KR101927670B1 - Wireless charging device and method that automatically changing mode - Google Patents

Abstract

Provided are a wireless device and a wireless method for automatically changing a charging mode which can have higher charging efficiency. According to the present invention, the wireless charging device for automatically changing a charging mode comprises: a charging mode checking module for checking whether wireless charging for wirelessly charging a terminal is currently performed in a high-speed mode or in a low-speed mode; a terminal operation determining module for determining whether a screen is turned on or an application is operated while the terminal is charged; a charging mode change determining module for determining whether a charging mode should be changed based on a checked current charging mode and an operation state of the terminal; and a charging mode changing module for changing the charging mode to other modes different from the current charging mode if the charging mode should be changed according to a determination result.

Description

Technical Field [0001] The present invention relates to a wireless charging device and a method for automatically changing a charging mode,

The present invention relates to a wireless charging apparatus and method, and more particularly, to a charging mode automatic changing wireless charging apparatus and method in which a charging mode is automatically changed according to a state of a terminal.

A high-speed wireless charger that is generally sold will determine whether to charge at a high speed (fast charge mode) or at a low speed (low speed charge mode) before charging the terminal, until the terminal is fully charged in the determined charge mode Charging is performed. Terminals that support wireless charging using such a high speed wireless charger are set to have a high receiver output voltage (typically 9 to 10V) in the fast charging mode and a low receiver output voltage (typically 5V) in the low charging mode, .

Since the high-speed charging mode uses a high output voltage, a relatively low current is used in the low-speed charging mode in the process of generating the same output.

However, since the high-speed charge mode uses a high output voltage, there is also a calorific value depending on the conversion efficiency in transforming a high voltage to a low voltage for charging the battery.

That is, in the high-speed charge mode, the heat generation is reduced using the low current in the high output operation and the heat generation in the voltage enhancement process is larger than the reduced heat due to the low current in the low output operation.

On the other hand, terminals supporting wireless charging control the battery charging current according to the state in consideration of the heat generation amount or the temperature of the battery. When the heat increases or the battery temperature increases, the terminals are formed so as to prevent the heat generation or the temperature from increasing by controlling the charging speed or the charging current to decrease for safety.

Particularly, an algorithm for reducing a charging current is applied to some terminals when a terminal is operated such that a screen is turned on during wireless charging or an application is executed.

However, when such an algorithm operates, in the fast charge mode, as the charge current decreases, the power generated for charging decreases, which causes the heat generated during the voltage drop to increase more than the heat that decreases due to the low current There is a problem that the amount of heat generated in the entire system increases and the charging speed is slower than the low-speed charging speed.

KR 2014-0060541A

In order to solve the problems of the related art as described above, it is an object of the present invention to provide a charging mode automatic changing wireless charging apparatus and method which can automatically change the charging mode to have higher charging efficiency.

According to an aspect of the present invention, there is provided a wireless charging apparatus for automatically changing a charging mode. Wherein the charging mode automatic changing wireless charging apparatus includes a charging mode confirmation module for confirming whether wireless charging for charging the terminal wirelessly is currently performed in a high speed mode or a low speed mode; A terminal operation judging module for judging whether the terminal is turning on a screen during charging or an application is operating; A charging mode change determining module that determines whether a change of the charging mode is required based on the determined current charging mode and whether or not the terminal operates; And a charge mode change module for changing the charge mode to a mode different from the current charge mode if it is determined that the charge mode change is necessary.

The terminal operation determination module can confirm whether the charge current has decreased to a predetermined value or less from the terminal.

The charging mode change determination module may calculate and compare the calorific value of the current charging mode and the calorific value of the other mode.

The amount of heat generated may be a sum of a coil loss due to the charging current flowing through the coil provided for the wireless charging and an amount of conversion loss in the process of reducing the voltage of the high speed mode or the low speed mode to the charging voltage.

The charge mode change module may determine that the charge mode should be changed when the calorific value of the current charge mode is higher than the calorific value of the other mode.

According to an aspect of the present invention, a charging mode automatic changing wireless charging method is provided. Wherein the charging mode automatic changing wireless charging method comprises: a current charging mode checking step of checking whether wireless charging for charging the terminal wirelessly is currently performed in a high speed mode or a low speed mode; Determining whether the terminal is in operation to determine whether the terminal is turning on a screen during charging or an application is operating; Determining whether the charging mode is changed based on whether the current charging mode and the terminal operation are confirmed; And changing a charging mode to a mode different from the current charging mode when it is determined that the charging mode change is necessary.

The step of determining whether or not the terminal operates may determine whether the charge current has decreased from a predetermined value or less.

The determining whether to change the charging mode may calculate and compare a calorific value of the current charging mode and a calorific value of the other mode.

The amount of heat generated may be a sum of a coil loss due to the charging current flowing through the coil provided for the wireless charging and an amount of conversion loss in the process of reducing the voltage of the high speed mode or the low speed mode to the charging voltage.

The determining whether or not to change the charging mode may determine that the charging mode needs to be changed when the calorific value of the current charging mode is higher than the calorific value of the other mode.

The automatic charging mode wireless charging apparatus and method according to an embodiment of the present invention are capable of preventing a safety accident due to an increased heat due to operation of the terminal in the fast charging mode.

Also, the apparatus and method for automatically changing the charging mode according to an embodiment of the present invention can increase the charging efficiency which is reduced as the terminal operates in the fast charging mode.

1 is a block diagram of a charging mode automatic changing wireless charging apparatus according to an embodiment of the present invention.
FIG. 2 is a graph showing a calorific value according to charging power in a fast charging mode and a low-speed charging mode of a charging mode automatic changing wireless charging apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating a charging mode automatic changing wireless charging method according to an embodiment of the present invention.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

FIG. 1 is a block diagram of a charging mode automatic rechargeable wireless charging apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram of a rechargeable mode automatic rechargeable wireless charging apparatus according to an exemplary embodiment of the present invention, The amount of heat generated due to the charging power of the battery.

1, the automatic charging mode wireless charging apparatus 100 includes a charging mode confirmation module 110, a terminal operation determination module 120, a charging mode change determination module 130, And a charge mode change module 140. [

The charging mode confirmation module 110 checks which mode the charging device 100 is charging in the process of wirelessly charging the terminal. The wireless charging device 100 operates in a fast charging mode or a low-speed charging mode to wirelessly charge the terminal. The fast charge mode typically produces a high output of 9V to 10V at the receiver, where the receiver sends a specific digital communication signal to the wireless charging device to request a high output voltage. That is, for example, the charging mode check module can check whether the wireless charging device is charging in the fast charging mode or wirelessly charging the terminal in the low-speed charging mode through the fast charging mode request digital communication signal received from the receiver.

The terminal operation determination module 120 determines whether the terminal is in operation while the terminal is being charged through the wireless charging device 100 such that the screen is turned on or the application is running.

The terminals that support wireless charging and are wirelessly charged through the wireless charging device 100 control the charging current of the battery according to the state in consideration of the heating value or the temperature of the battery. When the heat increases or the battery temperature increases, the terminals are formed so as to prevent the heat generation or the temperature from increasing by controlling the charging speed or the charging current to decrease for safety.

Particularly, an algorithm for reducing a charging current is applied to some terminals when a terminal is operated such as a screen is turned on during wireless charging or an application is executed.

Accordingly, the terminal operation determination module 120 can determine whether the terminal is in operation by checking whether the charge current supplied to the terminal is decreasing below a predetermined value.

The charging mode change determination module 130 determines whether the charging mode change of the wireless charging device 100 is necessary. The charging mode change determination module 130 determines whether to change the charging mode using the current charging mode and the terminal operation state, which are confirmed through the charging mode checking module 110 and the terminal operation determining module 120. [

The charging mode change determination module 130 compares the calorific value of the current charging mode with the calorific value of the other charging mode. The amount of heat generated by each mode can be expressed by the following Equation 1 through the resistance value of the coil and the voltage conversion efficiency.

In the following Tables 1 and 2, the amount of heat generated according to the charging power in the low-speed charging mode and the fast charging mode according to the embodiment of the present invention is shown, and the total amount of heat generated in relation to the charging power is shown in the graph of FIG.

Low-speed charging mode (5V) Coil resistance 0.3 Conversion efficiency 0.95 Charging power Coil current Coil loss Conversion loss Total calorific value One 0.2 0.012 0.05 0.062 2 0.4 0.048 0.1 0.148 3 0.6 0.108 0.15 0.258 4 0.8 0.192 0.2 0.392 5 1.0 0.3 0.25 0.55 6 1.2 0.432 0.3 0.732 7 1.4 0.588 0.35 0.938 8 1.6 0.768 0.4 1.168 9 1.8 0.972 0.45 1.422

Fast Charge Mode (9V) Coil resistance 0.3 Conversion efficiency 0.90 Charging power Coil current Coil loss Conversion loss Total calorific value One 0.11 0.0037 0.1 0.1037 2 0.22 0.0148 0.2 0.2148 3 0.33 0.0333 0.3 0.3333 4 0.44 0.0593 0.4 0.4593 5 0.56 0.0926 0.5 0.5926 6 0.67 0.1333 0.6 0.7333 7 0.78 0.1815 0.7 0.8815 8 0.89 0.2370 0.8 1.0370 9 1.00 0.3000 0.9 1.2000

Referring to Tables 1 and 2, the low-speed charge mode is provided with a voltage of 5 V, and the fast-charge mode is provided with a voltage of 9 V. The conversion efficiency of the slow charging mode is 0.95, and the conversion efficiency of the fast charging mode is 0.9. In both charging modes, the coil resistance is equal to 0.3.

Comparing the slow charge mode and the fast charge mode, the current flowing in the coil in the fast charge mode at all charge powers has a lower value than the current flowing in the coil in the slow charge mode. Therefore, the amount of heat generated in the coil due to the coil resistance appears to be lower in the fast charge mode than in the slow charge mode.

In addition, as for the conversion loss due to the voltage drop, since the voltage drop in the low-speed charging mode is lower than the voltage drop in the fast-charging mode, the amount of heat generated in the voltage drop process is lower than that in the fast- .

On the other hand, the current flowing in the coils of the low-speed charging mode and the fast-charging mode appears as 5/9 times faster than the low-speed charging mode, and the conversion loss is twice as fast as that of the low-speed charging mode. Therefore, the total calorific value of the two loss values appears to cross each other at a certain point.

Referring to Tables 1, 2 and 2, the point where the total heating value of the low-speed charging mode intersects with the total heating value of the fast-charging mode is when 6 W of the charging power is supplied. When a charging power of less than 6 W is supplied, the fast charging mode generates more heat than the slow charging mode, and conversely, when the charging power is higher than 6 W, the slow charging mode generates more heat than the fast charging mode.

Accordingly, the charge mode change determination module 130 can calculate the charge amount of the current charge mode and the heat amount of the other mode, respectively, and compare them, thereby determining the charge mode having the lower heat amount.

Finally, the charge mode change module 140 changes the charge mode when the charge mode having the lower heat value determined by the charge mode change determination module 130 is not the current charge mode.

Accordingly, the charging mode automatic changing wireless charging apparatus 100 according to an embodiment of the present invention calculates the heating value for each charging mode and actively charges the terminal by changing the charging mode by using the heating value It is possible to have advantages and effects that can be achieved.

Meanwhile, FIG. 3 is a flowchart illustrating a charging mode automatic changing charging method according to an embodiment of the present invention. Hereinafter, the present method is described as being performed by using the charging mode automatic changing wireless charging apparatus 100 according to an embodiment of the present invention. However, the present invention is not limited thereto, Or < / RTI >

Referring to FIG. 3, the charging mode automatic changing wireless charging method 300 according to an embodiment of the present invention includes a step S310 of checking the current charging mode, a step S320 of determining whether the terminal is operating, (S330), and performing a charging mode change (S340).

First, the charging mode automatic changing wireless charging apparatus confirms the charging mode currently charging the terminal (step S310). The wireless charging device operates in a fast charging mode or a slow charging mode to wirelessly charge the terminal. The fast charge mode typically produces a high output of 9V to 10V at the receiver, where the receiver sends a specific digital communication signal to the wireless charging device to request a high output voltage. That is, for example, the charging mode check module can check whether the wireless charging device is charging in the fast charging mode or wirelessly charging the terminal in the low-speed charging mode through the fast charging mode request digital communication signal received from the receiver.

Next, the charging mode automatic changing wireless charging apparatus determines whether the terminal is currently operating or not (step S320).

The wireless charging device determines whether the terminal is in operation while the terminal is being charged, such as when the screen is turned on or an application is running.

The terminals that support wireless charging and are charged through the wireless charging device control the charging current of the battery according to the state in consideration of the heating value or the temperature of the battery. When the heat increases or the battery temperature increases, the terminals are formed so as to prevent the heat generation or the temperature from increasing by controlling the charging speed or the charging current to decrease for safety.

Particularly, an algorithm for reducing a charging current is applied to some terminals when a terminal is operated such as a screen is turned on during wireless charging or an application is executed.

Accordingly, the wireless charging device can determine whether the terminal is in operation by checking whether the charging current supplied to the terminal is decreasing below a predetermined value.

Next, the charging mode automatic changing wireless charging apparatus determines whether the charging mode should be changed (step S330).

The wireless charging device determines whether to change the charging mode by using the current charging mode and whether the terminal is operated or not through steps S310 and S320.

The wireless charging device compares the calorific value of the current charging mode with the calorific value of the other charging modes. At this time, the calorific power for each charging mode can be obtained as described above through Equation 1, Table 1, Table 2, and FIG.

Therefore, the wireless charging apparatus can calculate and compare the calorific value of the current charging mode and the calorific value of the other mode, respectively, to determine which mode the charging mode having the lower calorific value is.

Lastly, the charging mode automatic changing wireless charging device performs the charging mode changing if necessary (step S340).

The wireless charging device performs the charging mode change when the charging mode having the lower heating value determined in step S330 is not the current charging mode.

Accordingly, the charging mode automatic changing wireless charging method according to an embodiment of the present invention can calculate the heating amount for each charging mode and actively change the charging mode by using the calorific power to perform wireless charging of the terminal with higher efficiency Advantages and effects.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

100: Automatic change of charging mode Wireless charging device
110: Charging mode confirmation module 120: Terminal operation determination module
130: Charging mode change judgment module 140: Charging mode changing module

Claims (10)

A charging mode confirmation module for confirming whether wireless charging for charging the terminal wirelessly is currently performed in a high speed mode or in a low speed mode;
A terminal operation judging module for judging whether the terminal is turning on a screen during charging or an application is operating;
A charging mode change determining module that determines whether a change of the charging mode is required based on the determined current charging mode and whether or not the terminal operates; And
And a charge mode change module for changing the charge mode to a mode different from the current charge mode if it is determined that the charge mode change is necessary,
Wherein the terminal operation determination module determines whether the charge current has decreased to a predetermined value or less from the terminal,
Wherein the charging mode change determination module calculates and compares the calorific value of the current charging mode with the calorific value of the other mode. delete delete The method according to claim 1,
Wherein the heating amount is a sum of a coil loss amount due to the charging current flowing through the coil provided for the wireless charging and a conversion loss amount in the process of dropping the voltage of the high speed mode or the low speed mode to the charging voltage, . The method according to claim 1,
Wherein the charge mode change determination module determines that the change of the charge mode is necessary when the calorific value of the current charge mode is higher than the calorific value of the other mode. A current charging mode checking step of checking whether wireless charging for charging the terminal wirelessly is currently performed in a high speed mode or in a low speed mode;
Determining whether the terminal is in operation to determine whether the terminal is turning on a screen during charging or an application is operating;
Determining whether the charging mode is changed based on whether the current charging mode and the terminal operation are confirmed; And
And changing a charging mode to a mode different from the current charging mode when it is determined that the charging mode change is necessary,
The step of determining whether or not the terminal operates determines whether a charge current has decreased to a predetermined value or less from the terminal,
Wherein the determining whether the charging mode is to be changed includes calculating and comparing a calorific value of the current charging mode and a calorific value of the other mode. delete delete The method according to claim 6,
Wherein the amount of heat generated is a sum of a coil loss amount due to the charging current flowing through a coil provided for the wireless charging and a conversion loss amount in a process of dropping the voltage of the high speed mode or the low speed mode to a charging voltage, . The method according to claim 6,
Wherein the charging mode change determining step determines that the charging mode needs to be changed when the calorific value of the current charging mode is higher than the calorific value of the other mode.

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