Battery-embedded device and method for supplying power using same

Abstract

The invention relates to a battery-embedded device and a method for providing power using the same. In an underbody automatic charging device (ACDU) system including a vehicle unit (VU) mounted on a vehicle and a ground unit (GU) mounted on the ground and forming an electrical connection with the VU to transfer charging power to the vehicle, a battery embedded device for supplying power to the GU may include: an inlet connectable with a connector of a charger; a power transmission line for transmitting power provided from the charger to the GU through the inlet; a control boot (CP) circuit for communicating with the charger and the GU; a proximity detection (PD) circuit for detecting a connection to a connector of the charger; a rechargeable internal battery for supplying power to the GU; and a processor monitoring a voltage of the internal battery and charging the internal battery when a state of charge (SOC) of the internal battery is less than a first reference.

Description

[0001] Related Applications

[0002] This application claims priority and the benefit of Korean Patent Application No. 10-2023-0178630, filed with the Korean Intellectual Property Office on December 11, 2023, the entire contents of which are incorporated herein by reference. Technical Field

[0003] The present disclosure relates to a battery-embedded device and a method for providing power using the battery-embedded device. Background Art

[0004] According to global trends, such as regulating exhaust emissions of internal combustion engine locomotives and introducing eco-friendly vehicles, the production of internal combustion engine locomotives has decreased and a conversion to electric vehicles has occurred. Accordingly, the construction of infrastructure for charging electric vehicles is also actively underway.

[0005] However, the time required to charge an electric vehicle is longer than the time required to refuel an internal combustion engine, and there is a risk of electric shock, and the weight of the charging coupler and the weight of the cable increase due to an increase in the size of the charger (according to the increase in the size of the battery), which may lead to a decrease in operational convenience. In addition, when various users such as women, the elderly, the weak, and the disabled use a charging station, it is necessary to improve operational efficiency and convenience. In addition, if the number of future autonomous unmanned carriers increases, it will be difficult to use manual connection that needs to be performed by a user.

[0006] Thus, automatic charging device (ACD) technology has received attention. ACD is defined as a technology that can automatically charge when approaching a charger without the driver leaving the vehicle, and can be broadly classified into wireless charging, an automatic charging device for the bottom of the vehicle body (ACDU), and an automatic charging device for the side of the vehicle body (ACDS). Among them, ACDU can be a type in which a vehicle unit (VU) is implemented to provide a dedicated connector at the bottom of an electric vehicle and to bring the connector into contact with a ground unit (GU) provided on the floor of a charging facility for charging. Summary of the Invention

[0007] Embodiments of the present disclosure may provide a battery-embedded device capable of supplying power to a ground unit (GU) of an automatic charging device for the bottom of the vehicle body (ACDU) system and a method for providing power using the device.

[0008] Exemplary embodiments of the present disclosure may provide a battery-embedded device for supplying power to a ground unit (GU) in an automatic charging device (ACDU) system at the bottom of a vehicle body. The ACDU system may include a vehicle unit (VU) and a GU. The VU is assembled on the vehicle, and the GU is installed on the ground and forms an electrical connection with the VU to transmit charging power to the vehicle. The battery-embedded device may include: an inlet connected to a connector of a charger; a power transmission line for transmitting power provided by the charger to the GU through the inlet; a control pilot (CP) circuit for communicating with the charger and the GU; a proximity detection (PD) circuit for detecting the connection of the connector of the charger; a rechargeable internal battery for supplying power to the GU; and a processor for monitoring the voltage of the internal battery and charging the internal battery when the state of charge (SOC) of the internal battery is less than a set, selected, or predetermined first reference.

[0009] In some exemplary embodiments, the battery-embedded device may further include a switch mode power supply (SMPS) for providing a charging voltage for the internal battery from the power transmission line.

[0010] In some exemplary embodiments, the battery-embedded device may further include a first switch that connects the SMPS and the internal battery to each other in the on state and disconnects the SMPS and the internal battery from each other in the off state.

[0011] In some exemplary embodiments, the CP circuit may include: a second switch that connects a CP input node and the processor to each other in the on state and disconnects the CP input node and the processor from each other in the off state; and a third switch that connects the CP input node and a CP output node in the on state and disconnects the CP input node and the CP output node in the off state.

[0012] In some exemplary embodiments, the battery-embedded device may further include a fourth switch that changes the signal value of a CP signal transmitted from the CP input node to the processor under the control of the processor.

[0013] In some exemplary embodiments, the PD circuit may include a fifth switch and a sixth switch. The fifth switch connects a PD input node and the processor to each other in the on state and disconnects the PD input node and the processor from each other in the off state. The sixth switch connects the PD input node and a PD output node to each other in the on state and disconnects the PD input node and the PD output node from each other in the off state.

[0014] In some exemplary embodiments, the battery-embedded device may further include a seventh switch that is configured to conduct / block the power of the GU between the first switch and the internal battery. In some exemplary embodiments, the battery-embedded device may further include a power line communication (PLC) modem that is connected in parallel with a CP line connecting from a CP input node to a processor.

[0015] In some exemplary embodiments, when the state of charge (SOC) of the internal battery is less than a set, selected, or predetermined first reference, the processor may operate the SMPS, and when the vehicle is not being charged, the processor may charge the internal battery after controlling the first switch, the second switch, and the fifth switch to conduct and controlling the third switch and the sixth switch to block.

[0016] In some exemplary embodiments, when the vehicle is being charged, the processor may charge the internal battery after detecting a CP pulse width modulation (PWM) signal and then controlling the fourth switch to conduct.

[0017] In some exemplary embodiments, when the SOC of the internal battery exceeds a set, selected, or predetermined second reference, the processor may control the first switch, the second switch, and the fifth switch to block and control the third switch and the sixth switch to conduct.

[0018] In some exemplary embodiments, when the vehicle starts to be charged, the processor may control the first switch, the second switch, and the fifth switch to block and control the third switch and the sixth switch to conduct.

[0019] Exemplary embodiments of the present disclosure may provide a method for supplying power to a ground unit (GU) in an automatic charging device for a vehicle bottom (ACDU) system. The automatic charging device for a vehicle bottom (ACDU) system includes a vehicle unit (VU) and a GU. The VU is assembled on a vehicle, and the GU is installed on the ground and forms an electrical connection with the VU to transmit charging power to the vehicle using a battery-embedded device including a processor. The method may include: transmitting power provided from a charger to the GU through a power transmission line; monitoring the internal battery; determining whether the state of charge (SOC) of the internal battery is less than a set, selected, or predetermined first reference; when it is determined that the state of charge of the internal battery is less than the first reference, charging the internal battery; and supplying power to the GU using the internal battery.

[0020] In some exemplary embodiments, charging the internal battery may include operating a switch mode power supply (SMPS) that provides a charging voltage for the internal battery from the power transmission line.

[0021] In some exemplary embodiments, when the vehicle is not being charged, charging the internal battery may include: controlling the first switch to conduct to connect the SMPS and the internal battery to each other; controlling the second switch to conduct to connect the CP input node and the processor to each other; controlling the third switch to conduct to connect the PD input node and the processor to each other; controlling the fourth switch to turn off to disconnect the CP input node and the CP output node from each other; and controlling the fifth switch to turn off to disconnect the PD input node and the PD output node from each other.

[0022] In some exemplary embodiments, when the vehicle is being charged, charging the internal battery may include: detecting a CP pulse width modulation (PWM) signal; and controlling the sixth switch to conduct.

[0023] In some exemplary embodiments, the method may further include controlling the sixth switch to change the signal value of the CP signal transmitted from the CP input node to the processor.

[0024] In some exemplary embodiments, the method may further include: when it is determined that the SOC of the internal battery exceeds a set, selected, or predetermined second reference, controlling the first switch, the second switch, and the fifth switch to turn off; and controlling the third switch and the sixth switch to conduct.

[0025] In some exemplary embodiments, the method may further include: when the vehicle starts charging, controlling the first switch, the second switch, and the fifth switch to conduct; and controlling the third switch and the sixth switch to conduct.

[0026] In some exemplary embodiments, the method may further include controlling the seventh switch to turn on / off the power of the GU. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 is a schematic diagram showing a battery-embedded device according to an exemplary embodiment of the present disclosure.

[0028] Figure 2 is a flowchart showing a method for providing power according to an exemplary embodiment of the present disclosure.

[0029] Figure 3 is a schematic diagram showing a battery-embedded device according to an exemplary embodiment of the present disclosure.

[0030] Figure 4 is a diagram showing a method for providing power according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] Hereinafter, exemplary embodiments of the present disclosure will be described in detail with reference to the accompanying drawings, so that those of ordinary skill in the art of the present disclosure can easily implement these embodiments. However, the present disclosure can be implemented in various different forms and is not necessarily limited to the exemplary embodiments described herein. To clearly illustrate the present disclosure, parts irrelevant to the description may be omitted from the drawings, and the same elements may be denoted by the same reference numerals throughout the specification.

[0032] Throughout the specification and claims, when a part is referred to as "including" a certain component, this implies the potential presence of other components, without excluding the presence of other components, unless explicitly stated to the contrary. Ordinal terms such as "first" and "second" may be used to describe various components, but these components do not have to be limited by these terms. These terms may be used only for the purpose of distinguishing one component from another.

[0033] Figure 1 is a view showing a battery-embedded device according to an exemplary embodiment.

[0034] Reference Figure 1 , the battery-embedded device 1 according to an exemplary embodiment can be used in an automatic charging device for the vehicle body bottom (ACDU) system. The automatic charging device for the vehicle body bottom (ACDU) system may include a vehicle unit (VU) assembled on a vehicle and a ground unit (GU) installed on the ground and forming an electrical connection with the VU to transmit charging power to the vehicle. The battery-embedded device 1 may include an inlet, power transmission lines L1 and N, a control pilot (CP) circuit, a proximity detection (PD) circuit, an internal battery, and a processor uP, any combination or all of which may be multiple or may include multiple components among them. The internal battery may be a rechargeable battery and may supply power to the GU.

[0035] A connector (e.g., a type 1 connector) of a charger (e.g., an AC charger) may be connected to the inlet, and the inlet may be, for example, a type 1 inlet. Type 1 is a type of slow charging method and may be a single-phase standard that performs communication through CP. However, the scope of the present disclosure is not limited to type 1, and the scope of the present disclosure may be extended to type 2 (which is a three-phase standard) or other types of slow charging methods.

[0036] The power transmission lines L1 and N may transmit the power supplied from the charger through the inlet to the GU (e.g., an AC GU). Although the power transmission lines are shown as a pair of power transmission lines L1 and N because single-phase is illustrated in this exemplary embodiment, the number of lines may vary according to the applicable standard.

[0037] The CP circuit can be a circuit for communicating with the charger and the GU. The CP circuit can transmit the CP signal to and receive the CP signal from the charger and the GU, and the CP signal can include a signal for requesting to start or stop power transmission or controlling the power amount.

[0038] The CP circuit can include switch Q1 and switch Q3. Switch Q1 can connect the CP input node CP IN and the processor uP to each other in the on state and can not connect the CP input node CP IN and the processor uP to each other in the off state. The CP input node CP IN can be the node to which the CP signal transmitted from the charger through the inlet is input. Switch Q3 can connect the CP input node CP IN and the CP output node CP OUT to each other in the on state and can not connect the CP input node CP IN and the CP output node CP OUT to each other in the off state. The CP output node CP OUT can be the node from which the CP signal is transmitted to the GU. Therefore, when switch Q1 is in the on state and switch Q3 is in the off state, the CP signal can be transmitted to the processor uP. On the other hand, when switch Q1 is in the off state and switch Q3 is in the on state, the CP signal can be transmitted to the GU in a bypass manner.

[0039] The battery-embedded device 1 can further include switch S2. Switch S2 can change the signal value of the CP signal transmitted from the CP input node CP IN to the processor uP under the control of the processor uP.

[0040] The PD circuit can be a circuit for detecting the connection of the connector of the charger. The PD circuit can transmit the PD signal to and receive the PD signal from the charger and the GU, and the PD signal can include a signal indicating whether the PD contact of the connector and the PD port of the inlet are in contact with each other.

[0041] The PD circuit may include switches Q2 and Q4. Switch Q2 may connect the PD input node PD IN and the processor uP to each other in the on state and may not connect the PD input node PD IN and the processor uP to each other in the off state. The PD input node PD IN may be the node to which the PD signal is input, and the PD signal may indicate whether the PD contacts of the connector and the PD port of the inlet are in contact with each other. On the other hand, switch Q4 may connect the PD input node PD IN and the PD output node PD OUT to each other in the on state and may not connect the PD input node PD IN and the PD output node PD OUT to each other in the off state. The PD output node PD OUT may be the node from which the PD signal is transmitted to the GU. Therefore, when switch Q2 is in the on state and switch Q4 is in the off state, the PD signal may be transmitted to the processor uP. On the other hand, when switch Q2 is in the off state and switch Q4 is in the on state, the PD signal may be transmitted to the GU in a bypass manner.

[0042] The battery-embedded device 1 may further include a switch-mode power supply (SMPS). The SMPS may provide a charging voltage for the internal battery from the power transmission line. In some exemplary embodiments, the charging voltage of the internal battery may be 12 V. The battery-embedded device 1 may further include a regulator. The regulator may provide a driving voltage for the processor uP from the voltage signal output from the power transmission line through the SMPS. In some exemplary embodiments, the driving voltage of the processor uP may be 5 V.

[0043] The battery-embedded device 1 may further include a switch S4. Switch S4 may connect the SMPS and the internal battery to each other in the on state and may not connect the SMPS and the internal battery to each other in the off state.

[0044] The battery-embedded device 1 may further include a switch Q5 between switch S4 and the internal battery. Switch Q5 may be used to power on / off the GU. That is, switch Q5 may switch the GU to the on state in the on state and may switch the GU to the off state in the off state.

[0045] The processor uP may monitor the voltage of the internal battery. When the state of charge (SOC) of the internal battery is less than a first reference set, selected, or predetermined, the processor uP may control the internal battery to be charged.

[0046] Specifically, when the SOC of the internal battery is less than the first reference, the processor uP may operate the SMPS. For example, when the SOC of the internal battery is less than 10%, the processor uP may operate the SMPS.

[0047] When the vehicle is not being charged, the processor uP can control switch S4, switch Q1, and switch Q2 to conduct, and control switch Q3 and switch Q4 to turn off. That is, the processor uP can control switch S4 to conduct to connect the SMPS and the internal battery to each other, control switch Q1 to conduct to connect the CP input node CP IN and the processor uP to each other, control switch Q2 to conduct to connect the PD input node PD IN and the processor uP to each other, control switch Q3 to turn off to disconnect the CP input node CP IN and the CP output node CP OUT from each other, and control switch Q4 to turn off to disconnect the PD input node PD IN and the PD output node PD OUT from each other. Then, charging of the internal battery can start.

[0048] On the other hand, when the vehicle is being charged, the processor uP can control switch S2 to conduct after detecting a CP pulse width modulation (PWM) signal. Then, charging of the internal battery can start.

[0049] When the state of charge (SOC) of the internal battery exceeds a set, selected, or predetermined second reference, the processor uP can control switch S4, switch Q1, and switch Q2 to turn off, and control switch Q3 and switch Q4 to conduct. For example, when the SOC of the internal battery exceeds 90%, the processor uP can control switch S4 to turn off to disconnect the SMPS and the internal battery from each other, control switch Q1 to turn off to disconnect the CP input node CP IN and the processor uP from each other, control switch Q2 to turn off to disconnect the PD input node PD IN and the processor uP from each other, control switch Q3 to conduct to connect the CP input node CP IN and the CP output node CP OUT to each other, and control switch Q4 to conduct to connect the PD input node PD IN and the PD output node PD OUT.

[0050] Alternatively, when the vehicle starts charging, the processor uP can control switch S4, switch Q1, and switch Q2 to turn off, and control switch Q3 and switch Q4 to conduct. That is, the processor uP can control switch S4 to turn off to disconnect the SMPS and the internal battery from each other, control switch Q1 to turn off to disconnect the CP input node CP IN and the processor uP from each other, control switch Q2 to turn off to disconnect the PD input node PD IN and the processor uP from each other, control switch Q3 to conduct to connect the CP input node CP IN and the CP output node CP OUT to each other, and control the fifth switch Q4 to conduct to connect the PD input node PD IN and the PD output node PD OUT to each other.

[0051] In an exemplary embodiment, R2 can be set to 1.3 kΩ, R3 can be set to 2.74 kΩ, and R4 can be set to 330 Ω, but the scope of the present disclosure is not necessarily limited to specific resistance values.

[0052] According to an exemplary embodiment, since a battery-embedded device having a rechargeable internal battery can supply power to the GU, it is not necessary to connect a separate external power source to the GU, and thus limitations in establishing a charging infrastructure can be reduced.

[0053] Figure 2 is a flowchart showing a method for supplying power according to an exemplary embodiment.

[0054] Refer to Figure 2 , the method for supplying power according to an exemplary embodiment may include: monitoring the voltage of the internal battery (operation S201), and determining whether the SOC of the internal battery is less than a set, selected, or predetermined first reference (e.g., 10%) (operation S202).

[0055] When it is determined that the SOC of the internal battery is greater than or equal to the first reference, the method may proceed to operation S201.

[0056] When it is determined that the SOC of the internal battery is less than the first reference, the method may further include operating the SMPS (operation S203) and determining whether the vehicle is being charged (operation S204).

[0057] When it is determined that the vehicle is not being charged, the method may further include controlling switch S4, switch Q1, and switch Q2 to conduct, and controlling switch Q3 and switch Q4 to turn off (operation S205), controlling switch S2 to conduct after detecting the CP PWM signal (operation S206), and charging the internal battery (operation S207).

[0058] On the other hand, when it is determined that the vehicle is being charged, the method may further include charging the internal battery (operation S207) after operation S204.

[0059] Subsequently, the method may include determining whether the SOC of the internal battery exceeds a set, selected, or predetermined second reference (e.g., 90%) (operation S208). When the SOC of the internal battery is less than the second reference, the method may proceed to operation S207.

[0060] When it is determined that the SOC of the internal battery exceeds the second reference, the method may further include controlling switch S4, switch Q1, and switch Q2 to turn off, and controlling switch Q3 and switch Q4 to conduct (operation S210).

[0061] After operation S207, the method may include determining whether to start charging the vehicle (operation S209). When it is determined to start charging the vehicle, the method may further include controlling switch S4, switch Q1, and switch Q2 to turn off, and controlling switch Q3 and switch Q4 to conduct (operation S210).

[0062] A method for providing power according to an exemplary embodiment has been described in more detail above or will be described in more detail below, and reference may be made to Figure 1 , Figure 3 and Figure 4 , and thus, redundant descriptions will be omitted here.

[0063] Figure 3 FIG. is a diagram showing a battery-embedded device according to an exemplary embodiment.

[0064] Referring to Figure 3 , in contrast to the example of the battery-embedded device 1 in Figure 1 , a fast charging method can be applied to the battery-embedded device 2 according to an exemplary embodiment. The battery-embedded device 2 may include an inlet, power transmission lines DC+ and DC-, a CP circuit, a PD circuit, an internal battery, and a processor uP, any combination or all of which may be multiple or may include multiple components thereof.

[0065] A connector of a charger (e.g., a DC charger) (e.g., a CCS type 1 connector) may be connected to the inlet, and the inlet may be, for example, a CCS type 1 inlet. CCS type 1 is a type of fast charging method and may be a standard for communication via a PLC modem. However, the scope of the present disclosure is not limited to CCS type 1 and may also be extended to CCS type 2 or other types of fast charging methods.

[0066] The power transmission lines DC+ and DC- may transmit the power provided from the charger through the inlet to the GU (e.g., DCGU). Although the power transmission lines are shown as a pair of power transmission lines DC+ and DC- because single-phase is illustrated in the present exemplary embodiment, the number of lines may vary according to the applicable standard.

[0067] The battery-embedded device 2 may further include a PLC modem. The PLC modem may be connected in parallel with the CP line connecting from the CP input node CP IN to the processor uP.

[0068] Regarding other elements of the battery-embedded device 2, unless there is a contradiction, reference may be made to the above reference Figure 1 description, and thus redundant descriptions will be omitted here.

[0069] The processor uP may monitor the voltage of the internal battery. When the SOC of the internal battery is less than a first reference set, selected, or predetermined, the processor uP may control the charging of the internal battery. Specifically, when the SOC of the internal battery is less than the first reference, the processor uP may operate the SMPS. For example, when the SOC of the internal battery is less than 10%, the processor uP may operate the SMPS.

[0070] When the vehicle is not being charged, the processor uP can control switch S4, switch Q1, and switch Q2 to conduct, and control switch Q3 and switch Q4 to turn off. That is, the processor uP can control switch S4 to conduct to connect the SMPS and the internal battery to each other, control switch Q1 to conduct to connect the CP input node CP IN and the processor uP to each other, control switch Q2 to conduct to connect the PD input node PDIN and the processor uP to each other, control switch Q3 to turn off to disconnect the CP input node CP IN and the CP output node CP OUT from each other, and control Q4 to turn off to disconnect the PD input node PD IN and the PD output node PD OUT from each other. Then, charging of the internal battery can start.

[0071] On the other hand, when the vehicle is being charged, the processor uP can control switch S2 to conduct after detecting the CP PWM signal. Then, charging of the internal battery can start.

[0072] When the SOC of the internal battery exceeds a set, selected, or predetermined second reference, the processor uP can control switch S4, switch Q1, and switch Q2 to turn off, and control switch Q3 and switch Q4 to conduct. For example, when the SOC of the internal battery exceeds 90%, the processor uP can control switch S4 to turn off to disconnect the SMPS and the internal battery from each other, control switch Q1 to turn off to disconnect the CP input node CP IN and the processor uP from each other, control switch Q2 to turn off to disconnect the PD input node PD IN and the processor uP from each other, control switch Q3 to conduct to connect the CP input node CP IN and the CP output node CP OUT to each other, and control switch Q4 to conduct to connect the PD input node PD IN and the PD output node PD OUT.

[0073] Alternatively, when the vehicle starts charging, the processor uP can control switch S4, switch Q1, and switch Q2 to turn off, and control switch Q3 and switch Q4 to conduct. That is, the processor uP can control switch S4 to turn off to disconnect the SMPS and the internal battery from each other, control switch Q1 to turn off to disconnect the CP input node CP IN and the processor uP from each other, control switch Q2 to turn off to disconnect the PD input node PD IN and the processor uP from each other, control switch Q3 to conduct to connect the CP input node CP IN and the CP output node CP OUT to each other, and control the fifth switch Q4 to conduct to connect the PD input node PD IN and the PD output node PD OUT to each other.

[0074] Figure 4 is a diagram showing a method for providing power according to an exemplary embodiment.

[0075] Reference Figure 4, A method for providing power according to an exemplary embodiment may include: establishing a WiFi association among an Electric Vehicle Supply Equipment (EVSE) 11, a GU 10, a VU 12, and an electric vehicle (EV) 13 (operation S401); the EV 13 transmitting a positioning request to the EVSE 11 (operation S402); the EV 13 performing parking (step S403); and the EVSE 11 responding to the EV 13 with positioning coordinates (X, Y) (S404).

[0076] In addition, the method for providing power may include: the EV 13 transmitting a docking request to the EVSE 11 (operation S405); the EVSE 11 transmitting the docking request to the GU 10 (operation S406); the GU 10 performing docking (operation S407); the GU 10 transmitting a docking response indicating that docking has been completed to the EVSE 11 (operation S408); the EVSE 11 transmitting the docking response indicating that docking has been completed to the EV 13 (S409).

[0077] In addition, the method for providing power may include: the EV 13 transmitting a charging start request to the EVSE 11 (operation S410); the EVSE 11 transmitting a charging start response to the EV 13 (operation S411); the EVSE 11 and the EV 13 performing charging (operations S412 and S413); the EV 13 transmitting a charging stop request to the EVSE 11 (step S414); the EVSE 11 transmitting a charging stop response to the EV 13 (step S415).

[0078] In addition, the method for providing power may include: the EV 13 transmitting a undocking request to the EVSE 11 (operation S416); the EVSE 11 transmitting the undocking request to the GU 10 (operation S417); the GU 10 performing undocking (operation S418); the GU 10 transmitting an undocking response indicating that undocking has been completed to the EVSE 11 (operation S419); the EVSE 11 transmitting the undocking response indicating that undocking has been completed to the EV 13 (step S420).

[0079] In the case of separately providing external power to the GU according to the charging infrastructure environmental conditions, this may be a major limitation. On the contrary, according to the exemplary embodiment, since a battery-embedded device that can recharge an internal battery and provide power to the GU can be embedded, it is not necessary to separately connect an external power source to the GU, and the limitations in establishing a charging infrastructure can be reduced. In addition, the battery-embedded device can be implemented in combination with a charger that supports international standards for electric vehicles, and an infrastructure for automatically charging an electric vehicle with improved user convenience can be provided.

[0080] Although the exemplary embodiments of the present disclosure have been described in detail above, the scope of the present disclosure is not necessarily limited thereto, and various modifications and improvements made by those of ordinary skill in the art to the concepts of the present disclosure defined in the appended claims may also fall within the scope of the present disclosure.

Claims

1. A battery embedded device configured to supply power to a ground unit in an underbody automatic charging device system, the underbody automatic charging device system comprising a vehicle unit and the ground unit, the vehicle unit being mounted on a vehicle, the ground unit being mounted on the ground and forming an electrical connection with the vehicle unit to transmit charging power to the vehicle, the device comprising: an inlet configured to be connected to a connector of a charger; a power transmission line configured to transmit power provided from the charger through the inlet to the ground unit; a control pilot circuit configured to provide communication with the charger and the ground unit; a proximity detection circuit configured to detect connection of the connector of the charger; a rechargeable internal battery configured to provide power to the ground unit; as well as A processor is configured to monitor a voltage of the internal battery and charge the internal battery in response to a state of charge of the internal battery being less than a first reference.

2. The apparatus according to claim 1, further comprising: A switch mode power supply is configured to provide a charging voltage for the internal battery from the power transmission line.

3. The apparatus according to claim 2, further comprising: A first switch is configured to connect the switch mode power supply and the internal battery to each other in an on state, and is configured to disconnect the switch mode power supply and the internal battery from each other in an off state.

4. The device according to claim 3, wherein: The control guidance circuit comprises: a second switch configured to connect the control guide input node and the processor to each other in an on state, and configured to disconnect the control guide input node and the processor from each other in an off state; and The third switch is configured to connect the control steering input node and the control steering output node in an on state, and is configured to disconnect the control steering input node from the control steering output node in an off state.

5. The apparatus according to claim 4, further comprising: A fourth switch is configured to change a signal value of a control guidance signal transmitted from the control guidance input node to the processor under the control of the processor.

6. The device according to claim 5, wherein: The proximity detection circuit comprises: a fifth switch configured to connect the proximity detection input node and the processor to each other in an on state, and configured to disconnect the proximity detection input node and the processor from each other in an off state; and A sixth switch is configured to connect the proximity detection input node and the proximity detection output node to each other in an on state, and is configured to disconnect the proximity detection input node and the proximity detection output node from each other in an off state.

7. The device according to claim 5, further comprising A seventh switch is configured to switch on / off the power of the ground unit between the first switch and the internal battery.

8. The device according to claim 4, further comprising A power line communication modem is connected in parallel with the control lead line connected from the control lead input node to the processor.

9. The device according to claim 7, wherein: The processor is configured to operate the switch mode power supply in response to the state of charge of the internal battery being less than a first reference, and In response to the vehicle not being charged, the processor is configured to charge the internal battery after controlling the first switch, the second switch, and the fifth switch to be turned on, and controlling the third switch and the sixth switch to be turned off.

10. The device according to claim 9, wherein: In response to The vehicle is charged, and the processor is configured to charge the internal battery after controlling the fourth switch to be turned on after detecting the control pilot pulse width modulation signal.

11. The device according to claim 10, wherein: In response to the state of charge of the internal battery exceeds a second reference, The processor is configured to control the first switch, the second switch, and the fifth switch to be turned off, and control the third switch and the sixth switch to be turned on.

12. The device according to claim 10, wherein: In response to The vehicle starts to be charged, and the processor is configured to control the first switch, the second switch, and the fifth switch to be turned off, and control the third switch and the sixth switch to be turned on.

13. A method for supplying power to a ground unit in an underbody automatic charger system, the underbody automatic charger system comprising a vehicle unit and the ground unit, the vehicle unit being mounted on a vehicle, the ground unit being mounted on the ground and forming an electrical connection with the vehicle unit to transmit charging power to the vehicle using a battery embedded device including a processor, the method comprising: transmitting power provided from the charger to the ground unit via a power transmission line; Monitor internal battery; determining whether a state of charge of the internal battery is less than a first reference; charging the internal battery in response to determining that the state of charge of the internal battery is less than the first reference; as well as Power is provided to the surface unit using the internal battery.

14. The method according to claim 13, wherein: Charging the internal battery includes operating a switch mode power supply that provides a charging voltage for the internal battery from the power transmission line.

15. The method according to claim 14, wherein: In response to The vehicle is not charged, and charging the internal battery comprises: controlling a first switch to be turned on to connect the switch mode power supply and the internal battery to each other; controlling the second switch to be turned on to connect the control guide input node and the processor to each other; controlling the third switch to be turned on to connect the proximity detection input node and the processor to each other; controlling the fourth switch to be turned off to disconnect the control steering input node and the control steering output node from each other; and The fifth switch is controlled to be turned off to disconnect the proximity detection input node and the proximity detection output node from each other.

16. The method according to claim 15, wherein: In response to The vehicle is charged, and charging the internal battery includes: detecting a control pilot pulse width modulation signal; and The sixth switch is controlled to be turned on. 17 . The method of claim 16 , further comprising controlling the fourth switch to change a signal value of a control directive signal transmitted from the control directive input node to the processor.

18. The method of claim 16, in response to determining that the state of charge of the internal battery exceeds a second reference, the method further comprising: Controlling the first switch to turn off; Controlling the second switch to turn off; Controlling the third switch to be turned on; Controlling the fifth switch to turn off; as well as The sixth switch is controlled to be turned on.

19. The method according to claim 16, in response to the vehicle starting to charge, the method further comprising: Controlling the first switch to turn off; Controlling the second switch to turn off; Controlling the third switch to be turned on; Controlling the fifth switch to turn off; as well as The sixth switch is controlled to be turned on.

20. A method for supplying power to a ground unit in an underbody automatic charger system, the underbody automatic charger system comprising a vehicle unit and the ground unit, the vehicle unit being mounted on a vehicle, the ground unit being mounted on the ground and forming an electrical connection with the vehicle unit to transmit charging power to the vehicle using a battery embedded device including a processor, the method comprising: transmitting power provided from the charger to the ground unit via a power transmission line; Monitor internal battery; determining whether a state of charge of the internal battery is less than a first reference; charging the internal battery in response to determining that the state of charge of the internal battery is less than the first reference; providing power to the ground unit using the internal battery; as well as The switch is controlled to turn on / off the power of the ground unit.

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