A battery monitoring system, a battery monitoring method, and an electronic device.

Abstract

The present application provides a battery monitoring system, a battery monitoring method and an electronic device, which belong to the field of battery technology. The battery monitoring system is applied to an electronic device, and the battery monitoring system includes a piezoelectric sensor and a processor. The piezoelectric sensor is located between the battery and the device housing, and the electrical signal output by the piezoelectric sensor is related to the pressure applied to the piezoelectric sensor by the battery and the device housing. The processor is coupled to the piezoelectric sensor, and the processor is configured to: determine the expansion thickness of the battery according to the electrical signal and a first mapping table. In response to the expansion thickness being within a safe range, the capacity retention rate of the battery is determined based on the expansion thickness and the second mapping table, and the health information of the battery is output, and the health information capacity is related to the retention rate. The implementation method of the present application can obtain the expansion thickness of the battery in real time, and output the health information of the battery for early warning, thereby reducing the safety risks brought by battery expansion and reducing safety hazards.

Description

Technical Field

[0001] The present application relates to the field of battery technology, and in particular to a battery monitoring system, a battery monitoring method and an electronic device. Background Art

[0002] In recent years, with the continuous innovation and progress of lithium-ion battery technology, such as the commercial application of advanced battery materials such as silicon-carbon anode and high-voltage lithium cobalt oxide cathode, the battery capacity of portable products such as mobile phones has become larger and larger. The increase in battery capacity means the increase in battery energy, which also increases the safety risk of the battery, thereby increasing the safety risks of users. Summary of the invention

[0003] The embodiments of the present application provide a battery monitoring system, a battery monitoring method and an electronic device for monitoring the health status of a battery and reducing potential safety hazards to users.

[0004] To achieve the above objectives, the embodiments of the present application adopt the following technical solutions:

[0005] In a first aspect, a battery monitoring system is provided, which is applied to an electronic device, wherein the electronic device includes a battery and a device housing, and the battery is arranged in the device housing. The battery monitoring system includes a piezoelectric sensor and a processor; wherein the piezoelectric sensor is located between the battery and the device housing, and the electrical signal output by the piezoelectric sensor is related to the pressure applied to the piezoelectric sensor by the battery and the device housing. The processor is coupled to the piezoelectric sensor, and the processor is configured to: determine the expansion thickness of the battery according to the electrical signal and a first mapping table, and the first mapping table includes a corresponding relationship between the electrical signal and the expansion thickness. In response to the expansion thickness being within a safe range, determine the capacity retention rate of the battery based on the expansion thickness and a second mapping table, and the second mapping table includes a corresponding relationship between the expansion thickness and the capacity retention rate. Output the health information of the battery to the display module of the electronic device, and the health information is related to the capacity retention rate.

[0006] In the implementation mode of the present application, the piezoelectric sensor is arranged between the battery and the device housing of the electronic device. When the battery expands, the battery and the device housing squeeze the piezoelectric sensor. The greater the expansion thickness of the battery, the greater the pressure on the piezoelectric sensor, and the stronger the electrical signal output by the piezoelectric sensor. Therefore, the processor coupled to the piezoelectric sensor can determine the expansion thickness of the battery according to the electrical signal and the first mapping table. If the expansion thickness of the battery is within the safe range, the processor can also determine the capacity retention rate of the battery based on the expansion thickness and the second mapping table, and output the health information of the battery to the display module of the electronic device. The health information is related to the capacity retention rate. In the implementation mode of the present application, the expansion thickness of the battery can be obtained in real time, and the health information of the battery can be output for early warning, thereby reducing the safety risks caused by battery expansion and reducing the safety hazards of users.

[0007] In some possible implementations, the battery monitoring system further includes a sampling circuit, through which the processor is coupled to the piezoelectric sensor. The sampling circuit can sample the electrical signal generated by the piezoelectric sensor and convert the electrical signal from an analog quantity to a digital quantity for subsequent processing by the processor.

[0008] In some possible implementations, the processor is specifically configured to: obtain the battery power. In response to the battery power being greater than a preset threshold, the battery expansion thickness is determined according to the electrical signal and the first mapping table. The battery expansion thickness is also related to the battery power. The same battery has a greater expansion thickness when the power is higher than when the power is lower. Therefore, the expansion thickness when the battery power is lower cannot reflect the maximum expansion thickness of the battery. As the battery charging power continues to increase, the battery will continue to expand. In the implementation of the present application, the processor determines the battery expansion thickness according to the electrical signal only when the battery power is greater than a preset threshold. On the one hand, it can eliminate the interference caused by the small expansion thickness of the battery in the case of low power, that is, when the battery expansion thickness is large, it monitors whether the battery expansion thickness is within the safe range, so that the early expansion problem of the battery can be identified, greatly reducing the safety risks of the user. On the other hand, it can also save the computing resources of the processor.

[0009] In some possible implementations, the processor is further configured to output a warning message in response to the expansion thickness not being within the safe range. For example, the processor may output a warning message through a display module and / or an audio module to remind the user to replace the battery. The processor may also output a warning message to a background server through a communication module (e.g., a wireless communication module or a mobile communication module) to remind the manufacturer to contact the user to replace the battery.

[0010] In some possible implementations, the piezoelectric sensor is a piezoelectric film sensor. The piezoelectric film sensor is relatively small, thereby helping to control the thickness of the electronic device.

[0011] In a second aspect, a battery monitoring method is provided, which is applied to an electronic device, wherein the electronic device includes a battery and a device housing, and the battery is arranged in the device housing. The monitoring method includes: acquiring an electrical signal, the electrical signal is the output signal of a piezoelectric sensor, the piezoelectric sensor is located between the battery and the device housing, and the electrical signal is related to the pressure applied by the battery and the device housing to the piezoelectric sensor. Determine the expansion thickness of the battery according to the electrical signal and a first mapping table, the first mapping table including the correspondence between the electrical signal and the expansion thickness. In response to the expansion thickness being within a safe range, determine the capacity retention rate of the battery based on the expansion thickness and a second mapping table, the second mapping table including the correspondence between the expansion thickness and the capacity retention rate. Output the health information of the battery, the health information is related to the capacity retention rate.

[0012] In some possible implementations, determining the expansion thickness of the battery according to the electrical signal and a first mapping table specifically includes: obtaining the battery power; in response to the battery power being greater than a preset threshold, determining the expansion thickness of the battery according to the electrical signal and the first mapping table, the first mapping table including a correspondence between the electrical signal and the expansion thickness.

[0013] In some possible implementations, the battery monitoring method further includes, in response to the expansion thickness being not within a safe range, outputting a warning message.

[0014] In a third aspect, an electronic device is provided. The electronic device includes a printed circuit board and a battery monitoring system according to any one of the first aspects above; wherein the battery monitoring system includes a piezoelectric sensor and a processor, the piezoelectric sensor is located between a battery and a device housing of the electronic device, the processor is disposed on the printed circuit board, and the piezoelectric sensor is connected to the printed circuit board.

[0015] In a fourth aspect, a computer-readable storage medium is provided, which stores a computer-executable program, wherein the computer-executable program implements any one of the methods in the second aspect when executed by a processor.

[0016] It should be understood that the technical effects of the second to fourth aspects can refer to the technical effects of the first aspect and any of its embodiments, and will not be repeated here. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A schematic diagram of a connection structure of an electronic device provided in an embodiment of the present application;

[0018] Figure 2 A schematic diagram of the structural disassembly of an electronic device provided in an embodiment of the present application;

[0019] Figure 3 A schematic diagram of the assembly and explosion structure of an electronic device provided in an embodiment of the present application;

[0020] Figure 4 A schematic diagram of the structure of a battery monitoring system provided in an embodiment of the present application;

[0021] Figure 5 A schematic diagram of the location of the piezoelectric sensor provided in the embodiment of the present application;

[0022] Figure 6 A schematic diagram of the structure of a piezoelectric film sensor provided in an embodiment of the present application;

[0023] Figure 7 A flowchart of a battery monitoring method provided in an embodiment of the present application.

[0024] Reference numerals: 100, electronic device; 110, device housing; 111, glass cover; 112, middle frame; 113, back cover; 114, graphite sheet; 120, printed circuit board; 121, main board; 122, sub-board; 210, processor; 220, internal memory; 230, power management module; 240, mobile communication module; 250, wireless communication module; 260, external memory interface; 270, USB interface; 280, SIM card interface; 310, display module; 320, audio module; 330, sensor module; 340, antenna; 350, motor; 360, camera; 370, button; 380, battery; 400, battery monitoring system; 410, piezoelectric sensor; 420, sampling circuit; 500, piezoelectric film sensor; 510, first polyimide layer; 520, polyvinylidene fluoride polymer film; 530, second polyimide layer; 540, first copper wire; 550, second copper wire; 560, board-to-board connector. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0026] The terms "first", "second", etc. involved in the embodiments of the present application are only used to distinguish features of the same type and cannot be understood as indicating relative importance, quantity, order, etc.

[0027] The terms "exemplary" or "for example" and the like in the embodiments of the present application are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of the terms "exemplary" or "for example" is intended to present the related concepts in a specific way.

[0028] The terms "coupling" and "connection" involved in the embodiments of the present application should be understood in a broad sense. For example, they may refer to a direct physical connection, or an indirect connection achieved through electronic devices, such as a connection achieved through resistors, inductors, capacitors or other electronic devices.

[0029] The embodiment of the present application provides an electronic device, which can be mobile or fixed. The electronic device can be deployed on land (for example, indoors or outdoors, handheld or vehicle-mounted, etc.), on the water (for example, ships, etc.), or in the air (for example, airplanes, balloons, and satellites, etc.). The electronic device can be called user equipment (UE), access terminal, terminal unit, subscriber unit, terminal station, mobile station (MS), mobile station, terminal agent or terminal device, etc. For example, the electronic device can be a mobile phone, a tablet computer, a laptop computer, a smart bracelet, a smart screen, a smart watch, a headset, a smart speaker, a virtual reality (VR) device, an augmented reality (AR) device, a terminal in industrial control, a terminal in self driving, a terminal in remote medical, a terminal in smart grid, a terminal in transportation safety, a terminal in smart city, a terminal in smart home, etc. The embodiments of the present application do not limit the specific type and structure of the electronic device. A possible structure of the electronic device is described below.

[0030] Taking a mobile phone as an example, Figure 1 The figure shows a schematic diagram of the connection structure of an electronic device. The electronic device 100 includes a processor 210, an internal memory 220, a power management module 230, a mobile communication module 240, a wireless communication module 250, an external memory interface 260, a universal serial bus (USB) interface (hereinafter referred to as USB interface 270), a subscriber identification module (SIM) card interface (hereinafter referred to as SIM card interface 280), etc., a display module 310, an audio module 320, a sensor module 330, an antenna 340, a motor 350, a camera 360, a button 370, a battery 380 and other components.

[0031] Among them, the sensor module 330 may include a pressure sensor, a gyroscope sensor, an air pressure sensor, a magnetic sensor, an acceleration sensor, a distance sensor, a proximity light sensor, a fingerprint sensor, a temperature sensor, a touch sensor, an ambient light sensor and a bone conduction sensor, etc.

[0032] In some embodiments, the processor 210, internal memory 220, power management module 230, mobile communication module 240, wireless communication module 250, external memory interface 260, USB interface 270, SIM card interface 280, etc. may be disposed on a printed circuit board. Figure 2 and Figure 3 As shown, in some embodiments, the printed circuit board 120 and the battery 380 are arranged in the device housing 110 of the electronic device 100. Among them, the device housing 110 may include a glass cover 111 (also referred to as an outer screen), a middle frame 112 and a back cover 113. In some examples, a graphite sheet 114 for dissipating heat for the battery 380 may be provided on the back cover 113. The middle frame 112 is connected to the glass cover 111 and the back cover 113 respectively. In some examples, the middle frame 112 and the back cover 113 may be detachably connected or may be integral. The cavity formed by the glass cover 111, the middle frame 112 and the back cover 113 is used to accommodate the printed circuit board 120 and the battery 380. It can be understood that the structure illustrated in the embodiment of the present application does not constitute a specific limitation on the electronic device 100. In some examples, some components can be disassembled; for example, the printed circuit board 120 may include a main board 121 and a sub-board 122, and the main board 121 and the sub-board 122 are connected by a flexible circuit board ( Figure 2 and Figure 3 In some examples, components such as the display module 310 (the display screen in the display module 310 may be referred to as an inner screen), the audio module 320, the sensor module 330, the antenna 340, the motor 350, the camera 360, and the button 370 are also disposed in the device housing 110 and are all connected to the printed circuit board 120.

[0033] The processor 210 may include one or more processing units, for example, the processor 210 may be a field programmable gate array (FPGA), an application specific integrated circuit (ASIC), a system on chip (SoC), a central processing unit (CPU), an application processor 210 (AP), a network processor (NP), a digital signal processor 210 (DSP), a micro controller unit (MCU), a programmable logic device (PLD), a modem processor, a graphics processor (GPU), an image signal processor (ISP), a controller, a video codec, a baseband processor, and a neural-network processing unit (NPU). Among them, different processing units may be independent devices or integrated into one or more processors. For example, the processor 210 may be an application processor AP. Alternatively, the above-mentioned processor 210 may be integrated into a system on chip (SoC).

[0034] The processor 210 may also be provided with a memory for storing computer instructions and data. In some embodiments, the memory in the processor 210 is a cache memory. The memory may store computer instructions or data that the processor 210 has just used or cyclically used. If the processor 210 needs to use the computer instructions or data again, it may be directly called from the memory. This avoids repeated access, reduces the waiting time of the processor 210, and thus improves the efficiency of the system.

[0035] The wireless communication function of the electronic device 100 can be implemented by the antenna 340, the mobile communication module 240, the wireless communication module 250, the modem, and the baseband processor 210. The antenna 340 is used to transmit and receive electromagnetic wave signals. Each antenna 340 in the electronic device 100 can be used to cover a single or multiple communication frequency bands. Different antennas 340 can also be reused to improve the utilization of the antenna 340.

[0036] The mobile communication module 240 can provide solutions for wireless communications including 2G / 3G / 4G / 5G, etc., applied to the electronic device 100. The wireless communication module 250 can provide solutions for wireless communications including wireless local area networks (WLAN) (such as wireless fidelity (Wi-Fi) networks), Bluetooth (BT), global navigation satellite system (GNSS), frequency modulation (FM), near field communication (NFC), infrared technology (IR), etc., applied to the electronic device 100.

[0037] The external memory interface 260 can be used to connect an external memory card, such as a micro SanDisk (Micro SD) card, to expand the storage capacity of the electronic device 100. The external memory card communicates with the processor 210 through the external memory interface 260 to implement a data storage function. For example, files such as music and videos can be stored in the external memory card.

[0038] The internal memory 220 may be used to store computer executable program codes, which include computer instructions. The processor 210 executes various functional applications and data processing of the electronic device 100 by running the computer instructions stored in the internal memory 220. In addition, the internal memory 220 may include a high-speed random access memory, and may also include a non-volatile memory, such as at least one disk storage device, a flash memory device, a universal flash storage (UFS), etc.

[0039] The memory involved in the embodiments of the present application may be a volatile memory or a non-volatile memory, or may include both volatile and non-volatile memories. Among them, the non-volatile memory may be a read-only memory (ROM), a programmable read-only memory (PROM), an erasable programmable read-only memory (EPROM), an electrically erasable programmable read-only memory (EEPROM), or a flash memory. The volatile memory may be a random access memory (RAM), which is used as an external cache. By way of example but not limitation, many forms of RAM are available, such as static RAM (SRAM), dynamic RAM (DRAM), synchronous DRAM (SDRAM), double data rate SDRAM (DDR SDRAM), enhanced SDRAM (ESDRAM), synchronous link DRAM (SLDRAM), and direct RAM bus RAM (DR RAM). It should be noted that the memory of the systems and methods described herein is intended to include, but is not limited to, these and any other suitable types of memory.

[0040] The audio module 320 may include a speaker, a receiver, a microphone and an earphone interface. The electronic device 100 may implement audio functions through the audio module and the processor 210. For example, music playback, recording, etc. The audio module 320 is used to convert digital audio information into analog audio signal output, and is also used to convert analog audio input into digital audio signals. In some embodiments, the audio module may be arranged in the processor 210, or some functional modules of the audio module may be arranged in the processor 210. The speaker, also known as a "speaker", is used to convert an audio electrical signal into a sound signal. The receiver, also known as a "earpiece", is used to convert an audio electrical signal into a sound signal. The microphone, also known as a "microphone" or a "microphone", is used to convert a sound signal into an electrical signal. The electronic device 100 may be provided with at least one microphone. The earphone interface is used to connect a wired headset. The earphone interface may be a USB interface 270, or may be a 3.5mm open mobile terminal platform (OMTP) standard interface, or a cellular telecommunications industry association of the USA (CTIA) standard interface.

[0041] The button 370 includes a power button, a volume button, etc. The button 370 may be a mechanical button 370 or a touch button 370. The electronic device 100 may receive the button 370 input and generate a key signal input related to the user settings and function control of the electronic device 100. The motor 350 may generate a vibration prompt. The motor 350 may be used for an incoming call vibration prompt or for touch vibration feedback. The SIM card interface 280 is used to connect a SIM card. The SIM card may be inserted into or removed from the SIM card interface 280 to achieve contact and separation with the electronic device 100. The electronic device 100 may support 1 or N SIM card interfaces 280, where N is a positive integer greater than 1. The SIM card interface 280 may support a Nano SIM card, a Micro SIM card, a SIM card, etc. In some embodiments, the electronic device 100 uses an embedded SIM (eSIM) card, and the eSIM card may be embedded in the electronic device 100 and cannot be separated from the electronic device 100.

[0042] The electronic device 100 can implement the shooting function through the ISP, the camera 360, the video codec, the GPU, the display module 310, and the processor 210. The ISP is used to process the data fed back by the camera 360. In some embodiments, the ISP can be set in the camera 360. The camera 360 is used to capture a static image or a video. In some embodiments, the electronic device 100 may include 1 or N cameras 360, where N is a positive integer greater than 1.

[0043] The electronic device 100 can realize the display function through a GPU, a display module 310, and a processor 210. The GPU is a microprocessor for image processing, which connects the display module 310 and the processor 210. The GPU is used to perform mathematical and geometric calculations for graphics rendering. The processor 210 may include one or more GPUs, which execute computer instructions to generate or change display information.

[0044] The battery 380 is coupled to the power management module 230. In some scenarios, the battery 380 can supply power to various devices on the printed circuit board 120 (e.g., the processor 210 and the internal memory 220, etc.), and various components connected to the hard brush circuit board (e.g., the display module 310, the audio module 320, and the sensor module 330, etc.) through the power management module 230. In some scenarios, the power management module 230 can receive charging input from a power adapter to charge the battery 380. The power adapter can be a wireless power adapter, such as a wireless charging base, other electronic devices 100 with reverse wireless charging function, etc. The power management module 230 can receive wireless charging input through the wireless charging coil of the electronic device 100. The power adapter can also be a wired power adapter. For example, the power management module 230 can receive charging input from the wired power adapter through the USB interface 270.

[0045] In recent years, with the continuous innovation and progress of lithium-ion battery technology, such as the commercial application of advanced battery materials such as silicon-carbon anode and high-voltage lithium cobalt oxide cathode, the battery capacity of portable products such as mobile phones has become larger and larger. The increase in battery capacity means the increase in battery energy, which also increases the safety risk of the battery. As the battery ages, users usually discover that the battery is swollen only after the screen or back cover is severely deformed, which greatly increases the safety risks of users.

[0046] The embodiment of the present application provides a battery monitoring system, which is applied to an electronic device 100. The piezoelectric sensor in the battery monitoring system is arranged between the battery 380 and the device housing 110 of the electronic device 100. The piezoelectric sensor can output an electrical signal, and the strength of the electrical signal is related to the pressure applied to the piezoelectric sensor by the battery 380 and the device housing 110. The processor coupled to the piezoelectric sensor can determine the expansion thickness of the battery 380 according to the electrical signal and the first mapping table. If the expansion thickness of the battery 380 is within the safe range, the processor can also determine the capacity retention rate of the battery 380 based on the expansion thickness and the second mapping table, and output the health information of the battery 380, and the health information is related to the capacity retention rate. The embodiment of the present application can obtain the expansion thickness of the battery 380 in real time, and output the health information of the battery 380 for early warning, thereby reducing the safety risks caused by the expansion of the battery 380 and reducing the safety hazards of the user.

[0047] like Figure 4 As shown, the battery monitoring system 400 provided in the embodiment of the present application includes a piezoelectric sensor 410, a sampling circuit 420, a processor 210 and an internal memory 220; in some examples, the sampling circuit 420 can also sample an analog-to-digital converter (ADC). Figure 5 As shown, the piezoelectric sensor 410 is located between the battery 380 and the device housing 110; illustratively, the piezoelectric sensor 410 is located between the battery 380 and the back cover 113, and the battery 380 is a soft pack battery. In some embodiments, the piezoelectric sensor 410 is a piezoelectric film sensor, which helps to control the thickness of the electronic device 100. Figure 6 The schematic diagram of the structure of the piezoelectric film sensor is shown in FIG. Figure 6 As shown, the piezoelectric film sensor 500 includes a first polyimide layer 510, a polyvinylidene fluoride polymer film 520, a second polyimide layer 530, a first copper wire 540 and a second copper wire 550. The first polyimide layer 510, the polyvinylidene fluoride polymer film 520 and the second polyimide layer 530 are stacked in sequence, one end of the first copper wire 540 is arranged between the first polyimide layer 510 and the polyvinylidene fluoride polymer film 520, and the other end of the first copper wire 540 is connected to a board-to-board (BTB) connector 560, one end of the second copper wire 550 is arranged between the second polyimide layer 530 and the polyvinylidene fluoride polymer film 520, and the other end of the second copper wire 550 is connected to the board-to-board connector 560. When the piezoelectric film sensor 500 is subjected to pressure, an electrical signal (voltage) will be generated, and the strength of the generated electrical signal is proportional to the compressive stress.

[0048] The piezoelectric sensor 410 is connected to the printed circuit board 120 via the board-to-board connector 560, and the board-to-board connector 560 can transmit the electrical signal generated by the piezoelectric sensor 410 to the board-to-board connection terminal on the printed circuit board 120. The sampling circuit 420 is disposed on the printed circuit board 120, and the sampling circuit 420 is coupled to the board-to-board connection terminal for connecting the piezoelectric film sensor 500 through the traces on the printed circuit board 120. The sampling circuit 420 can sample the electrical signal generated by the piezoelectric film sensor 500 and convert the electrical signal from an analog quantity to a digital quantity so that the processor 210 can perform subsequent processing.

[0049] The processor 210 is disposed on the printed circuit board 120, and the processor 210 is coupled to the sampling circuit 420 through the wiring on the printed circuit board 120. The processor 210 receives the digital electrical signal output by the sampling circuit 420, and determines the expansion thickness of the battery 380 according to the electrical signal and the first mapping table. In some embodiments, the internal memory 220 coupled to the processor 210 pre-stores a first mapping table, and the first mapping table includes a mapping relationship between the electrical signal and the expansion thickness. The mapping relationship between the electrical signal and the expansion thickness can be obtained through an experiment. The processor 210 can access the internal memory 220, so as to determine the expansion thickness of the battery 380 according to the electrical signal by querying the first mapping table.

[0050] In some embodiments, the processor 210 also obtains the power of the battery 380. When the power of the battery 380 is greater than a preset threshold, the processor 210 determines the expansion thickness of the battery 380 according to the electrical signal. In the case of low power, the expansion thickness of the battery 380 is difficult to represent the maximum expansion thickness of the battery 380. As the charging proceeds, the battery 380 will continue to expand. In the embodiment of the present application, the processor 210 determines the expansion thickness of the battery 380 according to the electrical signal when the power of the battery 380 is greater than a preset threshold. On the one hand, the interference caused by the small expansion thickness of the battery 380 in the case of low power can be eliminated; that is, when the expansion thickness of the battery 380 is large, the expansion thickness of the battery 380 is monitored to see if it is within the safe range, so that the early expansion problem of the battery 380 can be identified, greatly reducing the safety risks of the user. On the other hand, the computing resources of the processor 210 can also be saved. On the other hand, the computing resources of the processor 210 can also be saved.

[0051] In some embodiments, if the expansion thickness of the battery 380 is within the safety interval, the processor 210 determines the capacity retention rate of the battery 380 based on the expansion thickness of the battery 380 and the second mapping table, and outputs the health information of the battery 380. Among them, the health information is related to the capacity retention rate. In some embodiments, the internal memory 220 coupled to the processor 210 is pre-stored with a second mapping table. The second mapping table includes a mapping relationship between the expansion thickness and the number of charge and discharge cycles of the battery 380, and a mapping relationship between the number of charge and discharge cycles of the battery 380 and the capacity retention rate of the battery 380. Among them, the mapping relationship between the expansion thickness and the number of charge and discharge cycles, and the mapping relationship between the number of charge and discharge cycles and the capacity retention rate can be obtained through experiments. The processor 210 can access the internal memory 220, so as to determine the number of charge and discharge cycles according to the expansion thickness by querying the second mapping table, and then determine the capacity retention rate according to the number of charge and discharge cycles.

[0052] In other embodiments, if the expansion thickness is not within the safe range, the processor 210 outputs a warning message. In some examples, the processor 210 may output a warning message through the display module 310 and / or the audio module 320 to remind the user to replace the battery 380. In some examples, the processor 210 may also output a warning message to the background server through a communication module (e.g., a wireless communication module 250 or a mobile communication module 240) to remind the manufacturer to contact the user to replace the battery 380.

[0053] The present application also provides a battery monitoring method, which is applied to an electronic device 100. The electronic device 100 includes a battery 380 and a device housing 110. The battery 380 is disposed in the device housing 110. Figure 7 As shown, the method includes S110-S150, as follows:

[0054] S110. The processor obtains an electrical signal.

[0055] In some embodiments, the electrical signal is the output signal of the piezoelectric sensor 410. The processor 210 is coupled to the piezoelectric sensor 410 through the sampling circuit 420. The sampling circuit 420 converts the electrical signal output by the piezoelectric sensor 410 from an analog quantity to a digital quantity. The processor 210 obtains the digital quantity electrical signal through the sampling circuit 420 for subsequent processing. In the embodiment of the present application, the piezoelectric sensor 410 is located between the battery 380 and the device housing 110, and the electrical signal is related to the pressure applied by the battery 380 and the device housing 110. For example, when the battery 380 expands, the battery 380 and the device housing 110 squeeze the piezoelectric sensor 410. The greater the expansion thickness of the battery 380, the greater the pressure on the piezoelectric sensor 410, and the stronger the electrical signal output by the piezoelectric sensor. In order to control the thickness of the electronic device 100, in some embodiments, the piezoelectric sensor 410 is a piezoelectric film sensor 500.

[0056] S120: The processor determines the expansion thickness of the battery according to the electrical signal and the first mapping table.

[0057] In some embodiments, a first mapping table is pre-stored in the internal memory 220 coupled to the processor 210, and the first mapping table includes a mapping relationship between the electrical signal and the expansion thickness. The mapping relationship between the electrical signal and the expansion thickness can be obtained through an experiment. The processor 210 can access the internal memory 220, and determine the expansion thickness of the battery 380 according to the electrical signal by querying the first mapping table.

[0058] Furthermore, in some embodiments, the processor 210 also obtains the power of the battery 380. When the power of the battery 380 is greater than a preset threshold, the processor 210 determines the expansion thickness of the battery 380 according to the electrical signal and the first mapping table. In this way, the interference caused by the small expansion thickness of the battery 380 in the case of low power can be eliminated, that is, when the expansion thickness of the battery 380 is large, the expansion thickness of the battery 380 is monitored to see whether it is within the safe range, so that the early expansion problem of the battery 380 can be identified, which greatly reduces the safety risks of the user and saves the computing resources of the processor 210.

[0059] S130 , in response to the swelling thickness being within the safety interval, the processor determines a capacity retention rate of the battery based on the swelling thickness and a second mapping table.

[0060] In some embodiments, a second mapping table is also pre-stored in the internal memory 220 coupled to the processor 210. The second mapping table includes a mapping relationship between the expansion thickness and the number of charge and discharge cycles of the battery 380, and a mapping relationship between the number of charge and discharge cycles of the battery 380 and the retention capacity of the battery 380. The mapping relationship between the expansion thickness and the number of charge and discharge cycles, and the mapping relationship between the number of charge and discharge cycles and the retention capacity can be obtained through experiments. The processor 210 can access the internal memory 220, and then determine the number of charge and discharge cycles according to the expansion thickness by querying the second mapping table, and then determine the capacity retention rate according to the number of charge and discharge cycles.

[0061] S140. The processor outputs battery health information.

[0062] The health information is related to the capacity retention rate. In some embodiments, the processor 210 may output the health information to the display module 310 to display the health of the battery 380 to the user through the display module 310 .

[0063] S150: In response to the expansion thickness being not within the safety range, the processor outputs a warning message.

[0064] In some embodiments, the processor 210 can output a warning message through the display module 310 and / or the audio module 320 to remind the user to replace the battery 380. In some embodiments, the processor 210 can also send a warning message to the background server through a communication module (for example, a wireless communication module 250 or a mobile communication module 240) to remind the manufacturer to contact the user to replace the battery 380.

[0065] The present application embodiment provides an electronic device 100, the electronic device 100 includes Figure 4 The battery monitoring system 400 shown. The battery monitoring system 400 sets the piezoelectric sensor 410 between the battery 380 and the device housing 110 of the electronic device 100. When the battery 380 expands, the battery 380 and the device housing 110 squeeze the piezoelectric sensor 410. The greater the expansion thickness of the battery 380, the greater the pressure on the piezoelectric sensor 410, and the stronger the electrical signal output by the piezoelectric sensor. Therefore, the processor 210 coupled to the piezoelectric sensor 410 can determine the expansion thickness of the battery 380 according to the electrical signal and the first mapping table. If the expansion thickness of the battery 380 is within the safe range, the processor 210 can also determine the capacity retention rate of the battery 380 based on the expansion thickness and the second mapping table, and output the health information of the battery 380. The health information is related to the capacity retention rate. The embodiment of the present application can obtain the expansion thickness of the battery 380 in real time, and output the health information of the battery 380 for early warning, thereby reducing the safety risks caused by the expansion of the battery 380 and reducing the safety hazards of the user.

[0066] The present application also provides a computer-readable storage medium. The computer-readable storage medium stores a computer executable program, wherein the computer executable program is executed by a processor to implement the above-mentioned Figure 7 The method shown.

[0067] In the several embodiments provided in the present application, it should be understood that the disclosed battery monitoring system, battery monitoring method and electronic device can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division. There may be other division methods in actual implementation, such as multiple modules or components can be combined or integrated into another device, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or modules, which can be electrical, mechanical or other forms.

[0068] The modules described as separate components may or may not be physically separated, and the components shown as modules may or may not be physical modules, that is, they may be located in one device or distributed on multiple devices. Some or all of the modules may be selected according to actual needs to achieve the purpose of the present embodiment.

[0069] In addition, each functional module in each embodiment of the present application may be integrated into one device, or each module may exist physically separately, or two or more modules may be integrated into one device.

[0070] In the above embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. When implemented using a software program, it can be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When the computer program instructions are loaded and executed on a computer, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable device. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium. For example, the computer instructions may be transmitted from a website site, computer, server or data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or may include one or more servers, data centers and other data storage devices that can be integrated with the medium. The available medium may be a magnetic medium (eg, a floppy disk, a hard disk, a magnetic tape), an optical medium (eg, a DVD), or a semiconductor medium (eg, a solid state disk (SSD)).

[0071] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art who is familiar with the present technical field can easily think of changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims.

Claims

1. A battery monitoring system, characterized in that: Applied in an electronic device, the electronic device comprises a battery and a device housing, the battery is arranged in the device housing; the battery monitoring system comprises: a piezoelectric sensor located between the battery and the device housing, the electrical signal output by the piezoelectric sensor being related to the pressure applied to the piezoelectric sensor by the battery and the device housing; A processor is coupled to the piezoelectric sensor, the processor being configured to: Obtaining the power of the battery; In response to the power level of the battery being greater than a preset threshold, determining the expansion thickness of the battery according to the electrical signal and a first mapping table, wherein the first mapping table includes a correspondence between the electrical signal and the expansion thickness; In response to the swelling thickness being within a safety interval, determining a capacity retention rate of the battery based on the swelling thickness and a second mapping table, wherein the second mapping table includes a correspondence between swelling thickness and capacity retention rate; Outputting health information of the battery, wherein the health information is related to the capacity retention rate.

2. The battery monitoring system according to claim 1, characterized in that: The battery monitoring system further includes a sampling circuit, and the processor is coupled to the piezoelectric sensor through the sampling circuit.

3. The battery monitoring system according to claim 1 or 2, characterized in that: The processor is further configured to output warning information in response to the expansion thickness being not within the safety interval.

4. The battery monitoring system according to claim 1, characterized in that: The piezoelectric sensor is a piezoelectric film sensor.

5. A battery monitoring method, characterized in that: Applied in an electronic device, the electronic device comprises a battery and a device housing, the battery is arranged in the device housing; the monitoring method comprises: Acquire an electrical signal, wherein the electrical signal is an output signal of a piezoelectric sensor, the piezoelectric sensor is located between the battery and the device housing, and the electrical signal is related to the pressure applied by the battery and the device housing to the piezoelectric sensor; Obtaining the power of the battery; In response to the power level of the battery being greater than a preset threshold, determining the expansion thickness of the battery according to the electrical signal and a first mapping table, wherein the first mapping table includes a correspondence between the electrical signal and the expansion thickness; In response to the swelling thickness being within a safety interval, determining a capacity retention rate of the battery based on the swelling thickness and a second mapping table, wherein the second mapping table includes a correspondence between swelling thickness and capacity retention rate; Outputting health information of the battery, wherein the health information is related to the capacity retention rate.

6. The battery monitoring method according to claim 5, characterized in that: The battery monitoring method further includes outputting warning information in response to the expansion thickness being not within the safety interval.

7. An electronic device, characterized in that: It includes a printed circuit board, and the battery monitoring system described in any one of claims 1 to 4 above; wherein the battery monitoring system includes a piezoelectric sensor and a processor, the piezoelectric sensor is located between the battery and the device housing of the electronic device, the processor is arranged on the printed circuit board, and the piezoelectric sensor is connected to the printed circuit board.

8. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores a computer-executable program, wherein the computer-executable program, when executed by a processor, implements the method described in any one of claims 5 to 6.

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