A multi-channel two-wheeled vehicle charging pile based on an electricity metering chip

Abstract

This invention discloses a multi-channel two-wheeled vehicle charging pile based on a power metering chip in the field of charging technology. The charging pile includes: a main control board, on which an energy metering module is integrated to measure the amount of electricity consumed during charging; the main control board also integrates: a controller, a multi-channel charging switching circuit, and a sampling circuit; the output terminal of the energy metering module is electrically connected to the I / O port of the controller, the controlled terminal of the multi-channel charging switching circuit is electrically connected to the control output terminal of the controller, and the sampling output terminal of the sampling circuit is electrically connected to the input terminal of the energy metering module, the sampling circuit being used to collect the current and voltage signals of the two-wheeled vehicle during charging. By integrating the energy metering module onto the main control board of the charging pile, this invention can calculate the amount of electricity consumed during charging based on current and voltage, facilitating billing for two-wheeled vehicle charging by the number of charges and the amount of electricity consumed.

Description

Technical Field

[0001] This utility model belongs to the field of charging technology, specifically relating to a multi-channel two-wheeled vehicle charging pile based on a power metering chip. Background Technology

[0002] With the acceleration of urbanization and the popularization of green travel concepts, electric bicycles (electric scooters) have become one of the main means of transportation for short-distance travel among Chinese residents due to their convenience, economy, and environmental friendliness. Statistics show that the number of electric scooters in China has exceeded 300 million, with an annual charging demand of tens of billions of times.

[0003] However, many residential communities still do not charge electric bicycles based on the amount of charge per charge. Instead, many community bicycle sheds charge a fixed fee based on time, such as monthly periods. This is unfair to users who use their bikes infrequently, leading many to avoid charging their electric bicycles in the community's public bicycle sheds. Some even remove the batteries and charge them at home, or illegally run extension cords from their homes to charge them in building corridors or downstairs. Whether taken home from the elevator or illegally charged in building corridors or downstairs, the batteries are highly susceptible to fire. Therefore, the current charging methods for electric bicycles make safe management of these vehicles difficult. Utility Model Content

[0004] The purpose of this invention is to provide a multi-channel two-wheeled vehicle charging station based on a power metering chip, in order to solve the problem that the existing charging modes for two-wheeled vehicles are prone to causing difficulties in the safety management of two-wheeled vehicles.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: a multi-channel two-wheeled vehicle charging pile based on a power metering chip, the charging pile comprising: a main control board, wherein the main control board integrates a power metering module, the power metering module being used to measure the power consumed during charging;

[0006] The main control board also integrates a controller, a multi-channel charging switching circuit, and a sampling circuit. The output terminal of the energy metering module is electrically connected to the I / O port of the controller, the controlled terminal of the multi-channel charging switching circuit is electrically connected to the control output terminal of the controller, and the sampling output terminal of the sampling circuit is electrically connected to the input terminal of the energy metering module. The sampling circuit is used to collect the current and voltage signals of the two-wheeled vehicle during the charging process.

[0007] Preferably, the main control board also integrates a power module, which provides operating power to the controller, multi-channel charging switching circuit, power metering module and sampling circuit.

[0008] Preferably, the power module includes: an AC-CDC circuit, a DC-CDC circuit, and a TTL level conversion circuit; the AC-CDC circuit is used to convert the charging power into DC voltage, the DC-CDC circuit is used to convert the DC voltage output by the AC-CDC circuit into voltages of various levels, including: DC+5V, DC+3.3V, and DC+3.8V; the TTL level conversion circuit is used to convert the DC voltage into TTL level.

[0009] Preferably, the multi-channel charging switching circuit is a 10-channel charging switching circuit or a 20-channel charging switching circuit.

[0010] Preferably, when the multi-channel charging switching circuit is a 10-channel charging switching circuit, the controller uses an STM32F103RCT6 chip, and the power metering module uses a single BL0910 metering chip; when the multi-channel charging switching circuit is a 20-channel charging switching circuit, the controller uses a W801 chip, and the power metering module uses two BL0910 metering chips.

[0011] Preferably, each charging switching circuit includes: optocoupler chip U97, resistor R230, resistor R231, transistor Q10, capacitor C1, diode D6, relay K1 and fuse F1;

[0012] The first end of the resistor R230 is the power supply end, and the second end of the resistor R230 is electrically connected to the positive terminal of the input side of the optocoupler chip U97. The negative terminal of the input side of the optocoupler chip U97 is used as the controlled end of the charging switching circuit and electrically connected to the control output end of the controller.

[0013] The first terminal of the output side of the optocoupler chip U97 is electrically connected to the negative terminal of diode D6 and the first terminal of the coil of relay K1, respectively. The second terminal of the coil of relay K1 is electrically connected to the positive terminal of diode D6 and the emitter of transistor Q10, respectively.

[0014] The second terminal of the output side of the optocoupler chip U97 is electrically connected to the first terminal of the resistor R231. The second terminal of the resistor R231 is electrically connected to the base of the transistor Q10 and the first terminal of the capacitor C1, respectively. The collector of the transistor Q10 and the second terminal of the capacitor C1 are both grounded.

[0015] The first end of the switch contact of the relay K1 is electrically connected to the first end of the fuse F1, the second end of the fuse F1 is used to connect to the positive terminal of the charging power supply, and the second end of the switch contact of the relay K1 is used to connect to the positive terminal of the two-wheeled vehicle's charging power supply.

[0016] Preferably, the main control board also integrates a communication module, and the communication port of the communication module is electrically connected to the communication port of the controller.

[0017] Preferably, the main control board also integrates a human-machine interaction module, the port of which is electrically connected to the I / O port of the controller, and the human-machine interaction module includes at least an emergency stop button.

[0018] Preferably, the sampling circuit includes a voltage sampling sub-circuit and a current sampling sub-circuit, wherein the voltage sampling sub-circuit is used to collect the voltage signal of the two-wheeled vehicle during the charging process, and the current sampling sub-circuit is used to collect the current signal of the two-wheeled vehicle during the charging process.

[0019] Preferably, the main control board also integrates a temperature detection module, the output of which is electrically connected to the OI port of the controller for detecting the temperature during the charging process.

[0020] Beneficial effects:

[0021] This invention integrates an energy metering module onto the main control board of the charging pile. During the charging process of the two-wheeled vehicle, a sampling circuit is used to collect current and voltage signals, which are then sent to the energy metering module. The energy metering module can calculate the amount of electricity consumed during charging based on the current and voltage, allowing managers to charge the two-wheeled vehicles on a per-charge basis. This adopts a relatively fair charging method of charging more for more charging and less for less charging, reducing the charging costs for users' two-wheeled vehicles. This encourages users to voluntarily place their two-wheeled vehicles in the charging area, thereby achieving unified management within the community and reducing the occurrence of fire and other fire safety accidents. Attached Figure Description

[0022] The accompanying drawings are provided to further illustrate the embodiments of the present invention and form part of the specification. They are used together with the following detailed description to explain the embodiments of the present invention, but do not constitute a limitation thereof. In the drawings:

[0023] Figure 1 This is a block diagram of a multi-channel two-wheeled vehicle charging pile based on a power metering chip, provided by one embodiment of this utility model.

[0024] Figure 2 This is a schematic diagram of the ML307R_DL chip and its peripheral circuit of a 4G communication module provided in one embodiment of this utility model.

[0025] Figure 3 This is a schematic diagram of the AM21-12W12V chip and its peripheral circuit provided in one embodiment of the present invention.

[0026] Figure 4This is a schematic diagram of a DC-DC circuit provided in one embodiment of the present invention;

[0027] Figure 5 This is a schematic diagram of the STM32F103RCT6 chip and its peripheral circuit provided in one embodiment of this utility model.

[0028] Figure 6 This is a schematic diagram of the BL0910 metering chip and its peripheral circuit provided in one embodiment of this utility model.

[0029] Figure 7 This is a schematic diagram of the W801 chip and its peripheral circuit provided in one embodiment of the present invention.

[0030] Figure 8 This is a schematic diagram of a TTL level conversion circuit provided in one embodiment of the present invention;

[0031] Figure 9 This is a schematic diagram of a charging switching circuit provided in one embodiment of the present invention.

[0032] Figure 10 This is a schematic diagram of a voltage sampling sub-circuit provided in one embodiment of the present invention;

[0033] Figure 11 This is a schematic diagram of a current sampling sub-circuit provided in one embodiment of the present invention. Detailed Implementation

[0034] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the present utility model will be briefly introduced below in conjunction with the accompanying drawings and descriptions of the embodiments or the prior art. Obviously, the following description of the structure of the accompanying drawings is only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. It should be noted that the description of these embodiments is used to help understand this utility model, but does not constitute a limitation on this utility model.

[0035] Figure 1 This is a block diagram of a multi-channel two-wheeled vehicle charging pile based on a power metering chip, provided by one embodiment of this utility model. Figure 1 As shown, this embodiment provides a multi-channel two-wheeled vehicle charging pile based on a power metering chip. The charging pile includes a main control board, which integrates a power metering module, a controller, a multi-channel charging switching circuit, and a sampling circuit.

[0036] The controlled terminal of the multi-channel charging switching circuit is electrically connected to the control output terminal of the controller. The multi-channel charging switching circuit is used to provide charging power for the two-wheeled vehicle. When the two-wheeled vehicle needs to be charged, the controller can control the multi-channel charging switching circuit to connect the two-wheeled vehicle to the charging power and start charging. After charging is completed, the controller controls the multi-channel charging switching circuit to disconnect the two-wheeled vehicle from the charging power and end charging. The charging power is 220V AC power.

[0037] The controlled terminal of the multi-channel charging switching circuit is electrically connected to the control output terminal of the controller, and the sampling output terminal of the sampling circuit is electrically connected to the input terminal of the energy metering module. The sampling circuit is used to collect the current and voltage signals of the two-wheeled vehicle during the charging process. The sampling circuit then transmits the collected current and voltage signals to the energy metering module, which can measure the amount of electricity consumed during charging based on the current and voltage signals.

[0038] Therefore, this embodiment integrates the energy metering module onto the main control board of the charging pile. During the charging process of the two-wheeled vehicle, a sampling circuit is used to collect current and voltage signals. The collected current and voltage signals are sent to the energy metering module, which can calculate the amount of electricity consumed during charging based on the current and voltage. This allows managers to charge the two-wheeled vehicles on a per-charge and per-use basis, adopting a relatively fair charging method of charging more for more charging and less for less charging. This reduces the charging costs for users' two-wheeled vehicles, encouraging users to actively place their two-wheeled vehicles in the charging area. This achieves unified management within the community and reduces the occurrence of fire and other fire safety accidents.

[0039] As a further optimization of this embodiment, the main control board also integrates a power module, a communication module, and a human-computer interaction module.

[0040] The power module provides operating power to the controller, multi-channel charging switching circuit, energy metering module, and sampling circuit.

[0041] The communication port of the communication module is electrically connected to the communication port of the controller. In this embodiment, the communication module preferably adopts a 4G communication module, which uses the ML307R_DL chip. The ML307R_DL chip and its peripheral circuits of the 4G communication module are as follows: Figure 2 As shown, the specific circuit structure of the 4G communication module is not described in detail in this embodiment. In this embodiment, the communication module can establish a communication connection with a remote terminal (such as a PC). The communication module can upload data such as the charging power, charging time, and charging user information of the two-wheeled vehicle to the remote terminal. The remote terminal can visualize this data. At the same time, the remote terminal can also remotely control the vehicle through the communication module and issue remote control commands (such as a command to stop charging).

[0042] In this embodiment, to enable automatic charging, an RFID card reader is integrated on the main control board. Each user is equipped with an identification card (RFID card) containing the user's charging information. When the user connects the two-wheeled vehicle's charger to the charging pile in this embodiment, the charging pile can be automatically activated by swiping the card. For example, the RFID card reader reads the charging user information in the identification card and uploads the read charging user information to a remote terminal. The remote terminal also contains the charging user information. The two are compared and verified. If the verification is successful, a charging start command is generated. The remote terminal activates the controller to control the charging switching circuit to connect the two-wheeled vehicle to the charging power supply and start charging. The automatic charging process can also be achieved using the currently available QR code charging. The implementation principle of QR code charging is a conventional technology in this field, so the specific implementation process of QR code charging is not described in detail in this embodiment.

[0043] The human-computer interaction module is electrically connected to the I / O port of the controller. The human-computer interaction module includes an emergency stop button, which in this embodiment is used to forcibly cut off the system power supply in abnormal conditions.

[0044] As a further optimization of this embodiment, the power supply module includes: an ACDC circuit, a DC-DC circuit, and a TTL level conversion circuit; the ACDC circuit is used to convert the charging power into DC voltage, the DC-DC circuit is used to convert the DC voltage output by the ACDC circuit into voltages of various levels, including: DC+5V, DC+3.3V, and DC+3.8V; the TTL level conversion circuit is used to convert the DC voltage into TTL level.

[0045] The AC / CDC circuit includes the AM21-12W12V chip and its peripheral circuitry, such as... Figure 3 As shown, the AM21-12W12V chip is used to convert the input AC220V alternating current into DC+12V direct current.

[0046] The DC-DC circuit includes the SCT2450STER power supply chip, the AMS1117-3.3 power supply chip, and the MT2492 power supply chip, among others. The peripheral circuits for these power supply chips include... Figure 4As shown, the SCT2450STER power chip is used to convert DC+12V to DC+5V, and DC+5V is used to power the controller. The AMS1117-3.3 power chip is used to convert DC+5V to DC+3.3V, and DC+3.3V is used to power the communication module and the power metering module. The MT2492 power chip is used to convert DC+5V to DC+3.8V, and DC+3.8V is used to power the power metering module. The power metering module requires two voltage levels: DC+3.8V and DC+3.3V.

[0047] The TTL level conversion circuit is used to connect the communication module and the controller. The TTL level conversion circuit, such as... Figure 8 As shown, the USART1 (USART1_RX and USART1_TX) of the TTL level conversion circuit is connected to the USART1 port of the controller (specifically, the controller's GPIO_PA_10 and GPIO_PA_9). The resistor R53 and the emitter of the transistor Q7 of the TTL level conversion circuit are connected to the UART0_RX and UART0_TX of the communication module, respectively, to enable communication between the controller and the module via the serial port. In addition, GPIO_PA_8 controls the restart of the 4G module.

[0048] As a further optimization of this embodiment, the multi-channel charging switching circuit is a 10-channel charging switching circuit or a 20-channel charging switching circuit. Each charging switching circuit can be connected to the charger of a two-wheeled vehicle. Therefore, a charging pile can provide charging services for 10 or 20 two-wheeled vehicles at the same time.

[0049] In this embodiment, when the multi-channel charging switching circuit has 10 channels, the controller uses an STM32F103RCT6 chip, and the energy metering module uses a single BL0910 metering chip; when the multi-channel charging switching circuit has 20 channels, the controller uses a W801 chip, which has a built-in FPU suitable for handling floating-point numbers, and the energy metering module uses two BL0910 metering chips. The STM32F103RCT6 chip and its peripheral circuitry are as follows... Figure 5 As shown, the BL0910 metering chip and its peripheral circuitry are as follows: Figure 6 As shown, the W801 chip and its peripheral circuits are as follows: Figure 7 As shown.

[0050] In this embodiment, only one of the 10 channels has a 3.3V supply provided by an AMS1117-3.3 device, while 4 of the 20 channels have a supply provided by three XC6206P332MR chips and one AMS1117-3.3 device. The MCU uses one channel independently, the two BL0910 chips each use one channel independently, and the relay uses one channel independently.

[0051] As a further optimization of this embodiment, such as Figure 9 As shown, Figure 9 The diagram only shows one charging switching circuit. For 10-channel and 20-channel charging switching circuits, there are a total of 10 and 20 channels respectively. Figure 9 The circuit is identical to that in the previous circuit. Therefore, each charging switching circuit includes: optocoupler chip U97, resistor R230, resistor R231, transistor Q10, capacitor C1, diode D6, relay K1 and fuse F1; among which, optocoupler chip U97 adopts EL357N chip.

[0052] The first end of the resistor R230 is the power supply end, and the second end of the resistor R230 is electrically connected to the positive terminal of the input side of the optocoupler chip U97. The negative terminal of the input side of the optocoupler chip U97 is used as the controlled end of the charging switching circuit and electrically connected to the control output end of the controller.

[0053] The first terminal of the output side of the optocoupler chip U97 is electrically connected to the negative terminal of diode D6 and the first terminal of the coil of relay K1, respectively. The second terminal of the coil of relay K1 is electrically connected to the positive terminal of diode D6 and the emitter of transistor Q10, respectively.

[0054] The second terminal of the output side of the optocoupler chip U97 is electrically connected to the first terminal of the resistor R231. The second terminal of the resistor R231 is electrically connected to the base of the transistor Q10 and the first terminal of the capacitor C1, respectively. The collector of the transistor Q10 and the second terminal of the capacitor C1 are both grounded.

[0055] The first end of the switch contact of the relay K1 is electrically connected to the first end of the fuse F1, the second end of the fuse F1 is used to connect to the positive terminal of the charging power supply, and the second end of the switch contact of the relay K1 is used to connect to the positive terminal of the two-wheeled vehicle's charging power supply.

[0056] In this embodiment, the controller outputs high and low levels to control the output of the EL357N optocoupler, which in turn controls the transistor Q10, thereby indirectly controlling the 12V output from the 3.3V output. The relay T1 controls the conduction of this AC power.

[0057] As a further optimization of this embodiment, the sampling circuit includes: a voltage sampling sub-circuit and a current sampling sub-circuit. The voltage sampling sub-circuit is used to collect the voltage signal of the two-wheeled vehicle during the charging process, and the current sampling sub-circuit is used to collect the current signal of the two-wheeled vehicle during the charging process. The voltage sampling sub-circuit is as follows: Figure 10 As shown, the current sampling sub-circuit is as follows: Figure 11 As shown.

[0058] In this embodiment, the voltage sampling sub-circuit uses five 300K resistors and a 1K resistor to divide the voltage, and VP is connected to the VP pin of the BL0910 metering chip; the current sampling sub-circuit determines the magnitude of the current in the circuit by collecting the voltage across the two segments of the 0.001R alloy sampling resistor.

[0059] As a further optimization of this embodiment, the main control board also integrates a temperature detection module. The output of the temperature detection module is electrically connected to the OI port of the controller and is used to detect the temperature during the charging process. Therefore, the controller can set an upper temperature limit and force power off when the temperature reaches the set value.

[0060] Finally, it should be noted that the above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of protection of this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the scope of protection of this utility model.

Claims

1. A multi-channel two-wheeled vehicle charging pile based on a power metering chip, characterized in that, The charging pile includes a main control board, on which an energy metering module is integrated, which is used to measure the amount of electricity consumed during charging. The main control board also integrates: a controller, a multi-channel charging switching circuit, and a sampling circuit; the output terminal of the energy metering module is electrically connected to the IO port of the controller, the controlled terminal of the multi-channel charging switching circuit is electrically connected to the control output terminal of the controller, and the sampling output terminal of the sampling circuit is electrically connected to the input terminal of the energy metering module. The sampling circuit is used to collect the current signal and voltage signal of the two-wheeled vehicle during the charging process. The multi-channel charging switching circuit is a 10-channel charging switching circuit or a 20-channel charging switching circuit.

2. The power metering chip-based multi-lane two-wheeler charging station according to claim 1, characterized in that, The main control board also integrates a power module, which provides operating power to the controller, multi-channel charging switching circuit, power metering module and sampling circuit.

3. The power metering chip based multi-way two-wheeler charging station as claimed in claim 2, wherein, The power module includes: an ACDC circuit, a DC-DC circuit, and a TTL level conversion circuit; the ACDC circuit is used to convert the charging power into DC voltage, the DC-DC circuit is used to convert the DC voltage output by the ACDC circuit into voltages of various levels, including: DC+5V, DC+3.3V, and DC+3.8V; the TTL level conversion circuit is used to convert the DC voltage into TTL level.

4. The power metering chip-based multi-lane two-wheeler charging station of claim 1, wherein, When the multi-channel charging switching circuit is a 10-channel charging switching circuit, the controller uses an STM32F103RCT6 chip, and the power metering module uses a single BL0910 metering chip; when the multi-channel charging switching circuit is a 20-channel charging switching circuit, the controller uses a W801 chip, and the power metering module uses two BL0910 metering chips.

5. The power metering chip-based multi-path two-wheeler charging station according to claim 1 or 4, characterized in that, Each charging switching circuit includes: optocoupler chip U97, resistor R230, resistor R231, transistor Q10, capacitor C1, diode D6, relay K1 and fuse F1; The first end of the resistor R230 is the power supply end, and the second end of the resistor R230 is electrically connected to the positive terminal of the input side of the optocoupler chip U97. The negative terminal of the input side of the optocoupler chip U97 is used as the controlled end of the charging switching circuit and electrically connected to the control output end of the controller. The first terminal of the output side of the optocoupler chip U97 is electrically connected to the negative terminal of diode D6 and the first terminal of the coil of relay K1, respectively. The second terminal of the coil of relay K1 is electrically connected to the positive terminal of diode D6 and the emitter of transistor Q10, respectively. The second terminal of the output side of the optocoupler chip U97 is electrically connected to the first terminal of the resistor R231. The second terminal of the resistor R231 is electrically connected to the base of the transistor Q10 and the first terminal of the capacitor C1, respectively. The collector of the transistor Q10 and the second terminal of the capacitor C1 are both grounded. The first end of the switch contact of the relay K1 is electrically connected to the first end of the fuse F1, the second end of the fuse F1 is used to connect to the positive terminal of the charging power supply, and the second end of the switch contact of the relay K1 is used to connect to the positive terminal of the two-wheeled vehicle's charging power supply.

6. The power metering chip based multi-way two-wheeler charging station according to claim 1, wherein, The main control board also integrates a communication module, and the communication port of the communication module is electrically connected to the communication port of the controller.

7. The power metering chip based multi-way two-wheeler charging station according to claim 1, wherein, The main control board also integrates a human-machine interaction module. The port of the human-machine interaction module is electrically connected to the I / O port of the controller. The human-machine interaction module includes at least an emergency stop button.

8. The power metering chip based multi-way two-wheeler charging station according to claim 1, wherein, The sampling circuit includes a voltage sampling sub-circuit and a current sampling sub-circuit. The voltage sampling sub-circuit is used to collect the voltage signal of the two-wheeled vehicle during the charging process, and the current sampling sub-circuit is used to collect the current signal of the two-wheeled vehicle during the charging process.

9. The multi-channel two-wheeled vehicle charging pile based on a power metering chip according to claim 1, characterized in that, The main control board also integrates a temperature detection module, the output of which is electrically connected to the OI port of the controller to detect the temperature during the charging process.

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