Ultra-high efficiency density power supply conversion module

Abstract

The utility model relates to a power supply conversion module, in particular to an ultra-high efficiency density power supply conversion module, which comprises an energy storage battery, a conversion unit and a module port. According to the utility model, after the power conversion assembly converts the electric energy according to the power demand of equipment connected with the power charging and discharging port, the charging and discharging efficiency is improved by the synchronous control circuit, and when the energy storage battery is under-voltage, the power on-off assembly cuts off the discharging loop of the energy storage battery and the power conversion assembly. And when the energy storage battery is charged through the charging port, the discharging loop is connected, so that an under-voltage fault of the power supply is avoided.

Description

Technical Field

[0001] The utility model relates to a power conversion, and specifically to a power conversion module with ultra-high efficiency density. Background Technique

[0002] A power conversion module is an electronic module with power conversion function. It processes the input power signal through the internal circuit and converts it into a stable and reliable power output that meets the requirements of the device. The power conversion module is used for the power conversion between the power grid and user equipment and is widely applied in the fields of industry, transportation, aviation, aerospace, medical treatment, etc.

[0003] For example, CN108551157A relates to a power conversion module, including: a high-power load switch, a battery power input interface connection, a high-power isolation power conversion module and a corresponding load power output interface, a power switch self-locking and interlocking circuit, and a voltage comparator; when the voltage input by the linear power conversion module is greater than the voltage input by the battery power, the voltage comparator sends a signal for disconnecting the circuit once to the power switch self-locking and interlocking circuit so as to cut off the power supply of the battery use protection circuit; a battery power indication circuit, which is used to give a corresponding power indication according to the battery power determined by the voltage comparator. This power conversion module can stop the battery output when the battery is under-voltage by setting a power switch self-locking and interlocking circuit, a linear power conversion module and a voltage comparator, etc., but it does not optimize the output efficiency of the power supply, resulting in unnecessary losses during power conversion.

[0004] In order to reduce the power loss during the conversion process, a power conversion module with ultra-high efficiency density is proposed. Content of the Utility Model

[0005] The purpose of the utility model is to provide a power conversion module with ultra-high efficiency density to solve the problems raised in the above background technique.

[0006] To achieve the above purpose, the utility model provides a power conversion module with ultra-high efficiency density, including a storage battery, a conversion unit and a module port. The conversion unit includes a power on-off component and a power conversion component. The module port includes a synchronous control circuit and a power charge and discharge port. The storage battery is connected to the power conversion component through the power on-off component. The power conversion component is bidirectionally connected to the synchronous control circuit, and the synchronous control circuit is connected to the power charge and discharge port;

[0007] The storage battery is charged and discharged through the power conversion component and the module port. When charging and discharging, the synchronous control circuit improves the charging and discharging efficiency, and the power on-off component controls the discharge of the storage battery.

[0008] As a further improvement of this technical solution, the energy storage battery is a ternary lithium battery.

[0009] As a further improvement of this technical solution, the power on / off component includes a low-voltage cut-off circuit and a high-voltage turn-on circuit. Among them, the low-voltage cut-off circuit and the high-voltage turn-on circuit are both arranged on the charge and discharge loop where the energy storage battery is connected to the power conversion component.

[0010] As a further improvement of this technical solution, the low-voltage cut-off circuit includes chip U1.

[0011] The SW pin of chip U3 is connected to inductor L3 and the negative electrode of diode D6, and inductor L3 is connected to capacitor C11 and the positive electrode of diode D4.

[0012] The GND pin of chip U3 is connected to resistor R21, the other end of capacitor C11, the positive electrode of diode D6 and grounded.

[0013] The FB pin of chip U3 is connected to resistors R9 and R10 and capacitor C9. Capacitor C9 is in parallel with resistor R10. Resistor R9 is grounded. Resistor R10 is connected to resistors R11, R12, transistor Q1B and the positive terminal of the energy storage battery. Resistor R11 is connected to resistor R14 and voltage regulator TL431. Resistor R14 is connected to transistor Q1B. Transistor Q1B is connected to the positive electrode of diode D3. Diode D3 is connected to the power conversion component. Resistor R12 is connected to voltage regulator TL1 and resistor R20. Resistor R20 is connected to voltage regulator TL1 and grounded.

[0014] The CS pin of chip U3 is connected to the other end of resistor R21 and the negative terminal of the energy storage battery.

[0015] As a further improvement of this technical solution, the high-voltage turn-on circuit includes relay K and transformer T.

[0016] One end of relay K is connected to the negative electrode of diode VD1, resistor R1, inductor L3, ammeters V1, V2, light-emitting diode LED and the energy storage battery. The other end of relay K is connected to the collector of transistor VT and the positive electrode of diode VD1.

[0017] One end of the primary winding of transformer T is connected to the normally open contact K1-1 of relay K. The other end of the primary winding of transformer T is connected to the power supply. One end of the secondary winding of transformer T is connected to the positive electrode of diode VD2. The other end of the secondary winding of transformer T is connected to the positive electrode of diode VD3. The negative electrode of diode VD3 is connected to the negative electrode of diode VD2, the other end of ammeter V2, the other end of inductor L3 and the other end of light-emitting diode LED.

[0018] The base of the triode VT is connected to the potentiometer RP. The potentiometer RP is connected to the other end of the resistor R1. The emitter of the triode VT is connected to the other end of the potentiometer RP and the other end of the ammeter V1.

[0019] As a further improvement of this technical solution, the synchronous control circuit includes a comparator U2A.

[0020] Pin 2 of the comparator U2A is connected to the resistor R17. The resistor R17 is connected to pin 12 of the comparator U2A and to the Vcc terminal.

[0021] Pin 3 of the comparator U2A is connected to the capacitor C19 and grounded.

[0022] Pin 4 of the comparator U2A is connected to the resistor R15 and to the resistor R22. The resistor R15 is connected to the GATE terminal. The resistor R22 is connected to the capacitor C17 and to the resistor R13. The capacitor C17 is connected to the resistor R24, the diode Q5 and grounded. The resistor R13 is connected to the diode Q5 and to the other end of the resistor R24. The diode Q5 is connected to the resistor R23. The resistor R23 is connected to the Vcc terminal.

[0023] Pin 5 of the comparator U2A is connected to the resistor R16. The resistor R16 is connected to the other end of the capacitor C19 and to the Vin terminal.

[0024] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0025] In this ultra-high efficiency density power conversion module, after the power conversion component converts the electric energy according to the power consumption demand of the device connected to the power charging and discharging port, the synchronous control circuit improves the charging and discharging efficiency. When the energy storage battery is under-voltage, the power on-off component cuts off the discharge circuit of the energy storage battery and the power conversion component. After the energy storage battery is fully charged through the charging port, the discharge circuit is reconnected to avoid the power supply from having an under-voltage fault. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0027] Figure 2 It is a circuit diagram of low-voltage turn-off of the present utility model;

[0028] Figure 3 It is a circuit diagram of high-voltage turn-on of the present utility model;

[0029] Figure 4 It is a circuit diagram of synchronous control of the present utility model. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0030] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0031] Embodiment 1

[0032] Please refer to Figures 1 - 4 As shown, this embodiment provides a power conversion module with ultra-high efficiency density, including an energy storage battery, a conversion unit, and a module port. The conversion unit includes a power on / off component and a power conversion component. The module port includes a synchronous control circuit and a power charge / discharge port. The energy storage battery is connected to the power conversion component through the power on / off component. The power conversion component is bidirectionally connected to the synchronous control circuit, and the synchronous control circuit is connected to the power charge / discharge port.

[0033] The energy storage battery is charged and discharged through the power conversion component and the module port. During charging and discharging, the synchronous control circuit improves the charging and discharging efficiency, and the power on / off component controls the discharge of the energy storage battery.

[0034] Principle: When the energy storage battery discharges, it is transmitted to the power conversion component through the power on / off component. After the power conversion component converts the electric energy according to the power consumption requirements of the device connected to the power charge / discharge port, the synchronous control circuit improves the charging and discharging efficiency. When the energy storage battery is under-voltage, the power on / off component cuts off the discharge circuit between the energy storage battery and the power conversion component. After the energy storage battery is fully charged through the charging port, the discharge circuit is reconnected to avoid power under-voltage faults.

[0035] The power conversion component in this embodiment is an inverter that can achieve DC-AC conversion and can also achieve AC-DC conversion, thus facilitating the charging and discharging of the energy storage battery;

[0036] The power charge / discharge port is a plug-in panel provided with multiple interfaces such as USB.

[0037] Furthermore, the power on / off component includes a low-voltage cut-off circuit and a high-voltage turn-on circuit. Among them, the low-voltage cut-off circuit and the high-voltage turn-on circuit are both arranged on the charge / discharge circuit of the energy storage battery connecting to the power conversion component.

[0038] Among them, the low-voltage cut-off circuit includes chip U1.

[0039] The SW pin of chip U3 is connected to inductor L3 and the cathode of diode D6. Inductor L3 is connected to capacitor C11 and the anode of diode D4.

[0040] The GND pin of chip U3 is connected to resistor R21, the other end of capacitor C11, the anode of diode D6 and grounded.

[0041] The FB pin of chip U3 is connected to resistors R9 and R10 and capacitor C9 in parallel. Capacitor C9 is in parallel with resistor R10. Resistor R9 is grounded. Resistor R10 is connected to resistors R11, R12, transistor Q1B and the positive terminal of the energy storage battery. Resistor R11 is connected to resistor R14 and voltage regulator TL431 in parallel. Resistor R14 is connected to transistor Q1B. Transistor Q1B is connected to the positive electrode of diode D3. Diode D3 is connected to the power conversion component. Resistor R12 is connected to voltage regulator TL1 and resistor R20 in parallel. Resistor R20 is connected to voltage regulator TL1 and grounded;

[0042] The CS pin of chip U3 is connected to the other end of resistor R21 and the negative terminal of the energy storage battery.

[0043] Chip U3 in this circuit is an XL4001 chip. By setting the resistance values of resistors R12 and R20, the low-voltage protection value is adjusted by voltage division. When the energy storage battery continuously discharges to a voltage value lower than the set low-voltage protection value, voltage regulator TL431 will cut off, turn off transistor Q1B, thereby stopping the output of the energy storage battery and achieving low-voltage protection.

[0044] The high-voltage turn-on circuit includes relay K and transformer T.

[0045] One end of relay K is connected to the negative electrode of diode VD1, resistor R1, inductor L3, ammeters V1, V2, light-emitting diode LED and the energy storage battery in parallel. The other end of relay K is connected to the collector of transistor VT and the positive electrode of diode VD1;

[0046] One end of the main winding of transformer T is connected to the normally open contact K1-1 of relay K. The other end of the main winding of transformer T is connected to the power supply. One end of the secondary winding of transformer T is connected to the positive electrode of diode VD2. The other end of the secondary winding of transformer T is connected to the positive electrode of diode VD3. The negative electrode of diode VD3 is connected to the negative electrode of diode VD2, the other end of ammeter V2, the other end of inductor L3 and the other end of light-emitting diode LED;

[0047] The base of transistor VT is connected to potentiometer RP. Potentiometer RP is connected to the other end of resistor R1. The emitter of transistor VT is connected to the other end of potentiometer RP and the other end of ammeter V1.

[0048] In this circuit, the target value is set by adjusting the resistance value of potentiometer RP. When the energy storage battery is charged to the target voltage value, relay K is energized to make the normally open contact K1-1 closed to connect the charge and discharge circuit of the energy storage battery to the power conversion component.

[0049] In addition, the synchronous control circuit includes comparator U2A.

[0050] Pin 2 of comparator U2A is connected to resistor R17. Resistor R17 is connected to pin 12 of comparator U2A and Vcc terminal in parallel.

[0051] Pin 3 of comparator U2A is connected to capacitor C19 and grounded.

[0052] Pin 4 of comparator U2A is connected to resistor R15 and also connected to resistor R22. Resistor R15 is connected to the GATE terminal. Resistor R22 is connected to capacitor C17 and also connected to resistor R13. Capacitor C17 is connected to resistor R24, diode Q5 and grounded. Resistor R13 is connected to diode Q5 and also connected to the other end of resistor R24. Diode Q5 is connected to resistor R23. Resistor R23 is connected to the Vcc terminal.

[0053] Pin 5 of comparator U2A is connected to resistor R16. Resistor R16 is connected to the other end of capacitor C19 and also connected to the Vin terminal.

[0054] In this circuit, the comparator U2A and its related devices control the loop of the power conversion component and the power charging and discharging port. Under different load conditions, feedback control is carried out to keep the loop output constant, reduce the energy loss of the circuit, and thus improve the output efficiency of the power supply.

[0055] In a specific use of a high-efficiency density power conversion module of this embodiment, a ternary lithium battery with a high energy density is used as the energy storage battery. When the energy storage battery discharges, it is transmitted to the power conversion component through the power on-off component. After the power conversion component converts the electric energy according to the power consumption requirements of the device connected to the power charging and discharging port, the synchronous control circuit improves the charging and discharging efficiency. When the energy storage battery is under-voltage, the voltage value is lower than the set low-voltage protection value, the voltage regulator TL431 will cut off, turning off the transistor Q1B, thereby stopping the output of the energy storage battery, realizing low-voltage protection, and the power on-off component cuts off the discharge loop of the energy storage battery and the power conversion component. When the energy storage battery is fully charged through the charging port, the relay K is energized to make the normally open contact K1-1 closed to connect the charging and discharging loop of the energy storage battery to the power conversion component, avoiding the power supply from having an under-voltage fault.

[0056] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. The above embodiments and the descriptions in the specification are only preferred examples of the present invention and do not limit the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the present invention claimed. The scope of protection claimed by the present invention is defined by the appended claims and their equivalents.

Claims

1. A power conversion module with ultra-high efficiency density, characterized in that: It includes an energy storage battery, a conversion unit, and a module port. The conversion unit includes a power on / off component and a power conversion component. The module port includes a synchronous control circuit and a power charging / discharging port. The energy storage battery is connected to the power conversion component through the power on / off component. The power conversion component is bidirectionally connected to the synchronous control circuit, and the synchronous control circuit is connected to the power charging / discharging port; The energy storage battery charges and discharges through the power conversion component and the module port. During charging and discharging, the synchronous control circuit improves the charging and discharging efficiency, and the power on / off component controls the discharge of the energy storage battery.

2. The ultra-high efficiency density power conversion module according to claim 1, wherein: The energy storage battery is a ternary lithium battery.

3. The ultra-high efficiency density power conversion module according to claim 1, wherein: The power on / off component includes a low-voltage cut-off circuit and a high-voltage turn-on circuit. Among them, the low-voltage cut-off circuit and the high-voltage turn-on circuit are both arranged on the charging and discharging circuit where the energy storage battery is connected to the power conversion component.

4. The ultra-high efficiency density power conversion module according to claim 1, wherein: The low-voltage cut-off circuit includes chip U1. The SW pin of chip U3 is connected to inductor L3 and the negative pole of diode D6. The inductor L3 is connected to capacitor C11 and the positive pole of diode D4; The GND pin of chip U3 is connected to resistor R21, the other end of capacitor C11, the positive pole of diode D6 and grounded; The FB pin of chip U3 is connected to resistors R9, R10 and capacitor C9. The capacitor C9 is in parallel with resistor R10. The resistor R9 is grounded. The resistor R10 is connected to resistors R11, R12, transistor Q1B and the positive terminal of the energy storage battery. The resistor R11 is connected to resistor R14 and voltage regulator TL431. The resistor R14 is connected to transistor Q1B. The transistor Q1B is connected to the positive pole of diode D3. The diode D3 is connected to the power conversion component. The resistor R12 is connected to voltage regulator TL1 and resistor R20. The resistor R20 is connected to voltage regulator TL1 and grounded; The CS pin of chip U3 is connected to the other end of resistor R21 and the negative terminal of the energy storage battery.

5. The ultra-high efficiency density power conversion module according to claim 1, characterized in that: The high-voltage turn-on circuit includes relay K and transformer T. One end of relay K is connected to the negative pole of diode VD1, resistor R1, inductor L3, ammeters V1, V2, light-emitting diode LED and the energy storage battery. The other end of relay K is connected to the collector of transistor VT and the positive pole of diode VD1; One end of the main winding of transformer T is connected to the normally open contact K1-1 of relay K. The other end of the main winding of transformer T is connected to the power supply. One end of the secondary winding of transformer T is connected to the positive pole of diode VD2. The other end of the secondary winding of transformer T is connected to the positive pole of diode VD3. The negative pole of diode VD3 is connected to the negative pole of diode VD2, the other end of ammeter V2, the other end of inductor L3 and the other end of light-emitting diode LED; The base of transistor VT is connected to potentiometer RP. The potentiometer RP is connected to the other end of resistor R1. The emitter of transistor VT is connected to the other end of potentiometer RP and the other end of ammeter V1.

6. The ultra-high efficiency density power conversion module according to claim 1, characterized in that: The synchronous control circuit includes comparator U2A. Pin 2 of the comparator U2A is connected to resistor R17, and the resistor R17 is connected to pin 12 of the comparator U2A and to the Vcc terminal; Pin 3 of the comparator U2A is connected to capacitor C19 and grounded; Pin 4 of the comparator U2A is connected to resistor R15 and to resistor R22. The resistor R15 is connected to the GATE terminal. The resistor R22 is connected to capacitor C17 and to resistor R13. The capacitor C17 is connected to resistor R24, diode Q5 and grounded. The resistor R13 is connected to the diode Q5 and to the other end of the resistor R24. The diode Q5 is connected to resistor R23, and the resistor R23 is connected to the Vcc terminal; Pin 5 of the comparator U2A is connected to resistor R16, and the resistor R16 is connected to the other end of the capacitor C19 and to the Vin terminal.

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