CN210514565U - Battery current detection circuit for communication - Google Patents
Battery current detection circuit for communication Download PDFInfo
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- CN210514565U CN210514565U CN201921156043.3U CN201921156043U CN210514565U CN 210514565 U CN210514565 U CN 210514565U CN 201921156043 U CN201921156043 U CN 201921156043U CN 210514565 U CN210514565 U CN 210514565U
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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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Abstract
The utility model relates to a battery current detection circuit for communication, including current sampling circuit, differential amplifier circuit, compatible converting circuit, output plastic circuit and central processing unit, current sampling circuit's output is connected with differential amplifier circuit's input and compatible converting circuit's an input electricity respectively, and differential amplifier circuit's output is connected with another input electricity of compatible converting circuit, and compatible converting circuit's output is connected with output plastic circuit's input electricity, and output plastic circuit's output is connected with central processing unit's input electricity. The utility model discloses a communication is with battery current detection circuit, sampling device that can compatible difference to output plastic circuit can the real-time detection battery the charge-discharge state, circuit structure is simple, and it is higher to detect the precision.
Description
Technical Field
The utility model relates to an electronic circuit technical field especially relates to a battery current detection circuit for communication.
Background
At present, a battery in a communication power supply system is an important necessary component, and plays an important role in stable and reliable operation of the power supply system. The management of the battery for communication is a critical work, and is related to the normal operation of the whole communication power supply system. The detection work of the charging and discharging current of the battery is an important link of battery management and generally exists in communication power supply monitoring equipment. The charge and discharge current of the battery is too large, which easily causes the potential safety hazard of the circuit, and the charge and discharge efficiency is low. Most of battery charging and discharging current detection circuits in the prior art are complex, cannot detect whether a battery is in a charging state or a discharging state, and cannot be compatible with different current acquisition devices, so that the application of the battery charging and discharging current detection circuits is limited to a certain extent. And the detection precision of the charging and discharging circuit is difficult to guarantee.
Disclosure of Invention
The utility model aims to solve the technical problem that to the not enough of above-mentioned prior art, a battery current detection circuit is provided for communication.
The utility model provides an above-mentioned technical problem's technical scheme as follows: a battery current detection circuit for communication comprises a current sampling circuit, a differential amplification circuit, a compatible conversion circuit, an output shaping circuit and a central processing unit, wherein the output end of the current sampling circuit is electrically connected with the input end of the differential amplification circuit and one input end of the compatible conversion circuit respectively, the output end of the differential amplification circuit is electrically connected with the other input end of the compatible conversion circuit, the output end of the compatible conversion 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 utility model has the advantages that: the utility model discloses a communication is with current detection circuit, through the charge-discharge sampling signal of battery is gathered to current acquisition circuit to by compatible converting circuit according to current acquisition circuit's device type with sampling signal direct output to output plastic circuit or pass through earlier differential amplifier circuit carries out difference amplification and exports to output plastic circuit after handling again, calculates the size of electric current by central processing unit at last, can compatible different sampling device, and output plastic circuit can the real-time detection battery the charge-discharge state, circuit structure is simple, and the detection precision is higher.
On the basis of the technical scheme, the utility model discloses can also do as follows the improvement:
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 resistor R1 is electrically connected between the negative output end and the positive input end of the current sampling circuit, 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 1, and the negative electrode of the diode ZD1 is electrically connected with, the anode of the diode ZD2 is grounded, the negative power supply input end of the operational amplifier U1 is electrically connected to an external negative power supply, the output end of the operational amplifier U1 is grounded through the capacitor C3, the positive power supply input end of the operational amplifier U1 is electrically connected to an external positive power supply, the positive output end of the current sampling circuit is electrically connected to one input end of the compatible conversion circuit, and the output end of the operational amplifier U1 is electrically connected to the other input end of the compatible conversion circuit.
The beneficial effects of the further scheme are as follows: when the current sampling circuit adopts a current divider, the operational amplifier U1 amplifies the collected sampling signal, and converts the millivolt level electrical signal into the volt level electrical signal.
Further: the compatible conversion 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 further scheme are as follows: when the current acquisition circuit is a Hall sensor, one input end of the compatible conversion circuit can be connected with the output end of 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 shunt, 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 voltage signal detected and amplified by the shunt is sent to the output shaping circuit for output; by changing the circuit connection of the connecting plug JMP1, two front-end detection signals of the current divider and the Hall sensor can be compatible.
Further: the output shaping circuit comprises an integrating circuit, a shaping circuit and a charging and discharging 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 electrically connected with the input end of the shaping circuit and the input end of the charging and discharging detection circuit respectively, 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 charging and discharging detection circuit is electrically connected with the other input end of the central processing unit.
The beneficial effects of the further scheme are as follows: the sampling signal collected by the current divider or the electric signal output by the differential amplification circuit is amplified and integrated by the integration circuit, the signal output by the integration circuit can be shaped by the shaping circuit and is output externally, and the level signal output by the charging and discharging detection circuit can facilitate the central processing unit to judge the charging and discharging state of the battery, so that whether the charging and discharging current of the battery conforms to the corresponding set range can be accurately detected, and the central processing unit can conveniently judge whether the charging and discharging of the battery are normal.
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, 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 end of the resistor R6 and the resistor R8 is grounded, the negative power supply 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 supply input end of the operational amplifier U2 and the ground, the positive power supply input end of the operational amplifier U2 is electrically connected with an external positive power supply, the capacitor C6 is electrically connected between the positive power supply input end of the operational amplifier U2 and the ground, the capacitor C4 is electrically connected between the inverting input end and the output end of the operational amplifier, the inverting input end of the operational amplifier U2 is electrically connected with the cathode of the diode D1 through the resistor R12, the anode of the diode D1 is electrically connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is electrically connected with the input end of the shaping circuit and the input end of the charge-discharge detection circuit respectively.
The beneficial effects of the further scheme are as follows: the sampling signal collected by the current divider or the electric signal output by the differential amplification circuit can be amplified and integrated by the integration circuit, and the diode D1 prevents reverse current from flowing through, so that the 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 further scheme are as follows: 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 connected with the base electrode of the triode Q1 through a resistor R9, the base electrode of the triode Q1 is connected with an external power supply through the resistor R10, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the external power supply through a resistor R11, and the collector electrode of the triode Q1 is electrically connected with the other input end of the central processing unit.
The beneficial effects of the further scheme are as follows: the central processing unit can conveniently judge the charging and discharging state of the battery accurately according to the level output by the collector of the triode Q1, so that the signal output by the shaping circuit is compared with the preset corresponding charging and discharging current range to determine whether the charging and discharging of the battery are normal.
Drawings
Fig. 1 is a block diagram of a battery current detection circuit for communication according to the present invention;
fig. 2 is a schematic circuit diagram of the differential amplifier circuit of the present invention;
fig. 3 is a block diagram of the output shaping circuit according to the present invention;
fig. 4 is a schematic circuit diagram of the output shaping circuit according to the present invention.
Detailed Description
The principles and features of the present invention are described below in conjunction with the following drawings, the examples given are only intended to illustrate the present invention and are not intended to limit the scope of the present invention.
As shown in fig. 1, a battery current detection circuit for communication includes a current sampling circuit, a differential amplifier circuit, a compatible converter circuit, an output shaping circuit, and a central processing unit, wherein an output terminal of the current sampling circuit is electrically connected to an input terminal of the differential amplifier circuit and an input terminal of the compatible converter circuit, an output terminal of the differential amplifier circuit is electrically connected to another input terminal of the compatible converter circuit, an output terminal of the compatible converter circuit is electrically connected to an input terminal of the output shaping circuit, and an output terminal of the output shaping circuit is electrically connected to an input terminal of the central processing unit.
The utility model discloses a communication is with current detection circuit, through the charge-discharge sampling signal of battery is gathered to current acquisition circuit to by compatible converting circuit according to current acquisition circuit's device type with sampling signal direct output to output plastic circuit or pass through earlier differential amplifier circuit carries out difference amplification and exports to output plastic circuit after handling again, calculates the size of electric current by central processing unit at last, can compatible different sampling device, and output plastic circuit can the real-time detection battery the charge-discharge state, circuit structure is simple, and the detection precision is higher.
In one or more embodiments provided by the present invention, the current sampling circuit is a hall sensor or a shunt. The hall sensor can measure current and voltage of any waveform, such as: direct current, alternating current, pulse waveforms and the like, even for the measurement of transient peak values, the secondary current faithfully reflects the waveform of the primary current. The shunt is actually a resistor with a small resistance value, and when direct current flows, millivolt direct current voltage signals are generated and are sent to the output shaping circuit after being processed by the differential amplifier.
As shown in fig. 2, in one or more embodiments of the present invention, the differential amplifier 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 resistor R1 is electrically connected between the negative output terminal and the positive input terminal of the current sampling circuit, the inverting input terminal of the operational amplifier U1 is electrically connected to the output terminal through the resistor R5, the non-inverting input terminal of the operational amplifier U1 is grounded through the resistor R4, the non-inverting input terminal of the operational amplifier U1 is electrically connected to the positive electrode of the diode ZD 58, 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 grounded, the negative power supply input end of the operational amplifier U1 is electrically connected with an external negative power supply, the output end of the operational amplifier U1 is grounded through the capacitor C3, the positive power supply input end of the operational amplifier U1 is electrically connected with an external positive power supply, the positive output end of the current sampling circuit is electrically connected with one input end of the compatible conversion circuit, and the output end of the operational amplifier U1 is electrically connected with the other input end of the compatible conversion circuit.
When the current sampling circuit adopts a current divider, the operational amplifier U1 amplifies the collected sampling signal, and converts the millivolt level electrical signal into the volt level electrical signal.
Here, the OP07C high-precision operational amplifier is used as a core of the operational amplifier U1. It is characterized in that: very low offset: 150 uV/MAX; low input bias current: 1.8 nA; vi o low temperature drift: 0.5uV/° C; ultra-stable time: maximum 2 uV/month; wide supply voltage range: + -3V to + -22V; temperature range: -40 ℃ to +105 ℃. The voltage signal of millivolt unit of the current divider is converted into a voltage signal of volt unit by an OP07C high-precision differential amplifying circuit which amplifies the output by 43 times.
In one or more embodiments of the present invention, the compatible converting circuit inserts JMP1 for the connection, an input end of the connection insertion JMP1 is electrically connected to the positive output end of the current sampling circuit, another input end of the connection insertion JMP1 is electrically connected to the output end of the operational amplifier U1, an output end of the connection insertion 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 of the compatible conversion circuit can be connected with the output end of 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 shunt, 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 voltage signal detected and amplified by the shunt is sent to the output shaping circuit for output; by changing the circuit connection of the connecting plug JMP1, two front-end detection signals of the current divider and the Hall sensor can be compatible.
As shown in fig. 2, pin No. 1 of the connection plug JMP1 is electrically connected to the output terminal of the operational amplifier U1, pin No. 3 of the connection plug JMP1 is electrically connected to the positive output terminal of the current sampling circuit, and pin No. 2 of the JMP1 is electrically connected to the input terminal of the output shaping circuit. When the current sampling circuit device is a shunt, the 1 pin and the 2 pin of the JMP1 are in short circuit, the output of the operational amplifier U1 is in circuit connection with the input end of the output shaping circuit, and the voltage signal detected and amplified by the shunt is sent to the output shaping circuit for output; when the external detection device is a Hall sensor, the pins 2 and 3 of the JMP1 are short-circuited, so that the differential amplification circuit is shielded, and the current quantity detection signal of the Hall sensor is directly sent to the output shaping circuit for output.
As shown in fig. 3, in one or more embodiments of the utility model, output shaping circuit includes integrating circuit, shaping circuit and charge-discharge detection circuit, integrating circuit's input with compatible converting circuit's output electricity is connected, integrating circuit's output respectively with shaping circuit's input and charge-discharge detection circuit's input electricity are connected, shaping circuit's output with an input electricity of central processing unit is connected, charge-discharge detection circuit's output with another input electricity of central processing unit is connected.
The sampling signal collected by the current divider or the electric signal output by the differential amplification circuit is amplified and integrated by the integration circuit, the signal output by the integration circuit can be shaped by the shaping circuit and is output externally, and the level signal output by the charging and discharging detection circuit can facilitate the central processing unit to judge the charging and discharging state of the battery, so that whether the charging and discharging current of the battery conforms to the corresponding set range can be accurately detected, and the central processing unit can conveniently judge whether the charging and discharging of the battery are normal.
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, the output terminal of the compatible converting circuit is electrically connected to the inverting input terminal of the operational amplifier U2 through the resistor R7, the resistor R6 and the resistor R8 are connected in series between the output terminal of the compatible converting circuit and the non-inverting input terminal of the operational amplifier U2, a common terminal of the resistor R6 and the resistor R8 is grounded, the negative power input terminal of the operational amplifier U2 is electrically connected to an external negative power supply, the capacitor C5 is electrically connected between the negative power input terminal of the operational amplifier U2 and the ground, the 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 the positive power input terminal of the operational amplifier U2 and the ground, the capacitor C4 is electrically connected between the reverse input end and the output end of the operational amplifier U2, the reverse input end of the operational amplifier U2 is electrically connected with the cathode of the diode D1 through the resistor R12, the anode of the diode D1 is electrically connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is electrically connected with the input end of the shaping circuit and the input end of the charge-discharge detection circuit respectively.
The sampling signal collected by the current divider or the electric signal output by the differential amplification circuit can be amplified and integrated by the integration circuit, and the diode D1 prevents reverse current from flowing through, so that the 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, the negative pole of the diode D1 and the electric connection between one input end of the central processing unit are connected with the resistor R13, one input end of the central processing unit is connected with the negative pole of the diode ZD3, the positive pole of the diode ZD3 is grounded, and the electric connection between one input end of the central processing unit and the ground is connected with the capacitor C7.
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 charging and discharging detection circuit includes a resistor R9, a resistor R10, a resistor R11 and a transistor Q1, the output end of the operational amplifier U2 passes through the resistor R9 and the base of the transistor Q1 are electrically connected, the base of the transistor Q1 passes through the resistor R10 and the external power supply are electrically connected, the emitter of the transistor Q1 is grounded, the collector of the transistor Q1 passes through the resistor R11 and the external power supply are electrically connected, and the collector of the transistor Q1 is electrically connected to another input end of the cpu.
The central processing unit can conveniently judge the charging and discharging state of the battery accurately according to the level output by the collector of the triode Q1, so that the signal output by the shaping circuit is compared with the preset corresponding charging and discharging current range to determine whether the charging and discharging of the battery are normal.
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 a high level, the triode Q1 is conducted, the output signal BATCF of the charge-discharge detection circuit is a 0.7V voltage signal and is sent to the central processing unit, and the central processing unit carries out logic judgment to identify the charging state of the battery; when the voltage difference between V + and V-is a negative value, the output of the operational amplifier U2 is zero level or a negative value, the triode Q1 is cut off, the output signal BATCF of the charging and discharging detection circuit is a 5V voltage signal, the voltage signal is sent to the central processing unit, the central processing unit carries out logic judgment to carry out logic, namely, the discharging state of the battery can be identified, and then the output signal BATIV of the shaping circuit is compared with the corresponding charging and discharging current setting range, so that whether the charging and discharging of the battery are normal or not is judged.
Additionally, in the embodiment of the utility model, central processing unit adopt current micro-processor such as 51 series singlechip or CPU can, specifically how to according to the charge-discharge of the signal judgement battery of shaping circuit output is normally prior art, the utility model discloses well no longer detailed description.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention, and any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention should be included within the protection scope of the present invention.
Claims (8)
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.
2. The battery current detection circuit for communication according to claim 1, wherein: the current sampling circuit is a Hall sensor or a current divider.
3. The battery current detection circuit for communication according to claim 1, wherein: 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 resistor R1 is electrically connected between the negative output end and the positive input end of the current sampling circuit, 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 1, and the negative electrode of the diode ZD1 is electrically connected with, the anode of the diode ZD2 is grounded, the negative power supply input end of the operational amplifier U1 is electrically connected to an external negative power supply, the output end of the operational amplifier U1 is grounded through the capacitor C3, the positive power supply input end of the operational amplifier U1 is electrically connected to an external positive power supply, the positive output end of the current sampling circuit is electrically connected to one input end of the compatible conversion circuit, and the output end of the operational amplifier U1 is electrically connected to the other input end of the compatible conversion circuit.
4. The battery current detection circuit for communication according to claim 1, wherein: the compatible conversion 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.
5. The battery current detection circuit for communication according to any one of claims 1 to 4, wherein: the output shaping circuit comprises an integrating circuit, a shaping circuit and a charging and discharging 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 electrically connected with the input end of the shaping circuit and the input end of the charging and discharging detection circuit respectively, 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 charging and discharging detection circuit is electrically connected with the other input end of the central processing unit.
6. The battery current detection circuit for communication according to claim 5, wherein: 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, 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 end of the resistor R6 and the resistor R8 is grounded, the negative power supply 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 supply input end of the operational amplifier U2 and the ground, the positive power supply input end of the operational amplifier U2 is electrically connected with an external positive power supply, the capacitor C6 is electrically connected between the positive power supply input end of the operational amplifier U2 and the ground, the capacitor C4 is electrically connected between the inverting input end and the output end of the operational amplifier, the inverting input end of the operational amplifier U2 is electrically connected with the cathode of the diode D1 through the resistor R12, the anode of the diode D1 is electrically connected with the output end of the operational amplifier U2, and the output end of the operational amplifier U2 is electrically connected with the input end of the shaping circuit and the input end of the charge-discharge detection circuit respectively.
7. The battery current detection circuit for communication according to claim 6, 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.
8. The battery current detection circuit for communication according to claim 6, 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 connected with the base electrode of the triode Q1 through a resistor R9, the base electrode of the triode Q1 is connected with an external power supply through a resistor R10, the emitter electrode of the triode Q1 is grounded, the collector electrode of the triode Q1 is connected with the external power supply through a resistor R11, and the collector 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 |
|---|---|---|---|
| CN201921156043.3U CN210514565U (en) | 2019-07-23 | 2019-07-23 | Battery current detection circuit for communication |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921156043.3U CN210514565U (en) | 2019-07-23 | 2019-07-23 | Battery current detection circuit for communication |
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| CN210514565U true CN210514565U (en) | 2020-05-12 |
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| CN201921156043.3U Active CN210514565U (en) | 2019-07-23 | 2019-07-23 | Battery current detection circuit for communication |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346731A (en) * | 2019-07-23 | 2019-10-18 | 武汉洲际电讯科技股份有限公司 | Battery current detection circuit is used in a kind of communication |
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2019
- 2019-07-23 CN CN201921156043.3U patent/CN210514565U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110346731A (en) * | 2019-07-23 | 2019-10-18 | 武汉洲际电讯科技股份有限公司 | Battery current detection circuit is used in a kind of communication |
| CN110346731B (en) * | 2019-07-23 | 2024-04-26 | 武汉洲际电讯科技股份有限公司 | Battery current detection circuit for communication |
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