An FPC flexible wire harness connecting plate structure for fuel cell stack inspection

Abstract

The present invention provides an FPC flexible wire harness connection board structure for fuel cell stack inspection, which includes a stack battery pack, a fuel cell voltage inspection module, a bipolar plate connector, and an FPC flexible circuit board. The bipolar plate connector is connected to the stack battery pack. The bipolar plate connector includes a main body structure and terminals. The terminals are assembled on the main body structure. The terminals are connected to welding copper posts. The welding copper posts are fixed on the main body structure through rubber plugs. A welding end face is provided at the other end of the welding copper posts. The welding end face is connected to the FPC flexible circuit board. The other end of the FPC flexible circuit board is connected to the fuel cell voltage inspection module. The beneficial effects of the present invention are as follows: reducing the number of wire harnesses in fuel cell assembly, enhancing the seismic performance, mass power density, and volume power density of the fuel cell stack.

Description

Technical Field

[0001] The present invention relates to the field of fuel cell structure design, and particularly relates to an FPC flexible wire harness connecting plate structure for fuel cell stack inspection. Background Art

[0002] The core of a high-power fuel cell stack is often assembled from hundreds of single cells. In order to detect the voltage of each cell, the stack is connected by low-voltage wire harnesses to detect the battery voltage. However, for high-power fuel cell stacks with dozens or even hundreds of cells, using traditional low-voltage wire harnesses such as Teflon connecting wire harnesses, the number of wire harnesses can reach up to a hundred, which easily causes an increase in the overall mass of the stack, reducing the mass power density of the fuel cell; too many wire harnesses will also occupy a large amount of space, resulting in a decrease in the volume power density of the fuel cell. At the same time, too many wire harnesses are prone to connection risks; the assembly process for fixing so many wire harnesses will also be more complex.

[0003] Patent CN113013706A discloses a production process for hydrogen fuel cell wire harnesses. In this patent, different heat shrink tubes are set to different colors after twisting, and at the same time, a straight plug-in sheath is put on the crimping head to achieve rapid and stable installation of the wire harness.

[0004] However, the above technical content only realizes accurate and stable connection of the fuel cell wire harness, but still requires connection of a large number of wire harnesses. Summary of the Invention

[0005] In order to solve the above technical problems, the present invention discloses an FPC flexible wire harness connecting plate structure for fuel cell stack inspection, which can reduce the wire harness connection of the fuel cell, improve the mass power density, volume power density and vibration resistance of the fuel cell stack. The technical solution of the present invention is implemented as follows:

[0006] An FPC flexible wire harness connecting plate structure for fuel cell stack inspection includes a stack battery group, a fuel cell voltage inspection module, a bipolar plate connector and an FPC flexible circuit board. The bipolar plate connector is connected to the stack battery group. The bipolar plate connector includes a main body structure and terminals. The terminals are assembled on the main body structure. The terminals are connected to welding copper posts. The welding copper posts are fixed on the main body structure through rubber plugs. The other end of the welding copper post is provided with a welding end face. The welding end face is connected to the FPC flexible circuit board. The other end of the FPC flexible circuit board is connected to the fuel cell voltage inspection module.

[0007] Preferably, the material of the main body structure is PA66 engineering plastic.

[0008] Preferably, the terminals and the welding copper posts are connected by crimping.

[0009] Preferably, the rubber stopper uses injection molding or sealing to fix the welded copper column.

[0010] Preferably, the FPC flexible circuit board is connected to the fuel cell voltage inspection module by using a selected standard electrical connector.

[0011] Preferably, the fuel cell voltage inspection module includes the FPC flexible circuit board.

[0012] Preferably, the FPC flexible circuit board is connected to two or more bipolar plate connectors.

[0013] Preferably, the connection method between the FPC flexible circuit board and the bipolar plate connector includes welding.

[0014] Implementing the technical solution of the present invention can solve the technical problems in the prior art that the large number of wire harnesses in fuel cells leads to a large mass of fuel cells, low mass power density, and complex assembly and fixation of the wire harnesses of fuel cells, increasing the time cost of fuel cell production and resulting in poor quality of fuel cells due to assembly errors. Implementing the technical solution of the present invention, by using an FPC flexible wire harness board structure with a high applicable environmental temperature to connect the fuel cell stack and the voltage inspection module, it is possible to reduce the number of wire harnesses in fuel cell assembly, enhance the seismic performance of the stack, as well as the mass power density and volume power density. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for description in the embodiments or the prior art. Obviously, the following drawings are only one embodiment of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0016] Wherein the same components are denoted by the same reference numerals. It should be noted that the terms "front", "rear", "left", "right", "upper" and "lower" used in the following description refer to the directions in the drawings, and the terms "bottom surface" and "top surface", "inner" and "outer" respectively refer to the directions towards or away from the geometric center of a specific component.

[0017] Figure 1 Schematic diagram of the connection of the FPC flexible circuit board;

[0018] Figure 2 Schematic diagram of the structure of the bipolar plate connector;

[0019] Figure 3Schematic diagram of the structure of an FPC flexible circuit board connecting multiple bipolar plate connectors.

[0020] In the above drawings, each figure number label represents respectively:

[0021] 1 Fuel cell voltage inspection module

[0022] 2 Stack battery pack

[0023] 3 Bipolar plate connector

[0024] 3-1 Main body structure

[0025] 3-2 Terminal

[0026] 3-3 Welding copper column

[0027] 3-4 Rubber plug

[0028] 3-5 Welding end face

[0029] 4 FPC flexible circuit board Specific implementation manner

[0030] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts belong to the scope of protection of the present invention.

[0031] Embodiment 1

[0032] In the preferred Embodiment 1, as Figure 1 , Figure 2 and Figure 3 shown, an FPC flexible wire harness connection board structure for fuel cell stack inspection includes a stack battery pack 2, a fuel cell voltage inspection module 1, a bipolar plate connector 3, and an FPC flexible circuit board 4. The bipolar plate connector 3 is connected to the stack battery pack 2. The bipolar plate connector 3 includes a main body structure 3-1 and a terminal 3-2. The terminal 3-2 is assembled on the main body structure 3-1. The terminal 3-2 is connected to a welding copper column 3-3. The welding copper column 3-3 is fixed on the main body structure 3-1 through a rubber plug 3-4. A welding end face 3-5 is provided on the welding copper column 3-3. The welding end face 3-5 is connected to the FPC flexible circuit board 4. The other end of the FPC flexible circuit board 4 is connected to the fuel cell voltage inspection module 1.

[0033] In Embodiment 1, the FPC flexible circuit board 4 is adopted to connect the stack battery pack 2 and the fuel cell voltage inspection module 1. An FPC flexible wire harness is arranged in the FPC flexible circuit board 4. The FPC flexible wire harness itself has the characteristics of light weight and small volume. The FPC flexible circuit board 4 is connected to the bus bar with a metal sheet, and a fuse protection current design is added to ensure the high-speed transmission route of information. It is ensured that even if a short circuit problem occurs in the battery stack, the internal design of the FPC flexible circuit board 4 will directly fuse the circuit copper wire to avoid combustion or explosion of other parts of the battery. The FPC flexible circuit board adopts a highly integrated design, saving a large amount of wire connection work. As Figure 1 shown, by setting the FPC flexible circuit board 4, the stack battery pack 2 and the fuel cell voltage inspection module 1 can be directly connected without setting a large number of wire harnesses externally. The connection of the entire circuit is simple, without the need to connect a large number of wire harnesses, reducing the volume of the fuel cell and at the same time reducing the time cost of fuel cell production and assembly.

[0034] During the use of the fuel cell, it will be subjected to certain vibrations. Especially, the vehicle-mounted fuel cell will be subjected to certain impacts during use. After being impacted, the structure of the stack in the fuel cell will be damaged, resulting in the failure of the fuel cell. In Embodiment 1, the FPC flexible circuit board 4 is connected to the stack battery pack 2 through the bipolar plate connector 3. The bipolar plate connector 3 can be connected to the stack battery pack 2 through a plug-and-play structure. For the selection of the plug-and-play structure, common plug-and-play structures in the current existing technologies can be selected. Adopting the plug-and-play structure can not only ensure the stable connection between the bipolar plate connector 3 and the stack battery pack 2, but also achieve quick connection. The bipolar plate connector 3 can connect and fix multiple single cells in the stack. As Figure 3 shown, the bipolar plate connector 3 can connect and fix multiple single cells of the fuel cell stack to improve the vibration resistance of the fuel cell stack. The structure of the bipolar plate connector 3 is as Figure 2 shown. The bipolar plate connector 3 includes a main body structure 3-1 and terminals 3-2. The terminals 3-2 are inserted onto the main body structure 3-1 through assembly. The terminals 3-2 can be connected and welded to the welding copper column 3-3 through a crimping process. A welding end face 3-5 is arranged on the welding copper column 3-3, and the welding end face 3-5 is connected to the FPC flexible circuit board 4 by welding. The welding copper column 3-3 is crimped and connected to the terminals 3-2, and the periphery of the welding copper column 3-3 is fixed to the main body structure 3-1 through the rubber plug 3-4 at the same time. For the rubber plug 3-4, potting or sealing can be selected.

[0035] The main structure 3-1 plays a certain role in supporting and fixing, and plays a role in fixing the connection between the stack battery pack 2 and the FPC flexible circuit board 4. The main structure 3-1 can be made of PA66 engineering plastic, which can ensure strength and at the same time has a certain elasticity. The terminal 3-2 is fixed on the main structure 3-1. The terminal 3-2 is connected to the stack battery pack 2. The terminal 3-2 is crimped to the welding copper column 3-3. The welding copper column 3-3 is welded to the FPC flexible circuit board 4 through the welding end face 3-5. The FPC flexible circuit board 4 is connected to the stack battery pack 2 through the welding copper column 3-3 and the terminal 3-2. At the same time, in order to ensure the stable fixation of the welding copper column 3-3, a rubber plug 3-4 is arranged around the welding copper column 3-3 to fix the periphery of the welding copper column 3-3. The rubber plug 3-4 has an insulating function and can prevent problems such as short circuits at the connection. The other end of the FPC flexible circuit board 4 is connected to the fuel cell voltage inspection module 1 through a selected standard electrical connector or the fuel cell voltage inspection module 1 can directly lead out the FPC flexible circuit board 4 to realize the voltage inspection of the fuel cell, and the circuit connection is simple.

[0036] Embodiment 2

[0037] In the preferred Embodiment 2, an FPC flexible wire harness connecting plate structure for fuel cell stack inspection is as Figure 3 shown. The FPC flexible circuit board 4 adopts a higher integrated design. The FPC flexible circuit board 4 can be connected to multiple bipolar plate connectors 3 by welding or other means. Each bipolar plate connector 3 is adapted to a single stack battery pack 2. The connection between the FPC flexible circuit board 4 and multiple bipolar plate connectors 3 realizes the connection of a multi-section fuel cell stack. Embodiment 2 ensures a high adaptability to a multi-section fuel cell stack.

[0038] Embodiment 3

[0039] A fuel cell, according to the technical content in Embodiment 1 or Embodiment 2, the technical content of Embodiment 1 or Embodiment 2 is adopted in the fuel cell for assembly. The fuel cell stack has high anti-vibration performance, mass power density and volume power density.

[0040] It should be noted that the above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An FPC flexible wire harness connecting plate structure for fuel cell stack inspection, characterized in that: It includes a stack battery pack, a fuel cell voltage inspection module, a bipolar plate connector, and an FPC flexible circuit board. The bipolar plate connector is connected to the stack battery pack. The bipolar plate connector includes a main body structure and terminals. The main body structure is made of PA66 engineering plastic. The terminals are assembled on the main body structure. The terminals are connected to welding copper posts. The welding copper posts are fixed on the main body structure through rubber plugs. A welding end face is provided at the other end of the welding copper posts. The welding end face is connected to the FPC flexible circuit board. The other end of the FPC flexible circuit board is connected to the fuel cell voltage inspection module.

2. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to claim 1, characterized in that: The terminals and the welding copper posts are connected by crimping.

3. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to claim 2, characterized in that: The rubber plugs are used to fix the welding copper posts by injecting glue or sealing glue.

4. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to claim 3, characterized in that: The FPC flexible circuit board is connected to the fuel cell voltage inspection module by using a selected standard electrical connector.

5. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to claim 4, characterized in that: The fuel cell voltage inspection module includes the FPC flexible circuit board.

6. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to any one of claims 1-5, characterized in that: The FPC flexible circuit board is connected to two or more of the bipolar plate connectors.

7. The FPC flexible wire harness connecting plate structure for fuel cell stack inspection according to claim 6, characterized in that: The connection method between the FPC flexible circuit board and the bipolar plate connector includes welding.

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