AC / DC power supply conversion protection device

Abstract

The utility model provides an alternating current and direct current power supply conversion protection device which can meet the power supply requirements of different devices for alternating current and direct current, can avoid power failure and is stable in work. The system comprises an AC / DC power supply module used for converting alternating current commercial power into direct current and outputting power supply, a battery module used for storing energy and discharging, a charging module used for charging the battery module, and a first ideal diode circuit connected with the AC / DC power supply module and the charging module, the positive electrode is positively conducted when an input voltage is not less than a preset voltage; the soft protection module is connected with the battery module and the charging module and is used for protecting the battery module and preventing short circuit; the second ideal diode circuit is connected with the soft protection module and is used for preventing reverse current from being generated; and the output module is connected with the first ideal diode circuit and the second ideal diode circuit and is used for outputting the power supply to load equipment.

Description

TECHNICAL FIELD

[0001] The utility model relates to power supply equipment technical field, concretely is a kind of AC-DC power conversion protection device. BACKGROUND

[0002] Communication power supply is the key equipment of entire communication network, and communication power supply determines whether communication network can normally operate.5G network equipment power supply scheme requires that communication power supply system has brand-new definition and demand, needs to develop to meet 5G base station power supply scheme to adapt to the requirement of 5G era for network convenience, security, power supply reliability, and needs to meet the power supply demand of different equipment to alternating current and direct current, however, the existing 5G communication power supply, when AC-DC switching is used, power failure may occur, and work is not very stable. UTILITY MODEL CONTENTS

[0003] In view of the above problems, the utility model provides a kind of AC-DC power conversion protection device, it can meet the power supply demand of different equipment to alternating current and direct current, and can avoid power failure, and work is stable.

[0004] The utility model adopts following technical scheme, a kind of AC-DC power conversion protection device, it includes for the AC / DC power module for converting alternating current commercial power into direct current and carrying out output power supply, for energy storage and discharge battery module, for the charging module of the battery module charging, it further includes:

[0005] First ideal diode circuit, with the AC / DC power module, charging module are connected, for when input voltage is not less than preset voltage, forward conduction;

[0006] Soft protection module, with the battery module, charging module are connected, for protecting the battery module, prevent short circuit;Second ideal diode circuit, with the soft protection module is connected, for preventing reverse current;

[0007] Output module, with the first ideal diode circuit, second ideal diode circuit are connected, for power output to load equipment.

[0008] Further, the first ideal diode circuit comprises an ideal diode controller U1, an electrolytic capacitor EC1, a capacitor C1, a MOS tube Q1, a resistor R1, diodes D1-D4, an interface M1 and an interface M2, wherein the ideal diode controller U1 is a chip of model JW7260; the interface M1 is connected with the AC / DC power supply module, and the interface M2 is connected with the charging module; the 1st and 2nd pins of the interface M1 are connected with one end of the electrolytic capacitor EC1, the negative electrode of the diode D1, the negative electrode of the diode D3, the source of the MOS tube Q1, the 4th pin of the interface M2 and the 4th pin of the ideal diode controller U1, and are then connected with a power supply 48V; the 3rd and 4th pins of the interface M1 are connected with the other end of the electrolytic capacitor EC1 and the positive electrode of the diode D1, and are then grounded; the gate of the MOS tube Q1 is connected with the 5th pin of the ideal diode controller U1; the drain of the MOS tube Q1 is connected with the 6th pin of the ideal diode controller U1, one end of the resistor R1 and the negative electrode of the diode D2; the positive electrode of the diode D2 and the negative electrode of the diode D4 are grounded; the 3rd pin of the ideal diode controller U1 is connected with the positive electrode of the diode D3, the negative electrode of the diode D4, the 2nd pin of the ideal diode controller U1 and one end of the capacitor C1; and the 1st pin of the ideal diode controller U1 is connected with the other end of the resistor R1 and the other end of the capacitor C1.

[0009] Further, the soft protection module comprises electrolytic capacitor EC2, electrolytic capacitor EC3, capacitor C2, capacitor C3, MOS tube Q2, MOS tube Q3, resistors R2-R14, diodes D5-D10, current controller U2, interface M3, the current controller U2 adopts a model LM5069 chip; the interface M3 is connected with the battery module, the 4th pin of the interface M3 is connected with the 1st pin of the interface M2, the 2nd pin of the current controller U2, the negative electrode of the diode D5, the negative electrode of the diode D6, the negative electrode of the diode D7, one end of the resistor R2, one end of the resistor R3, one end of the capacitor C2 and one end of the resistor R9 are all connected and then connected to the battery 48V, the 1st pin of the interface M3 is connected with the positive electrode of the diode D5, one end of the electrolytic capacitor EC2 and the other end of the capacitor C2 are all connected and then grounded, the other end of the resistor R2 and the other end of the electrolytic capacitor EC2 are both connected and then connected to the battery 48V, the gate of the MOS tube is connected with one end of the resistor R14 and one end of the resistor R13, the other end of the resistor R9 is connected with one end of the resistor R10, the drain of the MOS tube Q2 and the 3rd pin of the current controller U2, the other end of the resistor R10 is connected with one end of the resistor R11, one end of the resistor R12 and the 4th pin of the current controller U2, the other end of the resistor R3 is connected with the drain of the MOS tube Q3 and one end of the resistor R4, the other end of the resistor R4 is connected with the positive electrode of the diode D7 and the 1st pin of the current controller U2, the gate of the MOS tube Q3 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the negative electrode of the diode D8 and the 10th pin of the current controller U2, the 9th pin of the current controller U2 is connected with the positive electrode of the diode D8 and one end of the resistor R6, the source of the MOS tube Q3 is connected with the other end of the resistor R6, one end of the electrolytic capacitor EC3 and the negative electrode of the diode D10, the other end of the electrolytic capacitor EC3 is connected with the positive electrode of the diode D10 and then grounded, the 8th pin of the current controller U2 is connected with the resistor R7 and then connected with the power supply 5V, the 7th pin of the current controller U2 is connected with one end of the resistor R8, the 6th pin of the current controller U2 is connected with one end of the capacitor C3, the 5th pin of the current controller U2 is connected with the other end of the capacitor C3, the resistor R8, the resistor R11, the resistor R12, the resistor R13, the positive electrode of the diode D9 and the source of the MOS tube Q2;

[0010] Further, the second ideal diode circuit comprises MOS tube Q4, ideal diode controller U3, capacitor C4, resistor R15, diodes D11-D13, the ideal diode controller U3 adopts model JW7260 chip;The 4th pin of the ideal diode controller U3 is connected with the source of the MOS tube Q4, the source of MOS tube Q3 and the negative pole of diode D11, the gate of the MOS tube Q3 is connected with the 5th pin of the ideal diode controller U3, the 3rd pin of the ideal diode controller U3 is connected with the positive pole of diode D11, the positive pole of diode D12, one end of capacitor C4 and the 2nd pin of the ideal diode controller U3, the 1st pin of the ideal diode controller U3 is connected with the other end of capacitor C4 and one end of resistor R15, the drain of the MOS tube Q4 is connected with the other end of resistor R15 and the negative pole of diode D13 and then grounded, the negative pole of diode D12 is connected with the positive pole of diode D13 and then grounded;

[0011] Further, the output module comprises interfaces J1 and J2 and electrolytic capacitors EC4-EC7, the interfaces J1 and J2 are used for connecting load devices, one end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J1 and the drain of MOS tube Q1, the other end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J2 and the drain of MOS tube Q4 and then grounded.

[0012] The utility model discloses the beneficial effect is, its through the first ideal diode circuit that sets up, can ensure that the battery module power supply will not influence AC / DC power module work when backfilling, through the first ideal diode circuit ensures that the current will not flow into the battery module when AC / DC power module works, and the battery module is carried out non-contact protection through the soft protection module, thereby can realize AC and DC backup seamless switching, and avoid the power failure situation, guarantee stable work, have good economic use value. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 It is the structural diagram of the utility model;

[0014] Figure 2 It is the circuit principle drawing of the utility model. DETAILED DESCRIPTION

[0015] As Figure 1 , Figure 2As shown, the utility model discloses a AC / DC power conversion protection device, it includes for the AC / DC power module that AC city power is converted to direct current and carries out output power supply, for the battery module of energy storage and discharge, for the charging module of battery module charging, the AC / DC power module, battery module, charging module all adopt the existing circuit module of above-mentioned;Charging module is according to the output voltage and current of battery module, provides charging, when battery module action, charging module stops charging, and in AC / DC power module work, charging module charges battery module, guarantees the battery of battery module is always in full power state;

[0016] It further comprises:

[0017] The first ideal diode circuit is connected with the AC / DC power module and the charging module, and is used for forward conduction when the input voltage is not less than the preset voltage.

[0018] The soft protection module is connected with the battery module and the charging module, and is used for protecting the battery module and preventing short circuit. That is, the resistor R3 inputs the detected current to the current controller U2, and when the detected current exceeds the set value, the MOS tube Q3 is closed. When the MOS tube Q3 is cut off, the output realizes the function of electronic fuse, and the circuit is protected without contact. When the set time is reached, the current controller U2 drives the voltage to open the MOS tube Q3 through the resistor R4, the circuit is re-powered, and the battery module is protected to prevent short circuit.

[0019] The second ideal diode circuit is connected with the soft protection module, and is used for preventing reverse current.

[0020] The output module is connected with the first ideal diode circuit and the second ideal diode circuit, and is used for outputting power to the load device.

[0021] The first ideal diode circuit comprises an ideal diode controller U1, an electrolytic capacitor EC1, a capacitor C1, a MOS tube Q1, a resistor R1, diodes D1-D4, an interface M1 and an interface M2. The ideal diode controller U1 is a chip of model JW7260. The diodes D1 and D2 are protection diodes to prevent voltage surge. The diodes D3 and D4 are reverse connection prevention diodes. The interface M1 is connected with an AC / DC power supply module, and the interface M2 is connected with a charging module. The 1 and 2 pins of the interface M1, one end of the electrolytic capacitor EC1, the negative electrode of the diode D1, the negative electrode of the diode D3, the source electrode of the MOS tube Q1, the 4 pin of the interface M2 and the 4 pin of the ideal diode controller U1 are all connected with each other and then connected to a power supply 48V. The 3 and 4 pins of the interface M1 and the other end of the electrolytic capacitor EC1 are both connected with the positive electrode of the diode D1 and then grounded. The gate electrode of the MOS tube Q1 is connected with the 5 pin of the ideal diode controller U1. The drain electrode of the MOS tube Q1, the 6 pin of the ideal diode controller U1, one end of the resistor R1 and the negative electrode of the diode D2 are all connected with each other. The positive electrode of the diode D2 and the negative electrode of the diode D4 are both grounded. The 3 pin of the ideal diode controller U1, the positive electrode of the diode D3, the negative electrode of the diode D4, the 2 pin of the ideal diode controller U1 and one end of the capacitor C1 are all connected with each other. The 1 pin of the ideal diode controller U1 and the other end of the resistor R1 and the other end of the capacitor C1 are all connected with each other.

[0022] The soft protection module comprises electrolytic capacitor EC2, electrolytic capacitor EC3, capacitor C2, capacitor C3, MOS tube Q2, MOS tube Q3, resistors R2-R14, diodes D5-D10, current controller U2, and interface M3. The current controller U2 is of model LM5069 chip. The interface M3 is connected with the battery module. The 4th pin of the interface M3, the 1st pin of the interface M2, the 2nd pin of the current controller U2, the negative electrode of the diode D5, the negative electrode of the diode D6, the negative electrode of the diode D7, one end of the resistor R2, one end of the resistor R3, one end of the capacitor C2, and one end of the resistor R9 are all connected and then connected to the battery 48V. The 1st pin of the interface M3, the positive electrode of the diode D5, one end of the electrolytic capacitor EC2, and the other end of the capacitor C2 are all connected and then grounded. The other end of the resistor R2 and the other end of the electrolytic capacitor EC2, and the positive electrode of the diode D6 are all connected and then connected to the battery 48V. The gate of the MOS tube is connected with the resistor R14 and one end of the resistor R13. The other end of the resistor R9, one end of the resistor R10, the drain of the MOS tube Q2, and the 3rd pin of the current controller U2 are all connected. The other end of the resistor R10, one end of the resistor R11, one end of the resistor R12, and the 4th pin of the current controller U2 are all connected. The other end of the resistor R3, the drain of the MOS tube Q3, and one end of the resistor R4 are all connected. The other end of the resistor R4, the positive electrode of the diode D7, and the 1st pin of the current controller U2 are all connected. The gate of the MOS tube Q3 is connected with one end of the resistor R5. The other end of the resistor R5, the negative electrode of the diode D8, and the 10th pin of the current controller U2 are all connected. The 9th pin of the current controller U2, the positive electrode of the diode D8, and one end of the resistor R6 are all connected. The source of the MOS tube Q3, the other end of the resistor R6, one end of the electrolytic capacitor EC3, and the negative electrode of the diode D10 are all connected. The other end of the electrolytic capacitor EC3 is connected with the positive electrode of the diode D10 and then grounded. The 8th pin of the current controller U2 is connected with the power supply 5V through the connecting resistor R7. The 7th pin of the current controller U2 is connected with one end of the resistor R8. The 6th pin of the current controller U2 is connected with one end of the capacitor C3. The 5th pin of the current controller U2 is connected with the other end of the capacitor C3, the resistor R8, the resistor R11, the resistor R12, the other end of the resistor R13, the positive electrode of the diode D9, and the source of the MOS tube Q2. The other end of the resistor R14 can be connected with an existing controller or an external switch for realizing the external opening and closing protection function.

[0023] The second ideal diode circuit comprises MOS tube Q4, ideal diode controller U3, capacitor C4, resistor R15, diodes D11-D13, the ideal diode controller U3 adopts a chip of model JW7260, diodes D10 and D13 are protection diodes for preventing voltage surges, diode D12 is an anti-reverse diode, the 4th pin of the ideal diode controller U3 is connected with the source of the MOS tube Q4, the source of the MOS tube Q3 and the negative pole of the diode D11, the gate of the MOS tube Q3 is connected with the 5th pin of the ideal diode controller U3, the 3rd pin of the ideal diode controller U3 is connected with the positive pole of the diode D11, the positive pole of the diode D12, one end of the capacitor C4 and the 2nd pin of the ideal diode controller U3, the 1st pin of the ideal diode controller U3 is connected with the other end of the capacitor C4 and one end of the resistor R15, the drain of the MOS tube Q4 is connected with the other end of the resistor R15 and the negative pole of the diode D13, and then grounded, and the negative pole of the diode D12 is connected with the positive pole of the diode D13 and then grounded.

[0024] The output module comprises interfaces J1 and J2 and electrolytic capacitors EC4-EC7, the interfaces J1 and J2 are used for connecting load devices, one end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J1 and the drain of the MOS tube Q1, and the other end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J2 and the drain of the MOS tube Q4 and then grounded.

[0025] The utility model discloses a can realize satisfying different equipment to the power supply demand of alternating current and direct current, realize the automatic switching of power supply, ensure the continuous stable operation of equipment, that is, realize seamless switching of alternating current and direct current when AC / DC power supply module or battery module works, avoid the situation of power failure, namely, using the first ideal diode circuit to ensure that the battery module power supply does not influence the work of AC / DC power supply module when reverse pumping, using the second ideal diode circuit to ensure that the current does not flow into the battery module when the AC / DC power supply module works, using the soft protection module to carry out non-contact protection to the direct current of battery module, and through the charging module, the battery module can be automatically charged in alternating current, and the battery is kept in full power state.

[0026] In the utility model, the first ideal diode circuit has unidirectional conductivity, can prevent current backflow, and when the current is greater than the preset current, the MOS tube Q1 is turned on, thereby reducing output loss and reducing heat generation, the second ideal diode circuit has unidirectional conductivity, prevents current backflow when the AC / DC power supply module works, and when the current is greater than the setting, the MOS tube Q4 is turned on, thereby reducing output loss and reducing heat generation, and through the cooperation of the two ideal diode circuits, seamless connection can be realized when any one way is powered off, and the equipment restart caused by short-time interruption voltage during switching can be reduced.

[0027] It will be obvious to a person skilled in the art that the application is not limited to the details of the above-described exemplary embodiments, but that the application can be implemented in other concrete forms without departing from the spirit or essential characteristics of the application. The embodiments should, therefore, be considered in all respects as illustrative and not restrictive, the scope of the application being indicated by the appended claims rather than by the above description, and all changes which come within the meaning and range of equivalents of the claims are therefore intended to be embraced therein. Any reference signs in the claims should not be construed as limiting the claims concerned.

[0028] Furthermore, it should be understood that although the present specification is described in terms of embodiments, not every embodiment according to the present specification needs to exhibit each and every characteristic specified in the present specification. The specification can also be described in terms of a single preferred embodiment, it being understood that this single preferred embodiment can exhibit not every aspect or feature of the present specification. The specification can also be described in terms of a generic statement that the disclosure can include one, some, or all embodiments, it being understood that this generic statement can be applicable to only a single aspect or feature of the present specification.

Claims

1. An AC / DC power supply conversion and protection device, comprising an AC / DC power supply module for converting AC mains power into DC power and outputting it, a battery module for energy storage and discharge, and a charging module for charging the battery module, characterized in that: It also includes: The first ideal diode circuit, with the AC / DC power module, charging module are connected, for input voltage is not less than the preset voltage when the forward conduction; Soft protection module, with the battery module, charging module are connected, for protecting the battery module, prevent short circuit; The second ideal diode circuit, with the soft protection module is connected, for preventing the generation of reverse current; Output module, with the first ideal diode circuit, second ideal diode circuit are connected, for power output to the load device.

2. The AC / DC power supply conversion protection device according to claim 1, characterized in that: The first ideal diode circuit includes ideal diode controller U1, electrolytic capacitor EC1, capacitor C1, MOS tube Q1, resistor R1, diode D1~D4, interface M1, interface M2, the ideal diode controller U1 uses model JW7260 chip;The interface M1 is connected with the AC / DC power module, the interface M2 is connected with the charging module;The 1, 2 feet of the interface M1 and one end of the electrolytic capacitor EC1, the negative electrode of diode D1, the negative electrode of diode D3, the source electrode of MOS tube Q1, the 4 feet of interface M2, the 4 feet of ideal diode controller U1 are connected and connected to the power supply 48V, the 3, 4 feet of the interface M1 and the other end of the electrolytic capacitor EC1, the positive electrode of diode D1 are connected and grounded, the gate electrode of the MOS tube Q1 is connected with the 5 feet of the ideal diode controller U1, the drain electrode of the MOS tube Q1 and the 6 feet of the ideal diode controller U1, one end of the resistor R1, the negative electrode of diode D2 are connected, the positive electrode of diode D2, the negative electrode of diode D4 are grounded, the 3 feet of the ideal diode controller U1 and the positive electrode of diode D3, the negative electrode of diode D4, the 2 feet of ideal diode controller U1, one end of capacitor C1 are connected, the 1 feet of the ideal diode controller U1 and the other end of the resistor R1, the other end of capacitor C1 are connected.

3. The AC / DC power supply conversion protection device according to claim 2, characterized in that: The soft protection module includes electrolytic capacitor EC2, electrolytic capacitor EC3, capacitor C2, capacitor C3, MOS tube Q2, MOS tube Q3, resistor R2-R14, diode D5-D10, current controller U2, interface M3, the current controller U2 adopts model LM5069 chip; the interface M3 is connected with the battery module, the 4th pin of the interface M3 is connected with the 1st pin of the interface M2, the 2nd pin of the current controller U2, the negative electrode of diode D5, the negative electrode of diode D6, the negative electrode of diode D7, one end of resistor R2, one end of resistor R3, one end of capacitor C2 and one end of resistor R9 are all connected with the battery 48V, the 1st pin of the interface M3 is connected with the positive electrode of diode D5, one end of electrolytic capacitor EC2 and the other end of capacitor C2 are all connected with the ground, the other end of resistor R2 and the other end of electrolytic capacitor EC2 are all connected with the battery 48V, the gate of the MOS tube is connected with one end of resistor R14 and one end of resistor R13, the other end of resistor R9 is connected with one end of resistor R10, the drain of MOS tube Q2 and the 3rd pin of current controller U2, the other end of resistor R10 is connected with one end of resistor R11, one end of resistor R12 and the 4th pin of current controller U2, the other end of resistor R3 is connected with the drain of MOS tube Q3 and one end of resistor R4, the other end of resistor R4 is connected with the positive electrode of diode D7 and the 1st pin of current controller U2, the gate of MOS tube Q3 is connected with one end of resistor R5, the other end of resistor R5 is connected with the negative electrode of diode D8 and the 10th pin of current controller U2, the 9th pin of current controller U2 is connected with the positive electrode of diode D8 and one end of resistor R6, the source of MOS tube Q3 is connected with the other end of resistor R6, one end of electrolytic capacitor EC3 and the negative electrode of diode D10, the other end of electrolytic capacitor EC3 is connected with the positive electrode of diode D10 and the ground, the 8th pin of current controller U2 is connected with resistor R7 and the power supply 5V, the 7th pin of current controller U2 is connected with one end of resistor R8, the 6th pin of current controller U2 is connected with one end of capacitor C3, the 5th pin of current controller U2 is connected with the other end of capacitor C3, resistor R8, resistor R11, resistor R12, the other end of resistor R13, the positive electrode of diode D9 and the source of MOS tube Q2.

4. The AC / DC power supply conversion protection device according to claim 3, characterized in that: The second ideal diode circuit comprises MOS tube Q4, ideal diode controller U3, capacitor C4, resistor R15, diodes D11-D13, the ideal diode controller U3 adopts chip JW7260; the 4th pin of the ideal diode controller U3 is connected with the source of the MOS tube Q4, the source of MOS tube Q3 and the negative pole of diode D11, the gate of the MOS tube Q3 is connected with the 5th pin of the ideal diode controller U3, the 3rd pin of the ideal diode controller U3 is connected with the positive pole of diode D11, the positive pole of diode D12, one end of capacitor C4 and the 2nd pin of the ideal diode controller U3, the 1st pin of the ideal diode controller U3 is connected with the other end of capacitor C4 and one end of resistor R15, the drain of the MOS tube Q4 is connected with the other end of resistor R15 and the negative pole of diode D13 and then grounded, the negative pole of diode D12 is connected with the positive pole of diode D13 and then grounded.

5. The AC / DC power supply conversion protection device according to claim 4, characterized in that: The output module comprises interfaces J1 and J2 and electrolytic capacitors EC4-EC7, the interfaces J1 and J2 are used for connecting load devices, one end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J1 and the drain of MOS tube Q1, the other end of the electrolytic capacitors EC4-EC7 is connected with the 1st, 2nd, 3rd and 4th pins of the interface J2 and the drain of MOS tube Q4 and then grounded.

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