CN107785961B - Series battery charging method, mobile terminal and computer readable medium - Google Patents
Series battery charging method, mobile terminal and computer readable medium Download PDFInfo
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- CN107785961B CN107785961B CN201711027707.1A CN201711027707A CN107785961B CN 107785961 B CN107785961 B CN 107785961B CN 201711027707 A CN201711027707 A CN 201711027707A CN 107785961 B CN107785961 B CN 107785961B
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0013—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries acting upon several batteries simultaneously or sequentially
- H02J7/0014—Circuits for equalisation of charge between batteries
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Abstract
The invention discloses a series battery charging method, a mobile terminal and a computer readable medium, wherein the method comprises the following steps: when the charging equipment is detected to be inserted, judging whether the output current of the charging equipment meets the charging condition; if yes, controlling an equalizing circuit arranged between the first rechargeable battery and the second rechargeable battery to be connected with an electric quantity equalizing loop, and enabling the first rechargeable battery and the second rechargeable battery to form a loop for electric quantity equalization; monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach balance or not; if so, controlling the equalizing circuit to disconnect the electric quantity equalizing loop, and enabling the first rechargeable battery and the second rechargeable battery to start charging. By adopting the invention, the equalizing circuit is arranged between the first rechargeable battery and the second rechargeable battery which are connected in series, and the charging is carried out after the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery are equalized, so that the service life of the rechargeable battery is prolonged and the use safety of the rechargeable battery is improved.
Description
Technical Field
The present invention relates to the field of charging and battery technologies, and in particular, to a method for charging a series battery, a mobile terminal, and a computer-readable medium.
Background
With the development of science and technology, mobile phones have become the center of personal information, tablets meet the light entertainment requirements of people such as internet surfing, games and videos, and PCs undertake office duties. Although individual products are increasingly powerful in function, the morphological boundaries are increasingly blurred. Digital products are becoming more and more scenarized rather than functional, and large and full products are being extremely demanded. However, the power consumption of a mobile terminal (such as a tablet) with a large size is high, and in order to meet the market use time requirement, the battery capacity is generally over 35Wh, while the common battery capacity is generally about 18Wh, so that two batteries need to be connected in series or in parallel for use.
When using the series battery scheme, the producer can strictly select two electric cores with the same specification and performance to be connected in parallel to form the series battery, but along with the increase of the service time, the electric quantity difference can appear in the two series batteries, and in the series battery charging scheme, the charging current of the two batteries is completely the same, if the electric quantity balance calibration is not carried out on the electric quantities of the two series batteries, the electric quantity difference of the two batteries can become more and more serious, if the electric quantity difference of the two series batteries is larger, the charging abnormity can appear (if one battery is overcharged and the other battery is not fully charged), and the potential safety hazard of charging can be brought.
Therefore, it is necessary to provide a method for charging a series battery, a mobile terminal and a computer readable medium, so as to solve the problem of potential safety hazard in the charging process when a mobile terminal in the prior art adopts a series battery scheme.
Disclosure of Invention
In view of the above, the present invention provides a method for charging a series battery, a mobile terminal and a computer readable medium, so as to solve the problem of potential safety hazard in the charging process when a series battery scheme is adopted in a mobile terminal in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows:
according to a first aspect of the present invention, there is provided a series battery charging method comprising the steps of:
when the charging equipment is detected to be inserted, judging whether the output current of the charging equipment meets the charging condition;
if yes, controlling an equalizing circuit arranged between the first rechargeable battery and the second rechargeable battery to be connected with an electric quantity equalizing loop, and enabling the first rechargeable battery and the second rechargeable battery to form a loop for electric quantity equalization;
monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach balance or not;
if so, controlling the equalizing circuit to disconnect the electric quantity equalizing loop, and enabling the first rechargeable battery and the second rechargeable battery to start charging.
Preferably, the controlling the equalizing circuit between the first rechargeable battery and the second rechargeable battery to make the first rechargeable battery and the second rechargeable battery form an electric quantity equalizing loop for electric quantity equalization includes:
the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched on, and the second MOS transistor Q2 is controlled to be switched off;
the drain of the first MOS transistor Q1 is electrically connected to the anode of the first rechargeable battery, the source is electrically connected to the anode of the second rechargeable battery and the source of the second MOS transistor Q2, the gate is configured to receive a control signal, the drain of the second MOS transistor Q2 is electrically connected to the cathode of the first rechargeable battery and the drain of the MOS transistor Q3, the gate is configured to receive a control signal, the source of the MOS transistor Q3 is electrically connected to the cathode of the second rechargeable battery, and the gate is configured to receive a control signal.
Preferably, the controlling the balancing circuit to disconnect the electric quantity balancing loop includes:
and the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched off, and the second MOS transistor Q2 is controlled to be switched on.
Preferably, the determining whether the output current of the charging device satisfies the charging condition further includes:
when detecting that a charging device is inserted, monitoring whether the output current of the charging device is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
Preferably, the monitoring whether the output current of the charging device is larger than the consumption current of the system includes:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
Preferably, the drain of the first MOS transistor Q1 is connected to the anode of the first rechargeable battery through a sampling resistor R1, and both ends of the R1 are further electrically connected to an equalizing current monitor:
the monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equilibrium includes:
measuring the equalizing current of the sampling circuit for multiple times and calculating the average value of the equalizing current measured for multiple times;
judging whether the average value is within a preset numerical range;
and if so, determining that the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery.
According to a second aspect of the present invention, there is provided a mobile terminal, comprising a charge management controller, an equalizing circuit controller, an equalizing current monitor, a first rechargeable battery and a second rechargeable battery connected in series with the charge management controller, and a charge equalizing circuit disposed between the first rechargeable battery and the second rechargeable battery:
the charging management controller is in communication connection with the equalizing circuit controller and is used for judging whether the output current of the charging equipment meets the charging condition or not when the charging equipment is detected to be inserted;
the equalization circuit controller is used for controlling an electric quantity equalization circuit arranged between the first rechargeable battery and the second rechargeable battery to be connected with an electric quantity equalization loop when the judgment result of the charge management controller is yes, so that the loop is formed between the first rechargeable battery and the second rechargeable battery for electric quantity equalization;
the equalizing current monitor is in communication connection with the equalizing circuit controller and is used for monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equalization;
the equalization circuit controller is further used for controlling the equalization circuit to disconnect the electric quantity equalization loop when the electric quantity of the first rechargeable battery is equalized with the electric quantity of the second rechargeable battery;
the charging management controller is further configured to control the first rechargeable battery and the second rechargeable battery to start charging when the electric quantity balancing circuit is disconnected.
Preferably, the equalizing circuit includes a first MOS transistor Q1, a second MOS transistor Q2 and a third MOS transistor Q3, the drain of the first MOS transistor Q1 is electrically connected to the positive electrode of the first rechargeable battery, the source is electrically connected to the positive electrode of the second rechargeable battery and the source of the second MOS transistor Q2, the gate is electrically connected to the pin Q1_ EN of the equalizing circuit controller, the drain of the second MOS transistor Q2 is electrically connected to the negative electrode of the first rechargeable battery and the drain of the MOS transistor Q3, the gate is electrically connected to the pin Q2_ EN of the equalizing circuit controller, the source of the MOS transistor Q3 is electrically connected to the negative electrode of the second rechargeable battery, and the gate is electrically connected to the pin Q3_ EN of the equalizing circuit;
the equalizing circuit is used for controlling the first MOS tube Q1 and the third MOS tube Q3 to be conducted, and the second MOS tube Q2 to be turned off to control the equalizing circuit to be conducted, so that a current equalizing loop is formed between the first rechargeable battery and the second rechargeable battery to perform electric quantity equalization.
Preferably, the equalizing circuit is further configured to turn off the equalizing circuit by controlling the first MOS transistor Q1 and the third MOS transistor Q3 to be turned off, and controlling the second MOS transistor Q2 to be turned on.
Preferably, the charging management controller is further configured to perform the following steps:
when detecting that a charging device is inserted, monitoring whether the output current of the charging device is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
Preferably, the charging management controller is further configured to perform the following steps:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
Preferably, the drain of the first MOS transistor Q1 is connected to the anode of the first rechargeable battery through a sampling resistor R1, and both ends of the R1 are further electrically connected to the equalizing current monitor:
the balance current monitor is further used for executing the following steps:
monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equilibrium, including:
measuring the equalizing current of the sampling circuit for multiple times and calculating the average value of the equalizing current measured for multiple times;
judging whether the average value is within a preset numerical range;
and if so, determining that the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery.
According to a third aspect of the present invention, there is provided a computer readable medium storing a series battery charging program which, when executed by at least one processor, implements the steps of the picture processing method according to the first aspect.
In the serial battery charging method, the mobile terminal and the computer readable medium of the embodiments of the present invention, the equalizing circuit is disposed between the first rechargeable battery and the second rechargeable battery that are connected in series, and before charging, the equalizing circuit is controlled to connect the electric quantity equalizing circuit, so that a circuit is formed between the first rechargeable battery and the second rechargeable battery for electric quantity equalization, and charging is performed after the electric quantities of the first rechargeable battery and the second rechargeable battery are equalized, thereby prolonging the service life of the rechargeable battery and improving the safety in use.
Drawings
Fig. 1 is a schematic diagram of a hardware structure of a mobile terminal implementing various embodiments of the present invention;
fig. 2 is a flowchart of a method for charging series-connected batteries according to an embodiment of the present invention;
FIG. 3 is a schematic diagram of an equalizing circuit according to a first embodiment of the present invention;
fig. 4 is a schematic structural diagram of a mobile terminal according to a second embodiment of the present invention;
fig. 5, fig. 6 and fig. 7 are flowcharts of another series battery charging method according to a third embodiment of the present invention.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
In the following description, suffixes such as "module", "component", or "unit" used to denote elements are used only for facilitating the explanation of the present invention, and have no specific meaning in itself. Thus, "module", "component" or "unit" may be used mixedly.
The terminal may be implemented in various forms. For example, the terminal described in the present invention may include a mobile terminal such as a mobile phone, a tablet computer, a notebook computer, a palmtop computer, a Personal Digital Assistant (PDA), a Portable Media Player (PMP), a navigation device, a wearable device, a smart band, a pedometer, and the like, and a fixed terminal such as a Digital TV, a desktop computer, and the like.
The following description will be given by way of example of a mobile terminal, and it will be understood by those skilled in the art that the construction according to the embodiment of the present invention can be applied to a fixed type terminal, in addition to elements particularly used for mobile purposes.
Referring to fig. 1, which is a schematic diagram of a hardware structure of a mobile terminal for implementing various embodiments of the present invention, the mobile terminal 100 may include: RF (Radio Frequency) unit 101, WiFi module 102, audio output unit 103, a/V (audio/video) input unit 104, sensor 105, display unit 106, user input unit 107, interface unit 108, memory 109, processor 110, and power supply 111. Those skilled in the art will appreciate that the mobile terminal architecture shown in fig. 1 is not intended to be limiting of mobile terminals, which may include more or fewer components than those shown, or some components may be combined, or a different arrangement of components.
The following describes each component of the mobile terminal in detail with reference to fig. 1:
the radio frequency unit 101 may be configured to receive and transmit signals during information transmission and reception or during a call, and specifically, receive downlink information of a base station and then process the downlink information to the processor 110; in addition, the uplink data is transmitted to the base station. Typically, radio frequency unit 101 includes, but is not limited to, an antenna, at least one amplifier, a transceiver, a coupler, a low noise amplifier, a duplexer, and the like. In addition, the radio frequency unit 101 can also communicate with a network and other devices through wireless communication. The wireless communication may use any communication standard or protocol, including but not limited to GSM (Global System for Mobile communications), GPRS (General Packet Radio Service), CDMA2000(Code Division Multiple Access 2000), WCDMA (Wideband Code Division Multiple Access), TD-SCDMA (Time Division-Synchronous Code Division Multiple Access), FDD-LTE (Frequency Division duplex Long Term Evolution), and TDD-LTE (Time Division duplex Long Term Evolution).
WiFi belongs to short-distance wireless transmission technology, and the mobile terminal can help a user to receive and send e-mails, browse webpages, access streaming media and the like through the WiFi module 102, and provides wireless broadband internet access for the user. Although fig. 1 shows the WiFi module 102, it is understood that it does not belong to the essential constitution of the mobile terminal, and may be omitted entirely as needed within the scope not changing the essence of the invention.
The audio output unit 103 may convert audio data received by the radio frequency unit 101 or the WiFi module 102 or stored in the memory 109 into an audio signal and output as sound when the mobile terminal 100 is in a call signal reception mode, a call mode, a recording mode, a voice recognition mode, a broadcast reception mode, or the like. Also, the audio output unit 103 may also provide audio output related to a specific function performed by the mobile terminal 100 (e.g., a call signal reception sound, a message reception sound, etc.). The audio output unit 103 may include a speaker, a buzzer, and the like.
The a/V input unit 104 is used to receive audio or video signals. The a/V input Unit 104 may include a Graphics Processing Unit (GPU) 1041 and a microphone 1042, the Graphics processor 1041 Processing image data of still pictures or video obtained by an image capturing device (e.g., a camera) in a video capturing mode or an image capturing mode. The processed image frames may be displayed on the display unit 106. The image frames processed by the graphic processor 1041 may be stored in the memory 109 (or other storage medium) or transmitted via the radio frequency unit 101 or the WiFi module 102. The microphone 1042 may receive sounds (audio data) via the microphone 1042 in a phone call mode, a recording mode, a voice recognition mode, or the like, and may be capable of processing such sounds into audio data. The processed audio (voice) data may be converted into a format output transmittable to a mobile communication base station via the radio frequency unit 101 in case of a phone call mode. The microphone 1042 may implement various types of noise cancellation (or suppression) algorithms to cancel (or suppress) noise or interference generated in the course of receiving and transmitting audio signals.
The mobile terminal 100 also includes at least one sensor 105, such as a light sensor, a motion sensor, and other sensors. Specifically, the light sensor includes an ambient light sensor that can adjust the brightness of the display panel 1061 according to the brightness of ambient light, and a proximity sensor that can turn off the display panel 1061 and/or a backlight when the mobile terminal 100 is moved to the ear. As one of the motion sensors, the accelerometer sensor can detect the magnitude of acceleration in each direction (generally, three axes), can detect the magnitude and direction of gravity when stationary, and can be used for applications of recognizing the posture of a 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 fingerprint sensor, a pressure sensor, an iris sensor, a molecular sensor, a gyroscope, a barometer, a hygrometer, a thermometer, and an infrared sensor, which can be configured on the mobile phone, further description is omitted here.
The display unit 106 is used to display information input by a user or information provided to the user. The Display unit 106 may include a Display panel 1061, and the Display panel 1061 may be configured in the form of a Liquid Crystal Display (LCD), an Organic Light-Emitting Diode (OLED), or the like.
The user input unit 107 may be used to receive input numeric or character information and generate key signal inputs related to user settings and function control of the mobile terminal. Specifically, the user input unit 107 may include a touch panel 1071 and other input devices 1072. The touch panel 1071, also referred to as a touch screen, may collect a touch operation performed by a user on or near the touch panel 1071 (e.g., an operation performed by the user on or near the touch panel 1071 using a finger, a stylus, or any other suitable object or accessory), and drive a corresponding connection device according to a predetermined program. The touch panel 1071 may include two parts of a touch detection device 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 110, and can receive and execute commands sent by the processor 110. In addition, the touch panel 1071 may be implemented in various types, such as a resistive type, a capacitive type, an infrared ray, and a surface acoustic wave. In addition to the touch panel 1071, the user input unit 107 may include other input devices 1072. In particular, other input devices 1072 may include, but are not limited to, one or more of a physical keyboard, function keys (e.g., volume control keys, switch keys, etc.), a trackball, a mouse, a joystick, and the like, and are not limited to these specific examples.
Further, the touch panel 1071 may cover the display panel 1061, and when the touch panel 1071 detects a touch operation thereon or nearby, the touch panel 1071 transmits the touch operation to the processor 110 to determine the type of the touch event, and then the processor 110 provides a corresponding visual output on the display panel 1061 according to the type of the touch event. Although the touch panel 1071 and the display panel 1061 are shown in fig. 1 as two separate components to implement the input and output functions of the mobile terminal, in some embodiments, the touch panel 1071 and the display panel 1061 may be integrated to implement the input and output functions of the mobile terminal, and is not limited herein.
The interface unit 108 serves as an interface through which at least one external device is connected to the mobile terminal 100. For example, the external device may include a wired or wireless headset port, an external power supply (or battery charging apparatus) port, a wired or wireless data port, a memory card port, a port for connecting a device having an identification module, an audio input/output (I/O) port, a video I/O port, an earphone port, and the like. The interface unit 108 may be used to receive input (e.g., data information, power, etc.) from external devices and transmit the received input to one or more elements within the mobile terminal 100 or may be used to transmit data between the mobile terminal 100 and external devices.
The memory 109 may be used to store software programs as well as various data. The memory 109 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program required by at least one function (such as a sound playing function, an image playing function, etc.), and the like; the storage data area may store data (such as audio data, a phonebook, etc.) created according to the use of the cellular phone, and the like. Further, the memory 109 may include high speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid state storage device.
The processor 110 is a control center of the mobile terminal, connects various parts of the entire mobile terminal using various interfaces and lines, and performs various functions of the mobile terminal and processes data by operating or executing software programs and/or modules stored in the memory 109 and calling data stored in the memory 109, thereby performing overall monitoring of the mobile terminal. Processor 110 may include one or more processing units; preferably, the processor 110 may integrate an application processor, which mainly handles operating systems, user interfaces, application programs, etc., and a modem processor, which mainly handles wireless communications. It will be appreciated that the modem processor described above may not be integrated into the processor 110.
The mobile terminal 100 may further include a power supply 111 (e.g., a battery) for supplying power to various components, and preferably, the power supply 111 may be logically connected to the processor 110 via a power management system, so as to manage charging, discharging, and power consumption management functions via the power management system.
Although not shown in fig. 1, the mobile terminal 100 may further include a bluetooth module or the like, which is not described in detail herein.
In order to facilitate understanding of the embodiments of the present invention, a communication network system on which the mobile terminal of the present invention is based is described below.
Based on the hardware structure of the mobile terminal, the invention provides various embodiments of the method.
An embodiment of the present invention provides a method for charging a series battery, referring to fig. 2, the method for charging a series battery includes the following steps:
s201, when the insertion of the charging equipment is detected, monitoring whether the output current of the charging equipment meets a charging condition; if yes, go to step S202, otherwise go to step S205;
s202, controlling an equalizing circuit arranged between a first rechargeable battery and a second rechargeable battery to be switched on, and enabling a current equalizing loop to be formed between the first rechargeable battery and the second rechargeable battery for electric quantity equalization;
s203, monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach balance or not, and/or monitoring whether the output current of the charging equipment is smaller than the consumption current of the system at the same moment or not;
s204, if the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery, controlling the equalizing circuit to disconnect the electric quantity equalizing loop, so that the first rechargeable battery and the second rechargeable battery start to charge;
and S205, controlling the first rechargeable battery, the second rechargeable battery and the charging equipment to jointly supply power to the system.
In a possible embodiment, referring to fig. 3, the equalizing circuit has a first MOS transistor Q1 having a drain electrically connected to the positive electrode of the first rechargeable battery, a source electrically connected to the positive electrode of the second rechargeable battery and the source of the second MOS transistor Q2, a gate for receiving a control signal, a drain of the second MOS transistor Q2 electrically connected to the negative electrode of the first rechargeable battery and the drain of the second MOS transistor Q3, a gate for receiving a control signal, a source of the MOS transistor Q3 electrically connected to the negative electrode of the second rechargeable battery, and a gate for receiving a control signal.
At this time, step S202, controlling an equalizing circuit disposed between the first rechargeable battery and the second rechargeable battery to form an electric quantity equalizing loop between the first rechargeable battery and the second rechargeable battery for electric quantity equalization, includes:
the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched on, and the second MOS transistor Q2 is controlled to be switched off.
Step S204, controlling the balancing circuit to disconnect the electric quantity balancing circuit, including:
the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched off, and the second MOS transistor Q2 is controlled to be switched on.
In one possible solution, the determining whether the output current of the charging device satisfies the charging condition further includes:
when detecting that the charging equipment is inserted, monitoring whether the output current of the charging equipment is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
In practical applications, the monitoring whether the output current of the charging device is larger than the consumption current of the system includes:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
In practical applications, if the I _ vbus _ min is greater than the I _ sys _ max, before the step S202 is executed, the method further includes: adjusting the power supply voltage VPH of the system to be higher than the battery voltage;
if the I _ vbus _ min is smaller than the I _ sys _ max, the method further comprises:
adjusting the VPH to be lower than the voltage of the battery, and controlling the equalizing circuit to disconnect the electric quantity equalizing loop, so that the first rechargeable battery, the second rechargeable battery and the charging equipment jointly supply power to the system;
the battery voltage is the voltage of the first rechargeable battery and the second rechargeable battery.
In a possible implementation, with continued reference to fig. 3, the drain of the first MOS transistor Q1 is connected to the anode of the first rechargeable battery through a sampling resistor R1, and both ends of the R1 are also electrically connected to the equalizing current monitor.
Step S203, monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equilibrium, including:
measuring the equalizing current of the sampling circuit for multiple times and calculating the average value of the equalizing current measured for multiple times;
judging whether the average value is within a preset numerical range;
if so, determining that the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery.
In one possible solution, during the balancing of the electric quantity, the method further includes:
monitoring whether the output current of the charging equipment at the same moment is larger than the consumption current of the system or not in real time;
if so, the electric quantity balance of the series rechargeable batteries is continued;
otherwise, the VPH is adjusted to the battery voltage Vbat 150mV, the Q1_ EN pin is pulled down to control the MOS transistor Q1 to turn off, the Q2_ EN pin is pulled up to control the MOS transistor Q2 to turn on, the Q3_ EN pin is pulled down to control the MOS transistor Q3 to turn off, and the step S201 is executed after a preset time interval.
In the method for charging the series-connected batteries, the equalizing circuit is arranged between the first rechargeable battery and the second rechargeable battery which are connected in series, before charging, the equalizing circuit is controlled to be connected with the electric quantity equalizing circuit, so that a loop is formed between the first rechargeable battery and the second rechargeable battery to equalize the electric quantity, and charging is performed after the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery are equalized, so that the service life of the rechargeable battery is prolonged, and the use safety of the rechargeable battery is improved.
On the basis of the foregoing embodiments, a second embodiment of the present invention provides a mobile terminal, please refer to fig. 4, which includes a charge management controller 401, an equalizing circuit controller 402, an equalizing current monitor 403, a first rechargeable battery Bat1 and a second rechargeable battery Bat2 connected in series with the charge management controller 401, and an equalizing circuit 406 disposed between the first rechargeable battery Bat1 and the second rechargeable battery Bat 2:
the charging management controller 401 is in communication connection with the equalization circuit controller 402, and is configured to determine whether an output current of the charging device meets a charging condition when the charging device is detected to be inserted;
the equalizing circuit controller 402 is configured to control an equalizing circuit provided between the first rechargeable battery Bat1 and the second rechargeable battery Bat2 to switch on an electric quantity equalizing loop when the determination result of the charging management controller 401 is yes, so that a loop is formed between the first rechargeable battery and the second rechargeable battery to perform electric quantity equalization;
the equalizing current monitor 403403 is communicatively connected to the equalizing circuit controller 402 for monitoring whether the electric quantity of the first rechargeable battery Bat1 and the electric quantity of the second rechargeable battery Bat2 reach equalization;
the equalizing circuit controller 402 is further configured to control the equalizing circuit 406 to open the charge equalizing loop when the charge of the first rechargeable battery Bat1 and the charge of the second rechargeable battery 403 reach equalization;
the charge management controller 401 is further configured to control the first rechargeable battery and the second rechargeable battery to start charging when the charge balancing circuit 406 is disconnected.
In one possible solution, the equalizing circuit 406 includes a first MOS transistor Q1, a second MOS transistor Q2 and a third MOS transistor Q3, a drain of the first MOS transistor Q1 is electrically connected to the positive electrode of the second rechargeable battery Bat1, a source is electrically connected to the positive electrode of the second rechargeable battery Bat1 and a source of the second MOS transistor Q2, a gate is electrically connected to the Q1_ EN pin of the equalizing circuit controller 402, a drain of the second MOS transistor Q2 is electrically connected to the negative electrode of the second rechargeable battery Bat1 and the drain of the MOS transistor Q3, a gate is electrically connected to the Q2_ EN pin of the equalizing circuit controller 402, a source of the MOS transistor Q3 is electrically connected to the negative electrode of the second rechargeable battery Bat2, and a gate is electrically connected to the Q3_ EN pin of the equalizing circuit 406;
the equalizing circuit 406 is configured to control the first MOS transistor Q1 and the third MOS transistor Q3 to be turned on, and the second MOS transistor Q2 to be turned off to control the equalizing circuit 406 to be turned on, so that a current equalizing loop is formed between the second rechargeable battery Bat1 and the second rechargeable battery Bat2 for power equalization.
In a possible implementation, the equalizing circuit 406 is further configured to turn off the equalizing circuit 406 by controlling the first MOS transistor Q1 and the third MOS transistor Q3 to be turned off and the second MOS transistor Q2 to be turned on.
In one possible solution, the charging management controller 401 is further configured to perform the following steps:
when detecting that the charging equipment is inserted, monitoring whether the output current of the charging equipment is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
In one possible solution, the charging management controller 401 is further configured to perform the following steps:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
In practical applications, if I _ vbus _ min is greater than I _ sys _ max, the charging management controller 401 is further configured to adjust the power supply voltage VPH of the system to be higher than the battery voltage.
If I _ vbus _ min is greater than I _ sys _ max, the charge management controller 401 is further configured to adjust the VPH to be lower than the battery voltage;
the equalizing circuit controller 402 is further configured to control the equalizing circuit 406 to disconnect the charge equalizing loop, so that the first rechargeable battery and the second rechargeable battery Bat2 supply power to the system together with the charging device;
the battery voltage is the voltage of the second rechargeable battery Bat1 and the second rechargeable battery Bat 2.
In a possible scheme, the drain of the first MOS transistor Q1 is connected to the positive electrode of the second rechargeable battery Bat1 through a sampling resistor R1, and two ends of the R1 are also electrically connected to the equalizing current monitor 403:
the balanced current monitor 403 is further configured to perform the following steps:
the monitoring whether the electric quantity of the second rechargeable battery Bat1 and the electric quantity of the second rechargeable battery Bat2 reach equilibrium includes:
measuring the equalizing current of the sampling circuit for multiple times and calculating the average value of the equalizing current measured for multiple times;
judging whether the average value is within a preset numerical range;
if yes, the electric quantity of the second rechargeable battery Bat1 is determined to be balanced with the electric quantity of the second rechargeable battery Bat 2.
In a feasible scheme, in the process of electric quantity equalization, the charging management controller is further used for monitoring whether the output current of the charging equipment at the same moment is larger than the consumed current of the system in real time, reducing the voltage VPH to the battery voltage Vbat 150mV when the judgment result is yes, and continuously monitoring whether the output current of the charging equipment meets the charging condition after a preset time interval when the judgment result is no;
and the equalizing circuit controller is also used for pulling the pin Q1_ EN low to control the MOS transistor Q1 to be turned off, pulling the pin Q2_ EN high to control the MOS transistor Q2 to be turned on, and pulling the pin Q3_ EN low to control the MOS transistor Q3 to be turned off when the judgment result is yes.
The mobile terminal of this embodiment sets up equalizer circuit between the first rechargeable battery and the second rechargeable battery of establishing ties, and before charging, control equalizer circuit switches on electric quantity equalizer circuit, makes to form the return circuit between this first rechargeable battery and this second rechargeable battery and carry out the electric quantity equilibrium, just charges after the electric quantity of first rechargeable battery and second rechargeable battery is balanced, has promoted rechargeable battery life and safe in utilization.
On the basis of the foregoing embodiment, another method for charging a series battery is provided in the third embodiment of the present invention. Referring to fig. 5, the method flow includes:
s501, the charging management controller detects that the charging device is inserted.
S502, the charging management controller obtains a plurality of measurement results of the output current I _ vbus of the charging equipment and a plurality of measurement results of the consumption current I _ sys of the system of the mobile terminal in real time.
Specifically, I _ vbus can be measured once per second, and the measurement results are I _ vbus1, I _ vbus2, I _ vbus3, I _ vbus4 and I _ vbus5 respectively after five times of measurement.
Meanwhile, I _ sys is measured once every second, and the measurement results are I _ sys 1, I _ sys 2, I _ sys 3, I _ sys 4, and I _ sys 5, respectively, five times.
S503, the management charging module respectively obtains the minimum value I _ vbus _ min of the output current I _ vbus of the charging equipment and the maximum value of the consumption current I _ sys from the plurality of measurement results.
In this embodiment, I _ vbus _ min ═ min (I _ vbus1 … I _ vbus 5); i _ sys _ max ═ max (I _ vbus1 … I _ vbus 5).
And S504, judging whether the difference between the I _ vbus _ min and the I _ sys _ max is larger than a preset value or not, if so, executing the step S505, otherwise, after the interval of 10S, continuing to execute the step S502.
In this step, the preset value is set to 50mA, i.e. I _ vbus _ min-I _ sys _ max is more than or equal to 50 mA.
And S505, the charging management controller adjusts Vph to be 200mV higher than the battery voltage Vbat, and sends a battery electric quantity balancing instruction 1 to the balancing circuit controller for electric quantity balancing.
S506, the equalizing circuit controller pulls the Q1_ EN pin high to control the MOS tube Q1 to be conducted, pulls the Q2_ EN pin low to control the MOS tube Q2 to be disconnected, and pulls the Q3_ EN pin high to control the MOS tube Q3 to be conducted.
In practical application, in the process of electric quantity equalization, whether the equalization current and the output current of the charging equipment meet the charging condition or not can be monitored simultaneously.
Referring to fig. 6, the monitoring of the equalizing current includes:
s601, the balancing circuit controller sends a balancing current acquisition instruction 2 to the balancing current monitor.
And S602, enabling the balance current monitor to start a current acquisition function to acquire balance current I _ balance, and acquiring multiple acquisition results.
In practical application, the measurement may be performed once every second, five times, and the measurement results are I _ balance 1, I _ balance 2, I _ balance 3, I _ balance 4, and I _ balance 5.
S603, the balance current monitor obtains an average value I _ balance _ avg of multiple acquisition results.
In this step, I _ balance _ avg ═ I _ vbus1+ … + I _ vbus 5)/5.
S604, the balance current monitor judges whether the I _ balance _ avg meets the condition that-1 mA is less than I _ balance _ avg and less than 1mA, if so, the step S605 is executed, otherwise, the step S602 is continuously executed after the interval of 15S.
And S605, the balance current monitor sends a battery electric quantity balance ending instruction 3 to the balance circuit controller.
And S606, the equalizing circuit controller pulls the Q1_ EN pin down to control the MOS transistor Q1 to be turned off, pulls the Q2_ EN pin up to control the MOS transistor Q2 to be turned on, and pulls the Q3_ EN pin down to control the MOS transistor Q3 to be turned off.
And S607, the equalizing circuit controller sends a charging command 4 to the charging management controller.
And S608, enabling the charging function after the charging management controller receives the charging instruction 4, and normally charging the series battery.
Please refer to fig. 7 for monitoring whether the output current of the charging device satisfies the charging condition.
S701, the charging management controller obtains the output current I _ vbus of the charger and the consumption current I _ sys of the system in real time.
S702, the charging management controller monitors whether the I _ vbus at the same moment is smaller than the I _ sys, if so, the step S703 is executed, otherwise, the step S701 is continuously executed.
In this step, if I _ vbu is greater than I _ sys, the equalization of the electric quantity of the series rechargeable batteries continues.
And S703, the charging management controller reduces VPH to the battery voltage Vbat 150mV and sends a battery power supply command 4 to the equalizing circuit controller.
And S704, after receiving the battery power supply instruction 4, the equalizing circuit controller pulls the pin Q1_ EN low to control the MOS transistor Q1 to be turned off, pulls the pin Q2_ EN high to control the MOS transistor Q2 to be turned on, and pulls the pin Q3_ EN low to control the MOS transistor Q3 to be turned off.
S705, step S507 is continuously executed after interval 10S.
In the method for charging the series-connected batteries, the equalizing circuit is arranged between the first rechargeable battery and the second rechargeable battery which are connected in series, before charging, the equalizing circuit is controlled to be connected with the electric quantity equalizing circuit, so that a loop is formed between the first rechargeable battery and the second rechargeable battery to equalize the electric quantity, and charging is performed after the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery are equalized, so that the service life of the rechargeable battery is prolonged, and the use safety of the rechargeable battery is improved.
On the basis of the foregoing embodiments, a fourth embodiment of the present invention provides a computer-readable medium storing a series battery charging program, which, when executed by at least one processor, implements the steps of the series battery charging method according to the third embodiment.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.
The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solutions of the present invention may be embodied in the form of a software product, which is stored in a storage medium (such as ROM/RAM, magnetic disk, optical disk) and includes instructions for enabling a terminal (such as a mobile phone, a computer, a server, an air conditioner, or a network device) to execute the method according to the embodiments of the present invention.
While the present invention has been described with reference to the embodiments shown in the drawings, the present invention is not limited to the embodiments, which are illustrative and not restrictive, and it will be apparent to those skilled in the art that various changes and modifications can be made therein without departing from the spirit and scope of the invention as defined in the appended claims.
Claims (13)
1. A charging method for series batteries is suitable for a mobile terminal, and is characterized by comprising the following steps:
when the charging equipment is detected to be inserted, judging whether the output current of the charging equipment meets the charging condition;
if yes, controlling an equalizing circuit arranged between the first rechargeable battery and the second rechargeable battery to be connected with an electric quantity equalizing loop, and enabling the first rechargeable battery and the second rechargeable battery to form a loop for electric quantity equalization;
monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach balance or not;
if so, controlling the equalizing circuit to disconnect the electric quantity equalizing loop, so that the first rechargeable battery and the second rechargeable battery start to charge;
otherwise, monitoring whether the output current of the charging equipment at the same moment is larger than the consumption current of the system in real time, if so, continuing to perform electric quantity equalization of the serially connected rechargeable batteries, otherwise, adjusting the power supply voltage to the voltage of the rechargeable batteries, disconnecting the electric quantity equalization loop, enabling the first rechargeable battery, the second rechargeable battery and the charging equipment to jointly supply power to the system, and continuing to execute the step of judging whether the output current of the charging equipment meets the charging condition after a preset time interval.
2. The method for charging series-connected batteries according to claim 1, wherein the controlling an equalizing circuit provided between a first rechargeable battery and a second rechargeable battery to form a charge equalization loop between the first rechargeable battery and the second rechargeable battery for charge equalization comprises:
the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched on, and the second MOS transistor Q2 is controlled to be switched off;
the drain of the first MOS transistor Q1 is electrically connected to the anode of the first rechargeable battery, the source is electrically connected to the anode of the second rechargeable battery and the source of the second MOS transistor Q2, the gate is used for receiving a control signal, the drain of the second MOS transistor Q2 is electrically connected to the cathode of the first rechargeable battery and the drain of the MOS transistor Q3, the gate is used for receiving a control signal, the source of the MOS transistor Q3 is electrically connected to the cathode of the second rechargeable battery, and the gate is used for receiving a control signal.
3. The method for charging series connected batteries according to claim 2, wherein said controlling said equalization circuit to open said charge equalization loop comprises:
and the first MOS transistor Q1 and the third MOS transistor Q3 are controlled to be switched off, and the second MOS transistor Q2 is controlled to be switched on.
4. The method of charging series connected batteries according to claim 3, wherein said determining whether the output current of the charging device satisfies the charging condition further comprises:
when detecting that a charging device is inserted, monitoring whether the output current of the charging device is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
5. The method of charging series connected batteries according to claim 4, wherein said monitoring whether the output current of said charging device is greater than the consumption current of the system comprises:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
6. The series battery charging method of claim 4, wherein the drain of the first MOS transistor Q1 is connected to the anode of the first rechargeable battery through a sampling resistor R1, and both ends of the R1 are further electrically connected to an equalizing current monitor:
the monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equilibrium includes:
measuring the equalizing current of the sampling resistor R1 for multiple times and calculating the average value of the equalizing current of the multiple measurements;
judging whether the average value is within a preset numerical range;
and if so, determining that the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery.
7. The utility model provides a mobile terminal, its characterized in that, mobile terminal includes charge management controller, equalizer circuit controller, equalizing current monitor, with first rechargeable battery and the second rechargeable battery that charge management controller establishes ties and locate first rechargeable battery reaches the electric quantity equalizer circuit between the second rechargeable battery:
the charging management controller is in communication connection with the equalizing circuit controller and is used for judging whether the output current of the charging equipment meets the charging condition or not when the charging equipment is detected to be inserted;
the equalization circuit controller is used for controlling an electric quantity equalization circuit arranged between the first rechargeable battery and the second rechargeable battery to be connected with an electric quantity equalization loop when the judgment result of the charge management controller is yes, so that the loop is formed between the first rechargeable battery and the second rechargeable battery for electric quantity equalization;
the equalizing current monitor is in communication connection with the equalizing circuit controller and is used for monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equalization;
the equalization circuit controller is further used for controlling the equalization circuit to disconnect the electric quantity equalization loop when the electric quantity of the first rechargeable battery is equalized with the electric quantity of the second rechargeable battery;
the charge management controller is further configured to control the first rechargeable battery and the second rechargeable battery to start charging when the electric quantity balancing circuit is disconnected;
in the process of electric quantity equalization, the charging management controller is further used for monitoring whether the output current of the charging equipment at the same moment is larger than the consumed current of a system or not in real time, and regulating the power supply voltage to the voltage of a charging battery when the judgment result is yes, so that the first charging battery, the second charging battery and the charging equipment jointly supply power to the system, and when the judgment result is no, continuously monitoring whether the output current of the charging equipment meets the charging condition or not after a preset time interval;
and the equalizing circuit controller is also used for controlling the electric quantity equalizing circuit to be disconnected when the judgment result is yes.
8. The mobile terminal as claimed in claim 7, wherein the equalization circuit includes a first MOS transistor Q1, a second MOS transistor Q2 and a third MOS transistor Q3, the drain of the first MOS transistor Q1 is electrically connected to the positive electrode of the first rechargeable battery, the source is electrically connected to the positive electrode of the second rechargeable battery and the source of the second MOS transistor Q2, the gate is electrically connected to the Q1_ EN pin of the equalization circuit controller, the drain of the second MOS transistor Q2 is electrically connected to the negative electrode of the first rechargeable battery and the drain of the MOS transistor Q3, the gate is electrically connected to the Q2_ EN pin of the equalization circuit controller, the source of the MOS transistor Q3 is electrically connected to the negative electrode of the second rechargeable battery, and the gate is electrically connected to the Q3_ EN pin of the equalization circuit controller;
the equalizing circuit is used for controlling the first MOS tube Q1 and the third MOS tube Q3 to be conducted, and the second MOS tube Q2 to be turned off to control the equalizing circuit to be conducted, so that a current equalizing loop is formed between the first rechargeable battery and the second rechargeable battery to perform electric quantity equalization.
9. The mobile terminal of claim 8, wherein the equalization circuit is further configured to turn off the equalization circuit by controlling the first MOS transistor Q1 and the third MOS transistor Q3 to be turned off and the second MOS transistor Q2 to be turned on.
10. The mobile terminal of claim 9, wherein the charging management controller is further configured to perform the steps of:
when detecting that a charging device is inserted, monitoring whether the output current of the charging device is larger than the consumption current of a system;
and if so, determining that the output current meets the charging condition.
11. The mobile terminal of claim 10, wherein the charging management controller is further configured to perform the steps of:
measuring the output current and the consumption current of the charging equipment for multiple times;
acquiring a minimum value I _ vbus _ min of output current and a maximum value I _ sys _ max of consumption current;
and judging whether the I _ vbus _ min is larger than the I _ sys _ max or not, and when the I _ vbus _ min is smaller than the I _ sys _ max, continuing to perform the action of monitoring whether the output current of the charging equipment is larger than the consumption current of a system or not after a preset time interval.
12. The mobile terminal as claimed in claim 11, wherein the drain of the first MOS transistor Q1 is connected to the anode of the first rechargeable battery through a sampling resistor R1, and both ends of the R1 are further electrically connected to the equalizing current monitor:
the balance current monitor is further used for executing the following steps:
monitoring whether the electric quantity of the first rechargeable battery and the electric quantity of the second rechargeable battery reach equilibrium, including:
measuring the equalizing current of the sampling resistor R1 for multiple times and calculating the average value of the equalizing current of the multiple measurements;
judging whether the average value is within a preset numerical range;
and if so, determining that the electric quantity of the first rechargeable battery is balanced with the electric quantity of the second rechargeable battery.
13. A computer-readable medium, characterized in that it stores a series battery charging program which, when executed by at least one processor, implements the steps of the series battery charging method according to any one of claims 1 to 7.
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| EP3937292A4 (en) * | 2019-03-22 | 2022-03-09 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Charging and discharging control method and device to be charged |
| CN112448427A (en) * | 2019-08-30 | 2021-03-05 | Oppo广东移动通信有限公司 | Electronic device and charge-discharge control method |
| CN112448428A (en) * | 2019-08-30 | 2021-03-05 | Oppo广东移动通信有限公司 | Electronic device and charge-discharge control method |
| CN113224803B (en) * | 2020-01-21 | 2024-06-25 | 北京小米移动软件有限公司 | Charging control method, device and storage medium |
| CN111864843A (en) * | 2020-07-27 | 2020-10-30 | Oppo广东移动通信有限公司 | Double-battery charging device and mobile terminal |
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