Modular hybrid energy storage and energy conversion multi-power universal interface

Abstract

The application discloses a modular mixed energy storage and energy conversion multi-power universal interface, which comprises an interface main body and first, second, third, fourth, fifth, sixth, seventh, eighth and ninth interfaces integrated on the interface main body; the interfaces are used for connecting with lithium battery, hydrogen fuel cell, photovoltaic cell, hydrogen storage bag, electrolytic tank and other components. The interface has high integration degree, and the connection of the photovoltaic cell, lithium battery, hydrogen fuel cell and electrolytic tank is integrated; the device has low energy storage cost, simple operation and maintenance, good energy storage medium expansion performance, and the energy storage medium and working mode can be freely combined.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of energy storage engineering, and relates to a modular mixed energy storage and energy conversion multi-power universal interface comprising a photovoltaic cell, a lithium battery, a hydrogen fuel cell and an electrolytic tank. BACKGROUND

[0002] In the vast rural areas of the western part of China, near islands, and border posts, the population density is very low. From the perspective of natural geographical conditions, if these areas are all covered by power grids, there are disadvantages such as long transmission distance, high transmission cost, large power loss, and particularly high construction and maintenance cost.

[0003] In order to solve the above problems, it is the best solution to make full use of local energy and resources. In the traditional "photovoltaic-battery" scheme, only a single medium of a storage battery is used for energy storage, which has the disadvantages of high energy storage cost, and the storage battery works in a harsh environment and needs to be frequently maintained and replaced. Moreover, photovoltaic energy storage is greatly restricted by natural conditions, and has many uncertain factors, which makes the energy supply unstable.

[0004] Therefore, as an alternative solution, mixed energy storage and energy conversion can significantly improve the stability of energy storage and energy supply. The existing mixed energy storage energy conversion has various energy storage modules that are independent of each other, poor integration, poor scalability, cannot be flexibly used in different working conditions, and high maintenance and replacement cost.

[0005] In addition, in the field of new energy teaching, various types of energy require independent equipment modules, and in the teaching of mixed energy, various types of energy need to be adaptively connected and matched. In the process of teaching different mixed energies, adaptive connection and debugging are required, and the entire preparation process is complex and tedious.

[0006] Therefore, it is necessary to develop a mixed energy storage universal interface that is simple to maintain and replace, has low energy storage cost, good scalability of energy storage medium, and free combination of energy storage medium and working mode. SUMMARY

[0007] Therefore, the present application provides a modular mixed energy storage and energy conversion multi-power universal interface, which has high integration and integrates the connection of photovoltaic cells, lithium batteries, hydrogen fuel cells and electrolytic tanks. The device has low energy storage cost, simple operation and maintenance, good scalability of energy storage medium, and free combination of energy storage medium and working mode.

[0008] The modular mixed energy storage and energy conversion multi-power universal interface of the present application comprises an interface main body and a first interface, a second interface, a third interface, a fourth interface, a fifth interface, a sixth interface, a seventh interface, an eighth interface and a ninth interface integrated on the interface main body.

[0009] The first interface is used for electrical connection with a load;

[0010] The second interface is used for electrical connection with a lithium battery;

[0011] The third interface is used for electrical connection with a hydrogen fuel cell;

[0012] The fourth interface is used for communication with an air inlet of the hydrogen fuel cell;

[0013] The fifth interface is used for electrical connection with a photovoltaic cell;

[0014] The sixth interface is used for communication with an air inlet of a hydrogen storage bag;

[0015] The seventh interface is used for communication with an air outlet of the hydrogen storage bag;

[0016] The eighth interface is used for electrical connection with an electrolytic cell;

[0017] The ninth interface is used for communication with an air outlet of the electrolytic cell;

[0018] The first interface is electrically connected with the second interface, the third interface and the fifth interface respectively;

[0019] The second interface is electrically connected with the third interface;

[0020] The fourth interface is in communication with the sixth interface and the seventh interface;

[0021] The fifth interface is electrically connected with the eighth interface;

[0022] The ninth interface is in communication with the sixth interface and the fourth interface.

[0023] Optionally, the universal interface further comprises a tenth interface and an eleventh interface, the tenth interface is used for connection with a water inlet of the electrolytic cell, and the eleventh interface is used for connection with a water outlet of a water tank, the eleventh interface being in communication with the tenth interface.

[0024] Optionally, the universal interface further comprises a voltage stabilizing module and a constant current module, the fifth interface is electrically connected with the eighth interface through the voltage stabilizing module, the fifth interface is electrically connected with the first interface in sequence through the voltage stabilizing module and the constant current module, the third interface is electrically connected with the first interface through the constant current module, and the third interface is electrically connected with the second interface through the constant current module.

[0025] Optionally, the universal interface further comprises a drying and water removing device, which is connected between the ninth interface and the sixth interface and between the ninth interface and the fourth interface, for drying the hydrogen gas entering the sixth interface and the fourth interface from the ninth interface.

[0026] Optionally, the drying and water removing device comprises a gravity water removing module, which is used for condensing the water vapor in the entering hydrogen gas.

[0027] Optionally, the drying and water removing device further comprises a concentrated sulfuric acid water absorbing module and a desiccant drying module, which are sequentially connected, the water inlet of the gravity water removing module is connected with the ninth interface, and the water outlet of the desiccant drying module is connected with the sixth interface; the concentrated sulfuric acid water absorbing module is provided with concentrated sulfuric acid for absorbing the water vapor in the hydrogen gas, and the desiccant drying module is provided with a desiccant for absorbing the water vapor in the hydrogen gas.

[0028] Optionally, the gravity water removing module comprises an upper box body and a lower box body, the upper end of the upper box body is a conical body gradually becoming smaller upwards, the gas outlet of the gravity water removing module is arranged at the upper end of the upper box body and connected with the gas inlet of the concentrated sulfuric acid water absorbing module, the gas inlet of the gravity water removing module is arranged at the side of the upper box body, and the lower box body is connected with the bottom of the lower box body.

[0029] Optionally, the universal interface further comprises a first electromagnetic valve, a second electromagnetic valve and a third electromagnetic valve, the first electromagnetic valve is connected between the gas outlet of the drying and water removing device and the sixth interface, the second electromagnetic valve is connected between the gas outlet of the drying and water removing device and the fourth interface, and the third electromagnetic valve is connected between the seventh interface and the fourth interface.

[0030] Optionally, the universal interface further comprises a control module, which is connected with the first electromagnetic valve, the second electromagnetic valve and the third electromagnetic valve to control the opening and closing of each electromagnetic valve.

[0031] The beneficial effects of the present application are as follows:

[0032] The structure has high integration degree and is easy to disassemble, so that replacement and maintenance are easy; the universal interface reserves multiple functional interfaces, and can be flexibly applied to various energy storage and energy utilization conditions, for example, can be applied to grid energy storage and energy utilization, and can also be applied to new energy vehicles and teaching of new energy vehicles; the universal interface can realize free combination of various energy batteries, is practical and flexible, can realize two-by-two combined hybrid energy storage, and is especially suitable for teaching field;

[0033] The application reserves various energy interfaces, for example, the lithium battery of a new energy vehicle can be regarded as part of the lithium battery in the application after the lithium battery of the new energy vehicle is connected with the device through the interface, and with the popularization of new energy vehicles, the practicability and application scenarios of the device are greatly enhanced.

[0034] The application places the high-cost photovoltaic panel, hydrogen fuel cell, lithium battery and electrolytic cell outside the interface device, and places the energy conversion and management facilities inside the interface device, realizes connection through the universal interface of the device, and makes maintenance, repair and replacement particularly simple, and the mode switching of various hybrid energy is relatively easy.

[0035] The application can realize the working mode of the lithium battery or the photovoltaic battery alone, the working mode of the lithium battery and the photovoltaic battery in combination, the working mode of the photovoltaic battery and the hydrogen fuel cell and the electrolytic cell in combination, and the working mode of the lithium battery, the hydrogen fuel cell, the photovoltaic battery and the electrolytic cell in combination, and the mode switching of various modes is relatively easy. BRIEF DESCRIPTION OF DRAWINGS

[0036] The application will be further described below in combination with the drawings and examples.

[0037] Figure 1 It is a structural schematic diagram of the application;

[0038] Figure 2 It is a schematic diagram of the interface connection structure of the application;

[0039] Figure 3 It is a structural schematic diagram of the drying and water removing device of the application. DETAILED DESCRIPTION

[0040] As shown in the drawing, Figure 1 a modular mixed energy storage and energy conversion multi-power universal interface in the embodiment is used for matching and plugging with the sockets of the photovoltaic battery, lithium battery, hydrogen fuel cell and electrolytic cell.

[0041] As shown in the drawing, Figures 1 to 3 the universal interface includes an interface body 100 and a first interface 101, a second interface 102, a third interface 103, a fourth interface 104, a fifth interface 105, a sixth interface 106, a seventh interface 107, an eighth interface 108, a ninth interface 109, a tenth interface 110 and an eleventh interface 111 integrated on the interface body 100;

[0042] The first interface 101 is used for electrical connection with a load;

[0043] The second interface 102 is used for electrical connection with a lithium battery;

[0044] The third interface 103 is used for electrical connection with a hydrogen fuel cell;

[0045] The fourth interface 104 is used for communicating with the gas inlet of the hydrogen fuel cell;

[0046] The fifth interface 105 is used for electrical connection with the photovoltaic cell;

[0047] The sixth interface 106 is used for communicating with the gas inlet of the hydrogen storage bag; the hydrogen storage bag is used for storing energy, has low cost compared with the steel cylinder, and has good scalability; the application can store energy in the mode of "small lithium battery + large hydrogen storage bag", the hydrogen storage bag is simple to disassemble, can be stored in batches, has much lower cost than the pure storage battery, and has better scalability.

[0048] The seventh interface 107 is used for communicating with the gas outlet of the hydrogen storage bag;

[0049] The eighth interface 108 is used for electrical connection with the electrolytic tank;

[0050] The ninth interface 109 is used for communicating with the gas outlet of the electrolytic tank;

[0051] The first interface 101 is electrically connected with the second interface 102, the third interface 103 and the fifth interface 105 respectively;

[0052] The second interface 102 is electrically connected with the third interface 103;

[0053] The fourth interface 104 communicates with the sixth interface 106 and the seventh interface 107;

[0054] The fifth interface 105 is electrically connected with the eighth interface 108;

[0055] The ninth interface 109 communicates with the sixth interface 106 and the fourth interface 104.

[0056] The tenth interface 110 is used for connecting with the water inlet of the electrolytic tank, and the eleventh interface 111 is used for connecting with the water outlet of the water tank, and the eleventh interface 111 communicates with the tenth interface 110.

[0057] Please refer to Figure 1 and Figure 2 , wherein the second interface 102 comprises a charging interface and a discharging interface of the lithium battery, the third interface 103 comprises a charging interface and a discharging interface of the hydrogen fuel cell, the fifth interface 105 comprises a charging interface and a discharging interface of the photovoltaic cell, and the eighth interface 108 comprises a power transmission interface and a discharging interface of the electrolytic tank; wherein the electrical connection modes of the power transmission interfaces and the discharging interfaces are existing modes, which will not be described herein.

[0058] In this embodiment, the second interface 102, the third interface 103, the fifth interface 105 and the eighth interface 108 all adopt the existing interface structure, which will not be described here.

[0059] Further, the universal interface further comprises a voltage stabilizing module 112 and a constant current module 113, the fifth interface 105 is electrically connected with the eighth interface 108 through the voltage stabilizing module 112, the fifth interface 105 is electrically connected with the first interface 101 through the voltage stabilizing module 112 and the constant current module 113 in sequence, the third interface 103 is electrically connected with the first interface 101 through the constant current module 113, and the third interface 103 is electrically connected with the second interface 102 through the constant current module 113.

[0060] The voltage stabilizing module 112 is used in cooperation with the photovoltaic cell to avoid voltage fluctuation caused by changes in light intensity and angle; the power of the photovoltaic cell can be delivered to the electrolytic cell through the fifth interface 105 and the eighth interface 108. The input of the constant current module 113 is derived from the output of the third interface 103 and the output of the voltage stabilizing module 112 generated by the hydrogen fuel cell, and the output of the constant current module directly acts on the load 101 or the lithium battery for charging the lithium battery.

[0061] Further, the universal interface further comprises a drying and water removal device, which is used to be connected between the ninth interface 109 and the sixth interface 106 and between the ninth interface 109 and the fourth interface 104, for drying the hydrogen gas introduced into the sixth interface 106 and the fourth interface 104 through the ninth interface 109. The drying and water removal device is used in cooperation with the electrolytic cell to dry the hydrogen gas generated by electrolysis of the electrolytic cell.

[0062] Please refer to Figure 3 As shown in the figure, the drying and water removal device comprises a gravity water removal module 114, a concentrated sulfuric acid water absorption module 115 and a desiccant drying module 116, which are communicated in sequence, the water inlet of the gravity water removal module 114 is communicated with the ninth interface 109, and the water outlet of the desiccant drying module 116 is communicated with the sixth interface 106; the gravity water removal module 114 is used to condense part of the water vapor in the introduced hydrogen gas; the concentrated sulfuric acid water absorption module 115 is provided with concentrated sulfuric acid for absorbing water vapor in the hydrogen gas, and the concentrated sulfuric acid refers to a sulfuric acid aqueous solution with a mass fraction greater than or equal to 70%; the desiccant drying module 116 is provided with a desiccant for absorbing water vapor in the hydrogen gas, and the desiccant can be a chemical desiccant such as calcium sulfate and calcium chloride, which dries by generating hydrate with water, or a physical desiccant such as silica gel and activated alumina, which dries by physically adsorbing water.

[0063] Please continue to refer to this. Figure 2 and Figure 3 As shown, the gravity dewatering module 114 includes an upper housing 1141 and a lower housing 1142. The upper end of the upper housing is a cone shape that gradually decreases in size upwards. The air outlet of the gravity dewatering module 114 is located at the upper end of the upper housing and is connected to the air inlet of the concentrated sulfuric acid water absorption module 115. The air inlet of the gravity dewatering module 114 is located on the side of the upper housing. The lower housing 1142 is connected to the bottom of the lower housing 1142.

[0064] The hydrogen gas electrolyzed in the electrolytic cell enters through the side of the upper chamber and exits through the top of the upper chamber 1141. The airflow impacts the conical structure at the top of the upper chamber, which helps to condense the water vapor in the hydrogen gas. The water flows to the lower chamber 1142 for storage due to gravity. The upper chamber 1141 is designed with a conical surface, which effectively prevents water evaporation. Furthermore, as... Figure 3 As shown, the gravity dehydration module 114, the concentrated sulfuric acid water absorption module 115, and the desiccant drying module 116 form a three-stage drying process to thoroughly dry the hydrogen. The hydrogen passing through the gravity dehydration module 114 sequentially enters the concentrated sulfuric acid water absorption module 115, where the concentrated sulfuric acid absorbs moisture again. Then, the hydrogen continues to enter the desiccant drying module 116 for final drying. Finally, the fully dried hydrogen enters a hydrogen storage bag or is directly supplied to a hydrogen fuel cell.

[0065] In this embodiment, the hydrogen generated by the electrolyzer can be supplied to the hydrogen storage bag through the sixth interface 106 via the ninth interface 109 and the drying and dehydration device, or it can be supplied to the hydrogen fuel cell through the fourth interface 104 via the ninth interface 109 and the drying and dehydration device; the hydrogen inside the hydrogen storage bag can be supplied to the hydrogen fuel cell through the fourth interface 104 via the seventh interface 107.

[0066] Furthermore, the universal interface also includes a first solenoid valve 117, a second solenoid valve 118, and a third solenoid valve 119. The first solenoid valve 117 is connected between the air outlet of the drying and dehydration device and the sixth interface 106; the second solenoid valve 118 is connected between the air outlet of the drying and dehydration device and the fourth interface 104; and the third solenoid valve 119 is connected between the seventh interface 107 and the fourth interface 104.

[0067] The general interface also includes a control module 120, which is connected to the first solenoid valve 117, the second solenoid valve 118 and the third solenoid valve 119 to control the opening and closing of each solenoid valve.

[0068] The control module 120 can be a central processing unit (CPU), other general-purpose processors, digital signal processors (DSP), application specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gates or transistor logic components, discrete hardware components, etc. In this embodiment, the single-chip microcomputer is used as the control module and cooperates with the digital circuit 130 to control the opening and closing of the electromagnetic valves, thereby controlling the passage of hydrogen. For example, the third electromagnetic valve 119 is controlled to control the pressure in the hydrogen storage bag and the working timing of the hydrogen fuel cell.

[0069] In this embodiment, the insertion and removal of the plug-in interface or the on-off of the switches of the various modules can form different modes in which the lithium battery, the hydrogen fuel cell and the photovoltaic cell supply power to the load alone or in combination.

[0070] In this embodiment, the first switch S1 is arranged between the power transmission end of the electrolytic tank and the eighth interface 108, the second switch S2 is arranged between the third interface 103 and the constant current module 113, the third switch S3 is arranged between the second interface 102 and the constant current module 113, and the fourth switch S4 is arranged between the lithium battery discharge port and the second interface 102.

[0071] The working modes include a lithium battery alone function mode, a photovoltaic cell alone power supply mode, a hydrogen fuel cell alone function mode and a hybrid mode.

[0072] When the lithium battery alone power supply mode is selected, the lithium battery discharge port is inserted into the corresponding second interface 102, and then the power is directly output from the first interface 101 to the load.

[0073] When the photovoltaic cell alone power supply mode is selected, the photovoltaic cell power supply port is inserted into the corresponding fifth interface 105, and then the power is output from the first interface 101 to the load after passing through the voltage stabilizing module 112 and the constant current module 113.

[0074] When the hydrogen fuel cell alone function mode is selected, the hydrogen fuel cell hydrogen supply port is connected to the fourth interface 104, the discharge port is connected to the third interface 103, the third electromagnetic valve 119 between the hydrogen storage bag and the hydrogen fuel cell is opened, the hydrogen stored in the hydrogen storage bag is supplied to the hydrogen fuel cell to generate electricity, and the generated electricity is supplied to the load through the constant current module 113 and the first interface 101.

[0075] When the hybrid mode is selected:

[0076] When the photovoltaic cell is the main power supply;

[0077] The lithium battery discharge port is inserted into the corresponding second interface 102, and the photovoltaic cell power supply port is inserted into the corresponding fifth interface 105, and the electrolytic tank power supply end is inserted into the eighth interface 108.

[0078] At this time, the switch S1 and the switch S3 can be closed, and the electrolytic tank or the lithium battery charging port or both are connected at the same time.

[0079] When the photovoltaic cell and the lithium battery charging port are connected at the same time, the energy generated by the photovoltaic cell is supplied to the load after passing through the voltage stabilizing module 112 and the constant current module 113, and the excess part can be used to charge the lithium battery.

[0080] When the photovoltaic cell and the electrolytic tank are connected at the same time, a part of the energy generated by the photovoltaic cell is supplied to the load after passing through the voltage stabilizing module and the constant current module 113, and the excess part can be used to produce hydrogen in the electrolytic tank.

[0081] When the photovoltaic cell, the lithium battery and the electrolytic tank are connected at the same time, a part of the energy generated by the photovoltaic cell is supplied to the load after passing through the voltage stabilizing module 112 and the constant current module 113, and the excess energy is preferentially used to charge the lithium battery, and if there is still surplus, it can be used to produce hydrogen in the electrolytic tank.

[0082] When the hydrogen fuel cell and the lithium battery are connected, the switch S3 is closed, and a part of the energy generated by the hydrogen fuel cell is supplied to the load after passing through the constant current module 113, and the other part can be used to charge the lithium battery through the second interface 102.

[0083] When the lithium battery and the photovoltaic cell supply energy at the same time, they work at the same time to supply energy to the load; at this time, the switch S1 can also be closed to make the electrolytic tank intervene, and supply energy to the load while producing hydrogen in the electrolytic tank.

[0084] When the lithium battery and the hydrogen fuel cell supply energy at the same time, the third electromagnetic valve 119 is opened, hydrogen is transported from the hydrogen storage bag to the hydrogen fuel cell, and the lithium battery and the hydrogen fuel cell work at the same time to generate energy for the load.

[0085] When the photovoltaic cell and the hydrogen fuel cell supply energy at the same time, the energy generated by the photovoltaic cell is supplied to the load after passing through the voltage stabilizing module 112 and the constant current module 113, and the energy generated by the hydrogen fuel cell is supplied to the load after passing through the constant current module 113; at this time, the energy generated by the photovoltaic cell can also be used to produce hydrogen in the electrolytic tank by closing S1.

[0086] The photovoltaic cell, lithium battery charging and discharging port, hydrogen fuel cell and electrolytic tank are connected to the port at the same time. When the light is strong, the photovoltaic cell directly drives the load after passing through the voltage stabilizing module 112 and the constant current module 113. At this time, if the lithium battery SOC value is greater than the threshold value, the lithium battery supplies power together with the photovoltaic cell; if the lithium battery SOC value is lower than the threshold value, the remaining power of the photovoltaic cell charges the lithium battery, and the excess power can be used for electrolysis of the electrolytic tank to produce hydrogen and store the hydrogen in the hydrogen storage bag after drying. When the pressure of the hydrogen storage bag is higher than the threshold value, the first electromagnetic valve 117 is closed, the produced hydrogen is not stored in the hydrogen storage bag, but is supplied to the hydrogen fuel cell to generate electricity and supply the load or charge the lithium battery. In this state, the hydrogen fuel cell does not work.

[0087] When the light is weak, the photovoltaic cell can still work but cannot meet the load demand, and the lithium battery works at the same time, and both supply power; at night, the photovoltaic cell does not work, and the lithium battery is used first. If the lithium battery SOC value is lower than the threshold value, the third electromagnetic valve 119 is opened, the hydrogen fuel cell works to supply the load and charge the lithium battery, but the time is short, and the lithium battery SOC value will not decrease too much; when it is continuous rainy weather, the photovoltaic cell cannot work for a long time, and the lithium battery is used first. When the lithium battery SOC value decreases to the threshold value, the hydrogen fuel cell is triggered to start working.

[0088] In the embodiment, the first electromagnetic valve 117, the second electromagnetic valve 118 and the third electromagnetic valve 119 can control the opening and closing of the drying and water removal device and the hydrogen storage bag, the drying and water removal device and the hydrogen fuel cell, and the hydrogen storage bag and the hydrogen fuel cell, respectively. When the light is strong, if the pressure of the hydrogen storage bag is low, the first electromagnetic valve 117 is opened, and the second electromagnetic valve 118 and the third electromagnetic valve 119 are closed. The hydrogen produced by the electrolytic tank is stored in the hydrogen storage bag. If the pressure of the hydrogen storage bag is higher than the threshold value, the first electromagnetic valve 117 is closed, and the third electromagnetic valve 119 is opened. The hydrogen produced by the electrolytic tank is directly supplied to the hydrogen fuel cell to work; when the light is weak, the electrolytic tank and the hydrogen fuel cell do not work, and the first electromagnetic valve 117, the second electromagnetic valve 118 and the third electromagnetic valve 119 are all closed; at night, if the lithium battery SOC value is higher than the threshold value, only the lithium battery works, and the first electromagnetic valve 117, the second electromagnetic valve 118 and the third electromagnetic valve 119 are all closed. If the lithium battery SOC value is lower than the threshold value, the third electromagnetic valve 119 is opened, and the hydrogen fuel cell works; when it is continuous rainy weather, the situation is the same as at night.

Claims

1. A modular hybrid energy storage and energy conversion multi-power universal interface, characterized in that: It includes the interface body and the first interface, second interface, third interface, fourth interface, fifth interface, sixth interface, seventh interface, eighth interface and ninth interface integrated on the interface body; The first interface is used for electrical connection with the load; The second interface is used for electrical connection with the lithium battery; The third interface is used for electrical connection with a hydrogen fuel cell; The fourth interface is used to connect to the air inlet of the hydrogen fuel cell; The fifth interface is used for electrical connection with the photovoltaic cell; The sixth interface is used to connect to the air inlet of the hydrogen storage bag; The seventh interface is used to connect to the gas outlet of the hydrogen storage bag; The eighth interface is used for electrical connection with the electrolytic cell; The ninth interface is used to connect to the gas outlet of the electrolytic cell; The first interface is electrically connected to the second interface, the third interface, and the fifth interface, respectively; The second interface is electrically connected to the third interface; The fourth interface is connected to the sixth interface and the seventh interface; The fifth interface is electrically connected to the eighth interface; The ninth interface is connected to the sixth interface and the fourth interface.

2. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 1, characterized in that: The general interface also includes a tenth interface and an eleventh interface. The tenth interface is used to connect to the water inlet of the electrolytic cell, and the eleventh interface is used to connect to the water outlet of the water tank. The eleventh interface is connected to the tenth interface.

3. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 1, characterized in that: The general interface also includes a voltage regulator module and a constant current module. The fifth interface is electrically connected to the eighth interface through the voltage regulator module. The fifth interface is electrically connected to the first interface in sequence through the voltage regulator module and the constant current module. The third interface is electrically connected to the first interface through the constant current module. The third interface is electrically connected to the second interface through the constant current module.

4. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 1, characterized in that: The universal interface also includes a drying and dehydration device, which is connected between the ninth interface and the sixth interface and between the ninth interface and the fourth interface, for drying the hydrogen gas introduced from the ninth interface to the sixth interface and the fourth interface.

5. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 4, characterized in that: The drying and dehydration device includes a gravity dehydration module, which is used to condense some of the water vapor in the introduced hydrogen gas.

6. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 5, characterized in that: The drying and dehydration device further includes a concentrated sulfuric acid water absorption module and a desiccant drying module. The gravity dehydration module, the concentrated sulfuric acid water absorption module, and the desiccant drying module are connected in sequence. The inlet of the gravity dehydration module is connected to the ninth interface, and the outlet of the desiccant drying module is connected to the sixth interface. The concentrated sulfuric acid water absorption module is equipped with concentrated sulfuric acid to absorb water vapor in hydrogen gas, and the desiccant drying module is equipped with desiccant to absorb water vapor in hydrogen gas.

7. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 6, characterized in that: The gravity dewatering module includes an upper chamber and a lower chamber. The upper end of the upper chamber is a cone shape that gradually decreases in size upwards. The air outlet of the gravity dewatering module is located at the upper end of the upper chamber and is connected to the air inlet of the concentrated sulfuric acid water absorption module. The air inlet of the gravity dewatering module is located on the side of the upper chamber. The lower chamber is connected to the bottom of the lower chamber.

8. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 4, characterized in that: The general interface also includes a first solenoid valve, a second solenoid valve, and a third solenoid valve. The first solenoid valve is connected between the air outlet of the drying and dehydration device and the sixth interface; the second solenoid valve is connected between the air outlet of the drying and dehydration device and the fourth interface; and the third solenoid valve is connected between the seventh interface and the fourth interface.

9. The modular hybrid energy storage and energy conversion multi-power universal interface as described in claim 8, characterized in that: The general interface also includes a control module, which is connected to the first solenoid valve, the second solenoid valve and the third solenoid valve to control the opening and closing of each solenoid valve.

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