WO2020184732A1 - Apparatus for lengthening battery life span, and control method therefor - Google Patents

Abstract

Disclosed in the present specification are an apparatus for lengthening a battery life span, and a control method therefor. An apparatus for lengthening a battery life span, according to one embodiment of the present invention, comprises a battery, and a control unit for periodically checking the accumulated number of charging cycles of the battery and selectively adjusting a voltage use range of the battery on the basis of the change in the checked accumulated number.

Description

Battery life extension device and control method thereof

The present invention relates to a battery mounted in a digital device, and more particularly, to an apparatus and a control method for extending the life of the battery.

Recently, as a power supply device for devices such as a smart phone, a tablet PC, a wearable device, a wireless vacuum cleaner, a drone, a robot vacuum cleaner, and a wireless speaker, lithium ion batteries are widely used.

However, the lithium-ion battery has a problem in that the lifespan of the lithium-ion battery rapidly decreases as the number of accumulated charging cycles increases, and there is also a problem in that efficiency is not good because the voltage use range of the battery is at a maximum of 4.5V to a minimum of 3.4V.

An object of the present invention is to provide a battery life extension device and a control method thereof capable of increasing the battery use time through a Si-anode battery having a wider voltage range than that of a lithium ion battery.

Another object of the present invention is to provide a battery life extension device capable of selectively adjusting the voltage usage range (maximum voltage to minimum voltage) of a Si-anode battery based on the accumulated number of charge cycles of the Si-anode battery, and a control method thereof It has its purpose.

Another object of the present invention is to provide a battery life extension device and a control method for selectively adjusting the voltage usage range (maximum voltage to minimum voltage) of a Si-anode battery based on the capacity reduction rate of the Si-anode battery. There is a purpose.

The technical problem to be achieved in the present invention is not limited to the above-mentioned technical problem, and other technical problems not mentioned will be clearly understood by those of ordinary skill in the technical field to which the present invention belongs from the following description. .

In order to achieve the above or other objects, according to an aspect of the present invention, the battery life extension apparatus according to the present invention periodically checks the battery and the accumulated number of charging cycles of the battery, and according to the change in the checked accumulated number. And a control unit that selectively adjusts the voltage usage range of the battery based on the battery.

In addition, the control method of the battery life extension apparatus according to the present invention includes the steps of periodically checking the accumulated number of charging cycles of the battery, and selectively adjusting the voltage usage range of the battery based on the change in the checked accumulated number of times. It is made including steps.

The technical solutions that can be obtained in the present invention are not limited to the above-mentioned solutions, and other solutions that are not mentioned are clearly to those of ordinary skill in the technical field to which the present invention belongs from the following description. It will be understandable.

The effects of the present invention are as follows.

According to one of the various embodiments of the present invention, the voltage usage range of the Si-anode battery is gradually lowered based on the accumulated number of charging cycles of the Si-anode battery, thereby extending the life of the battery. to provide.

Another object of the present invention is to provide an effect of extending the life of the battery by gradually lowering the voltage usage range of the Si-anode battery based on the capacity reduction rate of the Si-anode battery.

The effects that can be obtained in the present invention are not limited to the above-mentioned effects, and other effects not mentioned may be clearly understood by those of ordinary skill in the art from the following description. will be.

1 is a block diagram illustrating a configuration of a mobile terminal according to an embodiment of the present invention.

2 is a block diagram of a drone according to an embodiment of the present invention.

3 is a block diagram of a robot cleaner according to an embodiment of the present invention.

4 is a block diagram of a vacuum cleaner according to an embodiment of the present invention.

5 is a block diagram of an apparatus for extending battery life according to an embodiment of the present invention.

6 is a view comparing capacities of a Si-anode battery according to the present invention and a conventional lithium ion battery.

7 is a view comparing voltage ranges of a Si-anode battery according to the present invention and a conventional lithium ion battery.

8 is a flowchart illustrating a control process of the apparatus for extending battery life using the accumulated number of charge cycles of the battery according to the present invention.

9 is a flowchart illustrating a control process of an apparatus for extending battery life using a capacity reduction rate of a battery according to the present invention.

10 is a view showing a voltage use range of a battery adjusted according to the accumulated number of charge cycles of the battery according to the present invention.

Hereinafter, various embodiment(s) of a battery life extension apparatus and a control method thereof according to the present invention will be described with reference to the drawings.

The suffixes "module", "unit", and the like for the components used in the present specification are given only in consideration of the ease of writing the specification, and both may be mixed if necessary. In addition, even when described as an ordinal number such as "1-", "2-", etc., it is not limited to such terms or ordinal numbers, but is merely for convenience of explanation of the term rather than meaning an order. In addition, the terms used in the present specification have also selected general terms that are currently widely used in consideration of functions according to the technical idea of the present invention, but this is due to the intention or custom of a technician working in the field or the emergence of new technologies. It can be different. However, in certain cases, there are terms arbitrarily selected by the applicant, but their meaning will be described in the related description. Accordingly, it is to be understood that the term should be interpreted based on its actual meaning and contents described throughout this specification, not just its name. On the other hand, the contents described in the specification or/and the drawings are not limited thereto as a preferred embodiment according to the present invention, and the scope of the rights should be determined through the claims.

In the present specification, the "battery life extension device" may include all devices that are supplied with power through a battery. For example, a laptop, a smartphone, a tablet PC, a digital broadcasting terminal, a portable multimedia player (PMP), a navigation device, and a slate PC (Slate PC), Ultrabook (Ultrabook), a wearable device (for example, a watch-type terminal, a glass-type terminal, a head mounted display (HMD)), at least one of a drone, a robot cleaner, and a vacuum cleaner may be included. have.

Here, FIG. 1 is a mobile terminal (including laptops and wearable devices) as one of the battery life extension apparatuses according to the present invention, FIG. 2 is a drone as one of the battery life extension apparatuses according to the present invention, and FIG. 3 is A robot cleaner is shown as one of the battery life extension apparatuses, and FIG. 4 shows a vacuum cleaner as one of the battery life extension apparatuses according to the present invention, and will be described in detail in this part.

1 is a block diagram illustrating a configuration of a mobile terminal according to an embodiment of the present invention.

Referring to FIG. 1, the mobile terminal 100 includes a wireless communication unit 110, an input unit 120, a detection unit 140, an output unit 150, an interface unit 160, a memory 170, and a control unit 180. And a power supply unit 190 and the like. Since the components shown in FIG. 1 are not essential for implementing a mobile terminal, the mobile terminal described in the present specification may have more or fewer components than the components listed above.

More specifically, among the components, the wireless communication unit 110 may move between the mobile terminal 100 and the wireless communication system, between the mobile terminal 100 and another mobile terminal 100, or other movement from the mobile terminal 100 It may include one or more modules that enable wireless communication between networks in which the terminal 100 or an external server is located.

The wireless communication unit 110 may include at least one of a broadcast reception module 111, a mobile communication module 112, a wireless Internet module 113, a short-range communication module 114, and a location information module 115. .

The input unit 120 includes a camera 121 or an image input unit for inputting an image signal, a microphone 122 for inputting an audio signal, or an audio input unit, and a user input unit 123 for receiving information from a user, for example, , A touch key, a mechanical key, etc.). The voice data or image data collected by the input unit 120 may be analyzed and processed as a user's control command.

The sensing unit 140 may include one or more sensors for sensing at least one of information in the mobile terminal, information on surrounding environments surrounding the mobile terminal, and user information. For example, the sensing unit 140 includes a proximity sensor 141, an illumination sensor 142, a touch sensor, an acceleration sensor, a magnetic sensor, and gravity. G-sensor, gyroscope sensor, motion sensor, RGB sensor, infrared sensor (IR sensor), fingerprint recognition sensor (finger scan sensor), ultrasonic sensor , Optical sensor (e.g., camera (see 121), microphone (see 122)), battery gage, environmental sensor (e.g., barometer, hygrometer, thermometer, radiation sensor, thermal It may include at least one of a detection sensor, a gas detection sensor, etc.), and a chemical sensor (eg, an electronic nose, a healthcare sensor, a biometric sensor, etc.) Meanwhile, the mobile terminal disclosed in the present specification includes such sensors. Among them, information sensed by at least two or more sensors may be combined and used.

The output unit 150 is for generating an output related to visual, auditory or tactile sense, and includes at least one of the display unit 151, the sound output unit 152, the hap tip module 153, and the light output unit 154 can do. The display unit 151 may implement a touch screen by forming a layer structure or integrally with the touch sensor. Such a touch screen can function as a user input unit 123 that provides an input interface between the mobile terminal 100 and a user, and can provide an output interface between the mobile terminal 100 and a user.

The interface unit 160 serves as a passage between various types of external devices connected to the mobile terminal 100. The interface unit 160 connects a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, and a device equipped with an identification module. It may include at least one of a port, an audio input/output (I/O) port, an input/output (video I/O) port, and an earphone port. The mobile terminal 100 may perform appropriate control related to the connected external device in response to the connection of the external device to the interface unit 160.

The memory 170 may store a plurality of application programs or applications driven by the mobile terminal 100, data for operation of the mobile terminal 100, and commands. At least some of these application programs may be downloaded from an external server through wireless communication. In addition, at least some other of these application programs may exist on the mobile terminal 100 from the time of shipment for basic functions of the mobile terminal 100 (eg, incoming calls, outgoing functions, message receiving and outgoing functions). . Meanwhile, the application program may be stored in the memory 170, installed on the mobile terminal 100, and driven by the controller 180 to perform an operation (or function) of the mobile terminal.

In addition to the operation related to the application program, the controller 180 generally controls the overall operation of the mobile terminal 100. The controller 180 may provide or process appropriate information or functions to a user by processing signals, data, information, etc. input or output through the above-described components or by driving an application program stored in the memory 170.

Also, in order to drive an application program stored in the memory 170, the controller 180 may control at least some of the components examined together with FIG. 1A. Furthermore, in order to drive the application program, the controller 180 may operate by combining at least two or more of the components included in the mobile terminal 100 with each other.

The power supply unit 190 receives external power and internal power under the control of the controller 180 and supplies power to each of the components included in the mobile terminal 100. The power supply unit 190 includes a battery, and the battery may be a built-in battery or a replaceable battery.

In addition, the battery may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

As for the active material of the Si-anode battery as described above, at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) of 99 to 99.99% purity is graphite in a weight ratio of 1 to 15%. It can be formed by mixing with.

At least some of the components may operate in cooperation with each other to implement an operation, control, or control method of a mobile terminal according to various embodiments described below. In addition, the operation, control, or control method of the mobile terminal may be implemented on the mobile terminal by driving at least one application program stored in the memory 170.

In the following, prior to examining various embodiments implemented through the mobile terminal 100 described above, the above-listed components will be described in more detail with reference to FIG. 1.

First, referring to the wireless communication unit 110, the broadcast reception module 111 of the wireless communication unit 110 receives a broadcast signal and/or broadcast-related information from an external broadcast management server through a broadcast channel. The broadcast channel may include a satellite channel and a terrestrial channel. Two or more broadcast receiving modules may be provided to the mobile terminal 100 for simultaneous broadcast reception or broadcast channel switching of at least two broadcast channels.

The mobile communication module 112 includes technical standards or communication methods for mobile communication (eg, Global System for Mobile communication (GSM), Code Division Multi Access (CDMA)), Wideband CDMA (WCDMA), High Speed (HSDPA). Downlink Packet Access), LTE (Long Term Evolution), etc.), transmits and receives radio signals with at least one of a base station, an external terminal, and a server on a mobile communication network.

The wireless Internet module 113 refers to a module for wireless Internet access, and may be built-in or external to the mobile terminal 100. The wireless Internet module 113 is configured to transmit and receive wireless signals in a communication network according to wireless Internet technologies.

Examples of wireless Internet technologies include WLAN (Wireless LAN), WiFi (Wireless Fidelity) Direct, DLNA (Digital Living Network Alliance), Wibro (Wireless broadband), Wimax (World Interoperability for Microwave Access), HSDPA (High Speed Downlink). Packet Access), LTE (Long Term Evolution), and the like, and the wireless Internet module 113 transmits and receives data according to at least one wireless Internet technology in a range including Internet technologies not listed above.

From the point of view that wireless Internet access through Wibro, HSDPA, GSM, CDMA, WCDMA, LTE, etc. is made through a mobile communication network, the wireless Internet module 113 performing wireless Internet access through the mobile communication network is the mobile communication module. It may be understood as a kind of (112).

The short range communication module 114 is for short range communication, and includes Bluetooth, Radio Frequency Identification (RFID), Infrared Data Association (IrDA), Ultra-Wideband (UWB), ZigBee, and NFC. Short-range communication may be supported by using at least one of (Near Field Communication), Wi-Fi (Wireless-Fidelity), and Wi-Fi Direct technology.

The location information module 115 is a module for obtaining a location (or current location) of a mobile terminal, and representative examples thereof include a GPS (Global Positioning System) module or a WiFi (Wireless Fidelity) module. For example, if the mobile terminal utilizes the GPS module, it can acquire the location of the mobile terminal by using a signal transmitted from a GPS satellite. As another example, if the mobile terminal utilizes the Wi-Fi module, the mobile terminal may acquire the location of the mobile terminal based on information of the Wi-Fi module and a wireless access point (AP) that transmits or receives a wireless signal.

Next, looking at the input unit 120 in more detail, the input unit 120 is for inputting image information (or signal), audio information (or signal), or information input from a user. To this end, the mobile terminal 100 may include one or a plurality of cameras 121. The camera 121 processes an image frame such as a still image or a video obtained by an image sensor in a video call mode or a photographing mode. The processed image frame may be displayed on the display unit 151. On the other hand, a plurality of cameras 121 provided in the mobile terminal 100 may be arranged to form a matrix structure, and through the camera 121 forming a matrix structure as described above, various angles or focal points are applied to the mobile terminal 100. A plurality of image information may be input. In addition, the plurality of cameras 121 may be arranged in a stereo structure to obtain a left image and a right image for implementing a stereoscopic image.

The microphone 122 processes an external sound signal into electrical voice data. The processed voice data may be variously utilized according to a function (or an application program being executed) being executed by the mobile terminal 100. Meanwhile, the microphone 122 may be implemented with various noise removal algorithms for removing noise generated in the process of receiving an external sound signal.

The user input unit 123 is for receiving information from the user, and when information is input through the user input unit 123, the controller 180 can control the operation of the mobile terminal 100 to correspond to the input information. . Such, the user input unit 123 is a mechanical (mechanical) input means (or a mechanical key, for example, a button located on the front, rear or side of the mobile terminal 100, a dome switch (dome switch), a jog wheel, Jog switch, etc.) and a touch-type input means. As an example, the touch-type input means comprises a virtual key, a soft key, or a visual key displayed on a touch screen through software processing, or a portion other than the touch screen It may be made of a touch key (touch key) disposed on. On the other hand, the virtual key or visual key can be displayed on the touch screen while having various forms, for example, graphic, text, icon, video, or these It can be made of a combination of.

Meanwhile, the sensing unit 140 senses at least one of information in the mobile terminal, information on a surrounding environment surrounding the mobile terminal, and user information, and generates a sensing signal corresponding thereto. The controller 180 may control the driving or operation of the mobile terminal 100 or perform data processing, functions, or operations related to an application program installed in the mobile terminal 100 based on such a sensing signal. Representative sensors among various sensors that may be included in the sensing unit 140 will be described in more detail.

First, the proximity sensor 141 refers to a sensor that detects the presence or absence of an object approaching a predetermined detection surface or an object existing nearby using the force of an electromagnetic field or infrared rays without mechanical contact. In the proximity sensor 141, the proximity sensor 141 may be disposed in an inner area of the mobile terminal surrounded by the touch screen as described above or near the touch screen. The proximity sensor 141 has a longer lifespan and higher utilization than a contact sensor.

The touch sensor detects a touch (or touch input) applied to the touch screen (or display unit 151) using at least one of various touch methods such as a resistive film method, a capacitive method, an infrared method, an ultrasonic method, and a magnetic field method. do.

As an example, the touch sensor may be configured to convert changes in pressure applied to a specific portion of the touch screen and capacitance generated in a specific portion into an electrical input signal. The touch sensor may be configured to detect a location, area, and pressure at the time of a touch on the touch sensor by a touch object applying a touch on the touch screen. Here, the touch object is an object that applies a touch to the touch sensor, and may be, for example, a finger, a touch pen, a stylus pen, or a pointer.

In this way, when there is a touch input to the touch sensor, the signal(s) corresponding thereto is transmitted to the touch controller. The touch controller processes the signal(s) and then transmits the corresponding data to the controller 180. As a result, the controller 180 can know whether an area of the display unit 151 is touched. Here, the touch controller may be a separate component from the controller 180 or may be the controller 180 itself.

Meanwhile, the controller 180 may perform different controls or perform the same control according to the type of the touch object by touching the touch screen (or a touch key provided in addition to the touch screen). Whether to perform different controls or to perform the same control according to the type of the touch object may be determined according to an operating state of the mobile terminal 100 or an application program being executed.

Meanwhile, the camera 121 is a type of camera sensor, viewed as the configuration of the input unit 120, and the camera sensor includes at least one of a camera 121, a photo sensor, and a laser sensor.

The camera 121 and the laser sensor may be combined with each other to detect a touch of a sensing target for a 3D stereoscopic image. The photosensor may be stacked on the display device, and the photosensor is configured to scan a motion of a sensing object close to the touch screen. More specifically, the photo sensor scans the contents placed on the photo sensor by mounting a photo diode and a transistor (TR) in a row/column and using an electrical signal that changes according to the amount of light applied to the photo diode. That is, the photosensor calculates the coordinates of the sensing object according to the amount of light change, and through this, position information of the sensing object may be obtained.

The display unit 151 displays (outputs) information processed by the mobile terminal 100. For example, the display unit 151 may display execution screen information of an application program driven in the mobile terminal 100, or UI (User Interface) and GUI (Graphic User Interface) information according to such execution screen information. .

In addition, the display unit 151 may be configured as a three-dimensional display unit that displays a three-dimensional image.

A three-dimensional display method such as a stereoscopic method (glasses method), an auto stereoscopic method (no glasses method), and a projection method (holographic method) may be applied to the stereoscopic display unit.

The sound output unit 152 may output audio data received from the wireless communication unit 110 or stored in the memory 170 in a call signal reception, a call mode or a recording mode, a voice recognition mode, a broadcast reception mode, and the like. The sound output unit 152 also outputs sound signals related to functions (eg, call signal reception sound, message reception sound, etc.) performed in the mobile terminal 100. The sound output unit 152 may include a receiver, a speaker, and a buzzer.

The haptic module 153 generates various tactile effects that a user can feel. A typical example of the tactile effect generated by the haptic module 153 may be vibration. The intensity and pattern of vibration generated by the haptic module 153 may be controlled by a user's selection or setting of a controller. For example, the haptic module 153 may synthesize and output different vibrations or sequentially output them.

The light output unit 154 outputs a signal for notifying the occurrence of an event using light from a light source of the mobile terminal 100. Examples of events occurring in the mobile terminal 100 may be message reception, call signal reception, missed call, alarm, schedule notification, e-mail reception, and information reception through an application.

The interface unit 160 serves as a passage for all external devices connected to the mobile terminal 100. The interface unit 160 receives data from an external device or receives power and transmits it to each component inside the mobile terminal 100, or transmits data inside the mobile terminal 100 to an external device. For example, a wired/wireless headset port, an external charger port, a wired/wireless data port, a memory card port, a port for connecting a device equipped with an identification module. (port), an audio input/output (I/O) port, a video input/output (I/O) port, an earphone port, and the like may be included in the interface unit 160.

The memory 170 may store a program for the operation of the controller 180 and may temporarily store input/output data (eg, a phone book, a message, a still image, a video, etc.). The memory 170 may store data on vibrations and sounds of various patterns output when a touch input on the touch screen is performed.

The memory 170 is a flash memory type, a hard disk type, a multimedia card micro type, a card type memory (for example, SD or XD memory), and RAM. (random access memory; RAM), static random access memory (SRAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), programmable read-only memory (PROM), magnetic memory, magnetic It may include at least one type of storage medium among a disk and an optical disk. The mobile terminal 100 may be operated in connection with a web storage that performs a storage function of the memory 170 over the Internet.

Meanwhile, as described above, the controller 180 controls an operation related to an application program and, in general, an overall operation of the mobile terminal 100. For example, when the state of the mobile terminal satisfies a set condition, the controller 180 may execute or release a lock state limiting input of a user's control command for applications.

In addition, the controller 180 performs control and processing related to voice calls, data communication, video calls, etc., or performs pattern recognition processing capable of recognizing handwriting input or drawing input performed on the touch screen as characters and images, respectively. I can. Furthermore, in order to implement various embodiments described below on the mobile terminal 100 according to the present invention, the controller 180 may control any one or a combination of a plurality of components described above.

The power supply unit 190 receives external power and internal power under the control of the controller 180 to supply power necessary for the operation of each component. The power supply unit 190 includes a battery, and the battery may be a built-in battery configured to be rechargeable, and may be detachably coupled to a terminal body for charging or the like.

The battery may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

The negative active material of the Si-anode battery as described above is at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) having a purity of 99 to 99.99% in a weight ratio of 1 to 15%. It can be formed by mixing with graphite.

Further, the power supply unit 190 may include a connection port, and the connection port may be configured as an example of an interface 160 to which an external charger supplying power for charging a battery is electrically connected.

As another example, the power supply unit 190 may be configured to charge the battery in a wireless manner without using the connection port. In this case, the power supply unit 190 uses at least one of an inductive coupling method based on a magnetic induction phenomenon or a magnetic resonance coupling method based on an electromagnetic resonance phenomenon from an external wireless power transmitter. Power can be delivered.

2 is a block diagram of a drone according to an embodiment of the present invention.

Referring to FIG. 2, the drone 200 includes a communication unit 210, a camera unit 220, a driving unit 230, a display unit 240, a sensor unit 250, a battery 260, and a control unit 260. can do.

The communication unit 210 supports communication between the drone 200 and a remote controller (not shown) of the drone. The communication unit 210 may support at least one of radio control (RC) communication, short-range communication, Internet communication, and wireless mobile communication. To this end, the communication unit 210 may be configured to include at least one communication module well known in the technical field of the present invention.

The camera unit 220 photographs the surroundings of the drone 200 in flight as a still or moving image.

The driving unit 230 provides lift for the flight of the drone 200. The driving unit 230 provides take-off, altitude change, hovering and landing functions of the drone 200, and may include one or more propellers for this purpose.

When a plurality of propellers 70 of the drone 200 are provided, flight coordinates of the drone 200 in a three-dimensional space may be moved by controlling the power supplied to each propeller. The three-dimensional space means a space in which the drone 200 can fly, including vertical coordinates and plane coordinates.

The driving unit 230 may include a motor for providing power to one or more propellers 70.

That is, the battery 260 supplies electric energy to the drone 200 including the motor, and may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

The negative active material of the Si-anode battery as described above is at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) of 99 to 99.99% purity in a weight ratio of 1 to 15% It can be formed by mixing with graphite.

The display unit 240 displays an image captured through the camera unit 220 or displays information related to the drone 200.

The sensor unit 250 detects the degree of inclination, altitude, and flight direction of the drone 200. To this end, the sensor unit 230 may include at least one sensor capable of recognizing state information of the drone 200, such as a gyro sensor, an acceleration sensor, and a geomagnetic sensor.

The controller 260 controls the overall operation of each component of the drone 200 described above. The control unit 260 is a CPU (Central Processing Unit), MPU (Micro Processor Unit), MCU (Micro Controller Unit), AP (Application Processor), AP (Application Processor), or any form well known in the technical field of the present invention. It may be configured to include at least one processor. The controller 260 may perform an operation on at least one application or program for executing the method according to the embodiments of the present invention.

3 is a block diagram of a robot cleaner according to an embodiment of the present invention.

3, the robot cleaner 300 includes an input unit 310, an obstacle detecting unit 320, a driving distance detecting unit 330, a driving direction detecting unit 340, a driving driving unit 350, a cleaning device driving unit 360. , A storage unit 370, a battery 380, and a control unit 390.

The input unit 310 includes a plurality of buttons on the upper portion of the main body or on the remote control so as to receive a moving/driving or cleaning command of the robot cleaner 300 from a user.

The obstacle detection unit 320 is for detecting obstacles such as furniture, office equipment, and walls installed in the cleaning area in which the robot cleaner 300 travels, and transmits ultrasonic waves to the path in which the robot cleaner 300 travels, It detects the presence or absence of an obstacle and the direction of the obstacle by receiving the ultrasonic wave that is reflected from the collision.

In this case, the obstacle detection unit 320 may be configured as an infrared sensor so as to transmit infrared rays and receive reflected infrared rays composed of a plurality of infrared light emitting devices and light receiving devices.

The travel distance detection unit 330 is for detecting the distance traveled by the robot cleaner 300, and detects the distance traveled by the robot cleaner 300 by measuring the amount of rotation of the driving wheels 21 and 22.

The driving direction detection unit 340 is for detecting the moving direction and the rotation angle of the robot cleaner 300, and may be composed of a rotation angle sensor such as a gyro sensor capable of detecting the rotation angle of the robot cleaner 300. have.

The controller 390 controls the overall operation of the robot cleaner 300 and, when a cleaning command is received from the robot cleaner 300, controls the robot cleaner 300 to run and perform cleaning.

Based on the location information recognized by the control unit 390 and the obstacle information detected by the obstacle detection unit 320, the driving driving unit 350 allows the robot cleaner 300 to self-drive the cleaning area without colliding with a wall or an obstacle. The driving wheels 21 and 22 installed in the lower part of the main body of the robot cleaner 300 are driven so that direction change such as rotation is possible.

The cleaning device driving unit 360 sucks foreign substances such as dust from the floor of the cleaning area in which the robot cleaner 300 runs according to a control signal from the control unit 390, and performs a cleaning operation by the main and side brush motors 33 and 43. ).

The storage unit 370 stores a driving pattern and a travel path set in advance according to a cleaning command of the robot vacuum cleaner 300, and information on obstacles detected during a driving process of the robot vacuum cleaner 300.

The battery 380 supplies electric energy to the robot cleaner 300 and may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

The negative active material of the Si-anode battery as described above is at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) of 99 to 99.99% purity in a weight ratio of 1 to 15% It can be formed by mixing with graphite.

4 is a block diagram of a vacuum cleaner according to an embodiment of the present invention.

4, the vacuum cleaner 400 includes an input unit 410, an output unit 420, a battery 430, a driving unit 440, a dust removal unit 450, a dust storage unit 460, and a control unit 470. ).

The input unit 410 receives various control commands for the cleaner from the user. The input unit 410 may include one or more buttons. For example, the input unit 410 provides a control button for controlling the output of the cleaner, a power button for turning on/off the power of the cleaner, and an operation mode of the cleaner. It may include a mode setting button for selection and the like.

In addition, the input unit 410 may have the form of a touch screen together with the output unit 420.

The output unit 420 may display information related to an output level, a battery state, or an operation mode on the screen.

The output unit 420 may further include sound output means for aurally outputting information related to the operation of the cleaner performed by the control unit 470. For example, the output unit 420 may output a warning sound to the outside according to the warning signal generated by the control unit 470.

At this time, the sound output means may be a means for outputting sound such as a beeper or a speaker, and the output unit 120 uses audio data or message data having a predetermined pattern stored in a memory (not shown). Thus, it can be output to the outside through the sound output means.

The battery 430 supplies electric energy to the vacuum cleaner 430, and may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

The negative active material of the Si-anode battery as described above is at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) of 99 to 99.99% purity in a weight ratio of 1 to 15% It can be formed by mixing with graphite.

The driving unit 440 provides suction power by a motor, but the motor may be a brushless DC (BLDC) motor used in a general vacuum cleaner, but is not limited thereto. The driving unit 440 may include a suction motor and a suction fan that is rotated by the suction motor to generate suction power. Further, the driving unit 440 may include a wheel for moving the main body and a driving motor for transmitting a driving force to the wheel.

The dust removal unit 450 and the dust storage unit 460 may be installed inside or outside the body to facilitate coupling and separation with the body. For example, at least one of the dust removal unit 450 and the dust storage unit 460 may include a handle. The user can easily attach and detach at least one of the dust removal unit 450 and the dust storage unit 460 from the body while holding the handle.

Meanwhile, the dust storage unit 460 may include a container for storing dust. The container is provided in communication with the dust removing unit 450 to store dust separated by the dust removing unit 450.

The controller 470 controls overall operations of components included in the cleaner.

5 is a block diagram of an apparatus for extending battery life according to an embodiment of the present invention.

The battery life extension apparatus 500 according to the present invention may include all devices using an existing lithium-ion battery. For example, a laptop computer, a smartphone, a tablet PC, a digital broadcasting terminal, a portable multimedia player (PMP), a navigation system, At least one of a slate PC, an ultrabook, a wearable device, for example, a watch type terminal, a glass type terminal, a head mounted display (HMD), a drone, a robot cleaner, and a vacuum cleaner Can be included.

In addition, the battery life extension device 500 according to the present invention may be included in the mobile terminal of FIG. 1, the drone of FIG. 2, the robot cleaner of FIG. 3, or the vacuum cleaner of FIG. 4.

Referring to FIG. 5, the battery 510 may be a Si-anode battery including a Si-anode active material according to the present invention.

The available voltage range of the Si-anode battery is the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 2.75V, and has a voltage range of the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V. Battery performance is better than lithium-ion batteries.

In other words, Si-anode batteries have higher energy density than conventional lithium-ion batteries, so they can be used up to a low voltage range.

The negative active material of the Si-anode battery as described above is at least one of Si-pure, SiOx (0.5≤x≤1.5) and SiOC (C=1-3%) having a purity of 99 to 99.99% in a weight ratio of 1 to 15%. It can be formed by mixing with graphite.

The battery 510 as described above is at least one of the battery of the mobile terminal of FIG. 1, the battery 260 of the drone of FIG. 2, the battery 380 of the robot cleaner of FIG. 3, and the battery 430 of the vacuum cleaner of FIG. Can be.

The communication unit 520 provides at least one of mobile communication, wireless Internet communication, and short-range wireless communication.

The communication unit 520 as described above may be at least one of the wireless communication unit 110 of the mobile terminal of FIG. 1 and the communication unit 210 of FIG. 2.

The memory 530 may store a plurality of data and commands for operating the battery life extension apparatus 500. In addition, the memory 530 may store data related to an extension of the life of the battery 530 performed under the control of the controller 540.

As an example, the memory 530 may store the accumulated number of charging cycles of the battery 530 and may include a table in which voltage use range adjustment values of the battery 530 per the stored accumulated number are described. A description related to the table will be described later.

The controller 540 controls the overall operation of the battery life extension device 500 according to the present invention, and the controller 180 of the mobile terminal of FIG. 1, the controller 270 of the drone of FIG. 2, and the robot cleaner of FIG. It may be at least one of the controller 390 and the controller 390 of the vacuum cleaner of FIG. 4.

When charging is completed after the battery 510 starts charging for the first time, the control unit 540 as described above stores the number of charging cycles of the battery 510 in the memory 530, and then when the battery 510 is charged. Each time, the number of charging cycles of the battery 510 is accumulated and stored in the memory 530.

Further, the controller 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530, and selectively adjusts the voltage usage range of the battery 510 based on the change in the checked accumulated number. do.

6 is a view comparing capacities of a Si-anode battery according to the present invention and a conventional lithium ion battery.

Referring to FIG. 6, it can be seen that the lithium-ion battery and the Si-anode battery 510 have the same capacity, and when the cut-off voltage is lowered, the Si-anode battery 510 can be used longer than the conventional lithium-ion battery. I can.

7 is a view comparing voltage ranges of a Si-anode battery according to the present invention and a conventional lithium ion battery.

Referring to FIG. 7, the voltage range that can be used in the lithium ion battery is a maximum voltage (Vmax) 4.5V to a minimum voltage (Vmin) 3.4V, and in the case of the Si-anode battery 510 according to the present invention, the total available voltage The range of use is from 4.5V of maximum voltage (Vmax) to 2.75V of minimum voltage (Vmin), which can be used up to 2.75V of low voltage.

That is, the controller 540 initially sets the voltage use range of the battery 510 to the maximum voltage (Vmax) 4.5V to the minimum voltage (Vmin) 3.4V equal to the voltage use range of the lithium ion battery.

And, the controller 540 uses a preset voltage range (4.5V ~ 3.4V) of the battery 510 whenever the accumulated number of charging cycles of the checked battery 510 exceeds a preset accumulated number. The battery life can be increased by gradually decreasing it to the range (4.15V to 2.75V).

At this time, in the case of the Si-anode battery 510, when 800 charging cycles are performed, there is a problem that the capacity is reduced to 80% compared to the initial battery capacity.

Accordingly, in the present invention, when the number of charging cycles of 800 times is divided into a plurality of sections, and the accumulated number of current battery charging cycles is a number corresponding to a specific section among the divided sections, the battery is used within the voltage range corresponding to the specific section. You can extend the battery's usage time by lowering the voltage range of.

In this case, in the present invention, the number of charge cycles of 800 is divided into 100 sections, and the control unit 540 determines the number of accumulated charge cycles of the checked battery 510 exceeds 100 times. The maximum voltage in the voltage usage range is continuously lowered to 10 to 50 mV, and the minimum voltage is continuously lowered to 50 to 100 mV, and as a result, it can be lowered to 4.15 V to 2.75 V.

8 is a flowchart illustrating a control process of the apparatus for extending battery life using the accumulated number of charge cycles of the battery according to the present invention.

Referring to FIG. 8, when the battery 510 is in a fresh state [S810], the controller 540 sets a voltage range of the battery 510 to 4.5V to 3.4V.

When charging is completed after the battery 510 starts charging for the first time, the controller 540 stores the number of charging cycles of the battery 510 in the memory 530, and then whenever the battery 510 is charged, the battery ( The number of charging cycles of the 510) is accumulated in the memory 530 and stored.

In addition, the control unit 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530, and when the checked accumulated number exceeds 100 [S821], a 4.5V ~ 3.4V voltage is used. Adjust the range down to 4.45V ~ 3.3V [S822].

In addition, the control unit 540 adjusts the down-adjusted voltage usage range to 4.45V to 2.75V when an event such as an emergency occurs while the checked cumulative number does not exceed 100 times [S891], Adjust the low voltage to 2.75 so that it can be used in an emergency situation [S892].

The emergency situation is a situation in which a text informing the user's safety such as a national disaster, a local disaster, terrorism, accident, etc. is received from a police station, a national disaster center, or an accident center through the communication unit 510, or a communication unit ( 510), a situation in which the user must make a phone call to report that a problem has occurred in the user's person.

Next, the controller 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 in a state in which the voltage use range of the battery 510 is lowered to 4.45V to 3.3V. If the accumulated number of checks exceeds 200 [S831], the 4.45V ~ 3.3V voltage range is lowered to 4.4V ~ 3.2V [S832].

Next, the control unit 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 while the voltage use range of the battery 510 is lowered to 4.4V to 3.2V. If the accumulated number of checks exceeds 300 [S841], the voltage range of 4.4V ~ 3.2V is lowered to 4.35V ~ 3.1V [S842].

Next, the control unit 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 in a state in which the voltage use range of the battery 510 is lowered to 4.35V to 3.1V. If the accumulated number of checks exceeds 400 [S851], the 4.35V ~ 3.1V voltage range is lowered to 4.3V ~ 3.0V [S852].

Next, the control unit 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 while the voltage use range of the battery 510 is lowered to 4.3V to 3.0V. , If the checked accumulated number of times exceeds 500 [S861], the 4.3V ~ 3.0V voltage range is lowered to 4.25V ~ 2.9V [S862].

Next, the controller 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 in a state in which the voltage use range of the battery 510 is lowered to 4.25 V to 2.9 V. If the accumulated number of checks exceeds 600 [S871], the 4.25V ~ 2.9V voltage range is lowered to 4.2V ~ 2.8V [S872].

Finally, the controller 540 periodically checks the accumulated number of charging cycles of the battery 510 stored in the memory 530 in a state in which the voltage use range of the battery 510 is lowered to 4.2V ~ 2.8V, If the accumulated number of checks finally exceeds 700 [S881], the range of using the 4.2V ~ 2.8V voltage is finally lowered to 4.15V ~ 2.75V [S882].

Meanwhile, in the present invention, as shown in FIG. 9 below, the life of the battery 510 may be extended by using the capacity reduction rate of the battery 510.

The controller 540 may periodically check the capacity reduction rate of the battery 510 and selectively adjust the voltage usage range of the battery based on the checked capacity reduction rate.

That is, whenever the capacity of the battery 510 is reduced by 2 to 3%, the controller 540 continuously lowers the maximum voltage of the voltage use range of the battery 510 to 10 to 50 mV, and lowers the minimum voltage to 50 to 100 mV. As a result, it can be adjusted down to 4.15V to 2.75V.

9 is a flowchart illustrating a control process of an apparatus for extending battery life using a capacity reduction rate of a battery according to the present invention.

Referring to FIG. 9, when the battery 510 is in a fresh state [S910], the controller 540 sets the voltage range of the battery 510 to 4.5V to 3.4V.

Then, the control unit 540 continuously checks whether the capacity of the battery 510 is reduced from the capacity when the battery 510 is initially released, and when the capacity of the battery 510 is reduced by 2 to 3% [S921], 4.5V ~ Lower the 3.4V voltage range to 4.45V ~ 3.3V [S922].

In addition, when an event such as an emergency occurs while the capacity of the battery 510 is not reduced by 2 to 3% [S991], the control unit 540 adjusts the lowered voltage use range to 4.45V to 2.75V. By adjusting, the low voltage is adjusted up to 2.75 so that it can be used in an emergency situation [S992].

Next, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage use range of the battery 510 is lowered to 4.45V ~ 3.3V, and the checked battery 510 ), if the capacity of) is reduced by 2~3% [S931], adjust the 4.45V ~ 3.3V voltage range down to 4.4V ~ 3.2V [S932].

Next, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage use range of the battery 510 is lowered to 4.4V to 3.2V, and the checked battery 510 If the capacity of) decreases by 2~3% again [S941], the range of 4.4V ~ 3.2V voltage use is lowered to 4.35V ~ 3.1V [S942].

Next, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage use range of the battery 510 is lowered to 4.35V to 3.1V, and the checked battery 510 If the capacity of) is reduced by 2~3% again [S951], the voltage range of 4.35V ~ 3.1V is lowered to 4.3V ~ 3.0V [S952].

Next, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage use range of the battery 510 is lowered to 4.3V to 3.0V, and the checked battery 510 If the capacity of) is reduced by 2~3% [S961], the 4.3V ~ 3.0V voltage range is lowered to 4.25V ~ 2.9V [S962].

Next, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage usage range of the battery 510 is lowered to 4.25V to 2.9V, and the checked battery 510 If the capacity of) is reduced by 2~3% again [S971], lower the 4.25V ~ 2.9V voltage range to 4.2V ~ 2.8V [S972].

Finally, the control unit 540 periodically checks whether the capacity of the battery 510 is reduced while the voltage use range of the battery 510 is lowered to 4.2V ~ 2.8V, and the checked battery 510 [S981], the voltage range of 4.2V ~ 2.8V is finally lowered to 4.15V ~ 2.75V [S982].

Meanwhile, the control unit 540 may extend the life of the battery by using both the accumulated number of charging cycles of the battery and the capacity reduction rate of the battery.

That is, the controller 540 sets the voltage use range of the battery 510 to 4.5V to 3.4V in a state in which the battery 510 is fresh, as in FIGS. 8 and 9.

When charging is completed after the battery 510 starts charging for the first time, the controller 540 stores the number of charging cycles of the battery 510 in the memory 530, and then whenever the battery 510 is charged, the battery ( The number of charging cycles of the 510) is accumulated in the memory 530 and stored.

In addition, when the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 100 and the capacity of the battery 510 is reduced by 2 to 3%, the voltage of 4.5V to 3.4V The usage range can be adjusted down from 4.45V to 3.3V.

Next, the control unit 540 is in a state in which the voltage use range of the battery 510 is lowered to 4.45V to 3.3V, and the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 200 times. At the same time, when the capacity of the battery 510 is reduced by 2 to 3% again, the 4.45V to 3.3V voltage range may be lowered to 4.4V to 3.2V.

Next, the controller 540 is in a state in which the voltage use range of the battery 510 is lowered to 4.4V to 3.2V, and the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 300 times. At the same time, when the capacity of the battery 510 is reduced by 2 to 3% again, the 4.4V to 3.2V voltage range may be lowered to 4.35V to 3.1V.

Next, the control unit 540 is in a state in which the voltage use range of the battery 510 is lowered to 4.35V to 3.1V, and the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 400 times. At the same time, when the capacity of the battery 510 is reduced by 2 to 3% again, the 4.35V to 3.1V voltage range may be lowered to 4.3V to 3.0V.

Next, the control unit 540 is in a state in which the voltage use range of the battery 510 is lowered to 4.3V ~ 3.0V, the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 500 times. At the same time, when the capacity of the battery 510 is reduced by 2 to 3% again, the 4.3V to 3.0V voltage range may be lowered to 4.25V to 2.9V.

Next, the control unit 540 is in a state in which the voltage use range of the battery 510 is lowered to 4.25V to 2.9V, and the accumulated number of charging cycles of the battery 510 stored in the memory 530 exceeds 600 times. At the same time, when the capacity of the battery 510 is reduced by 2 to 3% again, the 4.25V to 2.9V voltage range may be lowered to 4.2V to 2.8V.

Finally, in a state in which the voltage usage range of the battery 510 is lowered to 4.2V ~ 2.8V, the controller 540 finally increases the accumulated number of charging cycles of the battery 510 stored in the memory 530 to 700 times. When the capacity of the battery 510 is exceeded and the capacity of the battery 510 is reduced by 2 to 3% again, the 4.2V to 2.8V voltage range may be finally lowered to 4.15V to 2.75V.

10 is a view showing a voltage use range of a battery adjusted according to the accumulated number of charge cycles of the battery according to the present invention.

Referring to FIG. 10, according to the process of FIG. 8, the battery 510 is cut off to 3.4V in the initial fresh state, and the accumulated number of charge cycles of the battery 510 exceeds 200 times. In a state, it indicates cut-off to 3.2V, and in a state in which the accumulated number of charge cycles of the battery 510 exceeds 400, it indicates that it is cut-off to 3.0V, and the accumulated number of charge cycles of the battery 510 In the state of exceeding 700 times, it indicates cut-off to 2.75V.

That is, in the present invention, in the initial fresh battery state, Si is conserved by operating the device only at 3.4V or higher, which is a region where Si reaction is small.

In addition, as the accumulated number of battery charging cycles increases, the lifespan will deteriorate, so the voltage range of the device is lowered to 3.4V or less.

In addition, according to the accumulated number of battery charging cycles, the capacity of the deteriorated battery is compensated by adjusting it down to at least 2.75V.

The battery life extension apparatus and its control method disclosed in the present specification are not limited to the configuration and method of the above-described embodiments, but the embodiments are all or part of each of the embodiments so that various modifications can be made. It may be configured in combination selectively.

Meanwhile, the control method of the apparatus for extending battery life disclosed in the present specification may be implemented as a code that can be read by a processor on a recording medium that can be read by a processor provided in a digital device. The processor-readable recording medium includes all types of recording devices that store data that can be read by the processor. Examples of recording media that can be read by the processor include ROM, RAM, CD-ROM, magnetic tape, floppy disk, and optical data storage devices, and are implemented in the form of carrier-wave such as transmission through the Internet. Includes being. Further, the processor-readable recording medium is distributed over a computer system connected through a network, so that the processor-readable code can be stored and executed in a distributed manner.

Meanwhile, in the present specification, although it has been described with reference to the accompanying drawings, these are only examples, and are not limited to specific embodiments, and various contents that can be modified and implemented by those of ordinary skill in the art to which the present invention pertains are also claimed. It belongs to the scope of rights under In addition, such modifications should not be individually understood from the technical idea of the present invention.

Claims (11)

1. battery; And

   And a control unit that periodically checks the accumulated number of charging cycles of the battery and selectively adjusts a voltage use range of the battery based on a change in the checked accumulated number of times.
2. The method of claim 1, wherein the battery,

   Device, extend battery life for a battery, including the pure Si- (pure), and at least one SiO _x Si- negative electrode (anode) active material of the SiOC.
3. The method of claim 1, wherein the control unit,

   Whenever the accumulated number of charging cycles of the battery exceeds a preset accumulated number of times, the battery life extension apparatus gradually lowers the voltage use range of the battery to a preset voltage use range.
4. The method of claim 3, wherein the control unit,

   Whenever the checked accumulation number exceeds a preset accumulation number, the maximum voltage of the voltage use range of the battery is lowered to 10 to 50mV, and the minimum voltage is lowered to 50 to 100mV, gradually until the preset voltage use range. Down to, extend battery life.
5. The method of claim 3, wherein the preset cumulative number of times,

   Battery life extension device, including 100 cycles.
6. The method of claim 3, wherein the preset voltage usage range is

   The maximum voltage includes 4.15V,

   Battery life extension device with a minimum voltage of 2.75 V.
7. The method of claim 1, wherein the control unit,

   A battery life extension apparatus for periodically checking a capacity reduction rate of the battery and selectively adjusting a voltage usage range of the battery based on the checked capacity reduction rate.
8. The method of claim 7, wherein the control unit,

   Whenever the capacity of the battery decreases by a preset capacity reduction rate, the maximum voltage of the voltage use range of the battery is lowered to 10 to 50mV, the minimum voltage is lowered to 50 to 100mV, and gradually lowered to the preset voltage use range. Letting, battery life extension device.
9. The method of claim 8, wherein the preset capacity reduction rate,

   Battery life extension device comprising 2 to 3%.
10. The method of claim 3, wherein the control unit,

    When a preset event occurs while the accumulated number of charging cycles of the battery does not exceed the preset accumulated number, the maximum voltage of the voltage range of the battery is adjusted to be 4.45V, and the minimum voltage is 2.75V. Adjusting, battery life extension device.
11. Periodically checking the accumulated number of charging cycles of the battery; And

    And selectively adjusting a voltage use range of the battery based on a change in the checked accumulated number of times.

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