WO2018058940A1 - 一种基于双电池的充电系统、方法及移动终端 - Google Patents

一种基于双电池的充电系统、方法及移动终端 Download PDF

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Publication number
WO2018058940A1
WO2018058940A1 PCT/CN2017/080880 CN2017080880W WO2018058940A1 WO 2018058940 A1 WO2018058940 A1 WO 2018058940A1 CN 2017080880 W CN2017080880 W CN 2017080880W WO 2018058940 A1 WO2018058940 A1 WO 2018058940A1
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WIPO (PCT)
Prior art keywords
battery
charging
sub
main
charge
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PCT/CN2017/080880
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English (en)
French (fr)
Inventor
刁志明
童洪洁
Original Assignee
捷开通讯(深圳)有限公司
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Priority to EP17825724.2A priority Critical patent/EP3522327B1/en
Priority to US15/745,989 priority patent/US10886756B2/en
Publication of WO2018058940A1 publication Critical patent/WO2018058940A1/zh

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Classifications

    • 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
    • H02J7/0047—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048—Detection of remaining charge capacity or state of charge [SOC]
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
    • H01M10/00—Secondary cells; Manufacture thereof
    • H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
    • H01M10/44—Methods for charging or discharging
    • H01M10/441—Methods for charging or discharging for several batteries or cells simultaneously or sequentially
    • 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
    • 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
    • H02J7/0042—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/0045—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries characterised by the mechanical construction concerning the insertion or the connection of the batteries
    • 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
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads
    • 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
    • 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
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/342—The other DC source being a battery actively interacting with the first one, i.e. battery to battery charging
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/10—Energy storage using batteries

Definitions

  • the present invention relates to the field of mobile terminal charging technologies, and in particular, to a dual battery based charging system, method, and mobile terminal.
  • the use of large-capacity batteries or mobile phones with dual-battery solutions is better able to meet customers' needs for increased battery life.
  • the battery mobile phone cannot realize the requirement of simultaneously charging the mobile phone main battery and the backup battery at the same time, which brings inconvenience to the user charging.
  • an object of the present invention is to provide a charging system, method and mobile terminal based on a dual battery, which can switch the corresponding charging path according to the insertion state of the back cover battery, thereby achieving one-to-many charging.
  • the solution while charging the main battery and the secondary battery, greatly improves the charging efficiency.
  • a charging method based on a dual battery comprising the following steps:
  • the charging control unit controls the sub-battery to charge the main battery when the charger is not connected, the charging control unit is connected to the sub-charging chip; the charging control unit comprises an LED lamp group, and the LED lamp group is used to display the current deputy Battery power information;
  • A connected to the charger by a USB connector
  • the switch switch switches the corresponding charging path according to the insertion state of the back cover battery, and controls the main charging chip to charge the main battery when the rear cover battery is inserted, and controls the sub-charging chip to charge the sub-battery;
  • the main charging chip is controlled to charge the main battery.
  • a dual battery-based charging system includes a main board and a back cover battery, wherein the main board is provided with a main charging chip and a main battery, and the back cover battery is provided with a sub-charging chip and a sub-battery on the main board Also set with:
  • USB connector for connecting a charger
  • the switch is configured to switch the corresponding charging path according to the insertion state of the back cover battery, control the main charging chip to charge the main battery when the back cover battery is inserted, and control the sub charging chip to charge the sub battery; Controlling the main charging chip to charge the main battery;
  • the switch is connected to a USB connector, a main charging chip and a sub-charging chip, the main charging chip is also connected to a main battery, and the sub-charging chip is further connected to the sub-battery.
  • a mobile terminal comprising a dual battery based charging system as described above.
  • the dual battery-based charging system includes a main board and a back cover battery, wherein the main board is provided with a main charging chip. And a main battery, the back cover battery is provided with a sub-charging chip and a sub-battery, and the main board is further provided with a USB connector for connecting the charger, for switching the corresponding charging path according to the insertion state of the back cover battery Switching switch, when the back cover battery is inserted, controlling the main charging chip to charge the main battery, and controlling the sub-charging chip to charge the sub-battery; when the rear cover battery is pulled out, controlling the main charging chip to charge the main battery, according to the The insertion state of the cover battery switches the corresponding charging path, realizes a one-to-many charging scheme, and simultaneously charges the main battery and the sub-battery, thereby greatly improving the charging efficiency.
  • FIG. 1 is a structural block diagram of a dual battery based charging system provided by the present invention.
  • FIG. 2 is a flow chart of a dual battery based charging method provided by the present invention.
  • the object of the present invention is to provide a charging system, method and mobile terminal based on a dual battery, which can switch the corresponding charging path according to the insertion state of the back cover battery.
  • a one-to-many charging scheme is realized, and the main battery and the sub-battery are charged at the same time, which greatly improves the charging efficiency.
  • the dual battery-based charging system includes a main board 10 and a back cover battery 20 , wherein the main board 10 is provided with a main charging chip 11 and a main battery 12 as a main power source of the mobile terminal.
  • the terminal is powered, and the back cover battery 20 is provided with a sub-charging chip 21 and a sub-battery 22, and supplies power to the mobile terminal as a backup power source of the mobile terminal, and the dual-battery solution satisfies the customer's requirement for the endurance time.
  • the main board 10 is further provided with a USB connector 13 and a switch 14 connected to the USB connector 13, the main charging chip 11 and the sub-charging chip 21, and the main charging chip 11 is also connected to the main battery.
  • the sub-charging chip 21 is also connected to the sub-battery 22, the USB connector 13 is used to connect a charger; the switch 14 is used to switch the corresponding charging path according to the insertion state of the back cover battery 20, when the back cover When the battery 20 is inserted, the main charging chip 11 is controlled to charge the main battery 12, while the sub-charging chip 21 is controlled to charge the sub-battery 22; when the rear-cover battery 20 is pulled out, the main charging chip 11 is controlled to charge the main battery 12. Therefore, the current charging path is selected according to whether the back cover battery 20 is currently inserted, and a one-to-multiple charging scheme for simultaneously charging the main battery 12 and the sub-battery 22 can be realized when the rear cover battery 20 is inserted, which greatly improves the charging efficiency.
  • the capacity of the sub-battery 22 is preferably 3000 mAh, the model of the main charging chip 11 is BQ2429x, and the model of the sub-charging chip 21 is BQ24295.
  • BQ2429x the model of the main charging chip 11
  • BQ24295 the model of the sub-charging chip 21
  • the back cover battery 20 is further provided with a charging control unit 23, the charging control unit 23 is connected to the sub-charging chip 21, and the charging control unit 23 is configured to control the sub-battery 22 to the main battery 12 when the charger is not connected. Charging, that is, if the charger is not currently connected, and the sub-battery 22 has power, the sub-battery 22 can be controlled by the charging control unit 23 to charge the main battery 12, thereby powering the mobile terminal, ensuring the normal endurance of the mobile terminal and prolonging the endurance time. .
  • the charging path is as shown by the three arrowed line segments in FIG. 1.
  • the main charging chip 11 is controlled to charge the main battery 12
  • the sub charging chip 21 is controlled to charge the sub-battery 22.
  • the switch 14 performs path switching, so that the charging path is performed according to the solid line path (ie, the OUT2 path) in FIG.
  • the main charging chip 11 When the back cover battery 20 is not inserted, or the current back cover is not the normal back cover of the secondary battery 22, the main charging chip 11 is controlled to charge the main battery 12, and at this time, the switch 14 performs path switching so that the charging path is as shown in FIG.
  • the medium dense dotted path ie, the OUT1 path
  • the pin-main battery 12 is charged by the charger to the main battery 12 at this time.
  • the control sub-battery 22 charges the main battery 12 such that the charging path proceeds according to the sparse dotted line path in FIG. 1 in the order of: PMID of the sub-battery 22-sub-charging chip 21.
  • Pin-POGO Pin PMID_pin
  • Main board 10 at this time, the main battery 10 is powered by the sub-battery 22 and the main battery 12 is charged to meet the user's endurance requirements.
  • the charging control unit 23 includes a power-on key 231, a MUC, and an LED light group 233.
  • the MCU 232 is connected to a power-on key 231 and a sub-charging chip 21, and the LED light group 233 is connected to the MCU 232.
  • the switch key 231 is used to input a charge on command; the MCU 232 is configured to turn on the sub-charge chip 21 according to the charge-on command, and control the sub-battery 22 to charge the main battery 12; the LED set 233 is used to display the current sub-battery 22
  • the power switch key 231 can be a mechanical button disposed on the back cover battery 20, and can define command information input by the button, for example, when the button is pressed briefly, it is an input charge open command.
  • the button When the button is pressed for more than the preset time (for example, 3 s), it is an input charging off command.
  • the MCU 232 receives the charging opening command, the sub-charging chip 21 is turned on, thereby controlling the path of the sub-battery 22 according to the sparse dotted line.
  • the main board 10 is powered and the main battery 12 is charged.
  • an LED including a plurality of LED beads is also used.
  • the group 233 displays the current battery information of the sub-battery 22, that is, the number of currently lit LED bead is proportional to the amount of the sub-battery 22, and the user can know the remaining amount of the current sub-battery 22 at a glance, the LED lamp bead
  • the number is preferably four, and of course the number of LED beads can be increased or decreased as needed.
  • the model of the MCU 232 is MSP430G2332, and the LED lamp group 233 uses a plurality of chip LEDs of the type LED0603.
  • the back cover battery 20 is further provided with a low-voltage differential linear regulator LD0 (not shown) for voltage regulation and an overcurrent protection chip (not shown) for current limiting protection,
  • a low-voltage differential linear regulator LD0 (not shown) for voltage regulation
  • an overcurrent protection chip (not shown) for current limiting protection
  • the low-dropout linear regulator LD0 is of the type SGM2021_3V
  • the overcurrent protection chip is of the type TPS2553.
  • the present invention further provides a dual battery based charging method.
  • the dual battery based charging method includes the following steps:
  • the step S100 further includes the steps before:
  • the secondary control battery is charged by the charging control unit when the charger is not connected, and the charging control unit is connected to the secondary charging chip.
  • step S110 includes the following steps:
  • the charging input start command is input by the power on/off key
  • the MCU turns on the sub-charging chip according to the charging-on instruction, and controls the sub-battery to charge the main battery.
  • the present invention also correspondingly provides a mobile terminal comprising a dual battery based charging system as described above, as the dual battery based charging system has been described in detail above and will not be described in detail herein.
  • the dual battery-based charging system includes a main board and a back cover battery, wherein the main board is provided with a main charging chip and a main unit. a battery, the back cover battery is provided with a sub-charging chip and a sub-battery, and the main board is further provided with a USB connector for connecting the charger, and the switch for switching the corresponding charging path according to the insertion state of the back cover battery
  • the main charging chip is controlled to charge the main battery
  • the sub-charging chip is controlled to charge the sub-battery
  • the main charging chip is controlled to charge the main battery, and the battery can be charged according to the back cover.
  • the insertion state switches the corresponding charging path to realize a one-to-many charging scheme, and simultaneously charges the main battery and the sub-battery, thereby greatly improving the charging efficiency.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • General Chemical & Material Sciences (AREA)
  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种基于双电池的充电系统、方法及移动终端，其中，基于双电池的充电系统包括主板(10)和后盖电池(20)，其中，主板上设置有主充电芯片(11)和主电池(12)，后盖电池上设置有副充电芯片(21)和副电池(22)，主板上还设置有用于连接充电器的USB连接器(13)，用于根据后盖电池的插入状态切换相应的充电路径的切换开关(14)，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电，能根据后盖电池的插入状态切换相应的充电路径，实现一对多的充电方案，同时给主电池和副电池充电，大大提高了充电效率。

Description

一种基于双电池的充电系统、方法及移动终端
【技术领域】
本发明涉及移动终端充电技术领域，特别涉及一种基于双电池的充电系统、方法及移动终端。
【背景技术】
随着消费者对智能手机的续航能力要求越来越高，因此采用大容量电池或搭配双电池方案的手机是较好地能满足客户的对增加续航时间的需求，然而目前市面上搭配采用双电池的手机均无法实现同时对手机主电池以及备用电池同时充电的要求，给用户充电带来不便。
因而现有技术还有待改进和提高。
【发明内容】
鉴于上述现有技术的不足之处，本发明的目的在于提供一种基于双电池的充电系统、方法及移动终端，能根据后盖电池的插入状态切换相应的充电路径，实现一对多的充电方案，同时给主电池和副电池充电，大大提高了充电效率。
为了达到上述目的，本发明采取了以下技术方案：
一种基于双电池的充电方法，包括如下步骤：
A0、由充电控制单元在未连接充电器时控制副电池给主电池充电，所述充电控制单元连接副充电芯片；所述充电控制单元包括LED灯组，所述LED灯组用于显示当前副电池的电量信息；
A、由USB连接器连接充电器；
B、由切换开关根据后盖电池的插入状态切换相应的充电路径，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电。
一种基于双电池的充电系统，包括主板和后盖电池，其中，所述主板上设置有主充电芯片和主电池，所述后盖电池上设置有副充电芯片和副电池，所述主板上还设置有：
USB连接器，用于连接充电器；
切换开关，用于根据后盖电池的插入状态切换相应的充电路径，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电；
所述切换开关连接USB连接器、主充电芯片和副充电芯片，所述主充电芯片还连接主电池，所述副充电芯片还连接副电池。
一种移动终端，其中，包括如上所述的基于双电池的充电系统。
相较于现有技术，本发明提供的基于双电池的充电系统、方法及移动终端中，所述基于双电池的充电系统包括主板和后盖电池，其中，所述主板上设置有主充电芯片和主电池，所述后盖电池上设置有副充电芯片和副电池，所述主板上还设置有用于连接充电器的USB连接器，用于根据后盖电池的插入状态切换相应的充电路径的切换开关，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电，能根据后盖电池的插入状态切换相应的充电路径，实现一对多的充电方案，同时给主电池和副电池充电，大大提高了充电效率。
【附图说明】
图1为本发明提供的基于双电池的充电系统的结构框图。
图2为本发明提供的基于双电池的充电方法的流程图。
【具体实施方式】
鉴于现有技术中无法同时对主电池和副电池充电等缺点，本发明的目的在于提供一种基于双电池的充电系统、方法及移动终端，能根据后盖电池的插入状态切换相应的充电路径，实现一对多的充电方案，同时给主电池和副电池充电，大大提高了充电效率。
为使本发明的目的、技术方案及效果更加清楚、明确，以下参照附图并举实施例对本发明进一步详细说明。应当理解，此处所描述的具体实施例仅用以解释本发明，并不用于限定本发明。
请参阅图1，本发明提供的基于双电池的充电系统包括主板10和后盖电池20，其中，所述主板10上设置有主充电芯片11和主电池12，作为移动终端的主电源为移动终端供电，而所述后盖电池20上设置有副充电芯片21和副电池22，作为移动终端的备用电源为移动终端供电，双电池方案满足客户对续航时间的要求。其中，所述主板10上还设置有USB连接器13和切换开关14，所述切换开关14连接USB连接器13、主充电芯片11和副充电芯片21，所述主充电芯片11还连接主电池12，所述副充电芯片21还连接副电池22，所述USB连接器13用于连接充电器；所述切换开关14用于根据后盖电池20的插入状态切换相应的充电路径，当后盖电池20插入时控制主充电芯片11对主电池12进行充电，同时控制副充电芯片21对副电池22进行充电；当后盖电池20拔出时控制主充电芯片11对主电池12进行充电。从而根据当前是否插入了后盖电池20来选择当前的充电路径，在后盖电池20插入时可实现同时对主电池12和副电池22进行充电的一对多充电方案，大大提高了充电效率。其中副电池22容量优选为3000mAh，主充电芯片11的型号为BQ2429x，副充电芯片21的型号为BQ24295，当然也可采用其他具有相同功能的充电芯片，本发明对此不做限定。
进一步地，所述后盖电池20上还设置有充电控制单元23，所述充电控制单元23连接副充电芯片21，充电控制单元23用于在未连接充电器时控制副电池22给主电池12充电，即若当前没有连接充电器，且副电池22还有电时，可以通过充电控制单元23控制副电池22给主电池12充电，从而给移动终端供电，保证移动终端正常续航，延长续航时间。
具体实施时，充电路径如图1中的三条带箭头线段所示，当后盖电池20插入时，控制主充电芯片11对主电池12进行充电，同时控制副充电芯片21对副电池22进行充电，此时切换开关14进行路径切换，使得充电路径按照图1中实线路径（即OUT2路径）进行，顺序为：充电器-USB连接器13-切换开关14-主板10与后盖电池20之间的POGO Pin(Vbus2_pin)-副充电芯片21的Vbus2 pin-副电池22；以及充电器-USB连接器13-切换开关14-主板10与后盖电池20之间的POGO Pin(Vbus2_pin)-副充电芯片21的Vbus2 pin-副充电芯片21的PMID pin-主板10与后盖电池20之间的POGO Pin(PMID_pin)- 主充电芯片11的Vbus1 pin-主电池12/主板10，从而实现了同时对主电池12和副电池22进行充电。
当后盖电池20未插入，或者当前后盖并非具有副电池22的普通后盖时，控制主充电芯片11对主电池12进行充电，此时切换开关14进行路径切换，使得充电路径按照图1中密集虚线路径（即OUT1路径）进行，顺序为：充电器-USB连接器13-切换开关14-主充电芯片11的Vbus1 pin-主电池12，此时由充电器向主电池12充电。
当没有连接充电器，且后盖电池20插入时，控制副电池22给主电池12充电，使得充电路径按照图1中稀疏虚线路径进行，顺序为：副电池22-副充电芯片21的PMID pin-主板10与后盖之间的POGO Pin(PMID_pin) - 主充电芯片11的Vbus1 pin-主电池12.主板10，此时实现通过副电池22给主板10供电并对主电池12进行充电，满足用户的续航要求。
具体地，所述充电控制单元23包括电源开关键231、MUC和LED灯组233，所述MCU232连接电源开关键231和副充电芯片21，所述LED灯组233连接MCU232，其中，所述电源开关键231用于输入充电开启指令；所述MCU232用于根据所述充电开启指令开启副充电芯片21，控制副电池22给主电池12充电；所述LED灯组233用于显示当前副电池22的电量信息，所述电源开关键231可采用设置在后盖电池20上的机械按键，可定义该按键输入的指令信息，例如当该按键被短暂按下时，即为输入充电开启指令，当被长按超过预设时间（例如3s）时，即为输入充电关闭指令，当MCU232接收到所述充电开启指令时，将开启副充电芯片21，从而控制副电池22按照稀疏虚线所示的路径给主板10供电并给主电池12充电，同时，为了让用户清楚知晓当前副电池22的电量，预估续航时间，还采用包括若干个LED灯珠的LED灯组233来显示当前副电池22的电量信息，即当前点亮的LED灯珠的数量与副电池22的电量成正比，用户可一目了然的知道当前副电池22的剩余电量，所述LED灯珠的数量优选为4颗，当然也可根据需要增加或减少LED灯珠的数量。本实施例中，所述MCU232的型号为MSP430G2332，LED灯组233采用若干个型号为LED0603的贴片式LED。
优选地，所述后盖电池20上还设置有用于稳压的低压差线性稳压器LD0（图中未示出）和用于限流保护的过流保护芯片（图中未示出），确保充电的稳定性和安全性，所述低压差线性稳压器LD0的型号为SGM2021_3V，所述过流保护芯片的型号为TPS2553。
采用上述基于双电池的充电系统，本发明还相应提供一种基于双电池的充电方法，如图2所示，所述基于双电池的充电方法包括如下步骤：
S100、由USB连接器连接充电器；
S200、由切换开关根据后盖电池的插入状态切换相应的充电路径，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电。
所述步骤S100之前还包括步骤：
S110、由充电控制单元在未连接充电器时控制副电池给主电池充电，所述充电控制单元连接副充电芯片。
具体地，所述步骤S110包括步骤：
S111、由电源开关键输入充电开启指令；
S112、由MCU根据所述充电开启指令开启副充电芯片，控制副电池给主电池充电；
S113、由LED灯组显示当前副电池的电量信息。
具体的路径切换以及充电控制的实施例请参阅上述系统对应的实施例。
本发明还相应提供一种移动终端，其包括如上所述的基于双电池的充电系统，由于上文已对所述基于双电池的充电系统进行了详细描述，此处不作详述。
综上所述，本发明提供的基于双电池的充电系统、方法及移动终端中，所述基于双电池的充电系统包括主板和后盖电池，其中，所述主板上设置有主充电芯片和主电池，所述后盖电池上设置有副充电芯片和副电池，所述主板上还设置有用于连接充电器的USB连接器，用于根据后盖电池的插入状态切换相应的充电路径的切换开关，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电，能根据后盖电池的插入状态切换相应的充电路径，实现一对多的充电方案，同时给主电池和副电池充电，大大提高了充电效率。
可以理解的是，对本领域普通技术人员来说，可以根据本发明的技术方案及其发明构思加以等同替换或改变，而所有这些改变或替换都应属于本发明所附的权利要求的保护范围。

Claims (12)

  1. 一种基于双电池的充电方法，其中，包括如下步骤：
    A0、由充电控制单元在未连接充电器时控制副电池给主电池充电，所述充电控制单元连接副充电芯片；所述充电控制单元包括LED灯组，所述LED灯组用于显示当前副电池的电量信息；
    A、由USB连接器连接充电器；
    B、由切换开关根据后盖电池的插入状态切换相应的充电路径，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电。
  2. 根据权利要求1所述的基于双电池的充电方法，其中，所述步骤A0包括步骤：
    A01、由电源开关键输入充电开启指令；
    A02、由MCU根据所述充电开启指令开启副充电芯片，控制副电池给主电池充电。
  3. 一种基于双电池的充电系统，包括主板和后盖电池，其中，所述主板上设置有主充电芯片和主电池，所述后盖电池上设置有副充电芯片和副电池，所述主板上还设置有：
    USB连接器，用于连接充电器；
    切换开关，用于根据后盖电池的插入状态切换相应的充电路径，当后盖电池插入时控制主充电芯片对主电池进行充电，同时控制副充电芯片对副电池进行充电；当后盖电池拔出时控制主充电芯片对主电池进行充电；
    所述切换开关连接USB连接器、主充电芯片和副充电芯片，所述主充电芯片还连接主电池，所述副充电芯片还连接副电池。
  4. 根据权利要求3所述的基于双电池的充电系统，其中，所述后盖电池上还设置有充电控制单元，用于在未连接充电器时控制副电池给主电池充电，所述充电控制单元连接副充电芯片。
  5. 根据权利要求4所述的基于双电池的充电系统，其中，所述充电控制单元包括：
    电源开关键，用于输入充电开启指令；
    MCU，用于根据所述充电开启指令开启副充电芯片，控制副电池给主电池充电；
    所述MCU连接电源开关键和副充电芯片。
  6. 根据权利要求5所述的基于双电池的充电系统，其中，所述充电控制单元还包括LED灯组，用于显示当前副电池的电量信息；所述LED灯组连接MCU。
  7. 根据权利要求5所述的基于双电池的充电系统，其中，所述 MCU的型号为MSP430G2332。
  8. 一种移动终端，其中，包括如权利要求3所述的基于双电池的充电系统。
  9. 根据权利要求8所述的移动终端，其中，所述后盖电池上还设置有充电控制单元，用于在未连接充电器时控制副电池给主电池充电，所述充电控制单元连接副充电芯片。
  10. 根据权利要求9所述的移动终端，其中，所述充电控制单元包括：
    电源开关键，用于输入充电开启指令；
    MCU，用于根据所述充电开启指令开启副充电芯片，控制副电池给主电池充电；
    所述MCU连接电源开关键和副充电芯片。
  11. 根据权利要求10所述的移动终端，其中，所述充电控制单元还包括LED灯组，用于显示当前副电池的电量信息；所述LED灯组连接MCU。
  12. 根据权利要求10所述的移动终端，其中，所述MCU的型号为MSP430G2332。
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