KR102620134B1 - Inductive wireless charging system and method - Google Patents

Abstract

The present invention relates to a door-to-door inductive wireless charging system and method, and particularly to a door-to-door inductive wireless charging system and method that can effectively charge a plurality of vehicles. The present invention provides a charging module for charging a vehicle from a charging station by providing a resonant body composed of a primary resonant body on one side of the door of the vehicle and a secondary resonant body on the other side; and a motor unit that adjusts the position or angle of the charging module to supply inductive power between the resonant body of the vehicle and the resonant body of another vehicle adjacent to the vehicle. The vehicle receives power from the charging station and uses the resonant body to continuously It provides a door-to-door inductive wireless charging system that is capable of transmitting and receiving power to other adjacent vehicles.
According to the present invention, there is the advantage of ensuring convenience when charging because there is no need to open, close, and connect the charging unit, and by enabling one-to-many charging, the problem of insufficient charging stations is solved and charging efficiency is increased, and additional costs are incurred. There is an advantage in being able to expand the charging infrastructure at low cost.

Description

Door-to-door inductive wireless charging system and method {INDUCTIVE WIRELESS CHARGING SYSTEM AND METHOD}

The present invention relates to a door-to-door inductive wireless charging system and method, and particularly to a door-to-door inductive wireless charging system and method that can effectively charge a plurality of vehicles.

Eco-friendly vehicles (electric vehicles, hybrid electric vehicles, etc.) are equipped with a battery to drive the motor, and the battery is usually charged using a wired plug-in charging method or a fast charging method.

Recently, a method of charging a vehicle's high-voltage battery using a wireless power transmission system has been developed. Wireless power transmission is a technology developed to pursue freedom from wires and can be broadly divided into magnetic induction, magnetic resonance, and electromagnetic wave methods. You can.

The magnetic resonance method or electromagnetic wave method has the advantage of a long charging distance, but has the problem of large power loss. The magnetic induction method is a technology that utilizes non-radiative characteristics and non-resonators. It uses the principle of electromagnetic induction, in which when a magnetic field is generated in the coil of the power transmitter, electricity is induced in the coil of the receiver under the influence of the magnetic field.

In this regard, the existing Korean Patent Publication No. 10-2017-0051100 (Magnetic field control system and method for vehicle wireless charging system) discloses a technology for wireless charging by measuring the magnetic field of a vehicle.

However, the conventional technology has the problem that charging is not possible if the vehicle is not moving even if it is fully charged, and charging space is still insufficient.

Korea Publication (Registered) Patent No. 10-2017-0051100

The purpose of the present invention is to provide a door-to-door inductive wireless charging system that allows charging even when a fully charged vehicle does not move in a parking area with limited charging space.

In order to achieve the above object, the present invention is a door-to-door inductive wireless charging system that charges a vehicle by receiving power from a charging station, and is provided with a resonator composed of a primary resonator on one side of the door of the vehicle and a secondary resonator on the other side. A charging module that charges the vehicle from the charging station; And a motor unit that adjusts the position or angle of the charging module that supplies inductive power between the vehicle's resonant body and the resonant body of another vehicle adjacent to the vehicle. The vehicle receives power from the charging station and continuously uses the resonant body. One feature is to provide a door-to-door inductive wireless charging system that is capable of transmitting and receiving power to other adjacent vehicles.

Preferably, the charging module can be connected to the charging station by wire when other adjacent vehicles move away from each other by a predetermined distance or more.

Preferably, when the vehicle moves away from other adjacent vehicles by a predetermined distance or more, an intermediate medium capable of wirelessly transmitting power between each vehicle may be further included.

Preferably, the intermediary includes: a touch sensor installed in the parking space area of the vehicle and consisting of a bump to detect whether or not the vehicle is parked; Or a weight sensor installed at the bottom of the vehicle's parking space to detect the weight of the vehicle; It may further include at least one of the following.

In addition, the present invention provides a door-to-door inductive wireless charging method for charging a vehicle by receiving power from a charging station, including the steps of determining whether there is an adjacent vehicle while the charging module of the vehicle is charging through a primary resonator; Transmitting wireless power using a secondary resonator when there is an adjacent vehicle; and determining the charging amount per second in the vehicle or an adjacent vehicle and driving the motor unit connected to the resonant body. Another feature is to provide a door-to-door inductive wireless charging method including a step.

Preferably, the motor unit rotates at least one of the x-axis, y-axis, or z-axis of the resonant body and changes the charging amount per second; and fixing the motor unit when the charging amount per second is greater than a predetermined set value.

Preferably, it further includes the step of settling the fee after the charging of the vehicle is completed, and the fee is arranged sequentially according to the order (n) in which adjacent vehicles are located (charging fee) = (electricity amount) * (charge It can be calculated as: power)*(charge reduction rate)^n.

According to the present invention having the above-described configuration, there is an advantage in ensuring convenience during charging by eliminating the need for opening, closing, and connecting the charging unit.

In addition, the present invention has the advantage of solving the problem of insufficient charging stations and increasing charging efficiency by enabling one-to-many charging.

Additionally, the present invention has the advantage of being able to expand charging infrastructure at low cost without investing additional costs.

Additionally, the present invention has the advantage of preventing excessive installation costs of wireless charging modules on the road.

Figure 1 shows a conventional wireless charging system.
Figure 2 shows a door-to-door inductive wireless charging system of the present invention.
Figure 3 shows the internal configuration of the charging module of the present invention.
Figure 4 shows the principle of the door-to-door inductive wireless charging system of the present invention.
Figure 5 shows a wired connection method between a charging station and a vehicle according to an embodiment of the present invention.
Figure 6 shows an example of a charging method in the absence of an intermediate medium according to the present invention.
Figure 7 shows another embodiment of the charging method in the absence of an intermediate medium of the present invention.
Figure 8 shows the bump sensing type (a) and weight sensing type (b) of the intermediate medium of the present invention.
Figure 9 shows the detailed structure of the intermediate of the present invention.
Figure 10 shows a flowchart of the step of increasing the charging amount in the door-to-door inductive wireless charging method of the present invention.
Figure 11 shows the operation of the motor unit and the charging module to increase charging efficiency according to an embodiment of the present invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. However, the present invention is not limited or limited by the exemplary embodiments. The same reference numerals in each drawing indicate members that perform substantially the same function.

The purpose and effect of the present invention can be naturally understood or become clearer through the following description, and the purpose and effect of the present invention are not limited to the following description. Additionally, in describing the present invention, if it is determined that a detailed description of known techniques related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted.

Figure 1 shows a conventional wireless charging system. Referring to FIG. 1, the conventional wireless charging system of FIG. 1(a) uses a wireless charging method by installing a wireless reception charging device at the bottom. Figure 1(b) shows a charging system capable of charging a moving vehicle through a power supply rail.

However, in the case of Figure 1(a), the conventional system can only charge a single vehicle and has the disadvantage of having to be very close to the electric transmitting device, and in the case of Figure 1(b), it can be installed compatible with existing roads. There is a disadvantage of having to install a new wireless charging road rather than installing a new wireless charging road.

Figure 2 shows a door-to-door inductive wireless charging system of the present invention. Referring to FIG. 2, a door-to-door inductive wireless charging system capable of wireless charging between vehicles is shown to improve the problems of the conventional system as shown in FIG. 1.

A door-to-door inductive wireless charging system that charges a vehicle by receiving power from a charging station, comprising: a charging module that has a resonating body composed of a primary resonating body on one side of the door of the vehicle and a secondary resonating body on the other side to charge the vehicle from the charging station; And a motor unit that adjusts the position or angle of the charging module that supplies inductive power between the vehicle's resonant body and the resonant body of another vehicle adjacent to the vehicle. The vehicle receives power from the charging station and continuously uses the resonant body. A door-to-door inductive wireless charging system is provided, which is capable of transmitting and receiving power to other adjacent vehicles.

Referring to FIG. 2(a), the charging module includes resonating bodies on both sides of the door, and may include a primary resonating body on one side and a secondary resonating body on the other side. Each resonant body can perform the role of transmitting or receiving power. Additionally, the motor unit can adjust the power efficiency with adjacent resonating bodies by adjusting the position or angle of these resonating bodies.

When charging at a charging station, wireless charging becomes possible when the charging station (secondary resonant body) is approached without any additional manipulation. In order to improve the case where there is a car at the charging station even though the charging station is insufficient and fully charged, a vehicle with a resonating body becomes another resonating body for other adjacent vehicles, so there is no need to secure a charging station according to the number of cars.

Figure 3 shows the internal configuration of the charging module of the present invention. Referring to Figure 3, in a wireless charging method through electromagnetic induction from a charging station, a power supply coil is installed inside the vehicle door, and this coil is connected to the vehicle battery for power transmission.

The charging coil module is equipped with a motor unit that can help find the optimal charging area left, right, and top and bottom to minimize area loss when transmitting and receiving power with various vehicle types. Figure 3(a) shows a structure that can move the coil according to the movement of each motor, and Figure 3(b) shows the charging module being deployed when the lateral movement motor is driven.

Figure 4 shows the principle of the door-to-door inductive wireless charging system of the present invention. Referring to Figure 4, it shows a charging method using the magnetic resonance method, which is the present technology, and shows that it can be used as a wireless power transmission device using a charging station separately provided on the side as a secondary resonator. When a magnetic field is generated and transmitted from one resonant body, power can be supplied by receiving the magnetic field from another resonant body. In other words, using the magnetic resonance method , if an alternating magnetic field is generated in one coil, this can be received by the other coil to create power. However, it is not limited to the magnetic resonance method, and can be applied to any technology that uses wireless power transmission for wireless charging.

Figure 5 shows a wired connection method between a charging station and a vehicle according to an embodiment of the present invention. The charging module can be connected to the charging station by wire when other nearby vehicles move away from each other by more than a predetermined distance.

In the case of Figure 5, it shows that charging between the charging station and the primary vehicle can be done using the same connecting method as before, as a way to increase the charging efficiency of the primary resonator.

Figure 6 shows an example of a charging method in the absence of an intermediate medium of the present invention. It may further include an intermediary that can wirelessly transmit power between each vehicle when the vehicle moves away from other adjacent vehicles by a predetermined distance or more.

The intermediary is intended to compensate for the loss of transmitted power due to distance. A vehicle may be an intermediary, or it can play a role in compensating for this when there are no adjacent vehicles. However, if there is no such intermediate medium, power loss can be compensated as shown in FIGS. 6(a) to 6(d).

The intermediate medium includes a touch sensor installed in the parking space area of the vehicle and consisting of a bump to detect whether the vehicle is parked; Or a weight sensor installed at the bottom of the vehicle's parking space to detect the weight of the vehicle; It may further include at least one of the following.

In the case of Figure 6(a), if there are no consecutive vehicles, the middle vehicle may be removed during charging. In this case, because charging efficiency decreases in proportion to distance, charging efficiency can be maintained through separate connection with a wire installed inside the vehicle.

In the case of Figure 6(b), there are cases where the middle vehicle falls out during charging. In this case, since charging efficiency decreases in proportion to the distance, charging efficiency can be increased by operating an intermediate medium (resonator) separately provided in the parking lot to rise from the bottom of the parking lot. In the case of an intermediate medium, it operates through a weight detection sensor. Since the intermediate medium consists only of coils, the installation cost is much lower than the cost of installing a separate charging station.

In the case of Figure 6(c), there are cases where the middle vehicle is disconnected during charging. In this case, since charging efficiency decreases in proportion to the distance, charging efficiency can be increased by operating an intermediary (resonant material) separately provided in the parking lot that is stacked at the bottom of the parking lot and then deployed. In the case of an intermediate medium, it operates through a weight detection sensor. Since the intermediate medium consists only of coils, the installation cost is much lower than the cost of installing a separate charging station.

In the case of Figure 6(d), there are cases where the middle vehicle falls out during charging. In this case, charging efficiency decreases in proportion to the distance. In this case, information about the continuous charging amount between the charging station and the vehicle system is monitored. If the intermediate vehicle is removed and the charging level drops below a certain level, the automatic parking function inside the vehicle can be used to move the vehicle to an empty space and place the vehicle close to the charging station so that charging can continue.

Figure 7 shows another embodiment of the charging method in the absence of an intermediate medium of the present invention. Referring to FIG. 7, there are cases where the middle vehicle falls out during charging. In this case, because charging efficiency decreases in proportion to distance, there is a need to place vehicles adjacent to each other so that they can be adjacent to each other. Therefore, in the case of this guardrail type, the rail must be wide enough to use the charging station.

In addition, parked vehicles are raised on the rail using a lift so that only necessary vehicles can move when the guardrail is activated, and only vehicles that need to be moved are seated on the rail and can come down and move.

Figure 8 shows the bump sensing type (a) and weight sensing type (b) of the intermediate medium of the present invention. The intermediate medium includes a touch sensor installed in the parking space area of the vehicle and consisting of a bump to detect whether the vehicle is parked; Or a weight sensor installed at the bottom of the vehicle's parking space to detect the weight of the vehicle; It may further include at least one of the following.

In order to reduce the gap between vehicles, it has an appearance that consists only of a coil and a cover. It operates by detecting the presence or absence of a vehicle in the parking space using a touch sensor located within the bump and a weight sensor located on the floor. When there is no vehicle, there is a method where they are raised by a cylinder motor and a method where they are placed on top of each other on the floor and then spread like wings using a motor.

Figure 9 shows the detailed structure of the intermediate of the present invention. Referring to Figure 9(a), wiring is connected to the opposite side to transmit wireless charging power from the charging side. In the case of the built-in battery, it is for the operation of the intermediate charging medium and the sensor. In the case of battery charging, a part of the power transmitted during the operation of the intermediate medium is stored.

Referring to Figure 9(b), since it must be deployed only when there is no vehicle, it goes down to the bottom of the floor when there is no vehicle and operates through sensor detection when the vehicle leaves. The operating method is one that comes up directly from the bottom, and that they are stacked on top of each other and located on the floor, and can be unfolded when the vehicle is not present.

Hereinafter, a method of wireless charging through a door-to-door inductive wireless charging system will be described along with FIGS. 10 and 11.

Figure 10 shows a flowchart of the step of increasing the charging amount in the door-to-door inductive wireless charging method of the present invention. The door-to-door inductive wireless charging method may largely include determining whether a vehicle is adjacent, transmitting wireless power, and increasing the charging amount. A door-to-door inductive wireless charging method for charging a vehicle by receiving power from a charging station, comprising: determining whether there is an adjacent vehicle while the charging module of the vehicle is charging through a primary resonator; Transmitting wireless power using a secondary resonator when there is an adjacent vehicle; and determining the charging amount per second in the vehicle or an adjacent vehicle and driving the motor unit connected to the resonant body.

Referring to FIG. 10, a flowchart of the step of increasing the charging amount in the door-to-door inductive wireless charging method of the present invention is shown, where the motor unit rotates at least one of the x-axis, y-axis, or z-axis of the resonant body to increase the charging amount per second. Steps to change; and fixing the motor unit when the charging amount per second is greater than a predetermined set value.

Measure the initial charge amount per second, rotate the x-axis, check the maximum charge amount per second on the x-axis, and then fix the x-axis position. By rotating the z-axis and y-axis in the same way as the x-axis, you can set the positions of each z-axis and y-axis that satisfy the maximum charging amount per second.

Figure 11 shows the operation of the motor unit and the charging module to increase charging efficiency according to an embodiment of the present invention. Referring to Figure 11, since charging efficiency increases as the distance becomes closer, this is a technology that brings the charging modules of each vehicle closer together as a way to increase this.

When in the parking state, the charging module is deployed through the side motor described above. If direct fastening is not possible due to the internal structure, gears (lock & pinion / worm) can be used to create a more smooth patch.

The door position and height are different for each vehicle model. In addition, even for the same vehicle model, the positions of doors facing each other may vary depending on the parking location. This can be a vulnerability in wireless charging, where area efficiency is important, so this can be supplemented by implementing this technology.

Finally, a step of settling the fee after charging of the vehicle is completed may be further included. The charge can be calculated as (charging charge)=(electricity amount)*(charging power)*(charging reduction rate)^n according to the order (n) in which adjacent vehicles are arranged sequentially.

An embodiment of settlement can be calculated as follows, assuming that the charging efficiency is the same for each vehicle.

1st vehicle at charging station: Charging fee = (electricity amount) * (power consumed when charging), 2nd vehicle at charging station: Charging fee = (power amount) * (power consumed when charging) * (charging reduction rate), Nth vehicle at charging station: Charging fee = (power amount) * (power consumed when charging) * (charge reduction rate)^(N).

In order to calculate the amount more accurately, it can be calculated using the following calculation formula through continuous communication between the car and the charging station.

Charging fee = (electricity amount) * (power consumed when charging). In the case of charging power consumption, it is difficult to calculate accurately because the amount is calculated from the wireless charging power of other vehicles + charging station power.

Therefore, since the power charge amount = (charging efficiency coefficient for each vehicle)*(power consumed when charging), the charging fee can be finally calculated as charging charge = (power amount)*(power charge amount)/(charging efficiency coefficient for each vehicle). there is.

Although the present invention has been described in detail through representative embodiments above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. will be. Therefore, the scope of rights of the present invention should not be limited to the described embodiments, but should be determined not only by the patent claims described later, but also by all changes or modified forms derived from the claims and the concept of equivalents.

Claims (7)

In a door-to-door inductive wireless charging system that charges a vehicle by receiving power from a charging station,
a charging module for charging the vehicle from the charging station by providing a resonating body composed of a primary resonating body on one side of the door of the vehicle and a secondary resonating body on the other side; and
a motor unit that adjusts the position or angle of a charging module that supplies inductive power between the resonant body of the vehicle and the resonant body of another vehicle adjacent to the vehicle;
An intermediary that can wirelessly transmit power between each vehicle when the vehicle moves away from other adjacent vehicles by a predetermined distance or more; Including,
The vehicle receives power from the charging station and can continuously transmit and receive power to other adjacent vehicles using the resonant body,
The intermediary is,
A touch sensor installed in the parking space area of the vehicle and consisting of a bump to detect whether the vehicle is parked; or
a weight sensor installed below the parking space of the vehicle to detect the weight of the vehicle; A door-to-door inductive wireless charging system comprising at least one of the following.
According to claim 1,
A door-to-door inductive wireless charging system, wherein the charging module can be connected to the charging station by wire when another adjacent vehicle moves away by a predetermined distance or more.
delete delete delete delete delete