A control system and method for powering on and off a forklift equipped with a hydrogen fuel cell

Abstract

The present invention provides a control system for powering up and down of a forklift equipped with a hydrogen fuel cell, including a vehicle system and a hydrogen fuel cell system, the hydrogen fuel cell system is electrically connected to the vehicle system, the hydrogen fuel cell system is provided with a fuel cell control unit, the fuel cell control unit is connected to a battery management module, the fuel cell control unit is connected to a power system, the power system is connected to a direct current conversion system, the direct current conversion system is electrically connected to the vehicle system, the fuel cell control unit is connected to the vehicle system via a communication cable, and a method for controlling powering up and down of a forklift equipped with a hydrogen fuel cell includes a power-on method and a power-off method. The present invention realizes a technology for improving the life of hydrogen fuel cells.

Description

Technical Field

[0001] The present invention relates to the technical field of hydrogen fuel cell forklifts, and in particular to a power-on and power-off control system and method for a hydrogen fuel cell forklift. Background Art

[0002] The country advocates the goal of achieving carbon neutrality and carbon compliance, and vigorously develops new energy. Hydrogen energy is a clean energy source, and the product after use is water, which is in line with the country's dual carbon goals. Existing forklift fuels are mainly diesel, gasoline, liquefied gas and other fuels. These fuels are not only scarce, but the combustion products also have certain pollution to the environment. The hydrogen fuel cell forklift involved in this article is a new energy vehicle with zero carbon emissions. For forklifts equipped with hydrogen fuel cells, hydrogen fuel cells are equivalent to engines. The life of the fuel cell affects the life cycle of the entire vehicle, especially whether the control system and method of the hydrogen fuel cell's power on and off are reasonable, which directly affects the battery's use efficiency and the life of the battery's internal components.

[0003] A document published in a Chinese patent, "A Hydrogen Fuel Cell Tractor", with the publication number CN111452613A, discloses a hydrogen fuel cell tractor, including a lithium battery system, a hydrogen fuel cell system, an electric control system and an asynchronous motor. The electric control system includes a vehicle controller and a motor controller. The vehicle controller is respectively connected to the lithium battery system, the hydrogen fuel cell system and the motor controller. The power output ends of the lithium battery system and the hydrogen fuel cell system are respectively connected to the asynchronous motor through the motor controller. The power output end of the hydrogen fuel cell system is also connected to the power input end of the lithium battery system. This patent does not combine different functional control modules, does not realize the logical control of the internal power up and down of the hydrogen fuel cell system, does not improve the battery efficiency, does not reduce the loss of internal battery components, and does not increase the life of the hydrogen fuel cell. Summary of the invention

[0004] In order to overcome the shortcoming of the shortcoming of the low life of hydrogen fuel cells, the present invention provides a hydrogen fuel cell forklift power-on and power-off control system and method, which realizes the combination of different functional control modules to realize logical control of the power-on and power-off inside the hydrogen fuel cell system, improves the battery utilization efficiency, reduces the loss of internal battery components, and increases the life of the hydrogen fuel cell.

[0005] To achieve the above objectives, the present invention adopts the following technical solutions.

[0006] A control system for up and down power supply of a forklift equipped with a hydrogen fuel cell, comprising a whole vehicle system and a hydrogen fuel cell system, wherein the hydrogen fuel cell system is electrically connected to the whole vehicle system, the hydrogen fuel cell system is provided with a fuel cell control unit, the fuel cell control unit is connected to a battery management module, the fuel cell control unit is connected to a power supply system, the power supply system is connected to a direct current conversion system, the direct current conversion system is electrically connected to the whole vehicle system, and the fuel cell control unit is connected to the whole vehicle system via a communication cable.

[0007] The present invention includes a whole vehicle system and a hydrogen fuel cell system, wherein the hydrogen fuel cell system is provided with a fuel cell control unit, and the fuel cell control unit adopts a DSP signal processing chip, and its product model is Infineon TC297. The DSP signal processing chip processes the real-time information transmitted by the battery management module and the power system, adjusts the operating state of the power system, and the power management system manages the charging, discharging and dynamic balance of the battery system and the power battery system, thereby protecting the internal components of the battery and improving the life of the hydrogen fuel cell.

[0008] Preferably, the fuel cell control unit is electrically connected to a control module K1, the second end of the control module K1 is connected to a control module K2 and a power management system, the third end of the control module K1 is connected to a control module K2 and a key switch, the other end of the key switch is connected to a fuse, the fuse is connected to an emergency stop switch, and the emergency stop switch is electrically connected to a power system. The present invention connects the control module K1 via a fuel cell control unit, the control module K1 is a logic control module, the control module K1 is connected to the control module K2 and the power management system, and when powered on, the control module K1 controls the power management system and the fuel cell control unit to enable the power system to work.

[0009] Preferably, the other end of the control module K2 is connected to a delay module, the second end of the delay module is electrically connected to the fuel cell control unit, and the third end of the delay module and the fuel cell control unit are connected to the end of the key switch away from the fuse.

[0010] The present invention provides a circuit for controlling the power on and off of the device. When the power is off, the hydrogen fuel cell control unit triggers the delay module to work, disconnects the control module K2, and the power management system 22 triggers the control module K3 to disconnect.

[0011] Preferably, the battery management module is connected to a control module K3, a second end of the control module K3 and the power system are connected to the battery management module, a third end of the control module K3 is connected to a discharge relay, and a second end of the discharge relay and the battery management module and the power system are connected to a DC conversion system.

[0012] The present invention protects the control device from direct contact with large current through the discharge relay. The battery management module transmits information to the control module K3. The control module K3 is a logic control module. The control module K3 controls the opening and closing of the discharge relay to control whether the DC conversion system is powered on.

[0013] A method for controlling power on and off of a forklift equipped with a hydrogen fuel cell includes a power on method and a power off method, wherein the power on method is: after closing the emergency stop switch, closing the key switch, the power on port of the control module K1 is energized, the hydrogen fuel cell control unit triggers the control module K1 to disconnect, the delay module to work, the control module K2 is closed, the power management system triggers the control module K3 to be energized, the discharge relay is closed, and after the DC conversion system is energized, the output is to the whole vehicle system, and the whole vehicle is started.

[0014] The present invention controls the power-on port of the control module K1 to be powered by closing the emergency stop switch and the key switch, the control module K2 is closed, the power management system triggers the control module K3 to be powered, the discharge relay is closed, the DC conversion system is powered, and the whole vehicle is started.

[0015] Preferably, the power-off method is to disconnect the key switch, the power-on port of the control module K1 loses power, the hydrogen fuel cell control unit triggers the delay module to operate, disconnects the control module K2, the power management system triggers the control module K3 to disconnect, the discharge relay is disconnected, the DC conversion system has no output, and the entire vehicle system stops working.

[0016] The present invention disconnects the key switch to control the power-on port of the control module K1 to lose power, the hydrogen fuel cell control unit triggers the delay module to work, disconnects the control module K2, the power management system triggers the control module K3 to disconnect, the discharge relay is disconnected, the DC conversion system has no output, and the whole vehicle stops working.

[0017] The beneficial effects of the present invention are:

[0018] A power-on and power-off control system for a forklift equipped with a hydrogen fuel cell processes the real-time information transmitted by the battery management module and the power system through a signal processing chip, adjusts the operating state of the power system, and the power management system manages the charging, discharging, and dynamic balance of the battery system and the power battery system, thereby protecting the internal components of the battery and improving the life of the hydrogen fuel cell. A power-on and power-off control method for a forklift equipped with a hydrogen fuel cell detects whether the upper end of the control module K1 is powered by the hydrogen fuel cell control unit, triggers the on and off of the control module K2, and thus the power management system manages the on and off of the control module K3, controls the on and off of the discharge relay, and manages whether the battery system is working. Through the above internal power-on and power-off control logic of the hydrogen fuel cell system 2, the power-on and power-off control of the entire vehicle system 1 is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a circuit module diagram of the present invention.

[0020] In the figure: 1. vehicle system, 2. hydrogen fuel cell system, 21. fuel cell control unit, 22. power management system, 23. power system, 24. emergency stop switch, 25. fuse, 26. key switch, 27. delay module, 28. discharge relay, 29. DC conversion system. DETAILED DESCRIPTION

[0021] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments.

[0022] according to Figure 1 :

[0023] A control system for electric forklift equipped with hydrogen fuel cells, comprising a vehicle system 1 and a hydrogen fuel cell system 2, wherein the hydrogen fuel cell system 2 is electrically connected to the vehicle system 1, and the hydrogen fuel cell system 2 is provided with a fuel cell control unit 21, wherein the fuel cell control unit 21 is electrically connected to a control module K1, wherein the second end of the control module K1 is connected to a control module K2 and a power management system 22, wherein the battery management module 22 is connected to a control module K3, wherein the second end of the control module K3 and the power system 23 are connected to the battery management module 22, wherein the third end of the control module K3 is connected to a discharge relay 28, wherein the second end of the discharge relay 28 and the battery management module 22 and the power system 23 are connected to a DC conversion system 29, wherein the third end of the control module K1 is connected to the control module K 2 and a key switch 26, the other end of the control module K2 is connected to a delay module 27, the second end of the delay module 27 is electrically connected to the fuel cell control unit 21, the third end of the delay module 27 and the fuel cell control unit 21 are connected together with an end of the key switch 26 away from the fuse 25, the other end of the key switch 26 is connected to the fuse 25, the fuse 25 is connected to the emergency stop switch 24, the emergency stop switch 24 is electrically connected to the power supply system 23, the fuel cell control unit 21 is connected to the battery management module 22, the fuel cell control unit 21 is connected to the power supply system 23, the power supply system 23 is connected to the DC conversion system 29, the DC conversion system 29 is electrically connected to the whole vehicle system 1, and the fuel cell control unit 21 is connected to the whole vehicle system 1 through a communication cable.

[0024] A method for controlling power on and off of a forklift equipped with a hydrogen fuel cell, comprising a power on method and a power off method, wherein the power on method is: after closing the emergency stop switch 24, closing the key switch 26, the power on port of the control module K1 is energized, the hydrogen fuel cell control unit 21 triggers the control module K1 to disconnect, the delay module 27 to work, the control module K2 is closed, the power management system 22 triggers the control module K3 to be energized, the discharge relay 28 is closed, and after the DC conversion system 29 is energized, the output is to the whole vehicle system 1, and the whole vehicle is started, wherein the power off method is to disconnect the key switch 26, the power on port of the control module K1 loses power, the hydrogen fuel cell control unit 21 triggers the delay module 27 to work, disconnects the control module K2, the power management system 22 triggers the control module K3 to disconnect, the discharge relay 28 is disconnected, the DC conversion system 29 has no output, and the whole vehicle system 1 stops working.

[0025] The working process of this embodiment 1:

[0026] After closing the emergency stop switch 24, close the key switch 26, the power-on port of the control module K1 is energized, the hydrogen fuel cell control unit 21 triggers the control module K1 to disconnect and the delay module 27 to work, the control module K2 is closed, and the power management system 22 triggers the control module K3 to be energized, closes the discharge relay 28, and after the DC power conversion system 29 is energized, it is output to the vehicle system 1, and the vehicle starts. Disconnect the key switch 26, the power-on port of the control module K1 loses power, the hydrogen fuel cell control unit 21 triggers the delay module 27 to work, disconnects the control module K2, and the power management system 22 triggers the control module K3 to disconnect, the discharge relay 28 is disconnected, and the DC power conversion system 29 has no output, and the vehicle system 1 stops working.

[0027] The present invention includes a whole vehicle system and a hydrogen fuel cell system, wherein the hydrogen fuel cell system is provided with a fuel cell control unit, and the fuel cell control unit adopts a DSP signal processing chip, and its product model is Infineon TC297. The DSP signal processing chip processes the real-time information transmitted by the battery management module and the power system, adjusts the operating state of the power system, and the power management system manages the charging, discharging and dynamic balance of the battery system and the power battery system, thereby protecting the internal components of the battery and improving the life of the hydrogen fuel cell.

[0028] The present invention connects the control module K1 via the fuel cell control unit. The control module K1 is a logic control module. The control module K1 is connected to the control module K2 and the power management system. When powered on, the control module K1 controls the power management system and the fuel cell control unit to make the power system work.

[0029] The present invention provides a circuit for controlling the power on and off of the device. When the power is off, the hydrogen fuel cell control unit triggers the delay module to work, disconnects the control module K2, and the power management system 22 triggers the control module K3 to disconnect.

[0030] The present invention protects the control device from direct contact with large current through the discharge relay. The battery management module transmits information to the control module K3. The control module K3 is a logic control module. The control module K3 controls the opening and closing of the discharge relay to control whether the DC conversion system is powered on.

[0031] The present invention controls the power-on port of the control module K1 to be powered by closing the emergency stop switch and the key switch, the control module K2 is closed, the power management system triggers the control module K3 to be powered, the discharge relay is closed, the DC conversion system is powered, and the whole vehicle is started.

[0032] The present invention disconnects the key switch to control the power-on port of the control module K1 to lose power, the hydrogen fuel cell control unit triggers the delay module to work, disconnects the control module K2, the power management system triggers the control module K3 to disconnect, the discharge relay is disconnected, the DC conversion system has no output, and the whole vehicle stops working.

Claims

1. A control system for the up and down power supply of a forklift equipped with a hydrogen fuel cell, characterized by: The invention comprises a vehicle system (1) and a hydrogen fuel cell system (2), wherein the hydrogen fuel cell system (2) is electrically connected to the vehicle system (1), the hydrogen fuel cell system (2) is provided with a fuel cell control unit (21), the fuel cell control unit (21) is connected to a battery management module (22), the fuel cell control unit (21) is connected to a power supply system (23), the power supply system (23) is connected to a direct current conversion system (29), the direct current conversion system (29) is electrically connected to the vehicle system (1), and the fuel cell control unit (21) is connected to the vehicle system (1) via a communication cable; The fuel cell control unit (21) is electrically connected to a control module K1; a second end of the control module K1 is connected to a control module K2 and a power management module (22); a third end of the control module K1 is connected to a control module K2 and a key switch (26); the other end of the key switch (26) is connected to a fuse (25); the fuse (25) is connected to an emergency stop switch (24); and the emergency stop switch (24) is electrically connected to a power system (23); The other end of the control module K2 is connected to a delay module (27), a second end of the delay module (27) is electrically connected to the fuel cell control unit (21), and a third end of the delay module (27) and the fuel cell control unit (21) are connected together to an end of the key switch (26) away from the fuse (25); The battery management module (22) is connected to a control module K3; a second end of the control module K3 and the power system (23) are connected to the battery management module (22); a third end of the control module K3 is connected to a discharge relay (28); a second end of the discharge relay (28) and the battery management module (22) and the power system (23) are connected to a direct current conversion system (29).

2. A method for controlling the power on and off of a forklift equipped with a hydrogen fuel cell, using the power on and off control system of a forklift equipped with a hydrogen fuel cell in claim 1, characterized in that: The invention comprises a power-on method and a power-off method, wherein the power-on method comprises: after closing the emergency stop switch (24), closing the key switch (26), the power-on port of the control module K1 is energized, the fuel cell control unit (21) triggers the control module K1 to be disconnected, the delay module (27) to work, the control module K2 is closed, the power management module (22) triggers the control module K3 to be energized, the discharge relay (28) is closed, and after the direct current conversion system (29) is energized, the output is sent to the whole vehicle system (1), and the whole vehicle is started; The power-off method is to disconnect the key switch (26), the power-on port of the control module K1 loses power, the fuel cell control unit (21) triggers the delay module (27) to work, disconnects the control module K2, the power management module (22) triggers the control module K3 to disconnect, the discharge relay (28) is disconnected, the DC conversion system (29) has no output, and the vehicle system (1) stops working.

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