CN105277889A - Circuit device for detecting battery capacity through intermittent pulse discharge - Google Patents
Circuit device for detecting battery capacity through intermittent pulse discharge Download PDFInfo
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- CN105277889A CN105277889A CN201510157343.3A CN201510157343A CN105277889A CN 105277889 A CN105277889 A CN 105277889A CN 201510157343 A CN201510157343 A CN 201510157343A CN 105277889 A CN105277889 A CN 105277889A
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Abstract
The present invention discloses a circuit device for detecting a battery capacity through intermittent pulse discharge. The device comprises a microprocessor, a transistor (Q) and a sense resistor (Rt). One end of the sense resistor is connected with an analog/digital converter port, a positive electrode of a battery and one end of a load, the other end of the sense resistor is connected with a collector electrode of the transistor, a base electrode of the transistor is connected with a control port of the microprocessor, an emitting electrode of the transistor is connected with a negative electrode of the battery and the other end of the load, and the ratio of the resistance of the sense resistor and resistance of the load is 1/5-1/10. During working, the microprocessor provides a transient high-level pulse for the control port at intervals of a pause time slot so as to enable the transistor to be in instantaneous saturation conduction and be cut off, and the width of the pause time slot is a hundred thousand times of that of the high-level pulse. According to the above technical scheme of carrying out real-time operation detection on the remaining battery capacity through an intermittent pulse discharge method, the aims of accurate detection and real-time operation detection of the remaining battery capacity are achieved.
Description
Technical field
The present invention relates to the device detecting battery electric quantity, specifically referring to the circuit arrangement of a kind of intermittent pulse discharge examination battery electric quantity for detecting battery surplus electricity in real time.
Background technology
Battery is the power resources of a lot of outdoor facilities, and electric automobile is the direction of future automobile development, is also finally to use battery as power source.But the subject matter that battery exists is, when battery power can reduce suddenly close to output voltage when exhausting, allows people be taken by surprise and have little time to take emergency measures.Therefore the Real-Time Monitoring of battery power is just seemed very important.
Battery described herein is defined as accumulator or rechargeable battery, prior art adopts voltage table to carry out approximate estimation in real time to the electric energy of battery, namely, at the electrode tip of a battery voltage table in parallel, roughly estimated the surplus electricity of battery by the terminal voltage change detecting battery, this method is called voltage method; Prior art also has the surplus electricity adopting discharger to detect battery, namely, the metallic resistance of voltage table is parallel with one, the positive and negative electrode of parallel contact battery, through of short duration, be close to short circuit ground heavy-current discharge, reading on voltage table is amounted to into the surplus electricity of electricity to battery and carry out approximate estimation, this method is called that electric discharge also claims current method;
Terminal voltage due to battery determined by the electromotive force of its inner positive and negative electrode material, and the electromotive force of each material determined by the atom of each material, is therefore that determine, constant; The voltage change that voltage method measures, the change of inside battery electrochemical reaction process in fact, the change of the change of the internal resistance of cell and the current capacity of output, the terminal voltage change of battery only has and just suddenly displays when the surplus electricity of battery is close to exhaustion, allows people be taken by surprise; Therefore voltage method correctly can not reflect the actual surplus electricity of battery;
Although the electricity amounted to of electric discharge is close to the actual surplus electricity of battery, because electric discharge needs to consume a large amount of electric energy, and inside battery can be made to produce high heat, therefore the maintaining that electric discharge can only be used for battery usually detects, and can not be used for detection battery being carried out to real time execution; Therefore, there are the problems and shortcomings that detection is inaccurate, can not carry out real time execution detection to battery in prior art.
Summary of the invention
For above-mentioned prior art Problems existing with not enough, the present invention adopts the circuit arrangement be made up of microprocessor, transistor, detection resistance, wherein, detect the analog/digital converter interface of one end with microprocessor of resistance, the positive pole of battery and one end of load to be connected, detect the other end of resistance to be connected with the collector of transistor, the base stage of transistor is connected with microprocessor-based control port, and the emitter of transistor is connected with the other end of the negative pole of battery and load; Detecting the resistance of resistance is 1/5 ~ 1/10 with the ratio of the resistance of load; During work, microprocessor provides an of short duration high level pulse make transistor moment saturation conduction and end at interval of a stop time section to control port, battery is resistance high current pulsed discharge after testing, and the heavy current pulse pulse voltage data that resistance produces after testing feed back to microprocessor processes through analog/digital converter interface and show; Wherein, described stop time section width is 100,000 times of high-level pulse width; Because the resistance detecting resistance is less than the resistance of load, and because high level pulse is less than stop time section, namely the dutycycle of pulse is minimum, the moment electric energy that heavy current pulse consumes is minimum, and during the voltage drop that heavy current pulse produces, compole is short and do not affect battery to load normal power supply; The surplus electricity of mode to battery of intermittent pulse electric discharge is adopted to carry out the technical scheme of real time execution detection, a kind of circuit arrangement of intermittent pulse discharge examination battery electric quantity is provided, be intended to make the detection to battery surplus electricity, reach the object detecting accurately, can carry out real time execution detection.
The object of the present invention is achieved like this: a kind of circuit arrangement of intermittent pulse discharge examination battery electric quantity, comprises microprocessor, transistor, detection resistance, wherein: described microprocessor is general single chip;
Described transistor is NPN triode;
Described detection resistance is by the cylindrical screw shape resistance of nichrome wire coiling, and the resistance value detecting resistance is 1/5 ~ 1/10 of the resistance value of load;
The one end detecting resistance is connected with one end of the analog/digital converter interface of microprocessor, the positive pole of battery and load RL, detect the other end of resistance to be connected with the collector of transistor, the base stage of transistor is connected with microprocessor-based control port, and the emitter of transistor is connected with the other end of the negative pole of battery and load.
Principle of work and beneficial effect
During work, microprocessor provides an of short duration high level pulse make transistor moment saturation conduction and end instantaneously at interval of a stop time section to control port, battery after testing resistance and transistor high current pulsed discharge also ends instantaneously, and the heavy current pulse pulse voltage drop data that resistance produces after testing feeds back to microprocessor processes through analog/digital converter interface and shown; Wherein, described stop time section width is 10 seconds, and described high-level pulse width is 100 microseconds;
Because the resistance detecting resistance is less than the resistance of load, therefore the high current pulsed discharge of battery resistance and transistor is after testing detecting the pulse voltage drop data that resistance produces and is corresponding to the current output capability of battery at that time, that is, the electric quantity data that heavy current pulse voltage drop is amounted to reflects the surplus electricity of battery at that time exactly; Due to 100,000 times that described stop time section width is high-level pulse width, namely the dutycycle of high level pulse is minimum, therefore, the moment electric energy that heavy current pulse consumes is also minimum, minimum negligible on the impact of the surplus electricity of battery, meanwhile, the heat detecting resistance generation is also minimum, and has time enough to dispel the heat; Due to heavy current pulse produce voltage drop time compole short, therefore do not affect battery and run to load normal power supply.
This apparatus structure is simple, and reliable operation is with low cost, makes the detection to battery electric quantity, accurately can reflect actual surplus electricity, can carry out real time execution detection; Can be used for such as electric automobile, the surplus electricity of the vehicle such as electric bicycle, electrocar to on-vehicle battery carries out real time execution detection;
Beneficial design is expanded
The described transistor of this device also can adopt Darlington transistor, and described detection resistance also can adopt Chip-R element.
Above-mentioned, the present invention adopts the circuit arrangement be made up of microprocessor, transistor, detection resistance, wherein, detect the analog/digital converter interface of one end with microprocessor of resistance, the positive pole of battery and one end of load to be connected, detect the other end of resistance to be connected with the collector of transistor, the base stage of transistor is connected with microprocessor-based control port, and the emitter of transistor is connected with the other end of the negative pole of battery and load; Detecting the resistance of resistance is 1/5 ~ 1/10 with the ratio of the resistance of load; During work, microprocessor provides an of short duration high level pulse make transistor moment saturation conduction and end at interval of a stop time section to control port, battery is resistance high current pulsed discharge after testing, and the heavy current pulse pulse voltage data that resistance produces after testing feed back to microprocessor processes through analog/digital converter interface and show; Wherein, described stop time section width is 100,000 times of high-level pulse width; Because the resistance detecting resistance is less than the resistance of load, and because high level pulse is less than stop time section, namely the dutycycle of pulse is minimum, the moment electric energy that heavy current pulse consumes is minimum, and during the voltage drop that heavy current pulse produces, compole is short and do not affect battery to load normal power supply; The surplus electricity of mode to battery of intermittent pulse electric discharge is adopted to carry out the technical scheme of real time execution detection, overcome prior art and there are the problems and shortcomings that detection is inaccurate, can not carry out real time execution detection to battery, the circuit arrangement of a kind of intermittent pulse discharge examination battery electric quantity provided, make the detection to battery surplus electricity, reach the object detecting accurately, can carry out real time execution detection.
Accompanying drawing explanation
Fig. 1 is the circuit theory schematic diagram of the circuit arrangement of a kind of intermittent pulse discharge examination battery electric quantity of the present invention.
Below in conjunction with the embodiment in accompanying drawing, the present invention is described in further detail, but should not be construed as any limitation of the invention.
In figure: detect resistance Rt, transistor Q, battery BT, load RL, analog/digital converter interface MCU-ADC, control port MCU.
Embodiment
Consult Fig. 1, the circuit arrangement of a kind of intermittent pulse discharge examination battery electric quantity of the present invention, comprise microprocessor, transistor Q, detect resistance Rt, wherein: described microprocessor is general single chip;
Described transistor Q is NPN triode;
Described detection resistance Rt is by the cylindrical screw shape resistance of nichrome wire coiling, and the resistance value detecting resistance Rt is 1/5 ~ 1/10 of the resistance value of load RL;
Detect the analog/digital converter interface MCU-ADC of one end with microprocessor of resistance Rt, the positive pole of battery BT and one end of load RL to be connected, the other end detecting resistance Rt is connected with the collector of transistor Q, the base stage of transistor Q is connected with microprocessor-based control port MCU, and the emitter of transistor Q is connected with the other end of the negative pole of battery BT and load RL.
Principle of work and beneficial effect
During work, microprocessor provides an of short duration high level pulse make transistor Q moment saturation conduction and end instantaneously at interval of a stop time section to control port MCU, battery BT after testing resistance Rt and transistor Q high current pulsed discharge also ends instantaneously, and the heavy current pulse pulse voltage drop data that resistance Rt produces after testing feeds back to microprocessor processes through analog/digital converter interface MCU-ADC and shown; Wherein, described stop time section width is 10 seconds, and described high-level pulse width is 100 microseconds;
Because the resistance detecting resistance Rt is less than the resistance of load RL, therefore the high current pulsed discharge of battery BT resistance Rt and transistor Q is after testing detecting the pulse voltage drop data that resistance Rt produces and is corresponding to the current output capability of battery BT at that time, that is, the electric quantity data that heavy current pulse voltage drop is amounted to reflects the surplus electricity of battery BT at that time exactly; Due to 100,000 times that described stop time section width is high-level pulse width, namely the dutycycle of high level pulse is minimum, therefore, the moment electric energy that heavy current pulse consumes is also minimum, minimum negligible on the impact of the surplus electricity of battery BT, meanwhile, the heat detecting resistance Rt generation is also minimum, and has time enough to dispel the heat; Due to heavy current pulse produce voltage drop time compole short, therefore do not affect battery BT and run to load RL normal power supply.
This apparatus structure is simple, and reliable operation is with low cost, makes the detection to battery electric quantity, accurately can reflect actual surplus electricity, can carry out real time execution detection; Can be used for such as electric automobile, the surplus electricity of the vehicle such as electric bicycle, electrocar to on-vehicle battery carries out real time execution detection;
Beneficial design is expanded
The described transistor Q of this device also can adopt Darlington transistor, and described detection resistance Rt also can adopt Chip-R element.
Claims (1)
1. a circuit arrangement for intermittent pulse discharge examination battery electric quantity, comprises microprocessor, transistor (Q), detects resistance (Rt), it is characterized in that: described microprocessor is general single chip;
Described transistor (Q) is NPN triode;
Described detection resistance (Rt) is by the cylindrical screw shape resistance of nichrome wire coiling, and the resistance value detecting resistance (Rt) is 1/5 ~ 1/10 of the resistance value of load (RL);
Detect one end and the analog/digital converter interface MCU-ADC of microprocessor of resistance (Rt), one end of the positive pole of battery (BT) and load (RL) is connected, the other end detecting resistance (Rt) is connected with the collector of transistor (Q), the base stage of transistor (Q) is connected with microprocessor-based control port (MCU), and the emitter of transistor (Q) is connected with the other end of the negative pole of battery (BT) and load (RL).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201510157343.3A CN105277889A (en) | 2015-03-28 | 2015-03-28 | Circuit device for detecting battery capacity through intermittent pulse discharge |
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| CN201510157343.3A CN105277889A (en) | 2015-03-28 | 2015-03-28 | Circuit device for detecting battery capacity through intermittent pulse discharge |
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Cited By (5)
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| CN106405424A (en) * | 2016-08-19 | 2017-02-15 | 上海绿耳新能源科技有限公司 | Method and device for metering residual electric quantity of lithium ion battery |
| CN108254691A (en) * | 2016-12-28 | 2018-07-06 | 硅谷实验室公司 | Charge measurement in the system for the DC-DC converter for using pulse frequency modulated |
| CN110794315A (en) * | 2019-08-06 | 2020-02-14 | 厦门亿联网络技术股份有限公司 | Method for detecting electric quantity of rechargeable battery |
| US10996281B2 (en) | 2016-12-28 | 2021-05-04 | Silicon Laboratories Inc. | Charge measurement calibration in a system using a pulse frequency modulated DC-DC converter |
| US11362531B2 (en) | 2017-01-05 | 2022-06-14 | SZ DJI Technology Co., Ltd. | Audio adjustment method and electronic device thereof |
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| US11362531B2 (en) | 2017-01-05 | 2022-06-14 | SZ DJI Technology Co., Ltd. | Audio adjustment method and electronic device thereof |
| CN110794315A (en) * | 2019-08-06 | 2020-02-14 | 厦门亿联网络技术股份有限公司 | Method for detecting electric quantity of rechargeable battery |
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