技术领域technical field
本发明涉及电力工程技术，具体涉及电动汽车充电站充电系统。The invention relates to electric power engineering technology, in particular to a charging system of an electric vehicle charging station.
背景技术Background technique
随着电动汽车的快速发展，使用电动汽车的人群数量在逐年增长，用户的充电需求十分迫切，增加充电设施建设可以缓解紧张的充电需求。目前常规的电动汽车智能充电站，充电策略较为单一，无法满足不同情境下的充电需求，容易引发超负荷的情况，而对配电网的负荷、电压等造成严重影响，甚至影响居民的生活用电与工业生产用电。With the rapid development of electric vehicles, the number of people using electric vehicles is increasing year by year, and the charging needs of users are very urgent. Increasing the construction of charging facilities can alleviate the tight charging needs. At present, the conventional smart charging stations for electric vehicles have a relatively simple charging strategy, which cannot meet the charging needs in different situations, and easily lead to overload conditions, which have a serious impact on the load and voltage of the distribution network, and even affect the residents' daily life. Electricity and industrial production.
发明内容SUMMARY OF THE INVENTION
本发明所要解决的技术问题就是提供一种电动汽车智能充电站充电系统，实现多种策略充电，适应不同情境下的充电需求The technical problem to be solved by the present invention is to provide an intelligent charging station charging system for electric vehicles, which can realize charging with various strategies and adapt to the charging needs in different situations.
为解决上述技术问题，本发明采用如下技术方案：一种电动汽车智能充电站充电系统，包括充电机及对应该充电机设置的若干充电终端，所述充电机包括交流配电模块、若干整流模块、开关矩阵以及功率控制器，其中，所述交流配电模块为若干充电终端供电，所述开关矩阵根据功率控制器的控制指令对若干整流模块进行动态控制；所述功率控制器按照以下充电策略下达充电功率分配和负荷调节指令；In order to solve the above technical problems, the present invention adopts the following technical scheme: an electric vehicle intelligent charging station charging system, including a charger and a plurality of charging terminals corresponding to the charger, and the charger includes an AC power distribution module and a plurality of rectifier modules. , a switch matrix and a power controller, wherein the AC power distribution module supplies power to several charging terminals, and the switch matrix dynamically controls several rectifier modules according to the control instructions of the power controller; the power controller follows the following charging strategy Issue charging power distribution and load regulation instructions;
全功率轮序充电：Full power round-sequence charging:
a)每组群控充电单元，可以实现每台充电终端输出恒功率大电流快速充电，在充电结束之前，其余充电终端均不提供充电服务；a) Each group of group-controlled charging units can realize fast charging with constant power and high current output from each charging terminal, and the remaining charging terminals will not provide charging services until the end of charging;
b)在充电过程中当分配给车辆的充电功率出现冗余时，在满足充电电流的前提下将冗余功率单元逐个切除，然后进入闲置功率充电模块序列；b) When there is redundancy in the charging power allocated to the vehicle during the charging process, the redundant power units are cut off one by one under the premise of satisfying the charging current, and then enter the idle power charging module sequence;
平均功率充电：Average power charging:
每组群控充电单元，若干充电终端均输出相同的充电功率，同时对与充电终端对应连接的车辆进行充电；For each group of charging units, several charging terminals output the same charging power, and at the same time charge the vehicles connected to the charging terminals;
自由式动态功率充电：Freestyle Dynamic Power Charging:
按照车辆进入充电序列的顺序，依次满足充电功率需求，保证进入充电序列车辆能够随时充电的原则设计；具体控制逻辑要求如下：According to the order in which the vehicle enters the charging sequence, the charging power requirements are met in turn to ensure that the vehicle entering the charging sequence can be charged at any time. The specific control logic requirements are as follows:
a)当车辆进入充电序列时，如果充电机的闲置功率≥充电需求功率，则按充电需求分配输出相应的充电功率对车辆充电；如果充电机的闲置功率＜充电需求功率，则以闲置功率对车辆充电；a) When the vehicle enters the charging sequence, if the idle power of the charger ≥ the required charging power, the corresponding charging power will be distributed and output according to the charging requirement to charge the vehicle; if the idle power of the charger < vehicle charging;
b)当车辆进入充电序列时，如果充电机无闲置功率，使用该充电口的绑定功率单元给该进入充电序列车辆进行充电；b) When the vehicle enters the charging sequence, if the charger has no idle power, use the bound power unit of the charging port to charge the vehicle entering the charging sequence;
c)在充电过程中当分配给车辆的充电功率出现冗余时，在满足充电电流的前提下将冗余功率充电模块逐个切除，然后进入闲置功率充电模块序列，按先进先出的原则分配给其它有需求的车辆使用。c) When there is redundancy in the charging power allocated to the vehicle during the charging process, the redundant power charging modules shall be cut off one by one under the premise of satisfying the charging current, and then the idle power charging module sequence shall be entered. Other vehicles in need.
优选的，所述交流配电模块包括进线断路器、接触器和防雷器，输出馈电设漏电保护开关，在充电连接输出端设直流快速熔断器，提供过载和短路保护功能。Preferably, the AC power distribution module includes an incoming circuit breaker, a contactor and a lightning arrester, a leakage protection switch is provided for the output feeder, and a DC fast fuse is provided at the output end of the charging connection to provide overload and short circuit protection functions.
优选的，所述充电机设有输入过压及欠压保护模块，当输入过压或欠压保护动作时，整流模块关机并告警。Preferably, the charger is provided with an input overvoltage and undervoltage protection module, and when the input overvoltage or undervoltage protection acts, the rectifier module shuts down and gives an alarm.
优选的，所述充电机设有输出过压及过流保护模块，当输出过压或过流保护动作时，整流模块关机并告警。Preferably, the charger is provided with an output overvoltage and overcurrent protection module, and when the output overvoltage or overcurrent protection acts, the rectifier module shuts down and gives an alarm.
优选的，所述充电机输出端设有用于防止动力电池电流向充电机倒灌隔离二极管。Preferably, the output end of the charger is provided with an isolation diode for preventing the current of the power battery from flowing back into the charger.
优选的，所述充电机设有过温保护模块，当内部超温时采取降功率输出；当过温保护动作时，整流模块关机并告警。Preferably, the charger is provided with an over-temperature protection module, which reduces power output when the internal temperature is over-temperature; when the over-temperature protection acts, the rectifier module shuts down and gives an alarm.
优选的，所述充电机在动态分配功率过程中，整流模块切除时输出残压，整流模块投入时对输出电流冲击进行限制。Preferably, during the dynamic power distribution process of the charger, the rectifier module outputs residual voltage when the rectifier module is turned off, and the output current impact is limited when the rectifier module is turned on.
优选的，还包括群控计费控制单元，所述群控计费控制单元与功率控制器和充电终端通信，下发充电开机命令并采集充电交易电度信息。Preferably, it also includes a group control charging control unit, the group control charging control unit communicates with the power controller and the charging terminal, issues a charging startup command and collects charging transaction electricity information.
优选的，所述充电机设有温湿度调节模块，温湿度调节模块对充电机机柜内的温湿度进行监测，并自动调节柜内温湿度处于设定范围。Preferably, the charger is provided with a temperature and humidity adjustment module, and the temperature and humidity adjustment module monitors the temperature and humidity in the cabinet of the charger, and automatically adjusts the temperature and humidity in the cabinet to be within a set range.
优选的，所述充电机设有水浸保护模块，所述水浸保护模块在浸入机柜内的水位达到一定高度时自动断开交流输入电源，同时发出告警信号。Preferably, the charger is provided with a water immersion protection module, and the water immersion protection module automatically disconnects the AC input power supply when the water level immersed in the cabinet reaches a certain height, and simultaneously issues an alarm signal.
本发明采用上述技术方案，充电机具有多种充电策略，适应不同情境下的充电需求。The present invention adopts the above technical solutions, and the charger has various charging strategies to adapt to the charging requirements in different situations.
本发明的具体技术方案及其有益效果将会在下面的具体实施方式中结合附图进行详细的说明。The specific technical solutions of the present invention and the beneficial effects thereof will be described in detail in the following specific embodiments in conjunction with the accompanying drawings.
附图说明Description of drawings
下面结合附图和具体实施方式对本发明作进一步描述：The present invention will be further described below in conjunction with accompanying drawing and specific embodiment:
图1为本发明的系统配置框图；Fig. 1 is the system configuration block diagram of the present invention;
图2为充电机电气原理框图；Figure 2 is a block diagram of the electrical principle of the charger;
图3为开关矩阵电气原理框图；Figure 3 is a block diagram of the electrical principle of the switch matrix;
图4为充电终端电气方案原理框图。Figure 4 is a schematic block diagram of the electrical scheme of the charging terminal.
具体实施方式Detailed ways
参考图1所示，变电站采用10kV三绕组变压器，其中高压侧接入10kV电网，为地区负荷供电；低压侧0.4kV接入电动汽车智能充电站，直接服务电动汽车充电设备，同时实现居民小区用电供给。其中，电动汽车智能充电站包括若干充电机，每个充电机连接6个充电终端，充电机采用户外设计，功率单元集中布置在充电机内部，充电终端布置停车位一端，充电终端采用单枪设计，配置人机交互界面及充电枪。另外，还设有充电监控系统，1路20A电源引入做为充电监控电源，每个变电站可配置站级监控系统，站级监控系统可将充电、交易、状态信息通过无线方式上传至区域监控平台，站级监控系统包括充电监控柜以及充电监控操作员站。Referring to Figure 1, the substation adopts a 10kV three-winding transformer, of which the high-voltage side is connected to the 10kV power grid to supply power for the regional load; electricity supply. Among them, the intelligent charging station for electric vehicles includes several chargers, each of which is connected to 6 charging terminals. The chargers are designed outdoors, the power units are centrally arranged inside the chargers, the charging terminals are arranged at one end of the parking space, and the charging terminals are designed with a single gun , configure the man-machine interface and charging gun. In addition, there is also a charging monitoring system. One 20A power supply is introduced as a charging monitoring power supply. Each substation can be equipped with a station-level monitoring system. The station-level monitoring system can upload charging, transaction, and status information to the regional monitoring platform wirelessly. , The station-level monitoring system includes a charging monitoring cabinet and a charging monitoring operator station.
参考图2和图3所示，所述充电机包括交流配电模块、12个整流模块、开关矩阵以及功率控制器，其中，所述交流配电模块为6个充电终端供电，所述开关矩阵具有9组功率单元，所述开关矩阵根据功率控制器的控制指令，将每组功率单元的输出在6路直流输出回路投切，1至6的直流输出回路与对应的6个充电终端连接。Referring to FIG. 2 and FIG. 3 , the charger includes an AC power distribution module, 12 rectifier modules, a switch matrix and a power controller, wherein the AC power distribution module supplies power for 6 charging terminals, and the switch matrix There are 9 groups of power units, and the switch matrix switches the output of each group of power units in 6 DC output circuits according to the control instructions of the power controller, and the DC output circuits 1 to 6 are connected to the corresponding 6 charging terminals.
其中，所述交流配电模块采用1路380V电源接入，进线侧包括进线断路器、接触器和防雷器，输出馈电设漏电保护开关，在充电连接输出端设直流快速熔断器，提供过载和短路保护功能。Among them, the AC power distribution module is connected by 1 channel of 380V power supply, the incoming line side includes incoming line circuit breaker, contactor and lightning arrester, the output feeder is provided with a leakage protection switch, and the charging connection output end is provided with a DC fast fuse , provides overload and short circuit protection.
整流模块采用宽电压输出范围(200V～750V)，恒功率控制15kW智能高频开关电源，12个整流模块分为9组功率单元，1-6组功率单元功率为15kW，分别连接1至6的直流输出回路，7-9组功率单元功率为30kW，7-9组功率单元通过开关矩阵可灵活将每组功率单元投切在1至6的直流输出回路。The rectifier module adopts a wide voltage output range (200V ~ 750V), constant power control 15kW intelligent high-frequency switching power supply, 12 rectifier modules are divided into 9 groups of power units, 1-6 groups of power units are 15kW, connected to 1 to 6 power units respectively. DC output circuit, the power of 7-9 groups of power units is 30kW, 7-9 groups of power units can flexibly switch each group of power units in the DC output circuit of 1 to 6 through the switch matrix.
开关矩阵采用高压直流接触器，并根据功率控制器的控制指令，将每组功率单元的输出在6路充电连接输出端投切，实现动态分配。The switch matrix adopts high-voltage DC contactors, and according to the control instructions of the power controller, the output of each group of power units is switched on and off at the 6-way charging connection output terminals to achieve dynamic distribution.
所述功率控制器分别与充电终端、整流模块和开关矩阵通信，根据车辆充电需求，按预定的控制策略下达充电功率分配和负荷调节指令，同时向监控系统发送充电机设备状态和告警信息。The power controller communicates with the charging terminal, the rectifier module and the switch matrix respectively, and issues charging power distribution and load adjustment instructions according to the vehicle charging requirements according to the predetermined control strategy, and simultaneously sends the charger equipment status and alarm information to the monitoring system.
其中，充电机的充电策略描述如下：Among them, the charging strategy of the charger is described as follows:
全功率轮序充电：Full power round-sequence charging:
a)每组群控充电单元，1台充电终端输出180kW的充电功率，可实现大电流快速充电，在充电结束之前，其余充电终端均不提供充电服务；a) For each group of group-controlled charging units, one charging terminal outputs 180kW of charging power, which can realize high-current fast charging, and the remaining charging terminals do not provide charging services until the end of charging;
b)在充电过程中当分配给车辆的充电功率出现冗余时，在满足充电电流的前提下将冗余功率单元逐个切除，然后进入闲置功率充电模块序列。b) When there is redundancy in the charging power allocated to the vehicle during the charging process, the redundant power units are cut off one by one under the premise of satisfying the charging current, and then the idle power charging module sequence is entered.
平均功率充电：Average power charging:
每组群控充电单元，6台充电终端均输出30kW的充电功率，同时对6台车辆进行充电。In each group of group-controlled charging units, 6 charging terminals output a charging power of 30kW and charge 6 vehicles at the same time.
自由式动态功率充电：Freestyle Dynamic Power Charging:
a)按照车辆进入充电序列的顺序，依次满足充电功率需求，保证进入充电序列车辆能够随时充电的原则设计；具体控制逻辑要求如下：a) According to the order in which the vehicle enters the charging sequence, the charging power requirements are met in turn to ensure that the vehicle entering the charging sequence can be charged at any time; the specific control logic requirements are as follows:
b)当车辆进入充电序列时，如果充电机的闲置功率≥充电需求功率，则按充电需求分配输出相应的充电功率对车辆充电；如果充电机的闲置功率＜充电需求功率，则以剩余闲置功率输出对车辆充电；b) When the vehicle enters the charging sequence, if the idle power of the charger ≥ the required charging power, the corresponding charging power will be distributed and output according to the charging requirement to charge the vehicle; if the idle power of the charger is less than the required charging power, the remaining idle power will be used. The output charges the vehicle;
c)当车辆进入充电序列时，如果充电机无闲置功率，使用该充电口的绑定功率单元给该进入充电序列车辆进行充电；c) When the vehicle enters the charging sequence, if the charger has no idle power, use the bound power unit of the charging port to charge the vehicle entering the charging sequence;
d)在充电过程中当分配给车辆的充电功率出现冗余时，在满足充电电流的前提下将冗余功率充电模块逐个切除，然后进入闲置功率充电模块序列，按先进先出的原则分配给其它有需求的车辆使用。d) When there is redundancy in the charging power allocated to the vehicle during the charging process, the redundant power charging modules are cut off one by one under the premise of satisfying the charging current, and then the idle power charging module sequence is entered, and allocated to the vehicle according to the principle of first-in, first-out. Other vehicles in need.
另外，所述充电机设有输入过压及欠压保护模块，当输入过压或欠压保护动作时，整流模块关机并告警。In addition, the charger is provided with an input overvoltage and undervoltage protection module. When the input overvoltage or undervoltage protection acts, the rectifier module shuts down and gives an alarm.
所述充电机设有输出过压及过流保护模块，当输出过压或过流保护动作时，整流模块关机并告警。The charger is provided with an output overvoltage and overcurrent protection module. When the output overvoltage or overcurrent protection acts, the rectifier module shuts down and gives an alarm.
所述充电机输出端设有用于防止动力电池电流向充电机倒灌隔离二极管。The output end of the charger is provided with an isolation diode for preventing the current of the power battery from flowing back into the charger.
所述充电机设有过温保护模块，当内部超温时采取降功率输出；切当过温保护动作时，整流模块关机并告警。The charger is provided with an over-temperature protection module, which reduces power output when the internal temperature is over-temperature; when the over-temperature protection acts, the rectifier module shuts down and gives an alarm.
所述充电机在动态分配功率过程中，整流模块切除时输出残压，整流模块投入时具备输出电流冲击限制能力。In the process of dynamically distributing power, the charger outputs residual voltage when the rectifier module is cut off, and has the ability to limit the impact of output current when the rectifier module is put on.
所述充电机设有温湿度调节模块，温湿度调节模块对充电机机柜内的温湿度进行监测，并自动调节柜内温湿度处于设定范围。The charger is provided with a temperature and humidity adjustment module, and the temperature and humidity adjustment module monitors the temperature and humidity in the cabinet of the charger, and automatically adjusts the temperature and humidity in the cabinet to be within a set range.
所述充电机设有水浸保护模块，所述水浸保护模块在浸入机柜内的水位达到一定高度时自动断开交流输入电源，同时发出告警信号。The charger is provided with a water immersion protection module, and the water immersion protection module automatically disconnects the AC input power supply when the water level immersed in the cabinet reaches a certain height, and simultaneously issues an alarm signal.
充电机具备柜门开启保护功能，当充电机柜的门被打开时自动断开交流输入电源，同时发出告警信号。The charger has the door opening protection function. When the door of the charging cabinet is opened, the AC input power supply is automatically disconnected, and an alarm signal is issued at the same time.
充电机的机柜具备防尘功能，其通风散热的进出口设置滤网、静电吸附装置，滤网可拆安装，方便维护拆卸清洗。The cabinet of the charger has a dustproof function. The inlet and outlet for ventilation and heat dissipation are equipped with filters and electrostatic adsorption devices. The filters can be disassembled and installed, which is convenient for maintenance, disassembly and cleaning.
群控计费控制单元采用计算机控制，1个CAN口与功率控制器、充电终端通信，采集充电机状态信息、充电信息、车辆电池信息；1个CAN口与充电终端通信，下发充电开机命令并采集充电交易电度信息，执行集群负荷调控指令。The group control billing control unit is controlled by a computer. One CAN port communicates with the power controller and charging terminal to collect charger status information, charging information, and vehicle battery information; one CAN port communicates with the charging terminal to issue charging start commands. And collect charging transaction electricity information, and execute cluster load regulation instructions.
参考图4所示，所述充电终端包括与充电机连接的充电桩、与充电桩连接的充电电缆、与充电电缆连接的车辆插头，充电桩设有充电控制器。所述充电控制器采用计算机控制，与充电机、车辆电池管理系统通信，负责与车辆连接确认、电池管理系统(BMS)通信及充电流程控制，上送车辆连接状态、电池充电需求、充电桩状态等信息。Referring to FIG. 4 , the charging terminal includes a charging pile connected to the charger, a charging cable connected to the charging pile, and a vehicle plug connected to the charging cable, and the charging pile is provided with a charging controller. The charging controller adopts computer control, communicates with the charger and the vehicle battery management system, is responsible for confirming the connection with the vehicle, communicating with the battery management system (BMS) and charging process control, and uploading the vehicle connection status, battery charging requirements, and charging pile status. and other information.
所述充电控制器设有主动安全保护模块，所述主动安全保护模块对动力蓄电池和充电终端进行监控，包括动力蓄电池充电参数、充电需求、充电总状态和电池状态信息，并结合充电终端工作状态信息进行综合判断，在充电过程中满足主动安全保护条件时执行主动安全保护措施。The charging controller is provided with an active safety protection module, which monitors the power battery and the charging terminal, including the charging parameters of the power battery, the charging demand, the overall charging status and the battery status information, and combines the working status of the charging terminal. The information is comprehensively judged, and the active safety protection measures are implemented when the active safety protection conditions are met during the charging process.
所述主动安全保护条件包括：The active safety protection conditions include:
a)最高单体动力蓄电池电压大于最高允许充电电压；a) The highest single power battery voltage is greater than the highest allowable charging voltage;
b)最高动力蓄电池温度大于最高允许温度；b) The maximum power battery temperature is greater than the maximum allowable temperature;
c)充电桩电压输出值、车辆充电电压需求值或者电池充电电压测量值大于最高允许充电总电压；c) The charging pile voltage output value, the vehicle charging voltage demand value or the battery charging voltage measurement value is greater than the maximum allowable total charging voltage;
d)充电桩电流输出值、车辆充电电流需求值或者电池充电电流测量值大于最高允许充电电流；d) The current output value of the charging pile, the vehicle charging current demand value or the battery charging current measurement value is greater than the maximum allowable charging current;
e)充电桩累计充电电量大于动力蓄电池标称总能量；e) The accumulative charging power of the charging pile is greater than the nominal total energy of the power battery;
f)动力蓄电池充电电压测量值与充电机电压输出值相差±15V以上；f) The difference between the measured value of the power battery charging voltage and the voltage output value of the charger is more than ±15V;
g)动力蓄电池充电电流测量值与充电机电流输出值相差±15A以上；g) The difference between the measured value of the charging current of the power battery and the current output value of the charger is more than ±15A;
h)动力蓄电池当前荷电状态SOC和估算剩余充电时间在5min内没变化；h) The current state of charge SOC of the traction battery and the estimated remaining charging time have not changed within 5 minutes;
所述主动安全保护措施包括在1s内停止充电、断开高压直流接触器和低压辅助电源继电器、上传告警信息。The active safety protection measures include stopping charging within 1s, disconnecting the high-voltage DC contactor and the low-voltage auxiliary power relay, and uploading alarm information.
所述主动安全保护措施包括在1s内停止充电、断开高压直流接触器和低压辅助电源继电器、上传告警信息。主动安全保护功能可本地或远程选择配置。The active safety protection measures include stopping charging within 1s, disconnecting the high-voltage DC contactor and the low-voltage auxiliary power relay, and uploading alarm information. Active security features can be optionally configured locally or remotely.
另外，在充电过程中发生下列情况，则充电控制器控制充电机停止充电，并在100ms内断开高压直流接触器和低压辅助电源继电器，In addition, if the following conditions occur during the charging process, the charging controller controls the charger to stop charging, and disconnects the high-voltage DC contactor and low-voltage auxiliary power relay within 100ms,
a)充电机出现不能继续充电的故障；a) The charger fails to continue charging;
b)触发急停开关动作；b) Trigger the emergency stop switch action;
c)充电桩与电动汽车之间的保护地线断开；c) The protective ground wire between the charging pile and the electric vehicle is disconnected;
d)充电桩与电动汽车之间的连接确认信号断开。d) The connection confirmation signal between the charging pile and the electric vehicle is disconnected.
如果充电桩与车辆BMS如发生通信超时，则停止充电，并在10s内断开高压直流接触器，之后重新发起通信握手开始充电；如果重新连接3次仍未成功，即确认通信中断，则停止本次充电，在10s断开高压直流接触器和低压辅助电源继电器。If the communication between the charging pile and the vehicle BMS times out, the charging will be stopped, and the high-voltage DC contactor will be disconnected within 10s, and then the communication handshake will be restarted to start charging; For this charging, disconnect the high-voltage DC contactor and the low-voltage auxiliary power relay within 10s.
所述车辆插头设有与车辆充电接口锁止的电子锁和机械锁，当电子锁处于锁止位置时，机械锁无法操作，所述充电控制器能判断电子锁是否可靠锁止，当电子锁未可靠锁止时，充电桩停止充电或不能启动充电，在充电桩失电情况下，电子锁能自动解锁，所述电子锁具备异常情况下应急解锁功能。The vehicle plug is provided with an electronic lock and a mechanical lock that are locked with the vehicle charging interface. When the electronic lock is in the locked position, the mechanical lock cannot be operated, and the charging controller can determine whether the electronic lock is reliably locked. When it is not locked reliably, the charging pile stops charging or cannot start charging. In the event of a power failure of the charging pile, the electronic lock can be automatically unlocked, and the electronic lock has an emergency unlocking function under abnormal conditions.
所述充电桩具备车桩匹配预判功能，车辆准备就绪充电启动阶段，在车辆端直流接触器闭合后，充电桩检测到车辆端电池电压，然后与车辆发送的整车动力蓄电池当前电池电压进行比较，如果二者差值不超过±15V，且电池电压检测值在充电机输出电压范围内，则允许充电启动过程；如果二者差值超过±15V，或电池电压检测值超过充电机的输出电压范围，则中止充电启动过程。The charging pile has the function of pre-judging the matching of the vehicle pile, and the vehicle is ready to start charging. After the DC contactor at the vehicle end is closed, the charging pile detects the battery voltage at the vehicle end, and then compares the current battery voltage of the vehicle power battery sent by the vehicle. Comparison, if the difference between the two does not exceed ±15V, and the battery voltage detection value is within the output voltage range of the charger, the charging start process is allowed; if the difference between the two exceeds ±15V, or the battery voltage detection value exceeds the output of the charger. voltage range, the charging start process is terminated.
所述充电桩具备预充电功能，车辆准备就绪充电启动阶段，在充电桩检测到车辆端电池电压并确认车桩匹配正常后进行预充电控制，将充电机输出电压调节到与电池电压测量值之差小于10V，再闭合充电桩直流接触器，充电桩直流接触器接通时发生的车辆到充电设备、或者充电设备到车辆的冲击电流控制在20A以下。The charging pile has a pre-charging function. In the stage when the vehicle is ready for charging, after the charging pile detects the voltage of the battery at the vehicle end and confirms that the matching of the vehicle pile is normal, the pre-charging control is performed, and the output voltage of the charger is adjusted to be equal to the measured value of the battery voltage. If the difference is less than 10V, then close the DC contactor of the charging pile, and the inrush current from the vehicle to the charging equipment, or from the charging equipment to the vehicle, which occurs when the DC contactor of the charging pile is turned on, is controlled below 20A.
所述充电控制器设有泄放控制模块，所述泄放控制模块与泄放电路通讯连接，正常充电结束或非正常充电中止时，在充电桩直流接触器断开后泄放控制模块控制泄放电路及时对充电机输出电压进行泄放，并在1秒内将直流输出电压降到60V以下。The charging controller is provided with a discharge control module, which is connected in communication with the discharge circuit. When the normal charging ends or the abnormal charging is terminated, the discharge control module controls the discharge after the DC contactor of the charging pile is disconnected. The discharge circuit discharges the output voltage of the charger in time, and reduces the DC output voltage to below 60V within 1 second.
所述充电桩具备直流接触器状态监视功能，判断接触器每次闭合与断开动作状态是否与控制命令一致，如果不一致则中止充电流程，同时在接触器每次断开后进行触点粘连检测，当发现有粘连情况发生时，充电桩告警并停止服务。The charging pile has the function of monitoring the state of the DC contactor, which judges whether the closing and opening of the contactor is consistent with the control command. , when it is found that there is adhesion, the charging pile will give an alarm and stop the service.
所述充电控制器设有对直流输出电路进行绝缘监测的绝缘监测模块，并且能与电动汽车的绝缘监测功能相配合。充电桩的绝缘监测功能满足GB/T18487.1-2015中附录B.4.1和B.4.2的规定。The charging controller is provided with an insulation monitoring module for monitoring the insulation of the DC output circuit, and can cooperate with the insulation monitoring function of the electric vehicle. The insulation monitoring function of the charging pile meets the requirements of Appendix B.4.1 and B.4.2 in GB/T18487.1-2015.
所述充电控制器具备存储车辆充电记录功能。The charging controller has the function of storing vehicle charging records.
所述充电桩设有辅助电源模块。所述充电桩设有对充电接口输出电能进行计量的计量模块。计量模块应采用符合GB/T 29318-2012《电动汽车非车载充电机电能计量》规定的智能直流电能表，电流线路经分流器接入并和计量模块一体化封装设计，接线及安装方式满足快速拆装要求，方便用户检定。The charging pile is provided with an auxiliary power module. The charging pile is provided with a metering module that measures the electrical energy output by the charging interface. The metering module should be an intelligent DC energy meter that complies with GB/T 29318-2012 "Electric Energy Measurement of Off-Board Chargers for Electric Vehicles". The current line is connected through a shunt and integrated with the metering module. Disassembly and assembly requirements are convenient for user verification.
充电桩具备充电数据记录功能，在连接车辆充电过程中对下列数据进行采集、存储。充电桩循环存储至少3条充电记录，并具备掉电保护功能。The charging pile has a charging data recording function, which collects and stores the following data during the charging process of the connected vehicle. The charging pile stores at least 3 charging records cyclically, and has the function of power failure protection.
a)配置阶段动力蓄电池充电参数报文(BCP)；a) Power battery charging parameter message (BCP) in configuration stage;
b)充电阶段电池充电需求报文(BCL)，采样周期≤1min；b) During the charging phase, the battery charging demand message (BCL), the sampling period is less than or equal to 1min;
c)充电阶段电池充电总状态报文(BCS)，采样周期≤1min；c) During the charging phase, the battery charging status message (BCS), the sampling period is ≤1min;
d)充电阶段充电机充电状态报文(CCS)，采样周期≤1min；d) During the charging stage, the charging status message (CCS) of the charger, the sampling period is less than or equal to 1min;
e)充电阶段动力蓄电池状态信息报文(BSM)，采样周期≤1min；e) Power battery status information message (BSM) in charging stage, sampling period ≤1min;
f)充电阶段车辆中止充电报文(BST)；f) During the charging phase, the vehicle stops charging message (BST);
g)充电阶段充电机中止充电报文(CST)；g) During the charging phase, the charger terminates the charging message (CST);
h)充电结束阶段车辆统计数据报文(BSD)；h) vehicle statistics data message (BSD) at the end of charging;
i)充电结束阶段充电机统计数据报文(CSD)。i) Charger statistical data message (CSD) at the end of charging.
充电桩具备对充电控制过程中的各种异常信息进行采集、告警、存储的功能，告警记录存储不少于200条，并具备掉电保护功能。The charging pile has the functions of collecting, alarming, and storing various abnormal information in the charging control process, storing no less than 200 alarm records, and has the function of power failure protection.
充电桩具备运行状态指示功能，包括“电源”、“充电”、“告警”，采用LED指示灯。The charging pile has the function of running status indication, including "power supply", "charging", "alarm", and adopts LED indicator light.
充电桩具备湿度控制模块，对充电桩湿度进行调节，防止产生凝露危害。The charging pile is equipped with a humidity control module to adjust the humidity of the charging pile to prevent condensation hazards.
充电桩内部元器件安装高度距底部不小于600mm，防止水侵危害。The installation height of the internal components of the charging pile is not less than 600mm from the bottom to prevent water damage.
充电桩结构为前开门，满足靠墙安装维护。The charging pile structure is a front door, which can be installed and maintained against the wall.
以上所述，仅为本发明的具体实施方式，但本发明的保护范围并不局限于此，熟悉该本领域的技术人员应该明白本发明包括但不限于上面具体实施方式中描述的内容。任何不偏离本发明的功能和结构原理的修改都将包括在权利要求书的范围中。The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Those skilled in the art should understand that the present invention includes but is not limited to the contents described in the above specific embodiments. Any modifications that do not depart from the functional and structural principles of the present invention are intended to be included within the scope of the claims.
| Application Number | Priority Date | Filing Date | Title |
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| CN201811209115.6ACN109572454B (en) | 2018-10-17 | 2018-10-17 | An electric vehicle intelligent charging station charging system |
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| CN201811209115.6ACN109572454B (en) | 2018-10-17 | 2018-10-17 | An electric vehicle intelligent charging station charging system |
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| CN109572454Atrue CN109572454A (en) | 2019-04-05 |
| CN109572454B CN109572454B (en) | 2021-04-06 |
| Application Number | Title | Priority Date | Filing Date |
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| CN201811209115.6AActiveCN109572454B (en) | 2018-10-17 | 2018-10-17 | An electric vehicle intelligent charging station charging system |
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