CN110994052A - Method and device for prolonging battery endurance, storage medium and terminal equipment - Google Patents
Method and device for prolonging battery endurance, storage medium and terminal equipment Download PDFInfo
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- CN110994052A CN110994052A CN201911286814.5A CN201911286814A CN110994052A CN 110994052 A CN110994052 A CN 110994052A CN 201911286814 A CN201911286814 A CN 201911286814A CN 110994052 A CN110994052 A CN 110994052A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
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- Y02E60/10—Energy storage using batteries
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Abstract
The embodiment of the invention provides a method and a device for prolonging battery endurance, a storage medium and terminal equipment. According to the invention, at low temperature, whether the change value of the battery core temperature and the difference value are in a linear proportional relation is judged, and when the change value of the battery core temperature and the difference value are in the linear proportional relation, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
Description
Technical Field
The invention belongs to the field of terminal batteries, and particularly relates to a method and a device for prolonging battery endurance, a storage medium and terminal equipment.
Background
With the development of mobile device technology, mobile devices have become items that users carry with them. When the mobile device is in a cold condition, the battery performance of the mobile device is greatly influenced by temperature, the internal resistance of the battery at a low temperature is increased by 10 times, the internal resistance is generally 150m Ω at a normal temperature of 25 ℃, the internal resistance is increased to 1500m Ω at a low temperature of-10 ℃, and the capacity is reduced to 1/2 of the normal temperature, such as: a battery of nominally 3000mah, 4.4V, a capacity of-10 degrees is only about 1500mah, and even if the battery of the mobile device is sufficiently charged, the mobile device may automatically shut down in a short period of time. In the current scheme, the shutdown voltage at different temperatures is 3.1V, so that the battery can be automatically shut down when the voltage reaches the voltage no matter what the condition is, the shutdown voltage is normal at normal temperature, and the open-circuit voltage of the battery is slightly higher after shutdown. However, under the condition of low temperature, the internal resistance of the battery is abnormally large, the voltage consumed on the internal resistance can reach 0.8V, the open-circuit voltage can be restored to 3.9V after the battery is shut down and the temperature rises again, namely, a large part of the battery capacity is hidden at low temperature, so that the service time of the low-temperature battery is very short. This not only causes trouble to the user in using the mobile device normally, but also results in the user not having time to backup the data and causing data loss.
Therefore, a method and a device for prolonging the endurance of the battery are needed.
Disclosure of Invention
The embodiment of the invention provides a method and a device for prolonging battery endurance, a storage medium and terminal equipment. According to the invention, at low temperature, whether the change value of the battery core temperature and the difference value are in a linear proportional relation is judged, and when the change value of the battery core temperature and the difference value are in the linear proportional relation, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
According to a first aspect of the present invention, there is provided a method of extending battery endurance, comprising: importing a model parameter of a battery at a plurality of preset temperature values; acquiring the cell temperature and the loading voltage of the battery; calculating the open-circuit voltage of the battery at the cell temperature; comparing the open circuit voltage with the on-load voltage to obtain a difference between the open circuit voltage and the on-load voltage; judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship; and when the change value of the battery core temperature is judged to be in a linear proportional relation with the difference value, adjusting the shutdown voltage according to the battery core temperature.
Further, after the step of obtaining the cell temperature of the battery, the method comprises the following steps: calculating the resistance and the capacity of the battery at the cell temperature by a linear interpolation method; and calculating the state of charge value of the battery through an electricity meter.
Further, in the step of calculating the open-circuit voltage of the battery at the cell temperature, the open-circuit voltage is calculated by the resistor and the discharge current of the battery acquired by the electricity meter.
Further, when it is determined that the change value of the cell temperature is in a linear proportional relationship with the difference value, in the step of adjusting the shutdown voltage according to the cell temperature, the shutdown voltage is adjusted to be a first shutdown voltage, where the first shutdown voltage is less than 3.1 volts.
According to a second aspect of the present invention, there is provided an apparatus for extending battery life, comprising: the leading-in module is used for leading in model parameters of a battery at a plurality of preset temperature values; the acquisition module is used for acquiring the cell temperature and the loading voltage of the battery; the calculation module is respectively connected with the acquisition module and the lead-in module, and the calculation module calculates the open-circuit voltage of the battery at the temperature of the battery core; the comparison module is respectively connected with the acquisition module and the calculation module, and is used for comparing the open-circuit voltage with the loaded voltage to obtain a difference value between the open-circuit voltage and the loaded voltage; the judgment module is connected with the calculation module and judges whether the change value of the battery core temperature and the difference value are in a linear proportional relationship or not; and the adjusting module is connected with the judging module and used for adjusting the shutdown voltage according to the cell temperature when the change value of the cell temperature is judged to be in a linear proportional relation with the difference value.
Further, the model parameters include: resistance, open circuit voltage, on-load voltage, capacity, and depth of discharge of the battery.
Further, the calculation module is also used for calculating the resistance and capacity and the state of charge value of the battery at the cell temperature.
Further, the shutdown voltage is a first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts.
According to a third aspect of the present invention, there is provided a storage medium having stored therein a plurality of instructions adapted to be loaded by a processor to perform the method of extending battery life of any of the above.
According to a fourth aspect of the present invention, there is provided a terminal device comprising a processor and a memory, the processor being connected to the memory, the memory being configured to store instructions and data, the processor being configured to perform the steps of any of the above methods for extending battery endurance.
According to the embodiment of the invention, at a low temperature, whether the change value of the cell temperature and the difference value are in a linear proportional relationship is judged, and when the change value of the cell temperature and the difference value are in the linear proportional relationship, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
Drawings
The technical solution and the advantages of the present invention will be apparent from the following detailed description of the embodiments of the present invention with reference to the accompanying drawings.
Fig. 1 is a schematic flowchart illustrating steps of a method for extending battery endurance according to an embodiment of the present invention.
Fig. 2 is a voltage-capacity relationship curve of a battery provided by an embodiment of the invention.
Fig. 3 is a schematic structural diagram of an apparatus for extending battery endurance according to an embodiment of the present invention.
Fig. 4 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Fig. 5 is a schematic structural diagram of a terminal device according to an embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The terms "first," "second," "third," and the like in the description and in the claims, as well as in the drawings, if any, are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the objects so described are interchangeable under appropriate circumstances. Furthermore, the terms "comprising" and "having," as well as any variations thereof, are intended to cover non-exclusive inclusions.
In particular embodiments, the drawings discussed below and the embodiments used to describe the principles of the present disclosure are by way of illustration only and should not be construed to limit the scope of the present disclosure. Those skilled in the art will understand that the principles of the present invention may be implemented in any suitably arranged system. Reference will now be made in detail to the exemplary embodiments, examples of which are illustrated in the accompanying drawings. Further, a terminal according to an exemplary embodiment will be described in detail with reference to the accompanying drawings. Like reference symbols in the various drawings indicate like elements.
The terminology used in the detailed description is for the purpose of describing particular embodiments only and is not intended to be limiting of the inventive concepts. Unless the context clearly dictates otherwise, expressions used in the singular form encompass expressions in the plural form. In the present specification, it is to be understood that terms such as "comprising," "having," and "containing" are intended to specify the presence of stated features, integers, steps, acts, or combinations thereof, as taught in the present specification, and are not intended to preclude the presence or addition of one or more other features, integers, steps, acts, or combinations thereof. Like reference symbols in the various drawings indicate like elements.
As shown in fig. 1, the present invention provides a method for extending battery endurance, which comprises the following steps.
In step S10, model parameters of the battery at a plurality of preset temperature values are imported.
In the embodiment of the invention, model parameters of the battery at a plurality of preset temperature values are established, for example, a mathematical model of the battery discharging according to specific current is established at the temperature of-10 ℃ and-20 ℃, and the parameters comprise the resistance, the open-circuit voltage, the on-load voltage, the capacity, the discharging depth and the like of the battery. The modeling process comprises the following steps: at the temperature of minus 10 ℃, the battery to be tested is fully charged and is left to stand for 35 minutes in an open circuit mode to obtain the open circuit voltage of the battery, if the open circuit voltage of the battery is not less than 3.1 volts, then the circulation operation is carried out (the battery is discharged for 180 seconds (about 500 milliamperes are released), the loaded voltage of the battery is obtained, then the battery is left to stand for 35 minutes in an open circuit mode again to obtain the open circuit voltage of the battery, if the open circuit voltage of the battery is less than 3.1 volts, other operations are not carried out, and the modeling is completed.
And step S20, obtaining the battery core temperature and the loading voltage of the battery.
In the embodiment of the invention, the cell temperature of the battery is obtained by measuring the resistance value of the battery thermistor and then according to the organization relation matrix of the corresponding battery thermistor at each cell temperature.
Wherein, step S20 is followed by:
and step S21, calculating the resistance and the capacity of the battery at the cell temperature by a linear interpolation method.
In the embodiment of the invention, because the battery is kept still for 35 minutes after being discharged in the modeling process, the change of the cell temperature caused by heating in the use process of the battery can be ignored, and the cell temperature and the external environment temperature can be regarded as consistent. Therefore, the resistance and capacity of the battery at a certain cell temperature can be calculated according to the linear interpolation method.
And step S22, calculating the state of charge value of the battery through an electricity meter.
In the embodiment of the invention, the state of charge value of the battery is mapped to the state of charge of the upper layer of the user interface, and the display of the electric quantity of the upper layer is prolonged.
And step S30, calculating the open-circuit voltage of the battery at the cell temperature.
In the embodiment of the present invention, the open-circuit voltage is calculated from the discharge current of the battery obtained by the resistance and the fuel gauge. The open circuit voltage is calculated by the formula V2＝V1+ IR, where V2Is an open circuit voltage, V1I is the on-load voltage, I is the discharge current, and R is the internal resistance (resistance) of the battery.
Step S40, comparing the open-circuit voltage with the loaded voltage to obtain a difference between the open-circuit voltage and the loaded voltage.
And step S50, judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship.
And step S60, when the change value of the battery core temperature is judged to be in linear proportional relation with the difference value, the shutdown voltage is adjusted.
In the embodiment of the invention, when the change value of the battery core temperature and the difference value are judged to be in a linear proportional relation, the discharge current of the battery is in a stable state at the moment, and the condition of adjusting the shutdown voltage is met. For example, when the temperature is reduced to 0 degrees Celsius, the shutdown voltage is reduced to 3.0 volts. When the temperature was reduced to-5 degrees celsius, the shutdown voltage was reduced to 2.9 volts. When the temperature was reduced to-15 degrees celsius, the shutdown voltage was reduced to 2.8 volts.
Specifically, if the temperature is-5 ℃, the method is not used, the normal shutdown voltage (on-load voltage) is 3.1 volts, the open-circuit voltage of the battery is about 3.9 volts after the battery is stood for a period of time after shutdown, the test power consumption is 420 milliamperes, and the internal resistance of the battery is about 1.7 ohms. Since the shutdown voltage is between 2.9 volts and 3.1 volts corresponding to a battery shutdown voltage of between 3.8 volts and 4.0 volts, referring to fig. 2, the battery capacity of approximately 1000 ma-hrs may be used more when using the above method.
According to the embodiment of the invention, at a low temperature, whether the change value of the cell temperature and the difference value are in a linear proportional relationship is judged, and when the change value of the cell temperature and the difference value are in the linear proportional relationship, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
As shown in fig. 3, an embodiment of the present invention provides an apparatus for extending battery endurance, including: the device comprises an importing module 110, an obtaining module 120, a calculating module 130, a comparing module 140, a judging module 150 and an adjusting module 160.
The importing module 110 is used for importing model parameters of a battery at a plurality of preset temperature values.
In the embodiment of the invention, model parameters of the battery at a plurality of preset temperature values are established, for example, a mathematical model of the battery discharging according to specific current is established at the temperature of-10 ℃ and-20 ℃, and the parameters comprise the resistance, the open-circuit voltage, the on-load voltage, the capacity, the discharging depth and the like of the battery. The modeling process comprises the following steps: at-10 ℃, fully charging the battery to be tested and enabling the battery to be tested to be open-circuited and standing for 35 minutes to obtain the open-circuit voltage of the battery, and if the open-circuit voltage of the battery is not less than 3.1 volts, then performing cycle operation (enabling the battery to be discharged for 180 seconds (about 500 milliamperes is released), obtaining the loaded voltage of the battery, and then enabling the battery to be open-circuited and standing for 35 minutes again and obtaining the open-circuit voltage of the battery); if the open circuit voltage of the battery is less than 3.1 volts, no other operations are performed, and the modeling is completed.
The obtaining module 120 is configured to obtain a cell temperature and a load voltage of the battery.
In the embodiment of the invention, the cell temperature of the battery is obtained by measuring the resistance value of the battery thermistor and then according to the organization relation matrix of the corresponding battery thermistor at each cell temperature. In addition, the calculation module 120 is further configured to calculate the resistance and capacity and the state of charge value of the battery at the cell temperature.
Specifically, in the process of modeling, the battery is kept still for 35 minutes after discharging, so that the change of the cell temperature caused by heating in the use process of the battery can be ignored, and the cell temperature and the external environment temperature can be regarded as consistent. Therefore, the resistance and capacity of the battery at a certain cell temperature can be calculated according to the linear interpolation method. And the state of charge value of the battery is mapped to the state of charge of the upper layer of the user interface, so that the display of the electric quantity of the upper layer is prolonged.
The calculation module 130 is connected to the acquisition module 120 and the import module 110 respectively. The calculation module 130 is configured to calculate an open-circuit voltage of the battery at the cell temperature.
In the embodiment of the present invention, the open-circuit voltage is calculated from the discharge current of the battery obtained by the resistance and the fuel gauge. The open circuit voltage is calculated by the formula V2＝V1+ IR, where V2Is an open circuit voltage, V1I is the on-load voltage, I is the discharge current, and R is the internal resistance (resistance) of the battery.
The comparing module 140 is connected to the acquiring module 120 and the calculating module 130 respectively. The comparing module 140 is configured to compare the open-circuit voltage with the loaded voltage to obtain a difference between the open-circuit voltage and the loaded voltage. The comparison module 140 can also compare the cell temperature variation of the battery to obtain a variation value of the cell temperature.
The judging module 150 is connected to the comparing module 140. The judging module is used for judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship.
The adjusting module 160 is connected to the determining module 150. The adjusting module 160 is configured to adjust the shutdown voltage according to the cell temperature when it is determined that the change value of the cell temperature is in a linear proportional relationship with the difference value.
In the embodiment of the invention, when the change value of the battery core temperature and the difference value are judged to be in a linear proportional relation, the discharge current of the battery is in a stable state at the moment, and the condition of adjusting the shutdown voltage is met. For example, when the temperature is reduced to 0 degrees Celsius, the shutdown voltage is reduced to 3.0 volts. When the temperature was reduced to-5 degrees celsius, the shutdown voltage was reduced to 2.9 volts. When the temperature was reduced to-15 degrees celsius, the shutdown voltage was reduced to 2.8 volts.
Specifically, if the temperature is-5 ℃, the method is not used, the normal shutdown voltage (on-load voltage) is 3.1 volts, the open-circuit voltage of the battery is about 3.9 volts after the battery is stood for a period of time after shutdown, the test power consumption is 420 milliamperes, and the internal resistance of the battery is about 1.7 ohms. Since the shutdown voltage is between 2.9 volts and 3.1 volts corresponding to a battery shutdown voltage of between 3.8 volts and 4.0 volts, referring to fig. 2, the battery capacity of approximately 1000 ma-hrs may be used more when using the above method.
According to the embodiment of the invention, at a low temperature, whether the change value of the cell temperature and the difference value are in a linear proportional relationship is judged, and when the change value of the cell temperature and the difference value are in the linear proportional relationship, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
Referring to fig. 4, an embodiment of the present invention further provides a terminal device 200, where the terminal device 200 may be a mobile phone, a tablet, a computer, or other devices. As shown in fig. 4, the terminal device 200 includes a processor 201 and a memory 202. Wherein the processor 201 is connected to the memory 202.
The processor 201 is a control center of the terminal device 200, connects various parts of the entire terminal device by using various interfaces and lines, and performs various functions of the terminal device and processes data by running or loading an application program stored in the memory 202 and calling data stored in the memory 202, thereby performing overall monitoring of the terminal device.
In this embodiment, the terminal device 200 is provided with a plurality of memory partitions, the plurality of memory partitions includes a system partition and a target partition, the processor 201 in the terminal device 200 loads instructions corresponding to processes of one or more application programs into the memory 202 according to the following steps, and the processor 201 runs the application programs stored in the memory 202, so as to implement various functions:
importing a model parameter of a battery at a plurality of preset temperature values;
acquiring the cell temperature and the loading voltage of the battery;
calculating the open-circuit voltage of the battery at the cell temperature;
comparing the open circuit voltage with the on-load voltage to obtain a difference between the open circuit voltage and the on-load voltage;
judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship; and
and when the change value of the cell temperature is judged to be in a linear proportional relation with the difference value, adjusting the shutdown voltage according to the cell temperature.
Fig. 5 shows a specific block diagram of a terminal device 300 provided in an embodiment of the present invention, where the terminal device 300 may be used to implement the method for extending battery endurance provided in the above-mentioned embodiment. The terminal device 300 may be a mobile phone or a tablet.
The RF circuit 310 is used for receiving and transmitting electromagnetic waves, and performing interconversion between the electromagnetic waves and electrical signals, thereby communicating with a communication network or other devices. RF circuitry 310 may include various existing circuit elements for performing these functions, such as an antenna, a radio frequency transceiver, a digital signal processor, an encryption/decryption chip, a Subscriber Identity Module (SIM) card, memory, and so forth. RF circuit 310 may communicate with various networks such as the internet, an intranet, a wireless network, or with other devices over a wireless network. The wireless network may comprise a cellular telephone network, a wireless local area network, or a metropolitan area network. The Wireless network may use various Communication standards, protocols and technologies, including but not limited to Global System for Mobile Communication (GSM), Enhanced Mobile Communication (EDGE), Wideband Code Division Multiple Access (WCDMA), Code Division Multiple Access (CDMA), Time Division Multiple Access (TDMA), Wireless Fidelity (Wi-Fi) (e.g., IEEE802.11a, IEEE802.11 b, IEEE802.11g and/or IEEE802.11 n), Voice over Internet Protocol (VoIP), world wide Microwave Access (Microwave for Wireless), Max-1, and other short message protocols, as well as any other suitable communication protocols, and may even include those that have not yet been developed.
The memory 320 may be used to store software programs and modules, such as program instructions/modules corresponding to the method for extending battery endurance in the above-described embodiment, and the processor 380 executes various functional applications and data processing by running the software programs and modules stored in the memory 320, so as to implement the function of extending battery endurance. The memory 320 may include high speed random access memory and may also include non-volatile memory, such as one or more magnetic storage devices, flash memory, or other non-volatile solid-state memory. In some examples, memory 320 may further include memory located remotely from processor 380, which may be connected to terminal device 300 via a network. Examples of such networks include, but are not limited to, the internet, intranets, local area networks, mobile communication networks, and combinations thereof.
The input unit 330 may be used to receive input numeric or character information and generate keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control. In particular, the input unit 330 may include a touch-sensitive surface 331 as well as other input devices 332. The touch-sensitive surface 331, also referred to as a touch screen or touch pad, may collect touch operations by a user on or near the touch-sensitive surface 331 (e.g., operations by a user on or near the touch-sensitive surface 331 using a finger, a stylus, or any other suitable object or attachment), and drive the corresponding connection device according to a predetermined program. Alternatively, the touch sensitive surface 331 may comprise two parts, a touch detection means and a touch controller. The touch detection device detects the touch direction of a user, detects a signal brought by touch operation and transmits the signal to the touch controller; the touch controller receives touch information from the touch sensing device, converts the touch information into touch point coordinates, sends the touch point coordinates to the processor 380, and can receive and execute commands sent by the processor 380. In addition, the touch-sensitive surface 331 may be implemented using various types of resistive, capacitive, infrared, and surface acoustic waves. The input unit 330 may comprise other input devices 332 in addition to the touch sensitive surface 331. In particular, other input devices 332 may include, but are not limited to, one or more of a physical keyboard, function keys (such as volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like.
The display unit 340 may be used to display information input by or provided to the user and various graphic user interfaces of the terminal apparatus 300, which may be configured by graphics, text, icons, video, and any combination thereof. The Display unit 340 may include a Display panel 341, and optionally, the Display panel 341 may be configured in the form of an LCD (Liquid Crystal Display), an OLED (Organic Light-Emitting Diode), or the like. Further, touch-sensitive surface 331 may overlay display panel 341, and when touch-sensitive surface 331 detects a touch operation thereon or thereabout, communicate to processor 380 to determine the type of touch event, and processor 380 then provides a corresponding visual output on display panel 341 in accordance with the type of touch event. Although in FIG. 5, touch-sensitive surface 331 and display panel 341 are implemented as two separate components for input and output functions, in some embodiments, touch-sensitive surface 331 and display panel 341 may be integrated for input and output functions.
The terminal device 300 may also include at least one sensor 350, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor may include an ambient light sensor that may adjust the brightness of the display panel 341 according to the brightness of ambient light, and a proximity sensor that may turn off the display panel 341 and/or the backlight when the terminal device 300 is moved to the ear. As one of the motion sensors, the gravity acceleration sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when the mobile phone is stationary, and can be used for applications of recognizing the posture of the mobile phone (such as horizontal and vertical screen switching, related games, magnetometer posture calibration), vibration recognition related functions (such as pedometer and tapping), and the like; as for other sensors such as a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured in the terminal device 300, detailed descriptions thereof are omitted.
The terminal device 300 may assist the user in e-mail, web browsing, streaming media access, etc. through the transmission module 370 (e.g., a Wi-Fi module), which provides the user with wireless broadband internet access. Although fig. 5 shows the transmission module 370, it is understood that it does not belong to the essential constitution of the terminal device 300, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The processor 380 is a control center of the terminal device 300, connects various parts of the entire mobile phone using various interfaces and lines, and performs various functions of the terminal device 300 and processes data by running or executing software programs and/or modules stored in the memory 320 and calling data stored in the memory 320, thereby performing overall monitoring of the mobile phone. Optionally, processor 380 may include one or more processing cores; in some embodiments, processor 380 may integrate an application processor, which primarily handles operating systems, user interfaces, applications, etc., and a modem processor, which primarily handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into processor 380.
Terminal device 300 also includes a power supply 390 (e.g., a battery) for powering the various components, which may be logically coupled to processor 380 via a power management system in some embodiments to manage charging, discharging, and power consumption management functions via the power management system. The power supply 390 may also include any component including one or more of a dc or ac power source, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
Although not shown, the terminal device 300 may further include a camera (e.g., a front camera, a rear camera), a bluetooth module, and the like, which are not described in detail herein. Specifically, in this embodiment, the display unit of the terminal device is a touch screen display, the terminal device further includes a memory, and one or more programs, where the one or more programs are stored in the memory and configured to be executed by the one or more processors, and the one or more programs include instructions for:
importing a model parameter of a battery at a plurality of preset temperature values;
acquiring the cell temperature and the loading voltage of the battery;
calculating the open-circuit voltage of the battery at the cell temperature;
comparing the open circuit voltage with the on-load voltage to obtain a difference between the open circuit voltage and the on-load voltage;
judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship; and
and when the change value of the cell temperature is judged to be in a linear proportional relation with the difference value, adjusting the shutdown voltage according to the cell temperature.
In specific implementation, the above modules may be implemented as independent entities, or may be combined arbitrarily to be implemented as the same or several entities, and specific implementation of the above modules may refer to the foregoing method embodiments, which are not described herein again.
It will be understood by those skilled in the art that all or part of the steps of the methods of the above embodiments may be performed by instructions or by instructions controlling associated hardware, and the instructions may be stored in a computer-readable storage medium and loaded and executed by a processor. To this end, embodiments of the present invention provide a storage medium having stored therein a plurality of instructions, which can be loaded by a processor to perform the steps of any of the methods for extending battery endurance provided by embodiments of the present invention.
Wherein the storage medium may include: read Only Memory (ROM), Random Access Memory (RAM), magnetic or optical disks, and the like.
Since the instructions stored in the storage medium may execute the steps in any method for extending battery endurance provided in the embodiments of the present invention, the beneficial effects that can be achieved by any method for extending battery endurance provided in the embodiments of the present invention may be achieved, for details, see the foregoing embodiments, and are not described herein again. The above operations can be implemented in the foregoing embodiments, and are not described in detail herein.
According to the embodiment of the invention, at a low temperature, whether the change value of the cell temperature and the difference value are in a linear proportional relationship is judged, and when the change value of the cell temperature and the difference value are in the linear proportional relationship, the shutdown voltage is adjusted to be the first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts, so that the cruising ability of the battery in a low-temperature environment is improved.
The method, the device, the storage medium, and the terminal device for extending battery endurance provided by the embodiments of the present invention are described in detail above, and a specific example is applied in the description to explain the principle and the implementation of the present invention, and the description of the embodiments is only used to help understanding the method and the core idea of the present invention; meanwhile, for those skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.
Claims (10)
1. A method of extending battery life, comprising:
importing a model parameter of a battery at a plurality of preset temperature values;
acquiring the cell temperature and the loading voltage of the battery;
calculating the open-circuit voltage of the battery at the cell temperature;
comparing the open circuit voltage with the on-load voltage to obtain a difference between the open circuit voltage and the on-load voltage;
judging whether the change value of the cell temperature and the difference value are in a linear proportional relationship; and
and when the change value of the cell temperature is judged to be in a linear proportional relation with the difference value, adjusting the shutdown voltage according to the cell temperature.
2. The method of claim 1, wherein after the step of obtaining the cell temperature of the battery, the method comprises the steps of:
calculating the resistance and the capacity of the battery at the cell temperature by a linear interpolation method; and
and calculating the state of charge value of the battery through an electric meter.
3. The method according to claim 1, wherein in the step of calculating the open-circuit voltage of the battery at the cell temperature, the open-circuit voltage is calculated by the resistance and the discharge current of the battery obtained by the fuel gauge.
4. The method of claim 1, wherein in the step of adjusting the shutdown voltage according to the cell temperature when it is determined that the change value of the cell temperature is in a linear proportional relationship with the difference value, the shutdown voltage is adjusted to be a first shutdown voltage, and the first shutdown voltage is less than 3.1 volts.
5. An apparatus for extending battery life, comprising:
the leading-in module is used for leading in model parameters of a battery at a plurality of preset temperature values;
the acquisition module is used for acquiring the cell temperature and the loading voltage of the battery;
the calculation module is respectively connected with the acquisition module and the lead-in module, and is used for calculating the open-circuit voltage of the battery at the battery core temperature;
the comparison module is respectively connected with the acquisition module and the calculation module, and is used for comparing the open-circuit voltage with the loaded voltage to obtain a difference value between the open-circuit voltage and the loaded voltage;
the judgment module is connected with the comparison module and is used for judging whether the change value of the battery cell temperature and the difference value are in a linear proportional relationship or not; and
and the adjusting module is connected with the judging module and used for adjusting the shutdown voltage according to the cell temperature when the change value of the cell temperature is judged to be in a linear proportional relation with the difference value.
6. The apparatus of claim 5, wherein the model parameters comprise: resistance, open circuit voltage, on-load voltage, capacity, and depth of discharge of the battery.
7. The apparatus of claim 5, wherein the computing module is further configured to compute resistance and capacity and state of charge values of the battery at the cell temperature.
8. The apparatus of claim 5, wherein the shutdown voltage is a first shutdown voltage, wherein the first shutdown voltage is less than 3.1 volts.
9. A storage medium having stored therein a plurality of instructions adapted to be loaded by a processor to perform the method of extending battery life of any of claims 1 to 4.
10. A terminal device comprising a processor coupled to a memory, the memory configured to store instructions and data, and a memory configured to perform the steps of the method of extending battery life of any of claims 1-4.
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| CN110994052B (en) | 2021-07-02 |
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