WO2022186544A1

WO2022186544A1 - Electronic device and method for controlling charging of electronic device

Info

Publication number: WO2022186544A1
Application number: PCT/KR2022/002710
Authority: WO
Inventors: 오창학; 김난새; 최항석
Original assignee: 삼성전자 주식회사
Priority date: 2021-03-04
Filing date: 2022-02-24
Publication date: 2022-09-09
Also published as: KR20220124932A

Abstract

An electronic device, according to various embodiments, may comprise: a battery cell that supplies power; at least one battery protection circuit that is coupled to the battery cell; a battery pack that includes the battery cell and the at least one battery protection circuit; and a processor that is operatively coupled to the battery pack. The processor, when the battery pack is charged by an external power source, may be configured to monitor until a voltage of the battery pack becomes equal to or greater than a preset first voltage, measure the number of occurrences of voltage fluctuations equal to or greater than a specified set value of the voltage of the battery pack during the monitoring process, determine a voltage range of the battery cell on the basis of the measured voltage of the battery pack and the number of occurrences of voltage fluctuations, and predict a voltage of the battery cell on the basis of the voltage range of the battery cell.

Description

Electronic devices and methods for controlling charging of electronic devices

Various embodiments of the present document relate to an electronic device, for example, to an electronic device using a battery including a battery cell and a battery protection circuit, and to a charging method of the electronic device.

In general, a battery pack used as a power source of an electronic device may include a structure in which a battery cell and a battery protection circuit module are coupled. The battery cell may include a form in which an electrode stacking unit including a positive electrode sheet and a negative electrode sheet is accommodated in a metal case or pouch. The battery protection circuit is to prevent explosion and overcharging of the battery and may be connected to terminals of the battery cell.

The battery protection circuit can be composed of a discharging FET and a charging FET. The battery protection circuit opens the charging FET above a specific voltage and opens the discharging FET below a specific voltage to protect the battery.

The battery pack voltage Vpack may be determined as the sum of the battery cell voltage Vcell and the battery protection circuit voltages Vpcm1 and Vpcm2. If a voltage higher than the corresponding voltage is applied to both ends of the battery in the low voltage state where both discharging FETs are open, the Vcell voltage rises. can be confirmed in As the voltage rises, the discharging FET of the PCM may close, and when both discharging FETs are closed, Vpack (battery pack voltage) may become the same voltage as Vcell (battery cell voltage).

Unlike the high voltage section where both discharging FETs are closed, the Vpack (battery pack voltage) referenced by the charger may not be the same as the actual Vcell (battery cell voltage) when charging in the low voltage section where all FETs of the battery protection circuit are open. can As a result, it may be difficult to accurately determine the actual battery cell voltage, making it impossible to implement an accurate charging operation. That is, a phenomenon in which charging cannot be interrupted may occur in a low voltage range of a battery requiring charging interruption. Also, since the actual battery cell voltage and the measured pack voltage are different, the design of the charging operation may be limited.

According to various embodiments of the present document, it is possible to know the correct battery cell voltage through an algorithm for determining the actual battery cell voltage. Design limitations can be overcome if the charging operation is designed based on the correct battery cell voltage.

An electronic device according to various embodiments includes a battery cell for supplying power, at least one battery protection circuit connected to the battery cell, a battery pack including a battery cell and at least one or more battery protection circuits, a battery pack and It may include an operatively coupled processor. When the battery pack is charged by an external power source, the processor monitors until the voltage of the battery pack reaches a preset first voltage or higher, and measures the number of occurrences of voltage fluctuations greater than or equal to a specified set value of the voltage of the battery pack during the monitoring process; , may be set to determine the voltage section of the battery cell based on the measured voltage of the battery pack and the number of voltage fluctuations, and to predict the voltage of the battery cell based on the voltage section of the battery cell.

A method of charging an electronic device according to various embodiments of the present disclosure includes monitoring a voltage of a battery pack, determining a voltage section of a battery cell, and predicting a voltage of a battery cell according to a voltage section of the battery cell, The operation of determining the voltage range of the cell includes the operation of monitoring the voltage of the battery pack and measuring the number of occurrences of voltage fluctuations greater than or equal to a specified set value, and the operation of classifying the voltage period of the battery cell according to the number of occurrences of voltage fluctuations greater than or equal to the specified setting value. may include

According to various embodiments, an actual battery cell voltage section may be determined using the battery pack voltage in a battery pack structure in which it is difficult to directly measure the battery cell voltage. Through this, the charging operation or the charging cut-off operation in the low voltage section in which safety is not guaranteed can be performed more accurately.

According to various embodiments, it is possible to implement a protection operation, such as a fast charging cutoff, for a battery whose battery cell characteristics have deteriorated to less than or equal to a charging guarantee range due to battery aging or long-term discharge.

1 is a block diagram of an electronic device in a network environment, according to various embodiments of the present disclosure;

2 is a block diagram of a power management module and a battery, in accordance with various embodiments.

3 is a block diagram illustrating a configuration of an electronic device according to various embodiments of the present disclosure;

4 is a circuit diagram illustrating a battery structure of an electronic device according to various embodiments of the present disclosure;

5 is a block diagram illustrating a voltage prediction process of a battery cell 312 of an electronic device according to various embodiments of the present disclosure.

6A to 6C are graphs illustrating a change in a battery pack voltage according to a battery cell voltage during a charging process of an electronic device according to various embodiments of the present disclosure;

7A to 7C are tables summarizing the values of the battery pack 310 voltage and the battery cell 312 voltage according to voltage sections according to various embodiments of the present disclosure.

8 is a flowchart illustrating a process of obtaining an accurate battery cell 312 voltage in a charging method of the electronic device 300 according to various embodiments of the present disclosure.

9 is a flowchart illustrating a charging method of an electronic device according to various embodiments of the present disclosure;

1 is a block diagram of an electronic device 101 in a network environment 100, according to various embodiments. Referring to FIG. 1 , in a network environment 100 , an electronic device 101 communicates with an electronic device 102 through a first network 198 (eg, a short-range wireless communication network) or a second network 199 . It may communicate with at least one of the electronic device 104 and the server 108 through (eg, a long-distance wireless communication network). According to an embodiment, the electronic device 101 may communicate with the electronic device 104 through the server 108 . According to an embodiment, the electronic device 101 includes a processor 120 , a memory 130 , an input module 150 , a sound output module 155 , a display module 160 , an audio module 170 , and a 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 an antenna module 197 . In some embodiments, at least one of these components (eg, the connection terminal 178 ) may be omitted or one or more other components may be added to the electronic device 101 . In some embodiments, some of these components (eg, sensor module 176 , camera module 180 , or antenna module 197 ) are integrated into one component (eg, display module 160 ). can be

The processor 120, for example, executes software (eg, a program 140) to execute at least one other component (eg, a hardware or software component) of the electronic device 101 connected to the processor 120. It can control and perform various data processing or operations. According to one embodiment, as at least part of data processing or operation, the processor 120 converts commands or data received from other components (eg, the sensor module 176 or the communication module 190 ) to the volatile memory 132 . may be stored in , process commands or data stored in the volatile memory 132 , and store the result data in the non-volatile memory 134 . According to an embodiment, the processor 120 is the main processor 121 (eg, a central processing unit or an application processor) or a secondary processor 123 (eg, a graphic processing unit, a neural network processing unit (eg, a graphic processing unit, a neural network processing unit) a neural processing unit (NPU), an image signal processor, a sensor hub processor, or a communication processor). For example, when the electronic device 101 includes the main processor 121 and the sub-processor 123 , the sub-processor 123 uses less power than the main processor 121 or is set to be specialized for a specified function. can The auxiliary processor 123 may be implemented separately from or as a part of the main processor 121 .

The secondary processor 123 may, for example, act on behalf of the main processor 121 while the main processor 121 is in an inactive (eg, sleep) state, or when the main processor 121 is active (eg, executing an application). ), together with the main processor 121, at least one of the components of the electronic device 101 (eg, the display module 160, the sensor module 176, or the communication module 190) It is possible to control at least some of the related functions or states. According to an embodiment, the coprocessor 123 (eg, an image signal processor or a communication processor) may be implemented as part of another functionally related component (eg, the camera module 180 or the communication module 190 ). have. According to an embodiment, the auxiliary processor 123 (eg, a neural network processing device) may include a hardware structure specialized for processing an artificial intelligence model. Artificial intelligence models can be created through machine learning. Such learning may be performed, for example, in the electronic device 101 itself on which the artificial intelligence model is performed, or may be performed through a separate server (eg, the server 108). The learning algorithm may include, for example, supervised learning, unsupervised learning, semi-supervised learning, or reinforcement learning, but in the above example not limited The artificial intelligence model may include a plurality of artificial neural network layers. Artificial neural networks include deep neural networks (DNNs), convolutional neural networks (CNNs), recurrent neural networks (RNNs), restricted boltzmann machines (RBMs), deep belief networks (DBNs), bidirectional recurrent deep neural networks (BRDNNs), It may be one of deep Q-networks or a combination of two or more of the above, but is not limited to the above example. The artificial intelligence model may include, in addition to, or alternatively, a software structure in addition to the hardware structure.

The memory 130 may store various data used by at least one component (eg, the processor 120 or the sensor module 176 ) of the electronic device 101 . The data may include, for example, input data or output data for software (eg, the program 140 ) and instructions related thereto. The memory 130 may include a volatile memory 132 or a non-volatile memory 134 .

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

The input module 150 may receive a command or data to be used by a component (eg, the processor 120 ) of the electronic device 101 from the outside (eg, a user) of the electronic device 101 . The input module 150 may include, for example, a microphone, a mouse, a keyboard, a key (eg, a button), or a digital pen (eg, a stylus pen).

The sound output module 155 may 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 can be used for general purposes such as multimedia playback or recording playback. The receiver can be used to receive incoming calls. According to one embodiment, the receiver may be implemented separately from or as part of the speaker.

The display module 160 may visually provide information to the outside (eg, a user) of the electronic device 101 . The display module 160 may include, for example, a control circuit for controlling a display, a hologram device, or a projector and a corresponding device. According to an embodiment, the display module 160 may include a touch sensor configured to sense a touch or a pressure sensor configured to measure the intensity of a force generated by the touch.

The audio module 170 may convert a sound into an electric signal or, conversely, convert an electric signal into a sound. According to an embodiment, the audio module 170 acquires a sound through the input module 150 , or an external electronic device (eg, a sound output module 155 ) connected directly or wirelessly with the electronic device 101 . The electronic device 102) (eg, a speaker or headphones) may output a sound.

The sensor module 176 detects an operating state (eg, power or temperature) of the electronic device 101 or an external environmental state (eg, a user state), and generates an electrical signal or data value corresponding to the sensed state. can do. According to an embodiment, the sensor module 176 may include, for example, a gesture sensor, a gyro sensor, a barometric pressure sensor, a magnetic sensor, an acceleration sensor, a grip sensor, a proximity sensor, a color sensor, an IR (infrared) sensor, a biometric sensor, It may include a temperature sensor, a humidity sensor, or an illuminance sensor.

The interface 177 may support one or more specified protocols that may be used by the electronic device 101 to directly or wirelessly connect with an external electronic device (eg, the electronic device 102 ). According to an 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.

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

The haptic module 179 may convert an electrical signal into a mechanical stimulus (eg, vibration or movement) or an electrical stimulus that the user can perceive through tactile or kinesthetic sense. According to an embodiment, the haptic module 179 may include, for example, a motor, a piezoelectric element, or an electrical stimulation device.

The camera module 180 may capture still images and moving images. According to an embodiment, the camera module 180 may include one or more lenses, image sensors, image signal processors, or flashes.

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

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

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

The wireless communication module 192 may support a 5G network after a 4G network and a next-generation communication technology, for example, a new radio access technology (NR). NR access technology includes high-speed transmission of high-capacity data (eMBB (enhanced mobile broadband)), minimization of terminal power and access to multiple terminals (mMTC (massive machine type communications)), or high reliability and low latency (URLLC (ultra-reliable and low-latency) -latency communications)). The wireless communication module 192 may support a high frequency band (eg, mmWave band) to achieve a high data rate, for example. The wireless communication module 192 uses various techniques for securing performance in a high-frequency band, for example, beamforming, massive multiple-input and multiple-output (MIMO), all-dimensional multiplexing. It may support technologies such as full dimensional MIMO (FD-MIMO), an array antenna, analog beam-forming, or a large scale antenna. The wireless communication module 192 may support various requirements defined in the electronic device 101 , an external electronic device (eg, the electronic device 104 ), or a network system (eg, the second network 199 ). According to an embodiment, the wireless communication module 192 may include a peak data rate (eg, 20 Gbps or more) for realizing eMBB, loss coverage (eg, 164 dB or less) for realizing mMTC, or U-plane latency for realizing URLLC ( Example: Downlink (DL) and uplink (UL) each 0.5 ms or less, or round trip 1 ms or less) can be supported.

The antenna module 197 may transmit or receive a signal or power to the outside (eg, an external electronic device). According to an embodiment, the antenna module 197 may include an antenna including a conductor formed on a substrate (eg, a PCB) or a radiator formed of a conductive pattern. According to an embodiment, the antenna module 197 may include a plurality of antennas (eg, an array antenna). In this case, at least one antenna suitable for a communication method used in a communication network such as the first network 198 or the second network 199 is connected from the plurality of antennas by, for example, the communication module 190 . can be selected. 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, other components (eg, a radio frequency integrated circuit (RFIC)) other than the radiator may be additionally formed as a part of the antenna module 197 .

According to various embodiments, the antenna module 197 may form a mmWave antenna module. According to one embodiment, the mmWave antenna module comprises a printed circuit board, an RFIC disposed on or adjacent to a first side (eg, bottom side) of the printed circuit board and capable of supporting a designated high frequency band (eg, mmWave band); and a plurality of antennas (eg, an array antenna) disposed on or adjacent to a second side (eg, top or side) of the printed circuit board and capable of transmitting or receiving signals of the designated high frequency band. can do.

At least some of the components are connected to each other through a communication method between peripheral devices (eg, a bus, general purpose input and output (GPIO), serial peripheral interface (SPI), or mobile industry processor interface (MIPI)) and a signal ( e.g. commands or data) can be exchanged with each other.

According to an embodiment, the command or data may be transmitted or received between the electronic device 101 and the external electronic device 104 through the server 108 connected to the second network 199 . Each of the external

electronic devices

102 or 104 may be the same as or different from the electronic device 101 . According to an embodiment, all or a part of operations executed in the electronic device 101 may be executed in one or more external

electronic devices

102 , 104 , or 108 . For example, when the electronic device 101 needs to perform a function or service automatically or in response to a request from a user or other device, the electronic device 101 may perform the function or service itself instead of executing the function or service itself. Alternatively or additionally, one or more external electronic devices may be requested to perform at least a part of the function or the service. One or more external electronic devices that have received the request may execute at least a part of the requested function or service, or an additional function or service related to the request, and transmit a result of the execution to the electronic device 101 . The electronic device 101 may process the result as it is or additionally and provide it as at least a part of a 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 an ultra-low latency service 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 an embodiment, the external electronic device 104 or the server 108 may be included in the second network 199 . The electronic device 101 may be applied to an intelligent service (eg, smart home, smart city, smart car, or health care) based on 5G communication technology and IoT-related technology.

The electronic device according to various embodiments disclosed in this document may have various types of devices. The electronic device may include, for example, a portable communication device (eg, a smart phone), a computer device, a portable multimedia device, a portable medical device, a camera, a wearable device, or a home appliance device. The electronic device according to the embodiment of the present document is not limited to the above-described devices.

The various embodiments of this document and terms used therein are not intended to limit the technical features described in this document to specific embodiments, but it should be understood to include various modifications, equivalents, or substitutions of the embodiments. In connection with the description of the drawings, like reference numerals may be used for similar or related components. The singular form of the noun corresponding to the item may include one or more of the item, unless the relevant context clearly dictates otherwise. As used herein, "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 "A , B, or C," each of which may include any one of the items listed together in the corresponding one of the phrases, or all possible combinations thereof. Terms such as "first", "second", or "first" or "second" may simply be used to distinguish an element from other elements in question, and may refer elements to other aspects (e.g., importance or order) is not limited. It is said that one (eg, first) component is “coupled” or “connected” to another (eg, second) component, with or without the terms “functionally” or “communicatively”. When referenced, it means that one component can be connected to the other component directly (eg by wire), wirelessly, or through a third component.

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

Various embodiments of the present document include one or more instructions stored in a storage medium (eg, internal memory 136 or external memory 138) readable by a machine (eg, electronic device 101). may be implemented as software (eg, the program 140) including For example, the processor (eg, the processor 120 ) of the device (eg, the electronic device 101 ) may call at least one of the one or more instructions stored from the storage medium and execute it. This makes it possible for the device to be operated to perform at least one function according to the called at least one command. The one or more instructions may include code generated by a compiler or code executable by an interpreter. The device-readable storage medium may be provided in the form of a non-transitory storage medium. Here, 'non-transitory' only means that the storage medium is a tangible device and does not contain a signal (eg, electromagnetic wave), and this term is used in cases where data is semi-permanently stored in the storage medium and It does not distinguish between temporary storage cases.

According to one embodiment, the method according to various embodiments disclosed in this document may be provided in a computer program product (computer program product). Computer program products may be traded between sellers and buyers as commodities. The computer program product is distributed in the form of a machine-readable storage medium (eg compact disc read only memory (CD-ROM)), or through an application store (eg Play Store™) or on two user devices ( It can be distributed (eg downloaded or uploaded) directly, online between smartphones (eg: 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 machine-readable storage medium such as a memory of a server of a manufacturer, a server of an application store, or a relay server.

According to various embodiments, each component (eg, a module or a program) of the above-described components may include a singular or a plurality of entities, and some of the plurality of entities may be separately disposed in other components. have. According to various embodiments, one or more components or operations among the above-described corresponding components may be omitted, or one or more other components or operations may be added. Alternatively or additionally, a plurality of components (eg, a module or a program) may be integrated into one component. In this case, the integrated component may perform one or more functions of each component of the plurality of components identically or similarly to those performed by the corresponding component among the plurality of components prior to the integration. . According to various embodiments, operations performed by a module, program, or other component are executed sequentially, in parallel, repeatedly, or heuristically, or one or more of the operations are executed in a different order, or omitted. , or one or more other operations may be added.

2 is a block diagram 200 of a power management module 188 and a battery 189, in accordance with various embodiments. Referring to FIG. 2 , the power management module 188 may include a charging circuit 210 , a power regulator 220 , or a power gauge 230 . The charging circuit 210 may charge the battery 189 using power supplied from an external power source for the electronic device 101 . According to an embodiment, the charging circuit 210 may include a type of external power source (eg, a power adapter, USB, or wireless charging), a size of power that can be supplied from the external power source (eg, about 20 watts or more), or a battery 189 ), a charging method (eg, normal charging or fast charging) may be selected based on at least some of the properties, and the battery 189 may be charged using the selected charging method. The external power source may be connected to the electronic device 101 by wire through, for example, the connection terminal 178 or wirelessly through the antenna module 197 .

The power regulator 220 may generate a plurality of powers having different voltages or different current levels by, for example, adjusting a voltage level or current level of power supplied from an external power source or battery 189 . The power regulator 220 may adjust the external power source or the power of the battery 189 to a voltage or current level suitable for each of some of the components included in the electronic device 101 . According to an embodiment, the power regulator 220 may be implemented in the form of a low drop out (LDO) regulator or a switching regulator. The power gauge 230 may measure usage state information about the battery 189 (eg, the capacity of the battery 189 , the number of times of charging and discharging, a voltage, or a temperature).

The power management module 188, for example, using the charging circuit 210 , the voltage regulator 220 , or the power gauge 230 , is configured to control the battery 189 based at least in part on the measured usage state information. Charge-related state of charge information (eg, lifetime, overvoltage, undervoltage, overcurrent, overcharge, overdischarge, overheat, short circuit, or swelling) may be determined. The power management module 188 may determine whether the battery 189 is normal or abnormal based at least in part on the determined state of charge information. When it is determined that the state of the battery 189 is abnormal, the power management module 188 may adjust charging of the battery 189 (eg, decrease charging current or voltage, or stop charging). According to an embodiment, at least some of the functions of the power management module 188 may be performed by an external control device (eg, the processor 120 ).

The battery 189 may include a battery protection circuit module (PCM) 240 , according to one embodiment. The battery protection circuit 240 may perform one or more of various functions (eg, a pre-blocking function) to prevent deterioration or burnout of the battery 189 . The battery protection circuit 240 is additionally or alternatively a battery management system (battery management system) capable of performing various functions including cell balancing, capacity measurement of a battery, number of times of charge/discharge measurement, temperature measurement, or voltage measurement. BMS))).

According to an embodiment, at least a portion of the use state information or the charge state information of the battery 189 is a corresponding sensor (eg, a temperature sensor), a power gauge 230 , or a power management module among the sensor modules 276 . (188) can be used. According to an embodiment, the corresponding sensor (eg, a temperature sensor) of the sensor module 176 is included as a part of the battery protection circuit 140 , or is a separate device to be disposed in the vicinity of the battery 189 . can

According to various embodiments, the electronic device 300 (eg, the electronic device 101 ) includes the battery pack 310 (eg, the battery 189 ), the processor 320 (eg, the processor 120 ), and the memory 330 . ) (eg, the memory 140 ). The battery pack 310 may further include a battery cell 312 and a battery protection circuit 314 , and some of the illustrated components may be omitted or replaced. The electronic device 300 may further include at least some of the configuration and/or functions of the electronic device 101 of FIG. 1 . Some of the respective components of the illustrated (or not illustrated) electronic device 300 may be operatively, functionally, and/or electrically connected.

According to various embodiments, the battery protection circuit 314 (protection circuit module) has an over voltage protection (OVP) function, an under voltage protection (UVP) function, and an under voltage protection (UVP) function. , or short-circuit protection. The structure and operation of the battery protection circuit 314 will be described in detail with reference to FIG. 4 .

According to various embodiments, the voltage of the battery pack 310 may be determined as the sum of the voltage of the battery cell 312 and the internal voltage of the battery protection circuit 314 . The battery pack 310 may include a battery cell 312 and at least one battery protection circuit 314 . The battery of the electronic device 300 (eg, the battery 189 of FIG. 2 ) may be configured to include a battery pack. In addition, charging of the battery 189 may be performed in the form of charging the battery pack 310 . The voltage of the battery pack 310 may be different from the voltage of the battery cell 312 due to the voltage of the battery protection circuit 314 .

According to various embodiments, the charging operation of the battery pack 310 such as the charging/disconnecting operation of the low voltage range may be determined based on the voltage of the battery cell 312 . Although it may be necessary to measure the voltage of the battery cell 312 for the charging operation, it may be relatively difficult to directly measure the voltage of the battery cell 312 due to the internal circuit structure of the battery 189 . Due to this, the user may utilize the voltage of the battery pack 310 which is relatively easy to measure, but as mentioned above, the voltage of the battery pack 310 may be different from the voltage of the battery cell 312 . That is, since it is difficult to accurately measure the voltage of the battery cell 312 , it may also be difficult to accurately implement the charging operation of the battery 189 .

According to various embodiments, the electronic device 300 may protect the battery pack 310 by blocking charging of the battery pack 310 in a low voltage range. In order to determine whether the voltage of the battery pack 310 corresponds to a low voltage, it may be necessary to accurately measure the voltage of the battery cell 312 . However, it may be difficult to accurately measure the voltage of the battery cell 312 due to the structure of the battery 189 or the battery pack 310 . In addition, when the voltage of the battery pack 310 is different from the voltage of the battery cell 312 , the voltage range of the battery 189 may be erroneously determined and it may be difficult to accurately cut off the charge. If the charging cutoff operation is not accurately performed, the safety of the battery 189 may not be guaranteed. That is, in severe cases, the battery 189 may explode, or the lifespan of the battery 189 may be reduced or deteriorated. In order to prevent this and implement an accurate charge cut-off operation, the correct voltage of the battery cell 312 may be required.

According to various embodiments, the processor 320 is a configuration capable of performing an operation or data processing related to control and/or communication of each component of the electronic device 300 , and may be composed of one or more processors 320 . can The processor 320 may include at least some of the configuration and/or functions of the processor 120 of FIG. 1 .

According to various embodiments, there will be no limitation on the arithmetic and data processing functions that the processor 320 can implement on the electronic device 300 , but hereinafter, the characteristics related to voltage control of the battery pack 310 will be described in detail. do. Operations of the processor 320 may be performed by loading instructions stored in the memory 330 .

According to various embodiments, the processor 320 of the electronic device 300 may control the charging operation of the battery pack 310 . The charging operation of the battery pack 310 and its necessity have been described above. The processor 320 may need to accurately measure the voltage of the battery cell 312 in order to implement an accurate charging operation. However, the battery cell 312 may exist inside the battery pack 310 , and thus it may be difficult to directly measure the voltage of the battery cell 312 .

According to various embodiments, the processor 320 of the electronic device 300 may apply an algorithm for predicting the voltage of the battery pack 310 and the voltage interval of the battery cell 312 . Through this, it is possible to predict the operating state of the battery protection circuit 314 in a battery or electronic device having a structure in which it is difficult to measure the voltage of the battery cell 312 . Based on the prediction of the operating state of the battery protection circuit 314 , a charging operation with reference to the voltage section of the battery cell 312 may be implemented. The process of predicting the voltage of the battery cell 312 will be described in detail with reference to FIGS. 5 to 8 .

According to various embodiments, the electronic device 300 may include a memory 330 that records the measured voltage of the battery pack 310 and a voltage change greater than or equal to a specified set value. The electronic device 300 may include one or more memories 330 . The memory 330 may include a main memory and a storage. The main memory may be configured as a volatile memory such as dynamic random access memory (DRAM), static RAM (SRAM), or synchronous dynamic RAM (SDRAM). The storage may include at least one of one time programmable ROM (OTPROM), PROM, EPROM, EEPROM, mask ROM, flash ROM, flash memory, hard drive, or solid state drive (SSD).

According to various embodiments, the battery pack 310 of the electronic device 300 may include a battery cell 312 and at least one battery protection circuit 314 . As described above with reference to FIG. 3 , the battery protection circuit 314 may be a circuit for protecting the performance of the battery pack 310 from overvoltage and undervoltage when charging the battery pack 310 . The battery protection circuit 314 may include at least one field effect transistor (FET).

Referring to FIG. 4 , a first switch 401 and a second switch 402 may be installed inside the battery protection circuit 314 . The first switch 401 and the second switch 402 may have the form of a field effect transistor (FET), and may function as a switch in the battery protection circuit 314 . There may be at least one battery protection circuit 314 . For example, the battery pack 310 of FIG. 4 includes a battery protection circuit 314 (eg, a first battery protection circuit V _PCM1 ) and a second battery protection circuit. (V _PCM2 ) ). When the battery pack 310 is overcharged, the battery protection circuit 314 may detect a voltage abnormality state. In this case, the battery protection circuit 314 shorts the first switch 401 included in the first battery protection circuit V _PCM1 and/or the second switch 402 included in the second battery protection circuit V _PCM2 . to protect the battery pack 310 . When the first switch 401 included in the first battery protection circuit (V _PCM1 ) is shorted, the voltage of the entire battery pack 310 is increased by the FET diode drop voltage due to the current flowing through the first battery protection circuit (V _PCM1 ) can decrease. When the second switch 402 included in the second battery protection circuit (V _PCM2 ) is shorted, the voltage of the entire battery pack 310 increases as much as the FET diode drop voltage due to the current flowing through the second battery protection circuit (V _PCM2 ) can decrease. Also, the battery protection circuit 314 may detect a voltage abnormal state due to over-discharge of the battery during discharging. In this case, the battery protection circuit 314 opens the first switch 401 included in the first battery protection circuit V _PCM1 and the second switch 402 included in the second battery protection circuit V _PCM2 to open the battery. The pack 310 may be protected. In addition, the battery protection circuit 314 may turn off the first switch 401 and the second switch 402 to stop charging and discharging when an overcurrent flows into the circuit due to an abnormality inside the battery. That is, the battery protection circuit 314 may block the circuit when an overcurrent flows due to an internal short circuit of the battery or an external short circuit due to a malfunction of the operating device. It is possible to prevent fire and explosion by blocking the electric circuit, and the battery protection circuit 314 may cut off current by turning off the first switch 401 and the second switch 402 .

Looking at the structure of the battery pack 310 , a battery cell 312 and at least one battery protection circuit 314 may be included in the battery pack 310 . Since the battery cell 312 exists inside the battery pack 310 , it may be difficult to accurately measure the voltage with a general voltage measuring device in terms of structure. Therefore, it is possible to measure the voltage of the battery pack 310 and control the charging operation of the electronic device based on the measured voltage. However, the FET (eg, the first switch 401 and/or the second switch 402 ) inside the battery protection circuit 314 may collect a voltage equal to the diode drop. The voltage of the battery pack 310 may include the voltage of the battery cell 312 as well as a voltage equal to the diode drop of the internal FET. Due to this, the voltage of the battery cell 312 and the battery pack 310 may be different, and it may be difficult to accurately measure the voltage of the battery cell 312 . When controlling the charging operation based on the incorrect voltage of the battery cell 312 , it may be difficult to accurately control the charging operation. Due to this, there may be limitations in the design of the charging operation, such as not being able to cut off the charge in the low voltage (about 3.2V or less) range that requires the charge to be cut off. If accurate charging operation cannot be controlled, the risk of explosion of the battery pack 310 may increase due to overcharging, and deterioration of the battery pack 310 may proceed. A process of predicting the battery cell 312 voltage in order to design an accurate battery pack 310 charging operation will be described in detail with reference to FIGS. 5 to 8 .

According to various embodiments, the processor 320 may measure a voltage value of the battery pack 310 . For example, when the processor 320 receives power from an external power source and starts charging the battery pack 310 , the processor 320 may perform an operation of measuring a voltage value of the battery pack 310 . The processor 320 may store the corresponding measurement value in the memory 330 . The processor 320 may detect a voltage change greater than or equal to a specified set value in the process of measuring the voltage of the battery pack 310 , and may measure the number of times and store it in the memory 330 . The processor 320 may predict the voltage section of the battery cell 312 through an algorithm based on the voltage value of the battery pack 310 stored in the memory 330 and the number of voltage fluctuations greater than or equal to a specified set value.

According to various embodiments, the voltage section of the battery cell 312 may include a first section, a second section, and a third section. This section classification will be described in more detail with reference to FIG. 6B .

According to various embodiments, the processor 320 may predict the value of the battery cell 312 according to the voltage period of the battery cell 312 . For example, when the processor 320 determines that the voltage of the battery cell 312 is the first period, the processor 320 determines that the voltage of the battery cell 312 is the same as the voltage of the battery pack 310 . The voltage of the battery cell 312 may be calculated. When it is determined that the voltage of the battery cell 312 is the second period, the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by the first set value, and thus the battery cell 312 . ) can be calculated. When the voltage of the battery cell 312 is determined to be the third period, the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by the second set value, ) can be calculated. The first set value may include about 0.7V corresponding to a diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 . The second set value may correspond to about 1.4V, which is twice the diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 .

According to various embodiments, when the voltage interval and voltage value of the battery cell 312 are predicted, they may be used to control the charging operation of the battery. If an accurate value of the battery cell 312 can be predicted, accurate charging operation control may be possible. Explosion and aging of the battery can be prevented if the charging operation control is performed accurately. A process of determining the voltage range of the battery cell 312 will be described in detail with reference to FIGS. 6 and 7 .

According to various embodiments, the electronic device 300 may include at least one battery protection circuit 314 . For example, the electronic device 300 may include two battery protection circuits 314 . Each of the battery protection circuits 314 may include a FET therein, and may include a first switch 401 and a second switch 402 for blocking current inside the FET. Hereinafter, a process in which the electronic device 300 includes two battery protection circuits 314 and adjusts the voltage of the battery pack 310 through the first switch 401 and the second switch 402 will be described. will be. However, the number of battery protection circuits 314 that the electronic device 300 may include is not limited to two and may vary depending on design.

According to various embodiments, the x-axis on the graph may mean the voltage of the battery cell 312 and the y-axis may mean the voltage of the battery pack 310 . As described above with reference to FIG. 4 , it may be difficult to measure the voltage of the battery cell 312 due to the structure of the battery pack 310 . Line 610 shows the voltage 610 of the battery pack 310 during the charging process. The processor 320 may monitor the voltage of the battery pack 310 during the charging process. The processor 320 may monitor the voltage of the battery pack 310 until it reaches a specific voltage (eg, about 3.3V). When the voltage of the battery pack 310 exceeds 3.2V, the switch (eg, the first switch 401 or the second switch 402 of FIG. 4 ) of the battery protection circuit 314 may operate, and thus the battery cell The voltage of 312 can be estimated. Therefore, when the voltage of the battery pack 310 exceeds 3.2V and exceeds about 3.3V, all the switches of the battery protection circuit 314 operate, so that the battery cell 312 is no longer monitored without monitoring the voltage of the battery pack 310 . voltage can be estimated. The monitoring limit value of the voltage of the battery pack 310 may vary according to a setting, and is not limited to about 3.3V. Looking at the graph of FIG. 6A , it can be seen that there is a voltage drop over a specified set value (eg, 0.3V) over three times ( 621 , 623 , and 625 ).

Referring to 621, it can be seen that the voltage 610 of the battery pack 310 reaches 3.2V and drops to 2.5V once. This voltage drop may have a value of about 0.7V, which may correspond to a voltage equivalent to the drop of the FET diode of the battery protection circuit 314 . That is, the internal switch of the FET of the battery protection circuit 314 may be shorted at a specified voltage during the charging process, and the voltage of the battery pack 310 may drop during this process. A process of changing the voltage of the battery pack 310 according to the switch operation will be described in detail with reference to FIG. 6C .

Looking at 625, it can be seen that the voltage 610 of the battery pack 310 reaches 3.2V and drops to 2.5V once, similarly to 621. This voltage drop may have a value of about 0.7V, which may correspond to a voltage equivalent to the drop of the FET diode of the battery protection circuit 314 . That is, the internal switch of the FET of the battery protection circuit 314 may be shorted at a specified voltage during the charging process, and the voltage of the battery pack 310 may drop during this process.

Looking at 623, it can be seen that the voltage momentarily drops from 3V to 2.3V and then returns to 3V. This will be explained in detail in Fig. 6c.

Referring to FIG. 6B , the processor 320 may classify the sections according to the occurrence of voltage fluctuations greater than or equal to a set value specified on the voltage 610 graph of the battery pack 310 . The processor 320 may classify the section to the right of the second voltage drop section as the first section 601 with reference to 625, except for 623, which is an instantaneous voltage change section. The processor 320 may classify the section between 621 and 625 as the second section 602 based on the first voltage drop section 621 . The processor 320 may classify the left side of the first voltage drop period 621 as a third period 603 .

According to various embodiments, for example, the value of the voltage of the battery pack 310 measured by the processor 320 may correspond to 2.8V (eg, 650, 652, or 654). Due to the structure of the battery pack 310 , it may be difficult to directly measure the voltage of the battery cell 312 . Therefore, when the voltage of the battery pack 310 corresponds to 2.8V, it may be difficult for the user to determine whether the voltage of the battery cell 312 is 650, 652, or 654. If the actual battery cell 312 corresponds to the 650 section, the voltage of the battery corresponds to the low voltage section, so charging control may be required. However, since the user cannot know the actual interval of the battery cell 312 , it may be difficult to accurately design the charge control. In order to overcome this, an accurate value of the battery cell 312 may be required. However, as previously mentioned in FIG. 4 , it is difficult to accurately measure the voltage of the battery cell 312 due to the structure of the battery pack 310 , and if a circuit is further installed therein for accurate measurement, the cost may increase.

According to various embodiments, the section of the battery cell 312 may be determined according to the voltage of the battery pack 310 and the number of occurrences of voltage fluctuations greater than or equal to a specified set value without an additional circuit therein. Also, an accurate value of the battery cell 312 may be predicted according to the interval of the battery cell 312 . During the charging process of the battery, voltages of the battery pack 310 and the battery cell 312 may increase. On the graph, it can move upwards to the right. If the value of the voltage of the battery pack 310 measured by the processor 320 is 2.8V, the processor 320 may continuously monitor the process of increasing the voltage of the battery pack 310 . The processor 320 may monitor the voltage of the battery pack 310 until it reaches a specific voltage (eg, about 3.3V). The limit value of monitoring has been described above with reference to FIG. 6A. In the process of increasing the voltage of the battery pack 310 , the voltage value may be changed according to the open/short switch of the switch. This may be a fluctuation exceeding a specified set value (about 0.3V), and the processor 320 may also measure the number of such fluctuations in the voltage measurement process.

For example, when the voltage of the battery cell 312 corresponds to a section 654, the voltage of the battery pack 310 may increase without a change of more than a specified set value during a charging process directed to the right at the point 654 . In this case, the number of voltage fluctuations greater than the specified set value may be measured as 0. When the voltage of the battery cell 312 corresponds to the 652 section, the voltage of the battery pack 310 may be increased after one time of change of more than a specified set value during the charging process directed to the right at the point 652 . In this case, the number of voltage fluctuations greater than the specified set value may be measured as 1. When the voltage of the battery cell 312 corresponds to the 650 section, the voltage of the battery pack 310 may increase after twice a change of greater than or equal to a specified set value during a charging process directed to the right at the point 650 . In this case, the number of voltage fluctuations greater than the specified set value may be measured as 2.

According to various embodiments, the processor 320 may measure the voltage 610 of the battery pack 310 during the charging process, and classify the sections according to the number of times the measured voltage 610 of the battery pack 310 changes. . For example, when the number of occurrences of the voltage fluctuation is 0, the processor 320 may determine the voltage of the battery cell 312 as the first period 601 . The processor 320 may determine the voltage of the battery cell 312 as the second period 602 when the number of occurrences of the voltage change is 1. The processor 320 may determine the voltage of the battery cell 312 as the third period 603 when the number of occurrences of the voltage change is two.

According to various embodiments, the voltage of the battery cell 312 may be calculated based on the voltage range of the battery cell 312 . For example, when it is determined that the voltage of the battery cell 312 is the first period 601 , the processor 320 determines that the voltage of the battery cell 312 is the same as the voltage of the battery pack 310 , and the battery cell The voltage of 312 can be calculated. When it is determined that the voltage of the battery cell 312 is the second period 602 , the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by a first set value, The voltage of cell 312 can be calculated. When it is determined that the voltage of the battery cell 312 is the third period 603 , the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by a second set value, The voltage of cell 312 can be calculated. The first set value may include about 0.7V corresponding to a diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 . The second set value may correspond to about 1.4V, which is twice the diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 .

Referring to the graph of FIG. 6B , it can be seen that the voltage of the battery pack 310 differs from the voltage of the battery cell by 2*VF in the low voltage section in which the voltage of the battery cell 312 is less than about 1.8V. VF may include a voltage change value of the battery pack 310 according to the open/short of the first switch 401 . The voltage change value of the battery pack 310 according to the open/short of the first switch 401 may include a voltage equivalent to the FET diode drop, and this value may include about 0.7V. 2*VF may include a voltage change value according to on/off of the first switch 401 and the second switch 401, and the value may include about 1.4V, twice 0.7V.

In a section in which the voltage of the battery cell 312 is greater than or equal to about 1.8V and less than 2.3V, the processor 320 may determine that the low voltage section is out of the range, and may short the open first switch. In this case, the voltage of the battery pack 310 may decrease as much as the FET diode drop according to the short circuit of the first switch. In the low voltage section, the battery pack 310 voltage differs from the battery cell 312 voltage by 2*VF, but in the section where it is about 1.8V or more and less than 2.3V, it is reduced by half from 2VF and can differ by VF (about 0.7V). have.

According to various embodiments, when the voltage of the battery pack 310 is equal to or greater than the first voltage value, the processor 320 may determine that the voltage of the battery cell 312 is the same as the voltage of the battery pack 310 . have. The first voltage value may correspond to about 3.2V, and may include a right portion of the first section 601 in the graph of FIG. 6B .

According to various embodiments, the processor 320 determines that when the voltage of the battery pack 310 is less than the second voltage value, the voltage of the battery cell 312 is higher than the voltage of the battery pack 310 by a specified setting value (eg, 2VF). or as low as about 1.4V). The second voltage value may correspond to about 1.8V, and may include a left portion of the second section 602 in the graph of FIG. 6B . In this case, the processor 320 may calculate the voltage of the battery cell 312 by subtracting about 1.4V, which is twice the diode drop value, from the voltage of the battery pack 310 .

6C is a graph illustrating changes of the first switch 401 and the second switch 402 together during a voltage change process of the battery pack 310 during charging.

According to various embodiments,

voltage fluctuations

621 , 623 , and 625 greater than a specified set value may occur during a voltage change process of the battery pack 310 during charging. Looking at the first voltage change 621 , when the voltage of the battery pack 310 reaches 3.2V, the first switch 401 may be shorted at 631 . The first switch 401 may collect a voltage equal to the diode drop when open. In the low voltage (about 3.2V or less) section, the first switch 401 may be opened to add a voltage equal to the diode drop to the voltage of the battery cell 312 . When the voltage of the battery pack 310 is out of the low voltage range, the first switch 401 may be shorted at 631 . In this case, the voltage of the battery pack 310 may drop by about 0.7V corresponding to the diode drop. Through this process in step 621 , a drop in the voltage of the battery pack 310 may be observed. In the subsequent charging process, the voltage of the battery pack 310 may increase again.

According to various embodiments, when the voltage of the battery pack 310 reaches 3V, the second switch 402 may be shorted at 633 . The second switch 402 may exist in an open state during the low voltage charging process. When the second switch 402 is in an open state, like the above-mentioned first switch 401 , a voltage equal to the diode drop may be collected and added to the voltage of the battery cell 312 . It has been described above that the first switch 401 may be shorted in the process of leaving the low voltage range. When the voltage of the battery pack 310 reaches about 3.0V while the first switch 401 is shorted, the second switch 402 may be shorted to lower the voltage of the battery pack 310 at 633 . In this case, the voltage of the battery pack 310 may momentarily drop by 0.7V corresponding to the diode drop value. That is, the voltage of the battery pack 310 corresponding to about 3V may drop to about 2.3V. In this process, the shorted first switch 401 may be opened again. The first switch 401 may be opened to supplement the voltage of the battery pack 310 in a low voltage range of about 2.3V, and may add a voltage value equal to a diode drop to the voltage of the battery pack 310 . That is, in the instantaneous drop and recovery process of 623 , as the second switch 402 is shorted at 633 , the battery pack 310 voltage drops, and the first switch 401 opens due to the drop in the battery pack 310 voltage. This may occur because the voltage of the battery pack 310 rises again while

According to various embodiments, the processor 320 may detect an instantaneous change such as 623 while monitoring the voltage of the battery pack 310 . Momentary changes such as 623 can reduce the accuracy of voltage measurements. The processor 320 may use a weighted average method to improve voltage measurement accuracy of the battery pack 310 . The weighted average method may include a method of obtaining an average value by giving a greater weight to past data than to the most recent data. For example, the average may be calculated by placing a 95% weight on the value measured immediately before and 5% weight on the newly measured value. In this case, even if there is a sudden change in the newly measured value, if the change is not continuously maintained, a large change may not be shown on the entire graph. Through this method, the processor 320 can measure the voltage relatively accurately despite the instantaneous change like 623 .

According to various embodiments, the voltage of the battery pack 310 may continuously increase during the charging process. At 633 , the second switch 402 may be shorted and the battery pack 310 voltage may continue to increase to reach about 3.2V. In this case, the first switch 401 opened at 633 may be short again at 635 . A process in which the voltage of the battery pack 310 decreases by about 0.7V when the first switch 401 is short has been described above. Thereafter, the voltage of the battery pack 310 may continuously increase during the voltage charging process. However, in this case, since the voltage of the battery pack 310 may exceed the low voltage range (about 3.2V), the electronic device 300 may perform stable charging even if the battery protection circuit 314 does not operate.

7A illustrates the battery pack 310 voltage and the battery cell 312 voltage when the battery cell 312 voltage corresponds to the first period 601 . According to various embodiments, the first section 601 may correspond to a case in which the number of voltage fluctuations equal to or greater than a specified set value is zero. This has been described in detail in FIG. 6B . Due to the short circuit of the first switch 401 and the second switch 402 in the first period 601 , the voltage of the battery pack 310 may be the same as the voltage of the battery cell 312 . In this case, the processor 320 may determine the voltage of the battery cell 312 through the voltage of the battery pack 310 . A section 710 in which the difference between the voltage of the battery pack 310 and the voltage of the battery cell 312 does not appear on the graph may be identified.

7B illustrates the battery pack 310 voltage and the battery cell 312 voltage when the battery cell 312 voltage corresponds to the second period 602 . According to various embodiments, the second section 602 may correspond to a case in which the number of voltage fluctuations equal to or greater than a specified set value is one. This has been described in detail in FIG. 6B . Due to the opening of the first switch 401 in the second section 602 , the voltage of the battery pack 310 may be higher than the voltage of the battery cell 312 by about 0.7V by diode drop. In this case, the processor 320 may calculate the battery cell 312 voltage by subtracting 0.7 from the battery pack 310 voltage. On the graph, a section 720 in which the difference between the voltage of the battery pack 310 and the voltage of the battery cell 312 is 0.7 may be identified.

7C illustrates the battery pack 310 voltage and the battery cell 312 voltage when the battery cell 312 voltage corresponds to the third period 603 . According to various embodiments, the third section 603 may correspond to a case in which the number of voltage fluctuations equal to or greater than a specified set value is twice. This has been described in detail in FIG. 6B . Due to the opening of the first switch 401 and the second switch 402 in the third section 603, the voltage of the battery pack 310 may be higher than the voltage of the battery cell 312 by about 1.4V, which is twice the diode drop. have. In this case, the processor 320 may calculate the battery cell 312 voltage by subtracting 1.4 from the battery pack 310 voltage. On the graph, a section 730 in which the difference between the voltage of the battery pack 310 and the voltage of the battery cell 312 is 1.4 may be identified.

According to various embodiments, the electronic device 300 includes a battery cell that supplies power (eg, the battery cell 312 of FIG. 3 ), and at least one battery protection circuit connected to the battery cell (eg, the battery cell 312 of FIG. 3 ). a battery protection circuit 314), a battery pack comprising a battery cell and at least one battery protection circuit (eg, battery pack 310 in FIG. 3), a processor operatively coupled to the battery pack For example, the processor 320 of FIG. 3 ) may be included.

When the battery pack is charged by an external power source, the processor monitors until the voltage of the battery pack reaches a preset first voltage or higher, and measures the number of occurrences of voltage fluctuations greater than or equal to a specified set value of the voltage of the battery pack during the monitoring process; , may be set to determine the voltage section of the battery cell based on the measured voltage of the battery pack and the number of voltage fluctuations, and to predict the voltage of the battery cell based on the voltage section of the battery cell.

According to various embodiments, the battery protection circuit includes at least one or more field effect transistors (FETs), and the FETs include a switch (eg, the first switch 401 of FIG. 4 and/or A second switch 402) may be included.

According to various embodiments, the battery protection circuit includes a first battery protection circuit (eg, V _PCM1 in FIG. 4 ) and a second battery protection circuit (eg, V _PCM2 in FIG. 4 ), and the first battery protection circuit includes a first battery protection circuit (eg, V PCM2 in FIG. 4 ). 1 switch (eg, the first switch 401 of FIG. 4 ), and the second battery protection circuit includes a second switch (eg, the second switch 402 of FIG. 4 ), and the voltage range of the battery cell includes a first section, a second section, and a third section, the processor determines the voltage of the battery cell as the first section when the number of occurrences of the voltage change is 0, and when the number of occurrences of the voltage change is 1, the battery cell may be determined as the second period, and when the number of occurrences of voltage fluctuations is 2, the voltage of the battery cell may be determined as the third period.

According to various embodiments, when the voltage of the battery cell is determined to be the first period, the processor may calculate the voltage of the battery cell by determining that the voltage of the battery cell is the same as the voltage of the battery pack.

According to various embodiments, when the voltage of the battery cell is determined to be the second period, the processor may calculate the voltage of the battery cell by determining that the voltage of the battery cell is lower than the voltage of the battery pack by a first set value.

According to various embodiments, when the voltage of the battery cell is determined to be the third period, the processor may calculate the voltage of the battery cell by determining that the voltage of the battery cell is lower than the voltage of the battery pack by the second set value.

According to various embodiments, the first set value may include a diode drop value of a field effect transistor (FET) included in the first battery protection circuit.

According to various embodiments, the second set value includes a diode drop value of a field effect transistor (FET) of the first battery protection circuit and the second battery protection circuit included in the battery protection circuit.

According to various embodiments, when the voltage of the battery pack is equal to or greater than the first voltage value, the processor may determine that the voltage of the battery cell is the same as the voltage of the battery pack.

According to various embodiments, when the voltage of the battery pack is less than the second voltage value, it may be determined that the voltage of the battery cell is lower than the voltage of the battery pack by a specified set value.

According to various embodiments, the electronic device may further include a display. When the voltage of the battery cell is determined to be the second section, the processor may control to display the guide screen through the display to the user. The guide screen may include content warning that charging may be cut off due to low voltage during the charging process.

According to various embodiments, the processor may be set to cut off charging of the battery pack when the voltage of the battery cell is determined to be the third period.

According to various embodiments, in the process of obtaining the voltage value of the battery pack, the processor uses a weighted average method to obtain an average value by giving a greater weight to the past data than to the most recent data, and using the average value to the voltage of the battery pack value can be judged.

The illustrated method 800 may be executed by the electronic device described above with reference to FIGS. 1 to 3 (eg, the electronic device 300 of FIG. 3 ), and the technical features described above will be omitted below.

In operation 810 , the processor 320 may measure the voltage of the battery pack 310 . It may be necessary to measure the voltage of the battery cell 312 in order to implement an accurate charging operation, but it may be difficult to measure the voltage of the battery cell 312 as described above with reference to FIG. 4 .

In operation 820 , the processor 320 may determine the number of voltage changes equal to or greater than a specified set value on the voltage change graph of the battery pack 310 . The specified setpoint may include about 0.3V. The cause of the voltage change exceeding the specified set value and its operation have been described in detail with reference to FIG. 6C above.

In operation 830 , the processor 320 classifies the voltage section of the battery cell 312 according to the number of changes equal to or greater than the specified set value. According to various embodiments, the voltage of the battery cell 312 may be divided into a first period 601 , a second period 602 , and a third period 603 . The processor 320 may determine the voltage of the battery cell 312 as the first period 601 when the number of occurrences of the voltage fluctuation is zero. When the number of occurrences of the voltage change is 1, the processor 320 may determine the voltage of the battery cell 312 as the second period 602 . When the number of occurrences of the voltage change is 2, the processor 320 may determine the voltage of the battery cell 312 as the third period 603 . The process of classifying the voltage of a cell according to the number of voltage fluctuations has been described in detail with reference to FIG. 6B above.

In operation 840 , the processor 320 may predict the voltage of the battery cell 312 according to the interval of the voltage of the battery cell 312 . When it is determined that the voltage of the battery cell 312 is the first period 601 , the processor 320 determines that the voltage of the battery cell 312 is the same as the voltage of the battery pack 310 . voltage can be calculated. When it is determined that the voltage of the battery cell 312 is the second period 602 , the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by a first set value, The voltage of cell 312 can be calculated. When it is determined that the voltage of the battery cell 312 is the third period 603 , the processor 320 determines that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by a second set value, The voltage of cell 312 can be calculated. The first set value may include about 0.7V corresponding to a diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 . The second set value may correspond to about 1.4V, which is twice the diode drop value of a field effect transistor (FET) included in the battery protection circuit 314 .

In operation 850 , the processor 320 may design a charging operation according to a voltage range of the battery cell 312 and a value of the voltage of the battery cell 312 . When it is determined that the voltage of the battery cell 312 is the second period 602 , the processor 320 may warn that charging may be cut off due to the low voltage during the charging process. For example, the processor 320 may display a guide screen indicating that charging may be cut off due to a low voltage through a display (eg, the display module 160 ). When it is determined that the voltage of the battery cell 312 is the third period 603 , the processor 320 may cut off charging of the battery pack 310 .

9A and 9B are flowcharts illustrating a method of charging an electronic device according to various embodiments of the present disclosure;

In operation 910 , the processor 320 may monitor the voltage of the battery pack 310 immediately after charging of the battery pack 310 until the voltage of the battery pack 310 becomes about 3.3V or more. The reason for monitoring the voltage of the battery pack 310 only up to a certain level has been described in detail above with reference to FIG. 6 . The processor 320 may estimate the voltage of the battery cell 312 according to the monitored voltage of the battery pack 310 .

In operation 920 , the processor 320 may determine whether the voltage of the battery pack 310 corresponds to 3.2V or higher. When the voltage of the battery pack 310 is 3.2V or more, in operation 970 , the processor 320 may estimate that the voltage of the battery cell 312 is the same as the voltage of the battery pack 310 . When the voltage of the battery pack 310 is less than 3.2V in operation 920 , the processor 320 may check whether the voltage of the battery pack 310 is less than 2.5V in operation 925 . When the voltage of the battery pack 310 is less than 2.5V, in operation 950, the processor 320 may estimate that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by about 1.4V, which is twice the FET diode drop. have. This estimation process has been described in detail with reference to FIGS. 6A to 6C .

When the voltage of the battery pack 310 is between 2.5V and 3.2V, it may be difficult to estimate the voltage of the battery cell 312 . 6B has been described in detail on the assumption that the voltage of the battery pack 310 is measured to be about 2.8V. When the voltage of the battery pack 310 is between 2.5V and 3.2V, in operation 930, the processor 320 instantaneously exceeds a certain level (about 0.7V) in a negative direction in the process of measuring the voltage of the battery pack 310 . The number of voltage fluctuations can be measured. In operation 940 , when the number of voltage fluctuations is measured twice, the voltage of the battery cell 312 may be determined to be about 1.4V lower than the voltage of the battery pack 310 . This is because it is determined that the first switch 401 and the second switch 402 of the battery protection circuit 314 both exist in an open state and are shorted as the voltage of the battery pack 310 increases. It has been described in detail with reference to FIGS. 7C. In operation 941 , when the number of voltage fluctuations is measured once, the voltage of the battery cell 312 may be determined to be about 0.7V lower than the voltage of the battery pack 310 . This is because it is determined that only the first switch 401 of the battery protection circuit 314 is shorted. This has been described in detail with reference to FIGS. 6A to 7C . In operation 941 , when the number of voltage fluctuations is not measured once, the processor 320 may determine that the number of voltage fluctuations is 0, and may estimate the voltage of the battery cell 312 to be the same as the voltage of the battery pack 310 . . This is because it is already determined that the first switch 401 and the second switch 402 of the battery protection circuit 314 exist in a short state, which has been described in detail with reference to FIGS. 6A to 7C .

In operation 950 , when it is determined that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by about 1.4V, in operation 955 , the processor 320 may perform a charge cutoff operation due to the low voltage. This is to protect the battery pack 310 from overdischarge due to low voltage.

In operation 960, when it is determined that the voltage of the battery cell 312 is lower than the voltage of the battery pack 310 by about 0.7V, in operation 965, the processor 320 may warn of blocking of charging due to the low voltage through the display. have.

According to various embodiments, the charging method of the electronic device 300 includes an operation of monitoring a voltage of a battery pack (eg, the battery pack 310 of FIG. 3 ) and a battery cell (eg, the battery cell 312 of FIG. 3 ). It may include an operation of determining a voltage period of , and an operation of predicting the voltage of the battery cell according to the voltage period of the battery cell. The operation of determining the voltage range of the battery cell is an operation of monitoring the voltage of the battery pack and measuring the number of occurrences of voltage fluctuations greater than or equal to a specified setting value and classifying the voltage interval of the battery cells according to the number of occurrences of voltage fluctuations greater than or equal to a specified setting value may include

According to various embodiments, the operation of monitoring the voltage of the battery pack includes calculating the voltage of the battery pack using a weighted average method, wherein the weighted average method is greater for past data than for most recent data. It may include a process of calculating an average value by assigning weights.

According to various embodiments, the voltage section of the battery cell includes a first section, a second section, and a third section, and the operation of classifying the voltage section of the battery cell according to the number of occurrences of voltage fluctuations greater than or equal to a specified set value is When the number of occurrences is 0, the operation of determining the voltage of the battery cell as the first period, when the number of occurrences of the voltage fluctuation is 1, the operation of determining the voltage of the battery cell as the second period, and when the number of occurrences of the voltage fluctuation is 2 It may include an operation of determining the voltage of the battery cell as the third period.

According to various embodiments, the operation of predicting the voltage of the battery cell according to the voltage period of the battery cell includes determining that the voltage of the battery cell is the same as the voltage of the battery pack when the voltage of the battery cell is determined as the first period. An operation of determining that the voltage of the battery cell is lower than the voltage of the battery pack by the first set value when the voltage of the battery cell is determined as the second period or when the voltage of the battery cell is determined as the third period It may include the operation of determining that the voltage of the battery pack is lower than the voltage of the battery pack by the second set value.

According to various embodiments, the first setting value includes a diode drop value of a field effect transistor (FET) included in the battery protection circuit (eg, the battery protection circuit 314 of FIG. 3 ), and the second setting value is the battery It may include a diode drop value of a field effect transistor (FET) of the first battery protection circuit and the second battery protection circuit included in the protection circuit.

According to various embodiments, when it is determined that the voltage of the battery cell is the second period, the method may further include an operation of warning that charging may be cut off due to a low voltage during the charging process.

According to various embodiments, when it is determined that the voltage of the battery cell is the third period, the operation of cutting off charging of the battery pack may be further included.

The embodiments of the present invention disclosed in the present specification and drawings are merely provided for specific examples in order to easily explain the technical contents according to the embodiments of the present invention and help the understanding of the embodiments of the present invention, and to limit the scope of the embodiments of the present invention It's not what you want to do. Therefore, in the scope of various embodiments of the present invention, in addition to the embodiments disclosed herein, all changes or modifications derived based on the technical ideas of various embodiments of the present invention should be interpreted as being included in the scope of various embodiments of the present invention.

Claims

In an electronic device,

a battery cell that supplies power;

at least one battery protection circuit connected to the battery cell;

a battery pack including the battery cells and at least one battery protection circuit;

a processor operatively coupled to the battery pack;

The processor is

When the battery pack is charged by an external power source, monitoring until the voltage of the battery pack reaches a preset first voltage or more,

Measuring the number of occurrences of voltage fluctuations greater than a specified set value of the voltage of the battery pack in the monitoring process,

determining a voltage section of the battery cell based on the measured voltage of the battery pack and the number of occurrences of the voltage change, and

An electronic device configured to predict a voltage of the battery cell based on a voltage interval of the battery cell.
The method of claim 1,

The battery protection circuit includes at least one field effect transistor (FET),

The FET is

and a switch configured to cut off current in the battery protection circuit.
3. The method of claim 2,

The battery protection circuit includes a first battery protection circuit and a second battery protection circuit,

The first battery protection circuit includes a first switch,

The second battery protection circuit includes a second switch,

The voltage range of the battery cell is

Includes a first section, a second section and a third section,

the processor

When the number of occurrences of the voltage fluctuation is 0

Determining the voltage of the battery cell as a first period,

When the number of occurrences of the voltage fluctuation is 1

determining the voltage of the battery cell as a second period,

When the number of occurrences of the voltage fluctuation is 2

An electronic device for determining the voltage of the battery cell as a third period.
4. The method of claim 3,

the processor

When it is determined that the voltage of the battery cell is the first period

The electronic device calculates the voltage of the battery cell by determining that the voltage of the battery cell is the same as the voltage of the battery pack.
4. The method of claim 3,

the processor

When the voltage of the battery cell is determined to be the second period

The electronic device calculates the voltage of the battery cell by determining that the voltage of the battery cell is lower than the voltage of the battery pack by a first set value.
4. The method of claim 3,

the processor

When the voltage of the battery cell is determined to be the third period

The electronic device calculates the voltage of the battery cell by determining that the voltage of the battery cell is lower than the voltage of the battery pack by a second set value.
6. The method of claim 5,

The first set value is

An electronic device including a diode drop value of a Field Effect Transistor (FET) of the first battery protection circuit included in the battery protection circuit.
7. The method of claim 6,

The second set value is

and a sum of diode drop values of field effect transistors (FETs) of the first battery protection circuit and the second battery protection circuit included in the battery protection circuit.
The method of claim 1,

the processor

When the voltage of the battery pack is equal to or greater than the first voltage value,

The electronic device determines that the voltage of the battery cell is the same as the voltage of the battery pack.
The method of claim 1,

the processor

When the voltage of the battery pack is less than the second voltage value,

The electronic device determines that the voltage of the battery cell is lower than the voltage of the battery pack by a specified set value.
4. The method of claim 3,

further comprising a display,

the processor

When it is determined that the voltage of the battery cell is the second period

Control to display the guide screen through the display to the user,

The guide screen

An electronic device including a warning that charging may be cut off due to low voltage during the charging process.
4. The method of claim 3,

the processor

When the voltage of the battery cell is determined to be the third period

An electronic device configured to block charging of the battery pack.
The method of claim 1,

the processor

In the process of obtaining the voltage value of the battery pack

A weighted average method is used to obtain the average value by giving a greater weight to the past data than to the most recent data.

An electronic device that determines the average value as a voltage value of the battery pack.
A method of charging an electronic device, comprising:

monitoring the voltage of the battery pack;

determining the voltage range of the battery cell; and

Predicting the voltage of the battery cell according to the voltage section of the battery cell,

The operation of determining the voltage section of the battery cell is

Monitoring the voltage of the battery pack and measuring the number of occurrences of voltage fluctuations greater than or equal to a specified set value; And

and classifying the voltage section of the battery cell according to the number of occurrences of voltage fluctuations greater than or equal to a specified set value.
15. The method of claim 14,

The operation of monitoring the voltage of the battery pack is

calculating the voltage of the battery pack using a weighted average method;

The weighted average method is

A method comprising the process of calculating an average value by giving greater weight to the past data than the most recent data.