CN105182854B - A kind of charging pile distributed director - Google Patents

Abstract

The invention relates to a distributed controller of a charging pile. A microcontroller is combined with a corresponding functional circuit to form various intelligent function modules, and each intelligent function module and a main control unit are connected to each other through a CAN bus to form a distributed controller. Since the overall stability of the distributed controller depends on the functional circuit with the lowest stability, the stability of the charging pile controller is greatly improved, maintenance costs are reduced, and faults are easily checked; at the same time, each intelligent function module and the main control unit Based on the CAN bus interconnection mode, the functional modules can be flexibly mounted and unloaded on the bus, so that the charging pile controller of the present invention has strong expansion ability and wide application range.

Description

A charging pile distributed controller

technical field

The invention belongs to the technical field of electric vehicle charging control, and in particular relates to a distributed controller of a charging pile.

Background technique

Electric vehicles have become one of my country's strategic emerging industries due to their advantages of no pollution, low noise, high energy utilization rate, simple structure, and convenient maintenance. Hybrid electric vehicle, pure electric vehicle and fuel cell vehicle technology, develop plug-in hybrid electric vehicle, pure electric vehicle research and development and large-scale commercial demonstration projects, and promote industrial application. The International Climate Organization conducted interviews with 40 electric vehicle-related industry experts, and the results show that the importance of charging infrastructure construction ranks second among many factors affecting the development of electric vehicles, surpassing the purchase price factor, second only to battery technology, which ranks first Raise factor. All parties have reached a consensus on the basic and key role of charging facilities.

Charging piles are the main components of charging facilities. According to charging types, charging piles are divided into AC piles, DC piles, and AC and DC dual charging; according to the number of charging ports, they are divided into one machine with two charges, one machine with four charges, one machine with six charges, etc. . At present, the national standards for electric vehicles and charging facilities are not perfect. Various car manufacturers have launched many electric vehicles with different charging methods according to their own conditions and needs. For charging facility manufacturers, only different electric vehicles Customized design.

The controller is the core control unit of the charging pile, and customizing the charging pile is basically equal to customizing the controller. At present, the design of the controller mostly adopts a centralized control method. A microcontroller MCU chip is used as the brain of the entire charging pile controller. The peripheral functional circuits are directly connected to the microcontroller MCU and are uniformly controlled by the microcontroller MCU. This centralized controller has the following problems: 1. Poor stability. Any small problem on the controller will cause the entire controller to fail. For example, if there are 10 functional circuits on a circuit board, the stability of each functional circuit It is 0.9. If the centralized control method is adopted, its overall stability is 0.9 ¹⁰ =0.3487. It can be seen that the overall stability is much lower than the stability of each functional circuit; This type of controller can only be used by one or several types of charging piles, and cannot be used universally; 3. The maintainability is poor. Once the controller has a problem, it is difficult to troubleshoot, the amount of maintenance is large, and the probability of scrapping is high, which increases the cost.

Contents of the invention

The purpose of the present invention is to provide a distributed controller for charging piles to solve the problem of poor stability of charging pile controllers in the prior art.

To achieve the above object, the solution of the present invention includes:

A charging pile distributed controller, including a main control unit, an AC connection control module and/or a DC connection control module, a contactor contact detection module, an input and output module, an electric meter module, and a charger control module; The modules all include their own controllers and corresponding functional circuits; the functional circuits of the AC connection control module and/or the DC connection control module are used to realize CC control guidance, electronic lock control, auxiliary power control, output contactor control, DC / AC output voltage acquisition and BMS communication; the functional circuit of the contactor contact detection module is used to realize the state detection of the output contactor; the functional circuit of the input and output module is used to realize the system state switch-in detection, discharge , gun head ready, etc.; the functional circuit of the electric meter module is used to realize power metering; the functional circuit of the charger control module is used to realize the voltage and current output control of the charger, and the state detection of the charger; the main control The unit and the contactor contact detection module, the input and output module, the ammeter module, the charger control module, the AC connection control module and/or the DC connection control module are connected to each other through a CAN bus.

The charging pile distributed controller also includes a shunt current detection module, the shunt current detection module includes a respective microcontroller and a corresponding functional circuit; the functional circuit of the shunt current detection module is used to realize the output current Detection; the shunt current detection module is connected to the CAN bus.

The charging pile distributed controller also includes an insulation detection module, and the insulation detection module includes a respective microcontroller and a corresponding functional circuit; the functional circuit of the insulation detection module is used to realize insulation detection; the insulation detection module Connect the CAN bus.

The charging pile distributed controller also includes a charging gun head temperature detection module, and the charging gun head temperature detection module includes a respective microcontroller and a corresponding functional circuit; the functional circuit of the charging gun head temperature detection module is used to realize charging Gun head temperature detection; the charging gun head temperature detection module is connected to the CAN bus.

The beneficial effects of the present invention are: the micro-controller is combined with corresponding functional circuits to form various intelligent function modules, and each intelligent function module and the main control unit are connected to each other through the CAN bus to form a distributed controller. Since the overall stability of the distributed controller depends on the functional circuit with the lowest stability, the stability of the charging pile controller is greatly improved, maintenance costs are reduced, and faults are easily checked; at the same time, each intelligent function module and the main control unit Based on the CAN bus interconnection mode, the functional modules can be flexibly mounted and unloaded on the bus, so that the charging pile controller of the present invention has strong expansion ability and wide application range.

At the same time, for the controller in the centralized control mode in the prior art, there are many software processes and tasks, and the operating system can only be selected to realize the software functions. There is a relationship between each process and task, and a slight modification may cause other unknown problems. Software stability is low. For the distributed controller of the present invention, each intelligent function module is a simple software system corresponding to a task. All intelligent function modules are interconnected through CAN bus to form a large intelligent system. As long as the CAN communication protocol is defined and the addresses and priorities of each intelligent unit are assigned, it can be put into use. This high cohesion and low coupling method will greatly reduce the difficulty of software design and improve software stability.

Description of drawings

Fig. 1 is the schematic structural diagram of the controller of the embodiment of the present invention;

Fig. 2 is a system diagram of a DC charging pile controller according to an embodiment of the present invention.

Detailed ways

The present invention will be described in further detail below in conjunction with the accompanying drawings.

As shown in Figure 1, the charging pile distributed controller of the present invention includes a main control unit and various intelligent function modules. The function module, the microcontroller MCU is connected to the CAN bus through the built-in or set interface.

The main control unit is used to realize human-computer interaction and big data background communication. At the same time, the main control unit is also responsible for real-time monitoring of all intelligent function modules connected to the bus, and detects the operating status of each intelligent function module. If any If the intelligent function module operates abnormally, a warning is output.

The main control unit communicates with each intelligent function module and between each intelligent function module through the CAN bus. The CAN bus is a typical multi-master system, which makes any intelligent function module connected to the CAN bus have sovereignty and can control and operate other intelligent function modules. At the same time, the CAN bus is open, and intelligent function modules can be added or reduced arbitrarily, which is easy to expand.

The charging operation of the distributed controller of the charging pile will be described in detail below using the DC charging pile controller. As shown in Figure 2, the DC charging pile controller includes a main control unit and various intelligent function modules. The main control unit is used to realize human-computer interaction, background communication and status monitoring of intelligent function modules.

Each intelligent function module includes a DC connection control module, an insulation detection module, a contactor contact detection module, a charging gun head temperature detection module, a shunt current detection module, a switch input and output module, an electric meter module and a charger control module.

Each module includes its own controller and corresponding functional circuit; the DC connection control module is used to realize CC control guidance, electronic lock control, auxiliary power control, output contactor control, DC output voltage acquisition, BMS communication; the insulation detection module is used It is used to realize insulation detection; the contactor contact detection module is used to realize the output contactor state detection; the charging gun head temperature detection module is used to realize the charging gun head temperature detection; the shunt current detection module is used to realize the output current detection; The output module is used to realize the system state switch-in detection, output control such as discharge and gun head ready; the meter module is used to realize power measurement; the charger control module is used to realize the voltage and current output control of the charger, and the charger status detection.

The main control unit communicates with each module and each module through the CAN bus. Each module transmits the wire core to the main control unit through the CAN bus, and each module also notifies the corresponding receiving module of the command information through the CAN bus. After sending the command signal to the CAN bus, the corresponding receiving module detects the command signal. Take the corresponding action.

After the controller is powered on, each intelligent module checks itself, and sends its own status information to the main control unit through the CAN bus. The main control unit judges the operating status of all intelligent modules and displays them through the man-machine interface; if any module runs If abnormal, output an alarm. When each module is running normally, the main control unit will display the normal operation of each module through the human-computer interaction interface, and then the charging operation can be performed, and the charging gun head can be inserted into the charging port of the electric vehicle.

The DC connection control module detects the connection status of the charging gun head. After the connection is completed, it controls the closing of the electronic lock and the closing of the auxiliary power relay, and sends a charging handshake message to the BMS of the electric vehicle. The BMS receives the message and replies indicating that the charging preparation has been completed. . The DC connection control module transmits the status information at this time to the main control unit through the CAN bus, and at the same time notifies the insulation detection module to start the insulation detection.

The main control unit tracks and updates the charging state in real time, and the insulation detection module responds to the DC connection control module after receiving the insulation detection start command from the DC connection control module, and the DC connection control module controls the output contactor to close. When the contactor contact detection module confirms that the current output contactor is in the closed state, it notifies the charger control module to control the output voltage of the charger for insulation detection.

The insulation detection module performs insulation detection on the output bus, and feeds back the detection results to the main control unit, and at the same time notifies the charger control module to stop the voltage output of the charger; after the charger control module stops the voltage output of the charger, it notifies the input and output modules to open The discharge circuit quickly discharges the output voltage of the charger, and disconnects the discharge circuit after the discharge is completed. After the output voltage discharge is completed, the DC connection control module disconnects the output contactor, and the contactor contact detection module detects that the current output contactor is in the disconnected state, and the DC connection control module and the BMS identify the parameters of the charger and the vehicle; at the same time Collect the battery voltage to ensure that the battery voltage is within the output voltage range of the charger. After the parameter matching is completed, the DC connection control module closes the output contactor, and after the contactor contact detection module confirms the closure, the charging process enters the ready state.

The BMS sends the battery charging demand voltage, current and battery charging status to the DC connection control module in real time. The DC connection control module forwards the required voltage and current to the charger control module, and the charger control module controls the charger to output as required.

During the charging process, the ammeter module measures the charging power in real time, and transmits the measurement information to the main control unit; the shunt current detection module detects the output current in real time, and transmits the output current information to the main control unit; the temperature of the charging gun head The detection module detects the temperature of the charging gun head in real time, and transmits the detection information to the main control unit; the main control unit monitors the operation detection status of each intelligent module in real time, and promptly notifies the relevant modules for processing when encountering a fault.

When the battery is fully charged, the BMS sends full information to the DC connection control module, and the DC connection control module notifies the charger control module to stop the output of the charger. Open the output contactor, disconnect the auxiliary power relay, and unlock the electronic lock. After that, you can unplug the charging head from the car, and the charging is complete.

In the above embodiment, the charging pile distributed controller further includes a shunt current detection module, and the shunt current detection module includes respective microcontrollers and corresponding functional circuits for realizing output current detection. As another implementation manner, the distributed controller of the charging pile does not include a shunt current detection module.

In the above embodiment, the distributed controller of the charging pile further includes an insulation detection module, and the insulation detection module includes a respective microcontroller and a corresponding functional circuit for realizing insulation detection. As another implementation manner, the distributed controller of the charging pile does not include an insulation detection module.

In the above embodiment, the distributed controller of the charging pile further includes a temperature detection module of the charging gun head, and the temperature detection module of the charging gun head includes a respective microcontroller and a corresponding functional circuit, which is used to realize the charging gun head temperature check. As another implementation manner, the distributed controller of the charging pile does not include a charging gun head temperature detection module.

In the above embodiment, the distributed controller of the charging pile includes a DC connection control module, an insulation detection module, a contactor contact detection module, a charging gun head temperature detection module, a shunt current detection module, and an input and output module. , electric meter module and charger control module. As another implementation manner, the distributed controller of the charging pile further includes an air pressure intelligent function module, such as an AC connection control module, a display module, and the like.

Claims (4)

1. a kind of charging pile distributed director, it is characterised in that：Including main control unit, exchange link control module and/or straight Flow link control module, contacts of contactor detection module, input and output module, meter module and charger control module；Institute Stating each module all includes respective controller and corresponding functional circuit；The exchange link control module and/or direct current connection The functional circuit of control module is used to implement CC controls guiding, electronic lock controls, accessory power supply controls, output contactor controls, DC/AC output voltage gathers and BMS communications；The functional circuit of the contacts of contactor detection module is used to implement output and connects Tentaculum state-detection；The functional circuit of the input and output module is used to implement system mode and opens into detection, release, pipette tips it is ready Output control；The functional circuit of the meter module is used to implement electric quantity metering；The functional circuit of the charger control module It is used to implement the output control of charger voltage and current, charger state-detection；The main control unit and contacts of contactor detection mould Block, input and output module, meter module, charger control module, exchange link control module and/or direct current link control module It is interconnected by a CAN bus, is communicated between main control unit and each module and between each module by CAN bus.

2. charging pile distributed director according to claim 1, it is characterised in that：The charging pile distributed director Current divider current detection module is further included, the current divider current detection module includes respective microcontroller and corresponding function Circuit；The functional circuit of the current divider current detection module is used to implement output electric current measure；The current divider current detecting Module connects the CAN bus.

3. charging pile distributed director according to claim 1, it is characterised in that：The charging pile distributed director Insulation monitoring module is further included, the insulation monitoring module includes respective microcontroller and corresponding functional circuit；It is described exhausted The functional circuit of edge detection module is used to implement Insulation monitoring；The insulation monitoring module connects the CAN bus.

4. charging pile distributed director according to claim 1, it is characterised in that：The charging pile distributed director Further include charging pipette tips temperature detecting module, the charging pipette tips temperature detecting module includes respective microcontroller and corresponding Functional circuit；The functional circuit of charging pipette tips temperature detecting module is used to implement charging pipette tips temperature detection；The charging pipette tips Temperature detecting module connects the CAN bus.