FPC acquisition module of power battery

Abstract

The utility model discloses a kind of FPC collection modules of power battery, including multiple electrically conductive rows and FPC line rows of being connected with being arranged in shell frame, FPC line row includes the collection component being connected with multiple electrically conductive rows at its front, and by FPC line row one end folding forming reverse folding portion located FPC line row back side, and FPC connector is set on the reverse folding portion, reverse folding portion and FPC connector are installed and accommodated in the settlement groove of shell frame setting, by reverse folding portion design makes FPC connector transfer from battery module top to settlement groove, release the space of FPC line row just above and battery module top, solve the insufficient problem of installation flatness caused by the connector protruding of traditional single panel FPC, meet the high requirement of battery module to installation flatness, improve space utilization, help the miniaturization and integration design of battery module, improve the structure stability and overall reliability of FPC line row installation on power battery.

Description

Technical Field

[0001] This utility model relates to the field of flexible printed circuit board technology, specifically to an FPC acquisition module for a power battery. Background Technology

[0002] With the development of information electronic products, FPC (generally referring to flexible circuit boards) is a widely used type of circuit board product. In particular, it has the characteristics of being thin, flexible, rollable, low voltage, low power consumption, and low power consumption. Through embedded circuit design, it can embed a large number of compact components in a limited space. The automotive battery modules on the market use FPC busbars to replace the traditional wire harness connection method in order to achieve the purpose of collecting information such as battery module voltage and temperature.

[0003] Existing FPC busbars can be divided into single-sided FPCs and double-sided FPCs. Compared with single-sided FPCs, double-sided FPCs have added via structures, which can connect the lines on both sides to form a conductive path. Among them, the stacked structure of single-sided FPC products is a single-sided substrate + protective film structure design. This type of single-sided FPC forms multiple lines on a single-sided substrate, and components such as connectors, nickel strips, and NTC (temperature sensors) are soldered on the same side, that is, the side of the FPC with lines. Since battery modules have high requirements for installation flatness, and the connector part of the FPC protrudes a certain height on the top of the battery module, due to some usage limitations, the battery module cannot meet the installation flatness requirements after installing a single-sided FPC. As a result, the single-sided FPC busbar cannot well meet the usage requirements of the battery module, so further design improvements are needed. Utility Model Content

[0004] Therefore, the technical problem to be solved by this utility model is to overcome the problem that the connector part of the single-sided FPC in the prior art protrudes to a certain height on the top of the battery module, which is limited by some usage scenarios, resulting in the single-sided FPC busbar not being able to meet the usage requirements of the battery module well.

[0005] To solve the above-mentioned technical problems, this utility model provides an FPC acquisition module for a power battery, including a housing, multiple conductive bars disposed on the housing, and an FPC busbar extending and connecting the multiple conductive bars. The FPC busbar includes an acquisition component disposed on its front side and connected to the multiple conductive bars, a folded portion formed by folding one end of the FPC busbar and located on the back side of the FPC busbar, and an FPC connector disposed on the folded portion. The FPC busbar has a plurality of acquisition circuits formed on it to connect the acquisition component and the FPC connector. The housing has a settling groove located below the FPC busbar, and the folded portion and the FPC connector are installed and accommodated in the settling groove. A slot structure is opened on one side of the settling groove to expose the FPC connector.

[0006] As a preferred embodiment, a partition gap is formed between the FPC busbar and the folded portion, and a support structure connecting the folded portion is provided in the partition gap, the support structure being fixedly connected to the frame.

[0007] As a preferred embodiment, the support structure is an FR4 reinforcing plate that is fitted and connected between the FPC busbar and the folded portion, and the FPC busbar, the FR4 reinforcing plate, and the folded portion are arranged in a stacked structure.

[0008] As a preferred embodiment, the FR4 reinforcing plate is attached to the upper folded surface of the folded portion facing the FPC busbar, the lower folded surface of the folded portion is provided with a pad portion for connecting the acquisition circuit, the FPC connector is provided with an arc-shaped rear end cover connected to the folded portion, and the connection terminals of the FPC connector are soldered to the pad portion through the rear end cover.

[0009] As a preferred embodiment, the two ends of the FR4 reinforcing plate extending beyond the partition gap are fixed to the housing, and a set of fixing pins are provided on both sides of the bottom of the FPC connector, with the set of fixing pins interlocking on the FR4 reinforcing plate.

[0010] As a preferred embodiment, the FPC busbar is an FPC single-sided panel structure formed by pressing a copper substrate, a plastic cover film, and an adhesive together.

[0011] As a preferred embodiment, the acquisition component includes multiple acquisition plates integrally formed on both sides of the FPC busbar, and multiple nickel sheet structures and multiple temperature sensing elements respectively disposed on the multiple acquisition plates. The nickel sheet structures and the temperature sensing elements are separately bonded and contacted on the battery module.

[0012] As a preferred embodiment, one end of the shell frame is formed with a mounting boss, and the mounting boss is provided with the settlement groove. The FR4 reinforcing plate is fixedly connected to the mounting boss through a connecting structure.

[0013] As a preferred embodiment, the bottom of the mounting boss is provided with a first set of latches, and the top of the mounting boss is provided with a second set of latches.

[0014] Compared with the prior art, the technical solution of this utility model has the following advantages:

[0015] 1. In the FPC acquisition module of the power battery provided by this utility model, the FPC busbar utilizes a reverse folding structure design to flip the connector and its reverse folding part to the back of the FPC busbar. A recessed groove is provided on the housing to accommodate this reverse folding part and the connector. By opening a slot structure on one side of the recessed groove, the FPC connector can be easily exposed and connected to external devices during installation. The advantage of this design is that the reverse folding part design moves the FPC connector from the top of the battery module to the recessed groove, freeing up space above the FPC busbar and the top of the battery module, achieving a compact layout of the FPC busbar. This solves the problem of insufficient installation flatness caused by the protruding connector in traditional single-panel FPCs, meets the high requirements of battery modules for installation flatness, and makes it suitable for applications with strict limitations on space flatness. It improves space utilization, contributes to the miniaturization and integration design of battery modules, and enhances the structural stability and overall reliability of the FPC busbar installed on the power battery.

[0016] 2. In the FPC acquisition module of the power battery provided by this utility model, the FPC connector is folded to the back of the FPC busbar through the folding part and embedded in the sinking groove, so that the installed FPC connector is sunk below the plane of the battery module, thereby reducing the overall installation height of the FPC busbar and ensuring the flatness of the top of the power battery. Since the folding part and the FPC connector are confined in the sinking groove, the sinking groove provides physical constraint and positioning for the FPC connector, which helps to maintain the stability of the FPC connector installation. At the same time, it also provides a protective space for the folding part and the FPC connector, which can reduce the direct damage to the FPC connector from external factors (such as collision, squeezing, etc.), thereby improving the environmental adaptability and service life of the FPC busbar and the connector.

[0017] 3. In the FPC acquisition module of the power battery provided by this utility model, since the FPC busbar itself is a flexible structure, and the axial force and torque generated when the FPC connector is plugged in and out can easily cause tearing or deformation of the FPC busbar and the reverse folding part, an FR4 reinforcing plate is set between the FPC busbar and the reverse folding part. Since the FR4 reinforcing plate is a rigid material, it can effectively support the reverse folding part of the FPC and avoid circuit breakage and component detachment at the reverse folding part due to frequent bending or external force. In addition, since the connection terminals of the FPC connector are welded to the reverse folding part, the FR4 reinforcing plate is located on the back of the terminal welding area of ​​the FPC connector, which can keep the FPC locally rigid, thereby providing a rigid support surface for terminal welding, facilitating the precise positioning of the welding points by automated welding equipment and improving the welding yield.

[0018] 4. In the FPC acquisition module of the power battery provided by this utility model, the FPC connector is installed on the FR4 reinforcing plate through a set of fixed pins, and the fixed pins are welded to the FR4 reinforcing plate. In this structure, the fixed pins are inserted into the positioning holes of the FR4 reinforcing plate before welding, which plays a pre-fixing role and ensures that the connection terminals of the FPC connector are precisely aligned with the solder pads. The fixed pins are mechanically locked to the FR4 reinforcing plate, so that the connector and the reinforcing plate are fixed to form a rigid whole, which plays a rigid anchoring role, preventing the solder joints of the FPC connector from fatigue fracture or the insertion position from loosening due to vibration, and improving the vibration resistance and impact resistance performance. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 This is a schematic diagram of the structure of the FPC acquisition module for the power battery of this utility model;

[0021] Figure 2 for Figure 1 A partially enlarged structural diagram of the FPC acquisition module shown;

[0022] Figure 3 This is a schematic diagram of the structure of the FPC busbar of this utility model;

[0023] Figure 4 This is a side view of the FPC busbar of this utility model;

[0024] Figure 5 This is a schematic diagram of the structure of the FPC connector of this utility model.

[0025] Explanation of reference numerals in the attached drawings: 1. FPC busbar; 11. Data acquisition plate; 12. Nickel sheet structure; 13. Temperature sensing element; 2. Housing frame; 3. Conductive busbar; 4. Reverse fold; 5. FPC connector; 51. Fixing pin; 52. Rear end cover; 6. Settling groove; 7. FR4 reinforcing plate; 71. Mounting part; 8. Mounting boss; 81. First snap-fit; 82. Second snap-fit. Detailed Implementation

[0026] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] In the description of this utility model, it should be noted that the terms "first", "second" and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0028] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0029] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0030] Example

[0031] The following is a detailed description of this embodiment with reference to the accompanying drawings:

[0032] This embodiment provides, as follows: Figure 1-5 The diagram shows an FPC acquisition module for a power battery, comprising a housing 2, a battery module disposed on the housing 2, and an FPC busbar 1. Multiple conductive bars 3 are electrically connected to multiple battery modules of the power battery, allowing the FPC busbar 1 to connect with the battery modules via the conductive bars 3. The FPC busbar 1 includes an acquisition component disposed on its front side and connected to the multiple conductive bars 3, and a folded portion 4 formed by folding one end of the FPC busbar 1 on one side of its back side, and an FPC connector 5 disposed on the folded portion 4. The FPC busbar 1 has several acquisition circuits formed on it, connecting the acquisition component and the FPC connector 5. The housing 2 has a recessed groove 6 located below the FPC busbar 1, and the folded portion 4 and the FPC connector 5 are installed and accommodated in the recessed groove 6. A slot structure is provided on one side of the recessed groove 6 to expose the FPC connector 5.

[0033] The above-described implementation method is the core technical solution of this embodiment. The FPC busbar 1 utilizes a reverse folding structure design to flip the connector and its corresponding reverse folding part 4 to the back of the FPC busbar 1. A recessed groove 6 is provided on the housing 2 to accommodate the reverse folding part 4 and the connector. By opening a slot structure on one side of the recessed groove 6, the FPC connector 5 can be easily exposed and connected to external devices during installation. The advantage of this design is that the reverse folding part 4 design allows the FPC connector 5 to be moved from the top of the battery module to the recessed groove 6, freeing up space above the FPC busbar and the top of the battery module. This achieves a compact layout of the FPC busbar, solves the problem of insufficient installation flatness caused by the protruding connector in traditional single-panel FPCs, meets the high requirements of battery modules for installation flatness, and makes it suitable for applications with strict limitations on space flatness. This improves space utilization, contributes to the miniaturization and integration design of battery modules, and enhances the structural stability and overall reliability of the FPC busbar installed on the power battery.

[0034] As a preferred embodiment, such as Figure 2-5As shown, a partition gap is formed between the FPC cable tray 1 and the folded portion 4, and a support structure connecting the folded portion 4 is provided in this partition gap. The support structure is fixedly connected to the housing 2. The support structure provides installation support for the FPC connector 5 provided on the folded portion 4, thereby strengthening the structural strength. Specifically, the support structure is an FR4 reinforcing plate 7 that fits between the FPC cable tray 1 and the folded portion 4. The FR4 reinforcing plate 7 fits against the upper folded surface of the folded portion 4 facing the FPC cable tray 1, and the lower folded surface of the folded portion 4... The FPC connector 5 has a pad portion for connecting the acquisition circuit. The FPC connector 5 has an arc-shaped rear end cover 52 connected to the folded portion 4. The connection terminals of the FPC connector 5 pass through the rear end cover 52 and are soldered to the pad portion. The rear end cover 52 prevents the connection terminals from being exposed and protects the connection terminals. This design makes the FPC busbar 1, FR4 reinforcing plate 7, and folded portion 4 arranged in a stacked structure. The stacked structure design evenly distributes the stress to the entire support surface, reduces the risk of tearing at the folded part of the FPC, and extends the service life of the FPC busbar 1. In summary, given that the FPC busbar itself is a flexible structure, and the insertion and removal forces generated when the FPC connector 5 is plugged in and out can easily cause tearing or deformation of the FPC busbar 1 and the reverse bend portion 4, an FR4 reinforcing plate 7 is installed between the FPC busbar 1 and the reverse bend portion 4. As a rigid material, the FR4 reinforcing plate 7 can effectively support the reverse bend portion 4 of the FPC, preventing circuit breakage and component detachment at the reverse bend due to frequent bending or external forces. In addition, since the connection terminals of the FPC connector 5 are soldered to the reverse bend portion 4, and the FR4 reinforcing plate is located on the back of the terminal soldering area of ​​the FPC connector, it can maintain the rigidity of the FPC locally, thereby providing a rigid support surface for terminal soldering, facilitating accurate positioning of solder joints by automated soldering equipment, and improving the soldering yield.

[0035] In a further preferred configuration, the two ends of the FR4 reinforcing plate 7 extending beyond the interlayer gap are fixed to the housing 2. A set of fixing pins 51 are provided on both sides of the bottom of the FPC connector 5. These fixing pins 51 are inserted into the FR4 reinforcing plate 7 and welded to it. This structure allows the fixing pins 51 to be pre-fixed before welding, ensuring precise alignment between the FPC connector 5's connection terminals and the solder pads. The fixing pins 51, inserted into the FR4 reinforcing plate 7, form a mechanical lock, solidifying the connector and reinforcing plate into a rigid whole. This provides rigid anchoring, preventing fatigue fracture of the solder joints or loosening of the connection position due to vibration, and improving vibration and impact resistance. Furthermore, the FR4 reinforcing plate 7 is an epoxy resin fiberglass board with high insulation resistance and dielectric strength, isolating the FPC circuitry from the metal components on the folded section, preventing leakage or short circuits.

[0036] In this embodiment, the FPC busbar 1 is a single-sided FPC structure formed by pressing a copper substrate, a plastic cover film, and an adhesive. The acquisition component includes multiple acquisition pieces 11 integrally formed on both sides of the FPC busbar 1, and multiple nickel sheet structures 12 and multiple temperature sensing elements respectively disposed on the multiple acquisition pieces 11. The nickel sheet structures 12 and the temperature sensing elements are separately attached to the conductive busbar 3 to achieve the purpose of acquiring information such as battery module voltage and temperature.

[0037] Further optimization settings, refer to Figure 1-2 As shown, one end of the housing 2 is formed with a mounting boss 8, and the mounting boss 8 is provided with a settling groove 6. The FR4 reinforcing plate 7 is fixedly connected to the mounting boss 8 through a connecting structure. The connecting structure can be a screw structure or a snap-fit ​​structure. Specifically, mounting holes or snap-fit ​​structures can be provided on the FR4 reinforcing plate 7, and it can be fixed to the housing 2 by screws or snap-fits to keep the position of the FPC busbar stable and avoid line wear or plug loosening caused by vibration. The bottom of the mounting boss 8 is provided with a set of first snap-fits 81, and the top of the mounting boss 8 is provided with a set of second snap-fits 82. When the housing 2 is installed in the preset installation position of the battery module, the mounting boss 8 is positioned and installed by the two sets of snap-fits, which enhances the connection reliability and vibration resistance.

[0038] The FPC acquisition module designed using this technical solution folds the FPC connector 5 to the back of the FPC busbar 1 via a folding part and embeds it into the sinking groove 6. This allows the installed FPC connector to sink below the plane of the battery module, thereby reducing the overall installation height of the FPC busbar and ensuring the flatness of the top of the power battery. The folding part 4 and the FPC connector 5 are constrained and installed in the sinking groove 6. The sinking groove 6 provides physical constraints and positioning for the FPC connector 5, which helps maintain the stability of the FPC connector installation. It also provides a protective space for the folding part 4 and the FPC connector 5, which can reduce the direct damage to the FPC connector from external factors (such as collisions, squeezing, etc.), thereby improving the environmental adaptability and service life of the FPC busbar and connector.

[0039] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. An FPC acquisition module for a power battery, comprising a housing (2), a plurality of conductive bars (3) disposed on the housing (2), and an FPC busbar (1) extending and connecting the plurality of conductive bars (3), characterized in that: The FPC busbar (1) includes a data acquisition component connected to multiple conductive busbars (3) on its front side, a folded portion (4) formed by folding one end of the FPC busbar (1) and located on the back side of the FPC busbar (1), and an FPC connector (5) provided on the folded portion (4). The FPC busbar (1) is formed with a plurality of data acquisition circuits connecting the data acquisition component and the FPC connector (5). The housing (2) is provided with a sinking groove (6) located below the FPC busbar (1). The folded portion (4) and the FPC connector (5) are installed and accommodated in the sinking groove (6). A slot structure is provided on one side of the sinking groove (6) to expose the FPC connector (5).

2. The FPC acquisition module for the power battery according to claim 1, characterized in that: A partition gap is formed between the FPC busbar (1) and the folded portion (4), and a support structure connecting the folded portion (4) is provided in the partition gap. The support structure is fixedly connected to the frame (2).

3. The FPC acquisition module for the power battery according to claim 2, characterized in that: The supporting structure is an FR4 reinforcing plate (7) that is attached between the FPC busbar (1) and the folded part (4). The FPC busbar (1), the FR4 reinforcing plate (7), and the folded part (4) are arranged in a stacked structure.

4. The FPC acquisition module for the power battery according to claim 3, characterized in that: The FR4 reinforcing plate (7) is attached to the upper folded surface of the folded part (4) facing the FPC busbar (1). The lower folded surface of the folded part (4) is provided with a pad for connecting the acquisition circuit. The FPC connector (5) is provided with an arc-shaped rear end cover (52) connected to the folded part (4). The connection terminal of the FPC connector (5) passes through the rear end cover (52) and is soldered to the pad.

5. The FPC acquisition module for the power battery according to claim 4, characterized in that: The two ends of the FR4 reinforcing plate (7) extending out of the partition gap are fixed on the frame (2). A set of fixing pins (51) are provided on both sides of the bottom of the FPC connector (5). The set of fixing pins (51) are inserted into the FR4 reinforcing plate (7).

6. The FPC acquisition module for a power battery according to any one of claims 1-5, characterized in that: The FPC busbar (1) is a single-sided FPC structure formed by pressing a copper substrate, a plastic cover film, and an adhesive.

7. The FPC acquisition module for the power battery according to claim 6, characterized in that: The acquisition component includes multiple acquisition pieces (11) integrally formed on both sides of the FPC busbar (1), and multiple nickel sheet structures (12) and multiple temperature sensing elements respectively disposed on the multiple acquisition pieces (11). The nickel sheet structures (12) and the temperature sensing elements are separately attached to the battery module.

8. The FPC acquisition module for the power battery according to claim 3, characterized in that: One end of the frame (2) is formed with a mounting boss (8), and the mounting boss (8) is provided with the settlement groove (6). The FR4 reinforcing plate (7) is fixedly connected to the mounting boss (8) through a connecting structure.

9. The FPC acquisition module for the power battery according to claim 8, characterized in that: The bottom of the mounting boss (8) is provided with a set of first buckles (81), and the top of the mounting boss (8) is provided with a set of second buckles (82).

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