KR20190127096A - Method and apparatus for charging a battery - Google Patents

Abstract

According to an embodiment, the present invention relates to a battery charging method and an apparatus thereof, for monitoring voltage of a battery and applying a different control signal to a module according to the voltage of the battery to perform charging on the battery. More specifically, the battery charging method and the apparatus thereof perform charging on the battery while controlling the voltage applied to one of a primary coil and a secondary coil included in a transformer according to the control signal.

Description

Battery charging method and apparatus {Method and apparatus for charging a battery}

The present disclosure discloses a method and apparatus for charging a battery. In particular, a method and apparatus for charging a battery through a transformer is disclosed.

The United Nations Framework Convention on Climate Change is compulsory for mandatory reductions in greenhouse gases for Korea and other countries around the world. Accordingly, the Korean government has taken various measures to reduce greenhouse gases as a policy. In particular, the government has imposed various regulations on automobiles, one of the biggest sources of greenhouse gas emissions, and in the automotive industry, electric vehicles (EVs), hybrid electric vehicles (HEVs), and plug-ins are responding in response. The company is accelerating the development of a Plug-in Hybrid Electric Vehicle (PHEV).

Electric vehicles and the like accumulate electrical energy in a battery, which is a secondary battery, and convert the electrical energy into power energy using a motor. At this time, the electric energy is charged to the battery by the rapid charging method of directly applying the DC high voltage power (about 50kW or more) directly to the battery and by the slow application of AC power (approximately 3 ~ 6kW) having a commercial AC voltage. There is a charging method.

However, the voltage of the electric power usually found in a normal home and the voltage of the battery mounted in an electric vehicle differ. Therefore, in order to commercialize and practically use environmentally friendly electric vehicles, a charging device capable of efficiently converting commercial AC power obtained at home into high voltage DC power, a so-called "On-Board Charger; OBC) "continues to be developed.

The present disclosure can provide a method and apparatus for more efficiently distributing voltage to charge a battery. For example, a method and apparatus for more efficiently charging a battery by distributing the voltage according to the voltage of the battery may be provided. The technical problem to be solved is not limited to the technical problems as described above, and various technical problems may be further included within the scope apparent to those skilled in the art.

The battery charging method according to the first aspect comprises the steps of: monitoring a voltage of the battery connected to the secondary coil side of a transformer comprising a primary coil and a secondary coil; Applying a control signal determined according to the voltage of the battery to a module connected to the interruption of the primary coil composed of a first coil and a second coil connected in series; And charging the battery while maintaining a voltage applied to the second coil at a predetermined value or less according to the control signal.

In the applying of the control signal, when the voltage of the battery is greater than or equal to a preset value, the control signal may be applied to request to maintain the voltage applied to the second coil to be less than or equal to a preset value.

The module may also include a FET.

In addition, the module may include a first FET and a second FET, and the first FET and the second FET may be connected in series.

In addition, a direction of the diode included in the first FET and a direction of the diode included in the second FET may be opposite to each other.

The charging of the battery may include applying a high signal to the first FET and the second FET when the voltage of the battery is greater than or equal to a preset value, thereby applying a voltage to the second coil. Charging to the battery may be performed while maintaining a value below a preset value.

The charging of the battery may include applying a low signal to the first FET and the second FET when the voltage of the battery is less than a predetermined value, thereby providing the first FET and the first FET. The battery can be charged while keeping the 2 FETs open.

In addition, the battery charging apparatus according to the second aspect includes a receiver for receiving a voltage of the battery connected to the secondary coil side of a transformer comprising a primary coil and a secondary coil; A module connected to the interruption of the primary coil consisting of a first coil and a second coil connected in series; And monitoring a voltage of a battery received by the receiver, applying a control signal determined according to the voltage of the battery to the module, and maintaining a voltage applied to the second coil below a preset value according to the control signal. It may include a processor for performing a charge on the battery.

In addition, the module includes a first FET and a second FET, the first FET and the second FET is connected in series, the direction of the diode included in the first FET and the diode included in the second FET The directions of may be opposite to each other.

In addition, when the voltage of the battery is greater than or equal to a predetermined value, the processor applies a high signal to the first FET and the second FET, while maintaining the voltage applied to the second coil below a predetermined value. Charging the battery may be performed.

The third aspect may also provide a computer readable recording medium having recorded thereon a program for executing the method of the first aspect on a computer.

The present disclosure discloses a method and apparatus for charging a battery. In particular, a method and apparatus for charging a battery through a transformer is disclosed.

1 is a view illustrating an example in which a battery charging device according to an embodiment is used.
2 is a block diagram illustrating an example of a configuration of a battery charging apparatus according to an exemplary embodiment.
3 is a block diagram illustrating an example in which a battery charging apparatus operates according to an exemplary embodiment.
FIG. 4 is a block diagram illustrating an example in which the battery charging device applies a different control signal for each section and operates when the battery voltage is low, according to an exemplary embodiment.
FIG. 5 is a block diagram illustrating an example in which the battery charging device operates by applying a predetermined control signal when a battery voltage is low, according to an embodiment.
6 is a block diagram illustrating an example in which a battery charging device operates when a battery voltage is high, according to an exemplary embodiment.
7 is a block diagram illustrating an example in which a battery charging apparatus including a plurality of modules operates according to an exemplary embodiment.
FIG. 8 is a flowchart illustrating an example in which a battery charging device performs charging on a battery while maintaining a voltage applied to a second coil to a preset value or less according to a control signal.

The terminology used in the embodiments is a general term that has been widely used as much as possible in consideration of the functions of the present invention, but may vary according to the intention or precedent of a person skilled in the art, the emergence of new technology, and the like. In addition, in certain cases, there is also a term arbitrarily selected by the applicant, in which case the meaning will be described in detail in the description of the invention. Therefore, the terms used in the present invention should be defined based on the meanings of the terms and the contents throughout the present invention, rather than the names of the simple terms.

When a part of the specification is said to "include" any component, this means that it may further include other components, except to exclude other components unless otherwise stated. In addition, as described in the specification Wealth ”,“… Module ”means a unit for processing at least one function or operation, which may be implemented in hardware or software, or a combination of hardware and software.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art may easily implement the present invention. As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.

Hereinafter, with reference to the drawings will be described embodiments of the present invention;

1 is a view illustrating an example in which the battery charging device 100 according to an embodiment is used.

In the charging device for an electric vehicle according to an embodiment, a boost circuit capable of only voltage boosting may be used for a power factor correction (PFC) circuit. In addition, the output voltage Vdc of the PFC circuit may be greater than or equal to a predetermined value (for example, 380V). However, depending on the state of charge, the voltage of the battery may vary in a certain range (eg, DC 200 ~ 450V). In the charging apparatus for an electric vehicle according to an embodiment, the on / off period of the PWM signal input to the DC / DC converter (duty ratio (Duty) so that the charging voltage Vo almost matches the voltage of the battery within a predetermined range. ratio)).

Meanwhile, the charging device for an electric vehicle according to an embodiment may mainly use a full bridge converter as a DC / DC converter. In addition, according to an embodiment, the device parameters of the passive device component included in the full bridge converter may be designed to maximize the efficiency of the charging system when the duty ratio of the PWM signal input to the DC / DC converter is the maximum.

The basic circuit of the high capacity OBC according to an embodiment may be a half bridge LLC resonant converter. Alternatively, the actual circuit may be composed of a three-phase circuit in order to realize high capacity fast charging. In addition, the inverter is based on a three-phase circuit, and an Insulated Gate Bipolar mode Transistor (IGBT) in which a body diode is embedded may be driven by a switch to operate DC to AC. The inverter may convert the voltage from the high capacity battery into alternating current and supply it to the vehicle motor.

In particular, in the case of a single stage PFC in the OBC (On Board Charger), the reverse voltage may be designed to be maintained above a predetermined value so that the ripple current is maintained within a predetermined range. In addition, according to an embodiment, the battery charging device 100 may be included in the OBC. Hereinafter, a detailed operation of the battery charging device 100 will be described.

2 is a block diagram illustrating an example of a configuration of a battery charging apparatus 100 according to an exemplary embodiment.

As shown in FIG. 2, the battery charging device 100 may include a receiver 110, a processor 120, and a module 130.

However, it will be understood by those skilled in the art that other general-purpose components other than the components shown in FIG. 2 may be further included in the battery charging apparatus 100. For example, the battery charging device 100 may further include a power source 140 or a battery 150. Or according to another embodiment, it will be understood by those skilled in the art that some of the components shown in FIG. 2 may be omitted.

The receiver 110 according to an embodiment may receive the voltage of the battery 150. The transformer included in the battery charging apparatus 100 according to an embodiment may include a primary coil and a secondary coil, the module 130 may be connected to the primary coil side, and the battery 150 may be connected to the secondary coil side. have.

Module 130 according to an embodiment may be connected to the interruption of the primary coil composed of the first coil and the second coil connected in series. For example, one connection line of two connection lines included in the module 130 may be connected to a point at which the first coil and the second coil are connected.

The processor 120 according to an embodiment monitors the voltage of the battery received by the receiver, applies a control signal determined according to the voltage of the battery to the module, and according to the control signal, the voltage applied to the second coil is less than or equal to a preset value. You can charge the battery while keeping it at.

3 is a block diagram illustrating an example in which the battery charging apparatus 100 operates according to an exemplary embodiment.

As shown in FIG. 3, the battery charging device 100 may include a receiver 110, a processor 120, a module 130, a power supply 140, and a transformer 300.

However, it will be understood by those skilled in the art that other general-purpose components other than the components shown in FIG. 3 may be further included in the battery charging apparatus 100. For example, the battery charging device 100 may further include a battery 150. Alternatively, according to another embodiment, some of the elements shown in FIG. 3 may be omitted by those of ordinary skill in the art.

3 to 6, the winding ratio between the primary coils 310 and 320 and the secondary coil 330 is 2: 1, and the winding ratio between the first coil 310 and the second coil 320 is shown in FIG. The case of 13: 7 is disclosed, but the winding ratio is only one embodiment, and the battery charging device 100 may operate with another winding ratio.

The receiver 110 according to an embodiment may receive the voltage of the battery 150. Referring to FIG. 3, the transformer 300 included in the battery charging apparatus 100 according to an embodiment includes the primary coils 310 and 320 and the secondary coil 330, and the module 130 is 1. On the side of the secondary coils 310 and 320, the battery 150 may be connected to the secondary coil 330 side.

The transformer 300 according to an embodiment may include the primary coils 310 and 320 and the secondary coil 330. In addition, the primary coils 310 and 320 may include a first coil 310 and a second coil 320. The module 130 according to an embodiment may be connected to the interruption of the primary coils 310 and 320 including the first coil 310 and the second coil 320 connected in series. For example, one connection line of two connection lines included in the module 130 may be connected to a point at which the first coil 310 and the second coil 320 are connected.

The receiver 110 according to an embodiment may receive the voltage of the battery 150 and transmit it to the processor 120. Although the receiver 110 is disclosed in a separate configuration in FIG. 3, the receiver 110 may be included in one configuration of the processor 120 according to an implementation method.

The module 130 according to an embodiment may operate according to a control signal applied by the processor 120. For example, the module 130 may be shorted when the processor 120 applies a high signal and open when the processor 120 applies a low signal. According to an embodiment, the meaning of open may be open in one direction or open in both directions. According to an embodiment, when the module 130 is shorted according to a control signal applied by the processor 120, both terminals of the second coil 320 may be shorted. In this case, the voltage across both terminals of the second coil 320 may be maintained below a preset value (for example, 0.1V), and ideally, the voltage across both terminals of the second coil 320 may be 0V. Can be. However, the voltage across both terminals of the second coil 320 may not be zero due to the resistance of the conductive wires.

The processor 120 according to an embodiment monitors the voltage of the battery 150 received by the receiver 110, applies a control signal determined according to the voltage of the battery 150 to the module 130, and applies the control signal to the control signal. Therefore, the battery 150 may be charged while maintaining the voltage applied to the second coil 320 at a predetermined value or less.

The processor 120 according to an embodiment may monitor the voltage of the battery 150. The voltage of the battery 150 may be received through the receiver 110. The receiver 110 according to an embodiment may be included in the processor 120. The processor 120 may determine whether the voltage of the battery 150 is greater than or equal to a preset value. For example, the processor 120 may determine whether the voltage of the battery 150 is greater than or equal to 280V.

The processor 120 according to an embodiment may apply a control signal determined according to a monitoring result of the voltage of the battery 150 to the module 130. For example, when the voltage of the battery 150 is greater than or equal to the preset value, the processor 120 may apply a control signal to the module 130 requesting to maintain the voltage applied to the second coil 320 to be less than or equal to the preset value. Can be. As another example, when the voltage of the battery 150 is less than a preset value, the processor 120 may apply a control signal to the module 130 requesting not to control the voltage applied to the second coil 320. For example, the processor 120 applies a high signal to the module 130 when the voltage of the battery 150 is greater than or equal to a preset value, and applies a low signal to the module 130 when the voltage of the battery 150 is less than the preset value. 130).

The module 130 according to an embodiment may include one or more devices (eg, a field effect transistor (FET)). For example, module 130 may include two FETs. In this case, the first FET and the second FET may be connected in series. In addition, the direction of the diode included in the first FET and the direction of the diode included in the second FET may be opposite to each other.

The processor 120 according to an embodiment applies a high signal to the first FET and the second FET included in the module 130 when the voltage of the battery 150 is greater than or equal to a predetermined value (for example, about 280V) to form a second coil. The battery 150 may be charged while maintaining the voltage applied to the 320 below a preset value.

The processor 120 according to an embodiment applies the low signal to the first FET and the second FET included in the module 130 when the voltage of the battery 150 is less than a preset value (for example, about 280 V) to the second coil. The battery 150 may be charged without additional control of the voltage applied to the 320. In this case, charging of the battery 150 may be performed while the first FET and the second FET remain open.

4 is a block diagram illustrating an example in which the battery charging apparatus 100 operates by applying different control signals for each section when the voltage of the battery 150 is low, according to an exemplary embodiment.

Referring to FIG. 4, an example in which the battery charging device 100 operates when the voltage of the battery 150 is less than a preset value (for example, 200 V to 280 V) is illustrated. When the voltage of the battery 150 is less than the preset value, the processor 120 may monitor the voltage of the battery 150 and apply a first control signal to the module 130. In more detail, a signal applied to the first FET Q5 and the second FET Q6 may be a first control signal. As shown in FIG. 4, the first control signal may be high in the first section 410 and low in the second section 420. When the first control signal is applied to the module 130, the module 130 may operate in the open state in the second period 420 where the PWM is low. Therefore, the reverse voltage applied to the inductor 350 by the battery 150 may be a voltage corresponding to twice the voltage output from the battery 150. For example, when the voltage of the battery 150 is about 200V, the reverse voltage applied to the inductor 350 may be about 400V. Therefore, even when the voltage of the battery 150 is at the lowest level (eg, 200V), the reverse voltage applied to the inductor 350 may be equal to or greater than a preset value (eg, 340V).

Even when the voltage of the battery 150 is low, since the winding ratio of the transformer 300 operates at 2: 1 in the second section 420, the reverse voltage applied to the inductor 350 may be maintained above the preset value. Therefore, the ripple current does not diverge or disappear, and can be maintained within a predetermined range.

In addition, the direction of the diode included in the first FET Q5 and the direction of the diode included in the second FET Q6 may be opposite to each other. Since the direction of the diode included in the first FET Q5 and the direction of the diode included in the second FET Q6 are opposite to each other, a low signal is applied to the first FET Q5 and the second FET Q6. Module 130 may operate in an open state.

5 is a block diagram illustrating an example in which the battery charging apparatus 100 operates by applying a predetermined control signal when the voltage of the battery 150 is low, according to an exemplary embodiment.

Referring to FIG. 5, an example in which the battery charging device 100 operates when the voltage of the battery 150 is less than a preset value (for example, 200 V to 280 V) is illustrated. When the voltage of the battery 150 is less than a preset value, the processor 120 may monitor the voltage of the battery 150 and apply a second control signal to the module 130. In more detail, a signal applied to the first FET Q5 and the second FET Q6 may be a second control signal. As can be seen in FIG. 5, the second control signal may be low in both the first section 410 and the second section 420. When the second control signal is applied to the module 130, the module 130 may operate in an open state in the first section 410 and the second section 420. Therefore, the reverse voltage applied to the inductor 350 by the battery 150 may be a voltage corresponding to twice the voltage output from the battery 150. For example, when the voltage of the battery 150 is about 200V, the reverse voltage applied to the inductor 350 may be about 400V. Therefore, even when the voltage of the battery 150 is at the lowest level (eg, 200V), the reverse voltage applied to the inductor 350 may be equal to or greater than a preset value (eg, 340V).

Even when the voltage of the battery 150 is low, since the winding ratio of the transformer 300 operates at 2: 1 in the entire section, the reverse voltage applied to the inductor 350 may be maintained above the preset value, and thus, the ripple current Can be maintained within a predetermined range without diverging or extinction.

In addition, the direction of the diode included in the first FET Q5 and the direction of the diode included in the second FET Q6 may be opposite to each other. Since the direction of the diode included in the first FET Q5 and the direction of the diode included in the second FET Q6 are opposite to each other, a low signal is applied to the first FET Q5 and the second FET Q6. Module 130 may operate in an open state.

6 is a block diagram illustrating an example in which the battery charging apparatus 100 operates when the voltage of the battery 150 is high, according to an exemplary embodiment.

Referring to FIG. 5, an example in which the battery charging device 100 operates when the voltage of the battery 150 is greater than or equal to a preset value (for example, 280V to 450V) is illustrated. When the voltage of the battery 150 is greater than or equal to a preset value, the processor 120 may monitor the voltage of the battery 150 and apply a third control signal to the module 130. In detail, the signals applied to the first FET Q5 and the second FET Q6 may be third control signals. As can be seen in FIG. 6, the third control signal may be high in both the first section 410 and the second section 420. When the third control signal is applied to the module 130, the module 130 may operate in a shorted state in the first section 410 and the second section 420. Therefore, the reverse voltage applied to the inductor 350 by the battery 150 may be a voltage corresponding to 1.3 times the voltage output from the battery 150. For example, when the voltage of the battery 150 is about 450V, the reverse voltage applied to the inductor 350 may be about 585V. Therefore, even when the voltage of the battery 150 is at the highest level (eg, 450V), the reverse voltage applied to the inductor 350 may be equal to or less than a preset value (eg, 585V).

When the voltage of the battery 150 is high, since the winding ratio of the transformer 300 operates at 1.3: 1 in the entire section, the reverse voltage applied to the inductor 350 may be maintained below a preset value, and thus, The maximum voltage value taken can be reduced. Therefore, the maximum value of the reverse voltage that must withstand at each device (eg, Q1 to Q4) can be reduced. For example, when the maximum voltage of the battery 150 is 450V, when there is no module 130, the maximum voltage output from the primary coil of the transformer 300 is 900V, but when the module 130 is present, the transformer 300 The maximum voltage output from the primary coil of) may be 585V.

Therefore, when the module 130 is included, since the specifications required by the elements included in the battery charging device 100 may be lowered, it is possible to implement the battery charging device 100, PFC and OBC at a lower cost.

7 is a block diagram illustrating an example in which the battery charging apparatus 100 including a plurality of modules 131 and 132 operates according to an exemplary embodiment.

As shown in FIG. 7, the battery charging device 100 includes a receiver 110, a processor 120, a first module 131, a second module 132, a power supply 140, and a transformer 300. can do.

However, it will be understood by those skilled in the art that other general-purpose components other than the components shown in FIG. 7 may be further included in the battery charging apparatus 100. For example, the battery charging device 100 may further include a battery 150. Alternatively, according to another embodiment, some of the components shown in FIG. 7 may be omitted by those of ordinary skill in the art.

In FIG. 7, the winding ratio between the primary coils 810, 820, 830, and the secondary coil 840 is 2: 1, and the first coil 810, the second coil 820, and the third coil according to an exemplary embodiment. Although the winding ratio between 830 is 10: 5: 5, the winding ratio is only an example, and the battery charging apparatus 100 may operate at different turns ratios.

As shown in FIG. 7, the primary coils 810, 820, and 830 may be divided into three or more coil units. In addition, the battery charging device 100 may operate through two or more modules 131 and 132.

The receiver 110 according to an embodiment may receive the voltage of the battery 150. Referring to FIG. 7, the transformer 300 included in the battery charging apparatus 100 according to an embodiment includes primary coils 810, 820, and 830 and a secondary coil 840, and includes a first module ( The 131 and the second module 132 may be connected to the primary coils 810, 820, and 830, and the battery 150 may be connected to the secondary coil 840.

Transformer 300 according to an embodiment may include a primary coil (810, 820, 830) and a secondary coil 840. In addition, the primary coils 810, 820, and 830 may include a first coil 810, a second coil 820, and a third coil 830. The first module 131 according to an embodiment may be connected to a node connecting the first coil 810 and the second coil 820 connected in series. One connection line of two connection lines included in the first module 131 may be connected to a point at which the first coil 810 and the second coil 820 are connected.

The second module 132 according to an embodiment may be connected to a node connecting the second coil 820 and the third coil 830 connected in series. One connection line of two connection lines included in the second module 132 may be connected to a point at which the second coil 820 and the third coil 830 are connected.

The receiver 110 according to an embodiment may receive the voltage of the battery 150 and transmit it to the processor 120. Although the receiver 110 is disclosed in a separate configuration in FIG. 8, the receiver 110 may be included in one configuration of the processor 120 according to an implementation method.

The first module 131 and the second module 132 according to an embodiment may operate according to a control signal applied by the processor 120. For example, the first module 131 and the second module 132 may be shorted when the processor 120 applies a high signal and open when the processor 120 applies a high signal. According to an embodiment, the meaning of open may be open in one direction or open in both directions.

According to an embodiment, when the first module 131 is shorted according to a control signal applied by the processor 120, both terminals of the second coil 820 and the third coil 830 may be shortened. In this case, voltages applied to both terminals of the second coil 820 and the third coil 830 may be maintained at or below a predetermined value (for example, 0.1V), and ideally, the second coil 820 and the third coil may be maintained. The voltage across both terminals of the 3 coil 830 may be 0V. However, the voltage applied to both terminals of the second coil 820 and the third coil 830 may not be zero due to the resistance of the conductive wire.

According to an embodiment, when the second module 132 is shorted according to a control signal applied by the processor 120, both terminals of the third coil 830 may be shortened. In this case, the voltage across both terminals of the third coil 830 may be maintained at or below a predetermined value (for example, 0.1V), and ideally, the voltage across both terminals of the third coil 830 may be 0V. Can be. However, the voltage across both terminals of the third coil 830 may not be zero due to the resistance of the conductive wires.

The processor 120 according to an embodiment monitors the voltage of the battery 150 received by the receiver 110, and monitors the voltage of the battery 150 in the first module 131 and / or the second module 132. The control signal determined according to the present invention is applied, and the battery 150 is charged while maintaining the voltage applied to the second coil 820 and the third coil 830 or the third coil 830 or less according to the control signal. Can be performed.

The processor 120 according to an embodiment may monitor the voltage of the battery 150. The voltage of the battery 150 may be received through the receiver 110. The receiver 110 according to an embodiment may be included in the processor 120. The processor 120 may determine whether the voltage of the battery 150 is greater than or equal to a preset value. For example, the processor 120 may determine whether the voltage of the battery 150 is greater than or equal to 280V. As another example, the processor 120 may determine whether the voltage of the battery 150 is greater than or equal to 350V.

The processor 120 according to an embodiment may apply a control signal determined according to a monitoring result of the voltage of the battery 150 to the first module 131 and / or the second module 132.

For example, when the voltage of the battery 150 is greater than or equal to the first value, the processor 120 may provide a control signal for requesting to maintain the voltages applied to the second coil 820 and the third coil 830 below a preset value. It may be applied to the first module 131. For example, when the voltage of the battery 150 is greater than or equal to the first value, the processor 120 may apply a high signal to the first module 131 and a low signal to the second module 132. As another example, when the voltage of the battery 150 is greater than or equal to the first value, the processor 120 may apply a high signal to both the first module 131 and the second module 132.

In another example, when the voltage of the battery 150 is between the first value and the second value, the processor 120 generates a second control signal requesting to maintain the voltage applied to the third coil 830 below a preset value. May be applied to the module 132. For example, when the voltage of the battery 150 is between the first value and the second value, the processor 120 applies a low signal to the first module 131 and a high signal to the second module 132. Can be.

As another example, when the voltage of the battery 150 is less than the second value, the processor 120 may provide a control signal for requesting to keep the first module 131 and the second module 132 open. And the second module 132. For example, when the voltage of the battery 150 is less than the second value, the processor 120 may apply a low signal to the first module 131 and the second module 132.

The first module 131 and the second module 132 according to an embodiment may each include one or more devices (eg, a field effect transistor (FET)). For example, the first module 131 and the second module 132 may each include two FETs. The 1-1 FET and the 1-2 FET included in the first module 131 may be connected in series. In addition, the direction of the diode included in the 1-1 FET and the direction of the diode included in the 1-2 FET may be opposite to each other. The 2-1 FET and the 2-2 FET included in the second module 132 may be connected in series. In addition, the direction of the diode included in the 2-1 FET and the direction of the diode included in the 2-2 FET may be opposite to each other.

The first value described above may be greater than the second value. In addition, the processor 120 may control the first module 131 and the second module 132 by comparing the voltage of the battery 150 with the first value and the second value.

For example, when the voltage of the battery 150 is greater than or equal to a first value (for example, about 350V), the processor 120 according to an embodiment may include a 1-1 FET and a 1-1 FET included in the first module 131. The battery 150 may be charged while being applied to the 1-2 FET while maintaining voltages applied to the second coil 820 and the third coil 830 below a predetermined value.

As another example, the processor 120 according to an embodiment may output a low signal when the voltage of the battery 150 is between a first value (eg, about 350V) and a second value (eg, about 250V). It is applied to the 1-1 FET and the 1-2 FET included in the first module 131 to keep the open state, and the high signal in the 2-1 FET and the second included in the second module 132 The battery 150 may be charged while being applied to the −2 FET while maintaining the voltage applied to the third coil 830 below a preset value.

In another example, the processor 120 according to an embodiment may transmit the low signal to the first-first FET and the first-first FET included in the first module 131 when the voltage of the battery 150 is less than the second value (eg, about 250V). The battery 150 may be applied to the 2-1 FET and the 2-2 FET included in the -2 FET and the second module 132 to operate the first module 131 and the second module 132 in an open state. Charging) may be performed.

FIG. 8 illustrates an example in which the battery charging apparatus 100 charges the battery 150 while maintaining a voltage applied to the second coil 320 to a predetermined value or less according to a control signal, according to an exemplary embodiment. Flowchart.

In operation S810, the battery charging apparatus 100 according to an embodiment monitors a voltage of a battery connected to a secondary coil side of a transformer including a primary coil and a secondary coil. For example, the battery charging device 100 may determine whether the voltage output from the battery is greater than or equal to a preset value.

In operation S820, the battery charging apparatus 100 according to an embodiment applies a control signal determined according to a voltage of a battery to a module connected to a stop of a primary coil composed of a first coil and a second coil connected in series.

For example, when the voltage of the battery is greater than or equal to the preset value, the battery charging device 100 may apply a control signal to the module requesting to maintain the voltage applied to the second coil to be less than or equal to the preset value. For example, the battery charging device 100 may apply a high signal to the first FET and the second FET.

As another example, when the voltage of the battery is less than the preset value, the battery charging device 100 may apply a control signal to the module requesting to operate in the open state. For example, the battery charging device 100 may apply a low signal to the first FET and the second FET.

In operation S830, the battery charging apparatus 100 according to an exemplary embodiment may charge the battery while maintaining a voltage applied to the second coil below a preset value according to a control signal.

For example, when the voltage of the battery is greater than or equal to the preset value, the battery charging device 100 applies a high signal to the first FET and the second FET to maintain the voltage applied to the second coil below the preset value. Charging may be performed.

As another example, when the voltage of the battery is less than the preset value, the battery charging device 100 applies a low signal to the first FET and the second FET to keep the module (the first FET and the second FET) open. Charging the battery can be performed.

On the other hand, the above-described method can be written as a program that can be executed in a computer, it can be implemented in a general-purpose digital computer to operate the program using a computer-readable recording medium. In addition, the structure of the data used in the above-described method can be recorded on the computer-readable recording medium through various means. The computer-readable recording medium may include a storage medium such as a magnetic storage medium (eg, ROM, RAM, USB, floppy disk, hard disk, etc.), an optical reading medium (eg, CD-ROM, DVD, etc.). do.

Those skilled in the art will appreciate that the present invention may be embodied in a modified form without departing from the essential characteristics of the above-described substrate. Therefore, the disclosed methods should be considered in descriptive sense only and not for purposes of limitation. The scope of the present invention is shown in the claims rather than the foregoing description, and all differences within the scope will be construed as being included in the present invention.

100: battery charging device 110: receiver
120: processor 130: module
131: first module 132: second module
140: power 150: battery
300: transformer 310, 320: primary coil
310: first coil 320: second coil
330: secondary coil 350: inductor
410: first section 420: second section
810: first coil 820: second coil
830: third coil 840: secondary coil
810, 820, 830: primary coil

Claims (10)

Monitoring a voltage of a battery connected to a secondary coil side of a transformer including a primary coil and a secondary coil;
Applying a control signal determined according to the voltage of the battery to a module connected to the interruption of the primary coil composed of a first coil and a second coil connected in series; And
And charging the battery while maintaining a voltage applied to the second coil to a predetermined value or less according to the control signal.
The method of claim 1,
Applying the control signal is
And when the voltage of the battery is greater than or equal to a predetermined value, applying a control signal to the module requesting to maintain the voltage applied to the second coil to be less than or equal to a predetermined value.
The method of claim 1,
And the module comprises a FET.
The method of claim 1,
The module comprises a first FET and a second FET, the first FET and the second FET being connected in series.
The method of claim 4, wherein
The direction of the diode included in the first FET and the direction of the diode included in the second FET is a direction opposite to each other.
The method of claim 4, wherein
The charging of the battery may include:
When the voltage of the battery is greater than or equal to a predetermined value, a high signal is applied to the first FET and the second FET to charge the battery while maintaining a voltage applied to the second coil below a predetermined value. To do, battery charging method.
The method of claim 4, wherein
The charging of the battery may include:
When the voltage of the battery is less than a predetermined value, by applying a low signal to the first FET and the second FET, to charge the battery while keeping the module open, battery charging method .
A receiver for receiving a voltage of a battery connected to a secondary coil side of a transformer including a primary coil and a secondary coil;
A module connected to the interruption of the primary coil consisting of a first coil and a second coil connected in series; And
Monitoring the voltage of the battery received by the receiver, applying a control signal determined according to the voltage of the battery to the module, and maintaining the voltage applied to the second coil below a preset value according to the control signal. And a processor that performs charging for the battery.
The method of claim 8,
The module includes a first FET and a second FET, wherein the first FET and the second FET are connected in series, and a direction of a diode included in the first FET and a direction of a diode included in the second FET. The battery charging device in this opposite direction.
The method of claim 9,
The processor is
When the voltage of the battery is greater than or equal to a predetermined value, a high signal is applied to the first FET and the second FET to charge the battery while maintaining a voltage applied to the second coil below a predetermined value. To carry, battery charging device.

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