CN109212424B - Battery full detection circuit, method for detecting battery full and electronic device - Google Patents
Battery full detection circuit, method for detecting battery full and electronic device Download PDFInfo
- Publication number
- CN109212424B CN109212424B CN201811345786.5A CN201811345786A CN109212424B CN 109212424 B CN109212424 B CN 109212424B CN 201811345786 A CN201811345786 A CN 201811345786A CN 109212424 B CN109212424 B CN 109212424B
- Authority
- CN
- China
- Prior art keywords
- battery
- circuit
- charging
- judging
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000000034 method Methods 0.000 title claims abstract description 34
- 238000001514 detection method Methods 0.000 title claims abstract description 28
- 238000007600 charging Methods 0.000 claims abstract description 97
- 238000010277 constant-current charging Methods 0.000 description 7
- 238000010280 constant potential charging Methods 0.000 description 5
- HBBGRARXTFLTSG-UHFFFAOYSA-N Lithium ion Chemical compound [Li+] HBBGRARXTFLTSG-UHFFFAOYSA-N 0.000 description 4
- 229910001416 lithium ion Inorganic materials 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 238000004146 energy storage Methods 0.000 description 3
- 230000007423 decrease Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
- G01R19/16533—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application
- G01R19/16538—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies
- G01R19/16542—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values characterised by the application in AC or DC supplies for batteries
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0031—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using battery or load disconnect circuits
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/00302—Overcharge protection
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The invention provides a battery full detection circuit, a method for detecting battery full, and an electronic device, wherein a first resistor is connected in series between a battery and a charging circuit for charging the battery; the operational amplifier amplifies the voltage at two ends of the first resistor and outputs the amplified voltage to the comparator; the second input end of the comparator is connected with the reference voltage end, and the comparator is used for comparing the amplified voltage with the reference voltage and outputting a control instruction to the judging circuit when the amplified voltage is smaller than the reference voltage; the judging circuit judges whether the duration of the control instruction is equal to or longer than a preset duration, if so, the control instruction is judged to be effective, and judges whether the number of times of continuously received effective control instructions is greater than or equal to a preset number of times, if so, the battery is judged to be fully charged, and if so, the battery is judged to be not fully charged, so that whether the battery is fully charged can be accurately judged.
Description
Technical Field
The invention relates to the technical field of battery charging, in particular to a battery full-charge detection circuit, a method for detecting full charge of a battery and an electronic device.
Background
Lithium ion batteries have been widely used in the fields of electric automobiles, energy storage power stations, smart phones, notebook computers, and the like, due to their advantages of high voltage, high energy density, high safety, low self-discharge rate, and the like.
The charging process of a lithium ion battery can be divided into four phases: a trickle charge phase (precharge phase), a constant current charge phase, a constant voltage charge phase, and a charge termination phase.
As shown in fig. 1, the trickle charge phase is performed by first precharging (restorative charge) the fully discharged battery with trickle charge. Trickle charging is employed when the battery voltage is below about 3V, with the trickle charging current being one tenth of the constant current charging current. Taking a constant charging current equal to 1A as an example, the trickle charging current is 100mA.
And in the constant-current charging stage, when the voltage of the battery rises above the trickle charging threshold, the charging current is increased to perform constant-current charging. The current of constant current charging is between 0.2C and 1.0C. The voltage of the battery is gradually increased along with the constant current charging process, and the voltage set by a single battery is generally 3.0V-4.2V.
And a constant voltage charging stage, wherein when the voltage of the battery rises to 4.2V, the constant current charging is ended, and the constant voltage charging stage is started. The current is gradually reduced from a maximum value as the charging process continues according to the saturation degree of the battery cell, and the charging is considered to be terminated when the current is reduced to 0.01C. Where C is a representation of the nominal capacity of the battery against the current, e.g., the battery is a capacity of 1000mAh, and 1C is the charging current of 1000mA.
In the charge termination phase, there are two typical charge termination judging methods: a minimum charge current determination method and a timer determination method. The minimum charge current judgment method monitors the charge current in the constant voltage charge stage and terminates the charge when the charge current decreases to 0.02C to 0.07C. The timer judgment method counts time from the start of the constant voltage charging stage, and the charging process is terminated after the charging is continued for two hours.
However, both methods cannot accurately judge whether the battery is full, overshoot is easily performed on the battery, and the service life of the battery is greatly affected.
Disclosure of Invention
In view of the above, the present invention provides a battery full detection circuit, a method for detecting full of a battery, and an electronic device, so as to solve the problem that in the prior art, whether the battery is full cannot be accurately determined.
In order to achieve the above purpose, the present invention provides the following technical solutions:
A battery full detection circuit comprises a first resistor, an operational amplifier, a comparator, a second resistor and a judging circuit;
The first resistor is connected in series between a battery and a charging circuit for charging the battery;
the first input end of the operational amplifier is connected with the first end of the first resistor, the second input end of the operational amplifier is connected with the second end of the first resistor, and the operational amplifier is used for amplifying the voltage at the two ends of the first resistor and outputting the amplified voltage to the comparator;
The first end of the second resistor is connected with the output end of the operational amplifier, and the second end of the second resistor is grounded;
The first input end of the comparator is connected with the output end of the operational amplifier, the second input end of the comparator is connected with a reference voltage end, and the comparator is used for comparing the amplified voltage with the reference voltage and outputting a control instruction to the judging circuit when the amplified voltage is smaller than the reference voltage;
The input end of the judging circuit is connected with the output end of the comparator, the judging circuit is used for judging whether the duration of the control instruction is equal to a preset duration, if the duration is equal to or greater than the preset duration, judging that the control instruction is effective, judging whether the number of times of continuously received effective control instructions is greater than a preset number of times, if the number of times is greater than or equal to the preset number of times, judging that the battery is fully charged, and if the number of times is less than the preset number of times, judging that the battery is not fully charged.
Optionally, the judging circuit is further configured to send an off instruction to the charging circuit to control the charging circuit to stop charging the battery when it is judged that the battery is fully charged.
Optionally, the judging circuit includes a first counter and a second counter;
The input end of the first counter is connected with the output end of the comparator, the output end of the first counter is connected with the input end of the second counter, and the output end of the second counter is connected with the charging circuit;
the first counter is used for judging whether the duration of the control instruction is equal to a preset duration, if so, judging that the control instruction is effective, and outputting a first instruction to the second counter;
The second counter is used for adding 1 to the count value after receiving the first instruction, judging whether the number of times of continuously received effective control instructions is larger than a preset number of times, and sending a disconnection instruction to the charging circuit if the number of times of continuously received effective control instructions is larger than or equal to the preset number of times.
Optionally, the judging circuit is further configured to adjust the values of the preset duration and the preset times according to the received adjustment instruction.
An electronic device comprises a battery and a charging chip, wherein the charging chip comprises a charging circuit and a battery full detection circuit;
the charging circuit is used for charging the battery;
the battery full detection circuit is any one of the battery full detection circuits described above.
Optionally, the system further comprises a main controller;
the main controller is connected with the judging circuit of the battery full detection circuit and is used for inputting an adjusting instruction to the judging circuit according to the power consumption condition of the electronic device so as to adjust the values of the preset duration and the preset times.
A method of detecting battery fullness, applied to the battery fullness detection circuit of any one of the above, comprising:
the operational amplifier amplifies the voltage at two ends of the first resistor;
the comparator compares the amplified voltage of the operational amplifier with a reference voltage, and outputs a control instruction when the amplified voltage is smaller than the reference voltage;
The judging circuit judges whether the duration of the control instruction is equal to a preset duration, if the duration is equal to or greater than the preset duration, the control instruction is judged to be effective, whether the number of times of continuously received effective control instructions is greater than a preset number of times is judged, if the number of times is greater than or equal to the preset number of times, the battery is judged to be fully charged, and if the number of times is less than the preset number of times, the battery is judged to be not fully charged.
Optionally, after determining that the battery has been fully charged, the method further includes:
the judging circuit sends an opening instruction to the charging circuit to control the charging circuit to stop charging the battery.
Optionally, the judging circuit includes a first counter and a second counter, and the judging circuit judges whether the duration of the control instruction is equal to a preset duration, and judges whether the number of times of continuously received valid control instructions is greater than a preset number of times, including:
The first counter judges whether the duration of the control instruction is equal to a preset duration, if so, the control instruction is judged to be effective, and the first instruction is output to the second counter;
and the second counter increases the count value by 1 after receiving the first instruction, judges whether the number of times of continuously received effective control instructions is greater than a preset number of times, and sends a disconnection instruction to the charging circuit if the number of times of continuously received effective control instructions is greater than or equal to the preset number of times.
Optionally, the method further comprises:
and the judging circuit adjusts the values of the preset duration and the preset times according to the received adjustment instruction.
Compared with the prior art, the technical scheme provided by the invention has the following advantages:
According to the battery full detection circuit, the method for detecting the full of the battery and the electronic device, the first resistor is connected in series between the battery and the charging circuit, so that the current in the first resistor is equal to the charging current of the battery. By judging whether the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the charging current of the battery is smaller than the cut-off threshold value can be judged, so that when the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the battery is fully charged can be judged;
When the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the battery is fully charged or not can be accurately judged by judging whether the generated control command is an effective control command or not and judging whether the number of times of continuously received effective control commands is larger than the preset number of times, and the problem that the battery is fully charged or not due to noise and the like is avoided.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings that are required to be used in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only embodiments of the present invention, and that other drawings can be obtained according to the provided drawings without inventive effort for a person skilled in the art.
FIG. 1 is a schematic diagram of a charging process for 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 an electronic device according to an embodiment of the present invention;
fig. 4 is a flowchart of a method for detecting battery full according to an embodiment of the present invention.
Detailed Description
The foregoing is a core idea of the present invention, and in order that the above-mentioned objects, features and advantages of the present invention can be more clearly understood, a technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
The embodiment of the invention provides a battery full-charge detection circuit which is applied to an electronic device with a battery, wherein the electronic device can be a smart phone, a notebook computer, an electric automobile, an energy storage power station and the like.
As shown in fig. 2, the battery full detection circuit provided by the embodiment of the invention comprises a first resistor 3, an operational amplifier 4, a comparator 5, a judging circuit 6 and a second resistor 7.
Wherein the first resistor 3 is connected in series between the battery 1 and the charging circuit 2 for charging the battery 1. It should be noted that, the battery 1 in the embodiment of the present invention may be a lithium ion battery, or may be another rechargeable battery, and the present invention is not limited thereto. The charging circuit 2 is configured to receive a supply current from a charger and charge the battery 1 with the supply current.
The first input end of the operational amplifier 4 is connected to the first end of the first resistor 3, the second input end of the operational amplifier 4 is connected to the second end of the first resistor 3, and the operational amplifier 4 is configured to amplify the voltages at two ends of the first resistor 3 and output the amplified voltages to the comparator 5.
The first end of the second resistor 7 is connected with the output end of the operational amplifier 4, and the second end of the second resistor 7 is grounded, wherein the second resistor 7 is a load resistor.
The first input end of the comparator 5 is connected with the output end of the operational amplifier 4, the second input end of the comparator 5 is connected with the reference voltage end Vref, and the comparator 5 is used for comparing the amplified voltage with the reference voltage and outputting a control instruction to the judging circuit 6 when the amplified voltage is smaller than the reference voltage.
The input end of the judging circuit 6 is connected with the output end of the comparator 5, the judging circuit 6 is used for judging whether the duration of the control instruction is equal to or longer than the preset duration, if the duration is equal to or longer than the preset duration, the control instruction is judged to be effective, if the duration is shorter than the preset duration, the control instruction is judged to be ineffective, the number of times of the effective control instruction is cleared, whether the number of times of the continuously received effective control instruction is greater than the preset number of times is judged, if the number of times of the continuously received effective control instruction is greater than or equal to the preset number of times, the battery 1 is judged to be fully charged, and if the number of times of the continuously received effective control instruction is smaller than the preset number of times, the battery 1 is judged to be not fully charged.
On the basis of the above embodiment, the judgment circuit 6 in the embodiment of the present invention is further configured to send an off instruction to the charging circuit 2 to control the charging circuit 2 to stop charging the battery 1 when it is judged that the battery 1 is fully charged. It should be noted that 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 opened, the charging circuit 2 no longer charges the battery 1.
In the embodiment of the present invention, the judging circuit 6 includes a first counter and a second counter;
The input end of the first counter is connected with the output end of the comparator 5, the output end of the first counter is connected with the input end of the second counter, and the output end of the second counter is connected with the charging circuit 2;
The first counter is used for judging whether the duration of the control instruction is equal to the preset duration, if so, judging that the control instruction is effective, and outputting the first instruction to the second counter;
the second counter is used for adding 1 to the count value after receiving the first instruction, judging whether the number of times of continuously received effective control instructions is larger than the preset number of times, and if so, sending a disconnection instruction to the charging circuit.
Of course, the present invention is not limited to this, and in other embodiments, the determination circuit 6 may also implement the above-described functions through other logic devices.
On the basis of the above embodiment, the judging circuit 6 in the embodiment of the present invention is further configured to adjust the values of the preset duration and the preset number of times according to the received adjustment instruction, so as to more accurately determine that the battery 1 is fully charged.
For example, when the mobile phone is used while being charged, the charging current is often unable to reach the cut-off threshold value, so that the charging cannot be stopped.
In the embodiment of the invention, the charging process of the battery 1 includes four stages of 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 is slowly reduced and is smaller than a cutoff threshold, i.e. the trickle charging current threshold, the first resistor 3 is connected in series between the battery 1 and the charging circuit 2, and the current in the first resistor 3 is equal to the charging current of the battery 1, so that the voltage across the amplified first resistor 3 is smaller than the reference voltage, and at this time, the comparator 5 is turned over and outputs the control command Iterm.
In the actual charging process, the charging current is not monotonically gradually reduced, and because of noise in the charging current, the charging current fluctuates around the cut-off threshold, so that the voltage at two ends of the amplified first resistor 3 fluctuates around the reference voltage, the comparator 5 turns back and forth, and the control command Iterm is output for 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, which indicates that the charging current of the battery 1 is less than the cutoff threshold, and indicates that the battery 1 is fully charged.
Based on this, in order to eliminate noise interference that does not satisfy the requirement of the preset duration, in the embodiment of the present invention, the judging circuit judges whether the duration of the control instruction Iterm is equal to the preset duration, so as to judge whether the control instruction Iterm is a valid control instruction. And further judges whether the number of times of continuously received effective control instructions Iterm is greater than a preset number of times to accurately judge whether the battery 1 is fully charged.
In one embodiment of the present invention, the determining circuit 6 determines whether the control command Iterm is a valid control command when the first control command Iterm arrives, and if the duration of the control command Iterm is longer than the preset duration L, the control command Iterm is valid, and the statistical number of the control command Iterm is increased by 1; if the duration of the control command Iterm is less than the preset duration L, the control command Iterm is an invalid control command, and the statistics of the control command Item is cleared.
If the counted number of times of the valid control command Iterm reaches the preset number of times N, the judging circuit 6 judges that the battery 1 is fully charged, and the judging circuit 6 sends an off command to the charging circuit 2 to control the charging circuit 2 to stop charging the battery 1. If the counted number of times of the valid control command Iterm does not reach the preset number of times N, the judgment circuit 6 will not output the disconnection command, and the charging circuit 2 will continue to charge the battery 1.
If the control command Iterm with the duration smaller than the preset duration L appears in the counting process, it indicates that the battery 1 outputs a large current to the load or the CPU of the electronic device, etc., the counting times of the control command Iterm are cleared, so as to effectively prevent the battery 1 from ending charging when not fully charged. Based on this, in the present invention, by judging whether the number of times of continuously received effective control instructions is greater than the preset number of times, it is possible to avoid the end of charging when the battery 1 is not fully charged.
The embodiment of the invention also provides an electronic device which can be a smart phone, a notebook computer, an electric automobile, an energy storage power station and the like, and as shown in fig. 3, the electronic device comprises a battery 1 and a charging chip, wherein the charging chip comprises a charging circuit 2 and the battery full charge detection circuit provided by any embodiment. The charging circuit 2 is a circuit for charging the battery 1.
The electronic device in the embodiment of the invention comprises a main controller 8, wherein the main controller 8 is a CPU (Central Processing Unit/Processor, central processing unit) of the electronic device. The main controller 8 is connected to the judging circuit 6 of the battery full detection circuit, and is configured to input an adjustment command to the judging circuit 6 according to the power consumption condition of the electronic device, so as to adjust the values of the preset duration and the preset times.
That is, the main controller 8 generates an adjustment command according to the power consumption of the electronic device, and sends the adjustment command to the determination circuit 6, and the determination circuit 6 adjusts the values of the preset time period and the preset times after receiving the adjustment command.
Specifically, the values of the preset time period and the preset times can be reduced when the power consumption of the electronic device is high, and the values of the preset time period and the preset times can be increased when the power consumption of the electronic device is low.
The embodiment of the invention also provides a method for detecting the full charge of the battery, which is applied to the battery full charge detection circuit provided by any embodiment, as shown in fig. 4, and comprises the following steps:
s1: the operational amplifier amplifies the voltage at two ends of the first resistor;
S2: the comparator compares the amplified voltage of the operational amplifier with a reference voltage, and outputs a control instruction when the amplified voltage is smaller than the reference voltage;
S3: the judging circuit judges whether the duration of the control instruction is equal to the preset duration, and if the duration is equal to or greater than the preset duration, the S4 is entered;
s4: judging that the control instruction is valid, and entering S5;
S5: the judging circuit judges whether the number of times of continuously received effective control instructions is larger than a preset number of times, if so, the S6 is entered, and if not, the S7 is entered;
S6: determining that the battery has been fully charged;
s7: and judging that the battery is not fully charged.
In order to eliminate noise interference which does not meet the requirement of the preset duration, in the embodiment of the invention, whether the control command is an effective control command is judged by judging whether the duration of the control command is equal to the preset duration through a judging circuit. And further judging whether the number of times of continuously received effective control instructions is larger than a preset number of times so as to accurately judge whether the battery is fully charged.
In an embodiment of the present invention, after determining that the battery is fully charged, the method further includes:
the judging circuit sends an off instruction to the charging circuit to control the charging circuit to stop charging the battery.
In the embodiment of the present invention, when the judging circuit includes a first counter and a second counter, the judging circuit judges whether the duration of the control instruction is equal to a preset duration, and judges whether the number of times of continuously received effective control instructions is greater than a preset number of times, including:
the first counter judges whether the duration of the control instruction is equal to the preset duration, if so, the first counter judges that the control instruction is effective and outputs the first instruction to the second counter;
the second counter increases the count value by 1 after receiving the first instruction, judges whether the number of times of continuously received effective control instructions is larger than the preset number of times, and sends a disconnection instruction to the charging circuit if the number of times of continuously received effective control instructions is larger than or equal to the preset number of times.
In the embodiment of the invention, the method further comprises the following steps:
The judging circuit adjusts the values of the preset duration and the preset times according to the received adjustment instruction.
For example, when the mobile phone is used while being charged, the charging current is often unable to reach the cut-off threshold value, so that the charging cannot be stopped.
Specifically, the values of the preset duration and the preset number of times may be reduced when the power consumption of the electronic device, such as a mobile phone, is large, and the values of the preset duration and the preset number of times may be increased when the power consumption of the electronic device is small.
According to the battery full detection circuit, the method for detecting the full of the battery and the electronic device, the first resistor is connected in series between the battery and the charging circuit, so that the current in the first resistor is equal to the charging current of the battery. By judging whether the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the charging current of the battery is smaller than the cut-off threshold value can be judged, so that when the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the battery is fully charged or not can be judged;
When the voltage at the two ends of the first resistor is smaller than the reference voltage, whether the battery is fully charged or not can be accurately judged by judging whether the generated control command is an effective control command or not and judging whether the number of times of continuously received effective control commands is larger than the preset number of times, and the problem that the battery is fully charged or not due to noise and the like is avoided.
In the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described in a different point from other embodiments, and identical and similar parts between the embodiments are all enough to refer to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant points refer to the description of the method section.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The battery full detection circuit is characterized by comprising a first resistor, an operational amplifier, a comparator, a second resistor and a judging circuit;
The first resistor is connected in series between a battery and a charging circuit for charging the battery;
the first input end of the operational amplifier is connected with the first end of the first resistor, the second input end of the operational amplifier is connected with the second end of the first resistor, and the operational amplifier is used for amplifying the voltage at the two ends of the first resistor and outputting the amplified voltage to the comparator;
The first end of the second resistor is connected with the output end of the operational amplifier, and the second end of the second resistor is grounded;
The first input end of the comparator is connected with the output end of the operational amplifier, the second input end of the comparator is connected with a reference voltage end, and the comparator is used for comparing the amplified voltage with the reference voltage and outputting a control instruction to the judging circuit when the amplified voltage is smaller than the reference voltage;
The input end of the judging circuit is connected with the output end of the comparator, the judging circuit is used for judging whether the duration of the control instruction is equal to a preset duration, if the duration is equal to or greater than the preset duration, judging that the control instruction is effective, judging whether the number of times of continuously received effective control instructions is greater than a preset number of times, if the number of times is greater than or equal to the preset number of times, judging that the battery is fully charged, and if the number of times is less than the preset number of times, judging that the battery is not fully charged.
2. The detection circuit according to claim 1, wherein the determination circuit is further configured to send an off instruction to the charging circuit to control the charging circuit to stop charging the battery when it is determined that the battery is fully charged.
3. The detection circuit of claim 2, wherein the determination circuit comprises a first counter and a second counter;
The input end of the first counter is connected with the output end of the comparator, the output end of the first counter is connected with the input end of the second counter, and the output end of the second counter is connected with the charging circuit;
the first counter is used for judging whether the duration of the control instruction is equal to a preset duration, if so, judging that the control instruction is effective, and outputting a first instruction to the second counter;
The second counter is used for adding 1 to the count value after receiving the first instruction, judging whether the number of times of continuously received effective control instructions is larger than a preset number of times, and sending a disconnection instruction to the charging circuit if the number of times of continuously received effective control instructions is larger than or equal to the preset number of times.
4. The detection circuit according to claim 1, wherein the judging circuit is further configured to adjust values of the preset time period and the preset number of times according to the received adjustment instruction.
5. An electronic device is characterized by comprising a battery and a charging chip, wherein the charging chip comprises a charging circuit and a battery full detection circuit;
the charging circuit is used for charging the battery;
the battery fullness detection circuit is the battery fullness detection circuit according to any one of claims 1 to 4.
6. The electronic device of claim 5, further comprising a master controller;
the main controller is connected with the judging circuit of the battery full detection circuit and is used for inputting an adjusting instruction to the judging circuit according to the power consumption condition of the electronic device so as to adjust the values of the preset duration and the preset times.
7. A method of detecting battery fullness, characterized by being applied to the battery fullness detection circuit of any one of claims 1 to 4, comprising:
the operational amplifier amplifies the voltage at two ends of the first resistor;
the comparator compares the amplified voltage of the operational amplifier with a reference voltage, and outputs a control instruction when the amplified voltage is smaller than the reference voltage;
The judging circuit judges whether the duration of the control instruction is equal to a preset duration, if the duration is equal to or greater than the preset duration, the control instruction is judged to be effective, whether the number of times of continuously received effective control instructions is greater than a preset number of times is judged, if the number of times is greater than or equal to the preset number of times, the battery is judged to be fully charged, and if the number of times is less than the preset number of times, the battery is judged to be not fully charged.
8. The method of claim 7, wherein after determining that the battery has been fully charged, further comprising:
the judging circuit sends an opening instruction to the charging circuit to control the charging circuit to stop charging the battery.
9. The method of claim 8, wherein the determining circuit includes a first counter and a second counter, wherein the determining circuit determines whether the duration of the control instruction is equal to a preset duration, and wherein determining whether the number of consecutively received valid control instructions is greater than a preset number of times includes:
The first counter judges whether the duration of the control instruction is equal to a preset duration, if so, the control instruction is judged to be effective, and the first instruction is output to the second counter;
and the second counter increases the count value by 1 after receiving the first instruction, judges whether the number of times of continuously received effective control instructions is greater than a preset number of times, and sends a disconnection instruction to the charging circuit if the number of times of continuously received effective control instructions is greater than or equal to the preset number of times.
10. The method as recited in claim 7, further comprising:
and the judging circuit adjusts the values of the preset duration and the preset times according to the received adjustment instruction.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345786.5A CN109212424B (en) | 2018-11-13 | 2018-11-13 | Battery full detection circuit, method for detecting battery full and electronic device |
| PCT/CN2019/117469 WO2020098634A1 (en) | 2018-11-13 | 2019-11-12 | Circuit for detecting full charge of battery and method for detecting full charge of battery, and electronic device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811345786.5A CN109212424B (en) | 2018-11-13 | 2018-11-13 | Battery full detection circuit, method for detecting battery full and electronic device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109212424A CN109212424A (en) | 2019-01-15 |
| CN109212424B true CN109212424B (en) | 2024-05-07 |
Family
ID=64995336
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811345786.5A Active CN109212424B (en) | 2018-11-13 | 2018-11-13 | Battery full detection circuit, method for detecting battery full and electronic device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109212424B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2020098634A1 (en) * | 2018-11-13 | 2020-05-22 | 上海艾为电子技术股份有限公司 | Circuit for detecting full charge of battery and method for detecting full charge of battery, and electronic device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0550389A1 (en) * | 1991-12-02 | 1993-07-07 | FIAT AUTO S.p.A. | A device for detecting the condition of batteries, particularly on board motor vehicles |
| US5691624A (en) * | 1995-04-24 | 1997-11-25 | Samsung Electronics Co., Ltd. | Method and apparatus for detecting a full-charge condition while charging a battery |
| JP2006050812A (en) * | 2004-08-05 | 2006-02-16 | Sony Corp | Method for determining full charge of battery, charging system, and charger |
| CN101378199A (en) * | 2007-08-31 | 2009-03-04 | 鹏智科技(深圳)有限公司 | Charging circuit for battery |
| CN104348194A (en) * | 2013-07-26 | 2015-02-11 | 无锡华润矽科微电子有限公司 | Electric vehicle charging control circuit and calibration method thereof |
| CN108336785A (en) * | 2018-02-09 | 2018-07-27 | 河北工业职业技术学院 | Battery sharing method, device and system |
| CN108462230A (en) * | 2018-03-21 | 2018-08-28 | 嘉兴飞童电子科技有限公司 | A kind of lithium battery charging management circuit and management method |
| CN108594129A (en) * | 2018-04-26 | 2018-09-28 | 成都航博新能科技有限公司 | A kind of battery detection circuit |
| CN108649658A (en) * | 2018-06-14 | 2018-10-12 | Oppo（重庆）智能科技有限公司 | The switching method of more batteries, for electric installation, electronic equipment |
| CN209356649U (en) * | 2018-11-13 | 2019-09-06 | 上海艾为电子技术股份有限公司 | Battery full charge testing circuit, electronic device |
-
2018
- 2018-11-13 CN CN201811345786.5A patent/CN109212424B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0550389A1 (en) * | 1991-12-02 | 1993-07-07 | FIAT AUTO S.p.A. | A device for detecting the condition of batteries, particularly on board motor vehicles |
| US5691624A (en) * | 1995-04-24 | 1997-11-25 | Samsung Electronics Co., Ltd. | Method and apparatus for detecting a full-charge condition while charging a battery |
| JP2006050812A (en) * | 2004-08-05 | 2006-02-16 | Sony Corp | Method for determining full charge of battery, charging system, and charger |
| CN101378199A (en) * | 2007-08-31 | 2009-03-04 | 鹏智科技(深圳)有限公司 | Charging circuit for battery |
| CN104348194A (en) * | 2013-07-26 | 2015-02-11 | 无锡华润矽科微电子有限公司 | Electric vehicle charging control circuit and calibration method thereof |
| CN108336785A (en) * | 2018-02-09 | 2018-07-27 | 河北工业职业技术学院 | Battery sharing method, device and system |
| CN108462230A (en) * | 2018-03-21 | 2018-08-28 | 嘉兴飞童电子科技有限公司 | A kind of lithium battery charging management circuit and management method |
| CN108594129A (en) * | 2018-04-26 | 2018-09-28 | 成都航博新能科技有限公司 | A kind of battery detection circuit |
| CN108649658A (en) * | 2018-06-14 | 2018-10-12 | Oppo（重庆）智能科技有限公司 | The switching method of more batteries, for electric installation, electronic equipment |
| CN209356649U (en) * | 2018-11-13 | 2019-09-06 | 上海艾为电子技术股份有限公司 | Battery full charge testing circuit, electronic device |
Non-Patent Citations (1)
| Title |
|---|
| 一种在线检测和显示蓄电池状况的UPS;杨春梅;《中国优秀硕士学位论文全文数据库 工程科技Ⅱ辑》(第10期);C042-214 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109212424A (en) | 2019-01-15 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US9018902B2 (en) | Rechargeable battery charging method, charging control apparatus, and battery pack | |
| CN107894567B (en) | Battery pack and detection system and detection method for interface state of battery pack | |
| US11290801B2 (en) | Headset charging system and headset charging method | |
| CN109921118B (en) | Battery charging current control method and system | |
| CN209311656U (en) | Battery full charge testing circuit, electronic device | |
| CN109212422B (en) | Battery full detection circuit, method for detecting battery full and electronic device | |
| CN209356648U (en) | Battery full charge testing circuit, electronic device | |
| CN101986502A (en) | Mobile phone battery charging circuit | |
| US11251638B2 (en) | Method and device for charging aluminum battery | |
| US11453305B2 (en) | Vehicle charge system and charge control method | |
| US9929582B2 (en) | Adaptive charge current for a battery | |
| CN109212424B (en) | Battery full detection circuit, method for detecting battery full and electronic device | |
| CN109212423B (en) | Battery full detection circuit, method for detecting battery full and electronic device | |
| CN209356649U (en) | Battery full charge testing circuit, electronic device | |
| US10312701B2 (en) | Charging method and portable electronic device using the same | |
| CN112736311B (en) | Storage battery charging method and device and electronic equipment | |
| US6459239B1 (en) | Method and apparatus for recharging batteries in the presence of a load current | |
| WO2007016248A1 (en) | System and method for monitoring power supplied to a battery | |
| US5625274A (en) | Method for fast charging of different types of batteries | |
| CN204497782U (en) | A kind of portable power source | |
| JP2009189131A (en) | Charging control circuit, battery pack, and charging system | |
| JP3423008B2 (en) | How to charge the battery | |
| WO2020098634A1 (en) | Circuit for detecting full charge of battery and method for detecting full charge of battery, and electronic device | |
| CN111884292A (en) | Intelligent charger capable of automatically identifying external adapter and charging method | |
| CN104901363A (en) | Activation circuit and method for battery of mobile equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |