WO2017071280A1 - 电池倍压充电电路和移动终端 - Google Patents

电池倍压充电电路和移动终端 Download PDF

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Publication number
WO2017071280A1
WO2017071280A1 PCT/CN2016/088217 CN2016088217W WO2017071280A1 WO 2017071280 A1 WO2017071280 A1 WO 2017071280A1 CN 2016088217 W CN2016088217 W CN 2016088217W WO 2017071280 A1 WO2017071280 A1 WO 2017071280A1
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Prior art keywords
battery
charging unit
charging
voltage charging
voltage
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PCT/CN2016/088217
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English (en)
French (fr)
Inventor
孔繁博
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Le Holdings Beijing Co Ltd
Lemobile Information Technology (Beijing) Co Ltd
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Le Holdings Beijing Co Ltd
Lemobile Information Technology (Beijing) Co Ltd
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Priority to US15/232,693 priority Critical patent/US20170117724A1/en
Publication of WO2017071280A1 publication Critical patent/WO2017071280A1/zh
Anticipated expiration legal-status Critical
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    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries
    • H02J7/02—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries for charging batteries from AC mains by converters

Definitions

  • the present invention relates to the field of battery technology, and in particular to a battery double voltage charging circuit and a mobile terminal.
  • xC such as 0.7C, C, 1.5C, 2C, etc.
  • C the capacity of the battery
  • x the charging rate
  • the charging rate is larger. The shorter.
  • the increase in charging rate is more at the expense of lowering the energy density and higher charging temperature rise for mobile phone battery design.
  • the current battery quick charging scheme can be mainly divided into the following two categories:
  • the charging architecture diagram of the first type of battery charging scheme is as shown in FIG. 1.
  • the specific scheme is that the current output by the AC (alternating current) charger is directly input into the battery, and is not converted by the intermediate charging unit or PMIC.
  • the AC charger is complicated in design, and requires real-time communication between the AC charger and the mobile phone, and real-time acquisition of the state of the mobile phone battery to adjust the state of charge.
  • the solution can only transfer the heat generated by the traditional charging unit to the AC charger end. It is impossible to solve the temperature rise caused by the large current in the battery cell body of the mobile phone. Since the temperature rise caused by the large current of the battery body cannot be solved, the solution cannot further increase the charging rate. The experiment proves that 1.5C is already the kind. The limit of fast charging that the solution can provide.
  • the second type of battery charging scheme is a high voltage charging scheme, and the charging architecture diagram is as shown in FIG. 2.
  • the specific scheme is: by increasing the output voltage of the AC charger, using a universal connector, a charging interface, and a charging cable. The power is transmitted to the charging port of the mobile phone with high power, and then the output current capability of the charging unit is increased to realize fast charging of the fast mobile phone battery.
  • the existing second type of battery charging scheme although the design requirements of the AC charger are not high, and the existing charging interface and cable can be reused, the versatility of the charging accessory is good.
  • the following disadvantages still exist:
  • First, the conversion efficiency of the charging unit is about 90%. The higher the power passed, the greater the power loss, and the corresponding heat is more serious.
  • the two-way scheme can disperse heat, the experiment proves that it is the most A good current flow can only reach 4.5A, which cannot meet the demand for increasing the charging current as the battery capacity increases. In other words, the battery charging scheme is limited by the power supply capability of the charging unit.
  • Second, the heat problem caused by the high current charging of the battery itself is still unresolved.
  • the embodiment of the invention provides a battery double-voltage charging circuit and a mobile terminal, which are used to solve the problem that the battery body is heated when using a large current charging in the existing battery rapid charging scheme.
  • a battery voltage doubling charging circuit includes: a charging port, a high voltage charging unit, a low voltage charging unit, a battery pack, and a system, wherein the battery pack includes a main battery and at least one piece a secondary battery; wherein the high voltage charging unit and the low voltage charging unit are respectively connected to the charging port, the low voltage charging unit is respectively connected to the system and the battery group; the high voltage charging unit and the battery Connected to each other; when performing rapid charging, the main battery and each of the sub-batteries are switched to a series state, and a charging voltage is transmitted through the charging port to the high-voltage charging unit and the low-voltage charging unit, by the high voltage
  • the charging unit charges the main battery and each of the sub-batteries; meanwhile, the low-voltage charging unit is The system supplies power; when the charging is completed, the main battery and each of the sub-batteries are switched to a parallel state to supply power to the system.
  • the present invention also discloses a mobile terminal, comprising: a battery voltage charging circuit; wherein the battery voltage charging circuit comprises: a charging port, a high voltage charging unit, and a low voltage charging a unit, a battery pack, and a system, wherein the battery pack includes a main battery and at least one sub-battery; the high-voltage charging unit and the low-voltage charging unit are respectively connected to the charging port, and the low-voltage charging unit respectively The system, the battery pack is connected; the high-voltage charging unit is connected to the battery pack; when performing fast charging, the main battery and each of the sub-batteries are switched to a series state, and a charging voltage is passed through the charging port Transmitting to the high voltage charging unit and the low voltage charging unit, charging the main battery and each of the sub batteries by the high voltage charging unit; meanwhile, supplying power to the system by the low voltage charging unit; Upon completion, the main battery and each of the sub-batteries are switched to a parallel state to supply power
  • the battery voltage double charging circuit includes: a high voltage charging unit, a low voltage charging unit, and a battery pack including a main battery and at least one sub battery.
  • the main battery and each sub-battery are switched to the series state, and the high-voltage charging unit supplies a voltage doubled, that is, a voltage several times higher than the conventional ordinary charging voltage for charging.
  • the charging method using double voltage can increase the charging speed of the battery pack.
  • the batteries in the battery pack are connected in series, although the charging voltage is increased, the current value flowing through each of the batteries is not increased, so that the battery is not heated due to the excessive current flowing through the battery. .
  • the battery double-voltage charging circuit provided by the implementation of the invention can effectively solve the problem of battery heat generation caused by current increase on the battery body while providing rapid charging for the battery.
  • the battery double-voltage charging circuit provided by the embodiment of the present invention is configured to supply power to the system by the low-voltage charging unit when charging the battery, without charging the system by the battery pack to be charged, compared to the existing battery charging. In this case, the battery needs to supply power to the system while charging, and it can also increase the charging speed of the battery.
  • FIG. 1 is a charging architecture diagram of a prior art first type fast charging scheme
  • FIG. 2 is a charging architecture diagram of a prior art second type fast charging scheme
  • FIG. 3 is a schematic diagram of a battery voltage doubler charging circuit according to a first embodiment of the present invention.
  • FIG. 4 is a schematic diagram of a battery voltage doubler charging circuit according to a second embodiment of the present invention.
  • FIG. 3 there is shown a schematic diagram of a battery voltage doubler charging circuit in accordance with a first embodiment of the present invention.
  • the battery voltage double charging circuit of the embodiment of the present invention includes: a charging port 301, a high voltage charging unit 302, a low voltage charging unit 303, a battery pack 304, and a system 305, wherein the battery pack 304 includes a main battery 3041 and a sub battery 3042. .
  • the high voltage charging unit 302 and the low voltage charging unit 303 are respectively connected to the charging port 301, and the low voltage charging unit 303 is connected to the system 305 and the battery unit 304 respectively; the high voltage charging unit 302 is connected to the battery unit 304.
  • the main battery 3041 and the sub-battery are switched to the series state, and the charging voltage is transmitted to the high-voltage charging unit 302 and the low-voltage charging unit 303 through the charging port 301, and is passed from the high-voltage charging unit 302 to the main battery 3041 and the sub-battery 3042.
  • the system 305 is powered by the low voltage charging unit 303; when the charging is completed, the main battery 3041 and the secondary battery 3042 are switched to the parallel state to supply power to the system 305.
  • the battery pack When performing fast charging, it is set to supply power to the system by the low-voltage charging unit, without the need to supply power to the system by the battery pack to be charged, and the battery pack can be charged exclusively.
  • the battery needs to supply power to the system while charging, which can increase the charging speed of the battery.
  • each of the sub-batteries is switched to the state in which the sub-batteries are connected in parallel.
  • the battery double-voltage charging circuit provided by the embodiment of the present invention, although the voltage is doubled, since the batteries in the battery pack are connected in series, the current value flowing on each battery in the battery pack can be effectively reduced, thereby reducing the charging.
  • the battery double voltage charging circuit provided by the implementation of the present invention can use the conventional charging architecture to achieve fast charging without being limited by the future charging rate. For example, suppose that two 2000mAh batteries are used to achieve 4000mAh charging. For series voltage charging, if the charging current is 3000mA, the charging rate is 1.5C. Even if the charging rate is 2C, the charging current only needs 4A. The existing charging unit can be completely solved.
  • FIG. 3 only a sub-batter included in the battery pack is exemplarily shown. However, in a specific implementation process, it is not limited to providing only one sub-battery in the battery pack shown in the embodiment of the present invention, and two, three, four or more sub-batteries may be disposed.
  • the setting of the specific number of the sub-batteries can be set by the person skilled in the art according to the actual requirements in the specific implementation process, which is not specifically limited in the embodiment of the present invention.
  • the battery double voltage charging circuit provided by the embodiment of the invention can be applied to any suitable mobile terminal, such as a mobile phone, a tablet computer, etc., to provide a fast charging function for the mobile terminal.
  • the battery double-voltage charging circuit when performing rapid charging, the main battery and each sub-battery are switched to the series state, and the double voltage is provided by the high-voltage charging unit, that is, several times higher than the existing ordinary charging voltage. The voltage is charged.
  • the charging method using double voltage can increase the charging speed of the battery pack.
  • the batteries in the battery pack are connected in series, although the charging voltage is increased, the current value flowing through each of the batteries is not increased, so that the battery is not heated due to the excessive current flowing through the battery. . It can be seen that the battery double-voltage charging circuit provided by the implementation of the invention can effectively solve the problem of battery heat generation caused by current increase on the battery body while providing rapid charging for the battery.
  • FIG. 4 a schematic diagram of a battery voltage doubler charging circuit according to a second embodiment of the present invention is shown.
  • the battery double voltage charging circuit includes: a Charging port, a high voltage charging unit, a low voltage charging unit, a battery pack, and a system, wherein the battery pack includes a main battery. That is, the Main battery and a secondary battery, that is, the Send battery; wherein the low-voltage charging unit is a normal charging unit Nomal PMIC, which provides normal mode charging for the battery pack.
  • the high voltage charging unit and the low voltage charging unit in the battery voltage multiplying charging circuit are respectively connected to the charging port, the low voltage charging unit is respectively connected to the system and the battery pack, and the high voltage charging unit is also connected to the battery pack.
  • a first switch is disposed between a positive electrode of the secondary battery and a positive electrode of the high voltage charging unit and a positive electrode of the low voltage charging unit;
  • a second switch is disposed between the negative electrode of the secondary battery and the positive electrode of the main battery, and the negative electrode of the main battery The negative electrode of the main battery is connected to the negative electrode of the high voltage charging unit and the negative electrode of the low voltage charging unit.
  • a third changeover switch is disposed between the positive pole of the main battery and the positive pole of the low voltage charging unit. Further, a triode is disposed between the positive electrode of the main battery and the positive electrode of the low voltage charging unit, and the triode is connected in parallel with the third switching switch.
  • the first switch and the second switch may be single-pole double-throw switches, and the third switch is a single-pole single-throw switch.
  • the positive electrode of the secondary battery is electrically connected to the positive electrode of the high-voltage charging unit by adjusting the first switching switch
  • the negative electrode of the secondary battery is electrically connected to the positive electrode of the main battery by adjusting the second switching switch
  • the third switching is adjusted by adjusting the third switching.
  • the switch disconnects the anode of the main battery from the anode of the low voltage charging unit.
  • the battery double-voltage charging circuit can be controlled to supply power to the battery pack through the high-voltage charging unit, the low-voltage charging unit supplies power to the system, and the main battery and the secondary battery in the battery pack are connected in series. Finally, a fast charging process that achieves double voltage without increasing the current flowing through each battery in the battery pack is achieved.
  • the negative electrode of the secondary battery and the negative electrode of the main battery are turned on by adjusting the second switching switch, so that the main battery and the secondary battery are switched to the parallel state to supply power to the system.
  • the purpose of setting the triode in parallel for the third switching switch in the voltage doubler charging circuit is to set the low voltage charging when the third switching switch is turned off (ie, the positive pole of the main battery and the positive pole of the low voltage charging unit are disconnected).
  • the output voltage of the unit is higher than the maximum charging voltage of the main battery. Since the output voltage of the low-voltage charging unit is higher than the voltage of the main battery terminal, the triode is not turned on, so that the low-voltage charging unit can supply power to the system instead of the main The battery supplies power to the system.
  • the positive electrode of the sub-battery and the positive electrode of the low-voltage charging unit are turned on by adjusting the first switching switch, and the negative electrode of the sub-battery is electrically connected to the negative electrode of the main battery by adjusting the second switching switch, and the third switching is adjusted by adjusting the third switching.
  • the switch turns on the positive electrode of the main battery and the positive electrode of the low voltage charging unit.
  • the battery double-voltage charging circuit can be controlled to supply power to the battery pack through the low-voltage charging unit, the main battery is used to supply power to the system, and the main battery and the secondary battery in the battery pack are connected in parallel. That is to say, the battery pack is charged with a conventional voltage, and the battery pack supplies power to the system while charging.
  • the battery double voltage charging circuit does not discard the Normal PMIC. If the dedicated fast charger is not used, the Normal charger can also be enabled to charge the battery.
  • the battery double voltage charging circuit can meet the requirement of fast charging of the battery and meet the requirement of regular charging of the battery.
  • the charging circuit determines which charging method to use depending on whether the user uses a quick charger. In order to ensure the charge equalization, when using double voltage charging or fast charging, the single-pole single-throw switch shown in the figure, that is, the third switching switch, needs to be disconnected, and the normal PMIC output voltage is set higher than the highest charging voltage of the battery, and the normal PMIC is used. The system is powered to avoid shunting of the charging current by the system.
  • the charging mode is switched according to the connected charger. If the connected charger is a fast charger, perform a quick charge. If the connected charger is a regular power charger, perform regular charging.
  • a sub-battery included in the battery pack is taken as an example.
  • two, three, four, or more batteries may be disposed in the battery pack.
  • the block sub-battery, the setting of the specific number of blocks can be set by a person skilled in the art according to actual needs, which is not specifically limited in the embodiment of the present invention.
  • Table 1 is a statistical table of the highest voltage that the battery after series connection, the output voltage of the high-voltage charging unit, and the output voltage of the AC charger when the battery pack contains different battery cells and is quickly charged using a charging circuit.
  • the design of the battery double-voltage charging circuit needs to pay attention to the following four aspects: First, the AC charger that can be matched with the voltage doubler charging circuit, this part of the requirement is not complicated, and only needs to have a handshake with the mobile phone. Mechanism, you can achieve the boost output. The AC charger can use the fast charger that is mature on the market. You can also develop the AC charger yourself and develop the charging protocol yourself. You only need to have a handshake mechanism to boost the voltage, and you don't need to monitor the battery charging status in real time. Second, the use of existing charging accessories for the charging interface and charging cable can meet the requirements of fast charging. Third, the design of the charging unit can be compatible with double voltage charging and normal charging. Fourth, the battery string is converted.
  • each battery in the battery pack is connected in parallel, and each battery in the battery pack is serially connected only when fast charging is required.
  • the serial-to-parallel conversion can be realized by switching the switch, but it is necessary to ensure that the main battery is always connected to the system to supply power to the system after normal charging or charging is completed.
  • the embodiment of the present invention also provides a method for determining whether the battery in the battery pack is damaged:
  • the total battery power can be reported by counting only the charge and discharge amount of the Main battery, or the fuel gauge can be separately built in each battery, and each block can be built. The battery's power is counted to determine the total battery power; then, after determining the total power of the battery pack, the total power obtained is compared with the total power in the battery pack without the damaged battery, if the battery pack is twice The difference in the total amount of electricity is large, that is, the battery in the battery pack can be judged to be damaged.
  • the battery double-voltage charging circuit when performing rapid charging, the main battery and each sub-battery are switched to the series state, and the double voltage is provided by the high-voltage charging unit, that is, several times higher than the existing ordinary charging voltage. The voltage is charged.
  • the charging method using double voltage can increase the charging speed of the battery pack.
  • the batteries in the battery pack are connected in series, although the charging voltage is increased, the current value flowing through each of the batteries is not increased, so that the battery is not heated due to the excessive current flowing through the battery. . It can be seen that the battery double-voltage charging circuit provided by the implementation of the invention can effectively solve the problem of battery heat generation caused by current increase on the battery body while providing rapid charging for the battery.
  • a mobile terminal is further required to be included, and the mobile terminal includes the battery double voltage charging circuit claimed in the present application, and the specific setting position of the circuit in the mobile terminal may be It is set by the person skilled in the art according to actual needs, and details are not described in the embodiment of the present invention.
  • the battery voltage double charging circuit included in the mobile terminal of the embodiment of the present invention includes: a charging port, a high voltage charging unit, a low voltage charging unit, a battery pack, and a system, wherein the battery pack includes a main battery and at least one sub battery;
  • the high voltage charging unit and the low voltage charging unit are respectively connected to the charging port, and the low voltage charging unit is respectively connected to the system and the battery pack; and the high voltage charging unit is connected to the battery pack.
  • the main battery and each of the sub-batteries When performing rapid charging, the main battery and each of the sub-batteries are switched to a series state, and a charging voltage is transmitted through the charging port to the high-voltage charging unit and the low-voltage charging unit, and the high-voltage charging unit is The main battery and each of the sub-batteries are charged; at the same time, the low-voltage charging unit supplies power to the system; when charging is completed, the main battery and each of the sub-batteries are switched to a parallel state as described System power supply.
  • the battery pack in the battery double-voltage charging circuit included in the mobile terminal includes only one sub-battery; the positive pole of the battery is firstly disposed between the positive pole of the high-voltage charging unit and the positive pole of the low-voltage charging unit; a switch; a second switch between the negative electrode of the secondary battery and the positive electrode of the main battery; and the negative electrode of the main battery; a negative electrode of the main battery and a negative electrode of the high-voltage charging unit, and the low voltage
  • the negative pole of the charging unit is connected; a third switching switch is disposed between the anode of the main battery and the anode of the low voltage charging unit.
  • the positive electrode of the secondary battery is electrically connected to the positive electrode of the high voltage charging unit by adjusting the first switching switch in the battery voltage doubler charging circuit, by adjusting the second The switch causes the negative electrode of the sub-battery to be electrically connected to the positive electrode of the main battery, and the positive electrode of the main battery is disconnected from the positive electrode of the low-voltage charging unit by adjusting the third changeover switch.
  • the positive electrode of the secondary battery and the positive electrode of the low voltage charging unit are turned on by adjusting the first switching switch, by adjusting the first
  • the two switch switches the negative electrode of the secondary battery to the negative electrode of the main battery, and the positive electrode of the main battery and the positive electrode of the low voltage charging unit are turned on by adjusting the third switching switch.
  • a triode is disposed between a positive pole of the main battery and a positive pole of the low voltage charging unit, and the triode is connected in parallel with the third switching switch.
  • the battery double voltage charging circuit in the second embodiment may be omitted here.
  • the device embodiments described above are merely illustrative, wherein the units described as separate components may or may not be physically separate, and the components displayed as units may or may not be physical units, ie may be located A place, or it can be distributed to multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the embodiment. Those of ordinary skill in the art can understand and implement without deliberate labor.

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Abstract

一种电池倍压充电电路及移动终端，其中充电电路包括：充电端口（301）、高压充电单元（302）、低压充电单元（303）、电池组（304）以及系统（305），其中，电池组（304）包括一块主电池（3041）以及至少一块副电池（3042）；其中，高压充电单元（302）和低压充电单元（303）分别与充电端口（301）相连，低压充电单元（303）分别与系统（305）、电池组（304）相连；高压充电单元（302）与电池组（304）相连；当进行快速充电时，主电池（3041）与各副电池（3042）被切换至串联状态，充电电压通过充电端口（301）传输至高压充电单元（302）和低压充电单元（303），由高压充电单元（302）向主电池（3041）与各副电池（3042）中充电；同时，由低压充电单元（303）为系统（305）供电；当充电完毕时，主电池（3041）与各所述副电池（3042）被切换至并联状态为系统（305）供电。通过该电池倍压充电电路能够避免电池本体充电过程中发热过高的问题。

Description

电池倍压充电电路和移动终端
本申请要求在2015年10月26日提交中国专利局、申请号为201510703068.0、发明名称为“电池倍压充电电路和移动终端”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电池技术领域，特别是涉及电池倍压充电电路和移动终端。
背景技术
随着手机电池容量的增加，如何实现电池快速充电已经成为当下热点技术之一。业界一般以xC(如0.7C，C，1.5C，2C等)来定义手机电池充电快慢，其中C为电池的容量，x为充电倍率，在电池容量相同的情况下，充电倍率越大充电时间越短。但是充电倍率的提升对手机电池设计来说更多的是以能量密度的降低、及更高的充电温升为代价。无论是电池的容量增加(比如从2000mAh变化到3000mAh)还是充电倍率的增加，最终均将对整个手机的充电电路的通流能力提出更高的要求，比如3000mAh电池，1C充电需要充电支路提供3000mA电流，2C充电则要求充电支路具有6000mA电流的提供能力。不仅如此，在考虑充电之路电流提供能力的同时，还需要考虑大电流充电时电池本体发热的问题。可见，实现电池快速充电不仅对电池本身，对于充电电路、散热的设计都是一个极大的挑战。
现的电池快速充电方案主要可以分为以下两类：
第一类电池充电方案的充电架构图如附图1所示，该具体方案为：将AC(alternating current，交流电)充电器输出的电流直接输进电池，不经由中间充电单元即PMIC变换。
这种方案虽然能把充电支路的热损耗转移到AC充电器上，使得手机端的发热能够得到部分有效控制。但具有以下缺点：第一、AC充电器设计复杂，需要AC充电器与手机实时通讯，实时获取手机电池的状态来调整充电状态。第二、该方案只能把传统的充电单元产生的热转移到AC充电器端， 无法解决手机电池本体为了实现大倍率充电通过大电流所造成的温升，由于无法解决电池本体因大电流造成的升温问题，因此，该方案无法进一步提升充电倍率，实验证明1.5C已经是该种方案所能提供的快速充电的极限。第三、采用大电流充电，对充电通道的通流阻抗也需要严格控制，因此，连接器、充电端口、充电线缆均需要特殊选择，这将导致充电配件不具有通用性，每一次充电电流升级，都需要相应升级充电线缆及充电接口，实现成本高。
第二类电池充电方案为高压充电方案，充电架构图如附图2所示，该具体方案为：通过提升AC充电器的输出电压，在使用通用连接器、充电接口及充电线缆下，使电能大功率传输到手机充电端口，然后增加充电单元的输出电流能力来实现快速手机电池的快速充电。
现有的第二类电池充电方案，虽然对AC充电器的设计要求不高，且可复用已有的充电接口、线缆，充电配件的通用性好。但是依然存在以下缺点：第一、充电单元的变换效率为90％左右，通过的功率越高，功率损耗越大，相应的发热越严重，虽然采用双路方案能够分散热，但是实验证明目前最好的通流也仅能达到4.5A，无法满足随着电池容量的提升而提升充电电流的需求。也就意味着，该种电池充电方案受限于充电单元的供电能力。第二、电池本身由于大电流充电所带来的热的问题也依然得不到解决。
可见，现有的电池快速充电方案，均存在使用大电流充电时电池本体发热问题。
发明内容
本发明实施例提供了电池倍压充电电路和移动终端，用以解决现有的电池快速充电方案存在的使用大电流充电时电池本体发热的问题。
根据本发明的一个方面，本发明公开了一种电池倍压充电电路，包括：充电端口、高压充电单元、低压充电单元、电池组以及系统，其中，所述电池组包括一块主电池以及至少一块副电池；其中，所述高压充电单元和所述低压充电单元分别与所述充电端口相连，所述低压充电单元分别与所述系统、所述电池组相连；所述高压充电单元与所述电池组相连；当进行快速充电时，所述主电池与各所述副电池被切换至串联状态，充电电压通过所述充电端口传输至所述高压充电单元和所述低压充电单元，由所述高压充电单元向所述主电池与各所述副电池中充电；同时，由所述低压充电单元为 所述系统供电；当充电完毕时，所述主电池与各所述副电池被切换至并联状态为所述系统供电。
根据本发明的另一个方面，本发明还公开了一种移动终端，所述移动终端包括：电池倍压充电电路；其中，所述电池倍压充电电路包括：充电端口、高压充电单元、低压充电单元、电池组以及系统，其中，所述电池组包括一块主电池以及至少一块副电池；所述高压充电单元和所述低压充电单元分别与所述充电端口相连，所述低压充电单元分别与所述系统、所述电池组相连；所述高压充电单元与所述电池组相连；当进行快速充电时，所述主电池与各所述副电池被切换至串联状态，充电电压通过所述充电端口传输至所述高压充电单元和所述低压充电单元，由所述高压充电单元向所述主电池与各所述副电池中充电；同时，由所述低压充电单元为所述系统供电；当充电完毕时，所述主电池与各所述副电池被切换至并联状态为所述系统供电。
本发明实施例提供的电池倍压充电电路包括：高压充电单元、低压充电单元以及一个包括一块主电池以及至少一块副电池的电池组。当进行快速充电时，主电池与各副电池被切换至串联状态，由高压充电单元提供倍压即高于现有的普通充电电压几倍的电压进行充电。采用倍压进行充电的方案，能够提升电池组的充电速度。并且，由于电池组中的各电池串联，虽然充电电压提升，但是依然不会提升每块电池上所流通的电流值，因此，不会造成因电池流通电流过大而带来的电池发热的问题。可见，本发明实施提供的电池倍压充电电路，能够在为电池提供快速充电的同时，有效解决电池本体上因电流提升而造成的电池发热的问题。此外，本发明实施例提供的电池倍压充电电路，在为电池充电时，设置成由低压充电单元为系统供电，而无需由待充电的电池组为系统供电，相较于现有的电池充电方案，电池需要边充电边为系统供电，同样能够提升电池的充电速度。
上述说明仅是本发明技术方案的概述，为了能够更清楚了解本发明的技术手段，而可依照说明书的内容予以实施，并且为了让本发明的上述和其它目的、特征和优点能够更明显易懂，以下特举本发明的具体实施方式。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作一简单地介绍，显而易见地，下面描述中的附图是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1是现有的第一类快速充电方案的充电架构图；
图2是现有的第二类快速充电方案的充电架构图；
图3是根据本发明实施例一的一种电池倍压充电电路的示意图；
图4是根据本发明实施例二的一种电池倍压充电电路的示意图。
具体实施例
为使本发明实施例的目的、技术方案和优点更加清楚，下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
实施例一
参照图3，示出了本发明实施例一的一种电池倍压充电电路的示意图。
本发明实施例的电池倍压充电电路包括：充电端口301、高压充电单元302、低压充电单元303、电池组304以及系统305，其中，所述电池组304包括一块主电池3041以及一块副电池3042。
其中，高压充电单元302和低压充电单元303分别与充电端口301相连，低压充电单元303分别与系统305、电池组304相连；高压充电单元302与电池组304相连。
当进行快速充电时，主电池3041与副电池被切换至串联状态，充电电压通过充电端口301传输至高压充电单元302和低压充电单元303，由高压充电单元302向主电池3041与副电池3042中充电；同时，由低压充电单元303为系统305供电；当充电完毕时，主电池3041与副电池3042被切换至并联状态为系统305供电。
在进行快速充电时，设置成由低压充电单元为系统供电，而无需由待充电的电池组为系统供电，电池组专一的充电即可。相较于现有的电池充电电路，电池需要边充电边为系统供电，能够提升电池的充电速度。
需要说明的是，若电池组中包含多块副电池，那么，当进行快速充电时，主电池与各块副电池均串联。当充电完毕时，各块副电池均被切换至于副电池并联的状态。
采用本发明实施例提供的电池倍压充电电路，虽然使用倍压但是由于电池组中各块电池串联，因此，能够有效的降低电池组中的各块电池上流通的电流值，进而可以降低充电时电池本体的发热。本发明实施提供的电池倍压充电电路，可以使用传统充电架构来实现快速充电，同时又不受限于未来充电倍率的提升。比如假设使用两块2000mAh的电池来实现4000mAh充电，串联倍压充电时对于单块电池来说若充电电流是3000mA，充电倍率就是1.5C，即使充电倍率要达到2C，充电电流也仅需4A，现有的充电单元完全可以解决。
需要说明的是，在附图3中仅是示例性的展示了电池组中包含一块副电池。但是，在具体实现过程中，并不局限于本发明实施例中所展示的电池组中仅设置一块副电池，还可以设置两块、三块、四块或者更多块副电池。副电池的具体个数的设置，可以由本领域技术人员，在具体实现过程中根据实际需求进行设置，本发明实施例中对此不作具体限制。
本发明实施例提供的电池倍压充电电路可以适用于任意适当的移动终端，例如：手机、平板电脑等，为移动终端提供快速充电功能。
通过本发明实施例提供的电池倍压充电电路，当进行快速充电时，主电池与各副电池被切换至串联状态，由高压充电单元提供倍压即高于现有的普通充电电压几倍的电压进行充电。采用倍压进行充电的方法，能够提升电池组的充电速度。并且，由于电池组中的各电池串联，虽然充电电压提升，但是依然不会提升每块电池上所流通的电流值，因此，不会造成因电池流通电流过大而带来的电池发热的问题。可见，本发明实施提供的电池倍压充电电路，能够在为电池提供快速充电的同时，有效解决电池本体上因电流提升而造成的电池发热的问题。
实施例二
参照图4，示出了本发明实施例二的一种电池倍压充电电路的示意图。
如图4所示，本发明实施例提供的电池倍压充电电路包括：充电端口即Charging port、高压充电单元即High voltage PMIC、低压充电单元、电池组以及系统，其中，电池组包括一块主电池即Main battery以及一块副电池即Send battery；其中低压充电单元为普通充电单元Nomal PMIC，为电池组提供常规模式的充电。
如图4所示，电池倍压充电电路中的高压充电单元和低压充电单元分别与充电端口相连，低压充电单元分别与系统、电池组相连，高压充电单元也与电池组相连。具体地，副电池的正极与高压充电单元的正极、以及低压充电单元的正极之间设置有第一切换开关；副电池的负极与主电池正极、以及主电池负极之间设置有第二切换开关；主电池的负极与高压充电单元的负极、以及低压充电单元的负极相连。主电池的正极与低压充电单元的正极之间设置有第三切换开关。并且，在主电池的正极与低压充电单元的正极之间设置有三极管，且三极管与第三切换开关并联。其中，第一切换开关与第二切换开关可以为单刀双掷开关，第三切换开关为单刀单掷开关。
当进行快速充电时，通过调节第一切换开关使副电池的正极与高压充电单元的正极导通，通过调节第二切换开关使副电池的负极与主电池的正极导通，通过调节第三切换开关使主电池的正极与低压充电单元的正极断开。
通过采用如上方式调整三个切换开关，可控制电池倍压充电电路通过高压充电单元为电池组供电，由低压充电单元为系统供电，并且，使得电池组中的主电池与副电池成串联状态。最终实现倍压、且不增大电池组中各块电池上流通电流的快速充电流程。
当快速充电完毕时，通过调节第二切换开关使副电池的负极与主电池的负极导通，使主电池与副电池被切换至并联状态为系统供电。
本发明实施例中，在倍压充电电路中为第三切换开关并联设置三极管的目的为，当第三切换开关断开(即主电池的正极与低压充电单元的正极断开时)设置低压充电单元的输出电压高于主电池最高充电电压，由于低压充电单元的输出电压高于主电池端的电压，因此，三极管不导通，这样，便可实现由低压充电单元为系统供电，而不是由主电池为系统供电。
当进行常规充电时，通过调节第一切换开关使副电池的正极与低压充电单元的正极导通，通过调节第二切换开关使副电池的负极与主电池的负极导通，通过调节第三切换开关使主电池的正极与低压充电单元的正极导通。
通过采用如上方式调整三个切换开关，可控制电池倍压充电电路通过低压充电单元为电池组供电，由主电池为系统供电，并且，使得电池组中的主电池与副电池成并联状态。也就是说，采用常规电压为电池组进行充电，并且，电池组边充电边为系统供电。
可见，本发明实施例提供的电池倍压充电电路，并没有抛弃Normal PMIC，如果不使用专用的快速充电器，亦可启用Normal charger来给电池进行充电。该电池倍压充电电路既可满足对电池快速充电的需求，又可以满足对电池进行常规充电的需求。充电电路可根据用户是否使用了快速充电器决定采用哪种充电方式。为了保证充电均衡，使用倍压充电即快速充电时，需要将图中所示的单刀单掷开关即第三切换开关断开，设定Normal PMIC输出电压高于battery最高充电电压，利用Normal PMIC给系统供电，从而避免系统对充电电流的分流。
具体的，电池倍压充电电路在选择是对电池进行快速充电还是常规充电时，依据所连接的充电器进行充电模式的切换。若连接的充电器为快速充电器，则进行快速充电，若连接的充电器为常规功率充电器时，则进行常规充电。
需要说明的是，本发明实施例中仅是以电池组中包含一个副电池为例进行的说明，在具体实现过程中，在电池组中还可以设置两块、三块、四块或者更多块副电池，具体块数的设定可以由本领域技术人员根据实际需求进行设置，本发明实施例中对此不作具体限制。
表1为当电池组中包含不同块电池、使用充电电路进行快速充电时，串联后的电池所承受的最高电压、高压充电的单元的输出电压、以及AC充电器的输出电压的统计表。
表1
  串联最高电压 PMIC输出电压 AC充电器输出电压
2颗电池串联 8.8V 9V 9V
3颗电池串联 13.4V 14V 15V
4颗电池串联 17.8V 18V 20V
本发明实施中，对于电池倍压充电电路的设计需关注以下四个方面：第一、与倍压充电电路可匹配使用的AC充电器，这一部分要求并不复杂，只需要有和手机有握手机制，实现升压输出即可。AC充电器可使用目前市场上成熟的快速充电器；也可以自行开发AC充电器，自行开发充电协议，只需要有握手机制能够升压即可，无需实时监控电池充电状态。第二、对于充电接口、充电线缆使用现有的充电配件全可以满足快速充电的使用要求。第三、充电单元的设计，可以兼容倍压充电及普通充电。第四、电池串并转换，通常模式下电池组中的各块电池是并行连接，只有在需要快速充电时电池组中的各块电池才串行连接。串并转换通过切换开关切换即可实现，但是需要保证主电池始终接入系统，以在常规充电或者充电完成后，为系统供电。
本发明实施例中除对电池倍压充电电路的工作原理进行说明外，还提供了判断电池组中的电池是否受损的方法：
由于电池组中的各块电池串行充电、并联放电，因此，可以通过只统计Main battery充放电量的方法来上报电池组总电量，也可以在各块电池中分别内置电量计，将各块电池的电量进行统计以确定电池组总电量；然后，在确定电池组的总电量后，将得到的总电量与电池组中未存在受损电池情况下的总电量进行比较，如果两次电池组的总电量差异较大，即可以判断电池组中的电池受损。
通过本发明实施例提供的电池倍压充电电路，当进行快速充电时，主电池与各副电池被切换至串联状态，由高压充电单元提供倍压即高于现有的普通充电电压几倍的电压进行充电。采用倍压进行充电的方法，能够提升电池组的充电速度。并且，由于电池组中的各电池串联，虽然充电电压提升，但是依然不会提升每块电池上所流通的电流值，因此，不会造成因电池流通电流过大而带来的电池发热的问题。可见，本发明实施提供的电池倍压充电电路，能够在为电池提供快速充电的同时，有效解决电池本体上因电流提升而造成的电池发热的问题。
本发明实施例中还要求保护一种移动终端，该种移动终端包含本申请中所要求保护的电池倍压充电电路，对于电路在移动终端中的具体设置位置可 以由本领域技术人员根据实际需求进行设置，本发明实施例中对此不再赘述。
本发明实施例的移动终端中包含的电池倍压充电电路包括：充电端口、高压充电单元、低压充电单元、电池组以及系统，其中，所述电池组包括一块主电池以及至少一块副电池；所述高压充电单元和所述低压充电单元分别与所述充电端口相连，所述低压充电单元分别与所述系统、所述电池组相连；所述高压充电单元与所述电池组相连。
当进行快速充电时，所述主电池与各所述副电池被切换至串联状态，充电电压通过所述充电端口传输至所述高压充电单元和所述低压充电单元，由所述高压充电单元向所述主电池与各所述副电池中充电；同时，由所述低压充电单元为所述系统供电；当充电完毕时，所述主电池与各所述副电池被切换至并联状态为所述系统供电。
优选地，移动终端中包含的电池倍压充电电路中的电池组中仅包含一块副电池；电池的正极与所述高压充电单元的正极、以及所述低压充电单元的正极之间设置有第一切换开关；所述副电池的负极与所述主电池正极、以及所述主电池负极之间设置有第二切换开关；所述主电池的负极与所述高压充电单元的负极、以及所述低压充电单元的负极相连；所述主电池的正极与所述低压充电单元的正极之间设置有第三切换开关。
优选地，当进行快速充电时，在所述电池倍压充电电路中通过调节所述第一切换开关使所述副电池的正极与所述高压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的负极与所述主电池的正极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极断开。
优选地，当进行常规充电时，在所述电池倍压充电电路中，通过调节所述第一切换开关使所述副电池的正极与所述低压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的负极与所述主电池的负极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极导通。
优选地，在所述电池倍压充电电路中，所述主电池的正极与所述低压充电单元的正极之间设置有三极管，且所述三极管与所述第三切换开关并联。
对于移动终端中包含的电池倍压充电电路的具体结构，可参见实施例 一、实施例二中的电池倍压充电电路即可，在此不再赘述。
以上所描述的装置实施例仅仅是示意性的，其中所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部模块来实现本实施例方案的目的。本领域普通技术人员在不付出创造性的劳动的情况下，即可以理解并实施。
通过以上的实施方式的描述，本领域的技术人员可以清楚地了解到各实施方式可借助软件加必需的通用硬件平台的方式来实现，当然也可以通过硬件。基于这样的理解，上述技术方案本质上或者说对现有技术做出贡献的部分可以以软件产品的形式体现出来，该计算机软件产品可以存储在计算机可读存储介质中，如ROM/RAM、磁碟、光盘等，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行各个实施例或者实施例的某些部分所述的方法。
最后应说明的是：以上实施例仅用以说明本发明的技术方案，而非对其限制；尽管参照前述实施例对本发明进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本发明各实施例技术方案的精神和范围。

Claims (10)

  1. 一种电池倍压充电电路，其特征在于，包括：充电端口、高压充电单元、低压充电单元、电池组以及系统，其中，所述电池组包括一块主电池以及至少一块副电池；
    其中，所述高压充电单元和所述低压充电单元分别与所述充电端口相连，所述低压充电单元分别与所述系统、所述电池组相连；
    所述高压充电单元与所述电池组相连；
    当进行快速充电时，所述主电池与各所述副电池被切换至串联状态，充电电压通过所述充电端口传输至所述高压充电单元和所述低压充电单元，由所述高压充电单元向所述主电池与各所述副电池中充电；同时，由所述低压充电单元为所述系统供电；
    当充电完毕时，所述主电池与各所述副电池被切换至并联状态为所述系统供电。
  2. 根据权利要求1所述的充电电路，其特征在于，所述电池组中仅包含一块副电池；
    所述副电池的正极与所述高压充电单元的正极、以及所述低压充电单元的正极之间设置有第一切换开关；
    所述副电池的负极与所述主电池正极、以及所述主电池负极之间设置有第二切换开关；所述主电池的负极与所述高压充电单元的负极、以及所述低压充电单元的负极相连；
    所述主电池的正极与所述低压充电单元的正极之间设置有第三切换开关。
  3. 根据权利要求2所述的充电电路，其特征在于：
    当进行快速充电时，通过调节所述第一切换开关使所述副电池的正极与所述高压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的负极与所述主电池的正极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极断开。
  4. 根据权利要求2所述的充电电路，其特征在于：
    当进行常规充电时，通过调节所述第一切换开关使所述副电池的正极与所述低压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的 负极与所述主电池的负极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极导通。
  5. 根据权利要求4所述的充电电路，其特征在于：
    在所述主电池的正极与所述低压充电单元的正极之间设置有三极管，且所述三极管与所述第三切换开关并联。
  6. 一种移动终端，其特征在于，所述移动终端包括：电池倍压充电电路；
    其中，所述电池倍压充电电路包括：充电端口、高压充电单元、低压充电单元、电池组以及系统，其中，所述电池组包括一块主电池以及至少一块副电池；
    所述高压充电单元和所述低压充电单元分别与所述充电端口相连，所述低压充电单元分别与所述系统、所述电池组相连；
    所述高压充电单元与所述电池组相连；
    当进行快速充电时，所述主电池与各所述副电池被切换至串联状态，充电电压通过所述充电端口传输至所述高压充电单元和所述低压充电单元，由所述高压充电单元向所述主电池与各所述副电池中充电；同时，由所述低压充电单元为所述系统供电；
    当充电完毕时，所述主电池与各所述副电池被切换至并联状态为所述系统供电。
  7. 根据权利要求6所述的移动终端，其特征在于，所述电池组中仅包含一块副电池；
    所述副电池的正极与所述高压充电单元的正极、以及所述低压充电单元的正极之间设置有第一切换开关；
    所述副电池的负极与所述主电池正极、以及所述主电池负极之间设置有第二切换开关；所述主电池的负极与所述高压充电单元的负极、以及所述低压充电单元的负极相连；
    所述主电池的正极与所述低压充电单元的正极之间设置有第三切换开关。
  8. 根据权利要求7所述的移动终端，其特征在于：
    当进行快速充电时，在所述电池倍压充电电路中通过调节所述第一切换开关使所述副电池的正极与所述高压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的负极与所述主电池的正极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极断开。
  9. 根据权利要求8所述的移动终端，其特征在于：
    当进行常规充电时，在所述电池倍压充电电路中，通过调节所述第一切换开关使所述副电池的正极与所述低压充电单元的正极导通，通过调节所述第二切换开关使所述副电池的负极与所述主电池的负极导通，通过调节所述第三切换开关使所述主电池的正极与所述低压充电单元的正极导通。
  10. 根据权利要求9所述的移动终端，其特征在于：
    在所述电池倍压充电电路中，所述主电池的正极与所述低压充电单元的正极之间设置有三极管，且所述三极管与所述第三切换开关并联。
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