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

Abstract

The application discloses a battery device, an energy storage device, an energy storage system and a charging network. The battery device comprises a battery monomer assembly and a connecting assembly. The battery monomer assembly comprises a plurality of battery monomers arranged along a first direction. The connecting assembly is arranged towards a first wall of the plurality of battery monomers provided with electrode terminals. The connecting assembly comprises a wire harness and a plurality of busbar components arranged along the first direction. The connecting assembly comprises a plurality of data acquisition areas arranged along the first direction. The wire harness comprises a plurality of data lines corresponding to the plurality of data acquisition areas one by one arranged along a second direction. Sampling ends of the plurality of data lines arranged along the second direction are connected to the plurality of data acquisition areas arranged along the first direction in sequence, so that each data line is used to acquire state information of the corresponding busbar component of the corresponding data acquisition area. The battery device, the energy storage device, the energy storage system and the charging network can improve the processing efficiency of the battery device.

Description

Technical Field

[0001] This application relates to the field of batteries, and more specifically, to a battery device, an energy storage device, an energy storage system, and a charging network. Background Technology

[0002] With the continuous advancement of battery technology, various new energy industries that use battery devices as energy storage equipment have developed rapidly. In the development of battery technology, in addition to improving the performance of battery devices, how to improve the processing efficiency of battery devices is also an urgent problem to be solved. Summary of the Invention

[0003] This application provides a battery device, an energy storage device, an energy storage system, and a charging network, which can improve the processing efficiency of the battery device.

[0004] In a first aspect, a battery device is provided, comprising: a battery cell assembly including a plurality of battery cells arranged along a first direction, each battery cell having an electrode terminal disposed on a first wall; a connection assembly disposed toward the first wall of the plurality of battery cells, the connection assembly including a wiring harness and a plurality of busbars arranged along the first direction, the plurality of busbars being used to electrically connect the electrode terminals of the plurality of battery cells, the connection assembly including a plurality of data acquisition areas arranged along the first direction, the wiring harness including a plurality of data lines arranged along a second direction; the plurality of data lines corresponding one-to-one with the plurality of data acquisition areas, and the sampling ends of the plurality of data lines arranged sequentially along the second direction being respectively connected to the plurality of data acquisition areas arranged sequentially along the first direction, such that each data line is used to acquire state information of a corresponding busbar of the corresponding data acquisition area, the state information including the voltage and / or temperature of the busbar.

[0005] Therefore, in the battery device of this application embodiment, the data lines arranged in sequence correspond to the data acquisition areas arranged in sequence. The position of the data acquisition area to which the data lines are connected can be determined according to the arrangement order of the data lines, without the need to distinguish them based on other conditions such as the color of the data lines. This makes the wire harness neater, facilitates the connection and installation of the wire harness, and thus improves the assembly efficiency of the battery device.

[0006] In some embodiments, the connection assembly includes multiple rows of busbars arranged along the second direction and multiple wire harnesses arranged along the second direction, with each row of busbars corresponding to one of the multiple wire harnesses. Each row of busbars includes multiple busbars arranged along the first direction. By increasing the number of wire harnesses, the connection complexity of each wire harness is simplified, thereby reducing the complexity of the connection assembly and improving processing efficiency.

[0007] In some embodiments, the connection assembly includes two wire harnesses, the first wall is provided with a pressure relief mechanism, and the connection assembly is provided with a through hole corresponding to the pressure relief mechanism. The through hole is located between the two wire harnesses to reduce the obstruction of the two wire harnesses to the emissions discharged by the pressure relief mechanism, and also to reduce the impact of the high-temperature emissions on the wire harnesses, thereby improving the reliability of the battery device.

[0008] The through hole corresponds to the pressure relief mechanism of multiple battery cells, reducing the number of through holes provided on the connecting assembly to facilitate processing.

[0009] The connecting assembly has multiple through holes arranged along the first direction, each through hole corresponding to a pressure relief mechanism of a single battery cell. This reduces the area occupied by all the through holes in the connecting assembly, improving its structural strength and stability and lowering the risk of localized damage.

[0010] In some embodiments, the connection assembly further includes a first connector, wherein the connection ends of the plurality of data cables correspond one-to-one with a plurality of holes of the first connector, and the connection ends of the plurality of data cables are sequentially connected to the plurality of holes of the first connector. By using the first connector, information collected by the sampling ends of the data cables can be transmitted to other components connected to the first connection area to output information. Furthermore, by sequentially connecting the plurality of data cables arranged in a second direction to the plurality of holes of the first connector, the positions of the data cables and the data acquisition areas connected to the data cables can be determined according to the positions of the holes, which facilitates the connection and installation of the first connector and the wiring harness, and also improves the assembly efficiency of the battery device.

[0011] In some embodiments, the first connector includes two rows of holes, and the plurality of data lines include two sets of data lines arranged along the second direction, with each set of data lines sequentially connected to a corresponding row of holes. Since the plurality of holes and data lines of the first connector are arranged sequentially, and the plurality of data lines and data acquisition areas are arranged sequentially, the correspondence between the plurality of holes and data acquisition areas of the first connector is clear, eliminating the need for misaligned connections and differentiation based on factors such as the color of the data lines. This facilitates connection, reduces connection errors, improves the connection efficiency of the connector assembly, and consequently enhances the processing and assembly efficiency of the battery device.

[0012] In some embodiments, the connection component includes a plurality of wire harnesses and a plurality of first connectors that correspond one-to-one, so that each first connector outputs the status information of a series of busbar components collected by the corresponding wire harness. The structure is simple and easy to process and assemble.

[0013] In some embodiments, the battery device further includes a battery management unit, which includes a second connector for connecting to the first connector and receiving the status information collected through the wiring harness. The battery management unit is used to determine the status of the battery cell assembly based on the status information, so that the battery management unit can promptly handle any abnormalities in the status of the battery cells in the battery cell assembly, thereby improving the reliability of the battery device.

[0014] In some embodiments, the battery management unit includes a plurality of the second connectors, and the connection component includes a plurality of the first connectors. The plurality of the second connectors and the plurality of the first connectors correspond one-to-one, so that the battery management unit receives data sent by the first connectors connected to it through the plurality of second connectors.

[0015] In some embodiments, the connection assembly further includes a fixing membrane, with the plurality of busbars and the wiring harness located on the side of the fixing membrane away from the battery cell, facilitating the fixing of the positions of the plurality of busbars and the wiring harness.

[0016] In some embodiments, multiple busbar components and the wiring harness are fixed to the fixing film by thermo-pressing, a method that is easy to implement and provides structural stability.

[0017] In some embodiments, the busbar component is provided with at least one data acquisition area, which includes a voltage acquisition area and / or a temperature acquisition area. Thus, by connecting the sampling end of the data line to the voltage acquisition area and / or temperature acquisition area, the voltage and / or temperature of the busbar component can be measured, thereby determining whether the voltage and / or temperature of the battery cell connected to the busbar component is abnormal. This allows for timely handling of abnormal battery cell voltage and / or temperature, improving the reliability of the battery device.

[0018] In a second aspect, an energy storage device is provided, comprising: a plurality of battery devices as described in the first aspect or any one of the embodiments of the first aspect, the battery device being used to store or provide electrical energy.

[0019] Thirdly, an energy storage system is provided, comprising: a power conversion device; and the energy storage device described in the second aspect, wherein the power conversion device is used to electrically connect a power generation device and the energy storage device.

[0020] Fourthly, a charging network is provided, comprising: a charging pile; an energy storage device as described in the second aspect or an energy storage system as described in the third aspect, the energy storage device being used to provide electrical energy to the charging pile. Attached Figure Description

[0021] Figure 1 This is an exploded view of a battery device according to an embodiment of this application;

[0022] Figure 2 This is a schematic diagram of a partial structure of a battery device according to an embodiment of this application;

[0023] Figure 3 This is a top view of a connection component according to an embodiment of this application;

[0024] Figure 4 This is a top view schematic diagram of a partial structure of a connection component according to an embodiment of this application;

[0025] Figure 5 This is a schematic diagram of the structure of a first connector according to an embodiment of this application;

[0026] Figure 6 This is a schematic diagram of the structure of a battery cell according to an embodiment of this application;

[0027] Figure 7 This is a structural block diagram of an energy storage system according to an embodiment of this application;

[0028] Figure 8 This is a structural block diagram of a charging network according to an embodiment of this application.

[0029] The accompanying drawings are not drawn to scale. Detailed Implementation

[0030] The technical solutions in the embodiments of this application will now be described with reference to the accompanying drawings.

[0031] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0032] Unless otherwise defined, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used in the description of this application 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 description, claims, and accompanying drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the description, claims, or accompanying drawings of this application are used to distinguish different objects, not to describe a specific order or hierarchy.

[0033] In this application, the reference to "embodiment" means that a specific 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 mutually exclusive, independent, or alternative embodiment. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described in this application can be combined with other embodiments.

[0034] In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "attachment" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0035] 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, or B existing alone. Additionally, in this application, the character " / " generally indicates that the preceding and following related objects have an "or" relationship.

[0036] In the embodiments of this application, the same reference numerals denote the same components, and for the sake of brevity, detailed descriptions of the same components are omitted in different embodiments. It should be understood that the thickness, length, width, and other dimensions of various components in the embodiments of this application shown in the accompanying drawings, as well as the overall thickness, length, width, and other dimensions of the integrated device, are merely illustrative and should not constitute any limitation on this application.

[0037] In this application, "multiple" refers to two or more (including two), and similarly, "multiple groups" refers to two or more (including two), and "multiple pieces" refers to two or more (including two).

[0038] In the development of battery technology, to improve the energy density of battery devices, a large number of individual battery cells are typically incorporated. To monitor and manage the state of these cells, sampling harnesses are usually installed within the battery device to collect state information such as voltage and / or temperature from each cell. With a large number of battery cells, the harness connections become more complex, increasing the difficulty of manufacturing and assembly, and consequently affecting the manufacturing efficiency of the battery device.

[0039] Therefore, embodiments of this application provide a battery device, an energy storage device, an energy storage system, and a charging network that can solve the above-mentioned problems. The battery device of this application includes a battery cell assembly and a connection assembly. The battery cell assembly includes a plurality of battery cells arranged along a first direction, and each battery cell has an electrode terminal disposed on its first wall. The connection assembly is disposed facing the first wall of the plurality of battery cells, and includes a wiring harness and a plurality of busbars arranged along the first direction, wherein the plurality of busbars are used to electrically connect the electrode terminals of the plurality of battery cells. The connection assembly includes a plurality of data acquisition areas arranged along the first direction, and the wiring harness includes a plurality of data lines arranged along a second direction, with each data line corresponding to one of the plurality of data acquisition areas. The plurality of data lines arranged sequentially along the second direction are respectively connected to the plurality of data acquisition areas arranged sequentially along the first direction, so that each data line is used to acquire the status information of the busbar corresponding to the corresponding data acquisition area. This status information includes voltage and / or temperature, thereby monitoring and managing the voltage and / or temperature of the battery cells electrically connected to the busbar. The sequentially arranged data lines correspond to sequentially arranged data acquisition areas. The location of the data acquisition area to which the data lines are connected can be determined according to the arrangement of the data lines, without the need to distinguish them based on other conditions such as the color of the data lines. This makes the wiring harness neater, facilitates the connection and installation of the wiring harness, and thus improves the assembly efficiency of the battery device.

[0040] Figure 1 An exploded view of the battery device 10 according to an embodiment of this application is shown. Figure 1 As shown, the battery device 10 of this embodiment includes a housing 11, which can be used to accommodate at least one battery cell 20. The housing 11 of this embodiment has a hollow internal structure, and at least one battery cell 20 is accommodated within the housing 11. Specifically, the housing 11 includes a first housing portion 111 and a second housing portion 112, which are sealed together. For example, the first housing portion 111 and the second housing portion 112 can be snapped together to form a hollow structure. The shape of the first housing portion 111 and the second housing portion 112 can be determined according to the shape of the components accommodated internally, for example, it can be determined according to the shape of a combination of multiple battery cells 20 accommodated internally.

[0041] In the embodiments of this application, at least one of the first housing portion 111 and the second housing portion 112 has an opening. For example, as Figure 1 As shown, the first box portion 111 and the second box portion 112 can both be hollow cuboids with one face as an opening. The openings of the first box portion 111 and the second box portion 112 are arranged opposite to each other, and the first box portion 111 and the second box portion 112 are interlocked to form a box 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0042] For example, unlike Figure 1 As shown, only one of the first housing portion 111 and the second housing portion 112 may be a hollow cuboid with an opening, while the other may be plate-shaped to cover the opening. Taking the first housing portion 111 as a hollow cuboid with one opening and the second housing portion 112 as a plate-shaped example, the second housing portion 112 is used to cover the opening of the first housing portion 111 to form a housing 11 with a closed chamber, which can be used to accommodate at least one battery cell 20.

[0043] like Figure 1 As shown, for ease of explanation, this application embodiment defines three directions: the length direction X of the battery device 10, the width direction Y of the battery device 10, and the height direction Z of the battery device 10. The length direction X, the width direction Y, and the height direction Z are perpendicular to each other, and the size of the battery device 10 in the length direction X is greater than the size in the width direction Y.

[0044] Figure 2 A partial structural schematic diagram of the battery device 10 according to an embodiment of this application is shown, for example, Figure 2 It can be Figure 1 A partial structural schematic diagram of the battery device 10 shown; Figure 3 A top view schematic diagram of the connection component 12 of the battery device 10 according to an embodiment of this application is shown; Figure 4 A top view schematic diagram of a partial structure of the connection component 12 according to an embodiment of this application is shown, for example, Figure 4 for Figure 3 A magnified view of region A in the middle.

[0045] like Figures 2 to 4 As shown, the battery cell assembly 200 includes a plurality of battery cells 20 arranged along a first direction. Each battery cell 20 has an electrode terminal 202 disposed on its first wall 201. A connection assembly 12 is disposed toward the first wall 201 of the plurality of battery cells 20. The connection assembly 12 includes a wiring harness 123 and a plurality of busbars 122 arranged along the first direction. The multiple busbars 122 are used to electrically connect the electrode terminals 202 of the plurality of battery cells 20. The connection assembly 12 includes a plurality of data acquisition areas 125 arranged along the first direction. The wiring harness 123 includes a plurality of data lines 1231 arranged along a second direction. The plurality of data lines 1231 correspond one-to-one with the plurality of data acquisition areas 125. The sampling ends of the plurality of data lines 1231 arranged sequentially along the second direction are respectively connected to the plurality of data acquisition areas 125 arranged sequentially along the first direction, so that each data line 1231 is used to collect the status information of the corresponding busbar 122 of the corresponding data acquisition area 125. The status information includes the voltage and / or temperature of the busbar 122.

[0046] The battery device 10 mentioned in the embodiments of this application may include one or more battery cell assemblies 200 for providing voltage and capacity. For example, the battery device 10 may include a plurality of battery cell assemblies 200 arranged along its width direction Y. Each battery cell assembly 200 in the embodiments of this application may include a plurality of battery cells 20 arranged along a first direction, wherein the plurality of battery cells 20 may be connected in series, parallel, or mixed. For example, the first direction may be the length direction of the battery device 10, then the battery device 10 may include a plurality of battery cells 20 arranged along its length direction X.

[0047] In some embodiments, the battery cell assembly 200 of this application can be a battery module, which is formed by arranging and fixing multiple battery cells 20 to form an independent module. As an example, the battery module can be formed by binding multiple battery cells 20 together with one or more cable ties 14.

[0048] In some embodiments, the battery device 10 may further include a first end plate 151 and a second end plate 152, which are disposed at both ends of a plurality of battery cells 20 of the battery cell assembly 200 along a first direction to clamp the plurality of battery cells 20, thereby further improving the structural stability of the battery cell assembly 200.

[0049] In some embodiments, the battery device 10 may further include a fixing member 13, which extends along a first direction and has its two ends connected to a first end plate 151 and a second end plate 152, respectively. The fixing member 13 is used to further fix the plurality of battery cells 20 of the battery cell assembly 200, reduce the displacement between the plurality of battery cells 20, and improve the structural stability of the battery cell assembly 200.

[0050] In some embodiments, the fastener 13 may be disposed on the side of the connecting assembly 12 away from the battery cell 20, but the embodiments of this application are not limited thereto. Compared to disposing the fastener 13 between the connecting assembly 12 and the battery cell assembly 200, the connecting assembly 12 does not need to have an area to avoid the fastener 13, reducing the processing and installation difficulty of the connecting assembly 12. Furthermore, in the event that the fastener 13 deforms due to the expansion of multiple battery cells 20 within the battery cell assembly 200, the impact of the fastener 13 on the connecting assembly 12 is relatively small, reducing the possibility of the connecting assembly 12 being damaged by the deformation and pressure of the fastener 13, thereby improving the structural stability of the connecting assembly 12.

[0051] In some embodiments, the battery device 10 may be a battery pack, which includes a housing 11 and one or more battery cell assemblies 200, the battery cell assemblies 200 being housed within the housing 11. As an example, the battery cell assembly 200 may be a battery module, which can be housed within the housing 11 by fixing the battery module to the housing 11. As an example, the battery cell assembly 200 may also be housed within the housing 11 by directly fixing multiple battery cells 20 to the housing 11.

[0052] The battery cell 20 in this application embodiment can be a cylindrical battery cell, a prismatic battery cell, a pouch battery cell, or a battery cell 20 of other shapes. Prismatic battery cells include prismatic battery cells, blade-shaped battery cells, and multi-prismatic batteries, such as hexagonal prismatic batteries. This application has no particular limitations.

[0053] It should be understood that the battery cell 20 in this embodiment of the application is provided with electrode terminals 202. The electrode terminals 202 in this embodiment of the application are used to electrically connect with the electrode assembly inside the battery cell 20 to output the electrical energy of the battery cell 20. The electrode terminals 202 can be directly connected to the tabs or indirectly connected to the tabs through current collectors. The electrode terminals 202 can be disposed on any wall of the battery cell 20.

[0054] The electrode terminals 202 in this embodiment can be located on any one or more walls of the battery cell 20. For example, this embodiment mainly takes a battery cell 20 that includes two electrode terminals 202, and the electrode terminals 202 are located on the same wall of the battery cell 20. Here, it is taken that both electrode terminals 202 are located on the first wall 201, wherein the first wall 201 can be any one of the walls of the battery cell 20, but this embodiment is not limited to this.

[0055] The connection component 12 of this embodiment can be used to electrically connect multiple battery cells 20. For example, the connection component 12 can be a thermocompressed cell connection system (CCS). The connection component 12 is disposed toward the first wall 201 of the multiple battery cells 20 to facilitate assembly. Specifically, the connection component 12 includes multiple busbars 122 arranged along a first direction, which are used to electrically connect the electrode terminals 202 of the multiple battery cells 20 to achieve the electrical connection of the multiple battery cells 20. Connecting multiple battery cells 20 through the connection component 12 has a simple structure, is easy to implement, and has a high degree of integration, saving space within the battery device 10, thereby improving the energy density of the battery device 10.

[0056] The connection component 12 in this embodiment further includes a wire harness 123, which encloses a plurality of data lines 1231 arranged along a second direction, for example, such as Figures 2 to 4 As shown in the embodiment of this application, taking the second direction as the width direction Y of the battery device 10 as an example, the wiring harness 123 includes a row of data lines 1231 arranged along the width direction Y of the battery device 10.

[0057] Furthermore, multiple data lines 1231 correspond one-to-one with multiple data acquisition areas 125, and the multiple data lines 1231 arranged sequentially along the second direction correspond to the multiple data acquisition areas 125 arranged sequentially along the first direction. For example, as... Figures 2 to 4 As shown, taking the length direction X of the battery device 10 as the first direction and the width direction Y of the battery device 10 as the second direction, multiple data acquisition areas 125 arranged sequentially along the length direction X of the battery device 10 are respectively connected to multiple data lines 1231 arranged sequentially along the width direction of the battery device 10. This allows the multiple data lines 1231 to be arranged neatly, and the position of the connected data acquisition area 125 can be determined according to the order, without needing to distinguish them based on other conditions such as the color of the data lines 1231. This makes the wire harness 123 neater, facilitates the connection and installation of the wire harness 123, and thus improves the assembly efficiency of the battery device 10.

[0058] Each data line 1231 in this embodiment is used to collect the status information of the busbar component 122 of the corresponding data acquisition area 125. For example, the status information may include the voltage and / or temperature of the busbar component 122. Then, based on the status information of the busbar component 122, the status information of the battery cell 20 connected to the busbar component 122 is determined. For example, the voltage and / or temperature of the battery cell 20 connected to the busbar component 122 is determined. Based on the status information of the battery cell 20, abnormal conditions of the battery cell 20 are detected in a timely manner and then handled in a timely manner to improve the reliability of the battery device 10.

[0059] In some embodiments, the bus component 122 is provided with at least one data acquisition area 125, the at least one data acquisition area 125 including a voltage acquisition area and / or a temperature acquisition area. For example... Figures 2 to 4 As shown, taking the connection component 12 as an example, which includes a plurality of busbar components 122 arranged along the length direction of the battery device 10, each busbar component 122 may include at least one data acquisition area 125.

[0060] For example, for any busbar 122, the data acquisition area 125 of the busbar 122 may include a voltage acquisition area. Then, the sampling end of the data line 1231 is connected to the voltage acquisition area to measure the voltage of the busbar 122. By measuring the voltage of the busbar 122, it can be determined whether the voltage of the battery cell 20 connected to the busbar 122 is abnormal, so that when the voltage of the battery cell 20 is abnormal, it can be dealt with in a timely manner to improve the reliability of the battery device 10.

[0061] In some embodiments, each busbar component 122 in the connection assembly 12 may be provided with a voltage acquisition area to measure the voltage of each busbar component 122, thereby monitoring the voltage of each battery cell 20 and improving the reliability of the battery device 10.

[0062] For example, for any one of the busbar components 122, the data acquisition area 125 of the busbar component 122 may include a temperature acquisition area. Then, the sampling end of the data line 1231 is connected to the temperature acquisition area to measure the temperature of the busbar component 122. By measuring the temperature of the busbar component 122, it can be determined whether the temperature of the battery cell 20 connected to the busbar component 122 is abnormal. In order to cool down or heat up the battery cell 20 in time when the temperature is abnormal, such as when the temperature of the battery cell 20 is too high or too low, the risk of thermal runaway of the battery cell 20 is reduced, and the performance of the battery cell 20 is improved, thereby improving the reliability and stability of the battery device 10.

[0063] In some embodiments, only a portion of the multiple busbars 122 in the connection assembly 12 are typically provided with a temperature acquisition area to save the number of data lines 1231 and simplify the structure.

[0064] In some embodiments, the sampling end of the data line 1231 may include a negative temperature coefficient thermistor (NTC) for acquiring the temperature of the bus component 122, but the embodiments of this application are not limited thereto.

[0065] In some embodiments, the connection assembly 12 includes multiple rows of busbars 122 arranged along a second direction and multiple wire harnesses 123 arranged along the second direction, with each row of busbars 122 corresponding to one of the multiple wire harnesses 123. Each row of busbars 122 includes multiple busbars 122 arranged along a first direction. Considering that multiple battery cell assemblies 200 are provided in the battery device 10, and / or that each battery cell assembly 200 includes a large number of battery cells 20, the connection assembly 12 can be configured to include multiple rows of busbars 122 arranged along the second direction. For example, as Figures 2 to 4 As shown, the connection component 12 may include two rows of busbar components 122 arranged along the width direction Y of the battery device 10.

[0066] Correspondingly, the connection component 12 may also include multiple wire harnesses 123, each corresponding one-to-one with a series of busbars 122, i.e., each wire harness 123 corresponds to one series of busbars 122, so as to collect the status information of the corresponding series of busbars 122 through the multiple data lines 1231 included in the wire harness 123. By increasing the number of wire harnesses 123, the connection complexity of each wire harness 123 is simplified, thereby reducing the complexity of the connection component 12 and improving processing efficiency. For example, as Figures 2 to 4 As shown, the connection component 12 includes two rows of busbars 122 and two wire harnesses 123. Each wire harness 123 is connected to a data acquisition area 125 to collect the status information of one row of busbars 122. Compared with using the same wire harness 123 to collect all two rows of busbars 122, using two wire harnesses 123 simplifies the complexity of each wire harness 123 and facilitates connection.

[0067] In this embodiment, the connection component 12 further includes a first connector 126. The connection ends of the plurality of data lines 1231 correspond one-to-one with the plurality of holes 1261 of the first connector 126, and the connection ends of the plurality of data lines 1231 are sequentially connected to the plurality of holes 1261 of the first connector 126. By using the first connector 126, the information collected by the sampling end of the data lines 1231 can be sent to other components connected to the first connector 126 to output information. Furthermore, the plurality of data lines 1231 arranged in the second direction are sequentially connected to the plurality of holes 1261 of the first connector 126. The positions of the data lines 1231 and the data acquisition area 125 connected to the data lines 1231 can be determined according to the positions of the holes 1261, which facilitates the connection and installation of the first connector 126 and the wiring harness 123, and also improves the assembly efficiency of the battery device 10.

[0068] In some embodiments, the connection component 12 includes a plurality of wire harnesses 123 and a plurality of first connectors 126, each corresponding to the other. For example, as... Figures 2 to 4 As shown, when the connection component 12 includes two wire harnesses 123, the connection component 12 also includes two first connectors 126, so that each first connector 126 can output the status information of a series of busbar components 122 collected by the corresponding wire harness 123. The structure is simple and easy to process and assemble.

[0069] It should be understood that in this embodiment, the connection ends of the wire harness 123 and the holes 1261 of the first connector 126 are connected sequentially in a certain order. For example, Figure 5 This illustration shows a possible schematic diagram of a plurality of holes 1261 in the first connector 126 according to an embodiment of this application, for example, Figure 5The first connector 126 shown can be any one of the first connectors 126 included in the connection assembly 12.

[0070] In some embodiments, the first connector 126 includes two rows of holes 1261, and the plurality of data lines 1231 include two sets of data lines 1231 arranged along a second direction, with each set of data lines 1231 sequentially connected to a corresponding row of holes 1261. For example, as... Figure 5 As shown in the embodiment of this application, the first connector 126 includes two rows of holes 1261 as an example. The number of holes 1261 included in the two rows of holes 1261 can be the same or different. For example, the first row includes n holes 1261 numbered from 1 to n, and the second row includes mn holes 1261 numbered from n+1 to m.

[0071] For the multiple data lines 1231 arranged along the second direction, they are divided into two groups according to the arrangement order. The two groups of data lines 1231 are still arranged in the second direction. One group of data lines 1231 are connected sequentially to the n holes 1261 from 1 to n in the first row, and the other group of data lines 1231 are connected sequentially to the mn holes 1261 from n+1 to m in the second row.

[0072] Since the multiple holes 1261 of the first connector 126 are arranged sequentially with the multiple data lines 1231, and the multiple data lines 1231 are arranged sequentially with the multiple data acquisition areas 125, the correspondence between the multiple holes 1261 of the first connector 126 and the multiple data acquisition areas 125 is clear. There is no need for misaligned connection, and therefore no need to distinguish them by conditions such as the color of the data lines 1231. This facilitates connection, reduces connection errors, improves the connection efficiency of the connection component 12, and improves the processing and assembly efficiency of the battery device 10.

[0073] In some embodiments, the number of data lines 1231 included in each wire harness 123 is less than or equal to the number of holes 1261 of the first connector 126 connected to that wire harness 123. For example, as Figure 5 As shown, the first connector 126 has m holes 1261, and the wire harness 123 connected to the first connector 126 may have m data lines 1231 or fewer than m data lines 1231, so that each data line 1231 has a corresponding hole 1261 for insertion.

[0074] In some embodiments, when the number of holes 1261 in the first connector 126 is greater than the number of data lines 1231 included in the connected wire harness 123, such as Figure 5As shown, at least one hole 1261 in the first row and / or the second row may not be connected to the data cable 1231; and the hole 1261 not connected to the data cable 1231 is usually located at the end of the first connector 126, for example, the hole 1261 not connected to the data cable 1231 is usually located at... Figure 5 The left and right ends of the first row and / or the left and right ends of the second row are arranged so that the holes 1261 connected to the data cable 1231 are continuous, reducing the risk of misalignment of the data cable 1231 and improving connection efficiency.

[0075] In this embodiment, the battery device 10 further includes a battery management unit. The battery management unit includes a second connector for connecting to the first connector 126 and receiving status information collected via the wiring harness 123. The battery management unit is used to determine the status of the battery cell assembly 200 based on the status information. By connecting the first connector 126 to the second connector, the status information of each busbar 122 collected by the multiple data lines 1231 of the wiring harness 123 can be transmitted to the battery management unit via the second connector. The battery management unit determines the status information of the battery cell 20 connected to the busbar 122 in the battery cell assembly 200 based on the received status information of the multiple busbars 122. For example, the status information may include voltage and / or temperature, enabling the battery management unit to promptly handle any abnormal status of the battery cell 20 in the battery cell assembly 200, thereby improving the reliability of the battery device 10.

[0076] In some embodiments, the battery management unit includes a plurality of second connectors, and the connection component 12 includes a plurality of first connectors 126. The plurality of second connectors and the plurality of first connectors 126 correspond one-to-one, so that the battery management unit receives data transmitted by the first connector 126 to which it is connected, through the plurality of second connectors. For example, if the connection component 12 includes two wire harnesses 123, and two corresponding first connectors 126 are provided, then the battery management unit includes two second connectors, each second connector connecting to one first connector 126, so that each second connector receives data from the corresponding first connector 126 for control purposes.

[0077] It should be understood that the battery management unit in this application embodiment can be a component within the battery device 10. For example, the battery management unit can be the battery management system (BMS) of the battery device 10 for ease of implementation.

[0078] In some embodiments, the internal routing of the printed circuit board (PCB) at the BMS end can be modified to allow the holes of the second connector to correspond to the holes 1261 of the first connector 126, thereby enabling the multiple data lines 1231 of the wire harness 123 connected to the first connector 126 to be arranged in sequence. For example, the second connector connected to the first connector 126 and the internal routing of the PCB can be designed according to the order in which the multiple data lines 1231 of the wire harness 123 are connected to the data acquisition area 125.

[0079] In some embodiments, the connection assembly 12 further includes a fixing membrane 124, with a plurality of busbar components 122 and wiring harnesses 123 located on the side of the fixing membrane 124 away from the battery cell 20. This fixing membrane 124 facilitates fixing the positions of the plurality of busbar components 122 and wiring harnesses 123. Furthermore, the fixing membrane can also serve an insulating function to isolate the first wall 201 of the battery cell 20 from other components. For example, it can be used to isolate the electrode terminals 202 of the first wall 201 from other metal components, thereby reducing the risk of short circuits and improving insulation performance.

[0080] In some embodiments, the fixing membrane 124 of this application embodiment can be fixed to the busbar component 122 and the wiring harness 123 in various ways. For example, multiple busbar components 122 and wiring harnesses 123 can be fixed to the fixing membrane 124 by hot pressing, that is, the fixing membrane 124 can be a hot-pressed membrane, the fixing method is easy to implement and the structure is stable.

[0081] The battery cell 20 of the present application embodiment will now be described with reference to the accompanying drawings.

[0082] Figure 6 A schematic diagram of the structure of a battery cell 20 according to an embodiment of this application is shown. For example, the battery cell 20 is shown. Figure 6 The battery cell 20 shown can be any one of the battery cells 20 in the battery device 10 of this application embodiment. For example... Figure 6 As shown, the battery cell 20 may include at least one electrode terminal 202, which includes at least one positive electrode terminal 2021 and / or at least one negative electrode terminal 2022. The positive electrode terminal 2021 is used for electrical connection to the positive electrode tab of the electrode assembly, and the negative electrode terminal 2022 is used for electrical connection to the negative electrode tab of the electrode assembly. The positive electrode terminal 2021 and the positive electrode tab can be directly connected or indirectly connected, and the negative electrode terminal 2022 and the negative electrode tab can be directly connected or indirectly connected. For example, the positive electrode terminal 2021 can be electrically connected to the positive electrode tab through a current collector, and the negative electrode terminal 2022 can be electrically connected to the negative electrode tab through a current collector.

[0083] In some embodiments, the electrode terminals 202 may be located on any one or more walls of the battery cell 20, and the multiple electrode terminals 202 may be located on the same or different walls. For example, the battery cell 20 may include a housing 204, and the electrode terminals 202 are disposed on the first wall 201 of the housing 204.

[0084] The outer casing 204 can be made of steel, aluminum, plastic (such as polypropylene), composite metal (such as copper-aluminum composite casing 204), or aluminum-plastic film, etc. In some embodiments, the outer casing 204 can be a sealed structure or a non-sealed structure. As an example, when the outer casing 204 is a non-sealed structure, it serves to protect the electrode assembly, and a sealing bag is included between the outer casing 204 and the electrode assembly. The sealing bag is used to encapsulate the electrode assembly and electrolyte. Specifically, the sealing bag can be a bag-shaped insulating component or an aluminum-plastic film. When the outer casing 204 is a sealed structure, it is used to encapsulate components such as the electrode assembly and electrolyte.

[0085] In some embodiments, the housing 204 includes an end cap and a housing, the housing having an opening, and the end cap covering the opening. The housing may have one or more openings. The end cap may also be provided one or more.

[0086] In some embodiments, a pressure relief mechanism 203 is provided on the casing 204 of the battery cell 20 of this application. The pressure relief mechanism 203 is used to release internal gas from the battery cell 20. As an example, the pressure relief mechanism 203 can be actuated to release internal pressure or temperature when the internal pressure or temperature of the battery cell 20 reaches a predetermined threshold. When the internal pressure or temperature of the battery cell 20 reaches the predetermined threshold, the pressure relief mechanism 203 performs an action or a weak structure provided in the pressure relief mechanism 203 is destroyed, thereby forming an opening or channel for internal pressure or temperature to be released. The threshold design varies depending on design requirements. The threshold may depend on the materials of one or more of the positive electrode, negative electrode, electrolyte, and separator in the battery cell 20.

[0087] The term "actuation" as used in this application refers to the pressure relief mechanism 203 being activated or undergoing a certain state, thereby releasing the internal pressure and temperature of the battery cell 20. The actions of the pressure relief mechanism 203 may include, but are not limited to: movement of components within the pressure relief mechanism 203 to form an exhaust channel, rupture, breakage, tearing, or opening of at least a portion of the pressure relief mechanism 203, etc. When the pressure relief mechanism 203 is actuated, the high-temperature, high-pressure substances inside the battery cell 20 are discharged outwards from the actuated portion as waste. This method enables pressure and temperature relief of the battery cell 20 under controllable pressure or temperature conditions, thereby preventing potentially more serious accidents.

[0088] As an example, the pressure relief mechanism 203 can be integrally formed with the housing 204. As an example, the pressure relief mechanism 203 can also be separately disposed from and connected to the housing 204. Furthermore, the pressure relief mechanism 203 can be located on any wall of the housing 204. For example, as... Figure 6 As shown, this application embodiment takes the first wall 201 as an example with a pressure relief mechanism 203, but this application embodiment is not limited to this.

[0089] In some embodiments, such as Figure 6 As shown, the first wall 201 is provided with two electrode terminals 202, and the pressure relief mechanism 203 is located between the two electrode terminals 202. Placing the electrode terminals 202 and the pressure relief mechanism 203 on the same wall of the housing 204 can improve the integration of the battery cells 20 and facilitate processing. For example, the first wall 201 can be an end cap included in the housing 204, on which both the electrode terminals 202 and the pressure relief mechanism 203 are provided, facilitating processing and assembly. Furthermore, placing the pressure relief mechanism 203 between the two electrode terminals 202 makes the first wall 201 relatively symmetrical, facilitating the thermal bonding assembly 12 to electrically connect the electrode terminals 202 of multiple battery cells 20, thereby improving the processing and assembly efficiency of the battery device 10.

[0090] In some embodiments, when the housing 204 is a non-sealed structure, the pressure relief mechanism 203 can be configured as a through hole for discharging gas inside the battery cell 20.

[0091] The emissions from the battery cell 20 mentioned in this application include, but are not limited to: electrolyte, dissolved or split positive and negative electrode plates, fragments of separators, high-temperature and high-pressure gases generated by the reaction, flames, etc.

[0092] In some embodiments, when a pressure relief mechanism 203 is provided on the first wall 201, the connecting assembly 12 is provided with a through hole 121 corresponding to the pressure relief mechanism 203. For example, the fixing membrane 124 of the connecting assembly 12 is provided with a through hole 121. The through hole 121 can be used to avoid the pressure relief mechanism 203 so that when the pressure relief mechanism 203 is actuated, the emissions discharged from the pressure relief mechanism 203 can be quickly discharged through the through hole 121, reducing the obstruction of the connecting assembly 12 to the emissions, improving the emission efficiency of the emissions, thereby reducing the risk of thermal diffusion between multiple battery cells 20 and improving the reliability of the battery device 10.

[0093] In some embodiments, the connection assembly 12 includes two wire harnesses 123, with a through hole 121 located between the two wire harnesses 123 to reduce the obstruction of the two wire harnesses 123 to the emissions discharged by the pressure relief mechanism 203, and also to reduce the impact of the high-temperature emissions on the wire harnesses 123, thereby improving the reliability of the battery device 10.

[0094] It should be understood that the structure, size, and number of through holes 121 of the connecting assembly 12 can be set according to the actual application. For example, the range of the orthographic projection of the through hole 121 toward the first wall 201 is usually greater than or equal to the pressure relief mechanism 203, so that the through hole 121 can fully expose the pressure relief mechanism 203 and reduce the obstruction effect of the connecting assembly 12 on the discharge.

[0095] In some embodiments, the shape of the through hole 121 of the connecting assembly 12 can be configured according to the shape of the pressure relief mechanism 203. For example, the shape of the through hole 121 projected onto the first wall 201 can be the same as or approximately the same as the shape of the pressure relief mechanism 203 on the surface of the first wall 201, to facilitate processing. For example, as Figure 6 As shown, on the surface of the first wall 201, the shape of the pressure relief mechanism 203 can be oval, and similarly, the shape of the through hole 121 projected onto the first wall 201 can also be oval.

[0096] It should be understood that the number of through holes 121 included in the connection component 12 of this application embodiment can be set according to actual application.

[0097] In some embodiments, the connecting component 12 is provided with a plurality of through holes 121 arranged along a first direction, and the plurality of through holes 121 correspond one-to-one with the pressure relief mechanisms 203 of a plurality of battery cells 20. For example... Figures 2 to 6 As shown, each through hole 121 corresponds to a pressure relief mechanism 203, so that the discharge from the corresponding pressure relief mechanism 203 is discharged through the through hole 121. In this way, the area occupied by all the through holes 121 in the connecting assembly 12 is smaller, which can improve the structural strength and stability of the connecting assembly 12 and reduce the risk of local damage to the connecting assembly 12.

[0098] Or, different from Figures 2 to 6 In the embodiment shown, the through hole 121 corresponds to the pressure relief mechanism 203 of multiple battery cells 20. That is, by setting the same through hole 121, it can be used to avoid the pressure relief mechanism 203 of multiple battery cells 20, reducing the number of through holes 121 provided on the connecting assembly 12, so as to facilitate processing.

[0099] According to some embodiments of this application, this application also provides a battery device 10, including a battery cell as described in any of the above embodiments.

[0100] According to some embodiments of this application, this application also provides an electrical device including the battery device described in any of the above embodiments, and the battery device is used to provide electrical energy to the electrical device.

[0101] The electrical equipment can be any of the aforementioned devices or systems that utilize battery devices.

[0102] This application provides an energy storage device 1, which 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 10 as described in any of the above embodiments. The multiple battery devices 10 are connected in series and / or in parallel via busbars 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.

[0103] 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, etc. The energy storage device 1 can store electrical energy as needed and output it when appropriate. For example, the energy storage device 1 can store electrical energy during off-peak hours and provide power to relevant users or electrical devices during peak hours. The energy storage system provided in this application embodiment can be any power system that requires the use of the energy storage device 1.

[0104] In some embodiments, the energy storage device 1 is an energy storage container or an energy storage cabinet.

[0105] In some embodiments, the energy storage device 1 may include a cabinet and one or more battery clusters, with the battery clusters housed in the cabinet.

[0106] In some embodiments, the energy storage device 1 may further 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. Exemplarily, at least some of the above modules may be housed within the storage chamber of the energy storage device 1.

[0107] As an example, the thermal management module may include a liquid cooling unit that supplies coolant to each battery device 10 via piping for regulating the temperature of the individual battery cells.

[0108] 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.

[0109] As an example, the central control module can serve as the battery management unit for energy storage device 1, used to monitor and manage it. The central control module can monitor information such as current, voltage, power, state of charge, and temperature of energy storage device 1. For example, it can control the charging and discharging current and voltage of energy storage device 1. 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.

[0110] As an example, a fire protection system includes control panels, detectors, alarm devices, etc., used to detect, alarm, or extinguish fires in energy storage systems.

[0111] As an example, the power distribution device can be used to distribute power to the power modules of the energy storage device 1.

[0112] According to some embodiments of this application, this application also provides an energy storage system, including the energy storage device 1 described in any of the above embodiments. Figure 7 A structural block diagram of an energy storage system according to an embodiment of this application is shown. In some embodiments, such as... Figure 7 As shown, the energy storage system may include one or more energy storage devices 1 and a power converter system (PCS) 2, wherein the power converter 2 is used to connect between the power generation device 3 and the energy storage device 1. The power generation device 3 is used to generate electrical energy, and the electrical energy generated by the power generation device 3 can be stored in the energy storage device 1 through the power converter 2. As an example, the power generation device 3 may specifically be a solar panel, a hydroelectric power generation device, a thermal power generation device, a wind power generation device, etc. The specific type of the power generation device 3 is not limited in this application.

[0113] According to some embodiments of this application, this application provides a charging network. Figure 8 A structural block diagram of a charging network according to an embodiment of this application is shown. Figure 8 As shown, the charging network includes a charging pile 4 and an energy storage device 1. The charging pile 4 is electrically connected to the energy storage device 1, which provides power to the charging pile 4. The charging pile 4 is electrically connected to a battery device in the energy storage device 1 via a cable, allowing the battery device to supply its stored energy to the charging pile 4. The charging pile 4 has one or more connectors 5 for connecting to electrical devices (such as vehicles) to replenish their power.

[0114] The energy storage device 1 can be located inside the charging pile (e.g., an integrated energy storage and charging unit) or outside the charging pile.

[0115] According to some embodiments of this application, see Figures 2 to 5 This application provides a battery device 10, including: a battery cell assembly 200 and a connection assembly 12. The battery cell assembly 200 includes a plurality of battery cells 20 arranged along a first direction, and each battery cell 20 has an electrode terminal 202 disposed on its first wall 201. The connection assembly 12 is disposed toward the first wall 201 of the plurality of battery cells 20, and the connection assembly 12 includes a wire harness 123 and a plurality of busbars 122 arranged along the first direction. The plurality of busbars 122 are used to electrically connect the electrode terminals 202 of the plurality of battery cells 20. 2 includes multiple data acquisition areas 125 arranged along a first direction, and wiring harness 123 includes multiple data lines 1231 arranged along a second direction; the multiple data lines 1231 correspond one-to-one with the multiple data acquisition areas 125, and the sampling ends of the multiple data lines 1231 arranged sequentially along the second direction are respectively connected to the multiple data acquisition areas 125 arranged sequentially along the first direction, so that each data line 1231 is used to acquire the status information of the corresponding bus component 122 of the corresponding data acquisition area 125, and the status information includes the voltage and / or temperature of the bus component 122.

[0116] The connection component 12 includes multiple rows of busbar components 122 arranged along a second direction and multiple wire harnesses 123 arranged along the second direction. The multiple rows of busbar components 122 correspond one-to-one with the multiple wire harnesses 123. Each row of busbar components 122 includes multiple busbar components 122 arranged along a first direction.

[0117] The connecting component 12 includes two wire harnesses 123. The first wall 201 is provided with a pressure relief mechanism 203. The connecting component 12 is provided with a through hole 121 corresponding to the pressure relief mechanism 203. The through hole 121 is located between the two wire harnesses 123. The through hole 121 corresponds to the pressure relief mechanism 203 of a plurality of battery cells 20. Alternatively, the connecting component 12 is provided with a plurality of through holes 121 arranged along a first direction. The plurality of through holes 121 correspond one-to-one with the pressure relief mechanism 203 of a plurality of battery cells 20.

[0118] The connection assembly 12 further includes a first connector 126, with the connection ends of multiple data lines 1231 corresponding one-to-one with multiple holes 1261 of the first connector 126, and the connection ends of the multiple data lines 1231 sequentially connected to the multiple holes 1261 of the first connector 126. The first connector 126 includes two rows of holes 1261, and the multiple data lines 1231 include two sets of data lines 1231 arranged along a second direction, with each set of data lines 1231 sequentially connected to a corresponding row of holes 1261. The connection assembly 12 includes multiple wire harnesses 123 and multiple first connectors 126 that correspond one-to-one.

[0119] The battery device 10 further includes a battery management unit, which includes a second connector for connecting to a first connector 126 and receiving status information collected via a wiring harness 123. The battery management unit is used to determine the status of the battery cell assembly 200 based on the status information. The battery management unit includes multiple second connectors, and the connection assembly 12 includes multiple first connectors 126, with each of the multiple second connectors corresponding to one of the multiple first connectors 126.

[0120] The connection assembly 12 also includes a fixing membrane 124, with multiple busbars 122 and wiring harnesses 123 located on the side of the fixing membrane 124 away from the battery cell 20. The multiple busbars 122 and wiring harnesses 123 are fixed to the fixing membrane 124 by heat pressing.

[0121] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this application, and not to limit them. Although this application has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application, and they should all be covered within the scope of the claims and specification of this application. In particular, as long as there is no structural conflict, the various technical features mentioned in the embodiments can be combined in any way. This application is not limited to the specific embodiments disclosed herein, but includes all technical solutions falling within the scope of the claims.

Claims

1. A battery device, characterized in that, include: A battery cell assembly (200) includes a plurality of battery cells (20) arranged along a first direction, and each battery cell (20) has an electrode terminal (202) disposed on its first wall (201). A connection assembly (12) is disposed facing the first wall (201) of a plurality of battery cells (20). The connection assembly (12) includes a wiring harness (123) and a plurality of busbars (122) arranged along a first direction. The plurality of busbars (122) are used for electrically connecting the electrode terminals (202) of the plurality of battery cells (20). The connection assembly (12) includes a plurality of data acquisition areas (125) arranged along the first direction. The wiring harness (123) includes a plurality of data acquisition areas (125) arranged along a second direction. Multiple data lines (1231); the multiple data lines (1231) correspond one-to-one with the multiple data acquisition areas (125), and the sampling ends of the multiple data lines (1231) arranged sequentially along the second direction are respectively connected to the multiple data acquisition areas (125) arranged sequentially along the first direction, so that each data line (1231) is used to collect the status information of the corresponding bus component (122) of the corresponding data acquisition area (125), the status information including the voltage and / or temperature of the bus component (122).

2. The battery device according to claim 1, characterized in that, The connection assembly (12) includes multiple columns of the busbar components (122) arranged along the second direction and multiple wire harnesses (123) arranged along the second direction. The multiple columns of the busbar components (122) correspond one-to-one with the multiple wire harnesses (123). Each column of the busbar components (122) includes multiple busbar components (122) arranged along the first direction.

3. The battery device according to claim 2, characterized in that, The connecting component (12) includes two wire harnesses (123), the first wall (201) is provided with a pressure relief mechanism (203), the connecting component (12) is provided with a through hole (121) corresponding to the pressure relief mechanism (203), and the through hole (121) is located between the two wire harnesses (123); Wherein, the through hole (121) corresponds to the pressure relief mechanism (203) of the plurality of battery cells (20), or, The connecting component (12) is provided with a plurality of through holes (121) arranged along the first direction, and the plurality of through holes (121) correspond one-to-one with the pressure relief mechanism (203) of the plurality of battery cells (20).

4. The battery device according to any one of claims 1 to 3, characterized in that, The connection component (12) further includes a first connector (126), the connection ends of the plurality of data lines (1231) correspond one-to-one with the plurality of holes (1261) of the first connector (126), and the connection ends of the plurality of data lines (1231) are sequentially connected to the plurality of holes (1261) of the first connector (126).

5. The battery device according to claim 4, characterized in that, The first connector (126) includes two rows of holes (1261), and the plurality of data lines (1231) include two sets of data lines (1231) arranged along the second direction, with each set of data lines (1231) sequentially connected to a corresponding row of holes (1261).

6. The battery device according to claim 4 or 5, characterized in that, The connection component (12) includes a plurality of wire harnesses (123) and a plurality of the first connectors (126) that correspond one-to-one.

7. The battery device according to any one of claims 4 to 6, characterized in that, The battery device also includes: A battery management unit, comprising a second connector for connecting to the first connector (126) and receiving status information collected through the wiring harness (123), wherein the battery management unit is used to determine the status of the battery cell assembly (200) based on the status information.

8. The battery device according to claim 7, characterized in that, The battery management unit includes a plurality of second connectors, and the connection component (12) includes a plurality of first connectors (126), with the plurality of second connectors and the plurality of first connectors (126) corresponding one-to-one.

9. The battery device according to any one of claims 1 to 8, characterized in that, The connection assembly (12) also includes a fixing membrane (124), with the plurality of the busbar components (122) and the wiring harness (123) located on the side of the fixing membrane (124) away from the battery cell (20).

10. The battery device according to claim 9, characterized in that, The multiple busbar components (122) and the wire harness (123) are fixed to the fixing film (124) by hot pressing.

11. The battery device according to any one of claims 1 to 10, characterized in that, The busbar component (122) is provided with at least one data acquisition area (125), which includes a voltage acquisition area and / or a temperature acquisition area.

12. An energy storage device, characterized in that, include: Multiple battery devices according to any one of claims 1 to 11, the battery devices being used to store or provide electrical energy.

13. An energy storage system, characterized in that, include: Power conversion device; The energy storage device as claimed in claim 12, wherein the power conversion device is used to electrically connect the power generation device and the energy storage device.

14. A charging network, characterized in that, include: Charging stations; The energy storage device as described in claim 12 or the energy storage system as described in claim 13, wherein the energy storage device is used to provide electrical energy to the charging pile.

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