Power supply control circuit and auxiliary power supply

Abstract

The utility model belongs to the technical field of power electronics, and provides a power supply control circuit and an auxiliary power supply, and the power supply control circuit comprises a control module, a switch module, and a main control module. The control module is respectively connected with the switch module and the battery, and the switch module is also respectively connected with the main control module and the power supply; the control module is used for collecting battery voltage, outputting a first control signal when the battery voltage is larger than preset voltage, and outputting a second control signal when the battery voltage is smaller than or equal to the preset voltage. The switch module is used for being switched on when receiving the first control signal to enable the power supply to supply power to the main control module and being switched off when receiving the second control signal; and the main control module is used for providing voltage for other chips in the auxiliary power supply when being electrified. Power supply is started only when the battery voltage is larger than the preset voltage, unnecessary energy consumption is avoided, and the energy utilization efficiency is improved. In addition, the battery is prevented from being over-discharged when the voltage is insufficient, and the service life of the battery is prolonged.

Description

Technical Field

[0001] The present application belongs to the field of power electronics technology, and specifically relates to a power supply control circuit and an auxiliary power supply. Background Art

[0002] With the rapid development of technologies like energy storage and photovoltaic power generation, the demand for energy conservation is increasing. As a crucial component in energy storage systems, the reliable operation of the auxiliary power supply is crucial for stable system operation. Furthermore, the efficiency of this auxiliary power supply significantly impacts the efficiency of the entire energy storage system, while its standby power consumption also impacts the battery's lifespan.

[0003] The battery serves as both the input and energy source for the auxiliary power supply. The auxiliary power supply is always connected to the battery, and an energy-efficient auxiliary power supply can effectively extend the battery life. Low power consumption is particularly important when the battery is feeding power, as otherwise the battery will enter undervoltage protection, reducing its service life. Utility Model Content

[0004] The embodiments of the present application provide a power supply control circuit and an auxiliary power supply, which can prevent the chip in the auxiliary power supply from consuming battery power when the battery is under-voltage, thereby reducing battery loss.

[0005] In a first aspect, an embodiment of the present application provides a power supply control circuit, comprising: a control module, a switch module, and a main control module; the control module is connected to the switch module and the battery, respectively, and the switch module is also connected to the main control module and the power supply, respectively; the control module is used to collect the battery voltage, and output a first control signal when the battery voltage is greater than a preset voltage, and output a second control signal when the battery voltage is less than or equal to a preset voltage; the switch module is used to turn on when receiving the first control signal so that the power supply supplies power to the main control module, and to disconnect when receiving the second control signal; the main control module is used to provide voltage to the remaining chips in the auxiliary power supply when power is turned on.

[0006] In some embodiments, the control module includes a voltage detection unit and a control unit; the voltage detection unit is connected to the battery and the control unit respectively, and the control unit is also connected to the switch module; the voltage detection unit is used to collect the battery voltage; the control unit is used to output the first control signal when the battery voltage is greater than the preset voltage.

[0007] In some embodiments, the switch module includes a first switch unit and a second switch unit; the first switch unit is connected to the control module and the second switch unit, respectively, and the second switch unit is also connected to the power supply and the main control module, respectively; the first switch unit is used to turn on when receiving the first control signal, and to turn off when receiving the second control signal; the second switch unit is used to turn on when the first switch unit is turned on so that the power supply supplies power to the main control module through the second switch unit, and to turn off when the first switch unit is disconnected.

[0008] In some embodiments, the first switch unit includes an optocoupler P1; a first input end of the optocoupler P1 is connected to the control module, a second input end of the optocoupler P1 is grounded, a first output end of the optocoupler P1 is connected to a first input end of the second switch unit, and a second output end of the optocoupler P1 is connected to a control end of the second switch unit.

[0009] In some embodiments, the first switch unit further includes a resistor R3; the first input end of the optical coupler P1 is connected to the control module through the resistor R3.

[0010] In some embodiments, the second switch unit includes a switch tube Q1, a resistor R1, a resistor R2, and a resistor R4; the control end of the switch tube Q1 is respectively connected to the second end of the resistor R1 and the second output end of the first switch unit, the second end of the switch tube Q1 is connected to the power supply through the resistor R4, the second end of the switch tube Q1 is also connected to the first output end of the first switch unit through the resistor R2, and the third end of the switch tube Q1 is respectively connected to the first end of the resistor R1 and the main control module.

[0011] In some embodiments, the main control module includes a power supply chip U1; the power supply end of the power supply chip U1 is connected to the switch module, and the output end of the power supply chip is connected to the remaining chips in the auxiliary power supply.

[0012] In some embodiments, the main control module further includes a capacitor C1; a first end of the capacitor C1 is connected to the power supply end of the power supply chip U1, and a second end of the capacitor C1 is grounded.

[0013] In a second aspect, an embodiment of the present application provides an auxiliary power supply, which includes the power supply control circuit as described above.

[0014] The embodiment of the present application provides a power supply control circuit and an auxiliary power supply, the power supply control circuit comprising: a control module, a switch module, and a main control module; the control module is connected to the switch module and the battery respectively, and the switch module is also connected to the main control module and the power supply respectively; the control module is used to collect the battery voltage and output a first control signal when the battery voltage is greater than a preset voltage, and output a second control signal when the battery voltage is less than or equal to a preset voltage; the switch module is used to conduct upon receiving the first control signal so that the power supply supplies power to the main control module, and to disconnect upon receiving the second control signal; the main control module is used to provide voltage to the remaining chips in the auxiliary power supply when power is turned on. The embodiment of the present application only starts power supply when the battery voltage is greater than the preset voltage, avoiding unnecessary energy consumption and improving energy utilization efficiency. In addition, it prevents the battery from over-discharging when the voltage is insufficient, which helps to extend the battery life. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] One or more embodiments are exemplarily illustrated by corresponding drawings, which do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0016] Figure 1 1 is a structural block diagram of a power supply control circuit 100 provided in one embodiment of the present application;

[0017] Figure 2 is a structural block diagram of a power supply control circuit 100 provided in another embodiment of the present application;

[0018] Figure 3 1 is a schematic diagram of the circuit structure of the power supply control circuit 100 provided in one embodiment of the present application. DETAILED DESCRIPTION

[0019] To make the objectives, technical solutions, and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described in detail below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present application, not all of them. It should be understood that the specific embodiments described herein are only used to explain the present application and are not intended to limit the present application.

[0020] The technical features involved in the various embodiments of the present application described below do not conflict with each other and can be combined with each other.

[0021] When an element is referred to as being “connected to” another element, it can be directly connected to the other element, or one or more intervening elements may be present therebetween.

[0022] The terms "first," "second," and the like in the specification and claims of this application are used to distinguish similar objects, and are not used to describe a particular order or precedence. It should be understood that the terms used in this manner are interchangeable where appropriate, so that the embodiments of this application can be implemented in orders other than those illustrated or described herein. Furthermore, the terms "first," "second," and the like generally distinguish objects of a class and do not limit the number of objects. For example, the first object may be one or more.

[0023] See also Figure 1 , Figure 1 1 is a structural block diagram of a power supply control circuit 100 provided in an embodiment of the present application.

[0024] An embodiment of the present application provides a power supply control circuit 100 , including: a control module 10 , a switch module 20 , and a main control module 30 .

[0025] The control module 10 is connected to the switch module 20 and the battery 200 respectively, and the switch module 20 is further connected to the main control module 30 and the power supply 300 respectively.

[0026] Specifically, the control module 10 is configured to collect the battery voltage and output a first control signal when the battery voltage is greater than a preset voltage, and a second control signal when the battery voltage is less than or equal to the preset voltage. The switch module 20 is configured to conduct upon receiving the first control signal, allowing the power supply 300 to supply power to the main control module 30, and to disconnect upon receiving the second control signal. The main control module 30 is configured to provide voltage to the remaining chips in the auxiliary power supply when powered on.

[0027] The battery voltage is the output voltage of the battery 200 .

[0028] It should be noted that when the battery voltage is less than a preset voltage, it indicates that the battery is in an undervoltage state. The preset voltage is set according to the model of the battery 200. For example, when the output voltage of the battery 200 is less than 20V, the battery 200 is in an undervoltage state, and the preset voltage can be set to 20V.

[0029] The power supply control circuit 100 provided in the embodiment of the present application starts power supply only when the battery voltage is greater than the preset voltage, thereby avoiding unnecessary energy consumption and improving energy utilization efficiency. It can also prevent the battery from over-discharging when the voltage is insufficient, which helps to extend the service life of the battery. Ensuring that the remaining chips in the auxiliary power supply operate under appropriate power supply conditions and provide stable voltage helps to improve the reliability and stability of the entire system. By monitoring the battery voltage and outputting the corresponding control signal through the control module, intelligent management of power supply is achieved to adapt to different working states and battery conditions. Rational use of power resources reduces unnecessary power loss and equipment loss, thereby reducing the overall cost of the system to a certain extent. Stable power supply helps to improve the performance of the entire system and reduce faults and errors caused by unstable voltage.

[0030] See also Figure 2 , Figure 2 1 is a structural block diagram of a power supply control circuit 100 provided in another embodiment of the present application.

[0031] In some embodiments, the control module 10 includes a voltage detection unit 11 and a control unit 12. The voltage detection unit 11 is connected to the battery 200 and the control unit 12, respectively. The control unit 12 is also connected to the switch module 20. Specifically, the voltage detection unit 11 is used to collect the battery voltage. The control unit 12 is used to output a first control signal when the battery voltage is greater than a preset voltage, and to output a second control signal when the battery voltage is less than or equal to the preset voltage.

[0032] The voltage detection unit 11 includes components such as a voltage divider resistor, an analog-to-digital converter, a filter capacitor, etc. The control unit 12 can be an MCU (Micro Control Unit) or other suitable control devices.

[0033] In this embodiment, the voltage detection unit 11 collects the battery voltage and transmits the battery voltage to the control unit 12. When the battery voltage is greater than a preset voltage, the control unit 12 outputs a first control signal to the switch module 20. When the battery voltage is less than or equal to the preset voltage, the control unit 12 outputs a second control signal to the switch module 20.

[0034] It should be noted that the first control signal is a high-level signal, and the second control signal is a low-level signal.

[0035] In some embodiments, the switch module 20 includes a first switch unit 21 and a second switch unit 22. The first switch unit 21 is connected to the control module 10 and the second switch unit 22, respectively. The second switch unit 22 is also connected to the power supply 300 and the main control module 30, respectively. Specifically, the first switch unit 21 is configured to be turned on upon receiving a first control signal and turned off upon receiving a second control signal. The second switch unit 22 is configured to be turned on when the first switch unit 21 is turned on, allowing the power supply 300 to supply power to the main control module 30 through the second switch unit 22, and to be turned off when the first switch unit 21 is turned off.

[0036] See also Figure 3 , Figure 3 1 is a schematic diagram of the circuit structure of the power supply control circuit 100 provided in one embodiment of the present application.

[0037] In some embodiments, the first switch unit 21 includes an optical coupler P1. A first input terminal of the optical coupler P1 is connected to the control module 10, a second input terminal of the optical coupler P1 is grounded, a first output terminal of the optical coupler P1 is connected to a first input terminal of the second switch unit 22, and a second output terminal of the optical coupler P1 is connected to a control terminal of the second switch unit 22.

[0038] In some embodiments, the first switch unit 21 further includes a resistor R3 , wherein the first input terminal of the optical coupler P1 is connected to the control module 10 via the resistor R3 .

[0039] In some embodiments, the second switch unit 22 includes a switch tube Q1, a resistor R1, a resistor R2, and a resistor R4. The control end of the switch tube Q1 is connected to the second end of the resistor R1 and the second output end of the first switch unit 21, respectively. The second end of the switch tube Q1 is connected to the power supply 300 via the resistor R4. The second end of the switch tube Q1 is also connected to the first output end of the first switch unit 21 via the resistor R2. The third end of the switch tube Q1 is connected to the first end of the resistor R1 and the main control module 30.

[0040] The switch Q1 is an NPN transistor. The base of the NPN transistor serves as the control terminal of the switch Q1, the collector of the NPN transistor serves as the second terminal of the switch Q1, and the emitter of the NPN transistor serves as the third terminal of the switch Q1. In other embodiments, the switch Q1 may be a PNP transistor or a MOSFET (Metal-Oxide-Semiconductor Field-Effect Transistor).

[0041] In some embodiments, the main control module 30 includes a power supply chip U1 , wherein a power terminal of the power supply chip U1 is connected to the switch module 20 , and an output terminal of the power supply chip is connected to other chips in the auxiliary power supply 300 .

[0042] The power supply chip U1 may be a linear regulator chip, such as 7805, 7812, etc.; or a switching regulator chip, such as LM2596, TPS5430, etc.; or other suitable voltage output chips.

[0043] In some embodiments, the main control module 30 further includes a capacitor C1 , wherein a first end of the capacitor C1 is connected to a power supply terminal of the power supply chip U1 , and a second end of the capacitor C1 is grounded.

[0044] The following combination Figure 3 The operating principle of the power supply control circuit 100 will be described.

[0045] The battery detection unit 11 collects the battery voltage, and the control unit 12 is connected to the 1st pin of the optical coupler P1 through the resistor R3 ( Figure 3 (The optocoupler P1 in the middle (the other pins are similar) has pin 2 of optocoupler P1 connected to ground, pin 4 of optocoupler P1 connected to the base of switch Q1, resistor R1 connected in parallel between the base of switch Q1 and the emitter of switch Q1, pin 3 of optocoupler P1 connected to the collector of switch Q1 through resistor R2, and the emitter of switch Q1 connected to pin 5 (Vcc) of chip U1. Pin 5 of chip U1 is connected to ground in parallel with a filter capacitor C1. VCCP is a stable supply voltage. When switch Q1 is on, VCCP powers chip U1 through a current-limiting resistor R4 and switch Q1.

[0046] Specifically, the battery detection unit 11 collects the battery voltage.

[0047] When the battery voltage is greater than the preset voltage (i.e., indicating that the battery 200 is not undervoltage), the control unit 12 will output a high-level signal (i.e., the first control signal). This high-level signal is sent to pin 1 of the optocoupler P1 through resistor R3, causing the diode in the optocoupler P1 to conduct, thereby causing the transistors in the optocoupler P1 (pins 3 and 4 of the optocoupler P1) to be in the on state. Then, resistors R2 and R1 are connected together. At this time, VCCP is divided by resistors R4, R2, and R1 and sent to the base of the switch Q1, causing the transistor Q1 to conduct. At this time, VCCP will provide voltage to pin 5 (Vcc pin) of chip U1 through resistor R4 and switch Q1. After receiving the voltage, chip U1 will operate normally and provide voltage to other chips in the auxiliary power supply, thereby enabling the auxiliary power supply to operate.

[0048] When the battery voltage is less than or equal to a preset voltage (indicating an undervoltage condition in battery 200), control unit 12 outputs a low-level signal (a second control signal). The diode in optocoupler P1 is not conducting, disconnecting transistor Q1 and preventing the VCCP voltage from being supplied to pin 5 of chip U1. At this point, the remaining chips in the auxiliary power supply are inoperative. This effectively conserves battery energy and extends battery life.

[0049] The power supply control circuit 100 provided in the embodiment of the present application starts power supply only when the battery voltage is greater than the preset voltage, thereby avoiding unnecessary energy consumption and improving energy utilization efficiency. It can also prevent the battery from over-discharging when the voltage is insufficient, which helps to extend the service life of the battery. Ensuring that the remaining chips in the auxiliary power supply operate under appropriate power supply conditions and provide stable voltage helps to improve the reliability and stability of the entire system. By monitoring the battery voltage and outputting the corresponding control signal through the control module, intelligent management of power supply is achieved to adapt to different working states and battery conditions. Rational use of power resources reduces unnecessary power loss and equipment loss, thereby reducing the overall cost of the system to a certain extent. Stable power supply helps to improve the performance of the entire system and reduce faults and errors caused by unstable voltage.

[0050] The embodiment of the present application further provides an auxiliary power supply, which includes the power supply control circuit 100 as described above.

[0051] The auxiliary power supply generally includes components such as a transformer, a diode, a capacitor, a resistor, a voltage regulator chip, an inductor, a transistor or a field effect transistor (MOSFET), a photocoupler, and a fuse.

[0052] Transformers are used to change voltage levels, achieving voltage conversion between input and output. Diodes are used for rectification, converting AC voltage into DC voltage. Capacitors include filter capacitors and energy storage capacitors. Filter capacitors are used to smooth the output DC voltage and reduce ripple. Energy storage capacitors are used to provide energy when the power supply output is unstable. Resistors are used for voltage division, current limiting, etc. Voltage regulator chips such as linear regulators (LDOs) or switching regulators provide stable output voltage. In switching power supplies, inductors, together with capacitors, form a filter circuit to reduce electromagnetic interference. Transistors or field-effect transistors (MOSFETs): They act as switching elements in switching power supplies to control the transfer of energy. Optocouplers are used to achieve isolation and feedback control between input and output. Fuses provide overcurrent protection to prevent circuit overload damage.

[0053] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Under the idea of the present invention, the technical features in the above embodiments or different embodiments can also be combined, and there are many other changes in different aspects of the present invention as described above. For the sake of simplicity, they are not provided in detail. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or make equivalent replacements for some of the technical features therein. These modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A power supply control circuit, characterized in that: include: Control module, switch module, main control module; The control module is connected to the switch module and the battery respectively, and the switch module is also connected to the main control module and the power supply respectively; The control module is used to collect the battery voltage and output a first control signal when the battery voltage is greater than a preset voltage, and output a second control signal when the battery voltage is less than or equal to the preset voltage; The switch module is configured to be turned on when receiving the first control signal so that the power supply supplies power to the main control module, and to be turned off when receiving the second control signal; The main control module is used to provide voltage to the remaining chips in the auxiliary power supply when powered on.

2. The power supply control circuit according to claim 1, characterized in that: The control module includes a voltage detection unit and a control unit; The voltage detection unit is connected to the battery and the control unit respectively, and the control unit is also connected to the switch module; The voltage detection unit is used to collect the battery voltage; The control unit is configured to output the first control signal when the battery voltage is greater than the preset voltage, and output the second control signal when the battery voltage is less than or equal to the preset voltage.

3. The power supply control circuit according to claim 1, wherein: The switch module includes a first switch unit and a second switch unit; The first switch unit is connected to the control module and the second switch unit respectively, and the second switch unit is also connected to the power supply and the main control module respectively; The first switch unit is configured to be turned on upon receiving the first control signal, and turned off upon receiving the second control signal; The second switch unit is configured to be turned on when the first switch unit is turned on so that the power supply supplies power to the main control module through the second switch unit, and to be turned off when the first switch unit is turned off.

4. The power supply control circuit according to claim 3, characterized in that: The first switch unit includes an optical coupler P1; The first input end of the optocoupler P1 is connected to the control module, the second input end of the optocoupler P1 is grounded, the first output end of the optocoupler P1 is connected to the first input end of the second switch unit, and the second output end of the optocoupler P1 is connected to the control end of the second switch unit.

5. The power supply control circuit according to claim 4, characterized in that: The first switch unit further includes a resistor R3; The first input terminal of the optical coupler P1 is connected to the control module through the resistor R3.

6. The power supply control circuit according to claim 3, characterized in that: The second switch unit includes a switch tube Q1, a resistor R1, a resistor R2 and a resistor R4; The control end of the switch tube Q1 is respectively connected to the second end of the resistor R1 and the second output end of the first switch unit. The second end of the switch tube Q1 is connected to the power supply through the resistor R4. The second end of the switch tube Q1 is also connected to the first output end of the first switch unit through the resistor R2. The third end of the switch tube Q1 is respectively connected to the first end of the resistor R1 and the main control module.

7. The power supply control circuit according to claim 1, characterized in that: The main control module includes a power supply chip U1; The power supply end of the power supply chip U1 is connected to the switch module, and the output end of the power supply chip is connected to the remaining chips in the auxiliary power supply.

8. The power supply control circuit according to claim 7, characterized in that: The main control module also includes a capacitor C1; A first end of the capacitor C1 is connected to the power supply terminal of the power supply chip U1 , and a second end of the capacitor C1 is grounded.

9. An auxiliary power supply, characterized in that: The auxiliary power supply includes the power supply control circuit according to any one of claims 1 to 8.

Images