Acquisition assembly, battery module, and battery box

Abstract

Disclosed in the present application are an acquisition assembly, a battery module, and a battery box. The acquisition assembly comprises an insulating support (2), acquisition traces (3), an FPC acquisition board (4) and a connector (5), wherein the FPC acquisition board (4) comprises an FPC acquisition body (41), a connection portion (42) and a redundancy portion (43), the FPC acquisition body (41) being fixedly connected to the tops of expansion beams; the ends of the acquisition traces (3) are connected to the FPC acquisition body (41); the connection portion (42) is connected to the connector (5); two ends of the redundancy portion (43) are connected to the FPC acquisition body (41) and the connection portion (42), respectively; and the connector (5) is connected to a BMS slave board.

Description

Acquisition components, battery modules and battery boxes

[0001] This application claims priority to the Chinese patent application filed with the China Patent Office on August 1, 2024, with application number 202421858169.6. The entire contents of the above application are incorporated by reference into this application.

[0002] Technical Field

[0003] The present application relates to the field of battery technology, for example, to acquisition components, battery modules and battery boxes.

[0004] Background Art

[0005] The Cells Contact System (CCS) is an integrated battery signal acquisition (for example, temperature acquisition, pressure acquisition, current acquisition, etc.) and management system. The CCS mainly consists of a plastic bracket, acquisition components and a conductive bus (aluminum bus).

[0006] The CCS, which uses a flexible flat cable (FFC) as the acquisition line, mainly includes a printed circuit board (PCB) acquisition board, FFC acquisition lines, and connectors. The connector and FFC acquisition lines are welded on the PCB acquisition board. The FFC acquisition lines are connected to the connector, and the connector is connected to the battery management system (BMS) slave board by direct plug-in.

[0007] Technical issues

[0008] This form of CCS has the following defects: the PCB acquisition board at the front end of the CCS needs to be soldered with connectors and acquisition traces, which will cause the size of the PCB acquisition board to be larger. It is easy to generate a large amplitude during the vibration process, thereby causing stress concentration on the connector pins soldered on the PCB acquisition board, and there is a risk of pin breakage and thus acquisition failure.

[0009] Technical Solutions

[0010] The present application provides an acquisition component that can prevent the CCS acquisition board from vibrating, causing the welding pins between the connector and the acquisition board to break and thus causing acquisition failure.

[0011] A collection component is applied to a battery module, wherein the battery module is arranged in a battery box, wherein a plurality of expansion beams arranged at intervals are provided in the battery box, and a space configured to accommodate the battery module is formed between two adjacent expansion beams, and a BMS slave board is fixedly provided on the side of the expansion beam. The collection component includes: an insulating bracket; a collection trace, wherein the collection trace is installed on the insulating bracket; a flexible printed circuit (FPC) collection board and a connector, wherein the FPC collection board includes an FPC collection body, a connecting part and a redundant part, wherein the FPC collection body is fixedly connected to the top of the expansion beam, an end of the collection trace is electrically connected to the FPC collection body, the connecting part is connected to the connector, and both ends of the redundant part are respectively connected to the FPC collection body and the connecting part, and the connector is connected to the BMS slave board.

[0012] The present application provides a battery module, which can improve the performance and stability of the entire battery module by using the above-mentioned collection component.

[0013] The battery module comprises a battery cell and the above-mentioned collection component, wherein the collection component is electrically connected to the battery cell.

[0014] The present application provides a battery box, which, by using the above-mentioned battery module, can extend the service life of the battery box, reduce the number of maintenance times, and save maintenance costs.

[0015] The battery box includes a box body and the above-mentioned battery module. A plurality of expansion beams are arranged at intervals in the box body, and a space is formed between two adjacent expansion beams to accommodate the battery module. A BMS slave board is fixed to the side of the expansion beam. The collection component in the battery module includes an FPC collection board, which is fixed to the top of the expansion beam. The connector on the collection component is connected to the BMS slave board.

[0016] Beneficial effects

[0017] The beneficial effects of the acquisition component provided by the present application are as follows: by fixing the FPC acquisition body on the expansion beam of the box, the installation stability of the FPC acquisition board can be effectively improved, and the concentrated stress on the connector pins on the FPC acquisition main board is eliminated, thereby ensuring that the connector pins on the FPC acquisition main board will not break, and the connection method is convenient and fast. In addition, the acquisition board made of FPC material has the characteristics of being soft, light, thin, and flexible, so that the acquisition board has a deformable function. When the expansion beam is bent and deformed by the expansion force of the battery cell, the redundant part in the FPC acquisition board can be deformed to absorb the deformation of the expansion beam, so that the relative distance between the connector welded on the expansion beam and the BMS slave board will not change, preventing the two from relative displacement, thus avoiding the connection failure between the connector and the BMS slave board, thereby preventing acquisition failure.

[0018] The beneficial effects of the battery module provided by the present application are as follows: since the battery module includes the above-mentioned collection component, and the above-mentioned collection component has an FPC collection board fixedly connected to the expansion beam on the battery box body, it not only ensures the installation stability of the FPC collection board and prevents the connector pins on the FPC collection body from breaking, but also when the expansion beam is deformed, the redundant part in the FPC collection board can absorb the deformation, thereby maintaining the relative distance between the connector and the BMS slave board unchanged, making the connection between the connector and the BMS slave board stable, thereby ensuring the effective collection of the BMS slave board, and improving the performance and stability of the entire battery module.

[0019] The battery box provided by the present application has the following beneficial effects: the space for placing the battery module is defined by expansion beams arranged at intervals in the box body, and the FPC acquisition board in the battery module is fixedly connected to the expansion beams. By replacing the PCB hard board with the FPC acquisition board and fixing the FPC acquisition board to the expansion beams, on the one hand, the vibration of the FPC acquisition board can be effectively reduced, and the risk of the connector pins on the FPC acquisition body being broken due to concentrated stress is reduced; on the other hand, when the expansion beam is deformed, the redundant part on the FPC acquisition board can absorb the deformation generated by the expansion beam, thereby ensuring the stability of the relative distance between the BMS slave board and the connector, and further ensuring the stable and reliable connection between the connector and the BMS slave board, thereby extending the service life of the battery box, reducing the number of maintenance times, and saving maintenance costs.

[0020] BRIEF DESCRIPTION OF THE DRAWINGS

[0021] FIG1 is a schematic structural diagram of a collection component provided in an embodiment of the present application;

[0022] FIG2 is a front view of a partial structure of a collection assembly provided in an embodiment of the present application;

[0023] FIG3 is a partial enlarged view of point A in FIG1 ;

[0024] FIG4 is a top view of the structure of two collection components provided by an embodiment of the present application when they are switched and connected;

[0025] FIG5 is a partial enlarged view of point B in FIG4.

[0026] In the picture:

[0027] 100, BMS slave board;

[0028] 10. Collection component;

[0029] 1. Busbar;

[0030] 2. Insulation bracket;

[0031] 3. Collection routing; 31. Routing body; 32. Bend section; 321. First bend; 322. Second bend;

[0032] 4. FPC acquisition board; 41. FPC acquisition body; 411. Collector; 412. Acquisition socket; 42. Connector; 43. Redundant part;

[0033] 5. Connector.

[0034] Modes for Carrying Out the Invention

[0035] The present application is described below with reference to the accompanying drawings and embodiments. The specific embodiments described herein are intended to explain the present application, not to limit the present application. It should also be noted that, for ease of description, the accompanying drawings show only some, but not all, structures related to the present application.

[0036] In the description of this application, unless otherwise specified or limited, the terms "connected," "connect," and "fixed" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and can refer to internal communication between two components or interaction between two components. A person of ordinary skill in the art will be able to understand the meaning of the above terms in this application according to the circumstances.

[0037] In this application, unless otherwise expressly specified or limited, a first feature being "above" or "below" a second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in contact with the second feature through another feature between them instead of being in direct contact. Moreover, a first feature being "above," "above," and "above" a second feature may include the first feature being directly above or obliquely above the second feature, or may indicate that the first feature is at a higher level than the second feature. A first feature being "below," "below," and "below" a second feature may include the first feature being directly below or obliquely below the second feature, or may indicate that the first feature is at a lower level than the second feature.

[0038] In the description of this embodiment, the terms "upper," "lower," "right," and other orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely for ease of description and simplified operation. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and do not have any special meanings.

[0039] The following describes the acquisition component, battery module and battery box provided by the present application in conjunction with the accompanying drawings and specific implementation methods.

[0040] In the related art, a battery box includes a box body and a battery module. To accommodate the expansion of the ends of the battery module, a plurality of expansion beams are arranged at intervals within the box body. A space capable of accommodating the battery module is formed between two adjacent expansion beams. The larger surface area of ​​the expansion beam is arranged relative to the large surface of the battery module, so that the expansion beam can withstand the expansion force of the battery module along its end direction (i.e., normal to the large surface of the battery module), thereby reducing the deformation of the battery module along its end direction. In addition, a BMS slave board 100 is fixedly mounted on the larger surface area of ​​the expansion beam. The battery module includes a battery cell and a data acquisition component 10. The battery cell is electrically connected to the data acquisition component 10. The BMS slave board 100 is electrically connected to the data acquisition component 10 to monitor and collect signals such as the voltage, temperature, and current of the battery cell.

[0041] As shown in Figure 1, the data acquisition assembly 10 includes a busbar 1, an insulating bracket 2, data acquisition traces 3, a data acquisition board, and a connector 5. The busbar 1 is mounted on the insulating bracket 2, which is configured to insulate the busbar 1 and any portions of the output stage not electrically connected to the battery cells from the battery cells. The insulating bracket 2 can be made of polycarbonate (PC), PC + acrylonitrile-butadiene-styrene copolymer (ABS), epoxy, or other materials, though this application is not limited thereto. The data acquisition trace 3 is mounted on the insulating bracket 2, one end of which is electrically connected to the busbar 1 and the other end to the data acquisition board, thereby transmitting the collected signals, such as the battery cell voltage, temperature, and current, to the FPC data acquisition board 4. The data acquisition board is typically made of a rigid PCB, with the connector 5 and data acquisition trace 3 soldered to the PCB. The connector 5 is connected to the BMS slave board 100 to transmit the signals from the battery cells to the BMS.

[0042] However, because the PCB hard board needs to be soldered with connectors 5 and acquisition traces 3, the size of the PCB hard board is usually large, and it is easy to generate a large amplitude during the vibration process, causing stress concentration on the pins of the connector 5 soldered on the PCB hard board, and there is a risk of pin breakage and thus acquisition failure.

[0043] In this embodiment, the acquisition board adopts an FPC acquisition board 4. As shown in Figures 1 and 2, the FPC acquisition board 4 includes an FPC acquisition body 41, a connecting part 42 and a redundant part 43. The FPC acquisition body 41 is fixedly connected to the top of the expansion beam, the end of the acquisition trace 3 is welded and electrically connected to the FPC acquisition body 41, the connecting part 42 is connected to the connector 5, and the two ends of the redundant part 43 are respectively connected to the FPC acquisition body 41 and the connecting part 42.

[0044] In the above setting, the FPC acquisition body 41 is fixed on the expansion beam of the box body. Since the expansion beam is mostly fixed on the box body, the expansion beam can play a buffering role when it is subjected to vibration or impact, reducing the interference of external forces on the FPC acquisition body 41, thereby suppressing the FPC acquisition body 41 from generating a large amplitude, effectively improving the installation stability of the FPC acquisition body 41, and eliminating the concentrated stress of the FPC acquisition body 41 on the connector 5 pins, thereby ensuring that the connector 5 pins on the FPC acquisition main board will not break, and this connection method is convenient and fast.

[0045] In this embodiment, the redundant portion 43, the connecting portion 42, and the FPC acquisition body 41 are integrally formed, all made of FPC. The acquisition board made of FPC is soft, thin, and flexible, which enables the redundant portion 43 to be deformable. When the expansion beam is bent and deformed by the force of battery cell expansion, the expansion beam simultaneously moves forward with the BMS slave board 100, the connector 5, and the connecting portion 42. At this time, the redundant portion 43 can deform to absorb the deformation of the expansion beam, ensuring that the relative distance between the connector 5 welded to the expansion beam and the BMS slave board 100 does not change, thereby preventing relative displacement between the two, thus avoiding failure of the connection between the connector 5 and the BMS slave board 100, and thus preventing acquisition failure.

[0046] The connecting portion 42 is provided with a piercing terminal, which is connected to the connector 5 so that the FPC acquisition board 4 can be directly inserted into the plastic shell of the connector 5 for acquisition connection, eliminating the step of welding the connector 5 and the FPC acquisition body 41, thereby simplifying the process and reducing production costs.

[0047] Collection trace 3 is an FFC circuit. FFC circuits offer advantages such as good flexibility and thinness, a relatively simple structure, and lower mold costs compared to FPC circuits, thus offering cost advantages. Of course, in other embodiments, collection trace 3 can also be a flexible die-cutting circuit (FDC) circuit. Compared to FPC circuits, FDC circuits require fewer processing steps, a shorter processing cycle, and higher efficiency, effectively saving processing costs. Therefore, both FFC and FDC circuits fall within the scope of protection of this application.

[0048] As shown in Figure 3, the FFC line includes a wiring body 31 and a bending section 32, wherein the wiring body 31 is installed on the insulating bracket 2, the bending section 32 is located at the end of the wiring body 31, and the bending section 32 is electrically connected to the FPC acquisition board 4. The side of the wiring body 31 can also be connected to a negative temperature coefficient (NTC) component through thermal conductive structural adhesive, soldering, etc. to collect temperature information at the battery cell pole; the bending section 32 includes a first bending portion 321 and a second bending portion 322, wherein one end of the first bending portion 321 is connected to the end of the wiring body 31, and the other end of the first bending portion 321 is connected to one end of the second bending portion 322, and the larger area side surface of the first bending portion 321 is in contact with the end surface of the insulating bracket 2, and the other end of the second bending portion 322 is tightly attached to the FPC acquisition body 41 and fixedly connected to the FPC acquisition body 41. Through the above arrangement, the first bend portion 321 in the collection trace 3 can absorb the displacement of the FPC collection body 41 when the battery cell expands, thereby ensuring the connection stability between the second bend portion 322 and the connector 5 .

[0049] In this embodiment, the FPC collecting body 41 is fixedly connected to the second bent portion 322 by hotbar welding, which provides high connection strength and efficiency, effectively saving time and labor costs. Of course, in other embodiments, the FPC collecting body 41 can also be fixed to the second bent portion 322 by laser welding, ultrasonic welding, resistance welding, etc., and this application is not limited to this.

[0050] A glue layer is sandwiched between the FPC collecting body 41 and the top of the expansion beam. For example, foam glue can be used to directly bond the FPC collecting body 41 to the top of the expansion beam, thereby eliminating the welding step between the two and improving production efficiency.

[0051] In this embodiment, as shown in Figures 4 and 5, taking the battery box as an example, two battery modules are provided in the battery box. One end of the FPC collection body 41 in one collection component 10 is provided with a collector 411, and one end of the FPC collection body in the other collection component 10 is provided with a collection socket 412. The collector 411 can be plugged into the collection socket 412. When the BMS slave board 100 in one battery module needs to collect the working information of the battery cells in another battery module, the collector 411 is directly inserted into the collection socket 412 to achieve communication connection between the two battery modules. If a PCB hard board is used as the collection board and the collector 411 is set on the PCB hard board, due to the high hardness and poor toughness of the PCB hard board, an FFC line is required as a transfer bridge to connect the two PCB hard boards. At this time, two more soldering steps will be required on each PCB hard board to solder the FFC line to the PCB hard board.

[0052] Therefore, by replacing the PCB hard board with the FPC acquisition board 4, another benefit is that it can reduce the difficulty of the acquisition definition transfer of two adjacent battery modules, significantly reduce the number of welding times, make the process flow simpler, and reduce the process requirements.

[0053] When a battery box contains more battery modules, the FPC collection body 41 can be provided with both a collector 411 and a collection socket 412 to facilitate plugging and mating with the FPC collection body 41 of the adjacent collection assembly 10. Therefore, this application does not limit whether the FPC collection body 41 is provided with both a collector 411 and a collection socket 412. The following three configurations, namely, providing only one collector 411 on the FPC collection body 41, providing only one collection socket 412 on the FPC collection body 41, and providing both a collector 411 and a collection socket 412 on the FPC collection body 41, are all within the scope of protection of this application.

[0054] This embodiment also provides a battery module, which includes a battery cell and the aforementioned collection assembly 10. The insulating bracket 2 is provided with a through-hole coaxially arranged with the battery cell pole, and the busbar 1 on the collection assembly 10 is electrically connected to the battery cell pole through the through-hole. Because the battery module includes the aforementioned collection assembly 10, and the collection assembly 10 has an FPC collection board 4 fixedly connected to the expansion beam on the battery box body, not only does it ensure the installation stability of the FPC collection board 4 and prevent the pins of the connector 5 on the FPC collection body 41 from breaking, but when the expansion beam deforms, the redundant portion 43 in the FPC collection board 4 can absorb the deformation, thereby maintaining the relative distance between the connector 5 and the BMS slave board 100 unchanged, ensuring a stable connection between the connector 5 and the BMS slave board 100, thereby ensuring effective collection of the BMS slave board 100 and improving the performance and stability of the entire battery module.

[0055] This embodiment also provides a battery box, including a box body and the above-mentioned battery module. The box body defines a space for placing the battery module by expansion beams arranged at intervals, and the FPC acquisition board 4 in the battery module is fixedly connected to the expansion beams. By replacing the PCB hard board with the FPC acquisition board 4 and fixing the FPC acquisition board 4 to the expansion beams, on the one hand, the vibration of the FPC acquisition board 4 can be effectively reduced, and the risk of the connector 5 pins on the FPC acquisition body 41 being broken due to concentrated stress is reduced. On the other hand, when the expansion beam is deformed, the redundant portion 43 on the FPC acquisition board 4 can absorb the deformation generated by the expansion beam, thereby ensuring the stability of the relative distance between the BMS slave board 100 and the connector 5, and further ensuring the stable and reliable connection between the connector 5 and the BMS slave board 100, thereby extending the service life of the battery box, reducing the number of maintenance times, and saving maintenance costs.

[0056] Throughout this specification, references to terms such as "some embodiments" and "other embodiments" indicate that the features, structures, materials, or characteristics described in conjunction with such embodiments or examples are included in at least one embodiment or example of the present application. In this specification, schematic representations of such terms do not necessarily refer to the same embodiment or example. Furthermore, the described features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

Claims

1. A collection component, applied to a battery module, wherein the battery module is arranged in a battery box, wherein a plurality of expansion beams arranged at intervals are arranged in the battery box, and a space configured to accommodate the battery module is formed between two adjacent expansion beams, and a battery management system BMS slave board (100) is fixedly arranged on the side of the expansion beam, wherein the collection component (10) comprises: Insulation bracket (2); A collection wiring (3), wherein the collection wiring (3) is installed on the insulating support (2); A flexible printed circuit board (FPC) acquisition board (4) and a connector (5), wherein the FPC acquisition board (4) comprises an FPC acquisition body (41), a connecting portion (42) and a redundant portion (43), wherein the FPC acquisition body (41) is fixedly connected to the top of the expansion beam, the end of the acquisition wiring (3) is electrically connected to the FPC acquisition body (41), the connecting portion (42) is connected to the connector (5), the two ends of the redundant portion (43) are respectively connected to the FPC acquisition body (41) and the connecting portion (42), and the connector (5) is connected to the BMS slave board (100).

2. The collection assembly according to claim 1, wherein: The connecting portion (42) is provided with a piercing terminal, and the piercing terminal is connected to the connector (5).

3. The collection assembly according to claim 1 or 2, wherein: The acquisition wiring (3) comprises a wiring body (31) and a bending section (32); the wiring body (31) is mounted on the insulating bracket (2); the bending section (32) is located at the end of the wiring body (31); and the bending section (32) is electrically connected to the FPC acquisition board (4).

4. The collection assembly according to claim 3, wherein: The connection method between the FPC collection board (4) and the bending section (32) includes hotbar welding, laser welding, ultrasonic welding and resistance welding.

5. The collection assembly according to any one of claims 1 to 4, wherein: A foam rubber layer is sandwiched between the FPC collecting body (41) and the top of the expansion beam.

6. The collection assembly according to any one of claims 1 to 5, wherein: The acquisition line (3) is one of a flexible flat cable (FFC) line and a flexible die-cut circuit board (FDC) line.

7. The collection assembly according to claim 6, wherein: The acquisition line (3) is an FFC line.

8. The collection assembly according to any one of claims 1 to 7, wherein: A collector (411) is provided at one end of the FPC acquisition board (4), and a collection socket (412) is provided at the other end of the FPC acquisition board (4); the collector (411) is plugged into the collection socket (412) on the adjacent FPC acquisition board (4).

9. A battery module, comprising a battery cell and a collection component (10) according to any one of claims 1 to 8, wherein the collection component (10) is electrically connected to the battery cell.

10. A battery box, comprising a box body and the battery module as claimed in claim 9, wherein a plurality of expansion beams arranged at intervals are provided in the box body, and a space configured to accommodate the battery module is formed between two adjacent expansion beams, a battery management system BMS slave board (100) is fixedly provided on the side of the expansion beam, and a collection component (10) in the battery module comprises a flexible printed circuit board FPC collection board (4), the FPC collection board (4) is fixedly connected to the top of the expansion beam, and a connector (5) on the collection component (10) is connected to the BMS slave board (100).

Images