Fuel cell system based on single wire system

Abstract

The utility model discloses a fuel cell system based on a single wire system. The fuel cell system adopts a metal shell, more than one electrified part is arranged in the fuel cell system, the electrified parts are connected by adopting a single wire, positive electrodes of the electrified parts are connected to a whole vehicle or a rack, negative electrodes of the electrified parts are connected to the metal shell, and the metal shell is connected with a negative electrode of the whole vehicle or a negative electrode of a test rack. According to the fuel cell system, the mode of single-wire system power supply and negative electrode grounding is adopted, after electrification, continuous electrons are communicated with a whole vehicle frame through the metal shell of the fuel cell system, just like an anti-oxidation layer is attached to the metal surface, so that shell materials are not prone to losing electrons and being oxidized, the corrosion resistance of the fuel cell system structure is improved, and the service life of the fuel cell system is prolonged. And the continuity of the strength is ensured.

Description

Technical Field

[0001] The utility model relates to a fuel cell system, in particular to a fuel cell system based on a single-wire system. Background Art

[0002] Fuel cell systems have broad application prospects in the energy field and have attracted much attention due to their high efficiency and environmental friendliness. However, the operation of fuel cell systems is inseparable from the system BOP. The power supply and communication of the system BOP accessories currently require effective wiring harness connections, resulting in a relatively complex wiring harness for the fuel cell system body. Considering the safety of system operation and better reducing electromagnetic interference, the power supply of the BOP in the fuel cell system often adopts a DC method.

[0003] In the prior art, the low-voltage wiring harness for the power supply of the fuel cell system BOP adopts a two-wire system for power supply, that is, each charged component uses an electrical circuit of two wires to achieve power supply. However, as the fuel cell system adopts a more compact design to save space and the continuous increase of the system control part, the design of the two-wire system power supply will make the connection of the charged components in the fuel cell system occupy a large space and the layout is crowded. At the same time, the connection method of the two-wire system power supply is also prone to faults such as short circuits, open circuits, and interference. Summary of the Utility Model

[0004] The utility model overcomes the existing defects and provides a fuel cell system based on a single-wire system. The utility model adopts a single-wire system for power supply, and uses the fuel cell system housing as a part of the power supply circuit, which can greatly reduce the consumption of wire materials and wiring costs of the system, saving nearly 50% of the cable materials; and reducing the use of wires also correspondingly reduces the risk of faults such as short circuits and open circuits in the circuit.

[0005] Adopting the single-wire system for power supply can reduce the space occupied by the wiring harness, save system space, and is beneficial to increasing the usable space of the fuel cell system in the same vehicle model space.

[0006] Adopting the single-wire system for power supply and the negative pole grounding method, after being energized, continuous electrons are connected to the vehicle frame through the metal housing of the fuel cell system, just like an anti-oxidation layer is attached to the surface of these metals, making these housing materials less likely to lose electrons and be oxidized, thereby improving the corrosion resistance of the fuel cell system structure and ensuring the continuity of its strength.

[0007] The technical solution of the utility model is as follows.

[0008] A fuel cell system based on a single-wire system, the fuel cell system uses a metal housing, one or more charged components are arranged inside the fuel cell system, the charged components are connected by a single wire, the positive pole of the charged component is connected to the vehicle or the test bench, and the negative pole is connected to the metal housing.

[0009] In the present utility model, the above-mentioned live components include one or more of a TBOX intelligent vehicle-mounted terminal, a hydrogen pump controller valve, a DCDC controller, a three-way valve, a water pump controller, an FCU or a throttle valve.

[0010] In the present utility model, the live components are connected in parallel.

[0011] In the present utility model, the metal housing is connected to the negative pole of the whole vehicle or the negative pole of the test bench.

[0012] In the present utility model, the fuel cell system is a metal housing. After being connected to one polarity, this housing will become a shielding cover, which can effectively shield external interference signals, is beneficial to the stability of the voltage inspection work inside the system, and reduces interference.

[0013] The present utility model adopts a single-wire system design for the fuel cell system, aiming to reduce the wiring harness of the fuel cell system, reduce the space occupied by the connection of the live components of the fuel cell system, and optimize the layout of the fuel cell system. After verification by the applicant, adopting the single-wire system can reduce the probability of short-circuit and open-circuit faults in the fuel cell system, at the same time optimize the layout of the fuel cell system, reduce the usage amount of wire materials in the fuel cell system, and reduce the wiring cost. Adopting the method of grounding the negative pole of the fuel cell system housing reduces the interference of voltage inspection inside the system; avoids potential safety hazards during the operation of the system and improves safety.

[0014] Compared with the prior art, the advantages of the present utility model are as follows:

[0015] 1. By a design method and implementation method based on the single-wire system of the fuel cell system, solve the problems of complex wiring of the fuel cell system body, large occupied space for connection, crowded layout, and easy occurrence of faults.

[0016] 2. Electrical design principle of the fuel cell system based on the single-wire system;

[0017] 3. Electrical design method of the fuel cell system based on the single-wire system;

[0018] 4. Electrical layout method of the fuel cell system based on the single-wire system;

[0019] 5. Electrical drawing method based on the electrical design of the fuel cell system with a single-wire system. Brief Description of the Drawings

[0020] Figure 1 is the electrical schematic diagram of the present utility model;

[0021] Figure 2 is the basic power supply circuit diagram of the present utility model;

[0022] Figure 3Schematic diagram of component wiring for the present utility model Figure 1 (Front view);

[0023] Figure 4 Schematic diagram of component wiring for the present utility model Figure 2 (Side view);

[0024] Figure 5 Schematic diagram of component wiring for the present utility model Figure 3 (Rear view);

[0025] Figure 6 It is a wiring harness design diagram.

[0026] Each component in the figure is as follows: TBOX1, hydrogen pump control valve 2, DCDC controller 3, three-way valve 4, water pump controller 5, FCU6, throttle valve 7. Specific implementation method

[0027] A fuel cell system based on a single-wire system for the present utility model, the basic electrical design process is as Figures 1 to 6 shown. A fuel cell system based on a single-wire system, the fuel cell system uses a metal housing, and there is more than one charged component inside the fuel cell system. The charged components are connected by a single wire. The positive pole of the charged component is connected to the vehicle or test bench, and the negative pole is connected to the metal housing. The metal housing is connected to the negative pole of the vehicle or the negative pole of the test bench. As Figures 1 to 5 shown, in this embodiment, the charged components are TBOX (1), hydrogen pump controller valve (2), DCDC controller (3), three-way valve (4), water pump controller (5), FCU (6) and throttle valve (7), and the charged components are connected in parallel.

[0028] The following further describes the present utility model with reference to the accompanying drawings. As Figure 1 shown, for the single-wire fuel cell system, the low-voltage power supply is provided by the vehicle or test bench e (24V). Among them, the negative pole of the power supply is grounded near the fuel cell system housing, and the rest of the charged BOP low-voltage power supply of the fuel cell system is supplied by it. For example, the positive poles of the power supplies for FCU, DCDC control, hydrogen pump control, DCL control, etc. are all supplied by e (24V). Among them, the negative pole of the power supply for the charged BOP of the fuel cell system is grounded near the housing, forming a closed loop with it, so as to perform low-voltage power supply.

[0029] The specific basic power supply circuit, as Figure 2 shown, is supplied by the vehicle or test bench e (24V), and FCU, DCDC control, hydrogen pump control, DCL control, etc. form a parallel circuit.

[0030] Based on the above electrical design of the fuel cell system with a single-wire system, the wiring harness layout of the fuel cell system is carried out. The negative power supply of the fuel cell system BOP (the auxiliary system of the fuel cell system, which is the key to maintaining the continuous, stable and safe operation of the fuel cell stack) is grounded near the housing. As Figures 3 to 5 shown, the power supply components can be grounded near the housing of the fuel cell system. By unifying the design of the required 24V power supply components, the thickness of the main wiring harness of the fuel cell system can be reduced, and the usage amount of wire materials and wiring cost of the system can be greatly reduced.

[0031] Based on the above electrical design of the fuel cell system with a single-wire system, the wiring harness design is carried out. As Figure 6 shown, the grounding of the power supply battery of the fuel cell system is designed in sequence, and the negative power supply of the remaining fuel cell system with live BOP is grounded. By carrying out the grounding design, the design method of this utility model can be completed. Subsequent normal power-on debugging can be carried out.

Claims

1. A fuel cell system based on a single-wire system, characterized in that The fuel cell system adopts a metal housing. There is more than one charged component inside the fuel cell system. The charged components are connected by a single wire. The positive electrode of the charged component is connected to the vehicle or test bench, and the negative electrode is connected to the metal housing.

2. The fuel cell system based on a single-wire system according to claim 1, characterized in that The charged components include one or more of TBOX (1), hydrogen pump controller valve (2), DCDC controller (3), three-way valve (4), water pump controller (5), FCU (6) or throttle valve (7).

3. The fuel cell system based on a single-wire system according to claim 1, characterized in that, The charged components are connected in parallel.

4. The fuel cell system based on a single-wire system according to claim 1, wherein, The metal housing is connected to the negative electrode of the vehicle or the negative electrode of the test bench.

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