Battery device and electric device

Abstract

The embodiment of the utility model provides a battery device and a power utilization device, and belongs to the technical field of batteries. The battery device includes: a battery cell group including a plurality of battery cells; the box body forms a cavity for accommodating the battery monomer group; the electric connection assembly is arranged in the cavity and comprises a plurality of electric connection pieces arranged in the first direction, each electric connection piece is electrically connected with at least two battery monomers, the plurality of electric connection pieces are distributed at intervals in the first direction, and a transition area is formed between every two adjacent electric connection pieces; the heat exchange piece is arranged in the cavity, is positioned on the same side of the battery monomer group with the plurality of electric connecting pieces, is spaced from the electric connecting pieces, and comprises a plurality of sub-sections which are sequentially connected along the first direction, the plurality of sub-sections are connected in a bending manner, and the end parts of the sub-sections correspond to the transition area along the second direction; and the shortest distance from the end part of the sub-section to the transition area along the second direction is smaller than the shortest distance from the other part of the sub-section to the electric connecting piece. According to the invention, the short-circuit risk of the electric connector can be reduced.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and more specifically, to a battery device and an electric device. Background Art

[0002] Battery devices are widely used in consumer electronics, electric vehicles, energy storage power stations and other fields. Battery devices generate a lot of heat during the continuous charging and discharging process. Thermal management systems are usually used to cool down the battery devices. In related technologies, thermal management systems usually include heat exchangers, but air will liquefy when it encounters heat exchangers, forming condensed water on the outer surface of the heat exchangers. The condensed water contacts electrical components, posing a risk of short circuit. Utility Model Content

[0003] The present application provides a battery device and an electrical device to reduce the risk of short circuit of electrical components inside the battery device.

[0004] In a first aspect, an embodiment of the present application provides a battery device, including:

[0005] A battery cell group, comprising a plurality of battery cells;

[0006] A box body, forming a cavity for accommodating the battery cell group;

[0007] An electrical connection assembly, disposed in the cavity, comprising a plurality of electrical connections arranged along a first direction, each of the electrical connections being electrically connected to at least two of the battery cells, the plurality of electrical connections being spaced apart and distributed along the first direction and forming a transition zone between two adjacent electrical connections;

[0008] A heat exchange member is arranged in the cavity, is located on the same side of the battery cell group as the multiple electrical connectors, and is spaced apart from the electrical connectors. The heat exchange member includes a plurality of sub-segments connected in sequence along the first direction, the plurality of sub-segments are bent and connected, the ends of the sub-segments correspond to the transition zone along the second direction, and the shortest distance from the ends of the sub-segments to the transition zone along the second direction is shorter than the shortest distance from the other parts of the sub-segment to the electrical connector.

[0009] In the above technical solution, the heat exchanger and the electrical connector are arranged on the same side of the battery cell group, which can improve the reliability of the electrical connection between the electrical connector and the battery cell. At the same time, the shortest distance from the end of the sub-segment to the transition zone along the second direction is smaller than the shortest distance from the other parts of the sub-segment to the electrical connector. Compared with the straight tube solution, the distance from the other parts of the sub-segment to the electrical connector can be increased, thereby reducing the risk of condensed water on the surface of the heat exchanger contacting the electrical connector, thereby reducing the risk of short circuit of the electrical connector, thereby increasing the reliability of the battery device.

[0010] In some embodiments, the extension directions of two adjacent sub-segments form an obtuse angle, which is parallel to the extension direction of two adjacent sub-segments of the same sub-segment.

[0011] In the above technical solution, the extension direction of the two adjacent sub-segments is an obtuse angle, which can reduce the spacing between the adjacent electrical connection components, improve space utilization, and at the same time provide a more effective heat dissipation channel to reduce uneven heat dissipation that may be caused by the heat exchange layout.

[0012] In some embodiments, an extension direction of the sub-segment forms an acute angle with the first direction and the second direction.

[0013] In the above technical solution, the extension direction of the sub-segment forms an acute angle with the first direction and the second direction, which can reduce dead corners and flow resistance, help maintain the smoothness of fluid flow, and thus reduce efficiency loss caused by uneven flow rate.

[0014] In some embodiments, an angle β is formed between two adjacent sub-segments, satisfying: 120°≤β≤170°.

[0015] In the above technical solution, by adjusting the angle between the adjacent sub-segments, the flow path of the fluid and the contact mode between the fluid and the surface can be accurately controlled.

[0016] In some embodiments, the plurality of sub-segments are arranged in a one-to-one correspondence with the plurality of electrical connectors along the second direction.

[0017] In the above technical solution, the one-to-one correspondence between the sub-segments and the electrical connectors can enable each of the electrical connectors to have a corresponding heat exchange component, thereby improving the heat exchange efficiency.

[0018] In some embodiments, any two adjacent sub-segments among the plurality of sub-segments are equal in length.

[0019] In the above technical solution, the consistent length of each sub-segment helps the heat exchanger to be subjected to more uniform stress during use, reducing excessive or uneven local stress, thereby enhancing the stability of the heat exchanger and extending its service life.

[0020] In some embodiments, two adjacent sub-segments are smoothly connected.

[0021] In the above technical solution, the smooth connection between two adjacent sub-segments can reduce fluid resistance and the accumulation of bubbles or sediments, improve flow efficiency, and at the same time maintain the uniformity of fluid flow and reduce energy loss.

[0022] In some embodiments, the electrical connection assembly further includes a main body and a plug-in portion, the main body extends along the first direction, the plug-in portion is electrically connected to one end of the main body, and the plurality of electrical connectors are electrically connected to the main body;

[0023] The heat exchange component further includes an extension portion, one of the multiple sub-segments located at the end is connected to the extension portion, the extension portion is located at one side of the plug-in portion, and the outer diameter of the extension portion is smaller than the outer diameter of the sub-segment.

[0024] In the above technical solution, the plug-in part can electrically connect the multiple battery cells to the battery management system for signal transmission. The outer diameter of the extended part is smaller than the outer diameter of the sub-segment, which can avoid the plug-in part and the electrical connector of the electrical connection component and reduce interference with the electrical connection component.

[0025] In some embodiments, the heat exchange element comprises a plurality of heat exchange elements, the plurality of heat exchange elements are arranged along the second direction, and the plurality of heat exchange elements are connected in parallel.

[0026] In the above technical solution, a plurality of the heat exchange elements are connected in parallel, and the heat load can be evenly distributed among the plurality of the heat exchange elements, which helps to reduce the problem of overload of a single heat exchange element and improve the working efficiency of the heat exchange element.

[0027] In some embodiments, the electrical connection assembly includes a plurality of electrical connection assemblies spaced apart from each other along the second direction, and the heat exchange element is disposed between two adjacent electrical connection assemblies.

[0028] In the above technical solution, the electrical connection components are respectively provided on both sides of the heat exchange component along the second direction, and the heat exchange component is located between adjacent electrical connection components.

[0029] In a second aspect, an embodiment of the present application provides an electrical device, comprising: a battery device as described in any one of the above, wherein the battery device is used to store or provide electrical energy. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0031] Figure 1 A schematic diagram of the structure of an energy storage system provided in some embodiments of the present application;

[0032] Figure 2A schematic diagram of the structure of a charging network provided in some embodiments of the present application;

[0033] Figure 3 A schematic diagram of the structure of a vehicle provided in some embodiments of the present application;

[0034] Figure 4 An exploded view of the structure of a battery device provided in some embodiments of the present application;

[0035] Figure 5 One of the structural schematic diagrams of the battery device provided in some embodiments of the present application;

[0036] Figure 6 The second structural schematic diagram of the battery device provided in some embodiments of the present application.

[0037] Reference numerals:

[0038] Energy storage device 1, power conversion device 2, power generation equipment 3, charging pile 4, connector 5;

[0039] Vehicles 1000;

[0040] Battery device 100;

[0041] Box body 10, first box body 11, second box body 12;

[0042] Battery cell group 20;

[0043] Electrical connection assembly 30, electrical connection member 310, plug-in portion 320, main body portion 330, transition area 340;

[0044] Heat exchange element 40, subsection 410, extension 420;

[0045] Controller 200, motor 300;

[0046] The first direction is X, and the second direction is Y. DETAILED DESCRIPTION

[0047] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0048] Unless otherwise defined, all technical and scientific terms used in this application have the same meanings as those commonly understood by technicians in the technical field of this application; the terms used in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application; the terms "including" and "having" in the specification and claims of this application and the above-mentioned drawings and any variations thereof are intended to cover non-exclusive inclusions. The terms "first", "second", etc. in the specification and claims of this application or the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order or a primary and secondary relationship.

[0049] Reference to "embodiments" in this application means that a particular feature, structure, or characteristic described in conjunction with the embodiments may be included in at least one embodiment of the present application. The appearance of the phrase in various locations in the specification does not necessarily refer to the same embodiment, nor is it an independent or alternative embodiment that is mutually exclusive with other embodiments. It is explicitly and implicitly understood by those skilled in the art that the embodiments described in this application may be combined with other embodiments.

[0050] In the description of this application, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", and "attached" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection, or an indirect connection through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0051] The term "and / or" in this application is only a description of the association relationship of associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in this application generally indicates that the associated objects before and after are in an "or" relationship.

[0052] The term "multiple" as used in the present application refers to more than two (including two). Similarly, the term "multiple groups" refers to more than two groups (including two groups), and the term "multiple sheets" refers to more than two sheets (including two sheets).

[0053] In the embodiment of the present application, the battery cell may be a secondary battery. A secondary battery refers to a battery cell that can be continuously used by activating active materials by charging after the battery cell is discharged.

[0054] 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 storage battery, etc., which is not limited in the embodiments of the present application.

[0055] The battery cell can be cylindrical, flat, rectangular or other shapes, and the present application embodiment does not limit this. Battery cells are generally divided into three types according to the packaging method: cylindrical battery cells, square battery cells and soft-pack battery cells, and the present application embodiment does not limit this.

[0056] The battery cell includes a shell, an electrode assembly and an electrolyte, and the shell is used to contain the electrode assembly and the electrolyte. The electrode assembly is composed of a positive electrode sheet, a negative electrode sheet and a separator. The battery cell mainly relies on the movement of metal ions between the positive electrode sheet and the negative electrode sheet to work. The positive electrode sheet includes a positive electrode collector and a positive electrode active material layer. The positive electrode collector includes a positive electrode collector body and a positive electrode ear. The positive electrode active material layer is coated on the surface of the positive electrode collector body. The positive electrode ear is not coated with the positive electrode active material layer and protrudes from the positive electrode collector body. Taking lithium-ion batteries as an example, the material of the positive electrode collector can be aluminum, and the positive electrode active material can be lithium cobalt oxide, lithium iron phosphate, ternary lithium or lithium manganese oxide. The negative electrode sheet includes a negative electrode collector and a negative electrode active material layer. The negative electrode collector includes a negative electrode collector body and a negative electrode ear. The negative electrode active material layer is coated on the surface of the negative electrode collector body. The negative electrode ear is not coated with the negative electrode active material layer and protrudes from the negative electrode collector body. The negative electrode current collector may be made of copper, and the negative electrode active material may be carbon or silicon, etc. In order to ensure that a large current can be passed without melting, the number of positive electrode tabs is multiple and stacked together, and the number of negative electrode tabs is multiple and stacked together.

[0057] The material of the isolation film may be PP (polypropylene) or PE (polyethylene), etc. In addition, the electrode assembly may be a winding structure or a stacked structure, but the embodiments of the present application are not limited thereto.

[0058] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery cells, such as mobile phones, portable devices, laptop computers, electric vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery cells are used to store or provide electrical energy.

[0059] The inventors found that in order to enable the battery device to obtain sufficient power, multiple battery cells in the box of the battery device are usually stacked in an arrangement, and the battery cells adjacent to each other in the first direction are electrically connected by electrical connectors. However, the battery cells will generate a large amount of heat during the continuous charging and discharging process, which will cause the internal temperature of the battery device to rise, and the structure of stacking multiple battery cells will aggravate the occurrence of this phenomenon, which will seriously affect the performance and service life of the battery device, and even cause the battery device to have a large safety hazard during use, which is not conducive to the safety of consumers. Therefore, in the prior art, a thermal management system for cooling the battery cells is usually set inside the battery device. The thermal management system has a heat exchanger. The heat exchanger exchanges heat with the battery cells and the electrical connector, which can reduce the internal temperature of the battery device to play a role in cooling the battery device. However, in the existing thermal management system, the distance between the electrical connector and the heat exchanger is too close, and the condensed water condensed on the outer surface of the heat exchanger contacts the electrical connector, and there is a risk of short circuit of the electrical connector.

[0060] Based on the above considerations, in order to solve the problem of short circuit of the electrical connector due to the close distance between the electrical connector and the heat exchanger, the inventor has designed a battery device after in-depth research, including a battery cell group, a box, an electrical connection assembly and a heat exchanger, wherein the battery cell group includes a plurality of battery cells, the box forms a cavity for accommodating the battery cell group, the electrical connection assembly and the heat exchanger are both arranged in the cavity, the electrical connection assembly includes a plurality of electrical connectors arranged along a first direction, each electrical connector is electrically connected to at least two battery cells, the plurality of electrical connectors are spaced apart and distributed along the first direction, and a transition zone is formed between two adjacent electrical connectors; the heat exchanger and the plurality of electrical connectors are located on the same side of the battery cell group, and are spaced apart from the electrical connector, the heat exchanger includes a plurality of sub-segments connected in sequence along the first direction, the plurality of sub-segments are bent and connected, the ends of the sub-segments correspond to the transition zone along the second direction, and the shortest distance from the ends of the sub-segments to the transition zone along the second direction is shorter than the shortest distance from the other parts of the sub-segment to the electrical connector.

[0061] In a battery device of this structure, on the one hand, by arranging the heat exchanger and the electrical connector on the same side of the battery cell group, the heat can be dissipated from the electrical connector and the side of the battery cell facing the electrical connector, so that the electrical connection between the electrical connector and the battery cell is at a suitable working temperature, thereby improving the reliability of the electrical connection between the electrical connector and the battery cell; on the second hand, by arranging the heat exchanger as a plurality of sub-segments connected in a bent manner, the shortest distance from the end of the sub-segment to the transition zone along the second direction is smaller than the shortest distance from the other part of the sub-segment to the electrical connector, that is, the distance between the other part of the sub-segment away from the connection point of the two adjacent sub-segments and the electrical connector and the battery cell group is increased. Compared with the structure of a straight tube heat exchanger in which the entire heat exchange tube is at a short distance from the electrical connector and the battery cell group, which is easy to cause a short circuit between the electrical connectors, the present application can increase the distance between the other part of the sub-segment and the electrical connector and the battery cell group, thereby reducing the risk of condensed water on the surface of the heat exchanger contacting the electrical connector, thereby reducing the risk of short circuit of the electrical connector, thereby increasing the reliability of the battery device.

[0062] The battery apparatus mentioned in the embodiments of the present application may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly may include multiple battery cells, which are connected in series, in parallel or in mixed connection through a busbar component.

[0063] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells.

[0064] As an example, the battery cell assembly may be a battery module, which is formed by arranging and fixing a plurality of battery cells to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells by a cable tie.

[0065] In some embodiments, the battery device may be a battery pack, which includes a case and one or more battery cell assemblies, wherein the battery cell assemblies are accommodated in the case.

[0066] As an example, the battery cell assembly may be a battery module, and the battery cell assembly may be accommodated in the box by fixing the battery module in the box.

[0067] As an example, the battery cell assembly may also be housed in the case by directly fixing a plurality of battery cells to the case.

[0068] As an example, the box may include a first box and a second box. The first box and the second box are buckled together to form a closed space inside the box to accommodate the battery cell assembly. The closed here means covered or closed, which can be sealed or unsealed. The first box can be a top cover or a bottom plate.

[0069] As an example, the box body may include a top cover, a frame and a bottom plate. The top cover and the bottom plate are respectively connected to the frame, so that a closed space is formed inside the box body to accommodate the battery cell assembly.

[0070] In some embodiments, the box body can be used as a part of the chassis structure of the vehicle. For example, part of the box body can become at least a part of the floor of the vehicle, or part of the box body can become at least a part of the cross beam and longitudinal beam of the vehicle.

[0071] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using battery devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Battery devices are used to store or provide electrical energy.

[0072] The embodiment of the present application provides an energy storage device, including one or more battery clusters (Battery Cluster) to increase the voltage and capacity of the energy storage device. The battery cluster may include multiple battery devices, and the multiple battery devices are connected in series through a busbar component to increase the voltage of the energy storage device. When the energy storage device includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device.

[0073] The energy storage device can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems or temporary power supply systems. The energy storage device can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device can store electrical energy during low electricity consumption and provide electrical energy to relevant users or electrical devices during peak electricity consumption. The energy storage system provided in the embodiment of the present application can be any power system that requires the use of an energy storage device.

[0074] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0075] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters, wherein the battery clusters are housed in the cabinet.

[0076] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a master control module, a power distribution module, and a fire protection module.

[0077] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for regulating the temperature of the battery cells to each battery device through a pipeline.

[0078] As an example, the main control module can be used as a battery management unit of a battery cluster to monitor and manage the battery cluster. The main control module can monitor information such as the current, voltage, power or temperature of the battery cluster. For example, the charging and discharging current and voltage of the battery cluster can be controlled. The main control module includes a slave battery management unit SBMU (SBMU), a fusion switch and other modules.

[0079] As an example, the master control module can be used as a battery management unit of an energy storage device to monitor and manage the energy storage device. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device. For example, the charging and discharging current, voltage, etc. of the energy storage device can be controlled. As an example, the master control module includes an insulation monitoring module IMM (Insulation Monitoring Module, abbreviated as IMM), a master battery management unit MBMU (Master Battery Management Unit, MBMU), Ethernet ETH (EtherNet, ETH) and a fiber optic conversion module and other modules.

[0080] As an example, the fire protection system includes a control panel, detectors, alarm devices, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0081] As an example, the power distribution device may be used to distribute power to the power modules of the energy storage device.

[0082] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage devices, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0083] In some embodiments, Figure 1 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter 2 (Power Converter System, PCS for short), and the power converter 2 is used to be connected between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electric energy, and the electric energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. Among them, the specific type of the power generation device 3 is not limited in this application.

[0084] The technical solutions described in the embodiments of the present application are applicable to various electrical devices using energy storage systems, such as mobile phones, portable devices, laptop computers, battery vehicles, electric toys, electric tools, vehicles, ships and spacecraft, for example, spacecraft include airplanes, rockets, space shuttles and spacecraft, etc. Energy storage devices are used to store or provide electrical energy.

[0085] Please refer to Figure 2 The embodiment of the present application provides a charging network, including a charging pile 4 and an energy storage device 1, wherein the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electric energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device in the energy storage device 1 through a cable, and the battery device can provide its stored electric energy to the charging pile 4. The charging pile 4 has one or more connectors 5, which are used to connect to an electric device (such as a vehicle) so as to replenish energy to the electric device.

[0086] The energy storage device can be located inside the charging pile (such as an integrated storage and charging machine) or outside the charging pile.

[0087] The embodiment of the present application provides an electric device using a battery cell or a battery device or an energy storage device or an energy storage system as a power source, and the electric device may be, but is not limited to, a mobile phone, a tablet, a laptop computer, an electric toy, an electric tool, a battery car, an electric car, a ship, and a spacecraft, etc. Among them, the electric toy may include a fixed or mobile electric toy, such as a game console, an electric car toy, an electric ship toy, and an electric airplane toy, etc., and the spacecraft may include an airplane, a rocket, a space shuttle, and a spacecraft, etc.

[0088] For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electrical device according to an embodiment of the present application.

[0089] Please refer to Figure 3 , Figure 3 A schematic diagram of the structure of a vehicle 1000 provided for some embodiments of the present application. The vehicle 1000 may be a fuel vehicle, a gas vehicle or a new energy vehicle, and the new energy vehicle may be a pure electric vehicle, a hybrid vehicle or an extended-range vehicle, etc. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 may be provided at the bottom, head or tail of the vehicle 1000. The battery device 100 may be used to power the vehicle 1000, for example, the battery device 100 may be used as an operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 200 and a motor 300, and the controller 200 is used to control the battery device 100 to power the motor 300, for example, for starting, navigating and driving the vehicle 1000.

[0090] In some embodiments of the present application, the battery device 100 can not only serve as an operating power source for the vehicle 1000, but also serve as a driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0091] Please refer to Figure 4 , Figure 4 The structural exploded diagram of the battery device 100 provided in some embodiments of the present application. The battery device 100 includes a box 10 and a plurality of battery cell groups 20, and the battery cell groups 20 are accommodated in the box 10. Among them, the box 10 is used to provide an assembly space for the battery cell group 20, and the box 10 can adopt a variety of structures. In some embodiments, the box 10 may include a first box body 11 and a second box body 12, and the first box body 11 and the second box body 12 cover each other, and the first box body 11 and the second box body 12 jointly define an assembly space for accommodating the battery cell group 20. The second box body 12 can be a hollow structure with one end open, and the first box body 11 can be a plate-like structure. The first box body 11 covers the open side of the second box body 12, so that the first box body 11 and the second box body 12 jointly define the assembly space; the first box body 11 and the second box body 12 can also be hollow structures with one side open, and the open side of the first box body 11 covers the open side of the second box body 12. Of course, the box body 10 formed by the first box body 11 and the second box body 12 can be in various shapes, such as a cylinder, a cuboid, etc.

[0092] In the battery device 100, multiple battery cells can be connected in series, in parallel, or in a mixed connection. A mixed connection means that multiple battery cells are connected in series and in parallel. Multiple battery cells can be directly connected in series, in parallel, or in a mixed connection, and then the battery cell group 20 composed of multiple battery cells is accommodated in the box 10; of course, the battery device 100 can also be a battery module formed by connecting multiple battery cells in series, in parallel, or in a mixed connection, and then multiple battery modules are connected in series, in parallel, or in a mixed connection to form a whole, and accommodated in the box 10. The battery device 100 can also include other structures. For example, the battery device 100 can also include a busbar component for realizing electrical connection between multiple battery cells.

[0093] Please refer to Figure 4 , Figure 4 A partial structural diagram of a battery device 100 provided in some embodiments of the present application. The battery device 100 includes multiple rows of battery cells, which are arranged along a first direction X, and each row of battery cells includes multiple battery cells arranged along a second direction Y. The first direction X and the second direction Y are respectively the length direction of the box 10 and the width direction of the box 10, and the first direction X and the second direction Y are perpendicular to each other.

[0094] According to some embodiments of the present application, referring to Figure 5 , Figure 5 This is one of the structural schematic diagrams of the battery device 100 provided in some embodiments of the present application. Figure 6 The second structural schematic diagram of the battery device 100 provided in some embodiments of the present application. The present application provides a battery device 100, including a battery cell group 20, a box 10, an electrical connection assembly 30 and a heat exchanger 40, wherein the battery cell group 20 includes a plurality of battery cells, the box 10 forms a cavity for accommodating the battery cell group 20, and the electrical connection assembly 30 and the heat exchanger 40 are both arranged in the cavity.

[0095] The battery cell group 20 is the core component of the battery device 100 and is responsible for storing and releasing electrical energy. The battery cell is composed of a positive electrode, a negative electrode, a separator and an electrolyte, etc., and is charged and discharged through electrochemical reactions. At the same time, multiple battery cells are usually connected in series or in parallel to form the battery cell group 20.

[0096] The box 10 is mainly used to provide structural support for the battery device 100 and has good structural strength and sealing. The box 10 forms a cavity for accommodating and fixing the battery cell group 20, thereby reducing displacement or damage of the battery cell group 20 during use.

[0097] For example, the housing 10 may be made of a material with high strength and durability, such as aluminum alloy, carbon fiber or other composite materials, to maintain the structural stability of the battery device 100 during use.

[0098] The electrical connection assembly 30 and the heat exchange component 40 are both arranged in the cavity, wherein the electrical connection assembly 30 plays the role of current collection and distribution in the battery device 100. Multiple battery cells of the same battery cell group 20 are connected through the electrical connection assembly 30 to form an electrical path of the battery cell group 20.

[0099] Exemplarily, the electrical connection assembly 30 may be made of a highly conductive material, such as copper or aluminum, to efficiently conduct current and reduce power loss. At the same time, the electrical connection assembly 30 has sufficient mechanical strength to withstand factors such as thermal expansion and vibration between battery cells.

[0100] Specifically, the first direction X is perpendicular to the second direction Y, the electrical connection assembly 30 includes a plurality of electrical connectors 310 arranged along the first direction X, the battery cell group 20 includes a plurality of battery cells arranged along the first direction X, each electrical connector 310 is electrically connected to at least two battery cells, and two poles are arranged on each battery cell at intervals along the second direction Y, and both ends of the electrical connector 310 are fixedly connected to the poles of two adjacent battery cells, respectively.

[0101] In addition, the battery cells will generate a lot of heat during the charging and discharging process, and the heat exchange element 40 can be used to cool the battery cells and keep the battery cells and the electrical connection assembly 30 within a suitable operating temperature range.

[0102] Specifically, the heat exchange member 40 and the plurality of electrical connectors 310 are located on the same side of the battery cell group 20 , and the heat exchange member 40 includes a plurality of sub-segments 410 sequentially connected along the first direction X, and the plurality of sub-segments 410 are connected in a bent manner.

[0103] In some embodiments, the heat exchange element 40 has a variety of configurations, including but not limited to:

[0104] In example one, the heat exchange element 40 may be disposed between adjacent electrical connection components 30 .

[0105] like Figure 5 As shown, multiple electrical connectors 310 are located on the side of the battery cell group 20 where the pole is provided, and the heat exchange component 40 and the multiple electrical connectors 310 are located on the same side of the battery cell group 20. At the same time, the electrical connection components 30 and the battery cell groups 20 are arranged one by one, and the heat exchange component 40 is arranged between adjacent electrical connection components 30, which can cool multiple battery cell groups 20 at the same time.

[0106] In the second example, the heat exchange element 40 may be disposed on the top of the electrical connection assembly 30 .

[0107] like Figure 6 As shown, multiple electrical connectors 310 are located on the side of the battery cell group 20 where the poles are provided, the heat exchanger 40 and the multiple electrical connectors 310 are located on the same side of the battery cell group 20, the heat exchanger 40 is arranged on the side of the electrical connection assembly 30 away from the battery cell group 20, and the electrical connection assembly 30 includes two rows of electrical connectors 310 spaced apart and distributed along the second direction Y, and the heat exchanger 40 is located between the two rows of electrical connectors 310.

[0108] Example three: the heat exchange element 40 may be disposed between the electrical connection assembly 30 and the battery cell group 20 .

[0109] Multiple electrical connectors 310 are located on the side of the battery cell group 20 where the pole is provided, and the heat exchange component 40 and the multiple electrical connectors 310 are located on the same side of the battery cell group 20. When the heat exchange component 40 is arranged between the electrical connection assembly 30 and the battery cell group 20, it can be closer to the pole, thereby improving the cooling effect on the pole.

[0110] At the same time, the heat exchange component 40 and the electrical connection component 30 are arranged at intervals along the second direction Y, the sub-segments 410 and the electrical connectors 310 correspond one-to-one along the second direction Y, the ends of each sub-segment 410 are bent portions, and the gaps formed between the bent portions and adjacent electrical connectors 310 correspond along the second direction Y. The bent portions between two adjacent sub-segments 410 are designed with different distances to achieve uniform heat distribution and more efficient heat dissipation at different positions.

[0111] In the above description, each heat exchanger 40 can be arranged corresponding to one electrical connection component 30, or can be arranged corresponding to two electrical connection components 30. When each heat exchanger 40 is arranged corresponding to two electrical connection components 30, it can cool down multiple battery cell groups 20 at the same time, thereby effectively adjusting the internal temperature of the battery device 100, and further helping to reduce the safety hazards of the battery device 100 during use. At the same time, the number of heat exchangers 40 can be one or more. When there are multiple heat exchangers 40, the multiple heat exchangers 40 are arranged at intervals along the second direction Y.

[0112] Exemplarily, the heat exchange element 40 can exchange heat with the battery cells by liquid cooling to reduce the risk of performance degradation and safety accidents caused by overheating of the battery cells. The material of the heat exchange element 40 can be aluminum, copper, steel or thermal conductive silicone, etc. The cooling medium in the heat exchange element 40 can be water or ethylene glycol mixture, etc.

[0113] The electrical connection assembly 30 includes a plurality of electrical connectors 310 arranged along a first direction X, and the battery cell group 20 includes a plurality of battery cells arranged along the first direction X. Each electrical connector 310 is electrically connected to at least two battery cells, and two poles are arranged on each battery cell at intervals along a second direction Y. Both ends of the electrical connector 310 are fixedly connected to the poles of two adjacent battery cells, respectively, and a gap is formed between adjacent electrical connectors 310, which can optimize the current transmission efficiency and reduce the mutual interference between adjacent electrical connectors 310.

[0114] The heat exchanger 40 and the multiple electrical connectors 310 are located on the same side of the battery cell group 20, and the heat exchanger 40 includes a plurality of sub-segments 410 that are sequentially connected along a first direction X and relatively bent. The multiple sub-segments 410 are arranged along the arrangement direction of the multiple electrical connectors 310 and correspond to the electrical connectors 310 along the second direction Y, which can reduce the impact of condensed water on the heat exchanger 40 on the electrical connectors 310, thereby reducing the risk of short circuit of the electrical connectors 310.

[0115] According to some embodiments of the present application, referring to Figure 5 and Figure 6, multiple electrical connectors 310 are spaced apart and distributed along the first direction X and a transition zone 340 is formed between two adjacent electrical connectors 310, the end of the sub-segment 410 corresponds to the transition zone 340 along the second direction Y, and the shortest distance from the end of the sub-segment 410 to the transition zone 340 along the second direction Y is smaller than the shortest distance from the other parts of the sub-segment 410 to the electrical connector 310.

[0116] For the same electrical connection component 30, the shortest distance from the bent portion of the sub-segment 410 to the transition zone 340 along the second direction Y is smaller than the shortest distance from the other parts of the sub-segment 410 to the electrical connection component 310, that is, the shortest distance between the bent portion of the sub-segment 410 and the transition zone 340 along the second direction Y is the shortest distance between the heat exchange component 40 and the transition zone 340 in the second direction Y.

[0117] For different electrical connection components 30 , the distance from the bending portion between two adjacent sub-segments 410 to the transition zone 340 in one electrical connection component 30 is greater than the distance to the transition zone 340 in the other electrical connection component 30 , that is, adjacent bending portions are close to different electrical connection components 30 .

[0118] When the heat exchanger 40 exchanges heat with the battery cell, condensed water will adhere to the outer surface of the heat exchanger 40. The shortest distance from the end of the sub-segment 410 to the transition zone 340 along the second direction Y is smaller than the shortest distance from the other parts of the sub-segment 410 to the electrical connector 310. This can reduce the effect of the condensed water on the heat exchanger 40 on the electrical connector 310, thereby reducing the risk of short circuit of the electrical connector 310.

[0119] In addition, the ends of each sub-segment 410 correspond to the transition zone 340 along the second direction Y. The transition zone 340 is the gap formed between adjacent electrical connectors 310. At the same time, a rounded corner is provided on one side of the electrical connector 310 close to the heat exchanger 40 to avoid the ends of each sub-segment 410.

[0120] In the above description, the current transmission efficiency can be optimized and the mutual interference between adjacent electrical connectors 310 can be reduced through the transition zone 340 between adjacent electrical connectors 310. In addition, the shortest distance from the end of the sub-segment 410 along the second direction Y to the transition zone 340 is smaller than the shortest distance from the other parts of the sub-segment 410 to the electrical connector 310, which can reduce the influence of condensed water on the heat exchanger 40 on the electrical connector 310, thereby reducing the risk of short circuit of the electrical connector 310.

[0121] In the present technology, on the one hand, by arranging the heat exchanger 40 and the electrical connector 310 on the same side of the battery cell group 20, the electrical connector 310 and the side of the battery cell facing the electrical connector 310 can be cooled, so that the electrical connection between the electrical connector 310 and the battery cell is at a suitable working temperature, thereby improving the reliability of the electrical connection between the electrical connector 310 and the battery cell; on the other hand, by arranging the heat exchanger 40 as a plurality of sub-segments 410 connected in a bent manner, the shortest distance from the end of the sub-segment 410 to the transition zone 340 along the second direction Y is shorter than the shortest distance from the other parts of the sub-segment 410 to the electrical connector 310, that is, The distance between the other parts of the sub-segment 410 away from the connection points of the two adjacent sub-segments 410 and the electrical connector 310 and the battery cell group 20 is increased. Compared with the structure of the straight tube heat exchanger in which the distance between the entire heat exchange tube and the electrical connector 310 and the battery cell group 20 is small, which is easy to cause a short circuit between the electrical connector 310, the present application can increase the distance between the other parts of the sub-segment 410 and the electrical connector 310 and the battery cell group 20, thereby reducing the risk of condensed water on the surface of the heat exchanger 40 contacting the electrical connector 310, thereby reducing the risk of short circuit of the electrical connector 310, thereby increasing the reliability of the battery device 100.

[0122] According to some embodiments of the present application, referring to Figure 5 , the extension directions of two adjacent sub-segments 410 form an obtuse angle, which is parallel to the extension direction of two adjacent sub-segments 410 of the same sub-segment 410 .

[0123] The heat exchange element 40 includes a plurality of sub-segments 410 which are connected in sequence along a first direction X and are relatively bent. The plurality of sub-segments 410 are arranged along the arrangement direction of the plurality of electrical connectors 310 and correspond to the electrical connectors 310 along the second direction Y. The extension directions of two adjacent sub-segments 410 are at an obtuse angle, that is, the distance between the two ends of the same sub-segment 410 along the first direction X is greater than the distance between the two ends of the sub-segment 410 along the second direction Y, which can balance the heat exchange area and the distance between adjacent electrical connection components 30 at the same time.

[0124] In some embodiments, there are multiple structural forms, including but not limited to:

[0125] In example 1, ends of two adjacent sub-segments 410 are parallel to each other.

[0126] like Figure 5 As shown, the extension directions of two sub-segments 410 adjacent to the same sub-segment 410 are parallel, and the extension directions of the same sub-segment 410 and the adjacent sub-segment 410 are both obtuse angles. At the same time, the ends of the two sub-segments 410 adjacent to the same sub-segment 410 can be parallel. This layout can improve the efficiency and uniformity of heat transfer and help optimize the heat exchange process.

[0127] In the second example, the ends of two adjacent sub-segments 410 are not parallel to the same sub-segment 410 .

[0128] like Figure 5 As shown, the extension directions of two sub-segments 410 adjacent to the same sub-segment 410 are parallel, and the extension directions of the same sub-segment 410 and the adjacent sub-segment 410 are both obtuse angles. At the same time, the ends of the two sub-segments 410 adjacent to the same sub-segment 410 may not be parallel. This layout can improve the efficiency and uniformity of heat transfer and help optimize the heat exchange process.

[0129] In the above description, the extension direction of two adjacent sub-segments 410 is an obtuse angle, which can reduce the spacing between adjacent electrical connection components 30 and improve space utilization, while providing a more effective heat dissipation channel and reducing uneven heat dissipation that may be caused by the heat exchange layout.

[0130] According to some embodiments of the present application, referring to Figure 5 The extension direction of the sub-segment 410 forms an acute angle with the first direction X and the second direction Y.

[0131] The multiple sub-segments 410 connected in sequence along the first direction X on the heat exchanger 40 are bent and connected to form a bending portion at the connection. Exemplarily, different sub-segments 410 can have multiple structural forms. For example, the extension direction of the sub-segment 410 is at an acute angle to the first direction X and the second direction Y, but the extension directions of adjacent sub-segments 410 are different, and the two ends of the same sub-segment 410 are respectively close to different electrical connection components 30, that is, adjacent bending portions are close to different electrical connection components 30.

[0132] In addition, the extension direction of the sub-segment 410 forms an acute angle with the first direction X and the second direction Y, which can effectively increase the contact area between the sub-segment 410 and the fluid and improve the heat exchange efficiency. At the same time, the flow path of the fluid will not be too straight, which can better reduce dead corners and flow resistance, and help maintain the smoothness of the fluid flow, thereby reducing the efficiency loss caused by uneven flow rate.

[0133] According to some embodiments of the present application, referring to Figure 5 , an angle β is formed between two adjacent sub-segments 410, satisfying: 120°≤β≤170°.

[0134] The angle β between two adjacent sub-segments 410 is an obtuse angle, which can reduce the spacing between adjacent electrical connection components 30 and improve space utilization. At the same time, this arrangement is more flexible than a linear arrangement and can form a wider angle range, which helps to optimize the system structure or fluid flow.

[0135] For example, when the angle β is large, such as close to 170°, the path of the fluid flowing between the sub-segments 410 turns more gently, which helps to reduce the resistance to the fluid flow and reduce the local flow rate that is too fast or too slow, thereby improving the uniformity of the fluid flow.

[0136] Exemplarily, when the angle β is small, such as close to 120°, the sub-segments 410 are arranged more closely, which helps to increase the heat exchange area and improve the heat transfer efficiency.

[0137] In the above description, by adjusting the angle β between adjacent sub-segments 410, the flow path of the fluid and the contact mode between the fluid and the surface can be accurately controlled. At the same time, setting the angle β to an obtuse angle can reduce the spacing between adjacent electrical connection components 30 and improve space utilization.

[0138] According to some embodiments of the present application, referring to Figure 5 , the plurality of sub-segments 410 are arranged along the second direction Y in a one-to-one correspondence with the plurality of electrical connectors 310 .

[0139] The electrical connection assembly 30 is generally used to collect the current of multiple battery cells and arrange them in a certain direction. Specifically, the electrical connection assembly 30 includes multiple electrical connectors 310 arranged along a first direction X, and the arrangement direction of two adjacent electrical connection assemblies 30 is a second direction Y. At the same time, the heat exchanger 40 and the electrical connection assembly 30 are arranged at intervals along the second direction Y, and the heat exchanger 40 includes multiple sub-segments 410 that are sequentially connected and relatively bent along the first direction X, and the multiple sub-segments 410 and the multiple electrical connectors 310 are arranged one-to-one along the second direction Y.

[0140] In the above description, the one-to-one correspondence between the sub-segments 410 and the electrical connectors 310 can enable each electrical connector 310 to have a corresponding heat exchange component, thereby improving the heat exchange efficiency.

[0141] According to some embodiments of the present application, referring to Figure 5 , the lengths of any two adjacent sub-segments 410 in the multiple sub-segments 410 are equal.

[0142] The heat exchange element 40 includes a plurality of sub-segments 410 which are sequentially connected and relatively bent along a first direction X. The plurality of sub-segments 410 and the plurality of electrical connectors 310 are arranged one-to-one in correspondence along a second direction Y, and the length of each sub-segment 410 is equal. For fluid transmission in the heat exchange element 40, the equal length of the sub-segments 410 helps to maintain the consistency of flow velocity and flow rate, and can reduce the uneven distribution of fluid caused by the sub-segments 410 being too long or too short, thereby improving the efficiency and stability of fluid flow.

[0143] At the same time, the consistent length of each sub-segment 410 helps the heat exchanger 40 to be more evenly stressed during use, reducing excessive or uneven local stress, thereby enhancing the stability of the heat exchanger 40 and extending its service life.

[0144] In some embodiments, the sub-segment 410 may also be other structures, such as the lengths of some two adjacent sub-segments 410 among the multiple sub-segments 410 are equal.

[0145] The heat exchange element 40 includes a plurality of sub-segments 410 which are sequentially connected and relatively bent along the first direction X. The sub-segments 410 and the electrical connector 310 may be correspondingly arranged along the second direction Y. The lengths of the plurality of sub-segments 410 are not equal.

[0146] Exemplarily, a single sub-segment 410 and multiple electrical connectors 310 can be arranged correspondingly along the second direction Y, and a single sub-segment 410 and a single electrical connector 310 can also be arranged correspondingly along the second direction Y, that is, some sub-segments 410 are respectively arranged correspondingly to multiple electrical connectors 310, and another part of the sub-segments 410 are respectively arranged correspondingly to a single electrical connector 310.

[0147] According to some embodiments of the present application, two adjacent sub-segments 410 are smoothly connected.

[0148] A connection between two adjacent sub-segments 410 forms a bending portion, a gap between adjacent electrical connectors 310 forms a transition zone 340 , and the bending portion corresponds to the transition zone 340 along the second direction Y.

[0149] Specifically, the bending portion of the heat exchanger 40 is an arc segment, and the electrical connectors 310 on both sides of the transition zone 340 corresponding to the arc segment along the second direction Y are provided with rounded corners to avoid the heat exchanger 40, and the rounded corners are provided on the side of the electrical connector 310 close to the heat exchanger 40, which fits with the outer surface of the arc segment without contacting it.

[0150] In the above description, the smooth connection between two adjacent sub-segments 410 can reduce fluid resistance and accumulation of bubbles or sediments, improve flow efficiency, and at the same time maintain uniformity of fluid flow and reduce energy loss.

[0151] According to some embodiments of the present application, referring to Figure 5 The electrical connection assembly 30 also includes a plug-in portion 320 and a main body portion 330. The main body portion 330 extends along the first direction X. The plug-in portion 320 is electrically connected to one end of the main body portion 330. Multiple electrical connectors 310 are electrically connected to the main body portion 330. The heat exchange component 40 also includes an extension portion 420. One of the multiple sub-segments 410 located at the end is connected to the extension portion 420. The extension portion 420 is located on one side of the plug-in portion 320. The outer diameter of the extension portion 420 is smaller than the outer diameter of the sub-segment 410.

[0152] The electrical connection component 30 includes a plug-in portion 320, a main body portion 330 and a plurality of electrical connectors 310 arranged along a first direction X, wherein the plug-in portion 320 is usually located at the end of the electrical connection component 30 and is used to electrically connect to an external circuit or device, the main body portion 330 is usually a longer base portion, which carries the structure of the entire electrical connection component 30 and provides support for electrical connection, and the electrical connectors 310 are a plurality of parts electrically connected to the main body portion 330, which are arranged along the first direction X, and can connect a plurality of battery cells or electrical connection points in series or in parallel.

[0153] Exemplarily, the main body 330 can be a flexible printed circuit board (FPC) having good flexibility, being thin and light and easy to bend. The plug-in portion 320 is electrically connected to one end of the main body 330 and can be a flexible printed circuit board bus socket, i.e., an FPC bus socket, used to connect the battery cell group 20 and the battery management system. The flexible printed circuit board bus socket is usually connected to the battery cell through a flexible circuit board.

[0154] Exemplarily, the flexible printed circuit board busbar socket can electrically connect multiple battery cell groups 20 to the battery management system for signal transmission.

[0155] In addition, the heat exchanger 40 and the electrical connection assembly 30 are arranged at intervals along the second direction Y, and the heat exchanger 40 includes a plurality of sub-segments 410 and an extension portion 420 that are sequentially connected and relatively bent along the first direction X, and the extension portion 420 is located at an end corresponding to a side where the heat exchanger 40 and the electrical connection assembly 30 are provided with a plug-in portion 320, and a sub-segment 410 located at the end of the plurality of sub-segments 410 is connected to the extension portion 420, and an outer diameter of the extension portion 420 is smaller than an outer diameter of the sub-segment 410.

[0156] Specifically, electrical connection components 30 are respectively provided on both sides of the heat exchanger 40 along the second direction Y. The heat exchanger 40 is located between adjacent electrical connection components 30. The extension portion 420 is located at one end of the heat exchanger 40 and between the plug-in portions 320 of adjacent electrical connection components 30. The extension portion 420 is mainly used to provide a reliable interface for connecting the heat exchanger 40 with other heat exchange components such as a manifold. The manifold can distribute the heat exchange medium to different heat exchangers 40, or bring the heat exchange medium from different heat exchangers 40 together. The extension portion 420 is connected to the manifold to maintain the stability of the heat exchange piping system during operation.

[0157] The heat exchange element 40 may be a heat exchange tube, the outer diameter of the extension 420 is the radius from the outer wall of the extension 420 to the center of the heat exchange element 40 in the radial direction, and the outer diameter of the sub-segment 410 is the radius from the outer wall of the sub-segment 410 to the center of the heat exchange element 40 in the radial direction.

[0158] By setting the outer diameter of the extension portion 420 to be smaller than the outer diameter of the sub-segment 410 , the outer contour of the extension portion 420 can be set to be smaller than the outer contour of the sub-segment 410 , so that the extension portion 420 can play a avoidance effect and reduce interference with the electrical connection component 30 .

[0159] According to some embodiments of the present application, the heat exchange element 40 may include multiple heat exchange elements 40, and the multiple heat exchange elements 40 are arranged along the arrangement direction of the multiple electrical connection components 30, and the multiple heat exchange elements 40 are connected in parallel.

[0160] The arrangement direction of the plurality of electrical connection components 30 is the second direction Y, and the plurality of heat exchange components 40 and the plurality of electrical connection components 30 are alternately arranged along the second direction Y, which can effectively utilize the heat exchange surface and optimize the flow path of the fluid.

[0161] At the same time, multiple heat exchange elements 40 are connected in parallel, which helps to improve the total heat exchange capacity of the heat exchange elements 40. When multiple heat exchange elements 40 are connected in parallel, each heat exchange element 40 can perform heat exchange independently, and the heat load can be evenly distributed among the multiple heat exchange elements 40, which helps to reduce the problem of overload of a single heat exchange element 40 and improve the working efficiency of the heat exchange element 40.

[0162] In some embodiments, the heat exchange element 40 may also have other connection methods. For example, the heat exchange element 40 may include multiple heat exchange elements 40, and the multiple heat exchange elements 40 are arranged along the arrangement direction of the multiple electrical connection components 30, and the multiple heat exchange elements 40 are connected in series.

[0163] The plurality of heat exchange elements 40 and the plurality of electrical connection components 30 are alternately arranged along the second direction Y, which can effectively utilize the heat exchange surface and optimize the flow path of the fluid.

[0164] At the same time, multiple heat exchange elements 40 are connected in series, and the fluid passes through each heat exchange element 40 in turn, so that step-by-step heat exchange can be achieved, that is, the fluid obtains a gradual heat exchange effect in each heat exchange element 40.

[0165] According to some embodiments of the present application, the electrical connection assembly 30 includes a plurality of electrical connection assemblies 30 spaced apart from each other along the second direction Y, and the heat exchange element 40 is disposed between two adjacent electrical connection assemblies 30 .

[0166] The electrical connection assembly 30 is generally used to collect the current of multiple battery cells and arrange them in a certain direction. Specifically, the electrical connection assembly 30 includes multiple electrical connectors 310 arranged along a first direction X, and the arrangement direction of two adjacent electrical connection assemblies 30 is a second direction Y. At the same time, the heat exchanger 40 and the electrical connection assembly 30 are arranged at intervals along the second direction Y, and the heat exchanger 40 includes multiple sub-segments 410 that are sequentially connected and relatively bent along the first direction X, and the multiple sub-segments 410 and the multiple electrical connectors 310 are arranged one-to-one along the second direction Y.

[0167] In the above description, the electrical connection components 30 are respectively disposed on both sides of the heat exchange component 40 along the second direction Y, and the heat exchange component 40 is located between adjacent electrical connection components 30 .

[0168] According to some embodiments of the present application, the present application further provides an electrical device, comprising the battery device 100 of any of the above schemes, and the battery device 100 is used to store or provide electrical energy for the electrical device.

[0169] The power-consuming device may be any of the aforementioned devices or systems using the battery device 100 .

[0170] According to some embodiments of the present application, see Figure 5As shown, the present application provides a battery device 100, including a battery cell group 20, a box 10, an electrical connection assembly 30 and a heat exchanger 40, wherein the battery cell group 20 includes a plurality of battery cells, the box 10 forms a cavity for accommodating the battery cell group 20, and the electrical connection assembly 30 and the heat exchanger 40 are both arranged in the cavity. The electrical connection assembly 30 includes a plurality of electrical connectors 310 arranged along a first direction X, each electrical connector 310 is electrically connected to at least two battery cells, the heat exchanger 40 and the plurality of electrical connectors 310 are located on the same side of the battery cell group 20, and the heat exchanger 40 is spaced apart from the electrical connector 310, and the heat exchanger 40 includes a plurality of sub-segments 410 sequentially connected along the first direction X, and the plurality of sub-segments 410 are connected in a bent manner. The plurality of electrical connectors 310 are spaced apart and distributed along the first direction X, and a transition zone 340 is formed between two adjacent electrical connectors 310; the end of the sub-segment 410 corresponds to the transition zone 340 along the second direction Y, and the shortest distance from the end of the sub-segment 410 to the transition zone 340 along the second direction Y is shorter than the shortest distance from the other part of the sub-segment 410 to the electrical connector 310. The extension direction of two adjacent sub-segments 410 is an obtuse angle, which is parallel to the extension direction of two adjacent sub-segments 410 of the same sub-segment 410, and the lengths of any two adjacent sub-segments 410 in the plurality of sub-segments 410 are equal. At the same time, the extension direction of the sub-segment 410 is an acute angle with the first direction X and the second direction Y, and the adjacent two sub-segments 410 are smoothly connected to form an angle β, which satisfies: 120°≤β≤170°. The plurality of sub-segments 410 are arranged one-to-one with the plurality of electrical connectors 310 along the second direction Y. The electrical connection assembly 30 further includes a plug-in portion 320 and a main body portion 330, the main body portion 330 extends along the first direction X, the plug-in portion 320 is electrically connected to one end of the main body portion 330, and a plurality of electrical connectors 310 are electrically connected to the main body portion 330; the heat exchanger 40 further includes an extension portion 420, the extension portion 420 is located at one side of the plug-in portion 320, one of the plurality of sub-segments 410 located at the end is connected to the extension portion 420, and the outer diameter of the extension portion 420 is smaller than the outer diameter of the sub-segment 410. The heat exchanger 40 may include a plurality of heat exchangers 40, the plurality of heat exchangers 40 are arranged along the arrangement direction of the plurality of electrical connection assemblies 30, and the plurality of heat exchangers 40 are connected in parallel. The electrical connection assembly 30 includes a plurality of heat exchangers 40 arranged at intervals along the first direction X, and the heat exchanger 40 is arranged between two adjacent electrical connection assemblies 30.

[0171] Unless otherwise specified, all embodiments and optional embodiments of the present application can be combined with each other to form a new technical solution.

[0172] Unless otherwise specified, all technical features and optional technical features of this application can be combined with each other to form a new technical solution.

[0173] The above are only preferred embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: include: A battery cell group, comprising a plurality of battery cells; A box body, forming a cavity for accommodating the battery cell group; An electrical connection assembly, disposed in the cavity, comprising a plurality of electrical connections arranged along a first direction, each of the electrical connections being electrically connected to at least two of the battery cells, the plurality of electrical connections being spaced apart and distributed along the first direction and forming a transition zone between two adjacent electrical connections; A heat exchange member is arranged in the cavity, is located on the same side of the battery cell group as the multiple electrical connectors, and is spaced apart from the electrical connectors. The heat exchange member includes a plurality of sub-segments connected in sequence along the first direction, the plurality of sub-segments are bent and connected, the ends of the sub-segments correspond to the transition zone along the second direction, and the shortest distance from the ends of the sub-segments to the transition zone along the second direction is shorter than the shortest distance from the other parts of the sub-segment to the electrical connector.

2. The battery device according to claim 1, characterized in that: The extension directions of two adjacent sub-segments form an obtuse angle, which is parallel to the extension directions of two adjacent sub-segments of the same sub-segment.

3. The battery device according to claim 1, characterized in that: An extension direction of the sub-segment forms an acute angle with the first direction and the second direction.

4. The battery device according to claim 1, characterized in that: An included angle β is formed between two adjacent sub-segments, satisfying: 120°≤β≤170°.

5. The battery device according to claim 1, characterized in that: The plurality of sub-segments are arranged in one-to-one correspondence with the plurality of electrical connectors along the second direction.

6. The battery device according to claim 1, characterized in that: The lengths of any two adjacent sub-segments in the multiple sub-segments are equal.

7. The battery device according to claim 1, characterized in that: Two adjacent sub-segments are smoothly connected.

8. The battery device according to any one of claims 1 to 7, characterized in that: The electrical connection assembly further includes a main body and a plug-in portion, the main body extending along the first direction, the plug-in portion electrically connected to one end of the main body, and the plurality of electrical connectors electrically connected to the main body; The heat exchange component further includes an extension portion, one of the multiple sub-segments located at the end is connected to the extension portion, the extension portion is located at one side of the plug-in portion, and the outer diameter of the extension portion is smaller than the outer diameter of the sub-segment.

9. The battery device according to any one of claims 1 to 7, characterized in that: The heat exchange elements include a plurality of heat exchange elements, the plurality of heat exchange elements are arranged along the second direction, and the plurality of heat exchange elements are connected in parallel.

10. The battery device according to claim 9, characterized in that: The electrical connection components include a plurality of components that are spaced apart from each other along the second direction, and the heat exchange component is disposed between two adjacent electrical connection components.

11. An electrical device, characterized in that: include: The battery device according to any one of claims 1 to 10, wherein the battery device is used to store or provide electrical energy.

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