CN110912105A - High-low voltage protection circuit for power supply voltage range detection - Google Patents
High-low voltage protection circuit for power supply voltage range detection Download PDFInfo
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- CN110912105A CN110912105A CN201911022794.0A CN201911022794A CN110912105A CN 110912105 A CN110912105 A CN 110912105A CN 201911022794 A CN201911022794 A CN 201911022794A CN 110912105 A CN110912105 A CN 110912105A
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- protection circuit
- power supply
- resistor
- resistance
- detection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H11/00—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result
- H02H11/006—Emergency protective circuit arrangements for preventing the switching-on in case an undesired electric working condition might result in case of too high or too low voltage
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- 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
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
Abstract
The invention provides a high-low voltage protection circuit for detecting a power supply voltage range, which comprises an automobile storage battery power supply input end, an AD detection end, three resistors R1-R3, a diode D1 and an electrostatic impedor ESD1, wherein the resistor R1, the resistor R2 and the diode D1 are connected in series and then are arranged between the automobile storage battery power supply input end and the AD detection end, conduction points are arranged between the resistor R1 and the resistor R2, the number of the conduction points is two, one conduction point is connected in series with the ESD impedor ESD1 and then is grounded, and the other conduction point is connected in series with the resistor R3 and then is grounded. The detection of the power supply voltage input range is realized through a software AD sampling mode, the circuit design is simple, the cost is low, the platform transplantation condition and different voltage range requirements are met, hardware does not need to be produced again, the detection can be realized only by configuring software on line, and the characteristics of stability, reliability and strong anti-interference performance are achieved.
Description
Technical Field
The invention relates to the technical field of automobile batteries, in particular to a high-low voltage protection circuit for detecting a power supply voltage range.
Background
At present in the new energy automobile field, need carry out the scope to mains voltage and detect, and need protect high-low pressure when detecting, realize the detection of mains voltage input scope through hardware detection mode at present, but present detection circuitry need use multiunit resistance, and a plurality of triode and a plurality of electric capacity, high-pressure protect function cost in realizing high-low pressure and detecting is higher to the circuit is comparatively complicated, in case the problem is difficult to maintain and overhaul. Therefore, it is very important to solve the problem that the existing high-low voltage protection circuit for detecting the power voltage range has a complex structure and is difficult to maintain.
Disclosure of Invention
In order to solve the problems, the invention aims to provide a high-low voltage protection circuit for detecting a power supply voltage range, the detection of the input range of the power supply voltage is realized in a software AD sampling mode, the circuit is simple in design and low in cost, has platform transplanting conditions and different voltage range requirements, can be realized only by configuring software on line without reproducing hardware, has the characteristics of stability, reliability and strong anti-interference performance, and solves the problem that the high-low voltage protection circuit for detecting the power supply voltage range is complex in structure and is difficult to maintain at present.
The invention provides a high-low voltage protection circuit for detecting a power supply voltage range, which comprises an automobile storage battery power supply input end, an AD detection end, three resistors R1-R3, a diode D1 and an electrostatic impedor ESD1, wherein the resistor R1, the resistor R2 and the diode D1 are connected in series and then are arranged between the automobile storage battery power supply input end and the AD detection end, conduction points are arranged between the resistor R1 and the resistor R2, the number of the conduction points is two, one conduction point is connected in series with the ESD impedor ESD1 and then is grounded, and the other conduction point is connected in series with the resistor R3 and then is grounded.
The further improvement lies in that: the resistance value of the resistor R1 is 2.2K omega +/-1%, the resistance value of the resistor R2 is 200K omega +/-1%, and the resistance value of the resistor R3 is 22K omega +/-1%.
The further improvement lies in that: the AD detection end is connected to the vehicle-mounted MCU, and the AD detection is controlled through the vehicle-mounted MCU, so that the high-low voltage protection function is realized.
The further improvement lies in that: the protection voltage of the protection circuit is 9.2-16.5V, and the protection circuit can be protected when the protection voltage is higher or lower than the voltage.
The working principle of the circuit is as follows: when the voltage is higher than 16.5V and lower than 9.2V, a simple resistance voltage division circuit is used for obtaining (R1/R1+ R2) V IN (22K/22K +200K) 16.5V =1.635V, (22K/22K +200K) 9.2V = 1.911V) through resistance voltage division formula operation, when the voltage detected by the MCU chip AD is IN a range of 1.635V-0.911V, a normal working voltage is input, and when the voltage detected by the MCU chip AD is beyond a range of 1.635V-0.911V, high-low voltage protection control is started, so that a high-low voltage protection function is realized.
The invention has the beneficial effects that: the detection of the input range of the power supply voltage is realized by a software AD sampling mode, the circuit is simple in design and low in cost, has platform transplanting conditions and different voltage range requirements, does not need to produce hardware again, can be realized only by configuring software on line, has the characteristics of stability, reliability and strong anti-interference performance, is applied to circuits similar to high and low voltage detection, does not change the hardware parameters of the circuit, can realize the high and low voltage protection function only by simply configuring an on-line tool, and has the characteristics of stability, reliability and low cost.
Drawings
Fig. 1 is a circuit diagram of the present invention.
Detailed Description
For the purpose of enhancing understanding of the present invention, the present invention will be further described in detail with reference to the following examples, which are provided for illustration only and are not to be construed as limiting the scope of the present invention.
As shown in FIG. 1, this embodiment provides a power supply voltage range detects high-low voltage protection circuit, protection circuit includes car storage battery power supply input end, AD sense terminal, three resistance R1~ R3, a diode D1, an electrostatic impedance ware ESD1, set up between car storage battery power supply input end and AD sense terminal after resistance R1, resistance R2 and diode D1 establish ties, set up the conduction point between resistance R1 and the resistance R2, the quantity of conduction point is two, and ground connection behind one conduction point series electrostatic impedance ware ESD1, ground connection behind another conduction point series resistance R3. The resistance value of the resistor R1 is 2.2K omega +/-1%, the resistance value of the resistor R2 is 200K omega +/-1%, and the resistance value of the resistor R3 is 22K omega +/-1%. The AD detection end is connected to the vehicle-mounted MCU, and the AD detection is controlled through the vehicle-mounted MCU, so that the high-low voltage protection function is realized. The protection voltage of the protection circuit is 9.2-16.5V, and the protection circuit can be protected when the protection voltage is higher or lower than the voltage. The detection of the input range of the power supply voltage is realized by a software AD sampling mode, the circuit is simple in design and low in cost, has platform transplanting conditions and different voltage range requirements, does not need to produce hardware again, can be realized only by configuring software on line, has the characteristics of stability, reliability and strong anti-interference performance, is applied to circuits similar to high and low voltage detection, does not change the hardware parameters of the circuit, can realize the high and low voltage protection function only by simply configuring an on-line tool, and has the characteristics of stability, reliability and low cost.
Claims (4)
1. The utility model provides a mains voltage range detects high-low pressure protection circuit which characterized in that: protection circuit includes car storage battery power supply input, AD sense terminal, three resistance R1~ R3, a diode D1, an electrostatic impedance ware ESD1, set up between car storage battery power supply input and AD sense terminal after resistance R1, resistance R2 and diode D1 establish ties, set up the conduction point between resistance R1 and the resistance R2, the quantity of conduction point is two, and ground connection behind one conduction point series electrostatic impedance ware ESD1, ground connection behind another conduction point series resistance R3.
2. A supply voltage range detection high-low voltage protection circuit as claimed in claim 1, characterized in that: the resistance value of the resistor R1 is 2.2K omega +/-1%, the resistance value of the resistor R2 is 200K omega +/-1%, and the resistance value of the resistor R3 is 22K omega +/-1%.
3. A supply voltage range detection high-low voltage protection circuit as claimed in claim 1, characterized in that: the AD detection end is connected to the vehicle-mounted MCU, and the AD detection is controlled through the vehicle-mounted MCU, so that the high-low voltage protection function is realized.
4. A supply voltage range detection high-low voltage protection circuit as claimed in claim 1, characterized in that: the protection voltage of the protection circuit is 9.2-16.5V, and the protection circuit can be protected when the protection voltage is higher or lower than the voltage.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022794.0A CN110912105A (en) | 2019-10-25 | 2019-10-25 | High-low voltage protection circuit for power supply voltage range detection |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911022794.0A CN110912105A (en) | 2019-10-25 | 2019-10-25 | High-low voltage protection circuit for power supply voltage range detection |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110912105A true CN110912105A (en) | 2020-03-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911022794.0A Pending CN110912105A (en) | 2019-10-25 | 2019-10-25 | High-low voltage protection circuit for power supply voltage range detection |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555597A (en) * | 2020-03-31 | 2020-08-18 | 芜湖宏景电子股份有限公司 | Residual current discharge circuit of DDR chip power supply circuit |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203350420U (en) * | 2013-06-26 | 2013-12-18 | 天津成科自动化工程技术有限公司 | Battery voltage monitoring circuit for battery powered equipment |
| CN203645300U (en) * | 2013-10-16 | 2014-06-11 | 宏景电子(芜湖)有限公司 | High/low voltage protection circuit of on-board electronic product |
| CN207408568U (en) * | 2017-10-16 | 2018-05-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of car power supply voltage detection circuit of tape light |
| CN207623401U (en) * | 2017-10-19 | 2018-07-17 | 山东康威通信技术股份有限公司 | A kind of negative voltage AD sample circuits |
-
2019
- 2019-10-25 CN CN201911022794.0A patent/CN110912105A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203350420U (en) * | 2013-06-26 | 2013-12-18 | 天津成科自动化工程技术有限公司 | Battery voltage monitoring circuit for battery powered equipment |
| CN203645300U (en) * | 2013-10-16 | 2014-06-11 | 宏景电子(芜湖)有限公司 | High/low voltage protection circuit of on-board electronic product |
| CN207408568U (en) * | 2017-10-16 | 2018-05-25 | 惠州市德赛西威汽车电子股份有限公司 | A kind of car power supply voltage detection circuit of tape light |
| CN207623401U (en) * | 2017-10-19 | 2018-07-17 | 山东康威通信技术股份有限公司 | A kind of negative voltage AD sample circuits |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111555597A (en) * | 2020-03-31 | 2020-08-18 | 芜湖宏景电子股份有限公司 | Residual current discharge circuit of DDR chip power supply circuit |
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Application publication date: 20200324 |
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| RJ01 | Rejection of invention patent application after publication |