Battery device

Abstract

According to the battery device provided by the invention, the wire harness collection assemblies in the battery device are directly connected with the battery management system, no intermediate circuit board or other parts are needed for switching, the design cost is reduced, the assembly efficiency is high, the board main bodies of the wire harness collection assemblies in the same collection unit are at least partially overlapped, the width of the wire harness collection assemblies is relatively small, and the assembly efficiency is high. The occupied space in the direction perpendicular to the arrangement direction of the battery cells is reduced, interference between the wiring harness collection assembly and other parts in the battery device is avoided, the wiring harness collection assembly is prevented from shielding an anti-explosion valve on the battery cells, and the working safety of the battery is facilitated. Moreover, the wire harness collection assembly is small in width, is easy to bend, and is convenient to be electrically connected with a battery management system. Particularly, a plurality of relatively independent wire harness acquisition assemblies are in plug-in fit with the battery management system, and the arrangement of plug-in ports on the battery management system is relatively flexible. In conclusion, on the premise that the energy density of the battery device is improved, the requirements for safety of the battery device and installation convenience of the battery management system are met.

Description

Technical Field

[0001] This utility model relates to the field of electric energy technology, specifically to a battery device. Background Technology

[0002] With the continuous development of science and technology, battery devices are being used more and more widely, especially in the field of electric vehicles.

[0003] Currently, battery devices include a housing containing at least one row of battery cells. Each battery cell row comprises several cells arranged in a predetermined direction, and multiple battery rows are connected in series and parallel to provide power. The battery device also includes a Flexible Flat Cable (FFC) for collecting operating parameters such as temperature from each cell. Typically, one battery cell row corresponds to one FFC. The FFC includes a flexible plate with several parallel wires inside. One end of each wire extends out of the flexible plate for electrical connection to a signal acquisition component. The other ends of all wires are integrated into a common connector at one end of the flexible plate for electrical connection to the battery device's circuit board, which then transmits the electrical signals to the battery management system. As the energy density of battery devices increases, the length of a row of battery cells also increases, and correspondingly, the parallel wires inside the flexible flat cable become wider, making the design of the connector ports on the connected circuit board increasingly difficult.

[0004] Therefore, how to solve the above-mentioned defects is a technical solution that urgently needs to be found by those skilled in the art. Utility Model Content

[0005] The purpose of this application is to provide a battery device that is easy to connect to the FFC and the battery management system and has high reliability.

[0006] This application provides a battery device, including:

[0007] At least one column of battery cells, each column of said battery cells comprising a plurality of battery cells arranged along a first direction;

[0008] At least one acquisition unit is provided, wherein the acquisition unit is used to acquire signals from the cells in a column of the battery cell group; the acquisition unit includes a first wiring harness acquisition component and a second wiring harness acquisition component, the battery cell group includes a first group and a second group along the first direction, the first wiring harness acquisition component is used to acquire signals from the cells in the first group, and the second wiring harness acquisition component is used to acquire signals from the cells in the second group; in a direction perpendicular to the acquisition surface of the battery pack, the main body of the first wiring harness acquisition component and the main body of the second wiring harness acquisition component are at least partially stacked;

[0009] A battery management system is located at one end of the cell assembly along the first direction, and both the first wiring harness acquisition component and the second wiring harness acquisition component are directly electrically connected to the battery management system.

[0010] In this embodiment, the first wire harness acquisition component and the battery management system, as well as the second wire harness acquisition component and the battery management system, are directly connected without the need for intermediate circuit boards or other components. This reduces design costs, eliminates some wire harness assembly and fixing processes, saves on process steps, improves assembly efficiency, and reduces the risk points of the product, making the product more competitive in the market.

[0011] In this embodiment, the main body of the wiring harness acquisition components in the same acquisition unit is at least partially stacked. This allows for signal acquisition from all cells in the same cell group using two or more stacked wiring harness acquisition components. The wiring harness acquisition components have a relatively small width, reducing the space occupied perpendicular to the cell arrangement direction, avoiding interference between the wiring harness acquisition components and other components in the battery device, and preventing the wiring harness acquisition components from obstructing the explosion-proof valves on the cells, thus improving battery safety. Furthermore, the small width of the wiring harness acquisition components makes them easy to bend, facilitating electrical connection with the battery management system. In particular, the multiple relatively independent wiring harness acquisition components can be plugged into the battery management system, allowing for flexible port settings on the battery management system. In summary, this approach can improve the energy density of the battery device while simultaneously addressing battery safety and ease of installation with the battery management system.

[0012] In one example, the first group and the second group are arranged along a first direction, and the distance from the first group to the battery management system is greater than the distance from the second group to the battery management system; the first harness acquisition component is disposed on the side of the second harness acquisition component facing the battery cell.

[0013] In one example, both the first and second wiring harness acquisition components include a connected board body and a bent section. The board body is parallel to the acquisition surface, and the board body is electrically connected to the battery management system through the bent section, which has at least two bending positions.

[0014] In one example, the bending segment includes a first bending segment connected to the plate body, the first bending segment being perpendicular to the plate body, and the first bending segment of the first wire harness acquisition component and the first bending segment of the second wire harness acquisition component at least partially overlapping in projection in a plane perpendicular to the first direction.

[0015] In one example, the bent segment is further provided with a constraint member to constrain the deformation of the bent segment.

[0016] In one example, the first bend segment is further connected to a second bend segment, and the length of the second bend segment of the first wire harness acquisition component is greater than the length of the second bend segment of the second wire harness acquisition component.

[0017] In one example, the bending segment includes an adjacent first segment and a second segment, the second segment being connected to the side of the first segment away from the main body of the board, and the second segment being folded over the side of the first segment facing the battery cell.

[0018] In one example, the Nth bend direction of the bend segment of the first wire harness acquisition component and the bend segment of the second wire harness acquisition component is the same or opposite, where N is an integer greater than 1.

[0019] In one example, the distance between the creases at the two ends of the first bent segment is greater than or equal to 5 mm.

[0020] In one example, the connection method between the first wire harness acquisition component and the battery management system, and the connection method between the second wire harness acquisition component and the battery management system, are both puncture connections. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the structure of a battery device provided in one embodiment of this application;

[0022] Figure 2 for Figure 1 A schematic diagram of the battery data acquisition device;

[0023] Figure 3 for Figure 2 A magnified view of a portion of the structure shown at point A.

[0024] in Figures 1 to 3 The one-to-one correspondence between the reference numerals and component names in the attached figures:

[0025] 100 Housing; 200 Cell Pack; 201 Cell; 300 Acquisition Unit; 310 First Wiring Harness Acquisition Assembly; 320 Second Wiring Harness Acquisition Assembly; 301 Board Body; 302 Sampling Section; 303 Connector Section; 304 Bending Section; 3041 First Bending Section of Second Wiring Harness Acquisition Assembly; 3042 Second Bending Section of Second Wiring Harness Acquisition Assembly; 3043 Third Bending Section of Second Wiring Harness Acquisition Assembly; 3044 Fourth Bending Section of Second Wiring Harness Acquisition Assembly; 3045 Fifth Bending Section of Second Wiring Harness Acquisition Assembly; 3041' First Bending Section of First Wiring Harness Acquisition Assembly; 3042' Second Bending Section of First Wiring Harness Acquisition Assembly; 3043' Third Bending Section of First Wiring Harness Acquisition Assembly; 330 Battery Management System; 340 Constraint Component; 350 Foam; 202 Busbar. Detailed Implementation

[0026] To enable those skilled in the art to better understand the technical solutions of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] This application provides a technical solution that facilitates the connection between the flexible circuit board in a battery device and the external environment. To enable those skilled in the art to better understand the technical solution of this application, the following detailed description of the embodiments is provided in conjunction with the accompanying drawings and specific examples.

[0028] Please refer to Figures 1 to 3 , Figure 1 This is a schematic diagram of the structure of a battery device provided in one embodiment of this application; Figure 2 for Figure 1 A schematic diagram of the battery data acquisition device; Figure 3 for Figure 2 A magnified view of a portion of the structure shown at point A.

[0029] like Figure 1 As shown in the figure, this application provides a battery device, including a housing 100, battery cells 201, a busbar 202, a data acquisition unit 300, and a battery management system 330. The battery cells 201 are numerous, each located inside the housing 100. The battery cells 201 are stacked along a first direction to form a column of battery cells 201. The first direction is the x-direction in the figure. That is, a column of battery cells 201 includes several battery cells 201 arranged along the first direction. The number of battery cells 201 in a column of battery cells 201 depends on the specific product. The housing 100 can have one column of battery cells 201, or at least two columns of battery cells 201 arranged along the y-direction. Each battery cell 201 has a positive terminal and a negative terminal. The terminals of all battery cells 201 can be connected in series or / and in parallel through the busbar 202 according to a set rule to form a whole. The battery cells 201 inside the housing 100 are also connected in series or / and in parallel through the busbar 202 to form a whole, thus forming a power supply for external power supply. The positive and negative terminals of the battery cells 201 can be made of single-component materials, such as copper or aluminum, which have good conductivity, or composite materials composed of different components, such as copper and aluminum, which have good conductivity, as long as good conductivity can be achieved.

[0030] In this embodiment, the bus 202 can be made of a metal with good conductivity, such as aluminum or copper.

[0031] The battery cell 201 can be a primary battery or a secondary battery, and can also be a lithium-sulfur battery, a sodium-ion battery, or a magnesium-ion battery. The type of battery cell 201 is not limited to the description in this application. The battery cell 201 can be cuboid, flat, cylindrical, or other shapes.

[0032] In this embodiment of the application, a data acquisition unit 300 is used to acquire signals from the cells 201 in a group of cells 201. Figure 1 The diagram shows a battery acquisition device comprising three acquisition units 300, each acquiring operating signals from one of the three groups of battery cells 201. These operating signals include, but are not limited to, temperature and pressure signals. Each acquisition unit 300 corresponds one-to-one with a group of battery cells 201. The number of acquisition units 300 is not limited to the three described herein and can be determined based on the specific number of groups of battery cells 201. Two or more acquisition units 300 can be arranged perpendicular to the direction in which the battery cells 201 are arranged, i.e., along the y-direction.

[0033] In this embodiment, each acquisition unit 300 includes two wire harness acquisition components. Each wire harness acquisition component has a sampling section 302, a board body 301, and a connector 303. The sampling section 302 is mainly used to acquire operating status signals such as temperature and pressure signals from the battery cell 201. The board body 301 has internal conductive lines for transmitting the temperature or pressure signals acquired by the sampling section 302 to the external battery management system 330. The battery management system 330 processes the signals transmitted from the wire harness acquisition components so that the user can know the operating status of the battery cell 201.

[0034] In this embodiment, the main function of the battery management system 330 is to intelligently manage and maintain each battery cell 201, monitor the status of the battery device, and prevent the battery device from overcharging or over-discharging. The specific structure of the battery management system 330 can be found in existing technologies and will not be described in detail herein.

[0035] The wire harness acquisition component in this embodiment can be a flexible circuit board, such as a flexible flat cable (FFC), which is a structure consisting of two layers of insulating foil sandwiching a flat copper foil. Alternatively, it can be a flexible printed circuit board (FPC), which uses chemical etching to create flexible printed circuitry. Of course, the flexible circuit board can also have other structures, as long as it serves the function of data transmission. Flexible circuit boards are typically flat to reduce space occupation.

[0036] In this embodiment, the number of wiring harness acquisition components in one acquisition unit 300 is two, namely a first wiring harness acquisition component 310 and a second wiring harness acquisition component 320. The battery cell 201 group includes a first group and a second group. The first wiring harness acquisition component 310 is used to acquire signals from the battery cells 201 in the first group, and the second wiring harness acquisition component 320 is used to acquire signals from the battery cells 201 in the second group. The first group and the second group can be divided according to certain rules. For example, if the battery cell 201 group has 2N battery cells 201, from the end away from the battery management system 330 to the direction of the battery management system 330, all battery cells 201 are defined as the first battery cell 201 to the 2Nth battery cell 201. The first battery cell 201 to the Nth battery cell 201 are divided into the first group, and the Nth battery cell 201 to the 2Nth battery cell 201 are divided into the second group. Alternatively, the battery cells 201 in even-numbered positions are divided into the first group, and the battery cells 201 in odd-numbered positions are divided into the second group. Other rules can also be used for the first and second groups, and the number of cells in the first and second groups is not necessarily equal. The grouping method for the first and second groups is not limited to that described herein. In particular, dividing the cells 201 in the cell group 201 into a first group and a second group arranged along the first direction can reduce the length of either the first wire harness acquisition component 310 or the second wire harness acquisition component 320, saving costs, and making it less prone to errors when connecting to the cells 201.

[0037] In this embodiment, the main body 301 of the first wiring harness acquisition component 310 and the main body 301 of the second wiring harness acquisition component 320 are at least partially stacked in a direction perpendicular to the acquisition surface of the battery pack 200. In this embodiment, the acquisition surface of the battery pack 200 is parallel to the XY plane defined by the x and y directions.

[0038] In this embodiment, the battery management system 330 is disposed at the first end of the battery pack 200 along the first direction x. The first wiring harness acquisition component 310 and the second wiring harness acquisition component 320 are both directly electrically connected to the battery management system 330. The first wiring harness acquisition component 310 and the second wiring harness acquisition component 320 can be plugged into the battery management system 330, or they can be soldered together, to transmit the signals acquired by the first wiring harness acquisition component 310 and the second wiring harness acquisition component 320 to the battery management system 330. Compared with soldering, plugging connection is easier to install and can save some labor costs. For example, a plug-in support can be provided on the battery management system 330, and the plug-in support has a plug interface, into which the gold finger end of the wiring harness acquisition component is inserted.

[0039] In this embodiment, the first wire harness acquisition component 310 and the battery management system 330, and the second wire harness acquisition component 320 and the battery management system 330 are directly connected, eliminating the need for intermediate circuit boards and other components for connection. This reduces design costs, eliminates some wire harness assembly and fixing processes, saves on process flow, improves assembly efficiency, and reduces the risk points of the product, making the product more competitive in the market.

[0040] In this embodiment, the main body 301 of the wiring harness acquisition components in the same acquisition unit 300 is at least partially stacked. This allows for signal acquisition from all cells 201 in the same group of cells 201 using two or more stacked wiring harness acquisition components. The wiring harness acquisition components have a relatively small width, reducing the space occupied perpendicular to the arrangement direction of the cells 201, avoiding interference between the wiring harness acquisition components and other components in the battery device, and preventing the wiring harness acquisition components from obstructing the explosion-proof valves on the cells 201, thus improving battery safety. Furthermore, the small width of the wiring harness acquisition components makes them easy to bend, facilitating electrical connection with the battery management system 330. In particular, the multiple relatively independent wiring harness acquisition components can be plugged into the battery management system 330, and the plug-in port settings on the battery management system 330 are also quite flexible. In summary, this approach can improve the energy density of the battery device while simultaneously addressing the needs for battery device safety and ease of installation with the battery management system 330.

[0041] In this embodiment, the first group and the second group are arranged along a first direction (x-direction). The distance from the first group to the battery management system 330 is greater than the distance from the second group to the battery management system 330. This results in the first harness acquisition component 310 having a longer transmission path than the second harness acquisition component 320, increasing the probability of bending and twisting. In this embodiment, the relative positions of the first harness acquisition component 310 and the second harness acquisition component 320 are set as follows.

[0042] In this embodiment of the application, the first wire harness acquisition component 310 is disposed on the side of the second wire harness acquisition component 320 facing the battery cell 201, that is, the first wire harness acquisition component 310 is located below the second wire harness acquisition component 320.

[0043] In this way, the second wire harness acquisition component 320 is located above the first wire harness acquisition component 310, which can effectively limit the bending and twisting of the first wire harness acquisition component 310.

[0044] Because there are many components in the battery device, the wiring harness acquisition component will avoid related components during assembly, depending on the specific situation. Therefore, the wiring harness acquisition component and the battery management system 330 can be connected in the following ways.

[0045] In this embodiment of the application, the first wire harness acquisition component 310 and the second wire harness acquisition component 320 both include a connected board body 301 and a bending section 304. The board body 301 is parallel to the acquisition surface. The board body 301 is electrically connected to the battery management system 330 through the bending section 304. The bending section 304 has at least two bending positions, and the two adjacent sections can be bent at approximately a 90-degree angle.

[0046] In other words, the main body 301 can be electrically connected to the battery management system 330 after being bent at least twice. This allows for avoidance of relevant components in the battery device, improves the flexibility of the connection, and the wire harness acquisition component remains relatively stable after bending, which also helps to ensure the connection stability between the wire harness acquisition component and the battery management system 330.

[0047] Figure 3 The diagram shows that the bending segment 304 of both the first wire harness acquisition component 310 and the second wire harness acquisition component 320 includes five bending segments. Taking the second wire harness acquisition component 320 as an example, the five bending segments are: the first bending segment 3041, the second bending segment 3042, the third bending segment 3043, the fourth bending segment 3044, and the fifth bending segment 3045.

[0048] In this embodiment, the bending segment 304 includes a first bending segment connected to the plate body 301. The first bending segment is perpendicular to the plate body 301. For clarity in describing the technical solution, this application uses different reference numerals to identify the first bending segment of the first wire harness acquisition component and the first bending segment of the second wire harness acquisition component 320. This application arranges the first bending segment 3041' of the first wire harness acquisition component and the first bending segment 3041' of the second wire harness acquisition component 320 to overlap at least partially in a plane perpendicular to the first direction. Figure 3 As can be seen, the first bending segment 3041' of the first wire harness acquisition component and the first bending segment 3041 of the second wire harness acquisition component 320 bend downwards, and the two partially overlap. This can fully improve space utilization.

[0049] Please refer to Figure 3 In the middle of the acquisition unit 300, in this embodiment of the application, the first bending segment is also connected to the second bending segment. The length of the second bending segment 3042' of the first wire harness acquisition component is greater than the length of the second bending segment 3042 of the second wire harness acquisition component 320. In this way, the second wire harness acquisition component 320 can further avoid the bending and twisting of the first wire harness acquisition component 310, and at the same time facilitate the process operation.

[0050] In this embodiment, a constraint member 340 is also provided on the bent segment 304 to constrain the deformation of the bent segment. The constraint member 340 can be provided on each bent segment, or it can be provided on only a few bent segments. Figure 3As can be seen, constraint members are set on the second bending segment 3042' and the third bending segment 3043' of the first wire harness acquisition component, as well as on the third bending segment 3043 of the second wire harness acquisition component. The constraint member can be a plastic sleeve, which, when fitted onto a bending segment, can constrain the bending segment to deform in a preset direction, making the shape of the bent wire harness acquisition component more stable. The constraint member structures on each bending segment can be the same or different.

[0051] In this embodiment, the bending segment includes an adjacent first segment and a second segment. The second segment is connected to the side of the first segment away from the main body 301, and the second segment is folded onto the side of the first segment facing the battery cell 201. This folding method can effectively prevent the wire harness acquisition assembly from warping. Figure 3 Taking the bending segment 304 of the second wire harness acquisition component 320 as an example, the second bending segment 3042 is folded relative to the first bending segment 3041 towards the battery cell. The second bending segment 3042 is located on the side of the first bending segment 3041 facing the battery cell. Similarly, the third bending segment 3043 is also folded relative to the second bending segment 3042 towards the battery cell.

[0052] In this embodiment of the application, the Nth bend direction in the bending segment of the first wire harness acquisition component 310 and the bending segment of the second wire harness acquisition component 320 is the same or opposite, where N is an integer greater than 1. For example... Figure 3 Taking the acquisition unit 300 in the middle as an example, during the first fold, the first wire harness acquisition component 310 and the second wire harness acquisition component 320 fold in the same direction, and the first bending segment 3041' of the first wire harness acquisition component and the first bending segment 3041 of the second wire harness acquisition component both bend downwards. During the second fold, the second bending segment 3042' of the first wire harness acquisition component 310 and the second bending segment 3042 of the second wire harness acquisition component 320 fold in opposite directions, with the first wire harness acquisition component 310 folding to the right and the second wire harness acquisition component 320 folding to the left. During the third fold, the third bending segment 3043' of the first wire harness acquisition component 310 and the third bending segment 3043 of the second wire harness acquisition component 320 fold in the same direction, both bending downwards.

[0053] Of course, the orientation of the bending section of the first wire harness acquisition component 310 and the bending section of the second wire harness acquisition component 320 is not limited to the manner described in this article, and can be reasonably set according to the specific application environment.

[0054] In this embodiment, the crease distance between the two ends of the first bent section of the battery device is greater than or equal to 5mm. For example, the crease distance between the two ends of the first bent section of the battery device can be 5mm, 6mm, 7mm, 8mm, or other values. When the crease distance between the two ends of the first bent section of the battery device is greater than or equal to 5mm, damage to the first wire harness acquisition component 310 and the second wire harness acquisition component 320 can be avoided as much as possible.

[0055] In this embodiment, the connection between the wiring harness acquisition component and the battery management system 330 is a puncture connection. The puncture process achieves the connection between the wiring harness acquisition component and the connector terminals (pins) on the battery management system 330, resulting in high assembly efficiency and relatively low cost.

[0056] In the above embodiments, during assembly, the box cover ( Figure 1 (Not shown in the image) A certain pressure will be applied to the wire harness acquisition component. In order to avoid damage to the wire harness acquisition component, elastic components such as foam 350 can also be set between the first wire harness acquisition component and the battery cell.

[0057] For other structural details of the battery device, please refer to existing technologies; these details will not be elaborated upon here.

[0058] The term "several" as used in this article refers to a number of uncertain quantities, usually two or more; and when "several" is used to indicate the quantity of certain components, it does not indicate the quantitative relationship between these components.

[0059] In the description of this application, it should be noted that, in the embodiments of this application, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first," "second," etc., may explicitly or implicitly include one or more of that feature.

[0060] In the description of the embodiments of this application, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, "linking" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. "Fixed connection" refers to a connection where the relative positional relationship remains unchanged after the connection.

[0061] The directional terms used in the embodiments of this application, such as "inner" and "outer," are merely for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this application, 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. Furthermore, unless otherwise stated in this application, "multiple" as used in this application refers to two or more.

[0062] In the description of embodiments of this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element.

[0063] In the embodiments of this application, "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, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0064] The above are merely preferred embodiments of this application. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of this application, and these improvements and modifications should also be considered within the scope of protection of this application.

Claims

1. A battery device, characterized by, include: At least one column of battery cells, each column of said battery cells comprising a plurality of battery cells arranged along a first direction; At least one acquisition unit is provided, wherein the acquisition unit is used to acquire signals from the cells in a column of the cell group; the acquisition unit includes a first wire harness acquisition component and a second wire harness acquisition component, the cell group includes a first group and a second group along the first direction, the first wire harness acquisition component is used to acquire signals from the cells in the first group, and the second wire harness acquisition component is used to acquire signals from the cells in the second group; in a direction perpendicular to the acquisition surface of the cell group, the first wire harness acquisition component and the second wire harness acquisition component are at least partially overlapped; A battery management system is located at one end of the cell assembly along the first direction, and both the first wiring harness acquisition component and the second wiring harness acquisition component are directly electrically connected to the battery management system.

2. The battery device of claim 1, wherein The first group and the second group are arranged along a first direction, and the distance from the first group to the battery management system is greater than the distance from the second group to the battery management system; the first harness acquisition component is disposed on the side of the second harness acquisition component facing the battery cell.

3. The battery device of claim 2, wherein Both the first wire harness acquisition component and the second wire harness acquisition component include a connected board body and a bent section. The board body is parallel to the acquisition surface. The board body is electrically connected to the battery management system through the bent section, and the bent section has at least two bending positions.

4. The battery device of claim 3, wherein The bending segment includes a first bending segment connected to the main body of the plate, the first bending segment being perpendicular to the main body of the plate, and the first bending segment of the first wire harness acquisition component and the first bending segment of the second wire harness acquisition component being at least partially overlapped in a plane perpendicular to the first direction.

5. The battery device of claim 4, wherein The bending section is also provided with a constraint member to constrain the deformation of the bending section.

6. The battery device of claim 4, wherein The first bending segment is also connected to a second bending segment, and the length of the second bending segment of the first wire harness acquisition component is greater than the length of the second bending segment of the second wire harness acquisition component.

7. The battery device of claim 3, wherein The bending segment includes an adjacent first segment and a second segment, the second segment being connected to the side of the first segment away from the main body of the plate, and the second segment being folded over the side of the first segment facing the battery cell.

8. The battery device of claim 3, wherein The Nth bend direction in the bending segment of the first wire harness acquisition component and the bending segment of the second wire harness acquisition component is the same or opposite, where N is an integer greater than 1.

9. The battery device of claim 4, wherein The distance between the creases at both ends of the first bent section is greater than or equal to 5 mm.

10. The battery device of claim 3, wherein The connection method between the wiring harness acquisition component and the battery management system is a puncture connection.

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