Electrical circuit device of self-powered hydrogen fuel cell system test board
By using the electrical circuit of the autonomously powered hydrogen fuel cell system test bench and utilizing the electricity generated by the hydrogen fuel cell to power auxiliary equipment, the problem of traditional testing methods relying on external power supplies is resolved, thus achieving an efficient and low-cost testing environment.
Patent Information
- Application Number
- CN202422329216.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-24
- Publication Date
- 2025-09-19
- Estimated Expiration
- 2034-09-24
AI Technical Summary
Traditional hydrogen fuel cell system testing requires additional high-voltage DC and low-voltage DC power supplies to drive auxiliary equipment, increasing operating costs and the complexity of the test environment.
An electrical circuit for an autonomously powered hydrogen fuel cell system test bench is designed. The electricity generated by the hydrogen fuel cell is used to power the auxiliary equipment under test. By optimizing the circuit through DC/DC converters and relays, autonomous energy management and feedback are achieved, reducing dependence on external power supplies.
It simplifies the test bench architecture, reduces operating costs, improves test efficiency and convenience, meets the diverse power supply requirements for auxiliary equipment, and reduces energy waste.
Smart Images
Figure CN223362241U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cell system testing, in particular to an electrical circuit device of a self-powered hydrogen fuel cell system testing bench. Background Art
[0002] With the growing global demand for low-carbon energy solutions, hydrogen fuel cells are considered an ideal alternative to traditional fossil fuels due to their zero emissions, high efficiency, and rapid refueling. Test benches play a vital role in the research, development, and industrialization of hydrogen fuel cell technology. With the continuous advancement of hydrogen fuel cell technology, the performance requirements of its test benches are also continuously upgraded. Traditional testing methods rely on additional high-voltage direct current (HVDC) and low-voltage direct current (LVDC) power supplies to drive auxiliary equipment such as air compressors and water pumps when starting hydrogen fuel cell systems. This not only increases operating costs but also increases the complexity of test environment construction.
[0003] In order to solve the above technical problems, the present application proposes an electrical circuit device for an autonomously powered hydrogen fuel cell system test bench. Summary of the Invention
[0004] In view of the defects existing in the prior art, the purpose of the present invention is to provide an electrical circuit device for an autonomously powered hydrogen fuel cell system test bench, aiming to solve the technical problems in the related art to a certain extent.
[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is:
[0006] An electrical circuit device of an autonomously powered hydrogen fuel cell system test bench is provided, which is respectively provided with a hydrogen fuel cell system under test and auxiliary equipment of the system under test. The hydrogen fuel cell system under test is respectively connected to an energy feedback electronic load and an energy storage battery. The auxiliary equipment of the system under test is connected to the energy storage battery via a first DC / DC converter. The output end of the hydrogen fuel cell system under test is connected to the energy storage battery via a second DC / DC converter. The output end of the hydrogen fuel cell system under test is provided with a current sensor A1 and a voltage sensor V, which are used to measure the output current and output voltage of the hydrogen fuel cell system under test, respectively. Relays K1 and K2 are provided between the hydrogen fuel cell system under test and the energy feedback electronic load. Relay K3 is provided between relay K1 and the second DC / DC converter. Relay K4 is provided between the first DC / DC converter and the energy storage battery. Relay K5 is provided between the second DC / DC converter and the energy storage battery.
[0007] On the basis of the above technical solution, a current sensor A2 is provided between the second DC / DC converter and the hydrogen fuel cell system to be tested.
[0008] On the basis of the above technical solution, the relay K4 is interlocked with the relay K3 and the relay K5, and the relay K3 and the relay K5 are in synchronous associated connection.
[0009] On the basis of the above technical solution, the relays K1, K2, K3, K4 and K5 are electromagnetic relays, current relays or voltage relays, or a combination of the two.
[0010] On the basis of the above technical solution, the energy feedback electronic load is connected to the 380V / AC mains power grid, and the energy feedback electronic load is used to feed energy back to the grid.
[0011] On the basis of the above technical solution, the second DC / DC converter is adapted to the parameters of the output voltage of the hydrogen fuel cell system and the voltage of the energy storage battery under test.
[0012] On the basis of the above technical solution, the first DC / DC converter can output 12V, 24V, 48V DC voltages and adapt to the voltage parameters of the energy storage battery.
[0013] On the basis of the above technical solution, the energy storage battery is a lithium-ion battery or a lead-acid battery or a constant voltage power supply device.
[0014] Compared with the prior art, the advantages of the present invention are:
[0015] (1) Compared with the existing technology, the electrical circuit device of the self-powered hydrogen fuel cell system test bench in this utility model can directly use the electricity generated by the hydrogen fuel cell to power the auxiliary equipment under test by optimizing the electrical circuit design, thereby eliminating the need for an external power supply. This design not only simplifies the test bench architecture and reduces operating costs, but also improves testing efficiency and convenience, better meeting the current research, development and testing needs of hydrogen fuel cell systems.
[0016] (2) The electrical circuit device of the self-powered hydrogen fuel cell system test bench in the present invention realizes the diversity of the auxiliary power requirements of the hydrogen fuel cell system under test through an efficient energy management and conversion mechanism, and further reduces energy waste by reducing dependence on external power supplies. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 This is a structural schematic diagram of an electrical circuit device of an autonomously powered hydrogen fuel cell system test bench in an embodiment of the present utility model. DETAILED DESCRIPTION
[0018] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.
[0019] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.
[0020] In the description of this application, it should also be noted that, unless otherwise expressly specified and limited, the terms "set", "install", "connect", and "connect" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to the specific circumstances. Moreover, the terms "include", "comprise", or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article, or device that includes a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements that are inherent to such process, method, article, or device. In the absence of further restrictions, the elements defined by the sentence "including a..." do not exclude the presence of other identical elements in the process, method, article, or device that includes the elements.
[0021] See also Figure 1 The figure shows a schematic structural diagram of an electrical circuit device of an autonomously powered hydrogen fuel cell system test bench in an embodiment of the present invention, including a hydrogen fuel cell system under test, auxiliary equipment of the system under test, an energy feedback electronic load and an energy storage battery. The auxiliary equipment of the system under test is connected to the energy storage battery via a first DC / DC converter, and the output end of the hydrogen fuel cell system under test is connected to the energy storage battery via a second DC / DC converter. The output end of the hydrogen fuel cell system under test is provided with a current sensor A1 and a voltage sensor V, which are used to measure the output current and output voltage of the hydrogen fuel cell system under test, respectively. Relays K1 and K2 are provided between the hydrogen fuel cell system under test and the energy feedback electronic load, a relay K3 is provided between relay K1 and the second DC / DC converter, a relay K4 is provided between the first DC / DC converter and the energy storage battery, and a relay K5 is provided between the second DC / DC converter and the energy storage battery.
[0022] The hydrogen fuel cell system under test in this embodiment is a device that converts the electrochemical reaction of hydrogen and oxygen into electrical energy, and the auxiliary equipment of the system under test includes auxiliary equipment that consumes electricity, such as air compressors and water pumps. In this application, the energy feedback electronic load controls the on-off state of the switch tube, and finally converts the direct current into alternating current and sends it back to the power grid through rectification, filtering and inversion of the input power supply. The device can realize bidirectional energy circulation, which can consume electrical energy and feed electrical energy back to the power grid. Therefore, the energy feedback electronic load in this embodiment is essentially a DC / AC converter that converts direct current into alternating current and sends the electrical energy into the mains power grid. The energy storage battery is an energy buffer device that provides starting energy for the system test bench or the hydrogen fuel cell system under test and absorbs excess electrical energy.
[0023] In this embodiment, two DC / DC converters are provided. The first DC / DC converter converts the electrical energy from the hydrogen fuel cell system circuit under test into direct current that can be used by the auxiliary equipment of the system under test, such as high voltage 550V / DC, low voltage 48V / DC, 24V / DC, 12V / DC, etc.; the second DC / DC converter converts the main voltage into a suitable voltage for charging the energy storage battery through the DC / DC converter when the main voltage does not match the voltage level of the energy storage battery.
[0024] Since the hydrogen fuel cell systems under test include those with and without a boost DC converter, and therefore have voltage levels of around 550V / DC and 100-300V / DC respectively, the logic control unit first detects the voltage status of the hydrogen fuel cell system under test using a voltage sensor, and then controls the closing or opening status of interlock relays K4, K3, and K5.
[0025] When the logic control unit detects a high voltage (approximately 550V in this embodiment), it controls interlock relay K4 to close, relays K3 and K5 to open, and then closes relay K1. The energy storage battery power can be directly supplied via the busbar to the hydrogen fuel cell system under test for startup, or replaced via the first DC / DC converter to supply power to auxiliary equipment in the system under test. When the energy storage battery charge is low, a portion of the power generated by the hydrogen fuel cell system under test is diverted to charge the energy storage battery. When the energy storage battery charge is full, the power generated by the hydrogen fuel cell system under test is fully received by the energy feedback electronic load.
[0026] When the logic control unit detects a low voltage (set to 100-300V in this embodiment), it controls interlock relay K4 to open, K3 and K5 to close, and then closes relay K1. The power required to start the hydrogen fuel cell system under test is converted and obtained by the second DC / DC converter, or the auxiliary equipment of the system under test obtains the power through two-stage energy conversion through the second DC / DC converter and the first DC / DC converter. At this time, the starting power is still provided by the energy storage battery. When the energy storage battery is low in power, the power generated by the hydrogen fuel cell system under test is diverted through the second DC / DC converter to partially divert the power consumed by the energy feedback electronic load to charge the energy storage battery. When the energy storage battery is fully charged, the energy feedback electronic load obtains all the power generated by the hydrogen fuel cell system under test.
[0027] The present invention is not limited to the above-described embodiments. Persons skilled in the art may make various improvements and modifications without departing from the principles of the present invention, and such improvements and modifications are considered to be within the scope of protection of the present invention. Any matters not described in detail in this specification are prior art known to those skilled in the art.
Claims
1. An electrical circuit device for a self-powered hydrogen fuel cell system test bench, each equipped with a hydrogen fuel cell system under test and auxiliary equipment for the system under test, characterized in that: The hydrogen fuel cell system under test is respectively connected to an energy feedback electronic load and an energy storage battery. The auxiliary equipment of the system under test is connected to the energy storage battery through a first DC / DC converter. The output end of the hydrogen fuel cell system under test is connected to the energy storage battery through a second DC / DC converter. The output end of the hydrogen fuel cell system under test is provided with a current sensor A1 and a voltage sensor V. The current sensor A1 and the voltage sensor V are used to measure the output current and output voltage of the hydrogen fuel cell system under test, respectively. Relays K1 and K2 are provided between the hydrogen fuel cell system under test and the energy feedback electronic load. Relay K3 is provided between relay K1 and the second DC / DC converter. Relay K4 is provided between the first DC / DC converter and the energy storage battery. Relay K5 is provided between the second DC / DC converter and the energy storage battery.
2. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: A current sensor A2 is provided between the second DC / DC converter and the hydrogen fuel cell system under test.
3. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The relay K4 is interlocked with the relay K3 and the relay K5, and the relay K3 and the relay K5 are in synchronous association connection.
4. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The relays K1, K2, K3, K4 and K5 are electromagnetic relays, current relays or voltage relays, or a combination of the two.
5. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The energy feedback electronic load is connected to a 380V / AC mains power grid, and is used to feed energy back to the grid.
6. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The second DC / DC converter is adapted to the parameters of the output voltage of the hydrogen fuel cell system and the voltage of the energy storage battery under test.
7. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The first DC / DC converter can output 12V, 24V, 48V DC voltages and is adapted to the voltage parameters of the energy storage battery.
8. The electrical circuit device of the self-powered hydrogen fuel cell system test bench according to claim 1, characterized in that: The energy storage battery is a lithium-ion battery or a lead-acid battery.