shut-off temperature.

[0014] In this embodiment, when the temperature of the electrical component drops to the preset shut-off temperature, the flow of the heat exchange medium in the heat exchange component can be stopped, so that the electrical component can always operate at a lower temperature, which improves its performance and saves resources and reduces waste.

[0015] In some embodiments, the electrical component includes a housing and electrical components disposed in the housing, a first heat exchanger disposed outside the housing, and the first heat exchanger being attached to the bottom of the housing.

[0016] In this embodiment, by setting a first heat exchanger on the bottom outside of the box, heat can be exchanged in areas where the electrical components have poor heat dissipation, thereby further improving the cooling effect on the electrical components.

[0017] In some embodiments, the electrical components include high-voltage components disposed at the bottom of the housing.

[0018] In this embodiment, the high-pressure component is placed at the bottom of the box, so that the first heat exchanger can be closer to the high-pressure component that generates more heat, shortening the heat exchange path and improving the heat exchange efficiency between the electrical components and the first heat exchanger.

[0019] In some embodiments, the electrical components include a high-voltage box, which contains at least one of a CSC control module, a BMU control module, a current relay, and a current fuse.

[0020] In this embodiment, the high-voltage box can integrate the electrical architecture of the battery device, such as the CSC control module, BMU control module, current relay, and current fuse, thus achieving the requirements of miniaturization and lightweighting.

[0021] In some embodiments, the second heat exchanger extends along a second direction perpendicular to the first direction, and the second heat exchanger is attached to the first end face of the battery cell assembly.

[0022] In this embodiment, extending the second heat exchanger along the second direction can increase the heat exchange area between the second heat exchanger and the first end face, thereby further improving the heat exchange efficiency.

[0023] In some embodiments, the second heat exchanger has a plurality of second flow channels for circulating heat exchange medium, and the second heat exchanger also has a third interface and a fourth interface respectively connected to the first heat exchanger, with the plurality of second flow channels connected between the third interface and the fourth interface.

[0024] By setting multiple second flow channels inside the second heat exchanger, the contact between the second heat exchanger and the first end face can be improved, and heat exchange can be achieved quickly.

[0025] In some embodiments, the third interface and the fourth interface are connected to the side of the second heat exchanger away from the first end face, and the third interface and the fourth interface are respectively connected to the first heat exchanger through pipelines.

[0026] In this embodiment, by setting the third and fourth interfaces at positions away from the first end face of the second heat exchanger, it is easier for the second heat exchanger to fit against the first end face, thereby improving the heat exchange effect.

[0027] In some embodiments, the first heat exchanger and / or the second heat exchanger are made of metallic material.

[0028] In this embodiment, the thermal conductivity of metal materials is better. By making at least one of the first heat exchanger and the second heat exchanger into a metal material, the heat exchange effect between the heat exchanger and the first end face or electrical component can be further improved.

[0029] In some embodiments, the heat exchange component may further include a third heat exchange element, which is thermally connected to the second end face of the battery cell assembly away from the electrical component, and the third heat exchange element is also connected to the first heat exchange element so that the heat exchange medium can flow between the third heat exchange element and the first heat exchange element.

[0030] In this embodiment, since the first end face and the second end face are opposite each other, and the second end face is mostly composed of the large surface of the battery cell, heat is easily dissipated and the temperature drops quickly compared to other surfaces of the battery cell assembly. In this embodiment, by setting a third heat exchanger on the second end face, the heat generated when the electrical components are working can be transferred to the second end face of the battery cell assembly through the third heat exchanger and the first heat exchanger, thereby preheating the second end face of the battery cell assembly. This improves the problem of poor preheating effect of the battery cell assembly at the second end face and enhances the performance of the battery cells around the second end face.

[0031] In some embodiments, the housing is further provided with a heating element for preheating the battery cell assembly. The heating element includes a first heating section and a second heating section. The battery cell assembly includes a first region and a second region. The first region is the region where the end of the battery cell assembly facing away from the first end face is located. The second region is the remaining region of the battery cell assembly excluding the first region. The first heating section is used to heat the battery cells in the first region, and the second heating section is used to heat the battery cells in the second region. The heating power of the first heating section is higher than the heating power of the second heating section.

[0032] In this embodiment, the two ends of the battery cell assembly along the first direction are more prone to heat loss and experience a faster temperature drop compared to other surfaces of the battery cell assembly. The first heating section can preheat the first region, and the second heating section can preheat the second region. Furthermore, because the first heating section has high heating power, it can preheat the end of the battery cell assembly away from the electrical components, and the high preheating power helps to mitigate the problem of rapid temperature drop at that end leading to a decrease in battery cell performance.

[0033] In some embodiments, the battery device further includes a cooling component disposed between the battery cell assembly and the housing, the cooling component being used to absorb heat from the battery cell assembly.

[0034] In this embodiment, by providing a cooling component, the heat generated by the battery device during operation can be dissipated, thereby improving the phenomenon of performance degradation caused by excessively high temperature of individual battery cells.

[0035] An embodiment of the second aspect of this application provides an electrical device that includes the battery device described in the above embodiments, the battery device being used to provide electrical energy.

[0036] An embodiment of the third aspect of this application provides an energy storage device, which includes the battery device in the above embodiments, and the energy storage device is used to store electrical energy.

[0037] 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

[0038] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0039] Figure 1This application provides structural schematic diagrams of vehicles for some embodiments;

[0040] Figure 2 This is an exploded view of the battery device provided in some embodiments of this application;

[0041] Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application;

[0042] Figure 4 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application;

[0043] Figure 5 for Figure 4 A magnified view of a section at point A in the middle;

[0044] Figure 6 for Figure 5 Structural diagrams of the electrical components and heat exchange components;

[0045] Figure 7 for Figure 6 Schematic diagram of the structure of the electrical components and the first heat exchanger;

[0046] Figure 8 for Figure 7 A schematic diagram of the decomposed structure;

[0047] Figure 9 for Figure 7 A sectional view of the electrical components;

[0048] Figure 10 for Figure 6 Schematic diagram of the structure of the second heat exchanger;

[0049] Figure 11 for Figure 10 The front view;

[0050] Figure 12 for Figure 11 Sectional view at point BB;

[0051] Figure 13 Another structural schematic diagram of the electrical components and heat exchange components provided in the embodiments of this application;

[0052] Figure 14 This is a schematic diagram of the structure of the heating element and battery cell assembly provided in the embodiments of this application.

[0053] Explanation of reference numerals in the attached figures:

[0054] 1000 vehicles;

[0055] Battery unit 100, controller 200, motor 300;

[0056] Battery cell assembly 10, battery cell 11, end cap 12, housing 13, electrode assembly 14, first region 15, second region 16, first end face 111, second end face 112.

[0057] Electrical components 400, housing 410, electrical parts 420, high voltage components 421, CSC control module 422, BMU control module 423, current relay 424;

[0058] Heat exchange component 500, first heat exchange component 510, first heat exchange component body 511, temperature control switch 512, first flow channel 513, first interface 514, second interface 515, drive unit 516, second heat exchange component 520, second flow channel 521, third interface 522, fourth interface 523, third heat exchange component 530, pipeline 540;

[0059] Heating element 600, first heating section 610, second heating section 620;

[0060] Box 20, Part 1 21, Part 2 22. Detailed Implementation

[0061] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application and are therefore merely examples, and should not be used to limit the scope of protection of this application.

[0062] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0063] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0064] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0065] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, "a and / or b" can represent three cases: a exists alone, a and b exist simultaneously, and b exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0066] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).

[0067] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0068] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0069] Currently, the application of rechargeable batteries is becoming increasingly widespread, judging from market trends. They are not only used in energy storage systems for hydropower, thermal power, wind power, and solar power plants, but also extensively in various electronic devices, such as electric bicycles, electric motorcycles, and electric vehicles, as well as in military equipment and aerospace. As the application areas of rechargeable batteries continue to expand, the market demand is also constantly increasing.

[0070] Battery performance is affected by temperature, especially in low-temperature environments such as winter. It is necessary to preheat the battery. In related technologies, a heating film is installed in the battery. The heating film can be placed at the bottom of the battery, and the battery performance can be improved by heating.

[0071] However, batteries in related technologies typically include a battery pack and a high-voltage box at one end. The high-voltage box contains many electrical components, making it difficult to install a heating film. Furthermore, the end face of the battery pack dissipates heat too quickly compared to other parts, resulting in poor preheating of individual battery cells at the end face of the battery pack and reduced performance.

[0072] In addition, the high-voltage box integrates many electrical components, which accumulate a lot of heat during operation, resulting in a high temperature and affecting the performance of the electrical components in the high-voltage box.

[0073] To address at least one of the aforementioned problems, embodiments of this application provide a battery device, an electrical device, and an energy storage device. The battery device includes: a housing, a battery cell assembly, electrical components, and a heat exchange component. The battery cell assembly includes at least one battery cell and is housed within the housing. The electrical components are housed within the housing and are located at one end of the battery cell assembly along a first direction. The heat exchange component is thermally connected between the first end face of the battery cell assembly facing the electrical components and the electrical components. The heat exchange component includes a first heat exchanger and a second heat exchanger. The first heat exchanger is thermally connected to the electrical components, and the second heat exchanger is thermally connected to the first end face of the battery cell assembly. The first and second heat exchangers are connected via a pipeline to allow a heat exchange medium to circulate between the first and second heat exchangers, thereby achieving heat exchange between the heat exchange component and the electrical components. Heat exchange components can transfer the heat generated during the operation of electrical components to the first end face of the battery cell assembly, thereby preheating the first end face of the battery cell assembly. This improves the poor preheating effect at the first end face, enhances the performance of the battery cells around the first end face, and simultaneously reduces the temperature of the electrical components, improving their performance. By incorporating both a first and a second heat exchanger, the first heat exchanger can be placed at any desired location on the electrical component (e.g., a high-heat-generating area), while the second heat exchanger is placed on the first end face. This allows for greater flexibility in the placement of the heat exchanger components, minimizing their size and improving space utilization.

[0074] The technical solutions described in the embodiments of this application are applicable to battery devices with preheating functions, electrical devices using battery devices, and energy storage devices.

[0075] The energy storage device utilizing battery devices as a power source in this application embodiment includes one or more battery clusters to enhance the voltage and capacity of the energy storage device. A battery cluster may include multiple battery devices, which are connected in series via a busbar to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0076] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices. As an example, the energy storage device is an energy storage container or an energy storage cabinet.

[0077] In this application embodiment, the power-consuming device using a battery as a power source can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0078] It should be understood that the technical solutions described in the embodiments of this application are not limited to the energy storage devices and electrical devices described above, but can also be applied to all battery devices that require preheating and electrical devices that use battery devices. However, for the sake of brevity, the following embodiments will use a vehicle as an example of an electrical device.

[0079] 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 200 and a motor 300. The controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0080] 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.

[0081] Please refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery provided in some embodiments of this application.

[0082] The battery device 100 mentioned in the embodiments of this application may include a battery cell assembly 10 for providing voltage and capacity. The battery cell assembly 10 may include a plurality of battery cells 11, which are connected in series, parallel or mixed connection via a busbar.

[0083] In some embodiments, the battery cell assembly 10 is typically formed by arranging a plurality of battery cells 11.

[0084] As an example, the battery cell assembly 10 may include one or more battery modules, which are formed by arranging and fixing multiple battery cells 11 to form an independent module. As an example, the battery module may be formed by bundling multiple battery cells 11 together with cable ties.

[0085] In some embodiments, such as Figure 2 As shown, the battery device 100 can be a battery pack, which includes a housing 20 and battery cell assemblies 10, with the battery cell assemblies 10 housed within the housing 20. The housing 20 can be a simple three-dimensional structure such as a single cuboid, cylinder, or sphere, or a complex three-dimensional structure composed of simple three-dimensional structures such as cuboids, cylinders, or spheres. The material of the housing 20 can be an alloy material such as aluminum alloy or iron alloy, a polymer material such as polycarbonate or polyisocyanurate foam, or a composite material such as glass fiber and epoxy resin.

[0086] As an example, the battery cell assembly 10 may include a battery module, which can be housed in the housing 20 by fixing the battery module in the housing 20.

[0087] As an example, the battery cell assembly 10 can also be housed in the housing 20 by directly fixing multiple battery cells 11 to the housing 20.

[0088] As an example, the housing 20 may include a first part 21 and a second part 22. The first part 21 and the second part 22 are fastened together to form a closed space inside the housing 20 to house the battery cell assembly 10. Here, "closed" refers to covering or closing, and can be either non-sealed or sealed to prevent liquids or other foreign objects from affecting the charging or discharging of the battery cell 11. The first part 21 may be a top cover or a bottom plate.

[0089] As an example, the housing 20 may include a top cover, a frame, and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that the interior of the housing 20 forms an enclosed space to house the battery cell assembly 10.

[0090] In some embodiments, the housing 20 may be part of the vehicle's chassis structure. For example, a portion of the housing 20 may be at least a portion of the vehicle's floor, or a portion of the housing 20 may be at least a portion of the vehicle's crossbeams and longitudinal beams.

[0091] The battery cell 11 provided in the embodiments of this application can be a secondary battery. A secondary battery refers to a battery cell 11 that can be used again after being discharged by recharging to activate the active material.

[0092] The battery cell 11 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.

[0093] Please refer to Figure 3 , Figure 3 This is an exploded structural diagram of a battery cell provided in some embodiments of this application. The battery cell 11 refers to the smallest unit that makes up the battery. For example... Figure 3 The battery cell 11 includes an end cap 12, a housing 13, an electrode assembly 14, and other functional components.

[0094] End cap 12 refers to a component that covers the opening of housing 13 to isolate the internal environment of battery cell 11 from the external environment. The shape of end cap 12 can be adapted to the shape of housing 13 to fit it. In some embodiments, end cap 12 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 12 is less prone to deformation under pressure and impact, enabling battery cell 11 to have higher structural strength and improved safety performance. Functional components such as electrode terminals can be provided on end cap 12. Electrode terminals can be used for electrical connection with electrode assembly 14 for outputting or inputting electrical energy to battery cell 11. In some embodiments, end cap 12 can also be provided with a pressure relief mechanism for releasing internal pressure when the internal pressure or temperature of battery cell 11 reaches a threshold. The material of end cap 12 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. In some embodiments, an insulating element may be provided on the inner side of the end cap 12. The insulating element can be used to isolate the electrical connection components within the housing 13 from the end cap 12 to reduce the risk of short circuits. For example, the insulating element may be made of plastic, rubber, etc.

[0095] The housing 13 is a component used to cooperate with the end cap 12 to form the internal environment of the battery cell 11. This internal environment can accommodate the electrode assembly 14, electrolyte, and other components. The housing 13 and the end cap 12 can be independent components. An opening can be provided on the housing 13, and the end cap 12 closes the opening to form the internal environment of the battery cell 11. Alternatively, the end cap 12 and the housing 13 can be integrated. Specifically, the end cap 12 and the housing 13 can form a common connecting surface before other components are inserted into the housing. When it is necessary to encapsulate the interior of the housing 13, the end cap 12 closes the housing 13. The housing 13 can be of various shapes and sizes, such as cuboid, cylindrical, hexagonal prism, etc. Specifically, the shape of the housing 13 can be determined according to the specific shape and size of the electrode assembly 14. The housing 13 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0096] Electrode assembly 14 is the component in the battery cell 11 where the electrochemical reaction takes place. The housing 13 may contain one or more electrode assemblies 14. Electrode assembly 14 is mainly formed by winding and forming positive and negative electrode plates, and a separator is typically provided between the positive and negative electrode plates. The portions of the positive and negative electrode plates containing active material constitute the main body of the electrode assembly.

[0097] Figure 4 This is a partial structural schematic diagram of a battery device provided in some embodiments of this application; Figure 5 for Figure 4 A magnified view of a section at point A in the middle; Figure 6 for Figure 5 Structural diagrams of the electrical components and heat exchange components; Figure 7 for Figure 6 Schematic diagram of the structure of the electrical components and the first heat exchanger; Figure 8 for Figure 7 A schematic diagram of the decomposed structure; Figure 9 for Figure 7 A sectional view of the electrical components. Please refer to... Figures 4 to 9This application provides a battery device 100, including: a housing 20, a battery cell assembly 10, an electrical component 400, and a heat exchange component 500; the battery cell assembly 10 includes at least one battery cell 11, and the battery cell assembly 10 is housed in the housing 20; the electrical component 400 is housed in the housing 20, and the electrical component 400 is located at one end of the battery cell assembly 10 along a first direction X; the heat exchange component 500 is thermally connected to the first end face 111 of the battery cell assembly 10 facing the electrical component 400 and... Between the electrical components 400, the heat exchange component 500 includes a first heat exchange component 510 and a second heat exchange component 520. The first heat exchange component 510 is thermally connected to the electrical components 400, and the second heat exchange component 520 is thermally connected to the first end face 111 of the battery cell assembly 10. The first heat exchange component 510 and the second heat exchange component 520 are connected through a pipe 540 so that the heat exchange medium can flow between the first heat exchange component 510 and the second heat exchange component 520, thereby realizing heat exchange between the heat exchange component 500 and the electrical components 400.

[0098] In this embodiment, the battery cell assembly 10 can be a collective term for all battery cells in the battery device. The first direction X can be the length direction of the battery device; it can be understood that the first direction X can also be consistent with the thickness direction of the battery cells in the battery cell assembly 10, that is, the large surface area of ​​the battery cell 11 (…). Figure 3 The surface parallel to the YZ plane is perpendicular to the first direction X. The second direction Y can be the width direction of the battery device, and the third direction Z can be the height direction of the battery device, with the first direction X, the second direction Y, and the third direction Z being perpendicular to each other.

[0099] The battery cell assembly 10, electrical component 400, and heat exchange component 500 can be housed within the housing 20. The electrical component 400 can be located at one end of the battery cell assembly 10 along the first direction X. The end face of the battery cell assembly 10 facing the electrical component 400 can be a first end face 111, that is, the first end face 111 can be the end face of the battery cell assembly 10 along the first direction X, and this end face is close to the electrical component 400.

[0100] It is understood that in some embodiments, the first end face 111 may be composed of multiple large faces of individual battery cells arranged side by side. For example Figure 4 The image shows four battery modules arranged along the second direction Y. Each battery module includes multiple battery cells arranged along the first direction X. The large surfaces of the battery cells at one end of the four battery modules along the first direction X together form the first end face 111.

[0101] Electrical component 400 may include one or more electronic and electrical components, such as chips, conductive elements, fuses, etc. It is understood that electrical component 400 generates heat and has a high temperature when it is working.

[0102] The heat exchange component 500 can be thermally connected between the first end face 111 and the electrical component 400. Thermal connection refers to the connection method that enables heat exchange between the two, which can be direct contact, fit, or indirect contact or connection through other components.

[0103] In this embodiment, the heat exchange component 500 may include a first heat exchange component 510 and a second heat exchange component 520 that are interconnected. The first heat exchange component 510 may have a space inside capable of accommodating a heat exchange medium, and the second heat exchange component 520 may also have a space inside capable of accommodating a heat exchange medium. It can be understood that the first heat exchange component 510 and the second heat exchange component 520 can be two independent components, connected by a pipe 540. The heat exchange medium can flow between the first heat exchange component and the second heat exchange component. The heat exchange medium can be a fluid medium such as water.

[0104] The piping can be a common conduit or a passageway structure with internal channels. The conduit can be a rigid pipe or a flexible pipe. In some embodiments, the piping can be a flexible hose that can be bent at will, thereby allowing the piping to be arranged reasonably according to the internal space of the battery device and improving space utilization.

[0105] The first heat exchanger 510 can be thermally connected to the electrical component 400. For example, the first heat exchanger can be attached to a heat-concentrated area of ​​the electrical component (an area with high heat generation or poor heat dissipation). The second heat exchanger 520 can be thermally connected to the first end face 111. For example, it can be attached to the first end face 111. The first heat exchanger 510 and the second heat exchanger 520 can be made of thermally conductive materials, thereby improving the efficiency of heat exchange.

[0106] The shape of the first heat exchanger 510 can be set according to the shape of the electrical components or the area where heat is concentrated, for example, it can be the same as the shape and size of the part that generates more heat.

[0107] The shape of the second heat exchanger 520 can be set according to the size and shape of the first end face. For example, the two can have the same area so that they can fit together fully to achieve heat exchange between the first end face and the second heat exchanger.

[0108] It is understandable that, since the first end face 111 is close to the electrical component 400, it is difficult to place a heating film at that location, resulting in poor preheating effect. In addition, since the first end face 111 is mostly composed of the large surface of the battery cell, heat is easily dissipated compared to other surfaces of the battery cell assembly, and the temperature drops rapidly. Therefore, the performance of the battery cell assembly at this location is difficult to improve using traditional heating film heating methods.

[0109] In addition, electrical components generate heat during operation. If the heat cannot be dissipated in time, the temperature will rise, which will seriously affect the performance of the electrical components.

[0110] In this embodiment, the heat generated during the operation of the electrical components can be transferred to the first end face of the battery cell assembly via a heat exchange component. This preheats the first end face of the battery cell assembly, improving the poor preheating effect at the first end face and enhancing the performance of the battery cells surrounding it. Simultaneously, this embodiment also utilizes the heat exchange component to dissipate heat from the electrical components, thereby improving their performance. Furthermore, since the heat from the electrical components is transferred to the first end face, no additional heat source is needed to heat the first end face, saving energy and reducing costs.

[0111] In this embodiment, by setting a first heat exchanger and a second heat exchanger, the first heat exchanger can be placed at any desired location (heat concentration area) of the electrical component, and the second heat exchanger can be placed on the first end face. The position of the heat exchange components is more flexible, and the volume of the heat exchange components can be reduced as much as possible, thereby improving space utilization.

[0112] According to some embodiments of this application, the first heat exchanger 510 includes a first heat exchanger body 511, a drive unit 516, and a temperature control switch 512. The first heat exchanger body 511 is thermally connected to the electrical component 400. The temperature control switch 512 is disposed between the first heat exchanger body 511 and the electrical component 400. The temperature control switch 512 is used to detect the temperature of the electrical component 400. The drive unit 516 is disposed in the first heat exchanger body 511. The drive unit 516 is used to drive the heat exchange medium to flow when the temperature of the electrical component reaches a preset opening temperature.

[0113] The first heat exchanger body 511 can be a structure with an internal cavity, which can be thermally connected to the electrical component 400, for example, by bonding.

[0114] The temperature control switch 512 can be a temperature-controlled switch, and it can be positioned between the first heat exchanger body 511 and the electrical component 400. The temperature control switch 512 can include a temperature sensor, thereby directly detecting the temperature of the electrical component 400 in contact with it.

[0115] The drive unit 516 can be connected to the temperature control switch 512, thereby controlling the operating state of the drive unit 516 through the temperature control switch 512. The drive unit 516 can be a component such as a pump body that can promote the flow of the heat exchange medium. It is understood that the figure shows one possible location of the drive unit 516; in other embodiments, the drive unit may also be located within the first heat exchanger body 511, or in other possible locations.

[0116] The preset start-up temperature can be the operating temperature of the drive unit 516, which can be set according to actual conditions. It can be understood that when the temperature control switch 512 detects that the temperature of the electrical component 400 is greater than or equal to the preset start-up temperature, the temperature control switch 512 can be turned on, thereby controlling the drive unit 516 to work. The drive unit 516 can cause the heat exchange medium in the heat exchange component to begin circulating, so that heat can flow between the first and second heat exchange components along with the heat exchange medium, realizing heat exchange between the electrical component 400 and the first end face.

[0117] In this embodiment, by setting a drive unit and a temperature control switch, the flow of the heat exchange medium can be controlled according to the temperature of the electrical components, thereby quickly achieving heat exchange. While preheating the first end face, the electrical components can also be cooled in time, improving the performance of the electrical components and battery cell assembly.

[0118] According to some embodiments of this application, the first heat exchanger body 511 has a plurality of first flow channels 513 for flowing heat exchange medium, and the first heat exchanger body 511 also has a first interface 514 and a second interface 515 respectively connected to the second heat exchanger 520, and the plurality of first flow channels 513 are connected between the first interface 514 and the second interface 515.

[0119] In this embodiment, the first heat exchanger body 511 may have multiple first flow channels 513 inside, and the first heat exchanger body 511 may have a first interface 514 and a second interface 515. The first interface 514 and the second interface 515 may be connection ports or connectors, etc., which can be used to communicate with the second heat exchanger 520. For example, one of the first interface 514 and the second interface 515 may be the outlet of the heat exchange medium flowing out of the first heat exchanger, and the other may be the inlet of the heat exchange medium flowing into the first heat exchanger.

[0120] Multiple first flow channels 513 are connected between the first interface 514 and the second interface 515. The multiple first flow channels 513 can be connected in parallel or in series between the first interface 514 and the second interface 515, or they can be partially connected in parallel or partially in series between the first interface 514 and the second interface 515. The specific configuration can be determined according to the actual situation.

[0121] By setting multiple first flow channels inside the first heat exchanger body, the contact between the first heat exchanger and the electrical components can be improved, and heat exchange can be achieved quickly.

[0122] According to some embodiments of this application, the first heat exchanger body 511 extends along the second direction Y, which is perpendicular to the first direction X. The first interface 514 and the second interface 515 are respectively located at both ends of the first heat exchanger body 511 along the second direction Y, and the first interface 514 and the second interface 515 are respectively connected to the second heat exchanger 520 through the pipeline 540.

[0123] In this embodiment, the first heat exchanger body 511 can extend along the second direction Y, and the first flow channel 513 inside it can also extend along the second direction. The first heat exchanger body 511 can be a rectangular box structure, and its larger surface area can be the main heat exchange surface, and it is attached to the electrical components.

[0124] The first interface 514 and the second interface 515 can be located at both ends of the first heat exchanger body 511 along the second direction Y. It can be understood that the first interface 514 and the second interface 515 can be located on the two end faces of the first heat exchanger body 511 along the second direction Y, respectively, or they can be located on the same side of the first heat exchanger body 511, and respectively at both ends of that side.

[0125] In this embodiment, the pipeline can be a flexible tube or a rigid tube, and there can be multiple of them. It can connect the first interface 514 and the second heat exchanger 520, and at the same time, it can also connect the second interface 515 and the second heat exchanger 520.

[0126] By setting the first interface and the second interface at both ends of the first heat exchanger body along the second direction, the inlet and outlet of the heat exchange medium can be separated by a greater distance, reducing heat loss and improving heat exchange efficiency.

[0127] According to some embodiments of this application, the drive unit 516 is also used to stop the flow of the heat exchange medium when the temperature of the electrical component reaches a preset shut-off temperature.

[0128] In this embodiment, when the temperature control switch 512 detects that the temperature of the electrical component 400 has reached the preset shut-off temperature, it stops driving the flow of the heat exchange medium.

[0129] The preset shut-off temperature can be set according to actual conditions, such as the temperature at which the electrical component can operate normally. The preset shut-off temperature can be lower than the preset on temperature. Understandably, when the electrical component is operating, its temperature rises. When the temperature control switch 512 detects that the temperature of the electrical component 400 is greater than or equal to the preset on temperature, the temperature control switch 512 can open, thereby controlling the drive unit 516 to operate. The drive unit 516 can cause the heat exchange medium in the heat exchange components to begin circulating, allowing heat to flow between the first and second heat exchange components, achieving heat exchange between the electrical component 400 and the first end face. As heat exchange proceeds, the temperature of the electrical component can decrease. When the temperature control switch detects that the temperature of the electrical component has reached the preset shut-off temperature, it stops driving the flow of the heat exchange medium.

[0130] In this embodiment, when the temperature of the electrical component drops to the preset shut-off temperature, the flow of the heat exchange medium in the heat exchange component can be stopped, so that the electrical component can always operate at a lower temperature, which improves its performance and saves resources and reduces waste.

[0131] According to some embodiments of this application, the electrical component 400 includes a housing 410 and an electrical component 420 disposed in the housing 410. A first heat exchanger 510 is disposed outside the housing 410 and is attached to the bottom of the housing 410.

[0132] In this embodiment, the electrical component 400 may include a housing 410 and electrical components 420 disposed in the housing 410. It is understood that there may be multiple types of electrical components 420. The electrical component 400 can concentrate the electrical components 420 in the housing 410, which is beneficial to the integration of the battery device and can save space and improve the utilization rate of space.

[0133] The first heat exchanger 510 can be fitted to the outside of the box 410 and located between the bottom of the box 410 and the housing. That is, the first heat exchanger can be installed outside the box of the electrical component 400 to achieve heat exchange.

[0134] It is understandable that the integrated electrical components 400 are concentrated inside the housing 410, resulting in poor heat dissipation. Furthermore, the bottom of the housing 410 is usually installed at the bottom of the enclosure, so the bottom of the housing 410 has poorer heat dissipation compared to other surfaces.

[0135] In this embodiment, by setting a first heat exchanger on the bottom outside of the box, heat can be exchanged in areas where the electrical components have poor heat dissipation, thereby further improving the cooling effect on the electrical components.

[0136] According to some embodiments of this application, electrical component 420 includes high-voltage component 421, which is disposed at the bottom of housing 410.

[0137] The high-voltage component 421 can be a high-voltage bar or other structure that conducts high-voltage electricity. It is understood that the current on the high-voltage component 421 is large and the heat generated is large. When it is placed in the box, it is easy to generate a high temperature rise, which will affect the normal operation of the electrical components.

[0138] In this embodiment, the high-pressure component is placed at the bottom of the box, so that the first heat exchanger can be closer to the high-pressure component that generates more heat, shortening the heat exchange path and improving the heat exchange efficiency between the electrical components and the first heat exchanger.

[0139] According to some embodiments of this application, the electrical component 400 includes a high-voltage box, which is provided with at least one of a CSC control module 422, a BMU control module 423, a current relay 424, and a current fuse.

[0140] In this embodiment, the electrical component 400 can be a high-voltage box structure, which can house various electrical components, such as at least one of the following: a CSC (Cell Supervising Circuit) control module 422, a BMU (Battery Management Unit) control module 423, a current relay 424, and a current fuse. The high-voltage component 421 can also be housed within the high-voltage box.

[0141] The CSC control module 422 can be used to monitor the voltage and temperature of individual battery cells, while the BMU control module 423 can monitor and manage the total voltage, total current, remaining capacity, and health status of the battery pack. The current relay 424 can control the on / off state of the current, and the current fuse can provide overcurrent protection. These electrical components all generate heat during operation.

[0142] In this embodiment, the high-voltage box can integrate the electrical architecture of the battery device, such as the CSC control module, BMU control module, current relay, and current fuse, thus achieving the requirements of miniaturization and lightweighting.

[0143] Figure 10 for Figure 6 Schematic diagram of the structure of the second heat exchanger; Figure 11 for Figure 10 The front view; Figure 12 for Figure 11 Sectional view at point BB. Please refer to... Figures 10 to 12 According to some embodiments of this application, the second heat exchanger 520 extends along a second direction Y perpendicular to the first direction X, and the second heat exchanger 520 is attached to the first end face 111 of the battery cell assembly.

[0144] In this embodiment, the second heat exchanger 520 can extend along the second direction Y. It can be understood that the dimension of the second heat exchanger 520 extending along the second direction can be the same as the dimension of the first end face 111, thereby increasing the heat exchange area between the second heat exchanger and the first end face.

[0145] The second heat exchanger 520 can be a rectangular box structure, and the interior can be used to circulate the heat exchange medium. The larger surface area of ​​the second heat exchanger 520 (the surface perpendicular to the first direction) can be attached to the first end face 111. The thickness of the second heat exchanger 520 (the dimension along the first direction) can be smaller, so as to minimize the volume of the heat exchange component and increase the heat exchange area between it and the second heat exchanger.

[0146] In addition, the second heat exchanger 520 can be directly attached to the first end face 111 of the battery cell assembly, thereby achieving direct contact heat exchange and further improving heat exchange efficiency.

[0147] In this embodiment, extending the second heat exchanger along the second direction can increase the heat exchange area between the second heat exchanger and the first end face, thereby further improving the heat exchange efficiency.

[0148] According to some embodiments of this application, the second heat exchanger 520 has a plurality of second flow channels 521 for flowing heat exchange medium, and the second heat exchanger 520 also has a third interface 522 and a fourth interface 523 respectively connected to the first heat exchanger 510, and the plurality of second flow channels 521 are connected between the third interface 522 and the fourth interface 523.

[0149] In this embodiment, the second heat exchanger 520 may have multiple second flow channels 521 inside, and the second flow channels may extend along a second direction. The second heat exchanger 520 may have a third interface 522 and a fourth interface 523, which may be connection ports or connectors, etc., and may be used to communicate with the first heat exchanger 510. For example, one of the third interface 522 and the fourth interface 523 may be the outlet for the heat exchange medium flowing out of the second heat exchanger, and the other may be the inlet for the heat exchange medium flowing into the second heat exchanger.

[0150] Multiple second flow channels are connected between the third interface 522 and the fourth interface 523. Multiple second flow channels 521 can be connected in parallel or in series between the third interface 522 and the fourth interface 523, or they can be partially connected in parallel or partially in series between the third interface 522 and the fourth interface 523. The specific configuration can be determined according to the actual situation.

[0151] In some embodiments, the first interface 514 can be connected to the third interface 522, and the second interface 515 can be connected to the fourth interface 523, thereby realizing the connection between the first heat exchanger and the second heat exchanger.

[0152] By setting multiple second flow channels inside the second heat exchanger, the contact between the second heat exchanger and the first end face can be improved, and heat exchange can be achieved quickly.

[0153] According to some embodiments of this application, the third interface 522 and the fourth interface 523 are connected to the side of the second heat exchanger 520 away from the first end face 111, and the third interface 522 and the fourth interface 523 are respectively connected to the first heat exchanger 510 through pipelines.

[0154] In this embodiment, the second heat exchanger 520 may have two relatively large surfaces, one of which can be in contact with the first end face for heat exchange, and the other surface may be provided with a third interface 522 and a fourth interface 523. In some embodiments, the third interface 522 and the fourth interface 523 may be located at both ends of the surface along the second direction, which can make the inlet and outlet of the heat exchange medium more far apart, reduce heat loss, and improve heat exchange efficiency.

[0155] The first interface 514 can be connected to the third interface 522 through a pipeline, and the second interface 515 can be connected to the fourth interface 523 through a pipeline, thereby realizing the connection between the first heat exchanger and the second heat exchanger.

[0156] In some embodiments, the piping can be a flexible hose that can be bent at will, thereby allowing the piping to be arranged reasonably according to the internal space of the battery device and improving space utilization.

[0157] In this embodiment, by setting the third and fourth interfaces at positions away from the first end face of the second heat exchanger, it is easier for the second heat exchanger to fit against the first end face, thereby improving the heat exchange effect.

[0158] According to some embodiments of this application, the first heat exchanger 510 and / or the second heat exchanger 520 are made of metallic material.

[0159] In some embodiments, the first heat exchanger 510 may be made of a metallic material, such as iron or aluminum, thereby improving the heat exchange efficiency between the first heat exchanger and the electrical components.

[0160] In some embodiments, the second heat exchanger 520 may be made of a metallic material, such as iron or aluminum, thereby improving the heat exchange efficiency between the first heat exchanger and the first end face.

[0161] It is understandable that metallic materials have better thermal conductivity. By making at least one of the first and second heat exchange components a metallic material, the heat exchange effect between the heat exchange components and the first end face or electrical components can be further improved.

[0162] Figure 13 This is another structural schematic diagram of the electrical components and heat exchange components provided in an embodiment of this application. Please refer to... Figure 13 According to some embodiments of this application, the heat exchange component 500 may further include a third heat exchange component 530, which is thermally connected to the second end face 112 of the battery cell assembly 10 away from the electrical component 400. The third heat exchange component 530 is also connected to the first heat exchange component 510 so that the heat exchange medium can flow between the third heat exchange component 530 and the first heat exchange component 510.

[0163] The battery cell assembly 10 may have a first end face 111 and a second end face 112 at its two ends along the first direction, and the first end face 111 may be thermally connected to the second heat exchanger 520.

[0164] In addition to the first heat exchanger 510 and the second heat exchanger 520, the heat exchanger 500 may also include a third heat exchanger 530, which may be thermally connected to the second end face 112, for example, by fitting.

[0165] It is understandable that the structure and function of the third heat exchanger 530 can be referenced from the second heat exchanger 520. Specifically, it can be referenced from the second heat exchanger. The difference between the two is that one is thermally connected to the first end face, while the other can be thermally connected to the second end face.

[0166] In this embodiment, the third heat exchanger 530 may also have an internal cavity for the flow of the heat exchange medium. The third heat exchanger 530 can be connected to the first heat exchanger 510 via a pipeline. The heat exchange medium can flow between the first heat exchanger 510 and the third heat exchanger 530.

[0167] It is understood that in this embodiment, the first heat exchanger 510 may have two first interfaces and two second interfaces. One first interface and one second interface may be connected to the second heat exchanger, and the other first interface and the other second interface may be connected to the third heat exchanger. This allows the heat exchange medium in the first heat exchanger to flow into the second heat exchanger and the third heat exchanger through the first interface, respectively. Then, the heat exchange medium flowing out of the second heat exchanger and the third heat exchanger may enter the first heat exchanger through the second interface to achieve heat exchange, thereby using the heat generated by the electrical components to preheat the first end face and the second end face of the battery cell assembly.

[0168] It is understandable that, since the first end face and the second end face are opposite each other, and the second end face is mostly composed of the large surface of the battery cell, heat is easily dissipated and the temperature drops quickly compared to other surfaces of the battery cell assembly. In this embodiment, by setting a third heat exchanger on the second end face, the heat generated by the electrical components during operation can be transferred to the second end face of the battery cell assembly through the third heat exchanger and the first heat exchanger, thereby preheating the second end face of the battery cell assembly. This improves the problem of poor preheating effect of the battery cell assembly at the second end face and enhances the performance of the battery cells around the second end face.

[0169] Figure 14 This is a schematic diagram of the heating element and battery cell assembly provided in an embodiment of this application. Please refer to... Figure 14According to some embodiments of this application, the housing 20 is further provided with a heating element 600 for preheating the battery cell assembly 10. The heating element 600 includes a first heating section 610 and a second heating section 620. The battery cell assembly 10 includes a first region 15 and a second region 16. The first region 15 is the region where the end of the battery cell assembly away from the first end face 111 is located, and the second region 16 is the remaining region of the battery cell assembly 10 excluding the first region 15. The first heating section 610 is used to heat the battery cell 11 in the first region 15, and the second heating section 620 is used to heat the battery cell 11 in the second region 16. The heating power of the first heating section 610 is higher than that of the second heating section 620.

[0170] The battery cell assembly 10 can be divided into a first region 15 and a second region 16. The first region 15 can be located in the region where the end of the battery cell assembly 10 away from the first end face 111 is located. It can be understood that the second end face 112 can be located in this region.

[0171] The second region 16 comprises the remaining regions excluding the first region 15. The heating element 600 can be a structure capable of heating, such as a heating film or other heat-generating component.

[0172] The heating element 600 may include a first heating section 610 corresponding to the first region 15 and a second heating section 620 corresponding to the second region 16. The first heating section 610 can heat the first region 15, for example, the first heating section may be located at the bottom of the first region. The second heating section 620 can heat the second region 16, for example, the second heating section may be located at the bottom of the second region.

[0173] In this embodiment, the heating power of the first heating section 610 can be greater than the heating power of the second heating section 620, that is, in the same amount of time, the heat generated by the first heating section 610 is greater than the heat generated by the second heating section 620.

[0174] It is understandable that, compared to other surfaces of the battery cell assembly, the two ends along the first direction lose heat more easily and experience a faster temperature drop. The first heating section can preheat the first area, and the second heating section can preheat the second area. Furthermore, because the first heating section has high heating power, it can preheat the end of the battery cell assembly away from the electrical components, and this high preheating power helps mitigate the problem of rapid temperature drop at that end leading to a decrease in battery cell performance.

[0175] In this embodiment, the first heating section can be selected to preheat the second end face. In other embodiments, the second end face can also be preheated by the third heat exchanger. In other embodiments, the area where the second end face is located can also be heated by both the first heating section and the third heat exchanger.

[0176] According to some embodiments of this application, the battery device 100 further includes a cooling component disposed between the battery cell assembly and the housing, the cooling component being used to absorb heat from the battery cell assembly.

[0177] The cooling component can be a structure such as a cold plate, which can be installed in the housing 20. The cooling component can be connected to the battery cell assembly to absorb the heat generated by the battery cell assembly during operation. The cooling component can have various shapes, such as a serpentine cold plate, a harmonica tube cold plate, etc.

[0178] It is understandable that cooling media can also circulate in cooling components. Cooling components and heat exchange components are independent heat exchange structures, and their structures and media are not interchangeable. Heat exchange components can be used during the preheating stage of the battery device, heating areas with poor preheating effects to improve preheating efficiency and mitigate the performance degradation of individual battery cells in low-temperature environments. After preheating, during normal operation, cooling components can dissipate the heat generated by the battery device during operation, mitigating the performance degradation caused by excessively high individual battery cell temperatures.

[0179] In this embodiment, by providing a cooling component, the heat generated by the battery device during operation can be dissipated, thereby improving the phenomenon of performance degradation caused by excessively high temperature of individual battery cells.

[0180] This application provides an electrical device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to provide electrical energy.

[0181] Electrical devices include vehicles (such as cars, electric vehicles, ships, spacecraft, etc.), display devices (such as mobile phones, tablets, laptops, etc.), electric toys, power tools, etc.

[0182] It is understood that the electrical device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0183] This application provides an energy storage device, which includes the battery device 100 in the above embodiments, and the battery device 100 is used to store electrical energy.

[0184] Energy storage devices can include, but are not limited to, centralized energy storage devices (such as containerized energy storage devices), distributed energy storage devices, mobile energy storage devices, wearable energy storage devices, and so on.

[0185] It is understood that the energy storage device provided in this application, by using any of the aforementioned battery devices 100, has all the beneficial effects of the aforementioned battery devices 100, which will not be elaborated here.

[0186] In some embodiments, please refer to Figures 1 to 9 The battery device 100 includes: a housing 20, a battery cell assembly 10, an electrical component 400, and a heat exchange component 500; the battery cell assembly 10 includes at least one battery cell 11, and the battery cell assembly 10 is housed in the housing 20; the electrical component 400 is housed in the housing 20, and the electrical component 400 is located at one end of the battery cell assembly 10 along a first direction X; the heat exchange component 500 includes a first heat exchange component 510 and a second heat exchange component 520, the first heat exchange component 510 is thermally connected to the electrical component 400, the second heat exchange component 520 is thermally connected to a first end face 111 of the battery cell assembly 10 facing the electrical component 400, and the first heat exchange component 510 and the second heat exchange component 520 can be connected by a pipeline so that the heat exchange medium can flow between the first heat exchange component 510 and the second heat exchange component 520 to realize heat exchange between the heat exchange component 500 and the electrical component 400.

[0187] Among them, electrical component 400 may include a high-voltage box, which can integrate electrical architecture modules such as CSC control module, BMU control module, current relay, and current fuse, thus achieving the requirements of miniaturization and lightweighting.

[0188] Because electrical components are integrated into the high-voltage box, the heat generated during operation accumulates and is not easily dissipated, causing the internal temperature of the high-voltage box to rise. By setting a first heat exchanger with a temperature control switch, when the temperature reaches the preset opening temperature, the driving part in the first heat exchanger can push the internal heat exchange medium to circulate, thereby allowing the heat exchange medium to circulate between the first and second heat exchangers, thus providing heat dissipation for the high-voltage box.

[0189] In addition, the second heat exchanger can be set at the first end face 111 that needs to be preheated, so that the heat of the high voltage box can be used to heat the battery cells at the first end face, maintain the temperature of the battery cells, and improve the problem of excessive temperature drop.

[0190] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: Box; A battery cell assembly, including at least one battery cell, is housed within the housing; Electrical components are housed within the enclosure, and the electrical components are located at one end of the battery cell assembly along a first direction; A heat exchange component is thermally connected between the first end face of the battery cell assembly facing the electrical component and the electrical component. The heat exchange component includes a first heat exchange element and a second heat exchange element. The first heat exchange element is thermally connected to the electrical component, and the second heat exchange element is thermally connected to the first end face of the battery cell assembly. The first heat exchange element and the second heat exchange element are connected by a pipeline so that the heat exchange medium can flow between the first heat exchange element and the second heat exchange element, thereby realizing heat exchange between the heat exchange component and the electrical component. The second heat exchange element extends along a second direction perpendicular to the first direction and is fitted to the first end face of the battery cell assembly.

2. The battery device according to claim 1, characterized in that, The first heat exchanger includes a first heat exchanger body, a drive unit, and a temperature control switch, and the first heat exchanger body is thermally connected to the electrical component; The temperature control switch is disposed between the first heat exchanger body and the electrical component. The temperature control switch is used to detect the temperature of the electrical component. The driving unit is disposed on the first heat exchanger body. The driving unit is used to drive the heat exchange medium to flow when the temperature of the electrical component reaches the preset opening temperature.

3. The battery device according to claim 2, characterized in that, The first heat exchanger body has multiple first flow channels for the flow of the heat exchange medium, and the first heat exchanger body also has a first interface and a second interface respectively connected to the second heat exchanger, and the multiple first flow channels are connected between the first interface and the second interface.

4. The battery device according to claim 3, characterized in that, The first heat exchanger body extends along a second direction perpendicular to the first direction. The first interface and the second interface are located at the two ends of the first heat exchanger body along the second direction, and the first interface and the second interface are respectively connected to the second heat exchanger through the pipeline.

5. The battery device according to claim 2, characterized in that, The drive unit is also used to stop driving the flow of the heat exchange medium when the temperature of the electrical component reaches a preset shut-off temperature.

6. The battery device according to any one of claims 1-5, characterized in that, The electrical components include a housing and electrical components disposed within the housing. The first heat exchanger is disposed outside the housing and is attached to the bottom of the housing.

7. The battery device according to claim 6, characterized in that, The electrical components include high-voltage components, which are located at the bottom of the housing.

8. The battery device according to any one of claims 1-5, characterized in that, The electrical components include a high-voltage box, which contains at least one of a CSC control module, a BMU control module, a current relay, and a current fuse.

9. The battery device according to claim 1, characterized in that, The second heat exchanger has multiple second flow channels for the flow of the heat exchange medium, and the second heat exchanger also has a third interface and a fourth interface respectively connected to the first heat exchanger, and the multiple second flow channels are connected between the third interface and the fourth interface.

10. The battery device according to claim 9, characterized in that, The third interface and the fourth interface are connected to the side of the second heat exchanger that is away from the first end face, and the third interface and the fourth interface are respectively connected to the first heat exchanger through the pipeline.

11. The battery device according to any one of claims 1-5, characterized in that, The first heat exchanger and / or the second heat exchanger are made of metallic material.

12. The battery device according to any one of claims 1-5, characterized in that, The heat exchange component further includes a third heat exchange element, which is thermally connected to the second end face of the battery cell assembly away from the electrical component. The third heat exchange element is also connected to the first heat exchange element so that the heat exchange medium can flow between the third heat exchange element and the first heat exchange element.

13. The battery device according to any one of claims 1-5, characterized in that, The housing is also equipped with a heating element for preheating the battery cell assembly, the heating element comprising a first heating section and a second heating section; The battery cell assembly includes a first region and a second region. The first region is the region where the end of the battery cell assembly facing away from the first end face is located, and the second region is the remaining regions of the battery cell assembly other than the first region. The first heating section is used to heat the battery cells in the first region, and the second heating section is used to heat the battery cells in the second region, wherein the heating power of the first heating section is higher than the heating power of the second heating section.

14. The battery device according to any one of claims 1-5, characterized in that, Also includes: A cooling component is disposed between the battery cell assembly and the housing, and the cooling component is used to absorb the heat of the battery cell assembly.

15. An electrical appliance, characterized in that, The electrical device includes a battery device as described in any one of claims 1-14, the battery device being used to provide electrical energy.

16. An energy storage device, characterized in that, The energy storage device includes a battery device as described in any one of claims 1-14, the battery device being used to store electrical energy.

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