Battery device and electric device

Abstract

The utility model is suitable for the technical field of batteries, and provides a battery device and a power utilization device. The battery monomer assembly is arranged in the box body; the heat management part is arranged in the box body and is used for exchanging heat with the battery monomer assembly, the heat management part comprises a heat exchange pipe and a flow collecting part, a plurality of heat exchange runners are arranged in the heat exchange pipe, and a first concave-convex structure is arranged at the end part of the heat exchange pipe; the current collecting component comprises a current collector, an adapter sleeve ring and a plugging piece, the adapter sleeve ring is arranged at the end of the heat exchange tube in a sealing and sleeving mode and connected with the first concave-convex structure, and the plugging piece is arranged at the end opening, close to the adapter sleeve ring, of at least one heat exchange flow channel and supports the heat exchange tube; and the current collector is in sealed connection with the adapter sleeve ring, so that the heat exchange medium circulates between the heat exchange runner and the current collector. According to the battery device provided by the embodiment of the invention, the risk of lithium precipitation of the battery monomer caused by the plugging piece in the thermal management component can be reduced.

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 battery thermal management, 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] Temperature has an important influence on the performance of the battery, so the battery in the conventional technology will be provided with a thermal management component for cooling the battery or heating the battery in a low-temperature environment to make it reach the normal working temperature range.

[0005] At present, some thermal management components are provided with an adapter at the end of the heat exchange pipe, the current collector is sealingly connected with the adapter, and then the current collector is connected to the heat exchange pipe. In order to improve the connection stability, the connection length between the adapter and the heat exchange pipe is relatively long, and correspondingly, the length of the plugging member in the heat exchange flow channel is relatively long in order to support the end of the heat exchange pipe. However, the battery monomer will expand during the charging and discharging process. If the length of the plugging member is relatively long, the plugging member will be arranged opposite to the battery monomer, and the plugging member will press the battery monomer, so that the battery monomer has the risk of lithium precipitation. Utility model content

[0006] Therefore, the embodiments of the present application provide a battery device and an electric device, which can reduce the risk of lithium precipitation of the battery monomer caused by the plugging member in the thermal management component.

[0007] 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 and a current collecting component, the heat exchange pipe is provided with a plurality of heat exchange flow channels, and the end of the heat exchange pipe is provided with a first concave-convex structure; the current collecting component comprises a current collector, an adapter sleeve ring and a plugging member, the adapter sleeve ring is sealingly sleeved on the end of the heat exchange pipe, the adapter sleeve ring is connected with the first concave-convex structure, and the plugging member is arranged at the port of at least one heat exchange flow channel close to the adapter sleeve ring and supports the heat exchange pipe; and the current collector is sealingly connected with the adapter sleeve ring, so that the heat exchange medium flows between the heat exchange flow channels and the current collector.

[0008] The battery device provided by the embodiments of the present application comprises a heat management component, the heat management component comprises a heat exchange pipe and a current collecting component, the current collecting component comprises a current collector, an adapter sleeve and a blocking piece, the adapter sleeve is sleeved on the end of the heat exchange pipe, and the current collector is connected to the end of the heat exchange pipe through the adapter sleeve, so that the connection stability and sealing reliability between the current collector and the heat exchange pipe are good; the end of the heat exchange pipe is provided with a first concave-convex structure, the adapter sleeve is connected with the first concave-convex structure, and the first concave-convex structure increases the connection area of the heat exchange pipe and the adapter sleeve, so that the heat management component can shorten the length of the adapter sleeve and the length of the blocking piece, and reduce the risk of lithium precipitation of the battery monomer caused by the direct arrangement of the blocking piece and the battery monomer assembly.

[0009] In some embodiments, the heat exchange pipe has a first outer wall surface, the adapter sleeve has a first inner wall surface, the first concave-convex structure is arranged on the first outer wall surface, and the first inner wall surface is connected with the first concave-convex structure in a matching mode.

[0010] By adopting the above technical solution, the first inner wall surface of the adapter sleeve is connected with the first concave-convex structure in a matching mode, the connection area between the adapter sleeve and the heat exchange pipe is increased, and the length of the adapter sleeve is shortened.

[0011] In some embodiments, the first inner wall surface has a second concave-convex structure, and the second concave-convex structure is connected with the first concave-convex structure in a clamping mode.

[0012] By adopting the above technical solution, the connection area between the adapter sleeve and the heat exchange pipe is large and stable, the sealing performance between the adapter sleeve and the heat exchange pipe is good, and the heat exchange medium is not easy to overflow from the adapter sleeve and the heat exchange pipe.

[0013] In some embodiments, the first concave-convex structure comprises a plurality of first protruding parts protruding from the first outer wall surface, a first recess is formed between adjacent first protruding parts, the second concave-convex structure comprises a second recess clamped with the first protruding part and a second protruding part clamped with the first recess.

[0014] By adopting the above technical solution, the first concave-convex structure and the second concave-convex structure are connected in a clamping mode, and the connection area and the connection stability of the heat exchange pipe and the adapter sleeve can be effectively improved.

[0015] In some embodiments, the heat exchange pipe extends along a first direction, each first protruding part extends along a second direction, the plurality of first protruding parts are arranged in sequence along the first direction, and the second direction intersects with the first direction.

[0016] By adopting the above technical solution, the first concave-convex structure comprises a plurality of first protruding parts, and the first concave-convex structure is convenient to manufacture.

[0017] In some embodiments, the first protrusion has a first side and a second side oppositely distributed along the first direction, the first side and the second side are inclined relative to the first outer wall surface, and the first side and the second side are close to each other along a direction away from the first outer wall surface.

[0018] By adopting the above technical solution, the distribution density of the first protrusion is improved, and the connection area of the adapter sleeve ring and the heat exchange pipe is further improved, which is beneficial to further shorten the length of the adapter sleeve ring and the plugging piece.

[0019] In some embodiments, the first outer wall surface 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 two heat exchange surfaces; and the first concave-convex structure is arranged on at least one heat exchange surface.

[0020] By adopting the above technical solution, the first concave-convex structure is arranged on at least one heat exchange surface, which facilitates the manufacturing of the first concave-convex structure on the surface of the heat exchange pipe, and the manufacturing cost of the heat exchange pipe is relatively low.

[0021] In some embodiments, the current collector thermal management component further includes an electrically conductive piece, the electrically conductive piece is clamped to at least one of the current collector and the adapter sleeve ring, and the electrically conductive piece connects the heat exchange pipe and the box body.

[0022] By adopting the above technical solution, the electrically conductive piece can be connected to the heat exchange pipe and the box body at the same time to reduce the potential difference between the heat exchange pipe and the box body, so as to realize the equipotential connection between the heat exchange pipe and the box body, and improve the reliability of the battery device.

[0023] In some embodiments, one side of the adapter sleeve ring is provided with a clamping groove; the electrically conductive piece includes an electrically conductive main body and a bent portion connected to the electrically conductive main body, the electrically conductive main body is partially clamped in the clamping groove, the electrically conductive main body is used for electrically connecting with the box body, and the bent portion is bent from the electrically conductive main body towards the heat exchange pipe and abuts against the heat exchange pipe.

[0024] By adopting the above technical solution, the electrically conductive piece is fixed on the adapter sleeve ring by clamping, and the electrically conductive piece is not easy to fall off; the bent portion is bent from the electrically conductive main body towards the heat exchange pipe, which facilitates the connection of the bent portion and the heat exchange pipe.

[0025] In some embodiments, the bent portion is connected to the connecting surface in an interference fit.

[0026] By adopting the above technical solution, the connection between the bent portion and the connecting surface has high reliability, which improves the reliability of the equipotential connection; the electrically conductive piece is located on the outside of the current collector component as a whole, which does not affect the sealing performance of the thermal management component; the bent portion 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.

[0027] In some embodiments, the heat exchange pipe is a metal piece, and the adapter sleeve is a plastic piece, and the adapter sleeve is integrally injection molded with the end of the heat exchange pipe.

[0028] By adopting the above technical solution, the adapter sleeve can be tightly covered on the heat exchange pipe, and the sealing performance is good; the first inner wall surface of the adapter sleeve forms the second concave-convex structure matched with the first concave-convex structure, and the connection area and the connection stability of the adapter sleeve and the heat exchange pipe are improved.

[0029] In some embodiments, the adapter sleeve and the end of the heat exchange pipe are welded or glued.

[0030] By adopting the above technical solution, the adapter sleeve can be sealed and connected to the heat exchange pipe in multiple ways.

[0031] In some embodiments, the current collector and the adapter sleeve are plastic pieces, and the current collector and the adapter sleeve are welded or glued.

[0032] By adopting the above technical solution, the current collector and the adapter sleeve are plastic pieces, and the two can be sealed and connected by welding or gluing, and the connection stability is good.

[0033] 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.

[0034] In this way, the heat management component can adjust the temperature of the adjacent battery monomer assembly, and the heat management effect of the battery device is good.

[0035] The second aspect of the application provides a power utilization device, which comprises the battery device of the first aspect, and the battery device is used for providing electric energy.

[0036] The above description is only a summary of the technical solutions of the application, in order to more clearly understand the technical means of the application, the specific embodiments of the application can be implemented according to the content of the description, and in order to make the above and other purposes, characteristics and advantages of the application more obvious and easy to understand, the following will describe the specific embodiments of the application. BRIEF DESCRIPTION OF DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the application, the following will briefly introduce the drawings needed to be used in the embodiments or conventional technical description, and obviously, the drawings in the following description are only some embodiments of the application, and those skilled in the art can also obtain other drawings according to these drawings without creating any creative labor.

[0038] Figure 1 is a structural schematic diagram of a vehicle provided by an embodiment of the application;

[0039] Figure 2 is a structural schematic diagram of a battery device provided by an embodiment of the present application;

[0040] Figure 3 is a three-dimensional exploded schematic diagram of a battery monomer provided by an embodiment of the present application;

[0041] Figure 4 is a partial schematic diagram of a battery device provided by an embodiment of the present application;

[0042] Figure 5 is a partial enlarged view of A part in Figure 4

[0043] Figure 6 is a three-dimensional exploded schematic diagram of a thermal management component provided by an embodiment of the present application;

[0044] Figure 7 is a partial enlarged view of B part in Figure 6

[0045] Figure 8 is a front view of the thermal management component shown in Figure 6

[0046] Figure 9 is a sectional view along line C-C of the thermal management component shown in Figure 8

[0047] Figure 10 is a structural schematic diagram of the thermal management component and the conductive foam in the battery device shown in Figure 4

[0048] Figure 11 is a three-dimensional schematic diagram of the conductive sheet in the thermal management component shown in Figure 10

[0049] The meanings of the marks in the figures are as follows:

[0050] ​​​​​​1000, vehicle; 100, battery device; 200, controller; 300, motor; 10, box; 11, upper box; 12, lower box; 13, conductive foam; 20, battery cell assembly; 21, battery cell; 211, shell; 212, end cover; 213, electrode assembly; 214, electrode terminal; 215, pressure relief mechanism; 30, thermal management component; 31, heat exchange pipe; 301, heat exchange flow channel; 311, first outer wall surface; 3111, heat exchange surface; 3112, connecting surface; 312, first concave-convex structure; 3121, first convex portion; 3122, first concave portion; 3121a, first side surface; 3121b, second side surface; 32, current collecting component; 321, current collector; 322, adapter collar; 3221, clamping groove; 3222, first inner wall surface; 3223, second concave-convex structure; 3223a, second concave portion; 3223b, second convex portion; 323, plugging member; 33, conductive member; 331, conductive main body; 3311, second limiting portion; 332, bent portion; 3321, first section; 3322, second section. DETAILED DESCRIPTION

[0051] The embodiments of the technical scheme of the present application will be described in detail below 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, and cannot limit the protection scope of the present application.

[0052] 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 herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the present application; the terms "include" and "have" and any variations thereof used in the specification and the claims and the above description of drawings are intended to cover the inclusion not the exclusion of one or more elements.

[0053] 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 "a plurality of" is two or more, unless otherwise explicitly and specifically limited.

[0054] 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.

[0055] In the description of the embodiments of the present application, the term "and / or" is merely an 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 an "or" relationship between the front and rear associated objects.

[0056] In the description of the embodiments of the present application, the term "a plurality of" refers to two or more (including two), and similarly, "a plurality of groups" refers to two or more groups (including two groups), and "a plurality of pieces" refers to two or more pieces (including two pieces).

[0057] In the description of the embodiments of the present application, unless otherwise explicitly specified and limited, the technical terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or it can be electrical connection; it can be directly connected, or it can be indirectly connected through an intermediate medium; it 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 the embodiments of the present application can be understood according to the specific circumstances.

[0058] 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.

[0059] 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 in this regard.

[0060] 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.

[0061] In some embodiments, the battery cell assembly is usually formed by arranging a plurality of battery cells.

[0062] 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.

[0063] In some embodiments, the battery device can be a battery pack including a case and one or more battery cell assemblies housed in the case.

[0064] As an example, the battery cell assembly can be a battery module, and the battery cell assembly can be housed in the case by fixing the battery module in the case.

[0065] As an example, the battery cell assembly can also be housed in the case by fixing a plurality of battery cells directly in the case.

[0066] At present, from the development of market situation, the application of power battery is more and more widely. Power battery is not only applied to energy storage power supply system of hydropower, thermal power, wind power and solar power station, but also widely used in electric bicycles, electric motorcycles, electric vehicles and other electric vehicles and other fields. With the continuous expansion of the application field of power battery, the market demand is also increasing.

[0067] The battery usually includes a battery cell and a case. The battery cell is placed in the case, and the case can provide a housing space for the battery cell and play a certain protection role. For the battery, the battery cell is the component that actually occurs electrochemical reaction.

[0068] When the internal electrochemical reaction of the battery cell occurs, heat will be generated. With the cyclic use of the battery, the battery cell 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 inside the battery for cooling the battery or heating the battery in a low temperature environment to make it reach the normal working temperature range.

[0069] At present, some heat management components are provided with an adapter at the end of the heat exchange pipe, and the current collector is sealingly connected with the adapter, and then the current collector is connected to the heat exchange pipe. In order to improve the connection stability, the connection length between the adapter and the heat exchange pipe is relatively long, and correspondingly, the length of the plugging piece in the heat exchange flow channel is usually greater than the length of the adapter, so as to support the end of the heat exchange pipe. However, if the length of the plugging piece is relatively long, the plugging piece will be arranged opposite to the battery cell. The battery cell expands and has a large surface pressure during charging and discharging process, and the plugging piece will extrude the battery cell, so that the battery cell has the risk of lithium precipitation.

[0070] Based on the above considerations, one or more embodiments of the present application provide a heat management component, which includes a heat exchange pipe and a current collecting component, the current collecting component includes a current collector, an adapter sleeve and a blocking piece, the adapter sleeve is sealingly arranged at the end of the heat exchange pipe, and the current collector is sealingly connected to the end of the heat exchange pipe through the adapter sleeve; by arranging the first concave-convex structure at the end of the heat exchange pipe, the connection area between the adapter sleeve and the heat exchange pipe is increased, which is beneficial to shorten the length of the adapter sleeve, and accordingly, the length of the blocking piece is also shortened, so that the blocking piece can avoid the battery monomer and reduce the risk of lithium precipitation of the battery monomer.

[0071] The embodiments of the present application provide a power consumption device using a battery as a power supply, which can be but is not limited to a mobile phone, a tablet, a notebook computer, an electric toy, an electric tool, an electric vehicle, an electric car, a ship, a spacecraft, etc. Among them, the electric toy can include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, an electric plane toy, etc., and the spacecraft can include an airplane, a rocket, a space shuttle, a spacecraft, etc. The following embodiments take a power consumption device of an embodiment of the present application as a vehicle for example for convenient description.

[0072] The technical solutions described in the embodiments of the present application are applicable to various power consumption devices using battery monomers, such as a mobile phone, a portable device, a notebook computer, an electric vehicle, an electric toy, an electric tool, a vehicle, a ship and a spacecraft, etc. For example, the spacecraft includes an airplane, a rocket, a space shuttle and a spacecraft, etc. The following embodiments take a power consumption device of an embodiment of the present application as a vehicle for example for convenient description.

[0073] Please refer to Figure 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, and the new energy automobile can be a pure electric automobile, a hybrid electric automobile or a range extended automobile, etc. The vehicle 1000 is internally provided with a battery device 100, which can be arranged at the bottom, the head or the 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 supply of the vehicle 1000. The vehicle 1000 can further 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 working power demand of the vehicle 1000 during starting, navigation and driving.

[0074] In some embodiments of the present application, the battery device 100 can not only be used as an operating power supply of the vehicle 1000, but also be used as a driving power supply of the vehicle 1000, to replace or partially replace fuel or natural gas to provide driving power for the vehicle 1000.

[0075] Referring to Figure 1 and Figure 2 The battery device 100 includes a box body 10 and a battery cell assembly 20. The box body 10 includes an upper box body 11 and a lower box body 12. The upper box body 11 and the lower box body 12 are mutually covered, and the upper box body 11 and the lower box body 12 jointly define a containing space for containing battery cells. The lower box body 12 can be a hollow structure with one end open, and the upper box body 11 can be a plate-shaped 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, a cuboid, etc.

[0076] Referring to Figure 2 The battery cell assembly 20 is usually formed by arranging a plurality of battery cells. The battery device 100 further includes a thermal management component 30. The thermal management component 30 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 cell assembly 20 in the box body 10. The battery cell assembly 20 generates heat during the circulation process. The battery cell 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. The thermal management component 30 can also be referred to as a cooling member, 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 cell assembly 20, which will not be described here.

[0077] Referring to Figure 2 and Figure 3 The battery cell assembly 20 includes a plurality of battery cells 21 arranged in sequence. The battery cell 21 is the smallest unit constituting the battery device 100. The battery cell 21 includes a shell 211, an end cover 212, an electrode assembly 213, and other functional components.

[0078] 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. Optionally, 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 not easily deformed when subjected to extrusion collision, so that the battery cell 21 can have higher structural strength, and the use reliability can also be improved. The end cover 212 can be provided with functional components such as electrode terminals 214, pressure relief mechanisms 215, etc. The electrode terminals 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., and the embodiments of the present application do not make special limitations. 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.

[0079] 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, the 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 covered on 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 form a common connecting surface before other components enter the shell, and when it is necessary to encapsulate the internal environment of the shell 211, the end cover 212 is covered on the shell 211. The shell 211 can be various shapes and various sizes, such as cuboid, cylinder, 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., and the embodiments of the present application do not make special limitations.

[0080] The electrode assembly 213 is a component in which an electrochemical reaction occurs in the battery cell 21. One or more electrode assemblies 213 can be included inside 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 the electrolyte, and the tabs connect the electrode terminal 214 to form a current loop.

[0081] 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, for example, a rupture disc, 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 portion provided in the pressure relief mechanism 215 breaks, thereby forming an opening or passage for the internal pressure to be released.

[0082] Please refer to Figure 2 , Figure 4 , Figures 6 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 and a current collecting component 32, the heat exchange pipe 31 is provided with a plurality of heat exchange flow channels 301, and the end of the heat exchange pipe 31 is provided with a first concave-convex structure 312; the current collecting component 32 comprises a current collector 321, an adapter sleeve 322, and a plugging member 323, the adapter sleeve 322 is sealingly sleeved on the end of the heat exchange pipe 31, the adapter sleeve 322 is connected with the first concave-convex structure 312, and the plugging member 323 is arranged at the port of at least one heat exchange flow channel 301 close to the adapter sleeve 322 and supports the heat exchange pipe 31; the current collector 321 is sealingly connected with the adapter sleeve 322, so that the heat exchange medium flows between the heat exchange flow channel 301 and the current collector 321.

[0083] The box body 10 is used for accommodating 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.

[0084] The cross section of the heat exchange pipe 31 can be a regular shape such as a circle, a rectangle, an ellipse, or other irregular shapes. The heat exchange pipe 31 is provided with a plurality of heat exchange flow channels 301, which 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 301, it can exchange heat with the battery monomer assembly 20. The heat exchange medium can be water, air, coolant, etc.

[0085] In some embodiments, the heat exchange pipe 31 can be flat tube-shaped, and a plurality of heat exchange flow channels 301 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 can stably support the battery monomer assembly 20.

[0086] In some embodiments, the heat exchange pipe 31 is provided with a flow collecting component 32 at both ends, and the flow collecting component 32 is in communication with the heat exchange flow channel 301. The heat exchange medium can circulate unidirectionally in the heat exchange pipe 31, that is, the heat exchange medium can enter from the flow collecting component 32 at one end of the heat exchange pipe 31, and then directly discharge from the flow 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 before being discharged through one flow collecting component 32.

[0087] The flow collecting component 32 includes a flow collector 321, an adapter sleeve 322, and a plugging piece 323. The heat exchange pipe 31 has a large size, so that the end face of the heat exchange pipe 31 has the risk of unevenness. If the flow collector 321 is directly connected to the heat exchange pipe 31, there can be a problem of poor connection of the connection surface, which affects the connection stability between the flow collector 321 and the heat exchange pipe 31. The heat management component 30 provided in the embodiments of the present application seals and connects the flow collector 321 and the adapter sleeve 322, and the flow collector 321 and the adapter sleeve 322 can be tightly connected, thereby improving the connection stability between the flow collector 321 and the heat exchange pipe 31 and the sealing reliability of the heat management component 30.

[0088] The adapter sleeve 322 is sealingly 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 other methods, or can be connected by welding or adhesive connection.

[0089] The flow collector 321 is used for collecting liquid, and the flow collector 321 is sealingly connected with the adapter sleeve 322, so that the flow collector 321 is sealingly connected with the heat exchange pipe 31 through the adapter sleeve 322. The flow collector 321 and the adapter sleeve 322 can be fixedly connected by welding, adhesive connection, etc.

[0090] The blocking piece 323 is arranged at the port of the at least one heat exchange channel 301 close to the adapter sleeve 322. The blocking piece 323 can block part of the heat exchange channel 301 and support the heat exchange pipe 31. In the process of connecting the adapter sleeve 322 and the heat exchange pipe 31, the heat exchange pipe 31 is not easy to deform under the support of the blocking piece 323. In order to achieve better support effect, the length of the blocking piece 323 is greater than the length of the adapter sleeve 322 along the extension direction of the heat exchange pipe 31. The blocking piece 323 can be an integrated structure or a split structure corresponding to the heat exchange channel 301.

[0091] The blocking piece 323 can be fixed on the heat exchange channel 301 by welding, clamping or the like. Optionally, the blocking piece 323 is provided with a through hole for the heat exchange medium. The heat exchange channel 301 blocked by the blocking piece 323 is not communicated with the current collector 321. The remaining heat exchange channels 301 can be communicated with the current collector 321. On the one hand, the weight of the heat exchange medium in the heat exchange pipe 31 is reduced. On the other hand, the weight of the heat exchange pipe 31 itself is reduced, which is beneficial to improve the weight energy density of the battery device 100.

[0092] The end of the heat exchange pipe 31 is provided with a first concave-convex structure 312. The first concave-convex structure 312 is located at the part of the heat exchange pipe 31 for connecting the adapter sleeve 322. The first concave-convex structure 312 can include one or more convex / concave structures. In this way, the adapter sleeve 322 is connected to the end of the heat exchange pipe 31 and covers the first concave-convex structure 312, which increases the connection area of the adapter sleeve 322 and the heat exchange pipe 31, is beneficial to shorten the length of the adapter sleeve 322, and correspondingly, is beneficial to shorten the length of the blocking piece 323, so that the blocking piece 323 can avoid the battery monomer 21 and reduce the risk of lithium precipitation of the battery monomer 21 caused by the extrusion of the blocking piece 323.

[0093] In the process of manufacturing the heat management component 30, the blocking piece 323 is arranged at the port of the at least one heat exchange channel 301, the adapter sleeve 322 is sleeved on the end of the heat exchange pipe 31, and the adapter sleeve 322 is connected with the heat exchange pipe 31 and the first concave-convex structure 312 on the heat exchange pipe 31. Then, the current collector 321 is connected to the adapter sleeve 322.

[0094] The battery device 100 provided by the embodiments of the present application comprises a heat management component 30, the heat management component 30 comprises a heat exchange pipe 31 and a current collection component 32, the current collection component 32 comprises a current collector 321, an adapter sleeve 322 and a blocking piece 323, the adapter sleeve 322 is sealingly sleeved on the end of the heat exchange pipe 31, and the current collector 321 is connected to the end of the heat exchange pipe 31 through the adapter sleeve 322, so that the connection stability and sealing reliability between the current collector 321 and the heat exchange pipe 31 are better; since the end of the heat exchange pipe 31 is provided with a first concave-convex structure 312, the adapter sleeve 322 is sealingly connected with the first concave-convex structure 312, and the first concave-convex structure 312 increases the connection area of the heat exchange pipe 31 and the adapter sleeve 322, so that the heat management component 30 can shorten the length of the adapter sleeve 322 and the length of the blocking piece 323, and reduce the risk of lithium precipitation of the battery monomer 21 caused by the direct arrangement of the blocking piece 323 and the battery monomer 21.

[0095] In some embodiments, the heat exchange pipe 31 has a first outer wall surface 311, the adapter sleeve 322 has a first inner wall surface 3222, the first concave-convex structure 312 is arranged on the first outer wall surface 311, and the first inner wall surface 3222 is connected with the first concave-convex structure 312 in a matched mode.

[0096] The heat exchange pipe 31 has a first outer wall surface 311, the first concave-convex structure 312 is arranged on the first outer wall surface 311, and the first concave-convex structure 312 can be directly made on the first outer wall surface 311, that is, the first concave-convex structure 312 is integrally formed with the heat exchange pipe 31. In other embodiments, the first concave-convex structure 312 can be pre-made and connected on the first outer wall surface 311.

[0097] The adapter sleeve 322 is substantially annular, and the adapter sleeve 322 has a first inner wall surface 3222. The adapter sleeve 322 is sleeved on the end of the heat exchange pipe 31, so that the first inner wall surface 3222 is sealingly connected with the first outer wall surface 311, and the first inner wall surface 3222 is connected with the first concave-convex structure 312 in a matched mode.

[0098] By adopting the above technical scheme, the first inner wall surface 3222 of the adapter sleeve 322 is connected with the first concave-convex structure 312 in a matched mode, the connection area between the adapter sleeve 322 and the heat exchange pipe 31 is increased, and the length of the adapter sleeve 322 is shortened.

[0099] In some embodiments, the first inner wall surface 3222 has a second concave-convex structure 3223, and the second concave-convex structure 3223 is connected with the first concave-convex structure 312 in a clamping mode.

[0100] The second concave-convex structure 3223 is connected with the first concave-convex structure 312 in a clamping manner, so that the adapter sleeve 322 is sealingly connected with the heat exchange pipe 31. On one hand, the connection area between the adapter sleeve 322 and the heat exchange pipe 31 is large and the connection is stable. On the other hand, the sealing performance between the adapter sleeve 322 and the heat exchange pipe 31 is good, and the heat exchange medium is not easy to overflow from the adapter sleeve 322 and the heat exchange pipe 31.

[0101] Please refer to Figures 6 to 9 In some embodiments, the first concave-convex structure 312 includes a plurality of first protruding parts 3121 protruding from the first outer wall surface 311, and a first recess part 3122 is formed between adjacent first protruding parts 3121. The second concave-convex structure 3223 includes a second recess part 3223a clamped with the first protruding part 3121 and a second protruding part 3223b clamped with the first recess part 3122.

[0102] The first protruding part 3121 is a structure protruding relative to the surface of the heat exchange pipe 31. The first protruding part 3121 can have various shapes, such as point shape, column shape, strip shape, and cone shape. A first recess part 3122 is formed between adjacent first protruding parts 3121. The first recess part 3122 is a structure recessed relative to the first protruding part 3121. The first recess part 3122 can be a gap between adjacent first protruding parts 3121, or a structure recessed on the surface of the heat exchange pipe 31.

[0103] The second concave-convex structure 3223 includes a second recess part 3223a and a second protruding part 3223b. In this way, the second concave-convex structure 3223 can be connected with the first concave-convex structure 312 in a clamping manner.

[0104] By adopting the above technical solution, the first concave-convex structure 312 and the second concave-convex structure 3223 are connected in a clamping manner, which can effectively improve the connection area and stability of the heat exchange pipe 31 and the adapter sleeve 322.

[0105] Please continue to refer to Figures 6 to 9 In some embodiments, the heat exchange pipe 31 extends along a first direction X, each first protruding part 3121 extends along a second direction Z, and a plurality of first protruding parts 3121 are arranged along the first direction X in sequence, and the second direction Z intersects the first direction X.

[0106] The heat exchange pipe 31 can be a flat tube extending along the first direction X, and the first protruding part 3121 extends along the second direction Z, that is, the first protruding part 3121 is substantially strip-shaped. The second direction Z can also be perpendicular to the first direction X or intersected at other angles.

[0107] The plurality of first protrusions 3121 are arranged in sequence along the first direction X, and the adapter sleeve 322 covers the plurality of first protrusions 3121, so that the adapter sleeve 322 can be connected with the first concave-convex structure 312 in a sealing manner.

[0108] By adopting the technical scheme, the first concave-convex structure 312 includes the plurality of first protrusions 3121, and the first concave-convex structure 312 is convenient to manufacture; the adapter sleeve 322 covers the plurality of first protrusions 3121, so that the connection area between the adapter sleeve 322 and the heat exchange pipe 31 is effectively increased, and the connection stability between the adapter sleeve 322 and the heat exchange pipe 31 is improved.

[0109] In some embodiments, as shown in Figure 7 The first protrusion 3121 has the first side surface 3121a and the second side surface 3121b which are oppositely distributed along the first direction X, the first side surface 3121a and the second side surface 3121b are inclined relative to the first outer wall surface 311, and the first side surface 3121a and the second side surface 3121b are close to each other along a direction away from the first outer wall surface 311.

[0110] For example, the first protrusion 3121 can be in the form of a fin, and the plurality of first protrusions 3121 are connected in sequence, and the distribution density of the first protrusion 3121 is relatively high.

[0111] The first side surface 3121a and the second side surface 3121b are both arranged to be inclined relative to the first outer wall surface 311 and close to each other along a direction away from the first outer wall surface 311, so that the width of the first protrusion 3121 away from one end of the heat exchange pipe 31 is smaller than the width of the first protrusion 3121 close to the other end of the heat exchange pipe 31, a gap is formed between the two adjacent first protrusions 3121, and the gap is the first concave portion 3122; the two adjacent first protrusions 3121 close to the heat exchange pipe 31 can be connected with each other, so that the distribution density of the first protrusion 3121 is improved.

[0112] The first concave-convex structure 312 provided by the embodiment has the following advantages: the structure of the first protrusion 3121 is simple and convenient to manufacture on the surface of the heat exchange pipe 31; the gap between the adjacent first protrusions 3121 forms the first concave portion 3122, so that the plurality of first protrusions 3121 can be connected in sequence, the distribution density of the first protrusion 3121 is improved, the connection area between the adapter sleeve 322 and the heat exchange pipe 31 is further increased, and the length of the adapter sleeve 322 and the plugging member 323 can be further shortened.

[0113] Please refer to Figure 4 and Figure 6In some embodiments, the first outer wall surface 311 comprises two oppositely arranged heat exchange surfaces 3111 and two oppositely arranged connecting surfaces 3112, the heat exchange surfaces 3111 are arranged opposite to the battery monomer assembly 20, and each connecting surface 3112 is connected between two heat exchange surfaces 3111; the first concave-convex structure 312 is arranged on at least one heat exchange surface 3111.

[0114] The heat exchange surface 3111 can be a plane, the connecting surface 3112 can be a plane, an arc surface, etc., the area of the heat exchange surface 3111 is greater than the area of the connecting surface 3112; the heat exchange surface 3111 can be fixedly connected to the large surface of the battery monomer by bonding or the like, so as to obtain a better heat management effect. The first convex structure is arranged on at least one heat exchange surface 3111, that is, the connecting area of the adapter sleeve ring 322 and the heat exchange pipe 31 can be increased.

[0115] By adopting the above technical scheme, the first concave-convex structure 312 is arranged on at least one heat exchange surface 3111, which facilitates the manufacturing of the first concave-convex structure 312 on the surface of the heat exchange pipe 31, and the manufacturing cost of the heat exchange pipe 31 is relatively low.

[0116] Please refer to Figure 5 , Figure 10 , Figure 11 In some embodiments, the heat management component 30 further comprises an electrically conductive part 33, the electrically conductive part 33 is clamped to at least one of the current collector 321 and the adapter sleeve ring 322, and the electrically conductive part 33 connects the heat exchange pipe and the box body.

[0117] The electrically conductive part 33 is a component with electrically conductive capability, in some embodiments, the electrically conductive part 33 is a metal part, the material of the electrically conductive part 33 can be various metals, such as copper, silver, gold, aluminum and other metals with good electrical conductivity; the electrically conductive part 33 can also be an electrically conductive plastic part, a composite part of metal and plastic, etc. The electrically conductive part 33 can be a sheet body, or a block body or other shapes.

[0118] For example, the electrically conductive part 33 is clamped to the adapter sleeve ring 322, and the two ends of the electrically conductive part 33 are electrically connected to the heat exchange pipe 31 and the box body 10 respectively; in other embodiments, the electrically conductive part 33 can also be clamped to the current collector 321, or clamped to the adapter sleeve ring 322 and the current collector 321 at the same time, so that the electrically conductive part 33 is fixedly arranged relative to the current collecting component 32, so that the electrically conductive part 33 can be stably electrically connected between the heat exchange pipe 31 and the box body 10.

[0119] The electrically conductive part 33 connects the heat exchange pipe 31 and the box body 10, since the electrically conductive part 33 is of electrically conductive material, the electrically conductive part 33 is not only structurally connected to the heat exchange pipe 31 and the box body 10, but also electrically connected to the heat exchange pipe 31 and the box body 10, that is, the electrically conductive part 33 electrically contacts the heat exchange pipe 31 and the box body 10, in this way, the electrically conductive part 33 can be electrically connected to the heat exchange pipe 31 and the box body 10.

[0120] For example, one end of the conductive piece 33 is connected to the heat exchange pipe 31. The conductive piece 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 be electrically connected to the heat exchange pipe 31 through a conductive foam or the like. The other end of the conductive piece 33 is connected to the box body 10. The conductive piece 33 can directly contact the inner wall of the box body 10 or a beam body in the box body 10, or can be electrically connected to the box body 10 through a conductive foam 13 or the like. In this way, the conductive piece 33 can electrically connect the heat exchange pipe 31 and the box body 10, so as to reduce the potential difference between the heat exchange pipe 31 and the box body, thereby facilitating the equipotential connection between the heat exchange pipe 31 and the box body 10. The equipotential connection, i.e., the potential equalization, can reduce the risk of electric shock and other safety hazards.

[0121] By arranging the conductive piece 33 in the thermal management component 30, the conductive piece 33 can be connected to the heat exchange pipe 31 and the box body 10 at the same time, so as to reduce the potential difference between the heat exchange pipe 31 and the box body 10, thereby facilitating the equipotential connection between the heat exchange pipe 31 and the box body 10 and improving the reliability of the battery device 100.

[0122] In some embodiments, one side of the adapter sleeve 322 is provided with a clamping groove 3221. The conductive piece 33 includes a conductive main body 331 and a bent portion 332 connected to the conductive main body 331. The conductive main body 331 is partially clamped in the clamping groove 3221. The conductive main body 331 is used to be electrically connected to the box body 10. The bent portion 332 is bent from the conductive main body 331 towards the heat exchange pipe 31 and abuts against the heat exchange pipe 31.

[0123] The clamping groove 3221 can be a blind groove or a through groove formed in the adapter sleeve 322. The conductive piece 33 can be a sheet body. The conductive main body 331 is partially clamped in the clamping groove 3221, so that the conductive piece 33 can be fixed on the current collecting component 32 by clamping. The conductive main body 331 is used to be electrically connected to the box body 10. Optionally, the conductive main body 331 extends to the outer surface of the current collector 321, so that the conductive main body 331 has a large connection area with the box body 10. The bent portion 332 is bent from the conductive main body 331 towards the heat exchange pipe 31, so that the bent portion 332 can abut against and be electrically connected to the heat exchange pipe 31. In this embodiment, the bent portion 332 directly abuts against and is interference-fitted with the heat exchange pipe 31, so that the connection is stable.

[0124] By adopting the above technical solution, the conductive piece 33 includes the conductive main body 331 and the bent portion 332. The conductive main body 331 is clamped in the clamping groove 3221 of the adapter sleeve 322, so that the conductive piece 33 can be fixed on the current collecting component 32 by clamping and is not easy to fall off. The bent portion 332 is bent from the conductive main body 331 towards the heat exchange pipe 31, so that the bent portion 332 can be connected to the heat exchange pipe 31.

[0125] In some embodiments, the bending portion 332 is connected to the connecting surface 3112 in an interference fit.

[0126] The clamping groove 3221 is arranged on the side of the adapter ring 322 close to the connecting surface 3112, and the conductive body 331 is clamped in the clamping groove 3221, and the bending portion 332 is attached to the connecting surface 3112. Optionally, the two connecting surfaces 3112 of the heat exchange pipe 31 are respectively directed towards the top cover and the bottom wall of the box body 10, and the conductive member 33 is arranged on the side of the heat exchange pipe 31 close to the bottom wall, so as to facilitate the electrical connection of the conductive member 33 to the box body 10.

[0127] The bending portion 332 is a bent structure including a first section 3321 and a second section 3322, one end of the first section 3321 is connected perpendicularly to the conductive body 331, the other end of the first section 3321 is connected perpendicularly to the second section 3322, and the second section 3322 abuts against the heat exchange pipe 31. The length of the second section 3322 is set so that the second section 3322 is connected to the connecting surface of the heat exchange pipe 31 in an interference fit.

[0128] When the conductive member 33 is installed, the conductive member 33 is inserted into the clamping groove 3221, so that the second section 3322 of the bending portion 332 is connected to the surface of the heat exchange pipe 31 in an interference fit, that is, the conductive member 33 is tightly abutted against the heat exchange pipe 31, and the connection is 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.

[0129] By adopting the above technical solution, the bending portion 332 is connected to the connecting surface 3112 in an interference fit, the connection reliability of the two is high, and the reliability of the equipotential connection is improved; the conductive member 33 is located on the outside of the current collecting component 32 as a whole, and does not affect the sealing performance of the thermal management component 30; the bending portion 332 does not block the heat exchange surface 3111, and the heat exchange surface 3111 can be attached to the battery monomer assembly to obtain a better thermal management effect.

[0130] In other embodiments, the bending portion 332 can also be attached to the heat exchange surface 3111.

[0131] In some embodiments, the inner surface of the box body 10 is provided with conductive foam 13 (not shown in the figure), and the conductive member 33 contacts the conductive foam 13.

[0132] The conductive foam 13 can be arranged on the surface of the bottom surface, the inner side surface, and the beam body of the box body 10, and the conductive member 33 contacts the conductive foam 13 to be electrically connected to the box body 10 through the conductive foam 13. The conductive foam 13 can play a role of elastic pre-tightening, and 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 of the current collecting component 32 and the box body 10, and improves the reliability of the electrical connection between the current collecting component 32 and the box body 10.

[0133] In some embodiments, the position and height of the conductive foam 13 can be set according to the position and mounting height of the conductive member 33, which improves the flexibility of the setting of the conductive member 33.

[0134] In some embodiments, the heat exchange pipe 31 is a metal member, and the adapter sleeve 322 is a plastic member, which is integrally injection-molded with the end of the heat exchange pipe 31.

[0135] The heat exchange pipe 31 is a metal member, and the adapter sleeve 322 is integrally connected with the heat exchange pipe 31 through injection molding, that is, the heat exchange pipe 31 is used as an embedded part during injection molding, and the adapter sleeve 322 is formed on the first outer wall surface 311 of the heat exchange pipe 31, so that the first inner wall surface 3222 of the adapter sleeve 322 is tightly combined with the first outer wall surface 311 of the heat exchange pipe 31.

[0136] Since the first concave-convex structure 312 is pre-formed on the heat exchange pipe 31, after the adapter sleeve 322 is injection-molded on the heat exchange pipe 31, the first inner wall surface 3222 of the adapter sleeve 322 forms a second concave-convex structure 3223 that is connected with the first concave-convex structure 312.

[0137] By setting the adapter sleeve 322 as a plastic member that is integrally connected with the heat exchange pipe 31, on the one hand, the adapter sleeve 322 can be tightly covered on the heat exchange pipe 31, and has good sealing performance, and on the other hand, the first inner wall surface 3222 of the adapter sleeve 322 forms the second concave-convex structure 3223 that is connected with the first concave-convex structure 312, which improves the connection area and stability of the adapter sleeve 322 and the heat exchange pipe 31.

[0138] In other embodiments, the adapter sleeve 322 is welded or glued to the end of the heat exchange pipe 31.

[0139] The adapter sleeve 322 can also be welded on the heat exchange pipe 31 through laser welding or the like, and the first inner wall surface 3222 and the first outer wall surface 311 can be welded; the adapter sleeve 322 can also be fixed on the heat exchange pipe 31 through adhesive, and the first inner wall surface 3222 and the first outer wall surface 311 are glued.

[0140] By adopting the above technical solutions, the adapter sleeve 322 can be sealed and connected to the heat exchange pipe 31 in multiple ways, the end of the heat exchange pipe 31 is provided with the first concave-convex structure 312, and the first inner wall surface 3222 of the adapter sleeve 322 can be sealed and connected with the first concave-convex structure 312, and the connection is relatively stable.

[0141] In some embodiments, the current collector 321 and the adapter sleeve 322 are plastic members, and the current collector 321 is welded or glued to the adapter sleeve 322.

[0142] Since the current collector 321 and the adapter sleeve 322 are both plastic parts, the two can be connected in a sealing manner by welding or gluing, and the connection stability is good. Specifically, the current collector 321 is connected to the side of the adapter sleeve 322 away from the heat exchange pipe 31. Further, since the current collector 321 and the adapter sleeve 322 are both plastic parts, and the heat exchange pipe 31 is a metal part, the conductive part 33 can connect the heat exchange pipe 31 and the box body 10 to the same potential.

[0143] By adopting the above technical solution, the current collector 321 and the adapter sleeve 322 are both plastic parts, which are convenient to connect and have high connection reliability. Moreover, since the current collector 321 and the adapter sleeve 322 are both plastic parts, the plastic material is lighter and has lower cost, thereby reducing the weight and cost of the thermal management component 30.

[0144] As shown in FIG. 1, Figure 2 In some embodiments, the number of thermal management components 30 is multiple, and the battery monomer assembly 20 is arranged between two adjacent thermal management components 30.

[0145] 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 thermal management components 30. The plurality of thermal management components 30 can be connected to each other to enable the heat exchange medium to flow in the plurality of thermal management components 30, and the plurality of thermal management components 30 can simultaneously perform thermal management on the multiple rows of battery monomer assemblies 20. In this way, the thermal management component 30 can regulate the temperature of the adjacent battery monomer assemblies 20, and the thermal management effect of the battery device 100 is good.

[0146] 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 cylindrical, the heat exchange pipe 31 can be wavy 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.

[0147] Please refer to Figures 2 to 11Some embodiments of the present application provide a battery device 100, comprising a box 10, a battery cell assembly 20 arranged in the box 10, and a thermal management component 30 arranged for heat exchange with the battery cell assembly 20, the thermal management component 30 comprising a heat exchange pipe 31 and a flow collecting component 32, the heat exchange pipe 31 is provided with a plurality of heat exchange flow channels 301, and the end of the heat exchange pipe 31 is provided with a first concave-convex structure 312; the flow collecting component 32 comprises a flow collector 321, an adapter sleeve 322, and a blocking piece 323, the adapter sleeve 322 is sealingly sleeved on the end of the heat exchange pipe 31 and sealingly connected with the first concave-convex structure 312, and the blocking piece 323 is arranged at the port of at least one heat exchange flow channel 301 close to the adapter sleeve 322 and supports the heat exchange pipe 31; the flow collector 321 is sealingly connected with the adapter sleeve 322, so that the heat exchange medium flows between the heat exchange flow channels 301 and the flow collector 321. In some embodiments, the heat exchange pipe 31 has a first outer wall surface 311, the adapter sleeve 322 has a first inner wall surface 3222, and the first inner wall surface 3222 is integrally connected with the first outer wall surface 311; the first concave-convex structure 312 comprises a plurality of first convex portions 3121 arranged in sequence, and a first concave portion 3122 is formed between adjacent first convex portions 3121. In the battery device 100 provided by the embodiments of the present application, the thermal management component 30 has good connection stability, and the risk of lithium precipitation of the battery cell 21 caused by the excessive length of the blocking piece 323 in the thermal management component 30 is reduced.

[0148] The embodiments of the second aspect of the present application provide a power consumption device, comprising the battery device 100 provided by the first aspect, and the battery device 100 is used for providing electric energy.

[0149] The power consumption device can be a device or system of any of the foregoing application battery devices 100.

[0150] The above embodiments are only used to illustrate the technical solutions of the present application, but not to 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 replacement for part of the 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 by, The application relates to a battery pack, which comprises a box body, a battery cell assembly arranged in the box body, and a heat management component arranged in the box body and used for heat exchange with the battery cell assembly. The heat management component comprises a heat exchange pipe and a current collecting component. The heat exchange pipe is internally provided with a plurality of heat exchange flow channels. The heat exchange pipe is provided with a first concave-convex structure at the end thereof. The current collecting component comprises a current collector, an adapter sleeve and a blocking piece.

2. The battery device of claim 1, wherein The adapter sleeve is sealingly sleeved on the end of the heat exchange pipe.

3. The battery device of claim 2, wherein The adapter sleeve is connected with the first concave-convex structure.

4. The battery device of claim 3, wherein The blocking piece is arranged at the port of at least one heat exchange flow channel close to the adapter sleeve and supports the heat exchange pipe.

5. The battery device of claim 4, wherein The current collector is sealingly connected with the adapter sleeve, so that a heat exchange medium can flow between the heat exchange flow channels and the current collector.

6. The battery device of claim 5, wherein The heat exchange pipe has a first outer wall surface.

7. The battery device according to any one of claims 2 to 6, wherein The adapter sleeve has a first inner wall surface.

8. The battery device of claim 7, wherein The first concave-convex structure is arranged on the first outer wall surface.

9. The battery device of claim 8, wherein, The first inner wall surface is connected with the first concave-convex structure in a matched mode.

10. The battery device of claim 9, wherein, The first inner wall surface has a second concave-convex structure.

11. The battery device according to any one of claims 1 to 6, wherein The second concave-convex structure is connected with the first concave-convex structure in a clamped mode.

12. The battery device according to any one of claims 1 to 6, wherein The first concave-convex structure comprises a plurality of first convex parts protruding from the first outer wall surface.

13. The battery device according to any one of claims 1 to 6, wherein The second concave-convex structure comprises a second concave part clamped with the first convex part and a second convex part clamped with the first concave part. The heat exchange pipe extends along a first direction. Each first convex part extends along a second direction. The second direction intersects with the first direction. The first convex part has a first side surface and a second side surface oppositely distributed along the first direction. The first side surface and the second side surface are inclined relative to the first outer wall surface. The first side surface and the second side surface are close to each other along a direction away from the first outer wall surface. The first outer wall surface comprises two oppositely arranged heat exchange surfaces and two oppositely arranged connecting surfaces. The heat exchange surface is arranged opposite to the battery cell assembly. Each connecting surface is connected between two heat exchange surfaces. The first concave-convex structure is arranged on at least one heat exchange surface. The heat management component further comprises an electrically conductive part. The electrically conductive part is clamped on at least one of the current collector and the adapter sleeve. The electrically conductive part is electrically connected with the heat exchange pipe and the box body. One side of the adapter sleeve is provided with a clamping groove. The electrically conductive part comprises an electrically conductive main body and a bent part connected with the electrically conductive main body. The electrically conductive main body is partially clamped in the clamping groove. The electrically conductive main body is used for electrical connection with the box body. The bent part is bent from the electrically conductive main body towards the heat exchange pipe and abuts against the heat exchange pipe. The bent part is connected with the connecting surface in an interference fit mode. The heat exchange pipe is a metal part. The adapter sleeve is a plastic part. The adapter sleeve is integrally injection-molded with the end of the heat exchange pipe. The adapter sleeve is welded or glued with the end of the heat exchange pipe. The current collector and the adapter sleeve are plastic parts. The current collector is welded or glued with the adapter sleeve.

14. The battery device according to any one of claims 1 to 6, wherein The number of the thermal management components is plural, and the battery cell assembly is disposed between two adjacent thermal management components.

15. An electrical device, comprising: The battery device as claimed in any one of claims 1 to 14, the battery being used to provide electric energy.

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