CN110346731B - Battery current detection circuit for communication - Google Patents
Battery current detection circuit for communication Download PDFInfo
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- CN110346731B CN110346731B CN201910663900.7A CN201910663900A CN110346731B CN 110346731 B CN110346731 B CN 110346731B CN 201910663900 A CN201910663900 A CN 201910663900A CN 110346731 B CN110346731 B CN 110346731B
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- 238000001514 detection method Methods 0.000 title claims abstract description 42
- 238000004891 communication Methods 0.000 title claims abstract description 19
- 238000007493 shaping process Methods 0.000 claims abstract description 59
- 238000005070 sampling Methods 0.000 claims abstract description 39
- 238000012545 processing Methods 0.000 claims abstract description 34
- 239000003990 capacitor Substances 0.000 claims description 31
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 230000003321 amplification Effects 0.000 description 8
- 238000003199 nucleic acid amplification method Methods 0.000 description 8
- 230000009286 beneficial effect Effects 0.000 description 7
- 238000010586 diagram Methods 0.000 description 4
- 238000001914 filtration Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Classifications
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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
- G01R19/0092—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring current only
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]
- G01R31/385—Arrangements for measuring battery or accumulator variables
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M10/4257—Smart batteries, e.g. electronic circuits inside the housing of the cells or batteries
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03M—CODING; DECODING; CODE CONVERSION IN GENERAL
- H03M1/00—Analogue/digital conversion; Digital/analogue conversion
- H03M1/12—Analogue/digital converters
- H03M1/124—Sampling or signal conditioning arrangements specially adapted for A/D converters
- H03M1/1245—Details of sampling arrangements or methods
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M10/00—Secondary cells; Manufacture thereof
- H01M10/42—Methods or arrangements for servicing or maintenance of secondary cells or secondary half-cells
- H01M10/425—Structural combination with electronic components, e.g. electronic circuits integrated to the outside of the casing
- H01M2010/4271—Battery management systems including electronic circuits, e.g. control of current or voltage to keep battery in healthy state, cell balancing
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/10—Energy storage using batteries
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Microelectronics & Electronic Packaging (AREA)
- Manufacturing & Machinery (AREA)
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Theoretical Computer Science (AREA)
- Measurement Of Current Or Voltage (AREA)
- Secondary Cells (AREA)
Abstract
The invention relates to a battery current detection circuit for communication, which comprises a current sampling circuit, a differential amplifying circuit, a compatible converting circuit, an output shaping circuit and a central processing unit, wherein the output end of the current sampling circuit is respectively and electrically connected with the input end of the differential amplifying circuit and one input end of the compatible converting circuit, the output end of the differential amplifying circuit is electrically connected with the other input end of the compatible converting circuit, the output end of the compatible converting circuit is electrically connected with the input end of the output shaping circuit, and the output end of the output shaping circuit is electrically connected with the input end of the central processing unit. The battery current detection circuit for communication can be compatible with different sampling devices, and the output shaping circuit can detect the charge and discharge states of the battery in real time, and has the advantages of simple circuit structure and higher detection precision.
Description
Technical Field
The invention relates to the technical field of electronic circuits, in particular to a battery current detection circuit for communication.
Background
Batteries are an important necessary component in the current communication power supply system, and play an important role in the stable and reliable operation of the power supply system. Communication battery management is a critical operation related to the proper operation of the entire communication power supply system. The battery charge and discharge flow detection work is an important link of battery management and is commonly found in communication power supply monitoring equipment. The charge and discharge current of the battery is too large to easily cause potential safety hazard of a circuit, and the charge and discharge efficiency of the battery is lower due to the fact that the charge and discharge current of the battery is too small. The battery charge-discharge current detection circuit in the prior art is mostly complex, and can not detect whether the battery is in a charge state or a discharge state, and can not be compatible for different current acquisition devices, so that the application of the battery charge-discharge current detection circuit is limited to a certain extent. And the detection accuracy of the charge-discharge circuit is hardly ensured.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a battery current detection circuit for communication, aiming at the defects of the prior art.
The technical scheme for solving the technical problems is as follows: the utility model provides a battery current detection circuit for communication, includes current sampling circuit, differential amplification circuit, compatible converting circuit, output shaping circuit and central processing unit, current sampling circuit's output respectively with the input of differential amplification circuit and one input of compatible converting circuit are electric, differential amplification circuit's output with another input of compatible converting circuit is electric, compatible converting circuit's output with output shaping circuit's input is electric, output shaping circuit's output with central processing unit's input is electric to be connected.
The beneficial effects of the invention are as follows: according to the current detection circuit for communication, the charge and discharge sampling signals of the battery are collected through the current collection circuit, the sampling signals are directly output to the output shaping circuit by the compatible conversion circuit according to the device type of the current collection circuit, or are output to the output shaping circuit after differential amplification treatment by the differential amplification circuit, and finally the magnitude of current is calculated by the central processing unit, so that different sampling devices can be compatible, the charge and discharge state of the battery can be detected in real time by the output shaping circuit, the circuit structure is simple, and the detection precision is high.
Based on the technical scheme, the invention can also be improved as follows:
Further: the current sampling circuit is a Hall sensor or a current divider.
Further: the differential amplifying circuit comprises a diode ZD1, a diode ZD2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3 and an operational amplifier U1, wherein the negative output end of the current sampling circuit is electrically connected with the inverting input end of the operational amplifier U1 through the resistor R2, the positive output end of the current sampling circuit is electrically connected with the non-inverting input end of the operational amplifier U1 through the resistor R3, the negative output end of the current sampling circuit is electrically connected with the positive input end of the resistor R1, the inverting input end of the operational amplifier U1 is electrically connected with the output end through the resistor R5, the non-inverting input end of the operational amplifier U1 is grounded through the resistor R4, the non-inverting input end of the operational amplifier U1 is electrically connected with the positive electrode of the diode ZD1, the negative electrode of the diode ZD1 is electrically connected with the negative electrode of the diode ZD2, the positive electrode of the diode ZD2 is electrically connected with the positive input end of the operational amplifier U1, the positive input end of the operational amplifier is electrically connected with the output end of the operational amplifier U1, and the output end of the operational amplifier is electrically connected with the output end of the output of the operational amplifier U1 is compatible circuit.
The beneficial effects of the above-mentioned further scheme are: when the current sampling circuit adopts a current divider, the operational amplifier U1 can amplify the collected sampling signal, and the electric signal in millivolt level is converted into the electric signal in volt level.
Further: the compatible converting circuit is a connection plug JMP1, one input end of the connection plug JMP1 is electrically connected with the positive output end of the current sampling circuit, the other input end of the connection plug JMP1 is electrically connected with the output end of the operational amplifier U1, and the output end of the connection plug JMP1 is electrically connected with the input end of the output shaping circuit.
The beneficial effects of the above-mentioned further scheme are: when the current acquisition circuit is a Hall sensor, one input end is connected with the output end through the compatible conversion circuit, so that a signal detected by the Hall sensor is directly sent to the output shaping circuit for output; when the current acquisition circuit is a current divider, the other input end of the current acquisition circuit is in short circuit with the output end, so that the output of the operational amplifier U1 is in circuit connection with the input of the output shaping circuit, and the amplified voltage signal detected by the current divider is sent to the output shaping circuit for output; by changing the connection plug JMP1 circuit connection, two front-end detection signals of the compatible current divider and the Hall sensor can be realized.
Further: the output shaping circuit comprises an integrating circuit, a shaping circuit and a charge-discharge detection circuit, wherein the input end of the integrating circuit is electrically connected with the output end of the compatible conversion circuit, the output end of the integrating circuit is respectively electrically connected with the input end of the shaping circuit and the input end of the charge-discharge detection circuit, the output end of the shaping circuit is electrically connected with one input end of the central processing unit, and the output end of the charge-discharge detection circuit is electrically connected with the other input end of the central processing unit.
The beneficial effects of the above-mentioned further scheme are: the sampling signals collected by the current divider or the electric signals output by the differential amplifying circuit are amplified and integrated by the integrating circuit, the signals output by the integrating circuit can be shaped and output outwards by the shaping circuit, and the level signals output by the charge and discharge detection circuit can be used for conveniently judging the charge and discharge states of the battery by the central processing unit, so that whether the charge and discharge current of the battery accords with the corresponding set range can be accurately detected, and whether the charge and discharge of the battery are normal or not can be conveniently judged by the central processing unit.
Further: the integrating circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R12, a diode D1, an operational amplifier U2, a capacitor C4, a capacitor C5 and a capacitor C6, wherein the output end of the compatible converting circuit is electrically connected with the inverting input end of the operational amplifier U2 through the resistor R7, the resistor R6 and the resistor R8 are sequentially connected in series between the output end of the compatible converting circuit and the non-inverting input end of the operational amplifier U2, the common ground of the resistor R6 and the resistor R8 is grounded, the negative power input end of the operational amplifier U2 is electrically connected with an external negative power supply, the capacitor C5 is electrically connected between the negative power input end of the operational amplifier U2 and the ground, the capacitor C6 is electrically connected between the positive power input end of the operational amplifier U2 and the ground, the capacitor C4 is electrically connected between the inverting input end of the operational amplifier U2 and the output end of the operational amplifier U2, the negative power input end of the operational amplifier U2 is electrically connected with the inverting input end of the diode D1 and the output end of the operational amplifier U2, and the output end of the diode D is electrically connected with the inverting input end of the operational amplifier U2.
The beneficial effects of the above-mentioned further scheme are: the sampling signal collected by the current divider or the electric signal output by the differential amplifying circuit can be amplified and integrated by the integrating circuit, and the diode D1 prevents reverse current from flowing, so that safe and stable operation of the circuit is ensured.
Further: the shaping circuit comprises a resistor R13, a diode ZD3 and a capacitor C7, wherein the resistor R13 is electrically connected between the cathode of the diode D1 and one input end of the central processing unit, one input end of the central processing unit is electrically connected with the cathode of the diode ZD3, the anode of the diode ZD3 is grounded, and the capacitor C7 is electrically connected between one input end of the central processing unit and the ground.
The beneficial effects of the above-mentioned further scheme are: the shaping circuit can be used for shaping and filtering the electric signal output by the integrating circuit, so that the quality of the output electric signal is ensured.
Further: the charge and discharge detection circuit comprises a resistor R9, a resistor R10, a resistor R11 and a triode Q1, wherein the output end of the operational amplifier U2 is electrically connected with the base electrode of the triode Q1 through the resistor R9, the base electrode of the triode Q1 is electrically connected with an external power supply through the resistor R10, the emitting electrode of the triode Q1 is grounded, the collecting electrode of the triode Q1 is electrically connected with the external power supply through the resistor R11, and the collecting electrode of the triode Q1 is electrically connected with the other input end of the central processing unit.
The beneficial effects of the above-mentioned further scheme are: the level output by the collector electrode of the triode Q1 can be used for facilitating the CPU to accurately judge the charge and discharge states of the battery, so that signals output by the shaping circuit are compared with the preset corresponding charge and discharge current ranges to determine whether the charge and discharge of the battery are normal or not.
Drawings
Fig. 1 is a block diagram showing a configuration of a battery current detection circuit for communication according to the present invention;
FIG. 2 is a schematic diagram of a differential amplifier circuit according to the present invention;
FIG. 3 is a block diagram of an output shaping circuit according to the present invention;
Fig. 4 is a circuit diagram of the output shaping circuit of the present invention.
Detailed Description
The principles and features of the present invention are described below with reference to the drawings, the examples are illustrated for the purpose of illustrating the invention and are not to be construed as limiting the scope of the invention.
As shown in fig. 1, the battery current detection circuit for communication comprises a current sampling circuit, a differential amplifying circuit, a compatible converting circuit, an output shaping circuit and a central processing unit, wherein the output end of the current sampling circuit is respectively and electrically connected with the input end of the differential amplifying circuit and one input end of the compatible converting circuit, the output end of the differential amplifying circuit is electrically connected with the other input end of the compatible converting circuit, the output end of the compatible converting circuit is electrically connected with the input end of the output shaping circuit, and the output end of the output shaping circuit is electrically connected with the input end of the central processing unit.
According to the current detection circuit for communication, the charge and discharge sampling signals of the battery are collected through the current collection circuit, the sampling signals are directly output to the output shaping circuit by the compatible conversion circuit according to the device type of the current collection circuit, or are output to the output shaping circuit after differential amplification treatment by the differential amplification circuit, and finally the magnitude of current is calculated by the central processing unit, so that different sampling devices can be compatible, the charge and discharge state of the battery can be detected in real time by the output shaping circuit, the circuit structure is simple, and the detection precision is high.
In one or more embodiments of the present invention, the current sampling circuit is a hall sensor or a shunt. Hall sensors can measure currents and voltages of arbitrary waveforms, such as: direct current, alternating current, pulse waveform and the like, and even the measurement of transient peaks, the secondary side current faithfully reflects the waveform of the primary side current. The current divider is actually a resistor with small resistance, and when direct current passes through the current divider, a millivolt direct current voltage signal is generated and is processed by the differential amplifier and then sent to the output shaping circuit.
As shown in fig. 2, in one or more embodiments of the present invention, the differential amplifying circuit includes a diode ZD1, a diode ZD2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3, and an operational amplifier U1, the negative output terminal of the current sampling circuit is electrically connected to the inverting input terminal of the operational amplifier U1 through the resistor R2, the positive output terminal of the current sampling circuit is electrically connected to the non-inverting input terminal of the operational amplifier U1 through the resistor R3, the negative output terminal of the current sampling circuit is electrically connected to the positive input terminal of the operational amplifier U1 through the resistor R5, the non-inverting input terminal of the operational amplifier U1 is grounded through the resistor R4, the negative input terminal of the operational amplifier U1 is electrically connected to the positive electrode of the diode 1, the negative electrode of the diode ZD2 is electrically connected to the positive input terminal of the operational amplifier U1, the negative input terminal of the operational amplifier is electrically connected to the negative input terminal of the operational amplifier U1, and the positive input terminal of the output terminal of the operational amplifier is electrically connected to the negative input terminal of the operational amplifier U1 is electrically connected to the positive input terminal of the output terminal of the operational amplifier U1.
When the current sampling circuit adopts a current divider, the operational amplifier U1 can amplify the collected sampling signal, and the electric signal in millivolt level is converted into the electric signal in volt level.
Here, the OP07C high-precision operational amplifier is used as the core of the operational amplifier U1. It is characterized in that: very low imbalance: 150uV/MAX; low input bias current: 1.8nA; vi o low temperature drift: 0.5 uV/. Degree.C; ultrastable time: maximum 2 uV/month; wide supply voltage range: 3V to 22V; temperature range: -40 ℃ to +105 ℃. The OP07C high-precision differential amplifying circuit with 43 times of amplifying output converts the millivolt-level voltage signal of the shunt into a volt-level voltage signal.
In one or more embodiments of the present invention, the compatible converting circuit is a connection plug JMP1, one input end of the connection plug JMP1 is electrically connected to the positive output end of the current sampling circuit, the other input end of the connection plug JMP1 is electrically connected to the output end of the operational amplifier U1, and the output end of the connection plug JMP1 is electrically connected to the input end of the output shaping circuit.
When the current acquisition circuit is a Hall sensor, one input end is connected with the output end through the compatible conversion circuit, so that a signal detected by the Hall sensor is directly sent to the output shaping circuit for output; when the current acquisition circuit is a current divider, the other input end of the current acquisition circuit is in short circuit with the output end, so that the output of the operational amplifier U1 is in circuit connection with the input end of the output shaping circuit, and the amplified voltage signal detected by the current divider is sent to the output shaping circuit for output; by changing the connection plug JMP1 circuit connection, two front-end detection signals of the compatible current divider and the Hall sensor can be realized.
As shown in fig. 2, pin 1 of the connection plug JMP1 is electrically connected to the output end of the operational amplifier U1, pin 3 of the connection plug JMP1 is electrically connected to the positive output end of the current sampling circuit, and pin 2 of the connection plug JMP1 is electrically connected to the input end of the output shaping circuit. When the current sampling circuit device is a current divider, the 1 pin and the 2 pin of the JMP1 are short-circuited, the output of the operational amplifier U1 is in circuit connection with the input end of the output shaping circuit, and the amplified voltage signal detected by the current divider is sent to the output shaping circuit for output; when the external detection device is a Hall sensor, the pins 2 and 3 of JMP1 are short-circuited, so that the differential amplifying circuit is shielded, and the current quantity detection signal of the Hall sensor is directly sent into the output shaping circuit for output.
In one or more embodiments of the present invention, as shown in fig. 3, the output shaping circuit includes an integrating circuit, a shaping circuit, and a charge-discharge detection circuit, where an input end of the integrating circuit is electrically connected to an output end of the compatible converting circuit, an output end of the integrating circuit is electrically connected to an input end of the shaping circuit and an input end of the charge-discharge detection circuit, respectively, an output end of the shaping circuit is electrically connected to one input end of the central processor, and an output end of the charge-discharge detection circuit is electrically connected to another input end of the central processor.
The sampling signals collected by the current divider or the electric signals output by the differential amplifying circuit are amplified and integrated by the integrating circuit, the signals output by the integrating circuit can be shaped and output outwards by the shaping circuit, and the level signals output by the charge and discharge detection circuit can be used for conveniently judging the charge and discharge states of the battery by the central processing unit, so that whether the charge and discharge current of the battery accords with the corresponding set range can be accurately detected, and whether the charge and discharge of the battery are normal or not can be conveniently judged by the central processing unit.
As shown in fig. 4, in one or more embodiments of the present invention, the integrating circuit includes a resistor R6, a resistor R7, a resistor R8, a resistor R12, a diode D1, an operational amplifier U2, a capacitor C4, a capacitor C5, and a capacitor C6, an output terminal of the compatible switching circuit is electrically connected to an inverting input terminal of the operational amplifier U2 through the resistor R7, the resistor R6 and the resistor R8 are sequentially connected in series between an output terminal of the compatible switching circuit and an in-phase input terminal of the operational amplifier U2, a negative power input terminal of the operational amplifier U2 is electrically connected to an external negative power supply, a positive power input terminal of the operational amplifier U2 is electrically connected to an external positive power supply, the capacitor C6 is electrically connected between a positive power input terminal of the operational amplifier U2 and the ground, a negative power input terminal of the operational amplifier U2 is electrically connected to an inverting input terminal of the operational amplifier U2, and an output terminal of the operational amplifier U2 are electrically connected to an inverting input terminal of the operational amplifier D2 through a diode D2, and an output terminal of the operational amplifier D2 are electrically connected to an inverting input terminal of the operational amplifier D2.
The sampling signal collected by the current divider or the electric signal output by the differential amplifying circuit can be amplified and integrated by the integrating circuit, and the diode D1 prevents reverse current from flowing, so that safe and stable operation of the circuit is ensured.
In one or more embodiments of the present invention, the shaping circuit includes a resistor R13, a diode ZD3, and a capacitor C7, where the resistor R13 is electrically connected between a cathode of the diode D1 and an input terminal of the central processing unit, the input terminal of the central processing unit is electrically connected to the cathode of the diode ZD3, an anode of the diode ZD3 is grounded, and the capacitor C7 is electrically connected between the input terminal of the central processing unit and ground.
The shaping circuit can be used for shaping and filtering the electric signal output by the integrating circuit, so that the quality of the output electric signal is ensured.
In one or more embodiments of the present invention, the charge-discharge detection circuit includes a resistor R9, a resistor R10, a resistor R11, and a triode Q1, where an output end of the operational amplifier U2 is electrically connected to a base electrode of the triode Q1 through the resistor R9, the base electrode of the triode Q1 is electrically connected to an external power supply through the resistor R10, an emitter electrode of the triode Q1 is grounded, a collector electrode of the triode Q1 is electrically connected to the external power supply through the resistor R11, and a collector electrode of the triode Q1 is electrically connected to another input end of the central processing unit.
The level output by the collector electrode of the triode Q1 can be used for facilitating the CPU to accurately judge the charge and discharge states of the battery, so that signals output by the shaping circuit are compared with the preset corresponding charge and discharge current ranges to determine whether the charge and discharge of the battery are normal or not.
Specifically, when the voltage difference between the positive input end v+ and the negative input end V-of the differential amplification circuit is a positive value, the output of the operational amplifier U2 is high level, the triode Q1 is turned on, the output signal BATCF of the charge and discharge detection circuit is a 0.7V voltage signal, and the voltage signal is sent to the central processing unit, and the central processing unit performs logic judgment to identify that the battery is in a charging state; when the voltage difference of V+ and V-is negative, the operational amplifier U2 outputs zero level or negative value, the triode Q1 is cut off, the output signal BATCF of the charge-discharge detection circuit is a 5V voltage signal, the 5V voltage signal is sent to the central processing unit, the central processing unit carries out logic judgment to identify that the battery is in a discharge state, and then the output signal BATIV of the shaping circuit is compared with a corresponding charge-discharge current setting range, so that whether the charge-discharge of the battery is normal or not is judged.
In addition, in the embodiment of the present invention, the central processing unit may be a microprocessor such as an existing 51-series single chip microcomputer or a CPU, and detailed descriptions of how to determine whether the charge and discharge of the battery are normal according to the signal output by the shaping circuit are omitted in the present invention.
The foregoing description of the preferred embodiments of the invention is not intended to limit the invention to the precise form disclosed, and any such modifications, equivalents, and alternatives falling within the spirit and scope of the invention are intended to be included within the scope of the invention.
Claims (4)
1. A battery current detection circuit for communication, characterized in that: the output end of the current sampling circuit is electrically connected with the input end of the differential amplifying circuit and one input end of the compatible converting circuit respectively, the output end of the differential amplifying circuit is electrically connected with the other input end of the compatible converting circuit, the output end of the compatible converting circuit is electrically connected with the input end of the output shaping circuit, and the output end of the output shaping circuit is electrically connected with the input end of the central processing unit;
the current sampling circuit is a Hall sensor or a shunt;
The differential amplifying circuit comprises a diode ZD1, a diode ZD2, a resistor R1, a resistor R2, a resistor R3, a resistor R4, a resistor R5, a capacitor C1, a capacitor C2, a capacitor C3 and an operational amplifier U1, wherein the negative output end of the current sampling circuit is electrically connected with the inverting input end of the operational amplifier U1 through the resistor R2, the positive output end of the current sampling circuit is electrically connected with the non-inverting input end of the operational amplifier U1 through the resistor R3, the negative output end of the current sampling circuit is electrically connected with the positive input end, the inverting input end of the operational amplifier U1 is electrically connected with the output end through the resistor R5, the non-inverting input end of the operational amplifier U1 is grounded through the resistor R4, the non-inverting input end of the operational amplifier U1 is electrically connected with the positive electrode of the operational amplifier U1, the negative electrode of the diode ZD1 is electrically connected with the negative electrode of the diode ZD2, the positive electrode of the diode ZD2 is electrically connected with the positive electrode of the non-inverting input end of the operational amplifier U1, the positive electrode of the operational amplifier U1 is electrically connected with the output end of the external power supply, and the output end of the operational amplifier is electrically connected with the output end of the compatible amplifier U1;
The output shaping circuit comprises an integrating circuit, a shaping circuit and a charge-discharge detection circuit, wherein the input end of the integrating circuit is electrically connected with the output end of the compatible conversion circuit, the output end of the integrating circuit is respectively electrically connected with the input end of the shaping circuit and the input end of the charge-discharge detection circuit, the output end of the shaping circuit is electrically connected with one input end of the central processing unit, and the output end of the charge-discharge detection circuit is electrically connected with the other input end of the central processing unit;
The integrating circuit comprises a resistor R6, a resistor R7, a resistor R8, a resistor R12, a diode D1, an operational amplifier U2, a capacitor C4, a capacitor C5 and a capacitor C6, wherein the output end of the compatible converting circuit is electrically connected with the inverting input end of the operational amplifier U2 through the resistor R7, the resistor R6 and the resistor R8 are sequentially connected in series between the output end of the compatible converting circuit and the non-inverting input end of the operational amplifier U2, the common ground of the resistor R6 and the resistor R8 is grounded, the negative power input end of the operational amplifier U2 is electrically connected with an external negative power supply, the capacitor C5 is electrically connected between the negative power input end of the operational amplifier U2 and the ground, the capacitor C6 is electrically connected between the positive power input end of the operational amplifier U2 and the ground, the capacitor C4 is electrically connected between the inverting input end of the operational amplifier U2 and the output end of the operational amplifier U2, the negative power input end of the operational amplifier U2 is electrically connected with the inverting input end of the diode D1 and the output end of the operational amplifier U2, and the output end of the diode D is electrically connected with the inverting input end of the operational amplifier U2.
2. The battery current detection circuit for communication according to claim 1, wherein: the compatible converting circuit is a connection plug JMP1, one input end of the connection plug JMP1 is electrically connected with the positive output end of the current sampling circuit, the other input end of the connection plug JMP1 is electrically connected with the output end of the operational amplifier U1, and the output end of the connection plug JMP1 is electrically connected with the input end of the output shaping circuit.
3. The battery current detection circuit for communication according to claim 1, wherein: the shaping circuit comprises a resistor R13, a diode ZD3 and a capacitor C7, wherein the resistor R13 is electrically connected between the cathode of the diode D1 and one input end of the central processing unit, one input end of the central processing unit is electrically connected with the cathode of the diode ZD3, the anode of the diode ZD3 is grounded, and the capacitor C7 is electrically connected between one input end of the central processing unit and the ground.
4. The battery current detection circuit for communication according to claim 1, wherein: the charge and discharge detection circuit comprises a resistor R9, a resistor R10, a resistor R11 and a triode Q1, wherein the output end of the operational amplifier U2 is electrically connected with the base electrode of the triode Q1 through the resistor R9, the base electrode of the triode Q1 is electrically connected with an external power supply through the resistor R10, the emitting electrode of the triode Q1 is grounded, the collecting electrode of the triode Q1 is electrically connected with the external power supply through the resistor R11, and the collecting electrode of the triode Q1 is electrically connected with the other input end of the central processing unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663900.7A CN110346731B (en) | 2019-07-23 | 2019-07-23 | Battery current detection circuit for communication |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910663900.7A CN110346731B (en) | 2019-07-23 | 2019-07-23 | Battery current detection circuit for communication |
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| FR2522152A1 (en) * | 1982-02-23 | 1983-08-26 | Intercontrole Sa | |
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| CN106324332A (en) * | 2015-07-06 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Current sampling circuit of battery management system |
| CN106501722A (en) * | 2016-09-02 | 2017-03-15 | 安徽锐普电子有限公司 | A kind of battery voltage detection circuit and detecting voltage method |
| CN210514565U (en) * | 2019-07-23 | 2020-05-12 | 武汉洲际电讯科技股份有限公司 | Battery current detection circuit for communication |
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| FR2522152A1 (en) * | 1982-02-23 | 1983-08-26 | Intercontrole Sa | |
| CN202929095U (en) * | 2012-12-10 | 2013-05-08 | Tcl集团股份有限公司 | AC over-current detection device |
| CN103616914A (en) * | 2013-11-26 | 2014-03-05 | 苏州贝克微电子有限公司 | High-speed drive circuit of switching regulator |
| CN106324332A (en) * | 2015-07-06 | 2017-01-11 | 深圳市沃特玛电池有限公司 | Current sampling circuit of battery management system |
| CN106501722A (en) * | 2016-09-02 | 2017-03-15 | 安徽锐普电子有限公司 | A kind of battery voltage detection circuit and detecting voltage method |
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