CN203178341U - Voltage collection system - Google Patents
Voltage collection system Download PDFInfo
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- CN203178341U CN203178341U CN 201320104856 CN201320104856U CN203178341U CN 203178341 U CN203178341 U CN 203178341U CN 201320104856 CN201320104856 CN 201320104856 CN 201320104856 U CN201320104856 U CN 201320104856U CN 203178341 U CN203178341 U CN 203178341U
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Abstract
The utility model discloses a voltage collection system used for performing voltage collection on each single battery in a battery pack formed by a plurality of single batteries in series connection or on the battery pack. The system comprises a micro-control unit and a single battery voltage collection circuit and a single battery voltage difference amplification circuit which are electrically connected to the micro-control unit and are in electric connection. The beneficial effects are that the voltage collection system can realize accurate transmission of single battery voltage, guarantee collection accuracy of battery voltage, realize isolation between battery pack high voltage and micro-control unit high voltage, save voltage collection resource and reduce collection cost.
Description
Technical field
The utility model relates to the battery management system field, more particularly, relates to a kind of voltage acquisition system.
Background technology
Because the restriction of accumulator inherent characteristic and prior art, the output voltage of single-unit accumulator is generally all lower, and there is small property difference in each accumulator, and the supply voltage that different batteries provides is often consistent inadequately, and the voltage stability of each accumulator is also lower.In application process, in order to obtain more high-power and stable supply voltage, battery need be formed electric battery with series system.And can operate as normal in order to ensure electric battery, need carry out unified monitoring to electric battery in real time, effectively battery is protected.In above-mentioned unified monitoring process, not only to monitor total output voltage of electric battery, also need each monomer battery voltage in the electric battery is monitored.At present, for total output voltage of electric battery with wherein popularize comparatively advanced technology as yet aspect the monitoring of the output voltage of each cell, traditional voltage acquisition mode generally has chip or the more high shortcoming of circuit cost that the voltage acquisition precision is low, be used for gathering voltage.
The utility model content
The technical problems to be solved in the utility model is, defectives such as the acquisition precision that exists in the above-mentioned monomer battery voltage collection at prior art is low, Acquisition Circuit cost height, a kind of voltage acquisition system is provided, be used for each cell of the electric battery be made up of the cell of a plurality of series connection is carried out voltage acquisition, or electric battery is carried out voltage acquisition.
The technical scheme that its technical matters that solves the utility model adopts is:
A kind of voltage acquisition system, be used for each cell or this electric battery of the electric battery be made up of the cell of a plurality of series connection are carried out voltage acquisition, described system comprises: micro-control unit, monomer battery voltage Acquisition Circuit and monomer battery voltage differential amplifier circuit with the micro-control unit electric connection, and monomer battery voltage Acquisition Circuit and monomer battery voltage differential amplifier circuit electrically connect, wherein
The monomer battery voltage Acquisition Circuit is used for gathering monomer battery voltage and being sent to the monomer battery voltage differential amplifier circuit;
The monomer battery voltage differential amplifier circuit is used for the voltage of monomer battery voltage Acquisition Circuit collection is carried out the difference amplification and is sent to micro-control unit;
Micro-control unit, carry out voltage acquisition and control the difference amplification that the monomer battery voltage differential amplifier circuit carries out voltage with control monomer battery voltage Acquisition Circuit for generation of control signal, and be used for receiving the voltage signal that the monomer battery voltage differential amplifier circuit transmits, this voltage signal is handled the back obtain magnitude of voltage;
Described monomer battery voltage Acquisition Circuit comprises a plurality of monomer battery voltages collection optocouplers, is used for the voltage of cell is isolated collection;
Wherein, be connected with a described monomer battery voltage between per two adjacent described cells and gather optocoupler, and the negative pole of the positive pole of first cell in the described series connection cell and last cell also is connected respectively to a described monomer battery voltage collection optocoupler;
Described monomer battery voltage is gathered optocoupler and is also connected to monomer battery voltage differential amplifier circuit and micro-control unit.
It is linear optical coupling that described monomer battery voltage is gathered optocoupler.
Described monomer battery voltage differential amplifier circuit comprises first differential amplifier circuit and second differential amplifier circuit,
Wherein, first differential amplifier circuit, second differential amplifier circuit all link to each other with micro-control unit with the monomer battery voltage Acquisition Circuit.
Described first differential amplifier circuit comprises first differential amplifier, the first isolation optocoupler;
Described second differential amplifier circuit comprises first differential amplifier, second differential amplifier, the second isolation optocoupler;
The described first isolation optocoupler and second is isolated optocoupler and is linear optical coupling;
Wherein, the output termination first of first differential amplifier in first differential amplifier circuit is isolated the output terminal collector of optocoupler, and first output terminal emitter and the micro-control unit of isolating optocoupler electrically connects, negative electrode and the micro-control unit of input end diode electrically connect;
The inverting input of output termination second differential amplifier of first differential amplifier in second differential amplifier circuit, the in-phase input end ground connection of second differential amplifier, output termination second are isolated the output terminal collector of optocoupler, and second output terminal emitter and the micro-control unit that isolates optocoupler electrically connects, negative electrode and the micro-control unit of input end diode electrically connect.
Two monomer battery voltages that are connected to the cell two ends are gathered a monomer battery voltage in the optocouplers and are gathered the in-phase input end that the output terminal emitter of optocoupler is connected to first differential amplifier, and the output terminal emitter that another monomer battery voltage is gathered optocoupler connects the inverting input of then receiving first differential amplifier; Two monomer battery voltages that are connected to the cell two ends are gathered a monomer battery voltage in the optocouplers and are gathered the inverting input that the output terminal emitter of optocoupler is connected to first differential amplifier, and the output terminal emitter that another monomer battery voltage is gathered optocoupler then is connected to the in-phase input end of first differential amplifier.
And the output terminal emitter of the monomer battery voltage that is connected with the positive pole of first cell collection optocoupler is connected to the in-phase input end of first differential amplifier;
Described voltage acquisition system also comprises working power, and described monomer battery voltage gathers that optocoupler, first is isolated optocoupler, second anode of isolating the input end diode of optocoupler all connects described power supply.
The negative electrode that described monomer battery voltage is gathered the input end diode of optocoupler all electrically connects with micro-control unit.
Described voltage acquisition system also comprises battery voltage Acquisition Circuit and battery voltage differential amplifier circuit, wherein,
The battery voltage Acquisition Circuit electrically connects with micro-control unit and battery voltage differential amplifier circuit, is used for according to the control signal of micro-control unit the total voltage of electric battery series connection cell being gathered;
The battery voltage differential amplifier circuit electrically connects with micro-control unit and battery cell Acquisition Circuit, is used for the voltage of battery voltage Acquisition Circuit collection is carried out being sent to micro-control unit after difference is amplified.
Described battery voltage Acquisition Circuit comprises battery voltage collection optocoupler, first resistance; Described battery voltage differential amplifier circuit comprises the 3rd differential amplifier, the 3rd isolation optocoupler; Described battery voltage gathers optocoupler and the 3rd isolation optocoupler is linear optical coupling;
Wherein, the battery voltage output terminal collector of the gathering optocoupler positive pole, the output terminal emitter that connect electric battery connects the negative pole of electric battery, negative electrode and the micro-control unit electric connection of input end diode by first resistance;
Series connection node between first resistance and the electric battery negative pole connects the inverting input of the 3rd differential amplifier;
Series connection node between first resistance and the battery voltage collection optocoupler output terminal emitter connects the in-phase input end of the 3rd differential amplifier;
The output termination the 3rd of the 3rd differential amplifier is isolated the output terminal collector of optocoupler, and negative electrode and the micro-control unit of the output terminal emitter of the 3rd optical coupled switch and micro-control unit electric connection, input end diode electrically connect.
Described battery voltage is gathered optocoupler, the 3rd anode of isolating the input end diode of optocoupler all connects working power.
Implement cell voltage acquisition system of the present utility model, have following beneficial effect:
(1), realize the accurate transmission of monomer battery voltage, guaranteed the collection degree of accuracy of cell voltage;
(2), unlatching optocoupler capable of circulation to be carrying out voltage acquisition to cell, realize the high pressure isolation of electric battery high pressure and micro-control unit, and can save the voltage acquisition resource;
(3), utilizing optocoupler to replace traditional semi-conductor chip gathers cell voltage, has effectively reduced acquisition cost.
Description of drawings
The utility model is described in further detail below in conjunction with drawings and Examples, in the accompanying drawing:
Fig. 1 is the voltage acquisition system construction drawing of the utility model one embodiment;
Fig. 2 is monomer battery voltage Acquisition Circuit in the voltage acquisition system shown in Figure 1 and the circuit diagram of battery voltage Acquisition Circuit;
Fig. 3 is the circuit diagram of the monomer battery voltage differential amplifier circuit of voltage acquisition system shown in Figure 1;
Fig. 4 is the circuit diagram of the battery voltage differential amplifier circuit of voltage acquisition system shown in Figure 1.
Embodiment
Understand for technical characterictic of the present utility model, purpose and effect being had more clearly, now contrast accompanying drawing and describe embodiment of the present utility model in detail.
As shown in Figure 1, the electric battery in an embodiment of the present utility model comprises the cell of a plurality of series connection.Described system comprises: micro-control unit 100, monomer battery voltage Acquisition Circuit 300, battery voltage Acquisition Circuit 400, monomer battery voltage differential amplifier circuit 200, battery voltage differential amplifier circuit 500.
Wherein, monomer battery voltage Acquisition Circuit 300 electrically connects with micro-control unit 100 and monomer battery voltage differential amplifier circuit 200, is used for gathering monomer battery voltage and being sent to differential amplifier circuit.
Battery voltage Acquisition Circuit 400 electrically connects with micro-control unit 100 and battery voltage differential amplifier circuit 500, is used for according to the control signal of micro-control unit 100 total voltage of electric battery series connection cell being gathered.
Monomer battery voltage differential amplifier circuit 200 electrically connects with micro-control unit 100 and monomer battery voltage Acquisition Circuit 300, is used for the voltage that monomer battery voltage Acquisition Circuit 300 is gathered is carried out the difference amplification and is sent to micro-control unit 100.
Battery voltage differential amplifier circuit 500 electrically connects with micro-control unit 100 and battery cell Acquisition Circuit 400, is used for the voltage that battery voltage Acquisition Circuit 400 is gathered is carried out being sent to micro-control unit 100 after difference is amplified.
Micro-control unit 100, carry out the difference amplification that voltage acquisition and control monomer battery voltage differential amplifier circuit 200 and battery cell differential amplifier circuit 500 carry out voltage for generation of control signal with control monomer battery voltage Acquisition Circuit 300 and battery voltage Acquisition Circuit 400, and be used for receiving the voltage signal that these two differential amplifier circuits transmit, this voltage signal is handled the magnitude of voltage that the back obtains.
The voltage acquisition system of the utility model embodiment also comprises working power, in the utility model embodiment this working power comprise+the 5V power supply and-the 5V power supply ,+5V power supply and-all be connected to filter capacitor between 5V power supply and the ground.
As shown in Figure 2, the monomer battery voltage Acquisition Circuit 300 in the voltage acquisition system of the utility model one embodiment comprises a plurality of monomer battery voltages collection optocoupler U1-Un, is used for the voltage of cell is isolated collection.It is linear optical coupling that monomer battery voltage among the utility model embodiment is gathered optocoupler, each monomer battery voltage is gathered optocoupler and is had four pins, and it corresponds to the anode of output terminal collector, output terminal emitter, input end diode, the negative electrode of input end diode respectively.Be connected with a monomer battery voltage between per two adjacent described cells and gather optocoupler, and the negative pole of the positive pole of first cell in the described series connection cell and last cell also is connected respectively to monomer battery voltage collection optocoupler.So the number of the monomer battery voltage collection optocoupler in the battery voltage acquisition system should be Duoed one than the number of series connection cell, the quantity of the cell of even connecting is N, and then the quantity of monomer battery voltage collection optocoupler is N+1.Monomer battery voltage is gathered optocoupler: be connected the output terminal collector that a monomer battery voltage is gathered optocoupler between per two adjacent described cells respectively, and the anode of the input end diode of monomer battery voltage collection optocoupler all connects+and the negative electrode of 5V power supply, input end diode all connects micro-control unit 100.The connected mode that monomer battery voltage is gathered the output terminal emitter of optocoupler will be explained hereinafter.
Be illustrated in figure 3 as the circuit diagram of the monomer battery voltage differential amplifier circuit 200 in the utility model voltage acquisition system.This monomer battery voltage differential amplifier circuit 200 comprises first differential amplifier circuit 201 and second differential amplifier circuit 202, wherein, first differential amplifier circuit 201, second differential amplifier circuit 202 all link to each other with micro-control unit 100 with monomer battery voltage Acquisition Circuit 300.
First differential amplifier circuit 201 comprises that the first differential amplifier PU1, first isolates optocoupler U01,
Second differential amplifier circuit 202 comprises that the first differential amplifier PU1, the second differential amplifier PU2, second isolate optocoupler U02, and the described first isolation optocoupler U01 and second isolates optocoupler U02 and is linear optical coupling.
As shown in Figures 2 and 3, gather the in-phase input end that the output terminal emitter of a monomer battery voltage collection optocoupler in the optocoupler is connected to the first differential amplifier PU1 if be connected to two monomer battery voltages at cell two ends, then the output terminal emitter of another monomer battery voltage collection optocoupler is connected to the inverting input of the first differential amplifier PU1; Gather the inverting input that the output terminal emitter of a monomer battery voltage collection optocoupler in the optocoupler is connected to the first differential amplifier PU1 if be connected to two monomer battery voltages at cell two ends, then the output terminal emitter of another monomer battery voltage collection optocoupler is connected to the in-phase input end of the first differential amplifier PU1; And the output terminal emitter of the monomer battery voltage that is connected with the positive pole of first cell collection optocoupler is connected to the in-phase input end of the first differential amplifier PU1.Adopt such connected mode, the resource that can save differential amplifier circuit.
As shown in Figure 3, the output termination first of the first differential amplifier PU1 in first differential amplifier circuit 201 is isolated the output terminal collector of optocoupler U01, and the anode that the first output terminal emitter of isolating optocoupler U01 and micro-control unit 100 electrically connect with the negative electrode that sampled voltage is outputed to micro-control unit 100, input end diode and micro-control unit 100 electric connections, input end diode connects+the 5V power supply by resistance R 16.
The model of the first differential amplifier PU1 that selects for use in an embodiment of the present utility model is OP07, as shown in Figure 3, the tripod of the first differential amplifier PU1 is in-phase input end, crus secunda is inverting input, the 4th pin is negative power end, the 6th pin is output terminal, and the 7th pin is positive power source terminal, and first pin and octal are the zeroing pin.Wherein, the 7th pin connect+5V power supply, first pin by resistance R 7 connect+5V power supply, octal by the 8th resistance connect+5V power supply, the 4th pin connect-5V power supply and to connect crus secunda by capacitor C 1 ground connection, the 6th pin resistance R 5 that is output terminal by series connection and resistance R 6 be to be connected to capacitor C 3 between inverting input, crus secunda and tripod.
Be connected to capacitor C 4, output terminal emitter between the first isolation optocoupler U01 output terminal collector and output terminal emitter by resistance R 9 ground connection.
As shown in Figure 3, the output terminal of the first differential amplifier PU1 connects the inverting input of the second differential amplifier PU2 in second differential amplifier circuit 202 by resistance R 10, the output terminal collector that the in-phase input end of the second differential amplifier PU2 is isolated optocoupler U02 by parallel resistor R11 and resistance R 12 ground connection, output termination second, second output terminal emitter and the micro-control unit 100 that isolates optocoupler U02 electrically connects, negative electrode and the micro-control unit 100 of input end diode electrically connect, the anode of input end diode connects+the 5V power supply by resistance R 15.
The model of the second differential amplifier PU2 that selects for use in an embodiment of the present utility model is 1458, and its positive power source terminal connects inverting input by capacitor C 6 ground connection, negative supply termination-5V power supply and by capacitor C 5 ground connection, output terminal by resistance R 13.
Second output terminal emitter and the output terminal inter-collector of isolating optocoupler U02 is connected to capacitor C 7, output terminal emitter pin by resistance R 14 ground connection.
As shown in Figure 2, the battery voltage Acquisition Circuit 400 among the utility model one embodiment comprises battery voltage collection optocoupler U0, first resistance R 1, and it is linear optical coupling that this battery voltage is gathered optocoupler U0.
Be illustrated in figure 4 as the circuit diagram of the battery voltage differential amplifier circuit 500 of the utility model one embodiment, battery voltage differential amplifier circuit 500 comprises that the 3rd differential amplifier PU3, the 3rd isolates optocoupler U03, and the 3rd isolation optocoupler U03 is linear optical coupling.
By Fig. 2 and Fig. 4 as can be known, the battery voltage output terminal collector of the gathering optocoupler U0 positive pole, the output terminal emitter that connect electric battery connects the negative pole of electric battery, negative electrode and micro-control unit 100 electric connections of input end diode by first resistance R 1; The in-phase input end of the 3rd differential amplifier PU3 connects the series connection node between first resistance R 1 and the battery voltage collection optocoupler U0 output terminal emitter, the output terminal collector that output termination the 3rd is isolated optocoupler U03 by series connection node, the inverting input that resistance R 23 connects between first resistance R 1 and the electric battery negative pole by resistance R 24, and negative electrode and the micro-control unit 100 of the output terminal emitter of the 3rd optical coupled switch U03 and micro-control unit 100 electric connections, input end diode electrically connect.
The model of the 3rd differential amplifier PU3 that selects for use in an embodiment of the present utility model is OP07, and the structure of its pin is identical with the first differential amplifier PU1.The in-phase input end of the 3rd differential amplifier PU3 also is connected to capacitor C 13, output terminal resistance R 25 and the resistance R 26 by series connection and connects inverting input, positive supply termination+5V power supply, negative supply termination-5V power supply and connect 5V power supply, octal by capacitor C 11 ground connection, first pin by resistance R 27 and connect+5V power supply and connect+the 5V power supply by capacitor C 12 by resistance R 28 between the resistance R 22 by series connection and resistance R 21 ground connection, in-phase input end and the inverting input.
The 3rd output terminal emitter and the output terminal inter-collector of isolating optocoupler U03 is connected to capacitor C 14, output terminal emitter by resistance R 29 ground connection.
Among the utility model one embodiment first isolates optocoupler U01, second and isolates acting as of optocoupler U02, the 3rd isolation optocoupler U03: monomer battery voltage Acquisition Circuit 300 and battery voltage Acquisition Circuit 400 are carried out electrical isolation with micro-control unit 100, prevent from burning out the parts in the micro-control unit 100.
In an embodiment of the present utility model, above-mentioned all optocouplers be monomer battery voltage gather optocoupler, battery voltage gather optocoupler, first isolate optocoupler, second isolate optocoupler, the 3rd anode of isolating the input end diode of optocoupler all connect+negative electrode and the micro-control unit 100 of 5V power supply, input end diode join.The output signal that micro-control unit 100 can adopt the control demultiplexer is for the unlatching of optocoupler or close control signal is provided.This control signal is gathered optocoupler, battery voltage by monomer battery voltage and is gathered optocoupler, first and isolate optocoupler, second and isolate the switching function of these optocouplers of cathodic control that optocoupler, the 3rd is isolated the input end diode of optocoupler.Be that V1-Vn, V0, V01, V02, V03 among Fig. 2, Fig. 3, Fig. 4 is the control voltage from micro-control unit 100.The demultiplexer of output such as demultiplexer adoptable 8 tunnel, 4 tunnel.
The principle of work of cell voltage acquisition system of the present utility model is:
When gathering the voltage of first segment cell, utilize micro-control unit 100 output control signals, U1, the U2 and first that make monomer battery voltage gather in the optocoupler isolate optocoupler U01 unlatching; The voltage at first segment cell two ends amplifies by the first differential amplifier PU1 difference by U1 and U2; The voltage of the first segment cell after difference is amplified outputs to micro-control unit 100, obtains the voltage of first cell through the processing of micro-control unit 100.After having gathered the voltage of first segment cell, gather the voltage of the second joint cell, micro-control unit 100 control optocoupler U1, U01 close, and control optocoupler U3, U02 open, this moment, the voltage at the second joint cell two ends amplified the magnitude of voltage that obtains bearing later by the first differential amplifier PU1 difference, the magnitude of voltage that should bear is sent to the second differential amplifier PU2 to carry out oppositely, then the voltage after reverse is isolated optocoupler U02 by second of unlatching and outputs to micro-control unit 100.Acquisition mode when gathering the 3rd joint cell, the 5th ordinal numbers such as joint cell etc. and be the monomer battery voltage of odd number is identical with first segment monomer battery voltage acquisition mode.Acquisition mode when gathering the 4th joint cell, the 6th ordinal numbers such as joint cell etc. and be the monomer battery voltage of even number is identical with the second joint monomer battery voltage acquisition mode.
When collection has the assembled battery total voltage that the cell of N joint series connection forms, open optocoupler U0 and the 3rd by the micro-control unit and isolate optocoupler U03, assembled battery total voltage is sent to the 3rd differential amplifier PU3 to carry out again signal being isolated optocoupler U03 by the 3rd and being sent to micro-control unit 100 after difference amplifies.
Monomer battery voltage Acquisition Circuit 300 in the cell voltage acquisition system of the present utility model and battery voltage Acquisition Circuit 400 utilize the switching function of optocoupler to realize the collection of cell voltage, utilize optocoupler to realize the high pressure isolation of electric battery high pressure and micro-control unit 100 simultaneously.In gathering electric battery arbitrarily during cell, only need to open at two collection optocouplers at cell two ends by micro-control unit 100 control linkages, just can and give differential amplifier circuit 200 with the monomer battery voltage collection, by sending micro-control unit 100 to after the amplification of differential amplifier circuit 200 difference, Fig. 3 is with micro-control unit 100 with Vout1, Vout2, Vout3 among Fig. 4 and links to each other, and the monomer battery voltage that voltage acquisition of the present utility model system is obtained or battery voltage signal send to and be control module 100.Micro-control unit 100 is handled back control display device etc. to these voltage signals the battery cell voltage that collects is shown then.
Cell voltage acquisition system of the present utility model can be applicable to as in all extensive electric battery such as electric automobile, energy-accumulating power station.This system is by the sampling to battery cell voltage, thus the health control of realization electric battery.Adopt voltage acquisition of the present utility model system, under the occasion that need manage electric battery, utilize the circulation of optocoupler to open and constantly carry out the scanning of monomer battery voltage, thereby realize the accurate sampling of whole Battery pack monomer voltage.And can realize providing support accurate test to the electric battery internal resistance for setting up batteries management system by the accurate sampling to battery cell voltage, thereby realize improving the purpose in the serviceable life of electric battery.
By reference to the accompanying drawings embodiment of the present utility model is described above; but the utility model is not limited to above-mentioned embodiment; above-mentioned embodiment only is schematic; rather than it is restrictive; those of ordinary skill in the art is under enlightenment of the present utility model; not breaking away under the scope situation that the utility model aim and claim protect, also can make a lot of forms, these all belong within the protection of the present utility model.
Claims (10)
1. voltage acquisition system, be used for each cell or this electric battery of the electric battery be made up of the cell of a plurality of series connection are carried out voltage acquisition, it is characterized in that, described system comprises: micro-control unit, (100), with micro-control unit, (100) the monomer battery voltage Acquisition Circuit of Dian Xinglianjieing, (300) and the monomer battery voltage differential amplifier circuit, (200), and monomer battery voltage Acquisition Circuit, (300) and the monomer battery voltage differential amplifier circuit, (200) electrically connect, wherein
Monomer battery voltage Acquisition Circuit (300) is used for gathering monomer battery voltage and being sent to monomer battery voltage differential amplifier circuit (200);
Monomer battery voltage differential amplifier circuit (200) is used for the voltage that monomer battery voltage Acquisition Circuit (300) is gathered is carried out the difference amplification and is sent to micro-control unit (100);
Micro-control unit (100), carry out voltage acquisition with control monomer battery voltage Acquisition Circuit (300) and control the difference amplification that monomer battery voltage differential amplifier circuit (200) carries out voltage for generation of control signal, and be used for receiving the voltage signal that monomer battery voltage differential amplifier circuit (200) transmits, this voltage signal is handled the back obtain magnitude of voltage;
Described monomer battery voltage Acquisition Circuit (300) comprises a plurality of monomer battery voltages collection optocouplers, is used for the voltage of cell is isolated collection;
Wherein, be connected with a described monomer battery voltage between per two adjacent described cells and gather optocoupler, and the negative pole of the positive pole of first cell in the described series connection cell and last cell also is connected respectively to a described monomer battery voltage collection optocoupler;
Described monomer battery voltage is gathered optocoupler and is also connected to monomer battery voltage differential amplifier circuit (200) and micro-control unit (100).
2. voltage acquisition according to claim 1 system is characterized in that, it is linear optical coupling that described monomer battery voltage is gathered optocoupler.
3. voltage acquisition according to claim 2 system is characterized in that described monomer battery voltage differential amplifier circuit (200) comprises first differential amplifier circuit (201) and second differential amplifier circuit (202),
Wherein, first differential amplifier circuit (201), second differential amplifier circuit (202) all link to each other with micro-control unit (100) with monomer battery voltage Acquisition Circuit (300).
4. voltage acquisition according to claim 3 system is characterized in that, described first differential amplifier circuit (201) comprises that first differential amplifier (PU1), first isolates optocoupler (U01);
Described second differential amplifier circuit (202) comprises first differential amplifier (PU1), second differential amplifier (PU2), the second isolation optocoupler (U02);
The described first isolation optocoupler (U01) and second is isolated optocoupler (U02) and is linear optical coupling;
Wherein, the output termination first of first differential amplifier (PU1) in first differential amplifier circuit (201) is isolated the output terminal collector of optocoupler (U01), and first output terminal emitter and the micro-control unit (100) of isolating optocoupler (U01) electrically connects, negative electrode and the micro-control unit (100) of input end diode electrically connect;
The inverting input of output termination second differential amplifier (PU2) of first differential amplifier (PU1) in second differential amplifier circuit (202), the in-phase input end ground connection of second differential amplifier (PU2), output termination second are isolated the output terminal collector of optocoupler (U02), and second output terminal emitter and micro-control unit (100) that isolate optocoupler (U02) electrically connect, negative electrode and the micro-control unit (100) of input end diode electrically connect.
5. voltage acquisition according to claim 4 system, it is characterized in that, two monomer battery voltages that are connected to the cell two ends are gathered a monomer battery voltage in the optocouplers and are gathered the in-phase input end that the output terminal emitter of optocoupler is connected to first differential amplifier (PU1), and the output terminal emitter that another monomer battery voltage is gathered optocoupler then is connected to the inverting input of first differential amplifier (PU1); Two monomer battery voltages that are connected to the cell two ends are gathered a monomer battery voltage in the optocouplers and are gathered the inverting input that the output terminal emitter of optocoupler is connected to first differential amplifier (PU1), and the output terminal emitter that another monomer battery voltage is gathered optocoupler then is connected to the in-phase input end of first differential amplifier (PU1);
And the output terminal emitter of the monomer battery voltage that is connected with the positive pole of first cell collection optocoupler is connected to the in-phase input end of first differential amplifier (PU1).
6. voltage acquisition according to claim 5 system, it is characterized in that, described voltage acquisition system also comprises working power, and described monomer battery voltage gathers that optocoupler, first is isolated optocoupler (U01), second anode of isolating the input end diode of optocoupler (U02) all connects described power supply.
7. voltage acquisition according to claim 2 system is characterized in that, the negative electrode that described monomer battery voltage is gathered the input end diode of optocoupler all electrically connects with micro-control unit (100).
8. voltage acquisition according to claim 2 system is characterized in that, described voltage acquisition system also comprises battery voltage Acquisition Circuit (400) and battery voltage differential amplifier circuit (500), wherein,
Battery voltage Acquisition Circuit (400), electrically connect with micro-control unit (100) and battery voltage differential amplifier circuit (500), be used for according to the control signal of micro-control unit (100) total voltage of electric battery series connection cell being gathered;
Battery voltage differential amplifier circuit (500), electrically connect with micro-control unit (100) and battery cell Acquisition Circuit (400), be used for the voltage that battery voltage Acquisition Circuit (400) is gathered is carried out being sent to micro-control unit (100) after difference is amplified.
9. voltage acquisition according to claim 8 system is characterized in that, described battery voltage Acquisition Circuit (400) comprises that a battery voltage gathers optocoupler (U0), first resistance (R1); Described battery voltage differential amplifier circuit (500) comprises the 3rd differential amplifier (PU3), the 3rd isolation optocoupler (U03); Described battery voltage gathers optocoupler (U0) and the 3rd isolation optocoupler is linear optical coupling;
Wherein, the battery voltage output terminal collector of gathering optocoupler (U0) positive pole, the output terminal emitter that connect electric battery connects the negative pole of electric battery, negative electrode and micro-control unit (100) electric connection of input end diode by first resistance (R1);
Series connection node between first resistance (R1) and the electric battery negative pole connects the inverting input of the 3rd differential amplifier (PU3);
Series connection node between first resistance (R1) and battery voltage collection optocoupler (U0) the output terminal emitter connects the in-phase input end of the 3rd differential amplifier (PU3);
The output termination the 3rd of the 3rd differential amplifier (PU3) is isolated the output terminal collector of optocoupler (U03), and negative electrode and the micro-control unit (100) of the output terminal emitter of the 3rd optical coupled switch (U03) and micro-control unit (100) electric connection, input end diode electrically connect.
10. voltage acquisition according to claim 9 system is characterized in that, described battery voltage is gathered optocoupler (U0), the 3rd anode of isolating the input end diode of optocoupler (U03) all connects working power.
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| CN104360128A (en) * | 2014-11-03 | 2015-02-18 | 上海空间电源研究所 | Circuit and method for taking average voltage of storage battery single body |
| CN104935051A (en) * | 2015-06-30 | 2015-09-23 | 深圳市理邦精密仪器股份有限公司 | A series battery equalization circuit |
| CN108089134A (en) * | 2017-12-14 | 2018-05-29 | 成都隆航科技有限公司 | System of voltage acquisition based on optocoupler combination switch |
| CN113589026A (en) * | 2021-07-12 | 2021-11-02 | 科大国创新能科技有限公司 | High-voltage acquisition circuit based on function safety |
| CN114859258A (en) * | 2022-07-06 | 2022-08-05 | 荣耀终端有限公司 | Electricity meter and electronic equipment applied to multiple batteries |
-
2013
- 2013-03-06 CN CN 201320104856 patent/CN203178341U/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104360128A (en) * | 2014-11-03 | 2015-02-18 | 上海空间电源研究所 | Circuit and method for taking average voltage of storage battery single body |
| CN104360128B (en) * | 2014-11-03 | 2017-05-17 | 上海空间电源研究所 | Circuit and method for taking average voltage of storage battery single body |
| CN104935051A (en) * | 2015-06-30 | 2015-09-23 | 深圳市理邦精密仪器股份有限公司 | A series battery equalization circuit |
| CN108089134A (en) * | 2017-12-14 | 2018-05-29 | 成都隆航科技有限公司 | System of voltage acquisition based on optocoupler combination switch |
| CN113589026A (en) * | 2021-07-12 | 2021-11-02 | 科大国创新能科技有限公司 | High-voltage acquisition circuit based on function safety |
| CN113589026B (en) * | 2021-07-12 | 2023-07-21 | 科大国创新能科技有限公司 | High-voltage acquisition circuit based on functional safety |
| CN114859258A (en) * | 2022-07-06 | 2022-08-05 | 荣耀终端有限公司 | Electricity meter and electronic equipment applied to multiple batteries |
| CN114859258B (en) * | 2022-07-06 | 2022-12-20 | 荣耀终端有限公司 | Electricity meter and electronic equipment applied to multiple batteries |
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