CN111426958A - Electric quantity display circuit - Google Patents

Electric quantity display circuit Download PDF

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Publication number
CN111426958A
CN111426958A CN202010296021.8A CN202010296021A CN111426958A CN 111426958 A CN111426958 A CN 111426958A CN 202010296021 A CN202010296021 A CN 202010296021A CN 111426958 A CN111426958 A CN 111426958A
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CN
China
Prior art keywords
circuit
sub
voltage
display
resistor
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CN202010296021.8A
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Chinese (zh)
Inventor
何岳明
文福宝
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Ningbo Tianhong Electronics Co ltd
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Ningbo Tianhong Electronics Co ltd
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Priority to CN202010296021.8A priority Critical patent/CN111426958A/en
Publication of CN111426958A publication Critical patent/CN111426958A/en
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    • 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]
    • G01R31/371—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC] with remote indication, e.g. on external chargers
    • 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
    • G01R31/387—Determining ampere-hour charge capacity or SoC
    • G01R31/388—Determining ampere-hour charge capacity or SoC involving voltage measurements

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)
  • Tests Of Electric Status Of Batteries (AREA)

Abstract

The invention discloses an electric quantity display circuit. The problem of power display circuit commonly used can not accurate demonstration battery power to and power display circuit commonly used needs a plurality of pins to support after integrated inside the chip, increase cost, practical value is low is solved. The electric quantity display circuit comprises a battery pack, a voltage-current conversion unit and an electric quantity display unit; the voltage and current conversion unit comprises a plurality of comparators corresponding to the electric quantity display stage, a plurality of trigger signal sub-circuits and reference sub-circuits for providing different reference voltages for the comparators, and the electric quantity display unit comprises a plurality of display sub-circuits corresponding to the electric quantity display stage and voltage division sub-circuits for providing different control voltages for the display sub-circuits. The invention can accurately and dynamically display the electric quantity of the battery, only one pin is required to support after the battery is integrated into the chip, the manufacturing cost of the integrated chip is reduced, and the actual use value is improved.

Description

Electric quantity display circuit
Technical Field
The invention relates to the technical field of batteries, in particular to an electric quantity display circuit.
Background
The lithium battery needs to display the electric quantity of the battery in daily use. A common electric quantity display circuit is shown in fig. 1, and comprises a plurality of circuits formed by connecting resistors, voltage-regulator tubes and indicator lamps in series and connected to two ends of a battery, wherein when the voltage of the battery rises, the voltage-regulator tubes are broken down, and the indicator lamps are lightened. Different battery electric quantity display values can be obtained by selecting the proper voltage stabilizing value of the voltage stabilizing tube. However, the circuit has the disadvantages that the electric quantity display value is limited by the voltage regulator tube, the battery electric quantity is difficult to accurately display, particularly, dynamic display such as flashing of an indicator lamp is needed during charging, and the circuit display circuit cannot achieve the purpose. When the lithium battery is used, the lithium battery can be provided with a protection chip, if the electric quantity display circuit is integrated in the chip, the defects are easily solved, but another problem is generated, a plurality of indicating lamps need to be provided with a plurality of pins for support, and the pin resources of the integrated circuit are the primary consideration problem in chip design because the number of the pins of the chip is directly related to the cost of the chip and the actual value in use.
Disclosure of Invention
The invention mainly solves the problems that the common electric quantity display circuit can not accurately display the electric quantity of a battery, and the common electric quantity display circuit needs a plurality of pins for supporting after being integrated into a chip, so that the cost is increased, and the actual value is low, and provides the electric quantity display circuit.
The technical problem of the invention is mainly solved by the following technical scheme: a kind of electric quantity display circuit, including assembled battery, voltage current switching unit and electric quantity display element;
The voltage and current conversion unit comprises a plurality of comparators corresponding to the electric quantity display stage, a plurality of trigger signal sub-circuits and reference sub-circuits for providing different reference voltages for the comparators,
The positive input ends of the comparators are respectively connected with the positive electrode end of the battery pack, the negative input ends of the comparators are respectively connected with the corresponding voltage division points of the reference sub-circuit,
Each trigger signal sub-circuit is connected in parallel, one end of the connected circuit is connected with a power supply, the other end of the connected circuit is used as a signal output end of the voltage-current conversion unit, each trigger signal sub-circuit comprises a first control switch for controlling the work of the trigger signal sub-circuit, and the output end of each comparator is respectively connected to the control end of the corresponding first control switch;
The electric quantity display unit comprises a plurality of display sub-circuits corresponding to the electric quantity display stage and a voltage division sub-circuit for providing different control voltages for each display sub-circuit,
Each display sub-circuit comprises a second control switch for controlling the work of the display sub-circuit, the second control switches are respectively connected to the corresponding voltage division points of the voltage division sub-circuit, and the signal output end of the voltage-current conversion unit is connected with the input end of the voltage division sub-circuit.
The invention outputs a control signal to the circuit display unit when reaching the set charging electric quantity stage by detecting the voltage of the battery pack during charging, and controls the corresponding display sub-circuit to work to turn on the indicator lamp. Every time the battery pack is charged to one stage, the corresponding indicating lamp is lightened, so that the electric quantity of the battery pack can be accurately displayed. The circuit is designed into two parts of a corresponding voltage and current conversion unit and an electric quantity display unit, the voltage and current conversion unit realizes the flash control of the circuit display unit through one signal output end, the voltage and current conversion unit is conveniently integrated into an integrated chip, only one pin is needed after the integration because only one signal output end is provided, the manufacturing cost of the integrated chip is reduced, and the use value is improved.
The reference sub-circuit in the scheme is provided with a plurality of voltage division points and can provide different reference voltages, the reverse input ends of the comparators are respectively connected to the corresponding voltage division points to obtain corresponding reference voltages, the comparators control the corresponding trigger signal sub-circuits to conduct and work by comparing with the charging voltage of the battery, and control signals are formed and sent to the electric quantity display unit. The electric quantity display unit comprises a plurality of display sub-circuits corresponding to electric quantity display stages and voltage division sub-circuits, each voltage division sub-circuit is provided with a plurality of voltage division points and provides control voltage for corresponding to the second control switches, the control signals pass through the voltage division sub-circuits and then carry out on-off control on the second control switches, each time the battery pack is charged to one stage, the corresponding second control switches are controlled by the control signals to be conducted, then the corresponding display sub-circuits work, and the corresponding indicator lamps are turned on.
Preferably, the comparator includes a corresponding number of comparators BG1 … BGn according to the set electric quantity display period.
Preferably, the reference sub-circuit comprises a reference voltage source E0, a resistor RE1 … REn corresponding to the electricity display level, the resistor RE1 … REn is connected in series, the circuit is connected to both ends of the reference voltage source E0 after the series connection, the negative pole of the reference voltage source E0 is connected to the negative pole of the battery pack, the inverting input terminal of the comparator BGk is connected to one end of the resistor REk connected to the positive pole of the reference voltage source E0, wherein k =1 … n.
In the scheme, the reference sub-circuit provides reference voltage for each comparator, the resistors RE1 … REN are connected in series, two ends of the circuit after the series connection are respectively connected with two ends of a reference voltage source, and endpoints of the resistors form voltage division points. The resistor RE1 and the resistor REN serve as two-end resistors of the circuit after series connection, one end of the resistor RE1 is connected with the anode of a reference voltage source, the other end of the resistor RE1 is connected with one end of the resistor RE2, one end of the resistor REN is connected with the cathode of the reference voltage source, and the other end of the resistor REN is connected with one end of the resistor REN-1. The resistor REk is connected to the positive terminal of the reference voltage source E0, i.e. the resistor REk is directly connected to the positive terminal of the reference voltage source E0 or connected to the positive terminal of the reference voltage source E0 through a series resistor.
Preferably, the trigger signal sub-circuit includes a MOS transistor Qk and a resistor RHk, where k =1 … n, the first control switch is the MOS transistor Qk, one end of the resistor RHk is connected to the power supply, the other end of the resistor RHk is connected to the source of the MOS transistor Qk, the drain of the MOS transistor Qk is connected to the signal output terminal of the voltage-current conversion unit, and the gate of the MOS transistor Qk is connected to the output terminal of the comparator BGk. According to the scheme, the MOS tube is used as a first control switch to control the on-off of the trigger signal sub-circuit, and when the battery pack is charged to one stage, the corresponding comparator sends a signal to the corresponding first control switch, so that the corresponding trigger signal sub-circuit is switched on, and a control signal is sent to the electric quantity display unit.
As a preferable scheme, the trigger signal sub-circuit includes a MOS transistor Qk and a constant current source IDk, where k =1 … n, the first control switch is the MOS transistor Qk, the positive electrode of the constant current source IDk is connected to the power supply, the negative electrode of the constant current source IDk is connected to the source electrode of the MOS transistor Qk, the drain electrode of the MOS transistor Qk is connected to the signal output end of the voltage-current conversion unit, and the gate electrode of the MOS transistor Qk is connected to the output end of the comparator BGk. According to the scheme, the voltage is connected to the MOS tube after passing through the constant current source to provide constant current, the MOS tube is used as the first control switch to control the on-off of the trigger signal sub-circuit, and when the battery pack is charged to one stage, the corresponding comparator sends a signal to the corresponding first control switch, so that the corresponding trigger signal sub-circuit is switched on, and a control signal is sent to the electric quantity display unit.
Preferably, the voltage divider sub-circuit comprises a resistor RF1 … RFn corresponding to the power display stage, the resistor RF1 … RFn is connected in series, one end of the series circuit is used as the input end of the power display circuit and is connected with the signal output end of the voltage-current conversion circuit, and the other end of the series circuit is grounded. According to the scheme, the number of the resistors of the voltage division circuit is set according to the electric quantity display stage, the resistors are connected in series, and the end points of the resistors form voltage division points. Specifically, a resistor RF1 … RFn is connected in series to form a series circuit, wherein the resistor RF1 and the resistor RFn are resistors at two ends of the series circuit, one end of a resistor RF1 is connected with a signal output end of the voltage-current conversion circuit, the other end of the resistor RF1 is connected with one end of a resistor RF2, one end of the resistor RFn is grounded, and the other end of the resistor RFn is connected with a resistor RFn-1.
the display sub-circuit comprises a resistor R L k, a light emitting diode L EDk and an MOS tube Gk, wherein k =1 … n, the second control switch is the MOS tube Gk, one end of the resistor R L k is connected with a power supply, the other end of the resistor R L k is connected with the anode of the light emitting diode L EDk, the cathode of the light emitting diode L EDk is connected with the drain of the MOS tube Gk, the source of the MOS tube Gk is grounded, the grid of the MOS tube Gk is connected with one end of the resistor RFk connected with the input end of the circuit display circuit.
Preferably, the current display unit further includes an oscillator H, and the oscillator H is connected to the signal output terminal of the voltage-current conversion unit. Each trigger signal sub-circuit is reconnected to signal output part through connecting the oscillator after the parallel connection in this scheme, and signal output part is connected with electric quantity display element, can flash through the pilot lamp of the effect circuit display element of oscillator for can the dynamic display electric quantity when the group battery charges.
Preferably, the display sub-circuit further includes an oscillator Hk, where k =1 … n, one end of the oscillator Hk is connected to the drain terminal of the MOS transistor Qk, and the other end of the oscillator Hk is connected to the signal output terminal of the voltage-to-current conversion unit. This scheme all connects the oscillator on each trigger signal sub-circuit, switches on the back at trigger signal sub-circuit, and the signal conveys to signal output part through the oscillator, and signal output part is connected with electric quantity display element, and the pilot lamp through the effect circuit display element of oscillator can flash for can dynamic display electric quantity when the group battery charges.
Preferably, the voltage-current conversion circuit is integrated in an integrated chip, and the signal output end of the voltage-current conversion circuit forms one pin of the integrated chip. According to the scheme, the voltage-current conversion circuit is integrated in the integrated chip, and only one pin is needed for signal output, so that the cost is reduced.
Therefore, the invention has the advantages that:
1. The voltage is compared and detected when the comparator is adopted to charge the battery, and the corresponding indicator lamp is controlled to be lightened when the set voltage is reached, so that the electric quantity of the battery can be accurately displayed.
2. The indicator light can flash through the action of the oscillator, so that the circuit can be dynamically displayed when the battery pack is charged.
3. The voltage-current conversion circuit only has one signal output end and only needs to provide one pin for supporting after being integrated into the chip, so that the manufacturing cost of the integrated chip is reduced, and the practical use value is improved.
Drawings
FIG. 1 is a schematic diagram of a circuit structure of a conventional power display circuit in the prior art;
FIG. 2 is a schematic diagram of a circuit configuration according to the present invention;
Fig. 3 is a schematic diagram of a second circuit structure according to the present invention.
1-voltage current conversion unit 2-electric quantity display unit 3-trigger signal sub-circuit 4-reference sub-circuit 5-display sub-circuit 6-voltage divider sub-circuit 7-comparator.
Detailed Description
The technical scheme of the invention is further specifically described by the following embodiments and the accompanying drawings.
Example 1:
A power display circuit of the present embodiment, as shown in fig. 2, includes a battery B, a voltage-current conversion unit 1 and a power display unit 2. The battery pack is formed by connecting a plurality of batteries B1 … Bn in series, and when the battery pack is charged, the positive pole of the battery pack is connected with a power supply, and the negative pole of the battery pack is grounded. The voltage-current conversion unit 1 comprises a plurality of comparators 7 corresponding to the electric quantity display stage, a plurality of trigger signal sub-circuits 3 and a reference sub-circuit 4 for providing different reference voltages for the comparators. The positive input ends of the comparators are respectively connected to the positive electrode of the battery pack B, and the negative input ends of the comparators are respectively connected to corresponding voltage division points on the reference sub-circuit. And the trigger signal sub-circuits are connected in parallel, one end of the connected circuit is connected with a power supply, the other end of the connected circuit is connected with one end of an oscillator, and the other end of the oscillator is used as a signal output end of the voltage-current conversion unit. Each trigger signal sub-circuit comprises a first control switch for controlling the work of the trigger signal sub-circuit, and the output end of each comparator is respectively connected to the control end of the corresponding first control switch. The electric quantity display unit 2 comprises a plurality of display sub-circuits 5 corresponding to the electric quantity display stage and voltage division sub-circuits 6 providing different control voltages for the display sub-circuits, each display sub-circuit comprises a second control switch controlling the work of the display sub-circuit, the second control switches are respectively connected to corresponding voltage division points on the voltage division sub-circuits, and the signal output end of the voltage-current conversion unit is connected with the input end of the voltage division sub-circuits. In addition, the voltage and current conversion unit is integrated in the integrated chip, the voltage and current conversion unit adopts a signal output end, and only one pin is required to support after integration, so that the voltage and current conversion unit is connected to the electric quantity display unit.
As a specific structure of the circuit display circuit, the circuit display circuit divides the battery charging capacity into n stages for displaying, the voltage-current conversion unit has n comparators 7, n trigger signal sub-circuits 3 corresponding to the comparators, and n display sub-circuits corresponding to the capacity display unit.
As shown in fig. 2, the comparator includes a comparator BG1 … BGn including a positive input terminal, a negative input terminal, and an output terminal.
The reference sub-circuit comprises a reference voltage source E0 and a resistor RE1 … REN corresponding to the electric quantity display grade, wherein the resistor RE1 … REN is connected in series, the circuit is connected to two ends of the reference voltage source E0 after the circuit is connected in series, specifically, the resistor RE1 and the resistor REN are resistors at two ends of the circuit after the circuit is connected in series, one end of the resistor RE1 serves as an input end of the circuit after the circuit is connected in series and is connected with the anode of the reference voltage source, and one end of the resistor REN serves as an output end of the circuit after. The negative electrode of the reference voltage source E0 is connected with the negative electrode end of the battery pack, the inverting input end of the comparator BGk is connected with one end of the resistor REk connected with the positive electrode of the reference voltage source E0, wherein k =1 … n, as shown in FIG. 2, the inverting input end of the comparator BG1 is connected with the connection point between the resistor RE1 and the resistor RE2, the inverting input end of other comparators is connected between the corresponding two resistors in the same way, and the inverting input end of the comparator BGn is connected with the connection point between the resistor REN and the positive electrode of the reference voltage source E0.
The trigger signal sub-circuit comprises a MOS transistor Qk and a resistor RHk, wherein k =1 … n, and the first control switch is the MOS transistor Qk. One end of the resistor RHk is connected to the power supply, the other end of the resistor RHk is connected to the source of the MOS transistor Qk, the drain of the MOS transistor Qk is connected to one end of the oscillator, the other end of the oscillator is connected to the signal output end of the voltage-current conversion unit, and the gate of the MOS transistor Qk is connected to the output end of the comparator BGk. In addition, the resistor RHk in the trigger signal sub-circuit may be replaced with a constant current source IDn.
The voltage dividing sub-circuit comprises a resistor RF1 … RFn corresponding to the electricity quantity display stage, a resistor RF1 … RFn is connected in series, and a point between the two resistors forms a voltage dividing point. One end of the circuit after series connection is used as the input end of the circuit display circuit and is connected with the signal output end of the voltage-current conversion circuit, and the other end of the circuit after series connection is grounded. Specifically, the resistor RF1 and the resistor RFn are resistors at two ends of a series circuit, one end of the resistor RF1 forms an input end of the series circuit, and one end of the resistor RFn forms a ground.
the display sub-circuit comprises a resistor R L k, a light emitting diode L EDk and a MOS tube Gk, wherein k =1 … n, the second control switch is the MOS tube Gk, one end of the resistor R L k is connected with a power supply, the other end of the resistor R L k is connected with the anode of the light emitting diode L EDk, the cathode of the light emitting diode L EDk is connected with the drain of the MOS tube Gk, the source of the MOS tube Gk is grounded, the gate of the MOS tube Gk is connected with one end of the resistor RFk connected with the input end of the circuit display circuit, specifically, as shown in FIG. 2, the gate of the MOS tube G1 is connected with the connection point between the resistor RF1 and the input end of the current display unit, the gate of the MOS tube G2 is connected with the connection point (not shown in the figure) between the resistor RF1 and the resistor RF2, and the analogy of the connection structure is that the.
when the battery pack is charged, the voltage of the positive electrode of the battery pack rises, when the voltage of the positive input end of the comparator BG1 reaches the voltage value of the reverse input end, the output end of the comparator BG1 outputs a high level to the MOS tube Q1, the MOS tube Q1 is conducted, the signal trigger sub-circuit where the MOS tube Q1 is located is conducted, a control signal output by the signal trigger sub-circuit enters the electric quantity display unit through the oscillator, the control signal reaches the grid electrode of the MOS tube Gn through the voltage division sub-circuit in the circuit display unit, the grid electrode voltage of the MOS tube G1 reaches the starting voltage, the MOS tube G1 is conducted, the display sub-circuit where the MOS tube G1 is located is conducted, the light emitting diode L ED1 flashes, the current electric quantity of the rechargeable battery is dynamically displayed, when the voltage of the positive electrode of the battery pack continues to rise, then the voltage of the positive input end of the comparator BG2 reaches the reverse input voltage value, the corresponding steps are carried out until the light emitting diode L ED2 flashes, and.
Example 2:
The present embodiment provides a second power display circuit, as shown in fig. 3, the difference from embodiment 1 lies in that the original oscillator H is eliminated in the voltage-current conversion unit, the trigger signal sub-circuit includes a MOS transistor Qk, a constant current source IDk, and an oscillator Hk, where k =1 … n, the positive electrode of the constant current source IDk is connected to the power supply, the negative electrode of the constant current source IDk is connected to the source electrode of the MOS transistor Qk, the drain electrode of the MOS transistor Qk is connected to the input terminal of the oscillator H, the output terminal of the oscillator Hk is connected to the signal output terminal of the voltage-current conversion unit, the gate electrode of the MOS transistor Qk is connected to the output terminal of the comparator BGk, and the constant. Therefore, an oscillator is added in each trigger signal sub-circuit, when the trigger signal sub-circuits are switched on, the control signals are directly adjusted and output to the signal output end of the voltage-current conversion unit through the oscillators, the same trigger signal sub-circuits are connected in parallel and then connected to the signal output end of the voltage-current conversion unit, and only one signal output end is arranged. The other structure in embodiment 2 is the same as that in embodiment 1.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Although terms such as voltage-to-current conversion unit, power display unit, trigger signal sub-circuit, reference sub-circuit, etc. are used more often herein, the possibility of using other terms is not excluded. These terms are used merely to more conveniently describe and explain the nature of the present invention; they are to be construed as being without limitation to any additional limitations that may be imposed by the spirit of the present invention.

Claims (10)

1. An electric quantity display circuit, characterized in that: the device comprises a battery pack, a voltage-current conversion unit and an electric quantity display unit;
The voltage and current conversion unit comprises a plurality of comparators corresponding to the electric quantity display stage, a plurality of trigger signal sub-circuits and reference sub-circuits for providing different reference voltages for the comparators,
The positive input ends of the comparators are respectively connected with the positive electrode end of the battery pack, the negative input ends of the comparators are respectively connected with the corresponding voltage division points of the reference sub-circuit,
Each trigger signal sub-circuit is connected in parallel, one end of the connected circuit is connected with a power supply, the other end of the connected circuit is used as a signal output end of the voltage-current conversion unit, each trigger signal sub-circuit comprises a first control switch for controlling the work of the trigger signal sub-circuit, and the output end of each comparator is respectively connected to the control end of the corresponding first control switch;
The electric quantity display unit comprises a plurality of display sub-circuits corresponding to the electric quantity display stage and a voltage division sub-circuit for providing different control voltages for each display sub-circuit,
Each display sub-circuit comprises a second control switch for controlling the work of the display sub-circuit, each second control switch is respectively connected to a corresponding voltage division point of the voltage division sub-circuit, and the signal output end of the voltage-current conversion unit is connected with the input end of the voltage division sub-circuit.
2. The circuit of claim 1, wherein the comparator comprises a corresponding number of comparators BG1 … BGn according to the set power display period.
3. The circuit of claim 2, wherein the reference sub-circuit comprises a reference voltage source E0, a resistor RE1 … REn corresponding to the power display level, the resistor RE1 … REn being connected in series, the series circuit being connected across the reference voltage source E0, the negative terminal of the reference voltage source E0 being connected to the negative terminal of the battery, the inverting input terminal of the comparator BGk being connected to the terminal of the resistor REk connected to the positive terminal of the reference voltage source E0, wherein k =1 … n.
4. The circuit of claim 2 or 3, wherein the trigger signal sub-circuit comprises a MOS transistor Qk and a resistor RHk, wherein k =1 … n, the first control switch is the MOS transistor Qk, one end of the resistor RHk is connected to the power supply, the other end of the resistor RHk is connected to the source of the MOS transistor Qk, the drain of the MOS transistor Qk is connected to the signal output terminal of the voltage-current converting unit, and the gate of the MOS transistor Qk is connected to the output terminal of the comparator BGk.
5. The power consumption display circuit of claim 2 or 3, wherein the trigger signal sub-circuit comprises a MOS transistor Qk and a constant current source IDk, wherein k =1 … n, the first control switch is the MOS transistor Qk, the positive pole of the constant current source IDk is connected to the power supply, the negative pole of the constant current source IDk is connected to the source of the MOS transistor Qk, the drain of the MOS transistor Qk is connected to the signal output terminal of the voltage-current conversion unit, and the gate of the MOS transistor Qk is connected to the output terminal of the comparator BGk.
6. A power display circuit according to claim 1, 2 or 3, wherein the voltage divider sub-circuit comprises a resistor RF1 … RFn corresponding to the power display stage, the resistor RF1 … RFn is connected in series, one end of the series circuit is used as the input terminal of the power display circuit and is connected to the signal output terminal of the voltage-current converter circuit, and the other end of the series circuit is grounded.
7. the power display circuit of claim 6, wherein the display sub-circuit comprises a resistor R L k, a light emitting diode L EDk, and a MOS transistor Gk, wherein k =1 … n, the second control switch is a MOS transistor Gk, one end of the resistor R L k is connected to the power supply, the other end of the resistor R L k is connected to the anode of the light emitting diode L EDk, the cathode of the light emitting diode L EDk is connected to the drain of the MOS transistor Gk, the source of the MOS transistor Gk is grounded, and the gate of the MOS transistor Gk is connected to the end of the resistor RFk connected to the input terminal of the circuit display circuit.
8. The circuit of claim 4, wherein the power display unit further comprises an oscillator H, and the oscillator H is connected to the signal output terminal of the voltage-current conversion unit.
9. The power consumption display circuit of claim 5, wherein the display sub-circuit further comprises an oscillator Hk, wherein k =1 … n, one end of the oscillator Hk is connected to the drain terminal of the MOS transistor Qk, and the other end of the oscillator Hk is connected to the signal output terminal of the voltage-to-current conversion unit.
10. The circuit of claim 1, 2 or 3, wherein the voltage-to-current converter circuit is integrated into an ic, and the signal output terminal of the voltage-to-current converter circuit forms a pin of the ic.
CN202010296021.8A 2020-04-15 2020-04-15 Electric quantity display circuit Pending CN111426958A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010296021.8A CN111426958A (en) 2020-04-15 2020-04-15 Electric quantity display circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010296021.8A CN111426958A (en) 2020-04-15 2020-04-15 Electric quantity display circuit

Publications (1)

Publication Number Publication Date
CN111426958A true CN111426958A (en) 2020-07-17

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202010296021.8A Pending CN111426958A (en) 2020-04-15 2020-04-15 Electric quantity display circuit

Country Status (1)

Country Link
CN (1) CN111426958A (en)

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