CN109733225B - Suspension type charging device for underground parking lot - Google Patents

Abstract

The invention relates to the technical field of charging of new energy vehicles, in particular to a suspension type charging device for an underground parking lot. The device includes three parts: electric pile electrical part, electric pile control part, charging gun wire part, control circuit power supply and motor rotation to extend and retract the charging gun to the designated position, using the embedded controller of the Android system, the controller integrates Bluetooth The module matches the vehicle. In order to verify the legitimacy of the vehicle and measure the distance between the vehicle and the electric pile, install the ibeacon device in the vehicle. The Proximity UUID and TX power can be captured in the ibeacon signal. The Proximity UUID is the only device that can be determined. Identifier, TX power is the signal strength value, which is used to determine how close the vehicle is to the beacon. According to this value, not only rough information can be obtained, but also the distance accurate to meters can be obtained. It is a lightweight suspended charging pile, which allows the charging pile to be installed on the ceiling of the underground garage and charges the electric vehicle through an automatic telescopic arm.

Description

Suspended charging device for underground parking lot

Technical field:

The invention relates to the technical field of charging of new energy vehicles, in particular to a suspended charging device for underground parking lots.

Background technique

New energy vehicles solve the problem of energy shortage, reduce urban air pollution and do not repeat the mistakes of traditional automobile technology. But now ordinary individuals have problems that cannot be solved by themselves when using new energy vehicles to charge.

Electric vehicles have their own technical constraints due to their structure:

a) The vehicle battery takes a long time to charge. The AC charging time of an electric vehicle is generally 5-8 hours, which requires the vehicle to occupy the parking space for a long time to connect to the charging pile. There is a big gap compared with the fast refueling method of fuel vehicles.

b) The battery usage time will vary greatly with the change of ambient temperature. At present, most of the batteries of electric vehicles are ternary lithium batteries. Its biggest disadvantage is that its energy density is low (110WH/Kg), and its capacity decays greatly at low temperature (the capacity at -10°C is about 55% of that at 25°C). Therefore, the outdoor charging in the northern winter will not reach 100% full, which will seriously affect the battery life of the vehicle.

c) The construction cost of electric piles is high, and the problem of land occupation is serious. Since electric vehicles take a long time to charge to be fully charged, they need to be charged when the vehicle is parked. It is necessary to install electric pile equipment on the parking space of the vehicle, and need to connect the power supply and network cable. Most of the electric piles provided by the manufacturers are column type. For individual car owners, installing a private electric pile in any public parking lot will occupy the public ground space, which is often not allowed. Electric vehicles are more suitable for charging indoors or in an environment with a relatively suitable underground temperature, while most underground parking lots have a relatively tight floor area. Setting up charging piles on the ground will not only occupy land, but also need to dig trenches and bury electric wires and network cables, which increases the realization of electric vehicles. difficulty and construction cost. At the same time, it also brings the hidden danger of collision and damage to other vehicles.

Invention content:

Aiming at the charging problem of electric vehicles, the purpose of this invention is to provide a suspension charging device for underground parking lots.

1. The technical scheme of the present invention is as follows: a suspended charging device for an underground parking lot, the device includes three parts: an electric pile electric part, an electric pile control part, and a charging gun wire part, and the electric pile electric part is used to carry out electricity. Converted to the input current and voltage of standard electric vehicles, consisting of switching power supply, relay, meter, circuit breaker, control circuit power supply and motor rotation to extend and retract the charging gun to the designated position, using the embedded controller of the Android system, integrated in the controller The Bluetooth module is matched with the vehicle. In order to verify the legitimacy of the vehicle and measure the distance between the vehicle and the electric pile, install the ibeacon device in the vehicle. By capturing the Proximity UUID and TX power in the ibeacon signal, the Proximity UUID can determine the device. Unique identifier, TX power is the signal strength value, which is used to determine the distance between the vehicle and the beacon. According to this value, not only rough information can be obtained, but also the distance accurate to meters can be obtained.

It is characterized in that: a small synchronous gear transmission shaft 5 is set in the charging gun wire part to connect to the motor, transmit power to the small synchronous gear 10, and transmit the power to the large synchronous gear 11 through the synchronous toothed belt 9, and the large synchronous gear 11 passes the transmission pin. 13. Transfer the power to the hub 3, drive the hub to rotate, and connect the power plug of the charging gun connection wire to the rotatable power plug through the lower wire hole 14 in Figure 5. The connecting wire of the charging gun enters the hub through the outer edge of the wide mouth of the hub. The size of the bottom of the hub is the diameter of the single wire of the connecting wire, so as to ensure that only one circle of the charging cable of the charging gun surrounds the hub for each turn of the hub. Ensure that the rising and falling height of the charging cable can be accurately controlled by the rotation of the motor; the transmission shaft transmits the power to the transmission gear 12, and the transmission gear 12 meshes with the transmission gear 18 on the double transmission gear 4. The number of teeth of the synchronous large gear is 11, the number of teeth of the synchronous pinion is 10, and the number of teeth of the transmission gear is 12. The design does not completely transmit the number of teeth of the large gear. After controlling the storage of the charging cable, start the rack transmission device.

Environmental requirements: The charging current is generally about 16-32A, and the current can be DC or two-phase alternating current and three-phase alternating current, so the charging time is 5 to 8 hours depending on the capacity of the battery pack.

Example of ranging function in the present invention:

protected static double calculateAccuracy(int txPower, double rssi)

{ if (rssi == 0) { return -1.0;

}

double ratio = rssi * 1.0 / txPower;

if (ratio < 1.0) {

return Math.pow(ratio, 10);

} else {

double accuracy = (0.89976) * Math.pow(ratio, 7.7095) +0.111;

return accuracy;

}

}

gun wire part installation

This device is a charging gun storage device. This device is installed on the wall above the vehicle to be charged. Its function is to retract the charging gun, store the charging gun and connect the wires, and keep the charging gun clean and tidy storage environment. The entire charging device can meet the charging gun retraction operation, the charging gun connecting line can be kept neat during the charging process and after being retracted, and the charging gun can be kept in a dust-free and tidy environment when the charging gun stops charging.

The advantages of the present invention are as follows: It is a light and suspended charging pile, and the charging pile is installed on the ceiling of the underground garage, and the electric vehicle is charged by the automatic telescopic arm. Environmental requirements: The charging current is generally about 16-32A, and the current can be DC or two-phase alternating current and three-phase alternating current, so the charging time is 5 to 8 hours depending on the capacity of the battery pack. The device captures the vehicle's entry action through bluetooth technology, and verifies the legal vehicle through ibeacon. When the vehicle is in the warehouse, the hanging charging gun will automatically capture the distance of the vehicle, automatically release the charging gun from the storage device, drop the charging gun from the sky, and extend it to a reasonable position. The user can easily insert it into the charging port of the vehicle to charge it when the vehicle When leaving, the charging gun is automatically retracted into the charging gun storage device. That saves space and ensures the safety and stability of the charging gun head.

Description of drawings

The present invention will be further described below in conjunction with the accompanying drawings and implementation examples.

FIG. 1 is a schematic diagram of the assembly structure of the present invention.

FIG. 2 is a schematic diagram of the connection of the synchronous continuous belt in the present invention.

3 is a schematic diagram of the connection of the synchronous toothed belt in the present invention.

Figure 4 Schematic diagram of the meshing state of incomplete transmission gears in double transmission gears

FIG. 5 is a schematic diagram of a hub in the present invention. .

Figure 6 is a schematic diagram of an incomplete transmission gear.

Fig. 7 is a schematic diagram of opening the flip cover when the incomplete transmission gear does not transmit power.

Figure 8 is a schematic diagram of a transmission rack.

FIG. 9 is a schematic diagram of the state of incomplete transmission gear transmission.

Figure 10 is a schematic diagram of the flip cover closed.

Figure 11 is a schematic diagram of the matching of the charging socket.

Figure 12 is a schematic diagram of the rotating charging base.

FIG. 13 is a schematic diagram of the storage state of the charging cable.

FIG. 14 is a schematic diagram of a state where the charging cable is released.

Figure 15 is a detailed view of the connection of the charging cable inside the hub.

Figure 16 is a schematic diagram of the motor control.

Fig. 17 is a block diagram of a control sequence.

In the picture: 1. Installation box, 2. Flip cover, 3. Hub plate, 4. Double transmission gear, 5. Small synchronous gear transmission shaft, 6. Transmission rack, 7. Transmission connecting rod 1,8 . Transmission link 2, 9 synchronous toothed belt, 10. Small synchronous gear, 11. Large synchronous gear, 12. Transmission gear, 13. Transmission pin, 14. Lower wire hole, 15. Transmission pin hole, 16. Rotary power source Interface, 17. Winding core roller, 18. Transmission gear, . Incomplete transmission gear 19,, 20. Rack, 21 Push pin, 22. Fixed charging socket, 23. Rotating charging socket, 24. Rotating charging base cathode , 25. Rotate the anode of the charging base, 26. The plug for the connecting wire of the charging gun, 27. The charging cable, 28. The charging gun, 29. The charging cable plug, 31. The forward stop travel switch, 32. The reverse rotation stop travel switch.

Detailed ways

1. Charging gun ascending and descending distance control

In Figures 3 and 4, the small synchronous gear transmission shaft (5) is connected to the motor, and transmits the power to the small synchronous gear (10), and transmits the power to the large synchronous gear (11) via the synchronous toothed belt (9). The synchronizing gear (11) transmits the power to the hub (3) through the transmission pin (13), which drives the hub to rotate, and the power plug of the connecting wire of the charging gun is connected to the rotatable power plug through the lower wire hole (14) in Figure 5 superior. The connecting wire of the charging gun enters the hub through the outer edge of the wide mouth of the hub. The size of the bottom of the hub is the diameter of the single wire of the connecting wire, so as to ensure that only one circle of the charging cable of the charging gun surrounds the hub for each turn of the hub. Ensure that the rising and falling height of the charging cable can be precisely controlled by the rotation of the motor.

2. Clamshell opening and closing control

In Fig. 1, the small synchronous gear transmission shaft 5 is connected to the motor. In Fig. 4, the transmission shaft transmits the power to the transmission gear 12. The transmission gear 12 meshes with the transmission large gear 18 on the double transmission gear 4, and the length of the wire is connected through the charging wire gun. , The number of teeth of the synchronous large gear is 11, the number of teeth of the synchronous pinion is 10, the number of teeth of the transmission gear is 12, and the number of teeth of the incomplete transmission large gear on the design incomplete double transmission gear 4 is 19. After controlling the storage of the charging cable, start the rack transmission device.

Example: The designed charging cable length is 2.2 meters, the outer diameter of the winding core roller 17 is 86mm, and the average diameter of the charging gun connecting wire is 10mm, (146+136+126+116+106+96)*3.14=2279.64mm, about 2.2 meters , the hub plate (3) needs to rotate 6 times, the number of teeth of the small synchronization gear is designed to be 16, the number of teeth of the large synchronization gear is 11, and the number of teeth of the large synchronization gear is 32. , the number of teeth of the transmission gear 18 is designed to be 144, the transmission gear 12 rotates 12 times, the transmission gear 18 rotates for 1 week, and drives the incomplete transmission gear 19 to rotate once, and the circular angle opposite to the number of teeth of the incomplete transmission gear 19 is 65°, 65* 360/2.2=0.4 meters. 0.3m is the length of the flip cover 2) When the connecting wire of the charging gun starts to collect and rotate, the incomplete transmission gear 19 has no teeth and is above the rack (6), there is no power transmission, and the rack is in a static state, such as As shown in Figures 9 and 10; when the connecting wire of the charging gun is rotated and wound for 0.4 meters, the position of the charging gun is on the flip cover 2, and the incomplete transmission gear 19 rotates above the rack 6 without teeth, and meshes with the rack 6 , the power is transmitted to the rack 6, the rack 6 drives the flip cover 2 to open by pushing the pin 21, the hub 3 continues to rotate, the charging gun continues to move up, the rack 6 pushes the flip cover to rotate, and the flip cover 2 After closing, the incomplete transmission gear 19 is positioned above the rack 6 where there is no tooth, and the flip cover 2 is no longer rotated. The process of opening the flip cover 2 is the opposite of the above process. The charging gun is no longer constrained by the connecting wire due to the release of the connecting wire, and the charging gun sags to the vicinity of the charging car due to gravity.

3. Charging gun cable rotating charging socket

The charging socket of the charging gun connecting wire is designed as a rotatable charging socket to prevent the charging gun connecting wire from being twisted and broken due to rotation.

Figure 14 shows the fixed charging socket 22 fixed on the installation box 1, the rotary charging socket 23 is connected to the rotary power supply port 16 on the hub 3, the charging port of the charging gun connecting line is connected to the rotary charging socket 23, when the charging gun connecting line is connected to the rotary charging socket 23 When the hub 3 is driven to rotate, the rotating charging socket 23 rotates along with the connecting wire of the charging gun to prevent the charging cable from being twisted due to the rotation of the hub 3 .

Motor selection calculation:

Choose 32A and 16A for the charging pile charging cable, and the corresponding weight can be found according to the "Wire Weight Table", as shown in Table 1-1 below.

Table 1-1 Weight specification of charging cable

model Specifications: number of cores╳section mm² Theoretical weight: kg/km Theoretical outer diameter: mm 16A 3╳2.5+2╳0.75 377 14.6 32A 3╳6+2╳0.75 631 17.9

According to the data shown in the table, if the length of the charging cable is about 3.5m, the weight of the charging cable is about 1.3kg-2.2kg, the charging gun is about 2.0kg, the total weight is 3.3kg-4.2kg, and the winding speed of the charging cable is about 0.7m/S, the calculated required power is 23.1w-29.4w, considering factors such as friction consumption, the motor is selected as 120w. Select motor parameters as shown in Table 1-2 below.

Table 1-2 Parameter table of winding motor

manufacturer's name Changzhou Songgang Motor Co., Ltd. Working power 120w Motor name Capacitor running asynchronous motor Power mode alternating current brand VZR model 5IK120RGN-CF Power phase number Simplex Type of power supply AC motor Governor function Adjustable speed, controllable steering model 5GN20K

QS is the main switch, KM1 is the relay coil that controls the forward rotation, KM2 is the relay coil that controls the reverse rotation, SB1 is the normally closed switch that controls the stop button, SB1 is the forward rotation control button, SB3 is the reverse control button, and SQ1 is the forward stop travel switch. SQ2 is the travel stop switch for reverse transmission.

The motor control principle is as follows: the main switch QS is closed, the circuit is electrified, when SB1 is closed (the button is not pressed), press the forward rotation control button SB2, KM1 is turned on and remains on, the SB2 button pops up, and the motor continues to be powered Keep the forward rotation, the gear drives the rack to move, until the rack presses the travel switch SQ1 to disconnect the circuit, and the motor stops running when power is lost. Press the reverse control button SB3, KM2 is turned on and remains on, the SB3 button pops up, the motor continues to receive electricity and keeps reversing, and the gear drives the rack to move until the rack presses the travel switch SQ2 to disconnect the circuit, and the motor fails. Electricity stopped. During operation, press the SB1 stop switch, the motor will stop when power is lost.

Claims (1)

1. A suspended charging device for an underground parking lot, the device comprising three parts: the electric energy meter comprises an electric pile electric part, an electric pile control part and a charging gun line part, wherein the electric pile electric part is used for converting electricity into input current and voltage of a standard electric automobile and comprises a switching power supply, a relay, an electric meter and a circuit breaker, a control circuit supplies power and a motor rotates to stretch a charging gun to a specified position, an embedded controller of an Android system is adopted, a Bluetooth module is integrated in the controller to be matched with the automobile, in order to verify the legality of the automobile and measure the distance between the automobile and the electric pile, equipment of a Proximity is installed in the automobile, by capturing Proxiy UUID and TX power in a signal of the Proximity UUID, the Proxiy UUID is a unique identifier capable of determining the equipment, and TX power is a signal strength value used for determining how close the distance between the automobile and the beacon, and the electric energy meter is characterized in that: a small synchronous gear transmission shaft (5) is arranged in a charging gun line part and connected with a motor, power is transmitted to a small synchronous gear (10), the power is transmitted to a large synchronous gear (11) through a synchronous toothed belt (9), the large synchronous gear (11) transmits the power to a wire collecting disc (3) through a transmission pin (13), the wire collecting disc is driven to rotate, the extension and retraction of a suspended charging gun are realized, and a charging line power plug connected with the charging gun is connected to a rotatable power plug through a lower line hole (14) in the wire collecting disc (3); charging wires connected with the charging guns enter the wire collecting disc (3) through the outer edge of a wide opening of the wire collecting disc (3), the bottom size of the wire collecting disc is the diameter size of a single wire of the charging wires, and only one circle of charging gun charging wires is ensured to surround on each circle of the wire collecting disc when the wire collecting disc rotates, so that the rising and falling heights of the charging wires can be accurately controlled through the rotation of the motor; the duplex transmission gear (4) comprises a transmission big gear (18) and an incomplete transmission gear (19) which are coaxially arranged, the transmission shaft (5) transmits power to the transmission gear (12), the transmission gear (12) and the small synchronous gear (10) are coaxially arranged, the transmission gear (12) is meshed with the transmission big gear (18), the incomplete transmission gear (19) is meshed with the transmission rack (6), the transmission rack (6) is rotationally connected with the turnover cover plate (2) through a pushing pin (21), the number of teeth of an incomplete transmission gear (19) of a duplex transmission gear (4) is designed through the length of a connecting wire of a charging wire gun, the number of teeth of a synchronous big gear (11), the number of teeth of a synchronous small gear (10) and the number of teeth of a transmission gear (12), after the charging wire is controlled to be stored, the starting rack transmission device closes or opens the turnover cover plate (2), and the storage and the release of the charging gun are realized.

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