CN106501723B - It is a kind of for battery detection circuit external in three-phase kilowatt-hour meter - Google Patents

It is a kind of for battery detection circuit external in three-phase kilowatt-hour meter Download PDF

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Publication number
CN106501723B
CN106501723B CN201610851873.2A CN201610851873A CN106501723B CN 106501723 B CN106501723 B CN 106501723B CN 201610851873 A CN201610851873 A CN 201610851873A CN 106501723 B CN106501723 B CN 106501723B
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resistance
triode
battery
resistor
diode
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CN201610851873.2A
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CN106501723A (en
Inventor
王斌
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Ningbo Sanxing Medical and Electric Co Ltd
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Ningbo Sanxing Medical and Electric Co Ltd
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    • GPHYSICS
    • G01MEASURING; TESTING
    • G01RMEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
    • G01R31/382Arrangements for monitoring battery or accumulator variables, e.g. SoC

Abstract

The invention discloses a kind of for battery detection circuit external in three-phase kilowatt-hour meter, sends a signal to the first triode and the second triode by single-chip microcontroller, for controlling switching off and on for the two;External battery is detected when the first triode ON, detects internal battery when the second triode ON;The detection of resistance and the filtering of first capacitor are sent to the interruptive port of single-chip microcontroller to signal after testing after conducting;It only needs an interruptive port just to complete the detection of interior external battery in this way, will not reduce power consumption in starting internal temperature sensor, increase battery.

Description

It is a kind of for battery detection circuit external in three-phase kilowatt-hour meter
Technical field
The present invention relates to battery detecting fields, and in particular to a kind of for battery detection circuit external in three-phase kilowatt-hour meter.
Background technique
Three-phase kilowatt-hour meter is the instrument for measuring electric energy, and at home and abroad there are application in many countries;It needs included Battery drives, but in overseas country because national conditions difference, some regulations need external battery, built in some regulation needs Battery, the also built-in external battery of some regulations will have, regardless of external battery or internal battery, require to battery Voltage is detected.
In three-phase kilowatt-hour meter of today because the reason of transformer and cost, using the MCU of intermediate frequency, such as G80F935, But this kind of MCU only has two interruptive ports, one of them must be multiplexed with internal temperature sensor power interface, such Words will open temperature sensor connected to it using existing battery detection circuit when giving battery detecting signal, work as temperature When spending sensor unlatching, it will lead to the consumption of cell voltage, increase the power consumption of battery, reduce the service life of battery, and Some requirements of country for battery power consumption are not achieved, cannot be introduced into the national market.
Summary of the invention
The purpose of the invention is to provide a kind of only to connect an interruptive port and can detect built-in external electricity simultaneously The interior external battery detection circuit for three-phase kilowatt-hour meter in pond.
The invention is realized by the following technical scheme: it is a kind of for battery detection circuit external in three-phase kilowatt-hour meter, including First resistor, second resistance, 3rd resistor, the 4th resistance, the 5th resistance, the 6th resistance, the 7th resistance, the 8th resistance, first Capacitor, first diode, the second diode, the first triode and the second triode, one end of the first resistor is for connecting External battery, one end of the 4th resistance is for internal battery of connecting;The other end of the first resistor connects the one or two pole The anode of pipe, the other end of the 4th resistance connect the anode of the second triode, the cathode of the first diode and second The cathode of triode is connected with each other and is connected with power supply;The anode of the first diode is additionally coupled to the transmitting of the first triode Pole, is parallel with second resistance between the emitter and base stage of first triode, the base stage of first triode is also connected with One end of 3rd resistor;The anode of second diode is additionally coupled to the collector of the second triode, second triode Emitter and base stage between be parallel with the 6th resistance, the base stage of second triode is also connected with one end of the 5th resistance, institute The other end for stating 3rd resistor and the 5th resistance is connected with each other and is additionally coupled to the I/O mouth of single-chip microcontroller;First triode The emitter of collector and the second triode is connected with each other and is connected to one end of the 7th resistance, the other end of the 7th resistance Be connected to one end of the 8th resistance, one end of the 8th resistance is also connected with one end of middle first capacitor, the 8th resistance and The other end of first capacitor is all grounded;One end of the first capacitor is additionally coupled to the interruptive port of single-chip microcontroller;Described 1st Pole pipe is PNP type triode, and second triode is NPN type triode;The first resistor and the 4th resistance are all current limliting Resistance;7th resistance and the 8th resistance are detection resistance.
The present invention sends a signal to the first triode and the second triode by single-chip microcontroller, shutdown for both controlling and Conducting;External battery is detected when the first triode ON, detects internal battery when the second triode ON;Signal after conducting The detection of resistance and the filtering of first capacitor are sent to the interruptive port of single-chip microcontroller after testing;An interruptive port is only needed in this way The detection of interior external battery is just completed, power consumption will not be reduced in starting internal temperature sensor, increase battery.
The invention has the beneficial effects that: 1) it only needs an interruptive port just complete the detection of interior external battery, reduces Power consumption increases battery;2) first diode and the second diode are for controlling interior external battery power supply priority.
Detailed description of the invention
Fig. 1 is circuit diagram of the invention.
Fig. 2 is the circuit diagram of the prior art.
Specific embodiment
With reference to the accompanying drawing with specific embodiment, the invention will be further described.
See Fig. 1 to Fig. 2, it is a kind of for battery detection circuit external in three-phase kilowatt-hour meter, including first resistor R1, the second electricity Hinder R2,3rd resistor R3, the 4th resistance R4, the 5th resistance R5, the 6th resistance R6, the 7th resistance R7, the 8th resistance R8, the first electricity Hold C1, first diode VD1, the second diode VD2, the first triode V1 and the second triode V2, the first resistor R1's One end is for the external battery GB1 that connects, and one end of the 4th resistance R4 is for the internal battery GB2 that connects;The first resistor The anode of the other end connection first diode VD1 of R1, the other end of the 4th resistance R4 are connecting the second triode VD2 just The cathode of pole, the cathode of the first diode VD1 and the second triode VD2 are connected with each other and are connected with VDD power supply;Described The anode of one diode VD1 is additionally coupled to the emitter of the first triode V1, the emitter and base stage of the first triode V1 Between be parallel with second resistance R2, the base stage of the first triode V1 is also connected with one end of 3rd resistor R3;Described 2nd 2 The anode of pole pipe VD2 is additionally coupled to the collector of the second triode V2, between the emitter and base stage of the second triode V2 It is parallel with the 6th resistance R6, the base stage of the second triode V2 is also connected with one end of the 5th resistance R5, the 3rd resistor R3 It is connected with each other with the other end of the 5th resistance R5 and is additionally coupled to the I/O mouth BAT-control of single-chip microcontroller;First triode The emitter of the collector of V1 and the second triode V2 are connected with each other and are connected to one end of the 7th resistance R7, the 7th resistance The other end of R7 is connected to one end of the 8th resistance R8, and one end of the 8th resistance R8 is also connected with the one of middle first capacitor C1 End, the other end of the 8th resistance R8 and first capacitor C1 are all grounded;One end of the first capacitor C1 is additionally coupled to monolithic The interruptive port IN-BAT of machine;The first triode V1 is PNP type triode, and the second triode V2 is three pole of NPN type Pipe;The first resistor R1 and the 4th resistance R4 is current-limiting resistance;The 7th resistance R7 and the 8th resistance R8 is detection electricity Resistance.
In present embodiment, the VDD power supply is 3V3 power supply;The anode connection first resistor R1 of the external battery GB1 One end, external battery GB1 cathode ground connection;One end of the 4th resistance R4 of anode connection of the internal battery GB2, in-built electrical The cathode of pond GB2 is grounded.
In present embodiment, when needing to detect external battery GB1, single-chip microcontroller is just sent by I/O mouthfuls of BAT-control Low level signal 0 leads to the first triode V1 saturation conduction to the first triode V1 connected to it and the second triode V2, and Two triode V2 shutdown, external battery GB1 can enter the 7th of most detection resistance by the first triode V1 of conducting Resistance R7 and the 8th resistance R8 carries out detection sampling, then the interruptive port of single-chip microcontroller is sent to after filtering by first capacitor C1 IN-BAT completes the detection of external battery GB1.
In present embodiment, when needing to detect internal battery GB2, single-chip microcontroller is just sent by I/O mouthfuls of BAT-control High level signal 1 leads to the second triode V2 saturation conduction to the first triode V1 connected to it and the second triode V2, and One triode V1 shutdown, internal battery GB2 can enter the 7th of most detection resistance by the second triode V2 of conducting Resistance R7 and the 8th resistance R8 carries out detection sampling, then the interruptive port of single-chip microcontroller is sent to after filtering by first capacitor C1 IN-BAT completes the detection of internal battery GB2.
In present embodiment, power supply could be connected under the first triode V1 on state in the first diode VD1, and And prevent directional current;Power supply could be connected under the second triode V2 on state in the second triode V2, and also prevents Only directional current.
In present embodiment, the first resistor R1 is used to limit the size of current of external battery GB1, to prevent electric current mistake Component is burnt out greatly, while can also play the role of partial pressure;The electric current that the 4th resistance R4 is used to limit internal battery GB2 is big It is small, to prevent electric current is excessive from burning out component, while it can also play the role of partial pressure.
Protection scope of the present invention includes but is not limited to embodiment of above, and protection scope of the present invention is with claims Subject to, replacement, deformation, the improvement that those skilled in the art that any pair of this technology is made is readily apparent that each fall within of the invention Protection scope.

Claims (4)

1. a kind of for battery detection circuit external in three-phase kilowatt-hour meter, it is characterised in that: including first resistor (R1), the second electricity Hinder (R2), 3rd resistor (R3), the 4th resistance (R4), the 5th resistance (R5), the 6th resistance (R6), the 7th resistance (R7), the 8th Resistance (R8), first capacitor (C1), first diode (VD1), the second diode (VD2), the first triode (V1) and the two or three Pole pipe (V2), for connecting external battery (GB1), one end of the 4th resistance (R4) is used for one end of the first resistor (R1) In series connection internal battery (GB2);The anode of other end connection first diode (VD1) of the first resistor (R1), described the The anode of the other end connection the second diode (VD2) of four resistance (R4), the cathode and the two or two of the first diode (VD1) The cathode of pole pipe (VD2) is connected with each other and is connected with VDD power supply;The anode of the first diode (VD1) is additionally coupled to first The emitter of triode (V1) is parallel with second resistance (R2), institute between the emitter and base stage of first triode (V1) The base stage for stating the first triode (V1) is also connected with one end of 3rd resistor (R3);The anode of second diode (VD2) also connects It is connected to the collector of the second triode (V2), is parallel with the 6th resistance between the emitter and base stage of second triode (V2) (R6), the base stage of second triode (V2) is also connected with one end of the 5th resistance (R5), the 3rd resistor (R3) and the 5th The other end of resistance (R5) is connected with each other and is additionally coupled to the I/O mouth (BAT-control) of single-chip microcontroller;First triode (V1) emitter of collector and the second triode (V2) is connected with each other and is connected to one end of the 7th resistance (R7), and described The other end of seven resistance (R7) is connected to one end of the 8th resistance (R8), one end of the 8th resistance (R8) be also connected in first The other end of one end of capacitor (C1), the 8th resistance (R8) and first capacitor (C1) is all grounded;The first capacitor (C1) One end be additionally coupled to the interruptive port (IN-BAT) of single-chip microcontroller.
2. according to claim 1 a kind of for battery detection circuit external in three-phase kilowatt-hour meter, it is characterised in that: described First triode (V1) is PNP type triode, and second triode (V2) is NPN type triode.
3. according to claim 1 a kind of for battery detection circuit external in three-phase kilowatt-hour meter, it is characterised in that: described First resistor (R1) and the 4th resistance (R4) are all current-limiting resistance.
4. according to claim 1 a kind of for battery detection circuit external in three-phase kilowatt-hour meter, it is characterised in that: described 7th resistance (R7) and the 8th resistance (R8) are detection resistance.
CN201610851873.2A 2016-09-27 2016-09-27 It is a kind of for battery detection circuit external in three-phase kilowatt-hour meter Active CN106501723B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101275975A (en) * 2008-04-18 2008-10-01 上海闻泰电子科技有限公司 Mobile phone cell low-voltage testing circuit
CN101399449A (en) * 2007-09-29 2009-04-01 联想(北京)有限公司 Power supply device applied to portable devices
CN202421472U (en) * 2011-12-31 2012-09-05 石家庄国耀电子科技有限公司 On-line detection circuit of uninterrupted power backup battery
CN105676145A (en) * 2016-04-01 2016-06-15 福建联迪商用设备有限公司 Method and device for detecting temperature and ID of battery
CN205489708U (en) * 2016-04-01 2016-08-17 佛山市顺德区携创电机制造有限公司 Power supply circuit with input source recognition function

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101399449A (en) * 2007-09-29 2009-04-01 联想(北京)有限公司 Power supply device applied to portable devices
CN101275975A (en) * 2008-04-18 2008-10-01 上海闻泰电子科技有限公司 Mobile phone cell low-voltage testing circuit
CN202421472U (en) * 2011-12-31 2012-09-05 石家庄国耀电子科技有限公司 On-line detection circuit of uninterrupted power backup battery
CN105676145A (en) * 2016-04-01 2016-06-15 福建联迪商用设备有限公司 Method and device for detecting temperature and ID of battery
CN205489708U (en) * 2016-04-01 2016-08-17 佛山市顺德区携创电机制造有限公司 Power supply circuit with input source recognition function

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