阅读说明：本技术 一种无线充电桩的控制装置及其控制方法 (Control device and control method of wireless charging pile ) 是由 王明来 张川龙 曲志华 于 2020-11-05 设计创作，主要内容包括：本发明涉及充电桩技术领域,尤其涉及一种无线充电桩的控制装置,包括：位置传感器分别设置于充电端模块和受电端模块,用于检测发射线圈和接收线圈的相对位置并形成一位置检测信号；受电端模块还包括：第一控制单元,连接位置传感器,用于接收位置传感器反馈的位置检测信号,并判断发射线圈和接收线圈的相对位置是否达到一预设范围；第一通信单元,与第一控制单元信号连接；充电端模块还包括：第二控制单元,连接一第二通信单元,第二通信单元与第一通信单元无线通信连接,用于使第一控制单元和第二控制单元通信。有益效果：实现电动汽车的受电端模块与无线充电桩自动进行对准、启动充电以及停止充电判断功能,提高充电效率、安全性。(The invention relates to the technical field of charging piles, in particular to a control device of a wireless charging pile, which comprises: the position sensors are respectively arranged on the charging end module and the receiving end module and are used for detecting the relative positions of the transmitting coil and the receiving coil and forming a position detection signal; the power receiving end module further comprises: the first control unit is connected with the position sensor and used for receiving a position detection signal fed back by the position sensor and judging whether the relative position of the transmitting coil and the receiving coil reaches a preset range or not; the first communication unit is in signal connection with the first control unit; the charging terminal module further includes: and the second control unit is connected with a second communication unit, and the second communication unit is in wireless communication connection with the first communication unit and is used for enabling the first control unit and the second control unit to communicate. Has the advantages that: the functions of automatically aligning, starting charging and stopping charging of the power receiving end module of the electric automobile and the wireless charging pile are achieved, and charging efficiency and safety are improved.)

1. A control device of a wireless charging pile comprises a charging end module and a receiving end module, wherein the charging end module comprises a transmitting coil, and the receiving end module comprises a receiving coil; it is characterized by also comprising:

the position sensors are respectively arranged on the charging end module and the receiving end module and are used for detecting the relative positions of the transmitting coil and the receiving coil and forming a position detection signal;

the power receiving end module further comprises:

the first control unit is connected with the position sensor and used for receiving the position detection signal fed back by the position sensor and judging whether the relative position of the transmitting coil and the receiving coil reaches a preset range or not;

the first communication unit is in signal connection with the first control unit;

the charging terminal module further includes:

and the second control unit is connected with a second communication unit, and the second communication unit is in wireless communication connection with the first communication unit and is used for enabling the first control unit and the second control unit to communicate.

2. The control device according to claim 1, wherein the first control unit specifically comprises:

a first control chip;

the first input end and the second input end of the amplifier are respectively connected with the receiving coil, and the output end of the amplifier is connected with the first input end of the first control chip and used for collecting the charging current of the receiving coil and transmitting the charging current to the first control chip after being amplified.

3. The control device according to claim 2, wherein the first control unit further includes:

the second input end of the first control chip is connected between the first resistor and the second resistor and is used for sampling the charging voltage of the receiving coil;

and the first capacitor is connected between the second input end of the first control chip and the grounding end and is used for filtering the voltage signal input by the first control chip.

4. The control device of claim 2, wherein the third input end of the first control chip is connected with the position sensor, and the position sensor is a hall sensor.

5. The control device according to claim 2, wherein the first control unit further comprises a plurality of indicator lights of different colors, respectively connected to the plurality of output terminals of the first control chip, for indicating the charging state of the power receiving terminal module.

6. The control device as claimed in claim 2, wherein the first control unit further comprises a restart button communicatively connected to the first control chip for controlling the first control chip to restart.

7. A control method for a wireless charging pile, which is applied to the control device according to any one of claims 1 to 6, comprising:

step S1, after the control device is powered on, the first control unit receives the position detection signal fed back by the position sensor, and determines whether the relative position of the transmitting coil and the receiving coil reaches the preset range according to the position detection signal:

if yes, go to step S2;

if not, returning to the step S1;

step S2, the first control unit detecting whether the first communication unit and the second communication unit establish a communication connection:

if yes, go to step S3;

if not, returning to the step S2;

step S3, the first control unit collects the induced current of the receiving coil, and determines whether the coupling degree between the receiving coil and the transmitting coil meets a preset standard:

if yes, starting a charging process of the power receiving end module;

if not, the process returns to the step S3.

8. The control method according to claim 7, wherein the charging process includes a small-current trial charging process, a constant-current charging process, and a constant-voltage charging process.

9. The control method according to claim 7, wherein the first control unit detects the battery voltage of the power receiving end module every preset time during the charging process, and stops charging when the battery voltage is abnormal.

10. The control method according to claim 9, characterized in that the preset time is 20 ms.

Technical Field

The invention relates to the technical field of charging piles, in particular to a control device and a control method of a wireless charging pile.

Background

With the gradual maturity of wireless charging technology, the application of the wireless charging technology in the field of electric vehicles also gradually becomes a focus of attention, and communication protocols such as QI for a charging process appear, but in the field of Automatic Guided Vehicles (AGVs), the application of wireless charging is different from common household appliance scenes, for example, the wireless charging pile has a large power, a higher requirement on automation degree, diversified types of charging batteries, different safety standards, and the like.

The wireless charging technology still has a great deal of problems in practical application, if charging efficiency is not high, the fail safe nature is relatively poor, interference factor is more, wireless charging stake degree of automation is not high enough in addition, need artificial judgement receiving terminal's receiving coil whether reach with fill the corresponding preset position of electric pile's transmitting coil, also can't in time report to the police or stop charging when charging the trouble or charging the completion.

Disclosure of Invention

In view of the above problems in the prior art, a control device and a control method for a wireless charging pile are provided.

The specific technical scheme is as follows:

the invention comprises a control device of a wireless charging pile, which comprises a charging end module and a receiving end module, wherein the charging end module comprises a transmitting coil, and the receiving end module comprises a receiving coil; further comprising:

the position sensors are respectively arranged on the charging end module and the receiving end module and are used for detecting the relative positions of the transmitting coil and the receiving coil and forming a position detection signal;

the power receiving end module further comprises:

the first control unit is connected with the position sensor and used for receiving the position detection signal fed back by the position sensor and judging whether the relative position of the transmitting coil and the receiving coil reaches a preset range or not;

the first communication unit is in signal connection with the first control unit;

the charging terminal module further includes:

and the second control unit is connected with a second communication unit, and the second communication unit is in wireless communication connection with the first communication unit and is used for enabling the first control unit and the second control unit to communicate.

Preferably, the first control unit specifically includes:

a first control chip;

the first input end and the second input end of the amplifier are respectively connected with the receiving coil, and the output end of the amplifier is connected with the first input end of the first control chip and used for collecting the charging current of the receiving coil and transmitting the charging current to the first control chip after being amplified.

Preferably, the first control unit further includes:

the second input end of the first control chip is connected between the first resistor and the second resistor and is used for sampling the charging voltage of the receiving coil;

and the first capacitor is connected between the second input end of the first control chip and the grounding end and is used for filtering the voltage signal input by the first control chip.

Preferably, the third input end of the first control chip is connected to the position sensor, and the position sensor is a hall sensor.

Preferably, the first control unit further includes a plurality of indicator lights with different colors, which are respectively connected to the plurality of output terminals of the first control chip, and are used for indicating the charging state of the power receiving terminal module.

Preferably, the first control unit further includes a restart key, communicatively connected to the first control chip, for controlling the restart of the first control chip.

The invention comprises a control method of a wireless charging pile, which is applied to any one of the control devices in the technical scheme and comprises the following steps:

step S1, after the control device is powered on, the first control unit receives the position detection signal fed back by the position sensor, and determines whether the relative position of the transmitting coil and the receiving coil reaches the preset range according to the position detection signal:

if yes, go to step S2;

if not, returning to the step S1;

step S2, the first control unit detecting whether the first communication unit and the second communication unit establish a communication connection:

if yes, go to step S3;

if not, returning to the step S2;

step S3, the first control unit collects the induced current of the receiving coil, and determines whether the coupling degree between the receiving coil and the transmitting coil meets a preset standard:

if yes, starting a charging process of the power receiving end module;

if not, the process returns to the step S3.

Preferably, the charging process includes a low-current trial charging process, a constant-current charging process and a constant-voltage charging process.

Preferably, in the charging process, the first control unit detects the battery voltage of the power receiving end module every other preset time, and stops charging when the battery voltage is abnormal.

Preferably, the preset time is 20 ms.

The technical scheme of the invention has the following advantages or beneficial effects: the control device and the control method of the wireless charging pile are provided, the functions of automatically aligning a receiving end module of an electric automobile with the wireless charging pile, starting charging and stopping charging are realized, the communication function between the receiving end module and the wireless charging pile is realized, so that a user can know the real-time charging state in time, and the charging efficiency and the safety of the charging process are further improved.

Drawings

Embodiments of the present invention will now be described more fully hereinafter with reference to the accompanying drawings. The drawings are, however, to be regarded as illustrative and explanatory only and are not restrictive of the scope of the invention.

FIG. 1 is a functional block diagram of a control device in an embodiment of the present invention;

FIG. 2 is a circuit diagram of a first control unit according to an embodiment of the present invention;

FIG. 3 is a flow chart of steps of a control method in an embodiment of the present invention;

fig. 4 is a state path diagram of the first control unit from the approaching wireless charging pile to the leaving wireless charging pile in the embodiment of the present invention;

fig. 5 is a charging transceiver dual-system interaction diagram of the control device in the embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

The invention is further described with reference to the following drawings and specific examples, which are not intended to be limiting.

The invention comprises a control device of a wireless charging pile, as shown in fig. 1, comprising a charging end module 1 and a receiving end module 2, wherein the charging end module 1 comprises a transmitting coil 101, and the receiving end module 2 comprises a receiving coil 201; further comprising:

a position sensor (not shown) respectively arranged at the charging terminal module 1 and the receiving terminal module 2 for detecting the relative position of the transmitting coil 101 and the receiving coil 201 and forming a position detection signal;

the power receiving end module 2 further includes:

the first control unit 202 is connected with the position sensor and used for receiving a position detection signal fed back by the position sensor and judging whether the relative position of the transmitting coil and the receiving coil reaches a preset range or not;

a first communication unit 203 in signal connection with the first control unit 202;

the charging terminal module 1 further includes:

and a second control unit 102 connected with a second communication unit 103, wherein the second communication unit 103 is in wireless communication connection with the first communication unit 203 and is used for enabling the first control unit 202 to communicate with the second control unit 102.

Specifically, in this embodiment, the position sensor is preferably a hall sensor, and the hall sensor has high sensitivity and a small volume, which is beneficial to improving the accuracy of the detection position. After the control device is started, the first control unit of the power receiving end module can accurately judge whether the receiving coil reaches the preset position or not through the position detection signal fed back by the Hall sensor, and can start charging after reaching the preset position, so that the charging efficiency and the charging safety are improved. The input end of the charging end module is provided with a PFC (Power Factor Correction) module 3 for connecting an alternating current grid. First communication unit and second communication unit in this embodiment can adopt bluetooth technology wireless connection to realize the wireless communication function of charging end module and receiving end module, so that the user knows the charged state better, promote user's experience.

In a preferred embodiment, as shown in fig. 2, the first control unit specifically includes:

a first control chip U1;

the first input end and the second input end of the amplifier U4 are respectively connected with the receiving coil, and the output end of the amplifier is connected with the first input end RA3 of the first control chip U1 and used for collecting the charging current of the receiving coil, amplifying the charging current and transmitting the amplified charging current to the first control chip U1;

a first resistor R2 and a second resistor R3, wherein the second input end RA2 of the first control chip U1 is connected between the first resistor R2 and the second resistor R3, and is used for sampling the charging voltage of the receiving coil;

the first capacitor C1 is connected between the second input end RA2 of the first control chip U1 and the ground terminal, and is used for filtering the voltage signal input by the first control chip U1;

the third input end RA5 of the first control chip U1 is connected with the Hall sensor and is used for receiving a position detection signal fed back by the Hall sensor.

Specifically, in the present embodiment, the first control chip U1 is a chip of model PIC16F25K 80. The current sampling circuit formed by taking the amplifier U4 as a core further comprises resistors R4, R5 and a capacitor C2 which are connected to a first input end of the amplifier U4, resistors R7, R12, capacitors C4 and C5 which are connected to a second input end of the amplifier U4, and a resistor R6, a capacitor C3 and a diode D1 which are connected to an output end of the amplifier U4. The voltage dividing and stabilizing circuit consisting of the resistors R2 and R3 and the capacitor C1 samples and filters the direct current voltage and sends the sampled and filtered direct current voltage to the RA2 pin of the chip U1. Through the technical scheme, the charging state of the power receiving end module can be monitored in real time, the charging is stopped in time when the charging current or the charging voltage is abnormal, the alarm is given, the user is prompted to remove the fault in time, and the safety of the charging process is improved.

In a preferred embodiment, as shown in fig. 2, the first control unit further includes a plurality of indicator lights of different colors, which are respectively connected to the plurality of output terminals of the first control chip U1 for indicating the charging status of the power receiving terminal module. The charging device comprises 4 indicator lamps which are respectively connected with pins RB1, RB2, RB3 and RB5 of a chip U1, and the chip U1 controls the 4 LED indicator lamps to indicate the charging process.

In a preferred embodiment, as shown in fig. 2, the first control unit further includes a restart key RELAY communicatively connected to the first control chip U1 for controlling the first control chip to restart, and the RC3 pin of the chip U1 is used for detecting the input of the restart key signal.

The invention further provides a control method of the wireless charging pile, which is applied to the control device in the technical scheme, as shown in fig. 3, and the control method comprises the following steps:

step S1, after the control device is powered on, the first control unit receives the position detection signal fed back by the position sensor, and determines whether the relative position of the transmitting coil and the receiving coil reaches a preset range according to the position detection signal:

if yes, go to step S2;

if not, returning to the step S1;

in step S2, the first control unit detects whether the first communication unit and the second communication unit establish a communication connection:

if yes, go to step S3;

if not, returning to the step S2;

step S3, the first control unit collects the induced current of the receiving coil, and determines whether the coupling degree of the receiving coil and the transmitting coil reaches a preset standard:

if yes, starting a charging process of the power receiving end module;

if not, the process returns to step S3.

Specifically, in the control method of this embodiment, the conditions for starting charging include two conditions, that is, the position of the receiving coil of the power receiving module reaches the standard, and that the coupling degree of the receiving coil reaches the standard, where the coupling degree is obtained based on the induced current of the receiving coil, and whether the position reaches the standard is identified based on the signal given by the position sensor. The control device starts the charging mode only when the two conditions are simultaneously satisfied, and does not perform communication to reduce power consumption if the charging start condition is not satisfied.

In a preferred embodiment, the charging process of the wireless charging pile includes a low-current trial charging process, a constant-current charging process and a constant-voltage charging process, as shown in fig. 4, the battery state is detected in real time in each charging process, and once the battery state is abnormal, the charging is stopped immediately.

In a preferred embodiment, in the charging process of the wireless charging pile, the first control unit detects the battery voltage of the power receiving end module every other preset time, and stops charging when the battery voltage is abnormal. The preset time in this embodiment is 20ms, that is, the detection is performed every 20ms, and if there is no response, the charging is stopped.

Specifically, in the present embodiment, as shown in fig. 5, in the process of the wireless charging pile, the first control unit controls the plurality of indicator lamps to indicate the charging state. When a TX pin of the first control chip U1 is powered on, a red indicator light is turned on, and after the self-test is passed, the first control chip enters a standby state, and the red indicator light flashes slowly; after a charging terminal module (receiver) is connected, the blue indicator lamp is normally on, an RX pin of a chip U1 is powered on, a charging control instruction of an upper computer is received after the self-checking is passed, after the charging state is entered, the blue indicator lamp enters a flash mode and is adjusted according to the feedback of the receiver, and if the charging state is abnormal, the red indicator lamp and the blue indicator lamp are simultaneously on. By means of controlling the indicator light, a user can better know the current charging state, and timely adjustment can be conveniently made.

The technical scheme of the invention has the following advantages or beneficial effects: the control device and the control method of the wireless charging pile are provided, the functions of automatically aligning a receiving end module of an electric automobile with the wireless charging pile, starting charging and stopping charging are realized, the communication function between the receiving end module and the wireless charging pile is realized, so that a user can know the real-time charging state in time, and the charging efficiency and the safety of the charging process are further improved.

While the invention has been described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention.