WO2014176853A1 - 阵列式无线电力发射系统及其接收端定位方法 - Google Patents

阵列式无线电力发射系统及其接收端定位方法 Download PDF

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Publication number
WO2014176853A1
WO2014176853A1 PCT/CN2013/083271 CN2013083271W WO2014176853A1 WO 2014176853 A1 WO2014176853 A1 WO 2014176853A1 CN 2013083271 W CN2013083271 W CN 2013083271W WO 2014176853 A1 WO2014176853 A1 WO 2014176853A1
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WIPO (PCT)
Prior art keywords
receiving end
circuit
coils
capacitive sensing
coil
Prior art date
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PCT/CN2013/083271
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English (en)
French (fr)
Inventor
李聃
董秀莲
张从鹏
刘宝
孙伟
刁德鹏
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Haier Group Corp
Haier Group Technology Research and Development Center
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Haier Group Corp
Haier Group Technology Research and Development Center
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Publication of WO2014176853A1 publication Critical patent/WO2014176853A1/zh
Anticipated expiration legal-status Critical
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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H02J50/12—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling of the resonant type
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/10—Circuit arrangements or systems for wireless supply or distribution of electric power using inductive coupling
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/40—Circuit arrangements or systems for wireless supply or distribution of electric power using two or more transmitting or receiving devices
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J50/00—Circuit arrangements or systems for wireless supply or distribution of electric power
    • H02J50/90—Circuit arrangements or systems for wireless supply or distribution of electric power involving detection or optimisation of position, e.g. alignment

Definitions

  • the present invention relates to the field of wireless charging, and in particular, to an array type wireless power transmitting system and a receiving end positioning method thereof.
  • BACKGROUND With the rapid development of electronic technologies, various electronic devices quickly enter people's lives.
  • people have several kinds of electronic devices that have become very common. For example, a person can have several mobile phones, IPAD, MP4 and other electronic devices at the same time. While these electronic devices bring great convenience and fun to people's lives, they also cause a series of troublesome problems, such as charging of these electronic devices.
  • the charging interfaces of these electronic devices are generally different, which means that people need several different charging devices when they have several electronic devices.
  • most charging devices are connected to the power supply by wire.
  • the wireless charging system includes a transmitting end and a receiving end, and the transmitting end is a wireless charging device, and the receiving end is a variety of electronic devices to be charged.
  • the array wireless charging system is a good solution.
  • the transmitting end of the wireless charging system has an array of coils composed of a plurality of coils.
  • the positioning of the receiving end is performed, and after the receiving end is positioned, the electric energy is transmitted by one or more coils near the receiving end.
  • the positioning of the array wireless charging system to the receiving end generally adopts the polling mode of the coil, that is, each coil in the transmitting end coil array transmits electric energy in turn, by detecting the voltage current change of each coil in the transmitting end coil array or according to receiving The communication information returned by the terminal is connected. The positioning of the receiving end.
  • the transmitting end of the array type wireless charging system needs to transmit electric energy on multiple coils in turn, which has energy loss, and the selection and control switching of multiple coils is complicated. In many cases, all the coils need to be polled once to locate the receiver. In this process, it takes a long time and sends invalid power, which causes electromagnetic loss and electromagnetic radiation. Visible polling can be seen. The method is not a very good receiver positioning method.
  • the present invention provides an array type wireless power transmitting system and a receiving end positioning method thereof.
  • An array type wireless power transmission system includes:
  • One or more capacitive induction coils for sensing the proximity of the receiving end, and when the receiving end is close to the one or more capacitive sensing coils, the capacitance values of the one or more capacitive sensing coils are changed, wherein each capacitive sensing The coil corresponds to one or more energy transmitting coils;
  • the capacitive sensing positioning circuit is configured to determine a capacitive sensing coil in which a receiving end is placed, wherein an input end of the capacitive sensing positioning circuit is connected to the one or more capacitive sensing coils, and an output end of the capacitive sensing positioning circuit is connected to the energy emitting circuit.
  • the capacitive sensing positioning circuit includes:
  • a capacitance collecting sub-circuit configured to collect a capacitance value of the one or more capacitive sensing coils and send the capacitance value to a capacitive sensing positioning control sub-circuit, wherein the capacitance collecting sub-circuit and the one or more capacitive induction coils a capacitive sensing positioning control sub-circuit, configured to receive and store one of the capacitor collection sub-circuits
  • the capacitance value of the one or more capacitive sensing coils is determined according to the change of the capacitance value of the one or more capacitive sensing coils, wherein the capacitive sensing coil is disposed near the receiving end, wherein the input end of the capacitive sensing positioning control sub-circuit and the capacitor
  • the acquisition sub-circuit is connected, and the output end of the capacitive sensing positioning control sub-circuit is connected to the energy-emitting circuit.
  • the energy transmitting circuit comprises a control sub-circuit, a driving sub-circuit, an inverter sub-circuit, a capacitor array and an energy transmitting coil array, and an input end of the control sub-circuit is connected to an output end of the capacitive sensing positioning sub-circuit
  • the output end of the control sub-circuit is connected to the driving sub-circuit
  • the driving sub-circuit is connected to the inverter sub-circuit
  • the inverter sub-circuit is connected to the capacitor array
  • the capacitor array is connected to the energy-transmitting coil array.
  • the one or more capacitive sensing coils are separately provided or shared with the energy transmitting coils.
  • a receiving end positioning method in an array type wireless power transmission system includes:
  • the energy transmitting coil is determined to be an energy transmitting coil in which a receiving end is placed;
  • the plurality of energy transmitting coils are polled to determine an energy transmitting coil in which the receiving end is placed.
  • determining, according to the change in the capacitance value of the one or more capacitive induction coils, determining the capacitive induction coil in which the receiving end is placed includes:
  • polling the plurality of energy transmitting coils to determine that the energy transmitting coils disposed near the receiving end comprises: sequentially driving the determined a plurality of energy transmitting coils corresponding to the capacitive induction coil;
  • An energy transmitting coil having a maximum current or voltage change is found, and the energy transmitting coil is determined to be an energy transmitting coil in which a receiving end is placed.
  • the one or more capacitive sensing coils are separately provided or shared with the energy transmitting coils.
  • the method further includes: identifying whether the receiving end is a legal receiving end, and if so, starting an energy transmitting coil in which the receiving end is placed, and transmitting to the legal receiving end Energy; otherwise, an alarm to give a foreign object prompt.
  • the alarm for issuing the foreign object prompt includes: determining whether the foreign object has been removed, and if so, entering the system standby; otherwise, issuing an alarm for the foreign object.
  • An array type wireless power transmission system includes one or more capacitive induction coils for sensing proximity of a receiving end and a capacitive sensing positioning circuit for determining a capacitive induction coil with a receiving end disposed nearby
  • the initial positioning of the receiving end can be realized by one or more capacitive induction coils and a capacitive sensing positioning circuit.
  • the initial positioning of the receiving end and the polling positioning method of the coil reduce the complexity of the positioning method of the polling positioning method, reduce the transmission of invalid energy to the outside, and easily pass the electromagnetic radiation test.
  • FIG. 1 is a system block diagram of an array type wireless power transmitting system of the present invention
  • FIG. 2 is a schematic diagram of a system of an array type wireless power transmitting system of the present invention
  • FIG. 3 is a block diagram of another system of an array type wireless power transmitting system of the present invention.
  • FIG. 4 is a schematic diagram of a system in which a capacitive induction coil and an energy emission coil are separately disposed in an array type wireless power transmission system according to the present invention
  • FIG. 5 is a schematic diagram of a system in which a capacitive induction coil and an energy emission coil are time-shared in an array type wireless power transmission system according to the present invention
  • Embodiment 6 is a flow chart of Embodiment 1 of a method for locating a receiving end in an array type wireless power transmitting system according to the present invention
  • Embodiment 7 is a flowchart of Embodiment 2 of a method for locating a receiving end in an array type wireless power transmitting system according to the present invention
  • Embodiment 8 is a flowchart of Embodiment 3 of a receiving end positioning method in an array type wireless power transmitting system according to the present invention.
  • FIG. 9 is a flow chart of Embodiment 4 of a receiving end positioning method in an array type wireless power transmitting system according to the present invention.
  • an array type wireless power transmission system includes:
  • One or more capacitive induction coils for sensing the proximity of the receiving end, and when the receiving end is close to the one or more capacitive sensing coils, the capacitance value of the one or more capacitive sensing coils changes, Wherein each capacitive induction coil corresponds to one or more energy transmitting coils;
  • the capacitive sensing positioning circuit is configured to determine a capacitive sensing coil in which a receiving end is placed, wherein an input end of the capacitive sensing positioning circuit is connected to the one or more capacitive sensing coils, and an output end of the capacitive sensing positioning circuit is connected to the energy emitting circuit.
  • the capacitive sensing positioning circuit includes: a capacitance collecting sub-circuit, configured to collect a capacitance value of the one or more capacitive sensing coils and send the capacitance value to a capacitive sensing positioning control sub-circuit, and the capacitance collecting sub-circuit and the one Or a plurality of capacitive sensing coils connected; a capacitive sensing positioning control sub-circuit, configured to receive and store a capacitance value of one or more capacitive sensing coils sent by the capacitance collecting sub-circuit and according to the one or more capacitive sensing coils The capacitance value changes to determine a capacitive induction coil in which a receiving end is placed.
  • the input end of the capacitive sensing positioning control sub-circuit is connected to the capacitance collecting sub-circuit, and the output end of the capacitive sensing positioning control sub-circuit is connected to the energy transmitting circuit.
  • FIG. 2 is a schematic diagram of a system of an array type wireless power transmission system. From Fig. 2, it can be clearly seen that the capacitance collecting sub-circuit is connected to two capacitive induction coils, each of which corresponds to five energy transmitting coils. Capacitive induction coils are placed on the array charging plane. The number and layout of the capacitor sensing coils are determined according to the actual conditions of the product.
  • the capacitive induction coil can also be in the form of a sensing line, an inductive disc, etc., and the positional relationship between the sensing line, the sensing disc and the energy transmitting coil is predetermined.
  • the energy transmitting coil near the sensing disk 1 is an energy transmitting coil 1, 2, 3, and the capacitive sensing positioning control sub-circuit determines that there is a receiving end near the sensing disk 1 according to the change of the capacitance value of the sensing disk 1, and the sensing disk 1 and the energy By transmitting the corresponding relationship of the coils 1, 2, and 3, it can be determined that there are receiving ends near the energy transmitting coils 1, 2, and 3.
  • An array type wireless power transmission system includes one or more capacitive induction coils for sensing proximity of a receiving end and a capacitive sensing positioning circuit for determining a capacitive induction coil with a receiving end disposed therein, by one or more Capacitive induction coil and capacitive sensing positioning circuit can realize receiving end Initial positioning.
  • the initial positioning of the receiving end and the polling positioning method of the coil reduce the complexity of the positioning method of the polling positioning method, reduce the transmission of invalid energy to the outside, and easily pass the electromagnetic radiation test.
  • an array type wireless power transmission system includes:
  • One or more capacitive induction coils for sensing the proximity of the receiving end, and when the receiving end is close to the one or more capacitive sensing coils, the capacitance values of the one or more capacitive sensing coils are changed, wherein each capacitive sensing The coil corresponds to one or more energy transmitting coils;
  • the capacitive sensing positioning circuit is configured to determine a capacitive sensing coil in which a receiving end is placed, wherein an input end of the capacitive sensing positioning circuit is connected to the one or more capacitive sensing coils, and an output end of the capacitive sensing positioning circuit is connected to the energy emitting circuit.
  • the capacitive sensing positioning circuit includes: a capacitance collecting sub-circuit, configured to collect a capacitance value of the one or more capacitive sensing coils and send the capacitance value to a capacitive sensing positioning control sub-circuit, and the capacitance collecting sub-circuit and the one Or a plurality of capacitive sensing coils connected; a capacitive sensing positioning control sub-circuit, configured to receive and store a capacitance value of one or more capacitive sensing coils sent by the capacitance collecting sub-circuit and according to the one or more capacitive sensing coils The capacitance value changes to determine a capacitive induction coil in which a receiving end is placed.
  • the input end of the capacitive sensing positioning control sub-circuit is connected to the capacitance collecting sub-circuit, and the output end of the capacitive sensing positioning control sub-circuit is connected to the energy transmitting circuit.
  • An energy emitting circuit includes: a control sub-circuit, a driving sub-circuit, an inverter sub-circuit, a capacitor array, and an energy transmitting coil array, wherein an input end of the control sub-circuit is connected to an output end of the capacitive sensing positioning sub-circuit, and is controlled The output of the sub-circuit is connected to the driving sub-circuit, the driving sub-circuit is connected to the inverter sub-circuit, the inverter sub-circuit is connected to the capacitor array, and the capacitor array is connected to the energy-transmitting coil array.
  • FIG. 4 is a schematic diagram of a system in which a capacitive induction coil and an energy transmitting coil of an array type wireless power transmitting system are separately disposed. From Fig. 4, it can be clearly seen that the capacitance collecting sub-circuit is connected to two capacitive induction coils, each of which corresponds to five energy transmitting coils, and the energy transmitting coil is connected to the capacitor array.
  • the capacitive sensing circuit When the capacitive induction coil and the energy transmitting coil are separately set, if there is concern about the energy transmission, the capacitive sensing circuit will have energy induction, resulting in energy loss and coil heating, which can be added between the capacitance collecting sub-circuit and one or more capacitive sensing coils.
  • a switch controlled by the control sub-circuit of the energy transmitting circuit can disconnect the connection circuit of the capacitor collecting sub-circuit and one or more capacitive sensing coils during energy transmission.
  • FIG. 5 is a schematic diagram of the system when the capacitive induction coil and the energy transmitting coil are time-shared.
  • One or more capacitive induction coils are shared with the energy transmitting coil, and the control sub-circuit controls the switching circuit to be connected to the capacitance collecting sub-circuit.
  • the coil is used as a capacitive sensing coil to realize initial positioning of the receiving end;
  • the control sub-circuit controls the switching circuit to be connected to the capacitor array to achieve precise positioning and energy transmission to the receiving end.
  • the use of one or more capacitive induction coils in a time sharing manner with the energy transmitting coils can save system components, reduce costs, and reduce the difficulty of layout of the coil portion.
  • An array type wireless power transmission system includes one or more capacitive induction coils for sensing proximity of a receiving end and a capacitive sensing positioning circuit for determining a capacitive induction coil disposed at a receiving end, by one or more A capacitive induction coil and a capacitive sensing positioning circuit can realize the initial positioning of the receiving end.
  • the initial positioning of the receiving end and the polling positioning method of the coil reduce the complexity of the polling positioning quorum mode, reduce the transmission of invalid energy to the outside, and easily pass the electromagnetic radiation test.
  • a method for positioning a receiving end in an array type wireless power transmitting system includes: Sl, determining a nearby connection according to a change in a capacitance value of the one or more capacitive sensing coils a capacitive induction coil at the end;
  • the determined capacitive induction coil corresponds to an energy transmitting coil, determine the energy transmitting coil as an energy transmitting coil with a receiving end nearby;
  • the determined capacitive induction coil corresponds to the plurality of energy transmitting coils, poll the plurality of energy transmitting coils to determine an energy transmitting coil in which the receiving end is placed.
  • the method for positioning a receiving end in an array type wireless power transmitting system comprises: determining, according to a change in a capacitance value of the one or more capacitive sensing coils, initially determining a capacitive sensing coil in which a receiving end is placed; The corresponding relationship between the induction coil and the energy transmitting coil accurately determines the energy transmitting coil in which the receiving end is placed.
  • the approximate position of the receiving end is obtained by the initial positioning, which reduces the complexity of the positioning method of the polling positioning method (the precise positioning method), reduces the invalid energy transmitted externally, and easily passes the electromagnetic radiation test.
  • the initial positioning in the receiving end positioning method in the array type wireless power transmitting system that is, the method in the first embodiment of the method S1 includes:
  • step S10 when the receiving end is close to the one or more capacitive sensing coils, the capacitance value of the one or more capacitive sensing coils changes, and the capacitance collecting sub-circuit periodically collects the one or more capacitive sensing
  • the capacitance value of the coil is sent to the capacitive sensing positioning control sub-circuit.
  • the capacitive sensing positioning control sub-circuit mainly has the following functions: 1. Receiving and storing the capacitance value of one or more capacitive sensing coils sent by the capacitance collecting sub-circuit; 2.
  • the capacitive sensing positioning control sub-circuit will have one or more The current capacitance value of the capacitive induction coil is compared with the capacitance value of the corresponding one or more capacitance induction coils previously stored, and the capacitance change value of the one or more capacitance induction coils is determined; 3. determining one or more capacitors Whether the capacitance change value of the induction coil is greater than a predetermined threshold, and if so, The capacitive induction coil that determines that the capacitance change value is greater than the predetermined threshold is a capacitive induction coil in which the receiving end is placed; otherwise, the timing detection and storage of the capacitance values of the one or more capacitive induction coils are continued.
  • the threshold is obtained according to the experimental parameters such as the position and distance of the actual transmitting end and the receiving end.
  • the threshold setting requirement cannot be too large, so that the receiving end cannot be perceived or placed too small to avoid misjudgment. . 4.
  • An energy transmitting coil corresponding to the capacitive sensing coil of the receiving end is placed nearby, and energy is transmitted to the receiving end.
  • step S11 For details of step S11, refer to the detailed description of step S10 above, and details are not described herein.
  • step S12 determining whether the capacitance change value of the one or more capacitive induction coils is greater than a predetermined threshold, and if so, executing step S120; otherwise, returning to step S10;
  • step S12 For details of step S12, refer to the detailed description of step S10 above, and details are not described herein.
  • the capacitive induction coil that determines that the capacitance change value is greater than a predetermined threshold is a capacitive induction coil with a receiving end disposed nearby.
  • the method for positioning a receiving end in an array type wireless power transmitting system comprises: determining, according to a change in a capacitance value of the one or more capacitive sensing coils, initially determining a capacitive sensing coil in which a receiving end is placed; The corresponding relationship between the induction coil and the energy transmitting coil accurately determines the energy transmitting coil in which the receiving end is placed.
  • the approximate position of the receiving end is obtained by the initial positioning, which reduces the complexity of the positioning method of the polling positioning method (the precise positioning method), reduces the invalid energy transmitted externally, and easily passes the electromagnetic radiation test.
  • the receiving end positioning method includes: a capacitance value of the coil;
  • step S22 The detailed steps of the coil are the details of step S22 in the first embodiment of the method.
  • the method for positioning a receiving end in an array type wireless power transmitting system comprises: determining, according to a change in a capacitance value of the one or more capacitive sensing coils, initially determining a capacitive sensing coil in which a receiving end is placed; The corresponding relationship between the induction coil and the energy transmitting coil accurately determines the energy transmitting coil in which the receiving end is placed.
  • the approximate position of the receiving end is obtained by the initial positioning, which reduces the complexity of the positioning method of the polling positioning method (the precise positioning method), reduces the invalid energy transmitted externally, and easily passes the electromagnetic radiation test.
  • a method for positioning a receiving end in an array type wireless power transmitting system includes:
  • step 503 determining whether to wake up standby, if yes, executing step S1; otherwise, returning to step S02; Sl, determining a capacitive induction coil in which a receiving end is placed according to a change in capacitance of the one or more capacitive induction coils;
  • the determined capacitive induction coil corresponds to an energy transmitting coil, determine the energy transmitting coil as an energy transmitting coil with a receiving end nearby;
  • the determined capacitive induction coil corresponds to multiple energy transmitting coils, poll the plurality of energy transmitting coils to determine an energy transmitting coil in which a receiving end is placed nearby;
  • step S30 after determining that the energy transmitting coil of the receiving end is placed nearby, identifying whether the receiving end is a legal receiving end, and if yes, executing step S301; otherwise, executing step S300;
  • S301 Start an energy transmitting coil with a receiving end disposed nearby, and transmit the energy to the legal receiving end.
  • step S300 an alarm for issuing a foreign object prompt
  • step S40 after step S300, determine whether the foreign object is removed, and if so, return to step S02; otherwise, return to step S300;
  • the array type wireless power transmission system can also determine whether the foreign object is removed, and can detect whether the foreign object is removed by detecting the current voltage variation of the energy transmitting coil, or can be judged by the change of the capacitance value of the capacitance sensing coil. Whether the foreign matter is removed or not, when the capacitance value of the capacitance induction coil is returned to the value before the step S1, it can be judged that the foreign matter is removed.
  • step S50 After step S301, it is determined whether the energy transmission is finished. If yes, the process returns to step S02; otherwise, the process returns to step S301.
  • step S50 it is judged whether the energy transmission is finished. If it is finished, the energy transmission coil is stopped, the energy is stopped to be transmitted to the receiving end, and the system enters the standby state; if not, the energy transmitting coil is continuously activated, and the energy is transmitted to the receiving end. .
  • the method for positioning a receiving end in an array type wireless power transmitting system comprises: determining, according to a change in a capacitance value of the one or more capacitive sensing coils, initially determining a capacitive sensing coil in which a receiving end is placed; The corresponding relationship between the induction coil and the energy transmitting coil accurately determines the energy transmitting coil in which the receiving end is placed.
  • the approximate position of the receiving end is obtained by the initial positioning, which reduces the complexity of the positioning method of the polling positioning method (the precise positioning method), reduces the invalid energy transmitted externally, and easily passes the electromagnetic radiation test.

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Abstract

提供了一种阵列式无线电力发射系统及其接收端定位方法。该阵列式无线电力发射系统包括用于感应接收端靠近的一个或多个电容感应线圈和用于确定附近放置有接收端的电容感应线圈的电容感应定位电路，通过一个或多个电容感应线圈和电容感应定位电路可实现接收端的初步定位。该定位方法降低了轮询定位法定位方式的复杂性，减少了对外发送无效能量，容易通过电磁辐射测试。

Description

说 明 书 阵列式无线电力发射系统及其接收端定位方法 技术领域 本发明属于无线充电领域， 尤其涉及一种阵列式无线电力发射系统及其接 收端定位方法。 背景技术 随着电子技术的快速发展， 各种电子设备迅速进入到人们的生活。 时下， 人们拥有好几种电子设备已变得非常普遍， 比如一个人可以同时拥有好几部手 机、 IPAD、 MP4等电子设备。 这些电子设备给人们的生活带来极大便利和乐趣 的同时， 随之也产生一系列的麻烦问题， 比如这些电子设备的充电问题。 这些 电子设备的充电接口一般都是不同的， 这就意味着， 人们拥有几个电子设备就 需要几种不同的充电设备， 目前绝大多数充电设备是通过有线方式连接到电源 的， 由此， 可以想象， 使用目前的充电设备会造成室内环境的杂乱。 为此， 无线充电系统应运产生， 无线充电系统包括发射端和接收端， 发射 端即为无线充电设备， 接收端即为待充电的各种电子设备。 时下， 为了扩大接 收端在发射端放置的自由度， 提高用户体验， 或者满足用户多个接收端同时自 由放置充电的需求， 阵列式无线充电系统是一种很好地解决方式， 这种阵列式 无线充电系统的发射端有一个线圈阵列， 该线圈阵列由多个线圈组成。 将接收 端放在发射端上面进行充电时， 为了保持能量传输的高效性， 降低能量浪费及 电磁污染， 并不是所有的线圈都会进行电能的传输。 具体哪些线圈进行电能的 传输， 首先要进行接收端的定位， 接收端定位后， 由接收端附近的一个或多个 线圈进行电能的传输。 目前阵列式无线充电系统对接收端的定位一般采用线圈 的轮询方式， 即发射端线圈阵列中的每个线圈轮流发送电能， 通过检测发射端 线圈阵列中的每个线圈的电压电流变化或者根据接收端返回的通讯信息进行接 收端的定位。
然而， 采用轮询方式对接收端进行定位时， 需要阵列式无线充电系统发射 端在多个线圈上轮流发送电能， 具有能量损失， 而且对多个线圈的选择及控制 切换较为复杂。 很多时候， 需要把所有的线圈都轮询一遍后才能定位到接收端， 在这个过程中， 花费时间长， 并发送了无效的电能， 造成电能损失之余还带来 电磁辐射， 可见轮询定位法不是一种很优的接收端定位方法。
发明内容
鉴于此， 为了解决阵列式无线充电系统轮询定位法定位方式复杂、 对外发 送无效电能及带来电磁辐射的问题， 本发明提供一种阵列式无线电力发射系统 及其接收端定位方法。
本发明技术方案如下：
一种阵列式无线电力发射系统， 包括：
一个或多个电容感应线圈， 用于感应接收端的靠近， 当接收端靠近所述一 个或多个电容感应线圈时， 所述一个或多个电容感应线圈的电容值发生变化， 其中每个电容感应线圈对应于一个或多个能量发射线圈；
电容感应定位电路， 用于确定附近放置有接收端的电容感应线圈， 其中电 容感应定位电路的输入端与所述一个或多个电容感应线圈连接， 电容感应定位 电路的输出端与能量发射电路连接。
进一歩地， 所述电容感应定位电路包括：
电容采集子电路， 用于采集所述一个或多个电容感应线圈的电容值并将该 电容值发送给电容感应定位控制子电路， 其中， 电容采集子电路与所述一个或 多个电容感应线圈连接； 电容感应定位控制子电路， 用于接收并存储所述电容采集子电路发送的一 个或多个电容感应线圈的电容值并根据所述一个或多个电容感应线圈的电容值 变化确定附近放置有接收端的电容感应线圈， 其中， 电容感应定位控制子电路 的输入端与所述电容采集子电路连接， 电容感应定位控制子电路的输出端与能 量发射电路连接。
进一歩地， 所述能量发射电路包括控制子电路、 驱动子电路、 逆变子电路、 电容阵列和能量发射线圈阵列， 控制子电路的输入端与所述电容感应定位控制 子电路的输出端连接、 控制子电路的输出端与驱动子电路连接、 驱动子电路与 逆变子电路连接、 逆变子电路与电容阵列连接、 电容阵列与能量发射线圈阵列 连接。
进一歩地， 所述一个或多个电容感应线圈单独设置或与所述能量发射线圈 分时共用。
一种阵列式无线电力发射系统中的接收端定位方法， 包括：
根据所述一个或多个电容感应线圈的电容值变化， 确定附近放置有接收端 的电容感应线圈；
若所确定的电容感应线圈对应于一个能量发射线圈， 则将该能量发射线圈 确定为附近放置有接收端的能量发射线圈；
若所确定的电容感应线圈对应于多个能量发射线圈， 则对该多个能量发射 线圈进行轮询， 以确定附近放置有接收端的能量发射线圈。
进一歩地， 所述根据所述一个或多个电容感应线圈的电容值变化， 确定附 近放置有接收端的电容感应线圈包括：
510、 定时检测并存储所述一个或多个电容感应线圈的电容值；
511、 将检测到的所述一个或多个电容感应线圈的当前电容值与之前存储的 相应的所述一个或多个电容感应线圈的电容值一一比较， 确定所述一个或多个 电容感应线圈的电容变化值；
S12、 判断所述一个或多个电容感应线圈的电容变化值是否大于预定阈值， 如果是， 则判定电容变化值大于预定阈值的电容感应线圈为附近放置有接收端 的电容感应线圈； 否则， 返回歩骤 S10。
进一歩地， 所述若所确定的电容感应线圈对应于多个能量发射线圈， 则对 该多个能量发射线圈进行轮询， 以确定附近放置有接收端的能量发射线圈包括: 依次驱动所确定的电容感应线圈对应的多个能量发射线圈；
检测所述多个能量发射线圈的电流或电压变化；
找出具有最大电流或电压变化的能量发射线圈， 将该能量发射线圈确定为 附近放置有接收端的能量发射线圈。
进一歩地， 所述一个或多个电容感应线圈单独设置或与所述能量发射线圈 分时共用。
进一歩地， 所述确定附近放置有接收端的能量发射线圈之后， 还包括： 识别接收端是否为合法接收端， 如果是， 则启动附近放置有接收端的能量 发射线圈， 对所述合法接收端传输能量； 否则， 发出异物提示的警报。
进一歩地， 所述发出异物提示的警报之后还包括： 判断异物是否被移走， 如果是， 则进入系统待机； 否则， 发出异物提示的警报。
本发明有益效果： 本发明所述的一种阵列式无线电力发射系统包括用于感 应接收端的靠近的一个或多个电容感应线圈和用于确定附近放置有接收端的电 容感应线圈的电容感应定位电路， 通过一个或多个电容感应线圈和电容感应定 位电路可实现接收端的初歩定位。 接收端的初歩定位配合线圈的轮询定位法， 降低了轮询定位法定位方式的复杂性， 减少了对外发送无效能量， 容易通过电 磁辐射测试。 附图说明
图 1是本发明一种阵列式无线电力发射系统的一系统框图；
图 2是本发明一种阵列式无线电力发射系统的一系统示意图；
图 3是本发明一种阵列式无线电力发射系统的另一系统框图；
图 4是本发明一种阵列式无线电力发射系统中电容感应线圈与能量发射线 圈单独设置时的系统示意图；
图 5 是本发明一种阵列式无线电力发射系统中电容感应线圈与能量发射线 圈分时共用时的系统示意图；
图 6是本发明一种阵列式无线电力发射系统中的接收端定位方法实施例一 的流程图；
图 7 是本发明一种阵列式无线电力发射系统中的接收端定位方法实施例二 的流程图；
图 8是本发明一种阵列式无线电力发射系统中的接收端定位方法实施例三 的流程图；
图 9是本发明一种阵列式无线电力发射系统中的接收端定位方法实施例四 的流程图。
具体实施方式
为了更清楚地说明本发明的技术方案， 下面结合附图对本发明做进一歩详 细的说明。
系统实施例一
参见图 1， 一种阵列式无线电力发射系统包括：
一个或多个电容感应线圈， 用于感应接收端的靠近， 当接收端靠近所述一 个或多个电容感应线圈时， 所述一个或多个电容感应线圈的电容值发生变化， 其中每个电容感应线圈对应于一个或多个能量发射线圈；
电容感应定位电路， 用于确定附近放置有接收端的电容感应线圈， 其中电 容感应定位电路的输入端与所述一个或多个电容感应线圈连接， 电容感应定位 电路的输出端与能量发射电路连接。 所述电容感应定位电路包括： 电容采集子 电路， 用于采集所述一个或多个电容感应线圈的电容值并将该电容值发送给电 容感应定位控制子电路， 电容采集子电路与所述一个或多个电容感应线圈连接； 电容感应定位控制子电路， 用于接收并存储所述电容采集子电路发送的一个或 多个电容感应线圈的电容值并根据所述一个或多个电容感应线圈的电容值变化 确定附近放置有接收端的电容感应线圈， 电容感应定位控制子电路的输入端与 所述电容采集子电路连接， 电容感应定位控制子电路的输出端与能量发射电路 连接。
参见图 2，图 2为一种阵列式无线电力发射系统的一系统示意图。从图 2中， 可清楚到看到电容采集子电路与两个电容感应线圈连接， 每个电容感应线圈对 应于五个能量发射线圈。 在阵列式充电平面上设置电容感应线圈， 电容感应线 圈的数目和布局要根据产品的实际情况来确定。
电容感应线圈还可以为感应线、 感应盘等其他形式， 感应线、 感应盘与能 量发射线圈的位置对应关系是事先定好的。 比如感应盘 1 附近的能量发射线圈 为能量发射线圈 1、 2、 3 ， 电容感应定位控制子电路根据感应盘 1的电容值有 变化来判定感应盘 1附近有接收端， 由感应盘 1与能量发射线圈 1、 2、 3的对 应关系， 即可判断出能量发射线圈 1、 2、 3附近有接收端。
本发明所述的一种阵列式无线电力发射系统包括用于感应接收端靠近的一 个或多个电容感应线圈和用于确定附近放置有接收端的电容感应线圈的电容感 应定位电路， 通过一个或多个电容感应线圈和电容感应定位电路可实现接收端 的初歩定位。 接收端的初歩定位配合线圈的轮询定位法， 降低了轮询定位法定 位方式的复杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。
系统实施例二
参见图 3， 一种阵列式无线电力发射系统包括：
一个或多个电容感应线圈， 用于感应接收端的靠近， 当接收端靠近所述一 个或多个电容感应线圈时， 所述一个或多个电容感应线圈的电容值发生变化， 其中每个电容感应线圈对应于一个或多个能量发射线圈；
电容感应定位电路， 用于确定附近放置有接收端的电容感应线圈， 其中电 容感应定位电路的输入端与所述一个或多个电容感应线圈连接， 电容感应定位 电路的输出端与能量发射电路连接。 所述电容感应定位电路包括： 电容采集子 电路， 用于采集所述一个或多个电容感应线圈的电容值并将该电容值发送给电 容感应定位控制子电路， 电容采集子电路与所述一个或多个电容感应线圈连接； 电容感应定位控制子电路， 用于接收并存储所述电容采集子电路发送的一个或 多个电容感应线圈的电容值并根据所述一个或多个电容感应线圈的电容值变化 确定附近放置有接收端的电容感应线圈， 电容感应定位控制子电路的输入端与 所述电容采集子电路连接， 电容感应定位控制子电路的输出端与能量发射电路 连接。
能量发射电路， 能量发射电路包括控制子电路、 驱动子电路、 逆变子电路、 电容阵列和能量发射线圈阵列， 控制子电路的输入端与所述电容感应定位控制 子电路的输出端连接、 控制子电路的输出端与驱动子电路连接、 驱动子电路与 逆变子电路连接、 逆变子电路与电容阵列连接、 电容阵列与能量发射线圈阵列 连接。
一个或多个电容感应线圈可单独设置， 也可与所述能量发射线圈分时共用。 参见图 4，图 4为一种阵列式无线电力发射系统电容感应线圈与能量发射线 圈单独设置时的系统示意图。 从图 4 中， 可清楚到看到电容采集子电路与两个 电容感应线圈连接， 每个电容感应线圈对应于五个能量发射线圈， 能量发射线 圈与电容阵列连接。 电容感应线圈与能量发射线圈单独设置时， 如果担心能量 传输时， 电容感应回路会有能量感应进来， 造成能量损失和线圈发热， 可以在 电容采集子电路与一个或多个电容感应线圈之间增加一个由能量发射电路的控 制子电路控制的开关， 在能量传输时， 可以断开电容采集子电路与一个或多个 电容感应线圈的连接回路。
参见图 5， 图 5为电容感应线圈与能量发射线圈分时共用时的系统示意图。 一个或多个电容感应线圈与所述能量发射线圈分时共用， 控制子电路控制切换 电路连接到电容采集子电路， 此时的线圈作为电容感应线圈使用， 实现接收端 的初歩定位； 到需要精确定位接收端的位置及对接收端传输能量时， 控制子电 路控制切换电路连接到电容阵列， 实现对接收端的精确定位及能量传输。 采用 一个或多个电容感应线圈与所述能量发射线圈分时共用方式， 可以节省系统的 组件， 降低成本， 并能降低线圈部分布局的难度。
本发明所述的一种阵列式无线电力发射系统包括用于感应接收端的靠近的 一个或多个电容感应线圈和用于确定附近放置有接收端电容感应线圈的电容感 应定位电路， 通过一个或多个电容感应线圈和电容感应定位电路可实现接收端 的初歩定位。 接收端的初歩定位配合线圈的轮询定位法， 降低了轮询定位法定 位方式的复杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。
方法实施例一
参见图 6， 一种阵列式无线电力发射系统中的接收端定位方法， 包括： Sl、 根据所述一个或多个电容感应线圈的电容值变化， 确定附近放置有接 收端的电容感应线圈；
521、 若所确定的电容感应线圈对应于一个能量发射线圈， 则将该能量发射 线圈确定为附近放置有接收端的能量发射线圈；
522、 若所确定的电容感应线圈对应于多个能量发射线圈， 则对该多个能量 发射线圈进行轮询， 以确定附近放置有接收端的能量发射线圈。
本发明所述的一种阵列式无线电力发射系统中的接收端定位方法， 包括根 据所述一个或多个电容感应线圈的电容值变化， 初歩确定附近放置有接收端的 电容感应线圈； 再根据电容感应线圈与能量发射线圈的对应关系， 精确确定附 近放置有接收端的能量发射线圈。 在精确定位之前， 通过初歩定位获得接收端 所在的大概位置， 降低了即轮询定位法 （精确定位的具体方式） 定位方式的复 杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。
方法实施例二
参见图 7， 一种阵列式无线电力发射系统中的接收端定位方法中的初歩定 位： 即方法实施例一中歩骤 S1包括：
S10、 定时检测并存储所述一个或多个电容感应线圈的电容值；
在歩骤 S10中， 当接收端靠近所述一个或多个电容感应线圈时， 所述一个或 多个电容感应线圈的电容值发生变化， 电容采集子电路定时采集所述一个或多 个电容感应线圈的电容值并将该电容值发送给电容感应定位控制子电路。 电容 感应定位控制子电路主要具备以下功能： 1、 接收并存储电容采集子电路发送的 一个或多个电容感应线圈的电容值； 2、 每存储一次， 电容感应定位控制子电路 将一个或多个电容感应线圈的当前电容值与之前存储的相应的一个或多个电容 感应线圈的电容值一一比较， 确定所述一个或多个电容感应线圈的电容变化值; 3、 判断一个或多个电容感应线圈的电容变化值是否大于预定阈值， 如果是， 则 判定电容变化值大于预定阈值的电容感应线圈为附近放置有接收端的电容感应 线圈； 否则， 继续定时检测并存储一个或多个电容感应线圈的电容值。 其中， 阈值是根据实际发射端和接收端放置的位置、 距离等相关参数实验得出来的， 阈值的设置要求不能太大， 以免接收端放置时不能被感知， 也不能太小， 以免 造成误判。 4、 根据电容感应线圈与能量发射线圈的对应关系， 找到附近放置有 接收端的电容感应线圈对应的能量发射线圈， 将该能量发射线圈发送给能量发 射电路的控制子电路， 以使能量发射电路驱动附近放置有接收端的电容感应线 圈对应的能量发射线圈， 对接收端传输能量。
Sll、 将检测到的所述一个或多个电容感应线圈的当前电容值与之前存储的 相应的所述一个或多个电容感应线圈的电容值一一比较， 确定所述一个或多个 电容感应线圈的电容变化值；
歩骤 S11的详述， 参见上述歩骤 S10详述内容， 此处不作赘述。
S12、 判断所述一个或多个电容感应线圈的电容变化值是否大于预定阈值， 如果是， 则执行歩骤 S120; 否则， 返回歩骤 S10;
歩骤 S12的详述， 参见上述歩骤 S10详述内容， 此处不作赘述。
S120、 判定电容变化值大于预定阈值的电容感应线圈为附近放置有接收端 的电容感应线圈。
本发明所述的一种阵列式无线电力发射系统中的接收端定位方法， 包括根 据所述一个或多个电容感应线圈的电容值变化， 初歩确定附近放置有接收端的 电容感应线圈； 再根据电容感应线圈与能量发射线圈的对应关系， 精确确定附 近放置有接收端的能量发射线圈。 在精确定位之前， 通过初歩定位获得接收端 所在的大概位置， 降低了即轮询定位法 （精确定位的具体方式） 定位方式的复 杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。 收端定位方法， 包括： 线圈的电容值；
的当前电容值与之前存储的 比较， 确定所述一个或多个 变化值是否大于预定阈值， 应线圈为附近放置有接收端 统中的接收端的初歩定位， 发射线圈， 则将该能量发射 对应关系， 精确定位接收端 量发射线圈， 则依次驱动所
线圈的详细歩骤， 即方法实施例一中歩骤 S22的具体内容。
本发明所述的一种阵列式无线电力发射系统中的接收端定位方法， 包括根 据所述一个或多个电容感应线圈的电容值变化， 初歩确定附近放置有接收端的 电容感应线圈； 再根据电容感应线圈与能量发射线圈的对应关系， 精确确定附 近放置有接收端的能量发射线圈。 在精确定位之前， 通过初歩定位获得接收端 所在的大概位置， 降低了即轮询定位法 （精确定位的具体方式） 定位方式的复 杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。
方法实施例四
参见图 9， 一种阵列式无线电力发射系统中的接收端定位方法， 包括：
501、 系统初始化；
502、 系统待机；
503、 判断是否待机唤醒， 如果是， 则执行歩骤 S1 ; 否则， 返回歩骤 S02; Sl、 根据所述一个或多个电容感应线圈的电容值变化， 确定附近放置有接 收端的电容感应线圈；
521、 若所确定的电容感应线圈对应于一个能量发射线圈， 则将该能量发射 线圈确定为附近放置有接收端的能量发射线圈；
522、 若所确定的电容感应线圈对应于多个能量发射线圈， 则对该多个能量 发射线圈进行轮询， 以确定附近放置有接收端的能量发射线圈；
S30、 在确定附近放置有接收端的能量发射线圈后， 识别接收端是否为合法 接收端， 如果是， 则执行歩骤 S301 ; 否则， 执行歩骤 S300;
S301、 启动附近放置有接收端的能量发射线圈， 对所述合法接收端传输能
S300、 发出异物提示的警报; S40、 歩骤 S300之后， 判断异物是否被移走， 如果是， 则返回歩骤 S02 ; 否则， 返回歩骤 S300;
歩骤 S40 中， 阵列式无线电力发射系统还可以判断异物是否被移走， 可以 通过检测能量发射线圈的电流电压变化来判断异物是否被移走， 也可以通过电 容感应线圈电容值的变化来判断异物是否被移走， 当电容感应线圈的电容值回 歩骤 S1之前的值时， 可判断为异物被移走。
S50、 歩骤 S301之后， 判断能量传输是否结束， 如果是， 则返回歩骤 S02 ; 否则返回歩骤 S301。
歩骤 S50 中， 判断能量传输是否结束， 如果结束， 则停止启动能量发射线 圈， 停止对接收端传输能量， 系统进入到待机状态； 如果没有结束， 则继续启 动能量发射线圈， 对接收端传输能量。
本发明所述的一种阵列式无线电力发射系统中的接收端定位方法， 包括根 据所述一个或多个电容感应线圈的电容值变化， 初歩确定附近放置有接收端的 电容感应线圈； 再根据电容感应线圈与能量发射线圈的对应关系， 精确确定附 近放置有接收端的能量发射线圈。 在精确定位之前， 通过初歩定位获得接收端 所在的大概位置， 降低了即轮询定位法 （精确定位的具体方式） 定位方式的复 杂性， 减少了对外发送无效能量， 容易通过电磁辐射测试。
以上结合具体实施例描述了本发明的技术原理。 这些描述只是为了解释本 发明的原理， 而不能以任何方式解释为对本发明保护范围的限制。 基于此处的 解释， 本领域的技术人员不需要付出创造性的劳动即可联想到本发明的其它具 体实施方式， 这些方式都将落入本发明的保护范围之内。

Claims

权 利 要 求 书
1、 一种阵列式无线电力发射系统， 其特征在于， 包括：
一个或多个电容感应线圈， 用于感应接收端的靠近， 当接收端靠近所述一 个或多个电容感应线圈时， 所述一个或多个电容感应线圈的电容值发生变化， 其中每个电容感应线圈对应于一个或多个能量发射线圈；
电容感应定位电路， 用于确定附近放置有接收端的电容感应线圈， 其中电 容感应定位电路的输入端与所述一个或多个电容感应线圈连接， 电容感应定位 电路的输出端与能量发射电路连接。
2、 根据权利要求 1所述的一种阵列式无线电力发射系统， 其特征在于， 所 述电容感应定位电路包括： 电容采集子电路， 用于采集所述一个或多个电容感应线圈的电容值并将该 电容值发送给电容感应定位控制子电路， 其中， 电容采集子电路与所述一个或 多个电容感应线圈连接； 电容感应定位控制子电路， 用于接收并存储所述电容采集子电路发送的一 个或多个电容感应线圈的电容值并根据所述一个或多个电容感应线圈的电容值 变化确定附近放置有接收端的电容感应线圈， 其中， 电容感应定位控制子电路 的输入端与所述电容采集子电路连接， 电容感应定位控制子电路的输出端与能 量发射电路连接。
3、 根据权利要求 1所述的一种阵列式无线电力发射系统， 其特征在于， 所 述能量发射电路包括控制子电路、 驱动子电路、 逆变子电路、 电容阵列和能量 发射线圈阵列， 控制子电路的输入端与所述电容感应定位控制子电路的输出端 连接、控制子电路的输出端与驱动子电路连接、驱动子电路与逆变子电路连接、 逆变子电路与电容阵列连接、 电容阵列与能量发射线圈阵列连接。
4、 根据权利要求 1所述的一种阵列式无线电力发射系统， 其特征在于， 所 述一个或多个电容感应线圈单独设置或与所述能量发射线圈分时共用。
5、 一种如权利要求 1 所述的阵列式无线电力发射系统中的接收端定位方 法， 其特征在于， 包括：
根据所述一个或多个电容感应线圈的电容值变化， 确定附近放置有接收端 的电容感应线圈；
若所确定的电容感应线圈对应于一个能量发射线圈， 则将该能量发射线圈 确定为附近放置有接收端的能量发射线圈；
若所确定的电容感应线圈对应于多个能量发射线圈， 则对该多个能量发射 线圈进行轮询， 以确定附近放置有接收端的能量发射线圈。
6、 如权利要求 5所述的接收端定位方法， 其特征在于， 所述根据所述一个 或多个电容感应线圈的电容值变化， 确定附近放置有接收端的电容感应线圈包 括：
510、 定时检测并存储所述一个或多个电容感应线圈的电容值；
511、 将检测到的所述一个或多个电容感应线圈的当前电容值与之前存储的 相应的所述一个或多个电容感应线圈的电容值一一比较， 确定所述一个或多个 电容感应线圈的电容变化值；
512、 判断所述一个或多个电容感应线圈的电容变化值是否大于预定阈值， 如果是， 则判定电容变化值大于预定阈值的电容感应线圈为附近放置有接收端 的电容感应线圈； 否则， 返回歩骤 S10。
7、 如权利要求 6所述的接收端定位方法， 其特征在于， 所述若所确定的电 容感应线圈对应于多个能量发射线圈， 则对该多个能量发射线圈进行轮询， 以 确定附近放置有接收端的能量发射线圈包括：
依次驱动所确定的电容感应线圈对应的多个能量发射线圈； 检测所述多个能量发射线圈的电流或电压变化；
找出具有最大电流或电压变化的能量发射线圈， 将该能量发射线圈确定为 附近放置有接收端的能量发射线圈。
8、 如权利要求 5所述的接收端定位方法， 其特征在于， 所述一个或多个电 容感应线圈单独设置或与所述能量发射线圈分时共用。
9、 如权利要求 5所述的接收端定位方法， 其特征在于， 所述确定附近放置 有接收端的能量发射线圈之后， 还包括：
识别接收端是否为合法接收端， 如果是， 则启动附近放置有接收端的能量 发射线圈， 对所述合法接收端传输能量； 否则， 发出异物提示的警报。
10、 如权利要求 9所述的接收端定位方法， 其特征在于， 所述发出异物提 示的警报之后还包括： 判断异物是否被移走， 如果是， 则进入系统待机； 否则， 发出异物提示的警报。
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