Battery cell assembly and vehicle

Abstract

This utility model relates to the field of new energy battery management technology, specifically to a battery unit assembly and a vehicle. The battery unit assembly includes: a main control board body, comprising a first rigid plate and a second rigid plate; a flexible connector, the two ends of which are respectively connected to the corresponding ends of the first and second rigid plates; the main control board structure of the battery monitoring unit has a flat shape and a bent shape; in the flat shape, the first and second rigid plates are arranged coplanarly or parallel; in the bent shape, the first and second rigid plates are spaced apart, and the flexible connector is bent. By placing the main control board flat or bent, the mounting part of the battery energy distribution unit is structurally adapted, improving the space utilization of the main control board, thereby increasing the energy density of the battery pack.

Description

Technical Field

[0001] This utility model relates to the field of new energy battery management technology, specifically to a battery cell assembly and a vehicle. Background Technology

[0002] With the rapid development of electric vehicle technology, battery pack designs are becoming increasingly integrated and compact to improve space utilization and energy density. As the core control system of the battery pack, the BMS (Battery Management System) also needs corresponding optimization and upgrades. However, in related technologies, the BMU (Battery Monitor Unit) still adopts a traditional modular design, consisting of a PCBA (Printed Circuit Board Assembly) plus an independent metal / plastic housing, and uses wiring harnesses and connectors for external communication and power supply.

[0003] This structural design results in low battery pack space utilization, thus limiting the vehicle's range. Since the independent housing BMU requires additional installation space, it may directly lead to a reduction in battery capacity and affect the vehicle's range. Utility Model Content

[0004] In view of this, the present invention provides a battery cell assembly and vehicle to solve the problems of low space utilization and low energy density of the modular BMU design.

[0005] This utility model provides a battery unit assembly, including: a battery monitoring unit main control board structure, the battery monitoring unit main control board structure including: a main control board body, including a first rigid plate and a second rigid plate; a flexible connector, the two ends of which are respectively connected to the corresponding ends of the first rigid plate and the second rigid plate; the first rigid plate and the second rigid plate are arranged coplanarly or parallel; the aspect ratio of the first rigid plate and the second rigid plate is in the range of 1 to 4; the battery unit assembly further includes: a first battery energy distribution unit, the battery monitoring unit main control board structure being hot-riveted and fixedly installed to the first battery energy distribution unit.

[0006] Beneficial Effects: When the main control board structure is installed within the battery pack, taking the PCBA as an example, the main control board structure of the battery monitoring unit is installed within the battery energy distribution unit, and the battery energy distribution unit is installed within the vehicle's battery pack. By adopting a split design for the main control board structure, the independent structural component of the BMU is eliminated, and the PCBA of the main control board is integrated into the battery energy distribution unit. This reduces the space required for the main control board and improves the space utilization rate of the entire vehicle's battery pack. When the main control board is laid flat, its aspect ratio is reduced while maintaining structural strength. This allows the main control board to meet the aspect ratio installation requirements while adapting to the installation space of the battery energy distribution unit, improving the space utilization rate of the main control board and thus increasing the energy density of the battery pack. Limiting the aspect ratio of the first and second rigid boards reduces the risk of deformation of the first and second rigid boards, while optimizing the structural layout and improving space utilization. Installing the main control board into the battery energy distribution unit through hot riveting improves the structural reliability of the main control board and enhances its resistance to mechanical stress.

[0007] In one alternative embodiment, the first rigid plate and the second rigid plate are connected to the flexible connector by welding.

[0008] Beneficial effects: After welding, the rigid plate and the flexible connector form an integral structure, resulting in a more uniform stress distribution when bending. At the same time, there is no risk of mechanical loosening after welding, making it suitable for vehicle environments and avoiding poor contact caused by long-term vibration.

[0009] In one optional embodiment, the main control board structure of the battery monitoring unit further includes a low-voltage signal processing unit disposed on the first rigid board; the main control board structure of the battery monitoring unit further includes a high-voltage signal processing unit disposed on the second rigid board.

[0010] Beneficial effects: By setting the low-voltage signal processing unit and the high-voltage signal processing unit on the first hard board and the second hard board respectively, the high-voltage part and the low-voltage part are functionally partitioned, which improves the signal anti-interference ability and enhances the safety and reliability of the main control board.

[0011] In one alternative implementation, the low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected via a flexible connector.

[0012] Beneficial effects: Electrically connecting the low-voltage signal processing unit and the high-voltage signal processing unit with flexible connectors optimizes signal transmission capabilities, reduces connection costs, and improves structural durability.

[0013] In one optional implementation, the low-voltage signal processing unit includes at least one of the following: a power management module, an MCU module, a slave board / high-voltage board communication module, a CAN communication module, a low-voltage digital / analog signal module, a drive module, a charging management module, and a signal connection port; and / or, the high-voltage signal processing unit includes at least one of the following: a power supply module, a low-voltage board communication module, a high-voltage module, a current module, an insulation monitoring module, a drive signal conversion module, and a signal connection port.

[0014] Beneficial effects: By designing the low-voltage signal processing unit and the high-voltage signal processing unit into finely partitioned functional modules and interconnecting them through flexible connectors, a partitioned design approach that improves performance, reduces costs, and enhances reliability is achieved.

[0015] This utility model also provides a battery unit assembly, including: a battery monitoring unit main control board structure, the battery monitoring unit main control board structure including: a main control board body, including a first rigid plate and a second rigid plate; a flexible connector, the two ends of the flexible connector being connected to the corresponding ends of the first rigid plate and the second rigid plate respectively; the aspect ratio of the first rigid plate and the second rigid plate is in the range of 1 to 4, the first rigid plate and the second rigid plate are arranged at intervals relative to each other, and the flexible connector is bent; the battery unit assembly further includes: a fixing frame and a second battery energy distribution unit, the battery monitoring unit main control board structure is fixedly installed by the fixing frame, the fixing frame is fixedly installed to the second battery energy distribution unit, and the fixing frame and the second battery energy distribution unit are connected by fasteners.

[0016] Beneficial Effects: When the main control board structure is installed within the battery pack, taking the PCBA as an example, the battery monitoring unit's main control board structure is installed within the battery energy distribution unit, which is then integrated into the vehicle's battery pack. This eliminates the independent structural component of the BMU, integrating the main control board's PCBA into the battery energy distribution unit, reducing the space required for the main control board and improving the overall battery pack's space utilization. By reducing the aspect ratio while maintaining structural strength in a bent configuration, the main control board can meet the aspect ratio installation requirements while adapting to the installation space of the battery energy distribution unit, improving the main control board's space utilization and consequently increasing the battery pack's energy density. Limiting the aspect ratio of the first and second rigid boards reduces the risk of deformation for both, while optimizing the structural layout and improving space utilization. Installing the battery monitoring unit's main control board structure in a bent configuration using a dedicated mounting bracket enhances the main control board's installation stability and vibration resistance. The mounting bracket is connected to the second battery energy distribution unit by fasteners. The fastener connection is easy to install and disassemble, facilitating maintenance and replacement, while also giving the mounting bracket a certain structural strength.

[0017] In one optional embodiment, the main control board structure of the battery monitoring unit further includes a low-voltage signal processing unit disposed on the first rigid board; the main control board structure of the battery monitoring unit further includes a high-voltage signal processing unit disposed on the second rigid board.

[0018] Beneficial effects: By setting the low-voltage signal processing unit and the high-voltage signal processing unit on the first hard board and the second hard board respectively, the high-voltage part and the low-voltage part are functionally partitioned, which improves the signal anti-interference ability and enhances the safety and reliability of the main control board.

[0019] In one optional embodiment, the low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected via a flexible connector. The low-voltage signal processing unit includes at least one of the following: a power management module, an MCU module, a slave / high-voltage board communication module, a CAN communication module, a low-voltage digital / analog signal processing module, a drive module, a charging management module, and a signal connection port; and / or, the high-voltage signal processing unit includes at least one of the following: a power supply module, a low-voltage board communication module, a high-voltage module, a current module, an insulation monitoring module, a drive signal conversion module, and a signal connection port.

[0020] Beneficial effects: Electrically connecting the low-voltage and high-voltage signal processing units via flexible connectors optimizes signal transmission capabilities, reduces connection costs, and improves structural durability. The refined partitioning design of the low-voltage and high-voltage signal processing units according to functional modules, and their interconnection via flexible connectors, achieves a partitioned design approach that improves performance, reduces costs, and enhances reliability.

[0021] This utility model also provides a vehicle, including a vehicle body and the aforementioned battery unit assembly, wherein the battery unit assembly is installed on the vehicle body. Attached Figure Description

[0022] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0023] Figure 1 This is a schematic diagram of the main control board structure of the battery monitoring unit of this utility model in a flat layout.

[0024] Figure 2 This is a schematic diagram showing the flat layout of the main control board structure of the battery monitoring unit of this utility model and the installation of the first battery energy distribution unit.

[0025] Figure 3 This is a schematic diagram of the bent shape of the main control board structure of the battery monitoring unit of this utility model;

[0026] Figure 4 This is a schematic diagram showing the bending shape of the main control board structure of the battery monitoring unit of this utility model and the installation of the fixing frame;

[0027] Figure 5 This is a schematic diagram showing the bending shape of the main control board structure of the battery monitoring unit of this utility model and the installation of the second battery energy distribution unit;

[0028] Figure 6 This is a schematic diagram of the functional partitioning of the first and second rigid boards of this utility model.

[0029] Explanation of reference numerals in the attached figures:

[0030] 1. Main control board body; 11. First rigid board; 12. Second rigid board; 2. Flexible connector; 3. First battery energy distribution unit; 4. Fixing frame; 5. Second battery energy distribution unit; L, long side of rigid board; W, short side of rigid board. Detailed Implementation

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

[0032] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0033] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" 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 mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0035] As electric vehicle battery packs become increasingly integrated and compact, the traditional modular design of the BMU (Battery Monitoring Unit)—which uses a PCBA with an independent metal / plastic housing and communication and power supply via wiring harnesses and connectors—is gradually showing its limitations. This design suffers from problems such as large space occupation, low thermal management efficiency, and insufficient connector vibration reliability, which contradicts the battery pack's requirements for ultra-thin structures and high energy density.

[0036] In other words, the above-mentioned structural design results in low space utilization of the battery pack, limiting the vehicle's range. The independent housing of the BMU requires additional installation space, potentially leading to a reduction in battery capacity and impacting the vehicle's range. Increased battery pack height also affects interior comfort. Since the BMU is typically located on the upper part of the battery pack (such as above the cell modules or high-voltage distribution box), its independent housing structure necessitates a raised space for the battery pack cover, increasing the overall height and resulting in a raised rear floor. This is especially noticeable in pure electric vehicles, where the traditional BMU installation method creates a significant bulge in the second-row center aisle or under the seats, reducing vertical legroom and impacting passenger comfort. Furthermore, the use of traditional wiring harness connectors (such as high-voltage sampling lines and communication interfaces) increases the complexity and cost of the BMS system, while integrated design reduces the number of connectors and saves costs. This invention provides a battery monitoring unit main control board structure to address the problems of low space utilization and low energy density in battery packs caused by modular BMU designs.

[0037] The following is combined with Figures 1 to 6 The following describes embodiments of the present invention.

[0038] Example 1

[0039] According to an embodiment of this utility model, a battery cell assembly is provided, including: a battery monitoring unit main control board structure and a first battery energy distribution unit. The battery monitoring unit main control board structure includes: a main control board body 1, including a first rigid plate 11 and a second rigid plate 12; a flexible connector 2, the two ends of which are respectively connected to the corresponding ends of the first rigid plate 11 and the second rigid plate 12; the first rigid plate 11 and the second rigid plate 12 are arranged coplanarly or parallel, in which case the flexible connector 2 is in a straight or bent state; the aspect ratio of the first rigid plate 11 and the second rigid plate 12 is in the range of 1 to 4. The battery monitoring unit main control board structure is hot-riveted and fixedly installed to the first battery energy distribution unit 3.

[0040] It is worth noting that by using hot riveting to fix the main control board to the battery energy distribution unit, the structural reliability of the main control board is improved and its resistance to mechanical stress is enhanced.

[0041] Specifically, the BDU housing of the first battery energy distribution unit 3 has a protruding column, and the first rigid plate 11 and the second rigid plate 12 have holes. The column is inserted into the hole, heated and riveted to deform it, so as to engage and limit it with the first rigid plate 11 and the second rigid plate 12.

[0042] It should be noted that in this embodiment, the first rigid plate 11 and the second rigid plate 12 are arranged in the same plane or in parallel, and the flexible connector 2 is in a straight or bent state.

[0043] To optimize the internal space layout of the battery pack and improve energy density, the main control board adopts a split integrated design, eliminating the traditional independent structural component of the BMU and instead embedding the main control board PCBA directly inside the Battery Energy Distribution Unit (BDU). This flat integration scheme not only reduces the structural complexity inside the battery pack but also further increases battery energy density by improving space utilization. It also provides greater flexibility for lightweight design and scalability of the battery system. Limiting the aspect ratio of the first rigid board 11 and the second rigid board 12 helps avoid the deformation risk caused by large flatness, while optimizing the structural layout and improving space utilization.

[0044] Specifically, in this embodiment, please refer to Figure 1 Taking the second rigid plate 12 as an example, the length of the second rigid plate 12 is L and the width of the second rigid plate 12 is W. Therefore, the aspect ratio of the second rigid plate 12 is L / W, that is, the value range of L / W is from 1 to 4.

[0045] Optionally, the aspect ratio of the first rigid plate 11 and the aspect ratio of the second rigid plate 12 can be any value from 1, 1.5, 2, 2.5, 3, 3.5, 4, or a value between any two of them.

[0046] It is worth noting that the aspect ratio of the first rigid plate 11 and the aspect ratio of the second rigid plate 12 can be the same or different.

[0047] It should be noted that in related technologies, in order to meet the adaptation requirements of different installation spaces while accommodating sufficient circuit content, the main control board structure typically has two aspect ratios: 3.2:2.1 and 7:1, which means two different PCBA designs are required, making it impossible to achieve platformization requirements. However, in this embodiment, the main control board structure can be set as two PCB boards with an aspect ratio of 3.5:1, connected by a flexible connector 2. This improves the structural strength of each PCB board to reduce the risk of structural failure, while also adapting to different BDU housings to meet platformization requirements.

[0048] It is worth noting that the battery energy distribution unit includes a BDU housing, within which an installation space is formed for mounting the main control board structure of the battery monitoring unit. For example... Figure 2 As shown, the BDU shell has a large length-to-width ratio (i.e., it is more elongated), therefore, the corresponding Figure 2 The BDU housing shown has the battery monitoring unit main control board structure set in a flat shape.

[0049] It should be noted that the corresponding ends of the first rigid plate 11 and the second rigid plate 12 connected to the two ends of the flexible connector 2 refer to one end of the first rigid plate 11 along the length direction and one end of the second rigid plate 12 along the length direction. That is, the main control board structure of the battery monitoring unit extends along the length direction of the first rigid plate 11 and the second rigid plate 12.

[0050] It should be further explained that, in the flat layout, the first rigid board 11 and the second rigid board 12 being arranged in the same plane or in parallel means that the surface of the first rigid board 11 and the surface of the second rigid board 12 are set in the same plane.

[0051] Furthermore, the first rigid plate 11 and the second rigid plate 12 are connected to the flexible connector 2 by welding. That is, one end of the first rigid plate 11 along its length is welded to the first end of the flexible connector 2, and one end of the second rigid plate 12 along its length is welded to the second end of the flexible connector 2. The first end and the second end of the flexible connector 2 are opposite ends of the flexible connector 2. With this configuration, the rigid plate and the flexible connector 2 form an integral structure after welding, and there is no risk of mechanical loosening after welding, which is suitable for the vehicle environment and avoids poor contact caused by long-term vibration.

[0052] In this embodiment, combined with Figure 6As shown, the main control board structure of the battery monitoring unit also includes a low-voltage signal processing unit, which is located on the first rigid board 11; the main control board structure of the battery monitoring unit also includes a high-voltage signal processing unit, which is located on the second rigid board 12. That is, the first rigid board 11 is the low-voltage board, and the second rigid board 12 is the high-voltage board. By setting the high and low voltage signal processing units on the first rigid board 11 and the second rigid board 12 respectively, the functions are divided, making the functions more modular, the application more flexible, and improving the signal anti-interference capability, thereby enhancing the safety and reliability of the main control board.

[0053] Furthermore, the low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected via flexible connector 2. This electrical connection optimizes signal transmission capabilities, reduces connection costs, and enhances structural durability.

[0054] Specifically, in this embodiment, the flexible connector 2 is an FPC (Flexible Printed Circuit).

[0055] It is worth noting that the FPC not only serves to connect the first rigid board 11 and the second rigid board 12 in terms of structure, but also plays a role in the electrical connection between high voltage and low voltage. Specifically, it provides power supply connection, communication, analog signal connection, and drive signal connection between the low voltage board and the high voltage board.

[0056] Specifically, the low-voltage signal processing unit is a low-voltage signal processing unit, and the high-voltage signal processing unit is a high-voltage signal processing unit. The low-voltage signal processing unit includes at least one of the following: a power management module, an MCU module, a slave / high-voltage board communication module, a CAN communication module, a low-voltage digital / analog signal processing module, a drive module, a charging management module, and a signal connection port; and / or, the high-voltage signal processing unit includes at least one of the following: a power supply module, a low-voltage board communication module, a high-voltage module, a current module, an insulation monitoring module, a drive signal conversion module, and a signal connection port. The low-voltage and high-voltage signal processing units are finely partitioned according to their high and low voltage signal processing functional modules, and interconnected through flexible connectors 2, achieving a partitioned design that improves performance, reduces cost, and enhances reliability.

[0057] Example 2

[0058] According to the embodiments of this utility model, in conjunction with Figure 3 , Figure 4 and Figure 5As shown, a battery cell assembly is provided, including: a main control board body 1, including a first rigid plate 11 and a second rigid plate 12; a flexible connector 2, the two ends of which are respectively connected to the corresponding ends of the first rigid plate 11 and the second rigid plate 12; the first rigid plate and the second rigid plate are arranged at intervals relative to each other, and the flexible connector is bent; the aspect ratio of the first rigid plate 11 and the second rigid plate 12 is in the range of 1 to 4; the battery cell assembly further includes: a fixing frame and a second battery energy distribution unit, the main control board structure of the battery monitoring unit is fixedly installed by the fixing frame, the fixing frame is fixedly installed to the second battery energy distribution unit, and the fixing frame and the second battery energy distribution unit are connected by fasteners.

[0059] It is worth noting that, please refer to Figure 4 The main control board structure in a bent shape is surrounded on the fixing frame 4, that is, at least part of the fixing frame 4 is located between the first rigid plate 11 and the second rigid plate 12 which are relatively spaced apart.

[0060] Specifically, the mounting bracket 4 and the second battery energy distribution unit 5 are connected by bolts. The bolted connection between the mounting bracket 4 and the second battery energy distribution unit 5 is convenient for installation and disassembly, facilitating maintenance and replacement, while also giving the mounting bracket 4 a certain structural strength.

[0061] It is worth noting that the first rigid plate 11 and the second rigid plate 12 of the bent main control board structure can be fixed to the mounting bracket 4 by hot riveting, and then the mounting bracket 4 is fixed to the BDU housing of the second battery energy distribution unit 5 by bolt connection.

[0062] To optimize the internal space layout of the battery pack and improve energy density, the main control board adopts a split integrated design, eliminating the traditional independent structural component of the BMU and instead embedding the main control board PCBA directly inside the Battery Energy Distribution Unit (BDU). This bent-shape integration scheme not only reduces the structural complexity inside the battery pack but also further increases battery energy density by improving space utilization. It also provides greater flexibility for the lightweight design and scalability of the battery system. Limiting the aspect ratio of the first rigid board 11 and the second rigid board 12 helps avoid the deformation risk caused by large flatness, while optimizing the structural layout and improving space utilization.

[0063] Specifically, in this embodiment, please refer to Figure 1 Taking the second rigid plate 12 as an example, the length of the second rigid plate 12 is L and the width of the second rigid plate 12 is W. Therefore, the aspect ratio of the second rigid plate 12 is L / W, that is, the value range of L / W is from 1 to 4.

[0064] Optionally, the aspect ratio of the first rigid plate 11 and the aspect ratio of the second rigid plate 12 can be any value from 1, 1.5, 2, 2.5, 3, 3.5, 4, or a value between any two of them.

[0065] It is worth noting that the aspect ratio of the first rigid plate 11 and the aspect ratio of the second rigid plate 12 can be the same or different.

[0066] It should be noted that in related technologies, in order to meet the adaptation requirements of different installation spaces while accommodating sufficient circuit content, the main control board structure typically has two aspect ratios: 3.2:2.1 and 7:1. This requires two different PCBA designs, making it impossible to achieve platformization requirements. By setting the main control board structure as two PCBs with an aspect ratio of 3.5:1 and connecting them with flexible connector 2, the main control board structure has a bending shape. This improves the structural strength of each PCB to reduce the risk of structural failure, while also adapting to the BDU housing to meet platformization requirements.

[0067] It is worth noting that the battery energy distribution unit includes a BDU housing, within which an installation space is formed for mounting the main control board structure of the battery monitoring unit. For example... Figure 5 As shown, the BDU housing has two structural forms. Figure 5 The BDU casing shown has a relatively small length-to-width ratio (i.e., it is somewhat square), therefore, corresponding Figure 5 The BDU housing shown has the battery monitoring unit main control board structure set in a bent shape.

[0068] It should be noted that the corresponding ends of the first rigid plate 11 and the second rigid plate 12 connected to the two ends of the flexible connector 2 refer to one end of the first rigid plate 11 along the length direction and one end of the second rigid plate 12 along the length direction. That is, the main control board structure of the battery monitoring unit extends along the length direction of the first rigid plate 11 and the second rigid plate 12.

[0069] It should be further explained that, in the bending configuration, the relative spacing between the first rigid plate 11 and the second rigid plate 12 means that the surface of the first rigid plate 11 and the surface of the second rigid plate 12 are relatively spaced apart.

[0070] Furthermore, the first rigid plate 11 and the second rigid plate 12 are connected to the flexible connector 2 by welding. That is, one end of the first rigid plate 11 along its length is welded to the first end of the flexible connector 2, and one end of the second rigid plate 12 along its length is welded to the second end of the flexible connector 2. The first end and the second end of the flexible connector 2 are opposite ends of the flexible connector 2. With this configuration, the rigid plate and the flexible connector 2 form an integral structure after welding, resulting in a more uniform stress distribution during bending. At the same time, there is no risk of mechanical loosening after welding, making it suitable for the vehicle environment and avoiding poor contact caused by long-term vibration.

[0071] In this embodiment, combined with Figure 6 As shown, the main control board structure of the battery monitoring unit also includes a low-voltage signal processing unit, which is located on the first rigid board 11; the main control board structure of the battery monitoring unit also includes a high-voltage signal processing unit, which is located on the second rigid board 12. That is, the first rigid board 11 is the low-voltage board, and the second rigid board 12 is the high-voltage board. By setting the high and low voltage signal processing units on the first rigid board 11 and the second rigid board 12 respectively, the functions are divided, making the functions more modular, the application more flexible, and improving the signal anti-interference capability, thereby enhancing the safety and reliability of the main control board.

[0072] Furthermore, the low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected via flexible connector 2. This electrical connection optimizes signal transmission capabilities, reduces connection costs, and enhances structural durability.

[0073] Specifically, in this embodiment, the flexible connector 2 is an FPC (Flexible Printed Circuit).

[0074] It is worth noting that the FPC not only serves to connect the first rigid board 11 and the second rigid board 12 in terms of structure, but also plays a role in the electrical connection between high voltage and low voltage. Specifically, it provides power supply connection, communication, analog signal connection, and drive signal connection between the low voltage board and the high voltage board.

[0075] Specifically, the low-voltage signal processing unit is a low-voltage signal processing unit, and the high-voltage signal processing unit is a high-voltage signal processing unit. The low-voltage signal processing unit includes at least one of the following: a power management module, an MCU module, a slave / high-voltage board communication module, a CAN communication module, a low-voltage digital / analog signal processing module, a drive module, a charging management module, and a signal connection port; and / or, the high-voltage signal processing unit includes at least one of the following: a power supply module, a low-voltage board communication module, a high-voltage module, a current module, an insulation monitoring module, a drive signal conversion module, and a signal connection port. The low-voltage and high-voltage signal processing units are finely partitioned according to their high and low voltage signal processing functional modules, and interconnected through flexible connectors 2, achieving a partitioned design that improves performance, reduces cost, and enhances reliability.

[0076] As can be seen from Embodiments 1 and 2, the flat and bent configurations are based on two adaptation types of the battery energy distribution unit, and the flexible connector 2 enables two layouts of the main control board: in the flat configuration, the aspect ratio is optimized to enhance structural rigidity while reducing space occupation; while in the bent configuration, by selecting a suitable length of flexible connector 2 and leveraging its bendability, the main control board structure can adapt to different installation spaces, meeting the assembly requirements of compact spaces. Furthermore, the battery energy distribution unit undergoes structural optimization to ensure stable fixation of the main control board structure in both configurations, avoiding reliability issues caused by vibration or impact.

[0077] Example 3

[0078] According to an embodiment of this utility model, a vehicle is also provided, including a vehicle body and the aforementioned battery unit assembly, wherein the battery unit assembly is installed in the vehicle body. Integrating the battery unit assembly into the vehicle enables the fusion of the battery unit of the separate management system with the vehicle body, further improving the space utilization of the battery pack and increasing the overall vehicle range.

[0079] Obviously, the above embodiments are merely examples for clear illustration and are not intended to limit the implementation. Although embodiments of the present invention have been described in conjunction with the accompanying drawings, those skilled in the art can make various modifications and variations without departing from the spirit and scope of the present invention, and all such modifications and variations fall within the scope defined by the present invention.

Claims

1. A battery cell assembly, characterized in that, include: The battery monitoring unit main control board structure includes: The main control board body (1) includes a first rigid board (11) and a second rigid board (12); A flexible connector (2) is provided, with its two ends connected to the corresponding ends of the first rigid plate (11) and the second rigid plate (12), respectively. The first rigid plate (11) and the second rigid plate (12) are arranged in the same plane or in parallel. The aspect ratio of the first rigid plate (11) and the second rigid plate (12) is in the range of 1 to 4; The battery unit assembly further includes: a first battery energy distribution unit (3), and the main control board structure of the battery monitoring unit is hot-riveted and fixed to the first battery energy distribution unit (3).

2. The battery cell assembly according to claim 1, characterized in that, The first rigid plate (11) and the second rigid plate (12) are connected to the flexible connector (2) by welding.

3. The battery cell assembly according to any one of claims 1-2, characterized in that, The main control board structure of the battery monitoring unit also includes a low-voltage signal processing unit, which is disposed on the first rigid board (11). And / or, the main control board structure of the battery monitoring unit further includes a high-voltage signal processing unit, which is disposed on the second rigid board (12).

4. The battery cell assembly according to claim 3, characterized in that, The low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected through the flexible connector (2).

5. The battery cell assembly according to claim 3, characterized in that, The low-voltage signal processing unit includes at least one of the following: a power supply management module port, an MCU module port, a slave board / high voltage board communication module port, a CAN communication module port, a low-voltage digital / analog signal port, a drive module port, a charging management module port, and a signal connection port. And / or, the high-voltage signal processing unit includes at least one of the following: a power module port, a low-voltage board communication module port, a high-voltage module port, a current module port, an insulation monitoring module port, a drive signal conversion module port, and a signal connection port.

6. A battery cell assembly, characterized in that, include: The battery monitoring unit main control board structure includes: The main control board body (1) includes a first rigid board (11) and a second rigid board (12); A flexible connector (2) is provided, with its two ends connected to the corresponding ends of the first rigid plate (11) and the second rigid plate (12), respectively. The first rigid plate (11) and the second rigid plate (12) are arranged at intervals relative to each other, and the flexible connector (2) is bent. The aspect ratio of the first rigid plate (11) and the second rigid plate (12) is in the range of 1 to 4; The battery unit assembly further includes: a mounting bracket (4) and a second battery energy distribution unit (5). The main control board structure of the battery monitoring unit is fixedly installed through the mounting bracket (4). The mounting bracket (4) is fixedly installed to the second battery energy distribution unit (5). The mounting bracket (4) and the second battery energy distribution unit (5) are connected by fasteners.

7. The battery cell assembly according to claim 6, characterized in that, The main control board structure of the battery monitoring unit also includes a low-voltage signal processing unit, which is disposed on the first rigid board (11). And / or, the main control board structure of the battery monitoring unit further includes a high-voltage signal processing unit, which is disposed on the second rigid board (12).

8. The battery cell assembly according to claim 7, characterized in that, The low-voltage signal processing unit and the high-voltage signal processing unit are electrically connected through the flexible connector (2).

9. The battery cell assembly according to claim 7, characterized in that, The low-voltage signal processing unit includes at least one of the following: a power supply management module port, an MCU module port, a slave board / high voltage board communication module port, a CAN communication module port, a low-voltage digital / analog signal port, a drive module port, a charging management module port, and a signal connection port. And / or, the high-voltage signal processing unit includes at least one of the following: a power module port, a low-voltage board communication module port, a high-voltage module port, a current module port, an insulation monitoring module port, a drive signal conversion module port, and a signal connection port.

10. A vehicle, characterized in that, include: Vehicle body; The battery cell assembly according to any one of claims 1-5 or any one of claims 6-9 is installed on the vehicle body.

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