CN107785961A - A kind of series-connected cell charging method, mobile terminal and computer-readable medium - Google Patents
A kind of series-connected cell charging method, mobile terminal and computer-readable medium Download PDFInfo
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- CN107785961A CN107785961A CN201711027707.1A CN201711027707A CN107785961A CN 107785961 A CN107785961 A CN 107785961A CN 201711027707 A CN201711027707 A CN 201711027707A CN 107785961 A CN107785961 A CN 107785961A
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- rechargeable battery
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- equalizing circuit
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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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- Charge And Discharge Circuits For Batteries Or The Like (AREA)
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Abstract
The invention discloses a kind of series-connected cell charging method, mobile terminal and computer-readable medium, methods described includes：When detecting charging equipment insertion, judge whether the output current of charging equipment meets charge condition；If so, control connects electric quantity balancing loop located at the equalizing circuit between the first rechargeable battery and the second rechargeable battery, make to form progress electric quantity balancing in loop between first rechargeable battery and second rechargeable battery；Whether the electricity for monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery；If so, controlling the equalizing circuit to disconnect the electric quantity balancing loop, first rechargeable battery is set to be started to charge up with second rechargeable battery.Using the present invention, equalizing circuit is set between the first rechargeable battery and the second rechargeable battery of series connection, just charged after the first rechargeable battery with the electric quantity balancing of the second rechargeable battery, improve rechargeable battery service life and safe to use.
Description
Technical field
The present invention relates to charging and cell art, more particularly to a kind of series-connected cell charging method, mobile terminal
And computer-readable medium.
Background technology
With the development of science and technology, cell phone already turns into the center of personal information, flat board then meets that everybody is slight upper
The entertainment requirements such as net, game, video, PC are then to undertake office responsibility.Although single product is functionally stronger and stronger,
Modal boundary is increasingly fuzzyyer.Digital product increasingly displaying, rather than functionalization, large and complete product is by pole
Degree demand.But the power consumption of larger-size mobile terminal (such as flat board) is higher, to meet market usage time demand, battery holds
Amount is general all in more than 35wh, and common batteries capacity is generally 18Wh or so, so just needing two batteries in series or in parallel
Use.
When using series-connected cell scheme, double battery cores that producer can strictly select two battery core specification performances consistent compose in parallel
Series-connected cell, but with the growth of usage time, two series-connected cells occur electricity differentiation, and series-connected cell charging side
In case, two battery charges are just the same, if do not calibrated to two series-connected cell electric quantity balancings, two battery electric quantity differences can be got over
Come it is more serious, if two series-connected cell electricity differ greatly occur charging it is abnormal (a such as battery over charge and other one
Individual battery does not have fully charged), it will bring charging potential safety hazard.
Therefore, it is necessary to a kind of series-connected cell charging method, mobile terminal and computer-readable medium are provided, it is existing to solve
There is technology mobile terminal the problem of potential safety hazard in charging process to be present when using series-connected cell scheme.
The content of the invention
In view of this, can it is an object of the invention to provide a kind of series-connected cell charging method, mobile terminal and computer
Medium is read, to solve asking for potential safety hazard in charging process to be present when prior art mobile terminal uses series-connected cell scheme
Topic.
Technical scheme is as follows used by the present invention solves above-mentioned technical problem：
According to the first aspect of the invention, there is provided a kind of series-connected cell charging method, the series-connected cell charging method
Comprise the following steps：
When detecting charging equipment insertion, judge whether the output current of charging equipment meets charge condition；
Returned if so, control connects electric quantity balancing located at the equalizing circuit between the first rechargeable battery and the second rechargeable battery
Road, make to form progress electric quantity balancing in loop between first rechargeable battery and second rechargeable battery；
Whether the electricity for monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery；
If so, control the equalizing circuit to disconnect the electric quantity balancing loop, make first rechargeable battery and described the
Two rechargeable batteries start to charge up.
Preferably, the control is located at equalizing circuit between the first rechargeable battery and the second rechargeable battery, makes described the
Electric quantity balancing loop is formed between one rechargeable battery and second rechargeable battery and carries out electric quantity balancing, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to turn on, the second metal-oxide-semiconductor Q2 shut-offs；
Wherein, the drain electrode of the first metal-oxide-semiconductor Q1 electrically connects with the positive pole of first rechargeable battery, source electrode and described the
The positive pole of two rechargable batteries and the second metal-oxide-semiconductor Q2 source electrode electrically connect, and grid is used to receive control signal, and described second
Metal-oxide-semiconductor Q2 drain electrode electrically connects with the drain electrode of the negative pole and the metal-oxide-semiconductor Q3 of first rechargeable battery, and grid is used to receive
Control signal, the source electrode of the metal-oxide-semiconductor Q3 electrically connect with the negative pole of second rechargeable battery, and grid is used to receive control letter
Number.
Preferably, the control equalizing circuit disconnects the electric quantity balancing loop, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to disconnect, the second metal-oxide-semiconductor Q2 conductings.
Preferably, whether the output current for judging charging equipment meets charge condition, in addition to：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electricity of system
Stream；
If so, determine that the output current meets charge condition.
Preferably, whether the output current of the monitoring charging equipment is more than the consumption electric current of system, including：
Output current and the consumption electric current to the charging equipment take multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_ in the I_vbus_min
During sys_max, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than system
Consumption electric current action.
Preferably, sampling resistor is passed through between the drain electrode of the first metal-oxide-semiconductor Q1 and the positive pole of first rechargeable battery
R1 connections, the both ends of the R1 also electrically connect with euqalizing current monitor：
Whether the electricity of monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery, wraps
Include：
The euqalizing current of the sample circuit is taken multiple measurements and calculates the flat of the euqalizing current repeatedly measured
Average；
Judge the average value whether in default number range；
If so, determine that the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery.
According to the second aspect of the invention, there is provided a kind of mobile terminal, the mobile terminal control including Charge Management
Device, equalizing circuit controller, euqalizing current monitor, the first rechargeable battery and second connected with the Charge Management controller
Rechargeable battery and the electric quantity balancing circuit between first rechargeable battery and second rechargeable battery：
The Charge Management controller is connected with the equalizing circuit controller communication, for detecting that charging equipment inserts
It is fashionable, judge whether the output current of charging equipment meets charge condition；
The equalizing circuit controller, for the Charge Management controller judged result to be that time control is set up in the
Electric quantity balancing circuit between one rechargeable battery and the second rechargeable battery connects electric quantity balancing loop, makes first rechargeable battery
Loop is formed between second rechargeable battery and carries out electric quantity balancing；
The euqalizing current monitor is connected with the equalizing circuit controller communication, for monitoring the first charging electricity
Whether the electricity in pond reaches balanced with the electricity of second rechargeable battery；
The equalizing circuit controller, it is additionally operable to the electricity in first rechargeable battery and second rechargeable battery
When electricity reaches equilibrium, the equalizing circuit is controlled to disconnect the electric quantity balancing loop；
The Charge Management controller, when being additionally operable to disconnect in the electric quantity balancing loop, control the first charging electricity
Pond starts to charge up with second rechargeable battery.
Preferably, the equalizing circuit includes the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3, and described first
Metal-oxide-semiconductor Q1 drain electrode electrically connects with the positive pole of first rechargeable battery, positive pole and institute of the source electrode with second rechargable battery
The second metal-oxide-semiconductor Q2 source electrode electrical connection is stated, grid electrically connects with the Q1_EN pins of the equalizing circuit controller, and described second
Metal-oxide-semiconductor Q2 drain electrode electrically connects with the drain electrode of the negative pole and the metal-oxide-semiconductor Q3 of first rechargeable battery, grid with it is described
The Q2_EN pins electrical connection of weighing apparatus circuit controller, the negative pole of the source electrode of the metal-oxide-semiconductor Q3 and second rechargeable battery are electrically connected
Connect, grid electrically connects with the Q3_EN pins of the equalizing circuit；
The equalizing circuit, for by controlling the first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 conductings, the second metal-oxide-semiconductor Q2
Shut-off controls the equalizing circuit to connect, and makes to form current balance between first rechargeable battery and second rechargeable battery
Loop carries out electric quantity balancing.
Preferably, the equalizing circuit, is additionally operable to by controlling the first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 to disconnect, described the
Two metal-oxide-semiconductor Q2 conductings disconnect the equalizing circuit.
Preferably, the Charge Management controller, it is additionally operable to perform following steps：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electricity of system
Stream；
If so, determine that the output current meets charge condition.
Preferably, the Charge Management controller, it is additionally operable to perform following steps：
Output current and the consumption electric current to the charging equipment take multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_ in the I_vbus_min
During sys_max, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than system
Consumption electric current action.
Preferably, sampling resistor is passed through between the drain electrode of the first metal-oxide-semiconductor Q1 and the positive pole of first rechargeable battery
R1 connections, the both ends of the R1 also electrically connect with the euqalizing current monitor：
The euqalizing current monitor, it is additionally operable to perform following steps：
Whether the electricity for monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery, bag
Include：
The euqalizing current of the sample circuit is taken multiple measurements and calculates the flat of the euqalizing current repeatedly measured
Average；
Judge the average value whether in default number range；
If so, determine that the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery.
According to the third aspect of the present invention, there is provided a kind of computer-readable medium, the computer-readable medium storage
There is series-connected cell charging procedure, when the series-connected cell charging procedure is by least one computing device, realize such as first party
The step of image processing method described in face.
The series-connected cell charging method, mobile terminal and computer-readable medium of the present embodiment of the embodiment of the present invention,
Equalizing circuit is set between the first rechargeable battery and the second rechargeable battery of series connection, before charging, control equalizing circuit connects electricity
Balanced loop is measured, makes to form progress electric quantity balancing in loop between first rechargeable battery and second rechargeable battery,
Just charged after the electric quantity balancing of first rechargeable battery and the second rechargeable battery, improve rechargeable battery service life and
It is safe to use.
Brief description of the drawings
Fig. 1 is a kind of hardware architecture diagram for the mobile terminal for realizing each embodiment of the present invention；
Fig. 2 is a kind of flow chart for series-connected cell charging method that the embodiment of the present invention one provides；
Fig. 3 is the equalizing circuit schematic diagram in the embodiment of the present invention one；
Fig. 4 is a kind of mobile terminal structure schematic diagram that the embodiment of the present invention two provides；
Fig. 5, Fig. 6 and Fig. 7 are the flow chart for another series-connected cell charging method that inventive embodiments three provide.
The realization, functional characteristics and advantage of the object of the invention will be described further referring to the drawings in conjunction with the embodiments.
Embodiment
It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, it is not intended to limit the present invention.
In follow-up description, the suffix using such as " module ", " part " or " unit " for representing element is only
Be advantageous to the explanation of the present invention, itself there is no a specific meaning.Therefore, " module ", " part " or " unit " can mix
Ground uses.
Terminal can be implemented in a variety of manners.For example, the terminal described in the present invention can include such as mobile phone, flat board
Computer, notebook computer, palm PC, personal digital assistant (Personal Digital Assistant, PDA), portable
Media player (Portable Media Player, PMP), guider, wearable device, Intelligent bracelet, pedometer etc. move
Dynamic terminal, and the fixed terminal such as digital TV, desktop computer.
It will be illustrated in subsequent descriptions by taking mobile terminal as an example, it will be appreciated by those skilled in the art that except special
Outside element for moving purpose, construction according to the embodiment of the present invention can also apply to the terminal of fixed type.
Referring to Fig. 1, its hardware architecture diagram for a kind of mobile terminal of each embodiment of the realization present invention, the shifting
Dynamic terminal 100 can include：RF (Radio Frequency, radio frequency) unit 101, WiFi module 102, audio output unit
103rd, A/V (audio/video) input block 104, sensor 105, display unit 106, user input unit 107, interface unit
108th, the part such as memory 109, processor 110 and power supply 111.It will be understood by those skilled in the art that shown in Fig. 1
Mobile terminal structure does not form the restriction to mobile terminal, and mobile terminal can be included than illustrating more or less parts,
Either combine some parts or different parts arrangement.
The all parts of mobile terminal are specifically introduced with reference to Fig. 1：
Radio frequency unit 101 can be used for receiving and sending messages or communication process in, the reception and transmission of signal, specifically, by base station
Downlink information receive after, handled to processor 110；In addition, up data are sent to base station.Generally, radio frequency unit 101
Including but not limited to antenna, at least one amplifier, transceiver, coupler, low-noise amplifier, duplexer etc..In addition, penetrate
Frequency unit 101 can also be communicated by radio communication with network and other equipment.Above-mentioned radio communication can use any communication
Standard or agreement, including but not limited to GSM (Global System of Mobile communication, global system for mobile telecommunications
System), GPRS (General Packet Radio Service, general packet radio service), CDMA2000 (Code
Division Multiple Access 2000, CDMA 2000), WCDMA (Wideband Code Division
Multiple Access, WCDMA), TD-SCDMA (Time Division-Synchronous Code
Division Multiple Access, TD SDMA), FDD-LTE (Frequency Division
Duplexing-Long Term Evolution, FDD Long Term Evolution) and TDD-LTE (Time Division
Duplexing-Long Term Evolution, time division duplex Long Term Evolution) etc..
WiFi belongs to short range wireless transmission technology, and mobile terminal can help user to receive and dispatch electricity by WiFi module 102
Sub- mail, browse webpage and access streaming video etc., it has provided the user wireless broadband internet and accessed.Although Fig. 1 shows
Go out WiFi module 102, but it is understood that, it is simultaneously not belonging to must be configured into for mobile terminal, completely can be according to need
To be omitted in the essential scope for do not change invention.
Audio output unit 103 can be in call signal reception pattern, call mode, record mould in mobile terminal 100
When under the isotypes such as formula, speech recognition mode, broadcast reception mode, by radio frequency unit 101 or WiFi module 102 it is receiving or
It is sound that the voice data stored in memory 109, which is converted into audio signal and exported,.Moreover, audio output unit 103
The audio output related to the specific function that mobile terminal 100 performs can also be provided (for example, call signal receives sound, disappeared
Breath receives sound etc.).Audio output unit 103 can include loudspeaker, buzzer etc..
A/V input blocks 104 are used to receive audio or video signal.A/V input blocks 104 can include graphics processor
(Graphics Processing Unit, GPU) 1041 and microphone 1042, graphics processor 1041 is in video acquisition mode
Or the static images or the view data of video obtained in image capture mode by image capture apparatus (such as camera) are carried out
Reason.Picture frame after processing may be displayed on display unit 106.Picture frame after the processing of graphics processor 1041 can be deposited
Storage is transmitted in memory 109 (or other storage mediums) or via radio frequency unit 101 or WiFi module 102.Mike
Wind 1042 can connect in telephone calling model, logging mode, speech recognition mode etc. operational mode via microphone 1042
Quiet down sound (voice data), and can be voice data by such acoustic processing.Audio (voice) data after processing can
To be converted to the form output that mobile communication base station can be sent to via radio frequency unit 101 in the case of telephone calling model.
Microphone 1042 can implement various types of noises and eliminate (or suppression) algorithm to eliminate (or suppression) in reception and send sound
Caused noise or interference during frequency signal.
Mobile terminal 100 also includes at least one sensor 105, such as optical sensor, motion sensor and other biographies
Sensor.Specifically, optical sensor includes ambient light sensor and proximity transducer, wherein, ambient light sensor can be according to environment
The light and shade of light adjusts the brightness of display panel 1061, and proximity transducer can close when mobile terminal 100 is moved in one's ear
Display panel 1061 and/or backlight.As one kind of motion sensor, accelerometer sensor can detect in all directions (general
For three axles) size of acceleration, size and the direction of gravity are can detect that when static, the application available for identification mobile phone posture
(such as horizontal/vertical screen switching, dependent game, magnetometer pose calibrating), Vibration identification correlation function (such as pedometer, percussion) etc.；
The fingerprint sensor that can also configure as mobile phone, pressure sensor, iris sensor, molecule sensor, gyroscope, barometer,
The other sensors such as hygrometer, thermometer, infrared ray sensor, will not be repeated here.
Display unit 106 is used for the information for showing the information inputted by user or being supplied to user.Display unit 106 can wrap
Display panel 1061 is included, liquid crystal display (Liquid Crystal Display, LCD), Organic Light Emitting Diode can be used
Forms such as (Organic Light-Emitting Diode, OLED) configures display panel 1061.
User input unit 107 can be used for the numeral or character information for receiving input, and produce the use with mobile terminal
The key signals input that family is set and function control is relevant.Specifically, user input unit 107 may include contact panel 1071 with
And other input equipments 1072.Contact panel 1071, also referred to as touch-screen, collect touch operation of the user on or near it
(for example user uses any suitable objects or annex such as finger, stylus on contact panel 1071 or in contact panel 1071
Neighbouring operation), and corresponding attachment means are driven according to formula set in advance.Contact panel 1071 may include touch detection
Two parts of device and touch controller.Wherein, the touch orientation of touch detecting apparatus detection user, and detect touch operation band
The signal come, transmits a signal to touch controller；Touch controller receives touch information from touch detecting apparatus, and by it
Contact coordinate is converted into, then gives processor 110, and the order sent of reception processing device 110 and can be performed.In addition, can
To realize contact panel 1071 using polytypes such as resistance-type, condenser type, infrared ray and surface acoustic waves.Except contact panel
1071, user input unit 107 can also include other input equipments 1072.Specifically, other input equipments 1072 can wrap
Include but be not limited to physical keyboard, in function key (such as volume control button, switch key etc.), trace ball, mouse, action bars etc.
One or more, do not limit herein specifically.
Further, contact panel 1071 can cover display panel 1061, detect thereon when contact panel 1071 or
After neighbouring touch operation, processor 110 is sent to determine the type of touch event, is followed by subsequent processing device 110 according to touch thing
The type of part provides corresponding visual output on display panel 1061.Although in Fig. 1, contact panel 1071 and display panel
1061 be the part independent as two to realize the input of mobile terminal and output function, but in certain embodiments, can
Input and the output function of mobile terminal are realized so that contact panel 1071 and display panel 1061 is integrated, is not done herein specifically
Limit.
Interface unit 108 is connected the interface that can pass through as at least one external device (ED) with mobile terminal 100.For example,
External device (ED) can include wired or wireless head-band earphone port, external power source (or battery charging equipment) port, You Xianhuo
Wireless data communications port, memory card port, the port for connecting the device with identification module, audio input/output (I/O) end
Mouth, video i/o port, ear port etc..Interface unit 108 can be used for receiving the input from external device (ED) (for example, number
It is believed that breath, electric power etc.) and the input received is transferred to one or more elements in mobile terminal 100 or can be with
For transmitting data between mobile terminal 100 and external device (ED).
Memory 109 can be used for storage software program and various data.Memory 109 can mainly include storing program area
And storage data field, wherein, storing program area can storage program area, application program (such as the sound needed at least one function
Sound playing function, image player function etc.) etc.；Storage data field can store according to mobile phone use created data (such as
Voice data, phone directory etc.) etc..In addition, memory 109 can include high-speed random access memory, can also include non-easy
The property lost memory, a for example, at least disk memory, flush memory device or other volatile solid-state parts.
Processor 110 is the control centre of mobile terminal, utilizes each of various interfaces and the whole mobile terminal of connection
Individual part, by running or performing the software program and/or module that are stored in memory 109, and call and be stored in storage
Data in device 109, the various functions and processing data of mobile terminal are performed, so as to carry out integral monitoring to mobile terminal.Place
Reason device 110 may include one or more processing units；Preferably, processor 110 can integrate application processor and modulatedemodulate is mediated
Device is managed, wherein, application processor mainly handles operating system, user interface and application program etc., and modem processor is main
Handle radio communication.It is understood that above-mentioned modem processor can not also be integrated into processor 110.
Mobile terminal 100 can also include the power supply 111 (such as battery) to all parts power supply, it is preferred that power supply 111
Can be logically contiguous by power-supply management system and processor 110, so as to realize management charging by power-supply management system, put
The function such as electricity and power managed.
Although Fig. 1 is not shown, mobile terminal 100 can also will not be repeated here including bluetooth module etc..
For the ease of understanding the embodiment of the present invention, the communications network system being based on below to the mobile terminal of the present invention enters
Row description.
Based on above-mentioned mobile terminal hardware configuration, each embodiment of the inventive method is proposed.
The embodiment of the present invention one provides a kind of series-connected cell charging method, referring to Fig. 2, the series-connected cell charging method
Comprise the following steps：
S201, when detect charging equipment insertion when, whether the output current for monitoring the charging equipment meets charge condition；
If so, performing step S202, step S205 is otherwise performed；
S202, control are connected located at the equalizing circuit between the first rechargeable battery and the second rechargeable battery, this first is filled
Current balance loop is formed between battery and second rechargeable battery and carries out electric quantity balancing；
Whether S203, the electricity for monitoring first rechargeable battery reach balanced with the electricity of second rechargeable battery, and/or
Whether the output current for monitoring synchronization charging equipment is less than the consumption electric current of system；
If the electricity of the electricity of S204, first rechargeable battery and second rechargeable battery reaches balance, the equilibrium is controlled
Circuit disconnects the electric quantity balancing loop, first rechargeable battery is started to charge up with second rechargeable battery；
S205, first rechargable battery and second rechargeable battery and the charging equipment is controlled to be system power supply jointly.
In a feasible scheme, referring to Fig. 3, drain electrode of the equalizing circuit provided with the first metal-oxide-semiconductor Q1 first is filled with this
The positive pole electrical connection of battery, source electrode electrically connect with the positive pole of second rechargable battery and second metal-oxide-semiconductor Q2 source electrode, grid
For receiving control signal, second metal-oxide-semiconductor Q2 drain electrode and the drain electrode of the negative pole and metal-oxide-semiconductor Q3 of first rechargeable battery
Electrical connection, grid are used to receive control signal, and metal-oxide-semiconductor Q3 source electrode electrically connects with the negative pole of second rechargeable battery, grid
For receiving control signal.
Now, step S202, control located at equalizing circuit between the first rechargeable battery and the second rechargeable battery, make this
Electric quantity balancing loop is formed between one rechargeable battery and second rechargeable battery and carries out electric quantity balancing, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to turn on, second metal-oxide-semiconductor Q2 shut-offs.
Step S204, the equalizing circuit is controlled to disconnect the electric quantity balancing loop, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to disconnect, second metal-oxide-semiconductor Q2 conductings.
In a feasible scheme, this judges whether the output current of charging equipment meets charge condition, in addition to：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electricity of system
Stream；
If so, determine that the output current meets charge condition.
In practical application, whether the output current of the monitoring charging equipment is more than the consumption electric current of system, including：
The output current of the charging equipment and the consumption electric current are taken multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_sys_max in the I_vbus_min
When, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than the consumption electric current of system
Action.
In practical application, if the I_vbus_min is more than the I_sys_max, before performing step S202, this method is also wrapped
Include：The supply voltage VPH of adjustment system is extremely higher than cell voltage；
If the I_vbus_min is less than the I_sys_max, this method also includes：
The VPH is adjusted to being less than the cell voltage, and controls the equalizing circuit to disconnect the electric quantity balancing loop, make this first
Rechargable battery and second rechargeable battery and the charging equipment are the system power supply jointly；
The cell voltage is first rechargeable battery and the voltage of second rechargeable battery.
In a feasible scheme, please continue to refer to Fig. 3, first metal-oxide-semiconductor Q1 drain electrode and first rechargeable battery
Positive pole between connected by sampling resistor R1, the both ends of the R1 also electrically connect with euqalizing current monitor.
Step S203, monitor whether the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery,
Including：
The average value of the euqalizing current repeatedly measured is taken multiple measurements and calculated to the euqalizing current of the sample circuit；
Judge the average value whether in default number range；
If so, determine that the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery.
In a feasible scheme, during electric quantity balancing, this method also includes：
Whether the output current of the charging equipment of monitoring synchronization is more than the consumption electric current of system in real time；
If so, the electric quantity balancing of serial connection charge battery continues；
Otherwise, VPH is turned down to cell voltage Vbat 150mV, Q1_EN pins is dragged down into the Q1 shut-offs of control metal-oxide-semiconductor, will
Q2_EN pins draw high the Q2 conductings of control metal-oxide-semiconductor, and Q3_EN pins are dragged down into the Q3 shut-offs of control metal-oxide-semiconductor, and between the default time
Every rear execution step S201.
The series-connected cell charging method of the present embodiment, set between the first rechargeable battery and the second rechargeable battery of series connection
Equalizing circuit, before charging, control equalizing circuit connect electric quantity balancing loop, make first rechargeable battery and second charging
Loop is formed between battery and carries out electric quantity balancing, is just carried out after the first rechargeable battery with the electric quantity balancing of the second rechargeable battery
Charging, improve rechargeable battery service life and safe to use.
On the basis of previous embodiment, the embodiment of the present invention two provides a kind of mobile terminal, referring to Fig. 4, the shifting
Dynamic terminal includes Charge Management controller 401, equalizing circuit controller 402, euqalizing current monitor 403 and the Charge Management
The first rechargeable battery Bat1 and the second rechargeable battery Bat2 that controller 401 is connected and located at the first rechargeable battery Bat1 and
Equalizing circuit 406 between second rechargeable battery Bat2：
The Charge Management controller 401 connects with the equalizing circuit controller 402 communication, for detecting charging equipment
During insertion, judge whether the output current of charging equipment meets charge condition；
The equalizing circuit controller 402, for the Charge Management controller 401 judged result for be time control set up in
Equalizing circuit between first rechargeable battery Bat1 and the second rechargeable battery Bat2 connects electric quantity balancing loop, makes first charging
Loop is formed between battery and second rechargeable battery and carries out electric quantity balancing；
The communication of the euqalizing current monitor 403403 and the equalizing circuit controller 402 connects, and first is filled for monitoring this
Whether battery Bat1 electricity reaches balanced with second rechargeable battery Bat2 electricity；
The equalizing circuit controller 402, it is additionally operable to electricity and second rechargeable battery in first rechargeable battery Bat1
When 403 electricity reaches equilibrium, the equalizing circuit 406 is controlled to disconnect the electric quantity balancing loop；
The Charge Management controller 401, when being additionally operable to disconnect in the electric quantity balancing loop 406, control the first charging electricity
Pond starts to charge up with second rechargeable battery.
In a feasible scheme, the equalizing circuit 406 includes the first metal-oxide-semiconductor Q1, the second metal-oxide-semiconductor Q2 and the 3rd MOS
Pipe Q3, first metal-oxide-semiconductor Q1 drain electrode electrically connect with second rechargeable battery Bat1 positive pole, source electrode and second rechargable battery
Positive pole and second metal-oxide-semiconductor Q2 source electrode electrically connect, and grid electrically connects with the Q1_EN pins of the equalizing circuit controller 402,
Second metal-oxide-semiconductor Q2 drain electrode electrically connects with the drain electrode of second rechargeable battery Bat1 negative pole and metal-oxide-semiconductor Q3, grid with
The Q2_EN pins electrical connection of the equalizing circuit controller 402, metal-oxide-semiconductor Q3 source electrode are negative with second rechargeable battery Bat2's
Pole electrically connects, and grid electrically connects with the Q3_EN pins of the equalizing circuit 406；
The equalizing circuit 406, for by controlling the first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 conductings, second metal-oxide-semiconductor Q2
Shut-off controls the equalizing circuit 406 to connect, and makes to form electricity between the second rechargeable battery Bat1 and second rechargeable battery Bat2
Flow balanced loop and carry out electric quantity balancing.
In a feasible scheme, the equalizing circuit 406, it is additionally operable to by controlling the first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor
Q3 disconnects, second metal-oxide-semiconductor Q2 conductings disconnect the equalizing circuit 406.
In a feasible scheme, the Charge Management controller 401, it is additionally operable to perform following steps：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electricity of system
Stream；
If so, determine that the output current meets charge condition.
In a feasible scheme, the Charge Management controller 401, it is additionally operable to perform following steps：
The output current of the charging equipment and the consumption electric current are taken multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_sys_max in the I_vbus_min
When, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than the consumption electric current of system
Action.
In practical application, if the I_vbus_min is more than the I_sys_max, Charge Management controller 401, it is additionally operable to adjust
The supply voltage VPH of system is extremely higher than cell voltage.
If the I_vbus_min is more than the I_sys_max, Charge Management controller 401, it is additionally operable to adjust the VPH to being less than
The cell voltage；
Equalizing circuit controller 402, be additionally operable to control the equalizing circuit 406 to disconnect the electric quantity balancing loop, make this first
Rechargable battery and the second rechargeable battery Bat2 and the charging equipment are the system power supply jointly；
Wherein, cell voltage is the second rechargeable battery Bat1 and second rechargeable battery Bat2 voltage.
In a feasible scheme, between first metal-oxide-semiconductor Q1 drain electrode and second rechargeable battery Bat1 positive pole
Connected by sampling resistor R1, the both ends of the R1 also electrically connect with euqalizing current monitor 403:
The euqalizing current monitor 403, it is additionally operable to perform following steps：
Whether the electricity for monitoring second rechargeable battery Bat1 reaches balanced with second rechargeable battery Bat2 electricity,
Including：
The average value of the euqalizing current repeatedly measured is taken multiple measurements and calculated to the euqalizing current of the sample circuit；
Judge the average value whether in default number range；
If so, determine that second rechargeable battery Bat1 electricity reaches balanced with second rechargeable battery Bat2 electricity.
In a feasible scheme, during electric quantity balancing, Charge Management controller, it is same to be additionally operable to monitoring in real time
Whether the output current of the charging equipment at one moment is more than the consumption electric current of system, and turns down VPH when judged result is to be
To cell voltage Vbat 150mV, continue the output of monitoring charging equipment after default time interval when judged result is no
Whether electric current meets charge condition；
Equalizing circuit controller, it is additionally operable in judged result for Q1_EN pins are dragged down into the Q1 shut-offs of control metal-oxide-semiconductor when being,
Q2_EN pins are drawn high into the Q2 conductings of control metal-oxide-semiconductor, Q3_EN pins are dragged down into the Q3 shut-offs of control metal-oxide-semiconductor.
The mobile terminal of the present embodiment, setting is balanced electric between the first rechargeable battery and the second rechargeable battery of series connection
Electric quantity balancing loop is connected on road, before charging, control equalizing circuit, make first rechargeable battery and second rechargeable battery it
Between formed loop carry out electric quantity balancing, just charged after the first rechargeable battery with the electric quantity balancing of the second rechargeable battery,
Improve rechargeable battery service life and safe to use.
On the basis of previous embodiment, the embodiment of the present invention three provides another series-connected cell charging method.It please join
Fig. 5 is read, method flow includes：
S501, Charge Management controller detect that charging equipment inserts.
S502, Charge Management controller obtain in real time the output current I_vbus of charging equipment multiple measurement results and
The consumption electric current I_sys of the system of mobile terminal multiple measurement results.
Specifically, I_vbus can with each second measurement once, respectively measure five its measurement results be respectively I_vbus1,
I_vbus2、I_vbus3、I_vbus4、I_vbus5。
Meanwhile each second of I_sys measurements are once, measure respectively five its measurement results be respectively I_sys 1, I_sys 2,
I_sys 3、I_sys 4、I_sys 5。
S503, management charging module obtain the output current I_vbus of charging equipment most respectively from multiple measurement results
Small value I_vbus_min and consumption electric current I_sys maximum.
In the present embodiment, I_vbus_min=min (I_vbus1 ... I_vbus5)；I_sys_max=max (I_vbus1 ...
I_vbus5)。
S504, judge whether I_vbus_min and I_sys_max difference is more than preset value, if so, execution step S505, no
Then after Charge Management spacing of controls 10s, step S502 is continued executing with.
In this step, setting preset value is 50ma, i.e. I_vbus_min-I_sys_max >=50mA.
Vph is adjusted to be higher than cell voltage Vbat 200mV by S505, Charge Management controller, and to equalizing circuit controller
Send battery electric quantity equalization instruction 1 and carry out electric quantity balancing.
Q1_EN pins are drawn high the Q1 conductings of control metal-oxide-semiconductor by S506, equalizing circuit controller, and Q2_EN pins are dragged down into control
Metal-oxide-semiconductor Q2 is turned off, and Q3_EN pins are drawn high into the Q3 conductings of control metal-oxide-semiconductor.
, can be simultaneously to the output current of euqalizing current and charging equipment during electric quantity balancing in practical application
Whether meet that charge condition is monitored.
Referring to Fig. 6, the monitoring to euqalizing current includes：
S601, equalizing circuit controller send euqalizing current acquisition instructions 2 to euqalizing current monitor.
S602, euqalizing current monitor enable current acquisition function collection euqalizing current I_balance, obtain multi collect
As a result.
In practical application, it can be measured five times respectively, its measurement result is respectively I_balance with measurement in each second once
1、I_balance 2、I_balance 3、I_balance 4、I_balance 5。
S603, euqalizing current monitor obtain the average value I_balance_avg of multi collect result.
In this step, I_balance_avg=(I_vbus1+ ...+I_vbus5)/5.
S604, euqalizing current monitor judge whether I_balance_avg meets -1mA<I_balance_avg<1mA, if
It is to perform step S605, step S602 is continued executing with after being otherwise spaced 15s.
S605, euqalizing current monitor send battery electric quantity equilibrium END instruction 3 to equalizing circuit controller.
Q1_EN pins are dragged down the Q1 shut-offs of control metal-oxide-semiconductor by S606, equalizing circuit controller, and Q2_EN pins are drawn high into control
Metal-oxide-semiconductor Q2 is turned on, and Q3_EN pins are dragged down into the Q3 shut-offs of control metal-oxide-semiconductor.
S607, equalizing circuit controller send charging instruction 4 to Charge Management controller.
S608, Charge Management controller enable charge function after receiving charging instruction 4, and series-connected cell charges normal.
Whether the monitoring of charge condition refers to Fig. 7 is met to the output current of charging equipment.
S701, Charge Management controller obtain output current of charger I_vbus and the consumption electric current I_sys of system in real time.
Whether S702, the I_vbus of Charge Management monitoring control devices synchronization are less than I_sys, if so, performing step
S703, otherwise continue executing with step S701.
In this step, if I_vbu is more than I_sys, the electric quantity balancing of serial connection charge battery continues.
S703, Charge Management controller turn down VPH to cell voltage Vbat 150mV, are sent to equalizing circuit controller
Battery powered instruction 4.
After S704, equalizing circuit controller receive battery powered instruction 4, Q1_EN pins are dragged down into control metal-oxide-semiconductor Q1 and closed
It is disconnected, Q2_EN pins are drawn high into the Q2 conductings of control metal-oxide-semiconductor, Q3_EN pins are dragged down into the Q3 shut-offs of control metal-oxide-semiconductor.
Step S507 is continued executing with after S705, interval 10s.
The series-connected cell charging method of the present embodiment, set between the first rechargeable battery and the second rechargeable battery of series connection
Equalizing circuit, before charging, control equalizing circuit connect electric quantity balancing loop, make first rechargeable battery and second charging
Loop is formed between battery and carries out electric quantity balancing, is just carried out after the first rechargeable battery with the electric quantity balancing of the second rechargeable battery
Charging, improve rechargeable battery service life and safe to use.
On the basis of previous embodiment, the embodiment of the present invention four provides a kind of computer-readable medium, the calculating
Machine computer-readable recording medium is stored with series-connected cell charging procedure, when the series-connected cell charging procedure is by least one computing device
When, the step of realizing series-connected cell charging method as described in embodiment one or embodiment three.
It should be noted that herein, term " comprising ", "comprising" or its any other variant are intended to non-row
His property includes, so that process, method, article or device including a series of elements not only include those key elements, and
And also include the other element being not expressly set out, or also include for this process, method, article or device institute inherently
Key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that including this
Other identical element also be present in the process of key element, method, article or device.
The embodiments of the present invention are for illustration only, do not represent the quality of embodiment.
Through the above description of the embodiments, those skilled in the art can be understood that above-described embodiment side
Method can add the mode of required general hardware platform to realize by software, naturally it is also possible to by hardware, but in many cases
The former is more preferably embodiment.Based on such understanding, technical scheme is substantially done to prior art in other words
Going out the part of contribution can be embodied in the form of software product, and the computer software product is stored in a storage medium
In (such as ROM/RAM, magnetic disc, CD), including some instructions to cause a station terminal (can be mobile phone, computer, service
Device, air conditioner, or network equipment etc.) perform method described in each embodiment of the present invention.
Embodiments of the invention are described above in conjunction with accompanying drawing, but the invention is not limited in above-mentioned specific
Embodiment, above-mentioned embodiment is only schematical, rather than restricted, one of ordinary skill in the art
Under the enlightenment of the present invention, in the case of present inventive concept and scope of the claimed protection is not departed from, it can also make a lot
Form, these are belonged within the protection of the present invention.
Claims (15)
1. a kind of series-connected cell charging method, it is characterised in that the series-connected cell charging method comprises the following steps：
When detecting charging equipment insertion, judge whether the output current of charging equipment meets charge condition；
If so, control connects electric quantity balancing loop located at the equalizing circuit between the first rechargeable battery and the second rechargeable battery, make
Loop is formed between first rechargeable battery and second rechargeable battery and carries out electric quantity balancing；
Whether the electricity for monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery；
If so, controlling the equalizing circuit to disconnect the electric quantity balancing loop, first rechargeable battery is set to be filled with described second
Battery starts to charge up.
2. series-connected cell charging method as claimed in claim 1, it is characterised in that it is described control located at the first rechargeable battery with
Equalizing circuit between second rechargeable battery, make formation electricity between first rechargeable battery and second rechargeable battery equal
Weigh loop progress electric quantity balancing, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to turn on, the second metal-oxide-semiconductor Q2 shut-offs；
Wherein, the drain electrode of the first metal-oxide-semiconductor Q1 electrically connects with the positive pole of first rechargeable battery, and source electrode fills with described second
The positive pole of battery and the second metal-oxide-semiconductor Q2 source electrode electrically connect, and grid is used to receive control signal, second metal-oxide-semiconductor
Q2 drain electrode is electrically connected with the drain electrode of the negative pole and the metal-oxide-semiconductor Q3 of first rechargeable battery, and grid, which is used to receive, to be controlled
Signal, the source electrode of the metal-oxide-semiconductor Q3 electrically connect with the negative pole of second rechargeable battery, and grid is used to receive control signal.
3. series-connected cell charging method as claimed in claim 2, it is characterised in that the control equalizing circuit disconnects institute
Electric quantity balancing loop is stated, including：
The first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 is controlled to disconnect, the second metal-oxide-semiconductor Q2 conductings.
4. the series-connected cell charging method as described in any one of claims 1 to 3, it is characterised in that the judgement charging equipment
Output current whether meet charge condition, in addition to：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electric current of system；
If so, determine that the output current meets charge condition.
5. series-connected cell charging method as claimed in claim 4, it is characterised in that the output of the monitoring charging equipment
Whether electric current is more than the consumption electric current of system, including：
Output current and the consumption electric current to the charging equipment take multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_sys_ in the I_vbus_min
During max, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than disappearing for system
The action of power consumption stream.
6. series-connected cell charging method as claimed in claim 4, it is characterised in that the drain electrode of the first metal-oxide-semiconductor Q1 and institute
State and connected by sampling resistor R1 between the positive pole of the first rechargeable battery, the both ends of the R1 are also electrically connected with euqalizing current monitor
Connect：
Whether the electricity of monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery, including：
The euqalizing current of the sample circuit is taken multiple measurements and calculates the average value of the euqalizing current repeatedly measured；
Judge the average value whether in default number range；
If so, determine that the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery.
7. series-connected cell charging method according to claim 1, during electric quantity balancing, the series-connected cell charging
Method also includes：
Whether the output current of the charging equipment of monitoring synchronization is more than the consumption electric current of the system in real time；
If so, the electric quantity balancing of serial connection charge battery continues；
Otherwise, the VPH is turned down to the voltage of rechargeable battery, control Q1, Q3 shut-off, Q2 conductings, and between the default time
The step of whether output current for judging charging equipment meets charge condition is continued executing with after.
A kind of 8. mobile terminal, it is characterised in that the mobile terminal include Charge Management controller, equalizing circuit controller,
Euqalizing current monitor, the first rechargeable battery connected with the Charge Management controller and the second rechargeable battery and located at institute
State the electric quantity balancing circuit between the first rechargeable battery and second rechargeable battery：
The Charge Management controller is connected with the equalizing circuit controller communication, for detecting charging equipment insertion
When, judge whether the output current of charging equipment meets charge condition；
The equalizing circuit controller, for the Charge Management controller judged result to be that time control sets up and filled in first
Electric quantity balancing circuit between battery and the second rechargeable battery connects electric quantity balancing loop, makes first rechargeable battery and institute
Formation loop carries out electric quantity balancing between stating the second rechargeable battery；
The euqalizing current monitor is connected with the equalizing circuit controller communication, for monitoring first rechargeable battery
Whether electricity reaches balanced with the electricity of second rechargeable battery；
The equalizing circuit controller, it is additionally operable to the electricity of the electricity and second rechargeable battery in first rechargeable battery
When reaching equilibrium, the equalizing circuit is controlled to disconnect the electric quantity balancing loop；
The Charge Management controller, when being additionally operable to disconnect in the electric quantity balancing loop, control first rechargeable battery with
Second rechargeable battery starts to charge up.
9. mobile terminal as claimed in claim 8, it is characterised in that the equalizing circuit includes the first metal-oxide-semiconductor Q1, second
Metal-oxide-semiconductor Q2 and the 3rd metal-oxide-semiconductor Q3, the first metal-oxide-semiconductor Q1 drain electrode electrically connect with the positive pole of first rechargeable battery, source electrode
Electrically connected with the positive pole of second rechargable battery and the source electrode of the second metal-oxide-semiconductor Q2, grid controls with the equalizing circuit
The Q1_EN pins electrical connection of device, the drain electrode of the second metal-oxide-semiconductor Q2 and negative pole and the MOS of first rechargeable battery
Pipe Q3 drain electrode electrical connection, grid electrically connect with the Q2_EN pins of the equalizing circuit controller, the source electrode of the metal-oxide-semiconductor Q3
Electrically connected with the negative pole of second rechargeable battery, grid electrically connects with the Q3_EN pins of the equalizing circuit；
The equalizing circuit, for by controlling the first metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 conductings, the second metal-oxide-semiconductor Q2 to turn off
Control the equalizing circuit to connect, make to form current balance loop between first rechargeable battery and second rechargeable battery
Carry out electric quantity balancing.
10. mobile terminal as claimed in claim 9, it is characterised in that the equalizing circuit, be additionally operable to by control first
Metal-oxide-semiconductor Q1 and the 3rd metal-oxide-semiconductor Q3 disconnects, the second metal-oxide-semiconductor Q2 conductings disconnect the equalizing circuit.
11. the mobile terminal as described in any one of claim 8 to 01, it is characterised in that the Charge Management controller, also use
In execution following steps：
When detecting charging equipment insertion, whether the output current for monitoring the charging equipment is more than the consumption electric current of system；
If so, determine that the output current meets charge condition.
12. mobile terminal as claimed in claim 11, it is characterised in that the Charge Management controller, be additionally operable to perform such as
Lower step：
Output current and the consumption electric current to the charging equipment take multiple measurements；
Obtain the minimum value I_vbus_min of output current and the maximum I_sys_max of consumption electric current；
Judge whether the I_vbus_min is more than the I_sys_max, and be less than the I_sys_ in the I_vbus_min
During max, whether the output current that the monitoring charging equipment is continued executing with after prefixed time interval is more than disappearing for system
The action of power consumption stream.
13. mobile terminal as claimed in claim 11, it is characterised in that the drain electrode and described first of the first metal-oxide-semiconductor Q1
Connected between the positive pole of rechargeable battery by sampling resistor R1, the both ends of the R1 are also electrically connected with the euqalizing current monitor
Connect：
The euqalizing current monitor, it is additionally operable to perform following steps：
Whether the electricity for monitoring first rechargeable battery reaches balanced with the electricity of second rechargeable battery, including：
The euqalizing current of the sample circuit is taken multiple measurements and calculates the average value of the euqalizing current repeatedly measured；
Judge the average value whether in default number range；
If so, determine that the electricity of first rechargeable battery reaches balanced with the electricity of second rechargeable battery.
14. mobile terminal as claimed in claim 11, it is characterised in that during electric quantity balancing, the Charge Management
Whether controller, the output current for being additionally operable to the charging equipment of monitoring synchronization in real time are more than the consumption electricity of the system
Stream, and in judged result to turn down VPH to charged battery voltage when being, when judged result is no in default time interval
Whether the output current for continuing to monitor charging equipment afterwards meets charge condition；
The equalizing circuit controller, it is additionally operable in judged result to control Q1, Q3 shut-off when being, Q2 is turned on.
15. a kind of computer-readable medium, it is characterised in that the computer-readable medium storage has series-connected cell charging journey
Sequence, when the series-connected cell charging procedure is by least one computing device, realize such as any one of claim 1 to 7 institute
The step of image processing method stated.
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| CN201711027707.1A CN107785961B (en) | 2017-10-27 | 2017-10-27 | Series battery charging method, mobile terminal and computer readable medium |
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| CN201711027707.1A CN107785961B (en) | 2017-10-27 | 2017-10-27 | Series battery charging method, mobile terminal and computer readable medium |
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