Voltage regulating circuit based on direct current system and electronic equipment

Abstract

The invention relates to the technical field of voltage regulation circuits, and discloses a voltage regulation circuit based on a direct current system and electronic equipment. The circuit comprises a current sampling module, a current reference module and a control module, the current sampling module is electrically connected with the control module and is used for detecting the charging current in real time, acquiring a sampling current value and outputting a current detection signal corresponding to the sampling current value to the control module according to the sampling current value; the current reference module is electrically connected with the control module and is used for setting a corresponding reference voltage value according to the preset segmented current and outputting a reference voltage signal corresponding to the reference voltage value to the control module; and the control module is used for performing segmented control on the sampling current value according to the current detection signal and the reference voltage signal, acquiring a voltage control signal corresponding to the sampling current value, and controlling the voltage output of the direct current system according to the voltage control signal. The problem that the voltage of the direct current system is too high or unstable is solved, and the use safety of the storage battery is improved.

Description

Technical Field

[0001] This application relates to the technical field of voltage regulating circuits, and particularly to a voltage regulating circuit and an electronic device based on a DC system. Background Art

[0002] In recent years, with the modernization and upgrade of the national defense system, the power supply system of weapons and equipment has gradually transformed from the traditional AC system to the DC system, and the AC power supply system has correspondingly transitioned to the DC power supply system. The DC power supply system usually uses a battery pack as the core component, and the DC system charges the battery pack. However, if the battery power is severely insufficient, the charging current may be too large during charging, resulting in too high or unstable voltage of the DC system, which may damage the battery and affect the normal operation of the electrical equipment. Summary of the Invention

[0003] In a first aspect, the present invention provides a voltage regulating circuit based on a DC system, and the circuit includes: a current sampling module, a current reference module, and a control module;

[0004] The current sampling module is electrically connected to the control module, and is used for real-time detection of the charging current of the battery, obtaining a sampled current value, and outputting a current detection signal corresponding to the sampled current value to the control module according to the sampled current value;

[0005] The current reference module is electrically connected to the control module, and is used for setting a corresponding reference voltage value according to a preset segmented current, and outputting a reference voltage signal corresponding to the reference voltage value to the control module;

[0006] The control module is used for segmentally controlling the sampled current value according to the current detection signal and the reference voltage signal, obtaining a voltage control signal corresponding to the sampled current value, and controlling the voltage output of the DC system according to the voltage control signal.

[0007] In an optional embodiment, the current sampling module includes: a first filtering sub-module, a second filtering sub-module, and a differential amplification sub-module;

[0008] The differential amplification sub-module is electrically connected to the first filtering sub-module and the second filtering sub-module respectively;

[0009] The second filtering sub-module is electrically connected to the control module.

[0010] In an optional embodiment, the first filtering sub-module includes: a first magnetic bead, a second magnetic bead, a filter, a first filtering capacitor, a second filtering capacitor, a first filtering resistor, a second filtering resistor, a third filtering resistor, and a fourth filtering resistor;

[0011] The first end of the first magnetic bead is electrically connected to the negative electrode of the charging terminal, and the second end of the first magnetic bead is electrically connected to the first end of the first filter capacitor;

[0012] The first end of the second magnetic bead is electrically connected to the positive electrode of the charging terminal, and the second end of the second magnetic bead is electrically connected to the second end of the first filter capacitor;

[0013] The first end of the filter is electrically connected to the first end of the first filter capacitor and the second end of the first filter capacitor respectively;

[0014] The second end of the filter is electrically connected to the first end of the second filter capacitor and the second end of the second filter capacitor respectively;

[0015] The first end of the second filter capacitor is further electrically connected to the second end of the first filter resistor, the first end of the third filter resistor, and the differential amplification sub-module respectively;

[0016] The second end of the second filter capacitor is further electrically connected to the second end of the second filter resistor, the first end of the fourth filter resistor, and the differential amplification sub-module respectively;

[0017] The first end of the first filter resistor is further electrically connected to the first end of the second filter resistor;

[0018] The second end of the third filter resistor is further electrically connected to the second end of the fourth filter resistor;

[0019] The second end of the second filter resistor is electrically connected to the first end of the fourth filter resistor.

[0020] In an alternative embodiment, the differential amplification sub-module includes: a first amplification resistor, a second amplification resistor, a third amplification resistor, a fourth amplification resistor, a first amplification capacitor, a second amplification capacitor, and a first operational amplifier;

[0021] The first end of the first amplification resistor is electrically connected to the first end of the second filter capacitor;

[0022] The second end of the first amplification resistor is electrically connected to the inverting input terminal of the first operational amplifier and the first end of the fourth amplification resistor respectively;

[0023] The first end of the second amplification resistor is electrically connected to the second end of the second filter capacitor;

[0024] The second end of the second amplification resistor is electrically connected to the non-inverting input terminal of the first operational amplifier, the first end of the third amplification resistor, and the first end of the first amplification capacitor respectively;

[0025] The first end of the third amplification resistor is electrically connected to the first end of the first amplification capacitor;

[0026] The second end of the third amplification resistor is electrically connected to the second end of the first amplification capacitor;

[0027] The first end of the fourth amplification resistor is also electrically connected to the first end of the second amplification capacitor;

[0028] The second end of the fourth amplification resistor is also electrically connected to the second end of the second amplification capacitor, the output end of the first operational amplifier, and the second filtering sub-module respectively;

[0029] The output end of the first operational amplifier is also electrically connected to the second filtering sub-module.

[0030] In an alternative embodiment, the second filtering sub-module includes: a fifth filtering resistor, a sixth filtering resistor, a seventh filtering resistor, a third filtering capacitor, a fourth filtering capacitor, a fifth filtering capacitor, and a second operational amplifier;

[0031] The first end of the fifth filtering resistor is electrically connected to the second end of the fourth amplification resistor and the output end of the first operational amplifier respectively;

[0032] The second end of the fifth filtering resistor is electrically connected to the first end of the third filtering capacitor and the first end of the sixth filtering resistor respectively;

[0033] The second end of the third filtering capacitor is grounded;

[0034] The second end of the sixth filtering resistor is electrically connected to the first end of the seventh filtering resistor and the first end of the fourth filtering capacitor respectively;

[0035] The second end of the fourth filtering capacitor is electrically connected to the inverting input end and the output end of the second operational amplifier respectively;

[0036] The second end of the seventh filtering resistor is electrically connected to the first end of the fifth filtering capacitor and the non-inverting input end of the second operational amplifier respectively;

[0037] The second end of the fifth filtering capacitor is grounded;

[0038] The output end of the second operational amplifier is electrically connected to the current reference module.

[0039] In an alternative embodiment, the current reference module includes: a voltage regulation sub-module and a segmentation sub-module;

[0040] The voltage regulation sub-module is electrically connected to the segmentation sub-module;

[0041] The segmented sub-module is also electrically connected to the control module.

[0042] In an alternative embodiment, the voltage stabilizing sub-module includes: a first voltage stabilizing resistor, a second voltage stabilizing resistor, a third voltage stabilizing resistor, a first voltage stabilizing capacitor, a second voltage stabilizing capacitor, and a voltage reference chip;

[0043] The first end of the first voltage stabilizing resistor is electrically connected to the power supply and the first end of the first voltage stabilizing capacitor respectively;

[0044] The second end of the first voltage stabilizing resistor is electrically connected to the first end of the second voltage stabilizing resistor and the voltage reference chip respectively;

[0045] The second end of the second voltage stabilizing resistor is electrically connected to the first end of the third voltage stabilizing resistor and the voltage reference chip respectively;

[0046] The second end of the third voltage stabilizing resistor is electrically connected to the second end of the first voltage stabilizing capacitor and the voltage reference chip respectively;

[0047] The first end of the second voltage stabilizing capacitor is electrically connected to the voltage reference chip and the segmented sub-module respectively;

[0048] The second end of the second voltage stabilizing capacitor is electrically connected to the voltage reference chip and the segmented sub-module respectively;

[0049] The segmented sub-module includes: a first segmented resistor, a second segmented resistor, a segmented capacitor, and a first potentiometer;

[0050] The first end of the first segmented resistor is electrically connected to the first end of the second voltage stabilizing capacitor;

[0051] The second end of the first segmented resistor is electrically connected to the first end of the first potentiometer;

[0052] The second end of the first potentiometer is electrically connected to the second end of the second segmented resistor and the first end of the segmented capacitor respectively;

[0053] The first end of the second segmented resistor is electrically connected to the second end of the segmented capacitor;

[0054] The first end of the segmented capacitor is also electrically connected to the control module;

[0055] The second end of the segmented capacitor is grounded.

[0056] In an alternative embodiment, the control module includes: a conversion sub-module and an adjustment sub-module;

[0057] The conversion sub-module is electrically connected to the current sampling module, the current reference module, and the adjustment sub-module respectively;

[0058] The adjustment sub-module is also electrically connected to the DC system.

[0059] In an optional embodiment, the conversion sub-module includes: a first conversion resistor, a second conversion resistor, a third conversion resistor, a fourth conversion resistor, a fifth conversion resistor, a first conversion capacitor, a second conversion capacitor, and a third operational amplifier;

[0060] The first end of the first conversion resistor is electrically connected to the current sampling module;

[0061] The second end of the first conversion resistor is electrically connected to the inverting input terminal of the third operational amplifier, the first end of the third conversion resistor, and the first end of the second conversion capacitor;

[0062] The first end of the second conversion resistor is electrically connected to the current reference module;

[0063] The second end of the second conversion resistor is electrically connected to the first end of the fourth conversion resistor, the first end of the first conversion capacitor, and the non-inverting input terminal of the third operational amplifier;

[0064] The second end of the second conversion capacitor is electrically connected to the second end of the third conversion resistor and the first end of the fifth conversion resistor;

[0065] The second end of the fifth conversion resistor is electrically connected to the adjustment sub-module;

[0066] The second end of the fourth conversion resistor is electrically connected to the second end of the first conversion capacitor;

[0067] The adjustment sub-module includes: a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, an adjustment capacitor, a second potentiometer, and a fourth operational amplifier;

[0068] The first end of the second potentiometer is electrically connected to the second end of the fifth conversion resistor;

[0069] The second end of the second potentiometer is electrically connected to the non-inverting input terminal of the fourth operational amplifier, the first end of the first adjustment resistor, and the first end of the adjustment capacitor;

[0070] The second end of the first adjustment resistor is electrically connected to the second end of the adjustment capacitor;

[0071] The inverting input terminal of the fourth operational amplifier is electrically connected to the second end of the second adjustment resistor and the first end of the third adjustment resistor;

[0072] The first end of the second adjustment resistor is grounded;

[0073] The second terminal of the third adjustment resistor is electrically connected to the output terminal of the fourth operational amplifier and the first terminal of the fourth adjustment resistor respectively;

[0074] The second terminal of the fourth adjustment resistor is electrically connected to the DC system.

[0075] In a second aspect, the present invention provides an electronic device, including the voltage regulation circuit based on the DC system according to any one of the foregoing embodiments.

[0076] The embodiments of the present application have the following beneficial effects:

[0077] The voltage regulation circuit and the electronic device based on the DC system provided by the present application described above, the circuit includes: a current sampling module, a current reference module and a control module; the current sampling module, electrically connected to the control module, is used to detect the charging current of the battery in real time, obtain a sampled current value, and output a current detection signal corresponding to the sampled current value to the control module according to the sampled current value; the current reference module, electrically connected to the control module, is used to set a corresponding reference voltage value according to a preset segmented current, and output a reference voltage signal corresponding to the reference voltage value to the control module; the control module is used to perform segmented control on the sampled current value according to the current detection signal and the reference voltage signal, obtain a voltage control signal corresponding to the sampled current value, and control the voltage output of the DC system according to the voltage control signal. The present application solves the problem of too high or unstable voltage of the DC system by setting a current sampling module to monitor the sampled current value in real time, setting the reference voltage of the segmented current, and adjusting the voltage of the DC system according to the monitored sampled current value and the reference voltage, and improves the safety of the battery use. Description of the Drawings

[0078] In order to more clearly illustrate the technical solutions of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as limiting the protection scope of the present application. For those of ordinary skill in the art, other related drawings can be obtained according to these drawings without creative efforts.

[0079] Figure 1 Shows a schematic structural diagram of a voltage regulation circuit based on a DC system provided by an embodiment of the present application;

[0080] Figure 2 Shows another schematic structural diagram of a voltage regulation circuit based on a DC system provided by an embodiment of the present application;

[0081] Figure 3 Shows a schematic circuit diagram of a current sampling module provided by an embodiment of the present application;

[0082] Figure 4 shows a circuit schematic diagram of the current reference module provided by an embodiment of the present application;

[0083] Figure 5 shows a circuit schematic diagram of the control module provided by an embodiment of the present application.

[0084] Icons: 10 - Voltage regulation circuit based on DC system; 101 - Current sampling module; 102 - Control module; 103 - Current reference module; 1011 - First filtering sub-module; 1012 - Differential amplification sub-module; 1013 - Second filtering sub-module; 1031 - Voltage stabilization sub-module; 1032 - Segmentation sub-module; 1021 - Conversion sub-module; 1022 - Adjustment sub-module. Detailed implementation manners

[0085] Next, the technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments.

[0086] Generally, the components of the embodiments of the present application described and illustrated herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but merely represents selected embodiments of the present application. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of protection of the present application.

[0087] Hereinafter, the terms "including", "having" and their cognates that can be used in various embodiments of the present application are only intended to represent specific features, numbers, steps, operations, elements, components or combinations of the foregoing items, and should not be construed as first excluding the existence of one or more other features, numbers, steps, operations, elements, components or combinations of the foregoing items or increasing the possibility of one or more features, numbers, steps, operations, elements, components or combinations of the foregoing items.

[0088] In addition, the terms "first", "second", "third", etc. are only used for distinguishing descriptions and cannot be understood as indicating or implying relative importance.

[0089] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which various embodiments of the present application belong. The terms (such as those defined in a general use dictionary) will be interpreted as having the same meaning as the contextual meaning in the relevant technical field and will not be interpreted as having an idealized meaning or an overly formal meaning unless clearly defined in various embodiments of the present application.

[0090] The following will describe in detail some embodiments of the present application with reference to the accompanying drawings. Without conflict, the following embodiments and the features in the embodiments may be combined with each other.

[0091] Currently, the DC power supply system generally adopts the combination of a DC system and a battery pack. Its working mode is that the DC system first charges the battery pack, and after the battery pack is fully charged, it supplies power to the DC power consumption system. During use, the power of the battery pack gradually decreases. When the power decreases to a certain extent, the DC system is turned on again to charge the battery pack. However, the power supply mode of the DC system + battery pack has risks. When the power of the battery pack decreases severely, the charging current in the DC system is too large during the charging process, and the overshoot and imbalance of the voltage in the DC system cause the electrical equipment to not be able to use electricity normally. To solve the above problems, the present application proposes a voltage regulating circuit 10 based on the DC system.

[0092] Embodiment 1

[0093] As Figure 1 shown, the circuit includes: a current sampling module 101, a current reference module 103, and a control module 102; the circuit includes: a current sampling module 101, a current reference module 103, and a control module 102; the current sampling module 101 is electrically connected to the control module 102 and is used for detecting the charging current of the battery in real time, obtaining a sampled current value, and outputting a current detection signal corresponding to the sampled current value to the control module 102 according to the sampled current value; the current reference module 103 is electrically connected to the control module 102 and is used for setting a corresponding reference voltage value according to a preset segmented current and outputting a reference voltage signal corresponding to the reference voltage value to the control module 102; the control module 102 is used for performing segmented control on the sampled current value according to the current detection signal and the reference voltage signal, obtaining a voltage control signal corresponding to the sampled current value, and controlling the voltage output of the DC system according to the voltage control signal.

[0094] It should be noted that the current sampling module 101 is electrically connected to the storage battery, and detects the current change in real time during the charging process, providing an accurate current signal for the subsequent control circuit, so as to monitor and control the charging process. The current reference module 103 provides reference signals for different charging stages for the control circuit. When the sampled current enters a certain set range, the control circuit adjusts the charging strategy accordingly to achieve precise charging control. The control module 102 receives the reference voltage signal and the current detection signal, compares the reference voltage signal and the current detection signal. When the sampled current exceeds the set reference, it outputs a corresponding voltage control signal, and adjusts the charging strategy in real time according to the comparison result, such as adjusting the magnitude of the charging current, etc., to ensure the safe and efficient output of the storage battery.

[0095] In one embodiment, as Figure 2 shown, the current sampling module 101 includes: a first filtering sub-module 1011, a second filtering sub-module 1013, and a differential amplification sub-module 1012; the differential amplification sub-module 1012 is electrically connected to the first filtering sub-module 1011 and the second filtering sub-module 1013 respectively; the second filtering sub-module 1013 is electrically connected to the control module 102.

[0096] It should be noted that the charging current of the storage battery is converted into a millivolt voltage signal by a shunt meter and input into the first filtering sub-module 1011. The first filtering sub-module 1011 filters out high-order harmonic voltages or noise voltages to obtain a clean voltage signal, and inputs the clean voltage signal into the differential amplification sub-module 1012. The differential amplification sub-module 1012 amplifies the millivolt voltage signal to improve the measurement accuracy. Then, the voltage amplified signal is input into the second filtering sub-module 1013 to filter out high-frequency signals and output a current detection signal.

[0097] In one embodiment, as Figure 3As shown, the first filtering sub-module 1011 includes: a first bead L1, a second bead L2, a filter L3, a first filtering capacitor C1, a second filtering capacitor C2, a first filtering resistor R1, a second filtering resistor R2, a third filtering resistor R3, and a fourth filtering resistor R4; a first end of the first bead L1 is electrically connected to a negative electrode of a charging terminal, and a second end of the first bead L1 is electrically connected to a first end of the first filtering capacitor C1; a first end of the second bead L2 is electrically connected to a positive electrode of the charging terminal, and a second end of the second bead L2 is electrically connected to a second end of the first filtering capacitor C1; a first end of the filter L3 is electrically connected to the first end of the first filtering capacitor and the second end of the first filtering capacitor C1 respectively; a second end of the filter L3 is electrically connected to a first end of the second filtering capacitor C2 and a second end of the second filtering capacitor C2 respectively; the first end of the second filtering capacitor C2 is further electrically connected to a second end of the first filtering resistor R1, a first end of the third filtering resistor R3, and the differential amplification sub-module 1012 respectively; the second end of the second filtering capacitor C2 is further electrically connected to a second end of the second filtering resistor R2, a first end of the fourth filtering resistor R4, and the differential amplification sub-module 1012 respectively; a first end of the first filtering resistor R1 is further electrically connected to a first end of the second filtering resistor R2; a second end of the third filtering resistor R3 is further electrically connected to a second end of the fourth filtering resistor R4; a second end of the second filtering resistor R2 is electrically connected to a first end of the fourth filtering resistor R4.

[0098] In one embodiment, the differential amplification sub-module 1012 includes: a first amplification resistor R5, a second amplification resistor R6, a third amplification resistor R7, a fourth amplification resistor R8, a first amplification capacitor C3, a second amplification capacitor C4, and a first operational amplifier U1A; a first end of the first amplification resistor R5 is electrically connected to a first end of the second filtering capacitor C2; a second end of the first amplification resistor R5 is respectively electrically connected to an inverting input terminal of the first operational amplifier U1A and a first end of the fourth amplification resistor R8; a first end of the second amplification resistor R6 is electrically connected to a second end of the second filtering capacitor C2; a second end of the second amplification resistor R6 is respectively electrically connected to a non-inverting input terminal of the first operational amplifier U1A, a first end of the third amplification resistor R7, and a first end of the first amplification capacitor C3; the first end of the third amplification resistor R7 is electrically connected to the first end of the first amplification capacitor C3; a second end of the third amplification resistor R7 is electrically connected to a second end of the first amplification capacitor C3; the first end of the fourth amplification resistor R8 is further electrically connected to a first end of the second amplification capacitor C4; a second end of the fourth amplification resistor R8 is further respectively electrically connected to a second end of the second amplification capacitor C4, an output terminal of the first operational amplifier U1A, and the second filtering sub-module 1013; the output terminal of the first operational amplifier U1A is further electrically connected to the second filtering sub-module 1013.

[0099] In one embodiment, the second filtering sub-module 1013 includes: a fifth filtering resistor R9, a sixth filtering resistor R10, a seventh filtering resistor R11, a third filtering capacitor C5, a fourth filtering capacitor C6, a fifth filtering capacitor C7, and a second operational amplifier U1B; a first end of the fifth filtering resistor R9 is respectively electrically connected to a second end of the fourth amplification resistor R8 and an output terminal of the first operational amplifier U1A; a second end of the fifth filtering resistor R9 is respectively electrically connected to a first end of the third filtering capacitor C5 and a first end of the sixth filtering resistor R10; a second end of the third filtering capacitor C5 is grounded; a second end of the sixth filtering resistor R10 is respectively electrically connected to a first end of the seventh filtering resistor R11 and a first end of the fourth filtering capacitor C6; a second end of the fourth filtering capacitor C6 is respectively electrically connected to an inverting input terminal of the second operational amplifier U1B and an output terminal of the second operational amplifier U1B; a second end of the seventh filtering resistor R11 is respectively electrically connected to a first end of the fifth filtering capacitor C7 and a non-inverting input terminal of the second operational amplifier U1B; a second end of the fifth filtering capacitor C7 is grounded; an output terminal of the second operational amplifier U1B is electrically connected to the current reference module 103.

[0100] In one embodiment, the current reference module 103 includes a voltage regulation sub-module 1031 and a segmentation sub-module 1032; the voltage regulation sub-module 1031 is electrically connected to the segmentation sub-module 1032; the segmentation sub-module 1032 is also electrically connected to the control module 102.

[0101] It should be noted that the power supply signal VCC is input into the voltage regulation sub-module 1031, and a constant reference voltage is output, where the reference voltage can be adjusted according to requirements. The reference voltage is input into the segmentation sub-module 1032, and an adjustable reference voltage signal is output for setting current segmentation.

[0102] In one embodiment, as Figure 4 shown, the voltage regulation sub-module 1031 includes a first voltage regulation resistor R12, a second voltage regulation resistor R13, a third voltage regulation resistor R14, a first voltage regulation capacitor C8, a second voltage regulation capacitor C9, and a voltage reference chip U2; the first end of the first voltage regulation resistor R12 is electrically connected to the power supply and the first end of the first voltage regulation capacitor C8 respectively; the second end of the first voltage regulation resistor R12 is electrically connected to the first end of the second voltage regulation resistor R13 and the voltage reference chip U2 respectively; the second end of the second voltage regulation resistor R13 is electrically connected to the first end of the third voltage regulation resistor R14 and the voltage reference chip U2 respectively; the second end of the third voltage regulation resistor R14 is electrically connected to the second end of the first voltage regulation capacitor C8 and the voltage reference chip U2 respectively; the first end of the second voltage regulation capacitor C9 is electrically connected to the voltage reference chip U2 and the segmentation sub-module 1032 respectively; the second end of the second voltage regulation capacitor C9 is electrically connected to the voltage reference chip U2 and the segmentation sub-module 1032 respectively; the segmentation sub-module 1032 includes a first segmentation resistor R15, a second segmentation resistor R16, a segmentation capacitor C10, and a first potentiometer RP1; the first end of the first segmentation resistor R15 is electrically connected to the first end of the second voltage regulation capacitor C9; the second end of the first segmentation resistor R15 is electrically connected to the first end of the first potentiometer RP1; the second end of the first potentiometer RP1 is electrically connected to the second end of the second segmentation resistor R16 and the first end of the segmentation capacitor C10 respectively; the first end of the second segmentation resistor R16 is electrically connected to the second end of the segmentation capacitor C10; the first end of the segmentation capacitor C10 is also electrically connected to the control module 102; the second end of the segmentation capacitor C10 is grounded.

[0103] It should be understood that the constant reference voltage output by the voltage stabilizing sub-module 1031 is preliminarily divided by the first segmented resistor R15 and the second segmented resistor R16. The segmented capacitor C10 is used to filter out the residual noise in the voltage signal after voltage division, further improving the stability of the signal. The first potentiometer RP1 and the first segmented resistor R15 and the second segmented resistor R16 together form an adjustable voltage division circuit. By adjusting the resistance value of the first potentiometer RP1, the voltage division ratio can be changed, so as to output reference voltage signals with different amplitudes. These reference voltage signals with different amplitudes correspond to different current segmentation ranges, providing a reference for subsequent current comparison and control.

[0104] In one embodiment, the control module 102 includes: a conversion sub-module 1021 and an adjustment sub-module 1022; the conversion sub-module 1021 is electrically connected to the current sampling module 101, the current reference module 103 and the adjustment sub-module 1022 respectively; the adjustment sub-module 1022 is also electrically connected to the DC system.

[0105] It should be noted that the current detection signal output by the current sampling circuit and the reference voltage signal output by the current segmentation reference circuit are simultaneously input into the conversion sub-module 1021. Through the conversion sub-module 1021, the measured current signal is subtracted from the reference voltage and then amplified, and the current difference signal is converted into a voltage signal and input into the adjustment sub-module 1022. The voltage signal is divided by the adjustment sub-module 1022 and then output a control signal in equal proportion to control the voltage output of the DC system.

[0106] In one embodiment, as Figure 5As shown, the conversion sub-module 1021 includes: a first conversion resistor R20, a second conversion resistor R21, a third conversion resistor R22, a fourth conversion resistor R23, a fifth conversion resistor R24, a first conversion capacitor C20, a second conversion capacitor C21, and a third operational amplifier U1C; a first end of the first conversion resistor R20 is electrically connected to the current sampling module 101; a second end of the first conversion resistor R20 is respectively electrically connected to an inverting input end of the third operational amplifier U1C, a first end of the third conversion resistor R22, and a first end of the second conversion capacitor C21; a first end of the second conversion resistor R21 is electrically connected to the current reference module 103; a second end of the second conversion resistor R21 is respectively electrically connected to a first end of the fourth conversion resistor R23, a first end of the first conversion capacitor C20, and a non-inverting input end of the third operational amplifier U1C; a second end of the second conversion capacitor C21 is respectively electrically connected to a second end of the third conversion resistor R22 and a first end of the fifth conversion resistor R24; a second end of the fifth conversion resistor R24 is electrically connected to the adjustment sub-module 1022; a second end of the fourth conversion resistor R23 is respectively electrically connected to a second end of the first conversion capacitor C20; the adjustment sub-module 1022 includes: a first adjustment resistor R25, a second adjustment resistor R26, a third adjustment resistor R27, a fourth adjustment resistor R28, an adjustment capacitor C22, a second potentiometer PR2, and a fourth operational amplifier U1D; a first end of the second potentiometer PR2 is electrically connected to a second end of the fifth conversion resistor R24; a second end of the second potentiometer PR2 is respectively electrically connected to a non-inverting input end of the fourth operational amplifier U1D, a first end of the first adjustment resistor R25, and a first end of the adjustment capacitor C22; a second end of the first adjustment resistor R25 is electrically connected to a second end of the adjustment capacitor C22; an inverting input end of the fourth operational amplifier U1D is respectively electrically connected to a second end of the second adjustment resistor R26 and a first end of the third adjustment resistor R27; a first end of the second adjustment resistor R26 is grounded; a second end of the third adjustment resistor R27 is respectively electrically connected to an output end of the fourth operational amplifier U1D and a first end of the fourth adjustment resistor R28; a second end of the fourth adjustment resistor R28 is electrically connected to the DC system.

[0107] It should be noted that the current detection signal and the reference voltage signal are respectively input to the positive and negative input terminals of the operational amplifier U1. The first conversion resistor R20, the second conversion resistor R21, the third conversion resistor R22, the fourth conversion resistor R23, and the fifth conversion resistor R24 set the gain of the differential amplifier circuit. The first conversion capacitor C20 and the second conversion capacitor C21 are used to filter out high-frequency noise and improve the stability of the signal. The operational amplifier U1C amplifies the difference between the two input signals and outputs a voltage signal proportional to the current difference. The output voltage signal is input to a circuit composed of the first adjustment resistor R25, the second adjustment resistor R26, the third adjustment resistor R27, the fourth adjustment resistor R28, the adjustment capacitor C22, the second potentiometer RP2, and the operational amplifier U1D. By adjusting the resistance value of the potentiometer RP2, the voltage division ratio is changed, and the input voltage signal is divided by a set ratio and then output. The output control signal is transmitted to the voltage adjustment circuit in the voltage regulator to control the output voltage of the DC system.

[0108] The voltage regulation circuit 10 based on the DC system provided by the present application, the circuit includes: a current sampling module 101, a current reference module 103, and a control module 102; the circuit includes: a current sampling module 101, a current reference module 103, and a control module 102; the current sampling module 101 is electrically connected to the control module 102 and is used to detect the charging current of the battery in real time, obtain the sampled current value, and output a current detection signal corresponding to the sampled current value to the control module 102 according to the sampled current value; the current reference module 103 is electrically connected to the control module 102 and is used to set a corresponding reference voltage value according to the preset segmented current and output a reference voltage signal corresponding to the reference voltage value to the control module 102; the control module 102 is used to perform segmented control on the sampled current value according to the current detection signal and the reference voltage signal, obtain a voltage control signal corresponding to the sampled current value, and control the voltage output of the DC system according to the voltage control signal. By setting the current sampling module 101 to monitor the sampled current value in real time, setting the reference voltage of the segmented current, and adjusting the voltage of the DC system according to the monitored sampled current value and the reference voltage, the present application solves the problem of too high or unstable voltage of the DC system and improves the safety of battery use.

[0109] Embodiment 2

[0110] In addition, this embodiment also provides an electronic device, including the voltage regulation circuit 10 based on the DC system provided in Embodiment 1. To avoid repetition, it will not be described in detail here.

[0111] The device embodiments described above are merely illustrative. For example, the flowcharts and block diagrams in the accompanying drawings show the possible architectures, functions, and operations of devices, methods, and computer program products according to multiple embodiments of the present application. In this regard, each block in the flowchart or block diagram may represent a module, a program segment, or a part of code, and the module, program segment, or part of code contains one or more executable instructions for implementing the specified logical function. It should also be noted that in an alternative implementation, the functions marked in the blocks may occur in a different order than that marked in the accompanying drawings. For example, two consecutive blocks may actually be executed substantially in parallel, and they may sometimes be executed in the reverse order, depending on the functions involved. It should also be noted that each block in the block diagram and / or flowchart, as well as the combination of blocks in the block diagram and / or flowchart, can be implemented by a dedicated hardware-based system that performs the specified functions or actions, or can be implemented by a combination of dedicated hardware and computer instructions.

[0112] In addition, each functional module or unit in various embodiments of the present application may be integrated together to form an independent part, or each module may exist alone, or two or more modules may be integrated to form an independent part.

[0113] If the described functions are implemented in the form of software functional modules and sold or used as an independent product, they can be stored in a computer-readable storage medium. Based on this understanding, the technical solution of the present application, in essence, or the part that contributes to the prior art, or a part of this technical solution, can be embodied in the form of a software product. This computer software product is stored in a storage medium and includes several instructions for causing a computer device (which may be a smart phone, a personal computer, a server, or a network device, etc.) to execute all or part of the steps of the methods described in various embodiments of the present application.

[0114] As described above, the above are only specific embodiments of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art within the technical scope disclosed by the present application can easily think of changes or substitutions, which should all be covered by the protection scope of the present application.

Claims

1. A voltage regulating circuit based on a DC system, characterized in that The circuit includes: a current sampling module, a current reference module, and a control module; The current sampling module, electrically connected to the control module, is used to detect the charging current of the battery in real time, obtain a sampled current value, and output a current detection signal corresponding to the sampled current value to the control module according to the sampled current value; The current reference module, electrically connected to the control module, is used to set corresponding reference voltage values according to preset segmented currents and output a reference voltage signal corresponding to the reference voltage value to the control module; The control module is used to perform segmented control on the sampled current value according to the current detection signal and the reference voltage signal, obtain a voltage control signal corresponding to the sampled current value, and control the voltage output of the DC system according to the voltage control signal.

2. The voltage regulating circuit based on a DC system according to claim 1, characterized in that, The current sampling module includes: a first filtering sub-module, a second filtering sub-module, and a differential amplification sub-module; The differential amplification sub-module is electrically connected to the first filtering sub-module and the second filtering sub-module respectively; The second filtering sub-module is electrically connected to the control module.

3. The voltage regulating circuit based on the DC system according to claim 2, characterized in that, The first filtering sub-module includes: a first magnetic bead, a second magnetic bead, a filter, a first filtering capacitor, a second filtering capacitor, a first filtering resistor, a second filtering resistor, a third filtering resistor, and a fourth filtering resistor; The first end of the first magnetic bead is electrically connected to the negative pole of the charging terminal, and the second end of the first magnetic bead is electrically connected to the first end of the first filtering capacitor; The first end of the second magnetic bead is electrically connected to the positive pole of the charging terminal, and the second end of the second magnetic bead is electrically connected to the second end of the first filtering capacitor; The first end of the filter is electrically connected to the first end of the first filtering capacitor and the second end of the first filtering capacitor respectively; The second end of the filter is electrically connected to the first end of the second filtering capacitor and the second end of the second filtering capacitor respectively; The first end of the second filtering capacitor is further electrically connected to the second end of the first filtering resistor, the first end of the third filtering resistor, and the differential amplification sub-module respectively; The second end of the second filtering capacitor is further electrically connected to the second end of the second filtering resistor, the first end of the fourth filtering resistor, and the differential amplification sub-module respectively; The first end of the first filtering resistor is further electrically connected to the first end of the second filtering resistor; The second end of the third filtering resistor is further electrically connected to the second end of the fourth filtering resistor; The second end of the second filtering resistor is electrically connected to the first end of the fourth filtering resistor.

4. The voltage regulating circuit based on a DC system according to claim 3, wherein, The differential amplification sub-module includes: a first amplification resistor, a second amplification resistor, a third amplification resistor, a fourth amplification resistor, a first amplification capacitor, a second amplification capacitor, and a first operational amplifier; The first end of the first amplification resistor is electrically connected to the first end of the second filtering capacitor; The second end of the first amplification resistor is electrically connected to the inverting input terminal of the first operational amplifier and the first end of the fourth amplification resistor respectively; The first end of the second amplification resistor is electrically connected to the second end of the second filtering capacitor; The second end of the second amplification resistor is electrically connected to the non-inverting input terminal of the first operational amplifier, the first end of the third amplification resistor, and the first end of the first amplification capacitor respectively; The first end of the third amplification resistor is electrically connected to the first end of the first amplification capacitor; The second end of the third amplification resistor is electrically connected to the second end of the first amplification capacitor; The first end of the fourth amplification resistor is further electrically connected to the first end of the second amplification capacitor; The second end of the fourth amplification resistor is further electrically connected to the second end of the second amplification capacitor, the output terminal of the first operational amplifier, and the second filtering sub-module respectively; The output terminal of the first operational amplifier is further electrically connected to the second filtering sub-module.

5. The voltage regulating circuit based on a DC system according to claim 4, characterized in that, The second filtering sub-module includes: a fifth filtering resistor, a sixth filtering resistor, a seventh filtering resistor, a third filtering capacitor, a fourth filtering capacitor, a fifth filtering capacitor, and a second operational amplifier; The first end of the fifth filtering resistor is electrically connected to the second end of the fourth amplification resistor and the output terminal of the first operational amplifier respectively; The second end of the fifth filtering resistor is electrically connected to the first end of the third filtering capacitor and the first end of the sixth filtering resistor respectively; The second end of the third filtering capacitor is grounded; The second end of the sixth filtering resistor is electrically connected to the first end of the seventh filtering resistor and the first end of the fourth filtering capacitor respectively; The second end of the fourth filtering capacitor is electrically connected to the inverting input terminal of the second operational amplifier and the output terminal of the second operational amplifier respectively; The second end of the seventh filtering resistor is electrically connected to the first end of the fifth filtering capacitor and the non-inverting input terminal of the second operational amplifier respectively; The second end of the fifth filtering capacitor is grounded; The output terminal of the second operational amplifier is electrically connected to the current reference module.

6. The voltage regulating circuit based on a DC system according to claim 1, wherein The current reference module includes: a voltage stabilizing sub-module and a segmentation sub-module; The voltage stabilizing sub-module is electrically connected to the segmentation sub-module; The segmentation sub-module is further electrically connected to the control module.

7. The voltage regulating circuit based on a DC system according to claim 6, wherein The voltage stabilizing sub-module includes: a first voltage stabilizing resistor, a second voltage stabilizing resistor, a third voltage stabilizing resistor, a first voltage stabilizing capacitor, a second voltage stabilizing capacitor, and a voltage reference chip; The first end of the first voltage stabilizing resistor is electrically connected to the power supply and the first end of the first voltage stabilizing capacitor respectively; The second end of the first voltage stabilizing resistor is electrically connected to the first end of the second voltage stabilizing resistor and the voltage reference chip respectively; The second end of the second voltage stabilizing resistor is electrically connected to the first end of the third voltage stabilizing resistor and the voltage reference chip respectively; The second end of the third voltage stabilizing resistor is electrically connected to the second end of the first voltage stabilizing capacitor and the voltage reference chip respectively; The first end of the second voltage stabilizing capacitor is electrically connected to the voltage reference chip and the segmentation sub-module respectively; The second end of the second voltage stabilizing capacitor is electrically connected to the voltage reference chip and the segmentation sub-module respectively; The segmentation sub-module includes: a first segmentation resistor, a second segmentation resistor, a segmentation capacitor, and a first potentiometer; The first end of the first segmentation resistor is electrically connected to the first end of the second voltage stabilizing capacitor; The second end of the first segmented resistor is electrically connected to the first end of the first potentiometer; The second end of the first potentiometer is electrically connected to the second end of the second segmented resistor and the first end of the segmented capacitor respectively; The first end of the second segmented resistor is electrically connected to the second end of the segmented capacitor; The first end of the segmented capacitor is also electrically connected to the control module; The second end of the segmented capacitor is grounded.

8. The voltage regulating circuit based on the DC system according to claim 1, characterized in that, The control module includes: a conversion sub-module and an adjustment sub-module; The conversion sub-module is electrically connected to the current sampling module, the current reference module and the adjustment sub-module respectively; The adjustment sub-module is also electrically connected to the DC system.

9. The voltage regulation circuit based on the DC system according to claim 8, wherein The conversion sub-module includes: a first conversion resistor, a second conversion resistor, a third conversion resistor, a fourth conversion resistor, a fifth conversion resistor, a first conversion capacitor, a second conversion capacitor and a third operational amplifier; The first end of the first conversion resistor is electrically connected to the current sampling module; The second end of the first conversion resistor is electrically connected to the inverting input terminal of the third operational amplifier, the first end of the third conversion resistor and the first end of the second conversion capacitor respectively; The first end of the second conversion resistor is electrically connected to the current reference module; The second end of the second conversion resistor is electrically connected to the first end of the fourth conversion resistor, the first end of the first conversion capacitor and the non-inverting input terminal of the third operational amplifier respectively; The second end of the second conversion capacitor is electrically connected to the second end of the third conversion resistor and the first end of the fifth conversion resistor respectively; The second end of the fifth conversion resistor is electrically connected to the adjustment sub-module; The second end of the fourth conversion resistor is electrically connected to the second end of the first conversion capacitor respectively; The adjustment sub-module includes: a first adjustment resistor, a second adjustment resistor, a third adjustment resistor, a fourth adjustment resistor, an adjustment capacitor, a second potentiometer and a fourth operational amplifier; The first end of the second potentiometer is electrically connected to the second end of the fifth conversion resistor; The second end of the second potentiometer is electrically connected to the non-inverting input terminal of the fourth operational amplifier, the first end of the first adjustment resistor and the first end of the adjustment capacitor respectively; The second end of the first adjustment resistor is electrically connected to the second end of the adjustment capacitor; The inverting input terminal of the fourth operational amplifier is electrically connected to the second end of the second adjustment resistor and the first end of the third adjustment resistor respectively; The first end of the second adjustment resistor is grounded; The second end of the third adjustment resistor is electrically connected to the output terminal of the fourth operational amplifier and the first end of the fourth adjustment resistor respectively; The second end of the fourth adjustment resistor is electrically connected to the DC system.

10. An electronic device, characterized in that, It includes the voltage regulating circuit based on the DC system according to any one of claims 1-9.

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