Battery device, energy storage device, energy storage system, power utilization device and charging network

Abstract

The utility model provides a battery device, an energy storage device, an energy storage system, a power utilization device and a charging network, the battery device comprises a battery monomer, a sampling module, a control module and a heat insulation part, the sampling module comprises an insulation part and a sampling assembly, the insulation part is arranged between the sampling assembly and the battery monomer, the sampling assembly is electrically connected with the battery monomer, and the control module is electrically connected with the insulation part. The control module is electrically connected with the sampling assembly and directly connected with the insulating part, and the heat insulation part is arranged between the control module and the insulating part and directly connected with the insulating part. According to the battery device provided by the invention, the control module and the heat insulation part are directly connected with the insulation part, so that the control module, the heat insulation part and the sampling module are integrated into a whole, and therefore, a bracket does not need to be additionally adopted for fixing the control module and the heat insulation part, and the number of parts of the battery device is effectively reduced; and the production cost of the battery device is effectively reduced.

Description

Technical Field

[0001] The present application belongs to the field of battery technology, and more specifically, relates to a battery device, an energy storage device, an energy storage system, an electrical device, and a charging network. Background Art

[0002] At present, with the rapid development of new energy industry and energy storage industry, the application of battery devices has become more and more extensive, which has put higher requirements on the production cost of battery devices.

[0003] The battery device includes a battery cell, a sampling module, a control module and a heat insulating member. The sampling module is electrically connected to the battery cell to collect the working state signal of the battery cell and transmit the working state signal of the battery cell to the control module, thereby realizing monitoring of the working state signal of the battery cell. The heat insulating member is used to isolate the heat transfer between the control module and the battery cell. However, in the related art, the control module and the heat insulating member need to be fixed by a bracket, which is not conducive to reducing the production cost of the battery device. Utility Model Content

[0004] The purpose of the embodiments of the present application is to provide a battery device, an energy storage device, an energy storage system, an electrical device and a charging network to solve the technical problem of high production cost of battery devices in related technologies.

[0005] To achieve the above-mentioned purpose, the technical solution adopted in the embodiment of the present application is: to provide a battery device, including:

[0006] Battery cells;

[0007] The sampling module comprises an insulating member and a sampling assembly, wherein the insulating member is arranged between the sampling assembly and the battery cell, and the sampling assembly is electrically connected to the battery cell;

[0008] A control module, electrically connected to the sampling assembly and directly connected to the insulating member;

[0009] The heat insulating member is arranged between the control module and the insulating member and is directly connected to the insulating member.

[0010] The battery device provided in the embodiment of the present application has at least the following beneficial effects: the control module and the thermal insulation member in the battery device provided in the embodiment of the present application are directly connected to the insulating member to integrate the control module, the thermal insulation member and the sampling module into a whole. In this way, there is no need to use an additional bracket to fix the control module and the thermal insulation member, thereby effectively reducing the number of components of the battery device and effectively reducing the production cost of the battery device.

[0011] In some embodiments of the present application, the insulating member includes an insulating body arranged between the sampling assembly and the battery cell, a first connecting structure connected to the insulating body, and a second connecting structure connected to the insulating body, the first connecting structure is used to connect the control module, and the second connecting structure is used to connect the thermal insulation member.

[0012] By adopting the above technical solution, it is convenient to directly connect the control module and the heat insulation component to the insulating component.

[0013] In some embodiments of the present application, the first connection structure is connected to the control module by thermal riveting.

[0014] By adopting the above technical solution, the connection structure between the control module and the insulating member is effectively simplified, thereby further reducing the production cost of the battery device.

[0015] In some embodiments of the present application, the first connection structure includes a first connection portion, the control module is provided with a first connection hole, the first connection portion is passed through the first connection hole and is connected to the control module by thermal riveting.

[0016] By adopting the above technical solution, it is convenient to connect the control module to the insulating member by thermal riveting.

[0017] In some embodiments of the present application, the second connection structure is connected to the thermal insulation component by heat riveting.

[0018] By adopting the above technical solution, the connection structure between the heat insulating member and the insulating member is effectively simplified, thereby further reducing the production cost of the battery device.

[0019] In some embodiments of the present application, the second connection structure includes a second connection portion, the thermal insulation member is provided with a second connection hole, the second connection portion is passed through the second connection hole and is thermally riveted to the thermal insulation member.

[0020] By adopting the above technical solution, it is convenient to connect the heat insulation component and the insulating component by hot riveting.

[0021] In some embodiments of the present application, there are multiple first connection structures; at least some of the first connection structures are arranged along the periphery of the control module and connected to the sides of the control module; and / or, at least some of the first connection structures are connected to the middle of the control module.

[0022] By adopting the above technical solution, the force between the insulating member and the control module can be made more uniform, thereby effectively improving the connection stability between the control module and the insulating member.

[0023] In some embodiments of the present application, there are multiple second connection structures; at least some of the second connection structures are arranged along the periphery of the thermal insulation element and connected to the side of the thermal insulation element; and / or, at least some of the second connection structures are connected to the middle of the thermal insulation element.

[0024] By adopting the above technical solution, the force between the insulating member and the thermal insulation member can be made more uniform, thereby effectively improving the connection stability between the thermal insulation member and the insulating member.

[0025] In some embodiments of the present application, the first connection structure is also used to connect a sampling component.

[0026] By adopting the above technical solution, the control module and the sampling component can share a connection structure, thereby effectively simplifying the structure of the battery device and further reducing the production cost of the battery device.

[0027] In some embodiments of the present application, the first connecting structure includes a supporting portion and a first connecting portion, the supporting portion is connected between the insulating body and the first connecting portion, the first connecting portion is used to connect the control module, the supporting portion has a supporting surface for supporting the control module, and the distance between the supporting surface and the insulating body is greater than or equal to the distance between the surface of the thermal insulation component facing the control module and the insulating body.

[0028] By adopting the above technical solution, it is convenient to arrange the thermal insulation component between the control module and the insulating component, which effectively reduces the risk of interference between the thermal insulation component and the control module.

[0029] In some embodiments of the present application, the heat insulating component is provided with an avoidance hole, and the support portion is passed through the avoidance hole.

[0030] By adopting the above technical solution, the risk of interference between the thermal insulation component and the first connecting structure is effectively reduced.

[0031] In some embodiments of the present application, the sampling component includes a first circuit component and a second circuit component, the battery cell includes a first electrode terminal electrically connected to the first circuit component and a second electrode terminal electrically connected to the second circuit component, the first circuit component and the second circuit component are both electrically connected to the control module and are arranged on opposite sides of the control module, and the control module is arranged in the middle of the sampling component along the length direction.

[0032] By adopting the above technical solution, the internal layout structure of the battery device is effectively optimized, so that the internal structure of the battery device becomes more compact and the volume of the battery device is effectively reduced.

[0033] In some embodiments of the present application, the sampling component includes a first conductive member, a second conductive member, a first circuit member, and a second circuit member, the battery cell includes a first electrode terminal and a second electrode terminal, the first conductive member is electrically connected between the first circuit member and the first electrode terminal, the second conductive member is electrically connected between the second circuit member and the second electrode terminal, and the first circuit member and the second circuit member are both electrically connected to the control module.

[0034] By adopting the above technical solution, it is convenient to electrically connect the battery cell, the sampling component and the control module, so that the control module can control the battery cell.

[0035] In some embodiments of the present application, the first conductive member and the second conductive member are both directly connected to the insulating member.

[0036] By adopting the above technical solution, there is no need to use additional connecting components to fix the first conductive member and the second conductive member, thereby further reducing the number of components of the battery device and further reducing the production cost of the battery device.

[0037] In some embodiments of the present application, the first conductive member and the second conductive member are both connected to the insulating member by thermal riveting.

[0038] By adopting the above technical solution, the connection structure between the first conductive member and the insulating member and the connection structure between the second conductive member and the insulating member are effectively simplified, thereby further reducing the production cost of the battery device.

[0039] In a second aspect, an embodiment of the present application further provides an energy storage device, comprising a battery device as described in any one of the above embodiments, and the battery device is used to store or provide electrical energy.

[0040] The energy storage device provided in the embodiments of the present application has at least the following beneficial effects: the energy storage device provided in the embodiments of the present application adopts the battery device described in any of the above embodiments, thereby effectively reducing the production cost of the energy storage device.

[0041] In a third aspect, an embodiment of the present application further provides an energy storage system, comprising a power conversion device and the above-mentioned energy storage device, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

[0042] The energy storage system provided by the embodiments of the present application has at least the following beneficial effects: the energy storage system provided by the embodiments of the present application adopts the energy storage device described in any of the above embodiments, thereby effectively reducing the production cost of the energy storage system.

[0043] In a fourth aspect, an embodiment of the present application further provides an electrical device, comprising the battery device, the energy storage device or the energy storage system described in any one of the above embodiments, wherein the battery device is used to store or provide electrical energy.

[0044] The electric device provided in the embodiments of the present application has at least the following beneficial effects: the electric device provided in the embodiments of the present application adopts the battery device, the energy storage device or the energy storage system described in any one of the above embodiments, thereby effectively reducing the production cost of the electric device.

[0045] In a fifth aspect, an embodiment of the present application further provides a charging network, including a charging pile, and the above-mentioned energy storage device or the above-mentioned energy storage system, wherein the energy storage device is used to provide electrical energy for the charging pile.

[0046] The charging network provided in the embodiment of the present application has at least the following beneficial effects: the charging network provided in the embodiment of the present application adopts the above-mentioned energy storage device or the above-mentioned energy storage system, thereby effectively reducing the production cost of the charging network. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0048] Figure 1 A schematic diagram of the structure of the energy storage system provided in the embodiment of the present application;

[0049] Figure 2 A schematic diagram of the structure of a charging network provided in an embodiment of the present application;

[0050] Figure 3 A schematic diagram of the structure of a vehicle provided in an embodiment of the present application;

[0051] Figure 4 A schematic diagram of the exploded structure of a battery device provided in an embodiment of the present application;

[0052] Figure 5 for Figure 4 A schematic diagram of the structure of an insulating member in the battery device shown;

[0053] Figure 6 for Figure 5 A schematic diagram of the enlarged structure of the insulating member shown;

[0054] Figure 7 for Figure 4 A schematic diagram of the structure of a control module in the battery device shown;

[0055] Figure 8 for Figure 4 Schematic diagram of the structure of the thermal insulation component in the battery device shown.

[0056] Among them, the reference numerals in the figure are:

[0057] 1. Energy storage device; 2. Power conversion equipment; 3. Power generation equipment; 4. Charging pile; 5. Connector;

[0058] 1000. Vehicles;

[0059] 100, battery device; 10, battery cell; 11, first electrode terminal; 12, second electrode terminal; 20, sampling module; 21, insulating member; 211, insulating body; 2111, first electrode lead-out hole; 2112, second electrode lead-out hole; 212, first connection structure; 2121, support part; 21211, support surface; 2122, first connection part; 213, second connection structure; 2131, second connection part; 214, third connection structure; 2141, third connection part; 215, fourth connection structure; 2151, fourth connection part; 22, sampling assembly; 221, first conductive member; 222, second conductive member; 223, first circuit member; 224, second circuit member; 30, control module; 31, first connection hole; 40, heat insulating member; 41, second connection hole; 42, avoidance hole;

[0060] 200, controller;

[0061] 300. Motor. DETAILED DESCRIPTION

[0062] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0063] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or indirectly connected to the other element.

[0064] It should be understood that the terms "length", "width", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0065] In addition, the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Thus, a feature defined as "first", "second", "third", and "fourth" may explicitly or implicitly include one or more of the feature. In the description of this application, the meaning of "plurality" is two or more, unless otherwise clearly and specifically defined.

[0066] At present, judging from the development of the market situation, the application of battery devices is becoming more and more extensive. Battery devices are not only used in energy storage systems such as hydropower, thermal power, wind power and solar power stations, but are also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application fields, the market demand is also constantly expanding, and higher requirements are also put forward for the production cost of battery devices.

[0067] The battery device generally includes a battery cell, a sampling module, a control module and a heat insulator. The battery cell is the smallest storage unit for storing electrical energy. The sampling module is used to electrically connect the battery cell to the control module to collect the working status signal of the battery cell and transmit the working status signal of the battery cell to the control module so that the control module can monitor the working status of the battery cell. The heat insulator is arranged between the battery cell and the control module to isolate the heat transfer between the battery cell and the control module.

[0068] In the related art, the battery device also includes a fixed bracket, which can be fixedly connected to the box of the battery device or to the insulating member of the sampling module. The control module and the thermal insulation member are both fixedly mounted on the fixed bracket. For example, the fixed bracket is provided with a snap structure, and the control module and the thermal insulation member are fixedly mounted on the fixed bracket through the snap structure. However, since the fixed bracket is used to fix the control module and the thermal insulation member, not only the number of parts of the battery device is increased, but also in the process of assembling the battery device, it is necessary to assemble the fixed bracket, and to assemble the control module and the thermal insulation member to the fixed bracket. There are many assembly steps, which is not conducive to reducing the production cost of the battery device.

[0069] In order to reduce the production cost of the battery device, the control module and the thermal insulation member in the battery device provided in the embodiment of the present application are directly connected to the insulating member to integrate the control module, the thermal insulation member and the sampling module into a whole. In this way, there is no need to use an additional bracket to fix the control module and the thermal insulation member, thereby effectively reducing the number of components of the battery device and effectively reducing the production cost of the battery device.

[0070] The battery device provided in the embodiment of the present application is applicable to various energy storage devices and power consumption devices using battery cells. Figure 4 , Figure 4Schematic diagram of the exploded structure of the battery device 100 provided in the embodiment of the present application. The battery device 100 (Battery Apparatus) may include one or more battery cell assemblies for providing voltage and capacity. The battery cell assembly (Battery Cell Assembly) may include a plurality of battery cells 10, and the plurality of battery cells 10 are connected in series, in parallel, or in mixed connection through a busbar component.

[0071] In some embodiments, a battery cell assembly is generally formed by arranging a plurality of battery cells 10 .

[0072] As an example, the battery cell assembly may be a battery module (Battery Module), and the battery module is formed by arranging and fixing a plurality of battery cells 10 to form an independent module. As an example, the battery module may be formed by bundling a plurality of battery cells 10 by a cable tie.

[0073] In some embodiments, the battery device 100 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.

[0074] 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.

[0075] As an example, the battery cell assembly may also be housed in the box by directly fixing the plurality of battery cells 10 to the box.

[0076] 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.

[0077] 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.

[0078] In some embodiments, the box can be used as part of the chassis structure of the vehicle 1000. For example, part of the box can become at least part of the floor of the vehicle 1000, or part of the box can become at least part of the cross beam and longitudinal beam of the vehicle 1000.

[0079] The energy storage device 1 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 1 may include one or more battery clusters to increase the voltage and capacity of the energy storage device 1. The battery cluster may include multiple battery devices 100, and the multiple battery devices 100 are connected in series through a busbar to increase the voltage of the energy storage device 1. When the energy storage device 1 includes multiple battery clusters, the multiple battery clusters are connected in parallel to increase the capacity of the energy storage device 1. The energy storage device 1 can store electrical energy as needed and output electrical energy at an appropriate time. For example, the energy storage device 1 can store electrical energy during low power consumption and provide electrical energy to relevant users or electrical equipment during peak power consumption.

[0080] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0081] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, wherein the battery clusters are accommodated in the cabinet.

[0082] In some embodiments, the energy storage device 1 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.

[0083] As an example, the thermal management module may include a liquid cooling unit that provides cooling liquid for adjusting the temperature of the battery cells 10 to each battery device 100 through a pipeline.

[0084] 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), a fusion switch and other modules.

[0085] As an example, the master control module can be used as a battery management unit of the energy storage device 1 to monitor and manage the energy storage device 1. The master control module can monitor information such as the current, voltage, power, state of charge or temperature of the energy storage device 1. For example, the charging and discharging current and voltage of the energy storage device 1 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.

[0086] As an example, the fire protection module includes a control panel, a detector, an alarm device, etc., which are used to detect, alarm or extinguish fire in the energy storage system.

[0087] As an example, the power distribution module can be used to distribute power to modules in the energy storage device 1 that require power.

[0088] See also Figure 1 , Figure 1 A schematic diagram of the structure of the energy storage system provided in the embodiment of the present application. 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 1. The energy storage system may include one or more energy storage devices 1 and a power conversion device 2 (Power Converter System, PCS for short), and the power conversion device 2 is used to be connected between the power generation equipment 3 and the energy storage device 1. The power generation equipment 3 is used to generate electrical energy, and the electrical energy generated by the power generation equipment 3 can be stored in the energy storage device 1 through the power conversion device 2. As an example, the power generation equipment 3 can specifically be a solar panel, a hydropower generation equipment, a thermal power generation equipment, a wind power generation equipment, etc. Among them, the specific type of the power generation equipment 3 is not limited in this application.

[0089] See also Figure 2 , Figure 2 A schematic diagram of the structure of the charging network provided in the embodiment of the present application. The charging network provided in the embodiment of the present application can be any charging system that requires the use of the energy storage device 1. The charging network may include an energy storage device 1 and a charging pile 4, the charging pile 4 is electrically connected to the energy storage device 1, and the energy storage device 1 is used to provide electrical energy to the charging pile 4. The charging pile 4 is electrically connected to the battery device 100 in the energy storage device 1 through a cable, and the battery device 100 can provide its stored electrical energy to the charging pile 4. The charging pile 4 has one or more connectors 5, and the connector 5 is used to connect to an electrical device (such as a vehicle) so that the electrical device can be replenished with energy.

[0090] The electric device may be, but is not limited to, a mobile phone, a portable device, a laptop computer, a battery car, an electric toy, an electric tool, a vehicle 1000, a ship, and a spacecraft, etc. For example, a spacecraft includes an airplane, a rocket, a space shuttle, and a spacecraft, etc. For the convenience of description, the following embodiments are described by taking a vehicle 1000 as an example of an electric device in one embodiment of the present application.

[0091] See also Figure 3 , Figure 3A schematic diagram of the structure of a vehicle 1000 provided in an embodiment of the present application. A battery device 100 is provided inside the vehicle 1000, and the battery device 100 can be provided at the bottom, head, or tail of the vehicle 1000. The battery device 100 can be used to power the vehicle 1000, for example, the battery device 100 can 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 to power the motor 300, for example, for the starting, navigation, and working power requirements of the vehicle 1000 during driving.

[0092] 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.

[0093] The technical solution provided in the embodiments of the present application is described below with reference to the accompanying drawings.

[0094] First, please also refer to Figures 4 to 8 The embodiment of the present application provides a battery device 100, including a battery cell 10, a sampling module 20, a control module 30 and a heat insulating member 40. The sampling module 20 includes an insulating member 21 and a sampling assembly 22, wherein the insulating member 21 is disposed between the sampling assembly 22 and the battery cell 10, and the sampling assembly 22 is electrically connected to the battery cell 10. The control module 30 is electrically connected to the sampling assembly 22 and is directly connected to the insulating member 21. The heat insulating member 40 is disposed between the control module 30 and the insulating member 21 and is directly connected to the insulating member 21.

[0095] The battery cell 10 is the smallest unit for storing electric energy. The battery cell 10 can be a secondary battery or a primary battery. A secondary battery refers to a battery cell 10 that can be used continuously by activating the active material by charging after the battery cell 10 is discharged. A primary battery refers to a battery cell 10 that can be used continuously by not activating the active material by charging after the battery cell 10 is discharged. The battery cell 10 can also be a lithium-ion battery cell, a sodium-ion battery cell, a sodium-lithium-ion battery cell, a lithium metal battery cell, a sodium metal battery cell, a lithium-sulfur battery cell, a magnesium-ion battery cell, a nickel-hydrogen battery cell, a nickel-cadmium battery cell or a lead-acid battery cell. The battery cell 10 can be a cylindrical battery cell, a prismatic battery cell, a soft-pack battery cell or a battery cell 10 of other shapes. The prismatic battery cell includes a square-shell battery cell, a blade-shaped battery cell, and a multi-prismatic battery cell. The multi-prismatic battery cell is, for example, a hexagonal battery cell, etc., and there is no special limitation in this application.

[0096] In some embodiments, the battery cell 10 may include a housing, an electrode assembly, and electrode terminals.

[0097] The outer shell may include a shell and an end cap, wherein the shell is a component for providing an internal environment of the battery cell 10, wherein the internal environment may be used to accommodate the electrode assembly. The shell may be an independent component, and an opening may be provided on the shell. The internal environment of the battery cell 10 is formed by setting the end cap on the opening, and the electrode assembly is accommodated in the internal environment. Specifically, the shell and the end cap may form a common connection surface before other components are put into the shell, and when the interior of the shell needs to be encapsulated, the end cap is set on the opening of the shell. Optionally, the shell may be of various shapes and sizes, such as a rectangular parallelepiped, a cylindrical shape, a hexagonal prism, etc. Specifically, the shape of the shell may be determined according to the specific shape and size of the electrode assembly. The shell may be made of various materials, such as copper, iron, aluminum, stainless steel, aluminum alloy, etc., which are not specifically limited here.

[0098] The end cap refers to a component that is covered at the opening of the shell to isolate the internal environment of the battery cell 10 from the external environment. The shape of the end cap can be adapted to the shape of the shell to match the shell. In some embodiments, the end cap can be made of a material with a certain hardness and strength, so that the end cap is not easily deformed when squeezed and collided, so that the battery cell 10 can have a higher structural strength and the safety performance can also be improved. Of course, this embodiment does not make a sole limitation on the material of the end cap, and the end cap can be made of copper, iron, aluminum, stainless steel, aluminum alloy, plastic and other materials. In some embodiments, a pressure relief mechanism for releasing the internal pressure when the internal pressure or temperature of the battery cell 10 reaches a threshold value can also be provided on the end cap.

[0099] The electrode assembly is a component where electrochemical reactions occur in the battery cell 10. The battery cell 10 may include one or more electrode assemblies. The electrode assembly is mainly made of a positive electrode sheet, a negative electrode sheet and a separator by a winding process or a stacking process.

[0100] In some embodiments, the electrode assembly is a wound structure, wherein the positive electrode sheet and the negative electrode sheet are wound into a wound structure.

[0101] In some embodiments, the electrode assembly is a laminate structure.

[0102] As an example, a plurality of positive electrode sheets and a plurality of negative electrode sheets may be provided respectively, and the plurality of positive electrode sheets and the plurality of negative electrode sheets may be alternately stacked.

[0103] As an example, a plurality of positive electrode sheets may be provided, and the negative electrode sheet may be folded to form a plurality of stacked folded segments, with a positive electrode sheet being sandwiched between adjacent folded segments.

[0104] As an example, both the positive electrode sheet and the negative electrode sheet are folded to form a plurality of folded sections that are stacked.

[0105] As an example, a plurality of separators may be provided, each of which is provided between any adjacent positive electrode sheets or negative electrode sheets.

[0106] As an example, the separator may be disposed continuously, and may be disposed between any adjacent positive electrode sheets or negative electrode sheets by folding or winding.

[0107] During the charge and discharge process of the battery cell 10, active ions (such as lithium ions) are inserted and removed between the positive electrode and the negative electrode. The separator is arranged between the positive electrode and the negative electrode to prevent the positive and negative electrodes from short-circuiting and allow the active ions to pass through.

[0108] The positive electrode sheet may include a positive electrode current collector and a positive electrode active material disposed on at least one surface of the positive electrode current collector. The negative electrode sheet may include a negative electrode current collector and a negative electrode active material disposed on at least one surface of the negative electrode current collector.

[0109] In some embodiments, the battery cell 10 further includes an electrolyte, which plays a role in conducting ions between the positive electrode and the negative electrode. The present application has no specific restrictions on the type of electrolyte, which can be selected according to needs. The electrolyte can be liquid, gel or solid.

[0110] In some embodiments, the electrode assembly is provided with tabs, which can lead current out of the electrode assembly. The tabs include a positive tab and a negative tab, the positive tab is electrically connected to the positive electrode sheet, and the negative tab is electrically connected to the negative electrode sheet.

[0111] The electrode terminal is a component electrically connected to the electrode assembly for outputting the electric energy of the battery cell 10 or inputting the electric energy into the battery cell 10. The electrode terminal can be arranged on the end cap, a part of the electrode terminal extends into the internal environment of the battery cell 10 and is directly or indirectly connected to the pole ear of the electrode assembly, and the other part of the electrode terminal is exposed to the external environment of the battery cell 10 and is connected to the busbar, the sampling module 20 and other components. In some embodiments, the electrode terminal includes a first electrode terminal 11 and a second electrode terminal 12, the first electrode terminal 11 is electrically connected to the positive pole ear, and the second electrode terminal 12 is electrically connected to the negative pole ear. Optionally, the electrode terminal can be a columnar structure, such as a cylindrical structure, a prismatic structure, etc., the electrode terminal can also be a plate-like structure, such as a circular plate, a square plate, etc., and the electrode terminal can also be other irregular three-dimensional structures, which are not specifically limited here. The electrode terminal can be made of one metal material or a plurality of metal materials. The metal material can be, but is not limited to, copper, aluminum, nickel, zinc, iron, etc., which are not specifically limited here.

[0112] The sampling module 20 is electrically connected to a plurality of battery cells 10. As an example, the sampling module 20 is electrically connected to the electrode terminals of the battery cells 10 to collect the working state signals of the battery cells 10. The working state signals of the battery cells 10 may be, but are not limited to, temperature signals, voltage signals, current signals, pressure signals, etc. Among them, the sampling assembly 22 is the core component of the sampling module 20, and the sampling assembly 22 is used to electrically connect the battery cells 10 to collect the working state signals of the battery cells 10. The insulating member 21 is not only used to insulate and separate the other parts of the battery cells 10 except the electrode terminals from the sampling assembly 22, but also used to support and fix the sampling assembly 22.

[0113] In some embodiments, a plurality of battery cells 10 are arranged in sequence along a first direction to form a battery cell assembly, a plurality of battery cell assemblies are arranged in sequence along a second direction, the insulating member 21 is a plate-like structure, the insulating member 21 is covered on the plurality of battery cell assemblies, and the sampling assembly 22 is disposed on a side of the insulating member 21 that is away from the battery cell assembly, wherein the first direction and the second direction are perpendicular to each other.

[0114] In some embodiments, the sampling assembly 22 includes a first conductive member 221, a second conductive member 222, a first circuit member 223, and a second circuit member 224. The first conductive member 221 is electrically connected between the first circuit member 223 and the first electrode terminal 11, the second conductive member 222 is electrically connected between the second circuit member 224 and the second electrode terminal 12, and the first circuit member 223 and the second circuit member 224 are both electrically connected to the control module 30. The first conductive member 221 and the second conductive member 222 are both made of conductive materials, and the conductive materials may be, but are not limited to, copper, aluminum, stainless steel, etc. The first circuit member 223 is used to provide an electrical circuit for the control module 30 to be electrically connected to the first electrode terminal 11, and the second circuit member 224 is used to provide an electrical circuit for the control module 30 to be electrically connected to the second electrode terminal 12. The working state signal of the battery cell 10 can be transmitted to the control module 30 through the electrical circuit of the first circuit member 223 and the electrical circuit of the second circuit member 224.

[0115] In some embodiments, the first circuit component 223 and the second circuit component 224 are both flexible printed circuits (FPC for short).

[0116] Of course, in other embodiments, the first circuit component 223 and the second circuit component 224 may also be printed circuit boards (PCBs for short).

[0117] As an example, the insulating body 211 is provided with a first electrode lead-out hole 2111 and a second electrode lead-out hole 2112, and the first electrode terminal 11 is passed through the first electrode lead-out hole 2111 so that the first electrode terminal 11 is electrically connected to the first conductive member 221, and the second electrode terminal 12 is passed through the second electrode lead-out hole 2112 so that the second electrode terminal 12 is electrically connected to the second conductive member 222.

[0118] It can be understood that the number of first conductive members 221, the number of second conductive members 222, the number of first electrode lead-out holes 2111, and the number of second electrode lead-out holes 2112 are all multiple, the first electrode terminals 11 of multiple battery cells 10 are arranged in a one-to-one correspondence with the multiple first electrode lead-out holes 2111 and in a one-to-one correspondence with the multiple first conductive members 221, and the second electrode terminals 12 of multiple battery cells 10 are arranged in a one-to-one correspondence with the multiple second electrode lead-out holes 2112 and in a one-to-one correspondence with the multiple second conductive members 222.

[0119] The control module 30 is used to monitor the working state signal of the battery cell 10. Specifically, the control module 30 is electrically connected to the sampling component 22, and the sampling component 22 transmits the working state signal of the battery cell 10 to the control module 30. The control module 30 can adjust the working state of the battery cell 10 according to the working state signal of the battery cell 10. For example, the sampling component 22 is used to collect the temperature signal of the battery cell 10. The battery device 100 may also include a heat exchange module, which is electrically connected to the control module 30. When the working temperature of the battery cell 10 is too high or too low, the control module 30 can control the heat exchange module to perform heat exchange with the battery cell 10 to maintain the working temperature of the battery cell 10 within a suitable range.

[0120] The control module 30 is directly connected to the insulating part 21, which means that a connecting structure is provided on the insulating part 21 and / or the control module 30, and the control module 30 and the insulating part 21 are connected through the connecting structure, that is, the control module 30 and the insulating part 21 are connected through the connecting structure of the insulating part 21 itself and / or the connecting structure of the control module 30 itself, without relying on other connecting components to connect the control module 30 and the insulating part 21. The connecting structure can be but is not limited to a hot riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0121] The heat insulating member 40 is used to isolate the heat transfer between the battery cell 10 and the control module 30. It can be understood that the heat insulating member 40 is made of a heat insulating material, and the heat insulating material can be but is not limited to mica, foam, aerogel felt, etc. In some embodiments, the heat insulating member 40 is a plate-like structure, and the heat insulating member 40 is arranged on the side of the insulating member 21 facing away from the battery cell assembly, and the control module 30 is arranged on the side of the heat insulating member 40 facing away from the insulating member 21.

[0122] The direct connection between the thermal insulation member 40 and the insulating member 21 means that: a connecting structure is provided on the insulating member 21 and / or the thermal insulation member 40, and the thermal insulation member 40 and the insulating member 21 are connected through the connecting structure, that is, the thermal insulation member 40 and the insulating member 21 are connected through the connecting structure of the insulating member 21 itself and / or the connecting structure of the thermal insulation member 40 itself, without relying on other connecting components to connect the thermal insulation member 40 and the insulating member 21. The connecting structure can be but is not limited to a hot riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0123] The control module 30 and the thermal insulation member 40 in the battery device 100 provided in the embodiment of the present application are directly connected to the insulating member 21 to integrate the control module 30, the thermal insulation member 40 and the sampling module 20 into a whole. In this way, there is no need to use an additional bracket to fix the control module 30 and the thermal insulation member 40, thereby effectively reducing the number of components of the battery device 100 and effectively reducing the production cost of the battery device 100.

[0124] In addition, since there is no need to use additional brackets to fix the control module 30 and the heat insulating member 40 , the assembly process of the battery device 100 can be simplified, thereby effectively improving the production efficiency of the battery device 100 .

[0125] In some embodiments of this application, please refer to Figure 5 The insulating member 21 includes an insulating body 211 disposed between the sampling assembly 22 and the battery cell 10, a first connecting structure 212 connected to the insulating body 211, and a second connecting structure 213 connected to the insulating body 211. The first connecting structure 212 is used to connect the control module 30, and the second connecting structure 213 is used to connect the thermal insulation member 40.

[0126] The insulating body 211 is the main body of the insulating member 21 . The insulating body 211 is not only used to insulate and separate other parts of the battery cell 10 except the electrode terminals from the sampling assembly 22 , but also used to support and fix the sampling assembly 22 .

[0127] In some embodiments, the insulating body 211 is a plate-shaped structure, and the insulating body 211 is covered on multiple battery cell assemblies, and the first connection structure 212 and the second connection structure 213 are both arranged on the side of the insulating body 211 facing away from the battery cell assembly. It can be understood that the insulating body 211 is provided with the first electrode lead-out hole 2111 and the second electrode lead-out hole 2112.

[0128] The first connection structure 212 is used to connect the control module 30. It can be understood that the first connection structure 212 is fixed on the insulating body 211 and connected to the control module 30, so that the control module 30 and the insulating member 21 are connected to form a whole. The first connection structure 212 can be, but is not limited to, a hot riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0129] The second connection structure 213 is used to connect the heat insulating member 40. It can be understood that the second connection structure 213 is fixed on the insulating body 211 and connected to the heat insulating member 40, so that the heat insulating member 40 and the insulating member 21 are connected to form a whole. The second connection structure 213 can be, but is not limited to, a heat riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0130] By adopting the above technical solution, it is convenient to directly connect the control module 30 and the heat insulating member 40 to the insulating member 21 .

[0131] In some embodiments of the present application, the first connection structure 212 is connected to the control module 30 by heat riveting.

[0132] The hot riveting connection between the first connection structure 212 and the control module 30 refers to: heating at least a portion of the first connection structure 212 to melt and deform at least a portion of the first connection structure 212, and after the melted portion of the first connection structure 212 cools and solidifies, a restraining force is generated between the first connection structure 212 and the control module 30, thereby achieving the connection between the first connection structure 212 and the control module 30.

[0133] By adopting the above technical solution, the connection structure between the control module 30 and the insulating member 21 is effectively simplified, thereby further reducing the production cost of the battery device 100.

[0134] In some embodiments of this application, please refer to Figure 6 The first connection structure 212 includes a first connection portion 2122 . The control module 30 is provided with a first connection hole 31 . The first connection portion 2122 is passed through the first connection hole 31 and is connected to the control module 30 by heat riveting.

[0135] In some embodiments, the first connection portion 2122 is a columnar structure, and the first connection portion 2122 is inserted into the first connection hole 31. The end of the first connection portion 2122 away from the insulating body 211 is heated so that the end of the first connection portion 2122 away from the insulating body 211 melts and deforms to form a first constraint portion. The diameter of the first constraint portion is larger than the aperture of the first connection hole 31. After the first constraint portion is cooled and solidified, a constraint force is generated between the first connection structure 212 and the control module 30, thereby realizing the connection between the first connection structure 212 and the control module 30.

[0136] By adopting the above technical solution, it is convenient to connect the control module 30 to the insulating member 21 by thermal riveting.

[0137] In some embodiments of the present application, the second connection structure 213 is connected to the thermal insulation member 40 by heat riveting.

[0138] The hot riveting connection between the second connecting structure 213 and the thermal insulation member 40 refers to: heating at least a portion of the second connecting structure 213 to melt and deform at least a portion of the second connecting structure 213, and after the melted portion of the second connecting structure 213 cools and solidifies, a restraining force is generated between the second connecting structure 213 and the thermal insulation member 40, thereby achieving the connection between the second connecting structure 213 and the thermal insulation member 40.

[0139] By adopting the above technical solution, the connection structure between the heat insulating member 40 and the insulating member 21 is effectively simplified, thereby further reducing the production cost of the battery device 100.

[0140] In some embodiments of this application, please refer to Figure 6 The second connection structure 213 includes a second connection portion 2131 . The heat insulating member 40 is provided with a second connection hole 41 . The second connection portion 2131 is passed through the second connection hole 41 and is connected to the heat insulating member 40 by thermal riveting.

[0141] In some embodiments, the second connection portion 2131 is a columnar structure, and the second connection portion 2131 is inserted into the second connection hole 41. The end of the second connection portion 2131 away from the insulating body 211 is heated so that the end of the second connection portion 2131 away from the insulating body 211 melts and deforms to form a second constraint portion. The diameter of the second constraint portion is larger than the aperture of the second connection hole 41. After the second constraint portion is cooled and solidified, a constraint force is generated between the second connection structure 213 and the thermal insulation member 40, thereby realizing the connection between the second connection structure 213 and the thermal insulation member 40.

[0142] By adopting the above technical solution, it is convenient to connect the heat insulating member 40 and the insulating member 21 by heat riveting.

[0143] In some embodiments of this application, please refer to Figure 5 There are multiple first connection structures 212 , and at least some of the first connection structures 212 are arranged along the periphery of the control module 30 and connected to the side of the control module 30 .

[0144] In other embodiments of the present application, please refer to Figure 5 There are multiple first connection structures 212 , and at least some of the first connection structures 212 are connected to the middle of the control module 30 .

[0145] In some other embodiments of the present application, please refer to Figure 5 There are multiple first connection structures 212, at least a portion of the first connection structures 212 are separated and arranged along the periphery of the control module 30 and connected to the side of the control module 30, and at least another portion of the first connection structures 212 are connected to the middle of the control module 30.

[0146] The number of the first connection structures 212 may be determined according to actual application requirements, and may specifically be six, seven, eight, nine, ten, etc.

[0147] By adopting the above technical solution, the force between the insulating member 21 and the control module 30 can be made more uniform, thereby effectively improving the connection stability between the control module 30 and the insulating member 21 .

[0148] In some embodiments of this application, please refer to Figure 5 There are multiple second connection structures 213 , and at least some of the second connection structures 213 are arranged along the periphery of the thermal insulation member 40 and connected to the side of the thermal insulation member 40 .

[0149] In other embodiments of the present application, please refer to Figure 5 There are multiple second connection structures 213, and at least some of the second connection structures 213 are connected to the middle part of the thermal insulation member 40.

[0150] In some other embodiments of the present application, please refer to Figure 5 There are multiple second connection structures 213, at least a portion of the second connection structures 213 are separated and arranged along the periphery of the thermal insulation member 40 and connected to the side of the thermal insulation member 40, and at least another portion of the second connection structures 213 are connected to the middle of the thermal insulation member 40.

[0151] The number of the second connection structures 213 may be determined according to actual application requirements, and may specifically be six, seven, eight, nine, ten, etc.

[0152] By adopting the above technical solution, the force between the insulating member 21 and the thermal insulation member 40 can be made more uniform, thereby effectively improving the connection stability between the thermal insulation member 40 and the insulating member 21.

[0153] In some embodiments of the present application, the first connection structure 212 is also used to connect the sampling component 22 .

[0154] In some embodiments, the first circuit component 223 is provided with a third connection hole, the second circuit component 224 is provided with a fourth connection hole, the number of the first connection structures 212 is multiple, the first connection portion 2122 in at least a portion of the first connection structure 212 is passed through the third connection hole and the first connection hole 31 and is thermally riveted to the control module 30, and the first connection portion 2122 in at least another portion of the first connection structure 212 is passed through the fourth connection hole and the first connection hole 31 and is thermally riveted to the control module 30.

[0155] By adopting the above technical solution, the control module 30 and the sampling assembly 22 can share a connection structure, thereby effectively simplifying the structure of the battery device 100 and further reducing the production cost of the battery device 100.

[0156] In some embodiments of this application, please refer to Figure 6 The first connection structure 212 also includes a support portion 2121, which is connected between the insulating body 211 and the first connection portion 2122. The support portion 2121 has a support surface 21211 for supporting the control module 30. The distance between the support surface 21211 and the insulating body 211 is greater than or equal to the distance between the surface of the thermal insulation member 40 facing the control module 30 and the insulating body 211.

[0157] The support portion 2121 is a part for supporting the control module 30. It can be understood that after the control module 30 is connected to the first connection structure 212, the control module 30 is attached to the support surface 21211 so that a gap is formed between the control module 30 and the insulating body 211.

[0158] The distance between the supporting surface 21211 and the insulating body 211 is greater than or equal to the distance between the surface of the thermal insulation member 40 facing the control module 30 and the insulating body 211, which means that: the thermal insulation member 40 is arranged in the gap, and the width of the gap is greater than or equal to the distance between the surface of the thermal insulation member 40 facing the control module 30 and the insulating body 211, wherein the width of the gap refers to the minimum distance between the insulating body 211 and the control module 30.

[0159] In some embodiments, see Figure 8 The heat insulating member 40 is provided with an avoidance hole 42 , and the support portion 2121 is passed through the avoidance hole 42 to reduce the risk of interference between the first connection structure 212 and the heat insulating member 40 .

[0160] By adopting the above technical solution, it is convenient to dispose the heat insulating member 40 between the control module 30 and the insulating member 21 , thereby effectively reducing the risk of interference between the heat insulating member 40 and the control module 30 .

[0161] In some embodiments of this application, please refer to Figure 4 The first circuit component 223 and the second circuit component 224 are disposed on opposite sides of the control module 30 , and the control module 30 is disposed in the middle of the sampling component 22 along the length direction.

[0162] In some embodiments, the length direction of the sampling assembly 22 is parallel to the arrangement direction of the plurality of battery cells 10 in the battery cell assembly. In other words, the control module 30 is disposed between the first circuit component 223 and the second circuit component 224, and along the length direction of the sampling assembly 22, the control module 30 is disposed in the middle of the sampling assembly 22.

[0163] By adopting the above technical solution, the internal layout structure of the battery device 100 is effectively optimized, so that the internal structure of the battery device 100 becomes more compact, and the volume of the battery device 100 is effectively reduced.

[0164] In some embodiments of the present application, the first conductive member 221 and the second conductive member 222 are both directly connected to the insulating member 21 .

[0165] The direct connection between the first conductive member 221 and the insulating member 21 means that: a connecting structure is provided on the insulating member 21 and / or the first conductive member 221, and the first conductive member 221 and the insulating member 21 are connected through the connecting structure, that is, the first conductive member 221 and the insulating member 21 are connected through the connecting structure of the insulating member 21 itself and / or the connecting structure of the first conductive member 221 itself, without relying on other connecting components to connect the first conductive member 221 and the insulating member 21. The connecting structure may be but is not limited to a hot riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0166] The second conductive member 222 is directly connected to the insulating member 21, which means that a connecting structure is provided on the insulating member 21 and / or the second conductive member 222, and the second conductive member 222 is connected to the insulating member 21 through the connecting structure, that is, the second conductive member 222 is connected to the insulating member 21 through the connecting structure of the insulating member 21 itself and / or the connecting structure of the second conductive member 222 itself, without relying on other connecting components to connect the second conductive member 222 and the insulating member 21. The connecting structure may be, but is not limited to, a hot riveting structure, a snap-fit ​​structure, a plug-in structure, etc.

[0167] By adopting the above technical solution, there is no need to use additional connecting components to fix the first conductive member 221 and the second conductive member 222 , thereby further reducing the number of components of the battery device 100 and further reducing the production cost of the battery device 100 .

[0168] In some embodiments of the present application, the first conductive member 221 and the second conductive member 222 are both connected to the insulating member 21 by heat riveting.

[0169] In some embodiments, the insulating member 21 further includes a third connection structure 214, the third connection structure 214 includes a third connection portion 2141, the third connection portion 2141 is connected to the insulating body 211, the first conductive member 221 is provided with a fifth connection hole, the third connection portion 2141 is passed through the fifth connection hole and is connected to the first conductive member 221 by hot riveting. As an example, the third connection portion 2141 is a columnar structure, the third connection portion 2141 is passed through the fifth connection hole, and the end of the third connection portion 2141 away from the insulating body 211 is heated so that the end of the third connection portion 2141 away from the insulating body 211 is melted and deformed to form a third constraint portion, the diameter of the third constraint portion is greater than the aperture of the fifth connection hole, and after the third constraint portion is cooled and solidified, a constraint force is generated between the fifth connection structure and the first conductive member 221, thereby realizing the connection between the third connection structure 214 and the first conductive member 221.

[0170] In some embodiments, the insulating member 21 further includes a fourth connection structure 215, the fourth connection structure 215 includes a fourth connection portion 2151, the fourth connection portion 2151 is connected to the insulating body 211, the second conductive member 222 is provided with a sixth connection hole, the fourth connection portion 2151 is passed through the sixth connection hole and is connected to the second conductive member 222 by hot riveting. As an example, the fourth connection portion 2151 is a columnar structure, the fourth connection portion 2151 is passed through the sixth connection hole, and the end of the fourth connection portion 2151 away from the insulating body 211 is heated so that the end of the fourth connection portion 2151 away from the insulating body 211 is melted and deformed to form a fourth constraint portion, the diameter of the fourth constraint portion is greater than the aperture of the sixth connection hole, and after the fourth constraint portion is cooled and solidified, a constraint force is generated between the fourth connection structure 215 and the second conductive member 222, thereby realizing the connection between the fourth connection structure 215 and the second conductive member 222.

[0171] By adopting the above technical solution, the connection structure between the first conductive member 221 and the insulating member 21 and the connection structure between the second conductive member 222 and the insulating member 21 are effectively simplified, thereby further reducing the production cost of the battery device 100 .

[0172] In a second aspect, an embodiment of the present application further provides an energy storage device 1, comprising the battery device 100 described in any one of the above embodiments, and the battery device 100 is used to store or provide electrical energy.

[0173] The energy storage device 1 provided in the embodiment of the present application adopts the battery device 100 described in any of the above embodiments, thereby effectively reducing the production cost of the energy storage device 1.

[0174] Third, see Figure 1The embodiment of the present application also provides an energy storage system, including a power conversion device and the above-mentioned energy storage device 1, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device 1.

[0175] The energy storage system provided in the embodiment of the present application adopts the energy storage device 1 described in any of the above embodiments, thereby effectively reducing the production cost of the energy storage system.

[0176] Fourth, please refer to Figure 3 The embodiment of the present application further provides an electrical device, comprising the battery device 100, the energy storage device 1 or the energy storage system described in any one of the above embodiments, wherein the battery device 100 is used to store or provide electrical energy.

[0177] The electric device provided in the embodiment of the present application adopts the battery device 100, the energy storage device 1 or the energy storage system described in any of the above embodiments, thereby effectively reducing the production cost of the electric device.

[0178] Fifth, please refer to Figure 2 The embodiment of the present application further provides a charging network, including a charging pile 4 and the above-mentioned energy storage device 1 or the above-mentioned energy storage system, wherein the energy storage device 1 is used to provide electrical energy to the charging pile 4 .

[0179] The charging network provided in the embodiment of the present application adopts the above-mentioned energy storage device 1 or the above-mentioned energy storage system, thereby effectively reducing the production cost of the charging network.

[0180] The above description is only a preferred embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present application should be included in the protection scope of the present application.

Claims

1. A battery device, characterized in that: The battery device comprises: Battery cells; The sampling module comprises an insulating member and a sampling assembly, wherein the insulating member is disposed between the sampling assembly and the battery cell, and the sampling assembly is electrically connected to the battery cell; A control module, electrically connected to the sampling assembly and directly connected to the insulating member; The heat insulating member is disposed between the control module and the insulating member and is directly connected to the insulating member.

2. The battery device according to claim 1, wherein: The insulating member includes an insulating body disposed between the sampling assembly and the battery cell, a first connecting structure connected to the insulating body, and a second connecting structure connected to the insulating body, wherein the first connecting structure is used to connect the control module, and the second connecting structure is used to connect the thermal insulation member.

3. The battery device according to claim 2, characterized in that: The first connection structure is connected to the control module by thermal riveting.

4. The battery device according to claim 3, characterized in that: The first connection structure includes a first connection portion. The control module is provided with a first connection hole. The first connection portion is passed through the first connection hole and is connected to the control module by thermal riveting.

5. The battery device according to claim 2, wherein: The second connection structure is connected to the thermal insulation member by thermal riveting.

6. The battery device according to claim 5, characterized in that: The second connection structure includes a second connection portion, the heat insulating member is provided with a second connection hole, the second connection portion is passed through the second connection hole and is connected to the heat insulating member by thermal riveting.

7. The battery device according to claim 2, characterized in that: The number of the first connection structures is multiple; At least part of the first connection structures are arranged along the periphery of the control module and connected to the side of the control module; and / or, At least a portion of the first connection structure is connected to a middle portion of the control module.

8. The battery device according to claim 2, wherein: The number of the second connection structures is multiple; At least part of the second connection structures are arranged along the periphery of the thermal insulation element and connected to the side of the thermal insulation element; and / or, At least a portion of the second connection structure is connected to a middle portion of the thermal insulation element.

9. The battery device according to claim 2, wherein: The first connection structure is also used to connect the sampling component.

10. The battery device according to claim 2, wherein: The first connecting structure includes a supporting portion and a first connecting portion, the supporting portion is connected between the insulating body and the first connecting portion, the first connecting portion is used to connect the control module, the supporting portion has a supporting surface for supporting the control module, and the distance between the supporting surface and the insulating body is greater than or equal to the distance between the surface of the thermal insulation component facing the control module and the insulating body.

11. The battery device according to claim 10, characterized in that: The heat insulating member is provided with an avoidance hole, and the support portion is passed through the avoidance hole.

12. The battery device according to any one of claims 1 to 11, characterized in that: The sampling component includes a first circuit component and a second circuit component, the battery cell includes a first electrode terminal electrically connected to the first circuit component and a second electrode terminal electrically connected to the second circuit component, the first circuit component and the second circuit component are both electrically connected to the control module and are arranged on opposite sides of the control module, and the control module is arranged in the middle of the sampling component along the length direction.

13. The battery device according to any one of claims 1 to 11, characterized in that: The sampling component includes a first conductive member, a second conductive member, a first circuit member, and a second circuit member. The battery cell includes a first electrode terminal and a second electrode terminal. The first conductive member is electrically connected between the first circuit member and the first electrode terminal. The second conductive member is electrically connected between the second circuit member and the second electrode terminal. Both the first circuit member and the second circuit member are electrically connected to the control module.

14. The battery device according to claim 13, wherein: The first conductive member and the second conductive member are both directly connected to the insulating member.

15. The battery device according to claim 14, characterized in that: The first conductive member and the second conductive member are both connected to the insulating member by thermal riveting.

16. An energy storage device, characterized in that: The energy storage device comprises a battery device as claimed in any one of claims 1 to 15, and the battery device is used to store or provide electrical energy.

17. An energy storage system, characterized in that: The energy storage system comprises a power conversion device and the energy storage device according to claim 16, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

18. An electrical device, characterized in that: The electrical device comprises a battery device as described in any one of claims 1 to 15, an energy storage device as described in claim 16, or an energy storage system as described in claim 17, and the battery device is used to store or provide electrical energy.

19. A charging network, characterized in that: The charging network includes a charging pile, and an energy storage device as claimed in claim 16 or an energy storage system as claimed in claim 17, wherein the energy storage device is used to provide electrical energy to the charging pile.

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