A wireless network-based intelligent orderly charging controller

Abstract

The application discloses a kind of intelligent orderly charging controller based on wireless network, it is related to orderly charging control technical field;Through the wireless communication module being set, the electric vehicle slow charging control equipment of orderly charging control can be realized by wireless mode;Remote control charging current can also be simultaneously carried out, and the charging current of electric vehicle in the orderly charging controller of control area is accessed according to power grid overall planning;Through the switch or control panel of outside, it can be switched to adapt to different specifications of charging pile;According to the difference between actual charging current and target current, dynamic adjustment is carried out, to ensure the accuracy of control;Through the switch being set, the control of charging start and end is carried out, to avoid live operation and also come security risk;Also with the help of temperature and humidity sensor built-in peripheral circuit, charging environment state can be monitored, to ensure charging safety, the application is simple and effective, and easy to practice.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of orderly charging control, and specifically relates to an intelligent orderly charging controller based on a wireless network. BACKGROUND

[0002] The state vigorously promotes the development of new energy vehicles, and the share of new energy vehicles is increasingly high. The demand for vehicle charging is also rapidly increasing, and public charging piles are already difficult to meet the growing demand for charging. More and more new energy vehicle owners hope to install charging piles in private parking spaces in communities. However, due to the current limitation of power grid load, it is impossible to meet the demand for simultaneous charging of a large number of electric vehicles, resulting in difficulties for vehicle owners to install charging piles in communities. Orderly charging is an effective means to solve this contradiction. The application designs and develops an intelligent orderly charging controller based on a wireless network, which can access the power grid system, cooperate with the actual load of the power grid system, and use efficient and reasonable charging regulation methods to balance the power load distribution between the demand for electric vehicle charging load and the demand for normal resident production and life load, improve the management level of the charging system, and improve the service quality of the charging system.

[0003] Existing solutions are mostly based on charging piles to adjust orderly charging current. If unified orderly charging control is to be performed through the power grid, special charging piles must be customized, and wired communication control is required. The existing or currently researched orderly charging control methods mainly include the following aspects:

[0004] (1) Charging pile control scheme: specified charging piles must be uniformly installed, and construction costs are required. If the charging pile costs are paid by the vehicle owners, the choice of the vehicle owners is limited, which causes complaints from the vehicle owners. The orderly charging cannot be implemented for the charging piles that have been installed.

[0005] (2) Charging pile power supply on-off: the power supply of the charging pile is directly cut off, resulting in complete stop of the charging process. For the charging piles that need to be charged on the market, the card needs to be re-swiped after power-off and power-on to continue charging. This scheme causes the charging process to be unable to resume after orderly charging control is performed. This scheme is suitable for charging piles that do not need to be identified by swiping cards, but such charging piles have the risk of being stolen in public areas.

[0006] (3) Energy storage station: this scheme needs to establish an energy storage station, which can fully utilize the orderly charging control of the peak and valley of the power grid, but the cost is too high and the land occupation is large.

[0007] (4) Charging pile power supply current limiting: in the case where the load does not change, the output power regulation technology is difficult to implement, and the prices of currently available products with similar functions are all more than 10W. The cost of a few reliable products can reach hundreds of thousands of yuan.

[0008] To provide a better solution, a technical solution is proposed. SUMMARY

[0009] The present application aims to at least solve one of the technical problems existing in the prior art; for this purpose, the present application proposes an intelligent orderly charging controller based on a wireless network.

[0010] An intelligent orderly charging controller based on a wireless network, characterized by comprising:

[0011] An adapter is arranged between the charging gun and the slow charging port of the vehicle, and a control chip is arranged in the adapter, the control chip comprising a power module, a control module, a wireless communication module and a peripheral circuit;

[0012] The power module is used to power the entire control chip, provide 3.3V power supply for the wireless communication module, provide 5V power supply for the control module, and output ±12V voltage to provide PWM square wave level output to the vehicle-mounted charger;

[0013] The wireless communication module uses a wireless communication mode for communication, and the wireless communication mode includes Lora, Zigbee, 4G and Bluetooth;

[0014] The control module selects the minimum current suitable for charging current according to the alternative condition; the control module controls the output PWM wave duty cycle to give a signal that the external charging condition of the electric vehicle does not meet the full power charging, so as to adjust the charging current by using the set PWM wave duty cycle;

[0015] The peripheral circuit includes current sensor signal conversion and temperature and humidity sensor signal acquisition circuit.

[0016] Further, the wireless communication module uses AES encryption and sets a network password to ensure the safety of signal transmission, and nodes without the password cannot join the network.

[0017] Further, the wireless communication module adopts a master-slave node structure, and the wireless module in the orderly charging controller belongs to the slave node in the system, and a master node is arranged in a certain area to receive the data of the orderly charging controller and send the charging control current to the orderly charging controller.

[0018] Further, the alternative condition is specifically: the charging current of the electric vehicle is determined by the frequency of the PWM square wave duty cycle output by the charging pile, which is 1K, the high level is 12V, the low level is-12V, the resistance of the charging cable and the charging demand of the battery pack in the vehicle, and the minimum current is marked as the charging current.

[0019] Further, the control module switches through an internal loop, simulates the state of the vehicle accessing the charging gun, and provides a signal of a closed power supply loop to the charging pile through a camouflage loop in the orderly charging controller to perform normal charging.

[0020] Further, the control module is further used for dynamically adjusting according to the deviation of the actual charging current from the required current value, and the dynamic adjustment is specifically as follows:

[0021] sending the target current by the energy controller;

[0022] then outputting the corresponding duty cycle square wave by the control module;

[0023] detecting the actual output current by the current sensor, judging the difference between the output current and the target current, and adjusting the corresponding duty cycle square wave output by the control module according to the difference until the output current is consistent with the target current.

[0024] Compared with the prior art, the present application has the following advantages:

[0025] The wireless communication module can realize the slow charging control equipment of the electric vehicle through the wireless orderly charging control, and can also remotely control the charging current, control the charging current of the electric vehicle accessing the orderly charging controller in the unified control area of the power grid, and switch the charging pile of different specifications through the external switch or control panel.

[0026] The dynamic adjustment according to the difference between the actual charging current and the target current ensures the accuracy of the control, the switch is used to control the start and end of the charging to avoid the safety hazard of live operation, and the temperature and humidity sensor in the peripheral circuit can monitor the charging environment to ensure the safety of the charging. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 The figure is a structural schematic diagram of the orderly charging controller of the present application.

[0028] Figure 2 The figure is a control module adjustment PWM duty cycle circuit diagram of the present application.

[0029] Figure 3 The figure is a camouflage loop circuit diagram of the present application. DETAILED DESCRIPTION

[0030] The technical solutions of the present application will be described in detail below with reference to the embodiments. Obviously, the described embodiments are only part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] As Figure 1 shown, the application provides a wireless network-based intelligent orderly charging controller, comprising:

[0032] An adapter is arranged between the charging gun and the slow charging port of the vehicle, and the adapter is provided with a control chip, which comprises a power module, a control module, a wireless communication module and a peripheral circuit;

[0033] The power module is used to power the entire control chip, provide 3.3V power supply for the wireless communication module, provide 5V power supply for the control module, and output ±12V voltage to provide PWM square wave level for the vehicle-mounted charger;

[0034] The wireless communication module adopts Lora, Zigbee, 4G, Bluetooth and other wireless communication modules in this scheme, and the communication module is selected according to the actual application scene;

[0035] The wireless communication module adopts AES encryption, sets a network password to ensure the safety of signal transmission, and the node without setting the password cannot join the network;

[0036] The wireless communication module adopts a master-slave node structure, and the wireless module in the orderly charging controller belongs to the slave node in the system. A master node is arranged in a certain area to receive the data of the orderly charging controller and send the charging control current to the orderly charging controller.

[0037] The control module judges the charging current of the electric vehicle by the frequency of the charging pile output, which is 1K, the PWM square wave duty cycle of high level 12V and low level-12V, the resistance of the charging cable, the charging demand of the battery pack in the vehicle, etc. The minimum current selected from the conditions is the charging current.

[0038] The control module controls the output PWM wave duty cycle to give the signal that the external charging condition of the electric vehicle does not meet the full power charging, so as to adjust the charging current by using the set PWM wave duty cycle. The specific circuit diagram is shown in Figure 2 ;

[0039] At the same time, as shown in the circuit diagram, Figure 3 the charging pile detects the vehicle access state, and only when the charging condition is met, the 220V alternating current power supply loop is closed; the control module switches through the internal loop to simulate the state of the vehicle accessing the charging gun, and provides the signal of closing the power supply loop to the charging pile through the pseudo circuit in the orderly charging controller to carry out normal charging.

[0040] The peripheral circuit includes current sensor signal conversion, temperature and humidity sensor signal acquisition and other parts.

[0041] As another embodiment of the present application, a charging start and end switch is specifically provided to avoid user's live plug-in operation; the user opens the switch after completing all connections, and then 220V AC output is available.

[0042] And for the mainstream AC slow charging pile on the market, there are three specifications of 3.5KW / 7KW / 11KW. If a 7KW orderly charging controller is used on a 3.5KW charging pile, it will cause damage to the charging pile. Therefore, the following solutions are used,

[0043] 3.5KW / 7KW / 11KW are distinguished in the software inside the controller, and different specifications of hardware are made for different slow charging piles;

[0044] A 4G, Wifi or Bluetooth module can be built in, and the charging pile specifications can be switched through the controller settings options, switches or smart methods such as mobile phone App.

[0045] For different vehicles, lengths of charging cables, charging environments, etc., the actual charging current may deviate from the required current value. The present solution dynamically adjusts the actual charging current to be consistent with the required current, thereby improving the control accuracy. The control module is also used to dynamically adjust the actual charging current according to the deviation of the actual charging current from the required current value, and the dynamic adjustment is specifically as follows:

[0046] The target current is sent by the energy controller;

[0047] Then the corresponding duty cycle square wave is output by the control module;

[0048] The actual output current is detected by the current sensor, the difference between the output current and the target current is judged, and the corresponding duty cycle square wave output by the control module is adjusted according to the difference, until the output current and the target current are consistent.

[0049] Some data in the above formula are calculated by removing the dimension and taking the numerical value, and the formula is obtained by simulating a large amount of data to obtain a formula closest to the real situation; the preset parameters and the preset threshold in the formula are set by the person skilled in the art according to the actual situation or obtained by a large amount of data simulation.

[0050] The above embodiments are only used to illustrate the technical method of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical method of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical method of the present application.

Claims

1. A wireless network-based intelligent orderly charging controller, characterized in that, The utility model relates to a charging system, including: The adapter is arranged between the charging gun and the slow charging port of the vehicle, and a control chip is arranged in the adapter. The control chip includes a power module, a control module, a wireless communication module, and a peripheral circuit. The power module is used to supply power to the entire control chip, provide 3.3V power supply for the wireless communication module, provide 5V power supply for the control module, and output ±12V voltage to provide a PWM square wave level for the on-board charger. The wireless communication module uses a wireless communication mode for communication, and the wireless communication mode includes Lora, Zigbee, 4G, and Bluetooth. The control module selects the minimum current that meets the applicable conditions as the charging current. The control module controls the output PWM wave duty cycle to send a signal to the external charging condition of the electric vehicle that does not meet the full-power charging condition, and adjusts the charging current by using the set PWM wave duty cycle. The alternative conditions are specifically: the electric vehicle charging current is determined by the PWM square wave duty cycle with a frequency of 1K, a high level of 12V, and a low level of -12V, the resistance of the charging cable, and the charging demand of the battery pack in the vehicle.

2. The intelligent orderly charging controller based on wireless network according to claim 1, characterized in that, The control module simulates the state of the vehicle connected to the charging gun, provides a signal for a closed power supply loop to the charging pile through a pseudo loop in the orderly charging controller, and performs normal charging.

3. The intelligent orderly charging controller based on wireless network according to claim 1, characterized in that, The peripheral circuit includes a current sensor signal conversion and a temperature and humidity sensor signal acquisition circuit.

4. The intelligent orderly charging controller based on wireless network according to claim 1, characterized in that, The wireless communication module uses AES encryption and sets a network password to ensure the safety of signal transmission. The wireless communication module uses a master-slave node structure, and the wireless module in the orderly charging controller belongs to a slave node in the system. The control module is also used to dynamically adjust the deviation between the actual charging current and the required current value. The dynamic adjustment method is specifically: The energy controller sends the target current. Then, the control module outputs the corresponding duty cycle square wave. The current sensor detects the actual output current, judges the difference between the output current and the target current, and adjusts the corresponding duty cycle square wave output by the control module according to the difference until the output current and the target current are consistent.

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