Battery device and electric device

Abstract

The utility model belongs to the technical field of battery production, and provides a battery device and a power utilization device.The battery device comprises a battery monomer assembly and a current acquisition part; the battery monomer assembly comprises a plurality of battery monomers, the plurality of battery monomers are connected in series and / or in parallel to form a circuit, the plurality of battery monomers comprise a first battery monomer, the first battery monomer comprises a first electrode terminal, and the first electrode terminal is a positive electrode output end or a negative electrode output end of the circuit formed by connecting in series and / or in parallel; the current acquisition component comprises an acquisition part and a connection part; the acquisition part is used for acquiring a current signal flowing through the connection part; the current acquisition part is arranged adjacent to the first battery monomer, and the connecting part is electrically connected with the first electrode terminal. The utility model aims to improve the accuracy of current acquisition.

Description

Technical Field

[0001] This application relates to the field of battery manufacturing technology, and in particular to a battery device and an electrical device. Background Technology

[0002] In today's battery applications, whether in electric vehicles, energy storage systems, or various portable electronic devices, increasingly higher demands are being placed on battery performance and reliability. Accurate acquisition of battery current data is crucial for battery management systems, directly impacting battery status assessment, charge / discharge control, and battery lifespan extension. However, existing battery devices have several shortcomings in areas such as the installation method of current acquisition components, the connection structure with individual battery cells, and the overall layout.

[0003] Currently, common current acquisition components are usually associated with the high-voltage box, which makes the connection path between the current acquisition component and the battery cell assembly complex and has a large resistance. This not only reduces the current transmission efficiency, but also causes deviations in the acquired current data, seriously affecting the measurement accuracy. Utility Model Content

[0004] The purpose of this application is to provide a battery device and an electrical device, which aims to solve the technical problem of high resistance between the current acquisition component and the battery cell assembly, which affects the accuracy of current measurement.

[0005] In a first aspect, this application provides a battery device, comprising:

[0006] A battery cell assembly includes multiple battery cells connected in series and / or in parallel to form a circuit. Among the multiple battery cells, there is a first battery cell. The first battery cell includes a first electrode terminal, which is the positive or negative output terminal of the circuit connected in series and / or in parallel.

[0007] The current acquisition component includes an acquisition part and a connection part. The acquisition part is used to acquire the current signal flowing through the connection part. The current acquisition component is disposed adjacent to the first battery cell, and the connection part is electrically connected to the first electrode terminal.

[0008] In this embodiment, by configuring an independent acquisition unit and a connection unit, the connection unit is electrically connected to the first electrode terminal. The acquisition unit acquires the current on the connection unit, thereby obtaining the current on the battery cell assembly. This allows the current acquisition component to be set adjacent to the first battery cell in the battery cell, thereby shortening the current transmission path between the battery cell assembly and the current acquisition component, effectively reducing resistance, reducing losses and interference during current transmission, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system.

[0009] In one embodiment, the battery device further includes a conductive sheet, one end of which is connected to a first electrode terminal, and the other end of which is connected to a connecting portion.

[0010] In this embodiment, the first electrode terminal and the connecting part are directly electrically connected by conductive sheets, so that the acquisition unit can directly acquire the current signal flowing through the connecting part. The connecting part can be set close to the first electrode terminal, and the length of the conductive sheet is reduced, thereby shortening the current transmission path between the first battery cell and the current acquisition component, effectively reducing resistance, reducing loss and interference in the current transmission process, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system.

[0011] In one embodiment, multiple battery cells are arranged along a first direction, and along the first direction, the connecting portion is provided corresponding to the first electrode terminal.

[0012] In this embodiment, the connecting part and the first electrode terminal are arranged in the first direction, which facilitates the connection of the conductive sheet to the connecting part and the first electrode terminal respectively, and helps to shorten the length of the conductive sheet, reduce resistance, and improve the accuracy of current detection.

[0013] In one embodiment, the connecting surface of the connecting portion is flush with the connecting surface of the first electrode terminal, and the conductive sheet extends along the first direction.

[0014] In this embodiment, the connecting surface of the first electrode terminal is flush with the connecting surface of the connecting part, which can further shorten the length of the conductive sheet, thereby reducing the resistance of the conductive sheet and improving the current acquisition accuracy.

[0015] In one embodiment, the conductive sheet is welded to or locked to the connecting portion.

[0016] In this embodiment, welding improves connection stability and reduces resistance. The locking mechanism ensures connection stability between the conductive sheet and the connector, while also facilitating the installation and removal of the conductive sheet and the current acquisition component, thus providing convenience for later maintenance and adjustment.

[0017] In one embodiment, the battery device further includes a mounting base to which the current acquisition component is connected.

[0018] In this embodiment, by setting a mounting base and directly connecting the acquisition part and the connection part to the mounting base, the conductive sheet is directly electrically connected between the current acquisition component and the battery cell assembly, thereby shortening the current transmission path between the battery cell assembly and the current acquisition component and effectively reducing the resistance.

[0019] In one embodiment, the current acquisition component and the mounting base are integrally formed.

[0020] In this embodiment, the integrally molded current acquisition component and mounting base can improve the stability of the overall structure, which helps to reduce changes in contact resistance and improve the reliability of current acquisition.

[0021] In one embodiment, the battery device includes a housing assembly having a receiving cavity in which a battery cell assembly is housed; a mounting base is mounted on the housing assembly.

[0022] In this embodiment, the mounting base can be connected to the housing assembly to minimize the distance from the first electrode terminal, thereby shortening the length of the conductive sheet, reducing the resistance, and improving the accuracy of current acquisition.

[0023] In one embodiment, the box assembly includes a box frame and a box beam, the box beam being disposed within a receiving cavity and connected to the box frame, and a mounting base being connected to the box frame or the box beam.

[0024] In this embodiment, the mounting base can be connected to the box frame or box beam to minimize the distance from the first electrode terminal, thereby shortening the length of the conductive sheet, reducing the resistance, and improving the accuracy of current acquisition.

[0025] Secondly, this application provides an electrical device, including a battery device as described in any of the above, the battery device being used to store or provide electrical energy.

[0026] The above description is only an overview of the technical solution of this application. In order to better understand the technical means of this application and to implement it in accordance with the contents of the specification, and to make the above and other objects, features and advantages of this application more obvious and understandable, the following are specific embodiments of this application. Attached Figure Description

[0027] To more clearly illustrate the technical solutions of the embodiments of this application, the drawings used in the description of the embodiments of this application or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This application provides structural schematic diagrams of vehicles for some embodiments;

[0029] Figure 2 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 1 ;

[0030] Figure 3 Schematic diagram of the exploded structure of the battery device provided in some embodiments of this application Figure 2 ;

[0031] Figure 4 Schematic diagram of the structure of the battery device provided in some embodiments of this application Figure 1 ;

[0032] Figure 5 Schematic diagram of the structure of the battery device provided in some embodiments of this application Figure 2 ;

[0033] Figure 6 This is a schematic diagram showing the connection between the mounting base and the current acquisition component in a battery device provided in some embodiments of this application;

[0034] Figure 7 for Figure 5 A magnified view of a portion of position A in the middle;

[0035] Figure 8 Schematic diagram of the structure of the battery device provided in some embodiments of this application Figure 3 ;

[0036] Figure 9 This application provides schematic diagrams of the structure in which conductive sheets are connected to the first electrode terminal and the connecting portion in some embodiments of the battery device. Figure 1 ;

[0037] Figure 10 This application provides schematic diagrams of the structure in which conductive sheets are connected to the first electrode terminal and the connecting portion in some embodiments of the battery device. Figure 2 .

[0038] Explanation of reference numerals in the attached figures:

[0039] 1000, Vehicle; 1100, Battery Unit; 1110, Housing Assembly; 1111, First Part; 1112, Second Part; 1113, Receiving Cavity; 1114, Housing Frame; 1115, Housing Beam; 1120, Battery Cell Assembly; 1121, Battery Cell; 11211, First Battery Cell; 1122, First Electrode Terminal; 1130, Mounting Base; 1131, Base Body; 1132, Ear Mount; 1140, Current Acquisition Component; 1141, Acquisition Unit; 1142, Connecting Unit; 1150, Conductive Sheet; 1170, Distribution Box; 1180, Battery Management System; 1160, Locking Assembly; 1200, Controller; 1300, Motor; 1400, Wiring Harness; X, First Direction; Y, Second Direction. Detailed Implementation

[0040] The embodiments of the technical solution of this application will now be described in detail with reference to the accompanying drawings. These embodiments are only used to more clearly illustrate the technical solution of this application, and are therefore merely examples and should not be used to limit the scope of protection of this application.

[0041] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.

[0042] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.

[0043] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0044] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0045] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple groups" refers to two or more (including two groups), and "multiple pieces" refers to two or more (including two pieces).

[0046] In the description of the embodiments of this application, the technical terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing the embodiments of this application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this application.

[0047] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0048] In today's battery applications, whether in electric vehicles, energy storage systems, or various portable electronic devices, increasingly higher demands are being placed on battery performance and reliability. Accurate acquisition of battery current data is crucial for battery management systems, directly impacting battery status assessment, charge / discharge control, and battery lifespan extension. However, existing battery devices have several shortcomings in areas such as the installation method of current acquisition components, the connection structure with individual battery cells, and the overall layout.

[0049] Currently, common current acquisition components are usually associated with the high-voltage box, making the connection path between the current acquisition component and the battery cell assembly complex and resulting in high resistance. This not only reduces current transmission efficiency but also causes deviations in the acquired current data, severely affecting measurement accuracy. For example, in related technologies, the current acquisition component is installed inside the high-voltage box. When designing the electrical connection structure between the current acquisition component and the battery cell assembly, the battery cell assembly is first connected to a first connector structure to lead the current out to the outside of the box assembly. Then, a second connector structure is added and extended into the high-voltage box to establish electrical connection with the current acquisition component inside the high-voltage box. It can be seen that in the above structure, at least two connector structures and multiple transitions are required to connect the battery cell assembly and the current acquisition component. The long connection path between the battery cell assembly and the current acquisition component significantly increases the resistance between them. The resistance between the battery cell assembly and the current acquisition component directly affects the current transmission efficiency, leading to deviations in the acquired current data.

[0050] In view of this, this application provides a battery device in which an independent current acquisition component is configured, and the connection part of the current acquisition component is electrically connected to the first electrode terminal. The current on the connection part is acquired by the acquisition component, thereby obtaining the current on the battery cell assembly. The current acquisition component is detached from the power distribution box (or high voltage box) and arranged adjacent to the first battery cell in the battery cell assembly, thereby shortening the connection path between the current acquisition component and the battery cell assembly. This helps to reduce the resistance between the current acquisition component and the battery cell assembly, reduce the loss and interference in the current transmission process, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system.

[0051] Specifically, refer to Figure 2 and Figure 4 As shown, this application embodiment provides a battery device 1100, which includes a battery cell assembly 1120 and a current acquisition component 1140. The battery cell assembly 1120 includes a plurality of battery cells 1121, which are connected in series and / or in parallel to form a circuit. Among the plurality of battery cells 1121, there is a first battery cell 11211, which includes a first electrode terminal 1122. The first electrode terminal 1122 is the positive or negative output terminal of the circuit formed by the series and / or parallel connections. The current acquisition component 1140 includes a acquisition part 1141 and a connection part 1142. The acquisition part 1141 is used to acquire the current signal flowing through the connection part 1142. The current acquisition component 1140 is disposed adjacent to the first battery cell 11211, and the connection part 1142 is electrically connected to the first electrode terminal 1122.

[0052] The battery apparatus 1100 may include one or more battery cell assemblies 1120 for providing voltage and capacity. Each battery cell assembly 1120 may include multiple battery cells 1121 connected in series and / or in parallel via a busbar, where series and / or parallel connections include series, parallel, or mixed connections. Each battery cell 1121 is the smallest unit comprising the battery apparatus 1100. Each battery cell 1121 may be a secondary battery cell 1121 or a primary battery cell 1121; it may also be a lithium-sulfur battery cell 1121, a sodium-ion battery cell 1121, or a magnesium-ion battery cell 1121, but is not limited thereto. Each battery cell 1121 may be cylindrical, flat, cuboid, or other shapes.

[0053] The circuit formed by connecting multiple battery cells 1121 in series and / or in parallel needs to have an output terminal. The battery cell 1121 with this output terminal is defined as the first battery cell 11211. The first battery cell 11211 has a first electrode terminal, which can be a positive terminal or a negative terminal. The first electrode terminal is the positive output terminal or the negative output terminal of the circuit formed by connecting multiple battery cells 1121 in series and / or in parallel.

[0054] The battery device 1100 disclosed in this application embodiment can be used in electrical devices that use the battery device 1100 as a power source or in various energy storage devices and energy storage systems that use the battery device 1100 as an energy storage element.

[0055] The battery device 1100 can also be a battery pack, which generally includes a housing assembly 1110 and one or more individual battery cells 1120, with the individual battery cells 1120 housed in the housing assembly 1110.

[0056] For the current acquisition component 1140, the acquisition unit 1141 is used to acquire current signals. The acquisition unit 1141 is electrically connected to the connection unit 1142 to obtain the current signal flowing through the connection unit 1142. The acquisition unit 1141 can specifically employ components such as a current sensor or a shunt. For example, the acquisition unit 1141 can generally adopt a structure based on the shunt principle. The acquisition unit 1141 internally includes a shunt resistor. When current flows through the shunt resistor, a voltage drop proportional to the current is generated. The current magnitude is calculated by measuring the voltage drop. The aforementioned structure based on the shunt principle has high accuracy and relatively low cost. The acquisition unit 1141 based on the shunt structure calculates the current by measuring the voltage drop across the shunt resistor and using Ohm's law.

[0057] For example, the acquisition unit 1141 can also employ a Hall effect current sensor structure. Utilizing a Hall element, when the magnetic field generated by the current acts on the Hall element, a Hall voltage proportional to the magnetic field strength is produced, thereby calculating the current. This Hall effect current sensor structure has the advantages of good electrical isolation and fast response speed. The Hall effect current sensor then converts the Hall voltage generated by the Hall element into an electrical signal output corresponding to the current after signal amplification and filtering.

[0058] For example, the acquisition unit 1141 can also employ a Rogowski coil structure. Through the principle of electromagnetic induction, it converts changes in the measured current into an induced voltage signal. This Rogowski coil structure is commonly used for AC high-current measurement, featuring wide bandwidth and a broad measurement range. When acquiring current using the Rogowski coil structure, the induced voltage signal is processed through integration and other operations to obtain an output signal proportional to the measured current, thereby achieving current acquisition.

[0059] To further illustrate the function of the current acquisition component 1140, the current acquisition component 1140 (specifically, the acquisition unit 1141) can also be communicatively connected to the battery management system 1180 to acquire current data. The battery management system 1180 can monitor the charging and discharging current of the battery device 1100 in real time. By connecting to the acquisition unit 1141, it can continuously acquire accurate current data. For example, in the case of an electric vehicle, the discharge current of the battery device 1100 will constantly change during driving. Based on the real-time data transmitted from the acquisition unit 1141, the battery management system 1180 can promptly understand the output power of the battery device 1100, and thus determine whether the battery device 1100 can meet the power requirements of the vehicle 1000, ensuring the stable operation of the vehicle 1000.

[0060] For the battery management system 1180, the main responsibility is to intelligently manage and maintain the battery system, monitor battery status, and ensure safe battery operation. The main functions of the battery management system 1180 include data acquisition, status detection, safety protection, charging control, energy management, and equalization management. It includes a main control unit, namely the battery management unit (BMU), which includes data acquisition circuitry, sensors, and a microcontroller (MCU) to process the collected data and communicate with other systems in the vehicle 1000. In a distributed architecture, the battery management system 1180 may also include slave control units (CSCs). The CSC is responsible for detecting a certain number of battery cells 1121 or modules, collecting voltage, current, and temperature data, and sending this information to the BMU. The CSC mainly includes sensors for detecting battery cells 1121 and data acquisition circuitry.

[0061] In this embodiment, by configuring an independent acquisition unit 1141 and a connection unit 1142, the connection unit 1142 is electrically connected to the first electrode terminal 1122. The acquisition unit 1141 acquires the current on the connection unit 1142, thereby obtaining the current on the battery cell assembly 1120. This allows the current acquisition component 1140 to be arranged adjacent to the first battery cell 11211 in the battery cell 1121, thereby shortening the current transmission path between the battery cell assembly 1120 and the current acquisition component 1140, effectively reducing resistance, reducing losses and interference during current transmission, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system 1180.

[0062] Reference Figure 3 and Figure 5-7As shown, in some embodiments, the battery device 1100 further includes a conductive sheet 1150, one end of which is connected to the first electrode terminal 1122, and the other end of which is connected to the connecting portion 1142.

[0063] Specifically, the conductive sheet 1150 is used to connect between the first electrode terminal 1122 and the connecting portion 1142, so as to achieve electrical connection between the battery cell assembly 1120 and the connecting portion 1142. The conductive sheet 1150 can be in the form of a strip conductive sheet, a bus structure, a flexible conductive strip, etc.

[0064] Specifically, the strip-shaped conductive sheet is typically made of a highly conductive metal material, such as copper or aluminum. The conductive sheet is elongated. In one embodiment, the conductive sheet 1150 is a strip-shaped conductive sheet made of copper, with its thickness and width matched to minimize its resistance and meet current transmission requirements. The advantages of the strip-shaped conductive sheet are its simple structure, ease of manufacture, and ability to effectively shorten the current transmission path. Due to its regular shape, the strip-shaped conductive sheet is also easy to connect and fix to the first electrode terminal 1122 during installation, which helps improve the space utilization of the battery device 1100.

[0065] The conductive sheet 1150 can also be part of a bus structure. The bus structure is usually made of a large area metal plate. Multiple connection points can be provided on the bus structure. The conductive sheet 1150 can be part of the bus structure and is connected between the first electrode terminal 1122 and the connection part 1142.

[0066] The flexible conductive strips used in conductive sheets are generally made of flexible conductive materials, such as flexible printed circuit boards (FPCs) or flexible metal braided strips. Flexible conductive strips are bendable and foldable, making them suitable for components with relatively flexible connection positions or those requiring adaptation to vibration and displacement. For example, in the battery unit 1100 of an electric vehicle, since the vehicle 1000 experiences vibration and displacement during operation, using flexible conductive strips can effectively reduce the risk of loosening or breakage of connections due to the relative movement of connecting components. Flexible conductive strips can also be flexibly bent according to the internal spatial layout of the battery unit 1100, better adapting to complex installation environments and improving the integration of the battery unit 1100.

[0067] In this embodiment, the first electrode terminal 1122 and the connecting part 1142 are directly electrically connected by the conductive sheet 1150, so that the acquisition unit 1141 can directly acquire the current signal flowing through the connecting part 1142. The connecting part 1142 can be arranged close to the first electrode terminal 1122. The length of the conductive sheet 1150 is reduced, thereby shortening the current transmission path between the first battery cell 11211 and the current acquisition component 1140, effectively reducing resistance, reducing loss and interference in the current transmission process, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system 1180.

[0068] Reference Figure 4 , Figure 5 and Figure 9 As shown, in some embodiments, a plurality of battery cells 1121 are arranged along a first direction X, and a connecting portion 1142 is provided corresponding to a first electrode terminal 1122 along the first direction X.

[0069] For example, multiple battery cells 1121 are housed in the receiving cavity 1113 of the housing assembly 1110. The first direction X is any direction within the receiving cavity 1113. The external shape of the housing assembly 1110 is rectangular. Therefore, the first direction X can be understood as the length direction or the width direction of the housing assembly 1110.

[0070] The battery cell assembly 1120 includes multiple battery cells 1121, which are arranged in the first direction X. This can be understood as the multiple battery cells 1121 being arranged in the first direction X to form a battery module. Of course, there can be multiple battery modules, and each battery module includes multiple battery cells 1121. The multiple battery cells 1121 in each battery module are all arranged along the first direction X. The multiple battery modules are arranged in the second direction Y, which is perpendicular to the first direction X. For example, the first direction X is the length direction, and the second direction Y is the width direction.

[0071] In this context, the first battery cell 11211 can be considered as the battery cell 1121 located at one end of a battery module situated on the side. The current acquisition component 1140 is positioned at one end of the battery cell assembly 1120 along the first direction X, that is, the current acquisition component 1140 is positioned adjacent to the first battery cell 11211. For example, multiple battery cells 1121 are arranged along the first direction X to form a battery module. Along the first direction X, the battery module has two ends, and the battery cell 1121 located at one of these ends is the first battery cell 11211. In this case, the current acquisition component 1140 is positioned adjacent to the first battery cell 11211.

[0072] Considering the need to minimize the distance between the connecting portion 1142 and the first electrode terminal 1122, the first electrode terminal 1122 is arranged adjacent to the first battery cell 11211 along the first direction X. This facilitates the electrical connection between the conductive sheet 1150, the first electrode terminal 1122, and the connecting portion 1142, which helps to shorten the distance between the first electrode terminal 1122 and the connecting portion. The large space at the end facilitates the placement of the current acquisition component 1140 and helps to reduce the interference between the current acquisition component 1140 and other components.

[0073] In this embodiment, the connecting portion 1142 and the first electrode terminal 1122 are arranged adjacent to each other in the first direction X, which facilitates the connection of the conductive sheet 1150 to the connecting portion 1142 and the first electrode terminal 1122 respectively, and helps to shorten the length of the conductive sheet 1150, reduce the resistance, and improve the current detection accuracy.

[0074] Reference Figure 9 As shown, in some embodiments, the connecting surface of the connecting portion 1142 is flush with the connecting surface of the first electrode terminal 1122, and the conductive sheet 1150 extends along the first direction X.

[0075] Specifically, the first electrode terminal 1122 can be understood as the protruding pole on the first battery cell 11211. Therefore, the end face of the pole is the connection surface of the first electrode terminal 1122.

[0076] The first electrode terminal 1122 includes a positive terminal and a negative terminal. Since one end of the conductive sheet 1150 needs to be connected to the first electrode terminal 1122, the current acquisition component 1140 and the first battery cell 11211 are arranged opposite each other in the first direction X, so that the connection portion 1142 and the first electrode terminal 1122 are spaced apart in the first direction X. The connection portion 1142 may have a connection surface, which may be flush with the connection surface of the first electrode terminal 1122 in the first direction X. Alternatively, it can be considered that in the direction perpendicular to the first direction X (the height direction of the battery cell 1121), the connection surface of the first electrode terminal 1122 and the connection surface of the connection portion 1142 are at the same height to achieve the purpose of being flush.

[0077] Therefore, the conductive sheet 1150 can be either a straight sheet or a flat plate. The straight-line extension distance of the conductive sheet 1150 along the first direction X is its length. Since the straight-line distance between two points is the shortest, the length of the conductive sheet 1150 is shortened to its minimum, thus shortening the current transmission path and further reducing its resistance. This configuration optimizes the current transmission path, reduces bends and turns during current transmission, lowers resistance, and improves the accuracy of current acquisition.

[0078] In this embodiment, the connection surface of the first electrode terminal 1122 is flush with the connection surface of the connection portion 1142, which can further shorten the length of the conductive sheet 1150, thereby reducing the resistance of the conductive sheet 1150 and improving the current acquisition accuracy.

[0079] Reference Figure 10 As shown, in some embodiments, the connecting surface of the connecting portion 1142 is offset from the connecting surface of the first electrode terminal 1122, and the conductive sheet 1150 extends along the first direction X and forms a bent portion.

[0080] In practical applications, situations may arise where the connecting surface of the connecting portion 1142 and the connecting surface of the first electrode terminal 1122 are not at the same height and therefore cannot be flush. In other words, the connecting surface of the connecting portion 1142 and the connecting surface of the first electrode terminal 1122 are misaligned in the height direction. In this case, the conductive sheet 1150 can be a bent sheet structure with a bent portion or step formed in the middle. Alternatively, the conductive sheet 1150 can be a flat plate, in which case it needs to be inclined between the connecting portion 1142 and the first electrode terminal 1122.

[0081] In some embodiments, the conductive sheet 1150 and the connecting portion 1142 are welded together or locked together.

[0082] On the one hand, when the conductive sheet 1150 is welded to the connecting part 1142, a robust metal connection structure is formed, improving the reliability of the connection between the conductive sheet 1150 and the connecting part 1142, and enhancing the stability and reliability of current transmission. This reduces current transmission interruptions or data fluctuations caused by loose connections. For example, in the electric vehicle 1000, frequent charging and discharging and vibrations during use place high demands on connection stability; welding connections can improve the accuracy of current acquisition under complex operating conditions. On the other hand, when the conductive sheet 1150 and the connecting part 1142 are welded, the tightness of the welded connection helps ensure good conductivity at the connection point and reduces contact resistance at the connection point, thereby improving the accuracy of current acquisition.

[0083] The limiting lock connection can be understood as a detachable electrical connection between the conductive sheet 1150 and the connecting part 1142. For example, the conductive sheet 1150 and the connecting part 1142 are connected and fixed by a locking structure. The locking structure can be a bolt assembly, which can be made of metal to be conductive. The locking structure can also be a snap-fit ​​structure, an elastic limiting structure, or a plug-in limiting structure, etc.

[0084] The detachable connection provides convenience for maintenance and repair of the connection part 1142 and the conductive plate 1150. When the current acquisition component 1140 or the conductive plate 1150 fails, maintenance personnel can quickly replace or repair the current acquisition component 1140 or the conductive plate 1150, shortening the downtime of the electrical device and improving the availability of the electrical device. In addition, the current acquisition component 1140 or the conductive plate 1150 can be replaced independently, which helps to reduce maintenance costs.

[0085] In this embodiment, welding improves connection stability and reduces resistance. The locking mechanism not only ensures the connection stability between the conductive sheet 1150 and the connecting part 1142, but also facilitates the installation and removal of the conductive sheet 1150 and the current acquisition component 1140, providing convenience for later maintenance and adjustment.

[0086] Reference Figure 4-6 As shown, in some embodiments, the battery device 1100 further includes a mounting base 1130, to which the current acquisition component 1140 is connected.

[0087] Specifically, the mounting base 1130 is mainly used to carry the current acquisition component 1140, that is, to carry the acquisition part 1141 and the connection part 1142. The mounting base 1130 can adopt various structural forms, such as plate structure, frame structure, integrated functional module structure and movable adjustable structure.

[0088] Specifically, the mounting base 1130 can adopt a plate-like structure and can be made of engineering plastic, which is simple in structure, easy to process, and low in cost. In one embodiment, the plastic mounting base 1130 is a rectangular plate with a positioning structure on its surface for injection molding, ensuring a tight fit with the current acquisition component 1140. During installation, it is connected to the housing assembly 1110 via the locking assembly 1160, providing stable support for the current acquisition component 1140. The aforementioned mounting base 1130 is lightweight and has good insulation performance, making it suitable for scenarios with requirements for weight and electrical isolation.

[0089] The frame-structured mounting base 1130 may include multiple support beams to provide good structural strength and stability. Dedicated slots or protrusions may be provided inside the frame for securing the acquisition unit 1141 and the connecting unit 1142. For example, in a large energy storage battery device 1100, a metal frame-structured mounting base 1130 may also be used, which better resists vibration and impact, ensuring stable operation of the current acquisition component 1140 under complex working conditions. The frame-structured mounting base 1130 also facilitates wiring and management of internal components, optimizing the internal layout of the battery device 1100.

[0090] The integrated functional module mounting bracket 1130 can integrate multiple functional modules, such as a heat dissipation module and a signal conditioning module. In some electric vehicle battery devices 1100 with high battery performance requirements, the mounting bracket 1130 is made of aluminum alloy and integrates heat dissipation fins to effectively dissipate the heat generated by the current acquisition component 1140 during operation, improving its operational stability and lifespan. Simultaneously, it can also integrate a signal conditioning circuit to perform preliminary processing on the acquired current signal, reducing signal interference and improving current acquisition accuracy.

[0091] The adjustable, movable mounting base 1130 allows for adjustment of the position and angle of the current acquisition component 1140 according to actual needs. In some special applications, such as battery devices 1100 in the aerospace field, where space is limited and installation requirements are stringent, the adjustable mounting base 1130, through bolted connections and a sliding guide rail structure, can flexibly adjust the position of the current acquisition component 1140 to adapt to different installation requirements, ensuring that the performance of the entire battery device 1100 is not affected.

[0092] In this embodiment, by setting a mounting base 1130 and directly connecting the acquisition unit 1141 and the connection unit 1142 to the mounting base 1130, the conductive sheet 1150 is directly electrically connected between the current acquisition component 1140 and the battery cell assembly 1120. The current acquisition component 1140 can then be connected to the battery management system 1180, thereby shortening the current transmission path between the battery cell assembly 1120 and the current acquisition component 1140, effectively reducing resistance, reducing losses and interference during current transmission, thereby improving the accuracy of current acquisition and providing more reliable data support for the battery management system 1180.

[0093] In some embodiments, the current acquisition component 1140 and the mounting base 1130 are integrally formed.

[0094] Specifically, the integrated molding structure means that the current acquisition component 1140 is located on the mounting base 1130 and forms an integrated structure with the mounting base 1130. That is, the acquisition part 1141 and the connecting part 1142 are both integrally molded on the mounting base. For example, during the molding process of the mounting base 1130, the current acquisition component 1140 is directly disposed during the molding process, so that the current acquisition component 1140 is connected and fixed to the mounting base 1130 at the same time as the mounting base 1130 is formed.

[0095] The current acquisition component 1140 and the mounting base 1130 are integrally molded, which reduces the likelihood of unfavorable connection gaps between them and enhances the stability of the connection. During the operation of the battery device 1100, this also helps reduce the risk of connection loosening due to vibration, impact, and other factors, thereby reducing changes in contact resistance and making current acquisition more stable and accurate.

[0096] For example, during the bumpy driving process of an electric vehicle, the integrated current acquisition component 1140 and mounting base 1130 help ensure the continuous and stable operation of the current acquisition component 1140, provide reliable current data for the battery management system 1180, and help to accurately control the charging and discharging process of the battery device 1100, thus extending the life of the battery device 1100.

[0097] In this embodiment, the integrally formed current acquisition component 1140 and mounting base 1130 can improve the stability of the overall structure, which is beneficial to reduce the change in contact resistance and improve the reliability of current acquisition.

[0098] In some embodiments, the current acquisition component 1140 and the mounting base 1130 are injection molded as an integral structure.

[0099] Specifically, injection molding refers to placing the current acquisition component 1140 into a mold cavity with the shape of a mounting base 1130, then injecting the molten raw material used to prepare the mounting base 1130 into the mold cavity containing the current acquisition component 1140. After cooling and solidification, the mounting base 1130 wraps around or supports the current acquisition component 1140 to form an integrated structure.

[0100] In one embodiment, the mounting base 1130 may be made of plastic. Plastic has good flowability and can fill the various fine structures of the mold, which is beneficial for a tight fit between the mounting base 1130 and the current acquisition component 1140. The plastic mounting base 1130 can also reduce weight and improve insulation.

[0101] In this embodiment, the use of injection molding as a single unit can improve the stability of the connection between the current acquisition component 1140 and the mounting base 1130, and is also beneficial to improving the positional accuracy and fitting accuracy between the current acquisition component 1140 and the mounting base 1130.

[0102] Reference Figure 5 and Figure 7 As shown, in some embodiments, the current acquisition component 1140 is detachably connected to the mounting base 1130.

[0103] Specifically, detachable connection means that the current acquisition component 1140 can be detached from and installed on the mounting base 1130 at any time. For example, the current acquisition component 1140 and the mounting base 1130 can be connected by a locking structure, which can be a bolt assembly, a snap-fit ​​structure, an elastic limiting structure, or a plug-in limiting structure. Alternatively, the current acquisition component 1140 and the mounting base 1130 can be connected by adhesive bonding.

[0104] The detachable connection facilitates the maintenance and repair of the current acquisition component 1140. When the current acquisition component 1140 malfunctions, maintenance personnel can quickly remove it from the mounting base 1130 for replacement or repair, shortening the downtime of the electrical equipment and improving its availability.

[0105] For example, in the backup power battery unit 1100 of the data center, the detachable design allows for the quick replacement of the faulty current acquisition component 1140 without affecting the operation of the entire battery system, ensuring continuous power supply to the data center.

[0106] In this embodiment, the use of a detachable connection method is beneficial to improving the convenience of replacing and repairing the current acquisition component 1140, and improving the efficiency of maintenance and repair work.

[0107] Reference Figure 5 and Figure 7 As shown, in some embodiments, the battery device 1100 includes a housing assembly 1110 having a receiving cavity 1113, in which a battery cell assembly 1120 is housed; and a mounting base 1130 is mounted on the housing assembly 1110.

[0108] For the housing assembly 1110, the housing assembly 1110 is used to provide a receiving cavity 1113 for the battery cell assembly 1120, which is housed within the receiving cavity 1113 of the housing assembly 1110. The housing assembly 1110 can adopt various structures. For example, the housing assembly 1110 may include a first portion 1111 and a second portion 1112, which overlap each other, and the first portion 1111 and the second portion 1112 together define the receiving cavity 1113 for accommodating the battery cell assembly 1120. The second part 1112 can be a hollow structure with one end open, and the first part 1111 can be a plate-like structure. The first part 1111 covers the open side of the second part 1112 so that the first part 1111 and the second part 1112 together define the receiving cavity 1113. Alternatively, the first part 1111 and the second part 1112 can both be hollow structures with one side open, and the open side of the first part 1111 covers the open side of the second part 1112. Of course, the box assembly 1110 formed by the first part 1111 and the second part 1112 can be of various shapes, such as a cylinder, a cuboid, etc.

[0109] Mounting base 1130 is connected to housing assembly 1110, so that housing assembly 1110 supports mounting base 1130, thereby improving the stability of mounting base 1130 and current acquisition component 1140 on it.

[0110] In this embodiment, the mounting base 1130 can be connected to the housing assembly 1110, preferably with the shortest distance from the first electrode terminal 1122, to shorten the length of the conductive sheet 1150 as much as possible, thereby reducing the resistance and improving the current acquisition accuracy.

[0111] In some embodiments, the mounting base 1130 is integrally formed on the housing assembly 1110.

[0112] Specifically, "the mounting base 1130 is integrally formed on the housing assembly 1110" means that the mounting base 1130 and the housing assembly 1110 are integrally formed structures. For example, during the manufacturing process of the housing assembly 1110, the mounting base 1130 is formed on the housing assembly 1110. For example, the mounting base 1130 and the housing assembly 1110 are formed into an integral structure by injection molding.

[0113] In this embodiment, the use of injection molding as a single unit can improve the stability of the connection between the mounting base 1130 and the housing assembly 1110, and is also beneficial to improving the positional accuracy and fitting accuracy between the housing assembly 1110 and the mounting base 1130.

[0114] Reference Figure 5 and Figure 9As shown, in some embodiments, the battery device 1100 further includes a locking assembly 1160, the mounting base 1130 includes a base body 1131 and an ear socket 1132 connected to the base body 1131, the current acquisition component 1140 is connected to the base body 1131, and the locking assembly 1160 is connected between the ear socket 1132 and the housing assembly 1110.

[0115] Specifically, the mounting base 1130 and the housing assembly 1110 can be detachably connected, thereby improving the ease of installation and removal between the mounting base 1130 and the housing assembly 1110. For example, by providing a locking assembly 1160, which connects the mounting base 1130 and the housing assembly 1110, the locking assembly 1160 can be a bolt assembly, a plug-in structure, a snap-fit ​​structure, an elastic limiting structure, etc.

[0116] Regarding the structure of the mounting base 1130, it includes a base body 1131 and an ear seat 1132. The ear seat 1132 is connected to the base column. The base body 1131 is mainly used to support the current acquisition component 1140, and the ear seat 1132 is mainly used to connect with the locking assembly 1160 to achieve phase limiting with the enclosure assembly 1110. By setting the ear seat 1132, the locking assembly 1160 can avoid the current acquisition component 1140, which helps to reduce interference and makes the layout more reasonable.

[0117] In this embodiment, the locking assembly 1160 connects the mounting base 1130 and the housing assembly 1110 via the ear seat 1132, which enhances the stability of the connection of the mounting base 1130 and facilitates the installation and disassembly of the mounting base 1130 and the housing assembly 1110.

[0118] Reference Figure 5 or Figure 8 As shown, in some embodiments, the box assembly 1110 includes a box frame 1114 and a box beam 1115. The box beam 1115 is disposed in the receiving cavity 1113 and connected to the box frame 1114. The mounting base 1130 is connected to the box frame 1114 or the box beam 1115.

[0119] Specifically, the box frame 1114 can be a ring-shaped frame structure, forming the circumferential sidewalls of the box. For example, if the exterior of the box assembly 1110 is rectangular, then the box frame 1114 includes a rectangular frame structure. The box frame 1114 includes four opposing sidewalls, and the mounting base 1130 can be connected to any one of the four sidewalls. The box frame 1114 can be considered as the second part 1112 in the above embodiment.

[0120] The box girder 1115 should be understood as a beam structure housed within the accommodating cavity. For example, the beam structure can be a crossbeam, longitudinal beam, or end beam. In the case of using an end beam, the end beam can be understood as the module end plate structure when a battery module is formed. It can be seen that the mounting base 1130 can be connected to the module end plate structure, thereby further reducing the distance between the mounting base 1130 and the first battery cell 11211, which is beneficial to reducing the length of the conductive sheet 1150.

[0121] In this embodiment, the mounting base 1130 can be connected to the box frame 1114 or the box beam 1115, so as to minimize the distance from the first electrode terminal 1122, thereby shortening the length of the conductive sheet 1150 as much as possible, thereby reducing the resistance and improving the current acquisition accuracy.

[0122] In some embodiments, the conductive sheet 1150 is positioned and connected to the mounting base 1130.

[0123] Specifically, the conductive sheet 1150 can be directly electrically connected between the connecting part 1142 and the first electrode terminal 1122. However, in order to improve the stability of the conductive sheet 1150 itself, the conductive sheet 1150 can be supported by an external structure. For example, the conductive sheet 1150 can be connected to the mounting base 1130 so that the mounting base 1130 can support or accommodate the conductive sheet 1150.

[0124] There are many ways to limit the connection between the conductive sheet 1150 and the mounting base 1130. For example, the conductive sheet 1150 and the mounting base 1130 can be detachably connected, such as by using bolt assembly, snap-fit ​​structure, elastic limiting structure and plug-in limiting structure. The conductive sheet 1150 can also be connected to the mounting base 1130 by bonding, welding and other methods.

[0125] The conductive sheet 1150 is fixedly connected to the mounting base 1130, effectively securing its position. This reduces the risk of displacement during the operation of the battery device 1100, thus ensuring the stability of the current transmission path. For example, in aerospace battery devices 1100, the stability requirements for each component are extremely high. The fixed connection of the conductive sheet 1150 ensures that the current transmission and acquisition of the battery device 1100 are unaffected under complex flight environments, guaranteeing the normal operation of the equipment.

[0126] In this embodiment, the mounting base 1130 can limit the conductive sheet 1150, thereby improving the stability of the conductive sheet 1150 and ensuring stable current transmission.

[0127] Reference Figure 3As shown, in some embodiments, the battery device 1100 further includes a power distribution box 1170, through which the first electrode terminal 1122 is electrically connected to the battery management system 1180.

[0128] Specifically, the distribution box 1170, also known as a high-voltage box or high-voltage distribution device (also called a BDU, Battery Distribution Unit), is a key component in the power system. In the battery device 1100, the distribution box 1170 is electrically connected to the battery cell assembly 1120 through the output terminal busbar component. The distribution box 1170 is then electrically connected to the battery management system 1180, thereby distributing the electrical energy in the battery cell assembly 1120 to various high-voltage systems of external electrical devices. The high-voltage distribution device can control the charging and discharging circuit of the battery device 1100 to operate smoothly. The battery management system 1180 is mainly responsible for intelligent management and maintenance of the battery system, monitoring the battery status, and ensuring the safe operation of the battery. The power from the battery cell assembly 1120 is transmitted to the high-voltage power distribution device, and then to the electrical equipment. The voltage and temperature parameters of the battery cell assembly 1120 are collected and monitored by the battery management system 1180. The battery management system 1180 controls the on / off state of the circuit in the high-voltage power distribution device, thereby controlling the power transmission from the battery cell assembly 1120 to the electrical equipment. The distribution box 1170 can also be integrated with the battery management system 1180 (BMS). The BMS optimizes the battery charging and discharging process by collecting voltage data, extending battery life and improving the overall system efficiency.

[0129] In the battery device 1100, the high-voltage power distribution device mainly controls the smooth operation of the charging and discharging circuit of the battery device 1100. It is responsible for controlling the power-on and power-off process, pre-charging process, and charging process of the high-voltage electrical circuit. The high-voltage power distribution device includes various battery devices 1100, electrical connection components for circuit connection, sampling components for collecting circuit signals, and connectors for transmitting electrical signals. For example, the battery device 1100 includes (high-voltage) battery device 1100, pre-charge battery device 1100, etc.; electrical connection components include copper busbars, aluminum busbars, wire harnesses 1400, etc.; sampling components include low-voltage sampling lines, sampling terminals, etc.; connectors include low-voltage connectors, high-voltage connectors, etc.

[0130] As can be seen, the current acquisition component 1140 is disposed outside the power distribution box 1170. The current acquisition component 1140 does not need to be connected to the power distribution box 1170. Instead, the current acquisition component 1140 is directly connected to the battery management system 1180. The current acquisition component 1140 is supported by the mounting base 1130. The current acquisition component 1140 can be connected to the first electrode terminal 1122 without the need for an adapter, thereby saving the transmission path and reducing the transmission resistance between the battery cell assembly 1120 and the battery management system 1180.

[0131] In this embodiment, the power distribution box 1170 can safely manage and transmit high voltage, and the current acquisition component 1140 is configured independently of the power distribution box 1170. This helps to save the current transmission path between the battery cell assembly 1120 and the current acquisition component 1140, thereby reducing the resistance between the two and improving the accuracy of current acquisition.

[0132] In one specific implementation, refer to Figure 2-10 As shown, the battery device 1100 includes a battery cell assembly 1120 and a current acquisition component 1140. The battery cell assembly 1120 includes multiple battery cells 1121 connected in series and / or in parallel to form a circuit. Among the multiple battery cells 1121, there is a first battery cell 11211. The first battery cell 11211 includes a first electrode terminal 1122, which is the positive or negative output terminal of the circuit formed by the series and / or parallel connections. The current acquisition component 1140 includes a acquisition part 1141 and a connection part 1142. The acquisition part 1141 is used to acquire the current signal flowing through the connection part 1142. The current acquisition component 1140 is disposed adjacent to the first battery cell 11211, and the connection part 1142 is connected to the first electrode terminal. 1122 Electrical connection; the battery device 1100 also includes a conductive sheet 1150, one end of which is connected to the first electrode terminal 1122, and the other end of which is connected to the connecting part 1142; multiple battery cells 1121 are arranged along the first direction X, and the connecting part 1142 is correspondingly provided with the first electrode terminal 1122 along the first direction X; the connecting surface of the connecting part 1142 is flush with the connecting surface of the first electrode terminal 1122, and the conductive sheet 1150 extends along the first direction X; the conductive sheet 1150 and the connecting part 1142 are welded or locked together; the battery device 1100 also includes a mounting base 1130, and the current acquisition component 1140 is connected to the mounting base 1130; the current acquisition component 1140 and the mounting base 1130 are integrally formed.

[0133] According to some embodiments of this application, this application also provides an energy storage device, which includes a plurality of battery devices 1100 as described in the above embodiments, the battery devices 1100 being used to store or provide electrical energy.

[0134] Specifically, an energy storage device may include one or more battery clusters to increase the voltage and capacity of the energy storage device. A battery cluster may include multiple individual battery cells 1120 or multiple battery devices 1100, which are connected in series via a busbar 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.

[0135] Energy storage devices can be used in energy storage power stations, wind power generation systems, solar power generation systems, mobile power systems, or temporary power supply systems. Energy storage devices can store electrical energy as needed and output it when appropriate. For example, an energy storage device can store electrical energy during off-peak hours and provide power to relevant users or electrical equipment during peak hours. The energy storage system provided in this application embodiment can be any power system that requires energy storage devices.

[0136] In some embodiments, the energy storage device is an energy storage container or an energy storage cabinet.

[0137] In some embodiments, the energy storage device may include a cabinet and one or more battery clusters housed within the cabinet.

[0138] In some embodiments, the energy storage device may include modules such as a thermal management module, a main control module, a central control module, a power distribution module, and a fire protection module.

[0139] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 1100 via piping to regulate the temperature of the battery cell assembly 1120.

[0140] As an example, the main control module can serve as the battery management unit for the battery cluster, used 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 instance, it can control the charging and discharging current and voltage of the battery cluster. The main control module includes modules such as an auxiliary battery management unit (SBMU) and a fusion switch.

[0141] As an example, the central control module can serve as the battery management unit for an energy storage device, used to monitor and manage the device. The central control module can monitor information such as the energy storage device's current, voltage, power, state of charge, or temperature. For instance, it can control the charging and discharging current and voltage of the energy storage device. As an example, the central control module includes modules such as an Insulation Monitoring Module (IMM), a Master Battery Management Unit (MBMU), an Ethernet (ETH) module, and a fiber optic conversion module.

[0142] As an example, the fire protection module includes a control panel, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in the energy storage system.

[0143] As an example, a power distribution module can be used to distribute power to modules in an energy storage device that require electricity.

[0144] According to some embodiments of this application, this application also provides an energy storage system, which includes a power conversion device and the energy storage device in the above embodiments. The power conversion device is used to electrically connect the power generation device and the energy storage device.

[0145] In some embodiments, the energy storage system may include one or more energy storage devices and a power conversion system (PCS), wherein the power conversion system is used to connect the power generation device and the energy storage device. The power generation device generates electrical energy, which can be stored in the energy storage device through the power conversion system. As examples, the power generation device may specifically be a solar panel, hydroelectric power generation device, thermal power generation device, wind power generation device, etc. The specific type of power generation device is not limited in this application.

[0146] According to some embodiments of this application, refer to Figure 1 As shown, this application also provides an electrical device, which includes the battery device 1100, the energy storage device, or the energy storage system described in the above embodiments. The battery device 1100 is used to store or provide electrical energy. The electrical device can be, but is not limited to, mobile phones, portable devices, laptops, electric toys, power tools, electric vehicles, vehicles 1000, ships, spacecraft, etc. Among them, electric toys can include stationary or mobile electric toys, such as game consoles, electric car toys, electric boat toys, and electric airplane toys, etc., and spacecraft can include airplanes, rockets, space shuttles, and spacecraft, etc.

[0147] For ease of explanation, the following embodiments will be described using a vehicle 1000 as an example of an electrical device according to an embodiment of this application.

[0148] Please refer to Figure 1 As shown, Figure 1 This is a schematic diagram of the structure of a vehicle 1000 provided in some embodiments of this application. The vehicle 1000 can be a gasoline-powered vehicle, a natural gas-powered vehicle, or a new energy vehicle. New energy vehicles can be pure electric vehicles, hybrid electric vehicles, or range-extended electric vehicles, etc. A battery device 1100 is provided inside the vehicle 1000, and the battery device 1100 can be located at the bottom, front, or rear of the vehicle 1000. The battery device 1100 can be used to power the vehicle 1000; for example, the battery device 1100 can serve as the operating power source for the vehicle 1000. The vehicle 1000 may also include a controller 1200 and a motor 1300. The controller 1200 is used to control the battery device 1100 to supply power to the motor 1300, for example, to meet the power needs of the vehicle 1000 during starting, navigation, and driving.

[0149] In some embodiments of this application, the battery device 1100 can not only serve as the operating power source for the vehicle 1000, but also as the driving power source for the vehicle 1000, replacing or partially replacing fuel or natural gas to provide driving power for the vehicle 1000.

[0150] The technical solutions described in the embodiments of this application are applicable to various electrical devices that use battery devices 1100, such as mobile phones, portable devices, laptops, electric vehicles, electric toys, power tools, vehicles 1000, ships and spacecraft, etc. For example, spacecraft include airplanes, rockets, space shuttles and spacecraft.

[0151] The examples of electrical devices in this application are based on the examples of the battery device 1100 described above. The examples of electrical devices include all the technical effects of the examples of the battery device 1100 described above, and will not be repeated here.

[0152] According to some embodiments of this application, this application also provides a charging network, which includes charging piles and energy storage devices or energy storage systems as described in the above embodiments, wherein the energy storage devices are used to provide electrical energy to the charging piles.

[0153] For example, the charging network includes charging stations and energy storage devices. The charging stations are electrically connected to the energy storage devices, which provide power to the charging stations. The charging stations are also electrically connected to a battery unit 1100 in the energy storage devices via cables. The battery unit 1100 can provide its stored electrical energy to the charging stations. The charging stations have one or more connectors for connecting to electrical devices (such as vehicle 1000) to replenish their power.

[0154] Energy storage devices can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0155] The above are merely preferred embodiments of this application, and only specifically describe the technical principles of this application. These descriptions are only for explaining the principles of this application and should not be construed as limiting the scope of protection of this application in any way. Based on this explanation, any modifications, equivalent substitutions, and improvements made within the spirit and principles of this application, as well as other specific embodiments of this application that can be conceived by those skilled in the art without creative effort, should be included within the scope of protection of this application.

Claims

1. A battery device (1100) characterized by, include: A battery cell assembly (1120) includes a plurality of battery cells (1121), which are connected in series and / or in parallel to form a circuit. Among the plurality of battery cells (1121), there is a first battery cell (11211), which includes a first electrode terminal (1122). The first electrode terminal (1122) is the positive or negative output terminal of the circuit formed by the series and / or parallel connections. The current acquisition component (1140) includes an acquisition part (1141) and a connection part (1142). The acquisition part (1141) is used to acquire the current signal flowing through the connection part (1142). The current acquisition component (1140) is disposed adjacent to the first battery cell (11211), and the connection part (1142) is electrically connected to the first electrode terminal (1122).

2. The battery device (1100) of claim 1, wherein, The battery device (1100) further includes a conductive sheet (1150), one end of which is connected to the first electrode terminal (1122), and the other end of which is connected to the connecting part (1142).

3. The battery device (1100) of claim 2, wherein, Multiple battery cells (1121) are arranged along a first direction (X), and along the first direction (X), the connecting portion (1142) is provided corresponding to the first electrode terminal (1122).

4. The battery device (1100) of claim 3, wherein, The connecting surface of the connecting part (1142) is flush with the connecting surface of the first electrode terminal (1122), and the conductive sheet (1150) extends along the first direction (X).

5. The battery apparatus (1100) of claim 2, wherein, The conductive sheet (1150) and the connecting part (1142) are welded or locked together.

6. The battery device (1100) according to any one of claims 1-5, characterized by The battery device (1100) also includes a mounting base (1130), and the current acquisition component (1140) is connected to the mounting base (1130).

7. The battery device (1100) of claim 6, wherein, The current acquisition component (1140) and the mounting base (1130) are integrally formed.

8. The battery device (1100) of claim 6, wherein, The battery device (1100) includes a housing assembly (1110) having a receiving cavity (1113), in which the battery cell assembly (1120) is housed; and a mounting base (1130) is mounted on the housing assembly (1110).

9. The battery device (1100) of claim 8, wherein, The box assembly (1110) includes a box frame (1114) and a box beam (1115), the box beam (1115) is disposed in the receiving cavity (1113) and connected to the box frame (1114), and the mounting base (1130) is connected to the box frame (1114) or the box beam (1115).

10. An electrical device comprising a battery device (1100) as described in any one of claims 1-9, the battery device (1100) being used to store or provide electrical energy.

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