Voltage acquisition integrated device and battery module

Abstract

The utility model discloses a voltage acquisition integrated device and a battery module, the voltage acquisition integrated device comprises a BMS board, and the BMS board is arranged along a first direction; the support is arranged on one side of the BMS board in the second direction and extends away from the BMS board, and the first direction intersects with the second direction; the busbar is arranged on the bracket and is electrically connected with the single batteries; the two ends of the FPC assembly are connected with the BMS board and the busbar respectively, and the orthographic projection of the busbar is located on one side of the orthographic projection of the BMS board. Therefore, no extra occupied space is increased in the horizontal direction or the height direction, so that the occupied space of the voltage acquisition integrated device is relatively small. Moreover, no matter where the FPC assembly is connected with any position of the BMS board and any position of the busbar, the FPC assembly does not have the situation of large-amplitude bending such as 180-degree folding, the processing procedure is simplified, the deformation of the FPC assembly is small when the FPC assembly is impacted, and the connection stability of the FPC assembly with the BMS board and the busbar is improved.

Description

Technical Field

[0001] This application relates to the field of battery technology, and in particular to a voltage acquisition integrated device and a battery module. Background Technology

[0002] With economic development and technological advancements, power batteries are widely used in industries such as electric vehicles. To ensure that power batteries operate within a specified voltage range, it is necessary to collect voltage signals from each battery cell in the battery module. Common voltage acquisition integration devices connect to the BMS (Battery Management System) via wiring harnesses or connectors to collect the voltage signals from the battery cells. However, wiring harness connections are complex, involve cumbersome processing and assembly procedures, and have a high space occupancy rate. Connector connections are mostly one-time connections and have poor stability, with the risk of connector detachment or failure during use, and are also costly.

[0003] To address this issue, existing voltage acquisition integration devices solder flexible circuit boards (FPCBs) to both the connector bus and the BMS board, eliminating the need for connectors on the FPCBs and additional wiring harnesses between them. This not only reduces traditional wiring harness connections, resolving the wiring problem of voltage acquisition integration devices and saving space, but also simplifies the structure, streamlines the manufacturing process, and facilitates production. Furthermore, compared to connector connections, it improves stability, reduces production costs, and thus enhances production efficiency and product competitiveness.

[0004] However, the BMS board, flexible circuit board, and connecting strip of the aforementioned voltage acquisition integrated device are arranged sequentially from top to bottom, occupying a large space in terms of height. Furthermore, in order to connect the BMS board and the connecting strip, the flexible circuit board is subjected to significant bending, which not only makes the manufacturing process cumbersome but also makes it prone to deformation and damage from impacts in the height direction. Utility Model Content

[0005] To address the aforementioned deficiencies in the prior art, the purpose of this application is to provide a voltage acquisition integrated device and a battery module, which further reduces the space occupied, simplifies the processing steps, and improves connection stability.

[0006] In a first aspect, this application provides a voltage acquisition integrated device, which adopts the following technical solution:

[0007] A voltage acquisition integrated device, comprising:

[0008] BMS board, the BMS board is set along the first direction;

[0009] The bracket is located on one side of the BMS board along the second direction and extends away from the BMS board, with the first direction intersecting the second direction.

[0010] Busbar, which is mounted on a bracket and electrically connected to the individual battery cells;

[0011] The FPC assembly has two ends connected to the BMS board and the busbar, respectively, and the orthographic projection of the busbar is located on one side of the orthographic projection of the BMS board.

[0012] In a preferred embodiment, in the first aspect of this application, the FPC component includes an input terminal and an output terminal, which are electrically connected. The input terminal is soldered to a busbar, and the output terminal is soldered to a BMS board.

[0013] As a preferred embodiment, in the first aspect of this application, the input terminal and the output terminal are connected through the main body, and the main body is provided with a buffer structure along its extension direction.

[0014] In a preferred embodiment, in the first aspect of this application, the main body includes a vertical segment and a horizontal segment connected at one end, the other end of the vertical segment is connected to an input end, the other end of the horizontal segment is connected to an output end, the vertical segment is provided with a vertical buffer structure, and the horizontal segment is provided with a horizontal buffer structure.

[0015] As a preferred embodiment, in the first aspect of this application, the vertical buffer structure includes a horizontal portion and an arc-shaped portion, with at least two horizontal portions spaced apart along the second direction, and the corresponding ends of two adjacent horizontal portions being connected by the arc-shaped portion.

[0016] As a preferred embodiment, in the first aspect of this application, the lateral buffer structure includes an upper convex portion and a lower concave portion, with at least two upper convex portions provided along the extension direction of the lateral segment, and adjacent two upper convex portions connected by a lower concave portion.

[0017] In a preferred embodiment, in the first aspect of this application, a horizontal portion is provided at the end of the horizontal segment near the vertical segment, the horizontal portion is adapted to be correspondingly provided with a horizontal portion, a support portion is provided corresponding to the horizontal portion of the bracket, and the horizontal portion is erected on the support portion.

[0018] In a preferred embodiment, in the first aspect of this application, the top of the bracket is recessed to form a notch, and the notch is provided at the connection between the horizontal segment and the vertical segment.

[0019] In a preferred embodiment, in the first aspect of this application, the bracket has a positioning post protruding from the busbar, and the busbar has a matching positioning hole corresponding to the positioning post, with the positioning post passing through the corresponding positioning hole.

[0020] In a preferred embodiment, in the first aspect of this application, the bus includes a positive bus and a negative bus, both of which are connected to the BMS board via a busbar.

[0021] In a preferred embodiment, in the first aspect of this application, both the positive bus and the negative bus are connected to the busbar through a fixing structure. The fixing structure includes a fixing post and a nut. Both the positive bus and the negative bus are provided with fixing posts. The busbar has through holes adapted to the fixing posts. The fixing posts pass through the corresponding through holes and are locked by the nuts.

[0022] In a preferred embodiment, in the first aspect of this application, a support block extends from the edge of the busbar toward the BMS board, and the support block is fixedly connected to the BMS board.

[0023] As a preferred embodiment, in the first aspect of this application, an insulating element is provided on the individual battery cell, and the insulating element is provided in accordance with the FPC assembly.

[0024] Secondly, this application provides a battery module, which adopts the following technical solution:

[0025] A battery module includes: the aforementioned voltage acquisition integrated device.

[0026] The voltage acquisition integrated device and battery module provided in this application have the following technical advantages:

[0027] The BMS board is positioned along the first direction, and the busbar is positioned along the second direction on one side of the BMS board. This design eliminates the need for additional space in either the horizontal or vertical directions, resulting in a smaller footprint for the voltage acquisition integrated device. Furthermore, the busbar's projection is located to one side of the BMS board's projection. Regardless of the FPC component's connection to the BMS board or the busbar, the FPC component will not experience significant bending, such as a 180° fold. This simplifies the manufacturing process and minimizes deformation of the FPC component under impact, thus improving the stability of the connection between the FPC component, the BMS board, and the busbar. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the battery module structure of this application;

[0029] Figure 2 This is an exploded view of the battery module of this application;

[0030] Figure 3 This is an exploded view of the voltage acquisition integrated device of this application;

[0031] Figure 4 This is an exploded view of the BMS board, bracket, and busbar assembly structure of this application;

[0032] Figure 5 This is a schematic diagram of the structure of the FPC component of this application.

[0033] Figure label:

[0034] 1. BMS board; 2. Bracket; 21. Support part; 22. Notch; 23. Positioning post; 24. Clearance hole; 3. Busbar; 31. Positioning hole; 32. Positive busbar; 33. Negative busbar; 34. Busbar; 341. Through hole; 342. Support block; 4. Individual cell; 41. Insulator; 5. FPC assembly; 51. Input end; 52. Output end; 53. Main body; 531. Vertical section; 5311. Horizontal section; 5312. Arc-shaped section; 532. Lateral section; 5321. Upper convex part; 5322. Lower concave part; 5323. Lateral part; 6. Fixing post; 7. Nut. Detailed Implementation

[0035] To better understand and implement this application, the technical solutions in this application will be clearly and completely described below with reference to the accompanying drawings.

[0036] In the description of this application, it should be noted that the terms "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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. Therefore, they should not be construed as limitations on this application.

[0037] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the specification of this application is for the purpose of describing particular embodiments only and is not intended to be limiting of this application.

[0038] See Figure 1 and Figure 2 This application provides a voltage acquisition integrated device, including a BMS board 1, a bracket 2, a busbar 3, and an FPC assembly 5. The BMS board 1 is disposed along a first direction, the bracket 2 is disposed along a second direction on one side of the BMS board 1 and extends downward relative to the BMS board 1, and the busbar 3 is disposed on the bracket 2 and electrically connected to a single battery cell 4. The two ends of the FPC assembly 5 are respectively connected to the BMS board 1 and the busbar 3, and the orthographic projection of the busbar 3 is located on one side of the orthographic projection of the BMS board 1.

[0039] Among them, the first direction and the second direction are as follows Figure 1As shown. The BMS board 1 is a PCB board, which is a horizontally placed plate-like structure. The bracket 2 is a vertically placed plate-like structure, which is placed on one side of the BMS board 1 and extends downward, so that the bracket 2 is positioned on one side of the individual battery 4, and the BMS board 1 is positioned above the individual battery 4. The bracket 2 has a clearance hole 24 corresponding to the busbar 3. The clearance hole 24 is used for the busbar 3 to electrically connect to the individual battery 4, and the setting of the clearance hole 24 has the function of reducing weight. The bracket 2 is made of plastic, which helps to reduce the overall weight of the voltage acquisition integration device and save costs.

[0040] The number of busbars 3 corresponds to the number of individual cells 4. This application uses a cylindrical cell as an example. Figure 2 As shown, there are four individual battery cells 4. One busbar 3 is used to connect the positive and negative terminals of two adjacent cells, that is, the four individual battery cells 4 are connected in series using the three middle busbars 3. The two busbars 3 at both ends are used to connect to the BMS board 1. On this basis, the three middle busbars 3 are all connected to the BMS board 1 through FPC components 5. One end of the FPC component 5 is connected to the bottom of the BMS board 1, and the other end is connected to the busbar 3 to collect the voltage signal of the individual battery cells 4 and transmit it to the BMS board 1.

[0041] In this application, the BMS board 1 is arranged along a first direction, and the busbar 3 is arranged along a second direction on one side of the BMS board 1. This design avoids adding extra space in either the horizontal or vertical direction, resulting in a smaller footprint for the voltage acquisition integrated device. Furthermore, the orthographic projection of the busbar 3 is located on one side of the orthographic projection of the BMS board 1. Regardless of where the FPC component 5 is connected to the BMS board 1 or the busbar 3, the FPC component 5 will not experience significant bending, such as a 180° fold. This simplifies the manufacturing process and minimizes deformation of the FPC component 5 under impact, thus improving the stability of the connection between the FPC component 5 and the BMS board 1 and the busbar 3.

[0042] See Figure 3 The FPC component 5 includes an input terminal 51 and an output terminal 52, which are electrically connected. The input terminal 51 is soldered to the busbar 3, and the output terminal 52 is soldered to the BMS board 1. The input terminal 51 is used to collect the voltage signal of the individual battery 4, and the output terminal 52 is used to transmit the collected voltage signal to the BMS board 1.

[0043] The input terminal 51 and the output terminal 52 are connected via the main body 53, which has a buffer structure along its extension direction. The input terminal 51, the main body 53, and the output terminal 52 form an integral structure to constitute the FPC assembly 5, thereby enabling the acquisition of voltage signals from individual cells 4 and transmission to the BMS board 1. Since the busbar 3 is located on one side of the BMS board 1 and extends downward, when the FPC assembly 5 is used to connect the BMS board 1 and the busbar 3, the FPC assembly 5 will bend and change its extension direction. The buffer structure improves the flexibility of welding the FPC assembly 5 to the BMS board 1 and the busbar 3, and reduces deformation when subjected to impact.

[0044] See Figure 5 The main body 53 includes a vertical section 531 and a horizontal section 532 connected at one end. The other end of the vertical section 531 is connected to the input end 51, and the other end of the horizontal section 532 is connected to the output end 52. The vertical section 531 is provided with a vertical buffer structure, and the horizontal section 532 is provided with a horizontal buffer structure. The vertical buffer structure improves the flexibility of welding the FPC assembly 5 to the busbar 3 and reduces the deformation of the FPC assembly 5 when subjected to impact in the vertical direction. The horizontal buffer structure improves the flexibility of welding the FPC assembly 5 to the BMS board 1 and reduces the deformation of the FPC assembly 5 when subjected to impact in the horizontal direction.

[0045] Specifically, the vertical buffer structure includes horizontal sections 5311 and arc-shaped sections 5312. At least two horizontal sections 5311 are spaced apart along the second direction, and the corresponding ends of two adjacent horizontal sections 5311 are connected by arc-shaped sections 5312. The number of horizontal sections 5311 is determined by the welding position of the FPC assembly 5 and the busbar 3. When there are three or more horizontal sections 5311, adjacent arc-shaped sections 5312 are staggered, which can improve the stability of the vertical section 531.

[0046] The combination of the horizontal section 5311 and the arc-shaped section 5312 allows the vertical section 531 to be adjusted vertically to buffer the impact in the height direction, thus ensuring a stable connection between the input end 51 and the busbar 3 with minimal deformation.

[0047] The lateral buffer structure includes an upper protrusion 5321 and a lower recess 5322. At least two upper protrusions 5321 are provided along the extension direction of the lateral segment 532, and adjacent upper protrusions 5321 are connected by the lower recess 5322. The arrangement of the upper protrusions 5321 and lower recess 5322 allows the lateral segment 532 to be buffered and adjusted along its extension direction when subjected to impact in the horizontal direction, ensuring a stable connection between the output terminal 52 and the BMS board 1 with minimal deformation.

[0048] Based on this, a horizontal section 5323 is provided at the end of the horizontal section 532 near the vertical section 531. The horizontal section 5323 is adapted to the horizontal section 5311 and is correspondingly provided. The bracket 2 is provided with a support section 21 corresponding to the horizontal section 5323, and the horizontal section 5323 is supported on the support section 21. The support section 21 provides support for the horizontal section 5323 to ensure a stable connection between the horizontal section 532 and the vertical section 531.

[0049] The top of the bracket 2 is recessed to form a notch 22, which is provided at the connection between the horizontal segment 532 and the vertical segment 531. The notch 22 can prevent the bracket 2 from interfering with the connection between the horizontal segment 532 and the vertical segment 531, and further improve the stability of the connection between the horizontal segment 532 and the vertical segment 531.

[0050] Furthermore, an insulating member 41 is provided on the individual battery cell 4, and the insulating member 41 is provided corresponding to the FPC assembly 5. The insulating member 41 covers the side of the individual battery cell 4 and corresponds to the FPC assembly 5, thereby using the insulating member 41 to separate the individual battery cell 4 from the FPC assembly 5 and prevent short circuits from occurring.

[0051] See Figure 4 The bracket 2 has a positioning post 23 protruding from the busbar 3, and the busbar 3 has a corresponding positioning hole 31. The positioning post 23 passes through the corresponding positioning hole 31. The matching connection between the positioning post 23 and the positioning hole 31 makes the busbar 3 stably installed on the bracket 2.

[0052] Busbar 3 includes a positive busbar 32 and a negative busbar 33, both of which are connected to the BMS board 1 via a busbar 34. That is, the electrical connection between the positive and negative busbars 32 and the BMS board 1 is achieved through the busbar 34. The busbar 3, connected in series between the positive and negative busbars 32 and 33, is electrically connected to the BMS board 1 via the FPC assembly 5 to transmit the voltage signal of the individual battery 4 to the BMS board 1.

[0053] Both the positive busbar 32 and the negative busbar 33 are connected to the busbar 34 via a fixing structure. The fixing structure includes a fixing post 6 and a nut 7. Both the positive busbar 32 and the negative busbar 33 are provided with fixing posts 6. The busbar 34 has through holes 341 adapted to the fixing posts 6. The fixing posts 6 pass through the corresponding through holes 341 and are locked by the nuts 7. The fixing posts 6 are fixed on the positive busbar 32 and the negative busbar 33. The fixing posts 6 pass through the busbar 34 and are locked by the nuts 7, so that the busbar 34 is clamped between the nuts 7 and the corresponding positive busbar 32 or negative busbar 33, realizing a stable connection between the busbar 34 and the corresponding positive busbar 32 or negative busbar 33.

[0054] A support block 342 extends from the edge of the busbar 34 toward the BMS board 1, and the support block 342 is fixedly connected to the BMS board 1. On the one hand, the fixed connection between the support block 342 and the BMS board 1 achieves a stable connection between the busbar 34 and the BMS board 1. On the other hand, the support block 342 can support the BMS board 1, so as to ensure the stable installation of the BMS board 1.

[0055] The support block 342 can be plugged in or snapped into the BMS board 1 to ensure the stability of the connection between the support block 342 and the BMS board 1.

[0056] In addition, this application also provides a battery module including the aforementioned voltage acquisition integrated device. The busbar 3 of the voltage acquisition integrated device is located on one side of the BMS board 1, and the FPC assembly 5 for connecting the busbar 3 and the BMS board 1 has a buffer structure. In this way, the space occupied by the battery module is reduced in both the horizontal and vertical directions, and the stability of the internal structural connection of the battery module and its resistance to impact deformation are improved.

[0057] The technical means disclosed in this application are not limited to those disclosed in the above embodiments, but also include technical solutions composed of any combination of the above technical features. It should be noted that those skilled in the art can make several improvements and modifications without departing from the principles of this application, and these improvements and modifications are also considered to be within the scope of protection of this application.

Claims

1. A voltage acquisition integrated device, characterized in that, include: BMS board (1), wherein the BMS board (1) is disposed along a first direction; A bracket (2) is provided on one side of the BMS plate (1) along a second direction and extends away from the BMS plate (1), wherein the first direction intersects the second direction; Busbar (3), the busbar (3) is mounted on the bracket (2) and electrically connected to the individual battery (4); The FPC component (5) is connected to the BMS board (1) and the busbar (3) at both ends, respectively. The orthographic projection of the busbar (3) is located on one side of the orthographic projection of the BMS board (1).

2. The voltage acquisition integrated device according to claim 1, characterized in that: The FPC component (5) includes an input terminal (51) and an output terminal (52), which are electrically connected. The input terminal (51) is welded to the busbar (3), and the output terminal (52) is welded to the BMS board (1).

3. The voltage acquisition integrated device according to claim 2, characterized in that: The input terminal (51) and the output terminal (52) are connected by a main body (53), and the main body (53) is provided with a buffer structure along its extension direction.

4. The voltage acquisition integrated device according to claim 3, characterized in that: The main body (53) includes a vertical section (531) and a horizontal section (532) connected at one end. The other end of the vertical section (531) is connected to the input end (51), and the other end of the horizontal section (532) is connected to the output end (52). The vertical section (531) is provided with a vertical buffer structure, and the horizontal section (532) is provided with a horizontal buffer structure.

5. The voltage acquisition integrated device according to claim 4, characterized in that: The vertical buffer structure includes a horizontal part (5311) and an arc-shaped part (5312). The horizontal part (5311) is provided at least two at intervals along the second direction, and the corresponding ends of two adjacent horizontal parts (5311) are connected through the arc-shaped part (5312).

6. The voltage acquisition integrated device according to claim 4, characterized in that: The transverse buffer structure includes an upper convex portion (5321) and a lower concave portion (5322). At least two upper convex portions (5321) are provided along the extension direction of the transverse segment (532), and adjacent upper convex portions (5321) are connected by the lower concave portion (5322).

7. The voltage acquisition integrated device according to claim 5, characterized in that: The horizontal section (532) has a horizontal part (5323) at the end near the vertical section (531). The horizontal part (5323) is adapted to the horizontal part (5311) and is correspondingly provided. The bracket (2) has a support part (21) corresponding to the horizontal part (5323). The horizontal part (5323) is supported on the support part (21).

8. The voltage acquisition integrated device according to claim 4, characterized in that: The top of the bracket (2) is recessed to form a notch (22), which is provided at the connection between the horizontal segment (532) and the vertical segment (531).

9. The voltage acquisition integrated device according to any one of claims 1-8, characterized in that: The bracket (2) has a positioning post (23) protruding from the busbar (3), and the busbar (3) has a matching positioning hole (31) corresponding to the positioning post (23), and the positioning post (23) passes through the corresponding positioning hole (31).

10. The voltage acquisition integrated device according to any one of claims 1-8, characterized in that: The busbar (3) includes a positive busbar (32) and a negative busbar (33), both of which are connected to the BMS board (1) via a busbar (34).

11. The voltage acquisition integrated device according to claim 10, characterized in that: The positive busbar (32) and the negative busbar (33) are both connected to the busbar (34) through a fixing structure. The fixing structure includes a fixing post (6) and a nut (7). The positive busbar (32) and the negative busbar (33) are both provided with the fixing post (6). The busbar (34) has a through hole (341) adapted to the fixing post (6). The fixing post (6) passes through the corresponding through hole (341) and is locked by the nut (7).

12. The voltage acquisition integrated device according to claim 10, characterized in that: The edge of the busbar (34) extends toward the BMS plate (1) with a support block (342), and the support block (342) is fixedly connected to the BMS plate (1).

13. The voltage acquisition integrated device according to any one of claims 1-8, characterized in that: The single cell (4) is provided with an insulating component (41), which is provided in relation to the FPC assembly (5).

14. A battery module, characterized in that, include: The voltage acquisition integrated device according to any one of claims 1-13.

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