A fuel cell hydrogen over potential energy recovery device and fuel cell
By introducing MOSFETs, capacitors, inductors, and flyback and DC/DC circuits into the fuel cell system, the safety hazards and low energy utilization in the treatment of residual hydrogen in fuel cells are solved, achieving efficient energy recovery and extended battery life.
Patent Information
- Authority / Receiving Office
- CN ยท China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHENZHEN FREECOOL SCI & TECH
- Filing Date
- 2025-06-05
- Publication Date
- 2026-07-21
Smart Images
Figure CN224537075U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of fuel cell technology, and in particular to a fuel cell residual hydrogen energy recovery device and a fuel cell. Background Technology
[0002] During the operation of a fuel cell, excess hydrogen can be generated and accumulate due to various reasons (such as gas supply system malfunctions or incomplete electrochemical reactions). Hydrogen is a flammable and explosive gas. When hydrogen accumulates in a confined space to a certain concentration (the explosive limits of hydrogen are 4.0%-75.6%), it is highly susceptible to explosion upon contact with a source of ignition or energy (such as static electricity or electric sparks). Therefore, a residual hydrogen discharge device is needed to promptly dissipate the excess hydrogen and prevent the hydrogen concentration from reaching dangerous levels, thereby ensuring the safe operation of the fuel cell system.
[0003] Currently, the energy generated by hydrogen combustion is consumed using a resistive element. Excess hydrogen enters the device and mixes with air in the combustion chamber, releasing a large amount of heat. The high-temperature combustion gas is converted into electrical energy and applied to both ends of the resistor. The resistive element then converts the electrical energy back into heat energy, which is dissipated as heat, thus consuming the excess hydrogen.
[0004] This method has relatively low energy utilization, and the discharge usually takes more than 2 minutes, which is very slow. Utility Model Content
[0005] The main purpose of this invention is to propose a fuel cell residual hydrogen energy recovery device and fuel cell that can efficiently process residual hydrogen, recover part of the energy, and is stable and reliable. It aims to solve the problems of safety hazards, low energy utilization rate and high maintenance cost of existing fuel cell residual hydrogen treatment methods.
[0006] To achieve the above objectives, this utility model provides a fuel cell residual hydrogen energy recovery device, comprising a flyback circuit consisting of a MOSFET Q1, a diode D1, a capacitor C2, an inductor T1, a control circuit, and a low-voltage power supply battery. Pin 1 of the inductor T1 is connected to the positive terminal of a high-voltage power supply V; pin 2 of the inductor T1 is connected to the drain of the MOSFET Q1; the source of the MOSFET Q1 is connected to the negative terminal of the high-voltage power supply V; the gate of the MOSFET Q1 is connected to the control circuit; pin 3 of the inductor T1 is connected to the anode of the diode D1; the cathode of the diode D1 is connected to one end of the capacitor C2 and one end of the low-voltage power supply battery; and pin 4 of the inductor T1 is connected to the other end of the capacitor C2 and the other end of the low-voltage power supply battery.
[0007] A further technical solution of this utility model is that it also includes a DC / DC circuit, wherein pin 1 of the DC / DC circuit is connected to the positive terminal of the high-voltage power supply V, pin 2 of the DC / DC circuit is connected to the negative terminal of the high-voltage power supply V, pin 3 of the DC / DC circuit is connected to the other end of the low-voltage power supply battery, and pin 4 of the DC / DC circuit is connected to one end of the low-voltage power supply battery.
[0008] A further technical solution of this utility model is that it also includes a capacitor C1, one end of which is connected to the positive terminal of the high-voltage power supply V, and the other end of which is connected to the negative terminal of the high-voltage power supply V.
[0009] To achieve the above objectives, this utility model also proposes a fuel cell, which includes the fuel cell residual hydrogen energy recovery device described above.
[0010] The beneficial effects of this utility model of fuel cell residual hydrogen energy recovery device and fuel cell are:
[0011] This invention can reduce the utilization rate of the battery in the system, replenish the battery in a timely manner, extend the battery's service life, release the remaining hydrogen energy of the fuel cell after the system is powered off, discharge faster, and the energy can be recovered back into the system, thus improving the utilization rate of hydrogen energy. Attached Figure Description
[0012] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.
[0013] Figure 1 This is a circuit diagram of a preferred embodiment of the fuel cell residual hydrogen energy recovery device of this utility model.
[0014] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation
[0015] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0016] This invention proposes a fuel cell residual hydrogen energy recovery device. Primarily applied in the field of fuel cell systems, this device treats excess hydrogen generated during fuel cell operation, ensuring safe and stable system operation. It can be installed in various fuel cell applications, such as fuel cell vehicles, stationary fuel cell power stations, and portable fuel cell power supplies, to effectively treat residual hydrogen and recover its energy.
[0017] like Figure 1 As shown, a preferred embodiment of the fuel cell residual hydrogen energy recovery device of this utility model includes a flyback circuit composed of a MOSFET Q1, a diode D1, a capacitor C2, an inductor T1, a control circuit, and a low-voltage power supply battery. Pin 1 of the inductor T1 is connected to the positive terminal of the high-voltage power supply V; pin 2 of the inductor T1 is connected to the drain of the MOSFET Q1; the source of the MOSFET Q1 is connected to the negative terminal of the high-voltage power supply V; the gate of the MOSFET Q1 is connected to the control circuit; pin 3 of the inductor T1 is connected to the anode of the diode D1; the cathode of the diode D1 is connected to one end of the capacitor C2 and one end of the low-voltage power supply battery; and pin 4 of the inductor T1 is connected to the other end of the capacitor C2 and the other end of the low-voltage power supply battery.
[0018] In this embodiment, when the fuel cell system is operating normally, the high-voltage power supply V charges the low-voltage battery through the flyback circuit and supplies the corresponding load energy to the battery. In this way, the low-voltage battery will not suffer energy loss, and its lifespan will be improved. After the fuel cell system is shut down, the flyback circuit continues to operate. The electrical energy V generated by the remaining hydrogen in the fuel cell system is recovered into the low-voltage battery through the flyback circuit, which accelerates the discharge rate of the remaining hydrogen and recovers the excess hydrogen energy for future use. The flyback circuit is then turned off when the fuel cell system voltage V drops to the required voltage.
[0019] Furthermore, in this embodiment, the fuel cell residual hydrogen energy recovery device also includes a DC / DC circuit, wherein pin 1 of the DC / DC circuit is connected to the positive terminal of the high-voltage power supply V, pin 2 of the DC / DC circuit is connected to the negative terminal of the high-voltage power supply V, pin 3 of the DC / DC circuit is connected to the other end of the low-voltage power supply battery, and pin 4 of the DC / DC circuit is connected to one end of the low-voltage power supply battery.
[0020] Furthermore, in this embodiment, the fuel cell residual hydrogen energy recovery device also includes a capacitor C1, one end of which is connected to the positive terminal of the high-voltage power supply V, and the other end of which is connected to the negative terminal of the high-voltage power supply V.
[0021] The beneficial effects of this utility model's fuel cell residual hydrogen energy recovery device are:
[0022] This invention can reduce the utilization rate of the battery in the system, replenish the battery in a timely manner, extend the battery's service life, release the remaining hydrogen energy of the fuel cell after the system is powered off, discharge faster, and the energy can be recovered back into the system, thus improving the utilization rate of hydrogen energy.
[0023] To achieve the above objectives, this utility model also proposes a fuel cell, which includes the fuel cell residual hydrogen energy recovery device as described in the above embodiment. The structure and working principle of the fuel cell residual hydrogen energy recovery device have been described in detail above and will not be repeated here.
[0024] The above description is only a preferred embodiment of the present utility model and does not limit the patent scope of the present utility model. All equivalent structural transformations made under the concept of the present utility model and using the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included in the patent protection scope of the present utility model.
Claims
1. A fuel cell residual hydrogen energy recovery device, characterized in that, The circuit includes a flyback circuit consisting of a MOSFET Q1, a diode D1, a capacitor C2, an inductor T1, a control circuit, and a low-voltage power supply battery. Pin 1 of the inductor T1 is connected to the positive terminal of the high-voltage power supply V. Pin 2 of the inductor T1 is connected to the drain of the MOSFET Q1. The source of the MOSFET Q1 is connected to the negative terminal of the high-voltage power supply V. The gate of the MOSFET Q1 is connected to the control circuit. Pin 3 of the inductor T1 is connected to the anode of the diode D1. The cathode of the diode D1 is connected to one end of the capacitor C2 and one end of the low-voltage power supply battery. Pin 4 of the inductor T1 is connected to the other end of the capacitor C2 and the other end of the low-voltage power supply battery.
2. The fuel cell residual hydrogen energy recovery device according to claim 1, characterized in that, It also includes a DC / DC circuit, wherein pin 1 of the DC / DC circuit is connected to the positive terminal of the high-voltage power supply V, pin 2 of the DC / DC circuit is connected to the negative terminal of the high-voltage power supply V, pin 3 of the DC / DC circuit is connected to the other end of the low-voltage power supply battery, and pin 4 of the DC / DC circuit is connected to one end of the low-voltage power supply battery.
3. The fuel cell residual hydrogen energy recovery device according to claim 2, characterized in that, It also includes a capacitor C1, one end of which is connected to the positive terminal of the high-voltage power supply V, and the other end of which is connected to the negative terminal of the high-voltage power supply V.
4. A fuel cell, characterized in that, The fuel cell includes a fuel cell residual hydrogen energy recovery device as described in any one of claims 1 to 3.