Automatic charging control circuit of AGV (Automatic Guided Vehicle)

Abstract

The utility model discloses an automatic charging control circuit for an AGV (Automatic Guided Vehicle). The automatic charging control circuit comprises a lithium battery, a charger, a brush block mechanism, a first relay and a photoelectric switch, the brush block mechanism is telescopically arranged on the charger, the charger is in signal connection with the brush block mechanism, the first relay is connected in series between the brush block mechanism and a first output port of the charger, and a coil end of the first relay is electrically connected with a second output end of the charger. The photoelectric switch is in signal connection with the first input end of the charger, and the photoelectric switch is used for receiving signals of the reflector of the AGV body after the AGV makes charging contact with the charger. The charger controls the brush block mechanism to stretch out after the photoelectric switch receives a signal of the reflector, so that the brush block mechanism is connected with the charging brush plate, and then the charger charges a lithium battery corresponding to the AGV. According to the utility model, the charging control convenience and accuracy of the AGV can be improved, and the charging efficiency of the AGV can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of AGV charging control, and more specifically, to an AGV trolley automatic charging control circuit. Background Art

[0002] AGV is characterized by autonomy and high efficiency. In actual on-site operations, high-intensity operations will be accompanied by a large reduction in battery power. In order to continue to ensure the efficiency of the operation, battery charging is particularly important. Compared with the time-consuming and labor-intensive traditional manual charging, automatic charging is more efficient and convenient. The existing AGV has the problem of unsuccessful charging due to inaccurate charging contact in automatic charging control. Therefore, how to conveniently and accurately control the automatic charging of AGV is of great significance. Utility Model Content

[0003] The utility model provides an automatic charging control circuit for an AGV trolley, which solves the problem that the charging control of the existing AGV trolley is inaccurate and inconvenient when the AGV trolley is automatically charged, can improve the convenience and accuracy of the charging control of the AGV trolley, and improve the charging efficiency of the AGV trolley.

[0004] In order to achieve the above objectives, the utility model provides the following technical solutions:

[0005] An automatic charging control circuit for an AGV, comprising: a lithium battery, a charger, a brush block mechanism, a first relay and a photoelectric switch;

[0006] The brush block mechanism is telescopically arranged on the charger, the charger is signal-connected to the brush block mechanism, and the brush block mechanism is integrated with a positive contact, a negative contact, a CANH contact, and a CANL contact;

[0007] The first relay is connected in series between the brush block mechanism and the first output port of the charger, and the coil end of the first relay is electrically connected to the second output end of the charger;

[0008] The photoelectric switch is connected to the first input terminal of the charger by signal, and the photoelectric switch is used to receive the AGV body reflector signal after the AGV trolley is in charging contact with the charger;

[0009] The lithium battery is connected to the charging brush plate signal of the AGV trolley. After the photoelectric switch receives the reflector plate signal, the charger controls the brush block mechanism to extend so that the brush block mechanism is connected to the charging brush plate, and then the charger charges the lithium battery corresponding to the AGV trolley.

[0010] Preferably, it also includes: a vehicle controller and a key switch;

[0011] The vehicle controller is electrically connected to the lithium battery, and the key switch is connected in series between the positive electrode of the lithium battery and the power access terminal of the vehicle controller;

[0012] When the key switch is closed, the vehicle controller controls the AGV to be in operation state;

[0013] When the key switch is turned off, the vehicle controller controls the AGV to be in a shutdown state.

[0014] Preferably, the charging brush plate is also provided with a positive contact, a negative contact, a CANH contact and a CANL contact, and corresponding positive connecting wires, negative connecting wires, CANH signal wires and CANL signal wires are provided between the charging brush plate and the lithium battery;

[0015] After the brush block mechanism contacts the corresponding contact points of the charging brush plate, the signal connection between the charger and the lithium battery is turned on.

[0016] Preferably, it further comprises: a second relay;

[0017] The second relay is arranged on the CANH signal line, the second relay is connected in series between the CANH contact of the charging brush plate and the lithium battery, and the coil end of the second relay is electrically connected to the first output end of the vehicle controller;

[0018] The second relay is used to turn on or off the CANH signal line between the charging brush plate and the lithium battery.

[0019] Preferably, it further comprises: a third relay;

[0020] The third relay is arranged on the CANL signal line, the third relay is connected in series between the CANL contact of the charging brush plate and the lithium battery, and the coil end of the third relay is electrically connected to the second output end of the vehicle controller;

[0021] The third relay is used to turn on or off the CANL signal line between the charging brush plate and the lithium battery.

[0022] Preferably, the second relay and the third relay are both normally open relays.

[0023] Preferably, it also includes: a fuse;

[0024] The fuse is connected in series between the key switch and the power access terminal of the vehicle controller, and is used for current limiting protection of the electrical connection between the lithium battery and the vehicle controller.

[0025] Preferably, it also includes: a power sensor;

[0026] The power sensor is connected to the vehicle controller signal, and the power sensor is used to detect the remaining power of the lithium battery;

[0027] The vehicle controller sends a charging completion CAN message when the remaining power reaches 100%;

[0028] After receiving the charging completion CAN message, the charger controls the first relay to be disconnected, so that the brush block mechanism retracts, and stops the charger from charging the lithium battery.

[0029] Preferably, the first relay is a normally closed relay.

[0030] The utility model provides an automatic charging control circuit for an AGV trolley, which receives the signal of the AGV body reflector through a photoelectric switch, and controls the on and off of the first relay to make the brush block mechanism dock with the AGV charging brush plate, so as to realize the automatic charging of the lithium battery by the charger. The utility model solves the problem that the charging control of the existing AGV trolley is inaccurate and inconvenient when the AGV trolley is automatically charged, and can improve the convenience and accuracy of the AGV trolley charging control, and improve the charging efficiency of the AGV trolley. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific embodiments of the present utility model, the drawings required for use in the embodiments will be briefly introduced below.

[0032] Figure 1 The utility model provides a schematic diagram of an automatic charging control circuit for an AGV vehicle. DETAILED DESCRIPTION

[0033] In order to enable those skilled in the art to better understand the solutions of the embodiments of the present utility model, the embodiments of the present utility model are further described in detail below in conjunction with the accompanying drawings and implementation methods.

[0034] In view of the problems of inaccurate control and inconvenience in automatic charging of current AGV trolleys, the utility model provides an automatic charging control circuit for AGV trolleys, which solves the problems of inaccurate charging control and inconvenience in automatic charging of existing AGV trolleys, can improve the convenience and accuracy of charging control of AGV trolleys, and improve the charging efficiency of AGV trolleys.

[0035] like Figure 1As shown, an automatic charging control circuit for an AGV trolley includes: a lithium battery 8, a charger 1, a brush block mechanism 6, a first relay 5 and a photoelectric switch 1. The brush block mechanism 6 is retractably arranged on the charger 1, and the charger 1 is signal-connected to the brush block mechanism 6. The brush block mechanism 6 integrates a positive contact, a negative contact, a CANH contact and a CANL contact. The first relay 5 is connected in series between the brush block mechanism 6 and the first output port of the charger 1, and the coil end 5-1 of the first relay is electrically connected to the second output end of the charger 1. The photoelectric switch 4 is signal-connected to the first input end IN1 of the charger, and the photoelectric switch 4 is used to receive the AGV body reflector signal after the AGV trolley is in charging contact with the charger 1. The lithium battery 8 is signal-connected to the charging brush plate of the AGV trolley. After the photoelectric switch 4 receives the reflector signal, the charger 1 controls the brush block mechanism 6 to extend, so that the brush block mechanism 6 is connected to the charging brush plate, and then the charger charges the lithium battery corresponding to the AGV trolley.

[0036] Specifically, the charger 1 is externally connected to a 220V power supply, and the brush block mechanism 6 integrates positive and negative electrodes and four wires, CANH and CANL, and the brush block mechanism 6 is extended or retracted by the charger 1. The coil end 5- of the first relay is electrically connected to the second output port OUT2 of the charger 1, the input end of the first relay 5 is connected to the first output port OUT1 of the charger 1, and the output end of the first relay 5 is connected to the input end of the brush block mechanism 6. When the photoelectric switch receives the AGV body reflector signal, the first relay 5 is controlled to be turned on, so that the electrical connection between the charger and the brush block mechanism is turned on, and the brush block mechanism is controlled to extend and connect to the charging brush plate of the AGV, so that the charger is connected to the positive and negative electrodes of the lithium battery and the CAN bus is connected, and automatic charging is realized after the CAN communication between the charger and the AGV car is normal. This circuit can improve the convenience and accuracy of the charging control of the AGV car, and improve the charging efficiency of the AGV car.

[0037] The circuit also includes: a vehicle controller 10 and a key switch 7; the vehicle controller 10 is electrically connected to the lithium battery 8, and the key switch 7 is connected in series between the positive electrode of the lithium battery 8 and the power access terminal of the vehicle controller 10; when the key switch 7 is closed, the vehicle controller 10 controls the AGV trolley to be in a running state; when the key switch 7 is disconnected, the vehicle controller 10 controls the AGV trolley to be in a stopped state.

[0038] Furthermore, the charging brush plate is also provided with positive contacts, negative contacts, CANH contacts and CANL contacts, and corresponding positive connecting wires, negative connecting wires, CANH signal wires and CANL signal wires are provided between the charging brush plate and the lithium battery. After the brush block mechanism contacts the corresponding contacts of the charging brush plate, the signal connection between the charger and the lithium battery is turned on.

[0039] The circuit also includes: a second relay 2; the second relay 2 is arranged on the CANH signal line, the second relay 2 is connected in series between the CANH contact of the charging brush board and the lithium battery, and the coil end 2-1 of the second relay is electrically connected to the first output end OUT1 of the vehicle controller. The second relay 2 is used to turn on or off the CANH signal line between the charging brush board and the lithium battery.

[0040] The circuit also includes: a third relay 3; the third relay 3 is arranged on the CANL signal line, the third relay 3 is connected in series between the CANL contact of the charging brush board and the lithium battery, and the coil end 3-1 of the third relay is electrically connected to the second output end OUT2 of the vehicle controller. The third relay 3 is used to turn on or off the CANL signal line between the charging brush board and the lithium battery.

[0041] Furthermore, the second relay 2 and the third relay 3 are both normally open relays.

[0042] The circuit also includes: a fuse 9; the fuse 9 is connected in series between the key switch and the power access terminal of the vehicle controller 10, and is used for current limiting protection of the electrical connection between the lithium battery and the vehicle controller.

[0043] The circuit also includes: a power sensor (not shown in the figure); the power sensor is connected to the vehicle controller signal, and the power sensor is used to detect the remaining power of the lithium battery; the vehicle controller sends a charging completion CAN message when the remaining power reaches 100%; after receiving the charging completion CAN message, the charger controls the first relay to disconnect, so that the brush block mechanism retracts, and stops the charger from charging the lithium battery.

[0044] Furthermore, the first relay 5 is a normally closed relay.

[0045] In practical applications, such as Figure 1As shown, the AGV runs to the automatic charging station, the vehicle controller VCU issues a charging task, the output ports OUT1 and OUT2 of the vehicle controller VCU output high level, the coil end 2-1 of the second relay and the coil end 3-1 of the third relay are energized, the second relay 2 and the third relay 3 are closed, and the CANH and CANL on the AGV charging brush plate are connected to the CANH and CANL of the lithium battery. At the same time, after the AGV runs to the automatic charging station, the photoelectric switch 4 receives the signal from the AGV body reflector and is triggered, the first input terminal IN1 of the charger 1 is low level, and the first output terminal OUT1 is controlled to be high level, the brush block mechanism 6 is powered and extends the brush block to dock with the AGV charging brush plate, the lithium battery 8 CANH and CANL are connected to the charger 1 CANH and CANL, the CAN communication is normal, and the automatic charging is normal.

[0046] After the AGV is fully charged, the charger 1 receives the full charge signal of the lithium battery 8, and the charger 1 controls the output port OUT2 to be high level, the coil end 3-1 of the third relay is energized, and the third relay is disconnected. At this time, the brush block mechanism 6 loses power and retracts, and the automatic charging ends. After the AGV leaves the charging station, the photoelectric switch 4 does not receive the signal of the reflector and is no longer triggered. There is no input signal at the input port IN1 of the charger 1. The charger 1 controls the output ports OU1 and OUT2 to be low level, the coil end 3-1 of the third relay loses power, and the third relay closes again, waiting for the next AGV automatic charging.

[0047] It can be seen that the utility model provides an automatic charging control circuit for an AGV trolley, which receives the signal of the AGV body reflector through a photoelectric switch, and controls the on and off of the first relay to make the brush block mechanism dock with the AGV charging brush plate, thereby realizing the automatic charging of the lithium battery by the charger. The problem of inaccurate and inconvenient charging control when the existing AGV trolley is automatically charged is solved, and the convenience and accuracy of the AGV trolley charging control can be improved, and the charging efficiency of the AGV trolley is improved.

[0048] The above describes in detail the structure, features and effects of the utility model based on the embodiments shown in the drawings. The above is only a preferred embodiment of the utility model, but the utility model is not limited to the scope of implementation as shown in the drawings. Any changes made in accordance with the concept of the utility model, or modifications to equivalent embodiments with equivalent changes, which still do not exceed the spirit covered by the description and the drawings, should be within the protection scope of the utility model.

Claims

1. An AGV automatic charging control circuit, characterized in that: include: Lithium battery, charger, brush block mechanism, first relay and photoelectric switch; The brush block mechanism is telescopically arranged on the charger, the charger is signal-connected to the brush block mechanism, and the brush block mechanism is integrated with a positive contact, a negative contact, a CANH contact, and a CANL contact; The first relay is connected in series between the brush block mechanism and the first output port of the charger, and the coil end of the first relay is electrically connected to the second output end of the charger; The photoelectric switch is connected to the first input terminal of the charger by signal, and the photoelectric switch is used to receive the AGV body reflector signal after the AGV trolley is in charging contact with the charger; The lithium battery is connected to the charging brush plate signal of the AGV trolley. After the photoelectric switch receives the reflector plate signal, the charger controls the brush block mechanism to extend so that the brush block mechanism is connected to the charging brush plate, and then the charger charges the lithium battery corresponding to the AGV trolley.

2. The AGV automatic charging control circuit according to claim 1 is characterized in that: Also includes: Vehicle controller and key switch; The vehicle controller is electrically connected to the lithium battery, and the key switch is connected in series between the positive electrode of the lithium battery and the power access terminal of the vehicle controller; When the key switch is closed, the vehicle controller controls the AGV to be in operation state; When the key switch is turned off, the vehicle controller controls the AGV to be in a shutdown state.

3. The AGV automatic charging control circuit according to claim 2 is characterized in that: The charging brush plate is also provided with a positive contact, a negative contact, a CANH contact and a CANL contact, and corresponding positive connecting wires, negative connecting wires, CANH signal wires and CANL signal wires are provided between the charging brush plate and the lithium battery; After the brush block mechanism contacts the corresponding contact points of the charging brush plate, the signal connection between the charger and the lithium battery is turned on.

4. The AGV automatic charging control circuit according to claim 3 is characterized in that: Also includes: Second relay; The second relay is arranged on the CANH signal line, the second relay is connected in series between the CANH contact of the charging brush plate and the lithium battery, and the coil end of the second relay is electrically connected to the first output end of the vehicle controller; The second relay is used to turn on or off the CANH signal line between the charging brush plate and the lithium battery.

5. The AGV automatic charging control circuit according to claim 4 is characterized in that: Also includes: The third relay; The third relay is arranged on the CANL signal line, the third relay is connected in series between the CANL contact of the charging brush plate and the lithium battery, and the coil end of the third relay is electrically connected to the second output end of the vehicle controller; The third relay is used to turn on or off the CANL signal line between the charging brush plate and the lithium battery.

6. The AGV automatic charging control circuit according to claim 5 is characterized in that: The second relay and the third relay are both normally open relays.

7. The AGV automatic charging control circuit according to claim 6 is characterized in that: Also includes: fuse; The fuse is connected in series between the key switch and the power access terminal of the vehicle controller, and is used for current limiting protection of the electrical connection between the lithium battery and the vehicle controller.

8. The AGV automatic charging control circuit according to claim 7 is characterized in that: Also includes: Power sensor; The power sensor is connected to the vehicle controller signal, and the power sensor is used to detect the remaining power of the lithium battery; The vehicle controller sends a charging completion CAN message when the remaining power reaches 100%; After receiving the charging completion CAN message, the charger controls the first relay to be disconnected, so that the brush block mechanism retracts, and stops the charger from charging the lithium battery.

9. The AGV automatic charging control circuit according to any one of claims 1 to 8, characterized in that: The first relay is a normally closed relay.

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