Collecting device, battery module assembly and vehicle

Abstract

The application relates to a collection device, a battery module assembly and a vehicle. The collection device comprises a signal collection module and a busbar. The signal collection module comprises a collection circuit board and a flexible circuit board. The collection circuit board is provided with a plurality of first pads. The flexible circuit board is provided with a plurality of corresponding second pads and a plurality of metal connecting pieces for collecting signals. The first pads and the second pads are directly welded to realize stable electrical connection between the collection circuit board and the flexible circuit board. The busbar assembly comprises a plurality of busbar units, and each busbar unit is connected with the metal connecting pieces to realize electrical connection between the busbar assembly and the collection module. The application is welded and connected by integrating the flexible circuit board and the collection circuit board, replaces the original wire harness structure, significantly simplifies the internal layout of the battery module, improves the space utilization of the battery pack, greatly reduces the production cost and maintenance cost, and improves the overall production efficiency.

Description

Technical Field

[0001] This application relates to the field of automotive parts technology, and in particular to a data acquisition device, a battery module assembly, and a vehicle. Background Technology

[0002] In related technologies, the data signals collected by the CCS (Cells Contact System) component in square power batteries, such as cell voltage and temperature data, need to be transmitted to the Battery Management System (BMS) through costly adapter harnesses. Furthermore, the internal space of the battery module is limited, making it impossible to arrange a large number of adapter harnesses. Utility Model Content

[0003] To address the above problems, this application provides a data acquisition device, comprising:

[0004] At least one signal acquisition module includes an acquisition circuit board and a flexible circuit board; the acquisition circuit board is provided with a plurality of first pads; the flexible circuit board is provided with a plurality of second pads corresponding to the first pads, and the flexible circuit board is also provided with a plurality of metal connecting pieces for acquiring signals; the first pads and the second pads are soldered to make the acquisition circuit board and the flexible circuit board electrically connected.

[0005] The bus assembly includes multiple bus units, each of which is connected to a metal connector to electrically connect the bus assembly and the acquisition module.

[0006] In one embodiment, the flexible circuit board includes at least a collection branch for setting the metal connecting piece and a common connection portion for connecting the collection circuit board; the second pad is disposed on the common connection portion.

[0007] In one embodiment, the acquisition branch includes a first branch and a second branch spaced apart, the common connection part is located at the same end of the first branch and the second branch, and the two ends of the common connection part are respectively connected to the first branch and the second branch.

[0008] In one embodiment, the metal connecting piece is disposed on the edge of the first branch away from the second branch, and the metal connecting pieces are spaced apart along the extension direction of the first branch; and / or

[0009] The metal connecting piece is disposed on the edge of the second branch away from the first branch, and the metal connecting pieces are arranged at intervals along the extension direction of the second branch.

[0010] In one embodiment, when both the first branch and the second branch are provided with the metal connecting piece, the metal connecting piece on the first branch and the metal connecting piece on the second branch are misaligned in a direction perpendicular to the extension of the first branch or the second branch.

[0011] In one embodiment, each of the busbar units includes a body and pole connection portions extending from the body to both sides, wherein the metal connecting pieces are connected to the upper surface of the body.

[0012] In one embodiment, the main body of the bus unit is provided with a welding area for welding and fixing the metal connecting piece, wherein,

[0013] The welding area is a boss protruding from the upper surface of the body; or

[0014] The welding area is a groove recessed into the upper surface of the body.

[0015] In one embodiment, the acquisition device further includes an electrical isolation plate located between the busbar and the battery module, for forming electrical isolation between the busbar and the battery module;

[0016] The electrical isolation plate has multiple clearance holes, which correspond to the electrode connection portion, so that the electrode connection portion passes through the clearance holes and is electrically connected to the battery module.

[0017] In one embodiment, the acquisition device further includes a mounting bracket, through which the acquisition circuit board is fixed to the busbar and the electrical isolation plate.

[0018] This application also provides a battery module assembly, including;

[0019] Battery module, comprising multiple battery cells;

[0020] The acquisition device mentioned in any of the above embodiments; the bus assembly is electrically connected to the terminal of the battery cell.

[0021] This application also provides a vehicle including the battery module assembly mentioned in any of the above embodiments.

[0022] The technical solutions provided by the embodiments of this application may include the following beneficial effects:

[0023] As described in the above embodiments, the data acquisition device of this application includes a signal acquisition module and a bus. The signal acquisition module includes an acquisition circuit board and a flexible circuit board. The acquisition circuit board has multiple first pads. The flexible circuit board has multiple corresponding second pads and several metal connecting pieces for signal acquisition. By directly soldering the first and second pads, a stable electrical connection between the acquisition circuit board and the flexible circuit board is achieved. The bus assembly includes multiple bus units, each of which is connected to the metal connecting pieces to achieve an electrical connection between the bus assembly and the acquisition module. This application replaces the original wire harness structure with an integrated soldered connection between the flexible circuit board and the acquisition circuit board, significantly simplifying the internal layout of the battery module, improving the space utilization of the battery pack, and at the same time greatly reducing production and maintenance costs, while improving overall production efficiency.

[0024] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this application. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings in the description are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the exploded structure of the acquisition device provided in one embodiment of this application from a certain perspective.

[0027] Figure 2 This is a schematic diagram of the acquisition circuit board provided in one embodiment of this application from a certain perspective.

[0028] Figure 3 This is a schematic diagram of the structure of a flexible circuit board provided in one embodiment of this application from a certain perspective.

[0029] Figure 4 This is a partial structural schematic diagram of a flexible circuit board provided in one embodiment of this application from a certain perspective.

[0030] Figure 5 This is a schematic diagram of the structure of an electrical isolation plate provided in one embodiment of this application from a single perspective.

[0031] Figure 6 This is a schematic diagram of the structure of a bus unit provided in one embodiment of this application from a certain perspective.

[0032] Figure 7 This is a schematic diagram of the signal acquisition module and bus assembly provided in one embodiment of this application from a single viewpoint.

[0033] Figure 8 This is a schematic diagram of another signal acquisition module and bus assembly provided in one embodiment of this application from a single viewpoint.

[0034] Figure label:

[0035] 1. Signal acquisition module; 11. Acquisition circuit board; 110. First pad; 12. Flexible circuit board; 120. Second pad; 121. Metal connecting piece; 122. Acquisition branch; 1220. First branch; 1221. Second branch; 123. Common connection part.

[0036] 2. Busbar assembly; 20. Busbar unit; 201. Body; 2010. Welding area; 202. Pole post connection.

[0037] 3. Electrical isolation plate; 30. Clearance hole.

[0038] 4. Fixed bracket. Detailed Implementation

[0039] Exemplary embodiments will now be described in detail, examples of which are illustrated in the accompanying drawings. When the following description relates to the drawings, unless otherwise indicated, the same numbers in different drawings denote the same or similar elements. The manner described in the following exemplary embodiments does not represent all manner consistent with this application. Rather, they are merely examples of apparatuses consistent with some aspects of this application as detailed in the appended claims.

[0040] As described in the background section, during the operation of a power battery, it is necessary to monitor the voltage and temperature information of the battery module in real time to ensure battery safety. In related technologies, the voltage and temperature information of the battery cell needs to be connected to the busbar via nickel strips on a flexible printed circuit board (FPC), and then the FPC is connected to the sampling circuit board via an external transmission harness to achieve signal transmission.

[0041] Currently, data transmission between the FPC and the sampling circuit board often uses wire harnesses. Due to the large number of voltage and temperature sampling points, this results in cluttered external wire harnesses and difficult assembly. Furthermore, the limited internal space of the battery pack necessitates close proximity or interference between the transmission harnesses and other components to achieve inter-component connections. Additionally, external transmission harness solutions also present challenges in troubleshooting and maintenance costs.

[0042] Based on this, this application provides a data acquisition device applied to a battery module for real-time acquisition of voltage and temperature signals of the battery cells. (Refer to...) Figure 1 The acquisition device includes at least one signal acquisition module 1 and a bus assembly 2.

[0043] Combined with reference Figure 2 , Figure 3 and Figure 8 The signal acquisition module 1 includes an acquisition circuit board 11 and a flexible circuit board 12. The acquisition circuit board 11 is provided with a plurality of first pads 110. The flexible circuit board 12 is provided with a plurality of second pads 120 corresponding to the first pads 110. The first pads 110 and the second pads 120 are soldered together to make the acquisition circuit board 11 and the flexible circuit board 12 electrically connected.

[0044] Specifically, the flexible circuit board 12 is used to carry voltage and temperature signal wires.

[0045] Furthermore, the second pad 120 provided on the flexible circuit board 12 can be specifically understood as follows: the flexible circuit board 12 itself is composed of a flexible insulating substrate (such as polyimide) and copper foil circuitry (and voltage and temperature signal wires) covering it. At the end of the flexible circuit board 12 that needs to be connected to the acquisition circuit board 11, the copper foil circuitry is designed as exposed metal contacts with a certain shape and area; these contacts are the second pad 120.

[0046] Specifically, the acquisition circuit board 11 is usually a PCB board, which integrates signal conditioning, analog-to-digital conversion and other chips, and is the core of signal processing.

[0047] Furthermore, the fact that the acquisition circuit board 11 has first pads 110 can be understood as the acquisition circuit board 11 being a rigid circuit board. On its edge or at a specific location, a row of first pads 110 is designed to correspond one-to-one with the second pads 120 and match their size.

[0048] The specific process for soldering the first pad 110 and the second pad 120 is as follows: First, the end of the flexible circuit board 12 is precisely placed on the acquisition circuit board 11, ensuring that each second pad 120 on the flexible circuit board 12 is aligned with the corresponding first pad 110 on the acquisition circuit board 11, which is coated with solder paste. Second, the soldering of the first pad 110 and the second pad 120 is completed through processes such as reflow soldering or thermoforming. Reflow soldering refers to the entire signal acquisition module passing through a reflow oven, where the high temperature melts the solder paste. After cooling, the molten solder firmly solders the second pad 120 of the flexible circuit board 12 and the first pad 110 of the acquisition circuit board 11 together. Thermoforming refers to using a dedicated heating head to simultaneously provide heat and pressure, pressing the second pad 120 of the flexible circuit board 12 onto the acquisition circuit board 11 to achieve the connection.

[0049] This application provides a row of standard first pads 110 at the end of the acquisition circuit board 11, and fabricates the end of the flexible circuit board 12 into a "flexible plug". The "flexible plug" is directly fixed to the first pads 110 of the acquisition circuit board 11 by soldering, thereby achieving direct electrical connection and mechanical fixation without connections or cables. This arrangement significantly simplifies the internal layout of the battery module, improves the space utilization of the battery pack, and substantially reduces production and maintenance costs while increasing overall production efficiency.

[0050] Furthermore, referring to Figure 3 and Figure 7 The flexible circuit board 12 is also provided with several metal connecting pieces 121 for signal acquisition. The metal connecting pieces 121 can be understood as the nickel sheets mentioned above. The bus assembly 2 includes multiple bus units 20, each bus unit 20 is connected to a metal connecting piece 121, thereby realizing the electrical connection between the bus assembly 2 and the acquisition module and ensuring reliable signal transmission.

[0051] Specifically, the bus assembly 2 consists of multiple bus units 20 with excellent conductivity (usually made of aluminum or copper). Each bus unit 20 is connected to the terminal of a battery cell to collect a large current and also provides an access point for voltage acquisition. Nickel sheets on the flexible circuit board 12 are fixed to the preset welding positions of the corresponding bus units 20 using efficient processes such as laser welding, thereby establishing a stable and reliable electrical connection path between the bus assembly 2 and the signal acquisition module 1, ensuring low-loss transmission of the acquired signal.

[0052] In one embodiment, refer to Figure 8 The acquisition device of this application adopts a parallel dual-module acquisition architecture, specifically including two signal acquisition modules 1 arranged side by side in space. This layout is suitable for long or large battery modules, and can achieve efficient and synchronous acquisition of voltage and temperature signals of multiple battery cells, effectively expanding the sampling coverage and improving system redundancy and reliability.

[0053] Furthermore, each signal acquisition module 1 adopts a "one-to-two" integrated wiring scheme, including an acquisition circuit board 11 (PCB) as the core of signal processing and two symmetrically arranged flexible circuit boards 12 (FPC). The two ends of the acquisition circuit board 11 (i.e., the two far ends in the long axis direction) are respectively directly soldered to a flexible circuit board 12 to achieve a stable electrical connection and mechanical fixation, thereby forming two outwardly extending acquisition branches.

[0054] In some implementations, refer to Figure 3 and Figure 4The flexible circuit board 12 includes at least a collection branch 122 for mounting a metal connecting piece 121, and a common connection portion 123 for connecting the collection circuit board 11. A second pad 120 is disposed on the common connection portion 123.

[0055] Furthermore, the acquisition branch 122 includes a first branch 1220 and a second branch 1221 that are spaced apart, and a common connection part 123 is located at the same end of the first branch 1220 and the second branch 1221, and the two ends of the common connection part 123 are respectively connected to the first branch 1220 and the second branch 1221.

[0056] It is understood that the flexible circuit board 12 adopts a forked integrated layout, and its structure mainly includes a common connection part 123 and at least two acquisition branches 122 extending from the common connection part 123, namely the first branch 1220 and the second branch 1221. It can also be understood that the flexible circuit board 12 has a U-shaped structure.

[0057] The common connection portion 123 is a functional area in the flexible circuit board 12 that connects to the acquisition circuit board 11, and its surface is provided with a plurality of second pads 120. These second pads 120 correspond precisely to the first pads 110 on the acquisition circuit board 11 in terms of position, number and spacing. A stable electrical interconnection and mechanical fixation between the two are achieved through reflow soldering or thermoforming processes, thereby forming a direct connection interface without connectors or wires. For details, please refer to the above embodiment, which will not be repeated here.

[0058] The acquisition branch 122 extends from the common connection part 123. Each acquisition branch 122 is provided with a metal connecting piece 121 (such as a nickel sheet) for connecting to the corresponding bus unit in the battery module by means of laser welding or other methods to realize the acquisition of voltage and temperature signals. Multiple acquisition branches 122 can be arranged facing different directions of the bus or battery cell to realize the signal collection function of a single flexible circuit board 12 for multiple dispersed sampling points.

[0059] It should be noted that the acquisition branch 122 described in this embodiment is a branch structure relative to the common connection portion 123 of the flexible circuit board 12 itself, emphasizing the branched circuit layout on the FPC body 201; while the acquisition branch mentioned in other embodiments is relative to the acquisition circuit board 11, considering the entire FPC as a branch extending from the acquisition circuit board 11. The two refer to different structural levels and objects, and this embodiment focuses more on describing the functional partitions inside the FPC.

[0060] In this embodiment, the branched structure of the flexible circuit board 12 enables a high-density layout and spatial expansion of sampling points, significantly improving the acquisition coverage of a single FPC; the use of connectors and wire harnesses is reduced by integrated wiring, reducing costs and assembly complexity; multiple acquisition branches 122 can be deployed independently, improving adaptability and layout flexibility to complex battery module structures.

[0061] In some implementations, reference continues. Figure 3 A metal connecting piece 121 is provided on the edge of the first branch 1220 away from the second branch 1221, and the metal connecting pieces 121 are arranged at intervals along the extension direction of the first branch 1220.

[0062] Specifically, multiple metal connecting pieces 121 (e.g., made of nickel) are arranged at a preset spacing along the extension direction of the first branch 1220 on its outer edge. This marginal and directional arrangement not only maximizes the use of the FPC area, but also enables it to be precisely aligned and connected to the predetermined welding position of the corresponding first row of bus units 20 in the lower battery module.

[0063] Continue to refer to Figure 3 A metal connecting piece 121 is provided on the edge of the second branch 1221 away from the first branch 1220, and the metal connecting pieces 121 are arranged at intervals along the extension direction of the second branch 1221.

[0064] Similarly, on the second branch 1221, metal connecting pieces 121 are arranged at similar intervals on the edge away from the first branch 1220 and are distributed in an orderly manner along the extension direction of the second branch 1221. This arrangement allows it to accurately correspond to and connect to the adjacent second row of bus units 20 in the battery module.

[0065] This symmetrical and marginalized arrangement makes full use of the edge space of the FPC branches, achieving a high-density layout of acquisition points. Simultaneously, the symmetrical distribution on both sides helps balance wiring tension and structural stability within a confined space, preventing the FPC from warping or being damaged due to uneven stress. Secondly, the clear outward orientation of the metal connector 121 greatly facilitates the positioning and implementation of automated welding processes (such as laser welding), improving production efficiency and the consistency of weld quality. Finally, this regular and predictable arrangement effectively simplifies point location work in later maintenance and fault detection.

[0066] In some implementations, reference continues. Figure 3 When both the first branch 1220 and the second branch 1221 are provided with metal connecting pieces 121, the metal connecting pieces 121 on the first branch 1220 and the metal connecting pieces 121 on the second branch 1221 are misaligned in the direction perpendicular to the extension of the first branch 1220 or the second branch 1221.

[0067] The staggered layout in this embodiment avoids spatial interference. Since the connecting pieces on the two branches do not overlap in projection on the two-dimensional plane, the welding torch head can obtain sufficient and non-interfering operating space when performing laser welding on the corresponding two rows of busbars below. This effectively prevents problems such as welding tool collisions or poor welding angles caused by insufficient space, and greatly improves the smoothness and reliability of automated production.

[0068] Secondly, the staggered arrangement prevents adjacent solder joints from being closely arranged in a straight line, avoiding excessive heat concentration during the welding process. This reduces the risk of damage to the FPC substrate due to local overheating and also facilitates heat dissipation from the busbar itself during the welding process, thus improving the stability of the welding quality.

[0069] Finally, the staggered arrangement enhances the uniformity of mechanical stress distribution. Specifically, the staggered arrangement of the connecting pieces disperses the internal stress generated after welding, preventing stress concentration in a narrow area of ​​the FPC. This reduces the potential risk of warping, delamination, or line breakage due to stress concentration in the FPC, and improves the long-term durability of the entire acquisition device under harsh conditions such as vibration and impact.

[0070] In some implementations, refer to Figure 6 The bus unit 20 adopts a specific one-piece structure to achieve the dual functions of current collection and signal acquisition. Specifically, each bus unit 20 includes a body 201 and pole post connection portions 202 extending from the body 201 to both sides, and a metal connecting piece 121 is connected to the upper surface of the body 201.

[0071] Furthermore, each bus unit 20 mainly includes a body 201 that is generally plate-shaped or strip-shaped, and pole connection portions 202 extending from the body 201 to both sides (or one side).

[0072] The main body 201 serves as the main structure and primary conductive path of the bus unit 20. It is typically made of a metal material with good conductivity (such as aluminum, copper, or their alloys) through processes such as stamping and precision machining. On the upper surface of the main body 201, one or more surface-treated (such as cleaning or nickel plating) welding areas 2010 are provided for achieving a stable electrical and mechanical connection with the metal connecting pieces 121 on the flexible circuit board 12 through methods such as laser welding.

[0073] The electrode connection part 202 is an integrated structure with the body 201, extending outward from the side of the body 201. Its shape and size are configured to precisely match and connect with the electrode (positive or negative) of the battery cell. The electrode connection part 202 is fixed to the battery cell electrode through permanent connection methods such as laser welding, thereby establishing a low-resistance, high-reliability current path and providing a physical connection point for voltage acquisition.

[0074] This design spatially separates the high-current transmission and low-current signal acquisition interfaces while integrating them into a single component: the electrode connection part 202 is responsible for the core duties of high-current transmission and cell connection, while the upper surface of the main body 201 is dedicated to arranging the signal acquisition interface. This clearly defined integrated design ensures both the current-carrying capacity and reliability of the current path, and provides the signal acquisition module 1 with a stable, flat, and easily automated soldering mounting interface.

[0075] In some embodiments, the main body 201 of the bus unit 20 is provided with a welding area 2010 for welding and fixing the metal connecting piece 121.

[0076] Specifically, the welding area 2010 is a specific surface structure formed by local plastic processing (such as precision stamping) of the bus unit 20 body 201 (usually made of aluminum or copper).

[0077] In one embodiment, the welding area 2010 is a boss protruding from the upper surface of the body 201. In another embodiment, refer to... Figure 6 The welding area 2010 is a groove recessed into the upper surface of the body 201.

[0078] Specifically, the boss structure raises the welding plane, making it higher than the surface of the surrounding body 201, thereby effectively isolating the heat-affected zone during the welding process, reducing the thermal impact on the surrounding area, and providing physical guidance and reference for the positioning of the welding torch head, which is conducive to improving welding accuracy and consistency.

[0079] The groove structure forms a localized containment space by recessing the welding plane. This not only helps to contain any metal spatter that may be generated during the welding process and keep the surrounding area clean, but also limits the metal connecting piece 121 to a certain extent, preventing it from sliding during the welding process and ensuring the accuracy of the connection position.

[0080] In some embodiments, the acquisition device further includes an electrical isolation plate 3 and a fixing bracket 4 to improve the electrical safety, structural integrity and assembly reliability of the system.

[0081] An electrical isolation plate 3 is located between the bus assembly 2 and the battery module (not shown in the figure) to form electrical isolation between the bus assembly 2 and the battery module. (Refer to...) Figure 5 The electrical isolation plate 3 has multiple clearance holes 30, which correspond to the terminal connection part 202 so that the terminal connection part 202 passes through the clearance holes 30 and is electrically connected to the battery module.

[0082] The electrical isolation plate 3 is injection molded from engineering plastics (such as flame-retardant PPO, PC / ABS, etc.) with high insulation strength, high CTI (relative tracking index), and flame-retardant properties. This plate is precisely installed between the bus assembly 2 and the battery module housing. Its core function is to form a reliable electrical isolation barrier, preventing high voltage on the bus from being accidentally conducted to the metal housing of the battery module, thereby effectively avoiding short-circuit risks and meeting stringent safety standards. Multiple sets of clearance holes 30 are precisely formed on the electrical isolation plate 3. These clearance holes 30 correspond one-to-one in position and geometry to the terminal connection portions 202 of the bus unit 20. Their core function is to provide a precise physical channel, allowing the terminal connection portions 202 of the bus unit 20 to pass through the isolation plate without damage, and then weld to the cell terminals in the battery module below. Furthermore, the periphery of the clearance holes 30 is often designed with shallow grooves or raised ribs, which not only enhances local insulation distances (creepage distance and electrical clearance) but also plays a preliminary guiding and positioning role during assembly.

[0083] The mounting bracket 4 is typically made of materials with appropriate mechanical strength and insulation properties (such as PBT, nylon with glass fiber), and its function is to ensure the stable installation of the data acquisition circuit board 11 in a predetermined position. The bracket is mechanically connected to the electrical isolation plate 3 through snap-fit, screw, or guide post connections, thus forming an integral support frame. The data acquisition circuit board 11 is fixed to the bracket by screw fastening or snap-fit, and is ultimately reliably clamped and positioned within the predetermined space between the busbar and the electrical isolation plate 3. This design ensures the positional stability of the data acquisition circuit board 11 and its precision electronic components under harsh conditions such as vibration and impact, while avoiding damage to solder joints or components caused by direct mechanical stress.

[0084] This integrated installation solution achieves a compact, stable, and safe arrangement of sampling components within a limited space through a collaborative design of electrical isolation and mechanical fixation, significantly improving the automation level of battery module production, long-term operational reliability, and ease of maintenance.

[0085] This application also provides a battery module assembly, the system including a battery module and a data acquisition device as described in any of the foregoing embodiments.

[0086] The battery module is composed of multiple cells connected in series, parallel, or mixed configurations, with each cell having positive and negative terminals. The busbar assembly 2 of the acquisition device achieves a robust and low-impedance electrical connection with the corresponding cell terminals via laser welding or other methods through the terminal connection 202 of its busbar unit 20, thus constructing a complete electrical circuit. Simultaneously, the signal acquisition module 1 (including FPC and PCB) integrated into the acquisition device, connected to the body 201 of the busbar unit 20 via its metal connector 121, continuously and in real-time acquires the voltage and temperature signals of all cells in the battery module. This critical data is then transmitted to the battery management system (BMS) via a communication interface, providing an accurate data foundation for battery state estimation, equalization management, thermal management, and fault diagnosis.

[0087] Furthermore, this application also provides a vehicle that includes the aforementioned battery module assembly. This battery module assembly, serving as the vehicle's power source or energy storage unit, is typically located in the vehicle chassis. Its integrated data acquisition device is responsible for comprehensive monitoring of the power battery. The collected battery data is sent to the vehicle's main controller or a dedicated BMS controller to ensure the power battery operates safely, reliably, and efficiently throughout its entire lifespan, ultimately providing energy for the vehicle's drive motor, air conditioning system, and other auxiliary electrical equipment.

[0088] The terms "first," "second," and similar terms used in this application and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms "an" or "a" do not indicate a quantity limitation, but rather indicate the presence of at least one, unless otherwise specified. "A plurality" or "several" indicates two or more. The term "and / or" as used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0089] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

Claims

1. A data acquisition device applied to a battery module, characterized in that, include: At least one signal acquisition module includes an acquisition circuit board and a flexible circuit board; the acquisition circuit board is provided with a plurality of first pads; the flexible circuit board is provided with a plurality of second pads corresponding to the first pads, and the flexible circuit board is also provided with a plurality of metal connecting pieces for acquiring signals; the first pads and the second pads are soldered to make the acquisition circuit board and the flexible circuit board electrically connected. The bus assembly includes multiple bus units, each of which is connected to a metal connector to electrically connect the bus assembly and the acquisition module.

2. The data acquisition device according to claim 1, characterized in that, The flexible circuit board includes at least one acquisition branch for setting the metal connecting piece, and a common connection portion for connecting the acquisition circuit board; the second pad is disposed on the common connection portion.

3. The data acquisition device according to claim 2, characterized in that, The acquisition branch includes a first branch and a second branch set at intervals. The common connection part is located at the same end of the first branch and the second branch, and the two ends of the common connection part are respectively connected to the first branch and the second branch.

4. The data acquisition device according to claim 3, characterized in that, The metal connecting piece is disposed on the edge of the first branch away from the second branch, and the metal connecting pieces are spaced apart along the extension direction of the first branch; and / or The metal connecting piece is disposed on the edge of the second branch away from the first branch, and the metal connecting pieces are arranged at intervals along the extension direction of the second branch.

5. The data acquisition device according to claim 4, characterized in that, When both the first branch and the second branch are provided with the metal connecting piece, the metal connecting piece on the first branch and the metal connecting piece on the second branch are misaligned in a direction perpendicular to the extension of the first branch or the second branch.

6. The data acquisition device according to any one of claims 1-5, characterized in that, Each of the aforementioned combiner units includes a body and pole connecting portions extending from the body to both sides, wherein the metal connecting pieces are connected to the upper surface of the body.

7. The data acquisition device according to claim 6, characterized in that, The main body of the bus unit is provided with a welding area for welding and fixing the metal connecting piece, wherein, The welding area is a boss protruding from the upper surface of the body; or The welding area is a groove recessed into the upper surface of the body.

8. The data acquisition device according to claim 6, characterized in that, The data acquisition device also includes an electrical isolation plate, which is located between the busbar and the battery module to form electrical isolation between the busbar and the battery module; The electrical isolation plate has multiple clearance holes, which correspond to the electrode connection portion, so that the electrode connection portion passes through the clearance holes and is electrically connected to the battery module.

9. The data acquisition device according to claim 8, characterized in that, The acquisition device also includes a fixing bracket, and the acquisition circuit board is fixed to the bus and the electrical isolation board by the fixing bracket.

10. A battery module assembly, characterized in that, include; Battery module, comprising multiple battery cells; The data acquisition device as described in any one of claims 1-9; the bus assembly is electrically connected to the terminal of the battery cell.

11. A vehicle, characterized in that, Includes the battery module assembly as described in claim 10.

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