Automatic alignment wireless charging device and method for electric bicycle

Abstract

The present invention discloses an automatic alignment wireless charging device and method for electric bicycles, which relates to the technical field of electric bicycle charging, and the main purpose is to solve the problem that the existing wireless charging of electric bicycles has high requirements for charging alignment. It mainly includes: the energy transmitting component includes a wireless transmitting coil, a transmitting end controller and a transmitting end guide rail, and the energy receiving component includes a wireless receiving coil, a receiving end controller and a receiving end guide rail; the transmitting end controller is used to control the wireless transmitting coil to move on the transmitting end guide rail to find the first axial alignment point on the transmitting end guide rail; the receiving end controller is used to control the wireless receiving coil to move on the receiving end guide rail to find the second axial alignment point on the receiving end guide rail; after the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point, the electric bicycle is wirelessly charged, thereby realizing automatic alignment and wireless charging.

Description

Technical Field

[0001] The present invention relates to the technical field of electric bicycle charging, and in particular to an automatic alignment wireless charging device and method for an electric bicycle. Background Art

[0002] As the global environmental pollution becomes increasingly serious, governments around the world vigorously advocate energy conservation and emission reduction, and actively seek new energy sources to replace traditional fuels. As an important part of new energy vehicles, electric bicycles have broad development prospects. In my country, due to the large population base and the high number of electric bicycles, the charging problem of electric bicycles is particularly important. However, the traditional wired charging method has many inconveniences, such as the charging cable is easily damaged, the charging sockets are limited, and the charging position is restricted. These problems not only affect the normal use of electric bicycles, but may also cause safety hazards. Therefore, the research on wireless charging of electric bicycles is of great significance for the efficient, convenient and safe charging of electric bicycles.

[0003] In the field of wireless charging for electric bicycles, there have been some preliminary attempts and explorations. For example, some scientific research institutions and enterprises have successfully developed wireless induction charging stations for electric bicycles, which consist of three parts: a host, a transmitter, and a receiver. They use a "drop and charge" charging method, that is, the battery bicycle kickstand with a receiver function is connected to the charging transmitter, so that the electric bicycle can be charged without any exposed wires. However, the existing wireless charging devices for electric bicycles have high requirements for charging alignment and have the problem of limited charging positions, which greatly affects the charging efficiency and convenience of charging. Summary of the invention

[0004] In view of this, the present invention provides an automatic alignment wireless charging device and method for an electric bicycle, the main purpose of which is to solve the problem that the existing wireless charging of electric bicycles has high requirements on charging alignment.

[0005] According to one aspect of the present invention, there is provided an automatic alignment wireless charging device for an electric bicycle, comprising:

[0006] An energy transmitting component and an energy receiving component, wherein the energy transmitting component includes a wireless transmitting coil, a transmitting end controller and a transmitting end guide rail, and the energy receiving component includes a wireless receiving coil, a receiving end controller and a receiving end guide rail;

[0007] The transmitter controller is used to find a first axial alignment point on the transmitter guide rail by controlling the wireless transmitter coil to move on the transmitter guide rail;

[0008] The receiving end controller is used to find a second axial alignment point on the receiving end guide rail by controlling the wireless receiving coil to move on the receiving end guide rail;

[0009] The energy transmitting component is used to wirelessly charge the electric bicycle through the energy receiving component after the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point.

[0010] Furthermore, the energy transmitting component also includes a transmitting end power converter and a transmitting end resonant network;

[0011] The input end of the transmitting end power converter is connected to the power supply, and the output end is connected to the input end of the transmitting end resonant network, for generating a high-frequency alternating current signal and transmitting the high-frequency alternating current signal to the transmitting end resonant network;

[0012] The output end of the transmitting end resonant network is connected to the input end of the wireless transmitting coil, and is used to convert the high-frequency alternating current signal into a magnetic field, and emit it through the wireless transmitting coil;

[0013] The transmitting end controller is also used to obtain the effective value of the current at different positions on the moving path; when the moving track of the wireless transmitting coil covers the transmitting end guide rail, the position point with the largest effective value of the current is determined as the first axial alignment point.

[0014] Furthermore, the energy receiving component also includes a receiving-end power converter and a receiving-end resonant network;

[0015] The input end of the receiving end resonant network is connected to the output end of the wireless receiving coil, and the output end is connected to the input end of the receiving end power converter, for converting the electromagnetic wave received by the wireless receiving coil from the wireless transmitting coil into a high-frequency alternating current signal, and transmitting the high-frequency alternating current signal to the receiving end power converter;

[0016] The receiving end controller is also used to obtain the effective value of the voltage at different positions on the moving path; when the moving track of the wireless receiving coil covers the receiving end guide rail, the position point with the largest effective value of the voltage is determined as the second axial alignment point.

[0017] Further, the output end of the receiving end power converter is connected to the battery charging input end of the electric bicycle;

[0018] The receiving-end power converter is also used to convert the high-frequency AC power signal into an electrical signal matching the charging specification of the electric bicycle; and transmit the electrical signal to the electric bicycle to charge the electric bicycle.

[0019] Furthermore, the device also includes a transmitting coil alignment module and a receiving coil alignment module;

[0020] The transmitting coil alignment module is placed on the guide rail surface of the transmitting end guide rail and is connected to the transmitting end controller, and is used to fix the wireless transmitting coil and drive the wireless transmitting coil to move on the transmitting end guide rail under the control of the transmitting end controller;

[0021] The receiving coil alignment module is placed on the guide rail surface of the receiving end guide rail and connected to the receiving end controller to fix the wireless receiving coil and drive the wireless receiving coil to move on the receiving end guide rail under the control of the receiving end controller.

[0022] According to another aspect of the present invention, there is provided an automatic alignment wireless charging method for an electric bicycle, comprising:

[0023] In response to a charging instruction for charging the electric bicycle, the energy transmitting component and the energy receiving component are started, and the wireless transmitting coil of the energy transmitting component is controlled to move on the transmitting end guide rail to find a first axial alignment point on the transmitting end guide rail;

[0024] By controlling the wireless receiving coil of the energy receiving component to move on the receiving end guide rail, a second axial alignment point on the receiving end guide rail is found;

[0025] After the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point, the electric bicycle is wirelessly charged.

[0026] Furthermore, the energy transmitting component further includes a transmitting end power converter and a transmitting end resonant network, and the controlling the wireless transmitting coil of the energy transmitting component to move on the transmitting end guide rail to find the first axial alignment point on the transmitting end guide rail includes:

[0027] During the movement of the wireless transmitting coil, a high-frequency AC signal is output to the transmitting-end resonant network through the transmitting-end power converter, and the high-frequency AC signal is converted into an electromagnetic wave through the transmitting-end resonant network and emitted through the wireless transmitting coil;

[0028] Obtain the effective value of the current at different points on the moving path;

[0029] When the moving track of the wireless transmitting coil covers the transmitting end guide rail, the position point where the effective value of the current is the largest is determined as the first axial alignment point.

[0030] Furthermore, the energy receiving component further includes a receiving end power converter and a receiving end resonant network, and the controlling the wireless receiving coil of the energy receiving component to move on the receiving end rail to find the second axial alignment point on the receiving end rail includes:

[0031] During the movement of the wireless transmitting coil, the electromagnetic wave received by the wireless receiving coil from the wireless transmitting coil is converted into a high-frequency alternating current signal through the receiving end resonant network, and the high-frequency alternating current signal is transmitted to the receiving end power converter;

[0032] Obtaining effective voltage values ​​at different points on the moving path;

[0033] In the case that the moving track of the wireless receiving coil covers the receiving end guide rail, the position point where the effective value of the voltage is the largest is determined as the second axial alignment point.

[0034] Furthermore, the wireless charging of the electric bicycle comprises:

[0035] The high-frequency AC power signal is converted into an electrical signal matching the charging specification of the electric bicycle by a receiving-end power converter;

[0036] The electrical signal is transmitted to the electric bicycle to charge the electric bicycle.

[0037] Furthermore, the method further comprises:

[0038] The wireless transmitting coil is driven to move on the transmitting end guide rail by a transmitting coil alignment module under the control of the transmitting end controller, wherein the transmitting coil alignment module is placed on the guide rail surface of the transmitting end guide rail to fix the wireless transmitting coil;

[0039] The wireless receiving coil is driven to move on the receiving end guide rail through a receiving coil alignment module under the control of the receiving end controller, wherein the receiving coil alignment module is placed on the guide rail surface of the receiving end guide rail to fix the wireless receiving coil.

[0040] By means of the above technical solution, the technical solution provided by the embodiment of the present invention has at least the following advantages:

[0041] The present invention provides an automatic alignment wireless charging device and method for electric bicycles. In the embodiment of the present invention, the transmitter controller controls the wireless transmitter coil to move on the transmitter rail to find the first axial alignment point on the transmitter rail; the receiver controller controls the wireless receiver coil to move on the receiver rail to find the second axial alignment point on the receiver rail, and after the wireless transmitter coil and the wireless receiver coil are aligned according to the first axial alignment point and the second axial alignment point, the electric bicycle is wirelessly charged through the energy receiving component. This device and method greatly reduces the restrictions and requirements of wireless charging on the parking position of electric bicycles, reduces the human intervention in the alignment between charging components, and at the same time ensures the accuracy of alignment, thereby greatly improving the efficiency of wireless charging of electric bicycles.

[0042] The above description is only an overview of the technical solution of the present invention. In order to more clearly understand the technical means of the present invention, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0043] Various other advantages and benefits will become apparent to those of ordinary skill in the art by reading the detailed description of the preferred embodiments below. The accompanying drawings are only for the purpose of illustrating the preferred embodiments and are not to be considered as limiting the present invention. Moreover, the same reference symbols are used throughout the accompanying drawings to represent the same components. In the accompanying drawings:

[0044] Figure 1 A block diagram of an automatic alignment wireless charging device for an electric bicycle provided by an embodiment of the present invention is shown;

[0045] Figure 2 A schematic diagram of a coil movement method provided by an embodiment of the present invention is shown;

[0046] Figure 3 A schematic diagram showing the relationship between internal modules of an energy emission component provided by an embodiment of the present invention;

[0047] Figure 4 A schematic diagram showing the relationship between internal modules of an energy receiving component provided by an embodiment of the present invention is shown;

[0048] Figure 5 A schematic diagram of an automatic alignment wireless charging method for an electric bicycle provided by an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0049] The exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0050] The existing wireless charging device for electric bicycles has high requirements for charging alignment and has the problem of limited charging position. The embodiment of the present invention provides an automatic alignment wireless charging method for electric bicycles, such as Figure 1 As shown, the device includes: an energy transmitting component 100 and an energy receiving component 200, wherein the energy transmitting component 100 includes a wireless transmitting coil 101, a transmitting end controller 102 and a transmitting end guide rail 103, and the energy receiving component 200 includes a wireless receiving coil 201, a receiving end controller 202 and a receiving end guide rail 203.

[0051] In an embodiment of the present invention, when the electric bicycle needs to be charged, the energy receiving component 200 is connected and fixed to the electric bicycle, and the electric bicycle is parked according to the charging and parking requirements. The charging and parking requirements require that the wireless transmitting coil 101 and the wireless receiving coil 201 are on relative planes, and ensure that the transmitting end guide rail 103 and the receiving end guide rail 203 are intersected in space. Preferably, the transmitting end guide rail 103 and the receiving end guide rail 203 are vertical in space. Among them, the charging end of the electric bicycle is connected to the power output end of the energy receiving component 200, and charging can be performed after the alignment is completed. Among them, the energy transmitting component 100 and the energy receiving component 200 can also be configured with a component housing, the transmitting end guide rail 103 is fixed in the housing of the energy transmitting component 100, and the receiving end guide rail 203 is fixed in the housing of the energy receiving component 200.

[0052] The transmitting end controller 102 searches for a first axial alignment point on the transmitting end guide rail 103 by controlling the wireless transmitting coil 101 to move on the transmitting end guide rail 103. The first axial alignment point is the optimal alignment point between the wireless transmitting coil 101 and the wireless receiving coil 201 on the axial direction where the transmitting end guide rail 103 is located. The receiving end controller 202 searches for a second axial alignment point on the receiving end guide rail 203 by controlling the wireless receiving coil 201 to move on the receiving end guide rail 203. The second axial alignment point is the optimal alignment point between the wireless transmitting coil 101 and the wireless receiving coil 201 on the axial direction where the receiving end guide rail 203 is located. The wireless transmitting coil 101 and the wireless receiving coil 201 are aligned according to the first axial alignment point and the second axial alignment point. For example, Figure 2A schematic diagram of a coil movement method is shown, the energy receiving component 200, the wireless receiving coil 201 is installed at the bottom of the middle of the electric bicycle body, and the energy transmitting component 100 is fixed on the ground. During the automatic alignment process, the front and rear wheels 400 of the electric bicycle need to be parked across the two sides of the ground energy transmitting device, and the transmitting end guide rail 103 and the receiving end guide rail 203 are vertical in space. The wireless transmitting coil 101 moves along the transmitting end guide rail 103, and the wireless receiving coil 201 moves along the receiving end guide rail 203, so that alignment can be achieved. After completing the alignment, the energy transmitting component 100 converts the electric energy provided by the power supply into electromagnetic waves, and transmits them to the energy transmitting component 100, so that the electromagnetic waves are converted into direct current signals matching the charging specifications of the electric bicycle through the energy transmitting component 100, and the electric bicycle is charged.

[0053] It should be noted that the first axial alignment point and the second axial alignment point can be identified separately, or can be further identified on the basis that another alignment point has been determined. For example, after the first axial alignment point is determined, the wireless transmitting coil 101 is moved to the first axial alignment point, and the wireless transmitting coil 101 is kept stationary, and then the wireless receiving coil 201 is moved to determine the second axial alignment point, and after the second axial alignment point is determined, the wireless receiving coil 201 is moved to the second axial alignment point, and the wireless charging alignment is completed at this time, and the electric bicycle can be charged. By configuring the transmitting end controller 102 and the transmitting end guide rail 103 and the receiving end controller 202 and the receiving end guide rail 203 in the automatic alignment wireless charging device for electric bicycles, the wireless transmitting coil 101 and the wireless receiving coil 201 can be automatically aligned. Even if the wireless transmitting coil 101 and the wireless receiving coil 201 are not aligned when the electric bicycle is parked, the relative position of the wireless transmitting coil 101 and the wireless receiving coil 201 can be adjusted by automatic alignment. Avoid restrictions on the parking position during wireless charging of electric bicycles, reduce the difficulty of charging operations, and thus improve the efficiency and convenience of wireless charging of electric bicycles.

[0054] In an embodiment of the present invention, for further explanation and limitation, as Figure 3 As shown, the energy transmitting component 100 also includes a transmitting end power converter 104 and a transmitting end resonant network 105; the input end of the transmitting end power converter 104 is connected to the power supply, and the output end is connected to the input end of the transmitting end resonant network 105; the output end of the transmitting end resonant network 105 is connected to the input end of the wireless transmitting coil 101.

[0055] In the embodiment of the present invention, the input end of the transmitting end power converter 104 is connected to the power supply, converts the alternating current input by the power supply into a high-frequency alternating current signal, and transmits the high-frequency alternating current signal to the transmitting end resonant network 105. The transmitting end resonant network 105 converts the high-frequency alternating current signal into an electromagnetic wave or an electric field, and transmits it through the wireless transmitting coil 101 to form a magnetic field in the space where the wireless receiving coil 201 is located, so as to realize wireless transmission of energy. The output end of the transmitting end controller 102 is connected to the control port of the transmitting end power converter 104, and is used to control the operation and stop of the transmitting end power converter 104. During the movement of the wireless transmitting coil 101, the transmitting end controller 102 obtains the effective value of the current at different positions on the moving path. When the moving track of the wireless transmitting coil 101 covers the transmitting end guide rail 103, the effective value of the current at each point on the transmitting end guide rail 103 is scanned, the position corresponding to the maximum effective value of the current is identified, and the position point with the largest effective value of the current is determined as the first axial alignment point. The effective value of the current can be calculated based on the actual current value collected by the transmitting-end power converter 104 or other electrical data collection devices and the actual current value output by the transmitting-end power converter 104 .

[0056] It should be noted that the effective value of the current changes with the relative position between the wireless receiving coil 201 and the wireless transmitting coil 101, and the effective value of the current is the largest when the wireless receiving coil 201 and the wireless transmitting coil 101 are closest. By scanning the effective value of the current at each point on the transmitting end guide rail 103, the point where the wireless receiving coil 201 and the wireless transmitting coil 101 are closest can be determined, thereby achieving an accurate axial alignment.

[0057] In an embodiment of the present invention, for further explanation and limitation, as Figure 4 As shown, the energy receiving component 200 also includes a receiving end power converter 204 and a receiving end resonant network 205 ; the input end of the receiving end resonant network 205 is connected to the output end of the wireless receiving coil 201 , and the output end is connected to the input end of the receiving end power converter 204 .

[0058] In an embodiment of the present invention, the receiving end resonant network 205 converts the electromagnetic waves received by the wireless receiving coil 201 from the wireless transmitting coil 101 into high-frequency AC signals, and transmits the high-frequency AC signals to the receiving end power converter 204. The output end of the receiving end controller 202 is connected to the control port of the receiving end power converter 204, and is used to control the operation and stop of the receiving end power converter 204. The receiving end controller 202 is also used to obtain the effective values ​​of the voltage at different positions on the moving path. In the case where the moving trajectory of the wireless receiving coil 201 covers the receiving end guide rail 203, the effective values ​​of the voltages at various points on the receiving end guide rail 203 are scanned, the position corresponding to the maximum effective value of the voltage is identified, and the position point with the maximum effective value of the voltage is determined as the second axial alignment point. Among them, the effective value of the voltage can be calculated based on the actual value of the voltage collected by the receiving end power converter 204 or other electrical data acquisition devices.

[0059] It should be noted that, at the energy receiving end, the effective value of the current does not change with the relative position change between the wireless receiving coil 201 and the wireless transmitting coil 101. However, the effective value of the voltage is affected by the relative position change between the wireless receiving coil 201 and the wireless transmitting coil 101. According to the change in the effective value of the voltage, the point (the second axial alignment point) where the wireless receiving coil 201 and the wireless transmitting coil 101 are closest to each other on the receiving end guide rail 203 is identified to achieve the alignment of the wireless receiving coil 201 and the wireless transmitting coil 101. By aligning in the first axial direction and the second axial direction, accurate point alignment of the wireless receiving coil 201 and the wireless transmitting coil 101 can be achieved, thereby ensuring the accuracy of the automatic alignment of the wireless receiving coil 201 and the wireless transmitting coil 101.

[0060] In one embodiment of the present invention, for further explanation and limitation, the output end of the receiving end power converter 204 is connected to the battery charging input end of the electric bicycle.

[0061] In an embodiment of the present invention, after the wireless receiving coil 201 and the wireless transmitting coil 101 are aligned, the receiving-end power converter 204 converts the high-frequency AC power signal received from the receiving-end resonant network 205 into an electrical signal that matches the charging specifications of the electric bicycle; and transmits the electrical signal to the battery charging input of the electric bicycle. The connection between the output of the receiving-end power converter 204 and the battery charging input can be detachable, such as the energy receiving component 200 is detachable from the electric bicycle, and is manually plugged in by the user when charging is required. It can also be inseparable, such as the energy receiving component 200 is a vehicle-mounted component that is pre-installed on the electric bicycle and does not need to be connected when charging.

[0062] In an embodiment of the present invention, for further explanation and limitation, as Figure 3 , Figure 4 As shown, the device further includes a transmitting coil alignment module 106 and a receiving coil alignment module 206 .

[0063] In the embodiment of the present invention, the transmitting coil alignment module 106 is placed on the guide rail surface of the transmitting end guide rail 103. The transmitting end controller 102 is connected to the transmitting coil alignment module 106, and is used to control the transmitting coil alignment module 106 to move on the transmitting end guide rail 103. The transmitting coil alignment module 106 is used to fix the wireless transmitting coil 101, and under the control of the transmitting end controller 102, drive the wireless transmitting coil 101 to move on the transmitting end guide rail 103. In the process of determining the first axial alignment point, the transmitting end controller 102 controls the transmitting coil alignment module 106 to carry the wireless transmitting coil 101 to move on the transmitting end guide rail 103 to identify the position point with the maximum effective value of the current.

[0064] The receiving coil alignment module 206 is placed on the guide rail surface of the receiving end guide rail 203, and the receiving end controller 202 is connected to the receiving coil alignment module 206 to control the receiving coil alignment module 206 to move on the receiving end guide rail 203. The receiving coil alignment module 206 is used to fix the wireless receiving coil and drive the wireless receiving coil 201 to move on the receiving end guide rail 203 under the control of the receiving end controller 202. In the process of determining the second axial alignment point, the receiving end controller 202 controls the receiving coil alignment module 206 to carry the wireless receiving coil 201 to move on the receiving end guide rail 203 to identify the position point with the maximum voltage effective value.

[0065] The present invention provides an automatic alignment wireless charging device for electric bicycles. In the embodiment of the present invention, the transmitting end controller controls the wireless transmitting coil to move on the transmitting end guide rail to find the first axial alignment point on the transmitting end guide rail; the receiving end controller controls the wireless receiving coil to move on the receiving end guide rail to find the second axial alignment point on the receiving end guide rail, and after the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point, the electric bicycle is wirelessly charged through the energy receiving component. This device greatly reduces the restrictions and requirements of wireless charging on the parking position of electric bicycles, reduces the human intervention in the alignment between charging components, and at the same time ensures the accuracy of alignment, thereby greatly improving the efficiency of wireless charging of electric bicycles.

[0066] Furthermore, as a response to the above Figure 1 The embodiment of the present invention provides an automatic alignment wireless charging method for an electric bicycle, such as Figure 5 As shown, the method includes:

[0067] 301. In response to a charging instruction for charging the electric bicycle, the energy transmitting component and the energy receiving component are started, and the wireless transmitting coil of the energy transmitting component is controlled to move on the transmitting end guide rail to find a first axial alignment point on the transmitting end guide rail.

[0068] 302. Find a second axial alignment point on the receiving end guide rail by controlling the wireless receiving coil of the energy receiving component to move on the receiving end guide rail.

[0069] 303. After the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point, wirelessly charge the electric bicycle.

[0070] In an embodiment of the present invention, in response to a charging instruction for charging an electric bicycle, the energy transmitting component is started by the transmitting end controller, and the energy receiving component is started by the receiving end controller, so that the wireless transmitting coil sends electromagnetic waves to the wireless receiving coil. Among them, the charging instruction for charging the electric bicycle can be based on a button trigger, or it can be based on the parking trigger of the electric bicycle according to the charging parking requirements, which is not specifically limited in the embodiment of the present invention. Controlling the movement of the wireless receiving coil on the receiving end rail can be based on a fixing device between the wireless receiving coil and the receiving end rail, or the wireless receiving coil can be installed on the receiving end rail, and the rail directly drives the wireless receiving coil to move. The movement of the wireless receiving coil can be from the starting end of the receiving end rail to the ending end, that is, after each energy receiving component is started, the wireless receiving coil automatically returns to the starting end of the receiving end rail. It can also be moved from any position of the receiving end rail, as long as the moving path covers the entire receiving end rail, which is not specifically limited in the embodiment of the present invention. The movement of the wireless transmitting coil is the same as the movement of the wireless receiving coil, and the embodiment of the present invention will not be repeated here.

[0071] In one embodiment of the present invention, for further explanation and limitation, the step of controlling the wireless transmitting coil of the energy transmitting assembly to move on the transmitting end guide rail to find the first axial alignment point on the transmitting end guide rail includes:

[0072] During the movement of the wireless transmitting coil, a high-frequency AC signal is output to the transmitting-end resonant network through the transmitting-end power converter, and the high-frequency AC signal is converted into an electromagnetic wave through the transmitting-end resonant network and emitted through the wireless transmitting coil;

[0073] Obtain the effective value of the current at different points on the moving path;

[0074] When the moving track of the wireless transmitting coil covers the transmitting end guide rail, the position point where the effective value of the current is the largest is determined as the first axial alignment point.

[0075] In an embodiment of the present invention, during the movement of the wireless transmitting coil, the wireless transmitting coil continuously emits electromagnetic waves, and the wireless receiving coil continuously receives electromagnetic waves. The effective value of the current at the transmitting end changes with the relative position between the wireless receiving coil and the wireless transmitting coil, and the effective value of the current at the closest distance between the wireless receiving coil and the wireless transmitting coil is the largest. By scanning the effective value of the current at each point on the transmitting end guide rail until the moving trajectory of the wireless transmitting coil covers the starting end to the ending end of the transmitting end guide rail, and identifying the one with the largest effective value of the current from the effective values ​​of all the collected position points, the point where the wireless receiving coil and the wireless transmitting coil are closest can be determined, thereby achieving an accurate axial alignment. Among them, the collection position point of the effective value of the current can be an equal unit distance, that is, the effective value of the current is collected once every unit distance of the wireless transmitting coil, so as to facilitate the correspondence between the position point and the effective value of the current.

[0076] In one example, the wireless transmitting coil starts to move from the initial end of the transmitting end guide rail. The transmitting end controller controls the wireless transmitting coil to move a unit distance. , record a current effective value I( ), and determine whether the wireless transmitting coil has reached the end of the transmitting end rail. The total moving distance of the wireless transmitting coil is X( ) = , It is an integer with an initial value of 0. If the wireless transmitting coil has not reached the end of the guide rail, it returns to execute the control of the wireless transmitting coil to move a unit distance , record a current effective value I( ), and determine whether the wireless transmitting coil has reached the terminal end of the transmitting end guide rail. If it reaches the terminal end, determine I( ) when the maximum , that is I( )≥I( ),in Can be any value, and control the wireless transmitting coil to move to X( )Location.

[0077] In one embodiment of the present invention, for further explanation and limitation, the step of controlling the wireless receiving coil of the energy receiving assembly to move on the receiving end guide rail to find the second axial alignment point on the receiving end guide rail includes:

[0078] During the movement of the wireless transmitting coil, the electromagnetic wave received by the wireless receiving coil from the wireless transmitting coil is converted into a high-frequency alternating current signal through the receiving end resonant network, and the high-frequency alternating current signal is transmitted to the receiving end power converter;

[0079] Obtaining effective voltage values ​​at different points on the moving path;

[0080] In the case that the moving track of the wireless receiving coil covers the receiving end guide rail, the position point where the effective value of the voltage is the largest is determined as the second axial alignment point.

[0081] In an embodiment of the present invention, at the energy receiving end, the effective value of the current does not change with the relative position between the wireless receiving coil and the wireless transmitting coil. However, the effective value of the voltage is affected by the relative position between the wireless receiving coil and the wireless transmitting coil. According to the change in the effective value of the voltage, the point (the second axial alignment point) where the wireless receiving coil and the wireless transmitting coil are closest on the guide rail of the receiving end is identified to achieve the alignment of the wireless receiving coil and the wireless transmitting coil. By aligning in the first axial direction and the second axial direction, accurate point alignment of the wireless receiving coil and the wireless transmitting coil can be achieved, thereby ensuring the accuracy of the automatic alignment of the wireless receiving coil and the wireless transmitting coil.

[0082] In one example, after the wireless transmitting coil is aligned, the wireless transmitting coil is kept stationary and the wireless receiving coil is moved for alignment. The wireless receiving coil starts to move from the initial end of the receiving end guide rail. The receiving end controller controls the wireless receiving coil to move a unit distance. , record a voltage effective value U( ), and judge whether the wireless receiving coil has reached the terminal end of the receiving end guide rail. Among them, the total moving distance of the wireless receiving coil is Y( ) = , It is an integer with an initial value of 0. If the wireless receiving coil has not reached the end of the guide rail, it returns to execute the control of the wireless receiving coil to move a unit distance , record a voltage effective value U( ), and determine whether the wireless receiving coil has reached the terminal end of the receiving end guide rail. If it has reached the terminal end, determine I( ) when the maximum , that is U( )≥U( ),in Can be any value, and control the wireless receiving coil to move to Y( ) position, and the automatic alignment is completed.

[0083] In one embodiment of the present invention, for further explanation and limitation, the wireless charging of the electric bicycle includes:

[0084] The high-frequency alternating current signal is converted into an electrical signal matching the charging specification of the electric bicycle by a receiving-end power converter;

[0085] The electrical signal is transmitted to the electric bicycle to charge the electric bicycle.

[0086] In the embodiment of the present invention, after the wireless receiving coil and the wireless transmitting coil are aligned, the receiving end power converter converts the high-frequency AC signal received from the receiving end resonant network into an electrical signal that matches the charging specification of the electric bicycle; transmits the electrical signal to the electric bicycle to charge the electric bicycle, thereby realizing automatic alignment and wireless charging of the electric bicycle. The electrical signal that matches the charging specification of the electric bicycle is a DC signal or an AC signal, which is specifically determined according to the type of the rechargeable battery of the electric bicycle.

[0087] In an embodiment of the present invention, for further explanation and limitation, the method further includes:

[0088] The wireless transmitting coil is driven to move on the transmitting end guide rail by a transmitting coil alignment module under the control of the transmitting end controller, wherein the transmitting coil alignment module is placed on the guide rail surface of the transmitting end guide rail to fix the wireless transmitting coil;

[0089] The wireless receiving coil is driven to move on the receiving end guide rail through a receiving coil alignment module under the control of the receiving end controller, wherein the receiving coil alignment module is placed on the guide rail surface of the receiving end guide rail to fix the wireless receiving coil.

[0090] In the embodiment of the present invention, the wireless transmitting coil and the wireless receiving coil are both in contact with the guide rail through the corresponding alignment module. The alignment module is equivalent to the carrier of the coil, avoiding direct contact between the coil and the guide rail surface. The coil and the alignment module can be fixedly connected or non-fixedly connected, thereby improving the assembly flexibility of the coil and making it easier to maintain later.

[0091] The present invention provides an automatic alignment wireless charging method for an electric bicycle. In the embodiment of the present invention, a transmitter controller controls the wireless transmitter coil to move on the transmitter rail to find a first axial alignment point on the transmitter rail; a receiver controller controls the wireless receiver coil to move on the receiver rail to find a second axial alignment point on the receiver rail, and after the wireless transmitter coil and the wireless receiver coil are aligned according to the first axial alignment point and the second axial alignment point, the electric bicycle is wirelessly charged through the energy receiving component. This method greatly reduces the restrictions and requirements of wireless charging on the parking position of the electric bicycle, reduces the human intervention in the alignment between the charging components, and at the same time ensures the accuracy of the alignment, thereby greatly improving the efficiency of wireless charging of the electric bicycle.

[0092] Obviously, those skilled in the art should understand that the above modules or steps of the present invention can be implemented by a general computing device, they can be concentrated on a single computing device, or distributed on a network composed of multiple computing devices, and optionally, they can be implemented by a program code executable by a computing device, so that they can be stored in a storage device and executed by the computing device, and in some cases, the steps shown or described can be executed in a different order than here, or they can be made into individual integrated circuit modules, or multiple modules or steps therein can be made into a single integrated circuit module for implementation. Thus, the present invention is not limited to any specific combination of hardware and software.

[0093] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. An automatic alignment wireless charging device for an electric bicycle, characterized in that: include: An energy transmitting component and an energy receiving component, wherein the energy transmitting component includes a wireless transmitting coil, a transmitting end controller and a transmitting end guide rail, and the energy receiving component includes a wireless receiving coil, a receiving end controller and a receiving end guide rail; The transmitter controller is used to find a first axial alignment point on the transmitter guide rail by controlling the wireless transmitter coil to move on the transmitter guide rail; The receiving end controller is used to find a second axial alignment point on the receiving end guide rail by controlling the wireless receiving coil to move on the receiving end guide rail; The energy transmitting component is used to wirelessly charge the electric bicycle through the energy receiving component after the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point; The energy transmitting component also includes a transmitting end power converter and a transmitting end resonant network; The input end of the transmitting end power converter is connected to the power supply, and the output end is connected to the input end of the transmitting end resonant network, for generating a high-frequency alternating current signal and transmitting the high-frequency alternating current signal to the transmitting end resonant network; The output end of the transmitting end resonant network is connected to the input end of the wireless transmitting coil, and is used to convert the high-frequency alternating current signal into a magnetic field, and emit it through the wireless transmitting coil; The transmitter controller is further used to obtain the effective value of the current at different positions on the moving path; when the moving track of the wireless transmitting coil covers the transmitting end guide rail, the position point with the maximum effective value of the current is determined as the first axial alignment point; The energy receiving component also includes a receiving end power converter and a receiving end resonant network; The input end of the receiving end resonant network is connected to the output end of the wireless receiving coil, and the output end is connected to the input end of the receiving end power converter, for converting the electromagnetic wave received by the wireless receiving coil from the wireless transmitting coil into a high-frequency alternating current signal, and transmitting the high-frequency alternating current signal to the receiving end power converter; The receiving end controller is also used to obtain the effective value of the voltage at different positions on the moving path; when the moving track of the wireless receiving coil covers the receiving end guide rail, the position point with the largest effective value of the voltage is determined as the second axial alignment point.

2. The device according to claim 1, characterized in that The output end of the receiving end power converter is connected to the battery charging input end of the electric bicycle; The receiving-end power converter is further used to convert the high-frequency AC power signal into an electrical signal matching the charging specification of the electric bicycle; The electrical signal is transmitted to the electric bicycle to charge the electric bicycle.

3. The device according to claim 1 or 2, characterized in that: The device also includes a transmitting coil alignment module and a receiving coil alignment module; The transmitting coil alignment module is placed on the guide rail surface of the transmitting end guide rail and is connected to the transmitting end controller, and is used to fix the wireless transmitting coil and drive the wireless transmitting coil to move on the transmitting end guide rail under the control of the transmitting end controller; The receiving coil alignment module is placed on the guide rail surface of the receiving end guide rail and connected to the receiving end controller to fix the wireless receiving coil and drive the wireless receiving coil to move on the receiving end guide rail under the control of the receiving end controller.

4. An automatic alignment wireless charging method for an electric bicycle, characterized in that: include: In response to a charging instruction for charging the electric bicycle, the energy transmitting component and the energy receiving component are started, and the wireless transmitting coil of the energy transmitting component is controlled to move on the transmitting end guide rail to find a first axial alignment point on the transmitting end guide rail; By controlling the wireless receiving coil of the energy receiving component to move on the receiving end guide rail, a second axial alignment point on the receiving end guide rail is found; After the wireless transmitting coil and the wireless receiving coil are aligned according to the first axial alignment point and the second axial alignment point, wirelessly charging the electric bicycle; The energy transmitting component further includes a transmitting end power converter and a transmitting end resonant network. The method of controlling the wireless transmitting coil of the energy transmitting component to move on the transmitting end guide rail to find the first axial alignment point on the transmitting end guide rail includes: During the movement of the wireless transmitting coil, a high-frequency AC signal is output to the transmitting-end resonant network through the transmitting-end power converter, and the high-frequency AC signal is converted into an electromagnetic wave through the transmitting-end resonant network and emitted through the wireless transmitting coil; Obtain the effective value of the current at different points on the moving path; When the moving track of the wireless transmitting coil covers the transmitting end guide rail, the position point where the effective value of the current is the largest is determined as the first axial alignment point; The energy receiving component further includes a receiving end power converter and a receiving end resonant network. The method of controlling the wireless receiving coil of the energy receiving component to move on the receiving end rail to find a second axial alignment point on the receiving end rail includes: During the movement of the wireless transmitting coil, the electromagnetic wave received by the wireless receiving coil from the wireless transmitting coil is converted into a high-frequency alternating current signal through the receiving end resonant network, and the high-frequency alternating current signal is transmitted to the receiving end power converter; Obtaining effective voltage values ​​at different points on the moving path; In the case that the moving track of the wireless receiving coil covers the receiving end guide rail, the position point where the effective value of the voltage is the largest is determined as the second axial alignment point.

5. The method according to claim 4, characterized in that The wireless charging of the electric bicycle comprises: The high-frequency AC power signal is converted into an electrical signal matching the charging specification of the electric bicycle by a receiving-end power converter; The electrical signal is transmitted to the electric bicycle to charge the electric bicycle.

6. The method according to claim 4 or 5, characterized in that: The method further comprises: The wireless transmitting coil is driven to move on the transmitting end guide rail by a transmitting coil alignment module under the control of the transmitting end controller, wherein the transmitting coil alignment module is placed on the guide rail surface of the transmitting end guide rail to fix the wireless transmitting coil; The wireless receiving coil is driven to move on the receiving end guide rail through the receiving coil alignment module under the control of the receiving end controller, wherein the receiving coil alignment module is placed on the guide rail surface of the receiving end guide rail to fix the wireless receiving coil.

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