Electric forklift control system

Abstract

The utility model relates to the technical field of electric forklifts, and provides an electric forklift control system which comprises a battery and a controller, the battery is connected with the controller, the battery comprises a high-voltage lithium battery and a storage battery, the high-voltage lithium battery is used for controlling power supply, the storage battery is used for starting power supply, and the controller is an all-in-one controller and comprises a VCU, a DC converter, a walking MCU and a lifting MCU. The VCU is connected with the gear unit, the control unit, the brake unit, the cooling unit, the communication unit and the seat and used for overall control of the system, the DC converter is used for charging the storage battery and supplying power of the storage battery to the whole forklift, the walking MCU is connected with the walking motor and used for controlling movement of the forklift, and the lifting MCU is connected with the lifting motor and used for controlling action of a working arm of the forklift. According to the utility model, the high-voltage wiring harness and the plugging cost of the whole vehicle can be reduced, the economical efficiency is improved, the control efficiency is improved, and the energy loss is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of electric forklifts, in particular to an electric forklift control system. Background Art

[0002] Electric forklifts are electrical-powered warehousing and logistics equipment widely used in warehouses, factories, logistics centers, ports, retail industries, and various other locations requiring material handling. Compared to traditional internal combustion engine forklifts, electric forklifts offer significant advantages such as low noise, zero pollution, low operating costs, and simplified maintenance, making them more compliant with modern environmental protection and energy conservation requirements.

[0003] The current electric forklift control systems mostly use a separate setting, which results in too many wiring harnesses for the entire vehicle, high plug-in costs, poor control efficiency, large energy loss, and poor economy.

[0004] Therefore, in view of the above problems, an electric forklift control system is proposed to solve the above problems. Utility Model Content

[0005] The utility model aims to improve the control system of an electric forklift by reducing the high-voltage wiring harness and plug-in costs of the entire vehicle, thereby improving economic efficiency, and at the same time improving control efficiency and reducing energy loss.

[0006] In order to achieve the above-mentioned purpose, the present invention is realized through the following technical solutions:

[0007] An electric forklift control system includes a battery and a controller. The battery is connected to the controller. The battery includes a high-voltage lithium battery and a storage battery. The high-voltage lithium battery is used to power control, and the storage battery is used to power starting. The controller is an all-in-one controller, including a VCU, a DC converter, a travel MCU, and a lift MCU. The VCU is connected to a gear unit, a control unit, a brake unit, a cooling unit, a communication unit, and a seat for overall system control. The DC converter is used to charge the storage battery and supply power to the entire vehicle. The travel MCU is connected to the travel motor to control the movement of the forklift. The lift MCU is connected to the lift motor to control the movement of the forklift's working arm.

[0008] The charging unit includes a charging base and a BMS. The BMS is connected to an external charging device through the charging base to manage the battery charging status;

[0009] Start the switch unit, connected to the controller, to start the system operation;

[0010] The display unit is connected to the brake unit and the gear unit and is used to display the current moving status of the forklift.

[0011] Preferably, the high-voltage lithium battery uses 316.8V high voltage to power the controller, and the battery uses 12V lead-acid battery to power the controller startup, and the battery is connected to fuse MF1 and fuse MF2.

[0012] Preferably, the shift unit includes a forward shift switch and a reverse shift switch, which are connected in parallel with the fuse F5; and further includes a reverse light switch, which is connected to the fuse F6 and the display unit.

[0013] Preferably, the control unit includes an accelerator pedal and a control switch group. The accelerator pedal is connected to the controller for controlling the moving speed of the forklift; the control switch group includes a tilt switch, a lifting switch and a side shift switch. The tilt switch, the lifting switch and the side shift switch are connected in parallel with the fuse F11 to control the movement of the oil pump motor to move the forklift working arm.

[0014] Preferably, the braking unit includes a brake switch and a handbrake switch. The brake switch is connected to a fuse F6. The fuse F6 is a common insurance for braking and reversing and is not directly controlled by a relay.

[0015] Preferably, the cooling unit includes a water pump and a fan, the water pump is connected to the water pump relay, the water pump relay is connected to the controller, fuse F13 and fuse F8; the fan is connected to the fan high-speed relay and the fan low-speed relay, the fan high-speed relay and the fan low-speed relay are connected to each other and in parallel with fuse F4, and the fan high-speed relay and the fan low-speed relay are connected to the controller.

[0016] Preferably, the communication unit includes OBD, OBD is connected to fuse F14, a walking debugging port and an oil pump debugging port are set on the OBD, and a body port, a whole vehicle port, a walking debugging port and a lifting debugging port are set on the controller for writing the control program into the controller.

[0017] Preferably, the BMS is connected to the fuse F0 and the fuse F2 , and the BMS includes a charging port, a temperature port, and a vehicle body port, and both the charging port and the temperature port are connected to the charging base.

[0018] Preferably, the starting switch unit includes a key switch, an emergency stop switch, a password lock and a starting relay, the key switch is connected in series with the emergency stop switch and the password lock, the password lock is connected to the starting relay, and the emergency stop switch is connected to the fuse F10.

[0019] Preferably, the display unit includes a brake assembly, a reversing assembly, a combination instrument, a light switch assembly and a warning assembly; the brake assembly includes a brake light L1 and a brake light L2, and the brake light L1 and the brake light L2 are connected in parallel to the brake switch; the reversing assembly includes a reversing light L3, a reversing light L4 and a buzzer, and the reversing light L3, the reversing light L4 and the buzzer are connected in parallel to the reverse gear switch; the light switch assembly includes a flasher, a left turn switch, a right turn switch, a position light switch, a front working light switch, a rear working light switch and a warning light switch, and the warning assembly includes a horn switch Off, horn, left turn signal, right turn signal, position light, front work light, rear work light and warning light. The horn switch and horn are connected through a relay, the relay is connected to fuse F1, the flasher is connected to fuse F12, the left turn switch is connected to the left turn signal, the right turn switch is connected to the right turn signal, the position light switch is connected to the position light, the front work light switch is connected to the position light and the front work light, the rear work light switch is connected to the rear work light, the warning light switch is connected to the warning light, and the position light switch, front work light switch, rear work light switch and warning light switch are also connected in parallel to fuse F9.

[0020] The effects provided in the content of the utility model are only the effects of the embodiments, rather than all the effects of the utility model. The above technical solution has the following advantages:

[0021] The utility model integrates the VCU, DC converter, walking MCU and lifting MCU into a whole by setting an all-in-one controller, reducing the connection of high-voltage wire harnesses and lowering the plug-in cost. It also uses a high voltage of 316.8V, which is higher than the voltage of traditional controllers, for control power supply, thereby improving control efficiency and reducing energy loss, making the forklift have better performance, longer service life, and improved economy. At the same time, it improves the charging effect and has better practicality. By setting up dual heat dissipation of water pump and fan, the heat dissipation efficiency is improved and the power loss is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation to the present invention.

[0023] Figure 1 This is a connection diagram of a control system according to an embodiment of the present invention;

[0024] Figure 2 This is a circuit connection diagram of an all-in-one controller according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the circuit connection between the charging station and the BMS according to an embodiment of the present utility model;

[0026] Figure 4This is a schematic diagram of the circuit connections of the brake assembly and the reverse assembly according to an embodiment of the present utility model;

[0027] Figure 5 This is a schematic diagram of the circuit connection of the starting switch unit according to an embodiment of the present utility model;

[0028] Figure 6 This is a schematic diagram of the circuit connection of the fan according to an embodiment of the present utility model;

[0029] Figure 7 This is a schematic diagram of the circuit connection between the instrument cluster and the OBD according to an embodiment of the present utility model;

[0030] Figure 8 This is a schematic diagram of circuit connections of part of the display unit according to an embodiment of the present invention. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0032] like Figures 1-8 As shown, the utility model provides a technical solution:

[0033] An electric forklift control system includes a battery and a controller. The battery is connected to the controller. The battery includes a high-voltage lithium battery and a storage battery. The high-voltage lithium battery is used to power the controller for control, and the storage battery is used to power the controller for starting. The controller is an all-in-one controller, including a VCU (vehicle controller), a DC converter, a travel MCU (microcontroller unit) and a lift MCU. The VCU is connected to a gear unit, a control unit, a brake unit, a cooling unit, a communication unit and a seat, and is used for overall control of the system. The DC converter is used to charge the battery and supply power from the battery to the entire vehicle. The travel MCU is connected to the travel motor for controlling the movement of the forklift, and the lift MCU is connected to the lift motor for controlling the movement of the forklift working arm; the charging unit includes a charging base and a BMS (battery management system). The BMS is connected to an external charging device through the charging base and can manage the battery charging status; a starting switch unit is connected to the controller and is used to start system operation; and a display unit is connected to the brake unit and the gear unit and is used to display the current movement status of the forklift.

[0034] In this embodiment, the high-voltage lithium battery uses 316.8V high voltage to power the controller, providing a 316.8V high-voltage line; the battery uses a 12V lead-acid battery to power the controller startup, providing a 12V low-voltage line; the positive pole of the battery is connected to the fuse MF1 and the fuse MF2, the other end of the fuse MF1 is connected to the controller to protect the controller, and the other end of the fuse MF2 is connected to the low-voltage line to provide low-voltage power.

[0035] In this embodiment, an ON circuit is also included, which is connected to the positive end of the low-voltage circuit through a starting switch unit, and is used to carry 12V low-voltage positive electricity on the ON circuit through the starting switch unit, so that the display unit will be powered only after the system is started, avoiding waste of electricity and being more economical; the starting switch unit includes a key switch S7, an emergency stop switch S8, a password lock and a starting relay RY1. The key switch is connected in series with the emergency stop switch and the password lock. The other end of the password lock is connected to ports 85 and 86 of the starting relay RY1. The other end of the emergency stop switch S8 is connected to the fuse F10 and then to the positive pole of the low-voltage circuit. Port 85 of the starting relay RY1 is also connected to the negative pole of the low-voltage circuit. Port 30 of the starting relay RY1 is connected to the positive pole of the low-voltage circuit. Port 87 of the starting relay RY1 is connected to the ON circuit. By turning on the key switch S7 and the password lock, power is supplied between ports 85 and 86 of the starting relay RY1, and then port 30 and port 87 of the starting relay RY1 are connected to supply 12V positive electricity to the ON circuit.

[0036] In this embodiment, the gear unit includes a forward gear switch and a reverse gear switch, and the forward gear switch and the reverse gear switch are connected in parallel with the fuse F5, and the other end of the fuse F5 is connected to the ON line. The fuse F5 is a common fuse for the forward gear switch and the reverse gear switch; it also includes a reverse light switch, and the reverse light switch is connected to the fuse F6 and the display unit, and the other end of the fuse F6 is connected to the ON line. Preferably, the forward gear switch, the reverse gear switch and the reverse light switch use a combination switch, and the forward gear switch and the reverse gear switch will not be connected at the same time, while the reverse gear switch and the reverse light switch are connected at the same time.

[0037] In this embodiment, the control unit includes an accelerator pedal and a control switch group. The accelerator pedal is connected to the controller for controlling the moving speed of the forklift. The accelerator pedal includes a variable resistor RT1 and one end of the accelerator switch S1. One end of the variable resistor RT1 is connected in parallel with the controller and the throttle switch S1. The other two ends of the variable resistor RT1 are connected to the controller. The other end of the throttle switch S1 is connected to the controller to facilitate the control of the accelerator pedal, avoid accidents, and improve safety; the control switch group includes a tilt switch S2, a lifting switch S3, and a side shift switch S4. One end of the tilt switch S2, the lifting switch S3, and the side shift switch S4 are all connected to the controller, and the other end is connected in parallel with the fuse F11. The fuse F11 is a common fuse. The other end of the fuse F11 is connected to the ON line, which is used to give the controller a signal to control the movement of the lifting motor to move the forklift working arm.

[0038] In this embodiment, the braking unit includes a brake switch S5 and a handbrake switch S6. The brake switch is connected to a fuse F6. The fuse F6 is a common fuse for braking and reversing and is not directly controlled by a relay. One end of the handbrake switch S6 is connected to the controller, and the other end is connected to the negative pole of the low-voltage line. After the handbrake is pulled, the forklift will no longer move, thereby improving safety.

[0039] In this embodiment, the cooling unit includes a water pump and a fan, wherein port 4 of the water pump is connected to port 87 of the water pump relay RY2, port 3 of the water pump is connected to the controller, port 1 of the water pump is grounded, port 85 of the water pump relay RY2 is connected to the controller, port 86 of the water pump relay RY2 is connected to one end of the fuse F13, the other end of the fuse F13 is connected to the ON line, port 30 of the water pump relay RY2 is connected to one end of the fuse F8, the other end of the fuse F8 is connected to the positive pole of the low-voltage line; the positive pole of the fan is connected to port 87 of the fan high-speed relay RY5 and the fan low-speed relay Port 87 of electrical appliance RY6, the negative pole of the fan is connected to port 86 of fan high-speed relay RY5, port 86 of fan low-speed relay RY6 and the negative pole of the low-voltage line, port 30 of fan high-speed relay RY5 and port 30 of fan low-speed relay RY6 are connected to each other and one end of fuse F4 in parallel, the other end of fuse F4 is connected to the positive pole of the low-voltage line, port 85 of fan high-speed relay RY5 and port 85 of fan low-speed relay RY6 are connected to the controller, which is used to receive controller signals to control the fan to rotate at high or low speed, facilitate heat dissipation and save energy, and has good practicality.

[0040] In this embodiment, the communication unit includes an OBD (on-board diagnostic system), which is used to connect to an external computer to read and write the program of the vehicle controller. A common model on the market can be used. The OBD port A16 is connected to one end of the fuse F14, and the other end of the fuse F14 is connected to the positive pole of the low-voltage line. The OBD includes communication ports A1 and A9, driving debugging ports A15 and A7, and lifting debugging ports A12 and A13, which are used to connect to the vehicle port, driving debugging port and lifting debugging port on the controller to write the control program into the controller. The OBD ports A4 and A5 are connected in parallel to the negative pole of the low-voltage line.

[0041] In this embodiment, port A2 of the BMS is connected to one end of the fuse F0, the other end of the fuse F0 is connected to the positive electrode of the low-voltage line, port A3 of the BMS is connected to the negative electrode of the low-voltage line, port A13 of the BMS is connected to one end of the fuse F2 and the controller, the other end of the fuse F2 is connected to the ON line, the BMS includes a charging port, a temperature port and a body port, the charging port includes ports A6, A17, A10, A11, DC1 and DC2 of the BMS, the temperature port includes ports A15, A16, A9 and A12 of the BMS, the body port includes ports A4 and A5 of the BMS, and the connecting line connecting A4 and A5 is a twisted pair, port B1 of the BMS is connected to the positive electrode of the high-voltage line, port B2 of the BMS is connected to the negative electrode of the high-voltage line, and the connection between the charging base and the BMS is a conventional connection. Specifically, the high-voltage positive port DC1 of the charging base is connected to port DC1 of the BMS, and the high-voltage negative port of the charging base is connected to the DC2 is connected to port DC2 of the BMS, the 12V positive port A1 of the charging base is connected to port A6 of the BMS and the controller, the 12V negative port A2 of the charging base is connected to the negative pole of the low-voltage line, port 3 of the charging base is grounded, port A5 of the charging base is connected to port A17 of the BMS, port A3 of the charging base is connected to port A10 of the BMS, port A4 of the charging base is connected to port A11 of the BMS, port A6 of the charging base is connected to the temperature negative ports A9 and A12 of the BMS, port A7 of the charging base is connected to the positive port A16 of temperature 2 of the BMS, and port A8 of the charging base is connected to the positive port A15 of temperature 1 of the BMS. The BMS also includes an interlock output port A18 and an interlock input port A20, which are connected to the controller and the seat. The seat has a switch that is turned on or off depending on whether there is someone on the seat, so that the system can only operate normally when there is someone on the seat, thereby improving safety.

[0042] In this embodiment, the display unit includes a brake assembly, a reverse assembly, a combination instrument, a light switch assembly and a warning assembly; the brake assembly includes a brake light L1 and a brake light L2, the brake light L1 and the brake light L2 are connected in parallel, one end is connected to the brake switch S5, and the other end is connected to the negative electrode of the low-voltage line, so that the brake light L1 and the brake light L2 are lit after the brake switch S5 is closed; the reverse assembly includes a reverse light L3, a reverse light L4 and a buzzer BZ1, the reverse light L3, the reverse light L4 and the buzzer BZ1 are connected in parallel, one end is connected to the reverse gear switch, and the other end is connected to the negative electrode of the low-voltage line, so that the lights are on when the reverse gear switch is closed. Lights and alarms; the light switch assembly includes a flasher FL1, a left turn switch, a right turn switch, a position light switch, a front working light switch, a rear working light switch S10 and a warning light switch S11. The left turn switch, the right turn switch, the position light switch and the front working light switch use combination switches commonly used on the market. The warning assembly includes a horn switch S9, a horn SP1, a left turn light L5, a right turn light L6, a position light L7, a front working light L8, a rear working light L9 and a warning light L10. The horn switch S9 and the horn SP1 are connected through a horn relay RY4, and the horn relay RY4 is connected to a fuse. One end of F1 and the other end of fuse F1 are connected to the ON circuit. Port B of flasher FL1 is connected to fuse F12 and then to the ON circuit. Both ends of the left turn switch are connected to the left turn signal L5 and port L of flasher FL1. Both ends of the right turn switch are connected to the right turn signal L6 and port L of flasher FL1. Both ends of the position light switch are connected to position light L7 and port 30 of flasher relay RY7. The front work light switch is connected to position light L7 and port 30 and port 86 of flasher relay RY7. Port 85 of flasher relay RY7 is connected to port E of flasher FL1 and the negative pole of the low-voltage circuit. Port 87 of relay RY7 is connected to the front work light L8, and port 30 of flasher relay RY7 is also connected to fuse F9 and then to the ON line. The two ends of the rear work light switch S10 are connected to the rear work light L9 and fuse F9. The two ends of the warning light switch S11 are connected to the warning light L10 and fuse F9, and fuse F9 is connected to the ON line; ports A11 and A14 of the instrument cluster are connected in parallel and then connected to fuse F5. Fuse F5 is a shared fuse. Ports A2 and A6 of the instrument cluster are connected in parallel and then connected to the negative pole of the low-voltage line. Ports A3 and A13 of the instrument cluster are connected to the controller for displaying information such as vehicle speed.

[0043] The port B1 of the multi-in-one controller is the high-voltage positive port, which is connected to the positive pole of the high-voltage line. The port B2 is the high-voltage negative port, which is connected to the negative pole of the high-voltage line to provide control power for the controller. The port 4M is the normal power for the controller to work. After connecting the fuse F7, it is connected to the positive pole of the low-voltage line. The port 1J is the IG wake-up port, which is used to receive the signal of the controller working after turning on the key. The port 1J is connected to the fuse F2, and the fuse F2 is a common insurance. The port 1K of the multi-in-one controller is connected to the port A1 of the charging base to receive the charging signal. The port 3K of the multi-in-one controller is connected to the forward gear switch to receive the forward gear signal. The port 2J is connected to the reverse gear switch to receive the reverse gear signal. The port 4G is connected to the throttle switch S1 to receive the throttle switch signal. The port 4J is connected to the The positive terminal of the variable resistor RT1 is used to supply a 12V throttle power supply, port 4K is connected to the negative terminal of the variable resistor RT1, port 4H is connected to the variable terminal of the variable resistor RT1 for receiving the throttle signal, port 3H is connected to the tilt switch S2, port 2K is connected to the lifting switch S3, and port 3E is connected to the side shift switch S4, so that the controller receives different action signals to control the action of the forklift's working arm. It should be understood that the forklift not only has lifting action, but also includes side shift and tilting action. Therefore, the lifting MCU and lifting motor are just names and do not limit their functions. That is, the lifting MCU here not only controls the lifting action, but also controls the side shift and tilting action. The lifting motor here also means that it can not only lift the forklift's working arm, but also can side shift and tilt the forklift's working arm.Port 1H of the all-in-one controller is connected to the brake switch for receiving the brake signal, port 1L is connected to port 85 of the water pump relay RY2 for controlling the rotation of the water pump, port 2G and port 1C are connected to port 3 of the water pump for receiving the status information of the water pump and controlling the speed of the water pump respectively, and can control the speed of the water pump according to the temperature of the system, port 2C of the all-in-one controller is connected to port 85 of the descending solenoid valve relay RY3, port 86 and port 30 of the descending solenoid valve relay RY3 are connected in parallel to one end of the fuse F13, the other end of the fuse F13 is connected to the ON line, and the fuse F13 shares a common fuse, and port 87 of the descending solenoid valve relay RY3 is connected to the descending solenoid valve The descending solenoid valve is used to protect the forklift so that the key-opening system will execute the action, which is safer. It is a conventional setting. Port 24K of the multi-in-one controller is connected to fuse F2, which is shared with BMS to receive the ON wake-up signal. Ports 21M and 22M of the multi-in-one controller are used as the normal positive pole ports of the controller. After parallel connection, they are connected to fuse F3, and then connected to the positive pole of the low-voltage line. Ports 41L and 42L of the multi-in-one controller are used as the normal negative pole ports of the controller and are connected to the negative pole of the low-voltage line. Port 2A is connected to the handbrake switch S6 to receive the handbrake signal. Port 2L is used as the fan low-speed control port and is connected to port 85 of the fan low-speed relay RY6 to control the fan low speed. Rotation, port 2M is used as the fan high-speed control port, connected to port 85 of the fan high-speed relay RY5 to control the high-speed rotation of the fan and quickly dissipate heat. Ports 1A and 1B of the multi-in-one controller are body ports, connected to ports A4 and A5 of the BMS respectively, for communication with the BMS. Ports 24G and 23G of the multi-in-one controller are connected to the seats. Ports 21E and 21F of the multi-in-one controller are vehicle ports, connected to ports A1 and A9 of the OBD respectively. The lines of ports 21E and 21F are twisted pair cables, and are shielded by port 22D of the multi-in-one controller to improve the stability of data transmission. Ports 21C and 21D of the multi-in-one controller are for walking adjustment. The test ports are connected to OBD ports A15 and A7, respectively. Ports 21C and 21D are connected via twisted-pair cables, shielded by port 22C of the all-in-one controller. Ports 21A and 21B of the all-in-one controller are the lift debugging ports, connected to OBD ports A13 and A12, respectively. Ports 21A and 21B are connected via twisted-pair cables, shielded by port 22A of the all-in-one controller. The travel and lift motors are connected to the controller using conventional motor wiring, which will not be detailed here. Ports 21L and 22L of the all-in-one controller are both connected to the negative pole of the low-voltage line, used to share the line pressure between the controller and the negative pole of the low-voltage line through multiple lines.

[0044] Working principle: Turn on the key switch to wake up the system and power the battery, so that the all-in-one controller starts up. The DC converter can supply 12V electricity to the entire vehicle and charge the battery; by stepping on the accelerator pedal to transmit a signal to the VCU, the VCU controls the travel MCU to run the travel motor to realize the movement of the vehicle; the switch corresponding to the control switch group is closed, and a signal is transmitted to the VCU, and the VCU controls the lift MCU to run the lift motor to realize lifting, side shifting and tilting actions.

[0045] Anything not described in detail in the present invention is a conventional technical means known to those skilled in the art.

[0046] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0047] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more such features. In the description of this utility model, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0048] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

[0049] Finally, it should be noted that the above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art will be able to modify the technical solutions described in the aforementioned embodiments or replace some of the technical features therein with equivalents. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. An electric forklift control system, comprising a battery and a controller, wherein the battery is connected to the controller, and is characterized in that: The battery includes a high-voltage lithium battery and a storage battery. The high-voltage lithium battery is used for control power supply, and the storage battery is used for starting power supply. The controller is an all-in-one controller, including a VCU, a DC converter, a travel MCU, and a lift MCU. The VCU is connected to the gear unit, control unit, brake unit, cooling unit, communication unit, and seat for overall control of the system. The DC converter is used to charge the battery and supply the battery power to the entire vehicle. The travel MCU is connected to the travel motor to control the movement of the forklift. The lift MCU is connected to the lift motor to control the movement of the forklift's working arm. The charging unit includes a charging base and a BMS. The BMS is connected to an external charging device through the charging base to manage the battery charging status; Start the switch unit, connected to the controller, to start the system operation; The display unit is connected to the brake unit and the gear unit and is used to display the current moving status of the forklift.

2. The electric forklift control system according to claim 1, characterized in that: The high-voltage lithium battery uses 316.8V high voltage to power the controller, and the battery uses 12V lead-acid battery to power the controller startup. The battery is connected to fuse MF1 and fuse MF2.

3. The electric forklift control system according to claim 2, characterized in that: The gear unit includes a forward gear switch and a reverse gear switch, which are connected in parallel with fuse F5; and also includes a reverse light switch, which is connected to fuse F6 and the display unit.

4. The electric forklift control system according to claim 3, characterized in that: The control unit includes an accelerator pedal and a control switch group. The accelerator pedal is connected to the controller and is used to control the forklift's moving speed. The control switch group includes a tilt switch, a lifting switch, and a side shift switch. The tilt switch, lifting switch, and side shift switch are connected in parallel with fuse F11 to control the movement of the lifting motor, thereby moving the forklift's working arm.

5. The electric forklift control system according to claim 4, characterized in that: The brake unit includes a brake switch and a handbrake switch. The brake switch is connected to fuse F6. Fuse F6 is a common insurance for braking and reversing and is not directly controlled by a relay.

6. The electric forklift control system according to claim 5, characterized in that: The cooling unit includes a water pump and a fan. The water pump is connected to the water pump relay, which is connected to the controller, fuse F13, and fuse F8. The fan is connected to the fan high-speed relay and the fan low-speed relay. The fan high-speed relay and the fan low-speed relay are connected to each other and in parallel with fuse F4. The fan high-speed relay and the fan low-speed relay are connected to the controller.

7. The electric forklift control system according to claim 6, characterized in that: The communication unit includes OBD, which is connected to fuse F14. The OBD is provided with a travel debugging port and an oil pump debugging port. The controller is provided with a body port, a vehicle port, a travel debugging port and a lifting debugging port for writing the control program into the controller.

8. The electric forklift control system according to claim 7, characterized in that: The BMS is connected to fuse F0 and fuse F2. The BMS includes a charging port, a temperature port, and a vehicle body port. The charging port and the temperature port are both connected to the charging base.

9. The electric forklift control system according to claim 8, characterized in that: The starting switch unit includes a key switch, an emergency stop switch, a password lock and a starting relay. The key switch is connected in series with the emergency stop switch and the password lock, the password lock is connected to the starting relay, and the emergency stop switch is connected to fuse F10.

10. The electric forklift control system according to claim 9, characterized in that: The display unit includes a brake assembly, a reverse assembly, a combination instrument, a light switch assembly and a warning assembly; The brake assembly includes a brake light L1 and a brake light L2, and the brake light L1 and the brake light L2 are connected in parallel to the brake switch; The reversing assembly includes a reversing light L3, a reversing light L4 and a buzzer, and the reversing light L3, the reversing light L4 and the buzzer are connected in parallel to the reverse gear switch; The light switch assembly includes a flasher, a left turn switch, a right turn switch, a position light switch, a front work light switch, a rear work light switch and a warning light switch. The warning assembly includes a horn switch, a horn, a left turn light, a right turn light, a position light, a front work light, a rear work light and a warning light. The horn switch and the horn are connected through a relay, the relay is connected to fuse F1, the flasher is connected to fuse F12, the left turn switch is connected to the left turn light, the right turn switch is connected to the right turn light, the position light switch is connected to the position light, the front work light switch is connected to the position light and the front work light, the rear work light switch is connected to the rear work light, the warning light switch is connected to the warning light, and the position light switch, the front work light switch, the rear work light switch and the warning light switch are also connected in parallel to fuse F9.

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