Battery device and electric device

Abstract

The utility model relates to the field of batteries, and provides a battery device and a power utilization device. The battery device comprises a box body, a battery cell assembly and a heat management part. The battery monomer assembly is arranged in the box body, the battery monomer assembly comprises at least one battery monomer, and the surface with the largest area in each side surface of the battery monomer is the large surface of the battery monomer. The heat management component is arranged in the box body and is arranged side by side with the battery monomer assembly along a first direction, the first direction is perpendicular to the large surface of the battery monomer, and the heat management component is connected with the large surface of the battery monomer in a heat exchange manner. The heat management component comprises a base body and a heat exchange tube, at least part of the heat exchange tube is embedded in the base body, the base body is a heat-conducting insulating elastic piece, and the base body elastically abuts against the adjacent battery monomer assembly. On the basis, the heat management component can be in elastic abutting connection, heat exchange connection and insulation contact with the adjacent battery monomer assembly through the base body, so that the risk of insulation failure caused by particles falling between the heat management component and the battery monomer assembly can be reduced.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of batteries, and particularly relates to a battery device and a power utilization device. BACKGROUND

[0002] In some cases, the battery device includes a box body, and a battery cell assembly and a thermal management component accommodated in the box body. The thermal management component and the battery cell assembly are arranged side by side along a direction perpendicular to a large face of the battery cell, that is, a face with the largest area among the battery cell sides, so that the thermal management component and the large face of the battery cell are in heat exchange connection to regulate the temperature of the battery cell. In this case, insulation failure is prone to occur between the thermal management component and the battery cell assembly due to particles falling therebetween. To this end, the related industry will paste an insulating film on the side of the thermal management component facing the battery cell assembly, and will also coat silicone glue on the top side and the bottom side of the thermal management component and the battery cell assembly opposite in the direction of gravity, but in this way, it is still difficult to effectively prevent the problem of insulation failure between the thermal management component and the battery cell assembly due to particles falling therebetween. CONTENT OF THE UTILITY MODEL

[0003] Embodiments of the application provide a battery device, aiming to solve the problem of insulation failure between the thermal management component and the battery cell assembly due to particles falling therebetween.

[0004] To achieve the above-mentioned purpose, the technical solution adopted by the embodiments of the application is as follows:

[0005] In a first aspect, a battery device is provided, comprising:

[0006] a box body;

[0007] a battery cell assembly arranged in the box body, the battery cell assembly comprising at least one battery cell, and a large face of the battery cell being a face with the largest area among the battery cell sides;

[0008] a thermal management component arranged in the box body and arranged side by side with the battery cell assembly along a first direction perpendicular to the large face of the battery cell, the thermal management component being in heat exchange connection with the large face of the battery cell; the thermal management component comprises a base and a heat exchange pipe, at least part of the heat exchange pipe being embedded in the interior of the base, the base being a heat-conducting and insulating elastic member, and the base being in elastic abutment with the adjacent battery cell assembly.

[0009] The battery device provided by the embodiments of the present application can be in elastic abutment with the adjacent battery monomer assembly through the base body and can be connected for heat exchange, and the heat exchange pipe embedded in at least most of the base body can provide a flow channel for the heat exchange medium, so that the heat exchange medium flowing in the heat exchange pipe can exchange heat with the adjacent battery monomer assembly through the heat exchange pipe and the base body, and the heat exchange area is large, thereby maintaining and improving the heat exchange effect and efficiency between the heat management component and the adjacent battery monomer assembly, and maintaining and improving the heat management performance of the heat management component. On this basis, the heat management component can be in elastic abutment and insulated contact with the adjacent battery monomer assembly through the base body, and the gap between the base body and the adjacent battery monomer assembly can be sealed. Based on this, on the one hand, the risk of particles falling between the base body and the adjacent battery monomer assembly can be effectively reduced, and even if particles fall between the base body and the adjacent battery monomer assembly, the particles can be insulated and wrapped by the base body to reduce the risk of insulation failure caused by the particles piercing the base body, thereby effectively reducing the risk of insulation failure between the heat management component and the battery monomer assembly due to particles falling therebetween. On the one hand, in the case where the bottom side of the battery monomer assembly and the heat management component in the direction of gravity is fixed to the box through structural adhesive bonding, the risk of structural adhesive overflow between the base body and the adjacent battery monomer assembly can be reduced, and the risk of battery monomer swelling and lithium precipitation caused by structural adhesive overflow to the large surface of the battery monomer can be reduced. On the one hand, it is not necessary to add an insulating film to the side of the base body facing the adjacent battery monomer assembly, it is not necessary to coat silicone adhesive to the top side and the bottom side of the heat management component and the adjacent battery monomer assembly in the direction of gravity, and it is not necessary to paste a glue blocking strip to the bottom side of the heat management component and the adjacent battery monomer assembly in the direction of gravity, thereby saving insulating film pasting equipment, silicone adhesive coating equipment, glue blocking strip pasting equipment and other equipment in the production process, and reducing material cost and equipment cost and other manufacturing costs.

[0010] In some embodiments, the heat exchange pipe comprises a first inlet and outlet section, a heat exchange section and a second inlet and outlet section connected in sequence, and the heat exchange section is embedded in the interior of the base body; the first inlet and outlet section and the second inlet and outlet section extend from at least one side of the base body in a direction perpendicular to the first direction.

[0011] By adopting the above scheme, the heat exchange pipe can be embedded in the inside of the base body through the heat exchange section, so that most of the heat exchange pipe is in full contact with the base body, thereby the heat exchange area of the heat exchange medium and the base body can be increased, the elastic abutment and heat exchange connection of the base body and the adjacent battery cell assembly can be matched, and the heat exchange effect and efficiency between the heat management component and the adjacent battery cell assembly can be optimized. On this basis, the heat exchange pipe can avoid the arrangement space of the battery cell assembly along the first direction, and through the first access section and the second access section extending from the side of the base body, the heat exchange pipe can be conveniently and reliably connected to other pipelines (such as current collectors) in the side space of the battery cell assembly, thereby the overall pipeline layout can be optimized, the smooth entry and circulation of the heat exchange medium can be facilitated, and the compactness of the internal structure of the battery device can be improved.

[0012] In some embodiments, the first access section and the second access section extend from opposite sides of the base body along the extension direction thereof.

[0013] By adopting the above scheme, by extending the first access section and the second access section from opposite sides of the base body along the extension direction thereof, a "through type" flow channel layout can be formed, the heat exchange medium can flow from the first access section on one side of the base body to the second access section on the other side of the base body, the heat exchange medium can flow through and cover most of the area of the base body, thereby the heat exchange uniformity and effect between the heat management component and the battery cell assembly can be significantly improved. Moreover, the space can be dispersed, the first access section and the second access section can be connected to other pipelines (such as current collectors) on one side of the base body, and the first access section and the second access section can be connected to other pipelines (such as current collectors) on the other side of the base body, thereby the interference risk during pipeline connection operation can be reduced, the assembly convenience and efficiency can be improved, and the regularity, rationality and compactness of the overall structure of the battery device can be improved.

[0014] In some embodiments, the heat exchange section is bent.

[0015] By adopting the above scheme, the heat exchange section embedded in the inside of the base body can be bent, so as to efficiently utilize the limited space in the inside of the base body, effectively increase the extension length of the flow channel, and effectively prolong the extension path of the flow channel, thereby on the basis of improving the internal space utilization rate of the heat management component, the heat exchange range and area of the heat exchange section and the heat exchange medium flowing therein and the base body can be increased, the local heat exchange blind area can be reduced, and the heat exchange effect and efficiency between the heat management component and the adjacent battery cell assembly can be optimized.

[0016] In some embodiments, the thickness of the base body along the first direction is H, the outer diameter dimension of the heat exchange pipe along the first direction is D, h = (H-D) / 2, and h ranges from 0.5mm to 2mm.

[0017] By adopting the above scheme, the thickness (i.e. h) of the base body on the side outside the heat exchange pipe in the first direction can be controlled in a reasonable range of 0.5mm-2mm, so as to promote the base body to form a uniform and sufficient heat-conducting and insulating elastic layer outside the heat exchange pipe in the first direction. Based on this, the base body can be closely and elastically abutted against the battery monomer assembly and maintain excellent heat exchange contact, and in the case that particles are sandwiched between the base body and the battery monomer assembly, the sufficient thickness of the insulating material can accommodate and wrap the particles, so as to reduce the risk of insulation failure caused by the particles piercing the base body, and in particular, reduce the risk of insulation failure between the heat exchange pipe and the battery monomer assembly caused by the particles piercing the part of the base body outside the heat exchange pipe in the first direction.

[0018] In some embodiments, the base body is bonded with the adjacent battery monomer assembly.

[0019] By adopting the above scheme, by bonding the base body with the adjacent battery monomer assembly, the connection stability, connection reliability and fit between the thermal management component and the adjacent battery monomer assembly can be strengthened, the base body can be closely fitted to the large face of the battery monomer, the contact thermal resistance can be significantly reduced, and the heat exchange efficiency and thermal management stability can be effectively improved in cooperation with the heat exchange pipe embedded in the base body. Moreover, the base body and the adjacent battery monomer assembly can form a double seal based on elastic abutment and bonding fixation, so as to basically block the path of particles and structural glue entering between the base body and the adjacent battery monomer assembly, significantly reduce the risk of insulation failure between the thermal management component and the battery monomer assembly due to particles falling therebetween, and significantly reduce the risk of battery monomer swelling being blocked and lithium precipitation of the battery monomer due to structural glue overflowing to the large face of the battery monomer.

[0020] In some embodiments, the base body is a rubber piece.

[0021] By adopting the above scheme, by using rubber material for the base body, the base body can have high elasticity, good heat conductivity and insulation of rubber, so as to optimize the heat conduction performance, insulation performance and elastic performance of the base body.

[0022] In some embodiments, the base body is an injection molding structure, and the heat exchange pipe is insert molded in the base body.

[0023] By adopting the above scheme, the base body and the heat exchange pipe can form a stable integrated structure by making the base body an injection molding structure and embedding the heat exchange pipe insert in the base body, which can improve the connection reliability and structural integrity between the base body and the heat exchange pipe, can basically avoid the risk of heat exchange failure and insulation damage due to loosening, displacement and falling of the heat exchange pipe relative to the base body, can reduce the contact gap and thermal resistance between the heat exchange pipe and the base body, and can promote the heat of the heat exchange medium to be efficiently transferred to the base body through the heat exchange pipe and then quickly conducted to the battery cell assembly, thereby optimizing the heat exchange efficiency between the heat management component and the battery cell assembly. Moreover, the integrated molding process can eliminate the additional assembly and fixing steps, can simplify the production process of the heat management component, can reduce the processing error and manufacturing cost, and can improve the production efficiency and economy of the battery device.

[0024] In some embodiments, the heat exchange pipe includes a round pipe section.

[0025] By adopting the above scheme, the at least round pipe section of the heat exchange pipe has better pressure resistance, thereby improving the use reliability and service life of the heat exchange pipe. Moreover, the at least round pipe section of the heat exchange pipe is convenient for bending molding, thereby improving the processing convenience and layout flexibility of the heat exchange pipe.

[0026] In some embodiments, the heat exchange pipe includes a flat pipe section.

[0027] By adopting the above scheme, compared with the round pipe section, the flat pipe section can be embedded by less base body, thereby reducing the material amount of the base body to reduce the cost and reducing the overall volume of the heat management component along the first direction, which can promote the compactness and integration of the battery device, and is beneficial to improve the space utilization and energy density of the battery device. Moreover, compared with the round pipe section, the flat pipe section has a larger contact area with the base body, which can efficiently transfer the heat of the heat exchange medium to the base body and then quickly conduct to the battery cell assembly, thereby optimizing the heat exchange effect and efficiency between the heat management component and the battery cell assembly.

[0028] In some embodiments, the heat management component and the battery cell assembly are alternately arranged along the first direction.

[0029] By adopting the above scheme, by alternately arranging the heat management components and the battery monomer assemblies along the first direction, the relative two sides of each battery monomer assembly along the first direction can be in efficient heat exchange with the heat management components, so that the heat exchange can be comprehensive and uniform, and the consistency and efficiency of the overall heat management can be improved. Moreover, the alternative arrangement can make any adjacent heat management component and battery monomer assembly tightly fit, so as to seal the gap between each group of adjacent heat management components and battery monomer assemblies, thereby greatly reducing the risk of insulation failure between the heat management components and the battery monomer assemblies due to particles falling therebetween, greatly reducing the risk of the battery monomer swelling being blocked due to the structural adhesive overflowing to the large surface of the battery monomer, causing the battery monomer to lithiumize, etc. Without additional insulation film, silicone adhesive, and blocking adhesive strip structures, insulation film, silicone adhesive, and blocking adhesive strip equipment are not required in the production process, and the material cost and equipment cost can be greatly reduced.

[0030] In some embodiments, the battery device includes a battery unit, the battery unit includes a battery monomer assembly, a heat insulation pad, and another battery monomer assembly arranged in sequence along a first direction, and the heat management components and the battery unit are alternately arranged along the first direction.

[0031] By adopting the above scheme, the battery unit and the heat management component can be arranged alternately, and the battery monomer assembly and the heat management component can be arranged alternately. Based on this, one side of each battery monomer assembly along the first direction can be in efficient heat exchange with the heat management component, and the other side of each battery monomer assembly along the first direction can be heat-insulated from the adjacent battery monomer assembly via the heat insulation pad, so as to maintain the effect and efficiency of the overall heat management. Moreover, the gap between the heat management component and the battery unit can be sealed by the elastic abutment of the base, and the gap between the battery monomer assembly of the battery unit and the heat insulation pad can also be sealed by the elastic abutment of the heat insulation pad when the heat insulation pad has insulation and elastic properties, so as to basically block the entry path of particles and structural adhesive, greatly reduce the risk of insulation failure, greatly reduce the risk of the battery monomer swelling being blocked due to the structural adhesive overflowing to the large surface of the battery monomer, causing the battery monomer to lithiumize, etc. Without additional insulation film, silicone adhesive, and blocking adhesive strip structures, insulation film, silicone adhesive, and blocking adhesive strip equipment are not required in the production process, and the material cost and equipment cost can be greatly reduced.

[0032] In some embodiments, the battery monomer assembly includes a plurality of battery monomers arranged in sequence along a second direction, and the second direction is perpendicular to the first direction.

[0033] By adopting the above scheme, and arranging multiple battery cells sequentially along a second direction perpendicular to the first direction to form a battery cell assembly, it is possible to achieve integrated and dense layout of battery cells, thereby improving space utilization. Furthermore, it allows for efficient heat exchange between the large surface area of ​​each battery cell and the thermal management components, ensuring comprehensive heat exchange coverage. Additionally, it facilitates elastic contact and sealing between each battery cell in the battery cell assembly and the substrate of the thermal management components, effectively preventing particle falling and structural adhesive overflow. Therefore, it is possible to simultaneously improve the space utilization, energy density, thermal management consistency, thermal management efficiency, reliability, and production economy of the battery device.

[0034] Secondly, an electrical device is provided, including the battery device provided in the embodiments of this application.

[0035] By adopting the above solution, the electrical device can improve its reliability, operational reliability, operational stability, and service life by using the battery device provided in the embodiments of this application. Attached Figure Description

[0036] To clearly illustrate the technical solutions in the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art 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.

[0037] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0038] Figure 2 This is an exploded view of a battery device provided in some embodiments of this application;

[0039] Figure 3 for Figure 2 A schematic diagram of the structure of a single battery cell is provided;

[0040] Figure 4 for Figure 2 Schematic diagrams of the provided thermal management components and current collectors;

[0041] Figure 5 for Figure 4 A front view of the provided thermal management components;

[0042] Figure 6 for Figure 5 A schematic diagram of the internal structure of the provided thermal management component;

[0043] Figure 7 for Figure 5 Side view of the provided thermal management components;

[0044] Figure 8 Part structure diagram of a battery device provided for another embodiment of the present application, in which the heat management components and the battery cells are arranged alternately along a first direction.

[0045] In the drawings:

[0046] 1 - battery device, 2 - controller, 3 - motor, 10 - case, 20 - battery cell assembly, 21 - battery cell, 211 - large face of the battery cell, 30 - heat management component, 31 - base body, 32 - heat exchange pipe, 321 - first inlet and outlet section, 322 - heat exchange section, 323 - second inlet and outlet section, 40 - current collector, 50 - thermal insulation pad, 100 - battery cell, x - first direction, y - second direction. DETAILED DESCRIPTION

[0047] In order to make the technical problems to be solved, technical solutions and beneficial effects of the present application clear, the present application will be described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and not to limit the present application. If not specifically stated, all embodiments and optional embodiments of the present application can be combined to form new technical solutions. If not specifically stated, all technical features and optional technical features of the present application can be combined to form new technical solutions.

[0048] In the description of the present application, it should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the purpose of facilitating the description of the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0049] In addition, the terms "first" and "second" are only for descriptive purposes and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. Therefore, the features defined with "first" and "second" can explicitly or implicitly include one or more of the features. In the description of the present application, the meaning of "multiple" is two or more, unless otherwise specifically limited.

[0050] In this application, unless otherwise expressly specified and limited, the terms "mounting", "connecting", "connecting", "fixing" and the like should be understood broadly, for example, can be fixed connection, can also be detachable connection, or integrated; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the internal communication of two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0051] The battery device is a modular structure including at least two battery monomers to provide higher voltage and capacity, for example, can be a battery module, a battery pack or a battery pack. In some cases, the battery device includes a box, and a battery monomer assembly and a heat management component are both accommodated in the box; the heat management component is arranged side by side with the battery monomer assembly in a direction perpendicular to the large face of the battery monomer (that is, the largest face among the respective sides of the battery monomer), so that the heat management component and the large face of the battery monomer are heat-exchangeably connected to reliably regulate the temperature of the battery monomer; the bottom side of both the battery monomer assembly and the heat management component in the direction of gravity is fixed to the box by structural adhesive.

[0052] In this case, insulation failure is prone to occur between the heat management component and the battery monomer assembly due to particles (including particles during production process and particles during pressure relief of the battery monomer) falling therebetween, and for this reason, the related industry will paste an insulating film on the side of the heat management component facing the battery monomer assembly, so that the heat management component contacts the large face of the battery monomer through the insulating film, thereby hindering the particles from piercing through through the insulating film to reduce the risk of insulation failure; and will also coat silicone glue on the top side and the bottom side of both the heat management component and the battery monomer assembly in the direction of gravity, so as to hinder the particles from falling between the heat management component and the battery monomer assembly through the silicone glue to reduce the risk of insulation failure. However, in this way, it is still difficult to effectively prevent the problem of "insulation failure prone to occur between the heat management component and the battery monomer assembly due to particles falling therebetween".

[0053] In this case, it is also prone to cause failure conditions such as expansion of the battery monomer being blocked, lithium precipitation of the battery monomer, etc. due to the structural glue overflowing between the heat management component and the battery monomer assembly and solidifying, and for this reason, the related industry will cover a glue blocking strip on the bottom side of the silicone glue on the bottom side of both the heat management component and the battery monomer assembly, so as to hinder the structural glue from overflowing between the heat management component and the battery monomer assembly through the glue blocking strip.

[0054] Therefore, the insulation film, the silicone glue, the glue blocking strip and the like need to be added, and the insulation film gluing equipment, the silicone glue coating equipment, the glue blocking strip gluing equipment and the like need to be added in the production process, which increases the manufacturing cost (including the BOM (Bill of Materials) cost and the equipment cost).

[0055] Therefore, some embodiments of the present application provide a battery device, in which the heat management component can be elastically abutted and heat-exchangeably connected to the adjacent battery monomer assembly through the base body, and a flow channel for circulating a heat exchange medium is provided through the heat exchange pipe buried in at least most of the base body, so that the heat exchange medium flowing in the heat exchange pipe can exchange heat with the adjacent battery monomer assembly through the heat exchange pipe and the base body, and the heat exchange area is large, thereby maintaining and improving the heat exchange effect and efficiency between the heat management component and the adjacent battery monomer assembly, and maintaining and improving the heat management performance of the heat management component. On this basis, the heat management component can be elastically abutted and insulatedly contacted to the adjacent battery monomer assembly through the base body, and the gap between the base body and the adjacent battery monomer assembly is sealed. Based on this, on the one hand, the risk of particles falling between the base body and the adjacent battery monomer assembly can be effectively reduced, and even if particles fall between the base body and the adjacent battery monomer assembly, the particles can be insulatedly wrapped by the base body to reduce the risk of the particles piercing the base body and causing insulation failure, thereby effectively reducing the risk of insulation failure between the heat management component and the battery monomer assembly due to particles falling therebetween. On the one hand, in the case that the bottom side of the battery monomer assembly and the heat management component in the gravity direction is fixed to the box through structural adhesive bonding, the risk of structural adhesive overflow between the base body and the adjacent battery monomer assembly can be reduced, and the risk of battery monomer swelling and lithium precipitation due to structural adhesive overflow to the large surface of the battery monomer can be reduced. On the one hand, the insulation film need not be added to the side of the base body facing the adjacent battery monomer assembly, the silicone glue need not be coated on the top side and the bottom side of the heat management component and the adjacent battery monomer assembly in the gravity direction, and the glue blocking strip need not be pasted on the bottom side of the heat management component and the adjacent battery monomer assembly in the gravity direction, thereby saving the insulation film gluing equipment, the silicone glue coating equipment, the glue blocking strip gluing equipment and the like in the production process, and reducing the material cost and the equipment cost and other manufacturing costs.

[0056] The battery device disclosed by the embodiments of the present application can be used in an electric device using the battery device as a power supply, or in various energy storage systems using the battery device as an energy storage element. The electric device can be, but is not limited to, a vehicle, a mobile phone, a portable device, a notebook computer, a ship, a spacecraft, an electric toy, an electric tool, and the like. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. The spacecraft includes an airplane, a rocket, a space shuttle, a spacecraft, and the like. The electric toy includes a fixed or mobile electric toy, such as a game machine, an electric automobile toy, an electric ship toy, an electric airplane toy, and the like. The electric tool includes a metal cutting electric tool, a grinding electric tool, an assembling electric tool, and a railway electric tool, such as an electric drill, an electric grinder, an electric wrench, an electric screwdriver, an electric hammer, an impact electric drill, a concrete vibrator, an electric planer, and the like.

[0057] In order to illustrate the technical solutions provided by the present application, the following will be described in detail with reference to specific drawings and embodiments, and taking a vehicle as an example.

[0058] Please refer to Figure 1 , Figure 1 The structural schematic diagram of a vehicle provided by some embodiments of the present application is shown. The vehicle can be a fuel automobile, a gas automobile, or a new energy automobile, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile, or a range extended automobile, and the like. The vehicle is internally provided with a battery device 1, which can be arranged at the bottom, the head, or the tail of the vehicle. The battery device 1 is used to supply power to the vehicle, for example, the battery device 1 can be used as an operating power supply of the vehicle. The vehicle can further include a controller 2 and a motor 3, and the controller 2 is used to control the battery device 1 to supply power to the motor 3, for example, to meet the working power demand of the vehicle during starting, navigation, and driving.

[0059] In some embodiments of the present application, the battery device 1 can not only be used as an operating power supply of the vehicle, but also be used as a driving power supply of the vehicle, to replace or partially replace fuel or natural gas to provide driving power for the vehicle.

[0060] Please refer to Figure 2 , Figure 3 , Figure 4 , Figure 5Some embodiments of the present application provide a battery device 1, comprising a box 10, a battery cell assembly 20 and a thermal management component 30. The battery cell assembly 20 is arranged in the box 10, and the battery cell assembly 20 comprises at least one battery cell 21, the largest area of each side of the battery cell 21 is a large side 211 of the battery cell. The thermal management component 30 is arranged in the box 10 and arranged side by side with the battery cell assembly 20 along a first direction x, the first direction x is perpendicular to the large side 211 of the battery cell, and the thermal management component 30 is heat-exchangeably connected with the large side 211 of the battery cell. The thermal management component 30 comprises a base body 31 and a heat exchange pipe 32, at least part of the heat exchange pipe 32 is embedded in the inside of the base body 31, the base body 31 is a heat-conducting insulating elastic member, and the base body 31 elastically abuts against the adjacent battery cell assembly 20.

[0061] It should be noted that the box 10 is used to provide a containing space for the battery cell assembly 20 and the thermal management component 30, the box 10 can prevent dust, water and other foreign matters from entering the battery cell assembly 20 and the thermal management component 30, and can reduce the influence of external liquid or other foreign matters on the performance of the battery cell assembly 20 and the thermal management component 30, thereby effectively prolonging the service life of the battery device 1.

[0062] The box 10 can adopt various structures. In some embodiments, the box 10 can comprise a first part and a second part, the first part and the second part are overlapped with each other, and the first part and the second part jointly define a containing space for containing the battery cell assembly 20 and the thermal management component 30. The second part can be a hollow structure with one end open, and the first part can be a plate-shaped structure, the first part is overlapped with the open side of the second part to jointly define the containing space with the second part. Alternatively, the first part and the second part can both be hollow structures with one side open, and the open side of the first part is overlapped with the open side of the second part. The box 10 can have various shapes, such as a cylinder or a cuboid. The box 10 can be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc.

[0063] The battery cell assembly 20 is an energy storage unit capable of converting chemical energy into electrical energy. The battery cell assembly 20 is arranged in the inside of the box 10. In the box 10, one battery cell assembly 20 can be arranged, or at least two battery cell assemblies 20 can be arranged. In the case where at least two battery cell assemblies 20 are arranged, the at least two battery cell assemblies 20 can be arranged in sequence along the first direction x, and the at least two battery cell assemblies 20 can be connected in series, in parallel or in a mixed manner. The mixed connection means that the at least two battery cell assemblies 20 are connected in series and in parallel.

[0064] The battery cell assembly 20 can include at least one battery cell 21. In the case where the battery cell assembly 20 includes at least two battery cells 21, the at least two battery cells 21 can be arranged in sequence along a second direction y perpendicular to the first direction x, and the at least two battery cells 21 can be connected in series, in parallel, or in a hybrid manner. The battery cell 21 can be a lithium ion secondary battery cell, a lithium-sulfur battery cell, a sodium lithium ion battery cell, a sodium ion battery cell, a magnesium ion battery cell, or the like. The battery cell 21 can have a cylindrical shape, a flat shape, a cuboid shape, or other shapes. The battery cell 21 can be packaged in different ways to form a cylindrical battery cell, a square battery cell, a soft-pack battery cell, or the like. The battery cell 21 has two large faces opposite along the first direction x, and the large face 211 of the battery cell is the largest face among the sides of the battery cell 21, and the large face 211 is perpendicular to the first direction x.

[0065] The thermal management component 30 is a key component for thermal regulation of the battery device 1. The thermal management component 30 is arranged inside the box 10. The thermal management component 30 can be arranged as needed. The thermal management component 30 and the battery cell assembly 20 are arranged side by side along the first direction x, and the thermal management component 30 and the battery cell assembly 20 can be arranged alternately along the first direction x (i.e., arranged in the manner of “thermal management component 30, battery cell assembly 20, thermal management component 30, …” or “battery cell assembly 20, thermal management component 30, battery cell assembly 20, …”), or can be arranged flexibly as needed along the first direction x (e.g., one thermal management component 30 can be arranged every two battery cell assemblies 20, etc.). Based on this, the thermal management component 30 can be in heat exchange connection with the large face 211 of the battery cell of the adjacent battery cell assembly 20, so that the thermal management component 30 can exchange heat with the large face 211 of the battery cell and the heat exchange area is large, thereby efficiently and reliably regulating the temperature of the battery cell 21.

[0066] The heat management component 30 comprises a base body 31 and a heat exchange pipe 32. The base body 31 is a heat-conducting, insulating and elastic member with heat-conducting, insulating and elastic properties. The base body 31 can be in the form of, but is not limited to, a plate. The material of the base body 31 can be flexibly set as needed, for example, silicone, polyurethane, fluororubber and the like. The heat exchange pipe 32 is a pipe structure with heat-conducting properties. The cross-sectional shape of the heat exchange pipe 32 can be set as needed. The “cross section” is a cross section perpendicular to the central axis of the heat exchange pipe 32. The inner space of the heat exchange pipe 32 can form a flow channel for the flow of a heat exchange medium. The heat exchange medium can be used to adjust the temperature of the battery monomer 21. The heat exchange medium can be a liquid or a gas, and can be, but is not limited to, water, a mixture of water and ethylene glycol, air, oil, refrigerant and the like. The heat exchange pipe 32 can be linearly extended, curvedly extended or zigzag extended. The width, extension path and the like of the heat exchange pipe 32 and the flow channel thereof can be flexibly set as needed. Most or even substantially all of the heat exchange pipe 32 is embedded in the interior of the base body 31.

[0067] Based on the heat-conducting and elastic properties of the base body 31, the base body 31 elastically abuts against and is heat-conductingly connected to the large face 211 of the adjacent battery monomer assembly 20. Since most or even substantially all of the heat exchange pipe 32 is embedded in the interior of the base body 31, the heat exchange medium flowing in the heat exchange pipe 32 can exchange heat with the adjacent battery monomer assembly 20 through the heat exchange pipe 32 and the base body 31, and the heat exchange area is large, thereby maintaining and improving the heat exchange effect and efficiency between the heat management component 30 and the adjacent battery monomer assembly 20, and maintaining and improving the heat management performance of the heat management component 30.

[0068] Based on the elastic property of the substrate 31, the substrate 31 will elastically abut against the adjacent battery cell assembly 20 to seal the gap between the substrate 31 and the adjacent battery cell assembly 20. Based on this, the silicone glue can be applied on the top and bottom sides of both the thermal management component 30 and the adjacent battery cell assembly 20 (to seal the gap between the thermal management component 30 and the adjacent battery cell assembly 20), the risk of particles (including particles during production process and particles during pressure relief of the battery cell 21) falling between the substrate 31 and the adjacent battery cell assembly 20 can be effectively reduced, the risk of insulation failure between the thermal management component 30 and the battery cell assembly 20 due to particles falling therebetween can be effectively reduced; and in the case that the bottom sides of both the battery cell assembly 20 and the thermal management component 30 are fixed to the box body 10 by structural adhesive bonding in the direction of gravity, the thermal management component 30 and the adjacent battery cell assembly 20 can not need to be pasted with a blocking adhesive tape on the bottom sides in the direction of gravity, the risk of structural adhesive overflowing between the substrate 31 and the adjacent battery cell assembly 20 can be effectively reduced, and the risk of the battery cell 21 swelling being blocked due to the structural adhesive overflowing at the large surface 211 of the battery cell, causing the battery cell 21 to fail such as lithium precipitation, can be reduced.

[0069] Based on the insulation property of the substrate 31, the substrate 31 will be in direct insulation contact with the adjacent battery cell assembly 20, without the need to add an insulation film on the side of the substrate 31 facing the adjacent battery cell assembly 20, even if there are particles between the substrate 31 and the adjacent battery cell assembly 20, the particles will be embedded in the substrate 31 and contained and insulated by the substrate 31, and the risk of the particles piercing the substrate 31 and causing insulation failure can be effectively reduced.

[0070] In summary, in the battery device 1 provided by the embodiments of the present application, the heat management component 30 can be elastically abutted against and heat-exchangeably connected to the adjacent battery monomer assembly 20 through the base body 31, and the flow channel for the heat exchange medium can be provided by the heat exchange pipe 32 embedded in at least most of the base body 31, so that the heat exchange medium flowing in the heat exchange pipe 32 can exchange heat with the adjacent battery monomer assembly 20 through the heat exchange pipe 32 and the base body 31, and the heat exchange area is large, thereby maintaining and improving the heat exchange effect and heat exchange efficiency between the heat management component 30 and the adjacent battery monomer assembly 20, and maintaining and improving the heat management performance of the heat management component 30. On this basis, the heat management component 30 can be elastically abutted against and insulatedly contacted to the adjacent battery monomer assembly 20 through the base body 31, so as to seal the gap between the base body 31 and the adjacent battery monomer assembly 20. Based on this, on the one hand, the risk of particles falling between the base body 31 and the adjacent battery monomer assembly 20 can be effectively reduced, and even if particles fall between the base body 31 and the adjacent battery monomer assembly 20, the particles can be insulatedly wrapped by the base body 31 to reduce the risk of insulation failure caused by the particles piercing the base body 31, thereby effectively reducing the risk of insulation failure between the heat management component 30 and the battery monomer assembly 20 due to particles falling therebetween. On the one hand, in the case that the bottom sides of the battery monomer assembly 20 and the heat management component 30 in the gravity direction are fixed to the box body 10 by structural adhesive bonding, the risk of structural adhesive overflow between the base body 31 and the adjacent battery monomer assembly 20 can be reduced, and the risk of lithium precipitation of the battery monomer 21 caused by the structural adhesive overflow to the large surface 211 of the battery monomer can be reduced. On the one hand, it is not necessary to additionally provide an insulating film on the side of the base body 31 facing the adjacent battery monomer assembly 20, it is not necessary to coat silicone adhesive on the top side and the bottom side of the heat management component 30 and the adjacent battery monomer assembly 20 in the gravity direction, and it is not necessary to paste a glue blocking strip on the bottom side of the heat management component 30 and the adjacent battery monomer assembly 20 in the gravity direction, thereby saving insulating film pasting equipment, silicone adhesive coating equipment, glue blocking strip pasting equipment and other equipment in the production process, and reducing material cost and equipment cost and other manufacturing costs.

[0071] As Figure 2 , Figure 4 , Figure 5As shown, in some embodiments, the battery device 1 comprises a current collector 40, which is located at the same side of each thermal management component 30 and connects the heat exchange pipes 32 of each thermal management component 30, i.e. the heat exchange pipes 32 of each thermal management component 30 are connected in parallel to the current collector 40, which can be used to collect the flow of the heat exchange medium. Among them, one or more current collectors 40 can be set as needed, for example, two current collectors 40 can be set, one of which is used to collect the inflow of the heat exchange medium and distribute the heat exchange medium to the heat exchange pipes 32 of each thermal management component 30, and the other is used to collect the outflow of the heat exchange medium from the heat exchange pipes 32 of each thermal management component 30; for example, three current collectors 40 can be set, two of which are used to collect the inflow of the heat exchange medium and the other is used to collect the outflow of the heat exchange medium, or one of the three current collectors 40 is used to collect the inflow of the heat exchange medium and the other two are used to collect the outflow of the heat exchange medium; and so on. Among them, the connection between the heat exchange pipe 32 and the current collector 40 can be achieved by, but not limited to, plug-in connection.

[0072] Please refer to Figure 2 、 Figure 4 、 Figure 5 、 Figure 6 In some embodiments of the present application, the heat exchange pipe 32 comprises a first inlet and outlet section 321, a heat exchange section 322 and a second inlet and outlet section 323 connected in sequence, and the heat exchange section 322 is embedded in the inside of the base body 31; along the direction perpendicular to the first direction x, the first inlet and outlet section 321 and the second inlet and outlet section 323 extend from at least one side of the base body 31.

[0073] It should be noted that the heat exchange section 322, as the majority of the heat exchange pipe 32, is embedded in the inside of the base body 31. The heat exchange section 322 can be arranged in a straight line inside the base body 31, or can be arranged in a curved line, or can be arranged in a broken line. The first inlet and outlet section 321 is connected to one end of the heat exchange section 322 and is used to flow into the heat exchange medium, and the second inlet and outlet section 323 is connected to the other end of the heat exchange section 322 and is used to flow out of the heat exchange medium.

[0074] Along the direction perpendicular to the first direction x, the first inlet and outlet section 321 and the second inlet and outlet section 323 can extend from the same side of the base body 31, or from different sides (for example, adjacent two sides or opposite two sides) of the base body 31. That is, in addition to the two opposite sides of the base body 31 along the first direction x, the first inlet and outlet section 321 and the second inlet and outlet section 323 can extend from the other sides of the base body 31 respectively. In this way, the arrangement space of the battery monomer assembly 20 along the first direction x can be avoided, and the connection of the first inlet and outlet section 321 with the current collector 40 and the connection of the second inlet and outlet section 323 with another current collector 40 are facilitated.

[0075] By adopting the above scheme, the heat exchange pipe 32 can be embedded in the inside of the base body 31 through the heat exchange section 322, so that most of the heat exchange pipe 32 is in full contact with the base body 31, thereby the heat exchange area between the heat exchange medium and the base body 31 can be increased, and the elastic abutment and heat exchange connection of the base body 31 and the adjacent battery monomer assembly 20 can be matched, so as to optimize the heat exchange effect and efficiency between the heat management component 30 and the adjacent battery monomer assembly 20. On this basis, the heat exchange pipe 32 can avoid the arrangement space of the battery monomer assembly 20 along the first direction x, and through the first access section 321 and the second access section 323 extending from the side of the base body 31, the heat exchange pipe 32 can be conveniently and reliably connected to other pipelines (such as the current collector 40) in the side space of the battery monomer assembly 20, so as to optimize the overall pipeline layout, facilitate the smooth entry and circulation of the heat exchange medium, and improve the compactness of the internal structure of the battery device 1.

[0076] Of course, in other embodiments, at least one of the first access section 321 and the second access section 323 can not extend from the base body 31, but can be exposed on the side surface of the base body 31 or communicated to the outside of the base body 31 through a hole, so as to facilitate the connection with other pipelines (such as the current collector 40).

[0077] Please refer to Figure 2 , Figure 4 , Figure 5 , Figure 6 In some embodiments of the present application, the first access section 321 and the second access section 323 extend from opposite sides of the base body 31 along the extension direction of the base body 31.

[0078] It should be noted that the extension direction of the base body 31 is perpendicular to the first direction x and substantially corresponds to the second direction y. Along the extension direction of the base body 31, the first access section 321 and the second access section 323 extend from opposite sides of the base body 31, i.e. the first access section 321 extends from one side of the base body 31, and the second access section 323 extends from the other side of the base body 31.

[0079] By adopting the above scheme, the first inlet and outlet section 321 and the second inlet and outlet section 323 are respectively extended from the opposite sides of the base body 31 along the extension direction of the base body 31, so that a "through type" flow channel layout can be formed, the heat exchange medium can flow from the first inlet and outlet section 321 on one side of the base body 31 to the second inlet and outlet section 323 on the other side of the base body 31, and the heat exchange medium can flow through and cover most of the area of the base body 31, thereby significantly improving the heat exchange uniformity and heat exchange effect between the heat management component 30 and the battery monomer assembly 20. Moreover, the first inlet and outlet section 321 and the second inlet and outlet section 323 can be dispersedly arranged, the space for connecting the pipelines can be dispersed, the first inlet and outlet section 321 on one side of the base body 31 can be connected to other pipelines (such as the current collector 40), and the second inlet and outlet section 323 on the other side of the base body 31 can be connected to other pipelines (such as the current collector 40), thereby reducing the interference risk during the pipeline connection operation, improving the assembly convenience and assembly efficiency, and improving the regularity, rationality and compactness of the overall structure of the battery device 1.

[0080] Of course, in other embodiments, the first inlet and outlet section 321 and the second inlet and outlet section 323 can be extended from the same side of the base body 31, or the first inlet and outlet section 321 and the second inlet and outlet section 323 can be respectively extended from adjacent sides of the base body 31.

[0081] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the heat exchange section 322 is bent.

[0082] It should be noted that the heat exchange section 322 can be bent inside the base body 31, for example, can be bent in the shape of "U", "S" or "Z".

[0083] By adopting the above scheme, the heat exchange section 322 buried inside the base body 31 can be bent, so as to efficiently utilize the limited space inside the base body 31, effectively increase the extension length of the flow channel, and effectively prolong the extension path of the flow channel, thereby expanding the heat exchange range and heat exchange area between the heat exchange section 322 and the heat exchange medium flowing therein and the base body 31 on the basis of improving the space utilization rate inside the heat management component 30, reducing the local heat exchange blind area, and optimizing the heat exchange effect and heat exchange efficiency between the heat management component 30 and the adjacent battery monomer assembly 20.

[0084] Of course, in other embodiments, the heat exchange section 322 can be arranged in a straight line inside the base body 31.

[0085] Please refer to Figure 2 , Figure 5 , Figure 7In some embodiments of the present application, the thickness of the base 31 along the first direction x is H, the outer diameter dimension of the heat exchange pipe 32 along the first direction x is D, h = (H-D) / 2, and h ranges from 0.5 mm to 2 mm.

[0086] It should be noted that the thickness of the base 31 along the first direction x is H, the outer diameter dimension of the heat exchange pipe 32 along the first direction x is D, H>D, and both can be in millimeters (mm) and can be measured by a vernier caliper. h = (H-D) / 2, h can reflect: along the first direction x, the thickness of the part of the base 31 located on the side outside the heat exchange pipe 32. h ranges from 0.5 mm to 2 mm, i.e., 0.5 mm≤h≤2 mm, for example, h can be 0.5 mm, 0.6 mm, 0.7 mm, 0.8 mm, 0.9 mm, 1 mm, 1.1 mm, 1.2 mm, 1.3 mm, 1.4 mm, 1.5 mm, 1.6 mm, 1.7 mm, 1.8 mm, 1.9 mm, 2 mm, etc. As an example, the thickness of the base 31 along the first direction x (i.e., H) can be 5.4 mm, the outer diameter dimension of the heat exchange pipe 32 along the first direction x (i.e., D) can be 4 mm, and the inner diameter dimension of the heat exchange pipe 32 along the first direction x can be 3 mm, h = (5.4-4) / 2 = 0.7 mm, i.e., along the first direction x, there is a part of the base 31 with a thickness of 0.7 mm outside the heat exchange pipe 32. Of course, in actual application scenarios, H and D can be set according to the cooling effect and protection requirements.

[0087] By adopting the above scheme, the thickness of the base 31 along the first direction x located on the side outside the heat exchange pipe 32 (i.e., h) can be controlled in a reasonable range of 0.5 mm to 2 mm, so as to promote the base 31 to form a uniform and sufficient heat-conducting and insulating elastic layer outside the heat exchange pipe 32 along the first direction x. Based on this, it can not only promote the base 31 to tightly and elastically abut against the battery monomer assembly 20 and maintain excellent heat exchange contact, but also, in the case that particles are sandwiched between the base 31 and the battery monomer assembly 20, the sufficient thickness of the insulating material can accommodate and wrap the particles, thereby reducing the risk of insulation failure caused by the particles piercing the base 31, especially, reducing the risk of insulation failure caused by the particles piercing the part of the base 31 located outside the heat exchange pipe 32 along the first direction x, resulting in the heat exchange pipe 32 and the battery monomer assembly 20.

[0088] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the base 31 is bonded to the adjacent battery monomer assembly 20.

[0089] It should be noted that the base body 31 elastically abuts and is bonded to the adjacent battery monomer assembly 20. As an example, the side of the base body 31 facing the adjacent battery monomer assembly 20 can be bonded to the adjacent battery monomer assembly 20 by a back adhesive.

[0090] By adopting the above scheme, by bonding the base body 31 to the adjacent battery monomer assembly 20, the connection stability, connection reliability, and adhesion between the thermal management component 30 and the adjacent battery monomer assembly 20 can be strengthened, the base body 31 can be closely attached to the large face 211 of the battery monomer, the contact thermal resistance can be significantly reduced, and the heat exchange efficiency and thermal management stability can be effectively improved in cooperation with the heat exchange pipe 32 embedded in the base body 31. Moreover, a double seal can be formed between the base body 31 and the adjacent battery monomer assembly 20 based on elastic abutment and bonding fixation, so as to basically block the path of particles and structural glue entering between the base body 31 and the adjacent battery monomer assembly 20, greatly reduce the risk of insulation failure between the thermal management component 30 and the battery monomer assembly 20 due to particles falling therebetween, and greatly reduce the risk of the battery monomer 21 swelling and causing lithium precipitation and other failures due to structural glue overflow to the large face 211 of the battery monomer.

[0091] Of course, in other embodiments, the base body 31 can elastically abut the adjacent battery monomer assembly 20 without being bonded.

[0092] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the base body 31 is a rubber piece.

[0093] It should be noted that the base body 31 is a rubber piece, i.e., the base body 31 adopts a rubber material. In some embodiments, the base body 31 can adopt a composite material, which takes silicone rubber as a base material and adds ceramic particles such as boron nitride, aluminum oxide, and glass fiber reinforced materials.

[0094] By adopting the above scheme, by adopting a rubber material for the base body 31, the base body 31 can have high elasticity, good thermal conductivity, and insulation of rubber, so as to optimize the thermal conductivity, insulation performance, and elasticity of the base body 31.

[0095] Of course, in other embodiments, on the basis that the base body 31 is a thermally conductive and insulating elastic piece, the specific material of the base body 31 can be set as needed.

[0096] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the base body 31 is an injection molding structure, and the heat exchange pipe 32 is insert molded in the base body 31.

[0097] It should be noted that the base body 31 is formed by injection molding, and the heat exchange pipe 32 is embedded in the inside of the base body 31 by insert molding during the injection molding.

[0098] By adopting the above scheme, by making the base body 31 an injection molding structure and the heat exchange pipe 32 insert molded in the base body 31, the base body 31 and the heat exchange pipe 32 can form a stable integrated structure, which can improve the connection reliability and structural integrity between the base body 31 and the heat exchange pipe 32, and can basically avoid the risk of heat exchange failure and insulation damage due to loosening, displacement, and falling of the heat exchange pipe 32 relative to the base body 31, reduce the contact gap and thermal resistance between the heat exchange pipe 32 and the base body 31, and promote the heat of the heat exchange medium to be efficiently transferred to the base body 31 through the heat exchange pipe 32 and then quickly conducted to the battery monomer assembly 20, thereby optimizing the heat exchange efficiency between the heat management component 30 and the battery monomer assembly 20. Moreover, the integrated molding process can eliminate the need for additional assembly and fixing steps, simplify the production process of the heat management component 30, reduce processing errors and manufacturing costs, and improve the production efficiency and economy of the battery device 1.

[0099] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the heat exchange pipe 32 includes a round pipe section.

[0100] It should be noted that the heat exchange pipe 32 of at least one heat management component 30 can be provided with a round pipe section. The heat exchange pipe 32 can be a whole round pipe section or a partial round pipe section. The round pipe section is a pipe section with a circular cross section, wherein the "cross section" is a cross section perpendicular to the central axis of the pipe section.

[0101] Since the pressure can be evenly directed from the center to the circumference on any cross section of the round pipe section, the pressure on the pipe wall of the round pipe section is relatively balanced, and therefore, by adopting the above scheme, the at least round pipe section of the heat exchange pipe 32 has better pressure resistance, thereby improving the use reliability and service life of the heat exchange pipe 32. Since the bending of the round pipe section is simple and convenient, by adopting the above scheme, the at least round pipe section of the heat exchange pipe 32 is convenient for bending, thereby improving the processing convenience and layout flexibility of the heat exchange pipe 32.

[0102] Please refer to Figure 2 , Figure 5 , Figure 6 In some embodiments of the present application, the heat exchange pipe 32 includes a flat pipe section.

[0103] It should be noted that the heat exchange pipe 32 of the at least one heat management component 30 can be provided with a flat pipe section. The heat exchange pipe 32 can be a flat pipe section as a whole or a flat pipe section in part. The flat pipe section is a pipe section with a cross section shape being flat. The cross section is a cross section perpendicular to the central axis of the pipe section. The flat shape includes a shape being relatively flat compared with a circular shape, such as an elliptical shape, a waist shape, a rectangular shape, a trapezoidal shape, etc. In some embodiments, the flat pipe section can be processed by flattening a round pipe section, for example, if the heat exchange pipe 32 including the flat pipe section is a flat pipe section as a whole, the heat exchange pipe 32 can be first formed as a round pipe section as a whole, then bent according to the layout requirement, and then flattened as a whole to form the flat pipe section.

[0104] By adopting the above scheme, compared with a round pipe section, since the flat pipe section can have a smaller outer diameter dimension along the first direction x, the flat pipe section can be embedded by using less base body 31, so that the material amount of the base body 31 can be reduced to reduce the cost, and the overall volume of the heat management component 30 along the first direction x can be reduced, which can promote the compactness and integration of the battery device 1, and is beneficial to improving the space utilization and energy density of the battery device 1. Moreover, compared with a round pipe section, the flat pipe section has a larger contact area with the base body 31, so that the heat of the heat exchange medium can be efficiently transferred to the base body 31 and then quickly conducted to the battery monomer assembly 20, thereby optimizing the heat exchange effect and efficiency between the heat management component 30 and the battery monomer assembly 20.

[0105] It should be noted that the embodiment of “the heat exchange pipe 32 including a round pipe section” and the embodiment of “the heat exchange pipe 32 including a flat pipe section” can be provided alternatively or in combination.

[0106] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the heat management component 30 and the battery monomer assembly 20 are arranged alternately along the first direction x.

[0107] It should be noted that the heat management component 30 and the battery monomer assembly 20 are arranged alternately along the first direction x, that is, along the first direction x, the heat management component 30 and the battery monomer assembly 20 can be arranged alternately in the manner of “heat management component 30, battery monomer assembly 20, heat management component 30……” or in the manner of “battery monomer assembly 20, heat management component 30, battery monomer assembly 20……”, that is, the battery monomer assembly 20 and the heat management component 30 are arranged one by one.

[0108] By adopting the above scheme, and by alternating the thermal management component 30 and the battery cell assembly 20 along the first direction x, each battery cell assembly 20 can efficiently exchange heat with the thermal management component 30 on both sides along the first direction x, thereby achieving comprehensive and uniform heat exchange coverage and improving the consistency and efficiency of overall thermal management. Furthermore, the alternating arrangement allows for a tight fit between any adjacent thermal management components 30 and the battery cell assembly 20, completely sealing the gaps between each group of adjacent thermal management components 30 and the battery cell assembly 20. This significantly reduces the risk of insulation failure caused by particles falling between the thermal management components 30 and the battery cell assembly 20. It also significantly reduces the risk of battery cell 21 failing due to obstructed expansion caused by structural adhesive overflow onto the large surface 211 of the battery cell, leading to lithium plating and other failures. It eliminates the need for additional insulating films, silicone sealants, and adhesive strips, and eliminates the need for equipment such as insulating film application equipment, silicone sealant coating equipment, and adhesive strip application equipment in the production process, thus significantly reducing manufacturing costs such as material and equipment costs.

[0109] Please see Figure 8 , Figure 3 In some embodiments of this application, the battery device 1 includes a battery unit 100, which includes a battery cell assembly 20, a heat insulation pad 50 and another battery cell assembly 20 arranged sequentially along a first direction x. The thermal management component 30 and the battery unit 100 are alternately arranged along the first direction x.

[0110] It should be noted that the battery cell 100 includes a heat insulation pad 50 and two adjacent battery cell assemblies 20 separated by the heat insulation pad 50 (but not by the thermal management component 30). The heat insulation pad 50 is used to separate the two adjacent battery cell assemblies 20 and provides heat insulation and auxiliary protection functions.

[0111] The thermal management component 30 and the battery unit 100 are alternately arranged along the first direction x. That is, along the first direction x, the thermal management component 30 and the battery unit 100 can be arranged alternately in the manner of "thermal management component 30, battery unit 100 (i.e., two battery cell assemblies 20 and the heat insulation pad 50 disposed between the two battery cell assemblies 20), thermal management component 30..." or "battery unit 100, thermal management component 30, battery unit 100...". In other words, the battery unit 100 and the thermal management component 30 are arranged alternately, and the battery cell assembly 20 and the thermal management component 30 are arranged alternately.

[0112] By adopting the above scheme, the battery cells 100 and the thermal management components 30 can be arranged one by one, and the battery monomer assemblies 20 and the thermal management components 30 can be arranged two by one. Based on this, one side of each battery monomer assembly 20 along the first direction x can be in efficient heat exchange with the thermal management component 30, and the other side of each battery monomer assembly 20 along the first direction x can be thermally isolated from the adjacent battery monomer assembly 20 via the heat insulation pad 50, so that the effect and efficiency of overall thermal management can be maintained. Moreover, the gap between the thermal management component 30 and the battery cell 100 can still be sealed by the elastic abutment of the base body 31, and in the case that the heat insulation pad 50 has insulation and elastic properties, the gap between the battery monomer assembly 20 of the battery cell 100 and the heat insulation pad 50 can also be sealed by the elastic abutment of the heat insulation pad 50, so that the entry path of particles and structural glue can be basically blocked, the risk of insulation failure can be greatly reduced, the risk of expansion of the battery monomer 21 being blocked due to the overflow of structural glue to the large surface 211 of the battery monomer, and the risk of lithium precipitation of the battery monomer 21 can be greatly reduced. Additional insulation film, silicone glue, and glue blocking strip structures can not be required, insulation film gluing equipment, silicone glue coating equipment, and glue blocking strip gluing equipment can not be required in the production process, and the material cost and equipment cost can be greatly reduced.

[0113] Of course, in other embodiments, along the first direction x, the battery monomer assembly 20 and the thermal management component 30 can adopt other layout modes, for example, the battery monomer assembly 20 and the thermal management component 30 can be arranged three by one, and the like.

[0114] Please refer to Figure 2 , Figure 3 , Figure 4 In some embodiments of the present application, the battery monomer assembly 20 includes a plurality of battery monomers 21 arranged in sequence along the second direction y, and the second direction y is perpendicular to the first direction x.

[0115] It should be noted that the battery monomer assembly 20 includes a plurality of battery monomers 21, and the plurality of battery monomers 21 of the battery monomer assembly 20 are arranged in sequence along the second direction y to form a row.

[0116] By adopting the above scheme, by arranging the plurality of battery monomers 21 in sequence along the second direction y perpendicular to the first direction x to form the battery monomer assembly 20, the integration and intensive layout of the battery monomers 21 can be realized to improve the space utilization, each large face 211 of the battery monomer can be in efficient heat exchange with the heat management component 30 to promote the heat exchange coverage without dead angle, and each battery monomer 21 of the battery monomer assembly 20 can be in elastic abutment sealing with the base body 31 of the heat management component 30 to effectively block the particle falling and structure glue overflow. Therefore, the space utilization, energy density, heat management consistency, heat management efficiency, use reliability and production economy of the battery device 1 can be improved.

[0117] Please refer to Figure 2 、 Figure 3 、 Figure 4 、 Figure 5 、 Figure 6 、 Figure 7 , and in combination with some embodiments described above, the embodiments of the present application provide a specific example of a battery device 1. The battery device 1 includes a box body 10, and a battery monomer assembly 20 and a heat management component 30 arranged in the box body 10. The heat management component 30 and the battery monomer assembly 20 are arranged side by side and alternately arranged along the first direction x. The battery monomer assembly 20 includes a plurality of battery monomers 21 arranged in sequence along the second direction y, and the heat management component 30 is in heat exchangeable connection with the large face 211 of the battery monomer, wherein the second direction y is perpendicular to the first direction x, the first direction x is perpendicular to the large face 211 of the battery monomer, and the large face 211 of the battery monomer is the largest face among the various side faces of the battery monomer 21.

[0118] The heat management component 30 includes a base body 31 and a heat exchange pipe 32. The heat exchange pipe 32 is basically a circular pipe segment, and the inner space of the heat exchange pipe 32 forms a flow channel for the flow of heat exchange medium. The heat exchange pipe 32 includes a first inlet and outlet segment 321, a heat exchange segment 322 and a second inlet and outlet segment 323 connected in sequence, the heat exchange segment 322 is bent and embedded in the inside of the base body 31, and the first inlet and outlet segment 321 and the second inlet and outlet segment 323 respectively extend from the opposite sides of the base body 31 along the extension direction thereof, wherein the extension direction of the base body 31 is perpendicular to the first direction x and parallel to the second direction y.

[0119] The base body 31 is a rubber part, which has heat conduction performance, insulation performance and elastic performance, and the base body 31 is in elastic abutment and bonding with the adjacent battery monomer assembly 20. The base body 31 is formed by injection molding, and the heat exchange pipe 32 is insert molded in the base body 31. The thickness of the base body 31 along the first direction x is H, the outer diameter dimension of the heat exchange pipe 32 along the first direction x is D, h=(H-D) / 2, and the range of h is 0.5mm~2mm.

[0120] Based on the above arrangement, the heat management component 30 can be in elastic abutment and heat exchange connection with the adjacent battery monomer assembly 20 through the base 31, and the flow channel for the heat exchange medium can be provided by the heat exchange pipe 32 embedded in the base 31 at least in most part, so that the heat exchange medium flowing in the heat exchange pipe 32 can exchange heat with the adjacent battery monomer assembly 20 through the heat exchange pipe 32 and the base 31, and the heat exchange area is large, so that the heat exchange effect and efficiency between the heat management component 30 and the adjacent battery monomer assembly 20 can be maintained and improved, and the heat management performance of the heat management component 30 can be maintained and improved.

[0121] On this basis, the heat management component 30 can be in elastic abutment and insulation contact with the adjacent battery monomer assembly 20 through the base 31, and the gap between the base 31 and the adjacent battery monomer assembly 20 can be sealed. Based on this, on the one hand, the risk of particles falling between the base 31 and the adjacent battery monomer assembly 20 can be effectively reduced, and even if particles fall between the base 31 and the adjacent battery monomer assembly 20, the particles can be contained and insulated by the base 31 to reduce the risk of insulation failure caused by the particles piercing the base 31, thereby effectively reducing the risk of insulation failure between the heat management component 30 and the battery monomer assembly 20 due to particles falling therebetween. On the one hand, in the case where the bottom sides of the battery monomer assembly 20 and the heat management component 30 in the gravity direction are fixed to the box body 10 by structural adhesive bonding, the risk of structural adhesive overflow between the base 31 and the adjacent battery monomer assembly 20 can be reduced, and the risk of lithium precipitation of the battery monomer 21 caused by the structural adhesive overflow to the large surface 211 of the battery monomer can be reduced. On the one hand, it is not necessary to add an insulating film to the side of the base 31 facing the adjacent battery monomer assembly 20, it is not necessary to coat silicone adhesive on the top side and the bottom side of the heat management component 30 and the adjacent battery monomer assembly 20 in the gravity direction, and it is not necessary to paste a glue blocking strip on the bottom side of the heat management component 30 and the adjacent battery monomer assembly 20 in the gravity direction. The production process can save equipment such as insulating film pasting equipment, silicone adhesive coating equipment, and glue blocking strip pasting equipment, thereby reducing material cost and equipment cost and other manufacturing costs.

[0122] Please refer to Figure 1 , Figure 2 Some embodiments of the present application provide a power consuming device comprising the battery device 1 provided by the embodiments of the present application.

[0123] By adopting the above scheme, the power consuming device can improve the use reliability, operation reliability, operation stability and service life of the power consuming device by applying the battery device 1 provided by the embodiments of the present application.

[0124] The above merely provides optional embodiments of the present application, but not for limiting the present application. For those skilled in the art, the present application can have various modifications and changes. Any modifications, equivalent replacements, improvements, etc., made within the principles and technical scope of the present application, should be included in the scope of the claims of the present application.

Claims

1. A battery device, characterized in that, include: Box; A battery cell assembly is disposed within the housing. The battery cell assembly includes at least one battery cell, and the side with the largest area among the various sides of the battery cell is the large side of the battery cell. A thermal management component is disposed within the housing and arranged side-by-side with the battery cell assembly along a first direction perpendicular to the large surface of the battery cell. The thermal management component is heat-exchangeably connected to the large surface of the battery cell. The thermal management component includes a substrate and a heat exchange tube. At least a portion of the heat exchange tube is embedded inside the substrate. The substrate is a thermally conductive, insulating, and elastic element. The substrate elastically abuts against the adjacent battery cell assembly.

2. The battery device as claimed in claim 1, characterized in that, The heat exchange tube includes a first inlet / outlet section, a heat exchange section, and a second inlet / outlet section connected in sequence. The heat exchange section is embedded inside the substrate. The first inlet / outlet section and the second inlet / outlet section extend from at least one side of the substrate along a direction perpendicular to the first direction.

3. The battery device as claimed in claim 2, characterized in that, The first inlet / outlet section and the second inlet / outlet section extend from opposite sides of the substrate along its extension direction.

4. The battery device as claimed in claim 2, characterized in that, The heat exchange section is bent.

5. The battery device as claimed in claim 1, characterized in that, The thickness of the substrate along the first direction is H, the outer diameter of the heat exchange tube along the first direction is D, h = (HD) / 2, and the range of h is 0.5mm~2mm.

6. The battery device as claimed in claim 1, characterized in that, The substrate is bonded to the adjacent battery cell assembly.

7. The battery device according to any one of claims 1-6, characterized in that, The substrate is a rubber component.

8. The battery device according to any one of claims 1-6, characterized in that, The substrate is an injection-molded structure, and the heat exchange tube insert is formed on the substrate.

9. The battery device according to any one of claims 1-6, characterized in that, The heat exchange tubes consist of circular tube sections.

10. The battery device according to any one of claims 1-6, characterized in that, The heat exchange tube includes a flat tube section.

11. The battery device according to any one of claims 1-6, characterized in that, The thermal management component and the battery cell assembly are alternately arranged along the first direction.

12. The battery device according to any one of claims 1-6, characterized in that, The battery device includes a battery cell, which includes the battery cell assembly, a heat insulation pad, and another battery cell assembly arranged sequentially along the first direction. The thermal management component and the battery cell are alternately arranged along the first direction.

13. The battery device according to any one of claims 1-6, characterized in that, The battery cell assembly includes a plurality of battery cells arranged sequentially along a second direction, which is perpendicular to the first direction.

14. An electrical appliance, characterized in that, Includes the battery device as described in any one of claims 1-13.

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