24V plumbic acid forklift light control system

Abstract

The utility model relates to the technical field of forklifts, and discloses a 24V lead-acid forklift light control system which comprises an energy storage power supply, a key switch (KS), a relay, a main contactor, a vehicle control unit, a light switch (K3) and a light system. The vehicle control unit is provided with a KSI port, an NMC port, a PMC port, a positive pole B + port, a negative pole B-port and a fuse F1; the fuse F1 is fixedly connected with the positive electrode B + port, the main contactor comprises a coil L1 and a switch K1, the coil L1 is electrically connected between the NMC port and the PMC port, the positive electrode of the energy storage power supply is connected with the fuse F1 of the vehicle control unit through the switch K1 of the main contactor, the relay is provided with a switch K2 and a coil L2, and the switch K2 is electrically connected with the coil L2. And the output port of the key switch is also connected with the input port of the coil L2. According to the utility model, the lighting system of the whole vehicle can be electrified to work under the control of the key switch, so that the over-discharge fault of the lead-acid battery caused by forgetting to turn off the lighting switch can be effectively avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of fork truck, especially 24V lead acid fork truck light control system. BACKGROUND

[0002] The original 24V lead acid fork truck directly uses the light system of 24V working voltage, and no longer controls through voltage conversion of DC-DC converter, reduces the use cost, and simultaneously because the key switch cannot directly bear the high power demand of the light system work, so the existing 24V lead acid fork truck light switch is directly connected with the positive and negative poles of the energy storage power supply, is not controlled by the key switch, there is the phenomenon that the key switch is not closed, the driver forgets to close the light switch, and the whole vehicle light system works alone and lights up, long-time work can cause the overdischarge problem of the energy storage battery, causes the irreparable loss of the customer, there is also the scheme that the light switch is connected behind the main contactor of the whole vehicle, when the key switch is closed, the light system can normally work after the main contactor is opened and closed by the whole vehicle controller work control, but there is the problem of the fault that the light switch is closed in advance, the main contactor precharge voltage is pulled down, and the whole vehicle controller precharge fails and cannot be powered on before the key switch is closed.

[0003] To solve the above problems, the 24V lead acid fork truck light control system is designed. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at solving one of the technical problems in the related art at least to some extent. Therefore, one purpose of the utility model is to propose the 24V lead acid fork truck light control system, so that the whole vehicle light system can work under the control of the key switch, the overdischarge fault of the lead acid battery caused by forgetting to close the light switch can be effectively avoided, and the phenomenon that the whole vehicle cannot normally precharge and work caused by pulling down the precharge voltage of the main contactor of the whole vehicle can also be avoided.

[0005] The 24V lead acid fork truck light control system according to the utility model comprises an energy storage power supply, a key switch (KS), a relay, a main contactor, a whole vehicle controller, a light switch (K3) and a light system.

[0006] The whole vehicle controller is provided with a KSI port, an NMC port, a PMC port, a positive pole B+ port, a negative pole B- port and a fuse F1, and the fuse F1 is fixedly connected with the positive pole B+ port.

[0007] The main contactor comprises a coil L1, a switch K1 and a fuse F1, the coil L1 is electrically connected between the NMC port and the PMC port, and the positive pole of the energy storage power supply is connected with the fuse F1 of the whole vehicle controller through the switch K1 of the main contactor.

[0008] The relay is provided with a switch K2 and a coil L2, and the key switch output port is also connected with the coil L2 input port;

[0009] The positive pole of the energy storage power supply is connected with the KSI port of the vehicle controller in sequence through the key switch (KS) and the switch K2 of the relay; the positive pole of the energy storage power supply is also connected with the input end of the light switch (K3) in sequence through the switch K2 of the relay, and the output end of the light switch (K3) is connected with the input end of the light system; the negative pole of the energy storage power supply is connected with the coil L2 output end of the relay and the negative pole B-port of the vehicle controller in sequence, and the negative pole of the energy storage power supply is connected with the output port of the light system.

[0010] Preferably, the key switch output port is also connected with the coil L2 input port of the relay.

[0011] Preferably, the output end of the light switch (K3) is connected with the input end of the light system.

[0012] Preferably, the output voltage of the energy storage power supply is 24V, and the excitation voltage of the relay is 24V.

[0013] The beneficial effects of the utility model are: the 24V relay controlled by the key switch is added in the circuit between the light switch (K3) and the positive pole of the energy storage power supply, so that the light system of the vehicle can work under the control of the key switch, the over-discharge failure of the lead-acid battery caused by the failure of turning off the light switch can be avoided, the pre-charge voltage of the main contactor can not be pulled down, the vehicle cannot be pre-charged normally, and the light system is more reasonably optimized and designed, and the vehicle is normally, safely, efficiently and reliably used. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model provides a 24V lead-acid forklift light control system's circuit schematic diagram.

[0015] In the drawing: 1, energy storage power supply;2, key switch (KS);3, relay;4, main contactor;5, vehicle controller;6, light switch (K3);7, light system. DETAILED DESCRIPTION

[0016] Referring to Figure 1 , the 24V lead-acid forklift light control system includes energy storage power supply 1, key switch (KS) 2, relay 3, main contactor 4, vehicle controller 5, light switch (K3) 6, light system 7;

[0017] The whole vehicle controller 5 is provided with a KSI port, an NMC port, a PMC port, a positive B+ port, a negative B- port and a fuse F1, and the fuse F1 is fixedly connected with the positive B+ port;

[0018] The main contactor 4 comprises a coil L1, a switch K1 and a fuse F1, the coil L1 is electrically connected between the NMC port and the PMC port, and the positive pole of the energy storage power supply 1 is connected with the fuse F1 of the whole vehicle controller 5 through the switch K1 of the main contactor 4;

[0019] The relay 3 is provided with a switch K2 and a coil L2, and the key switch output port is also connected with the coil L2 input port;

[0020] The positive pole of the energy storage power supply 1 is connected with the KSI port of the whole vehicle controller 5 through the key switch (KS) 2 in sequence; the positive pole of the energy storage power supply 1 is also connected with the input end of the light switch (K3) 6 through the switch K2 of the relay 3 in sequence, the output end of the light switch (K3) 6 is connected with the input end of the light system 7; the negative pole of the energy storage power supply 1 is connected with the coil L2 output end of the relay 3 and the negative B- port of the whole vehicle controller 5 in sequence, and the negative pole of the energy storage power supply 1 is connected with the output port of the light system 7.

[0021] The key switch output end is also connected with the coil L2 input end of the relay 3.

[0022] The output end of the light switch (K3) 6 is connected with the input end of the light system 7.

[0023] The output voltage of the energy storage power supply 1 is 24V, and the excitation voltage of the relay 3 is 24V.

[0024] When the device is used, when the customer uses the forklift, the driver first closes the key switch (KS) 2, the positive electrode of the energy storage power supply 1 is connected in turn through the key switch (KS) 2 and the key power-on port KSI of the vehicle controller 5; the vehicle controller 5 is powered on to start self-checking and pre-charging, when the self-checking has no fault and the pre-charging voltage meets the requirements, the vehicle controller 5 generates a voltage difference through the control of the main contactor 4 coil L1 between the NMC and PMC ports, so that the main contactor 4 switch K1 connected through the fuse F1 and the positive electrode terminal "B+" of the vehicle controller 5 is attracted and turned on, and the vehicle can be normally driven and lifted The door frame and other work; after the key switch is closed, the 24V relay 3 coil L2 is powered on and turned on, the switch K2 is closed, the positive electrode of the energy storage power supply 1 is connected in turn through the switch port K2 of the 24V relay 3 and the input end of the light switch (K3) 6, and the input power is provided to the light switch, the output end of the light switch (K3) 6 is connected with the input end of the light system 7, when the driver uses the vehicle light, only need to manually operate to close the light switch (K3) 6, the light system 7 can be powered on and work; when the driver stops the vehicle work, disconnects the key switch, the key port of the vehicle controller 5 loses power and stops working, and then the main contactor 4 coil L1 loses power and disconnects the switch K1, and the 24V relay 3 coil L2 loses power and disconnects the switch K2, disconnects the vehicle power system power supply and the light system 7 power supply, even if the driver forgets to close the light switch, the vehicle light system 7 will not work, which ensures that the vehicle energy storage power supply 1 will not work again, which can effectively avoid the battery over-discharge fault caused by forgetting to close the light switch directly connected to the positive electrode of the energy storage power supply 1, and will not cause the phenomenon that the vehicle cannot work normally due to the existence of the main contactor 4 pre-charging voltage, which ensures the safe, efficient and reliable use of the vehicle.

Claims

1. A 24V lead-acid fork truck light control system characterized by: The energy storage power supply, a key switch (KS), a relay, a main contactor, a vehicle controller, a light switch (K3) and a light system are included. The vehicle controller is provided with a KSI port, an NMC port, a PMC port, a positive B+ port, a negative B- port and a fuse F1, and the fuse F1 is fixedly connected with the positive B+ port. The main contactor includes a coil L1 and a switch K1, the coil L1 is electrically connected between the NMC port and the PMC port, and the positive pole of the energy storage power supply is connected with the fuse F1 of the vehicle controller through the switch K1 of the main contactor. The relay is provided with a switch K2 and a coil L2, and the output port of the key switch is further connected with the input port of the coil L2. The positive pole of the energy storage power supply is connected with the KSI port of the vehicle controller through the key switch (KS) in sequence, and the positive pole of the energy storage power supply is further connected with the input end of the light switch (K3) through the switch K2 of the relay in sequence, the output end of the light switch (K3) is connected with the input end of the light system, the negative pole of the energy storage power supply is connected with the output end of the coil L2 of the relay and the negative B- port of the vehicle controller in sequence, and the negative pole of the energy storage power supply is connected with the output port of the light system.

2. The 24V lead-acid fork truck light control system of claim 1, wherein: The output port of the key switch is further connected with the input port of the coil L2 of the relay.

3. The 24V lead-acid fork truck light control system of claim 1, wherein: The output end of the light switch (K3) is connected with the input end of the light system.

4. The 24V lead-acid fork truck light control system of claim 1, wherein: The output voltage of the energy storage power supply is 24V, and the excitation voltage of the relay is 24V.

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