WO2021031297A1 - 一种充电盒 - Google Patents

一种充电盒 Download PDF

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Publication number
WO2021031297A1
WO2021031297A1 PCT/CN2019/108946 CN2019108946W WO2021031297A1 WO 2021031297 A1 WO2021031297 A1 WO 2021031297A1 CN 2019108946 W CN2019108946 W CN 2019108946W WO 2021031297 A1 WO2021031297 A1 WO 2021031297A1
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WIPO (PCT)
Prior art keywords
voltage
charging
resistor
voltage conversion
battery
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/CN2019/108946
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English (en)
French (fr)
Inventor
郎允森
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Goertek Inc
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Goertek Inc
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Filing date
Publication date
Application filed by Goertek Inc filed Critical Goertek Inc
Priority to US17/623,998 priority Critical patent/US12244166B2/en
Publication of WO2021031297A1 publication Critical patent/WO2021031297A1/zh
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; ELECTRIC HEARING AIDS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1025—Accumulators specially adapted for earpieces; Arrangements specially adapted for charging thereof
    • 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
    • H02J7/70—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the mechanical construction
    • H02J7/731—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries characterised by the mechanical construction specially adapted for holding portable devices containing batteries
    • 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
    • H02J7/80—Circuit arrangements for charging or discharging batteries or for supplying loads from batteries including monitoring or indicating arrangements
    • H02J7/82—Control of state of charge [SOC]
    • 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
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/94—Regulation of charging or discharging current or voltage in response to battery current
    • H02J7/947—Regulation of charging or discharging current or voltage in response to battery current in response to integrated charge or discharge current
    • 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
    • H02J7/90—Regulation of charging or discharging current or voltage
    • H02J7/96—Regulation of charging or discharging current or voltage in response to battery voltage
    • 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
    • H02J2207/00—Details of circuit arrangements for charging or discharging batteries or supplying loads from batteries
    • H02J2207/20—Charging or discharging characterised by the power electronics converter

Definitions

  • the present invention relates to charging technology, and more specifically, the present invention relates to a charging box.
  • TWS Truste Wireless Stereo headphones
  • TWS earphones usually include separate left-ear earphones and right-ear earphones. There is no wire between the two, which completely get rid of the shackles of the wire.
  • TWS headsets currently on the market generally use a charging box to charge the headset.
  • the principle block diagram of the charging part is shown in Figure 1: The left part is part of the circuit of the charging box, and the right part is part of the circuit of the earphone.
  • a contact type connection (Pogo Pin) is used between the charging box and the earphone to achieve charging and communication functions.
  • the positive electrode of the battery in the charging box is connected with the input terminal of the voltage conversion chip
  • the output terminal of the voltage conversion chip is connected with the positive contact T1 of the charging box
  • the negative electrode of the battery in the charging box is connected with the negative contact T2 of the charging box.
  • the input terminal of the charge management chip is connected to the positive contact T11 of the earphone terminal
  • the output terminal is connected to the positive electrode of the earphone terminal battery
  • the negative electrode of the earphone terminal battery is connected to the negative contact T12.
  • the positive contact T1 of the charging box is connected with the positive contact T11 of the earphone, and the negative contact T2 of the charging box is connected with the negative contact T12 of the earphone.
  • the controller of the charging box detects that the earphone is inserted through the detection circuit (not shown in FIG. 1), and sends a control signal to the enable terminal of the voltage conversion chip to make the voltage conversion chip enter the working state, thus forming a charging path.
  • the direct current provided by the battery of the charging box is boosted by the voltage conversion chip, and then the headset battery is charged through the charging management chip.
  • the charge management chip plays a management role, mainly adjusting the charging current according to the voltage of the headset battery.
  • the charging efficiency of the charging management chip is relatively low, resulting in a decrease in the overall path efficiency when the charging box charges the earphone.
  • the object of the present invention is to provide a charging case with higher charging efficiency.
  • a charging box which includes a control module, a charging box battery, and a voltage conversion module;
  • the charging box battery is connected to the voltage conversion module; the voltage conversion module is used to convert the direct current output from the charging box battery into a charging voltage and output it to the charging management chip of the device to be charged, so as to be treated by the charging management chip Charge the battery of the charging device;
  • the control module is configured to adjust the charging voltage output by the voltage conversion module according to the voltage of the battery of the device to be charged during the process of charging the battery of the device to be charged.
  • the adjusting the charging voltage output by the voltage conversion module according to the voltage of the battery of the device to be charged includes:
  • the charging voltage target value is calculated; the charging voltage target value is the sum of the current voltage value of the battery of the device to be charged, the current voltage drop value of the charging path, and the charging threshold of the charging management chip; wherein the charging path is Refers to the path from the output terminal of the voltage conversion module to the input terminal of the charging management chip;
  • the charging voltage output by the voltage conversion module is adjusted according to the charging voltage target value.
  • the adjusting the charging voltage output by the voltage conversion module according to the charging voltage target value includes:
  • the charging voltage output by the voltage conversion module is the voltage of the charging box battery, or the voltage conversion module performs a step-down process to make the charging voltage equal to the charging voltage. Said charging voltage target value;
  • the charging voltage output by the voltage conversion module is the voltage of the charging box battery
  • the voltage conversion module performs a boosting process to make the charging voltage equal to the charging voltage target value.
  • the charging box includes a memory; the memory stores the corresponding relationship between the voltage drop value of the charging path and the voltage value of the battery of the device to be charged;
  • the calculating the charging voltage target value includes: searching for the voltage drop value of the charging path corresponding to the current voltage value of the battery of the device to be charged as the current voltage drop value of the charging path.
  • the voltage conversion module includes a voltage conversion chip, a first resistor, a second resistor, a controlled switch, and a positive electrode contact and a negative electrode contact for connecting with a device to be charged;
  • the voltage conversion chip and the controlled switch are connected in parallel, and the voltage conversion chip and the controlled switch are respectively connected between the positive electrode and the positive contact of the charging box battery; the input terminal of the voltage conversion chip is connected with the positive electrode of the charging box battery , The output terminal is connected with the positive contact;
  • the output end of the voltage conversion chip is connected to one end of the first resistor, the other end of the first resistor is connected to the first end of the second resistor, and the second end of the second resistor is grounded; the voltage feedback end of the voltage conversion chip is connected to the first end of the second resistor. The first end of the two resistors is connected;
  • the control module is respectively connected to the enable end of the voltage conversion chip, the control end of the controlled switch, and the resistance adjustment end of the second resistor;
  • the negative electrode of the battery of the charging box is connected with the negative electrode contact.
  • control module is configured to:
  • control module controls the voltage conversion chip to stop working and controls the controlled switch to turn on;
  • control module controls the controlled switch to turn off, and the control module controls the voltage conversion chip to perform boosting work and adjusts the resistance of the second resistor so that The charging voltage is equal to the charging voltage target value.
  • the second resistor is a digital resistor or a digital potentiometer.
  • the voltage conversion module includes a voltage conversion chip, a third resistor, a fourth resistor, a resistance-capacitance network, a controlled switch, and a positive electrode contact and a negative electrode contact for connecting with a device to be charged;
  • the voltage conversion chip and the controlled switch are connected in parallel, and the voltage conversion chip and the controlled switch are respectively connected between the positive electrode and the positive contact of the charging box battery; the input terminal of the voltage conversion chip is connected with the positive electrode of the charging box battery , The output terminal is connected with the positive contact;
  • the output end of the voltage conversion chip is connected to one end of the third resistor, the other end of the third resistor is connected to the first end of the fourth resistor, and the second end of the fourth resistor is grounded; the voltage feedback end of the voltage conversion chip is connected to the first end of the fourth resistor. The first end of the four resistors is connected;
  • the RC network is connected between the pulse signal output terminal of the control module and the first terminal of the fourth resistor;
  • the control module is respectively connected with the enable terminal of the voltage conversion chip and the control terminal of the controlled switch;
  • the negative electrode of the battery of the charging box is connected with the negative electrode contact.
  • control module is configured to:
  • control module controls the voltage conversion chip to stop working and controls the controlled switch to turn on;
  • the control module controls the controlled switch to turn off, the control module controls the voltage conversion chip to perform boosting work and adjusts the duty cycle of the pulse signal output by the control module Ratio such that the charging voltage is equal to the charging voltage target value.
  • the RC network includes a fifth resistor, a sixth resistor, and a first capacitor
  • the fifth resistor and the sixth resistor are connected in series between the pulse signal output end of the control module and the first end of the fourth resistor;
  • One end of the first capacitor is connected between the fifth resistor and the sixth resistor, and the other end is grounded.
  • the voltage conversion module includes a voltage conversion chip, a seventh resistor, an eighth resistor, a ninth resistor, a controlled switch, a digital-to-analog conversion unit, a positive contact for connecting with the device to be charged, and Negative contact
  • the voltage conversion chip and the controlled switch are connected in parallel, and the voltage conversion chip and the controlled switch are respectively connected between the positive electrode and the positive contact of the charging box battery; the input terminal of the voltage conversion chip is connected with the positive electrode of the charging box battery , The output terminal is connected with the positive contact;
  • the output end of the voltage conversion chip is connected to one end of the seventh resistor, the other end of the seventh resistor is connected to the first end of the eighth resistor, and the second end of the eighth resistor is grounded; the voltage feedback end of the voltage conversion chip is connected to the first end of the eighth resistor. Connect the first end of the eight resistors;
  • the digital adjustment signal output end of the control module is connected to the input end of the digital-to-analog conversion unit, the output end of the digital-to-analog conversion unit is connected to one end of the ninth resistor, and the other end of the ninth resistor is connected to the first end of the eighth resistor ;
  • the control module is respectively connected with the enable terminal of the voltage conversion chip and the control terminal of the controlled switch;
  • the negative electrode of the battery of the charging box is connected with the negative electrode contact.
  • control module is configured to:
  • control module controls the voltage conversion chip to stop working and controls the controlled switch to turn on;
  • the control module controls the controlled switch to turn off, the control module controls the voltage conversion chip to perform boosting work and adjusts the voltage output by the digital-to-analog conversion unit So that the charging voltage is equal to the charging voltage target value.
  • the voltage conversion module includes a voltage conversion chip, a tenth resistor, an eleventh resistor, a twelfth resistor, a digital-to-analog conversion unit, a positive electrode contact and a negative electrode contact for connecting with the device to be charged. point;
  • the input end of the voltage conversion chip is connected to the positive electrode of the charging box battery, and the output end is connected to the positive electrode contact;
  • the output end of the voltage conversion chip is connected to one end of the tenth resistor, the other end of the tenth resistor is connected to the first end of the eleventh resistor, and the second end of the eleventh resistor is grounded; the voltage feedback end of the voltage conversion chip Connect with the first end of the eleventh resistor;
  • the digital adjustment signal output end of the control module is connected to the input end of the digital-to-analog conversion unit, the output end of the digital-to-analog conversion unit is connected to one end of the twelfth resistor, and the other end of the twelfth resistor is connected to the first end of the eleventh resistor.
  • the control module is connected to the enable terminal of the voltage conversion chip
  • the negative electrode of the battery of the charging box is connected with the negative electrode contact.
  • control module controls the voltage conversion chip to work and outputs a digital adjustment signal so that the charging voltage output by the voltage conversion chip is the charging voltage target value.
  • the charging box provided by the embodiment of the present invention can adjust the charging voltage output by the charging box in real time during the charging process, thereby improving the charging efficiency.
  • Figure 1 shows a circuit diagram of a prior art charging box and earphones
  • Figure 2 shows a circuit diagram of the charging box and earphones provided by the first embodiment of the present invention
  • Figure 3 shows a circuit diagram of a charging box and earphones provided by a second embodiment of the present invention
  • Figure 4 shows a circuit diagram of a charging box and earphones provided by a third embodiment of the present invention
  • Figure 5 shows a circuit diagram of a charging box and earphones provided by a fourth embodiment of the present invention.
  • Figure 6 shows a circuit diagram of a charging box and earphones provided by a fifth embodiment of the present invention.
  • Fig. 7 shows a circuit diagram of a charging box and earphones provided by a sixth embodiment of the present invention.
  • the embodiment of the present invention relates to an electronic device and a charging box for charging the electronic device.
  • the electronic device may be a TWS headset.
  • the electronic device may also be other types of electronic devices, such as smart watches, bracelets, mobile phones, etc., which are not limited in the present invention.
  • the electronic device is a TWS headset as an example to illustrate the charging box provided in the embodiment of the present invention.
  • the voltage at the input end of the charging management chip 20 must be greater than the voltage at the output end, and a certain voltage difference must be reached before the charging management chip 20 can charge the headset battery B12. This voltage difference is called This is the charging threshold of the charging management chip 20.
  • the voltage conversion chip 10 at the charging box end boosts the DC power output from the charging box battery B1 and then outputs it to the charging management chip 20 at the earphone end, so as to ensure that the voltage difference between the voltage at the input end and the voltage at the output end of the charging management chip 20 reaches The charging threshold and above are used to charge the headset battery B12 through the charging management chip 20.
  • the voltage conversion chip 10 is externally connected with a voltage dividing resistor network. Specifically, the output terminal OUT of the voltage conversion chip 10 (also referred to as a DCDC chip in the art, a DC power supply voltage conversion chip) is connected to one end of the resistor R1, and the other end of the resistor R1 is connected to the first end of the resistor R2, and the resistor R2 The first terminal is grounded. The voltage feedback terminal FB of the voltage conversion chip 10 is connected to the first terminal of the second resistor R2.
  • the voltage output by the output terminal OUT of the voltage conversion chip 10 is represented by VOUT
  • the voltage at the voltage feedback terminal FB of the voltage conversion chip 10 is represented by VFB
  • the reference voltage of the voltage conversion chip 10 is represented by VREF
  • the reference voltage of the voltage conversion chip 100 is The specific model of the voltage conversion chip 10 is related and is a parameter of the voltage conversion chip 100 itself.
  • the voltage VOUT output by the output terminal of the voltage conversion chip 10 is stabilized at VREF ⁇ (R1+R2)/R2.
  • the voltage conversion chip 10 has a built-in comparator and a switch tube. The comparator compares the voltage VFB at the voltage feedback terminal FB with the reference voltage VREF, and adjusts the switching tube on and off according to the comparison result, thereby stabilizing VOUT at VREF ⁇ (R1+R2)/R2.
  • Those skilled in the art can set a specific voltage divider resistor network according to the desired voltage value output by the voltage conversion chip 10.
  • the charging efficiency is lower.
  • the voltage of the headset battery B12 is very low, that is, the voltage at the output terminal of the charging management chip 20 is very low.
  • the voltage difference between the two ends of the charging management chip 20 will be large, resulting in very low charging efficiency. Affect user experience.
  • the solution provided by this application is to dynamically adjust the voltage value output by the charging box to the charging management chip 20 during the charging process, that is, dynamically adjust the voltage value output by the output terminal of the voltage conversion module of the charging box to charge the earphone terminal
  • the pressure difference between the two ends of the management chip 20 is maintained at a more appropriate level, thereby improving the charging efficiency.
  • a charging test is performed in advance to detect the voltage value of the headset battery B12 and the voltage drop value of the charging path during the charging process, and record the two in a corresponding manner.
  • the voltage at the output terminal of the charge management chip is basically equal to the voltage of the headset battery.
  • the voltage drop across the charge management chip the voltage output from the output terminal of the voltage conversion module-the voltage drop in the charging path-the voltage of the headset battery.
  • the voltage of the earphone battery at the same time is stored in association with the voltage drop value of the charging path and stored in the memory of the charging box.
  • the charging box can use the stored associated data to perform dynamic charging management. Refer to Figure 2-6 for further explanation.
  • the first embodiment of the present invention provides a charging box, which includes a control module 100, a charging box battery B1 and a voltage conversion module 30.
  • the charging box battery B1 is connected to the voltage conversion module 30.
  • the voltage conversion module 30 is used to convert the direct current output from the battery B1 of the charging box into a charging voltage and output it to the charging management chip 20 of the device to be charged, so as to charge the battery B12 of the device to be charged through the charging management chip 20.
  • the control module 100 is configured to adjust the charging voltage output by the voltage conversion module 30 according to the voltage of the battery B12 of the device to be charged during the process of charging the battery B12 of the device to be charged. Specifically, the control module 100 calculates the charging voltage target value, and adjusts the charging voltage output by the voltage conversion module 30 according to the charging voltage target value.
  • the control module 100 can be implemented by a processor, such as a central processing unit (CPU) or a microprocessor MCU.
  • the charging voltage target value is the sum of the current voltage value of the battery B12 of the device to be charged, the current voltage drop value of the charging path, and the charging threshold value of the charging management chip 20.
  • the charging path refers to the path from the output terminal of the voltage conversion module 30 to the input terminal of the charging management chip 20. Since the voltage of the headset battery B12 at the same time and the voltage drop value of the charging path are stored in the memory of the charging box, the charging path corresponding to the current voltage value of the battery B12 of the device to be charged can be obtained by searching. For the voltage drop value, the found voltage drop value is used as the current voltage drop value of the charging path.
  • the charging voltage output by the voltage conversion module 30 is the voltage of the charging case battery B1, or the voltage conversion module 30 performs a step-down process to make the charging voltage equal to the charging voltage target value. That is, in a specific example, if the voltage of the charging box battery B1 is greater than the charging voltage target value, the voltage conversion module 30 may directly provide the voltage of the charging box battery B1 to the earphone terminal without performing a boost operation. Or, in another specific example, if the voltage of the charging box battery B1 is greater than the charging voltage target value, the voltage conversion module 30 may perform a step-down operation to reduce the output voltage of the charging box battery B1 to the charging voltage target value before providing To the headphone end.
  • the charging voltage output by the voltage conversion module 30 is the voltage of the charging box battery.
  • the voltage conversion module 30 performs a boosting process to make the charging voltage equal to the charging voltage target value.
  • the voltage conversion module 30 can directly provide the voltage of the charging box battery B1 to the earphone terminal.
  • the voltage output from the charging box to the charging management chip is dynamically adjusted during the charging process, which can ensure that the voltage difference between the two ends of the charging management chip reaches the charging threshold and the voltage difference will not be too large, which improves the charging efficiency of the charging protection chip. Improve the overall charging efficiency.
  • the voltage conversion module includes a voltage conversion chip 200, a controlled switch 300, a positive contact T1 and a negative contact T2 for connecting with the device to be charged.
  • the voltage conversion chip 200 and the controlled switch 300 are connected in parallel, and the parallel voltage conversion chip 200 and the controlled switch 300 are connected in series between the positive electrode of the charging box battery B1 and the positive contact T1; the input terminal IN of the voltage conversion chip 200 is connected to the charging box The positive electrode of the battery B1 is connected, and the output terminal OUT is connected to the positive contact T1.
  • the control module 100 is respectively connected to the enable terminal of the voltage conversion chip 200 and the control terminal of the controlled switch 300.
  • the control module 100 is configured to output an enable signal EN1 to the enable terminal of the voltage conversion chip 200 to control the voltage conversion chip 200 to start work, and the control module 100 is configured to output a control signal EN2 to the control terminal of the controlled switch 300 to The controlled switch 300 is controlled to be turned on.
  • the negative electrode of the charging box battery B1 is connected to the negative electrode contact T2.
  • the voltage conversion module further includes a voltage dividing resistor network 401, and the voltage conversion chip 200 is externally connected to the voltage dividing resistor network 401.
  • the voltage dividing resistor network 401 includes a first resistor R11 and a second resistor R12.
  • the output terminal OUT of the voltage conversion chip 200 is connected to one end of the first resistor R11, the other end of the first resistor R11 is connected to the first end of the second resistor R12, and the second end of the second resistor R12 is grounded;
  • the voltage feedback terminal FB is connected to the first terminal of the second resistor R12.
  • the second resistor R12 is an adjustable resistor.
  • the digital signal output end of the control module 100 is connected to the resistance adjustment end of the second resistor R12, and the control module 100 outputs an I2C communication signal or an SPI communication signal to the second resistor R12.
  • the control module 100 is configured to adjust the resistance value of the second resistor R12.
  • the second resistor R12 is a digital resistor or a digital potentiometer.
  • control module 100 controls the voltage conversion chip 200 to stop working and controls the controlled switch 300 to turn on.
  • the voltage conversion module uses the controlled switch 300 to charge the earphone with the charging voltage output The voltage of the box battery.
  • the control module 100 controls the voltage conversion chip 200 to work and controls the controlled switch 300 to turn off.
  • the control module 100 adjusts the resistance value of the second resistor R12 according to the charging voltage target value to adjust the amplification factor of the reference voltage of the input voltage conversion chip 200, and the amplification factor of the reference voltage is (R11+R12)/R12.
  • the voltage conversion chip 200 performs a boost operation according to the preset reference voltage and the amplification factor of the reference voltage, so that the charging voltage is equal to the charging voltage target value.
  • the voltage output from the charging box to the charging management chip is dynamically adjusted during the charging process, which can ensure that the voltage difference between the two ends of the charging management chip reaches the charging threshold and the voltage difference will not be too large, which improves the charging efficiency of the charging protection chip. Improve the overall charging efficiency.
  • the voltage conversion module includes a voltage conversion chip 200, a controlled switch 300, a positive electrode contact T1 and a negative electrode contact T2 for connecting with the device to be charged.
  • the voltage conversion chip 200 and the controlled switch 300 are connected in parallel, and the parallel voltage conversion chip 200 and the controlled switch 300 are connected in series between the positive electrode of the charging box battery B1 and the positive contact T1;
  • the input terminal IN of the voltage conversion chip 200 is connected to the positive electrode of the charging box battery B1, and the output terminal OUT is connected to the positive electrode contact T1.
  • the control module 100 is respectively connected to the enable terminal of the voltage conversion chip 200 and the control terminal of the controlled switch 300.
  • the control module 100 is configured to output an enable signal EN1 to the enable terminal of the voltage conversion chip 200 to control the voltage conversion chip 200 to start work, and the control module 100 is configured to output a control signal EN2 to the control terminal of the controlled switch 300 to The controlled switch 300 is controlled to be turned on.
  • the negative electrode of the charging box battery B1 is connected to the negative electrode contact T2.
  • the voltage conversion module further includes a voltage dividing resistor network 402, and the voltage conversion chip 200 is externally connected to the voltage dividing resistor network 402.
  • the voltage dividing resistor network 402 includes a third resistor R21 and a fourth resistor R22.
  • the output terminal OUT of the voltage conversion chip 200 is connected to one end of the third resistor R21, the other end of the third resistor R21 is connected to the first end of the fourth resistor R22, and the second end of the fourth resistor R22 is grounded;
  • the voltage feedback terminal FB is connected to the first terminal of the fourth resistor R22.
  • the voltage conversion module also includes a resistance-capacitance network 500.
  • the RC network 500 is connected between the pulse signal output terminal of the control module 100 and the first terminal of the fourth resistor R22.
  • the RC network 500 includes a fifth resistor R23, a sixth resistor R24, and a first capacitor C21.
  • the fifth resistor R23 and the sixth resistor R24 are connected in series between the pulse signal output end of the control module 100 and the first end of the fourth resistor R22; one end of the first capacitor C21 is connected between the fifth resistor R23 and the sixth resistor R24 , The other end is grounded.
  • the resistance-capacitance network 500 may also adopt other types or other circuit structures of the resistance-capacitance network 500, which will not be described here.
  • control module 100 controls the voltage conversion chip 200 to stop working and controls the controlled switch 300 to turn on.
  • the voltage conversion module uses the controlled switch 300 to charge the earphone with the charging voltage output The voltage of the box battery.
  • the control module 100 controls the voltage conversion chip 200 to work and controls the controlled switch 300 to turn off.
  • the control module 100 outputs a PWM (Pulse Width Modulation) pulse signal to the resistance-capacitance network 500, and the resistance-capacitance network 500 converts the PWM pulse signal into a voltage signal and transmits it to the voltage dividing resistor network 402.
  • the control module 100 adjusts the duty cycle of the output PWM pulse signal according to the charging voltage target value to adjust the voltage after the PWM pulse signal conversion, thereby adjusting the current from the output terminal OUT of the voltage conversion chip 200 to the voltage divider resistor network 402, And the voltage value at the feedback terminal FB is adjusted.
  • the voltage conversion chip 200 makes the charging voltage output by the voltage conversion chip 200 equal to the charging voltage target value according to the reference voltage, the reference voltage amplification factor, the voltage after the PWM pulse signal conversion, and the values of R23 and R21.
  • the reference voltage amplification factor is (R21+R22)/R22.
  • the voltage output from the charging box to the charging management chip is dynamically adjusted during the charging process, which can ensure that the voltage difference between the two ends of the charging management chip reaches the charging threshold and the voltage difference will not be too large, which improves the charging efficiency of the charging protection chip. Improve the overall charging efficiency.
  • the voltage conversion module includes a voltage conversion chip 200, a controlled switch 300, a positive contact T1 and a negative contact T2 for connecting with the device to be charged.
  • the voltage conversion chip 200 and the controlled switch 300 are connected in parallel between the positive electrode of the charging box battery B1 and the positive contact T1.
  • the input terminal IN of the voltage conversion chip 200 is connected to the positive electrode of the charging box battery B1, and the output terminal OUT is connected to the positive electrode contact T1.
  • the control module 100 is respectively connected to the enable terminal of the voltage conversion chip 200 and the control terminal of the controlled switch 300.
  • the control module 100 is configured to output an enable signal EN1 to the enable terminal of the voltage conversion chip 200 to control the voltage conversion chip 200 to start work, and the control module 100 is configured to output a control signal EN2 to the control terminal of the controlled switch 300 to The controlled switch 300 is controlled to be turned on.
  • the negative electrode of the charging box battery B1 is connected to the negative electrode contact T2.
  • the voltage conversion module further includes a voltage dividing resistor network 403, and the voltage conversion chip 200 is externally connected to the voltage dividing resistor network 403.
  • the voltage dividing resistor network 403 includes a seventh resistor R31 and an eighth resistor R32.
  • the output terminal of the voltage conversion chip 200 is connected to one end of the seventh resistor R31, the other end of the seventh resistor R31 is connected to the first end of the eighth resistor R32, and the second end of the eighth resistor R32 is grounded; the voltage of the voltage conversion chip 200
  • the feedback terminal FB is connected to the first terminal of the eighth resistor R32.
  • the voltage conversion module further includes a ninth resistor R33 and a digital-to-analog conversion unit 600.
  • the digital adjustment signal output end of the control module 100 is connected to the input end of the digital-to-analog conversion unit 600, the output end of the digital-to-analog conversion unit 600 is connected to one end of the ninth resistor R33, and the other end of the ninth resistor R33 is connected to the eighth resistor R32. The first end is connected.
  • the control module 100 outputs a digital adjustment signal, such as an I2C communication signal or an SPI communication signal, to the digital-to-analog conversion unit 600.
  • control module 100 controls the voltage conversion chip 200 to stop working and controls the controlled switch 300 to turn on.
  • the voltage conversion module uses the controlled switch 300 to charge the earphone with the charging voltage output The voltage of the box battery.
  • the control module 100 controls the voltage conversion chip 200 to work and controls the controlled switch 300 to turn off.
  • the control module 100 outputs the digital adjustment signal to the digital-to-analog conversion unit 600, and the digital-to-analog conversion unit 600 converts the digital adjustment signal into an analog voltage signal and transmits it to the voltage divider network 403 through the ninth resistor R33.
  • the control module 100 adjusts the output digital adjustment signal according to the charging voltage target value to control the magnitude of the voltage value transmitted by the digital-to-analog conversion unit 600 to the voltage dividing resistor network 403 to adjust the current passing through the ninth resistor R33, that is, to adjust the voltage conversion
  • the current from the output terminal OUT of the chip 200 to the voltage dividing resistor network 403 and the voltage value at the feedback terminal FB are adjusted. Therefore, the voltage conversion chip 200 makes the charging voltage output by the voltage conversion chip 200 equal to the charging voltage target value according to the reference voltage, the reference voltage amplification factor, the voltage value converted and output by the digital-to-analog conversion unit 600, and the values of R33 and R31.
  • the reference voltage amplification factor is (R31+R32)/R32.
  • the voltage output from the charging box to the charging management chip is dynamically adjusted during the charging process, which can ensure that the voltage difference between the two ends of the charging management chip reaches the charging threshold and the voltage difference will not be too large, which improves the charging efficiency of the charging protection chip. Improve the overall charging efficiency.
  • the voltage conversion module includes a voltage conversion chip 200, a voltage dividing resistor network 404, a twelfth resistor R43, a digital-to-analog conversion unit 600, and a positive contact T1 and a negative contact T2 for connecting with the device to be charged.
  • the voltage dividing resistor network 404 includes a tenth resistor R41 and an eleventh resistor R42.
  • the input terminal IN of the voltage conversion chip 200 is connected to the positive electrode of the charging box battery, and the output terminal OUT is connected to the positive electrode contact T1.
  • a controlled switch is integrated between the input terminal IN and the output terminal OUT of the voltage conversion chip 200.
  • the output terminal OUT of the voltage conversion chip 200 is connected to one end of the tenth resistor R41, the other end of the tenth resistor R41 is connected to the first end of the eleventh resistor R42, and the second end of the eleventh resistor R42 is grounded; the voltage conversion chip
  • the voltage feedback terminal FB of 200 is connected to the first terminal of the eleventh resistor R42.
  • the digital adjustment signal output end of the control module 100 is connected to the input end of the digital-to-analog conversion unit 600, the output end of the digital-to-analog conversion unit 600 is connected to one end of the twelfth resistor R43, and the other end of the twelfth resistor R43 is connected to the eleventh end.
  • the first end of the resistor R42 is connected.
  • the control module 100 outputs a digital adjustment signal, such as an I2C communication signal or an SPI communication signal, to the digital-to-analog conversion unit 600.
  • the negative electrode of the battery of the charging box is connected to the negative electrode contact T2.
  • control module 100 controls the controlled switch integrated in the voltage conversion chip 200 to turn on, and the charging voltage output by the voltage conversion module to the earphone terminal through the controlled switch is the voltage of the charging box battery .
  • the control module 100 controls the controlled switch integrated in the voltage conversion chip 200 to turn off, the control module 100 outputs a digital adjustment signal to the digital-to-analog conversion unit 600, and the digital-to-analog conversion unit 600 will The digital adjustment signal is converted into an analog voltage signal and transmitted to the voltage divider resistor network 404 through the twelfth resistor R43.
  • the control module 100 adjusts the output digital adjustment signal according to the charging voltage target value to control the magnitude of the voltage value transmitted by the digital-to-analog conversion unit 600 to the voltage divider resistor network 404 to adjust the current passing through the ninth resistor R43, that is, adjust the voltage conversion
  • the current from the output terminal OUT of the chip 200 to the voltage dividing resistor network 404 and the voltage value at the feedback terminal FB are adjusted. Therefore, the voltage conversion chip 200 makes the charging voltage output by the voltage conversion chip 200 equal to the charging voltage target value according to the reference voltage, the reference voltage amplification factor, the voltage value converted and output by the digital-to-analog conversion unit 600, and the values of R43 and R41.
  • the reference voltage amplification factor is (R41+R42)/R42.
  • the control module 100 controls the controlled switch integrated in the voltage conversion chip 200 to turn off, the control module 100 outputs a digital adjustment signal to the digital-to-analog conversion unit 600, and the digital-to-analog conversion unit 600 will The digital adjustment signal is converted into an analog voltage signal and transmitted to the voltage divider resistor network 404 through the twelfth resistor R43.
  • the control module 100 adjusts the output digital adjustment signal according to the charging voltage target value to control the magnitude of the voltage value transmitted by the digital-to-analog conversion unit 600 to the voltage divider resistor network 404 to adjust the current passing through the ninth resistor R43, that is, adjust the voltage conversion
  • the current from the output terminal OUT of the chip 200 to the voltage dividing resistor network 404 and the voltage value at the feedback terminal FB are adjusted. Therefore, the voltage conversion chip 200 makes the charging voltage output by the voltage conversion chip 200 equal to the charging voltage target value according to the reference voltage, the reference voltage amplification factor, the voltage value converted and output by the digital-to-analog conversion unit 600, and the values of R43 and R41.
  • the reference voltage amplification factor is (R41+R42)/R42.
  • the voltage output from the charging box to the charging management chip is dynamically adjusted during the charging process, which can ensure that the voltage difference between the two ends of the charging management chip reaches the charging threshold and the voltage difference will not be too large, which improves the charging efficiency of the charging protection chip. Improve the overall charging efficiency.
  • the voltage conversion module includes a voltage conversion chip 200, a positive electrode contact T1 and a negative electrode contact T2 for connecting with the device to be charged.
  • the input terminal IN of the voltage conversion chip 200 is respectively connected to the control module 100 and the positive electrode of the charging box battery, and the output terminal OUT is connected to the positive electrode contact T1.
  • the voltage conversion chip 200 includes an I2C control interface or an SPI control interface.
  • the voltage conversion chip 200 can be directly connected to the control module 100.
  • the control module 100 controls the voltage conversion chip 200 to work and makes the charging voltage output by the voltage conversion chip 200 the target value of the charging voltage by outputting a digital adjustment signal.
  • An embodiment of the present invention also provides a charging box, which includes a charging box battery, a voltage conversion module, a processor, and a memory.
  • the charging box battery is connected to the voltage conversion module; the voltage conversion module is used to convert the direct current output from the charging box battery into a charging voltage and output it to the charging management chip of the device to be charged, so as to charge the battery of the device to be charged through the charging management chip.
  • the voltage conversion module can be integrated with any voltage conversion module in the above-mentioned embodiments.
  • the memory is used to store executable instructions.
  • the charging voltage output by the voltage conversion module is dynamically adjusted according to the voltage of the battery of the device to be charged.
  • the embodiment of the present invention also provides an earphone product, which includes a TWS earphone and a charging box for charging the TWS earphone.
  • the charging box includes any one of the above-mentioned embodiments.
  • control module voltage conversion module, voltage conversion chip, and charging management chip mentioned in the embodiments of the present invention may include hardware circuits and software programs.
  • control module voltage conversion module, voltage conversion chip, and charging management chip mentioned in the embodiments of the present invention
  • each control function can be implemented by instructions in related circuits. How the instructions implement specific functions is a well-known technology in the art, and it is not here. More discussion.
  • the charging box, the control module, the voltage conversion module, the voltage conversion chip, and the charging management chip mentioned in the embodiments of the present invention may include a computer-readable storage medium on which a computer program is stored. When the computer program is executed, the response is realized. Function, how the instruction realizes the specific function is a well-known technology in this field, so I won't discuss it too much here.
  • the computer-readable storage medium may be a tangible device that can hold and store instructions used by the instruction execution device.
  • the computer readable storage medium may be, for example, but not limited to, random access memory (RAM), read only memory (ROM), erasable programmable read only memory (EPROM or flash memory), static random access memory ( SRAM).

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Abstract

一种充电盒，包括控制模块(100)、充电盒电池(B1)以及电压转换模块(30)；充电盒电池(B1)与电压转换模块(30)连接；电压转换模块(30)用于将充电盒电池(B1)输出的直流电转换成充电电压并输出至待充电设备的充电管理芯片(20)，以通过充电管理芯片(20)对待充电设备的电池(B12)进行充电；控制模块(100)被配置为在对待充电设备的电池(B12)进行充电的过程中，根据待充电设备电池(B12)的电压对电压转换模块(30)输出的充电电压进行调节。

Description

一种充电盒
本申请要求于2019年8月16日提交中国专利局、申请号201910759569.9、申请名称为“一种充电盒”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
本发明涉及充电技术，更具体地，本发明涉及充电盒。
背景技术
随着芯片技术的发展，TWS(True Wireless Stereo，真无线立体声)耳机已经越来越多地进入大众视野。TWS耳机通常包括分离的左耳耳机和右耳耳机，两者之间不设有线材，彻底摆脱了线材的束缚。
目前市场上的TWS耳机，一般是利用充电盒给耳机充电。充电部分通路的原理框图如图1所示：左侧为充电盒的部分电路，右侧部分为耳机的部分电路。充电时，充电盒和耳机之间采用触点式连接(Pogo Pin)实现充电以及通信功能。具体的，充电盒电池的正极与电压转换芯片的输入端连接，电压转换芯片的输出端与充电盒的正极触点T1连接，充电盒电池的负极与充电盒的负极触点T2连接。充电管理芯片的输入端与耳机端的正极触点T11连接，输出端与耳机端电池的正极连接，耳机端电池的负极与负极触点T12连接。
当耳机正确放入充电盒时，充电盒的正极触点T1和耳机的正极触点T11连通，充电盒的负极触点T2和耳机的负极触点T12连通。充电盒的控制器通过检测电路(图1中没有示出)侦测到耳机被放入，向电压转换芯片的使能端发送控制信号，使得电压转换芯片进入工作状态，就此形成了充电通路。充电盒电池提供的直流电经电压转换芯片进行升压，再通过充电管理芯片向耳机电池充电。在向耳机电池充电的过程中，充电管理芯片起管理的作用，主要是根据耳机电池的电压调整充电电流的大小。
现有技术中，充电管理芯片的充电效率比较低，从而造成充电盒给耳机充电时整体通路效率的降低。
发明内容
本发明的目的在于提供一种充电效率更高的充电盒。
根据本发明提供了一种充电盒，包括控制模块、充电盒电池以及电压转换模块；
所述充电盒电池与所述电压转换模块连接；所述电压转换模块用于将所述充电盒电池输出的直流电转换成充电电压并输出至待充电设备的充电管理芯片，以通过充电管理芯片对待充电设备的电池进行充电；
所述控制模块被配置为在对待充电设备的电池进行充电的过程中，根据待充电设备电池的电压对所述电压转换模块输出的充电电压进行调节。
可选地或优选地，所述根据待充电设备电池的电压对所述电压转换模块输出的充电电压进行调节，包括：
计算充电电压目标值；所述充电电压目标值为待充电设备电池的当前的电压值、充电通路的当前的压降值、以及充电管理芯片的充电阈值的和值；其中，所述充电通路是指从电压转换模块的输出端到充电管理芯片的输入端之间的通路；
根据所述充电电压目标值调节所述电压转换模块输出的充电电压。
可选地或优选地，所述根据所述充电电压目标值调节所述电压转换模块输出的充电电压，包括：
如果所述充电盒电池的电压大于所述充电电压目标值，所述电压转换模块输出的充电电压为充电盒电池的电压，或者，所述电压转换模块进行降压处理使得所述充电电压等于所述充电电压目标值；
如果所述充电盒电池的电压等于所述充电电压目标值，所述电压转换模块输出的充电电压为所述充电盒电池的电压；
如果所述充电盒电池的电压小于所述充电电压目标值，所述电压转换模块进行升压处理使得所述充电电压等于所述充电电压目标值。
可选地或优选地，所述充电盒包括存储器；所述存储器中存储有所述充电通路的压降值和待充电设备电池的电压值的对应关系；
所述计算充电电压目标值，包括：查找与所述待充电设备电池的当前的电压值对应的所述充电通路的压降值作为所述充电通路的当前的压降值。
可选地或优选地，所述电压转换模块包括电压转换芯片、第一电阻、第二电阻、受控开关、用于和待充电设备连接的正极触点和负极触点；
所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
所述电压转换芯片的输出端与第一电阻的一端连接，第一电阻的另一端与第二电阻的第一端连接，第二电阻的第二端接地；电压转换芯片的电压反馈端与第二电阻的第一端连接；
所述控制模块分别与电压转换芯片的使能端、受控开关的控制端，第二电阻的阻值调节端连接；
所述充电盒电池的负极与负极触点连接。
可选地或优选地，所述控制模块被配置为：
如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节第二电阻的阻值，使得所述充电电压等于充电电压目标值。
可选地或优选地，所述第二电阻为数字电阻器或数字电位器。
可选地或优选地，所述电压转换模块包括电压转换芯片、第三电阻、第四电阻、阻容网络、受控开关、用于和待充电设备连接的正极触点和负极触点；
所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
所述电压转换芯片的输出端与第三电阻的一端连接，第三电阻的另一端与第四电阻的第一端连接，第四电阻的第二端接地；电压转换芯片的电压反馈端与第四电阻的第一端连接；
所述阻容网络连接所述控制模块的脉冲信号输出端和所述第四电阻的第一端之间；
所述控制模块分别与电压转换芯片的使能端、受控开关的控制端连接；
所述充电盒电池的负极与负极触点连接。
可选地或优选地，所述控制模块被配置为：
如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节控制模块输出的脉冲信号的占空比，使得所述充电电压等于充电电压目标值。
可选地或优选地，所述阻容网络包括第五电阻、第六电阻、以及第一电容；
所述第五电阻和第六电阻串联在所述控制模块的脉冲信号输出端和所述第四电阻的第一端之间；
所述第一电容的一端连接至第五电阻和第六电阻之间，另一端接地。
可选地或优选地，所述电压转换模块包括电压转换芯片、第七电阻、第八电阻、第九电阻、受控开关、数模转换单元、用于和待充电设备连接的正极触点和负极触点；
所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
所述电压转换芯片的输出端与第七电阻的一端连接，第七电阻的另一端与第八电阻的第一端连接，第八电阻的第二端接地；电压转换芯片的电压反馈端与第八电阻的第一端连接；
所述控制模块的数字调节信号输出端与数模转换单元的输入端连接，数模转换单元的输出端与第九电阻的一端连接，第九电阻的另一端与第八电阻的第一端连接；
所述控制模块分别与电压转换芯片的使能端、受控开关的控制端连接；
所述充电盒电池的负极与负极触点连接。
可选地或优选地，所述控制模块被配置为：
如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节所述数模转换单元输出的电压的大小，使得所述充电电压等于充电电压目标值。
可选地或优选地，所述电压转换模块包括电压转换芯片、第十电阻、第十一电阻、第十二电阻、数模转换单元、用于和待充电设备连接的正极触点和负极触点；
所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
所述电压转换芯片的输出端与第十电阻的一端连接，第十电阻的另一端与第十一电阻的第一端连接，第十一电阻的第二端接地；电压转换芯片的电压反馈端与第十一电阻的第一端连接；
所述控制模块的数字调节信号输出端与数模转换单元的输入端连接，数模转换单元的输出端与第十二电阻的一端连接，第十二电阻的另一端与第十一电阻的第一端连接；
所述控制模块与电压转换芯片的使能端连接；
所述充电盒电池的负极与负极触点连接。
可选地或优选地，所述控制模块控制电压转换芯片进行工作并且通过输出数字调节信号使得电压转换芯片输出的充电电压为充电电压目标值。
本发明实施例提供的充电盒，在充电过程中可以实时调节充电盒输出的充电电压，从而提高了充电效率。
通过以下参照附图对本发明的示例性实施例的详细描述，本发明的其它特征及其优点将会变得清楚。
附图说明
为了更清楚地说明本发明实施例的技术方案，下面将对实施例中所需要使用的附图作简单地介绍。应当理解，以下附图仅示出了本发明的某些实施例，因此不应被看作是对范围的限定。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相关的附图。
图1示出了现有技术的充电盒和耳机的电路图；
图2示出了本发明第一实施例提供的充电盒和耳机的电路图；
图3示出了本发明第二实施例提供的充电盒和耳机的电路图；
图4示出了本发明第三实施例提供的充电盒和耳机的电路图；
图5示出了本发明第四实施例提供的充电盒和耳机的电路图；
图6示出了本发明第五实施例提供的充电盒和耳机的电路图；
图7示出了本发明第六实施例提供的充电盒和耳机的电路图。
具体实施方式
现在将参照附图来详细描述本发明的各种示例性实施例。应注意到：除非另外具体说明，否则在这些实施例中阐述的部件和步骤的相对布置、数字表达式和数值不限制本发明的范围。
以下对至少一个示例性实施例的描述实际上仅仅是说明性的，决不作为对本发明及其应用或使用的任何限制。
对于相关领域普通技术人员已知的技术、方法和设备可能不作详细讨论，但在适当情况下，所述技术、方法和设备应当被视为说明书的一部分。
在这里示出和讨论的所有例子中，任何具体值应被解释为仅仅是示例性的，而不是作为限制。因此，示例性实施例的其它例子可以具有不同的值。
应注意到：相似的标号和字母在下面的附图中表示类似项，因此，一旦某一项在一个附图中被定义，则在随后的附图中不需要对其进行进一步讨论。
本发明实施例涉及电子设备和为该电子设备充电的充电盒。该电子设备可以为TWS耳机。该电子设备还可以为其它类型的电子设备，例如智能手表，手环、手机等，本发明对此不作限定。下面以电子设备为TWS耳机为例，说明本发明实施例提供的充电盒。
参见图1所示，在充电过程中，充电管理芯片20的输入端的电压要大于输出端的电压，并且要达到一定的压差，充电管理芯片20才能够向耳机电池B12进行充电，这个压差称之为充电管理芯片20的充电阈值。
现有技术中，充电盒端的电压转换芯片10将充电盒电池B1输出的直流电升压后输出至耳机端的充电管理芯片20，从而保证充电管理芯片20的输入端的电压和输出端的电压的压差达到充电阈值及以上，以实现通过充电管理芯片20对耳机电池B12进行充电。
电压转换芯片10外接有分压电阻网络。具体的，电压转换芯片10(本领域还称之为DCDC芯片，直流电源电压转换芯片)的输出端OUT与电阻R1的一端连接，电阻R1的另一端与电阻R2的第一端连接，电阻R2的第一端接地。电压转换芯片10的电压反馈端FB与第二电阻R2的第一端连接。
电压转换芯片10的输出端OUT输出的电压用VOUT表示，电压转换芯片10的电压反馈端FB处的电压用VFB表示，电压转换芯片10的参考电压用VREF表示，电压转换芯片100的参考电压与电压转换芯片10的具体型号有关，是电压转换芯片100自身的参数。
通过分压电阻网络的分压和电压反馈端的反馈，电压转换芯片10的输出端输出的电压VOUT稳定在VREF×(R1+R2)/R2。在一个具体的例子中，电压转换芯片10内置有比较器和开关管，比较器比较电压反馈端FB处的电压VFB和参考电压VREF，根据比较结果调节开关管的通断，从而将VOUT稳定在VREF×(R1+R2)/R2。本领域技术人员可以根据希望电压转换芯片10输出的电压值，来设置具体的分压电阻网络。
但是，由于充电管理芯片20两端的压差越大，充电效率越低。特别是在刚开始充电的一段时间，耳机电池B12的电压很低，即充电管理芯片20的输出端的电压很低，这时充电管理芯片20两端的压差会很大，导致充电效率很低，影响用户体验。
本申请提供的解决方案是：在充电过程中，动态地调节充电盒向充电管理芯片20输出的电压值，也就是动态调节充电盒的电压转换模块的输出端输出的电压值，将耳机端的充电管理芯片20两端的压差维持在比较合适的情况，以此提高充电效率。
在一个具体的例子中，预先进行充电测试，检测充电过程中的耳机电池B12的电压值和充电通路的压降值，将两者采用对应的方式记录下来。所述充电通路是指从电压转换模块的输出端到充电管理芯片20的输入端之间的通路。可知，充电管理芯片20的输入端的电压＝电压转换模块的输出端输出的电压－所述充电通路的压降。充电管理芯片的输出端的电压基本等于耳机电池的电压。充电管理芯片两端的压降＝电压转换模块的输出端输出的电压－所述充电通路的压降-耳机电池的电压。在充电过程中，保证充电管理芯片两端的压降等于或者略大于充电阈值，就可以在实现充电的同时还保证相对较高的充电效率。
本领域技术人员有多种方式检测充电过程中的耳机电池的电压值和所述充电通路的压降值。例如：检测耳机电池的电压和充电管理芯片的输出端至耳机电池B12之间的电流I1；本领域技术人员根据电流I1和具体的充电管理芯片，可以确定电压转换模块的输出端到充电管理芯片的输入端之间的电流I，再根据所述充电通路的内阻R，就可以获得所述充电通 路的压降值，所述充电通路的压降值＝R×I。当然，也可以直接测试在耳机处于涓流、恒流及恒压等各电压充电阶段下对应的充电通路的压降值。将同一时刻的耳机电池的电压和所述充电通路的压降值关联的存储下来，保存在充电盒的存储器中。
充电盒可以利用存储的上述关联数据，进行动态充电管理。下面参照图2-6所示，做进一步说明。
<第一实施例>
参见图2所示，本发明第一实施例提供给了一种充电盒，包括控制模块100、充电盒电池B1、电压转换模块30。
充电盒电池B1与电压转换模块30连接。电压转换模块30用于将充电盒电池B1输出的直流电转换成充电电压并输出至待充电设备的充电管理芯片20，以通过充电管理芯片20对待充电设备的电池B12进行充电。
控制模块100被配置为在对待充电设备的电池B12进行充电的过程中，根据待充电设备电池B12的电压对电压转换模块30输出的充电电压进行调节。具体地，控制模块100计算充电电压目标值，根据充电电压目标值调节电压转换模块30输出的充电电压。控制模块100可以采用处理器实现，例如中央处理器CPU或者微型处理器MCU等。
充电电压目标值为待充电设备电池B12的当前的电压值、充电通路的当前的压降值、以及充电管理芯片20的充电阈值的和值。充电通路是指从电压转换模块30的输出端到充电管理芯片20的输入端之间的通路。由于同一时刻的耳机电池B12的电压和充电通路的压降值关联的存储在充电盒的存储器中，可以通过查找的方式获得与待充电设备电池B12的当前的电压值对应的所述充电通路的压降值，将查找出的压降值作为所述充电通路的当前的压降值。
如果充电盒电池B1的电压大于充电电压目标值，电压转换模块30输出的充电电压为充电盒电池B1的电压，或者，电压转换模块30进行降压处理使得充电电压等于充电电压目标值。也就是说，在一个具体的例子中，如果充电盒电池B1的电压大于充电电压目标值，电压转换模块30可以不用进行升压操作，直接将充电盒电池B1的电压提供给耳机端。或者，在另一个具体的例子中，如果充电盒电池B1的电压大于充电电压目标值，电压转换模块30可以进行降压操作，将充电盒电池B1输出的电压降低到充电电压目标值以后再提供给耳机端。
如果充电盒电池B1的电压等于充电电压目标值，电压转换模块30输出的充电电压为充电盒电池的电压。
如果充电盒电池B1的电压小于充电电压目标值，电压转换模块30进行升压处理使得充电电压等于充电电压目标值。电压转换模块30可以直接将充电盒电池B1的电压提供给耳机端。
通过以上方式，在充电过程中动态调节充电盒向充电管理芯片输出的电压，能够保证充电管理芯片两端的压差达到充电阈值并且压差不会过大，提高了充电保护芯片的充电效率，从而提高了整体的充电效率。
<第二实施例>
参见图3所示，说明本发明第二实施例提供的充电盒。
电压转换模块包括电压转换芯片200、受控开关300、用于和待充电设备连接的正极触点T1和负极触点T2。
电压转换芯片200和受控开关300并联，并联后的电压转换芯片200和受控开关300串联在充电盒电池B1的正极和正极触点T1之间；电压转换芯片200的输入端IN与充电盒电池B1的正极连接，输出端OUT与正极触点T1连接。
控制模块100分别与电压转换芯片200的使能端和受控开关300的控制端连接。控制模块100被配置为可以向电压转换芯片200的使能端输出使能信号EN1以控制电压转换芯片200启动工作，控制模块100被配置为可以向受控开关300的控制端输出控制信号EN2以控制受控开关300导通。
充电盒电池B1的负极与负极触点T2连接。
电压转换模块还包括分压电阻网络401，电压转换芯片200外接分压电阻网络401。分压电阻网络401包括第一电阻R11和第二电阻R12。电压转换芯片200的输出端OUT与第一电阻R11的一端连接，第一电阻R11的另一端与第二电阻R12的第一端连接，第二电阻R12的第二端接地；电压转换芯片200的电压反馈端FB与第二电阻R12的第一端连接。
第二电阻R12为可调节电阻，控制模块100的数字信号输出端与第二电阻R12的阻值调节端连接，控制模块100向第二电阻R12输出I2C通信信号或者SPI通信信号。控制模块100被配置为调节第二电阻R12的阻值。在一个更具体的例子中，第二电阻R12为数字电阻器或数字电位器。
如果充电盒电池B1的电压大于等于充电电压目标值，控制模块100控制电压转换芯片200停止工作并且控制受控开关300导通，电压转换模块通过受控开关300对耳机端输出的充电电压为充电盒电池的电压。
如果充电盒电池B1的电压小于充电电压目标值，控制模块100控制电压转换芯片200工作并且控制受控开关300断开。控制模块100根据充电电压目标值调节第二电阻R12的阻值，以调整输入电压转换芯片200的参考电压的放大系数，参考电压的放大系数为(R11+R12)/R12。电压转换芯片200根据预设的参考电压与参考电压的放大系数进行升压工作，使得充电电压等于充电电压目标值。
通过以上方式，在充电过程中动态调节充电盒向充电管理芯片输出的电压，能够保证充电管理芯片两端的压差达到充电阈值并且压差不会过大，提高了充电保护芯片的充电效率，从而提高了整体的充电效率。
<第三实施例>
参见图4所示，说明本发明第三实施例提供的充电盒。
电压转换模块包括电压转换芯片200、受控开关300、用于和待充电设备连接的正极触点T1和负极触点T2。
电压转换芯片200和受控开关300并联，并联后的电压转换芯片200和受控开关300串联在充电盒电池B1的正极和正极触点T1之间；。电压转换芯片200的输入端IN与充电盒电池B1的正极连接，输出端OUT与正极触点T1连接。
控制模块100分别与电压转换芯片200的使能端和受控开关300的控制端连接。控制模块100被配置为可以向电压转换芯片200的使能端输出使能信号EN1以控制电压转换芯片200启动工作，控制模块100被配置为可以向受控开关300的控制端输出控制信号EN2以控制受控开关300导通。
充电盒电池B1的负极与负极触点T2连接。
电压转换模块还包括分压电阻网络402，电压转换芯片200外接分压电阻网络402。分压电阻网络402包括第三电阻R21和第四电阻R22。电压转换芯片200的输出端OUT与第三电阻R21的一端连接，第三电阻R21的另一端与第四电阻R22的第一端连接，第四电阻R22的第二端接地；电压转换芯片200的电压反馈端FB与第四电阻R22的第一端连接。
电压转换模块还包括阻容网络500。阻容网络500连接控制模块100的脉冲信号输出端和第四电阻R22的第一端之间。在一个具体的例子中，阻容网络500包括第五电阻R23、第六电阻R24、以及第一电容C21。第五电阻R23和第六电阻R24串联在控制模块100的脉冲信号输出端和第四电阻R22的第一端之间；第一电容C21的一端连接至第五电阻R23和第六电阻R24之间，另一端接地。阻容网络500还可以采用其它类型或者其它电路结构的阻容网络500，这里不再过多描述。
如果充电盒电池B1的电压大于等于充电电压目标值，控制模块100控制电压转换芯片200停止工作并且控制受控开关300导通，电压转换模块通过受控开关300对耳机端输出的充电电压为充电盒电池的电压。
如果充电盒电池B1的电压小于充电电压目标值，控制模块100控制电压转换芯片200工作并且控制受控开关300断开。控制模块100向阻容网络500输出PWM(Pulse Width Modulation，脉冲宽度调制)脉冲信号，阻容网络500将PWM脉冲信号转换为电压信号并传输至分压电阻网络402。控制模块100根据充电电压目标值调节输出的PWM脉冲信号的 占空比，以调节PWM脉冲信号转换后的电压大小，从而调整了电压转换芯片200的输出端OUT到分压电阻网络402的电流，以及调节了反馈端FB处的电压值。从而，电压转换芯片200根据参考电压、参考电压放大系数、PWM脉冲信号转换后的电压及R23和R21的值，使电压转换芯片200输出的充电电压等于充电电压目标值。其中，参考电压放大系数为(R21+R22)/R22。
通过以上方式，在充电过程中动态调节充电盒向充电管理芯片输出的电压，能够保证充电管理芯片两端的压差达到充电阈值并且压差不会过大，提高了充电保护芯片的充电效率，从而提高了整体的充电效率。
<第四实施例>
参见图5所示，说明本发明第四实施例提供的充电盒。
电压转换模块包括电压转换芯片200、受控开关300、用于和待充电设备连接的正极触点T1和负极触点T2。
电压转换芯片200和受控开关300并联在充电盒电池B1的正极和正极触点T1之间。电压转换芯片200的输入端IN与充电盒电池B1的正极连接，输出端OUT与正极触点T1连接。
控制模块100分别与电压转换芯片200的使能端和受控开关300的控制端连接。控制模块100被配置为可以向电压转换芯片200的使能端输出使能信号EN1以控制电压转换芯片200启动工作，控制模块100被配置为可以向受控开关300的控制端输出控制信号EN2以控制受控开关300导通。
充电盒电池B1的负极与负极触点T2连接。
电压转换模块还包括分压电阻网络403，电压转换芯片200外接分压电阻网络403。分压电阻网络403包括第七电阻R31和第八电阻R32。电压转换芯片200的输出端与第七电阻R31的一端连接，第七电阻R31的另一端与第八电阻R32的第一端连接，第八电阻R32的第二端接地；电压转换芯片200的电压反馈端FB与第八电阻R32的第一端连接。
电压转换模块还包括第九电阻R33和数模转换单元600。控制模块100的数字调节信号输出端与数模转换单元600的输入端连接，数模转换单元600的输出端与第九电阻R33的一端连接，第九电阻R33的另一端与第八电阻R32的第一端连接。控制模块100向数模转换单元600输出数字调节信号，例如I2C通信信号或者SPI通信信号。
如果充电盒电池B1的电压大于等于充电电压目标值，控制模块100控制电压转换芯片200停止工作并且控制受控开关300导通，电压转换模块通过受控开关300对耳机端输出的充电电压为充电盒电池的电压。
如果充电盒电池B1的电压小于充电电压目标值，控制模块100控制电压转换芯片200工作并且控制受控开关300断开。控制模块100向数模转换单元600输出数字调节信号，数模转换单元600将数字调节信号转换为模拟电压信号并通过第九电阻R33传输至分压电阻网络403。控制模块100根据充电电压目标值调节输出的数字调节信号，以控制数模转换单元600向分压电阻网络403传输的电压值的大小，以调节经过第九电阻R33的电流，即调整了电压转换芯片200的输出端OUT到分压电阻网络403的电流，以及调节了反馈端FB处的电压值。从而，电压转换芯片200根据参考电压、参考电压放大系数、数模转换单元600转换输出后的电压值及R33和R31的值，使电压转换芯片200输出的充电电压等于充电电压目标值。其中，参考电压放大系数为(R31+R32)/R32。
通过以上方式，在充电过程中动态调节充电盒向充电管理芯片输出的电压，能够保证充电管理芯片两端的压差达到充电阈值并且压差不会过大，提高了充电保护芯片的充电效率，从而提高了整体的充电效率。
<第五实施例>
参见图6所示，说明本发明第五实施例提供的充电盒。
电压转换模块包括电压转换芯片200、分压电阻网络404、第十二电阻R43、数模转换单元600、用于和待充电设备连接的正极触点T1和负极触点T2。分压电阻网络404包括第十电阻R41和第十一电阻R42。
电压转换芯片200的输入端IN与充电盒电池的正极连接，输出端OUT与正极触点T1连接。
在一个例子中，电压转换芯片200的输入端IN和输出端OUT之间集成有受控开关。
电压转换芯片200的输出端OUT与第十电阻R41的一端连接，第十电阻R41的另一端与第十一电阻R42的第一端连接，第十一电阻R42的第二端接地；电压转换芯片200的电压反馈端FB与第十一电阻R42的第一端连接。
控制模块100的数字调节信号输出端与数模转换单元600的输入端连接，数模转换单元600的输出端与第十二电阻R43的一端连接，第十二电阻R43的另一端与第十一电阻R42的第一端连接。控制模块100向数模转换单元600输出数字调节信号，例如I2C通信信号或者SPI通信信号。
充电盒电池的负极与负极触点T2连接。
如果充电盒电池B1的电压等于充电电压目标值，控制模块100控制电压转换芯片200内集成的受控开关导通，电压转换模块通过受控开关对耳机端输出的充电电压为充电盒电池的电压。
如果充电盒电池B1的电压小于充电电压目标值，控制模块100控制电压转换芯片200内集成的受控开关断开，控制模块100向数模转换单元600输出数字调节信号，数模转换单元600将数字调节信号转换为模拟电压信号并通过第十二电阻R43传输至分压电阻网络404。控制模块100根据充电电压目标值调节输出的数字调节信号，以控制数模转换单元600向分压电阻网络404传输的电压值的大小，以调节经过第九电阻R43的电流，即调整了电压转换芯片200的输出端OUT到分压电阻网络404的电流，以及调节了反馈端FB处的电压值。从而，电压转换芯片200根据参考电压、参考电压放大系数、数模转换单元600转换输出后的电压值及R43和R41的值，使电压转换芯片200输出的充电电压等于充电电压目标值。其中，参考电压放大系数为(R41+R42)/R42。
如果充电盒电池B1的电压大于充电电压目标值，控制模块100控制电压转换芯片200内集成的受控开关断开，控制模块100向数模转换单元600输出数字调节信号，数模转换单元600将数字调节信号转换为模拟电压信号并通过第十二电阻R43传输至分压电阻网络404。控制模块100根据充电电压目标值调节输出的数字调节信号，以控制数模转换单元600向分压电阻网络404传输的电压值的大小，以调节经过第九电阻R43的电流，即调整了电压转换芯片200的输出端OUT到分压电阻网络404的电流，以及调节了反馈端FB处的电压值。从而，电压转换芯片200根据参考电压、参考电压放大系数、数模转换单元600转换输出后的电压值及R43和R41的值，使电压转换芯片200输出的充电电压等于充电电压目标值。其中，参考电压放大系数为(R41+R42)/R42。
通过以上方式，在充电过程中动态调节充电盒向充电管理芯片输出的电压，能够保证充电管理芯片两端的压差达到充电阈值并且压差不会过大，提高了充电保护芯片的充电效率，从而提高了整体的充电效率。
<第六实施例>
参见图7所示，说明本发明第六实施例提供的充电盒。
电压转换模块包括电压转换芯片200、用于和待充电设备连接的正极触点T1和负极触点T2。
电压转换芯片200的输入端IN分别与控制模块100和充电盒电池的正极连接，输出端OUT与正极触点T1连接。
电压转换芯片200包括I2C控制接口或者SPI控制接口。电压转换芯片200可以直接与控制模块100连接。
所述控制模块100控制电压转换芯片200进行工作并且通过输出数字调节信号使得电压转换芯片200输出的充电电压为充电电压目标值。
<第七实施例>
本发明实施例还提供一种充电盒，该充电盒包括充电盒电池、电压转换模块、处理器和存储器。
充电盒电池与电压转换模块连接；电压转换模块用于将充电盒电池输出的直流电转换成充电电压并输出至待充电设备的充电管理芯片，以通过充电管理芯片对待充电设备的电池进行充电。
电压转换模块可以集成上述实施例中的任意一种电压转换模块。
该存储器用于存储可执行的指令。
所述指令被所述处理器运行时，实现根据待充电设备电池的电压对电压转换模块输出的充电电压进行动态调节。
具体的动态调节过程参见前述实施例，这里不再重复描述。
<第八实施例>
本发明实施例还提供一种耳机产品，该耳机产品包括TWS耳机和用于为TWS耳机充电的充电盒。
充电盒包括上述实施例中的任意一种充电盒。
本说明书中的各个实施例均采用递进的方式描述，各个实施例之间相同相似的部分互相参见即可，每个实施例重点说明的都是与其他实施例的不同之处，相关之处参见其它实施例的部分说明即可。
本发明实施例中提到的控制模块、电压转换模块、电压转换芯片、充电管理芯片，可以包括硬件电路和软件程序。本发明实施例中提到的控制模块、电压转换模块、电压转换芯片、充电管理芯片，各项控制功能可以由相关电路中的指令实现，指令如何实现具体的功能是本领域公知技术，这里不再过多论述。
本发明实施例中提到的充电盒、控制模块、电压转换模块、电压转换芯片、充电管理芯片，可以包括计算机可读存储介质，其上存储有计算机程序，当计算机程序被执行时实现响应的功能，指令如何实现具体的功能是本领域公知技术，这里不再过多论述。计算机可读存储介质可以是可以保持和存储由指令执行设备使用的指令的有形设备。计算机可读 存储介质例如可以是――但不限于――随机存取存储器(RAM)、只读存储器(ROM)、可擦式可编程只读存储器(EPROM或闪存)、静态随机存取存储器(SRAM)。
以上已经描述了本发明的各实施例，上述说明是示例性的，并非穷尽性的，并且也不限于所披露的各实施例。在不偏离所说明的各实施例的范围和精神的情况下，对于本技术领域的普通技术人员来说许多修改和变更都是显而易见的。本文中所用术语的选择，旨在最好地解释各实施例的原理、实际应用或对市场中的技术改进，或者使本技术领域的其它普通技术人员能理解本文披露的各实施例。本发明的范围由所附权利要求来限定。

Claims (14)

  1. 一种充电盒，其特征在于，包括控制模块、充电盒电池以及电压转换模块；
    所述充电盒电池与所述电压转换模块连接；所述电压转换模块用于将所述充电盒电池输出的直流电转换成充电电压并输出至待充电设备的充电管理芯片，以通过充电管理芯片对待充电设备的电池进行充电；
    所述控制模块被配置为在对待充电设备的电池进行充电的过程中，根据待充电设备电池的电压对所述电压转换模块输出的充电电压进行调节。
  2. 根据权利要求1所述的充电盒，其特征在于，所述根据待充电设备电池的电压对所述电压转换模块输出的充电电压进行调节，包括：
    计算充电电压目标值；所述充电电压目标值为待充电设备电池的当前的电压值、充电通路的当前的压降值、以及充电管理芯片的充电阈值的和值；其中，所述充电通路是指从电压转换模块的输出端到充电管理芯片的输入端之间的通路；
    根据所述充电电压目标值调节所述电压转换模块输出的充电电压。
  3. 根据权利要求2所述的充电盒，其特征在于，所述根据所述充电电压目标值调节所述电压转换模块输出的充电电压，包括：
    如果所述充电盒电池的电压大于所述充电电压目标值，所述电压转换模块输出的充电电压为充电盒电池的电压，或者，所述电压转换模块进行降压处理使得所述充电电压等于所述充电电压目标值；
    如果所述充电盒电池的电压等于所述充电电压目标值，所述电压转换模块输出的充电电压为所述充电盒电池的电压；
    如果所述充电盒电池的电压小于所述充电电压目标值，所述电压转换模块进行升压处理使得所述充电电压等于所述充电电压目标值。
  4. 根据权利要求2所述的充电盒，其特征在于，所述充电盒包括存储器；所述存储器中存储有所述充电通路的压降值和待充电设备电池的电压值的对应关系；
    所述计算充电电压目标值，包括：查找与所述待充电设备电池的当前的电压值对应的所述充电通路的压降值作为所述充电通路的当前的压降值。
  5. 根据权利要求1-4任一项所述的充电盒，其特征在于，所述电压转换模块包括电压转换芯片、第一电阻、第二电阻、受控开关、用于和待充电设备连接的正极触点和负极触点；
    所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
    所述电压转换芯片的输出端与第一电阻的一端连接，第一电阻的另一端与第二电阻的第一端连接，第二电阻的第二端接地；电压转换芯片的电压反馈端与第二电阻的第一端连接；
    所述控制模块分别与电压转换芯片的使能端、受控开关的控制端，第二电阻的阻值调节端连接；
    所述充电盒电池的负极与负极触点连接。
  6. 根据权利要求5所述的充电盒，其特征在于，所述控制模块被配置为：
    如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
    如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节第二电阻的阻值，使得所述充电电压等于充电电压目标值。
  7. 根据权利要求5所述的充电盒，其特征在于，所述第二电阻为数字电阻器或数字电位器。
  8. 根据权利要求1-4任一项所述的充电盒，其特征在于，所述电压转换模块包括电压转换芯片、第三电阻、第四电阻、阻容网络、受控开关、用于和待充电设备连接的正极触点和负极触点；
    所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
    所述电压转换芯片的输出端与第三电阻的一端连接，第三电阻的另一端与第四电阻的第一端连接，第四电阻的第二端接地；电压转换芯片的电压反馈端与第四电阻的第一端连接；
    所述阻容网络连接所述控制模块的脉冲信号输出端和所述第四电阻的第一端之间；
    所述控制模块分别与电压转换芯片的使能端、受控开关的控制端连接；
    所述充电盒电池的负极与负极触点连接。
  9. 根据权利要求8所述的充电盒，其特征在于，所述控制模块被配置为：
    如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
    如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节控制模块输出的脉冲信号的占空比，使得所述充电电压等于充电电压目标值。
  10. 根据权利要求8所述的充电盒，其特征在于，所述阻容网络包括第五电阻、第六电阻、以及第一电容；
    所述第五电阻和第六电阻串联在所述控制模块的脉冲信号输出端和所述第四电阻的第一端之间；
    所述第一电容的一端连接至第五电阻和第六电阻之间，另一端接地。
  11. 根据权利要求1-4任一项所述的充电盒，其特征在于，所述电压转换模块包括电压转换芯片、第七电阻、第八电阻、第九电阻、受控开关、数模转换单元、用于和待充电设备连接的正极触点和负极触点；
    所述电压转换芯片和受控开关并联，所述电压转换芯片和受控开关分别连接在充电盒电池的正极和正极触点之间；所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
    所述电压转换芯片的输出端与第七电阻的一端连接，第七电阻的另一端与第八电阻的第一端连接，第八电阻的第二端接地；电压转换芯片的电压反馈端与第八电阻的第一端连接；
    所述控制模块的数字调节信号输出端与数模转换单元的输入端连接，数模转换单元的输出端与第九电阻的一端连接，第九电阻的另一端与第八电阻的第一端连接；
    所述控制模块分别与电压转换芯片的使能端、受控开关的控制端连接；
    所述充电盒电池的负极与负极触点连接。
  12. 根据权利要求11所述的充电盒，其特征在于，所述控制模块被配置为：
    如果所述充电盒电池的电压大于等于充电电压目标值，所述控制模块控制电压转换芯片停止工作并且控制所述受控开关导通；
    如果所述充电盒电池的电压小于充电电压目标值，所述控制模块控制所述受控开关断开，所述控制模块控制电压转换芯片进行升压工作并且调节所述数模转换单元输出的电压的大小，使得所述充电电压等于充电电压目标值。
  13. 根据权利要求1-4任一项所述的充电盒，其特征在于，所述电压转换模块包括电压转换芯片、第十电阻、第十一电阻、第十二电阻、数模转换单元、用于和待充电设备连接的正极触点和负极触点；
    所述电压转换芯片的输入端与充电盒电池的正极连接，输出端与正极触点连接；
    所述电压转换芯片的输出端与第十电阻的一端连接，第十电阻的另一端与第十一电阻的第一端连接，第十一电阻的第二端接地；电压转换芯片的电压反馈端与第十一电阻的第一端连接；
    所述控制模块的数字调节信号输出端与数模转换单元的输入端连接，数模转换单元的输出端与第十二电阻的一端连接，第十二电阻的另一端与第十一电阻的第一端连接；
    所述控制模块与电压转换芯片的使能端连接；
    所述充电盒电池的负极与负极触点连接。
  14. 根据权利要求13所述的充电盒，其特征在于，
    所述控制模块控制电压转换芯片进行工作并且通过输出数字调节信号使得电压转换芯片输出的充电电压为充电电压目标值。
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