Battery device and electric device

Abstract

The utility model is applicable to the technical field of batteries, and provides a battery device and a power utilization device, the battery device comprises: a box assembly, which comprises a first beam body in which a flow channel for circulation of a heat exchange medium is arranged; the battery monomer assemblies comprise a plurality of battery monomers which are arranged in sequence, and the first beam body abuts against at least one battery monomer assembly; the heat management part comprises a heat exchange tube and a current collector, the heat exchange tube is arranged between two adjacent battery monomer assemblies, and the heat exchange tube is used for exchanging heat with the battery monomer assemblies; the flow channels and the heat exchange pipes communicate with the current collector, the current collector comprises a connecting pipe and a plurality of installation parts, and the heat exchange pipes and the first beam bodies are connected with the corresponding installation parts in a sealed mode. According to the battery device provided by the embodiment of the invention, the first beam body can exchange heat with the battery monomer assembly, so that the weight and the cost of the heat management component are reduced, and the light weight of the battery device and the power utilization device is favorably realized.

Description

Technical Field

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

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

[0003] Temperature has a significant impact on battery performance, so conventional batteries are equipped with additional thermal management components to cool the battery or heat it up in low-temperature environments to bring it to its normal operating temperature range. However, thermal management components increase the weight of the battery, which is detrimental to further weight reduction in electrical devices such as vehicles. Utility Model Content

[0004] In view of this, embodiments of this application provide a battery device and an electrical device that enable the battery device to have a lighter structure, which is beneficial for achieving lightweighting of the battery device and the electrical device.

[0005] An embodiment of the first aspect of this application provides a battery device, comprising: a housing assembly enclosing a receiving space, the housing assembly including a first beam having a flow channel within the first beam for the flow of a heat exchange medium; a plurality of battery cell assemblies disposed within the receiving space, each battery cell assembly comprising a plurality of sequentially arranged battery cells, the first beam abutting against at least one battery cell assembly; a thermal management component disposed within the receiving space, the thermal management component including a heat exchange tube and a current collector, the heat exchange tube being disposed between two adjacent battery cell assemblies and used for heat exchange with the battery cell assemblies; the flow channel and the heat exchange tube being connected to the current collector, the current collector including a connecting pipe and a plurality of mounting portions, the heat exchange tube and the first beam being respectively sealed to corresponding mounting portions.

[0006] In the battery device provided in this application embodiment, the heat exchange tubes can exchange heat with the individual battery cells. Simultaneously, a flow channel is provided within the first beam body, allowing the heat exchange medium to circulate within it. Thus, the first beam body can also exchange heat with the battery cells it opposes. The first beam body is part of the housing assembly. By utilizing the first beam body to exchange heat with at least one battery cell, the number of heat exchange tubes can be reduced, saving space occupied by the thermal management components and lowering their weight and cost. This results in a lighter battery device structure, facilitating weight reduction for both the battery device and the electrical devices using it. Furthermore, the first beam body, being a beam within the housing assembly, not only possesses high strength and rigidity but also a large surface area and potential thermal conductivity, enabling efficient heat exchange and improving thermal management efficiency.

[0007] In some embodiments, the battery cell includes a first wall, which is the sidewall with the largest area in the battery cell, and the heat exchange tube and the first beam are both attached to the first wall of the battery cell.

[0008] By adopting the above technical solution, both the heat exchange tube and the first beam can perform heat exchange on a large surface of the battery cell, resulting in good thermal management effect and high efficiency.

[0009] In some embodiments, multiple battery cells in a battery cell assembly are arranged sequentially along a first direction, and multiple battery cell assemblies are arranged sequentially along a second direction. The first direction is the length or width direction of the battery device, and the second direction intersects with the first direction. The heat exchange tube and the first beam both extend along the first direction, and the multiple battery cell assemblies are all located on the same side of the first beam along the second direction.

[0010] By adopting the above technical solution, the battery cell assembly can be arranged flexibly. The first beam can perform thermal management on the battery cell assembly located at the end, saving the heat exchange tube at the end and reducing the weight and cost of the thermal management components.

[0011] In some embodiments, the housing assembly includes a plurality of side beams that enclose a receiving space, and at least one side beam is a first beam.

[0012] By adopting the above technical solution, the frame beam can be attached to multiple battery cells at the end. By setting flow channels inside the frame beam, efficient thermal management can be achieved, saving the heat exchange tubes at the end.

[0013] In some embodiments, the first beam is provided with an inlet and an outlet, and the thermal management component includes two collectors spaced apart along a first direction. Both collectors are connected to the first beam, one collector is connected to the inlet, and the other collector is connected to the outlet.

[0014] By adopting the above technical solution, the current collector can be directly connected to the inlet or outlet, reducing the number of inlet and outlet pipes between the current collector and the housing, thus saving assembly space inside the battery device.

[0015] In some embodiments, the first beam includes an integrally formed main body and a heat exchange part, the heat exchange part is located on the side of the main body facing the battery cell assembly, the flow channel is located in the heat exchange part, the heat exchange part extends along the battery cell assembly and is positioned directly opposite the battery cell assembly; the two ends of the main body are respectively fixedly connected to two side frame beams.

[0016] By adopting the above technical solution, the main body of the first beam is used to connect the adjacent frame beams, and the heat exchange part is used to set the flow channel. The structure of the first beam is ingenious and can simultaneously meet the structural strength requirements and heat exchange requirements of the battery device.

[0017] In some embodiments, the two ends of the main body extend beyond the heat exchange section along the first direction, and the inlet and outlet are both located on the main body.

[0018] By adopting the above technical solution, the main body of the first beam can be conveniently equipped with water inlet and outlet, saving connecting pipes and improving the space utilization rate inside the battery device.

[0019] In some embodiments, the housing assembly includes a housing and an expansion beam, the housing enclosing a receiving space, the expansion beam being located within the receiving space, the expansion beam being used to resist the expansion force of the battery cell assembly, and the first beam being the expansion beam.

[0020] By adopting the above technical solution, the expansion beam, as the first beam, can exchange heat with the battery cell assembly to perform thermal management of the battery cell assembly, saving the heat exchange tubes required for the end battery cell assembly and reducing the number of heat exchange tubes.

[0021] In some embodiments, the flow channel is formed inside the first beam by extrusion molding.

[0022] By adopting the above technical solution, it is possible to manufacture flow channels with preset lengths and complex cross-sections to meet the requirements of efficient heat exchange; the production efficiency of the first beam is high, the manufacturing cost is low, and the manufacturing precision of the flow channel is high.

[0023] In some embodiments, the flow channel includes at least one of a straight flow channel and a curved flow channel.

[0024] The shape of the flow channel provided in this application embodiment can be flexibly set, so that the flow channel has a large heat exchange area and meets the requirements of efficient heat exchange.

[0025] An embodiment of the second aspect of this application provides an electrical device, including a battery device as described in the first aspect, the battery device being used to provide electrical energy.

[0026] The battery device provided in this application embodiment is lighter and more convenient, which is conducive to the lightweighting of electrical devices.

[0027] 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

[0028] To more clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments or conventional technology will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0030] Figure 2 This is a schematic diagram of the structure of a battery device provided in an embodiment of this application;

[0031] Figure 3 This is a schematic diagram of the structure of a battery cell provided in an embodiment of this application;

[0032] Figure 4 This is a perspective view of a battery device provided in an embodiment of this application;

[0033] Figure 5 yes Figure 4 Top view of the battery device shown;

[0034] Figure 6 This is a schematic diagram of the structure of a thermal management component provided in an embodiment of this application;

[0035] Figure 7 This is a schematic diagram of the structure of the first beam provided in an embodiment of this application;

[0036] Figure 8 yes Figure 4 An exploded three-dimensional view of the battery device shown.

[0037] Figure 9 yes Figure 8 Enlarged view of part A in the middle;

[0038] Figure 10 This is a perspective view of a battery device provided in another embodiment of this application;

[0039] Figure 11 yes Figure 10 Top view of the battery device shown.

[0040] The markings in the diagram mean:

[0041] 1000, Vehicle; 100, Battery unit; 200, Controller; 300, Motor;

[0042] 10. Container assembly; 101. Retaining space; 102. Inlet; 103. Outlet; 11. Container; 11a. First part; 11b. Second part;

[0043] 111. First beam; 1111. Flow channel; 1112. Main body; 1113. Heat exchange section;

[0044] 112. Second beam; 113. Third beam; 114. Fourth beam; 12. Expansion beam;

[0045] 20. Battery cell assembly; 21. Battery cell; 211. Housing; 2111. First wall; 212. End cap; 213. Electrode assembly; 214. Electrode terminal; 215. Pressure relief mechanism;

[0046] 30. Thermal management components; 31. Current collector; 311. Connecting pipe; 312. Mounting part; 32. Heat exchanger tube; 33. Water inlet pipe; 34. Water outlet pipe. Detailed Implementation

[0047] 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.

[0048] 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.

[0049] 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.

[0050] 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.

[0051] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0052] 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).

[0053] 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.

[0054] In this embodiment of the application, the battery cell can be a secondary battery, which refers to a battery cell that can be recharged to activate the active materials and continue to be used after the battery cell has been discharged.

[0055] The battery cell can be a lithium-ion battery, sodium-ion battery, sodium-lithium-ion battery, lithium metal battery, sodium metal battery, lithium-sulfur battery, magnesium-ion battery, nickel-metal hydride battery, nickel-cadmium battery, lead-acid battery, etc., and the embodiments of this application are not limited to this.

[0056] The battery apparatus mentioned in the embodiments of this application may include one or more battery cell assemblies for providing voltage and capacity. A battery cell assembly may include multiple battery cells connected in series, parallel, or mixed connections via a busbar.

[0057] In some embodiments, a battery cell assembly is typically formed by arranging multiple battery cells.

[0058] As an example, a battery cell assembly can be a battery module, which is formed by arranging and fixing multiple battery cells together to form an independent module. As another example, a battery module can be formed by bundling multiple battery cells together with cable ties.

[0059] In some embodiments, the battery device may be a battery pack, which includes a housing and one or more individual battery cells housed within the housing.

[0060] As an example, the battery cell assembly can be a battery module, which can be housed in a housing by fixing the battery module in the housing.

[0061] As an example, battery cell assemblies can also be housed in a housing by directly fixing multiple battery cells to the housing.

[0062] Currently, judging from market trends, the application of power batteries is becoming increasingly widespread. Power batteries are not only used in energy storage systems such as hydropower, thermal power, wind power, and solar power plants, but also widely applied in electric vehicles such as electric bicycles, electric motorcycles, and electric cars, as well as other fields. With the continuous expansion of the application areas of power batteries, the market demand is also constantly increasing.

[0063] A battery typically consists of individual battery cells and a casing. The battery cells are placed inside the casing, which provides space for them and offers some protection. The individual battery cells are the components where the actual electrochemical reactions occur.

[0064] When an electrochemical reaction occurs inside a battery cell, heat is generated. As the battery is cycled, the cells continuously generate heat, causing the internal temperature to gradually rise. When the temperature exceeds the allowable range, it will affect the battery's performance and lifespan. Therefore, thermal management components are typically installed inside the battery to cool it down or heat it up in low-temperature environments to bring it back to its normal operating temperature range.

[0065] The battery casing typically contains multiple rows of battery cells. In some batteries, the thermal management components include multiple heat exchange tubes, each of which is used to exchange heat with one or two adjacent rows of battery cells. The heat exchange tubes are expensive to manufacture and increase the weight of the battery, which is not conducive to achieving lightweighting of the battery and the electrical device.

[0066] Based on the above considerations, one or more embodiments of this application provide a battery device, including a housing assembly, a battery cell assembly, and a thermal management component. The housing assembly encloses a receiving space and includes a first beam with a flow channel for the flow of a heat exchange medium. The battery cell assembly is disposed within the receiving space and includes a plurality of battery cells arranged in sequence. The thermal management component is disposed within the receiving space and includes a heat exchange tube for exchanging heat with the battery cell assembly.

[0067] In the battery device provided in this application embodiment, the heat exchange tube can exchange heat with the battery cell assembly. At the same time, the first beam body is provided with a flow channel, and the heat exchange medium can flow in the flow channel. Thus, the first beam body can also exchange heat with the battery cell assembly that it is opposed to. Since the first beam body is part of the housing assembly, by using the first beam body to exchange heat with at least one battery cell assembly, the number of heat exchange tubes can be saved, the weight and cost of the thermal management components can be reduced, and it is beneficial to achieve lightweighting of the battery device and the electrical device using the battery device.

[0068] This application provides an electrical device that uses a battery as a power source. The electrical device can be, but is not limited to, mobile phones, tablets, laptops, electric toys, power tools, electric vehicles, electric cars, ships, spacecraft, etc. Electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric ship toys, and electric airplane toys, etc. Spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc. For ease of explanation, the following embodiments use a vehicle as an example of an electrical device according to one embodiment of this application.

[0069] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in one embodiment 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.

[0070] 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.

[0071] refer to Figure 2 and Figure 3 , Figure 2 This is a schematic diagram of the structure of a battery device 100 provided in one embodiment of this application. Figure 3This is a schematic diagram of the structure of a battery cell 21 provided in one embodiment of this application. The battery apparatus mentioned in the embodiments of this application may include multiple battery cell assemblies 20 for providing voltage and capacity. A battery cell assembly may include multiple battery cells 21, which are connected in series, parallel, or mixed connections through a busbar.

[0072] In some embodiments, the battery cell assembly 20 is typically formed by arranging multiple battery cells 21; as an example, the battery cell assembly 20 can be a battery module, which is formed by arranging and fixing multiple battery cells 21 into an independent module. As an example, a battery module can be formed by bundling multiple battery cells 21 together with cable ties.

[0073] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed in the housing 11.

[0074] As an example, the battery cell assembly 20 can be a battery module, which can be housed in the housing by fixing the battery module in the housing.

[0075] As an example, the battery cell assembly 20 can also be housed in the housing 11 by directly fixing multiple battery cells 21 to the housing 11.

[0076] As an example, the housing 11 may include a first part 11a and a second part 11b. The first part 11a and the second part 11b are fastened together to form a closed receiving space inside the housing 11 to house the battery cell assembly 20. Here, "closed" means covered or closed, and can be either sealed or unsealed.

[0077] As an example, the housing 11 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 11 forms a closed receiving space to accommodate the battery cell assembly 20.

[0078] As an example, the housing 11 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the housing 11 can be at least part of the floor of the vehicle 1000, or the frame of the housing 11 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0079] Please refer to Figure 3The battery cell 21 refers to the smallest unit that makes up the battery device 100. The battery cell 21 includes a housing 211, an end cap 212, an electrode assembly 213 and an electrolyte. The electrode assembly 213 and the electrolyte are both contained within the housing 211.

[0080] End cap 212 refers to a component that covers the opening of housing 211 to isolate the internal environment of battery cell 21 from the external environment. The shape of end cap 212 can be adapted to the shape of housing 211 to fit the housing 211. Optionally, end cap 212 can be made of a material with a certain hardness and strength (such as aluminum alloy), so that end cap 212 is not easily deformed when subjected to compression and impact, so that battery cell 21 can have higher structural strength and improved safety performance. Functional components such as electrode terminals 214 and explosion-proof valves can be provided on end cap 212. Electrode terminals 214 can be used to electrically connect with electrode assembly 213 for outputting or inputting electrical energy of battery cell 21. In some embodiments, end cap 212 can also be provided with a pressure relief mechanism 215 for releasing internal pressure when the internal pressure or temperature of battery cell 21 reaches a threshold. The material of end cap 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., and this application embodiment does not impose special limitations on this. In some embodiments, an insulating element may also be provided on the inner side of the end cap 212 to reduce the risk of short circuit. For example, the insulating element may be made of plastic, rubber, etc.

[0081] The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21. This internal environment can accommodate the electrode assembly 213, electrolyte, and other components. The housing 211 and the end cap 212 can be independent components. An opening can be provided on the housing 211, and the end cap 212 can be used to close the opening to form the internal environment of the battery cell 21. Alternatively, the end cap 212 and the housing 211 can be integrated. Specifically, the end cap 212 and the housing 211 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 211, the end cap 212 closes the housing 211. The housing 211 can have various shapes and sizes, such as cuboid, cylindrical, or hexagonal prism. Specifically, the shape of the housing 211 can be determined according to the specific shape and size of the electrode assembly 213. The shell 211 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc. This application embodiment does not impose any special restrictions on this.

[0082] Electrode assembly 213 is the component in the battery cell 21 where the electrochemical reaction occurs. The casing 211 may contain one or more electrode assemblies 213. The electrode assembly 213 is mainly formed by winding or stacking positive and negative electrode sheets, and typically a separator is provided between the positive and negative electrode sheets. The portions of the positive and negative electrode sheets containing active material constitute the main body of the electrode assembly 213, while the portions of the positive and negative electrode sheets without active material each constitute a tab. The positive and negative tabs may 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 device 100, the positive and negative active materials react with the electrolyte, and the tabs connect to the electrode terminals to form a current loop.

[0083] Please refer to Figures 2 to 9 The first aspect of this application provides a battery device 100, including a housing assembly 10, a plurality of battery cell assemblies 20, and a thermal management component 30. The housing assembly 10 encloses a receiving space 101 and includes a first beam 111, which has a flow channel 1111 for the flow of heat exchange medium. The plurality of battery cell assemblies 20 are disposed in the receiving space 101, and each battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. The first beam 111 abuts against at least one battery cell assembly 20. The thermal management component 30 is disposed in the receiving space 101 and includes a heat exchange tube 32. The heat exchange tube 32 is disposed between two adjacent battery cell assemblies 20 and is used for heat exchange with the battery cell assembly 20.

[0084] The housing assembly 10 encloses the receiving space 101. The housing assembly 10 may include a housing 11, and may also include beams, such as expansion beams, disposed within the housing 11. The first beam 111 may be a beam used to enclose the receiving space 101, such as a side beam; the first beam 111 may also be a beam disposed within the receiving space 101, such as an expansion beam, a middle crossbeam, etc.

[0085] The first beam 111 has a flow channel 1111. The number of flow channels 1111 can be one or more. When there are multiple flow channels 1111, they can be connected in series and / or in parallel. The shape of the flow channel 1111 can be various, such as straight or curved. The flow channel 1111 is used for the flow of heat exchange medium. The heat exchange medium refers to the medium used for heat exchange with the battery cell assembly 20. The heat exchange medium can be water, air, coolant, etc.

[0086] The battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. For example, the plurality of battery cells 21 in the battery cell assembly 20 are arranged in a row along a first direction X.

[0087] The first beam 111 abuts against at least one battery cell assembly 20, meaning the first beam 111 is in close contact with at least one battery cell assembly 20. The first beam 111 and its adjacent battery cell assembly 20 can be in direct or indirect contact. For example, an insulating film is provided between the first beam 111 and the remaining adjacent battery cell assemblies 20, thus allowing the first beam 111 to be indirectly contacted with the battery cell assembly 20. When the heat exchange medium flows through the flow channel 1111, the first beam 111 can exchange heat with the battery cell assembly 20 to cool or heat the battery cell assembly 20.

[0088] The thermal management component 30 is used to perform thermal management on the battery cell assembly 20 to regulate the temperature of the battery cell assembly 20, including cooling and / or heating the battery cell assembly 20. The thermal management component 30 includes a heat exchange tube 32, which is a heat exchange component with a heat exchange channel 1111 inside. The cross-section of the heat exchange tube 32 can be a conventional shape such as circular, rectangular, or elliptical, or other irregular shapes. In some embodiments, the heat exchange tube 32 can be a flat tube.

[0089] The heat exchange tube 32 can be attached to the surface of the adjacent battery cell assembly 20. When the heat exchange medium flows in the heat exchange channel 1111, it can carry away the heat generated by the battery cell assembly 20, thereby cooling the battery cell assembly 20. The heat exchange tube 32 can also transfer heat to the battery cell assembly 20, thereby heating the battery cell assembly 20.

[0090] The heat exchange tube 32 is located between two adjacent battery cell modules 20. The heat exchange tube 32 can exchange heat between the battery cell modules 20 on both sides, thereby saving space for the thermal management component 30. Optionally, the heat exchange tube 32 is provided on one side of the battery cell module 20 (i.e., single-sided heat exchange), or the heat exchange tube 32 is provided on both opposite sides of the battery cell module 20 (i.e., double-sided heat exchange).

[0091] The battery cell assembly 20 that abuts against the first beam 111 can exchange heat with the first beam 111. The battery cell assembly 20 may not be in contact with the heat exchange tube 32, or one side of the battery cell assembly 20 may abut against the first beam 111 and the other side may be in contact with the heat exchange tube 32. Therefore, by providing a flow channel 1111 in the first beam 111, the first beam 111 can be used to exchange heat with the battery cell assembly 20 that abuts against it, saving the number and cost of heat exchange tubes 32.

[0092] In the battery device 100 provided in this embodiment, the heat exchange tube 32 can exchange heat with the battery cell assembly 20. Simultaneously, the first beam 111 has a flow channel 1111 within it, allowing the heat exchange medium to circulate. Thus, the first beam 111 can also exchange heat with the battery cell assembly 20 it opposes. The first beam 111 is part of the housing assembly 10. By utilizing the first beam 111 to exchange heat with at least one battery cell assembly 20, the number of heat exchange tubes 32 can be reduced, saving space occupied by the thermal management component 30 and reducing its weight and cost. This makes the battery device 100 more lightweight, facilitating weight reduction for both the battery device 100 and the electrical device using it. Furthermore, the first beam 111, being a beam within the housing assembly 10, not only possesses high strength and rigidity but also a large surface area and potential thermal conductivity, enabling efficient heat exchange and improving thermal management efficiency.

[0093] Please refer to Figure 3 As shown in the figure, in some embodiments, the battery cell 21 includes a first wall 2111, which is the sidewall with the largest area in the battery cell 21, and the heat exchange tube 32 and the first beam 111 are both attached to the first wall 2111 of the battery cell 21.

[0094] The battery cell 21 includes a housing 211, and a first wall 2111 is a wall in the housing 211, which is the side wall (i.e., the large surface) with the largest area in the battery cell 21. The battery cell 21 includes two first walls 2111, which are arranged opposite to each other, and at least one first wall 2111 can exchange heat with the heat exchange tube 32 or the first beam 111.

[0095] The first wall 2111 has a large area and generates a large amount of heat. The heat exchange tube 32 is in contact with the first wall 2111 of the adjacent battery cell 21, and the first beam 111 is also in contact with the first wall 2111 of the adjacent battery cell 21, resulting in high heat exchange efficiency. In addition, the heat exchange tube 32 and the first beam 111 can also provide stable support, constraint, and anti-deformation effect for the battery cell 21.

[0096] By adopting the above technical solution, both the heat exchange tube 32 and the first beam 111 can exchange heat on the large surface of the battery cell 21, resulting in good thermal management effect and high efficiency.

[0097] In some embodiments, the thermal management component 30 further includes a collector 31, which is connected to the flow channel 1111 and the heat exchange tube 32.

[0098] The collector 31 is used for collecting liquid, and there can be one or more collectors 31. Optionally, collectors 31 are provided at both ends of the heat exchange tube 32, and the heat exchange medium can circulate unidirectionally within the heat exchange tube 32, that is, the heat exchange medium can enter from the collector 31 at one end of the heat exchange tube 32 and then directly exit from the collector 31 at the other end of the heat exchange tube 32. Of course, the heat exchange medium can also circulate repeatedly within the heat exchange tube 32 before being discharged through the collector 31.

[0099] In this embodiment, the current collector 31 is not only connected to the heat exchange tube 32, but also to the flow channel 1111 in the first beam 111, so that the current collector 31 can introduce the heat exchange medium into the heat exchange tube 32 and the first beam 111, and / or concentrate the heat exchange medium in the heat exchange tube 32 and the first beam 111 for export.

[0100] In this way, the heat exchange tube 32 and the first beam 111 can share the current collector 31, which is simple in structure and conducive to the weight reduction of the battery device 100.

[0101] Please refer to Figures 4 to 9 In some embodiments, the current collector 31 includes a connecting pipe 311 and a plurality of mounting portions 312 connected to the connecting pipe 311, and the heat exchange pipe 32 and the first beam 111 are respectively sealed to the corresponding mounting portions 312.

[0102] There can be multiple heat exchange tubes 32, and each heat exchange tube 32 is connected and communicates with the connecting pipe 311 through a mounting part 312. The first beam 111 is also connected and communicates with the connecting pipe 311 through a mounting part 312. The mounting part 312 connecting the heat exchange tube 32 and the mounting part 312 connecting the first beam 111 can have the same or different structures.

[0103] The connecting pipe 311 includes multiple pipe sections, each of which is located between two adjacent mounting portions 312. The mounting portion 312 is provided with a liquid collection chamber, and the mounting portion 312 is connected to the connecting pipe 311 and to the corresponding flow channel 1111 or heat exchange pipe 32.

[0104] The first beam 111 is sealed to the corresponding mounting part 312. Optionally, the end of the first beam 111 with the flow channel 1111 is fixedly connected to the mounting part 312 by welding or other means.

[0105] The heat exchange tube 32 is sealed to the corresponding mounting part 312. Optionally, the heat exchange tube 32 is fixedly connected to the mounting part 312 by welding or other means.

[0106] By adopting the above technical solution, the flow channels 1111 in the heat exchange tube 32 and the first beam 111 can be sealed and connected with the collector 31, resulting in good sealing effect, simple structure and low cost.

[0107] In some embodiments, a plurality of battery cells 21 in the battery cell assembly 20 are arranged sequentially along a first direction X, and a plurality of battery cell assemblies 20 are arranged sequentially along a second direction Y. The first direction X is the length or width direction of the battery device 100, and the second direction Y intersects with the first direction X. The heat exchange tube 32 and the first beam 111 both extend along the first direction X, and the plurality of battery cell assemblies 20 are all located on the same side of the first beam 111 along the second direction Y.

[0108] Please refer to Figures 4 to 9 In some embodiments, the first direction X is the length direction of the battery device 100. When the battery device 100 is used in the vehicle 1000, the first direction X may be the front-rear direction of the vehicle 1000.

[0109] Please refer to Figure 10 and Figure 11 In some other embodiments, the first direction X is the width direction of the battery device 100. When the battery device 100 is used in the vehicle 1000, the first direction X may be the left and right direction of the vehicle 1000.

[0110] Multiple battery cell modules 20 are all located on the same side of the first beam 111 along the second direction Y, that is, the first beam 111 can exchange heat with the battery cell modules 20 located at the end, saving the heat exchange tube 32 at the end.

[0111] By adopting the above technical solution, the battery device 100 provided in this application embodiment has a wide range of applications and the battery cell assembly 20 can be arranged flexibly. The first beam 111 with flow channel 1111 can be set according to the arrangement of the battery cells 21. The first beam 111 can perform thermal management on the battery cell assembly 20 located at the end, saving the heat exchange tube 32 at the end and reducing the weight and cost of the thermal management component 30.

[0112] In some embodiments, the housing assembly 10 includes a plurality of side beams that surround and form a receiving space 101, and at least one side beam is a first beam 111.

[0113] Multiple border beams refer to the beams that enclose the frame of box 11, such as Figure 4 As shown, the multiple side beams are a first beam 111, a second beam 112, a third beam 113, and a fourth beam 114 connected in sequence. The first beam 111 and the third beam 113 are arranged opposite to each other, and the second beam 112 and the fourth beam 114 are arranged opposite to each other. In some embodiments, one of the side beams is a first beam 111 with a flow channel 1111. In other embodiments, both the third beam 113 and the first beam 111 may be provided with flow channels 1111.

[0114] The first beam 111 is a frame beam, and the material of the first beam 111 can be aluminum alloy, high-strength steel, steel-aluminum hybrid material, etc. The frame beam has multiple cavities, and the flow channel 1111 is set in at least one cavity, which facilitates molding, has a simple structure, and has a low cost.

[0115] like Figure 4 , Figure 5 As shown, the first beam 111 abuts against a row of battery cells 21. The large surfaces of the first beam 111 and the battery cells 21 are opposite each other. The first beam 111 is not only a frame beam, but also acts as an expansion beam 12, which can resist the expansion force of the battery cells 21 and suppress the expansion deformation of the battery cells 21.

[0116] In some embodiments, the first beam 111 is located on one side of the battery device 100 along its width direction. The first beam 111 can also serve as a mounting beam. When the battery device 100 is installed on the vehicle 1000, mounting points can be provided on the first beam 111 to fix the battery device 100 to the vehicle 1000.

[0117] By adopting the above technical solution, the first beam 111 can be a frame beam. As an important structural component of the battery device 100, the frame beam not only has high strength and rigidity, but also has a large surface area and potential heat conduction capacity. The frame beam can fit with multiple battery cells 21 at the end. By setting the flow channel 1111 inside the frame beam, efficient thermal management can be achieved, saving the heat exchange tube 32 at the end.

[0118] Please continue to refer to Figures 4 to 9 In some embodiments, the first beam 111 is provided with an inlet 102 and an outlet 103. The thermal management component 30 includes two collectors 31 spaced apart along the first direction X. Both collectors 31 are connected to the first beam 111. One collector 31 is connected to the inlet 102 and the other collector 31 is connected to the outlet 103.

[0119] The first beam 111 is provided with an inlet 102 and an outlet 103. The inlet 102 is used for the flow of heat exchange medium, and the outlet 103 is used for the flow of heat exchange medium. The inlet 102 and the outlet 103 are both spaced apart from the flow channel 1111 and are not connected. The inlet 102 and the outlet 103 are respectively connected to two collectors 31.

[0120] Two collectors 31 are connected to both ends of the heat exchange tube 32 respectively. The heat exchange medium can enter from the collector 31 at one end of the heat exchange tube 32 and then exit directly from the collector 31 at the other end of the heat exchange tube 32. The two collectors 31 are also connected to both ends of the first beam 111 respectively. The heat exchange medium can enter the flow channel 1111 from the collector 31 at one end and then exit from the collector 31 at the other end of the first beam 111.

[0121] Both manifolds 31 are directly connected to the first beam 111. One manifold 31 is connected at one end to the inlet 102, and the other manifold 31 is connected at one end to the outlet 103. Thus, the two manifolds 31 can be directly connected to the inlet 102 and the outlet 103, eliminating the need for the inlet pipe 33 and outlet pipe 34 between the manifolds 31 and the housing 11. Specifically, the connecting pipe 311 in one manifold 31 is fixedly connected to the first beam 111 and connected to the inlet 102, and the connecting pipe 311 in the other manifold 31 is also fixedly connected to the first beam 111 and connected to the inlet 102.

[0122] By adopting the above technical solution, the inlet 102 and the outlet 103 are both located on the first beam 111. The end of the current collector 31 is connected to the first flow channel 1111 and extends to the inlet 102 or the outlet 103 on the first beam 111. Thus, the current collector 31 can be directly connected to the inlet 102 or the outlet 103, reducing the number of inlet pipes 33 and outlet pipes 34 between the current collector 31 and the housing 11, which can save the assembly space inside the battery device 100.

[0123] Please refer to Figure 4 , Figure 8 and Figure 9 In some embodiments, the first beam 111 includes an integrally formed main body 1112 and a heat exchange part 1113. The heat exchange part 1113 is disposed on the side of the main body 1112 facing the battery cell assembly 20. The flow channel 1111 is disposed in the heat exchange part 1113. The heat exchange part 1113 extends along the battery cell assembly 20 and is disposed directly opposite to the battery cell assembly 20. The two ends of the main body 1112 are respectively fixedly connected to two side beams.

[0124] The first beam 111 is a frame beam, comprising an integrally formed main body 1112 and a heat exchange section 1113. The heat exchange section 1113 refers to the portion with internal flow channels 1111, while the main body 1112 comprises the remaining portions of the first beam 111. The heat exchange section 1113 is disposed directly opposite to at least one battery cell assembly 20. Optionally, the height of the heat exchange section 1113 may be the same as or similar to that of the heat exchange tube 32, while the height of the heat exchange tube 32 may be greater than that of the main body 1112, thereby giving the heat exchange tube 32 a larger heat exchange area. Optionally, the heat exchange section 1113 may be a flat tube shape; for example, the structure of the heat exchange section 1113 may be the same as or similar to that of the heat exchange tube 32.

[0125] The two ends of the main body 1112 are fixedly connected to two side beams, that is, the two ends of the main body 1112 are connected to the second beam 112 and the fourth beam 114 respectively, so that multiple side beams can surround the periphery of the accommodating space 101.

[0126] By adopting the above technical solution, the main body 1112 of the first beam 111 is used to connect adjacent frame beams, and the heat exchange part 1113 is used to set the flow channel 1111. The structure of the first beam 111 is ingenious and can simultaneously meet the structural strength requirements and heat exchange requirements of the battery device 100.

[0127] In some embodiments, the two ends of the main body 1112 extend beyond the heat exchange section 1113 along the first direction X, the water inlet 102 and the water outlet 103 are respectively provided at the two ends of the main body 1112, and the two collectors 31 are respectively connected to the main body 1112.

[0128] Along the first direction X, the length of the main body 1112 is greater than the length of the heat exchange part 1113, and the two ends of the main body 1112 extend beyond the heat exchange part 1113 along the first direction X. The main body 1112 can be connected to the side frame beams on both sides, and the heat exchange part 1113 can be connected to the collectors 31 at both ends.

[0129] The inlet 102 and the outlet 103 are respectively located at both ends of the main body 1112 to facilitate the connection of the end of the collector 31 with the inlet 102 or the outlet 103.

[0130] Optionally, the inlet 102 and the outlet 103 are connecting pipes that penetrate the main body 1112.

[0131] By adopting the above technical solution, the main body 1112 of the first beam 111 can be conveniently equipped with an inlet 102 and an outlet 103, saving connecting pipes and improving the space utilization rate inside the battery device 100.

[0132] In other embodiments, the inlet 102 and the outlet 103 may also be located at other positions on the housing assembly 10. For example, the inlet 102 and the outlet 103 may also be located on the second beam 112, the third beam 113 or the fourth beam 114.

[0133] Please refer to Figure 10 and Figure 11 In some embodiments, the housing assembly 10 includes a housing 11 and an expansion beam 12. The housing 11 encloses a receiving space 101, and the expansion beam 12 is located within the receiving space 101. The expansion beam 12 is used to resist the expansion force of the battery cell assembly 20, and the first beam 111 is the expansion beam 12.

[0134] Optionally, multiple battery cells 21 in the battery cell assembly 20 extend along a first direction X, which may be the width direction of the battery device 100; the heat exchange tube 32 and the first beam 111 both extend along the first direction X, the first beam 111 is an expansion beam 12, which is located on the same side of the multiple battery cell assemblies 20 along the second direction Y, and the expansion beam 12 abuts against at least one set of battery cell assemblies 20, and the expansion beam 12 may directly contact or indirectly adhere to the battery cell assembly 20.

[0135] In this embodiment, the first beam 111 with flow channel 1111 is an expansion beam 12. The expansion beam 12 can abut against at least one set of battery cell assembly 20. When the heat exchange medium flows in the flow channel 1111, the expansion beam 12 can exchange heat with the battery cell assembly 20 to perform thermal management of the battery cell assembly 20. This saves the heat exchange tube 32 required for the end battery cell assembly 20, reduces the number of heat exchange tubes 32, and reduces the weight and cost of the thermal management component 30, which is beneficial for the lightweighting of the battery device 100 and the power device.

[0136] Optionally, the inlet 102 and the outlet 103 are located on the housing 11, for example, on the side beam of the housing 11. One collector 31 is connected to the inlet 102 through the inlet pipe 33, and the other collector 31 is connected to the outlet 103 through the outlet pipe 34.

[0137] Please refer to Figures 2 to 11 In some embodiments, the flow channel 1111 is formed inside the first beam 111 by extrusion molding.

[0138] Extrusion molding can produce profiles with complex cross-sectional shapes. The first beam 111 can be made of aluminum alloy, which has good extrudability and is suitable for manufacturing beams such as the frame beams of the box 11. Of course, the first beam 111 can also be made of other materials suitable for extrusion molding.

[0139] By adopting the above technical solution, a flow channel 1111 with a preset length and complex cross-section can be manufactured by extrusion molding to meet the requirements of efficient heat exchange; the first beam 111 has high production efficiency, low manufacturing cost, and high manufacturing precision in the flow channel 1111.

[0140] In some embodiments, the flow channel 1111 includes at least one of a straight flow channel and a curved flow channel.

[0141] The number of flow channels 1111 can be one or more, and the flow channels 1111 can be straight flow channels and / or curved flow channels, such as S-shaped, U-shaped, etc.

[0142] The shape of the flow channel 1111 provided in this embodiment can be flexibly set so that the flow channel 1111 has a large heat exchange area, which meets the requirements of efficient heat exchange.

[0143] Please refer to Figures 1 to 11 Some embodiments of this application provide a battery device 100, including a housing assembly 10, a plurality of battery cell assemblies 20, and a thermal management component 30. The housing assembly 10 encloses a receiving space 101 and includes a first beam 111. The first beam 111 has a flow channel 1111 for the flow of heat exchange medium. The plurality of battery cell assemblies 20 are disposed in the receiving space 101. Each battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. The first beam 111 abuts against at least one battery cell assembly 20. The thermal management component 30 is disposed in the receiving space 101 and includes a heat exchange tube 32 and a current collector 31. The heat exchange tube 32 is used for heat exchange with the battery cell assembly 20, and the current collector 31 is connected to the heat exchange tube 32 and the flow channel 1111. The battery cell 21 includes a first wall 2111, which is the side wall with the largest area in the battery cell 21. The heat exchange tube 32 and the first beam 111 are both in contact with the first wall 2111 of the battery cell 21, and efficient thermal management is achieved through large-area heat exchange. Multiple battery cell components 20 are all located on the same side of the first beam 111. The first beam 111 can exchange heat with the battery cell components 20 at the end, saving the heat exchange tube 32, which makes the structure of the battery device 100 lighter and is conducive to the lightweighting of the battery device 100 and the power supply device.

[0144] An embodiment of the second aspect of this application provides an electrical device including a battery device 100 as provided in the first aspect, the battery device 100 being used to provide electrical energy.

[0145] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0146] The battery device 100 provided in this application embodiment is lighter and more convenient, which is conducive to the lightweighting of electrical devices.

[0147] The above embodiments are only used to illustrate the technical solutions of this application, and are not intended 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 of the technical features. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the spirit and scope of the technical solutions of the embodiments of this application, and should all be included within the protection scope of this application.

Claims

1. A battery device, characterized in that, The battery device includes: A housing assembly that encloses a receiving space, the housing assembly including a first beam, the first beam having a flow channel for the flow of heat exchange medium; Multiple battery cell assemblies are disposed within the accommodating space, each battery cell assembly comprising multiple battery cells arranged sequentially, and the first beam abuts against at least one of the battery cell assemblies; A thermal management component is disposed within the accommodating space. The thermal management component includes a heat exchange tube and a current collector. The heat exchange tube is disposed between two adjacent battery cell assemblies and is used for heat exchange with the battery cell assemblies. The flow channel and the heat exchange tube are both connected to the current collector. The current collector includes a connecting pipe and multiple mounting parts. The heat exchange tube and the first beam are respectively sealed and connected to the corresponding mounting parts.

2. The battery device as claimed in claim 1, characterized in that, The battery cell includes a first wall, which is the side wall with the largest area in the battery cell. The heat exchange tube and the first beam are both attached to the first wall of the battery cell.

3. The battery device as claimed in claim 1, characterized in that, The plurality of battery cells in the battery cell assembly are arranged sequentially along a first direction, and the plurality of battery cell assemblies are arranged sequentially along a second direction, wherein the first direction is the length direction or width direction of the battery device, and the second direction intersects with the first direction; Both the heat exchange tube and the first beam extend along the first direction, and the plurality of battery cell assemblies are all located on the same side of the first beam along the second direction.

4. The battery device as claimed in claim 3, characterized in that, The box assembly includes multiple side beams, which enclose the receiving space, and at least one of the side beams is the first beam.

5. The battery device as claimed in claim 4, characterized in that, The first beam is provided with an inlet and an outlet. The thermal management component includes two collectors spaced apart along the first direction. Both collectors are connected to the first beam. One collector is connected to the inlet and the other collector is connected to the outlet.

6. The battery device as claimed in claim 5, characterized in that, The first beam includes an integrally formed main body and a heat exchange part. The heat exchange part is located on the side of the main body facing the battery cell assembly. The flow channel is located inside the heat exchange part. The heat exchange part extends along the battery cell assembly and is positioned directly opposite the battery cell assembly. The two ends of the main body are respectively fixedly connected to the two frame beams.

7. The battery device as claimed in claim 6, characterized in that, The main body extends beyond the heat exchange section at both ends along the first direction. The water inlet and the water outlet are both located on the main body, and the two water collectors are respectively connected to the main body.

8. The battery device according to any one of claims 1-7, characterized in that, The housing assembly includes a housing and an expansion beam. The housing encloses the receiving space, and the expansion beam is located within the receiving space. The expansion beam is used to resist the expansion force of the battery cell assembly, and the first beam is the expansion beam.

9. The battery device according to any one of claims 1-7, characterized in that, The flow channel is formed inside the first beam by extrusion molding.

10. The battery device according to any one of claims 1-7, characterized in that, The flow channel includes at least one of a straight flow channel and a curved flow channel.

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

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