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 device comprises a box body, a battery monomer assembly arranged in the box body and a heat management component, the heat management component is used for exchanging heat with the battery monomer assembly and comprises a heat exchange pipe, a current collecting component and a conductive part, and the heat exchange pipe is a metal part; the flow collecting component is connected to the end of the heat exchange pipe so that the heat exchange medium can circulate between the heat exchange pipe and the flow collecting component. And the conductive piece is fixed on the current collecting part and is connected with the heat exchange tube and the box body. According to the battery device provided by the embodiment of the invention, the heat exchange tube and the box body are connected through the conductive piece, so that the reliability of the battery device is improved.

Description

[0001] This application refers to Chinese Patent Application No. 202410501046.5, filed on April 24, 2024, entitled “Thermal Management Component and Manufacturing Process Thereof, Battery, and Electric Device”, and Chinese Patent Application No. 202420869133.1, filed on April 24, 2024, entitled “Thermal Management Component, Battery, and Electric Device”, which are incorporated by reference in their entirety. TECHNICAL FIELD

[0002] The present application relates to the technical field of batteries, and in particular to a battery device and an electric device. BACKGROUND

[0003] Energy saving and emission reduction are the key to the sustainable development of the automobile industry. Electric vehicles have become an important part of the sustainable development of the automobile industry due to their energy-saving and environmentally friendly advantages. For electric vehicles, battery technology is an important factor for their development.

[0004] In the development of battery technology, how to improve the reliability of the battery is an important research direction in battery technology. Practical new type content

[0005] Therefore, the embodiments of the present application provide a battery device and an electric device, which can improve the reliability of the battery device.

[0006] The embodiments of the first aspect of the present application provide a battery device, comprising: a box body; a battery monomer assembly arranged in the box body; a thermal management component arranged in the box body and used for heat exchange with the battery monomer assembly, the thermal management component comprising a heat exchange pipe, a current collecting component, and an electrically conductive piece, the heat exchange pipe being a metal piece, the current collecting component being connected to an end of the heat exchange pipe to enable a heat exchange medium to flow between the heat exchange pipe and the current collecting component; and the electrically conductive piece being fixed to the current collecting component and connecting the heat exchange pipe and the box body.

[0007] In the battery device provided by the embodiments of the present application, the thermal management component comprises the heat exchange pipe and the current collecting component, and the heat exchange medium can flow between the heat exchange flow channel and the current collecting component, so that the thermal management component can exchange heat with the battery monomer assembly, enabling the battery monomer assembly to operate at a relatively safe temperature and improving the operating stability of the battery device; the thermal management component further comprises the electrically conductive piece, which can simultaneously connect the heat exchange pipe and the box body, so that the heat exchange pipe and the box body can be electrically connected through the electrically conductive piece to reduce the potential difference between the heat exchange pipe and the box body, so as to facilitate the equipotential connection between the heat exchange pipe and the box body and improve the reliability of the battery device.

[0008] In some embodiments, the electrically conductive piece is clamped to the current collecting component.

[0009] By adopting the technical scheme, the conductive piece can be quickly installed on the current collecting component, the assembly efficiency is high, the connection between the conductive piece and the current collecting component is stable, the conductive piece is not easy to fall off, and the risk of equipotential failure between the heat exchange pipe and the tank is reduced.

[0010] In some embodiments, the conductive piece is connected to the heat exchange pipe in an interference fit.

[0011] By adopting the technical scheme, the conductive piece can be connected to the heat exchange pipe under a certain pressure, the connection stability between the conductive piece and the heat exchange pipe is improved, and the reliability of the equipotential connection between the heat exchange pipe and the tank is improved.

[0012] In some embodiments, the current collecting component includes a current collector and an adapter sleeve, the adapter sleeve is sleeved on the end of the heat exchange pipe, the current collector is sealingly connected with the adapter sleeve, and the conductive piece is clamped to at least one of the current collector and the adapter sleeve.

[0013] By adopting the technical scheme, the current collector and the adapter sleeve can be tightly connected, the connection stability between the current collector and the heat exchange pipe and the sealing reliability of the thermal management component are improved, and the fixing mode of the conductive piece is flexible and convenient.

[0014] In some embodiments, one side of the adapter sleeve is provided with a clamping groove, the conductive piece includes a conductive body and a bent portion bent to the conductive body, the conductive body is partially clamped in the clamping groove, the conductive body is used for electrically connecting with the tank, and the bent portion is bent from the conductive body towards the heat exchange pipe and abuts against the heat exchange pipe.

[0015] By adopting the technical scheme, the conductive piece can be fixed on the current collecting component by clamping, and the conductive piece is not easy to fall off; the bent portion is bent from the conductive body towards the heat exchange pipe, and the bent portion is convenient to connect with the heat exchange pipe.

[0016] In some embodiments, the clamping groove is recessed in the outer wall of the adapter sleeve away from the heat exchange pipe.

[0017] By adopting the technical scheme, the installation mode of the conductive piece does not easily affect the sealing of the thermal management component, and the reliability of the battery device is improved.

[0018] In some embodiments, the bent portion includes a first section and a second section, one end of the first section is perpendicularly connected with the conductive body, the other end of the first section is perpendicularly connected with the second section, and the second section abuts against the heat exchange pipe.

[0019] By adopting the technical scheme, the bending part of the conductive part is in a bending structure, so as to facilitate the extension of the bending part towards the heat exchange pipe ring and the connection of the bending part with the heat exchange pipe, and further facilitate the interference fit connection between the bending part and the heat exchange pipe.

[0020] In some embodiments, the heat exchange pipe includes two oppositely arranged heat exchange surfaces and two oppositely arranged connecting surfaces, the heat exchange surfaces are arranged opposite to the battery monomer assembly, and each connecting surface is connected between the two heat exchange surfaces; the bending part abuts against the connecting surface.

[0021] By adopting the technical scheme, the conductive part is located outside the current collecting component as a whole, without affecting the sealing property of the thermal management component; the bending part does not block the heat exchange surface, and the heat exchange surface can be attached to the battery monomer assembly to obtain a better thermal management effect.

[0022] In some embodiments, the connecting surface is an arc surface, and the bending part is provided with an arc-shaped groove, which is attached to the connecting surface.

[0023] By adopting the technical scheme, the bending part can be wrapped on the arc-shaped connecting surface, the matching property between the two is good, the connecting area is large, and the connection is stable.

[0024] In some embodiments, the heat exchange pipe extends along a first direction; along the first direction, the clamping groove penetrates through the adapter ring, and the conductive main body is arranged in the clamping groove, the clamping groove includes a groove bottom and two groove walls oppositely arranged and spaced apart along a second direction, the second direction intersects the first direction, the top of the groove wall is provided with a flange extending towards the middle of the clamping groove, and the two sides of the conductive main body are respectively clamped between the flange and the groove bottom.

[0025] By adopting the technical scheme, the connecting area and the connection stability of the conductive part and the clamping groove are improved; and the clamping groove can limit the conductive main body, and the conductive part is not easy to fall off.

[0026] In some embodiments, a first limiting part is arranged in the clamping groove, and a second limiting part is arranged on the conductive part, and the second limiting part is clamped with the first limiting part.

[0027] By adopting the technical scheme, the installation precision of the conductive part is improved.

[0028] In some embodiments, the current collector and the adapter ring are plastic parts.

[0029] The thermal management component provided by the embodiments of the present application includes a conductive part, which solves the problem of electrical connection between the heat exchange pipe and the box body; since the adapter ring is a plastic part, the adapter ring can be wrapped on the heat exchange pipe made of metal by the way of overmolding, and at the same time, the weight and cost of the thermal management component can be reduced.

[0030] In some embodiments, the inner surface of the box is provided with conductive foam, and the conductive part abuts against the conductive foam.

[0031] By adopting the above technical solution, when the conductive part abuts against the conductive foam, the conductive foam can be compressed, which is conducive to the stable connection of the current collecting component and the box and improves the reliability of the conduction between the current collecting component and the box.

[0032] In some embodiments, the number of thermal management components is multiple, and the battery monomer assembly is arranged between two adjacent thermal management components.

[0033] By adopting the above technical solution, the thermal management effect of the battery device is good.

[0034] Embodiments of the second aspect of the present application provide a power utilization device, which comprises the battery device provided in the first aspect, and the battery device is used to provide electric energy.

[0035] The above description is only a summary of the technical solutions of the present application. In order to more clearly understand the technical means of the present application, the embodiments can be implemented according to the content of the specification, and in order to make the above and other purposes, characteristics and advantages of the present application more obvious and easy to understand, the following will describe the specific embodiments of the present application. BRIEF DESCRIPTION OF DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0037] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the present application;

[0038] Figure 2 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0039] Figure 3 is a three-dimensional exploded schematic diagram of a battery monomer provided by an embodiment of the present application;

[0040] Figure 4 is a partial schematic diagram of a battery device provided by an embodiment of the present application;

[0041] Figure 5 is Figure 4 a partial enlarged view of part A in FIG.

[0042] Figure 6 is Figure 4 a structural schematic diagram of a thermal management component and conductive foam in the battery device shown in FIG.

[0043] Figure 7 yes Figure 4 The front view of the thermal management components and conductive foam shown;

[0044] Figure 8 yes Figure 7 A partial schematic diagram of the thermal management components and the conductive foam shown;

[0045] Figure 9 This is an exploded perspective view of the current collection component and conductive sheet provided in an embodiment of this application;

[0046] Figure 10 yes Figure 9 A three-dimensional schematic diagram of the conductive sheet in the middle;

[0047] Figure 11 yes Figure 4 Side view of the thermal management component shown;

[0048] Figure 12 yes Figure 11 The thermal management component shown is a cross-sectional view along line BB.

[0049] Figure 13 yes Figure 12 A magnified view of part C in the middle.

[0050] The markings in the diagram mean:

[0051] 1000, Vehicle; 100, Battery Unit; 200, Controller; 300, Motor; 10, Housing; 11, Upper Housing; 12, Lower Housing; 13, Conductive Foam;

[0052] 20. Battery cell assembly; 21. Battery cell; 211. Housing; 212. End cap; 213. Electrode assembly; 214. Electrode terminal; 215. Pressure relief mechanism;

[0053] 30. Thermal management components;

[0054] 31. Heat exchange tube; 311. Heat exchange surface; 312. Connecting surface;

[0055] 32. Current collector;

[0056] 321. Current collector; 3211. Current collector housing; 3212. Connector;

[0057] 322, Adapter collar; 3221, Slot; 3221a, Slot bottom; 3321b, Slot wall; 3321c, Flange; 3321d, First limiting part; 3222, Hollow cavity;

[0058] 323. Sealing components;

[0059] 33, electrically conductive member; 331, electrically conductive body; 3311, second limiting portion; 332, bent portion; 3321, first section; 3322, second section; 33221, arc-shaped groove; DETAILED DESCRIPTION

[0060] The embodiments of the present application will be described in detail with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical scheme of the present application, and therefore only serve as examples, but cannot be used to limit the protection scope of the present application.

[0061] 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 belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the use of the terms "include," "includes" and "including" in the description and the claims herein and the above detailed description of the application are intended to be inclusive of aspects that would be considered equivalents by one of ordinary skill in the art.

[0062] In the description of the embodiments of the present application, the technical terms "first", "second", etc. are only used to distinguish different objects, and cannot be understood as indicating or implying relative importance or implicitly indicating the number, specific order or primary and secondary relationship of the indicated technical features. In the description of the embodiments of the present application, the meaning of "multiple" is more than two, unless otherwise explicitly and specifically limited.

[0063] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearance of the phrase in various places in the specification does not necessarily all refer to the same embodiment, nor is it necessarily independent or alternative embodiments to each other. It is explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0064] In the description of the embodiments of the present application, the term "and / or" is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent the three cases of A alone, A and B together, and B alone. In addition, the character " / " in this paper generally represents that the front and rear associated objects are a "or" relationship.

[0065] In the description of the embodiments of the present application, the term "multiple" refers to more than two (including two), and similarly, "multiple groups" refers to more than two groups (including two groups), and "multiple pieces" refers to more than two pieces (including two pieces).

[0066] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connecting", "fixing" and the like should be understood in a broad sense, for example, can be fixed connection, can also be detachable connection, or integral; can be mechanical connection, can also be electrical connection; can be direct connection, can also be indirect connection through an intermediate medium, can be internal communication of two elements or interaction relationship between two elements. For those skilled in the art, the specific meanings of the above terms in the embodiments of the present application can be understood according to the specific circumstances.

[0067] In the embodiments of the present application, the battery cell can be a secondary battery, which refers to a battery cell that can be activated by charging after discharging.

[0068] The battery cell can be a lithium ion battery, a sodium ion battery, a sodium lithium ion battery, a lithium metal battery, a sodium metal battery, a lithium sulfur battery, a magnesium ion battery, a nickel hydrogen battery, a nickel cadmium battery, a lead-acid battery, etc. The embodiments of the present application are not limited thereto.

[0069] The battery apparatus mentioned in the embodiments of the present application can include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly can include a plurality of battery cells connected in series, parallel or mixed connection through a busbar component.

[0070] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0071] As an example, the battery cell assembly can be a battery module, which is formed by arranging and fixing a plurality of battery cells into an independent module. As an example, the battery module can be formed by bundling a plurality of battery cells with a cable tie.

[0072] In some embodiments, the battery apparatus can be a battery pack, which includes a box body and one or more battery cell assemblies, and the battery cell assemblies are accommodated in the box body.

[0073] As an example, the battery cell assembly can be a battery module, which can be accommodated in the box body by fixing the battery module in the box body.

[0074] As an example, the battery cell assembly can also be accommodated in the box body by directly fixing a plurality of battery cells in the box body.

[0075] At present, from the development of market situation, the application of power battery is more and more extensive. The power battery is not only applied to the energy storage power supply system of water power, fire power, wind power and solar power station, but also widely applied to the electric transportation tools such as electric bicycle, electric motorcycle, electric vehicle and other fields. With the continuous expansion of the application field of power battery, the demand of its market is also increasing.

[0076] The battery usually comprises a battery monomer and a box. The battery monomer is placed in the box, and the box can provide accommodation space for the battery monomer and play a certain protection role. For the battery, the battery monomer is the component where the actual electrochemical reaction occurs.

[0077] When the internal electrochemical reaction of the battery monomer occurs, heat will be generated. With the cyclic use of the battery, the battery monomer continuously generates heat, so that the temperature inside the battery gradually rises, affecting the performance of the battery. Therefore, at present, a heat management component is usually arranged in the battery. The heat management component comprises a heat exchange pipe and a current collector. The heat exchange medium flows into the heat exchange pipe through the current collector or the heat exchange medium in the heat exchange pipe flows out of the heat management component through the current collector. The heat exchange medium exchanges heat with the battery monomer in the process of flowing in the heat exchange pipe, so as to cool the battery or heat the battery in a low temperature environment to make it reach the normal working temperature range. However, the heat exchange pipe is usually made of metal material. If there is a large potential difference between the heat exchange pipe and the box, the risk of insulation failure inside the battery will be large, which increases the risk of electric shock caused by battery leakage or short circuit and affects the stability of the battery.

[0078] Based on the above consideration, one or more embodiments of the present application provide a battery device comprising a box, a battery monomer assembly arranged in the box and a heat management component. The heat management component comprises a heat exchange pipe, a current collecting component and a conductive piece. The heat exchange pipe is a metal piece, and the current collecting component is connected to the end of the heat exchange pipe. The conductive piece is fixed on the current collecting component, and the conductive piece connects the heat exchange pipe and the box. In the above battery device, the heat management component can exchange heat with the battery monomer assembly, so that the battery monomer assembly operates at a relatively safe temperature, and the operating stability of the battery device is improved. Moreover, the conductive piece connects the heat exchange pipe and the box, so that the heat exchange pipe and the box can be electrically connected through the conductive piece to reduce the potential difference between the heat exchange pipe and the box, and the reliability of the battery device is improved.

[0079] The technical solutions described in the embodiments of the present application are applicable to various electric devices using battery monomers, such as mobile phones, portable devices, notebook computers, electric bicycles, electric toys, electric tools, vehicles, ships and spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spaceship, etc. In order to facilitate the description, the following embodiments take a vehicle as an example to illustrate the electric device of one embodiment of the present application.

[0080] Please refer toFigure 1 , Figure 1 A structural schematic diagram of a vehicle 1000 is provided for some embodiments of the present application. The vehicle 1000 can be a fuel automobile, a gas automobile, or a new energy automobile, which can be a pure electric vehicle, a hybrid electric vehicle, or a range extended vehicle, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, head or tail of the vehicle 1000. The battery device 100 can be used for power supply of the vehicle 1000, for example, the battery device 100 can be used as an operating power source of the vehicle 1000. The vehicle 1000 can also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to supply power to the motor 300, for example, to meet the power demand of the vehicle 1000 during starting, navigation and driving.

[0081] In some embodiments of the present application, the battery device 100 can not only be used as an operating power source of the vehicle 1000, but also be used as a driving power source of the vehicle 1000, instead of or partially instead of fuel or natural gas to provide driving power for the vehicle 1000.

[0082] Please refer to Figure 1 and Figure 2 The battery device 100 includes a box body 10 and a battery monomer assembly 20. The box body 10 includes an upper box body 11 and a lower box body 12, and the upper box body 11 and the lower box body 12 are mutually covered. The upper box body 11 and the lower box body 12 jointly define a containing space for containing battery monomers. The lower box body 12 can be a hollow structure with one end open, and the upper box body 11 can be a plate structure. The upper box body 11 covers the open side of the lower box body 12, so that the upper box body 11 and the lower box body 12 jointly define the containing space. Alternatively, the upper box body 11 and the lower box body 12 can both be hollow structures with one side open, and the open side of the upper box body 11 covers the open side of the lower box body 12. Of course, the box body 10 formed by the upper box body 11 and the lower box body 12 can have various shapes, such as a cylinder or a cuboid.

[0083] Please refer to Figure 2 The battery monomer assembly 20 is usually formed by arranging a plurality of battery monomers. The battery device 100 further includes a thermal management component 30, which refers to a component arranged in the box body 10 of the battery device 100 and used for containing a heat exchange medium to adjust the temperature of the battery monomer assembly 20 in the box body 10. Heat is generated during the circulation of the battery monomer assembly 20, and the battery monomer assembly 20 can be cooled by the thermal management component 30. At this time, the thermal management component 30 can contain a heat exchange medium, and the thermal management component 30 can also be referred to as a cooling piece, a cooling system, a cooling plate, or a liquid cooling plate, etc. Of course, in some other cases, the thermal management component 30 can also be used to heat the battery monomer assembly 20, which will not be described here.

[0084] Please refer toFigure 2 and Figure 3 The battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence, the battery cell 21 being the smallest unit constituting the battery device 100, the battery cell 21 including a shell 211, an end cover 212, an electrode assembly 213, and other functional components.

[0085] The end cover 212 refers to a component that covers the opening of the shell 211 to isolate the internal environment of the battery cell 21 from the external environment. Without limitation, the shape of the end cover 212 can be adapted to the shape of the shell 211 to fit the shell 211. Alternatively, the end cover 212 can be made of a material with certain hardness and strength, such as aluminum alloy, so that the end cover 212 is less likely to deform when subjected to extrusion and impact, enabling the battery cell 21 to have higher structural strength and improved reliability. The end cover 212 can be provided with functional components such as an electrode terminal 214, a pressure relief mechanism 215, etc. The electrode terminal 214 can be used to electrically connect with the electrode assembly 213 for outputting or inputting the electrical energy of the battery cell 21. In some embodiments, the pressure relief mechanism 215 is used to release the internal pressure when the internal pressure or temperature of the battery cell 21 reaches a threshold value. The material of the end cover 212 can also be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application. In some embodiments, an insulating member can also be provided on the inner side of the end cover 212 to reduce the risk of short circuit. Exemplarily, the insulating member can be plastic, rubber, etc.

[0086] The shell 211 is a component used to fit the end cover 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 shell 211 and the end cover 212 can be independent components, and an opening can be provided on the shell 211, and the end cover 212 is made to cover the opening to form the internal environment of the battery cell 21. Without limitation, the end cover 212 and the shell 211 can also be integrated, specifically, the end cover 212 and the shell 211 can first form a common connecting surface before other components enter the shell, and then the end cover 212 is made to cover the shell 211 when it is necessary to encapsulate the internal environment of the shell 211. The shell 211 can be various shapes and sizes, such as a cuboid, a cylinder, a hexagonal prism, etc. Specifically, the shape of the shell 211 can be determined according to the specific shape and size of the electrode assembly 213. The material of the shell 211 can be various, such as copper, iron, aluminum, stainless steel, aluminum alloy, plastic, etc., which are not specially limited in the embodiments of the present application.

[0087] The electrode assembly 213 is a component in which electrochemical reactions occur in the battery cell 21. One or more electrode assemblies 213 can be contained within the case 211. The electrode assembly 213 is mainly formed by winding or layering a positive electrode sheet and a negative electrode sheet, and a separator is generally provided between the positive electrode sheet and the negative electrode sheet. The positive electrode sheet and the negative electrode sheet have portions with active materials that constitute a main body of the electrode assembly 213, and portions without active materials that each constitute a tab. The positive electrode tab and the negative electrode tab can be located together at one end of the main body or at opposite ends of the main body. During charging and discharging of the battery device 100, the positive electrode active material and the negative electrode active material react with an electrolyte, and the tabs connect the electrode terminal 214 to form a current loop.

[0088] In some embodiments, the battery cell 21 is provided with a pressure relief mechanism 215 on one side, which refers to an element or component that is actuated to release internal pressure when the internal pressure or temperature of the battery cell 21 reaches a predetermined threshold. The threshold value is designed differently according to design requirements. The threshold value can depend on the material of one or more of the positive electrode sheet, the negative electrode sheet, the electrolyte, and the separator in the battery cell 21. The internal pressure of the battery cell 21 is the pressure inside the case 211. The pressure relief mechanism 215 can take the form of a pressure relief valve, a gas valve, a pressure relief valve, or a safety valve, and can specifically take the form of a pressure-sensitive element or structure, i.e., when the internal pressure of the battery cell 21 reaches a predetermined threshold, the pressure relief mechanism 215 performs an action or a weak part provided in the pressure relief mechanism 215 breaks, thereby forming an opening or passage for the internal pressure to be released.

[0089] Please refer to Figure 2 、 Figures 4 to 9 , the first aspect of the embodiment of the present application proposes a battery device 100, comprising a box body 10, a battery cell assembly 20 arranged in the box body 10, and a heat management component 30, the heat management component 30 is used for heat exchange with the battery cell assembly 20, the heat management component 30 comprises a heat exchange pipe 31, a current collecting component 32 and a conductive piece 33, the heat exchange pipe 31 is a metal piece, the current collecting component 32 is connected to the end of the heat exchange pipe 31 to make the heat exchange medium flow between the heat exchange pipe 31 and the current collecting component 32; the conductive piece 33 is fixed on the current collecting component 32, and the conductive piece 33 connects the heat exchange pipe 31 and the box body 10.

[0090] The box body 10 is used to accommodate the battery cell assembly 20 and the heat management component 30, and the number of the battery cell assembly 20 and the heat management component 30 can be multiple.

[0091] The heat exchange pipe 31 is a metal piece, and the cross section of the heat exchange pipe 31 can be a regular shape such as a circle, a rectangle, an ellipse, or other special shapes. The heat exchange pipe 31 is internally provided with a heat exchange flow channel (not shown in the figure), and the number of the heat exchange flow channels can be one or more. The heat exchange flow channels can provide a flow path for the heat exchange medium. The heat exchange pipe 31 is attached to the surface of the battery monomer assembly 20, and when the heat exchange medium flows in the heat exchange flow channel, the heat generated by the battery monomer assembly 20 can be taken away, thereby achieving the cooling of the battery monomer assembly 20. The heat exchange medium can be water, air, coolant, etc.

[0092] In some embodiments, the heat exchange pipe 31 can be a flat tube, and the heat exchange pipe 31 includes a plurality of heat exchange flow channels that can be arranged side by side. When the heat exchange pipe 31 is applied to the battery device 100, the surface of the heat exchange pipe 31 can be used to contact the battery monomer assembly 20, so that the heat exchange pipe 31 has the effect of stabilizing the support, constraint, and deformation resistance of the battery monomer 21.

[0093] In some embodiments, the heat exchange pipe 31 is provided with a current collecting component 32 at both ends, and the current collecting component 32 is internally provided with a current collecting cavity (not shown in the figure), which is in communication with the heat exchange flow channel. The heat exchange medium can circulate unidirectionally in the heat exchange pipe 31, that is, the heat exchange medium can enter from the current collecting component 32 at one end of the heat exchange pipe 31 and then directly discharge from the current collecting component 32 at the other end of the heat exchange pipe 31. Of course, the heat exchange medium can also circulate back and forth multiple times in the heat exchange pipe 31 and then discharge through one current collecting component 32. Since the current collecting component 32 can conduct electricity, the material of the current collecting component 32 can be a non-conductive material or a conductive material, for example, the current collecting component 32 is made of plastic material, and the current collecting component 32 itself does not conduct electricity and cannot be directly connected to the box 10. The heat management component 30 provided in the embodiments of the present application can use the current collecting component 32 to connect the heat exchange pipe 31 and the box 10 to the same potential.

[0094] The conductive piece 33 is a component with the ability to conduct electricity. In some embodiments, the conductive piece 33 is a metal piece, and the material of the conductive piece 33 can be various metals, such as copper, silver, gold, aluminum, etc. with good electrical conductivity. The conductive piece 33 can also be a conductive plastic piece, a composite of metal and plastic, etc. The conductive piece 33 can be a sheet, a block, or other shapes.

[0095] The conductive part 33 is fixed to the current collecting part 32, wherein the conductive part 33 can be partially embedded in the inside of the current collecting part 32, or can be arranged outside the current collecting part 32, as long as the conductive part 33 can be electrically connected with the heat exchange pipe 31 and the box. In some embodiments, the conductive part 33 is connected with the current collecting part 32 in a detachable manner, for example, the conductive part 33 can be connected with the current collecting part 32 by clamping, riveting, screwing or the like, and in another embodiment, the conductive part 33 can be integrally connected with the current collecting part 32, for example, the conductive part 33 is integrally arranged with the current collecting part 32 by injection molding.

[0096] The conductive part 33 connects the heat exchange pipe 31 and the box 10. Since the conductive part 33 is made of conductive material, the conductive part 33 is not only structurally connected with the heat exchange pipe 31 and the box 10, but also electrically connected with the heat exchange pipe 31 and the box 10, that is, the conductive part 33 electrically contacts the heat exchange pipe 31 and the box 10. In this way, the conductive part 33 can be electrically connected with the heat exchange pipe 31 and the box 10.

[0097] For example, one end of the conductive part 33 is connected to the heat exchange pipe 31, and the conductive part 33 can directly contact the outer surface or the inner surface of the heat exchange pipe 31, or can abut against any surface of the heat exchange pipe 31 and achieve electrical connection with the heat exchange pipe 31 through conductive foam or the like. The other end of the conductive part 33 is connected to the box 10, and the conductive part 33 can directly contact the inner wall of the box 10 or the beam in the box 10, or can be electrically connected with the box 10 through conductive foam 13 or the like. In this way, the conductive part 33 can electrically connect the heat exchange pipe 31 and the box 10, so as to reduce the potential difference between the heat exchange pipe 31 and the box, and facilitate the equipotential connection between the heat exchange pipe 31 and the box 10. The equipotential connection can reduce the risk of electric shock and other safety hazards.

[0098] In the battery device 100 provided by the embodiments of the present application, the heat management part 30 includes the heat exchange pipe 31 and the current collecting part 32, and the heat exchange medium can flow between the heat exchange flow channel and the current collecting part 32, so that the heat management part 30 can exchange heat with the battery monomer assembly 20, so as to enable the battery monomer assembly 20 to operate at a relatively safe temperature, and improve the operation stability of the battery device 100; the heat management part 30 further includes the conductive part 33, and the conductive part 33 can be connected with the heat exchange pipe 31 and the box 10 at the same time, so that the heat exchange pipe 31 and the box 10 can be electrically connected through the conductive part 33, so as to reduce the potential difference between the heat exchange pipe 31 and the box 10, and facilitate the equipotential connection between the heat exchange pipe 31 and the box 10, and improve the reliability of the battery device 100.

[0099] In some embodiments, the conductive part 33 is clamped to the current collecting part 32.

[0100] Clamping is a mechanical connection method. Two or more components are connected together through clamping by a special interface design. The components are firmly connected through insertion and clamping by the degree of fit between the interfaces.

[0101] As shown in Figure 6 , the conductive piece 33 can be clamped to the current collecting component 32 through various clamping structures. For example, the conductive piece 33 is provided with a clamping protrusion and the current collecting component 32 is provided with a clamping hole. The clamping protrusion can be clamped in the clamping hole. For another example, one end of the conductive piece 33 is directly clamped in the clamping hole of the current collecting component 32.

[0102] By clamping the conductive piece 33 to the current collecting component 32, the conductive piece 33 can be quickly installed on the current collecting component 32, and the assembly efficiency is high. Moreover, the connection between the conductive piece 33 and the current collecting component 32 is stable, and the conductive piece 33 is not easy to fall off, thereby reducing the risk of equal potential failure between the heat exchange pipe 31 and the box body 10.

[0103] In other embodiments, the conductive piece 33 can also be fixedly connected to the adapter sleeve 322 and the current collector 321 by welding, bonding or the like.

[0104] Please refer to Figures 5 to 13 , in some embodiments, the conductive piece 33 is connected to the heat exchange pipe 31 in an interference fit.

[0105] Interference fit connection means that there is a certain interference between two matched parts, that is, the maximum size of one part is greater than the minimum size of the other part, so that the two parts can be tightly combined during assembly, a certain pressure is generated, and the connection is realized. The interference fit connection between the conductive piece 33 and the heat exchange pipe 31 has various modes. For example, the surface of the conductive piece 33 is provided with a protruding structure. At the position of the protruding structure, the conductive piece 33 is connected to the heat exchange pipe 31 in an interference fit.

[0106] By adopting the above technical scheme, the conductive piece 33 can be connected to the heat exchange pipe 31 under a certain pressure, thereby improving the connection stability between the conductive piece 33 and the heat exchange pipe 31, and further improving the reliability of the equal potential connection between the heat exchange pipe 31 and the box body 10. In addition, during long-term use, the conductive piece 33 is not easy to fall off the heat exchange pipe 31, effectively reducing the risk of disconnection of the equal potential connection between the heat exchange pipe 31 and the box body 10, and being beneficial to prolonging the service life and durability of the battery device.

[0107] Please refer to Figures 6 to 9In some embodiments, the current collecting component 32 comprises a current collector 321 and an adapter sleeve 322, the adapter sleeve 322 is sleeved on the end of the heat exchange pipe 31, the current collector 321 is sealingly connected with the adapter sleeve 322, the heat exchange medium flows between the heat exchange pipe 31 and the current collector 321, and the conductive part 33 is clamped to at least one of the current collector 321 and the adapter sleeve 322.

[0108] The current collector 321 and the adapter sleeve 322 can be made of plastic or other materials. The adapter sleeve 322 is sleeved on the end of the heat exchange pipe 31, wherein the adapter sleeve 322 can be integrally connected with the heat exchange pipe 31 by injection molding or the like, or can be connected by welding or adhesive bonding.

[0109] The current collector 321 is used for collecting liquid, and is sealingly connected with the adapter sleeve 322, so that the current collector 321 is sealingly connected with the heat exchange pipe 31 through the adapter sleeve 322 to seal the heat exchange flow channel and the current collecting cavity, and the heat exchange medium flows between the heat exchange pipe 31 and the current collector 321. The current collector 321 can be connected with the adapter sleeve 322 by welding or adhesive bonding. For example, the current collector 321 comprises a current collecting shell 3211 and a joint 3212, the current collecting shell 3211 is sealingly connected with the adapter sleeve 322, and the joint 3212 is arranged on the current collecting shell 3211; different current collectors can be connected through a connecting pipe connected between the joints 3212.

[0110] As shown in Figure 8 , Figure 9 , the conductive part 33 is clamped to the adapter sleeve 322, and the two ends of the conductive part 33 are electrically connected to the heat exchange pipe 31 and the tank 10, respectively; in other embodiments, the conductive part 33 can also be clamped to the current collector 321, or clamped to the adapter sleeve 322 and the current collector 321 at the same time, so that the conductive part 33 is fixedly arranged relative to the current collecting component 32, so that the conductive part 33 can be stably electrically connected between the heat exchange pipe 31 and the tank 10.

[0111] The current application provides a current collecting component 32, which comprises a current collector 321 and an adapter sleeve 322. The current collector 321 is in sealed connection with the adapter sleeve 322, so that the current collector 321 can be fixedly connected to the end of the heat exchange pipe 31 through the adapter sleeve 322. The heat exchange pipe 31 has a large size, so that the end surface of the heat exchange pipe 31 has the risk of unevenness. If the current collector 321 is directly connected to the heat exchange pipe 31, there may be a problem of poor connection of the connecting surface, which affects the connection stability between the current collector 321 and the heat exchange pipe 31. The heat management component 30 provided in the current application seals the connection between the current collector 321 and the adapter sleeve 322. The current collector 321 and the adapter sleeve 322 can be tightly connected, which improves the connection stability between the current collector 321 and the heat exchange pipe 31 and the sealing reliability of the heat management component 30. In addition, the conductive part 33 is clamped to at least one of the current collector 321 and the adapter sleeve 322. The fixing mode of the conductive part 33 is flexible and convenient.

[0112] It can be understood that in other embodiments, the conductive part 33 can also be connected to the current collecting component 32 by threaded connection, welding or the like.

[0113] Please refer to Figures 6 to 13 The side of the adapter sleeve 322 is provided with a clamping groove 3221. The conductive part 33 comprises a conductive body 331 and a bent portion 332 bent to the conductive body 331. The conductive body 331 is partially clamped in the clamping groove 3221. The conductive body 331 is used for electrical connection with the box body 10. The bent portion 332 is bent from the conductive body 331 towards the heat exchange pipe 31 and abuts against the heat exchange pipe 31.

[0114] The clamping groove 3221 can be a blind groove or a through groove opened on the adapter sleeve 322. The conductive part 33 can be a sheet body. The conductive body 331 is partially clamped in the clamping groove 3221, so that the conductive part 33 can be fixed on the current collecting component 32 by clamping. The conductive body 331 is used for connecting the box body 10 and electrically conducting with the box body 10. Optionally, the conductive body 331 extends to the outer surface of the current collector 321, so as to have a larger connecting surface 312 between the conductive body 331 and the box body 10. The bent portion 332 is bent from the conductive body 331 towards the heat exchange pipe 31, so that the bent portion 332 can abut against and electrically connect with the heat exchange pipe 31. In the embodiment, the bent portion 332 directly abuts and interference fits with the heat exchange pipe 31, and the connection is stable.

[0115] By adopting the above technical solution, the conductive component 33 includes a conductive body 331 and a bending portion 332. By holding the conductive body 331 in the slot 3221 of the adapter collar 322, the conductive component 33 can be fixed on the current collector 32 by snap-fit, and the conductive component 33 is not easy to fall off. The bending portion 332 bends from the conductive body 331 toward the heat exchange tube 31, which facilitates the connection of the bending portion 332 to the heat exchange tube 31.

[0116] In some embodiments, the slot 3221 is recessed on the outer wall of the adapter collar 322 away from the heat exchange tube 31.

[0117] The adapter collar 322 is an annular component, and its inner wall forms a hollow cavity 3222. The inner wall of the adapter collar 322 is fitted onto the end of the heat exchange tube 31. A groove 3221 is recessed in the adapter collar 322 away from the outer wall of the heat exchange tube 31, and a conductive element 33 extends outside the adapter collar 322 and the current collector 321. In this way, the groove 3221 and the conductive element 33 can avoid the flow path of the heat exchange medium. In the thermal management component 30 provided in the above embodiment, the heat exchange tube 31 can achieve equipotential connection with the housing 10 through the conductive element 33. Furthermore, since the conductive element 33 is located outside the current collector 30, its installation method is less likely to affect the sealing performance of the thermal management component 30, thus improving the reliability of the battery device 100.

[0118] In other embodiments, the slot 3221 may also penetrate through the outer and inner walls of the adapter collar 322. In this case, the bent portion 332 can be clamped between the inner wall of the adapter collar 322 and the outer surface of the heat exchange tube 31, and the conductive element 33 can still electrically connect the heat exchange tube 31 and the housing 10.

[0119] like Figure 8 and Figure 10 As shown, in some embodiments, the bending portion 332 includes a first section 3321 and a second section 3322. One end of the first section 3321 is perpendicularly connected to the conductive body 331, and the other end of the first section 3321 is perpendicularly connected to the second section 3322. The second section 3322 abuts against the heat exchange tube 31.

[0120] This embodiment provides a specific structure for the bent portion 332. The first section 3321 extends toward the heat exchange tube 31 and can fit against the side of the adapter collar 322. The second section 3322 is used to connect to the surface of the heat exchange tube 31 so that the conductive element 33 is electrically connected to the heat exchange tube 31. It can be understood that the second section 3322 can directly contact the surface of the heat exchange tube 31, or the second section 3322 can also be connected to the surface of the heat exchange tube 31 through conductive elements 33 such as conductive foam.

[0121] In some embodiments, the bent portion 332 is interference-fitted with the heat exchange tube 31, such as...Figure 8 、 Figure 9 As shown in FIG. 32, the bending part 332 is attached to the edge of the heat exchange pipe 31. Since the bending part 332 is a bending structure including the first section 3321 and the second section 3322, the bending part 332 can be connected to the heat exchange pipe 31 in an interference fit. Optionally, the conductive body 331 has a first bottom surface facing the heat exchange pipe 31, and the second section 3322 has a second bottom surface facing the heat exchange pipe 31. The distance between the first bottom surface and the second bottom surface in a direction perpendicular to the conductive body 331 is greater than the distance from the bottom surface of the clamping groove 3221 to the inner wall of the adapter sleeve 322. Thus, when the conductive part 33 is installed, the conductive part 33 is inserted into the clamping groove 3221, so that the second section 3322 of the bending part 332 is connected to the surface of the heat exchange pipe 31 in an interference fit, that is, the conductive part 33 is tightly connected to the heat exchange pipe 31, and the connection is more stable. It can be understood that the conductive body 331 can also be connected to the heat exchange pipe 31 in an interference fit by other means.

[0122] By adopting the above technical scheme, since the adapter sleeve 322 is sleeved on the outside of the heat exchange pipe 31, the conductive body 331 of the conductive part 33 is clamped with the clamping groove 3221 of the adapter sleeve 322, and the bending part 332 of the conductive part 33 is a bending structure, so as to facilitate the extension of the bending part 332 towards the heat exchange pipe 31 and the connection of the bending part 332 to the heat exchange pipe 31. Further, it is also convenient to realize the interference fit connection between the bending part 332 and the heat exchange pipe 31.

[0123] In some embodiments, please refer to Figures 4 to 13 The heat exchange pipe 31 includes two oppositely arranged heat exchange surfaces 311 and two oppositely arranged connecting surfaces 312. The heat exchange surface 311 is arranged opposite to the battery monomer assembly, and each connecting surface 312 is connected between the two heat exchange surfaces 311. The bending part 332 is attached to the connecting surface 312.

[0124] The heat exchange surface 311 can be a plane, and the connecting surface 312 can be a plane, an arc surface, etc. The area of the heat exchange surface 311 is greater than the area of the connecting surface 312. The heat exchange surface 311 can be fixedly connected to the large surface of the battery monomer by adhesion or the like, so as to obtain a better heat management effect.

[0125] The clamping groove 3221 is recessed on one side of the adapter sleeve 322 close to the connecting surface 312. The conductive body 331 is clamped in the clamping groove 3221, and the bending part 332 is attached to the connecting surface 312. Optionally, the two connecting surfaces 312 of the heat exchange pipe 31 are respectively towards the top cover and the bottom wall of the box body 10. The conductive part 33 is arranged on one side of the heat exchange pipe 31 close to the bottom wall, so as to facilitate the electrical connection of the conductive part 33 to the box body 10.

[0126] By adopting the above technical solution, the bending part 332 is attached to the connecting surface 312. On the one hand, the conductive part 33 is located outside the current collecting part 32 as a whole, which does not affect the sealing performance of the thermal management part 30. On the other hand, the bending part 332 does not block the heat exchange surface 311, and the heat exchange surface 311 can be attached to the battery monomer assembly to obtain a better thermal management effect.

[0127] In other embodiments, the bending part 332 can also be attached to the heat exchange surface 311.

[0128] In some embodiments, the connecting surface 312 is an arc surface, and the bending part 332 is provided with an arc-shaped groove 33221, which is attached to the connecting surface 312.

[0129] The heat exchange pipe 31 is a harmonica pipe, and the connecting surface 312 is an arc surface. Correspondingly, the bending part 332 of the conductive part 33 is provided with an arc-shaped groove 33221, which can be attached to the connecting surface 312. Specifically, the arc-shaped groove 33221 is arranged on the second section 3322 of the bending part 332.

[0130] By adopting the above technical solution, the bending part 332 can be wrapped on the arc-shaped connecting surface 312, and the matching between the two is good. The connecting surface 312 has a larger area, and the connection is more stable.

[0131] Please refer to Figures 4 to 13 In some embodiments, the heat exchange pipe 31 extends along the first direction (X direction); along the first direction, the clamping groove 3221 penetrates the adapter sleeve ring 322, the conductive body 331 is arranged in the clamping groove 3221, the clamping groove 3221 includes a groove bottom 3221a and two groove walls 3321b arranged opposite to each other along the second direction (Y direction) and spaced apart, the second direction intersects the first direction, the top of the groove wall 3321b is provided with a flange 3321c extending towards the middle of the clamping groove 3221, and the two sides of the conductive body 331 are respectively clamped between the flange 3321c and the groove bottom 3221a.

[0132] Along the extension direction of the heat exchange pipe 31, the clamping groove 3221 penetrates the adapter sleeve ring 322, which can improve the connecting surface 312 area of the conductive part 33 and the clamping groove 3221, and improve the connection stability; and the two sides of the conductive body 331 are clamped between the flange 3321c and the groove bottom 3221a, so that the clamping groove 3221 can limit the conductive body 331, and the conductive part 33 is not easy to fall off.

[0133] In some embodiments, the first limiting part 3321d is arranged in the clamping groove 3221, and the second limiting part 3311 is arranged on the conductive part 33, and the second limiting part 3311 is clamped with the first limiting part 3321d.

[0134] One of the first limiting part 3321d and the second limiting part 3311 is a clamping hole, and the other is a clamping protrusion, for example, as shown in the drawings, the first limiting part 3321d is a clamping protrusion arranged at the bottom of the clamping groove 3221, and the clamping protrusion can be in a strip shape; the second limiting part 3311 is a clamping hole penetrating the conductive main body 331, so that the first limiting part 3321d and the second limiting part 3311 can be clamped with each other to limit the installation position of the conductive part 33, thereby improving the installation accuracy of the conductive part 33. Figure 9

[0135] When the conductive part 33 is installed, the end of the conductive main body 331 away from the bending part 332 is inserted through the clamping groove 3221 until the first limiting part 3321d and the second limiting part 3311 are clamped, and then the conductive part 33 can be installed in place.

[0136] In some embodiments, the current collecting component 32 further comprises a plugging part 323 arranged inside the annular collar, and the plugging part 323 is used to plug at least one heat exchange flow channel in the heat exchange pipe 31.

[0137] In some embodiments, the current collector 321 and the adapter collar 322 are both plastic parts.

[0138] The heat exchange pipe 31 is a metal part, and the current collector 321 and the adapter collar 322 are both plastic parts. In the manufacturing process, the heat exchange pipe 31 is provided first, and then the adapter collar 322 is covered on the end of the heat exchange pipe 31 by means of overmolding, and then the current collector 321 is fixedly connected with the adapter collar 322, so that the current collector can be fixed on the heat exchange pipe 31; the adapter collar 322 and the current collector 321 are both plastic materials, and can be fixedly connected by welding.

[0139] Since the current collector 321 and the adapter collar 322 are both plastic parts, the heat management component cannot connect the case 10 and the heat exchange pipe 31 to the same potential by means of the current collector 321 and the adapter collar 322. The heat management component 30 provided in the embodiments of the present application comprises a conductive part 33, which solves the problem of electrically connecting the heat exchange pipe 31 and the case 10 to the same potential.

[0140] By adopting the above technical solution, since the adapter collar 322 is a plastic part, the adapter collar 322 can be covered on the heat exchange pipe 31 made of metal by means of overmolding, thereby solving the problem that components made of different materials are difficult to be welded; at the same time, the current collector 321 and the adapter collar 322 are made of plastic materials, which can reduce the weight and cost of the heat management component 30 and the battery device 100.

[0141] It can be understood that in other embodiments, the adapter collar 322 can be omitted.

[0142] In some embodiments, the inner surface of the case 10 is provided with a conductive foam 13 (not shown in the drawings), and the conductive part 33 contacts the conductive foam 13.​

[0143] The conductive foam 13 can be arranged on the bottom surface, the inner side surface, the surface of the beam body of the side beam, etc. of the box body 10, and the conductive member 33 contacts the conductive foam 13 to be electrically connected with the box body 10 through the conductive foam 13. The conductive foam 13 can play a role of elastic pre-tightening. When the conductive member 33 abuts against the conductive foam 13, the conductive foam 13 can be compressed, which is conducive to the stable connection between the current collecting component 32 and the box body 10, and improves the reliability of the electrical conduction between the current collecting component 32 and the box body 10.

[0144] In some embodiments, the position and height of the conductive foam 13 can be set according to the position and installation height of the conductive member 33, which improves the flexibility of the setting of the conductive member 33.

[0145] As shown in Figure 2 In some embodiments, the number of the heat management components is multiple, and the battery monomer assembly is arranged between two adjacent heat management components.

[0146] As shown in Figure 2 In some embodiments, the number of the heat management components 30 is multiple, and the battery monomer assembly 20 is arranged between two adjacent heat management components 30.

[0147] Optionally, the plurality of battery monomer assemblies 20 are arranged in multiple rows, and each row of battery monomer assemblies 20 is arranged between two adjacent heat management components 30. The plurality of heat management components 30 can be communicated with each other to enable the heat exchange medium to flow in the plurality of heat management components 30, and the plurality of heat management components 30 can simultaneously perform heat management on the multiple rows of battery monomer assemblies 20. In this way, the heat management component 30 can regulate the temperature of the adjacent battery monomer assembly 20, and the heat management effect of the battery device 100 is good.

[0148] It can be understood that the shape of the outer surface of the heat exchange pipe 31 can be changed according to the shape of the battery monomer assembly 20. For example, if the battery monomer 21 is a cuboid, the heat exchange pipe 31 can be a straight pipe with a flat surface parallel to the outer surface of the battery monomer, and the outer surface of the heat exchange pipe 31 contacts the outer surface of the battery monomer to effectively increase the contact area. For another example, when the battery monomer 21 is in a cylindrical shape, the heat exchange pipe 31 can be in a wave shape to match the shape of the battery monomer 21. Of course, the outer surface of the heat exchange pipe 31 can also not completely match the outer surface of the battery monomer.

[0149] Please refer to Figures 2 to 13Some embodiments of the present application provide a battery device 100, comprising a box 10; a battery cell assembly 20 arranged in the box 10; a heat management component 30 arranged in the box 10 and used for heat exchange with the battery cell assembly 20, the heat management component 30 comprising a heat exchange pipe 31, a current collecting component 32 and an electrically conductive piece 33, the heat exchange pipe 31 being a metal piece, the current collecting component 32 being connected to an end of the heat exchange pipe 31 to make a heat exchange medium flow between the heat exchange pipe 31 and the current collecting component 32; the electrically conductive piece 33 being fixed on the current collecting component 32, and the electrically conductive piece 33 connecting the heat exchange pipe 31 and the box 10. The current collecting component 32 comprises a current collector 321 and an adapter sleeve 322, the adapter sleeve 322 being sleeved on an end of the heat exchange pipe 311, the electrically conductive piece 33 being clamped on the adapter sleeve 322, and the electrically conductive piece 33 being connected to the heat exchange pipe 31 in an interference fit.

[0150] The box 10 comprises an upper box 11 and a lower box 12, the battery cell assembly 20 comprises a plurality of battery cells 21, and the battery cells 21 are fixed to the heat exchange pipes 31 by adhesion, and the bottom of the battery cell assembly 20 is connected to the lower box 12 by structural adhesive, and the lower surface of the lower box 12 is provided with an electrically conductive foam 13, the electrically conductive main body 331 of the electrically conductive piece 33 is connected to the electrically conductive foam 13 in an interference fit, and the bent part 332 of the electrically conductive piece 33 is connected to the heat exchange pipe 31 in an interference fit. In this way, by arranging the electrically conductive piece 33, the heat exchange pipe 31 and the box 10 can be electrically connected, the potential difference between the heat exchange pipe 31 and the box 10 is reduced, and the reliability of the battery device 100 is improved.

[0151] The embodiments of the second aspect of the present application provide a power utilization device, comprising the battery device 100 provided in the first aspect, and the battery device 100 is used for providing electric energy.

[0152] The power utilization device can be a device or system of any of the foregoing applications of the battery device 100.

[0153] The above embodiments are only used to illustrate the technical solutions of the present application, but not limit them; although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that they can still modify the technical solutions recorded in the foregoing embodiments, or make equivalent replacements for some technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application, and should be included in the protection scope of the present 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 and used for heat exchange with the battery cell assembly. The thermal management component includes a heat exchange tube, a current collector, and a conductive element. The heat exchange tube is a metal component. The current collector is connected to the end of the heat exchange tube to allow the heat exchange medium to flow between the heat exchange tube and the current collector. The conductive element is fixed to the current collector and connects the heat exchange tube and the housing.

2. The battery device as claimed in claim 1, characterized in that, The conductive element is snapped into the current collector.

3. The battery device as claimed in claim 2, characterized in that, The conductive component is interference-fitted with the heat exchange tube.

4. The battery device as described in claim 2 or 3, characterized in that, The heat exchanger includes a collector and a transition ring. The transition ring is fitted onto the end of the heat exchange tube. The collector is sealed to the transition ring, and the heat exchange medium flows between the heat exchange tube and the collector. The conductive element is snapped into at least one of the current collector and the adapter collar.

5. The battery device as claimed in claim 4, characterized in that, The adapter collar has a slot on one side; the conductive component includes a conductive body and a bent portion connected to the conductive body. The conductive body is partially held in the slot. The conductive body is used to electrically connect with the housing. The bent portion bends from the conductive body toward the heat exchange tube and abuts against the heat exchange tube.

6. The battery device as claimed in claim 5, characterized in that, The slot is recessed on the outer wall of the adapter collar, away from the heat exchange tube.

7. The battery device as claimed in claim 6, characterized in that, The bending portion includes a first section and a second section. One end of the first section is perpendicularly connected to the conductive body, and the other end of the first section is perpendicularly connected to the second section. The second section abuts against the heat exchange tube.

8. The battery device as claimed in claim 5, characterized in that, The heat exchange tube includes two heat exchange surfaces and two connecting surfaces arranged opposite each other. The heat exchange surfaces are directly opposite the battery cell assembly, and each connecting surface is connected between the two heat exchange surfaces. The bent portion is attached to the connecting surface.

9. The battery device as claimed in claim 8, characterized in that, The connecting surface is an arc-shaped surface, and the bent portion is provided with an arc-shaped groove, which is fitted and connected to the connecting surface.

10. The battery device according to any one of claims 5-9, characterized in that, The heat exchange tube extends along a first direction; along the first direction, the slot passes through the adapter collar, the conductive body is inserted into the slot, the slot includes a bottom and two slot walls that are opposite to each other and spaced apart along a second direction, the second direction intersects the first direction, the top of the slot wall is provided with a flange extending toward the middle of the slot, and the two sides of the conductive body are respectively held between the flange and the bottom of the slot.

11. The battery device according to any one of claims 5-10, characterized in that, The slot is provided with a first limiting part, and the conductive component is provided with a second limiting part, the second limiting part being engaged with the first limiting part.

12. The battery device according to any one of claims 4-11, characterized in that, Both the current collector and the adapter collar are plastic parts.

13. The battery device according to any one of claims 1-11, characterized in that, The inner surface of the housing is provided with conductive foam, and the conductive component abuts against the conductive foam.

14. The battery device according to any one of claims 1-11, characterized in that, The number of thermal management components is multiple, and the battery cell assembly is placed between two adjacent thermal management components.

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

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