Electronic device for charging battery by using switched capacitor voltage divider, and operating method therefor

Abstract

An electronic device according to the present invention may comprise: a communication circuit; a battery; a switched capacitor voltage divider (SCVD) configured to convert the voltage of power provided from the outside according to a specified ratio and supply the converted voltage to the battery; and a processor. The processor identifies a first voltage (VIN) and a first current (IIN), which are input to the SCVD, and a second voltage (VBAT) and a second current (IBAT), which are input to the battery, while charging the battery by using the SCVD, calculates first resistance (RT) corresponding to the input terminal of the SCVD and second resistance (RCH) and third resistance (RDCR) corresponding to the output terminal of the SCVD on the basis of the first voltage, the first current, the second voltage, or the second current, and requests an external power supply device to change a voltage by a first change value, wherein the first change value is identified using at least one of the first resistance, the second resistance, and the third resistance.

Description

Electronic device for charging a battery using a switched capacitor voltage divider and method of operation thereof

[0001] The present disclosure relates to an electronic device for charging a battery using a switched capacitor voltage divider and a method of operating the same.

[0002] Recently, the use of portable electronic devices such as smartphones, tablet PCs, wearable devices, or augmented glasses has been increasing, and as the use of electronic devices surges, research on batteries to extend usage time is actively underway. These electronic devices may be configured to use a high-speed charging method capable of receiving a larger amount of power in order to stably provide more power.

[0003] According to one embodiment, the electronic device may include a communication circuit, a battery, a switched capacitor voltage divider (SCVD) configured to convert an input voltage into an output voltage supplied to the battery according to a specified ratio, and a processor. According to one embodiment, the processor may be configured to charge the battery using the SCVD based on receiving power from an external power supply via wired or wireless connection. According to one embodiment, while charging the battery using the SCVD, the processor may be configured to check a first voltage (VIN) and a first current (IIN) input to the SCVD and a second voltage (VBAT) and a second current (IBAT) input to the battery. According to one embodiment, the processor may be configured to calculate a first resistor (RT) corresponding to the input terminal of the SCVD, and a second resistor (RCH) and a third resistor (RDCR) corresponding to the output terminal of the SCVD, based on verifying the first voltage, the first current, the second voltage, or the second current. According to one embodiment, the processor may be configured to request the external power supply to change the voltage of the power by a first change value via the communication circuit in response to verifying a voltage change condition for requesting the external power supply to change the voltage of the power, and the first change value may be verified using at least one of the first resistor, the second resistor, and the third resistor.

[0004] According to one embodiment, a method of operation of an electronic device including a switched capacitor voltage divider (SCVD) may include an operation of charging a battery included in the electronic device using the SCVD based on receiving power from an external power supply via wired or wireless connection. According to one embodiment, the method of operation of the electronic device may include an operation of checking a first voltage (VIN) and a first current (IIN) input to the SCVD and a second voltage (VBAT) and a second current (IBAT) input to the battery while charging the battery using the SCVD. According to one embodiment, the method of operation of the electronic device may include an operation of calculating a first resistance (RT), which is an equivalent resistance from the external power supply to the input terminal of the SCVD, a second resistance (RCH), which is an equivalent resistance from the output terminal of the SCVD to the input terminal of the battery, and a third resistance (RDCR), which is an internal resistance of the battery, based on verifying the first voltage, the first current, the second voltage, or the second current. According to one embodiment, the method of operation of the electronic device may include an operation of requesting the external power supply to change the voltage of the power by a first change value via the communication circuit included in the electronic device in response to verifying a voltage change condition for requesting the external power supply to change the voltage of the power, wherein the first change value may be verified using at least one of the first resistance, the second resistance, and the third resistance.

[0005] FIG. 1 is a block diagram of an electronic device in a network environment according to one embodiment.

[0006] FIG. 2 is a block diagram showing the schematic configuration of an electronic device according to one embodiment.

[0007] FIGS. 3a and FIGS. 3b are circuit diagrams for an external power supply and an electronic device according to one embodiment.

[0008] FIGS. 4a and FIGS. 4b are equivalent circuit diagrams of an electronic device for changing the voltage of power output from an external power supply according to one embodiment.

[0009] FIG. 5 is a flowchart illustrating a method for requesting an electronic device to change the voltage of power to an external power supply device according to one embodiment.

[0010] FIG. 6 is a flowchart for more specifically explaining a method for an electronic device to request an external power supply to change the voltage of the power according to one embodiment.

[0011] FIG. 7 is a flowchart illustrating a method for determining a change value for requesting an electronic device to change the voltage of power to an external power supply device, according to one embodiment.

[0012] FIG. 8 is a graph illustrating a method for determining a change value to request a voltage change from an external power supply when an electronic device starts charging a battery using an SCVD according to one embodiment.

[0013] FIG. 9 is a graph illustrating a method for determining a change value for which an electronic device requests a voltage change from an external power supply in a constant voltage (CV) charging state of a battery, according to one embodiment.

[0014] FIG. 10 is a graph illustrating a method for determining a change value for which an electronic device requests a voltage change from an external power supply in a constant current (CC) charging state of a battery, according to one embodiment.

[0015] FIG. 11 is an equivalent circuit diagram of an electronic device when a load fluctuation of the system occurs, according to one embodiment.

[0016] FIGS. 12a and FIGS. 12b are flowcharts illustrating a method for an electronic device to determine a resistance value for each state according to one embodiment.

[0017] FIG. 13 is a graph illustrating a method for compensating resistance values ​​when a load variation is detected in an electronic device according to one embodiment.

[0018] FIG. 14 is a graph illustrating a method for an electronic device to compensate for resistance values ​​according to one embodiment.

[0019] FIG. 15 is a flowchart illustrating a method for determining a resistance value when a load fluctuation is detected in an electronic device, according to one embodiment.

[0020] FIG. 16 is a graph illustrating a method for determining the point in time when an electronic device calculates a resistance value according to one embodiment.

[0021] FIG. 1 is a block diagram of an electronic device (101) in a network environment (100) according to one embodiment. Referring to FIG. 1, in the network environment (100), the electronic device (101) may communicate with an electronic device (102) through a first network (198) (e.g., a short-range wireless communication network) or may communicate with at least one of an electronic device (104) or a server (108) through a second network (199) (e.g., a long-range wireless communication network). According to one embodiment, the electronic device (101) may communicate with the electronic device (104) through the server (108). According to one embodiment, the electronic device (101) may include a processor (120), memory (130), input module (150), sound output module (155), display module (160), audio module (170), sensor module (176), interface (177), connection terminal (178), haptic module (179), camera module (180), power management module (188), battery (189), communication module (190), subscriber identification module (196), or antenna module (197). In some embodiments, at least one of these components (e.g., connection terminal (178)) may be omitted from the electronic device (101), or one or more other components may be added. In some embodiments, some of these components (e.g., sensor module (176), camera module (180), or antenna module (197)) may be integrated into a single component (e.g., display module (160)).

[0022] The processor (120) can control at least one other component (e.g., hardware or software component) of the electronic device (101) connected to the processor (120) by executing software (e.g., program (140)), for example, and can perform various data processing or operations. According to one embodiment, as at least part of the data processing or operations, the processor (120) can store commands or data received from other components (e.g., sensor module (176) or communication module (190)) in volatile memory (132), process the commands or data stored in volatile memory (132), and store the resulting data in non-volatile memory (134). According to one embodiment, the processor (120) may include a main processor (121) (e.g., central processing unit or application processor) or an auxiliary processor (123) that can operate independently or together with it (e.g., graphics processing unit, neural processing unit (NPU), image signal processor, sensor hub processor, or communication processor). For example, if the electronic device (101) includes a main processor (121) and an auxiliary processor (123), the auxiliary processor (123) may be configured to use lower power than the main processor (121) or to be specialized for a designated function. The auxiliary processor (123) may be implemented separately from the main processor (121) or as part thereof.

[0023] The auxiliary processor (123) may control at least some of the functions or states associated with at least one component of the electronic device (101) (e.g., display module (160), sensor module (176), or communication module (190)) on behalf of the main processor (121) while the main processor (121) is in an inactive (e.g., sleep) state, or together with the main processor (121) while the main processor (121) is in an active (e.g., application execution) state. According to one embodiment, the auxiliary processor (123) (e.g., image signal processor or communication processor) may be implemented as part of another functionally related component (e.g., camera module (180) or communication module (190)). According to one embodiment, the auxiliary processor (123) (e.g., neural network processing unit) may include a hardware structure specialized for processing an artificial intelligence model. The artificial intelligence model may be generated through machine learning. Such learning may be performed, for example, on the electronic device (101) itself where the artificial intelligence model is executed, or through a separate server (e.g., server (108)). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but is not limited to the examples described above. The artificial intelligence model may include a plurality of artificial neural network layers.An artificial neural network may be a deep neural network (DNN), a convolutional neural network (CNN), a recurrent neural network (RNN), a restricted Boltzmann machine (RBM), a deep belief network (DBN), a bidirectional recurrent deep neural network (BRDNN), a deep Q-network, or a combination of two or more of the above, but is not limited to the examples described above. In addition to the hardware structure, the artificial intelligence model may include a software structure, either additionally or substantially.

[0024] The memory (130) can store various data used by at least one component of the electronic device (101) (e.g., processor (120) or sensor module (176)). The data may include, for example, input data or output data for software (e.g., program (140)) and related commands. The memory (130) may include volatile memory (132) or non-volatile memory (134).

[0025] The program (140) may be stored as software in memory (130) and may include, for example, an operating system (142), middleware (144), or an application (146).

[0026] The input module (150) can receive commands or data to be used for a component of the electronic device (101) (e.g., processor (120)) from outside the electronic device (101) (e.g., user). The input module (150) may include, for example, a microphone, a mouse, a keyboard, a key (e.g., a button), or a digital pen (e.g., a stylus pen).

[0027] The sound output module (155) can output a sound signal to the outside of the electronic device (101). The sound output module (155) may include, for example, a speaker or a receiver. The speaker may be used for general purposes, such as multimedia playback or recording playback. The receiver may be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from the speaker or as part thereof.

[0028] The display module (160) can visually provide information to an external (e.g., user) of the electronic device (101). The display module (160) may include, for example, a display, a holographic device, or a projector and a control circuit for controlling said device. According to one embodiment, the display module (160) may include a touch sensor configured to detect a touch, or a pressure sensor configured to measure the intensity of the force generated by said touch.

[0029] The audio module (170) can convert sound into an electrical signal or, conversely, convert an electrical signal into sound. According to one embodiment, the audio module (170) can acquire sound through the input module (150) or output sound through the sound output module (155) or an external electronic device (e.g., electronic device (102)) (e.g., speaker or headphones) connected directly or wirelessly to the electronic device (101).

[0030] The sensor module (176) can detect the operating state of the electronic device (101) (e.g., power or temperature) or the external environmental state (e.g., user state) and generate an electrical signal or data value corresponding to the detected state. According to one embodiment, the sensor module (176) may include, for example, a gesture sensor, a gyroscope sensor, a barometric pressure sensor, a magnetic sensor, an accelerometer sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biosensor, a temperature sensor, a humidity sensor, or an illuminance sensor.

[0031] The interface (177) may support one or more specified protocols that can be used for the electronic device (101) to be connected directly or wirelessly to an external electronic device (e.g., electronic device (102)). According to one embodiment, the interface (177) may include, for example, a high definition multimedia interface (HDMI), a universal serial bus (USB) interface, an SD card interface, or an audio interface.

[0032] The connection terminal (178) may include a connector through which the electronic device (101) can be physically connected to an external electronic device (e.g., electronic device (102)). According to one embodiment, the connection terminal (178) may include, for example, an HDMI connector, a USB connector, an SD card connector, or an audio connector (e.g., a headphone connector).

[0033] The haptic module (179) can convert an electrical signal into a mechanical stimulus (e.g., vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic senses. According to one embodiment, the haptic module (179) may include, for example, a motor, a piezoelectric element, or an electric stimulation device.

[0034] The camera module (180) can capture still images and video. According to one embodiment, the camera module (180) may include one or more lenses, image sensors, image signal processors, or flashes.

[0035] The power management module (188) can manage the power supplied to the electronic device (101). According to one embodiment, the power management module (188) can be implemented, for example, as at least part of a power management integrated circuit (PMIC).

[0036] The battery (189) can supply power to at least one component of the electronic device (101). According to one embodiment, the battery (189) may include, for example, a non-rechargeable primary battery, a rechargeable secondary battery, or a fuel cell.

[0037] The communication module (190) can support the establishment of a direct (e.g., wired) communication channel or a wireless communication channel between an electronic device (101) and an external electronic device (e.g., electronic device (102), electronic device (104), or server (108)), and the performance of communication through the established communication channel. The communication module (190) may include one or more communication processors that operate independently of the processor (120) (e.g., application processor) and support direct (e.g., wired) communication or wireless communication. According to one embodiment, the communication module (190) may include a wireless communication module (192) (e.g., cellular communication module, short-range wireless communication module, or GNSS (global navigation satellite system) communication module) or a wired communication module (194) (e.g., LAN (local area network) communication module, or power line communication module). The corresponding communication module among these communication modules can communicate with an external electronic device (104) through a first network (198) (e.g., a short-range communication network such as Bluetooth, WiFi (wireless fidelity) direct, or IrDA (infrared data association)) or a second network (199) (e.g., a legacy cellular network, a 5G network, a next-generation communication network, the Internet, or a computer network (e.g., a LAN or WAN)). These various types of communication modules may be integrated into a single component (e.g., a single chip) or implemented as multiple separate components (e.g., multiple chips). The wireless communication module (192) can identify or authenticate the electronic device (101) within a communication network such as the first network (198) or the second network (199) using subscriber information (e.g., International Mobile Subscriber Identifier (IMSI)) stored in the subscriber identification module (196).

[0038] The wireless communication module (192) can support 5G networks and next-generation communication technologies following 4G networks, for example, new radio access technology. NR access technology can support high-speed transmission of high-capacity data (enhanced mobile broadband (eMBB)), minimization of terminal power and connection of multiple terminals (massive machine type communications (mMTC)), or high reliability and low latency (ultra-reliable and low-latency communications (URLLC)). The wireless communication module (192) can support a high-frequency band (e.g., mmWave band) to achieve a high data transmission rate, for example. The wireless communication module (192) can support various technologies for securing performance in the high-frequency band, such as beamforming, massive MIMO (multiple-input and multiple-output), full-dimensional MIMO (FD-MIMO), array antenna, analog beam-forming, or large-scale antenna. The wireless communication module (192) can support various requirements specified in the electronic device (101), external electronic device (e.g., electronic device (104)), or network system (e.g., second network (199)). According to one embodiment, the wireless communication module (192) can support a Peak data rate (e.g., 20 Gbps or more) for realizing eMBB, loss coverage (e.g., 164 dB or less) for realizing mMTC, or U-plane latency (e.g., downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) for realizing URLLC.

[0039] An antenna module (197) can transmit a signal or power to or from an external source (e.g., an external electronic device). According to one embodiment, the antenna module (197) may include an antenna comprising a radiator made of a conductor or a conductive pattern formed on a substrate (e.g., a PCB). According to one embodiment, the antenna module (197) may include a plurality of antennas (e.g., an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network, such as a first network (198) or a second network (199), may be selected from the plurality of antennas, for example, by a communication module (190). A signal or power may be transmitted or received between the communication module (190) and an external electronic device through the selected at least one antenna. According to some embodiments, in addition to the radiator, other components (e.g., a radio frequency integrated circuit (RFIC)) may be additionally formed as part of the antenna module (197).

[0040] According to one embodiment, the antenna module (197) may form a mmWave antenna module. According to one embodiment, the mmWave antenna module may include a printed circuit board, an RFIC disposed on or adjacent to a first surface (e.g., bottom surface) of the printed circuit board and capable of supporting a specified high frequency band (e.g., mmWave band), and a plurality of antennas (e.g., array antennas) disposed on or adjacent to a second surface (e.g., top surface or side surface) of the printed circuit board and capable of transmitting or receiving a signal of the specified high frequency band.

[0041] At least some of the above components can be connected to each other via a communication method between peripheral devices (e.g., bus, GPIO (general purpose input and output), SPI (serial peripheral interface), or MIPI (mobile industry processor interface)) and exchange signals (e.g., commands or data) with each other.

[0042] According to one embodiment, commands or data may be transmitted or received between the electronic device (101) and an external electronic device (104) through a server (108) connected to a second network (199). Each of the external electronic devices (102, or 104) may be the same or a different type of device as the electronic device (101). According to one embodiment, all or part of the operations performed on the electronic device (101) may be performed on one or more of the external electronic devices (102, 104, or 108). For example, if the electronic device (101) needs to perform a function or service automatically or in response to a request from a user or another device, the electronic device (101) may request one or more external electronic devices to perform at least part of the function or service instead of performing the function or service itself or additionally. One or more external electronic devices that receive the above request may execute at least part of the requested function or service, or additional function or service related to the request, and transmit the result of the execution to the electronic device (101). The electronic device (101) may provide the result as is or additionally processed as at least part of the response to the request. For this purpose, for example, cloud computing, distributed computing, mobile edge computing (MEC), or client-server computing technology may be used. The electronic device (101) may provide ultra-low latency services using, for example, distributed computing or mobile edge computing. In another embodiment, the external electronic device (104) may include an Internet of Things (IoT) device. The server (108) may be an intelligent server using machine learning and / or neural networks. According to one embodiment, the external electronic device (104) or the server (108) may be included within a second network (199).The electronic device (101) can be applied to intelligent services (e.g., smart home, smart city, smart car, or healthcare) based on 5G communication technology and IoT-related technology.

[0043] FIG. 2 is a block diagram showing the schematic configuration of an electronic device according to one embodiment.

[0044] Referring to FIG. 2, an electronic device (201) according to one embodiment (e.g., electronic device 101 of FIG. 1)) may include a processor (220), a charger (or charging circuit) (250), a battery (270), and a system (280).

[0045] Referring to FIG. 2, an electronic device (201) according to one embodiment (e.g., electronic device (101) of FIG. 1) may include a connector (210), an over voltage protection (OVP) (215), a processor (220), a coil (240), a rectifier circuit (245), a charger (or charging circuit) (250), a battery package (260) (which may include a battery (270)), and a system (280). An electronic device (201) according to one embodiment may be configured to include various additional components, not limited thereto, or to exclude some of the components. An electronic device (201) according to one embodiment may further include all or part of the electronic device (101) shown in FIG. 1.

[0046] According to one embodiment, the processor (220) can control the overall operation of the electronic device (201). For example, the processor (220) may be implemented identically or similarly to the processor (120) of FIG. 1. According to one embodiment, the processor (220) can control at least one other component (e.g., hardware or software component) of the electronic device (201) connected to the processor (220) by executing software (e.g., program (140) of FIG. 1), and can perform data processing or operations based on instructions. According to one embodiment, the instructions may include instructions composed of machine language that can be processed by the electronic device (201) or the processor (220). For example, the instructions may include instructions corresponding to operation instructions used in the program.

[0047] Meanwhile, although FIG. 2 illustrates that the electronic device (201) includes one processor (220), this is exemplary and the technical concept of the present invention may not be limited thereto. For example, the electronic device (201) may include at least one processor. For example, the processor (220) may be implemented as at least one processor.

[0048] According to one embodiment, the electronic device (201) may further include a memory (e.g., memory (130) of FIG. 1). The memory may store at least one instruction (or instruction) that causes at least one operation of the electronic device (201). When executed by the processor (220), the at least one instruction may cause the electronic device (201) to perform the corresponding operation.

[0049] According to one embodiment, an electronic device (201) may receive power via a wired or wireless connection from an external power supply (202) (or power transmitter, external power supply) (e.g., travel adapter (TA)) through a connector (210) (or a wired interface). For example, the electronic device (201) may receive the required power based on power having various voltage sizes supported by the external power supply (202). For example, the external power supply (202) may be implemented as a power transmitter that supports AVS (adjustable voltage supply). For example, the external power supply (202) that supports AVS may transmit power in the range of 9 to 20 V to the electronic device (201) based on the USB-PD (power delivery) 3.2 standard.

[0050] According to one embodiment, the connector (210) (e.g., wired interface) may include a connection part (e.g., USB port) that can be connected to an external power supply unit (202). For example, the connector (210) may further include a power delivery (PD) IC (not shown) for receiving power via a wire. Depending on the implementation, the PD IC may be implemented as a separate configuration from the wired interface. The PD IC may request power required by the electronic device (201) from the power transmitter under the control of the processor (220).

[0051] According to one embodiment, when the electronic device (201) receives power via a wire, the electronic device (201) may use the wire interface as a communication circuit. In this case, a separate communication circuit may be omitted. For example, the electronic device (201) may request the external power supply (202) to change the voltage of the power by a determined change value through the wire interface. Depending on the implementation, the electronic device (201) may further include a separate communication circuit. The electronic device (201) may request the external power supply (202) to change the voltage of the power by a determined change value through the communication circuit.

[0052] According to one embodiment, when the electronic device (201) receives power wirelessly, the electronic device (201) may communicate with an external power supply based on a communication method for wireless charging (e.g., Amplitude Shift Keying (ASK) or Frequency Shift Keying (FSK) method). For example, the electronic device (201) may include a separate communication circuit for wireless charging. For example, the electronic device (201) may request the external power supply (202) to change the voltage of the power by a determined change value through the communication circuit.

[0053] According to one embodiment, the OVP (215) can perform the function of protecting the charger (250) from power supplied via wire from an external power transmitter. For example, the OVP (215) can perform an overvoltage protection function. For example, the OVP (215) can cut off power having a voltage greater than a specified voltage.

[0054] According to one embodiment, the electronic device (201) can receive power wirelessly from an external wireless power transmitter (e.g., TX device) (203) through a coil (240). For example, the coil (240) can receive power by electromagnetic induction or resonant induction. The alternating current power received through the coil (240) can be rectified into direct current power through a rectifier circuit (245). Additionally, the rectified direct current power can be input or supplied to a charger (250).

[0055] According to one embodiment, the charger (250) may receive power provided from an external power supply unit (202) via an OVP (215). The charger (250) may generate power to charge the battery (270) based on the received power. For example, the charger (250) may support fast charging. Alternatively, the charger (250) may generate power to provide to the system (280) based on the received power. For example, the charger (250) may convert the voltage of the received power to a voltage required by the battery (270) (e.g., 5V). For example, the charger (250) may convert the voltage of the received power to a voltage required by the system (280). For example, the charger (250) may convert the voltage of the received power to a specified ratio (e.g., 4:1 ratio, 3:1 ratio, or 2:1 ratio). The charger (250) can supply power having a converted voltage to the battery (270). Alternatively, the charger (250) can supply power having a converted voltage to the system (280). For example, the charger (250) may include at least one of a direct charger, a switched capacitor voltage converter, or a switched capacitor voltage divider (SCVD). Although the terms "SCVD" and "charger SCVD" are used in the examples and embodiments below, it will be understood that the charger is not limited to an SCVD charger and any suitable charger may be used.

[0056] According to one embodiment, the charger (250) may convert power stored in the battery (270) according to a specified ratio and supply or provide the converted power to the system (280). Alternatively, the charger (250) may convert the voltage of power provided from an external source according to a specified ratio and supply or provide the converted power to the system (280). For example, the charger (250) may convert (or convert) power (e.g., power stored in the battery (270) or power provided from an external source) to a voltage required by the system (280) and supply or provide the converted power to the system (280).

[0057] According to one embodiment, the battery package (260) may include a protection circuit module (PCM) (265) and a battery (270).

[0058] According to one embodiment, the protection circuit module (PCM) (265) can perform the function of protecting the battery (270). For example, the protection circuit module (PCM) (265) can perform the function of battery protection (e.g., over temperature protection (OTP), over voltage protection (OVP), under voltage protection (UVP), and / or over current protection (OCP)). For example, the battery protection module (PCM) (265) can cut off power supplied to or discharged from the battery (270) based on performing the battery protection function.

[0059] According to one embodiment, the battery (270) can store power provided from the charger (250). For example, the battery (270) may include at least one battery cell.

[0060] According to one embodiment, the processor (220) can charge the battery (270) using a charger (SCVD) (250) based on receiving power (e.g., receiving power via wire) from an external power supply (202) that supports an AVS (adjustable voltage supply).

[0061] According to one embodiment, the processor (220) can check (or monitor) a first voltage and a first current input to the charger (SCVD) (250). The processor (220) can check (or monitor) a second voltage and a second current input to the battery (270). For example, the processor (220) can check the first voltage and a first current input to the charger (SCVD) (250) and the second voltage and a second current input to the battery (270) while charging the battery (270) using the charger (SCVD) (250). For example, the processor (220) can check the first voltage, the first current, the second voltage, and the second current based on data received from the AC-DC converter (ADC) or fuel gauge of the charger (SCVD) (250).

[0062] According to one embodiment, the processor (220) can calculate a resistance value (e.g., equivalent resistance value) corresponding to the input terminal of the charger (SCVD) (250) and a resistance value (e.g., equivalent resistance value) corresponding to the output terminal of the charger (SCVD) (250) based on verifying a first voltage, a first current, a second voltage, or a second current. For example, when the first voltage / first current is verified at a first time point, the processor (220) can verify the voltage difference / current difference between the first voltage / first current verified at a time point prior to the first time point and the first voltage / first current verified at the first time point. Additionally, when the second voltage / second current is verified at the first time point, the processor (220) can verify the voltage difference / current difference between the second voltage / second current verified at a time point prior to the first time point and the second voltage / second current verified at the first time point. The processor (220), using at least one of the identified voltage differences / current differences, determines a resistance value (e.g., a first resistance) corresponding to the equivalent resistance from the power of the external power supply (202) to the input terminal of the charger (SCVD) (250), a resistance value (e.g., a second resistance (RCH) in FIG. 3b), and a third resistance (n 2 RDCR)) can be calculated. For example, the first resistor (RT) may be the equivalent resistance from the power of the external power supply (202) to the input terminal of the charger (SCVD) (250). For example, the second resistor (RCH) may be the equivalent resistance from the output terminal of the charger (SCVD) (250) to the input terminal of the battery (270). The third resistor (n 2 RDCR) may be the internal resistance (or equivalent resistance of the internal circuit) of the battery (270). For example, the power of the external power supply (202) may be the power supply circuit of the TA device when the external power supply (202) is a TA device. Or, the power of the external power supply (202) may be the coil (240) of the electronic device (201) when the external power supply (202) transmits power wirelessly.

[0063] According to one embodiment, the processor (220) has a resistance value corresponding to the equivalent resistance from the power of the external power supply (202) to the input terminal of the charger (SCVD) (250) (e.g., the first resistance (RT) in FIG. 3b), a resistance value corresponding to the output terminal of the charger (SCVD) (250) (e.g., the second resistance (RCH) in FIG. 3b), and a third resistance (n 2 A first change value for changing the voltage of power (e.g., power provided by the external power supply (202) or wireless power transmitter (203)) can be checked or calculated using an RDCR). For example, the processor (220) can check or calculate the first change value in response to checking a voltage change condition for changing the voltage of said power to the external power supply (202). For example, the voltage change condition may indicate a condition for changing the voltage of the power provided by the external power supply (202). For example, the voltage change condition may include an action of requesting a voltage change from the external power supply (202) to maintain a CV charging state or a CC charging state. For example, the first change value may include a value indicating how much the voltage of the power previously provided by the external power supply (202) will be changed. For example, the first change value may include a positive value or a negative value.

[0064] According to one embodiment, when a voltage change condition is confirmed, the processor (220) may request the external power supply (202) to change the voltage of the power provided by the external power supply (202) by a first change value. The processor may request the change from the external power supply (202) through a communication circuit (e.g., through a connector (210)). According to one embodiment, the processor (220) may request the external power supply (202) to change the voltage of the power provided by the external power supply (202) to a voltage different from the voltage of the power previously provided by the external power supply (202), taking into account the first change value.

[0065] According to one embodiment, the processor (220) can determine whether the calculated second resistance has been affected by the load fluctuation when a load fluctuation caused by the system (280) is detected. For example, the processor (220) can determine that a load fluctuation caused by the system (280) has occurred based on confirming that the calculated second resistance is lower than a reference value or confirming a load current corresponding to the load of the system (280). For example, the load fluctuation may occur when an application of the electronic device (201) is executed while charging the battery (270) using the charger (250).

[0066] According to one embodiment, the processor (220) can compensate for the second resistance reduced by load fluctuation based on confirming that the calculated second resistance is affected by load fluctuation. For example, the processor (220) can calculate the compensated second resistance. The processor (220) can determine a first change value using the compensated second resistance. For example, the processor (220) can determine the first change value to satisfy the CV condition using the compensated second resistance in response to confirming that, in the CV (constant voltage) charging state of the battery (270), the second voltage of the battery (270) is greater than the input target voltage of the battery (270). For example, the processor (220) can determine a first change value to satisfy the CC condition using a compensated second resistor in response to confirming that, in the CC (constant current) charging state of the battery (270), the first current of the charger (e.g., SCVD) (250) is lower than the input target current of the charger (250).

[0067] According to one embodiment, the processor (220) can compensate for the second resistance reduced by load fluctuations and voltage changes based on determining that the calculated second resistance is affected by both load fluctuations and voltage changes. For example, the processor (220) can compensate for the second resistance by taking into account load fluctuations and voltage changes.

[0068] According to one embodiment, when a load fluctuation caused by the system (280) is detected, the processor (220) may calculate a new second resistance instead of compensating for the calculated second resistance. For example, the processor (220) may newly detect a first voltage, a first current, a second voltage, and a second current based on detecting the load fluctuation, and may newly calculate (or detect) a first resistance, a second resistance, and a third resistance using at least one of the newly detected first voltage, a first current, a second voltage, and a second current. The processor (220) may newly determine a first change value using the newly calculated resistances.

[0069] The external power supply (202) can transmit power having a voltage in the range of 9 to 20 V to the electronic device (201) based on the AVS method. However, unlike the PPS (programmable power supply) method, the AVS method does not have a current limit function. The minimum voltage change size of the AVS method is also specified as 100 mV.

[0070] For example, the AVS method has no current limiting function, and the minimum voltage change size is 100mV, which is larger than that of the conventional PPS, so the charging of the battery (270) can be cut off by the overvoltage protection function or overcurrent protection function of the protection circuit module (PCM) (265) included in the battery package (260). In addition, the series resistance value (e.g., equivalent resistance value) for the path from the external power supply (202) to the battery (270) can change. For example, in the AVS method, the total resistance can change depending on the specifications and length of the cable connecting the external power supply (202) and the cable (210). In addition, the resistance value of the path from the external power supply (202) to the battery (270) can change depending on the temperature, and the equivalent resistance of the charger (250) and the equivalent resistance of the battery can change depending on the load by the system (280).

[0071] According to one embodiment, the electronic device (201) may request a voltage change from the external power supply (202) so that the charging of the battery is not interrupted by the overvoltage protection function or overcurrent protection function of the protection circuit module (PCM) (265) when the charger (250) charges the battery (270) using the AVS method. According to one embodiment, the electronic device (201) may check (or calculate) the series resistance value (e.g., equivalent resistance value) of the path from the external power supply (202) to the battery (270), and based on the checked series resistance value, request a voltage change from the external power supply (202) so that conditions for the target voltage (or input target voltage) to be input to the battery (270) and the target current (or input target current) to be input to the charger (250) can be satisfied.

[0072] FIGS. 3a and FIGS. 3b are circuit diagrams for an external power supply and an electronic device according to one embodiment.

[0073] Referring to FIG. 3a, according to one embodiment, the first equivalent circuit (301) may represent series resistances for the path from the external power supply (202) to the battery (270) in the electronic device (201) of FIG. 2.

[0074] According to one embodiment, the external power supply (202) can output power having a voltage of "VTH". The battery (270) can output a voltage of "VB". The first voltage input to the charger (250) may be "VIN", and the second voltage input to the battery (270) may be "VBAT". The first current input to the charger (250) may be "IIN", and the second current input to the battery (270) may be "IBAT".

[0075] According to one embodiment, the series resistors may include, in the first equivalent circuit (301), an equivalent resistor (RTA) for an external power supply (202), an equivalent resistor (RC) for a cable, an equivalent resistor (RF) for a flexible printed circuit board (FPCB) connected to a connector (210), an equivalent resistor (ROVP) for an OVP (215), an equivalent resistor (RDC) for a charger (250), an equivalent resistor (RP) for a PCM (265), and an equivalent resistor (RDCR) for a battery (270).

[0076] According to one embodiment, the first equivalent circuit (301) may include an inductor (L) for changing the voltage at a specified ratio (n:1) (e.g., an inductor included in the charger (250)). For example, n may represent a natural number greater than or equal to 1. For example, the inductor (L) included in the first equivalent circuit (301) may be a model for an equivalent transformer for expressing a variable voltage, and the actual charger (250) may not include the inductor (L).

[0077] Referring to FIG. 3b, according to one embodiment, the second equivalent circuit (302) may be an equivalent circuit corresponding to the first equivalent circuit (301) of FIG. 3a. The second equivalent circuit (302) comprises a first resistor (RT), a second resistor (RCH), and a third resistor (n 2 It may include RDCR). For example, the first resistor (RT) may be an equivalent resistor corresponding to the input terminal of the charger (250) (e.g., the equivalent resistor from the external power supply (202) to the input terminal of the charger (250). The second resistor (RCH) and the third resistor (n 2RDCR) may be an equivalent resistance corresponding to the output terminal of the charger (250) (e.g., equivalent resistance from the output terminal of the charger (250) to the battery (270). For example, the first resistance (RT) may represent a resistance value obtained by adding the equivalent resistance (RTA) for the power of the external power supply unit (202) (e.g., power supply circuit of the external power supply unit (202) or coil (240) of the electronic device (201)), the equivalent resistance (RC) for the cable, the equivalent resistance (RF) for the FPCB connected to the connector (210), and the equivalent resistance (ROVP) for the OVP (215). For example, when the electronic device (201) receives power wirelessly from the TX device (203), the first resistance (RT) may represent an equivalent resistance corresponding to the inverter, coil, and rectifier included in the electronic device (201). The second resistor (RCH) is the equivalent resistance (RDC) for the charger (250) and the equivalent resistance (n) for the PCM (265). 2 It can represent the resistance value obtained by adding RP). The third resistor (n 2 RDCR) can represent the equivalent resistance to the battery (270).

[0078] According to one embodiment, the external power supply (202) may output power having an equivalent voltage of "VTH". The equivalent voltage of the battery (270) may be "nVB" (e.g., n*VB). A first voltage corresponding to the equivalent voltage input to the charger (250) may be "VIN", and a second voltage corresponding to the equivalent voltage input to the battery (270) may be "nVBAT" (e.g., n*VBAT). A first current corresponding to the equivalent current input to the charger (250) and the battery (270) may be "IIN".

[0079] FIGS. 4a and FIGS. 4b are equivalent circuit diagrams of an electronic device for changing the voltage of power output from an external power supply according to one embodiment.

[0080] Referring to FIG. 4a, according to one embodiment, the third equivalent circuit (401) may represent series resistances for the path from the external power supply (202) to the battery (270) when the external electronic device (202) changes voltage. For example, the voltage (VB) output by the battery (270) when the voltage changes may be constant (or assumed to be constant).

[0081] According to one embodiment, the third equivalent circuit (401) may include a first resistor (RT), a second resistor (RCH), and an equivalent resistor (RDCR) for the battery (270).

[0082] Referring to FIG. 4b, according to one embodiment, the fourth equivalent circuit (402) may be an equivalent circuit corresponding to the third equivalent circuit (401) of FIG. 4a. The fourth equivalent circuit (402) comprises a first resistor (RT), a second resistor (RCH), and a third resistor (n 2 It may include RDCR). For example, "ΔRIN" may include a second resistor (RCH) and a third resistor (n 2 It can be a resistor corresponding to the value of the sum of RDCR.

[0083] According to one embodiment, the change value of power provided by the external power supply unit (202) can be represented as "ΔVTH". The change amount of voltage input to the charger (250) can be represented as "ΔVIN". For example, the change amount of voltage input to the charger (250) ΔVIN may be a change caused by the change value of power ΔVTH provided by the external power supply unit (202). For example, the change amount of voltage input to the charger (250) ΔVIN may be a change between the initial state (or previous measurement value) and the current state (or measurement value). The change amount of voltage input to the battery (270) can be represented as "ΔVBAT". For example, the change amount of voltage ΔVBAT input to the charger (250) may be a change caused by the change value of power ΔVTH supplied by the external power supply unit (202). For example, the amount of change in voltage ΔVBAT input to the charger (250) may be the change between the initial state (or previous measurement) and the current state (or measurement).

[0084] Examples of voltage changes for the external power supply (202) described below will be explained based on the fourth equivalent circuit (402) of FIG. 4b.

[0085] Meanwhile, at least some of the operations of the electronic device described below may be controlled or performed by the processor (220). However, for the convenience of explanation, the subject of the operations will be described as the electronic device (201).

[0086] FIG. 5 is a flowchart illustrating a method for requesting an electronic device to change the voltage of power to an external power supply device according to one embodiment.

[0087] Referring to FIG. 5, according to one embodiment, in operation 501, an electronic device (e.g., electronic device (201) of FIG. 2) can charge a battery (e.g., battery (270) of FIG. 2) using an SCVD (e.g., charger (250) of FIG. 2) based on receiving power from an external power supply (e.g., external power supply (202) of FIG. 2). For example, the external power supply may support an adjustable voltage supply (AVS). For example, the power may be received through a connector (e.g., connector (210) of FIG. 2).

[0088] According to one embodiment, in operation 503, the electronic device (201) can check the first voltage (VIN) and first current (IIN) input to the SCVD (250) and the second voltage (VBAT) and second current (IBAT) input to the battery (270) while charging the battery (270). For example, the electronic device (201) can check the amount of change in the voltage / current input to the SCVD (250) and the amount of change in the voltage / current input to the battery (270).

[0089] According to one embodiment, in operation 505, the electronic device (201) can identify or calculate the first resistance (RT), which is the equivalent resistance from the power of the external power supply (202) to the input terminal of the SCVD (250), the second resistance (RCH), which is the equivalent resistance from the output terminal of the SCVD (250) to the input terminal of the battery (270), and the third resistance (RDCR), which is the internal resistance of the battery (270), using at least one of the first voltage (VIN), the first current (IIN), the second voltage (VBAT), or the second current (IBAT).

[0090] According to one embodiment, in operation 507, the electronic device (201) can determine a first change value for changing the voltage using a first resistor (RT), a second resistor (RCH), and a third resistor (RDCR), based on determining a voltage change condition for changing the voltage of the power received from the external power supply (202). For example, the electronic device (201) can determine that the voltage of the power received from the external power supply (202) should be changed by the first change value based on the determined voltage change condition. According to one embodiment, when starting to charge the battery (270) using the SCVD (250), the electronic device (201) can determine the first change value such that the expected input voltage of the battery (270) corresponds to (or matches, is the same as) the target input voltage of the battery (270). According to one embodiment, the electronic device (201) may determine a first change value to satisfy the CV condition in response to confirming that, in the CV (constant voltage) charging state of the battery (270), the second voltage (VBAT) of the battery (270) is greater than the input target voltage of the battery (270). For example, the electronic device (201) may determine (or calculate) the first change value such that changing the voltage of the power received from the external power supply (202) by the first change value satisfies the constant voltage (CV) condition. According to one embodiment, the electronic device (201) may determine a first change value to satisfy the CC condition in response to confirming that, in the CC (constant current) charging state of the battery (270), the first current (IIN) of the SCVD (250) is lower than the input target current of the SCVD (250). For example, the electronic device (201) can determine (or calculate) a first change value such that changing the voltage of the power received from the external power supply (202) by a first change value satisfies the constant voltage (CC) condition.

[0091] According to one embodiment, in operation 509, the electronic device (201) may request the external power device (202) to change the voltage of the power by a first change value. For example, the request may be made through a communication circuit (e.g., through a connector (210)). The external electronic device (202) may transmit power (e.g., voltage and / or current) with the voltage changed by the first change value to the electronic device (201) based on the confirmation of the request. The electronic device (201) may receive power (e.g., voltage and / or current) with the voltage changed by the first change value from the external electronic device (202) in accordance with the confirmed request. According to one embodiment, after starting the charging of the battery (270) using the SCVD (250), power of a voltage not higher than the threshold for overvoltage protection of the PCM (265) may be provided to the battery (270) by the power transmitted by the external electronic device (202). According to one embodiment, power of a voltage corresponding to the input target voltage of the battery (270) can be provided to the battery (270) by power transmitted by an external electronic device (202) in the CV charging state of the battery (270). According to one embodiment, power of a current corresponding to the input target current of the charger (250) can be provided to the charger (250) by power transmitted by an external electronic device (202) in the CC charging state of the battery (270).

[0092] FIG. 6 is a flowchart for more specifically explaining a method for an electronic device to request an external power supply to change the voltage of the power according to one embodiment.

[0093] Referring to FIG. 6, according to one embodiment, in operation 601, an electronic device (e.g., electronic device (201) of FIG. 2) may be connected to an external power supply (TA) (e.g., external power supply (202) of FIG. 2) by wire (or wirelessly).

[0094] According to one embodiment, in operation 603, the electronic device (201) can perform an initial setting for receiving power. For example, the electronic device (201) can input an initial current and an initial voltage according to the initial setting to the charger (250).

[0095] According to one embodiment, in operation 605, the electronic device (201) can check the first voltage / first current input to the SCVD (250) and the second voltage / second current input to the battery (270) in an initial setting state before starting to charge the battery using the SCVD (e.g., charger (250) of FIG. 2).

[0096] According to one embodiment, in operation 607, the electronic device (201) can start an operation to charge the battery (270) using the SCVD (250).

[0097] According to one embodiment, in operation 609, the electronic device (201) can check the first voltage / first current input to the SCVD (250) and the second voltage / second current input to the battery (270) during battery (270) charging. For example, the electronic device (201) can check the first voltage / first current and the second voltage / second current in a designated period or in real time. For example, the electronic device (201) can check or calculate the amount of change in the first voltage / first current input to the SCVD (250) and the amount of change in the second voltage / second current input to the battery (250) between the initial setting state and after charging has started.

[0098] According to one embodiment, in operation 611, the electronic device (201), while charging the battery (270), has a first resistor (RT), a second resistor (RCH), and a third resistor (n 2RDCR) can be calculated. For example, the electronic device (201) can calculate the first resistance (RT), the second resistance (RCH), and the third resistance (n) using at least one of the first voltage / first current input to the SCVD (250) during battery (270) charging, the second voltage / second current input to the battery (270), the amount of change of the first voltage / first current, and the amount of change of the second voltage / current. 2 You can calculate or verify RDCR.

[0099] For example, the electronic device (201) can calculate the first resistance (RT) using VTA (0) according to the initial setting (e.g., the voltage initially assigned to the SCVD before charging begins), ΔVTAtotal (N) representing the accumulated ΔVTA (where N represents the order / index of the accumulated voltage change and is a natural number greater than or equal to 1), and the first voltage (VIN) (e.g., the first voltage (VIN) input to the SCVD), as in Equation 1. For example, VTA (0) may be the initial voltage of the charger (250) described in Operation 603.

[0100]

[0101] For example, the electronic device (201) can calculate the second resistance (RCH) using the first voltage (VIN), the first current (IIN), and the second voltage (e.g., n*VBAT) as in Equation 2.

[0102]

[0103] For example, the electronic device (201) can calculate the third resistance (RDCR) using the change amount of the first voltage (VIN) (ΔVIN), the change amount of the first current (IIN) (ΔIIN), and the second resistance (RCH), as in Equation 3. For example, the change amount of the first voltage (VIN) (ΔVIN) can be determined as the difference between the previous (or initial) first voltage and the current first voltage, i.e., ΔVIN(N) = VIN(N) - VIN(N-1). Likewise, the change amount of the first current (IIN) (ΔIIN) can be determined as the difference between the previous (or initial) first current and the current first current, i.e., ΔIIN(N) = IIN(N) - IIN(N-1).

[0104]

[0105] Alternatively, the electronic device (201) may calculate the third resistance (RDCR) as in Equation 4 when it can determine the change amount (ΔVBAT) of the second voltage (VBAT) and the change amount (ΔIBAT) of the second current (IBAT). For example, the change amount (ΔVBAT) of the second voltage (VBAT) can be determined as the difference between the previous (or initial) second voltage and the current second voltage, i.e., ΔVBAT(N) = VBAT(N) - VBAT(N-1). Likewise, the change amount (ΔIBAT) of the second current (IBAT) can be determined as the difference between the previous (or initial) second current and the current second current, i.e., ΔIBAT(N) = IBAT(N) - IBAT(N-1).

[0106]

[0107] According to one embodiment, in operation 613, the electronic device (201) can determine a first change value (ΔVTH) for requesting a voltage change from an external power supply (202) using a first resistor (RT), a second resistor (RCH), and a third resistor (RDCR). For example, a method for determining the first change value (ΔVTH) will be specifically described in FIG. 7.

[0108] According to one embodiment, in operation 615, the electronic device (201) can check whether a voltage change condition has been confirmed or detected. For example, if a voltage change condition has not been confirmed or detected (No in operation 615), the electronic device (201) may not request a voltage change from the external power supply (202). Additionally, the electronic device (201) can check the first voltage / first current and the second voltage / second current again. For example, the electronic device (201) can reconfirm the first voltage / first current and the second voltage / second current according to a specified cycle.

[0109] According to one embodiment, when it is confirmed that a voltage change condition is confirmed or detected (e.g., operation 615), in operation 617, the electronic device (201) may request the external power supply (202) to change the voltage of the power by a first change value (ΔVTH). The external power supply (202) may transmit the power with the voltage changed by the first change value (ΔVTH) to the electronic device (201).

[0110] FIG. 7 is a flowchart illustrating a method for determining a change value for requesting an electronic device to change the voltage of power to an external power supply device, according to one embodiment.

[0111] Referring to FIG. 7, according to one embodiment, in operation 701, an electronic device (e.g., electronic device (201) of FIG. 2) can check a first voltage / first current of an SCVD (e.g., charger (250) of FIG. 2) and a second voltage / second current of a battery (e.g., battery (270) of FIG. 2). For example, the electronic device (201) can check or calculate the amount of change of the first voltage / first current input to the SCVD (250) and the amount of change of the second voltage / second current input to the battery (250).

[0112] According to one embodiment, in operation 703, the electronic device (201) can calculate a first resistance (RT), a second resistance (RCH), and a third resistance (RDCR). For example, the first resistance (RT), the second resistance (RCH), and the third resistance (RDCR) can be calculated based on what is described in FIG. 6.

[0113] According to one embodiment, in operation 705, the electronic device (201) can check or calculate a first change value (ΔVTH). For example, the electronic device (201) can calculate the first change value (ΔVTH) as in Equation 5. Here, Itarget may be the input target current to the SCVD (250).

[0114]

[0115] According to one embodiment, when the electronic device (201) receives power of a voltage changed by a first change value (ΔVTH) from an external power supply (202), it can predict or verify a second voltage (hereinafter, expected battery voltage (VBAT_NEXT)) input to the battery (270). For example, the electronic device (201) can calculate the expected battery voltage (VBAT_NEXT or VBATNEXT) as in Equation 6. Here, N and n may be natural numbers greater than or equal to 1, and N may represent the accumulated voltage change order / index.

[0116]

[0117] According to one embodiment, in operation 707, the electronic device (201) can check whether the expected battery voltage (VBAT_NEXT) is below the input target voltage of the battery (270).

[0118] According to one embodiment, if it is determined that the expected battery voltage (VBAT_NEXT) is not below the input target voltage of the battery (270) (No in operation 707), then in operation 709, the electronic device (201) may reduce the input target current (Itarget). For example, if it is determined that the expected battery voltage (VBAT_NEXT) exceeds the input target voltage of the battery (270), the electronic device (201) may set the input target current (Itarget) anew (e.g., reduce) to meet the conditions of operation 707 in order to change the first change value. For example, the electronic device (201) may set a new input target current (Itargetnew) as in Equation 7. Here, VFLOAT may be the input target voltage of the battery (270).

[0119]

[0120] Afterward, the electronic device (201) can re-check the first change value (ΔVTH) based on the new input target current (Itargetnew). For example, the first change value (ΔVTH) can be reduced to a lower value than before.

[0121] According to one embodiment, if it is confirmed that the expected battery voltage (VBAT_NEXT) is less than or equal to the input target voltage of the battery (270) (e.g., operation 707), in operation 711, the electronic device (201) can check whether the charge state of the battery (270) satisfies the CV condition. For example, the CV condition may be satisfied if the expected battery voltage (VBAT_NEXT) of the battery (270) is greater than or equal to the input target voltage.

[0122] According to one embodiment, if it is determined that the charge state of the battery (270) does not satisfy the CV condition (or, if it satisfies the CC condition) (No in operation 711), in operation 713, the electronic device (201) can determine whether the first change value (ΔVTH) is greater than or equal to the minimum voltage change value (e.g., 100mV) of the external power supply (TA) (202).

[0123] According to one embodiment, if it is confirmed that the first change value (ΔVTH) is not greater than the minimum voltage change value of the external power supply (TA) (202) (No in operation 713), the electronic device (201) can re-check the first voltage / first current of the SCVD (250) and the second voltage / second current of the battery (270) without requesting a voltage change from the external power supply (202).

[0124] According to one embodiment, if it is confirmed that the first change value (ΔVTH) is greater than or equal to the minimum voltage change value of the external power supply (TA) (202) (e.g., operation 713), in operation 715, the electronic device (201) may request the external power supply (TA) (202) to change the voltage by the first change value (ΔVTH). For example, the first change value (ΔVTH) may be determined as in Equation 8. For example, the first change value (ΔVTH) may be rounded down in units of 100mV. For example, in a CC charging state, Itargetnew(N)=Itarget=IIN(N) may be maintained.

[0125]

[0126] For example, the electronic device (201) may request the external power supply (TA) (202) to increase the voltage by a first change value (ΔVTH).

[0127] According to one embodiment, when it is confirmed that the charge state of the battery (270) satisfies the CV condition (e.g., operation 711), in operation 717, the electronic device (201) can check whether the second voltage (VBAT) input to the battery (270) is greater than or equal to the input target voltage of the battery (270).

[0128] According to one embodiment, if it is confirmed that the second voltage (VBAT) is greater than or equal to the input target voltage of the battery (270) (e.g., operation 717), in operation 719, the electronic device (201) may request the external power supply (TA) (202) to change the voltage by a first change value (ΔVTH). For example, the first change value (ΔVTH) may be determined as in Equation 9. For example, the first change value (ΔVTH) may be rounded up in units of 100mV. For example, in a CV charging state, Itargetnew(N) may represent the no-load value of IIN(N).

[0129]

[0130] For example, the electronic device (201) may request the external power supply (TA) (202) to reduce the voltage by the magnitude of the first change value (ΔVTH).

[0131] According to one embodiment, if it is confirmed that the second voltage (VBAT) is less than the input target voltage of the battery (270) (No in operation 717), the electronic device (201) can re-check the first voltage / first current of the SCVD (250) and the second voltage / second current of the battery (270) without requesting a voltage change from the external power supply (202).

[0132] FIG. 8 is a graph illustrating a method for determining a change value to request a voltage change from an external power supply when an electronic device starts charging a battery using an SCVD according to one embodiment.

[0133] Referring to FIG. 8, according to one embodiment, an electronic device (e.g., the electronic device (201) of FIG. 2) can set a new input target current (Itarget=5A) when it is confirmed that the expected battery voltage (VBAT_NEXT) is greater than the input target voltage (e.g., 4.45V). The electronic device (201) can set a new input target current (Itarget_new=1.3A) so that the expected battery voltage (VBAT_NEXT) corresponds to (or matches, is the same as) the input target voltage. The electronic device (201) can determine a first change value (ΔVTH) based on the new input target current (Itarget_new=1.3A). For example, the first change values ​​(ΔVTH) may be sequentially 0mV, 600mV, and -100mV.

[0134] FIG. 9 is a graph illustrating a method for determining a change value for which an electronic device requests a voltage change from an external power supply in a constant voltage (CV) charging state of a battery, according to one embodiment.

[0135] Referring to FIG. 9, according to one embodiment, an electronic device (e.g., the electronic device (201) of FIG. 2) can determine an expected battery voltage (VBAT_NEXT) that is expected to be input to the battery (270) in the CV charging state of the battery (270). If it is determined that the expected input voltage of the battery (270) is greater than the input target voltage (e.g., 4.45V), a first change value (ΔVTH) can be determined so that the expected input voltage of the battery (270) corresponds to (or is equal to) the input target voltage. By requesting the first change value, the voltage of the power transmitted by the external power supply (202) can be reduced. Accordingly, the first current (IIN) input to the charger (250) can be reduced when the voltage changes. For example, in the CV charging state of the battery (270), the input expected voltage of the battery (270) corresponds to (or matches) the second voltage input to the battery (270), so the new target current (Itarget_new) can match (or, match, be the same) the first current (IIN) input to the charger (250).

[0136] FIG. 10 is a graph illustrating a method for determining a change value for which an electronic device requests a voltage change from an external power supply in a constant current (CC) charging state of a battery, according to one embodiment.

[0137] Referring to FIG. 10, according to one embodiment, an electronic device (e.g., the electronic device (201) of FIG. 2) can determine a first current (IIN) input to a charger (250) in the CC charging state of the battery (270). If it is determined that the first current (IIN) is less than the input target current (e.g., 5A), a first change value (ΔVTH) can be determined so that the first current (IIN) of the charger (250) corresponds to (or matches, is the same as) the input target current. By requesting the first change value, the voltage of the power transmitted by the external power supply (202) can be increased. Accordingly, the first current (IIN) input to the charger (250) can be controlled to correspond to (or match, is the same as) the input target current. Subsequently, the first current (IIN) can be gradually decreased as the battery (270) charges, and the first current can be increased to the target input current based on controlling the first change value. For example, in the CC charging state of the battery (270), the new target current (Itarget_new) of the charger (250) may match (or be the same as) the existing target current (Itarget) and the first current (IIN) input to the charger (250).

[0138] FIG. 11 is an equivalent circuit diagram of an electronic device when a load fluctuation of the system occurs, according to one embodiment.

[0139] Referring to FIG. 11, according to one embodiment, the fifth equivalent circuit (1101) may represent series resistances for the path from the external power supply (202) to the battery (270) when the load changes due to the system (e.g., the system (280) of FIG. 2). For example, when the voltage changes, the voltage (VB) output by the battery (270) may be constant (or assumed to be constant).

[0140] According to one embodiment, the fifth equivalent circuit (1101) may include a first resistor (RT), a second resistor (RCH_L), and an equivalent resistor (RDCR) for the battery (270). For example, the second resistor (RCH_L) may have a resistance value affected by load fluctuations and may be different from the second resistor (RCH) of FIG. 4a.

[0141] According to one embodiment, the amount of fluctuation in the first voltage input to the charger (250) may be "ΔVIN_L", and the amount of fluctuation in the second voltage input to the battery (270) may be "ΔVBAT_L". The amount of fluctuation in the first current input to the charger (250) may be "ΔIIN_L". The current due to the load fluctuation of the system (280) may be ISYS.

[0142] According to one embodiment, a voltage (IIN*(RCH_L-RCH_C)) due to load variation may be applied, and RCH_C may be a resistor that compensates for RCH_L by taking into account load variation.

[0143] According to one embodiment, the fifth equivalent circuit (1101) may include an inductor (L) for changing the voltage at a specified ratio (n:1) (e.g., an inductor included in the charger (250)). For example, n may represent a natural number greater than or equal to 1. For example, the inductor (L) included in the fifth equivalent circuit (1101) may be a model for an equivalent transformer for expressing a variable voltage, and the actual charger (250) may not include an inductor (L).

[0144] The method for determining the resistance values ​​below will be explained based on the equivalent circuit (402) of FIG. 4b and the equivalent circuit (1101) of FIG. 11.

[0145] FIGS. 12a and 12b are flowcharts illustrating a method for an electronic device to determine a resistance value for each state according to one embodiment.

[0146] Referring to FIGS. 12a and 12b, according to one embodiment, in operation 1201, an electronic device (e.g., electronic device (201) of FIG. 2) measures a first voltage / first current of an SCVD (e.g., charger (250) of FIG. 2) and a second voltage / second current of a battery (e.g., battery (270) of FIG. 2) at a first time point based on receiving power from an external power supply (e.g., external power supply (202) of FIG. 2), and can calculate resistance values ​​(e.g., first resistance (RT), second resistance (RCH), and third resistance (RDCR)) based on the measured first voltage / first current and second voltage / second current. For example, the resistance values ​​can be calculated using at least one of Equations 1 to 4.

[0147] According to one embodiment, in operation 1203, the electronic device (201) can check whether to start charging the battery (270) using the SCVD (250).

[0148] According to one embodiment, when it is confirmed that charging of the battery (270) is started using the SCVD (250) (e.g., operation 1203), in operation 1205, the electronic device (201) can compensate for resistance values ​​by taking into account the initial value (or voltage / current according to the initial setting).

[0149] For example, the compensated first resistance (RT(0)) can be calculated as in Equation 10. For example, VTH(0) may be the starting voltage of the external power supply (202) according to the initial setting, and VIN(0) and IIN(0) may be the first voltage and first current input to the charger (250) after the battery (270) starts charging.

[0150]

[0151] For example, the compensated second resistance (RCH(0)) can be calculated as in Equation 11. For example, VBAT(0) may be a second voltage input to the battery (270) after charging begins, and VIN(0) and IIN(0) may be a first voltage and a first current input to the charger (250) after charging of the battery (270) begins.

[0152]

[0153] For example, the compensated third resistance (RDCR(0)) can be calculated as in Equation 12. For example, VBAT(0) and IBAT(0) may be the second voltage and second current input to the battery (270) after charging starts, and VBAT(-1) and IBAT(-1) may be the second voltage and second current input to the battery (270) before charging starts.

[0154]

[0155] According to one embodiment, if it is determined that charging of the battery (270) is not started using the SCVD (250) (No in operation 1203), in operation 1207, the electronic device (201) can determine whether the calculated resistance values ​​were affected by a voltage change of the external power supply (TA) (202) prior to the first time point. For example, the electronic device (201) can determine that the calculated resistance values ​​were affected by a voltage change of the external power supply (TA) (202) if there was a voltage change of the external power supply (TA) (202) after a measurement time point prior to the first time point (e.g., a voltage / current measurement time point).

[0156] According to one embodiment, if it is confirmed that the calculated resistance values ​​were affected by a voltage change of the external power supply (TA) (202) prior to the first time point (e.g., 1207), in operation 1209, the electronic device (201) can determine whether the resistance values ​​calculated at the first time point were affected by a load change. For example, the electronic device (201) can determine that the calculated resistance values ​​were affected by a load change if a load change occurred at the first time point or at a measurement time point prior to the first time point (e.g., a voltage / current measurement time point). For example, the electronic device (201) can determine that the calculated resistance values ​​were affected by a load change based on confirming that the calculated second resistance is lower than a reference value, confirming the load current corresponding to the load of the system (280), or confirming that the value obtained by multiplying the first current (IIN) by n (nIIN) is greater than the second current (IBAT).

[0157] According to one embodiment, if it is confirmed that the resistance values ​​calculated at the first time point have been affected by a load fluctuation (e.g., 1209), in operation 1211, the electronic device (201) can compensate the resistance values ​​by taking into account both the load fluctuation and the voltage change. For example, among the resistance values, the second resistance (RCHC) can be compensated as in Equation 13. Among the resistance values, the first resistance (RT) and the third resistance (RDCR) may not require compensation. Here, i and M may be natural numbers greater than or equal to 1, i may represent the number of voltage changes after a load fluctuation occurs, and M may represent the number of voltage / current measurements after a load fluctuation occurs. ΔIINSL may represent the amount of fluctuation in the first voltage of the charger (250) affected by the load fluctuation and the voltage change. For example, in Equation 13 below, RCHL may be the same as RCH_L of FIG. 11, and RCHC may be the same as RCH_C of FIG. 11.

[0158]

[0159] According to one embodiment, if it is confirmed that the resistance values ​​calculated at the first time point were not affected by load fluctuations (No in 1209), in operation 1213, the electronic device (201) may compensate the resistance values ​​by taking into account the voltage change. For example, the resistance values ​​may be calculated based on previous measured values ​​(e.g., voltage / current) and the measured values ​​at the first time point (e.g., voltage / current). For example, the resistance values ​​may be calculated or compensated using at least one of Equations 1 to 4.

[0160] According to one embodiment, if it is confirmed that the calculated resistance values ​​were not affected by a voltage change of the external power supply (TA) (202) prior to the first time point (No in 1207), in operation 1215, the electronic device (201) can determine whether the resistance values ​​calculated at the first time point were affected by a load change.

[0161] According to one embodiment, if it is confirmed that the resistance values ​​calculated at the first time point have been affected by a load variation (e.g., 1215), in operation 1217, the electronic device (201) can compensate the resistance values ​​by taking into account the load variation. For example, among the resistance values, the second resistance (RCH) can be compensated as in Equation 13. For example, the compensated second resistance (RCH) can be determined using the second resistance (RCHL) due to the load effect, the amount of variation of the first current (ΔIINL) due to the load effect, the first resistance (RT), and the third resistance (nRDCR). Among the resistance values, the first resistance (RT) and the third resistance (RDCR) may not require compensation.

[0162]

[0163] According to one embodiment, the electronic device (201) can determine resistance values ​​in operation 1219. For example, the electronic device (201) may not use a resistance value that differs by more than a reference value among the compensated or calculated resistance values. In this case, the resistance value that differs by more than a reference value may use a previously measured resistance value or the average of the previously measured resistance values.

[0164] The resistance value determined in operation 1219 can be used to determine the first change value (e.g., as in operations 507, 613, and 705).

[0165] For example, the electronic device can compare the resistance values ​​calculated in operation 1201 with the compensated resistance values. If the calculated resistance values ​​differ from the compensated resistance values ​​by more than a reference value, the compensated resistance values ​​may be used as the previously measured resistance values ​​or as the average of the previously measured resistance values. Otherwise, the compensated resistance values ​​may be used to determine the resistance values.

[0166] FIG. 13 is a graph illustrating a method for compensating resistance values ​​when a load variation is detected in an electronic device according to one embodiment.

[0167] Referring to FIG. 13, according to one embodiment, when a load fluctuation (ISYS) occurs, the second resistance (Rcharge) (e.g., second resistance (RCH)) (e.g., about 80 mΩ) calculated by the electronic device (e.g., the electronic device (201) of FIG. 2) may be smaller than the actual resistance value (e.g., about 160 mΩ).

[0168] According to one embodiment, the electronic device (201) can compensate for a second resistance (Rcharge) by taking into account the effect of load fluctuations, as described in FIG. 12a and FIG. 12b. For example, the electronic device (201) can compensate for the second resistance (Rcharge) reduced by load fluctuations and determine a first change value using the compensated second resistance (Rcharge(comp)). For example, the compensated second resistance (Rcharge(comp)) may be nearly the same or similar to the actual resistance value (e.g., 160 mΩ).

[0169] Through the method described above, the electronic device (201) can determine the first change value using a second resistance (Rcharge(comp)) that is nearly similar to the actual resistance value (e.g., 160 mΩ).

[0170] FIG. 14 is a graph illustrating a method for an electronic device to compensate for resistance values ​​according to one embodiment.

[0171] Referring to FIG. 14, according to one embodiment, the electronic device (201) can compensate for a second resistance (Rcharge) by taking into account the effect of load fluctuations as described in FIG. 12a and FIG. 12b. For example, the electronic device (201) can compensate for a second resistance (Rcharge) affected by load fluctuations. For example, the compensated second resistance (Rcharge(comp)) may have an increased resistance value compared to the second resistance (Rcharge) before compensation in the section where the load effect occurred.

[0172] Through the method described above, the electronic device (201) can determine the first change value using a second resistance (Rcharge(comp)) that is nearly similar to the actual resistance value (e.g., 160 mΩ).

[0173] FIG. 15 is a flowchart illustrating a method for determining a resistance value when a load fluctuation is detected in an electronic device, according to one embodiment.

[0174] Referring to FIG. 15, according to one embodiment, in operation 1501, an electronic device (e.g., electronic device (201) of FIG. 2) can charge a battery (e.g., battery (270) of FIG. 2) using an SCVD (e.g., charger (250) of FIG. 2).

[0175] According to one embodiment, in operation 1503, the electronic device (201) can determine whether a load fluctuation has occurred due to the system (e.g., the system (280) of FIG. 2). For example, the electronic device (201) can determine that a load fluctuation has occurred due to the system (280) based on determining that the calculated second resistance is lower than a reference value or determining the load current corresponding to the load of the system (280).

[0176] According to one embodiment, if it is confirmed that no load fluctuation has occurred (No of 1503), the electronic device (201) can charge the battery (270) using the charger (250) without performing additional operations for load fluctuation.

[0177] According to one embodiment, if it is confirmed that a load fluctuation has occurred (e.g., 1503), in operation 1505, the electronic device (201) can measure the first voltage / first current of the SCVD (250) and the second voltage / second current of the battery (270) again.

[0178] According to one embodiment, in operation 1507, the electronic device (201) can recalculate resistance values ​​based on the recalculated voltage / current. The electronic device (201) can determine a first change value to request a voltage change from an external power supply (202) based on the recalculated resistance values.

[0179] Through the method described above, the electronic device (201) can determine the first change value using resistance values ​​(e.g., second resistance (RCH)) that are not affected by load fluctuations.

[0180] FIG. 16 is a graph illustrating a method for determining the point in time when an electronic device calculates a resistance value according to one embodiment.

[0181] Referring to FIG. 16, according to one embodiment, an electronic device (e.g., the electronic device (201) of FIG. 2) may set a blanking interval (1610) after requesting a voltage change from an external power supply (e.g., the external power supply (202) of FIG. 2). For example, the blanking interval (1610) may be set based on a specified time. The electronic device (201) may measure a first voltage (VIN) and a first current (e.g., IIN of FIG. 3a) of an SCVD (e.g., the charger (250) of FIG. 2) after the blanking interval (1610). For example, the electronic device (201) may measure the first voltage (VIN) and the first current of the SCVD (250) again after a specified time corresponding to the blanking interval (1610) after requesting a voltage change from the external power supply (202). For example, the electronic device (201) can measure the first voltage (VIN) and the first current (IIN) of the SCVD (250) in the measurement interval (1620), and calculate or verify the equivalent resistance change amount (ΔRIN) corresponding to the output terminal of the charger (250) based on the measured first voltage (VIN) and the first current (IIN). For example, the measurement interval (1620) may be after the blanking interval (1610).

[0182] According to one embodiment, the electronic device (201) can adjust the designated time corresponding to the blanking interval (1610) to be shorter than the reference time when the battery (e.g., battery (270) of FIG. 2) is in a constant current (CC) charging state. For example, the reference time may be a preset time. For example, when in a CC charging state, the amount of change of the first current (IIN) is proportional to the first change value (ΔVTH), so the designated time corresponding to the blanking interval (1610) can be adjusted to be shorter when the first change value (ΔVTH) is low. For example, when in a CC charging state, the amount of change of equivalent resistance (ΔRIN) corresponding to the output terminal of the charger (250) may be small, so the electronic device (201) can adjust the designated time corresponding to the blanking interval (1610) to be shorter. Through this, the electronic device (201) can increase the accuracy of the equivalent resistance change amount (ΔRIN) corresponding to the output terminal of the charger (250).

[0183] According to one embodiment, the electronic device (201) can adjust the designated time corresponding to the blanking interval (1610) to be longer than the reference time when the battery (270) is in a constant voltage (CV) charging state. For example, since the equivalent resistance change amount (ΔRIN) corresponding to the output terminal of the charger (250) may be large when in a CV charging state, the electronic device (201) can adjust the designated time corresponding to the blanking interval (1610) to be longer. Through this, the electronic device (201) can increase the accuracy of the equivalent resistance change amount (ΔRIN) corresponding to the output terminal of the charger (250).

[0184] According to the methods described above, the electronic device (201) according to one embodiment can charge the battery (270) using the SCVD (250) without the addition of additional hardware when receiving power from an external power supply (202) that supports AVS.

[0185] The methods described above explain embodiments for receiving power via a wire from an external power supply (202) that supports AVS, but the technical concept of the present invention may not be limited thereto. For example, embodiments of the electronic device (201) of the present invention may also be applied when receiving power wirelessly through a TX device (e.g., the TX device (203) of FIG. 2).

[0186] According to one embodiment, the electronic device (201) may include a communication circuit, a battery (270), a switched capacitor voltage divider (SCVD) (250) configured to convert an input voltage into an output voltage supplied to the battery or the system of the electronic device according to a specified ratio, and a processor (220). According to one embodiment, the processor may be configured to charge the battery using the SCVD based on receiving power via a wire from an external power supply (202). According to one embodiment, the processor may be configured to check a first voltage (VIN) and a first current (IIN) input to the SCVD and a second voltage (VBAT) and a second current (IBAT) input to the battery while charging the battery using the SCVD. According to one embodiment, the processor may be configured to calculate a first resistance (RT), which is the equivalent resistance from the external power supply to the input terminal of the SCVD, a second resistance (RCH), which is the equivalent resistance from the output terminal of the SCVD to the input terminal of the battery, and a third resistance (RDCR), which is the internal resistance of the battery, based on checking the first voltage, the first current, the second voltage, or the second current. According to one embodiment, the processor may be configured to request the external power supply to change the voltage of the power by a first change value via the communication circuit in response to checking a voltage change condition to request the external power supply to change the voltage, and the first change value may be checked using at least one of the first resistance, the second resistance, and the third resistance.

[0187] According to one embodiment, the processor may be configured to determine the first change value such that the input expected voltage of the battery corresponds to the input target voltage of the battery, and the input target voltage may correspond to the input target voltage when charging the battery is started using the SCVD.

[0188] According to one embodiment, the processor may be configured to reduce the input target current of the SCVD based on confirming that the input expected voltage of the battery is greater than the input target voltage of the battery. According to one embodiment, the processor may be configured to determine the first change value such that the input target current is input to the SCVD and the input target voltage is input to the battery.

[0189] According to one embodiment, the processor may be configured to determine the first change value to satisfy the CV condition in response to confirming that the second voltage of the battery is greater than the input target voltage of the battery in a constant voltage (CV) charging state of the battery. According to one embodiment, the processor may be configured to request the external power supply to reduce the voltage of the power by the first change value.

[0190] According to one embodiment, the processor may be configured to determine the first change value to satisfy the CC (constant current) condition in response to confirming that the first current of the SCVD is lower than the input target current of the SCVD in the CC (constant current) charging state of the battery. According to one embodiment, the processor may be configured to request the external power supply to increase the voltage of the power by the first change value.

[0191] According to one embodiment, the processor may be configured to check whether the calculated second resistance has been affected by the load variation when a load variation caused by the system of the electronic device is detected. According to one embodiment, the processor may be configured to compensate for the second resistance reduced by the load variation based on the detection that the calculated second resistance has been affected by the load variation.

[0192] According to one embodiment, the processor may be configured to check a compensated second resistance in a constant voltage (CV) charging state of the battery. According to one embodiment, the processor may be configured to determine a first change value to satisfy the CV condition using the compensated second resistance in response to checking that the second voltage of the battery is greater than the input target voltage of the battery.

[0193] According to one embodiment, the processor may be configured to check a compensated second resistance in a constant current (CC) charging state of the battery. According to one embodiment, the processor may be configured to determine a first change value to satisfy the CC condition using the compensated second resistance in response to checking that the first current of the SCVD is lower than the input target current of the SCVD.

[0194] According to one embodiment, the processor may be configured to detect the load fluctuation caused by the system of the electronic device based on confirming that the second resistance is lower than a reference value or confirming a load current corresponding to the load of the system of the electronic device.

[0195] According to one embodiment, the processor may be configured to check for load fluctuations caused by the system of the electronic device. According to one embodiment, the processor may be configured to newly check the first voltage, the first current, the second voltage, and the second current based on checking for load fluctuations. According to one embodiment, the processor may be configured to newly check the first resistance, the second resistance, and the third resistance using at least one of the newly checked first voltage, the first current, the second voltage, and the second current. According to one embodiment, the processor may be configured to determine the first change value using the newly checked first resistance, the second resistance, and the third resistance.

[0196] According to one embodiment, the processor may be configured to determine whether the calculated second resistance has been affected by both the load variation and the voltage change when a load variation caused by the system of the electronic device is detected. According to one embodiment, the processor may be configured to compensate for the second resistance reduced by the load variation and the voltage change based on the determination that the calculated second resistance has been affected by both the load variation and the voltage change.

[0197] According to one embodiment, the processor may be configured to measure the first voltage and the first current after a specified time (blanking period) after requesting the external power supply to change the voltage of the power by a first change value. According to one embodiment, the processor may be configured to calculate the amount of change in equivalent resistance corresponding to the output terminal of the SCVD based on the measured first voltage and the first current.

[0198] According to one embodiment, the processor may be configured to adjust the specified time to be shorter than the reference time when the battery is in a constant current (CC) charging state. According to one embodiment, the processor may be configured to adjust the specified time to be longer than the reference time when the battery is in a constant voltage (CV) charging state.

[0199] According to one embodiment, the first resistor may represent an equivalent resistance for the external power supply, a cable connecting the connector and the external power supply, an overvoltage protection circuit, and a flexible printed circuit board (FPCB) connecting the connector and the overvoltage protection circuit. According to one embodiment, the second resistor may represent an equivalent resistance for the SCVD and the protection circuit module (PCM) of the battery. According to one embodiment, the third resistor may represent an equivalent resistance for the internal circuit of the battery. According to one embodiment, the external power supply may support an adjustable voltage supply (AVS).

[0200] According to one embodiment, a method of operation of an electronic device (201) including a switched capacitor voltage divider (SCVD) (250) may include an operation of charging a battery (270) included in the electronic device using the SCVD based on receiving power from an external power supply (202) via wired or wireless connection. According to one embodiment, a method of operation of the electronic device may include an operation of checking a first voltage (VIN) and a first current (IIN) input to the SCVD and a second voltage (VBAT) and a second current (IBAT) input to the battery while charging the battery using the SCVD. According to one embodiment, the method of operation of the electronic device may include an operation of calculating a first resistance (RT), which is an equivalent resistance from the external power supply to the input terminal of the SCVD, a second resistance (RCH), which is an equivalent resistance from the output terminal of the SCVD to the input terminal of the battery, and a third resistance (RDCR), which is an internal resistance of the battery, based on verifying the first voltage, the first current, the second voltage, or the second current. According to one embodiment, the method of operation of the electronic device may include an operation of requesting the external power supply to change the voltage of the power by a first change value via the communication circuit included in the electronic device in response to verifying a voltage change condition for requesting the external power supply to change the voltage of the power, wherein the first change value may be verified using at least one of the first resistance, the second resistance, and the third resistance.

[0201] According to one embodiment, the operation of checking the first change value includes the operation of determining the first change value such that the input expected voltage of the battery corresponds to the input target voltage of the battery, and the input target voltage may correspond to the input target voltage when charging the battery is started using the SCVD.

[0202] According to one embodiment, the operation of checking the first change value may include an operation of reducing the input target current of the SCVD based on confirming that the input expected voltage of the battery is greater than the input target voltage of the battery. According to one embodiment, the operation of checking the first change value may include an operation of determining the first change value such that the input target current is input to the SCVD and the input target voltage is input to the battery.

[0203] According to one embodiment, the method of operation of the electronic device may further include the operation of determining the first change value to satisfy the CV condition in response to confirming that the second voltage of the battery is greater than the input target voltage of the battery in a constant voltage (CV) charging state of the battery. According to one embodiment, the method of operation of the electronic device may further include the operation of requesting the external power supply to reduce the voltage of the power by the first change value.

[0204] According to one embodiment, the method of operation of the electronic device may further include the operation of determining the first change value to satisfy the CC (constant current) condition in response to confirming that the first current of the SCVD is lower than the input target current of the SCVD in the CC (constant current) charging state of the battery. According to one embodiment, the method of operation of the electronic device may further include the operation of requesting the external power supply to increase the voltage of the power by the first change value.

[0205] According to one embodiment, the method of operating the electronic device may further include an operation of checking whether the calculated second resistance has been affected by the load fluctuation when a load fluctuation caused by the system of the electronic device is detected. According to one embodiment, the method of operating the electronic device may further include an operation of compensating for the second resistance reduced by the load fluctuation based on the detection that the calculated second resistance has been affected by the load fluctuation.

[0206] The embodiment(s) and the terms used in this document are not intended to limit the technical features described in this document to specific embodiments, and should be understood to include various modifications, equivalents, or substitutions of said embodiments. In connection with the description of the drawings, similar reference numerals may be used for similar or related components. The singular form of a noun corresponding to an item may include one or more of said items unless the relevant context clearly indicates otherwise. In this document, phrases such as "A or B," "at least one of A and B," "at least one of A or B," "A, B or C," "at least one of A, B and C," and "at least one of A, B, or C" may each include any one of the items listed together in the corresponding phrase, or any combination thereof. Terms such as "first," "second," or "first" or "second" may be used simply to distinguish said components from other said components and do not limit said components in any other aspect (e.g., importance or order). Where any (e.g., 1st) component is referred to as "coupled" or "connected" to another (e.g., 2nd) component, with or without the terms "functionally" or "communicationly," it means that said any component may be connected to said other component directly (e.g., via a wire), wirelessly, or through a third component.

[0207] The term “module” as used in the various embodiments of this document may include a unit implemented in hardware, software, or firmware, and may be used interchangeably with terms such as logic, logic block, component, or circuit, for example. A module may be a component formed integrally, or a minimum unit of said component or a part thereof that performs one or more functions. For example, according to one embodiment, a module may be implemented in the form of an application-specific integrated circuit (ASIC).

[0208] Various embodiments of this document may be implemented as software (e.g., a program) comprising one or more instructions stored in a storage medium (e.g., internal memory or external memory) readable by a machine (e.g., an electronic device). For example, a processor (e.g., a processor) of the machine (e.g., an electronic device) may call at least one of the one or more instructions stored from the storage medium and execute it. This enables the machine to operate to perform at least one function according to the at least one called instruction. The one or more instructions may include code generated by a compiler or code that can be executed by an interpreter. The storage medium readable by the machine may be provided in the form of a non-transitory storage medium. Here, "non-transitory" simply means that the storage medium is a tangible device and does not contain a signal (e.g., electromagnetic waves), and this term does not distinguish between cases where data is stored semi-permanently and cases where it is stored temporarily in the storage medium.

[0209] According to one embodiment, the method according to various embodiments of the present disclosure may be provided by being included in a computer program product. The computer program product may be traded between a seller and a buyer as a product. The computer program product may be distributed in the form of a device-readable storage medium (e.g., compact disc read-only memory (CD-ROM)), or distributed online (e.g., download or upload) through an application store (e.g., Play Store™) or directly between two user devices (e.g., smartphones). In the case of online distribution, at least a portion of the computer program product may be temporarily stored or temporarily created in a device-readable storage medium, such as the memory of a manufacturer's server, an application store's server, or a relay server.

[0210] According to the embodiments, each component (e.g., module or program) of the components described above may include a singular or multiple entities, and some of the multiple entities may be separated and placed in other components. According to the embodiments, one or more of the components or operations of the aforementioned components may be omitted, or one or more other components or operations may be added. Generally or additionally, multiple components (e.g., module or program) may be integrated into a single component. In this case, the integrated component may perform one or more functions of each of the multiple components in the same or similar manner as those performed by the corresponding component among the multiple components prior to the integration. According to the embodiments, operations performed by the module, program, or other components may be executed sequentially, in parallel, iteratively, or heuristically, or one or more of the operations may be executed in a different order, omitted, or one or more other operations may be added.

Claims

1. In an electronic device (201), Communication circuit; Battery (270); A switched capacitor voltage divider (SCVD) (250) configured to convert an input voltage into an output voltage supplied to the battery according to a specified ratio; and It includes a processor (220), and the processor, Based on receiving power via wired or wireless connection from an external power supply (202 or 203), the battery is charged using the SCVD, and While charging the battery using the SCVD, check the first voltage (VIN) and first current (IIN) input to the SCVD and the second voltage (VBAT) and second current (IBAT) input to the battery, and Based on the first voltage, the first current, the second voltage, or the second current, calculate the first resistance (RT), which is the equivalent resistance from the external power supply to the input terminal of the SCVD, the second resistance (RCH), which is the equivalent resistance from the output terminal of the SCVD to the input terminal of the battery, and the third resistance (RDCR), which is the internal resistance of the battery. In response to checking a voltage change condition for requesting the external power supply to change the voltage of the power, the external power supply is configured to request the external power supply to change the voltage of the power by a first change value through the communication circuit to change the voltage, and The above first change value is an electronic device that is verified using at least one of the above first resistor, the above second resistor, and the above third resistor.

2. In paragraph 1, the processor, The first change value is determined such that the expected input voltage of the battery corresponds to the target input voltage of the battery, and The above input target voltage is an electronic device corresponding to the input target voltage when starting the charging of the battery using the above SCVD.

3. In any one of paragraphs 1 to 2, the processor, Based on confirming that the expected input voltage of the battery is greater than the target input voltage of the battery, the target input current of the SCVD is reduced, and An electronic device configured to determine the first change value such that the above input target current is input to the SCVD and the above input target voltage is input to the battery.

4. In any one of paragraphs 1 to 3, the processor, In the CV (constant voltage) charging state of the battery, the first change value for satisfying the CV condition is determined in response to confirming that the second voltage of the battery is greater than the input target voltage of the battery. An electronic device configured to request the above external power supply to reduce the voltage of the power by the above first change value.

5. In any one of paragraphs 1 to 4, the processor, In response to confirming that the first current of the SCVD is lower than the input target current of the SCVD in the constant current (CC) charging state of the battery, the first change value for satisfying the CC condition is determined, and An electronic device configured to request the above external power supply to increase the voltage of the power by the above first change value.

6. In any one of paragraphs 1 to 5, the processor, When a load fluctuation caused by the system of the electronic device is confirmed, it is checked whether the calculated second resistance was affected by the load fluctuation, and An electronic device configured to compensate for the second resistance reduced by the load variation, based on confirming that the second resistance calculated above is affected by the load variation.

7. In paragraph 6, the above processor, In the CV (constant voltage) charging state of the above battery, check the compensated second resistance, and An electronic device configured to determine the first change value to satisfy the CV condition using the compensated second resistance in response to confirming that the second voltage of the battery is greater than the input target voltage of the battery.

8. In any one of paragraphs 6 through 7, In the CC (constant current) charging state of the above battery, check the compensated second resistance, and An electronic device configured to determine the first change value to satisfy the CC condition using the compensated second resistor in response to confirming that the first current of the SCVD is lower than the input target current of the SCVD.

9. In any one of paragraphs 1 through 8, the processor, An electronic device configured to check the load fluctuation caused by the system of the electronic device based on confirming that the second resistance is lower than a reference value or confirming the load current corresponding to the load of the system of the electronic device.

10. In any one of paragraphs 1 to 9, the processor, Check for load fluctuations caused by the system of the above electronic device. Based on verifying the above load fluctuation, the first voltage, the first current, the second voltage, and the second current are newly verified, and Using at least one of the newly identified first voltage, first current, second voltage, and second current, the first resistance, the second resistance, and the third resistance are newly identified, and An electronic device configured to determine the first change value using the newly identified first resistor, the second resistor, and the third resistor.

11. In any one of claims 1 to 10, the processor, When a load fluctuation caused by the system of the electronic device is confirmed, it is checked whether the calculated second resistance was affected by both the load fluctuation and the voltage change, and An electronic device configured to compensate for the second resistance reduced by the load variation and the voltage change, based on confirming that the second resistance calculated above is affected by both the load variation and the voltage change.

12. In any one of paragraphs 1 to 11, the processor, After requesting the external power supply to change the voltage of the power by a first change value, the first voltage and the first current are remeasured after a specified time (blanking period), and An electronic device configured to calculate the amount of change in equivalent resistance corresponding to the output terminal of the SCVD based on the first voltage and the first current re-measured above.

13. In Clause 12, the above processor, When the above battery is in a constant current (CC) charging state, the above-mentioned specified time is adjusted to be shorter than the reference time, and An electronic device configured to adjust the specified time to be longer than the reference time when the above battery is in a CV (constant voltage) charging state.

14. In any one of paragraphs 1 through 13, The first resistor above represents the equivalent resistance for the power supply circuit of the external power supply, the cable connecting the connector and the external power supply, the overvoltage protection circuit, and the FPCB (flexible printed circuit board) connecting the connector and the overvoltage protection circuit. The second resistor above represents the equivalent resistance for the SCVD and the protection circuit module (PCM) of the battery, and The third resistor above represents the equivalent resistance for the internal circuit of the battery, and An electronic device characterized by the above external power supply supporting AVS (adjustable voltage supply).

15. A method of operating an electronic device (201) including a switched capacitor voltage divider (SCVD) (250), The operation of charging a battery (270) included in the electronic device using the SCVD based on receiving power via wired or wireless connection from an external power supply (202 or 203); An operation to check the first voltage (VIN) and first current (IIN) input to the SCVD and the second voltage (VBAT) and second current (IBAT) input to the battery while charging the battery using the SCVD; An operation to calculate a first resistance (RT), which is an equivalent resistance from the external power supply to the input terminal of the SCVD, a second resistance (RCH), which is an equivalent resistance from the output terminal of the SCVD to the input terminal of the battery, and a third resistance (RDCR), which is an internal resistance of the battery, based on verifying the first voltage, the first current, the second voltage, or the second current; In response to checking a voltage change condition for requesting the external power supply to change the voltage of the power, the operation includes requesting the external power supply to change the voltage of the power by a first change value through the communication circuit to change the voltage. A method of operation of an electronic device in which the first change value is verified using at least one of the first resistor, the second resistor, and the third resistor.

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