Battery device and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery monomer assembly is arranged in the box body; the heat management component is arranged in the box body, the heat management component comprises at least one heat exchange tube group, the heat exchange tube group is in contact with the battery monomer assembly, the heat exchange tube group comprises at least one heat exchange tube, a flow channel for a heat exchange medium to circulate is arranged in the heat exchange tube, the heat exchange tube is movably arranged in the box body, and the heat exchange tube group is in contact with the battery monomer assembly. And the heat exchange tube can move in the vertical direction relative to the battery monomer assembly under the action of external force. According to the battery device provided by the embodiment of the invention, the heat exchange tube group is used for performing heat management on the battery monomer assembly, so that the heat management reliability is improved.

Description

Technical Field

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

[0002] In recent years, new energy vehicles have made leaps and bounds in development. In the field of electric vehicles, power batteries, as the power source of electric vehicles, play an irreplaceable and important role.

[0003] Solid-state batteries are a type of battery that uses a solid material as an electrolyte. Solid-state batteries have advantages such as high charging efficiency, high energy density, and low risk of combustion and explosion, making them highly valuable for research.

[0004] During continuous charging and discharging, individual battery cells generate a large amount of heat. Therefore, thermal management components are installed inside the battery casing to regulate the temperature of the individual cells and alleviate the temperature rise inside the battery. However, the reliability of battery thermal management still needs to be improved. Utility Model Content

[0005] In view of this, embodiments of this application provide a battery device and an electrical device that can improve the thermal management reliability of the battery device.

[0006] An embodiment of the first aspect of this application provides a battery device, comprising: a housing; a battery cell assembly disposed within the housing; and a thermal management component disposed within the housing. The thermal management component includes at least one heat exchange tube assembly in contact with the battery cell assembly. The heat exchange tube assembly includes at least one heat exchange tube, and the heat exchange tube has a flow channel for the flow of a heat exchange medium. The heat exchange tube is movably disposed within the housing so that it can move vertically relative to the battery cell assembly under the action of an external force.

[0007] In the battery device provided in the above embodiments, the heat exchange tube assembly is in contact with the battery cell assembly. By circulating the heat exchange medium in the flow channel of the heat exchange tube, the heat exchange tube can exchange heat with the battery cell assembly to regulate the temperature of the battery cell assembly. When the battery device is subjected to external force, since the heat exchange tube can move up and down relative to the battery cell assembly, the heat exchange tube can contact multiple parts of the battery cell assembly to form a more sufficient contact. This is beneficial for the battery cell assembly to dissipate heat fully through the interface contact with the heat exchange tube, promotes the uniformity of temperature management, improves the thermal management effect, helps to achieve a better effect in suppressing thermal runaway, and improves the thermal management reliability of the battery device.

[0008] In some embodiments, the heat exchange tube assembly includes a plurality of heat exchange tubes arranged side by side.

[0009] The heat exchange tube assembly efficiently removes heat from individual battery cells through multiple flow channels, thereby improving the heat exchange efficiency of the heat exchange tube assembly and further enhancing the reliability of thermal management.

[0010] In some embodiments, the arrangement direction of the plurality of heat exchange tubes is perpendicular to the extension direction of the heat exchange tubes; and / or, the arrangement direction of the plurality of heat exchange tubes is parallel to the height direction of the battery cell assembly.

[0011] By adopting the above technical solution and arranging multiple heat exchange tubes, the space inside the chamber can be effectively utilized, and more heat exchange tubes can be installed in a limited space, thereby further improving thermal management efficiency.

[0012] In some embodiments, the heat exchange tube is a flexible metal tube.

[0013] By adopting the above technical solution, the heat exchange tube is made of metal and has a certain degree of flexible deformation capability, which is conducive to the heat exchange tube moving up and down in the box. In addition, the heat exchange tube has good thermal conductivity and high heat exchange efficiency.

[0014] In some embodiments, the heat exchange tube is a circular tube with a diameter less than or equal to 3 mm.

[0015] By adopting the above technical solution, the diameter of the heat exchange tube is smaller, which makes it easy to arrange one or more heat exchange tubes in a suitable space, effectively utilize the space, and improve the space utilization rate of the heat exchange tube group.

[0016] In some embodiments, the number of battery cell assemblies is multiple, and the heat exchange tube assembly is provided between at least two adjacent battery cell assemblies; the battery cell assembly includes multiple battery cells, each battery cell includes a bottom wall, a first wall and a second wall connected to the bottom wall, the first wall intersects the second wall, and the first wall is the wall with the largest area in the battery cell; the heat exchange tube assembly is in contact with the first wall, or the heat exchange tube assembly is in contact with the second wall.

[0017] By adopting the above technical solution, a heat exchange tube assembly can simultaneously exchange heat with at least two adjacent battery cell modules, saving the weight and space occupied by the thermal management components; the heat exchange tube assembly can contact the first or second wall of the battery cell, and can achieve good thermal management effect.

[0018] In some embodiments, a plurality of battery cells in the battery cell assembly are arranged sequentially along a first direction, and a plurality of battery cell assemblies are arranged sequentially along a second direction, wherein the second direction intersects the first direction;

[0019] A first gap is formed between two rows of adjacent battery cell assemblies arranged along the second direction. The heat exchange tube is movably disposed in the first gap, extends along the first direction, and the heat exchange tube assembly is in contact with the second wall.

[0020] By adopting the above technical solution, the heat exchange tube is located in the first gap between the two rows of battery cell modules, which does not occupy the volume space of the battery cell modules and improves the energy density of the battery device.

[0021] In some embodiments, a plurality of battery cells in the battery cell assembly are arranged sequentially along a first direction, and a plurality of battery cell assemblies are arranged simultaneously along a first direction and a second direction, wherein the first direction and the second direction intersect; the heat exchange tube extends along the second direction, and the heat exchange tube assembly is in contact with the first wall.

[0022] By adopting the above technical solution, the heat exchange tube assembly can achieve a larger contact area and a better heat exchange effect with the first wall.

[0023] In some embodiments, a second gap is formed between two adjacent battery cell assemblies arranged along the first direction, and the heat exchange tube is movably disposed in the second gap.

[0024] By adopting the above technical solution, the heat exchange tube assembly is located in the second gap between the battery cells, which can simultaneously exchange heat between two rows of battery cells, resulting in high thermal management efficiency. The heat exchange tube assembly does not occupy the internal space of the battery cells, which is beneficial to improving the energy density of the battery device.

[0025] In some embodiments, each heat exchange tube assembly is disposed between two adjacent rows of battery cells arranged along the first direction.

[0026] By adopting the above technical solution, the heat exchange tube assembly comes into contact with the two rows of battery cells and exchanges heat with the first wall of the battery cells, further improving the thermal management efficiency and thermal management reliability.

[0027] In some embodiments, the battery cell is a solid-state battery cell.

[0028] By adopting the above technical solutions, the solutions of this application embodiment can be applied to solid-state battery devices, and can improve the thermal management reliability of solid-state battery devices.

[0029] In some embodiments, the housing is provided with a support beam, which supports the heat exchange tube assembly below.

[0030] By adopting the above technical solution, the heat exchange tube can be supported by the support beam, and the heat exchange tube can move up and down above the support beam so that the heat exchange tube can uniformly exchange heat with the contact surface of the battery cell.

[0031] In some embodiments, the extension direction of the heat exchange tube intersects the extension direction of the support beam.

[0032] By adopting the above technical solution, the part of the heat exchange tube located above the support beam can be supported, while the rest of the heat exchange tube can be suspended, thus enhancing the mobility of the heat exchange tube.

[0033] 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 store or provide electrical energy.

[0034] 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

[0035] 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.

[0036] Figure 1 This is a schematic diagram of the structure of a vehicle provided in one embodiment of this application;

[0037] Figure 2 This is an exploded view of a battery device provided in an embodiment of this application;

[0038] Figure 3 This is an exploded view of a single battery cell provided in an embodiment of this application;

[0039] Figure 4 This is a schematic diagram of the structure of a battery cell assembly and thermal management components provided in an embodiment of this application;

[0040] Figure 5 This is a schematic diagram of the structure of a battery cell assembly and thermal management components provided in another embodiment of this application.

[0041] Figure 6 This is a cross-sectional schematic diagram of a heat exchange tube assembly and the battery cells on both sides provided in an embodiment of this application.

[0042] The markings in the diagram mean:

[0043] 1000, Vehicle; 100, Battery assembly;

[0044] 10. Housing; 11. Upper housing; 12. Lower housing; 121. Support beam; 122. Heat exchange medium inlet / outlet;

[0045] 20. Battery cell assembly; 201. First gap; 202. Second gap; 21. Battery cell; 211. Housing; 2111. First wall; 2112. Second wall; 212. End cap; 213. Electrode assembly; 214. Electrode terminal; 215. Pressure relief mechanism;

[0046] 30. Thermal management components; 31. Heat exchanger tube assembly; 311. Heat exchanger tube; 3111. Flow channel; 32. Manifold;

[0047] 40. Busbar. Detailed Implementation

[0048] 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.

[0049] 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.

[0050] 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.

[0051] 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.

[0052] 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.

[0053] 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).

[0054] In the description of the embodiments of this application, the technical terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and do not 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.

[0055] 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.

[0056] Unless otherwise specified, all embodiments and optional embodiments of this application can be combined to form new technical solutions.

[0057] Unless otherwise specified, all technical features and optional technical features of this application may be combined to form new technical solutions.

[0058] Solid-state batteries are a type of battery that uses a solid material as an electrolyte. Solid-state batteries have advantages such as high charging efficiency, high energy density, and low risk of combustion and explosion, making them highly valuable for research.

[0059] The individual cells inside the battery generate a lot of heat during continuous charging and discharging. Therefore, thermal management components are installed inside the battery box to regulate the temperature of the individual cells. However, the reliability of the battery's thermal management still needs to be improved.

[0060] In some cases, the thermal management components of solid-state batteries include cooling fans located inside the casing. These cooling fans also generate heat when they are working, and they need to be replaced and maintained regularly, which is not conducive to improving the reliability of the battery's thermal management.

[0061] In view of this, this application provides a battery device, including a housing, a battery cell assembly disposed within the housing, and a thermal management component. The thermal management component includes at least one heat exchange tube assembly, and the heat exchange tube assembly includes at least one heat exchange tube. The heat exchange tube assembly is in contact with the battery cell assembly. The heat exchange tube has a flow channel for the flow of heat exchange medium. The heat exchange tube is movably disposed within the housing so that the heat exchange tube can move vertically relative to the battery cell assembly under the action of an external force.

[0062] In the battery device provided in the above embodiments, the heat exchange tube assembly is in contact with the battery cell assembly. By circulating a heat exchange medium within the flow channel of the heat exchange tube, heat exchange can be exchanged between the heat exchange tube and the battery cell assembly to regulate the temperature of the battery cell assembly. Since the heat exchange tube can move vertically relative to the battery cell assembly, it can make more thorough contact with the battery cell assembly, facilitating sufficient heat dissipation through the interface between the battery cell assembly and the heat exchange tube. This promotes uniform temperature management, improves thermal management effectiveness, and helps to achieve better suppression of thermal runaway, thereby enhancing the thermal management reliability of the battery device. Compared to using a cooling fan for thermal management, the thermal management component provided in this application embodiment has a simpler structure, does not generate additional heat, reduces the need for regular replacement and maintenance, and improves thermal management reliability.

[0063] The technical solutions described in the embodiments of this application are applicable to battery devices and electrical devices that use battery devices.

[0064] 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.

[0065] 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.

[0066] The battery device disclosed in this application can be used in electrical devices that use the battery device as a power source or in various energy storage systems that use the battery device as an energy storage element. Electrical devices include, for example, mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles, ships, and spacecraft. Spacecraft include, for example, airplanes, rockets, space shuttles, and spacecraft.

[0067] For ease of explanation, the following embodiments will be described using a vehicle as an example of an electrical device according to an embodiment of this application.

[0068] Please refer to Figure 1 , Figure 1 This is a schematic diagram of the structure of a vehicle 1000 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 provided 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.

[0069] 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.

[0070] refer to Figure 2 , Figure 2 This is an exploded structural diagram of a battery device 100 provided in some embodiments of this application. The battery device mentioned in the embodiments of this application may include one or more battery cell assemblies 20 for providing voltage and capacity. A battery cell assembly 20 may include multiple battery cells 21, which are connected in series, parallel, or mixed connections via busbars.

[0071] Please refer to Figure 3The battery cell 21 is the smallest unit constituting a battery device. The battery cell 21 includes a housing 211, an end cap 212, an electrode assembly 213, and other functional components. The end cap 212 is a component that closes onto the opening of the housing 211 to isolate the internal environment of the battery cell 21 from the external environment. The housing 211 is a component used to cooperate with the end cap 212 to form the internal environment of the battery cell 21, wherein the formed internal environment can be used to accommodate the electrode assembly 213, electrolyte, and other components. The electrode assembly 213 is the component in the battery cell 21 where electrochemical reactions occur. The housing 211 may contain one or more electrode assemblies 213. In some embodiments, the end cap 212 may be provided with functional components such as electrode terminals 214 and pressure relief mechanisms 215. The electrode terminals 214 can be used to electrically connect to the electrode assembly 213 for outputting or inputting electrical energy into the battery cell 21. The pressure relief mechanism 215 is a component or part that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold.

[0072] In some embodiments, the multiple battery cells 21 in the battery device 100 can be electrically connected through a busbar to achieve parallel, series, or mixed connection of the multiple battery cells 21 in the battery device 100.

[0073] 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 together with cable ties.

[0074] In some embodiments, the battery device 100 may be a battery pack, which includes a housing 10 and one or more battery cell assemblies 20, the battery cell assemblies 20 being housed within the housing 10.

[0075] As an example, the battery cell assembly 20 can be a battery module, which can be housed in the housing 10 by fixing the battery module in the housing 10.

[0076] As an example, the battery cell assembly 20 can also be housed in the housing 10 by directly fixing multiple battery cells 21 to the housing 10.

[0077] As an example, the housing 10 may include an upper housing 11 and a lower housing 12. The upper housing 11 and the lower housing 12 are fastened together to form a closed receiving cavity inside the housing 10 to house the battery cell assembly 20. Here, "closed" means covered or closed, and can be either sealed or unsealed.

[0078] As an example, the housing 10 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 10 forms a closed receiving cavity to house the battery cell assembly 20.

[0079] As an example, the housing 10 can be part of the chassis structure of the vehicle 1000. For example, the top cover of the housing 10 can be at least part of the floor of the vehicle 1000, or the frame of the housing 10 can be at least part of the crossbeams and longitudinal beams of the vehicle 1000.

[0080] In some embodiments, battery device 100 refers to an energy storage device, which includes a housing with a door on at least one side. The energy storage device includes energy storage containers, energy storage cabinets, etc.

[0081] An embodiment of the first aspect of this application provides a battery device 100. Please refer to... Figures 2 to 6 The battery device 100 includes a housing 10, a battery cell assembly 20, and a thermal management component 30. Both the battery cell assembly 20 and the thermal management component 30 are disposed within the housing 10. The thermal management component 30 includes at least one heat exchange tube assembly 31, which is in contact with the battery cell assembly 20. The heat exchange tube assembly 31 includes at least one heat exchange tube 311, which has a flow channel 3111 for the flow of heat exchange medium. The heat exchange tube 311 is movably disposed within the housing 10 so that it can move vertically relative to the battery cell assembly 20 under the action of external force.

[0082] The battery cell assembly 20 includes a plurality of battery cells 21, and the number of battery cell assemblies 20 may be one or more.

[0083] The thermal management component 30 includes heat exchange tube assemblies 31, which can be one or more, each including at least one heat exchange tube 311. The heat exchange tube 311 is a tube body for flowing a heat exchange medium, and each heat exchange tube 311 has a flow channel 3111 through which the heat exchange medium flows. The heat exchange medium can be, but is not limited to, water, ethylene glycol solution, phase change material, etc.

[0084] The heat exchange tube 311 is movable in the vertical direction relative to the battery cell assembly 20, that is, the heat exchange tube 311 is movable up and down relative to the battery cell assembly 20. "Up and down" refers to the height direction of the battery cell assembly 20. In some embodiments, at least a portion of the heat exchange tube 311 is not fixed along its extension direction, so that the unfixed portion of the heat exchange tube 311 can be moved up and down by an external force. The battery device 100 can be installed in electrical equipment such as vehicles. Taking a vehicle as an example, the vehicle vibrates up and down during driving, which can cause the heat exchange tube 311 to move up and down in the vertical direction under the action of an external force.

[0085] In the battery device 100 provided in the above embodiments, the heat exchange tube assembly 31 is in contact with the battery cell assembly 20. By circulating a heat exchange medium in the flow channel 3111 of the heat exchange tube 311, heat exchange can be achieved between the heat exchange tube 311 and the battery cell assembly 20, thereby regulating the temperature of the battery cell assembly 20. Since the heat exchange tube 311 can move up and down relative to the battery cell assembly 20, it can make more thorough contact with multiple parts of the battery cell assembly 20. This facilitates the battery cell assembly 20 to dissipate heat fully through interface contact with the heat exchange tube 311, promoting uniform temperature management, improving the thermal management effect, and achieving a better effect in suppressing thermal runaway, thus improving the thermal management reliability of the battery device 100. Compared with the method of using a cooling fan for thermal management, the thermal management component 30 provided in this application embodiment has a simpler structure, does not generate additional heat, reduces the need for regular replacement and maintenance, and improves the reliability of thermal management.

[0086] like Figures 4 to 6 As shown, in some embodiments, the heat exchange tube group 31 includes a plurality of heat exchange tubes 311, which are arranged side by side.

[0087] Multiple heat exchange tubes 311 are arranged side by side, and at least one heat exchange tube 311 can move up and down relative to the battery cell assembly 20. At least one heat exchange tube 311 can contact the battery cell assembly 20, and the heat exchange tube 311 that is not in direct contact with the battery cell assembly 20 can transfer heat to the battery cell assembly 20 indirectly. Each heat exchange tube 311 has a flow channel 3111, which has an outlet and an inlet, and can independently allow the heat exchange medium to flow through it.

[0088] Since the heat exchange tube assembly 31 includes multiple heat exchange tubes 311 arranged in parallel, and the flow channels 3111 in the multiple heat exchange tubes 311 can all carry heat exchange medium, the heat exchange tube assembly 31 efficiently removes the heat from the battery cell assembly 20 through the multiple flow channels 3111, thereby improving the heat exchange efficiency of the heat exchange tube assembly 31 and further improving the reliability of thermal management.

[0089] In some embodiments, the arrangement direction of the plurality of heat exchange tubes 311 is perpendicular to the extension direction of the heat exchange tubes 311; and / or, the arrangement direction of the plurality of heat exchange tubes 311 is parallel to the height direction of the battery cell assembly 20.

[0090] The arrangement direction of the multiple heat exchange tubes 311 is perpendicular to the extension direction of the heat exchange tubes 311, enabling the multiple heat exchange tubes 311 to be arranged side by side in two adjacent battery cell assemblies 20. For example, Figure 4 As shown, heat exchange tubes 311 extend along the first direction X, and multiple heat exchange tubes 311 are arranged along the second direction Y; as Figure 5As shown, the heat exchange tube 311 extends along the second direction Y, and multiple heat exchange tubes 311 are arranged along the first direction X.

[0091] The battery cell assembly 20 includes multiple battery cells 21, and the height direction of the battery cell assembly 20 is also the height direction of the battery cells 21. For example... Figures 4 to 6 As shown, the arrangement of multiple heat exchange tubes 311 is parallel to the height direction of the battery cell assembly 20 (the third direction Z in the figure).

[0092] Optionally, multiple heat exchange tubes 311 are arranged simultaneously along the first direction X and the third direction Z, or multiple heat exchange tubes 311 are arranged simultaneously along the second direction Y and the third direction Z, such that the heat exchange tube group 31 includes multiple arrayed heat exchange tubes 311.

[0093] By adopting the above technical solution and arranging multiple heat exchange tubes 311, the space inside the housing 10 can be effectively utilized, and more heat exchange tubes 311 can be set in a limited space, further improving the thermal management efficiency.

[0094] In some embodiments, the heat exchange tube 311 is a flexible metal tube.

[0095] Flexible metal tube refers to heat exchange tube 311 being made of metal and possessing a certain degree of flexibility and deformation capability. The heat exchange tube 311 is made of metal, which has good thermal conductivity, resulting in high heat exchange efficiency. The flexible deformation capability of the heat exchange tube 311 facilitates its vertical movement within the housing 10.

[0096] Optionally, the heat exchange tube 311 is made of stainless steel; the heat exchange medium can be anhydrous ethylene glycol, and the anhydrous nature avoids the corrosive effect of ethylene glycol on stainless steel tubes due to its acidity when it comes into contact with water.

[0097] By adopting the above technical solution, the heat exchange tube 311 is made of metal and has a certain degree of flexible deformation capability, which is conducive to the heat exchange tube 311 moving up and down in the box 10. In addition, the heat exchange tube 311 has good thermal conductivity and high heat exchange efficiency.

[0098] In some embodiments, the heat exchange tube 311 is a circular tube with a diameter less than or equal to 3 mm.

[0099] The diameter of heat exchange tube 311 refers to its outer diameter. The diameter of heat exchange tube 311 is no greater than 3mm. For example, the diameter of heat exchange tube 311 can be 1mm, 2mm, 2.5mm, 3mm, etc.

[0100] In some embodiments, the diameter of the heat exchange tube 311 is less than 10% of the height of the battery cell 21. For example, the battery cell 21 has a length of 148 mm, a width of 27 mm, and a height of 92 mm. Of course, the size of the battery cell 21 is not limited to these dimensions.

[0101] By adopting the above technical solution, the diameter of the heat exchange tube 311 is less than or equal to 3mm. Due to the small diameter of the heat exchange tube 311, one or more heat exchange tubes 311 can be conveniently arranged in a suitable space, effectively utilizing the space and improving the space utilization rate of the heat exchange tube group 31.

[0102] In other embodiments, the diameter of the heat exchange tube 311 may also be greater than 3 mm, for example, the diameter of the heat exchange tube 311 may not be greater than 5 mm.

[0103] Please refer to Figures 2 to 6 In some embodiments, there are multiple battery cell assemblies 20, and a heat exchange tube assembly 31 is provided between at least two adjacent battery cell assemblies 20. The battery cell assembly 20 includes multiple battery cells 21, and each battery cell 21 includes a bottom wall, a first wall 2111 connected to the bottom wall, and a second wall 2112. The first wall 2111 and the second wall 2112 intersect, and the first wall 2111 is the wall with the largest area among the battery cells 21. The heat exchange tube assembly 31 is in contact with the first wall 2111, or the heat exchange tube assembly 31 is in contact with the second wall 2112.

[0104] The heat exchange tube assembly 31 is disposed between at least two adjacent battery cell modules 20. The heat exchange tube assembly 31 can contact at least two adjacent battery cell modules 20 at the same time, which can save the number of heat exchange tube assemblies 31 and achieve better thermal management effect.

[0105] The battery cell 21 includes a housing 211 and an end cap 212. The housing 211 includes a bottom wall, two first walls 2111 and two second walls 2112. The first wall 2111 is the wall with the largest area in the battery cell 21, and the first wall 2111 can become the large surface of the battery cell 21.

[0106] like Figure 5 As shown, in some embodiments, the heat exchange tube assembly 31 is in contact with the first wall 2111, that is, the heat exchange tube assembly 31 can exchange heat with the first wall 2111. Since the first wall 2111 has the largest area, the heat exchange efficiency is better.

[0107] like Figure 4 As shown, in some other embodiments, the heat exchange tube assembly 31 is in contact with the second wall 2112, the area of ​​the second wall 2112 is second only to the area of ​​the first wall 2111, and the heat exchange tube assembly 31 can also have good heat exchange efficiency.

[0108] By adopting the above technical solution, a heat exchange tube assembly 31 can simultaneously exchange heat with at least two adjacent battery cell assemblies 20, saving the weight and space occupied by the thermal management component 30; the heat exchange tube assembly 31 can contact the first wall 2111 or the second wall 2112 of the battery cell 21, both of which can achieve good thermal management effect.

[0109] Please refer to Figure 4 Multiple battery cells 21 in the battery cell assembly 20 are arranged sequentially along the first direction X, and multiple battery cell assemblies 20 are arranged sequentially along the second direction Y, which intersects with the first direction X; a first gap 201 is formed between two rows of battery cell assemblies 20 arranged adjacent to each other along the second direction Y, and a heat exchange tube 311 is movably disposed in the first gap 201. The heat exchange tube 311 extends along the first direction X, and the heat exchange tube assembly 31 is in contact with the second wall 2112.

[0110] Multiple battery cells 21 in the battery cell assembly 20 are arranged sequentially along a first direction X, such that multiple first walls 2111 are arranged sequentially along the first direction X. A heat exchange tube assembly 31 is disposed between two adjacent rows of battery cell assemblies 20 arranged along a second direction Y, so that one heat exchange tube assembly 31 can contact two rows of battery cell assemblies 20 simultaneously. Furthermore, the heat exchange tube assembly 31 is in contact with the second walls 2112 of the multiple battery cells 21.

[0111] By adopting the above technical solution, the heat exchange tube 311 is located in the first gap 201 between the two rows of battery cell modules 20, without occupying the volume space of the battery cell modules 20, thus improving the energy density of the battery device 100; the heat exchange tube 311 contacts the second wall 2112 of the battery cell 21, and the contact interface between the heat exchange tube group 31 and the battery cell 21 will fully cool the battery cells 21 on both sides through heat convection, reducing the risk of thermal runaway due to overheating of the battery cell 21.

[0112] Please refer to Figure 5 In some embodiments, a plurality of battery cells 21 in the battery cell assembly 20 are arranged sequentially along a first direction X, and the plurality of battery cell assemblies 20 are arranged simultaneously along the first direction X and the second direction Y, wherein the first direction X and the second direction Y intersect; the heat exchange tube 311 extends along the second direction, and the heat exchange tube assembly 31 is in contact with the first wall 2111.

[0113] The heat exchange tube assembly 31 contacts the first wall 2111 of the battery cell 21. Since the first wall 2111 is the large surface of the battery cell 21, the contact between the heat exchange tube assembly 31 and the first wall 2111 can achieve a large contact area and a good heat exchange effect.

[0114] In some embodiments, the heat exchange tube assembly 31 contacts the first wall 2111 of the battery cell 21, and a second gap 202 is formed between two adjacent battery cell assemblies 20 arranged along the first direction X, and the heat exchange tube 311 is movably disposed in the second gap 202.

[0115] Multiple battery cells 21 in the battery cell assembly 20 are electrically connected through a busbar 40, which may include multiple busbar segments. The battery cell assembly 20 may include multiple battery cells 21 arranged along a first direction X, or it may include multiple battery cells 21 arranged simultaneously along the first direction X and the second direction Y.

[0116] For example, a second gap is formed between two adjacent battery cell assemblies 20 arranged along the first direction X. A heat exchange tube 311 is disposed in the second gap 202 and can move within the second gap 202 so that the heat exchange tube 311 can fully contact the battery cell 21.

[0117] By adopting the above technical solution, the heat exchange tube group 31 is located in the second gap 202 between the battery cell modules 20, which can simultaneously exchange heat between the two rows of battery cell modules 20, resulting in high thermal management efficiency. The heat exchange tube group 31 does not occupy the internal space of the battery cell module 20, which is beneficial to improving the energy density of the battery device 100.

[0118] In some embodiments, the heat exchange tube assembly 31 is in contact with the first wall 2111 of the battery cell 21, and each heat exchange tube assembly 31 is respectively disposed between two adjacent rows of battery cells 21 arranged along the first direction X.

[0119] For example, there are multiple heat exchange tube groups 31, each heat exchange tube group 31 includes multiple heat exchange tubes 311 extending along the second direction Y. Each pair of battery cell assemblies 20 is provided with a set of heat exchange tube groups 31, that is, the first wall 2111 of each battery cell 21 can contact the heat exchange tube group 31, which further improves the thermal management efficiency.

[0120] By adopting the above technical solution, the heat exchange tube assembly 31 contacts the two rows of battery cells 21 and exchanges heat with the first wall 2111 of the battery cells 21, which further improves the thermal management efficiency and thermal management reliability.

[0121] In some embodiments, the battery cell 21 is a solid-state battery cell.

[0122] Solid-state battery cells use solid materials as electrolytes. The solution in this application embodiment can be applied to solid-state battery device 100, and can improve the thermal management reliability of solid-state battery device 100.

[0123] In other embodiments, the battery cell 21 may be of other types, such as a lithium-ion battery.

[0124] In some embodiments, the housing 10 is provided with a support beam 121, which is supported below the heat exchange tube assembly 31.

[0125] Please refer to Figure 4 and Figure 5 The support beam 121 can support the heat exchange tube 311, and the heat exchange tube 311 can move up and down relative to the battery cell assembly 20 under the action of external force.

[0126] The support beam 121 can be a longitudinal beam extending along the length of the box body 10, or a transverse beam extending along the width of the box body 10. The number of support beams 121 can be one or more.

[0127] Optionally, the two ends of the heat exchange tube 311 do not need to be fixed, and the middle part of the heat exchange tube 311 is supported above the support beam 121, so that the two ends of the heat exchange tube 311 can swing up and down easily. Optionally, one end of the heat exchange tube 311 can also be fixed, and the middle part of the heat exchange tube 311 can be left unfixed, as long as the heat exchange tube 311 has a free movable part.

[0128] By adopting the above technical solution, the heat exchange tube 311 can be supported by the support beam 121, and the heat exchange tube 311 can move up and down above the support beam 121 so that the heat exchange tube 311 can uniformly exchange heat with the contact surface of the battery cell 21.

[0129] In some embodiments, the extending direction of the heat exchange tube 311 intersects the extending direction of the support beam 121. The intersection of the heat exchange tube 311 and the support beam 121 allows the portion of the heat exchange tube 311 located above the support beam 121 to be supported, while the remaining portion of the heat exchange tube 311 can be suspended, enhancing the mobility of the heat exchange tube 311.

[0130] In other embodiments, the heat exchange tube 311 may also extend along the extension direction of the support beam 121.

[0131] like Figure 2 and Figure 4 As shown, in some embodiments, the thermal management component 30 further includes a manifold 32, through which the heat exchange tube assembly 31 is installed within the housing 10. The heat exchange tubes 311 are movable vertically relative to the battery cell assembly 20. Multiple heat exchange tubes 311 in the heat exchange tube assembly 31 are connected and communicate with the manifold 32, and the manifold 32 communicates with the heat exchange medium inlet / outlet 122 provided on the housing 10. Optionally, the ends of the heat exchange tubes 311 are connected to the manifold 32 via flexible hoses (such as rubber hoses or silicone hoses), further improving the flexibility of the heat exchange tubes 311 within the housing 10.

[0132] The collector 32 has an internal cavity for distributing and combining the heat exchange medium. The collector 32 can be tubular, box-shaped, etc. The flow channel 3111 of the heat exchange tube 311 is connected to the internal cavity of the collector 32.

[0133] Optionally, there are two manifolds 32 and two heat exchange medium inlets / outlets 122. The two heat exchange medium inlets / outlets 122 serve as the heat exchange medium inlet and outlet, respectively. The heat exchange tube group 31 is connected between the two manifolds 32, and the two manifolds 32 are connected to the two heat exchange medium inlets / outlets 122 in a one-to-one correspondence.

[0134] Optionally, the manifold 32 can be connected to multiple heat exchanger tube groups 31 simultaneously.

[0135] The heat exchange tube assembly 31 can be installed inside the housing 10 in various ways. For example, the end of the heat exchange tube assembly 31 can be connected to the inner wall of the housing 10 by a clamp. The mounting hole of the clamp can be oblong, and the end of the heat exchange tube assembly 31 can be located in the mounting hole of the clamp and can move within the mounting hole.

[0136] Please refer to Figures 2 to 6 Some embodiments of this application provide a battery device 100, including a housing 10, a battery cell assembly 20, and a thermal management component 30. Both the battery cell assembly 20 and the thermal management component 30 are disposed within the housing 10. The thermal management component 30 includes at least one heat exchange tube assembly 31, which is in contact with the battery cell assembly 20. Each heat exchange tube assembly 31 includes at least one heat exchange tube 311, with a flow channel 3111 within it for the flow of a heat exchange medium. The heat exchange tube 311 is vertically movable relative to the battery cell assembly 20. The heat exchange tube assembly 31 includes multiple heat exchange tubes 311 arranged side-by-side. Each heat exchange tube 311 is a flexible metal tube. The heat exchange tube assembly 31 is in contact with either the first wall 2111 or the second wall 2112 of the battery cell 21.

[0137] The second aspect of this application provides an electrical device, including the battery device 100 of the first aspect, the battery device 100 being used to provide electrical energy to the electrical device.

[0138] The power supply device can be any of the aforementioned devices or systems that utilize battery device 100.

[0139] 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, include: Box; The battery cell assembly is located inside the housing; A thermal management component is disposed within the housing. The thermal management component includes at least one heat exchange tube assembly, which is in contact with the battery cell assembly. The heat exchange tube assembly includes at least one heat exchange tube, and the heat exchange tube has a flow channel for the flow of heat exchange medium. The heat exchange tube is movably disposed within the housing so that the heat exchange tube can move vertically relative to the battery cell assembly under the action of external force.

2. The battery device as claimed in claim 1, characterized in that, The heat exchange tube assembly includes multiple heat exchange tubes arranged side by side.

3. The battery device as claimed in claim 2, characterized in that, The arrangement direction of the plurality of heat exchange tubes is perpendicular to the extension direction of the heat exchange tubes; and / or, The arrangement of the plurality of heat exchange tubes is parallel to the height direction of the battery cell assembly.

4. The battery device as claimed in claim 1, characterized in that, The heat exchange tube is a flexible metal tube.

5. The battery device as claimed in claim 1, characterized in that, The heat exchange tube is a circular tube with a diameter less than or equal to 3 mm.

6. The battery device as claimed in claim 1, characterized in that, The number of battery cell assemblies is multiple, and the heat exchange tube group is provided between at least two adjacent battery cell assemblies; the battery cell assembly includes multiple battery cells, and each battery cell includes a bottom wall, a first wall and a second wall connected to the bottom wall, the first wall and the second wall intersect, and the first wall is the wall with the largest area in the battery cell; The heat exchange tube assembly is in contact with the first wall, or the heat exchange tube assembly is in contact with the second wall.

7. The battery device as claimed in claim 6, 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, the second direction intersecting the first direction; A first gap is formed between two rows of adjacent battery cell assemblies arranged along the second direction. The heat exchange tube is movably disposed in the first gap, extends along the first direction, and the heat exchange tube assembly is in contact with the second wall.

8. The battery device as claimed in claim 6, characterized in that, The battery cell assembly consists of multiple battery cells arranged sequentially along a first direction, and multiple battery cell assemblies are simultaneously arranged along a first direction and a second direction, wherein the first direction and the second direction intersect. The heat exchange tubes extend along the second direction, and the heat exchange tube assembly is in contact with the first wall.

9. The battery device as claimed in claim 8, characterized in that, A second gap is formed between two adjacent battery cell assemblies arranged along the first direction, and the heat exchange tube is movably disposed in the second gap.

10. The battery device as claimed in claim 8, characterized in that, Each heat exchange tube assembly is disposed between two adjacent rows of battery cells arranged along the first direction.

11. The battery device according to any one of claims 1-10, characterized in that, The battery cell is a solid-state battery cell.

12. The battery device according to any one of claims 1-10, characterized in that, The box is equipped with a support beam, which supports the heat exchange tube assembly below.

13. The battery device as claimed in claim 12, characterized in that, The extension direction of the heat exchange tube intersects with the extension direction of the support beam.

14. An electrical appliance, characterized in that, Includes a battery device as described in any one of claims 1-13, the battery device being used to store or provide electrical energy.

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