WO2014205625A1 - 带电池杆电量显示的usb充电器及其电量显示方法 - Google Patents

带电池杆电量显示的usb充电器及其电量显示方法 Download PDF

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Publication number
WO2014205625A1
WO2014205625A1 PCT/CN2013/077771 CN2013077771W WO2014205625A1 WO 2014205625 A1 WO2014205625 A1 WO 2014205625A1 CN 2013077771 W CN2013077771 W CN 2013077771W WO 2014205625 A1 WO2014205625 A1 WO 2014205625A1
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Prior art keywords
battery
voltage
circuit
charging
microcontroller
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PCT/CN2013/077771
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English (en)
French (fr)
Inventor
向智勇
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吉瑞高新科技股份有限公司
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Application filed by 吉瑞高新科技股份有限公司 filed Critical 吉瑞高新科技股份有限公司
Priority to EP13887865.7A priority Critical patent/EP3016233B1/en
Priority to PCT/CN2013/077771 priority patent/WO2014205625A1/zh
Publication of WO2014205625A1 publication Critical patent/WO2014205625A1/zh

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    • AHUMAN NECESSITIES
    • A24TOBACCO; CIGARS; CIGARETTES; SIMULATED SMOKING DEVICES; SMOKERS' REQUISITES
    • A24FSMOKERS' REQUISITES; MATCH BOXES; SIMULATED SMOKING DEVICES
    • A24F40/00Electrically operated smoking devices; Component parts thereof; Manufacture thereof; Maintenance or testing thereof; Charging means specially adapted therefor
    • A24F40/90Arrangements or methods specially adapted for charging batteries thereof
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J7/00Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/0047Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with monitoring or indicating devices or circuits
    • H02J7/0048Detection of remaining charge capacity or state of charge [SOC]

Definitions

  • the invention relates to an electronic cigarette charger, in particular to a USB charger with a battery rod power display and a power display method thereof.
  • FIG. 1 it is a schematic structural diagram of a USB charger with no charge indication in the prior art.
  • USB chargers for electronic cigarette battery rods on the market only have “charged” and “full” status indications for single or dual color LED lights.
  • Some battery rod USB chargers are simplified to the status indicator. . Therefore, the user cannot judge the specific battery rod power of the battery rod during charging, which may cause inconvenience in use. For example, a user wants to smoke while the battery rod is charging, because the charger does not have the display function of the battery rod, so the user does not know the power of the battery rod being charged. If the battery rod is only charged with 10% of the power, the user I don't know the specific charging situation. If I remove the battery rod from the charger and start smoking, I may take a few mouthfuls and it will not work. This will cause inconvenience to the user.
  • the technical problem to be solved by the present invention is to provide a USB charger with a battery rod power display and a power display method thereof, which are related to the above-mentioned defects that the battery power information in charging cannot be displayed in real time.
  • the technical solution adopted by the present invention to solve the technical problem is: constructing a USB charger with a battery rod power display for charging the electronic cigarette battery, including a USB interface, a battery unit and a charging control unit, and also including a power display unit,
  • the charging control unit is respectively connected to the USB interface, the battery unit, and the power display unit;
  • the charging control unit is configured to receive an external power supply to charge the battery unit through the USB interface, and directly or indirectly measure a voltage of the battery in the battery unit, thereby controlling the power display unit to display real-time updated power information. .
  • the charging control unit when the battery voltage is directly measured, includes: a microcontroller, a charging management circuit, and a voltage sampling circuit, wherein the battery unit includes Battery
  • the USB interface is connected to the charging management circuit, the charging management circuit is simultaneously connected to the battery and the voltage sampling circuit, the voltage sampling circuit is connected to the microcontroller, and the microcontroller is respectively connected To the power quantity display unit and the charge management circuit;
  • the microcontroller is configured to control a charging voltage output by the charging management circuit to the battery, and the microcontroller is further configured to control the voltage sampling circuit to collect a voltage of the battery, and display the battery through the power amount.
  • the unit displays the power information.
  • the charging control unit comprises: a microcontroller, an output adjustable DC-DC circuit, a current sampling circuit, and a voltage sampling. a circuit, the battery unit including a charging linear management circuit and the battery;
  • the USB interface is connected to the output adjustable DC-DC circuit, the output adjustable DC-DC circuit is simultaneously connected to the linear charge management circuit and the voltage sampling circuit, and the voltage sampling circuit is connected to the a microcontroller, the linear charge management circuit is coupled to the battery, the battery is coupled to the current sampling circuit, the current sampling circuit is coupled to the microcontroller, and the microcontroller is coupled to the a power display unit and the output adjustable DC-DC circuit;
  • the microcontroller is configured to control a charging voltage output by the output adjustable DC-DC circuit to the battery unit, and control the current sampling circuit to collect an actual charging current of the battery, thereby controlling the output. Adjusting the DC-DC circuit to output the adjusted charging voltage to the battery unit, so that the actual charging current is slightly smaller than a preset battery constant charging current, and the microcontroller is further configured to control the voltage sampling circuit to collect and adjust The subsequent charging voltage is displayed by the power amount display unit.
  • the power indicator unit includes an LED light and/or an LCD screen.
  • the power amount information is a charged level
  • the power amount display unit includes at least two LED lights for indicating the charged level.
  • the power information includes a percentage of power and/or a charged time and/or an expected full charge time
  • the power display unit includes at least one
  • the LCD screen displays the percentage of charge and/or the time that has been charged and/or is expected to be full of charge time.
  • the charge management circuit includes a charger control circuit chip, a first capacitor, and a first resistor, and the charger control circuit chip passes the first resistor Connected to the USB interface, the charger control circuit chip is further electrically connected to a charge and discharge end of the first capacitor, the charge and discharge end is electrically connected to a positive pole of the battery, and the other end of the first capacitor Connected to the negative electrode of the battery.
  • the charger control circuit chip model is VA7204, and the model of the microcontroller is SN8P2712.
  • the voltage sampling circuit includes a first voltage dividing resistor and a second voltage dividing resistor, and the first voltage dividing resistor is connected at one end to the positive pole of the battery.
  • the other end of the first voltage dividing resistor is respectively connected to one end of the second voltage dividing resistor and the PWM2 pin of the microcontroller, and the other end of the second voltage dividing resistor is grounded.
  • the model of the microcontroller is SN8P2712.
  • the output adjustable DC-DC circuit includes: a MOS transistor, a first capacitor, a first fast recovery diode, a first resistor, and a second resistor.
  • a source of the MOS transistor is connected to a cathode of the first fast recovery diode, and a cathode of the first fast recovery diode is connected to the USB interface via the first resistor;
  • the gate of the MOS transistor is electrically connected to the PWM0 pin of the microcontroller via the second resistor;
  • a drain of the MOS transistor is connected to a charge and discharge end of the first capacitor, a charge and discharge end of the first capacitor is electrically connected to the linear charge management circuit, and another end of the first capacitor is connected to the The negative pole of the battery.
  • the MOS tube is of a P type, and the model of the MOS tube is AO3401.
  • the voltage sampling circuit includes a first voltage dividing resistor and a second voltage dividing resistor, and the first voltage dividing resistor is connected to the first capacitor at one end.
  • the other end of the first voltage dividing resistor is connected to one end of the second voltage dividing resistor and the PWM2 pin of the microcontroller, and the other end of the second voltage dividing resistor is grounded.
  • the current sampling circuit includes a current sampling resistor, and one end of the current sampling resistor is connected to a PWM1 pin of the microcontroller, and the current sampling resistor The other end is connected to the negative electrode of the battery.
  • the invention also discloses a power display method of a USB charger with a battery rod power display, the charging control unit receives the charging of the battery unit by the external power source, directly or indirectly measures the battery voltage in the battery unit, and further controls the power quantity display. The unit displays the power information updated in real time.
  • the microcontroller controls the charging voltage outputted by the charging management circuit to the battery, thereby controlling the voltage sampling circuit collection station.
  • the voltage of the battery is described, and the power amount information is displayed by the power amount display unit.
  • the microcontroller controls an output adjustable DC-DC circuit to output a charging voltage to the battery unit, And controlling the current sampling circuit to collect the actual charging current of the battery, thereby controlling the output adjustable voltage of the output adjustable DC-DC circuit to the battery unit, so that the actual charging current is slightly smaller than the preset battery constant charging.
  • the current, and thus the control voltage sampling circuit collects the adjusted charging voltage, the voltage of the battery is equal to the charging voltage minus the preset difference value, and the power quantity information is displayed by the power quantity display unit.
  • the display manner of displaying the power amount information is columnar and/or fan-shaped and/or percentage display.
  • the USB charger with the battery rod power display of the present invention and the power display method thereof have the following beneficial effects: receiving the external power source to charge the battery unit through the charging control unit, and directly or indirectly measuring the battery voltage in the battery unit, thereby further
  • the control power display unit displays the power information updated in real time, so that the user can clearly understand the state of charge of the battery rod.
  • FIG. 1 is a schematic structural diagram of a USB charger with no charge indication in the prior art
  • FIG. 2 is a schematic structural view of a USB charger with a battery rod power display according to the present invention
  • FIG. 3 is a schematic structural view of a first embodiment of a USB charger with a battery rod power display according to the present invention
  • FIG. 4 is a circuit diagram of a first embodiment of a USB charger with a battery rod power display of the present invention
  • FIG. 5 is a schematic structural view of a second embodiment of a USB charger with a battery rod power display according to the present invention.
  • FIG. 6 is a circuit diagram of a first embodiment of a second embodiment of a USB charger with battery rod display in accordance with the present invention.
  • FIG. 2 it is a schematic structural diagram of a USB charger with a battery rod power display according to the present invention.
  • the USB charger with battery rod display of the present invention includes a battery unit 100, a charging control unit 200, a power display unit 300, and a USB interface 400.
  • the charging control unit 200 is connected to the USB interface 400, the battery unit 100, and the power indicator unit 300, respectively.
  • the battery unit 100 includes two battery outputs: a positive output terminal OUT+ and a negative output terminal OUT-.
  • the positive output terminal OUT+ and the negative output terminal OUT- are the positive and negative terminals when the battery unit is used as the power supply.
  • the charging control unit 200 receives the charging of the battery unit 100 by the external power source through the USB interface 400, and directly or indirectly measures the battery voltage in the battery unit 100, thereby controlling the power quantity display unit 300 to display the real-time updated power amount information.
  • the power display unit 300 includes an LED light and/or an LCD screen.
  • the power indicator unit is an LED light
  • the power information is the charged level
  • the power display unit includes at least two LED lights for indicating the charged level.
  • the power information includes a percentage of power and/or a charged time and/or an expected full charge time, and the power display unit includes at least one for displaying the percentage of power and/or the charged time and/or Or expect to be filled with an LCD screen that still requires charging time.
  • the power display unit is an LED light and an LCD screen
  • the above two may be combined, that is, the power information is the charged level and the percentage of the charge and/or the charged time and/or the expected full charge time
  • the power display unit includes at least 2 LED panels for indicating the level of charge and at least one LCD screen for displaying the percentage of charge and/or the time of charge and/or the amount of charge that is expected to be fully charged.
  • the charged level means that the battery full charge is divided into several levels (the level must be an integer), such as the N level, each level corresponds to a certain voltage range, and the corresponding level is found according to the detected voltage, and then the control is performed.
  • the number of LED lamps corresponding to the level works, for example, the detected battery voltage is within the voltage range corresponding to the m (m ⁇ N) level, then the m LED lamps are controlled to operate.
  • FIG. 3 it is a schematic structural view of a first embodiment of a USB charger with battery rod display in accordance with the present invention.
  • the USB charger of the electronic cigarette battery rod without charge management has a charging management circuit for managing the charging of the battery, so the charging voltage outputted to the battery unit is almost equal to the voltage of the internal battery, and is sampled and outputted to the battery by the voltage sampling circuit.
  • the charging voltage of the unit can get the voltage of the internal battery, and the microcontroller can calculate the battery's power according to the battery voltage.
  • the battery unit 100 includes only one battery 66, and the charging control unit 200 includes a microcontroller 20, a charging management circuit 30, and a voltage sampling circuit 40;
  • the USB interface 400 is connected to the charge management circuit 30, and the charge management circuit 30 is simultaneously connected to the battery 66 and the voltage sampling circuit 40.
  • the voltage sampling circuit 40 is connected to the microcontroller 20, and the microcontroller 20 is connected to the power display unit 400 and the charge management, respectively. Circuit 30.
  • the microcontroller 20 controls the charging voltage output by the charging management circuit 30 to the battery 66, thereby controlling the voltage sampling circuit 40 to collect the voltage of the battery 66, and displaying the power amount information by the power amount display unit 400.
  • the power indicator unit 300 is an LED light.
  • the battery information is the charged level.
  • FIG. 4 there is shown a circuit diagram of a first embodiment of a USB charger with battery rod display in accordance with the present invention.
  • the charge management circuit 30 includes a charger control circuit chip U2, a first capacitor C1, a first resistor R1, and a model of the charger control circuit chip U2 is VA7204.
  • the 4th pin of the USB interface P1 is grounded, and the 1st pin of the USB interface P1 is electrically connected to one end of the capacitor C4 via the first resistor R1, the other end of the capacitor C4 is grounded, and the electrical connection of the capacitor C4 and the first resistor R1 is The voltage acts as the voltage input signal VCC for the entire circuit.
  • the model of the microcontroller U1 is SN8P2712, the VDD pin of the microcontroller U1 is connected to the negative pole of a fast recovery diode D1, the anode of the fast recovery diode D1 is connected to the voltage input signal VCC, and the VDD pin of the microcontroller U1 is also A capacitor C3 is grounded.
  • the VSS pin of the microcontroller U1 is grounded, and the pin P4.0 of the microcontroller U1 is connected by a capacitor C7, a resistor R18,
  • the circuit is a circuit composed of an adjustable precision shunt regulator U3 of the CJ431.
  • the VCC pin of the charger control circuit chip U2 is connected to the voltage input signal VCC.
  • the BAT pin of the charger control circuit chip U2 is connected to the charge and discharge end of the first capacitor C1, the charge and discharge end of the first capacitor C1 is electrically connected to the positive pole of the battery, and the positive pole of the battery is the positive output end OUT+ of the battery unit 100, The other end of the first capacitor C1 is connected to the negative pole of the battery, and the negative pole of the battery is the negative output terminal OUT- of the battery unit 100.
  • the INT0 pin of the microcontroller U1 is connected to the LED pin of the charger control circuit chip U2.
  • the power display unit 300 includes eight blue light-emitting diodes L3 to L10 for indicating the charged level.
  • Pins P4.1 to P4.7 of the microcontroller U1 are connected to the corresponding series resistors R11 to R17, respectively, and then connected to the negative terminals of the corresponding blue LEDs L4 to L10.
  • the Xout pin of the microcontroller U1 is connected in series with the resistor R10 and connected to the cathode of the blue LED L3.
  • the anodes of the blue LEDs L3 to L10 are all connected to the voltage input signal VCC.
  • the resistance values of the resistors R10 to R17 are both 2K ⁇ .
  • the voltage sampling circuit 40 includes a first voltage dividing resistor R4 and a second voltage dividing resistor R5.
  • One end of the first voltage dividing resistor R4 is connected to the positive output terminal OUT+ of the battery unit 100, and the other end of the first voltage dividing resistor R4 is respectively connected to one end of the second voltage dividing resistor R5 and the PWM2 pin of the microcontroller U1, second The other end of the voltage dividing resistor R5 is grounded.
  • the PWM2 pin of microcontroller U1 is grounded via a capacitor C6.
  • the first voltage dividing resistor R4 and the second voltage dividing resistor R5 have the same resistance value, both being 10K ⁇ .
  • FIG. 5 it is a schematic structural view of a second embodiment of a USB charger with battery rod display in accordance with the present invention.
  • the integrated airflow sensor type electronic cigarette battery rod has its own linear charging management mode.
  • the battery can be charged only by a fixed 5V.
  • the internal battery voltage of the battery rod is not easy to obtain.
  • the charge management inside the integrated airflow sensor type electronic cigarette battery rod is linear constant current charging, in order to provide high charging efficiency, the actual charging current is controlled to be slightly smaller than the preset battery constant charging current (this method is lower than the charging current at the 5V output). 5-30%), the control method is to adjust the output voltage of the output adjustable DC-DC circuit 212 to be greater than the battery voltage inside the battery rod by a preset difference, the preset difference can be 0.1 ⁇ 0.5V, in this embodiment, a preferred 0.2V.
  • the voltage sampling circuit 300 directly samples the charging voltage output from the output adjustable DC-DC circuit 212 to the positive output terminal OUT+ of the battery unit 100, and the microcontroller 211 calculates the battery voltage accordingly, and then can calculate The battery power information.
  • the battery unit 100 includes a linear charge management circuit 77 and a battery 88, and the linear charge management circuit 77 is electrically connected to the battery 88.
  • the charging control unit 200 includes a microcontroller 50, an output adjustable DC-DC circuit 60, a current sampling circuit 70, and a voltage sampling circuit 80;
  • the USB interface 400 is connected to the output adjustable DC-DC circuit 60, the output adjustable DC-DC circuit 60 is simultaneously connected to the linear charge management circuit 77 and the voltage sampling circuit 80, and the voltage sampling circuit 80 is connected to the microcontroller 50, linear charge management Circuitry 77 is coupled to battery 88, battery 88 is coupled to current sampling circuit 70, and current sampling circuit 70 is coupled to microcontroller 50, which is coupled to power display unit 300 and output adjustable DC-DC circuit 60, respectively.
  • the current sampling circuit 70 is used to sample the actual charging current in the battery 88.
  • the microcontroller 50 controls the output adjustable DC-DC circuit 60 to output a real-time adjusted charging voltage to the battery unit 100 according to the actual charging current, and the voltage sampling circuit 80 samples the charging voltage.
  • the charging voltage is greater than the battery voltage by a predetermined difference, and the microcontroller 50 calculates the voltage of the battery 88 based on the sampled adjusted charging voltage.
  • the microcontroller 50 is used to calculate the voltage of the battery 88 on the one hand, control the display operation of the power amount information of the power display unit 300, and control the output adjustable DC-DC circuit 60 to output the charging voltage. Whether the actual charging current is slightly less than the preset battery constant charging current, and if not, controlling the output adjustable DC-DC circuit 60 to output the adjusted charging voltage such that the actual charging current is slightly less than the preset battery constant charging current.
  • the power indicator unit 300 is an LED lamp.
  • the battery information is the charged level.
  • the second embodiment has two embodiments.
  • FIG. 6 there is shown a circuit diagram of a first embodiment of a second embodiment of a USB charger with battery rod display in accordance with the present invention.
  • the output adjustable DC-DC circuit 60 includes: a MOS transistor Q1, a first capacitor C1', a first fast recovery diode D1', a first resistor R1', and a second resistor R2'. .
  • the 4th pin of the USB interface P1' is grounded, and the 1st pin of the USB interface P'1 is connected to one end of the capacitor C4' via the first resistor R1', the other end of the capacitor C4' is grounded, the capacitor C4' and the first resistor
  • the voltage at the electrical connection of R1' acts as the voltage input signal VCC for the entire circuit.
  • the model of the microcontroller U1' is SN8P2712, the VDD pin of the microcontroller U1' is connected to the negative terminal of a fast recovery diode D2, and the anode of the fast recovery diode D2 is connected to the voltage input signal VCC.
  • the VDD pin of the microcontroller U1' is also grounded via a capacitor C3', the VSS pin of the microcontroller U1' is grounded, and the pin P4.0 of the microcontroller U1' is connected by a capacitor C7' and a resistor R18'.
  • the circuit is a CJ431 adjustable precision shunt regulator source U2'.
  • the source of the MOS transistor Q1 is connected to the cathode of the first fast recovery diode D1', and the cathode of the first fast recovery diode D1' is further connected to one end of the capacitor C2' and the gate of the MOS transistor Q1 via the resistor R3', and the capacitor C2
  • the other end of the ground is connected, the anode of the first fast recovery diode D1' is connected to the voltage input signal VCC;
  • the gate of the MOS transistor Q1 is electrically connected to the PWM0 pin of the microcontroller U1' via the second resistor R2';
  • the MOS transistor Q1 The drain is connected to the charge and discharge end of the first capacitor C1', the charge and discharge end of the first capacitor C1' is electrically connected to the linear charge management circuit 77, and the charge and discharge end of the first capacitor C1' is the positive output of the battery unit 100.
  • the other end of the first capacitor C1' is connected to the negative terminal of the battery 88, and the negative terminal of the battery 88 is the negative output terminal OUT- of the battery unit 100.
  • the positive output terminal OUT+ and the negative output terminal OUT- are the positive and negative terminals when the battery unit is used as the power supply.
  • the PWM0 pin of the microcontroller U1' is used to output the PWM signal with adjustable duty cycle to control the on and off of the MOS transistor Q1, thereby controlling the charging time of the first capacitor C1' to achieve the purpose of adjusting the charging voltage in real time.
  • the MOS tube Q1 is a P type and the model number is AO3401. All of the fast recovery diodes involved in the circuit are SS14.
  • the power indicator unit 300 includes eight blue light-emitting diodes L3' to L10' for indicating the charged level.
  • the pins P4.1 to P4.7 of the microcontroller U1' are connected to the corresponding series resistors R11' to R17', respectively, and are connected to the negative electrodes of the corresponding blue light-emitting diodes L4' to L10'.
  • the pin PWM3 series resistor R10' of the microcontroller U1' is then connected to the negative terminal of the blue LED L3'.
  • the anodes of the blue light-emitting diodes L3' to L10' are all connected to the voltage input signal VCC.
  • the resistance values of the resistors R10' to R17' are both 2 k ⁇ .
  • the voltage sampling circuit 80 includes a first voltage dividing resistor R4' and a second voltage dividing resistor R5'.
  • One end of the first voltage dividing resistor R4' is connected to the charging and discharging end of the first capacitor C1', that is, the positive output terminal OUT+ of the battery unit 100.
  • the other end of the first voltage dividing resistor R4' is connected to one end of the second voltage dividing resistor R5' and the PWM2 pin of the microcontroller U1', and the other end of the second voltage dividing resistor R5' is grounded.
  • the PWM2 pin of microcontroller U1' is grounded via a capacitor C6'.
  • the first voltage dividing resistor R4' and the second voltage dividing resistor R5' have the same resistance value, and each is 10K ⁇ .
  • the current sampling circuit 70 includes a current sampling resistor R6', and the current sampling resistor R6' has a resistance of 1 k ⁇ .
  • One end of the current sampling resistor R6' is connected to the PWM1 pin of the microcontroller U1', the other end is connected to the negative terminal of the battery 88, that is, the negative output terminal OUT- of the battery unit 100, and one end of the resistor R7' is connected to the negative output terminal OUT-, The other end is grounded.
  • the PWM1 pin of microcontroller U1' is grounded via a capacitor C5.
  • the output adjustable DC-DC circuit 60 includes a digital potentiometer and a DC-DC output circuit for adjusting the resistance value of the output sample feedback resistor of the DC-DC output circuit, The DC-DC output circuit is caused to output a real-time adjusted charging voltage to the battery unit.
  • the technical means for adjusting the DC-DC output sampling feedback resistor of such a digital potentiometer is well known in the art and will not be described in detail herein.
  • the invention also provides a power display method of a USB charger with a battery rod power display: the charging control unit 200 receives the charging of the battery unit 100 by the external power source, directly or indirectly measures the battery voltage in the battery unit 100, thereby controlling the power quantity display.
  • Unit 300 displays the amount of power information updated in real time.
  • the microcontroller 20 controls the charging voltage output from the charging management circuit 30 to the battery 66, thereby controlling the voltage sampling circuit 40 to collect the voltage of the battery 66, and displaying the power amount information by the power amount display unit 300.
  • the microcontroller 50 controls the output voltage of the output adjustable DC-DC circuit 60 to the battery unit 100, and controls the current sampling circuit 70 to collect the actual charging current of the battery 88, thereby controlling the output adjustable DC-DC.
  • the circuit 60 outputs the adjusted charging voltage to the battery unit 100 such that the actual charging current is slightly less than the preset battery constant charging current, and the control voltage sampling circuit 80 collects the adjusted charging voltage.
  • the voltage of the battery 88 is equal to the charging voltage minus the preset. The difference value is displayed by the power amount display unit 300.
  • the displayed battery information is displayed in column and/or fan and/or percentage display.
  • the frequency of the voltage sampling is once every 1 s.
  • the display of the power further includes:
  • the battery power is divided into N levels, and the battery full state corresponds to the Nth level.
  • the voltage corresponding to one level is increased by one grid corresponding to the columnar or fan-shaped display, and the calculated battery voltage value is compared with the above-mentioned level voltage.
  • the battery voltage value falls within the voltage range corresponding to the nth level and the (n+1)th level, n columns are displayed corresponding to the columnar or fan shape.

Abstract

本发明公开了一种带电池杆电量显示的USB充电器及其电量显示方法,用于对电子烟电池的充电,包括USB接口(400)、电池单元(100)和充电控制单元(200),还包括电量显示单元(300),所述充电控制单元(200)分别与所述USB接口(400)、电池单元(100)、电量显示单元(300)连接;所述充电控制单元(200)用于通过所述USB接口(400)接收外接电源对所述电池单元(100)的充电,并直接或间接测量所述电池单元(100)内电池的电压,进而控制所述电量显示单元(300)显示实时更新的电量信息,便于使用者清楚的了解电池杆的充电状态。

Description

带电池杆电量显示的 USB 充电器及其电量显示方法 技术领域
本发明涉及一种电子烟充电器,尤其涉及一种带电池杆电量显示的USB充电器及其电量显示方法。
背景技术
参考图1是现有技术不带电量显示仅有充电指示的USB充电器的结构示意图。
目前市面上大部分的电子香烟电池杆的USB充电器仅仅只有单色或双色LED灯的“充电中”和“充满”的状态指示,有的电池杆USB充电器简化到连状态指示灯也没有。因此,用户没法判断出电池杆在充电中具体的电池杆电量,这样会造成使用上的不便。例如:一个用户在电池杆正在充电中想抽烟,因为充电器没有电池杆电量的显示功能,所以用户不知道正在充电的电池杆的电量,如果电池杆刚刚只充入了10%的电量,用户不知道具体的充电情况,如果从充电器上取下电池杆开始抽烟,可能抽了几口就没电不工作了,这样会给用户带来不便。
因此现有技术存在缺陷,需要改进。
发明内容
本发明要解决的技术问题在于,针对现有技术的上述不能实时显示充电中电池电量信息的缺陷,提供一种带电池杆电量显示的USB充电器及其电量显示方法。
本发明解决其技术问题所采用的技术方案是:构造一种带电池杆电量显示的USB充电器,用于对电子烟电池的充电,包括USB接口、电池单元和充电控制单元,还包括电量显示单元,
所述充电控制单元分别与所述USB接口、电池单元、电量显示单元连接;
所述充电控制单元用于通过所述USB接口接收外接电源对所述电池单元的充电,并直接或间接测量所述电池单元内电池的电压,进而控制所述电量显示单元显示实时更新的电量信息。
在本发明所述的带电池杆电量显示的USB充电器中,直接测量所述电池电压时,所述充电控制单元包括:微控制器、充电管理电路和电压采样电路,所述电池单元包括所述电池;
所述USB接口连接至所述充电管理电路,所述充电管理电路同时连接至所述电池和所述电压采样电路,所述电压采样电路连接至所述微控制器,所述微控制器分别连接至所述电量显示单元和所述充电管理电路;
其中,所述微控制器用于控制所述充电管理电路输出到所述电池的充电电压,所述微控制器还用于控制所述电压采样电路采集所述电池的电压,并通过所述电量显示单元显示所述电量信息。
在本发明所述的带电池杆电量显示的USB充电器中,间接测量所述电池电压时,所述充电控制单元包括:微控制器,输出可调DC-DC电路、电流采样电路,电压采样电路,所述电池单元包括充电线性管理电路和所述电池;
所述USB接口连接至所述输出可调DC-DC电路,所述输出可调DC-DC电路同时连接至所述线性充电管理电路和所述电压采样电路,所述电压采样电路连接至所述微控制器,所述线性充电管理电路连接至所述电池,所述电池连接至所述电流采样电路,所述电流采样电路连接至所述微控制器,所述微控制器分别连接至所述电量显示单元和所述输出可调DC-DC电路;
其中,所述微控制器用于控制所述输出可调DC-DC电路输出到所述电池单元的充电电压,并控制所述电流采样电路采集所述电池的实际充电电流,进而控制所述输出可调DC-DC电路输出调整的所述充电电压到所述电池单元,使所述实际充电电流略小于预设的电池恒定充电电流,所述微控制器还用于控制所述电压采样电路采集调整后的充电电压,并通过所述电量显示单元显示所述电量信息。
在本发明所述的带电池杆电量显示的USB充电器中,所述电量显示单元包括LED灯和/或LCD屏。
在本发明所述的带电池杆电量显示的USB充电器中,所述电量信息为已充电等级,所述电量显示单元包括至少2个用于指示所述已充电等级的LED灯。
在本发明所述的带电池杆电量显示的USB充电器中,所述电量信息包括电量百分比和/或已充电时间和/或预计充满还需充电时间,所述电量显示单元包括至少1个用于显示所述电量百分比和/或已充电时间和/或预计充满还需充电时间的LCD屏。
在本发明所述的带电池杆电量显示的USB充电器中,所述充电管理电路包括充电器控制电路芯片、第一电容、第一电阻,所述充电器控制电路芯片经所述第一电阻连接至所述USB接口,所述充电器控制电路芯片还电连接至所述第一电容的充放电端,所述充放电端电连接至所述电池的正极,所述第一电容的另一端连接至所述电池的负极。
在本发明所述的带电池杆电量显示的USB充电器中,所述充电器控制电路芯片型号为VA7204,所述微控制器的型号为SN8P2712。
在本发明所述的带电池杆电量显示的USB充电器中,所述电压采样电路包括第一分压电阻和第二分压电阻,所述第一分压电阻一端连接至所述电池的正极,所述第一分压电阻的另一端分别连接至所述第二分压电阻的一端和所述微控制器的PWM2引脚,所述第二分压电阻的另一端接地。
在本发明所述的带电池杆电量显示的USB充电器中,所述微控制器的型号为SN8P2712。
在本发明所述的带电池杆电量显示的USB充电器中,所述输出可调DC-DC电路包括:MOS管、第一电容、第一快恢复二极管、第一电阻、第二电阻,
所述MOS管的源极连接至所述第一快恢复二极管的负极,所述第一快恢复二极管的正极经所述第一电阻连接至所述USB接口;
所述MOS管的栅极经所述第二电阻电连接至所述微控制器的PWM0引脚;
所述MOS管的漏极连接至所述第一电容的充放电端,所述第一电容的充放电端电连接至所述线性充电管理电路,所述第一电容的另一端连接至所述电池的负极。
在本发明所述的带电池杆电量显示的USB充电器中,所述MOS管为P型,所述MOS管的型号为AO3401。
在本发明所述的带电池杆电量显示的USB充电器中,所述电压采样电路包括第一分压电阻和第二分压电阻,所述第一分压电阻一端连接至所述第一电容的充放电端,所述第一分压电阻的另一端分别连接至所述第二分压电阻的一端和所述微控制器的PWM2引脚,所述第二分压电阻的另一端接地。
在本发明所述的带电池杆电量显示的USB充电器中,所述电流采样电路包括电流采样电阻,所述电流采样电阻一端连接至所述微控制器的PWM1引脚,所述电流采样电阻另一端连接至所述电池的负极。
本发明还公开了一种带电池杆电量显示的USB充电器的电量显示方法,充电控制单元接收外接电源对电池单元的充电,直接或间接测量所述电池单元内的电池电压,进而控制电量显示单元显示实时更新的电量信息。
在本发明所述的带电池杆电量显示的USB充电器的电量显示方法中,直接测量所述电池电压时,微控制器控制充电管理电路输出到电池的充电电压,进而控制电压采样电路采集所述电池的电压,并通过所述电量显示单元显示所述电量信息。
在本发明所述的带电池杆电量显示的USB充电器的电量显示方法中,间接测量所述电池电压时,微控制器控制输出可调DC-DC电路输出到所述电池单元的充电电压,并控制电流采样电路采集电池的实际充电电流,进而控制所述输出可调DC-DC电路输出调整的所述充电电压到所述电池单元,使所述实际充电电流略小于预设的电池恒定充电电流,进而控制电压采样电路采集调整后的充电电压,所述电池的电压等于所述充电电压减去预设差值,并通过所述电量显示单元显示所述电量信息。
在本发明所述的带电池杆电量显示的USB充电器的电量显示方法中,显示所述电量信息的显示方式为柱状和/或扇状和/或百分比显示。
实施本发明的带电池杆电量显示的USB充电器及其电量显示方法,具有以下有益效果:通过充电控制单元接收外接电源对电池单元的充电,并直接或间接测量电池单元内的电池电压,进而控制电量显示单元显示实时更新的电量信息,便于使用者清楚的了解电池杆的充电状态。
附图说明
下面将结合附图及实施例对本发明作进一步说明,附图中:
图1是现有技术不带电量显示仅有充电指示的USB充电器的结构示意图;
图2是本发明带电池杆电量显示的USB充电器的结构示意图;
图3是本发明带电池杆电量显示的USB充电器的第一实施例的结构示意图;
图4是本发明带电池杆电量显示的USB充电器的第一实施例的电路示意图;
图5是本发明带电池杆电量显示的USB充电器的第二实施例的结构示意图;
图6是本发明带电池杆电量显示的USB充电器的第二实施例的第一实施方式的电路示意图。
具体实施方式
为了对本发明的技术特征、目的和效果有更加清楚的理解,现对照附图详细说明本发明的具体实施方式。
参考图2,是本发明带电池杆电量显示的USB充电器的结构示意图。
本发明带电池杆电量显示的USB充电器包括电池单元100、充电控制单元200、电量显示单元300、USB接口400,
充电控制单元200分别与USB接口400、电池单元100、电量显示单元300连接。
电池单元100包括两个电池输出端:正输出端OUT+和负输出端OUT-。正输出端OUT+和负输出端OUT-即为电池单元作为供电电源时候的正负极。
充电控制单元200通过USB接口400接收外接电源对电池单元100的充电,并直接或间接测量电池单元100内的电池电压,进而控制电量显示单元300显示实时更新的电量信息。
电量显示单元300包括LED灯和/或LCD屏。
如果电量显示单元为LED灯,则电量信息为已充电等级,电量显示单元包括至少2个用于指示已充电等级的LED灯。
如果电量显示单元为LCD屏,则电量信息包括电量百分比和/或已充电时间和/或预计充满还需充电时间,电量显示单元包括至少1个用于显示电量百分比和/或已充电时间和/或预计充满还需充电时间的LCD屏。
如果电量显示单元为LED灯和LCD屏,则结合上述两个即可,即电量信息为已充电等级和电量百分比和/或已充电时间和/或预计充满还需充电时间,电量显示单元包括至少2个用于指示已充电等级的LED灯和至少1个用于显示电量百分比和/或已充电时间和/或预计充满还需充电时间的电量信息的LCD屏。
已充电等级是指把电池满充划分为几个等级(等级必须为整数),比如N等级,每个等级对应一定的电压范围,根据本次检测到的电压找到相应的等级,然后控制与该等级对应的数量的LED灯工作,比如检测到的电池电压在m(m<N)等级所对应的电压范围之内,则控制m个LED灯工作。
参考图3,是本发明带电池杆电量显示的USB充电器的第一实施例的结构示意图。
无充电管理的电子烟电池杆的USB充电器自带有对电池的充电进行管理的充电管理电路,所以输出到电池单元的充电电压和内部电池的电压几乎相等,用电压采样电路采样输出到电池单元的充电电压就可以得到内部电池的电压,微控制器根据电池电压就可以计算电池的电量。
具体的,第一实施例中,电池单元100仅包括一电池66,充电控制单元200包括微控制器20、充电管理电路30、电压采样电路40;
USB接口400连接至充电管理电路30,充电管理电路30同时连接至电池66和电压采样电路40,电压采样电路40连接至微控制器20,微控制器20分别连接至电量显示单元400和充电管理电路30。
微控制器20控制充电管理电路30输出到电池66的充电电压,进而控制电压采样电路40采集电池66的电压,并通过电量显示单元400显示电量信息。
本实施例中,电量显示单元300为LED灯。电量信息为已充电等级。
参考图4,是本发明带电池杆电量显示的USB充电器的第一实施例的电路示意图。
第一实施例中,充电管理电路30包括充电器控制电路芯片U2、第一电容C1、第一电阻R1,充电器控制电路芯片U2的型号为VA7204。
USB接口P1的4号引脚接地,USB接口P1的1号引脚经第一电阻R1电连接至电容C4的一端,电容C4的另一端接地,电容C4与第一电阻R1的电连接处的电压作为整个电路的电压输入信号VCC。
微控制器U1的型号为SN8P2712,微控制器U1的VDD引脚连接至一快恢复二极管D1的负极,快恢复二极管D1的正极连接至电压输入信号VCC,微控制器U1的VDD引脚还经一电容C3接地。微控制器U1的VSS引脚接地,微控制器U1的引脚P4.0连接有由一电容C7、电阻R18、 型号为CJ431的可调式精密并联稳压源U3构成的电路。充电器控制电路芯片U2的VCC引脚连接至电压输入信号VCC。充电器控制电路芯片U2的BAT引脚连接至第一电容C1的充放电端,第一电容C1的充放电端电连接至电池的正极,电池的正极即为电池单元100的正输出端OUT+,第一电容C1的另一端连接至电池的负极,电池的负极即为电池单元100的负输出端OUT-。微控制器U1的INT0引脚连接至充电器控制电路芯片U2的LED引脚。
电量显示单元300包括8个用于指示已充电等级的蓝色发光二极管L3~L10。
微控制器U1的引脚P4.1~P4.7分别与对应的串联电阻R11~R17连接后连接至对应的蓝色发光二极管L4~L10的负极。微控制器U1的Xout引脚串联电阻R10后连接至蓝色发光二极管L3的负极。蓝色发光二极管L3~L10的正极均连接至电压输入信号VCC。电阻R10~R17的电阻值均为2KΩ。
电压采样电路40包括第一分压电阻R4和第二分压电阻R5。第一分压电阻R4一端连接至电池单元100的正输出端OUT+,第一分压电阻R4的另一端分别连接至第二分压电阻R5的一端和微控制器U1的PWM2引脚,第二分压电阻R5的另一端接地。微控制器U1的PWM2引脚经一电容C6接地。本实施例中,第一分压电阻R4和第二分压电阻R5阻值相同,均为10KΩ。
参考图5,是本发明带电池杆电量显示的USB充电器的第二实施例的结构示意图。
集成气流传感器型电子烟电池杆,其内部自带线性充电管理模式,外部只需要给固定的5V就可以给这种电池杆充电了,这种电池杆的内部电池的电压不容易得到。由于集成气流传感器型电子烟电池杆内部的充电管理是线性恒流充电,为提供高充电效率,会控制实际充电电流略小于预设的电池恒定充电电流(这种方法比5V输出时的充电电流小5-30%),控制的方法就是通过调整输出可调DC-DC电路212所输出的充电电压,使其比电池杆内部的电池电压大一预设差值,预设差值可以为0.1~0.5V,本实施例中,优选的0.2V。因此,如果要采集电池的电压,可以通过检测充电电压,再减去0.2V,即可得到电池的电压,也就可以计算出电池的电量。本实施例就是通过电压采样电路300,直接采样从输出可调DC-DC电路212输出到电池单元100的正输出端OUT+的充电电压,微控制器211据此计算出电池电压,进而就可以计算出电池的电量信息。
具体的,第二实施例中,电池单元100包括线性充电管理电路77和电池88,线性充电管理电路77电连接至电池88。
充电控制单元200包括微控制器50、输出可调DC-DC电路60、电流采样电路70、电压采样电路80;
USB接口400连接至输出可调DC-DC电路60,输出可调DC-DC电路60同时连接至线性充电管理电路77和电压采样电路80,电压采样电路80连接至微控制器50,线性充电管理电路77连接至电池88,电池88连接至电流采样电路70,电流采样电路70连接至微控制器50,微控制器50分别连接至电量显示单元300和输出可调DC-DC电路60。
电流采样电路70用于采样电池88中的实际充电电流,微控制器50根据实际充电电流控制输出可调DC-DC电路60输出实时调整的充电电压到电池单元100,电压采样电路80采样充电电压,充电电压比电池电压大一预设差值,微控制器50根据采样到的调整后的充电电压计算电池88的电压。
第二实施例中,微控制器50一方面用于计算电池88的电压,控制电量显示单元300的电量信息的显示工作,另一方面控制输出可调DC-DC电路60输出充电电压,并判断实际充电电流是否略小于预设的电池恒定充电电流,若否,则控制输出可调DC-DC电路60输出调整的充电电压使实际充电电流略小于预设的电池恒定充电电流。
第二实施例中,电量显示单元300为LED灯。电量信息为已充电等级。
第二实施例有两种实施方式。
参考图6,是本发明带电池杆电量显示的USB充电器的第二实施例的第一实施方式的电路示意图。
第二实施例的第一实施方式中,输出可调DC-DC电路60包括:MOS管Q1、第一电容C1’、第一快恢复二极管D1’、第一电阻R1’、第二电阻R2’。
USB接口P1’的4号引脚接地,USB接口P’1的1号引脚经第一电阻R1’连接至电容C4’的一端,电容C4’的另一端接地,电容C4’与第一电阻R1’的电连接处的电压作为整个电路的电压输入信号VCC。
微控制器U1’的型号为SN8P2712,微控制器U1’的VDD引脚连接至一快恢复二极管D2的负极,快恢复二极管D2的正极连接至电压输入信号VCC。微控制器U1’的VDD引脚还经一电容C3’接地,微控制器U1’的VSS引脚接地,微控制器U1’的引脚P4.0连接有由一电容C7’、电阻R18’、 型号为CJ431的可调式精密并联稳压源U2’构成的电路。
MOS管Q1的源极连接至第一快恢复二极管D1’的负极,第一快恢复二极管D1’的负极还经电阻R3’后连接至电容C2’的一端和MOS管Q1的栅极,电容C2’的另一端接地,第一快恢复二极管D1’的正极连接至电压输入信号VCC;MOS管Q1的栅极经第二电阻R2’电连接至微控制器U1’的PWM0引脚;MOS管Q1的漏极连接至第一电容C1’的充放电端,第一电容C1’的充放电端电连接至线性充电管理电路77,第一电容C1’的充放电端即为电池单元100的正输出端OUT+,第一电容C1’的另一端连接至电池88的负极,电池88的负极即为电池单元100的负输出端OUT-。正输出端OUT+和负输出端OUT-即为电池单元作为供电电源时候的正负极。
微控制器U1’的PWM0引脚用于输出占空比可调的PWM信号来控制MOS管Q1的导通和截止,进而控制第一电容C1’的充电时间,达到实时调整充电电压的目的。
MOS管Q1为P型,型号为AO3401。电路中所涉及到的所有的快恢复二极管的型号均为SS14。
电量显示单元300包括8个用于指示已充电等级的蓝色发光二极管L3’~L10’。
微控制器U1’的引脚P4.1~P4.7分别与对应的串联电阻R11’~R17’连接后连接至对应的蓝色发光二极管L4’~L10’的负极。微控制器U1’的引脚PWM3串联电阻R10’后连接至蓝色发光二极管L3’的负极。蓝色发光二极管L3’~L10’的正极均连接至电压输入信号VCC。电阻R10’~R17’的电阻值均为2KΩ。
电压采样电路80包括第一分压电阻R4’和第二分压电阻R5’,第一分压电阻R4’一端连接至第一电容C1’的充放电端,即电池单元100的正输出端OUT+,第一分压电阻R4’的另一端分别连接至第二分压电阻R5’的一端和微控制器U1’的PWM2引脚,第二分压电阻R5’的另一端接地。微控制器U1’的PWM2引脚经一电容C6’接地。本实施例中,第一分压电阻R4’和第二分压电阻R5’阻值相同,均为10KΩ。
电流采样电路70包括一电流采样电阻R6’,电流采样电阻R6’阻值为1KΩ。电流采样电阻R6’一端连接至微控制器U1’的PWM1引脚,另一端连接至电池88的负极,即电池单元100的负输出端OUT-,电阻R7’一端连接至负输出端OUT-,另一端接地。微控制器U1’的PWM1引脚经一电容C5接地。
第二实施例的第二实施方式中,输出可调DC-DC电路60包括数字电位器和DC-DC输出电路,数字电位器用于调节DC-DC输出电路的输出采样反馈电阻的电阻值,进而使DC-DC输出电路输出实时调整的充电电压到电池单元。这种数字电位器调整DC-DC输出采样反馈电阻的技术手段为本领域的公知技术,此处不做详述。
本发明还提供一种带电池杆电量显示的USB充电器的电量显示方法:充电控制单元200接收外接电源对电池单元100的充电,直接或间接测量电池单元100内的电池电压,进而控制电量显示单元300显示实时更新的电量信息。
直接测量电池电压时,微控制器20控制充电管理电路30输出到电池66的充电电压,进而控制电压采样电路40采集电池66的电压,并通过电量显示单元300显示电量信息。
间接测量电池电压时,微控制器50控制输出可调DC-DC电路60输出到电池单元100的充电电压,并控制电流采样电路70采集电池88的实际充电电流,进而控制输出可调DC-DC电路60输出调整的充电电压到电池单元100,使实际充电电流略小于预设的电池恒定充电电流,进而控制电压采样电路80采集调整后的充电电压,电池88的电压等于充电电压减去预设差值,并通过电量显示单元300显示电量信息。
显示电量信息的显示方式为柱状和/或扇状和/或百分比显示。
其中,电压采样的频率为每1s采样一次。
电量的显示进一步包括:
将电池的电量均分为N个等级,电池充满状态对应第N等级,一个等级所对应的电压对应柱状或扇状的显示增加一格,将计算的电池电压值,与上述等级电压进行对比,若电池电压值落在第n等级和第(n+1)等级多对应的电压范围之内,则对应柱状或扇状显示n格。
上面结合附图对本发明的实施例进行了描述,但是本发明并不局限于上述的具体实施方式,上述的具体实施方式仅仅是示意性的,而不是限制性的,本领域的普通技术人员在本发明的启示下,在不脱离本发明宗旨和权利要求所保护的范围情况下,还可做出很多形式,这些均属于本发明的保护之内。

Claims (1)

1、一种带电池杆电量显示的USB充电器,用于对电子烟电池的充电,包括USB接口(400)、电池单元(100)和充电控制单元(200),其特征在于,还包括电量显示单元(300),
所述充电控制单元(200)分别与所述USB接口(400)、电池单元(100)、电量显示单元(300)连接;
所述充电控制单元(200)用于通过所述USB接口(400)接收外接电源对所述电池单元(100)的充电,并直接或间接测量所述电池单元(100)内电池的电压,进而控制所述电量显示单元(300)显示实时更新的电量信息。
2、根据权利要求1所述的带电池杆电量显示的USB充电器,其特征在于,直接测量所述电池电压时,所述充电控制单元(200)包括:微控制器(20)、充电管理电路(30)和电压采样电路(40),所述电池单元(100)包括所述电池(66);
所述USB接口(400)连接至所述充电管理电路(30),所述充电管理电路(30)同时连接至所述电池(66)和所述电压采样电路(40),所述电压采样电路(40)连接至所述微控制器(20),所述微控制器(20)分别连接至所述电量显示单元(300)和所述充电管理电路(30);
其中,所述微控制器(20)用于控制所述充电管理电路(30)输出到所述电池(66)的充电电压,所述微控制器(20)还用于控制所述电压采样电路(40)采集所述电池(66)的电压,并通过所述电量显示单元(300)显示所述电量信息。
3、根据权利要求1所述的带电池杆电量显示的USB充电器,其特征在于,间接测量所述电池电压时,所述充电控制单元(200)包括:微控制器(50),输出可调DC-DC电路(60)、电流采样电路(70),电压采样电路(80),所述电池单元(100)包括充电线性管理电路(77)和所述电池(88);
所述USB接口(400)连接至所述输出可调DC-DC电路(60),所述输出可调DC-DC电路(60)同时连接至所述线性充电管理电路(77)和所述电压采样电路(80),所述电压采样电路(80)连接至所述微控制器(50),所述线性充电管理电路(77)连接至所述电池(88),所述电池(88)连接至所述电流采样电路(70),所述电流采样电路(70)连接至所述微控制器(50),所述微控制器(50)分别连接至所述电量显示单元(300)和所述输出可调DC-DC电路(60);
其中,所述微控制器(50)用于控制所述输出可调DC-DC电路(60)输出到所述电池单元(100)的充电电压,并控制所述电流采样电路(70)采集所述电池(88)的实际充电电流,进而控制所述输出可调DC-DC电路(60)输出调整的所述充电电压到所述电池单元(100),使所述实际充电电流略小于预设的电池恒定充电电流,所述微控制器(50)还用于控制所述电压采样电路(80)采集调整后的充电电压,并通过所述电量显示单元(300)显示所述电量信息。
4、根据权利要求1-3任一所述的带电池杆电量显示的USB充电器,其特征在于,所述电量显示单元包括LED灯和/或LCD屏。
5、根据权利要求1-3任一所述的带电池杆电量显示的USB充电器,其特征在于,所述电量信息为已充电等级,所述电量显示单元包括至少2个用于指示所述已充电等级的LED灯。
6、根据权利要求1-3任一所述的带电池杆电量显示的USB充电器,其特征在于,所述电量信息包括电量百分比和/或已充电时间和/或预计充满还需充电时间,所述电量显示单元包括至少1个用于显示所述电量百分比和/或已充电时间和/或预计充满还需充电时间的LCD屏。
7、根据权利要求2所述的带电池杆电量显示的USB充电器,其特征在于,所述充电管理电路包括充电器控制电路芯片(U2)、第一电容(C1)、第一电阻(R1),所述充电器控制电路芯片(U2)经所述第一电阻(R1)连接至所述USB接口(P1),所述充电器控制电路芯片(U2)还电连接至所述第一电容(C1)的充放电端,所述充放电端电连接至所述电池(66)的正极,所述第一电容(C1)的另一端连接至所述电池(66)的负极。
8、根据权利要求7所述的带电池杆电量显示的USB充电器,其特征在于,所述充电器控制电路芯片(U2)型号为VA7204,所述微控制器(U1)的型号为SN8P2712。
9、根据权利要求8所述的带电池杆电量显示的USB充电器,其特征在于,所述电压采样电路(40)包括第一分压电阻(R4)和第二分压电阻(R5),所述第一分压电阻(R4)一端连接至所述电池(66)的正极,所述第一分压电阻(R4)的另一端分别连接至所述第二分压电阻(R5)的一端和所述微控制器(U1)的PWM2引脚,所述第二分压电阻(R5)的另一端接地。
10、根据权利要求3所述的带电池杆电量显示的USB充电器,其特征在于,所述微控制器(U1’)的型号为SN8P2712。
11、根据权利要求10所述的带电池杆电量显示的USB充电器,其特征在于,所述输出可调DC-DC电路包括:MOS管(Q1)、第一电容(C1’)、第一快恢复二极管(D1’)、第一电阻(R1’)、第二电阻(R2’),
所述MOS管(Q1)的源极连接至所述第一快恢复二极管(D1’)的负极,所述第一快恢复二极管(D1’)的正极经所述第一电阻(R1’)连接至所述USB接口(P1’);
所述MOS管(Q1)的栅极经所述第二电阻(R2’)电连接至所述微控制器(U1’)的PWM0引脚;
所述MOS管(Q1)的漏极连接至所述第一电容(C1’)的充放电端,所述第一电容(C1’)的充放电端电连接至所述线性充电管理电路(77),所述第一电容(C1’)的另一端连接至所述电池(88)的负极。
12、根据权利要求11所述的带电池杆电量显示的USB充电器,其特征在于,所述MOS管(Q1)为P型,所述MOS管(Q1)的型号为AO3401。
13、根据权利要求12所述的带电池杆电量显示的USB充电器,其特征在于,所述电压采样电路(80)包括第一分压电阻(R4’)和第二分压电阻(R5’),所述第一分压电阻(R4’)一端连接至所述第一电容(C1’)的充放电端,所述第一分压电阻(R4’)的另一端分别连接至所述第二分压电阻(R5’)的一端和所述微控制器(U1’)的PWM2引脚,所述第二分压电阻(R5’)的另一端接地。
14、根据权利要求10所述的带电池杆电量显示的USB充电器,其特征在于,所述电流采样电路(70)包括电流采样电阻(R6’),所述电流采样电阻(R6’)一端连接至所述微控制器(U1’)的PWM1引脚,所述电流采样电阻(R6’)另一端连接至所述电池(88)的负极。
15、一种带电池杆电量显示的USB充电器的电量显示方法,其特征在于,充电控制单元(200)接收外接电源对电池单元(100)的充电,直接或间接测量所述电池单元(100)内的电池电压,进而控制电量显示单元(300)显示实时更新的电量信息。
16、根据权利要求15所述的带电池杆电量显示的USB充电器的电量显示方法,其特征在于,直接测量所述电池电压时,微控制器(20)控制充电管理电路(30)输出到电池(66)的充电电压,进而控制电压采样电路(40)采集所述电池(66)的电压,并通过所述电量显示单元(300)显示所述电量信息。
17、根据权利要求15所述的带电池杆电量显示的USB充电器的电量显示方法,其特征在于,间接测量所述电池电压时,微控制器(50)控制输出可调DC-DC电路(60)输出到所述电池单元(100)的充电电压,并控制电流采样电路(70)采集电池(88)的实际充电电流,进而控制所述输出可调DC-DC电路(60)输出调整的所述充电电压到所述电池单元(100),使所述实际充电电流略小于预设的电池恒定充电电流,进而控制电压采样电路(80)采集调整后的充电电压,电池(88)的电压等于所述充电电压减去预设差值,并通过所述电量显示单元(300)显示所述电量信息。
18、根据权利要求15所述的带电池杆电量显示的USB充电器的电量显示方法,其特征在于,显示所述电量信息的显示方式为柱状和/或扇状和/或百分比显示。
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