Flexible fixing support for fuel cell stack collection wire harness

Abstract

The utility model relates to the field of fuel cell stacks, in particular to a flexible fixing bracket for a fuel cell stack acquisition wire harness. The fixing base is provided with a plurality of fixing spaces, and the pressing plates correspond to the fixing spaces in a one-to-one mode and are detachably installed. The fixing space is provided with an upper bayonet and a lower bayonet; the pressing plate is provided with an upper buckle matched with the upper clamping opening and a lower buckle matched with the lower clamping opening, and the pressing plate is further provided with a pressing transverse rib and a guiding piece. According to the utility model, through the combination of the fixed base and the plurality of pressing plates, the wire harness is fixed and positioned firmly, the installation is convenient, the disassembly is simple, and especially the maintenance and carding of local wire harnesses are facilitated.

Description

Technical Field

[0001] This utility model relates to the field of fuel cell stacks, and in particular to a flexible fixing bracket for the data acquisition harness of a fuel cell stack. Background Technology

[0002] Hydrogen fuel cell systems offer advantages such as zero emissions and rapid refueling, effectively solving problems like long charging times and short driving range associated with lithium batteries. They represent a promising new energy vehicle power system. A hydrogen fuel cell system typically consists of a stack, hydrogen system, air system, thermal management system, and control system. The stack is the core component, and its external interfaces include inlets and outlets for hydrogen, air, and water, mechanical connection points, high-voltage busbars, and low-voltage acquisition wiring harnesses. The low-voltage acquisition interface primarily outputs internal voltage information from the stack for external control input. Therefore, the stability of the low-voltage acquisition signal directly affects the stability of the entire stack and fuel cell system. Current issues with low-voltage acquisition mainly stem from unstable fixing of the internal low-voltage acquisition wiring harness, leading to loose terminals and signal loss.

[0003] Existing technical solutions generally employ a structure that directly compresses the low-voltage wiring harness using a pressure plate and foam, which often fails to guarantee robustness. Furthermore, during maintenance, if any area requires inspection or repair, the entire pressure plate must be disassembled, which is not only cumbersome but also prone to creating unnecessary safety hazards. Utility Model Content

[0004] To address the problems existing in the background technology, a flexible fixing bracket for the data acquisition harness of a fuel cell stack is proposed. This invention uses a fixed base and multiple pressure plates to securely fix and position the harness, making installation convenient and disassembly simple, and is particularly easy for the maintenance and organization of specific sections of the harness.

[0005] This utility model proposes a flexible fixing bracket for the data acquisition harness of a fuel cell stack, including a fixing base with multiple fixing spaces and a pressure plate that can be detached and installed one-to-one with the fixing spaces; each fixing space is provided with an upper latch and a lower latch; the pressure plate is provided with an upper buckle that matches the upper latch and a lower buckle that matches the lower latch, and the pressure plate is also provided with a clamping cross rib and a guide.

[0006] Preferably, the fixed space is a frame type with open front and rear, which houses the terminals and wire harnesses. One side of the frame is installed on the end plate of the fuel cell stack, and the other side of the frame is engaged with the connecting pressure plate.

[0007] Preferably, a clamping frame is installed in the fixed space; the upper and lower clamps are respectively arranged at the four top corners of the fixed space.

[0008] Preferably, the pressure plate includes a vertical section and a horizontal section located at the top of the vertical section; the horizontal section is deformable; the upper buckle is installed at the top of the horizontal section; the pressing cross rib is installed at the upper part of the vertical section; the guide is installed at the lower part of the vertical section; and the lower buckle is installed at the bottom of the vertical section.

[0009] Preferably, a foam layer is provided at the bottom of the horizontal section.

[0010] Preferably, the upper buckle is a right-angled trapezoidal strip that is narrower at the top and wider at the bottom.

[0011] Preferably, the clamping frame is configured as an inverted stepped structure; the clamping cross rib cooperates with the clamping frame to form a clamping channel that is interference-fitted with the wire harness, and is clamped on both sides of the wire harness on the left and right.

[0012] Preferably, the guide is an L-shaped bending frame, which limits the wire harness by bending the part.

[0013] Preferably, the guide members are arranged in two rows, with the positions of the upper and lower rows corresponding one-to-one and the bending directions opposite, one to the left and one to the right, one up and one down, to limit the wire harness.

[0014] Compared with existing technologies, this utility model has the following beneficial technical effects: The structure is simple, consisting of a fixed base and multiple pressure plates. On one hand, upper and lower guide members limit the wire harness position; on the other hand, clamping ribs cooperate with the clamping frame, securing the wire harness firmly to both sides. The pressure plates are installed on the fixed base via snap-fit ​​fasteners around the perimeter, making installation and disassembly convenient, especially for the maintenance and sorting of localized wire harnesses. If inspection or maintenance is required in one area, only the individual pressure plate needs to be disassembled. The device is compact, flexible, highly pre-assembleable, and offers high maintenance efficiency and low risk. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the installation state of the flexible fixing bracket for the data acquisition harness of the fuel cell stack in this utility model;

[0016] Figure 2 This is a schematic diagram showing the disassembled state of the flexible fixing bracket for the data acquisition harness of the fuel cell stack in this utility model.

[0017] Figure 3 This is a schematic diagram of the structure of the fixed base in this utility model;

[0018] Figure 4 This is a schematic diagram of the structure of the pressure plate of this utility model.

[0019] Reference numerals: 1. Fuel cell stack; 2. Voltage monitoring plate; 3. Terminal; 4. Wiring harness; 5. Fixing base; 501. Fixing space; 502. Upper bayonet; 503. Clamping frame; 504. Lower bayonet; 6. Pressure plate; 601. Vertical section; 602. Lower buckle; 603. Guide component; 604. Clamping rib; 605. Horizontal section; 606. Upper buckle. Detailed Implementation

[0020] Example 1

[0021] like Figures 1-2 As shown, the fuel cell stack 1 is mainly composed of multiple bipolar plates. There is a voltage between each pair of adjacent bipolar plates, and each bipolar plate is equipped with a voltage monitoring plate 2. The general low-voltage wiring harness 4 acquisition scheme is to acquire one voltage signal for every two plates as a group. The existing fixing structure of the low-voltage wiring harness 4 inside the fuel cell stack 1 lacks durability and reliability. After undergoing appropriate durability tests, especially vibration tests, it is easy to cause loss of clamping force, loosening of the wiring harness, and thus loosening of the terminals. Therefore, this utility model proposes a flexible fixing bracket for the fuel cell stack acquisition wiring harness, including a fixing base 5 with multiple fixing spaces 501 and a pressure plate 6 that can be detachably installed corresponding to each fixing space; each fixing space 501 is provided with an upper latch 502 and a lower latch 504; the pressure plate 6 is provided with an upper buckle 606 that matches the upper latch 502 and a lower buckle 602 that matches the lower latch 504, and the pressure plate 6 is also provided with a clamping cross rib 604 and a guide 603.

[0022] like Figure 3 As shown, the fixed space 501 is a frame-shaped structure with open front and rear. The frame houses the terminal 3 and the wire harness 4. One side of the frame is mounted on the fuel cell end plate, and the other side of the frame engages with the pressure plate 6. A clamping frame 503 is installed inside the fixed space 501; the upper clamping slot 502 and the lower clamping slot 504 are respectively arranged at the four top corners of the fixed space 501.

[0023] like Figure 4 As shown, the pressure plate 6 includes a vertical section 601 and a horizontal section 605 located at the top of the vertical section 601; the horizontal section 605 is deformable; the upper buckle 606 is installed at the top of the horizontal section 605; the pressing cross rib 604 is installed at the upper part of the vertical section 601; the guide 603 is installed at the lower part of the vertical section 601; and the lower buckle 602 is installed at the bottom of the vertical section 601.

[0024] It should be further noted that a foam layer is provided at the bottom of the horizontal section 605.

[0025] It should be further explained that the upper buckle 606 is designed as a right-angled trapezoidal strip that is narrower at the top and wider at the bottom.

[0026] It should be further explained that the clamping frame 503 is set as an inverted stepped structure; the clamping cross rib 604 cooperates with the clamping frame 503 to form a clamping channel that is interference fit with the wire harness 4, and is clamped on both sides of the wire harness 4 on the left and right.

[0027] It should be further explained that the guide 603 is an L-shaped bending frame, which limits the wire harness 4 through the bending part.

[0028] It should be further explained that the guide 603 is set in two rows, with the upper and lower rows of guide 603 corresponding to each other and bending in opposite directions, one to the left and one to the right, one up and one down, to limit the wire harness 4.

[0029] Example 2

[0030] This embodiment proposes a method for fixing the fuel cell stack data acquisition harness based on the flexible fixing bracket for the fuel cell stack data acquisition harness in Embodiment 1. The steps are as follows:

[0031] S1. After the fuel cell stack 1 is assembled, connect one side of the frame opening of the fixing base 5 to the stack end plate.

[0032] S2. Pass the wire harness 4 through the upper and lower guides 603 of the pressure plate 6 in sequence for sorting and positioning;

[0033] S3. Pass the terminal 3 of the wire harness 4 through the fixed space 501 and plug it into the voltage inspection piece 2;

[0034] S4. After insertion, cover the other side of the frame opening of the fixed base 5 with the pressure plate 6, and then snap the lower buckle 602 into the lower buckle opening 504. Then snap the upper buckle 606 into the upper buckle opening 502. The wire harness 4 is fixed in the pressing channel and is limited by the guide 603. The foam layer fixes the wire harness 4 from the top.

[0035] S5. Fix all the pressure plates 6 to the fixed base 5 in sequence;

[0036] S6. During maintenance, the pressure plate 6 can be removed by pressing down the upper buckle 606 until the horizontal section 605 deforms.

[0037] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited thereto. Various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention.

Claims

1. A flexible fixing bracket for a fuel cell stack data acquisition harness, characterized in that, It includes a fixed base (5) with multiple fixed spaces (501) and a pressure plate (6) that is detachable and installable in a one-to-one correspondence with the fixed spaces; The fixed space (501) is equipped with an upper bayonet (502) and a lower bayonet (504); The pressure plate (6) is provided with an upper buckle (606) that matches the upper latch (502) and a lower buckle (602) that matches the lower latch (504). The pressure plate (6) is also provided with a pressing cross rib (604) and a guide (603).

2. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 1, characterized in that, The fixed space (501) is a frame with open front and rear, which houses the terminal (3) and wire harness (4). One side of the frame is installed on the end plate of the fuel cell stack, and the other side of the frame is engaged with the pressure plate (6).

3. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 2, characterized in that, A clamping frame (503) is installed in the fixed space (501); the upper clamp (502) and the lower clamp (504) are respectively arranged at the four top corners of the fixed space (501).

4. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 3, characterized in that, The pressure plate (6) includes a vertical section (601) and a horizontal section (605) located at the top of the vertical section (601); the horizontal section (605) is deformable; an upper buckle (606) is installed at the top of the horizontal section (605); a pressing cross rib (604) is installed on the upper part of the vertical section (601); a guide (603) is installed on the lower part of the vertical section (601); and a lower buckle (602) is installed at the bottom of the vertical section (601).

5. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 4, characterized in that, A foam layer is provided at the bottom of the horizontal section (605).

6. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 5, characterized in that, The upper buckle (606) is set as a right-angled trapezoidal strip that is narrower at the top and wider at the bottom.

7. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 5, characterized in that, The clamping frame (503) is set as an inverted stepped structure; the clamping cross rib (604) cooperates with the clamping frame (503) to form a clamping channel that is interference fit with the wire harness (4), and is clamped on both sides of the wire harness (4) on the left and right.

8. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 1, characterized in that, The guide (603) is an L-shaped bending frame, which limits the wire harness (4) by bending the part.

9. The flexible fixing bracket for the fuel cell stack data acquisition harness according to claim 8, characterized in that, The guide (603) is set in two rows. The positions of the upper and lower rows of guide (603) correspond one to one and the bending directions are opposite. They limit the wire harness (4) by one on the left and one on the right, one on the top and one on the bottom.

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