WO2020098634A1 - 电池充满检测电路及其检测电池充满的方法、电子装置 - Google Patents

电池充满检测电路及其检测电池充满的方法、电子装置 Download PDF

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Publication number
WO2020098634A1
WO2020098634A1 PCT/CN2019/117469 CN2019117469W WO2020098634A1 WO 2020098634 A1 WO2020098634 A1 WO 2020098634A1 CN 2019117469 W CN2019117469 W CN 2019117469W WO 2020098634 A1 WO2020098634 A1 WO 2020098634A1
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Prior art keywords
preset
duration
battery
instruction
equal
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PCT/CN2019/117469
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English (en)
French (fr)
Inventor
程剑涛
高桂华
王云松
吴传奎
董渊
黄建刚
Original Assignee
上海艾为电子技术股份有限公司
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Priority claimed from CN201811345257.5A external-priority patent/CN109212423B/zh
Priority claimed from CN201811345786.5A external-priority patent/CN109212424B/zh
Application filed by 上海艾为电子技术股份有限公司 filed Critical 上海艾为电子技术股份有限公司
Publication of WO2020098634A1 publication Critical patent/WO2020098634A1/zh

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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382—Arrangements for monitoring battery or accumulator variables, e.g. SoC
    • G01R31/3835—Arrangements for monitoring battery or accumulator variables, e.g. SoC involving only voltage measurements

Definitions

  • the invention relates to the technical field of battery charging, and more particularly, to a battery full detection circuit, a method for detecting the battery full, and an electronic device.
  • Lithium-ion batteries have been widely used in electric vehicles, energy storage power stations, smart phones, and notebook computers due to their advantages of high voltage, high energy density, high safety, and low self-discharge rate.
  • the charging process of a lithium ion battery can be divided into four stages: trickle charging stage (pre-charging stage), constant current charging stage, constant voltage charging stage, and charging termination stage.
  • trickle charging stage first use trickle charging to pre-charge the fully discharged battery (recovery charging).
  • the trickle charge is used when the battery voltage is lower than about 3V.
  • the trickle charge current is one-tenth of the constant current charge current. Taking a constant charging current equal to 1A as an example, the trickle charging current is 100mA.
  • the charging current is increased to perform constant current charging.
  • the constant current charging current is between 0.2C and 1.0C.
  • the battery voltage gradually increases with the constant current charging process.
  • the voltage set by a single battery is 3.0V to 4.2V.
  • the constant voltage charging phase when the battery voltage rises to 4.2V, the constant current charging ends and the constant voltage charging phase begins.
  • the current is based on the saturation of the battery cell. As the charging process continues, the charging current gradually decreases from the maximum value. When it decreases to 0.01C, the charging is considered to be terminated.
  • C is a method of expressing the nominal current of the battery against the current. If the battery has a capacity of 1000mAh, 1C is the charging current of 1000mA.
  • minimum charge current judgment method monitors the charging current during the constant voltage charging stage, and terminates charging when the charging current decreases to 0.02C to 0.07C.
  • the timer judgment method counts the time from the beginning of the constant voltage charging stage, and the charging process is terminated after two hours of continuous charging.
  • the present invention provides a battery fullness detection circuit and a method and electronic device for detecting the battery fullness, in order to solve the problem that the prior art cannot accurately determine whether the battery is full.
  • the present invention provides the following technical solutions:
  • a battery full detection circuit including a first resistor, an operational amplifier, a comparator, a second resistor and a judgment circuit;
  • the first resistor is connected in series between the battery and the charging circuit that charges the battery
  • the first input terminal of the operational amplifier is connected to the first terminal of the first resistor
  • the second input terminal of the operational amplifier is connected to the second terminal of the first resistor
  • the operational amplifier is used to Amplify the voltage across the first resistor, and output the amplified voltage to the comparator;
  • the first end of the second resistor is connected to the output end of the operational amplifier, and the second end of the second resistor is grounded;
  • the first input terminal of the comparator is connected to the output terminal of the operational amplifier, the second input terminal of the comparator is connected to the reference voltage terminal, and the comparator is used to carry out the amplified voltage to the reference voltage Compare, and when the amplified voltage is less than the reference voltage, output a control command to the judgment circuit;
  • the input terminal of the judging circuit is connected to the output terminal of the comparator, the judging circuit is used to judge whether the duration of the control command is equal to the preset duration, and if it is equal to or greater than the preset duration, then determine the control command Valid, and determine whether the number of valid control instructions received within a preset time period is greater than the preset number or whether the number of consecutively received valid control instructions is greater than the preset number, if greater than or equal to the preset number of times , It is determined that the battery is fully charged, and if it is less than the preset number of times, it is determined that the battery is not fully charged.
  • the judgment circuit is further configured to send a disconnection instruction to the charging circuit when it is judged that the battery is fully charged, so as to control the charging circuit to stop charging the battery.
  • the judgment circuit includes a time window timer, a first counter, a second counter, and a judgment circuit;
  • the input terminal of the time window timer is connected to the output terminal of the comparator, and is used to start timing after the comparator outputs the control instruction, and output the first after the timing duration reaches the preset time period.
  • the input terminal of the first counter is connected to the output terminal of the comparator, and is used to determine whether the duration of the control command is equal to the preset duration after the comparator outputs the control command, and if it is equal to or greater than the Set the duration and output the second instruction to the second counter;
  • the input terminal of the second counter is connected to the output terminal of the first counter, and is used to increase the count value by 1 after receiving the second instruction and output the count result to the decision circuit;
  • the decision circuit is connected to the output terminal of the time window timer and the output terminal of the second counter, and is used to determine whether the counting result of the second counter is greater than a preset after receiving the first instruction The number of times, if greater than or equal to the preset number of times, send a disconnection instruction to the charging circuit.
  • the judgment circuit includes a first counter and a second counter
  • the input terminal of the first counter is connected to the output terminal of the comparator, the output terminal of the first counter is connected to the input terminal of the second counter, and the output terminal of the second counter is connected to the charging circuit Connected
  • the first counter is used to determine whether the duration of the control instruction is equal to the preset duration, if it is equal to or greater than the preset duration, it is determined that the control instruction is valid, and the first instruction is output to the second counter;
  • the second counter is used to increase the count value by 1 after receiving the first instruction, and determine whether the number of valid control instructions continuously received is greater than a preset number of times, and if greater than or equal to the preset number of times, Then, a disconnection instruction is sent to the charging circuit.
  • the judgment circuit is further configured to adjust the values of the preset duration, the preset time period and the preset number of times according to the received first adjustment instruction, and according to the received second adjustment instruction To adjust the value of the preset duration and the preset number of times.
  • An electronic device includes a battery and a charging chip, the charging chip includes a charging circuit and a battery full detection circuit;
  • the charging circuit is used to charge the battery
  • the battery full detection circuit is the battery full detection circuit according to any one of the above.
  • it also includes a main controller
  • the main controller is connected to a judgment circuit of the battery fullness detection circuit, and is used to input a first adjustment instruction or a second adjustment instruction to the judgment circuit according to the power consumption of the electronic device, according to the first
  • the adjustment instruction adjusts the values of the preset duration, the preset time period, and the preset number of times, and adjusts the values of the preset duration and the preset number of times according to the second adjustment instruction.
  • the operational amplifier amplifies the voltage across the first resistor
  • the comparator compares the amplified voltage of the operational amplifier with a reference voltage, and outputs a control command when the amplified voltage is less than the reference voltage;
  • the judging circuit judges whether the duration of the control command is equal to the preset duration, if it is equal to or greater than the preset duration, it is determined that the control command is valid, and whether the number of valid control commands received within the preset time period is greater than the preset Set the number of times or determine whether the number of consecutively received valid control instructions is greater than a preset number of times, if greater than or equal to the preset number of times, it is determined that the battery is fully charged, and if less than the preset number of times, it is determined that the The battery is not fully charged.
  • the method further includes:
  • the judgment circuit sends a disconnection instruction to the charging circuit to control the charging circuit to stop charging the battery.
  • the judging circuit includes a time window timer, a first counter, a second counter, and a judging circuit, then the judging circuit judges whether the duration of the control instruction is equal to a preset duration, and, judges that it is received within a preset time period Whether the number of valid control instructions received is greater than the preset number, including:
  • the time window timer starts timing after receiving the control instruction output by the comparator, and outputs the first instruction to the decision circuit after the timing duration reaches the preset time period;
  • the first counter After receiving the control instruction output by the comparator, the first counter determines whether the duration of the control instruction is equal to the preset duration, and if it is equal to or greater than the preset duration, outputs a second command to the second counter;
  • the second counter After receiving the second instruction, the second counter adds 1 to the count value, and outputs the count result to the decision circuit;
  • the judgment circuit judges whether the counting result of the second counter is greater than a preset number of times, and if greater than or equal to the preset number of times, sends a disconnection instruction to the charging circuit.
  • the judging circuit includes a first counter and a second counter, the judging circuit judges whether the duration of the control command is equal to a preset duration, and judges whether the number of valid control commands continuously received is greater than the preset number ,include:
  • the first counter determines whether the duration of the control instruction is equal to the preset duration, and if it is equal to or greater than the preset duration, determines that the control command is valid, and outputs the first command to the second counter;
  • the second counter After receiving the first instruction, the second counter increments the count value by 1 and determines whether the number of consecutively received valid control instructions is greater than a preset number of times. If greater than or equal to the preset number of times, then The charging circuit sends a disconnect instruction.
  • it also includes:
  • the judgment circuit adjusts the values of the preset duration, the preset time period and the preset number of times according to the received first adjustment instruction
  • the judgment circuit adjusts the value of the preset duration and the preset number of times according to the received second adjustment instruction.
  • a method for detecting full battery including:
  • the method further includes:
  • the judging circuit judges whether the duration of the control command is equal to the preset duration, and whether the number of valid control commands received within the preset time period is greater than the preset number includes:
  • start timing After receiving the control instruction, start timing, and determine whether the duration of each control instruction received is equal to the preset duration, and if it is equal to or greater than the preset duration, increment the count value by 1;
  • the judgment circuit judges whether the duration of the control instruction is equal to the preset duration, and whether the number of consecutively received valid control instructions is greater than the preset number includes:
  • the count result of the count value it is determined whether the number of consecutively received valid control instructions is greater than a preset number of times, and if greater than or equal to the preset number of times, a disconnection instruction is sent to the charging circuit.
  • it also includes:
  • the battery fullness detection circuit and the method and electronic device for detecting the battery fullness provided by the present invention, since the first resistor is connected in series between the battery and the charging circuit, the current in the first resistance is equal to the charging current of the battery. By judging whether the voltage across the first resistor is less than the reference voltage, it can be judged whether the charging current of the battery is less than the cut-off threshold, so that when the voltage across the first resistor is less than the reference voltage, the battery can be fully charged;
  • Figure 1 is a schematic diagram of the charging process of lithium ion electrons
  • FIG. 2 is a schematic structural diagram of a battery full detection circuit according to an embodiment of the present invention.
  • FIG. 3 is a schematic structural diagram of a judgment circuit provided by an embodiment of the present invention.
  • FIG. 4 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
  • FIG. 5 is a flowchart of a method for detecting a full battery according to an embodiment of the present invention.
  • FIG. 6 is a flowchart of another method for detecting a full battery according to an embodiment of the present invention.
  • the embodiment of the present invention provides a battery full detection circuit, which is applied to an electronic device with a battery.
  • the electronic device may be a smart phone, a notebook computer, an electric vehicle, an energy storage power station, and the like.
  • the battery full detection circuit provided by the embodiment of the present invention includes a first resistor 3, an operational amplifier 4, a comparator 5, a judgment circuit 6 and a second resistor 7.
  • the first resistor 3 is connected in series between the battery 1 and the charging circuit 2 that charges the battery 1.
  • the battery 1 in the embodiment of the present invention may be a lithium ion battery or other rechargeable batteries, and the present invention is not limited to this.
  • the charging circuit 2 is used to receive the power supply current from the charger and charge the battery 1 using the power supply current.
  • the first input terminal of the operational amplifier 4 is connected to the first terminal of the first resistor 3, the second input terminal of the operational amplifier 4 is connected to the second terminal of the first resistor 3, and the operational amplifier 4 is used to The voltage is amplified, and the amplified voltage is output to the comparator 5.
  • the first terminal of the second resistor 7 is connected to the output terminal of the operational amplifier 4, and the second terminal of the second resistor 7 is grounded, wherein the second resistor 7 is a load resistor.
  • the first input terminal of the comparator 5 is connected to the output terminal of the operational amplifier 4, and the second input terminal of the comparator 5 is connected to the reference voltage terminal.
  • the comparator 5 is used to connect the amplified voltage (that is, the output voltage of the operational amplifier 4) to The reference voltage Vref is compared, and when the amplified voltage is less than the reference voltage Vref, a control command is output to the judgment circuit 6.
  • the input of the judging circuit 6 is connected to the output of the comparator 5.
  • the judging circuit 6 is used to judge whether the duration of the control command is equal to the preset duration. If it is equal to or greater than the preset duration, the control command is valid, if it is less than the preset duration , It is determined that the control command is invalid, and it is determined whether the number of valid control commands received within the preset time period is greater than the preset number (the first preset number), and if greater than or equal to the first preset number, the battery 1 is determined It has been fully charged. If it is less than the first preset number of times, it is determined that the battery 1 is not fully charged.
  • the judging circuit 6 is used to judge whether the duration of the control instruction is equal to the preset duration, if it is equal to or greater than the preset duration, the control instruction is determined to be valid, if it is less than the preset duration, the control instruction is determined to be invalid, and the effective control The number of times is cleared, and it is determined whether the number of valid control commands continuously received is greater than the preset number of times (the second preset number of times). If it is greater than or equal to the second preset number of times, it is determined that the battery 1 is fully charged. The second preset number of times determines that the battery 1 is not fully charged.
  • the judgment circuit 6 in the embodiment of the present invention is also used to send a disconnection instruction to the charging circuit 2 when it is determined that the battery 1 has been fully charged, so as to control the charging circuit 2 to stop charging the battery 1.
  • the charging circuit 2 includes a switch that controls whether the charging circuit 2 charges the battery 1, that is, when the switch is closed, the charging circuit 2 charges the battery 1, and when the switch is off, the charging circuit 2 does not Charge the battery 1 again.
  • the judgment circuit 6 judges whether the number of valid control commands received within a preset time period is greater than the first preset number to determine whether the battery 1 is fully charged, the The judgment circuit 6 is further used to adjust the values of the preset duration, the preset time period and the preset number of times (the first preset number of times) according to the received first adjustment instruction, so as to more accurately determine the battery 1 is fully charged.
  • the preset duration, preset time period, and preset times can be dynamically adjusted according to the current power consumption of the mobile phone Value to avoid charging dissatisfaction or overshoot.
  • the charging process of the battery 1 includes four stages: a trickle charging stage, a constant current charging stage, a constant voltage charging stage, and a charging termination stage, and in the constant voltage charging stage, when the charging current slowly decreases , And less than the cut-off threshold, that is, the trickle charging current threshold, because the first resistor 3 is connected in series between the battery 1 and the charging circuit 2, the current in the first resistor 3 is equal to the charging current of the battery 1, therefore, the amplified first The voltage across the resistor 3 will be less than the reference voltage. At this time, the comparator 5 will flip and output the control command Iterm.
  • the charging current does not decrease monotonously. Because of the noise in the charging current, the charging current will fluctuate around the cut-off threshold, resulting in the voltage across the amplified first resistor 3 fluctuating near the reference voltage , Causing the comparator 5 to toggle back and forth and output the control instruction Iterm multiple times. However, only when the duration of the control command Iterm is greater than the preset duration, the control command Iterm is a valid command, can it indicate that the charging current of the battery 1 is less than the cut-off threshold, and can indicate that the battery 1 has been fully charged.
  • the embodiment of the present invention determines whether the control instruction Iterm is a valid control instruction by determining whether the duration of the control instruction Iterm is equal to the preset duration. And further determine whether the number of valid control commands Iterm received during the preset time period is greater than the preset number of times to accurately determine whether the battery 1 has been fully charged.
  • the judgment circuit 6 starts the time window timing when the first control instruction Iterm arrives, and at the same time, judges whether the control instruction Iterm is a valid control instruction, if the control instruction Iterm lasts for a long time If the real-time length is greater than the preset time length L, the control instruction Iterm is valid, and the control instruction Iterm counts by 1; if the time of the control instruction Iterm is less than the preset time length L, the control instruction Iterm is an invalid control instruction. The number of statistics is unchanged.
  • the judgment circuit 6 judges that the battery 1 has been fully charged, and the judgment circuit 6 sends a break to the charging circuit 2 The on command controls the charging circuit 2 to stop charging the battery 1. If the counted number of valid control instructions Iterm does not reach the preset number N when the time window timer reaches the preset time T, then the statistics is invalid, the time window will be closed, and the count of control instructions Iterm will also be cleared zero. When the new control instruction Iterm arrives, the time window timing and the effective control instruction Iterm count will restart.
  • the judgment circuit 6 when the judgment circuit 6 judges whether the number of valid control commands received within a preset time period is greater than the first preset number to determine whether the battery 1 is fully charged, as shown in FIG. 3
  • the judgment circuit 6 includes a time window timer 60, a first counter 61, a second counter 62, and a decision circuit 63;
  • the input terminal of the time window timer 60 is connected to the output terminal of the comparator 5, and is used to start timing after the comparator 5 outputs a control instruction, and outputs the first instruction to the judgment circuit 63 after the timing duration reaches a preset time period;
  • the input terminal of the first counter 61 is connected to the output terminal of the comparator 5 to determine whether the duration of the control command is equal to the preset duration after the comparator 5 outputs the control command, and if it is equal to or greater than the preset duration, output the second command To the second counter 62;
  • the input terminal of the second counter 62 is connected to the output terminal of the first counter 61, and is used to increase the count value by 1 after receiving the second instruction and output the count result to the decision circuit 63;
  • the decision circuit 63 is connected to the output terminal of the time window timer 60 and the output terminal of the second counter 62, and is used to determine whether the count result of the second counter 62 is greater than a preset number of times if it is greater than or equal to At a preset number of times, a disconnection instruction is sent to the charging circuit 2.
  • the present invention is not limited to this.
  • the judgment circuit 6 may also implement the above-mentioned functions through other logic devices.
  • the judging circuit 6 when the judging circuit 6 judges whether the battery 1 is fully charged by judging whether the number of valid control commands continuously received is greater than the second preset number of times, the judging circuit 6 includes a first counter and a second counter;
  • the input terminal of the first counter is connected to the output terminal of the comparator 5, the output terminal of the first counter is connected to the input terminal of the second counter, and the output terminal of the second counter is connected to the charging circuit 2;
  • the first counter is used to determine whether the duration of the control instruction is equal to the preset duration. If it is equal to or greater than the preset duration, the control command is determined to be valid, and the first instruction is output to the second counter;
  • the second counter is used to increase the count value by 1 after receiving the first command, and determine whether the number of valid control commands continuously received is greater than the preset number of times, and if greater than or equal to the preset number of times, send a break to the charging circuit Open instruction.
  • the present invention is not limited to this.
  • the judgment circuit 6 may also implement the above-mentioned functions through other logic devices.
  • the judgment circuit 6 judges whether the battery 1 is fully charged by judging whether the number of valid control commands continuously received is greater than the preset number
  • the judgment circuit 6 in the embodiment of the present invention is also used to The received second adjustment instruction adjusts the values of the preset duration and the preset number of times (the second preset number of times) to more accurately determine the battery 1 is fully charged.
  • the preset duration and the number of preset times can be dynamically adjusted according to the current power consumption of the mobile phone to avoid charging Dissatisfaction or overshoot.
  • the charging process of the battery 1 includes four stages: a trickle charging stage, a constant current charging stage, a constant voltage charging stage, and a charging termination stage, and in the constant voltage charging stage, when the charging current slowly decreases , And less than the cut-off threshold, that is, the trickle charging current threshold, because the first resistor 3 is connected in series between the battery 1 and the charging circuit 2, the current in the first resistor 3 is equal to the charging current of the battery 1, therefore, the amplified first The voltage across the resistor 3 will be less than the reference voltage. At this time, the comparator 5 will flip and output the control command Iterm.
  • the charging current does not decrease monotonously. Because of the noise in the charging current, the charging current will fluctuate around the cut-off threshold, resulting in the voltage across the amplified first resistor 3 fluctuating near the reference voltage , Causing the comparator 5 to toggle back and forth and output the control instruction Iterm multiple times. However, only when the duration of the control command Iterm is greater than the preset duration, the control command Iterm is a valid command, can it indicate that the charging current of the battery 1 is less than the cut-off threshold, and can indicate that the battery 1 has been fully charged.
  • the embodiment of the present invention determines whether the control instruction Iterm is a valid control instruction by determining whether the duration of the control instruction Iterm is equal to the preset duration. And further determine whether the number of valid control commands Iterm received continuously is greater than a preset number to accurately determine whether the battery 1 has been fully charged.
  • the judgment circuit 6 judges whether the control instruction Iterm is a valid control instruction when the first control instruction Iterm arrives, if the continuous length of the control instruction Iterm is longer than the preset duration L , The control instruction Iterm is valid, and the control instruction Iterm counts by 1; if the time of the control instruction Iterm is less than the preset time length L, the control instruction Iterm is an invalid control instruction, and the count of the control instruction Item is cleared.
  • the judgment circuit 6 judges that the battery 1 is fully charged, the judgment circuit 6 sends a disconnection instruction to the charging circuit 2, and controls the charging circuit 2 to stop charging the battery 1 . If the counted number of valid control instructions Iterm does not reach the preset number N, then the judgment circuit 6 will not output the disconnection instruction, and the charging circuit 2 will continue to charge the battery 1.
  • control instruction Iterm whose duration is less than the preset duration L appears in the statistical process, it indicates that the battery 1 outputs a large current to the load or the CPU of the electronic device, etc., and the count of the control instruction Iterm will be cleared to effectively prevent the battery 1 from being fully charged Charging ends. Based on this, in the present invention, by determining whether the number of consecutively received effective control commands is greater than a preset number, it is possible to prevent the battery 1 from ending charging before it is fully charged.
  • An embodiment of the present invention also provides an electronic device, which may be a smart phone, a notebook computer, an electric vehicle, an energy storage power station, etc.
  • the electronic device includes a battery 1 and a charging chip, and the charging The chip includes a charging circuit 2 and a battery full detection circuit provided in any of the above embodiments.
  • the charging circuit 2 is a circuit that charges the battery 1.
  • the electronic device in the embodiment of the present invention includes a main controller 8, which is a CPU (Central Processing Unit / Processor, central processing unit) of the electronic device.
  • the main controller 8 is connected to the judgment circuit 6 of the battery full detection circuit, and is used to input a first adjustment instruction or a second adjustment instruction to the judgment circuit 6 according to the power consumption of the electronic device to adjust the preset duration according to the first adjustment instruction ,
  • the value of the preset time period and the preset number of times (the first preset number of times), or the preset duration and the preset number of times (the second preset number of times) are adjusted according to the second adjustment instruction.
  • the main controller 8 generates a first adjustment command or a second adjustment command according to the power consumption of the electronic device, and sends the first adjustment command or the second adjustment command to the judgment circuit 6, and the judgment circuit 6 receives the first After the adjustment instruction, adjust the value of the preset duration, preset time period and preset times (first preset number), or after receiving the second adjustment command, adjust the preset duration and preset number (second preset number of times) ).
  • the values of the preset duration, the preset time period and the preset number of times may be reduced, and when the power consumption of the electronic device is small, the preset duration and the preset time period may be increased And the preset number of times.
  • the value of the preset duration and the preset number of times may be reduced, and when the power consumption of the electronic device is small, the value of the preset duration and the preset number of times may be increased.
  • An embodiment of the present invention also provides a method for detecting a battery fullness, which is applied to the battery fullness detection circuit provided in any of the above embodiments, as shown in FIG. 5, including:
  • S1 The operational amplifier amplifies the voltage across the first resistor
  • S2 The comparator compares the amplified voltage of the operational amplifier with a reference voltage, and outputs a control command when the amplified voltage is less than the reference voltage;
  • S3 The judgment circuit judges whether the duration of the control instruction is equal to the preset duration, if it is equal to or greater than the preset duration, then proceeds to S4;
  • S5 The judging circuit judges whether the number of valid control commands received within the preset time period is greater than the preset number or the judging circuit judges whether the number of consecutive valid control commands received is greater than the preset number, if greater than or equal to the preset The number of times, then enter S6, if less than the preset number of times, then enter S7;
  • the embodiment of the present invention determines whether the control instruction is a valid control instruction through a judgment circuit to determine whether the duration of the control instruction is equal to the preset duration. And further determine whether the number of valid control commands received within the preset time period is greater than the preset number to accurately determine whether the battery is fully charged; or, further determine whether the number of valid control commands received continuously is greater than the preset Times to accurately determine whether the battery is fully charged.
  • the method further includes:
  • the judgment circuit sends a disconnection instruction to the charging circuit to control the charging circuit to stop charging the battery.
  • the judging circuit judges whether the duration of the control instruction is equal to a preset duration, and, within a preset time period Whether the number of valid control commands received is greater than the preset number, including:
  • the time window timer starts timing after receiving the control instruction output by the comparator, and outputs the first instruction to the decision circuit after the timing duration reaches the preset time period;
  • the first counter After receiving the control command output by the comparator, the first counter determines whether the duration of the control command is equal to the preset duration, and if it is equal to or greater than the preset duration, outputs a second command to the second counter;
  • the second counter After receiving the second instruction, the second counter adds 1 to the count value and outputs the count result to the decision circuit;
  • the judgment circuit judges whether the counting result of the second counter is greater than a preset number of times, and if greater than or equal to the preset number of times, sends a disconnection instruction to the charging circuit.
  • the judging circuit when the judging circuit includes the first counter and the second counter, the judging circuit judges whether the duration of the control command is equal to the preset duration, and whether the number of valid control commands continuously received is greater than the preset number ,include:
  • the first counter determines whether the duration of the control instruction is equal to the preset duration. If it is equal to or greater than the preset duration, it determines that the control command is valid and outputs the first command to the second counter;
  • the second counter After receiving the first command, the second counter adds 1 to the count value, and determines whether the number of valid control commands continuously received is greater than the preset number of times, and if greater than or equal to the preset number of times, sends a disconnection instruction to the charging circuit .
  • the method further includes:
  • the judgment circuit adjusts the values of the preset duration, the preset time period and the preset number of times (the first preset number of times) according to the received first adjustment instruction.
  • the preset duration, preset time period, and preset times can be dynamically adjusted according to the current power consumption of the mobile phone Value to avoid charging dissatisfaction or overshoot.
  • the values of the preset duration, preset time period, and preset number of times may be reduced, and when the power consumption of the electronic device is small, the preset duration, preset Time period and preset times.
  • the method further includes:
  • the judgment circuit adjusts the value of the preset duration and the preset number of times (the second preset number of times) according to the received second adjustment instruction.
  • the preset duration and the number of preset times can be dynamically adjusted according to the current power consumption of the mobile phone to avoid charging Dissatisfaction or overshoot.
  • the values of the preset duration and the preset number of times may be reduced, and when the power consumption of the electronic device is small, the values of the preset duration and the preset number of times may be increased.
  • An embodiment of the present invention also provides a method for detecting a full battery, as shown in FIG. 6, including:
  • S10 Amplify the voltage across the first resistor, the first resistor is connected in series between the battery and the charging circuit that charges the battery;
  • S11 Compare the amplified voltage with a reference voltage, and output a control command when the amplified voltage is less than the reference voltage;
  • S12 Determine whether the duration of the control instruction is equal to the preset duration, and if it is equal to or greater than the preset duration, proceed to S13;
  • S14 Determine whether the number of valid control commands received within a preset time period is greater than the preset number or determine whether the number of valid control commands received continuously is greater than the preset number, if greater than or equal to the preset number, Then go to S15, if it is less than the preset number of times, go to S16;
  • whether the control instruction is a valid control instruction is determined by determining whether the duration of the control instruction is equal to the preset duration. And further determine whether the number of valid control commands received within the preset time period is greater than the preset number to accurately determine whether the battery is fully charged; or, further determine whether the number of valid control commands received continuously is greater than the preset Times to accurately determine whether the battery is fully charged.
  • the method further includes:
  • the judgment circuit judges whether the duration of the control command is equal to the preset duration, and whether the number of valid control commands received within the preset time period is greater than the preset number includes:
  • start timing After receiving the control instruction, start timing, and determine whether the duration of each control instruction received is equal to the preset duration, and if it is equal to or greater than the preset duration, increment the count value by 1;
  • the judging circuit judges whether the duration of the control command is equal to the preset duration, and whether the number of consecutively received valid control commands is greater than the preset number includes:
  • the count result of the count value it is determined whether the number of consecutively received valid control instructions is greater than a preset number of times, and if greater than or equal to the preset number of times, a disconnection instruction is sent to the charging circuit.
  • the method further includes:
  • the values of the preset duration, the preset time period and the preset number of times are adjusted.
  • the preset duration, preset time period, and preset times can be dynamically adjusted according to the current power consumption of the mobile phone Value to avoid charging dissatisfaction or overshoot.
  • the values of the preset duration, preset time period, and preset number of times may be reduced, and when the power consumption of the electronic device is small, the preset duration, preset Time period and preset times.
  • the method further includes:
  • the received second adjustment instruction adjust the value of the preset duration and the preset number of times (the second preset number of times).
  • the preset duration and the number of preset times can be dynamically adjusted according to the current power consumption of the mobile phone to avoid charging Dissatisfaction or overshoot.
  • the values of the preset duration and the preset number of times may be reduced, and when the power consumption of the electronic device is small, the values of the preset duration and the preset number of times may be increased.
  • the battery fullness detection circuit and the method and electronic device for detecting the battery fullness provided by the present invention, since the first resistor is connected in series between the battery and the charging circuit, the current in the first resistance is equal to the charging current of the battery. By judging whether the voltage across the first resistor is less than the reference voltage, it can be judged whether the charging current of the battery is less than the cut-off threshold, so that whether the battery is fully charged when the voltage across the first resistor is less than the reference voltage;

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Abstract

一种电池（1）充满检测电路及其检测电池（1）充满的方法、电子装置，第一电阻（3）串联在电池（1）以及向电池（1）充电的充电电路（2）之间；运算放大器（4）对第一电阻（3）两端的电压进行放大（S1），并将放大后的电压输出至比较器（5）；比较器（5）将运算放大器（4）放大后的电压与参考电压进行比较，并在放大后的电压小于参考电压时，输出控制指令（S2）；判断电路（6）判断控制指令的时长是否等于预设时长（S3），如果等于或大于预设时长，则判定控制指令有效（S4，S13），判断电路（6）判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断电路（6）判断连续接收到的有效的控制指令的次数是否大于预设次数（S5），如果大于或等于预设次数，则判定电池（1）已经充满电（S6，S15），如果小于预设次数，判定电池（1）并未充满电（S7,S16）。

Description

电池充满检测电路及其检测电池充满的方法、电子装置
本申请要求于2018年11月13日提交中国专利局、申请号为CN201811345786.5、发明名称为“电池充满检测电路及其检测电池充满的方法、电子装置”的中国专利申请以及于2018年11月13日提交中国专利局、申请号为CN201811345257.5、发明名称为“电池充满检测电路及其检测电池充满的方法、电子装置”的中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本发明涉及电池充电技术领域，更具体地说，涉及一种电池充满检测电路及其检测电池充满的方法、电子装置。
背景技术
锂离子电池由于具有高电压、高能量密度、高安全性、低自放电率等优点，已经被广泛应用在电动汽车、储能电站、智能手机和笔记本电脑等领域。
锂离子电池的充电过程可以分为四个阶段：涓流充电阶段(预充电阶段)、恒流充电阶段、恒压充电阶段以及充电终止阶段。
如图1所示，涓流充电阶段，先采用涓流充电对完全放电的电池进行预充电(恢复性充电)。在电池电压低于3V左右时采用涓流充电，涓流充电电流是恒流充电电流的十分之一。以恒定充电电流等于1A为例，涓流充电电流为100mA。
恒流充电阶段，当电池电压上升到涓流充电阈值以上时，提高充电电流进行恒流充电。恒流充电的电流在0.2C至1.0C之间。电池电压随着恒流充电过程逐步升高，一般单节电池设定的电压为3.0V～4.2V。
恒压充电阶段，当电池电压上升到4.2V时，恒流充电结束，开始恒压充电阶段。电流根据电池电芯的饱和程度，随着充电过程的继续，充电电流由最大值慢慢减小，当减小到0.01C时，认为充电终止。其中，C是以电池标称容量对 照电流的一种表示方法，如电池是1000mAh的容量，1C就是充电电流1000mA。
充电终止阶段，有两种典型的充电终止判断方法：最小充电电流判断法和定时器判断法。最小充电电流判断法监视恒压充电阶段的充电电流，并在充电电流减小到0.02C至0.07C时终止充电。定时器判断法从恒压充电阶段开始时计时，持续充电两个小时后终止充电过程。
但是，这两种方法都不能准确判断电池是否充满，容易对电池进行过冲，对电池的寿命影响很大。
发明内容
有鉴于此，本发明提供了一种电池充满检测电路及其检测电池充满的方法、电子装置，以解决现有技术中不能准确判断电池是否充满的问题。
为实现上述目的，本发明提供如下技术方案：
一种电池充满检测电路，包括第一电阻、运算放大器、比较器、第二电阻和判断电路；
所述第一电阻串联在电池以及向所述电池充电的充电电路之间；
所述运算放大器的第一输入端与所述第一电阻的第一端相连，所述运算放大器的第二输入端与所述第一电阻的第二端相连，所述运算放大器用于对所述第一电阻两端的电压进行放大，并将放大后的电压输出至所述比较器；
所述第二电阻的第一端与所述运算放大器的输出端相连，所述第二电阻的第二端接地；
所述比较器的第一输入端与所述运算放大器的输出端相连，所述比较器的第二输入端与参考电压端相连，所述比较器用于将所述放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令至所述判断电路；
所述判断电路的输入端与所述比较器的输出端相连，所述判断电路用于判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果小于所 述预设次数，判定所述电池并未充满电。
可选地，所述判断电路还用于在判定所述电池已经充满电时，向所述充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
可选地，所述判断电路包括时间窗口定时器、第一计数器、第二计数器和判决电路；
所述时间窗口定时器的输入端与所述比较器的输出端相连，用于在所述比较器输出所述控制指令后开始计时，并在计时时长达到所述预设时间段后，输出第一指令至所述判决电路；
所述第一计数器的输入端与所述比较器的输出端相连，用于在所述比较器输出所述控制指令后，判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，输出第二指令至所述第二计数器；
所述第二计数器的输入端与所述第一计数器的输出端相连，用于在接收到所述第二指令后将计数值加1，并将计数结果输出至所述判决电路；
所述判决电路与所述时间窗口定时器的输出端和所述第二计数器的输出端相连，用于在接收到所述第一指令后，判断所述第二计数器的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，所述判断电路包括第一计数器和第二计数器；
所述第一计数器的输入端与所述比较器的输出端相连，所述第一计数器的输出端与所述第二计数器的输入端相连，所述第二计数器的输出端与所述充电电路相连；
所述第一计数器用于判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，输出第一指令至所述第二计数器；
所述第二计数器用于在接收到所述第一指令后将计数值加1，并判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，所述判断电路还用于根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值，根据接收到的第二调整指令，调 整所述预设时长和所述预设次数的值。
一种电子装置，包括电池和充电芯片，所述充电芯片包括充电电路和电池充满检测电路；
所述充电电路用于向所述电池充电；
所述电池充满检测电路为如上任一项所述的电池充满检测电路。
可选地，还包括主控制器；
所述主控制器与所述电池充满检测电路的判断电路相连，用于根据所述电子装置的耗电情况向所述判断电路输入第一调整指令或第二调整指令，以根据所述第一调整指令调整所述预设时长、所述预设时间段和所述预设次数的值，根据所述第二调整指令调整所述预设时长和所述预设次数的值。
一种检测电池充满的方法，应用于如上任一项所述的电池充满检测电路，包括：
运算放大器对第一电阻两端的电压进行放大；
比较器将所述运算放大器放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
判断电路判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果小于所述预设次数，判定所述电池并未充满电。
可选地，判定所述电池已经充满电之后，还包括：
所述判断电路向充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
可选地，所述判断电路包括时间窗口定时器、第一计数器、第二计数器和判决电路，则判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，包括：
所述时间窗口定时器在接收到所述比较器输出的控制指令后开始计时，并在计时时长达到所述预设时间段后，输出第一指令至所述判决电路；
所述第一计数器在接收到所述比较器输出的所述控制指令后，判断所述控 制指令的时长是否等于预设时长，如果等于或大于预设时长，输出第二指令至所述第二计数器；
所述第二计数器在接收到所述第二指令后将计数值加1，并将计数结果输出至所述判决电路；
所述判决电路在接收到所述第一指令后，判断所述第二计数器的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，所述判断电路包括第一计数器和第二计数器，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
所述第一计数器判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，输出第一指令至所述第二计数器；
所述第二计数器在接收到所述第一指令后将计数值加1，并判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，还包括：
所述判断电路根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值；
所述判断电路根据接收到的第二调整指令，调整所述预设时长和所述预设次数的值。
一种检测电池充满的方法，包括：
对第一电阻两端的电压进行放大，所述第一电阻串联在电池以及向所述电池充电的充电电路之间；
将放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果 小于所述预设次数，判定所述电池并未充满电。
可选地，判定所述电池已经充满电之后，还包括：
向充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
可选地，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，包括：
在接收到所述控制指令后开始计时，并判断每次接收到的所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，将计数值加1；
判断计时的时长是否达到所述预设时间段，如果计时的时长达到所述预设时间段，判断所述计数值的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，将计数值加1；
根据所述计数值的计数结果判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
可选地，还包括：
根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值；或者，
根据接收到的第二调整指令，调整所述预设时长和所述预设次数的值。
与现有技术相比，本发明所提供的技术方案具有以下优点：
本发明所提供的电池充满检测电路及其检测电池充满的方法、电子装置，由于第一电阻串联在电池以及充电电路之间，因此，第一电阻中的电流等于电池的充电电流。通过判断第一电阻两端的电压是否小于参考电压，即可判断电池的充电电流是否小于截止阈值，从而可以在第一电阻两端的电压小于参考电压时，进行电池是否充满电的判断；
当第一电阻两端的电压小于参考电压时，通过判断生成的控制指令是否是有效控制指令以及判断预设时间段内接收到的有效的控制指令的次数是否大 于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，即可准确判断电池是否已经充满电，避免了噪声等导致误判电池充满电的问题。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据提供的附图获得其他的附图。
图1为锂离子电子的充电过程示意图；
图2为本发明实施例提供的一种电池充满检测电路的结构示意图；
图3为本发明实施例提供的一种判断电路的结构示意图；
图4为本发明实施例提供的一种电子装置的结构示意图；
图5为本发明实施例提供的一种检测电池充满的方法的流程图；
图6为本发明实施例提供的另一种检测电池充满的方法的流程图。
具体实施方式
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
本发明实施例提供了一种电池充满检测电路，应用于具有电池的电子装置，该电子装置可以是智能手机、笔记本电脑、电动汽车以及储能电站等。
如图2所示，本发明实施例提供的电池充满检测电路，包括第一电阻3、运算放大器4、比较器5、判断电路6和第二电阻7。
其中，第一电阻3串联在电池1以及向电池1充电的充电电路2之间。需要说明的是，本发明实施例中的电池1可以是锂离子电池，也可以是其他充电电池，本发明并不仅限于此。充电电路2用于从充电器接收供电电流，并利用 供电电流对电池1进行充电。
运算放大器4的第一输入端与第一电阻3的第一端相连，运算放大器4的第二输入端与第一电阻3的第二端相连，运算放大器4用于对第一电阻3两端的电压进行放大，并将放大后的电压输出至比较器5。
第二电阻7的第一端与运算放大器4的输出端相连，第二电阻7的第二端接地，其中，第二电阻7为负载电阻。
比较器5的第一输入端与运算放大器4的输出端相连，比较器5的第二输入端与参考电压端相连，比较器5用于将放大后的电压(即运算放大器4输出电压)与参考电压Vref进行比较，并在放大后的电压小于参考电压Vref时，输出控制指令至判断电路6。
判断电路6的输入端与比较器5的输出端相连，判断电路6用于判断控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定控制指令有效，如果小于预设时长，则判定控制指令无效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数(第一预设次数)，如果大于或等于第一预设次数，则判定电池1已经充满电，如果小于第一预设次数，判定电池1并未充满电。
或者，判断电路6用于判断控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定控制指令有效，如果小于预设时长，则判定控制指令无效，并将有效的控制指令的次数清零，并判断连续接收到的有效的控制指令的次数是否大于预设次数(第二预设次数)，如果大于或等于第二预设次数，则判定电池1已经充满电，如果小于第二预设次数，判定电池1并未充满电。
在上述实施例的基础上，本发明实施例中的判断电路6还用于在判定电池1已经充满电时，向充电电路2发送断开指令，以控制充电电路2停止向电池1充电。需要说明的是，充电电路2包括开关，该开关控制充电电路2是否向电池1充电，也就是说，当开关闭合时，充电电路2向电池1充电，当开关断开时，充电电路2不再向电池1充电。
在上述实施例的基础上，当判断电路6通过判断预设时间段内接收到的有效的控制指令的次数是否大于第一预设次数以判断电池1是否充满电时，本发明实施例中的判断电路6还用于根据接收到的第一调整指令，调整预设时长、 预设时间段和预设次数(第一预设次数)的值，以更准确地进行电池1充满电的判定。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长、预设时间段和预设次数的值，避免充电不满或者过冲。
本发明实施例中，电池1的充电过程包括涓流充电阶段、恒流充电阶段、恒压充电阶段以及充电终止阶段这四个阶段，并且，在恒压充电阶段，当充电电流慢慢减小，且小于截止阈值即涓流充电电流阈值时，由于第一电阻3串联在电池1以及充电电路2之间，第一电阻3中的电流等于电池1的充电电流，因此，放大后的第一电阻3两端的电压会小于参考电压，此时，比较器5会发生翻转，并输出控制指令Iterm。
在实际充电过程中，充电电流并不是单调的逐步减小的，由于充电电流存在噪声，因此，充电电流会在截止阈值附近起伏，导致放大后的第一电阻3两端的电压在参考电压附近起伏，导致比较器5来回翻转，多次输出控制指令Iterm。但是，只有当控制指令Iterm的时长大于预设时长时，控制指令Iterm才是有效的指令，才能表征电池1的充电电流小于截止阈值，才能表征电池1已经充满电。
基于此，为了排除不满足预设时长要求的噪声干扰，本发明实施例中通过判断电路判断控制指令Iterm的时长是否等于预设时长，来判断控制指令Iterm是否是有效控制指令。并进一步判断预设时间段内接收到的有效的控制指令Iterm的次数是否大于预设次数，来准确判断电池1是否已经充满电。
在本发明的一个具体实施例中，判断电路6在第一个控制指令Iterm到来时，启动时间窗口定时，同时，判断该控制指令Iterm是否是有效的控制指令，若该控制指令Iterm持续的长度即时长大于预设时长L，则该控制指令Iterm有效，控制指令Iterm统计次数加1；若该控制指令Iterm的时长小于预设时长L，则该控制指令Iterm为无效控制指令，控制指令Item的统计次数不变。
在时间窗口定时器到达预设时间T之前，若统计到的有效的控制指令Iterm的次数达到预设次数N，那么，判断电路6判定电池1已经充满电，判断电路6向充电电路2发送断开指令，控制充电电路2停止向电池1充电。若在时间窗口 定时器到达预设时间T时，统计到的有效控制指令Iterm的次数未到达预设次数N，那么，该次统计无效，时间窗口将关闭，控制指令Iterm的统计次数也将清零。在新的控制指令Iterm到达时，时间窗口定时和有效控制指令Iterm计数将重新开始。
在本发明的一个实施例中，当判断电路6通过判断预设时间段内接收到的有效的控制指令的次数是否大于第一预设次数以判断电池1是否充满电时，如图3所示，判断电路6包括时间窗口定时器60、第一计数器61、第二计数器62和判决电路63；
时间窗口定时器60的输入端与比较器5的输出端相连，用于在比较器5输出控制指令后开始计时，并在计时时长达到预设时间段后，输出第一指令至判决电路63；
第一计数器61的输入端与比较器5的输出端相连，用于在比较器5输出控制指令后，判断控制指令的时长是否等于预设时长，如果等于或大于预设时长，输出第二指令至第二计数器62；
第二计数器62的输入端与第一计数器61的输出端相连，用于在接收到第二指令后将计数值加1，并将计数结果输出至判决电路63；
判决电路63与时间窗口定时器60的输出端和第二计数器62的输出端相连，用于在接收到第一指令后，判断第二计数器62的计数结果是否大于预设次数，如果大于或等于预设次数，则向充电电路2发送断开指令。
当然，本发明并不仅限于此，在其他实施例中，判断电路6还可以通过其他逻辑器件实现上述功能。
本发明另一实施例中，当判断电路6通过判断连续接收到的有效的控制指令的次数是否大于第二预设次数以判断电池1是否充满电时，判断电路6包括第一计数器和第二计数器；
第一计数器的输入端与比较器5的输出端相连，第一计数器的输出端与第二计数器的输入端相连，第二计数器的输出端与充电电路2相连；
第一计数器用于判断控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定控制指令有效，输出第一指令至第二计数器；
第二计数器用于在接收到第一指令后将计数值加1，并判断连续接收到的 有效的控制指令的次数是否大于预设次数，如果大于或等于预设次数，则向充电电路发送断开指令。
当然，本发明并不仅限于此，在其他实施例中，判断电路6还可以通过其他逻辑器件实现上述功能。
在上述实施例的基础上，当判断电路6通过判断连续接收到的有效的控制指令的次数是否大于预设次数判断电池1是否充满电时，本发明实施例中的判断电路6还用于根据接收到的第二调整指令，调整预设时长和预设次数(第二预设次数)的值，以更准确地进行电池1充满电的判定。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长和预设次数的值，避免充电不满或者过冲。
本发明实施例中，电池1的充电过程包括涓流充电阶段、恒流充电阶段、恒压充电阶段以及充电终止阶段这四个阶段，并且，在恒压充电阶段，当充电电流慢慢减小，且小于截止阈值即涓流充电电流阈值时，由于第一电阻3串联在电池1以及充电电路2之间，第一电阻3中的电流等于电池1的充电电流，因此，放大后的第一电阻3两端的电压会小于参考电压，此时，比较器5会发生翻转，并输出控制指令Iterm。
在实际充电过程中，充电电流并不是单调的逐步减小的，由于充电电流存在噪声，因此，充电电流会在截止阈值附近起伏，导致放大后的第一电阻3两端的电压在参考电压附近起伏，导致比较器5来回翻转，多次输出控制指令Iterm。但是，只有当控制指令Iterm的时长大于预设时长时，控制指令Iterm才是有效的指令，才能表征电池1的充电电流小于截止阈值，才能表征电池1已经充满电。
基于此，为了排除不满足预设时长要求的噪声干扰，本发明实施例中通过判断电路判断控制指令Iterm的时长是否等于预设时长，来判断控制指令Iterm是否是有效控制指令。并进一步判断连续接收到的有效的控制指令Iterm的次数是否大于预设次数，来准确判断电池1是否已经充满电。
在本发明的一个具体实施例中，判断电路6在第一个控制指令Iterm到来时，判断该控制指令Iterm是否是有效的控制指令，若该控制指令Iterm持续的 长度即时长大于预设时长L，则该控制指令Iterm有效，控制指令Iterm统计次数加1；若该控制指令Iterm的时长小于预设时长L，则该控制指令Iterm为无效控制指令，控制指令Item的统计次数清零。
若统计到的有效的控制指令Iterm的次数达到预设次数N，那么，判断电路6判定电池1已经充满电，判断电路6向充电电路2发送断开指令，控制充电电路2停止向电池1充电。若统计到的有效控制指令Iterm的次数未到达预设次数N，那么，判断电路6不会输出断开指令，充电电路2会持续向电池1充电。
若在统计过程中出现时长小于预设时长L的控制指令Iterm，说明电池1向负载或电子装置的CPU等输出了大电流，控制指令Iterm的统计次数将清零，以有效防止电池1没有充满就结束充电。基于此，本发明中通过判断连续接收到的有效的控制指令的次数是否大于预设次数，可以避免电池1未充满就结束充电。
本发明实施例还提供了一种电子装置，该电子装置可以是智能手机、笔记本电脑、电动汽车以及储能电站等，如图4所示，该电子装置包括电池1和充电芯片，所述充电芯片包括充电电路2和如上任一实施例提供的电池充满检测电路。其中，充电电路2为向电池1充电的电路。
本发明实施例中的电子装置包括主控制器8，该主控制器8为电子装置的CPU(Central Processing Unit/Processor，中央处理器)。该主控制器8与电池充满检测电路的判断电路6相连，用于根据电子装置的耗电情况向判断电路6输入第一调整指令或第二调整指令，以根据第一调整指令调整预设时长、预设时间段和预设次数(第一预设次数)的值，或根据第二调整指令调整预设时长和预设次数(第二预设次数)的值。
也就是说，主控制器8根据电子装置的耗电情况生成第一调整指令或第二调整指令，并将第一调整指令或第二调整指令发送至判断电路6，判断电路6接收到第一调整指令后，调整预设时长、预设时间段和预设次数(第一预设次数)的值，或接收到第二调整指令后，调整预设时长和预设次数(第二预设次数)的值。
具体地，可以在电子装置的耗电量大时，减小预设时长、预设时间段和预设次数的值，在电子装置的耗电量小时，增大预设时长、预设时间段和预设次 数的值。或者，可以在电子装置的耗电量大时，减小预设时长和预设次数的值，在电子装置的耗电量小时，增大预设时长和预设次数的值。
本发明实施例还提供了一种检测电池充满的方法，应用于如上任一实施例提供的电池充满检测电路，如图5所示，包括：
S1：运算放大器对第一电阻两端的电压进行放大；
S2：比较器将所述运算放大器放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
S3：判断电路判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则进入S4；
S4：判定所述控制指令有效，并进入S5；
S5：判断电路判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断电路判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于预设次数，则进入S6，如果小于预设次数，则进入S7；
S6：判定所述电池已经充满电；
S7：判定所述电池并未充满电。
为了排除不满足预设时长要求的噪声干扰，本发明实施例中通过判断电路判断控制指令的时长是否等于预设时长，来判断控制指令是否是有效控制指令。并进一步判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，来准确判断电池是否已经充满电；或者，进一步判断连续接收到的有效的控制指令的次数是否大于预设次数，来准确判断电池是否已经充满电。
本发明实施例中，判定电池已经充满电之后，所述方法还包括：
判断电路向充电电路发送断开指令，以控制充电电路停止向电池充电。
本发明实施例中，当判断电路包括时间窗口定时器、第一计数器、第二计数器和判决电路时，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，包括：
时间窗口定时器在接收到所述比较器输出的控制指令后开始计时，并在计时时长达到所述预设时间段后，输出第一指令至所述判决电路；
第一计数器在接收到所述比较器输出的所述控制指令后，判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，输出第二指令至第二计数器；
所述第二计数器在接收到所述第二指令后将计数值加1，并将计数结果输出至判决电路；
所述判决电路在接收到所述第一指令后，判断所述第二计数器的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
本发明实施例中，当判断电路包括第一计数器和第二计数器时，判断电路判断控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
第一计数器判断控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定控制指令有效，输出第一指令至第二计数器；
第二计数器在接收到第一指令后将计数值加1，并判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于预设次数，则向充电电路发送断开指令。
本发明实施例中，所述方法还包括：
判断电路根据接收到的第一调整指令，调整预设时长、预设时间段和预设次数(第一预设次数)的值。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长、预设时间段和预设次数的值，避免充电不满或者过冲。
具体地，可以在电子装置如手机的耗电量大时，减小预设时长、预设时间段和预设次数的值，在电子装置的耗电量小时，增大预设时长、预设时间段和预设次数的值。
本发明实施例中，所述方法还包括：
判断电路根据接收到的第二调整指令，调整预设时长和预设次数(第二预设次数)的值。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈 值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长和预设次数的值，避免充电不满或者过冲。
具体地，可以在电子装置如手机的耗电量大时，减小预设时长和预设次数的值，在电子装置的耗电量小时，增大预设时长和预设次数的值。
本发明实施例还提供了一种检测电池充满的方法，如图6所示，包括：
S10：对第一电阻两端的电压进行放大，所述第一电阻串联在电池以及向所述电池充电的充电电路之间；
S11：将放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
S12：判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则进入S13；
S13：判定所述控制指令有效，并进入S14；
S14：判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则进入S15，如果小于所述预设次数，则进入S16；
S15：判定所述电池已经充满电；
S16：判定所述电池并未充满电。
为了排除不满足预设时长要求的噪声干扰，本发明实施例中通过判断控制指令的时长是否等于预设时长，来判断控制指令是否是有效控制指令。并进一步判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，来准确判断电池是否已经充满电；或者，进一步判断连续接收到的有效的控制指令的次数是否大于预设次数，来准确判断电池是否已经充满电。
本发明实施例中，判定所述电池已经充满电之后，还包括：
向充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
本实施例中，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，包括：
在接收到所述控制指令后开始计时，并判断每次接收到的所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，将计数值加1；
判断计时的时长是否达到所述预设时间段，如果计时的时长达到所述预设 时间段，判断所述计数值的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
本发明实施例中，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，将计数值加1；
根据所述计数值的计数结果判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
本发明实施例中，所述方法还包括：
根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数(第一预设次数)的值。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长、预设时间段和预设次数的值，避免充电不满或者过冲。
具体地，可以在电子装置如手机的耗电量大时，减小预设时长、预设时间段和预设次数的值，在电子装置的耗电量小时，增大预设时长、预设时间段和预设次数的值。
本发明实施例中，所述方法还包括：
根据接收到的第二调整指令，调整所述预设时长和所述预设次数(第二预设次数)的值。
例如，当手机一边充电一边使用时，往往会导致充电电流无法达到截止阈值导致充电无法停止，本发明中可以根据当前手机的耗电情况动态的调整预设时长和预设次数的值，避免充电不满或者过冲。
具体地，可以在电子装置如手机的耗电量大时，减小预设时长和预设次数的值，在电子装置的耗电量小时，增大预设时长和预设次数的值。
本发明所提供的电池充满检测电路及其检测电池充满的方法、电子装置，由于第一电阻串联在电池以及充电电路之间，因此，第一电阻中的电流等于电池的充电电流。通过判断第一电阻两端的电压是否小于参考电压，即可判断电 池的充电电流是否小于截止阈值，从而可以在第一电阻两端的电压小于参考电压，时，进行电池是否充满电的判断；
当第一电阻两端的电压小于参考电压时，通过判断生成的控制指令是否是有效控制指令以及判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，即可准确判断电池是否已经充满电，避免了噪声等导致误判电池充满电的问题。
本说明书中各个实施例采用递进的方式描述，每个实施例重点说明的都是与其他实施例的不同之处，各个实施例之间相同相似部分互相参见即可。对于实施例公开的装置而言，由于其与实施例公开的方法相对应，所以描述的比较简单，相关之处参见方法部分说明即可。
对所公开的实施例的上述说明，使本领域专业技术人员能够实现或使用本发明。对这些实施例的多种修改对本领域的专业技术人员来说将是显而易见的，本文中所定义的一般原理可以在不脱离本发明的精神或范围的情况下，在其它实施例中实现。因此，本发明将不会被限制于本文所示的这些实施例，而是要符合与本文所公开的原理和新颖特点相一致的最宽的范围。

Claims (17)

  1. 一种电池充满检测电路，其特征在于，包括第一电阻、运算放大器、比较器、第二电阻和判断电路；
    所述第一电阻串联在电池以及向所述电池充电的充电电路之间；
    所述运算放大器的第一输入端与所述第一电阻的第一端相连，所述运算放大器的第二输入端与所述第一电阻的第二端相连，所述运算放大器用于对所述第一电阻两端的电压进行放大，并将放大后的电压输出至所述比较器；
    所述第二电阻的第一端与所述运算放大器的输出端相连，所述第二电阻的第二端接地；
    所述比较器的第一输入端与所述运算放大器的输出端相连，所述比较器的第二输入端与参考电压端相连，所述比较器用于将所述放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令至所述判断电路；
    所述判断电路的输入端与所述比较器的输出端相连，所述判断电路用于判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果小于所述预设次数，判定所述电池并未充满电。
  2. 根据权利要求1所述的检测电路，其特征在于，所述判断电路还用于在判定所述电池已经充满电时，向所述充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
  3. 根据权利要求2所述的检测电路，其特征在于，所述判断电路包括时间窗口定时器、第一计数器、第二计数器和判决电路；
    所述时间窗口定时器的输入端与所述比较器的输出端相连，用于在所述比较器输出所述控制指令后开始计时，并在计时时长达到所述预设时间段后，输出第一指令至所述判决电路；
    所述第一计数器的输入端与所述比较器的输出端相连，用于在所述比较器输出所述控制指令后，判断所述控制指令的时长是否等于预设时长，如果等于 或大于预设时长，输出第二指令至所述第二计数器；
    所述第二计数器的输入端与所述第一计数器的输出端相连，用于在接收到所述第二指令后将计数值加1，并将计数结果输出至所述判决电路；
    所述判决电路与所述时间窗口定时器的输出端和所述第二计数器的输出端相连，用于在接收到所述第一指令后，判断所述第二计数器的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
  4. 根据权利要求2所述的检测电路，其特征在于，所述判断电路包括第一计数器和第二计数器；
    所述第一计数器的输入端与所述比较器的输出端相连，所述第一计数器的输出端与所述第二计数器的输入端相连，所述第二计数器的输出端与所述充电电路相连；
    所述第一计数器用于判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，输出第一指令至所述第二计数器；
    所述第二计数器用于在接收到所述第一指令后将计数值加1，并判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
  5. 根据权利要求1所述的检测电路，其特征在于，所述判断电路还用于根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值，或者根据接收到的第二调整指令，调整所述预设时长和所述预设次数的值。
  6. 一种电子装置，其特征在于，包括电池和充电芯片，所述充电芯片包括充电电路和电池充满检测电路；
    所述充电电路用于向所述电池充电；
    所述电池充满检测电路为权利要求1～5任一项所述的电池充满检测电路。
  7. 根据权利要求6所述的电子装置，其特征在于，还包括主控制器；
    所述主控制器与所述电池充满检测电路的判断电路相连，用于根据所述电子装置的耗电情况向所述判断电路输入第一调整指令或第二调整指令，以根据 所述第一调整指令调整所述预设时长、所述预设时间段和所述预设次数的值，或者根据所述第二调整指令调整所述预设时长和所述预设次数的值。
  8. 一种检测电池充满的方法，其特征在于，应用于权利要求1～5任一项所述的电池充满检测电路，包括：
    运算放大器对第一电阻两端的电压进行放大；
    比较器将所述运算放大器放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
    判断电路判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果小于所述预设次数，判定所述电池并未充满电。
  9. 根据权利要求8所述的方法，其特征在于，判定所述电池已经充满电之后，还包括：
    所述判断电路向充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
  10. 根据权利要求9所述的方法，其特征在于，所述判断电路包括时间窗口定时器、第一计数器、第二计数器和判决电路，则判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数，包括：
    所述时间窗口定时器在接收到所述比较器输出的控制指令后开始计时，并在计时时长达到所述预设时间段后，输出第一指令至所述判决电路；
    所述第一计数器在接收到所述比较器输出的所述控制指令后，判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，输出第二指令至所述第二计数器；
    所述第二计数器在接收到所述第二指令后将计数值加1，并将计数结果输出至所述判决电路；
    所述判决电路在接收到所述第一指令后，判断所述第二计数器的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断 开指令。
  11. 根据权利要求9所述的方法，其特征在于，所述判断电路包括第一计数器和第二计数器，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
    所述第一计数器判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，输出第一指令至所述第二计数器；
    所述第二计数器在接收到所述第一指令后将计数值加1，并判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
  12. 根据权利要求8所述的方法，其特征在于，还包括：
    所述判断电路根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值；或者
    所述判断电路根据接收到的第二调整指令，调整所述预设时长和所述预设次数的值。
  13. 一种检测电池充满的方法，其特征在于，包括：
    对第一电阻两端的电压进行放大，所述第一电阻串联在电池以及向所述电池充电的充电电路之间；
    将放大后的电压与参考电压进行比较，并在所述放大后的电压小于所述参考电压时，输出控制指令；
    判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，并判断预设时间段内接收到的有效的控制指令的次数是否大于预设次数或者判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则判定所述电池已经充满电，如果小于所述预设次数，判定所述电池并未充满电。
  14. 根据权利要求13所述的方法，其特征在于，判定所述电池已经充满电之后，还包括：
    向充电电路发送断开指令，以控制所述充电电路停止向所述电池充电。
  15. 根据权利要求14所述的方法，其特征在于，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断预设时间段内接收到的有效的控制 指令的次数是否大于预设次数，包括：
    在接收到所述控制指令后开始计时，并判断每次接收到的所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，将计数值加1；
    判断计时的时长是否达到所述预设时间段，如果计时的时长达到所述预设时间段，判断所述计数值的计数结果是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
  16. 根据权利要求14所述的方法，其特征在于，判断电路判断所述控制指令的时长是否等于预设时长，以及，判断连续接收到的有效的控制指令的次数是否大于预设次数，包括：
    判断所述控制指令的时长是否等于预设时长，如果等于或大于预设时长，则判定所述控制指令有效，将计数值加1；
    根据所述计数值的计数结果判断连续接收到的有效的控制指令的次数是否大于预设次数，如果大于或等于所述预设次数，则向所述充电电路发送断开指令。
  17. 根据权利要求13所述的方法，其特征在于，还包括：
    根据接收到的第一调整指令，调整所述预设时长、所述预设时间段和所述预设次数的值；或者，
    根据接收到的第二调整指令，调整所述预设时长和所述预设次数的值。
PCT/CN2019/117469 2018-11-13 2019-11-12 电池充满检测电路及其检测电池充满的方法、电子装置 WO2020098634A1 (zh)

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JPH06105477A (ja) * 1992-09-17 1994-04-15 Mitsubishi Electric Corp 充電回路
CN101378199A (zh) * 2007-08-31 2009-03-04 鹏智科技(深圳)有限公司 电池充电电路
CN204947662U (zh) * 2015-08-31 2016-01-06 北京煜邦电力技术股份有限公司 一种充电电路
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