Electrical circuit device of hydrogen fuel cell cogeneration system
By designing the electrical circuit device of the hydrogen fuel cell co-heating and power supply system, using 24V batteries, high-voltage lithium batteries and logic control units, the power supply of electricity is achieved independently when the system is not working, and the problem of power supply of container systems is solved.
Patent Information
- Application Number
- CN202421683744.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-17
- Publication Date
- 2025-03-04
- Estimated Expiration
- 2034-07-17
AI Technical Summary
The independent container hydrogen fuel cell co-heating and power supply system cannot withdraw power from the power grid when it is not working, resulting in internal auxiliary equipment such as lighting, exhaust, smoke and hydrogen leakage detection that need to rely on itself to provide electricity to maintain.
An electrical circuit device for the combined heat and power supply system of hydrogen fuel cell is designed, including a 24V battery, a high-voltage lithium battery, a hydrogen fuel cell system and a logic control unit, and the independent maintenance and switching of electrical energy is achieved through interlock switches and inverters.
When the hydrogen fuel cell co-heating and power supply system is not working, it can provide itself with electricity to maintain the operation of internal auxiliary equipment, avoiding dependence on the user's power grid, and meeting the basic electrical energy needs in the downtime.
Smart Images
Figure CN222563561U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of fuel cell systems, in particular to an electrical circuit device of a hydrogen fuel cell cogeneration system. Background Art
[0002] With the rapid development of hydrogen energy, the application of hydrogen fuel cell vehicle power systems to stationary hydrogen power generation systems and hydrogen cogeneration systems has also been carried out accordingly. The hydrogen fuel cell cogeneration system uses hydrogen as fuel and converts hydrogen energy into electricity and heat energy for users. In the actual process, the electricity and heat energy generated by hydrogen are settled to customers at a specific price. The electricity output by the hydrogen fuel cell cogeneration system is used in parallel with the user's power grid as a supplement to electricity. When the hydrogen fuel cell cogeneration system is needed to provide electricity, the hydrogen fuel cell cogeneration system is used first to provide electricity. When the hydrogen fuel cell cogeneration system is not needed to provide electricity, the user uses the electricity in the power grid. This greatly satisfies the user's use of diverse application scenarios.
[0003] For an independent containerized hydrogen fuel cell cogeneration system, there are auxiliary equipment such as lighting, exhaust, smoke and hydrogen leakage detection inside, which require uninterrupted power to maintain operation. Therefore, the problem that must be solved is that when the hydrogen fuel cell cogeneration system is not working, it cannot draw electricity from the grid users, and the power of the auxiliary equipment in the container needs to be provided by itself. For this reason, this application proposes an electrical circuit device for a hydrogen fuel cell cogeneration system to meet the needs of users. 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 a hydrogen fuel cell cogeneration system, 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 a hydrogen fuel cell cogeneration system comprises a 24V battery, a high-voltage lithium battery, a hydrogen fuel cell system, and a logic control unit, wherein the 24V battery is respectively connected to an inverter, a step-down DC and a container auxiliary equipment load, an interlocking switch S1 is provided between the 24V battery and the inverter, the inverter is respectively connected to the container AC load and the user load, an interlocking switch S2 is provided between the inverter and the user load, the step-down DC is respectively connected to the high-voltage lithium battery, the hydrogen fuel cell system and a detection switch, the detection switch is connected in series with a high-power inverter, and the high-power inverter is connected to the user load, wherein the logic control unit is respectively electrically connected to the detection switch, the interlocking switch S1 and the interlocking switch S2.
[0007] On the basis of the above technical solution, the interlock switch S1 and the interlock switch S2 are interlocked, and an electronic or mechanical interlocking device is used. In the present application, the interlock switch S1 and the interlock switch S2 are interlocked to maintain different fast-closing states, and when the interlock switch S1 is closed, the interlock switch S2 is opened, and when the interlock switch S1 is opened, the interlock switch S2 is closed.
[0008] On the basis of the above technical solution, the container auxiliary equipment load includes a smoke sensor, a hydrogen leakage sensor, a warning light and a controller.
[0009] On the basis of the above technical solution, the container AC load includes a lighting lamp and an exhaust fan inside the container.
[0010] On the basis of the above technical solution, the user load is also connected in parallel with the power grid, which is connected to the interlocking switch S2 and the high-power inverter. The power grid can supply energy to the user load, 24v battery, container auxiliary power supply equipment and container AC load.
[0011] On the basis of the above technical solution, the 24V battery is a lead-acid energy storage battery or a lithium-ion energy storage battery or a sodium-ion energy storage battery. Under the premise of controllable cost, in this application, the larger the capacity of the 24V battery, the better, and the larger the capacity of the high-voltage lithium battery, the better. Correspondingly, when the fuel cell system does not work for a long time, the longer the shutdown time of the electrical circuit device of the hydrogen fuel cell cogeneration system is, the better.
[0012] Compared with the prior art, the advantages of the utility model are:
[0013] Compared with the prior art, the electrical circuit device of the hydrogen fuel cell cogeneration system in the utility model is aimed at the hydrogen fuel cell cogeneration container. When the hydrogen fuel cell cogeneration system is not working, it can provide electricity for maintaining internal lighting, exhaust, smoke and hydrogen leakage detection and other auxiliary equipment by itself, without drawing electricity from the user's power grid, to meet the basic electricity needs in the shutdown state. BRIEF DESCRIPTION OF THE DRAWINGS
[0014] Figure 1 This is a structural schematic diagram of an electrical circuit device of a hydrogen fuel cell cogeneration system in an embodiment of the utility model;
[0015] Figure 2 It is a structural schematic diagram of an electrical circuit device of a hydrogen fuel cell cogeneration system in an embodiment of the utility model. DETAILED DESCRIPTION
[0016] The embodiments of the present invention are further described in detail below in conjunction with the accompanying drawings.
[0017] In the description of the present application, it should be noted that, unless otherwise clearly 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 directly connected, or indirectly connected through an intermediate medium, or it can be the internal communication of two elements. For ordinary technicians in this field, 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 including a series of elements includes not only those elements, but also other elements that are not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "including one..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.
[0018] See also Figure 1 The structure diagram of an electrical circuit device of a hydrogen fuel cell cogeneration system in an embodiment of the utility model is shown, and an electrical circuit device of a container-type hydrogen fuel cell cogeneration system includes a 24V battery, interlock switches S1, S2, an inverter, a step-down DC, a high-voltage lithium battery, and a hydrogen fuel cell cogeneration system including at least one 120kW hydrogen fuel cell thermal system, a high-power inverter, and a 24V equipment power load and an AC load in the container. Among them, the 24V battery and the step-down DC form a 24V low-voltage power supply, which is mainly used for powering the 24V low-voltage power supply in the container. The hydrogen fuel cell system mainly provides power for the hydrogen fuel cell cogeneration system, and the high-power inverter is used to convert high-voltage direct current into three-phase alternating current for user loads. Interlock switches S1, S2 and the inverter form a group of power supplies for container AC loads. And the logic control unit of the control circuit is electrically connected to the interlock switches S1, S2 and the detection switch respectively. The container AC load includes lighting, exhaust and other equipment inside the container, and the container 24V load includes smoke, hydrogen leakage sensors, warning lights, controllers, etc.
[0019] See also Figure 2 The schematic diagram of the structure of the electrical circuit device of a hydrogen fuel cell cogeneration system in the embodiment of the utility model is that the hydrogen fuel cell cogeneration system is in an intermittent working mode. For example, in an actual engineering project, the hydrogen fuel cell cogeneration system is preset to work for 16 hours and shut down for 8 hours in a day. When the hydrogen fuel cell cogeneration system is working, the detection switch monitors the working state of the circuit in real time, and the logic control unit controls the interlock switch S1 to be disconnected. At this time, the interlock switch S2, which is the same as the interlock switch S1, is closed, and the container AC load is powered by a high-power inverter.
[0020] When the hydrogen fuel cell cogeneration system is shut down, the detection switch detects that the circuit is not working, and the logic control unit controls the interlock switch S1 to close, and the interlock switch S2, which is interlocked with the interlock switch S1, is disconnected. At this time, the container AC load is powered by the 24V lithium battery through the inverter to provide power, so that it is used as the power of the container AC load, and the power of the power grid is completely isolated. Among them, when the 24V battery SOC is lower than the first set value, the high-voltage lithium battery is turned on, and the high-voltage lithium battery power is supplemented to the 24V battery and the container AC load by stepping down the DC. When the 24V battery SOC reaches the second set value, the high-voltage lithium battery stops working, and the container AC electronic load is provided with power by the 24V battery after conversion by the inverter.
[0021] The present invention is not limited to the above-mentioned embodiments. For ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principle of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention. The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.
Claims
1. An electrical circuit device for a hydrogen fuel cell cogeneration system, characterized in that: It includes a 24V battery, a high-voltage lithium battery, a hydrogen fuel cell system, and a logic control unit, wherein the 24V battery is respectively connected to an inverter, a step-down DC and a container auxiliary equipment load, an interlocking switch S1 is provided between the 24V battery and the inverter, the inverter is respectively connected to the container AC load and the user load, an interlocking switch S2 is provided between the inverter and the user load, the step-down DC is respectively connected to a high-voltage lithium battery, a hydrogen fuel cell system and a detection switch, the detection switch is connected in series with a high-power inverter, and the high-power inverter is connected to the user load, wherein the logic control unit is respectively electrically connected to the detection switch, the interlocking switch S1 and the interlocking switch S2.
2. The electrical circuit device of a hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The interlock switch S1 and the interlock switch S2 are interlocked and use an electronic or mechanical interlocking device.
3. The electrical circuit device of a hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The container auxiliary equipment load includes a smoke sensor, a hydrogen leakage sensor, a warning light and a controller.
4. The electrical circuit device of a hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The container AC load includes an internal lighting lamp and an internal exhaust fan.
5. The electrical circuit device of a hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The user load is also connected in parallel with a power grid, which connects an interlocking switch S2 and a high-power inverter.
6. The electrical circuit device of a hydrogen fuel cell cogeneration system according to claim 1, characterized in that: The 24V battery is a lead-acid energy storage battery, a lithium-ion energy storage battery, or a sodium-ion energy storage battery.