WO2018196321A1 - 一种大功率无线充电系统及其控制方法 - Google Patents
一种大功率无线充电系统及其控制方法 Download PDFInfo
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- WO2018196321A1 WO2018196321A1 PCT/CN2017/109506 CN2017109506W WO2018196321A1 WO 2018196321 A1 WO2018196321 A1 WO 2018196321A1 CN 2017109506 W CN2017109506 W CN 2017109506W WO 2018196321 A1 WO2018196321 A1 WO 2018196321A1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/007—Regulation of charging or discharging current or voltage
- H02J7/00712—Regulation of charging or discharging current or voltage the cycle being controlled or terminated in response to electric parameters
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- the present invention relates to the field of power transmission technologies, and in particular, to a high power wireless charging system and a control method thereof.
- the object of the present invention is to provide a high-power wireless charging system and a control method thereof, which can improve the transmission power of electric energy when wirelessly charging a device to be charged.
- the present invention provides the following technical solutions:
- a high-power wireless charging system comprising: n wireless energy transmission modules connected in parallel with each other for charging a device to be charged, n is an integer greater than 1; and each of the wireless energy transmission modules And an output of the device to be charged, a first control module for acquiring charging information of the device to be charged; and each of the wireless energy transmission modules The input end and the first control module are connected, and are configured to control, according to the charging information acquired by the first control module, a second control module that performs a corresponding action by each of the wireless energy transmission modules.
- the wireless energy transmission module includes: a PFC circuit connected to the power grid, a high frequency inverter power source connected to the PFC circuit, a transmission compensation circuit connected to the high frequency inverter power source, and the a transmitting coil connected to the transmitting compensation circuit, a receiving coil corresponding to the transmitting coil for wireless energy transmission, a receiving compensation circuit connected to the receiving coil, a rectifying circuit connected to the receiving compensation circuit, the rectifying circuit and the Tell the charging device connection.
- the second control module is connected to the PFC circuit through a signal interface or a communication bus interface to control opening and closing of the PFC circuit.
- the second control module is connected to the high frequency inverter power supply through a signal interface or a communication bus interface to adjust an output power of the high frequency inverter power supply.
- the first control module and the battery pack of the device to be charged and the BMS unit are connected for acquiring voltage information and current information of the battery pack and information of the BMS unit.
- the first control module and the rectifying circuit are connected to obtain a magnitude of an output current of the rectifying circuit.
- the first control module and the second control module are each provided with a wireless communication unit.
- a wireless charging control method for any of the above high power wireless charging systems comprising:
- Controlling by the first control module, acquisition of charging information of the device to be charged
- each of the wireless energy transmission modules is controlled by the second control module to perform a corresponding action to charge the to-be-charged device.
- controlling the first control module to acquire the charging information of the device to be charged includes:
- the voltage information and current information required for charging the battery pack of the device to be charged are acquired by the first control module.
- each of the wireless energy transmission modules to perform a corresponding action to charge the to-be-charged device according to the charging information, including:
- the second control module controls the PFC circuit of the corresponding wireless energy transmission module to start working according to the charging information, and controls the corresponding high frequency inverter power source to enter a soft start adjustment phase;
- the second control module increases an output power of each of the high frequency inverter power sources according to a preset power adjustment strategy
- the second control module controls each of the wireless energy transmission modules to perform corresponding constant voltage or constant current charging on the to-be-charged device.
- the method further includes:
- the second control module outputs a power down command to control the corresponding wireless energy transmission module to reduce the output power of the high frequency inverter power source;
- the second control module output power improvement command controls the corresponding wireless energy transmission module to increase the output power of the high frequency inverter power supply.
- each of the wireless energy transmission modules to perform corresponding constant voltage or constant current charging on the to-be-charged device, including:
- the second control module controls each of the wireless energy transmission modules to perform constant voltage charging on the device to be charged
- the second control module receives the charging voltage of the device to be charged through the first control module in real time. And an output current of each of the wireless energy transfer modules;
- the second control module controls each of the wireless energy transmission modules to perform constant current charging on the device to be charged
- the second control module receives the charging current of the device to be charged through the first control module in real time. And an output current of each of the wireless energy transfer modules;
- a high-power wireless charging system includes: n wireless energy transmission modules connected to a power grid for charging a device to be charged in parallel with each other, n being an integer greater than 1; An output end of each wireless energy transmission module and a device to be charged are connected to obtain a first control module for charging information of the device to be charged; and an input end of each wireless energy transmission module and the first control module are connected, according to the first The charging information acquired by the control module controls a second control module in which each wireless energy transmission module performs a corresponding action.
- the number is collected, and the collected charging parameter is fed back to the second control module, and the operation of each wireless energy transmission module is controlled by the calculation of the second control module, thereby controlling the entire charging system to perform reasonable charging to the device to be charged, which is convenient Quickly realize the expansion of the high-power wireless charging system, greatly improve the transmission power of the electric energy when charging the charging device, and satisfy the user's demand for greater power wireless charging.
- FIG. 1 is a schematic structural diagram of a high-power wireless charging system according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a specific high-power wireless charging system according to the present invention.
- FIG. 3 is a flowchart of a wireless charging control method according to an embodiment of the present invention.
- the core of the present invention is to provide a high-power wireless charging system and a control method thereof, which can improve the transmission power of electric energy when wirelessly charging a device to be charged.
- FIG. 1 is a schematic structural diagram of a high-power wireless charging system according to an embodiment of the present invention
- FIG. 2 is a schematic structural diagram of a specific high-power wireless charging system according to the present invention.
- a specific embodiment of the present invention provides a high-power wireless charging system, comprising: n wireless energy transmission modules 1 connected to a power grid for charging a device to be charged in parallel with each other, n is greater than 1
- An integer control unit connected to the output end of each wireless energy transmission module 1 and the device to be charged, for acquiring charging information of the device to be charged; and an input end of each wireless energy transmission module 1 and a first control module 2, the second control module 3 for controlling the respective wireless energy transmission modules 1 to perform corresponding actions according to the charging information acquired by the first control module 2.
- the wireless energy transmission module is connected to the power grid and the device to be charged, and the single wireless energy transmission module mainly includes two parts: a wireless energy transmitting unit and a wireless energy receiving unit.
- the wireless energy emitting unit can be installed on a charging pile or the like, and the wireless energy receiving unit is mounted on the device to be charged, such as installing the wireless energy receiving unit on a vehicle having a wireless charging function.
- FIG. 2 shows a schematic structural diagram of a specific high power wireless charging system.
- n is 2 is as follows.
- the single wireless energy transmitting unit includes: a PFC circuit 11 connected to the power grid, a high frequency inverter power supply 12 connected to the PFC circuit 11, and a high frequency inverter power supply 12 A connected transmission compensation circuit 13, a transmission coil 14 connected to the transmission compensation circuit 13, a reception coil 15 for transmitting wireless energy corresponding to the transmission coil 14, a reception compensation circuit 16 connected to the reception coil 15, and a reception compensation circuit 16 are connected.
- the rectifier circuit 17 and the rectifier circuit 17 are connected to the device to be charged.
- the PFC circuit is a power factor correction circuit, which functions to improve power utilization, reduce line loss, ensure electromagnetic compatibility of equipment, and convert AC power from the power grid into DC power.
- the function of the high-frequency inverter power supply is to convert the DC power outputted by the PFC circuit into a high-frequency inverter power source that drives the transmitting system according to the resonant frequency of the transmitting system, and can adjust its own output power.
- the compensation circuit and the coil form a wireless energy transmission unit, and the compensation circuit is added to the electromagnetic coupling coil to obtain a large transmission power and transmission efficiency.
- the function of the rectifier circuit is to convert the high frequency alternating current into direct current and transmit it to the device to be charged.
- the device to be charged may be a lead-acid battery pack, a lithium battery pack or an ultracapacitor pack.
- the second control module is connected to each PFC circuit through a signal interface or a communication bus interface, and controls opening and closing of each PFC circuit, that is, controlling the on/off of each PFC circuit;
- the module is connected to each high-frequency inverter power supply through a signal interface or a communication bus interface, and adjusts the output voltage and current of each high-frequency inverter power supply to achieve output power adjustment.
- the first control module is connected to each rectifier circuit for acquiring the magnitude of the output current of each rectifier circuit; the first control module is connected to the battery pack of the device to be charged and the BMS unit for acquiring the voltage information of the battery pack. And current information and information of the BMS unit. Further, the first control module and the second control module are each provided with a wireless communication unit. The first control module and the second control module can realize information interaction by means of wireless data communication.
- the wireless energy transmission modules can be combined in parallel according to the total power demand of the high-power wireless charging system to expand the charging power.
- the PFC circuit, the high frequency inverter power supply, the transmission compensation circuit, the transmitting coil, the receiving coil, the receiving compensation circuit, and the rectifying circuit can adopt a standardized and modular design.
- a wireless power transmission system with larger power is formed, and the first control module collects various preset charging parameters of the charging device end, and The collected charging parameter is fed back to the second control module, and the operation of each wireless energy transmission module is controlled by the calculation of the second control module, thereby controlling the entire charging system to perform reasonable charging to the device to be charged, and the high power can be conveniently and quickly realized.
- the expansion of the wireless charging system greatly increases the power transmission power of the charging device when it is wirelessly charged, and satisfies the user's demand for higher power wireless charging.
- FIG. 3 is a flowchart of a wireless charging control method according to an embodiment of the present invention.
- an embodiment of the present invention further provides a wireless charging control method for the high-power wireless charging system provided by any of the foregoing embodiments, including:
- S11 Receive a charging command of the user by using the second control module.
- S12 Establish a communication connection between the second control module and the first control module according to the charging command.
- S13 Control the first control module to obtain charging information of the device to be charged, including: controlling a first control module and a BMS of the device to be charged to establish a handshake signal; and acquiring, by the first control module, voltage information required for charging the battery pack of the device to be charged And current information.
- each wireless energy transmission module is controlled by the second control module to perform a corresponding action to charge the charging device.
- each wireless energy transmission module is controlled by the second control module to perform corresponding actions.
- Charging the device to be charged comprising: the second control module controls the PFC circuit of the corresponding wireless energy transmission module to start working according to the charging information, and controls the corresponding high frequency inverter power source to enter the soft start adjustment phase; When the power supply is in the soft start adjustment phase state, the second control module increases the output power of each high frequency inverter power supply according to a preset power adjustment strategy; and determines the total output voltage or total current of each wireless energy transmission module through the second control module in real time. Whether the preset threshold of the device to be charged is reached; if yes, the second control module controls each wireless energy transmission module to perform corresponding constant voltage or constant current charging on the device to be charged.
- the second control module after receiving the charging command of the user, the second control module first establishes a communication connection with the first control module, and notifies the first control module to charge the battery pack of the device to be charged.
- the first control module After receiving the notification, the first control module establishes a software and hardware handshake signal with the BMS unit (battery management system unit) of the device to be charged.
- the BMS unit battery management system unit
- the BMS unit allows the battery pack to be charged and issues the battery pack to be charged.
- the charging information is sent to the first control module, and the first control module sends the charging information to the second control module, and the second control module controls the required wireless energy transmission module according to the voltage demand signal and the current demand information in the charging information.
- the PFC circuit in the power is turned on, and each corresponding high frequency inverter power supply enters the soft start adjustment stage.
- the second control module gradually increases the output power of each high frequency inverter power supply, and at this time, the voltage and current output by the rectifier circuit of each wireless energy transmission module are gradually increased, when each When the total voltage or the total current output by the wireless energy transmission module reaches the preset threshold of the device to be charged (the preset threshold may be the required value of the BMS of the device to be charged), the charging system enters a constant voltage or constant current charging state to be charged. The device is charging.
- the method when each of the high frequency inverter power supplies is in a soft start adjustment phase state, the method further includes: acquiring, by the first control module, a current value of each wireless energy transmission module output end; The current value of each wireless energy transmission module output terminal calculates a first average current value; determines whether the current value of each wireless energy transmission module output end is greater than the first average current value; if yes, the second control module outputs a power reduction command to control the corresponding wireless energy The transmission module reduces the output power of the high-frequency inverter power supply; if not, the second control module outputs the power improvement command to control the corresponding wireless energy transmission module to increase the output power of the high-frequency inverter power supply.
- each of the high-frequency inverter power sources herein refers to each of the wireless energy transmission modules that are in parallel use.
- the high-frequency inverter power supply, the second control module receives the current value of each wireless energy transmission module output end through the first control module in real time, and when the rectifier circuit of each wireless energy transmission module is connected with the battery pack of the device to be charged, The output current value of the rectifier circuit is used to calculate the current average value of the rectifier circuit at this time, which is recorded as the first average current value, and for the wireless energy transmission module whose output current is greater than the first average current value, by appropriately lowering the wireless energy transmission module
- the output power of the medium-high frequency inverter power supply is used to reduce the output current of the corresponding rectifier circuit.
- the output current of the corresponding rectifier circuit is increased by appropriately increasing the output power of the high frequency inverter power supply in the wireless energy transmission module. Therefore, the output current of each rectifier circuit is consistent during the soft start process, and the current sharing effect is achieved.
- the second control module controls each wireless energy transmission module to perform corresponding constant voltage or constant current charging on the charging device, including: when the second control module controls each wireless energy transmission module to be charged When performing constant voltage charging, the second control module receives the charging voltage of the device to be charged and the output current of each wireless energy transmission module in real time through the first control module; compares the charging voltage of the device to be charged with the preset BMS voltage threshold; Comparing the charging voltage of the charging device with the BMS voltage threshold, correspondingly controlling the rise and fall of the output power of the high frequency inverter power supply of all the wireless energy transmission modules; calculating the second average of the output ends of the wireless energy transmission modules by the second control module a current value; comparing a current value of the output end of each wireless energy transmission module with a second average current value; and correspondingly controlling the corresponding wireless energy transmission module according to a comparison result of the current value of the output end of each wireless energy transmission module and the second average current value
- the output power of the high frequency inverter power supply is raised
- the second control module receives the battery pack charging voltage of the device to be charged and the output current of each rectifier circuit acquired by the first control module in real time.
- the second control module reduces the output power of all the high frequency inverter power sources, thereby reducing the charging voltage of the battery pack; when the battery pack charging voltage
- the second control module increases the output power of all the high-frequency inverter power sources, thereby increasing the charging voltage of the battery pack; The charging voltage of the battery pack is stabilized at the required voltage value of the BMS.
- the second control module also calculates the current average value of the rectifier circuit, which is recorded as the second average current value, and appropriately reduces the output power of the corresponding high frequency inverter power source for the rectifier circuit whose output current is greater than the second average current value. , reducing the output current of the rectifier circuit; for the rectifier circuit whose output current is smaller than the second average current value, increasing the output power of the high-frequency inverter power supply corresponding thereto, thereby increasing the output current of the rectifier circuit; thereby ensuring constant During the voltage charging process, the output currents of the rectifier circuits are the same, and the current sharing effect is achieved.
- the second control module controls each wireless energy transmission module to perform constant current charging on the charging device, the second control module receives the charging current of the device to be charged and the output current of each wireless energy transmission module in real time through the first control module;
- the output power of the high frequency inverter power supply of all the wireless energy transmission modules is controlled accordingly;
- the output power of the high frequency inverter power supply of the corresponding wireless energy transmission module is controlled accordingly.
- the second control module receives the charging current of the battery pack and the output current of each rectifier circuit acquired by the first control module in real time.
- the second control module reduces the output power of all the high frequency inverter power sources, thereby reducing the charging current of the battery pack;
- the battery pack charging current is less than the required current value of the BMS,
- the second control module increases the output power of all the high-frequency inverter power sources, thereby increasing the charging current of the battery pack; and through the repeated adjustment of the above process, the battery current is stabilized at the required current value of the BMS.
- the second control module also calculates the current average value of the rectifier circuit, which is recorded as the third average current value, and appropriately reduces the output power of the corresponding high frequency inverter power source for the rectifier circuit whose output current is greater than the third average current value. , reducing the output current of the rectifier circuit; for the rectifier circuit whose output current is less than the third average current value, by appropriately increasing the corresponding high frequency inverse
- the output power of the variable power supply increases the output current of the rectifier circuit; thereby ensuring that the output current of each rectifier circuit is uniform during the constant current charging process, and the current sharing effect is achieved.
- the high-power wireless charging system and the control method thereof provided by the present invention are performed by using a wireless energy transmission module in parallel, and performing a battery management system on the first control module, the second control module, and the device to be charged.
- the organic combination can realize the expansion of the large-power wireless charging system conveniently and quickly, and meet the user's demand for a larger power wireless charging system.
- the wireless energy transmission modules are connected in parallel, and the components of the charging system can be standardized and modularized.
- the system of obtaining the required energy transmission power can be obtained by simply changing the number of wireless energy transmission modules connected in parallel, improving versatility, reliability, and maintainability.
Abstract
一种大功率无线充电系统及其控制方法，该系统包括：与电网连接，用于为待充电设备进行充电的相互之间并联的n个无线能量传输模块；与各无线能量传输模块的输出端以及待充电设备连接，用于获取待充电设备的充电信息的第一控制模块；与各无线能量传输模块的输入端以及第一控制模块连接，用于根据第一控制模块获取的充电信息控制各无线能量传输模块进行相应动作的第二控制模块。通过将较小功率的n个无线能量传输模块进行并联扩容，实现有机的组合，形成较大功率的无线能量传输系统，可以方便快捷地实现大功率无线充电系统的扩容，在对待充电设备进行无线充电时大大提高了电能的传输功率，满足用户对更大功率无线充电的需求。
Description
本申请要求于2017年4月28日提交中国专利局、申请号为201710294110.7、发明名称为“一种大功率无线充电系统及其控制方法”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
本发明涉及电能传输技术领域，特别是涉及一种大功率无线充电系统及其控制方法。
随着科学技术的发展以及环保的需求，越来越多的产业向着绿色环保的方向发展。
诸如汽车等产品现如今也逐步向着电能动力的方向发展，各种各样的产品虽然应用电能可以减少对环境的污染，但是为了保证各种产品的正常使用就必须保证其电能的供应，对这些产品设备的供电问题成为人们关注的重中之重。目前，人们常常使用无线充电装置对待充电设备进行充电，但是由于受到电力电子器件电气参数的限制，无线充电装置的电能传输功率大小受到了很大的限制。
因此，如何在对待充电设备进行无线充电时提高电能的传输功率，是本领域技术人员目前需要解决的技术问题。
发明内容
本发明的目的是提供一种大功率无线充电系统及其控制方法，可以在对待充电设备进行无线充电时提高电能的传输功率。
为解决上述技术问题，本发明提供了如下技术方案：
一种大功率无线充电系统，包括：与电网连接，用于为待充电设备进行充电的相互之间并联的n个无线能量传输模块，n为大于1的整数；与各所述无线能量传输模块的输出端以及所述待充电设备连接，用于获取所述待充电设备的充电信息的第一控制模块；与各所述无线能量传输模块的
输入端以及所述第一控制模块连接，用于根据所述第一控制模块获取的所述充电信息控制各所述无线能量传输模块进行相应动作的第二控制模块。
优选地，所述无线能量传输模块包括：与所述电网连接的PFC电路，与所述PFC电路连接的高频逆变电源，与所述高频逆变电源连接的发射补偿电路，与所述发射补偿电路连接的发射线圈，与所述发射线圈对应进行无线能量传输的接收线圈，与所述接收线圈连接的接收补偿电路，与所述接收补偿电路连接的整流电路，所述整流电路和所述待充电设备连接。
优选地，所述第二控制模块通过信号接口或通信总线接口和所述PFC电路连接，控制所述PFC电路的开闭。
优选地，所述第二控制模块通过信号接口或通信总线接口和所述高频逆变电源连接，调节所述高频逆变电源的输出功率。
优选地，所述第一控制模块和所述待充电设备的电池组以及BMS单元连接，用于获取所述电池组的电压信息和电流信息以及所述BMS单元的信息。
优选地，所述第一控制模块和所述整流电路连接，用于获取所述整流电路的输出电流的大小。
优选地，所述第一控制模块和所述第二控制模块均设有无线通信单元。
一种无线充电控制方法，用于上述任一大功率无线充电系统，包括：
通过所述第二控制模块接收用户的充电命令；
根据所述充电命令，建立所述第二控制模块和所述第一控制模块的通信连接；
控制所述第一控制模块获取所述待充电设备的充电信息；
根据所述充电信息，通过所述第二控制模块控制各所述无线能量传输模块进行相应动作以对所述待充电设备进行充电。
优选地，所述控制所述第一控制模块获取所述待充电设备的充电信息，包括：
控制所述第一控制模块和所述待充电设备的BMS建立握手信号；
通过所述第一控制模块获取所述待充电设备的电池组充电所需的电压信息和电流信息。
优选地，所述根据所述充电信息，通过所述第二控制模块控制各所述无线能量传输模块进行相应动作以对所述待充电设备进行充电，包括：
所述第二控制模块根据所述充电信息控制对应的无线能量传输模块的PFC电路开机工作，并控制对应的高频逆变电源进入软启动调整阶段；
在各所述高频逆变电源处于软启动调整阶段状态时，所述第二控制模块根据预设的功率调整策略提高各所述高频逆变电源的输出功率；
通过所述第二控制模块实时判断各所述无线能量传输模块的输出总电压或总电流是否达到所述待充电设备的预设阈值；
若是，则通过所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行相应的恒压或恒流充电。
优选地，在各所述高频逆变电源处于软启动调整阶段状态时，还包括：
通过所述第一控制模块获取各所述无线能量传输模块输出端的电流值；
通过所述第二控制模块根据各所述无线能量传输模块输出端的电流值计算第一平均电流值；
判断各所述无线能量传输模块输出端的电流值是否大于所述第一平均电流值；
若是，则所述第二控制模块输出功率下降指令控制对应的无线能量传输模块降低自身高频逆变电源的输出功率；
若否，则所述第二控制模块输出功率提高指令控制对应的无线能量传输模块提高自身高频逆变电源的输出功率。
优选地，所述通过所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行相应的恒压或恒流充电，包括：
当所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行恒压充电时，所述第二控制模块通过所述第一控制模块实时接收所述待充电设备的充电电压和各所述无线能量传输模块的输出电流；
比较所述待充电设备的充电电压和预设的BMS电压阈值；
根据所述待充电设备的充电电压和所述BMS电压阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；
通过所述第二控制模块计算各所述无线能量传输模块的输出端的第二平均电流值；
比较各所述无线能量传输模块的输出端的电流值和所述第二平均电流值；
根据各所述无线能量传输模块的输出端的电流值和所述第二平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降；
当所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行恒流充电时，所述第二控制模块通过所述第一控制模块实时接收所述待充电设备的充电电流和各所述无线能量传输模块的输出电流；
比较所述待充电设备的充电电流和预设的BMS电流阈值；
根据所述待充电设备的充电电流和所述BMS电流阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；
通过所述第二控制模块计算各所述无线能量传输模块的输出端的第三平均电流值；
比较各所述无线能量传输模块的输出端的电流值和所述第三平均电流值；
根据各所述无线能量传输模块的输出端的电流值和所述第三平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降。
与现有技术相比，上述技术方案具有以下优点：
本发明实施例所提供的一种大功率无线充电系统，包括：与电网连接，用于为待充电设备进行充电的相互之间并联的n个无线能量传输模块，n为大于1的整数；与各无线能量传输模块的输出端以及待充电设备连接，用于获取待充电设备的充电信息的第一控制模块；与各无线能量传输模块的输入端以及第一控制模块连接，用于根据第一控制模块获取的充电信息控制各无线能量传输模块进行相应动作的第二控制模块。通过将较小功率的n个无线能量传输模块进行并联扩容，实现有机的组合，形成较大功率的无线能量传输系统，由第一控制模块对待充电设备端的各种预设充电参
数进行采集，并将采集的充电参数反馈给第二控制模块，经过第二控制模块的计算来控制各无线能量传输模块的运行，从而控制整个充电系统向待充电设备进行合理的充电，可以方便快捷地实现大功率无线充电系统的扩容，在对待充电设备进行无线充电时大大提高了电能的传输功率，满足用户对更大功率无线充电的需求。
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本发明一种具体实施方式所提供的大功率无线充电系统结构示意图；
图2为本发明一种具体的大功率无线充电系统结构示意图；
图3为本发明一种具体实施方式所提供的无线充电控制方法流程图。
本发明的核心是提供一种大功率无线充电系统及其控制方法，可以在对待充电设备进行无线充电时提高电能的传输功率。
为了使本发明的上述目的、特征和优点能够更为明显易懂，下面结合附图对本发明的具体实施方式做详细的说明。
在以下描述中阐述了具体细节以便于充分理解本发明。但是本发明能够以多种不同于在此描述的其它方式来实施，本领域技术人员可以在不违背本发明内涵的情况下做类似推广。因此本发明不受下面公开的具体实施方式的限制。
请参考图1和图2，图1为本发明一种具体实施方式所提供的大功率无线充电系统结构示意图；图2为本发明一种具体的大功率无线充电系统结构示意图。
本发明的一种具体实施方式提供了一种大功率无线充电系统，包括：与电网连接，用于为待充电设备进行充电的相互之间并联的n个无线能量传输模块1，n为大于1的整数；与各无线能量传输模块1的输出端以及待充电设备连接，用于获取待充电设备的充电信息的第一控制模块2；与各无线能量传输模块1的输入端以及第一控制模块2连接，用于根据第一控制模块2获取的充电信息控制各无线能量传输模块1进行相应动作的第二控制模块3。
在本实施方式中，无线能量传输模块连接电网和待充电设备，单个无线能量传输模块主要包括两部分：无线能量发射部和无线能量接收部。根据实际需要可以将无线能量发射部安装在充电桩等设备上，将无线能量接收部安装在待充电设备上，如将无线能量接收部安装在具有无线充电功能的车辆上。如图2所示，图2示出了一种具体的大功率无线充电系统结构示意图。在图2中以n为2为例进行说明，其中，单个无线能量发射部包括：与电网连接的PFC电路11，与PFC电路11连接的高频逆变电源12，与高频逆变电源12连接的发射补偿电路13，与发射补偿电路13连接的发射线圈14，与发射线圈14对应进行无线能量传输的接收线圈15，与接收线圈15连接的接收补偿电路16，与接收补偿电路16连接的整流电路17，整流电路17和待充电设备连接。
其中，PFC电路即功率因数校正电路，其作用是提高电力利用率、降低线路损耗、保证设备的电磁兼容性能，将来自电网的交流电转换成直流电。
高频逆变电源的作用是根据发射系统的谐振频率，将PFC电路输出的直流电转换成驱动发射系统的高频逆变电源，并可调节自身的输出功率。
补偿电路和线圈组成无线能量传输单元，在电磁耦合线圈加入补偿电路可获得较大的传输功率和传输效率。
整流电路的作用是将高频交流电转换为直流电，传输给待充电设备。
待充电设备可以是铅酸电池组、锂电池组或超级电容器组等。
进一步地，第二控制模块通过信号接口或通信总线接口和各PFC电路连接，控制各PFC电路的开闭，即控制各个PFC电路的开关机；第二控制
模块通过信号接口或通信总线接口和各高频逆变电源连接，调节各高频逆变电源的输出电压、电流以实现输出功率的调节。
更进一步地，第一控制模块和各整流电路连接，用于获取各整流电路的输出电流的大小；第一控制模块和待充电设备的电池组以及BMS单元连接，用于获取电池组的电压信息和电流信息以及BMS单元的信息。更进一步地，第一控制模块和第二控制模块均设有无线通信单元。第一控制模块和第二控制模块即可以通过无线数据通讯的方式实现信息的交互。
在本实施方式中，可以根据大功率无线充电系统的总功率需求将无线能量传输模块进行并联组合扩大充电功率。其中，PFC电路、高频逆变电源、发射补偿电路、发射线圈、接收线圈、接收补偿电路、整流电路可以采用标准化和模块化设计。通过将较小功率的n个无线能量传输模块进行并联扩容，实现有机的组合，形成较大功率的无线能量传输系统，由第一控制模块对待充电设备端的各种预设充电参数进行采集，并将采集的充电参数反馈给第二控制模块，经过第二控制模块的计算来控制各无线能量传输模块的运行，从而控制整个充电系统向待充电设备进行合理的充电，可以方便快捷地实现大功率无线充电系统的扩容，在对待充电设备进行无线充电时大大提高了电能的传输功率，满足用户对更大功率无线充电的需求。
请参考图3，图3为本发明一种具体实施方式所提供的无线充电控制方法流程图。
相应地，本发明一种实施方式还提供了一种无线充电控制方法，用于如上述任一实施方式所提供的大功率无线充电系统，包括：
S11：通过第二控制模块接收用户的充电命令。
S12：根据充电命令，建立第二控制模块和第一控制模块的通信连接。
S13：控制第一控制模块获取待充电设备的充电信息，包括：控制第一控制模块和待充电设备的BMS建立握手信号；通过第一控制模块获取待充电设备的电池组充电所需的电压信息和电流信息。
S14：根据充电信息，通过第二控制模块控制各无线能量传输模块进行相应动作以对待充电设备进行充电。
进一步地，通过第二控制模块控制各无线能量传输模块进行相应动作
以对待充电设备进行充电，包括：第二控制模块根据充电信息控制对应的无线能量传输模块的PFC电路开机工作，并控制对应的高频逆变电源进入软启动调整阶段；在各高频逆变电源处于软启动调整阶段状态时，第二控制模块根据预设的功率调整策略提高各高频逆变电源的输出功率；通过第二控制模块实时判断各无线能量传输模块的输出总电压或总电流是否达到待充电设备的预设阈值；若是，则通过第二控制模块控制各无线能量传输模块对待充电设备进行相应的恒压或恒流充电。
在本实施方式中，当第二控制模块接收到用户的充电命令后，首先与第一控制模块建立通信连接，并通知第一控制模块即将对待充电设备的电池组进行充电。第一控制模块接收到该通知后，与待充电设备的BMS单元(电池管理系统单元)建立软硬件握手信号，当握手信号建立后，BMS单元允许对电池组充电，并发出电池组充电所需要的充电信息给第一控制模块，第一控制模块将这些充电信息发送给第二控制模块，第二控制模块根据这些充电信息中的电压需求信号和电流需求信息等控制所需要的无线能量传输模块中的PFC电路开机工作，并使得各对应的高频逆变电源进入软启动调整阶段。
在高频逆变电源的软启动调整阶段，第二控制模块逐渐提高各高频逆变电源的输出功率，此时各无线能量传输模块的整流电路输出的电压和电流也逐渐增大，当各无线能量传输模块输出的总电压或总电流达到待充电设备的预设阈值时(该预设阈值可为待充电设备的BMS的要求值)，充电系统进入恒压或恒流充电状态为待充电设备进行充电。
在本发明的一种实施方式中，在各高频逆变电源处于软启动调整阶段状态时，还包括：通过第一控制模块获取各无线能量传输模块输出端的电流值；通过第二控制模块根据各无线能量传输模块输出端的电流值计算第一平均电流值；判断各无线能量传输模块输出端的电流值是否大于第一平均电流值；若是，则第二控制模块输出功率下降指令控制对应的无线能量传输模块降低自身高频逆变电源的输出功率；若否，则第二控制模块输出功率提高指令控制对应的无线能量传输模块提高自身高频逆变电源的输出功率。
在本实施方式中，当各高频逆变电源处于软启动调整阶段状态时，需要说明的是，此处的各高频逆变电源指的是处于并联使用中的无线能量传输模块中的各高频逆变电源，第二控制模块通过第一控制模块实时接收各无线能量传输模块输出端的电流值，当各无线能量传输模块的整流电路和待充电设备的电池组连接时，即实时接收各整流电路的输出电流值，以计算此时整流电路的电流平均值，记为第一平均电流值，对于输出电流大于该第一平均电流值的无线能量传输模块，通过适当降低该无线能量传输模块中高频逆变电源的输出功率以减少对应的整流电路的输出电流。对于输出电流小于该第一平均电流值的无线能量传输模块，通过适当提高该无线能量传输模块中高频逆变电源的输出功率以增大对应的整流电路的输出电流。从而保证软启动过程中，各整流电路的输出电流的一致，达到均流效果。
在本发明的一种实施方式中，通过第二控制模块控制各无线能量传输模块对待充电设备进行相应的恒压或恒流充电，包括：当第二控制模块控制各无线能量传输模块对待充电设备进行恒压充电时，第二控制模块通过第一控制模块实时接收待充电设备的充电电压和各无线能量传输模块的输出电流；比较待充电设备的充电电压和预设的BMS电压阈值；根据待充电设备的充电电压和BMS电压阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；通过第二控制模块计算各无线能量传输模块的输出端的第二平均电流值；比较各无线能量传输模块的输出端的电流值和第二平均电流值；根据各无线能量传输模块的输出端的电流值和第二平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降。
在恒压充电过程中，第二控制模块实时接收第一控制模块获取的待充电设备的电池组充电电压和各整流电路的输出电流。当电池组充电电压大于BMS的要求电压值(预设的BMS电压阈值)时，第二控制模块降低全部高频逆变电源的输出功率，从而减小电池组的充电电压；当电池组充电电压小于BMS的要求电压值时，第二控制模块提高全部高频逆变电源的输出功率，从而增大电池组的充电电压；通过上述过程的反复调节，使得
电池组的充电电压稳定在BMS的要求电压值。同时，第二控制模块也计算整流电路的电流平均值，记为第二平均电流值，对于输出电流大于第二平均电流值的整流电路，通过适当降低与其对应的高频逆变电源的输出功率，减小该整流电路的输出电流；对于输出电流小于第二平均电流值的整流电路，通过适当提高与其对应的高频逆变电源的输出功率，增大该整流电路的输出电流；从而保证恒压充电过程中，各整流电路的输出电流一致，达到均流效果。
当第二控制模块控制各无线能量传输模块对待充电设备进行恒流充电时，第二控制模块通过第一控制模块实时接收待充电设备的充电电流和各无线能量传输模块的输出电流；
比较待充电设备的充电电流和预设的BMS电流阈值；
根据待充电设备的充电电流和BMS电流阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；
通过第二控制模块计算各无线能量传输模块的输出端的第三平均电流值；
比较各无线能量传输模块的输出端的电流值和第三平均电流值；
根据各无线能量传输模块的输出端的电流值和第三平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降。
在恒流充电过程中，第二控制模块实时接收第一控制模块获取的电池组的充电电流和各整流电路的输出电流。当电池组充电电流大于BMS的要求电流值时，第二控制模块降低全部高频逆变电源的输出功率，从而减小电池组的充电电流；当电池组充电电流小于BMS的要求电流值时，第二控制模块提高全部高频逆变电源的输出功率，从而增大电池组的充电电流；通过上述过程的反复调节，实现电池充电电流稳定在BMS的要求电流值。同时，第二控制模块也计算整流电路的电流平均值，记为第三平均电流值，对于输出电流大于第三平均电流值的整流电路，通过适当降低与其对应的高频逆变电源的输出功率，减小该整流电路的输出电流；对于输出电流小于第三平均电流值的整流电路，通过适当提高与其对应的高频逆
变电源的输出功率，增大该整流电路的输出电流；从而保证恒流充电过程中，各整流电路的输出电流一致，达到均流效果。
综上所述，本发明所提供的大功率无线充电系统及其控制方法，通过并联使用无线能量传输模块，并与第一控制模块、第二控制模块以及待充电设备上的电池管理系统等进行有机结合，可以方便快捷地实现较大功率无线充电系统的扩容，满足用户对更大功率无线充电系统的需求；同时将各无线能量传输模块进行并联，可以实现充电系统组成部件的标准化、模块化，只需改变并联的无线能量传输模块的数量即可获得所需能量传输功率的系统，提高了通用性、可靠性和维护性。
以上对本发明所提供的一种大功率无线充电系统及其控制方法进行了详细介绍。本文中应用了具体个例对本发明的原理及实施方式进行了阐述，以上实施例的说明只是用于帮助理解本发明及其核心思想。应当指出，对于本技术领域的普通技术人员来说，在不脱离本发明原理的前提下，还可以对本发明进行若干改进和修饰，这些改进和修饰也落入本发明权利要求的保护范围内。
Claims (12)
- 一种大功率无线充电系统，其特征在于，包括：与电网连接，用于为待充电设备进行充电的相互之间并联的n个无线能量传输模块，n为大于1的整数；与各所述无线能量传输模块的输出端以及所述待充电设备连接，用于获取所述待充电设备的充电信息的第一控制模块；与各所述无线能量传输模块的输入端以及所述第一控制模块连接，用于根据所述第一控制模块获取的所述充电信息控制各所述无线能量传输模块进行相应动作的第二控制模块。
- 根据权利要求1所述的系统，其特征在于，所述无线能量传输模块包括：与所述电网连接的PFC电路，与所述PFC电路连接的高频逆变电源，与所述高频逆变电源连接的发射补偿电路，与所述发射补偿电路连接的发射线圈，与所述发射线圈对应进行无线能量传输的接收线圈，与所述接收线圈连接的接收补偿电路，与所述接收补偿电路连接的整流电路，所述整流电路和所述待充电设备连接。
- 根据权利要求2所述的系统，其特征在于，所述第二控制模块通过信号接口或通信总线接口和所述PFC电路连接，控制所述PFC电路的开闭。
- 根据权利要求3所述的系统，其特征在于，所述第二控制模块通过信号接口或通信总线接口和所述高频逆变电源连接，调节所述高频逆变电源的输出功率。
- 根据权利要求2至4任一项所述的系统，其特征在于，所述第一控制模块和所述待充电设备的电池组以及BMS单元连接，用于获取所述电池组的电压信息和电流信息以及所述BMS单元的信息。
- 根据权利要求5所述的系统，其特征在于，所述第一控制模块和所述整流电路连接，用于获取所述整流电路的输出电流的大小。
- 根据权利要求6所述的系统，其特征在于，所述第一控制模块和所述第二控制模块均设有无线通信单元。
- 一种无线充电控制方法，用于如权利要求1至7任一项所述的大功率无线充电系统，其特征在于，包括：通过所述第二控制模块接收用户的充电命令；根据所述充电命令，建立所述第二控制模块和所述第一控制模块的通信连接；控制所述第一控制模块获取所述待充电设备的充电信息；根据所述充电信息，通过所述第二控制模块控制各所述无线能量传输模块进行相应动作以对所述待充电设备进行充电。
- 根据权利要求8所述的方法，其特征在于，所述控制所述第一控制模块获取所述待充电设备的充电信息，包括：控制所述第一控制模块和所述待充电设备的BMS建立握手信号；通过所述第一控制模块获取所述待充电设备的电池组充电所需的电压信息和电流信息。
- 根据权利要求9所述的方法，其特征在于，所述根据所述充电信息，通过所述第二控制模块控制各所述无线能量传输模块进行相应动作以对所述待充电设备进行充电，包括：所述第二控制模块根据所述充电信息控制对应的无线能量传输模块的PFC电路开机工作，并控制对应的高频逆变电源进入软启动调整阶段；在各所述高频逆变电源处于软启动调整阶段状态时，所述第二控制模块根据预设的功率调整策略提高各所述高频逆变电源的输出功率；通过所述第二控制模块实时判断各所述无线能量传输模块的输出总电压或总电流是否达到所述待充电设备的预设阈值；若是，则通过所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行相应的恒压或恒流充电。
- 根据权利要求10所述的方法，其特征在于，在各所述高频逆变电源处于软启动调整阶段状态时，还包括：通过所述第一控制模块获取各所述无线能量传输模块输出端的电流值；通过所述第二控制模块根据各所述无线能量传输模块输出端的电流值计算第一平均电流值；判断各所述无线能量传输模块输出端的电流值是否大于所述第一平均电流值；若是，则所述第二控制模块输出功率下降指令控制对应的无线能量传输模块降低自身高频逆变电源的输出功率；若否，则所述第二控制模块输出功率提高指令控制对应的无线能量传输模块提高自身高频逆变电源的输出功率。
- 根据权利要求11所述的方法，其特征在于，所述通过所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行相应的恒压或恒流充电，包括：当所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行恒压充电时，所述第二控制模块通过所述第一控制模块实时接收所述待充电设备的充电电压和各所述无线能量传输模块的输出电流；比较所述待充电设备的充电电压和预设的BMS电压阈值；根据所述待充电设备的充电电压和所述BMS电压阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；通过所述第二控制模块计算各所述无线能量传输模块的输出端的第二平均电流值；比较各所述无线能量传输模块的输出端的电流值和所述第二平均电流值；根据各所述无线能量传输模块的输出端的电流值和所述第二平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降；当所述第二控制模块控制各所述无线能量传输模块对所述待充电设备进行恒流充电时，所述第二控制模块通过所述第一控制模块实时接收所述待充电设备的充电电流和各所述无线能量传输模块的输出电流；比较所述待充电设备的充电电流和预设的BMS电流阈值；根据所述待充电设备的充电电流和所述BMS电流阈值的比较结果，相应控制所有的无线能量传输模块的高频逆变电源的输出功率的升降；通过所述第二控制模块计算各所述无线能量传输模块的输出端的第三平均电流值；比较各所述无线能量传输模块的输出端的电流值和所述第三平均电流 值；根据各所述无线能量传输模块的输出端的电流值和所述第三平均电流值的比较结果，相应控制对应的无线能量传输模块的高频逆变电源的输出功率的升降。
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