Integrated active hydrogen fuel cell system

Abstract

The application provides an integrated active hydrogen fuel cell system, which comprises a battery assembly connected with an uninterrupted power supply module, a low-voltage electrical equipment, an external equipment and an external low-voltage power supply through wires; the battery assembly comprises a BOP auxiliary component connected with the low-voltage electrical equipment through wires, a stack connected with the BOP auxiliary component, and a step-down DC connected with the stack through wires; a step-up DC is arranged on a line between the stack and the BOP auxiliary component; the step-up DC, the step-down DC, the stack and the BOP auxiliary component are connected with the uninterrupted power supply module through wires; the step-up DC, the step-down DC, the stack and the BOP auxiliary component are connected with the external low-voltage power supply through wires; and the stack is connected with a humidifying mechanism. The application has high integration, adopts double power supply circuits, and can realize fuel cell system operation without external power supply.

Description

Technical Field

[0001] The present invention mainly relates to the technical field of fuel cells, and in particular to an integrated active hydrogen fuel cell system. Background Art

[0002] A fuel cell is a chemical device that converts the chemical energy of fuel directly into electrical energy, also known as an electrochemical generator.

[0003] According to the integrated fuel cell engine system provided by the patent document with application number CN202021644075.0, the fuel cell system includes a frame, a hydrogen supply system, a fuel cell engine, an air intake system, a water circulation system, an air-hydrogen tail exhaust system and an electrical system. The hydrogen supply system is installed on the upper part of the frame, the fuel cell engine, the air intake system, the electrical system, the deionizer, and the expansion tank are installed in the middle part, and the air-hydrogen tail exhaust system, the radiator fan assembly, the electric water pump, and the electronic thermostat are installed at the bottom. The integrated fuel cell engine system of this application arranges the various system components contained therein as a whole on a frame structure, which is convenient for the overall lifting of the system onto the vehicle frame for installation and the overall debugging and packaging of the fuel cell; the overall integrated layout also shortens the connecting pipelines of the water, hydrogen, and air lines, reduces the fluid pressure loss in the pipelines, and thereby improves the fuel utilization and economy of the entire system.

[0004] Currently, fuel cell systems require external power supply to start up, and if the external power supply is abnormally disconnected, the fuel cell system loses power and cannot execute the regular shutdown strategy, which can easily cause damage to the fuel cell system. Summary of the Invention

[0005] The present invention mainly provides an integrated active hydrogen fuel cell system to solve the technical problems raised in the above background technology.

[0006] The technical solution adopted by the present invention to solve the above technical problems is:

[0007] An integrated active hydrogen fuel cell system includes a battery assembly connected to an uninterruptible power supply module, a low-voltage electrical device, external equipment, and an external low-voltage power supply via wires;

[0008] The battery assembly includes a BOP auxiliary component connected to the low-voltage electrical equipment via a wire, a battery stack connected to the BOP auxiliary component, and a step-down DC connected to the battery stack via a wire. A boost DC is provided on the line between the battery stack and the BOP auxiliary component. The boost DC, step-down DC, battery stack and BOP auxiliary component are all connected to the uninterruptible power supply module via a wire. The boost DC, step-down DC, battery stack and BOP auxiliary component are all connected to the external low-voltage power supply via a wire, and the battery stack is connected to a humidification mechanism.

[0009] Furthermore, the water outlet end of the fuel cell stack is connected to a water outlet pipe, the air inlet end of the fuel cell stack is connected to a humidifier, and the air inlet end of the humidifier is connected to an air compressor. In the present invention, air is supplied to the humidifier by the air compressor, the air is humidified by the humidifier, and the humidified air enters the fuel cell stack to improve the wettability of the inner membrane of the fuel cell stack.

[0010] Furthermore, the humidification mechanism includes an emergency liquid storage tank installed on one side surface of the fuel cell stack, and a partition plate installed inside the emergency liquid storage tank. The interior of the emergency liquid storage tank is divided into a condensation chamber and a liquid storage chamber from top to bottom by the partition plate. A cooling component is provided inside the condensation chamber. In the present invention, the atomized water vapor in the liquid storage chamber is discharged into the fuel cell stack, thereby improving the wettability of the inner membrane of the fuel cell stack when there is no external power supply.

[0011] Furthermore, the cooling assembly includes a plurality of first corrugated heat exchange plates installed inside the condensing chamber and arranged in sequence from top to bottom, and a second corrugated heat exchange plate arranged between two adjacent first corrugated heat exchange plates. The first corrugated heat exchange plates and the second corrugated heat exchange plates are arranged alternately. In the present invention, the first corrugated heat exchange plates and the second corrugated heat exchange plates are used to exchange heat with water discharged from the outlet pipe, so that the water discharged from the outlet pipe is cooled.

[0012] Furthermore, the cooling assembly further includes a serpentine condenser tube, which is connected to the BOP auxiliary component and is staggered with the first corrugated heat exchange plate and the second corrugated heat exchange plate.

[0013] Furthermore, a diversion pipe is installed at the bottom end of the outer surface of the water outlet pipe, and the diversion pipe is located inside the condensation chamber. In the present invention, the water flowing through the water outlet pipe is diverted by the diversion pipe, so that a part of the water flowing through the water outlet pipe can enter the condensation chamber.

[0014] Furthermore, the humidification mechanism also includes a first float installed at the bottom end of the liquid storage chamber, and a water-blocking rod for sealing the diversion pipe is installed at the top of the first float. In the present invention, the first float is driven to float up by the water in the liquid storage chamber, and the water-blocking rod is driven to float up by the first float.

[0015] Furthermore, a support ring is installed on the outer surface of the top end of the water blocking rod, a spring sleeved on the water blocking rod is installed on the upper surface of the support ring, and a plug is installed on the top end of the spring.

[0016] Furthermore, the humidification mechanism also includes a second float installed inside the liquid storage chamber, and the top of the second float is provided with a limit switch installed on the lower surface of the partition plate. In the present invention, the limit switch is connected to the controller in the low-voltage electrical equipment so that the controller receives an electrical signal about the water level information inside the liquid storage chamber.

[0017] Furthermore, an air inlet pipe is installed on the shell of the liquid storage chamber, and an end of the air inlet pipe away from the liquid storage chamber is connected to a first three-way pipe, and the first three-way pipe is provided on the pipeline connecting the air compressor and the humidifier;

[0018] An atomizer is installed inside the liquid storage chamber, the water outlet end of the atomizer is connected to an air outlet pipe, and the end of the air outlet pipe away from the liquid storage chamber is connected to a second three-way pipe, which is arranged on the pipeline connecting the humidifier and the fuel cell stack.

[0019] Compared with the prior art, the present invention has the following beneficial effects:

[0020] The present invention has a high degree of integration and adopts a dual power supply circuit. The fuel cell system can operate without external power supply. If the external power supply is abnormally disconnected, the fuel cell system can still execute the conventional shutdown strategy. In harsh environments, the fuel cell can execute the system protection strategy according to the situation.

[0021] The present invention will be explained in detail below with reference to the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 is a schematic diagram of the present invention;

[0023] Figure 2 Schematic diagram of the structure of the battery stack and humidification mechanism of the present invention;

[0024] Figure 3 A top view of the present invention;

[0025] Figure 4 for Figure 3 Sectional view along line AA;

[0026] Figure 5 for Figure 4 A magnified view of the structure of the middle A area;

[0027] Figure 6 This is a structural diagram of the water blocking rod of the present invention;

[0028] Figure 7 This is an exploded view of the emergency liquid storage tank of the present invention;

[0029] Figure 8 It is a structural schematic diagram of the emergency liquid storage tank of the present invention.

[0030] In the figure: 10, battery assembly; 11, BOP auxiliary components; 12, battery stack; 121, water outlet pipe; 122, humidifier; 123, air compressor; 13, step-down DC; 14, step-up DC; 15, humidification mechanism; 151, emergency liquid storage tank; 152, partition plate; 153, condensation chamber; 154, liquid storage chamber; 1541, air inlet pipe; 1542, first three-way pipe; 1543, air outlet pipe; 1544, second three-way pipe; 1 545. Atomizing plate; 155. Cooling assembly; 1551. First corrugated heat exchange plate; 1552. Second corrugated heat exchange plate; 1553. Serpentine condenser; 156. First float; 157. Water-blocking rod; 1571. Support ring; 1572. Spring; 1573. Plug; 158. Second float; 159. Limit switch; 20. Uninterruptible power supply module; 30. Low-voltage electrical equipment; 40. External low-voltage power supply; 50. External equipment. DETAILED DESCRIPTION

[0031] To facilitate understanding of the present invention, the present invention will be described more comprehensively below with reference to the relevant drawings. Several embodiments of the present invention are given in the drawings. However, the present invention can be implemented in different forms and is not limited to the embodiments described in the text. On the contrary, these embodiments are provided to make the content disclosed in the present invention more thorough and comprehensive.

[0032] It should be noted that when an element is referred to as being "fixed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used in this article are for illustrative purposes only.

[0033] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly used by those skilled in the art to which the present invention pertains. The terminology used in the specification of the present invention is for the purpose of describing specific embodiments and is not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.

[0034] For example, please refer to the attached Figure 1-8 , an integrated active hydrogen fuel cell system, including a battery assembly 10, wherein the battery assembly 10 is connected to an uninterruptible power supply module 20, a low-voltage electrical device 30, an external device 50, and an external low-voltage power supply 40 through wires;

[0035] The battery assembly 10 includes a BOP auxiliary component 11 connected to the low-voltage electrical equipment 30 via a wire, a battery stack 12 connected to the BOP auxiliary component 11, and a step-down DC 13 connected to the battery stack 12 via a wire. A boost DC 14 is provided on the line between the battery stack 12 and the BOP auxiliary component 11. The boost DC 14, step-down DC 13, battery stack 12, and BOP auxiliary component 11 are all connected to the uninterruptible power supply module 20 via a wire. The boost DC 14, step-down DC 13, battery stack 12, and BOP auxiliary component 11 are all connected to the external low-voltage power supply 40 via a wire. The battery stack 12 is connected to a humidification mechanism 15.

[0036] It should be noted that, in this embodiment, the boost DC14 is used to boost the electric energy generated by the stack module, and the step-down DC13 is used to convert the high voltage into the voltage required by the system's low-voltage equipment to supply power to the low-voltage electrical equipment. The low-voltage electrical equipment 30 includes various sensors and a fuel cell system controller, which are used to monitor the status of the fuel cell system and control the operation of the fuel cell system.

[0037] For details, please refer to the attached Figure 2 、 3 and 4, the water outlet end of the battery stack 12 is connected to a water outlet pipe 121, the air inlet end of the battery stack 12 is connected to a humidifier 122, and the air inlet end of the humidifier 122 is connected to an air compressor 123;

[0038] The humidification mechanism 15 includes an emergency liquid storage tank 151 mounted on one side of the fuel cell stack 12, and a partition plate 152 mounted inside the emergency liquid storage tank 151. The interior of the emergency liquid storage tank 151 is divided into a condensation chamber 153 and a liquid storage chamber 154 from top to bottom by the partition plate 152. A cooling assembly 155 is provided inside the condensation chamber 153.

[0039] It should be noted that, in this embodiment, the air compressor 123 supplies air to the humidifier 122 , which humidifies the air. The humidified air then enters the cell stack 12 to improve the wettability of the membrane inside the cell stack 12 .

[0040] Furthermore, the battery stack 12 discharges water through the water outlet pipe 121, and the discharged water is cooled by the elements in the condensation chamber 153. The cooled water enters the liquid storage chamber 154 through the through hole on the partition plate 152 for temporary storage. Therefore, when there is no external power supply in the external device 50, the valve body on the air outlet pipe 1543 is powered by the uninterruptible power supply module 20, and the valve body on the air outlet pipe 1543 is opened to discharge the atomized water vapor in the liquid storage chamber 154, thereby improving the wettability of the inner membrane of the battery stack 12 when there is no external power supply.

[0041] For details, please refer to the attached Figure 4 and 7 The cooling assembly 155 includes a plurality of first corrugated heat exchange plates 1551 installed in the condensing chamber 153 and arranged sequentially from top to bottom, and a second corrugated heat exchange plate 1552 arranged between two adjacent first corrugated heat exchange plates 1551. The first corrugated heat exchange plates 1551 and the second corrugated heat exchange plates 1552 are staggered.

[0042] The cooling assembly 155 further includes a serpentine condenser 1553 , which is connected to the BOP auxiliary component 11 . The serpentine condenser 1553 is staggered with the first corrugated heat exchange plate 1551 and the second corrugated heat exchange plate 1552 .

[0043] A diverter pipe 124 is installed at the bottom end of the outer surface of the water outlet pipe 121, and the diverter pipe 124 is located inside the condensation chamber 153;

[0044] It should be noted that, in this embodiment, the water discharged from the outlet pipe 121 is guided to contact the first and second corrugated heat exchange plates 1551, 1552 by the inclined first and second corrugated heat exchange plates 1551, 1552, so that the first and second corrugated heat exchange plates 1551, 1552 exchange heat with the water discharged from the outlet pipe 121, thereby cooling the water discharged from the outlet pipe 121.

[0045] Furthermore, both ends of the serpentine condenser tube 1553 are connected to the liquid inlet and liquid outlet of the coolant control device in the BOP auxiliary component 11 through flexible pipes, so that the liquid circulating in the serpentine condenser tube 1553 continuously exchanges heat with the water discharged from the outlet pipe 121 in the condensation chamber 153, and the serpentine condenser tube 1553 exchanges heat with the steam of the water discharged from the outlet pipe 121, so that the cooled steam condenses into water and falls, and contacts the first corrugated heat exchange plate 1551 and the second corrugated heat exchange plate 1552 through the serpentine condenser tube 1553, so that the first corrugated heat exchange plate 1551 and the second corrugated heat exchange plate 1552 can also have heat exchange capacity;

[0046] The BOP auxiliary components 11 include fuel supply equipment, air supply equipment, coolant control equipment and PTC equipment;

[0047] Furthermore, the water flowing through the water outlet pipe 121 is diverted through the diversion pipe 124 , so that a portion of the water flowing through the water outlet pipe 121 can enter the condensation chamber 153 .

[0048] For details, please refer to the attached Figure 4 and 6 The humidifying mechanism 15 further includes a first float 156 mounted on the bottom end of the liquid storage chamber 154 , and a water blocking rod 157 for blocking the diversion pipe 124 is mounted on the top of the first float 156 ;

[0049] A support ring 1571 is installed on the outer surface of the top end of the water blocking rod 157. A spring 1572 sleeved on the water blocking rod 157 is installed on the upper surface of the support ring 1571. A plug 1573 is installed on the top end of the spring 1572.

[0050] The humidifying mechanism 15 further includes a second float 158 ​​installed inside the liquid storage chamber 154 , and a travel switch 159 installed on the lower surface of the partition plate 152 is provided on the top of the second float 158 ​​;

[0051] An air inlet pipe 1541 is installed on the housing of the liquid storage chamber 154. One end of the air inlet pipe 1541 away from the liquid storage chamber 154 is connected to a first three-way pipe 1542. The first three-way pipe 1542 is provided on the pipeline connecting the air compressor 123 and the humidifier 122.

[0052] An atomizing plate 1545 is installed inside the liquid storage chamber 154. The water outlet end of the atomizing plate 1545 is connected to an air outlet pipe 1543. The end of the air outlet pipe 1543 away from the liquid storage chamber 154 is connected to a second three-way pipe 1544. The second three-way pipe 1544 is provided on the pipeline connecting the humidifier 122 and the fuel cell stack 12.

[0053] It should be noted that, in this embodiment, the water in the liquid storage chamber 154 drives the first float 156 to float up, which in turn drives the water blocking rod 157 to float up.

[0054] Furthermore, the rising water blocking rod 157 drives the plug 1573 to float upward, so that when there is more water in the liquid storage chamber 154, the plug 1573 blocks the diversion pipe 124, thereby stopping the water inflow. The support ring 1571 provides support for the spring 1572, and the spring 1572 assists in pushing the plug 1573 upward.

[0055] Furthermore, the water in the liquid storage chamber 154 drives the second float 158 ​​to float upward, so that the second float 158 ​​touches the limit switch 159, and the limit switch 159 is connected to the controller in the low-voltage electrical equipment 30, so that the controller receives an electrical signal about the water level information inside the liquid storage chamber 154;

[0056] Furthermore, the gas flowing out of the air compressor 123 is diverted through the first three-way pipe 1542, so that a portion of the gas enters the liquid storage chamber 154, so that the atomized water in the liquid storage chamber 154 can flow out. A high-pressure relief valve is provided on the liquid storage chamber 154, and a hose is provided at the outlet of the high-pressure relief valve to connect to the air inlet of the humidifier 122. This allows gas exceeding the threshold of the high-pressure relief valve to enter the humidifier 122 through the hose, and prevents the internal pressure of the liquid storage chamber 154 from being too high, which would damage the liquid storage chamber 154.

[0057] The water mist in the liquid storage chamber 154 atomized by the atomizing plate 1545 enters the air outlet pipe 1543 , and the water mist in the air outlet pipe 1543 flows through the second three-way pipe 1544 into the pipeline connecting the humidifier 122 and the fuel cell stack 12 , and enters the fuel cell stack 12 through the pipeline.

[0058] The specific operation mode of the present invention is as follows:

[0059] The uninterruptible power supply module 20 or the external power supply in the external device 50 supplies power to the fuel cell system. The step-down DC 13 is working or the external low-voltage power supply 40 supplies power. After receiving the startup command, the controller in the low-voltage electrical equipment 30 controls the BOP auxiliary component 11 to start running, the fuel cell stack 12 starts generating electricity, and the step-up DC 14 is used to charge the uninterruptible power supply, and the step-down DC 13, the BOP auxiliary component 11, and the external device 50 are powered to complete the operation of the fuel cell system. When shutting down, similar logic is executed;

[0060] When there is no external power supply in the external device 50 or when the device is turned on or off, or when the external power supply in the external device 50 is suddenly lost, only the uninterruptible power supply module 20 supplies power, and the same logic as when there is external power supply in the external device 50 is executed;

[0061] When there is no external power supply in the external device 50; in a harsh environment, power is supplied by the uninterruptible power supply module 20, the step-down DC13, the BOP auxiliary component 11 and the low-voltage electrical equipment 30 work, and the controller in the low-voltage electrical equipment 30 executes the fuel cell protection strategy in real time according to the detected data, such as water purge.

[0062] The above description of the present invention is exemplified in conjunction with the accompanying drawings. It is obvious that the specific implementation of the present invention is not limited to the above-mentioned method. As long as such non-substantial improvements are made using the method concept and technical solution of the present invention, or the concept and technical solution of the present invention are directly applied to other occasions without improvement, they are all within the scope of protection of the present invention.

Claims

1. An integrated active hydrogen fuel cell system, characterized in that: The invention comprises a battery assembly (10), wherein the battery assembly (10) is connected to an uninterruptible power supply module (20), a low-voltage electrical device (30), an external device (50), and an external low-voltage power supply (40) via a wire; The battery assembly (10) includes a BOP auxiliary component (11) connected to the low-voltage electrical equipment (30) via a wire, a battery stack (12) connected to the BOP auxiliary component (11), and a step-down DC (13) connected to the battery stack (12) via a wire, a boost DC (14) is provided on the line between the battery stack (12) and the BOP auxiliary component (11), the boost DC (14), the step-down DC (13), the battery stack (12) and the BOP auxiliary component (11) are all connected to the uninterruptible power supply module (20) via a wire, the boost DC (14), the step-down DC (13), the battery stack (12) and the BOP auxiliary component (11) are all connected to the external low-voltage power supply (40) via a wire, and the battery stack (12) is connected to a humidification mechanism (15); The water outlet end of the battery stack (12) is connected to a water outlet pipe (121), the air inlet end of the battery stack (12) is connected to a humidifier (122), and the air inlet end of the humidifier (122) is connected to an air compressor (123); The humidifying mechanism (15) comprises an emergency liquid storage tank (151) mounted on a side surface of the battery stack (12), and a partition plate (152) mounted inside the emergency liquid storage tank (151); the interior of the emergency liquid storage tank (151) is sequentially divided from top to bottom into a condensation chamber (153) and a liquid storage chamber (154) by the partition plate (152); a cooling assembly (155) is provided inside the condensation chamber (153); The humidifying mechanism (15) further includes a second float (158) installed inside the liquid storage chamber (154), and a travel switch (159) installed on the lower surface of the partition plate (152) is provided at the top end of the second float (158); An air inlet pipe (1541) is installed on the shell of the liquid storage chamber (154); an end of the air inlet pipe (1541) away from the liquid storage chamber (154) is connected to a first three-way pipe (1542); and the first three-way pipe (1542) is provided on a pipeline connecting the air compressor (123) and the humidifier (122); An atomizing plate (1545) is installed inside the liquid storage chamber (154); the water outlet end of the atomizing plate (1545) is connected to an air outlet pipe (1543); the end of the air outlet pipe (1543) away from the liquid storage chamber (154) is connected to a second three-way pipe (1544); and the second three-way pipe (1544) is provided on a pipeline connecting the humidifier (122) and the fuel cell stack (12).

2. The integrated active hydrogen fuel cell system according to claim 1, characterized in that: The cooling assembly (155) includes a plurality of first corrugated heat exchange plates (1551) installed inside the condensing chamber (153) and arranged sequentially from top to bottom, and a second corrugated heat exchange plate (1552) arranged between two adjacent first corrugated heat exchange plates (1551), and the first corrugated heat exchange plates (1551) and the second corrugated heat exchange plates (1552) are arranged in an alternating manner.

3. The integrated active hydrogen fuel cell system according to claim 2, characterized in that: The cooling assembly (155) further includes a serpentine condenser (1553), which is connected to the BOP auxiliary component (11). The serpentine condenser (1553) is staggered with the first corrugated heat exchange plate (1551) and the second corrugated heat exchange plate (1552).

4. The integrated active hydrogen fuel cell system according to claim 3, characterized in that: A diversion pipe (124) is installed at the bottom end of the outer surface of the water outlet pipe (121), and the diversion pipe (124) is located inside the condensation chamber (153).

5. The integrated active hydrogen fuel cell system according to claim 4, characterized in that: The humidifying mechanism (15) further comprises a first float (156) installed at the bottom end of the liquid storage chamber (154), and a water blocking rod (157) for blocking the diversion pipe (124) is installed at the top end of the first float (156).

6. The integrated active hydrogen fuel cell system according to claim 5, characterized in that: A support ring (1571) is installed on the outer surface of the top end of the water blocking rod (157), a spring (1572) sleeved on the water blocking rod (157) is installed on the upper surface of the support ring (1571), and a plug (1573) is installed on the top end of the spring (1572).

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