A hot-swap protection circuit for power storage module

Abstract

In an embodiment of the present invention, a hot-swap protection circuit for a power energy storage module is provided, which belongs to the field of avionics technology and includes an energy storage circuit, a hot-swap control circuit, a hot-swap detection circuit, and a charge-discharge circuit. The present invention reduces the instantaneous current between the charge-discharge circuit and the energy storage circuit through a switch delay circuit; or reduces the instantaneous current between the charge-discharge circuit and the energy storage circuit through a delay circuit after receiving hot-swap action information; the switch delay circuit delays the switch action by charging the internal capacitor of the delay circuit first, and after the transient peak current is suppressed, the switch is closed to connect the circuit. The technical effect is achieved that when the energy storage circuit and the charge-discharge circuit are plugged in and out, no arcing will occur on the connector or damage will be caused to the electrolytic capacitor.

Description

Technical Field

[0001] The present invention relates to the field of avionics technology, and in particular to a hot-swap protection circuit for a power supply energy storage module. Background Art

[0002] Airborne independent power supplies are widely used in helicopters, fixed-wing aircraft, large transport aircraft, drones and other aircraft. In existing energy storage circuits, batteries or supercapacitors are generally used as energy sources. The input and output ports of the charging and discharging circuits are connected to filter circuits such as electrolytic capacitors and other devices. Since the voltage of the charging and discharging circuit is inconsistent with the voltage of the energy storage circuit, when the power is plugged in and out, it will cause the energy storage module to discharge the electrolytic capacitors inside the charging and discharging circuit and the distributed capacitors on the cables, forming a short-term high current shock. This high current shock will cause arcing and burning of the connectors or damage to the electrolytic capacitors. Therefore, it is necessary to fundamentally suppress the high current generated when the energy storage circuit and the charging and discharging circuit are plugged in and out. Summary of the invention

[0003] In view of this, an embodiment of the present invention provides a hot-swap protection circuit for a power energy storage module, so that when the energy storage circuit and the charging and discharging circuit are plugged in and out, arcing of the connector will not be caused or damage to the electrolytic capacitor.

[0004] In order to achieve the above technical objectives, the specific technical solutions adopted by the present invention are:

[0005] A hot-swap protection circuit for a power energy storage module, comprising an energy storage circuit, a hot-swap control circuit, a hot-swap detection circuit and a charge-discharge circuit; the energy storage circuit is simultaneously connected to the hot-swap control circuit and the hot-swap detection circuit; the charge-discharge circuit is simultaneously connected to the hot-swap control circuit and the hot-swap detection circuit;

[0006] The hot-swap detection circuit is used to detect the voltage between the energy storage circuit and the charge-discharge circuit, analyze the voltage, generate hot-swap action information, and feed back the hot-swap action information to the hot-swap control circuit;

[0007] The hot-swap action information includes the connection between the charging and discharging circuit and the energy storage circuit, and the disconnection between the charging and discharging circuit and the energy storage circuit;

[0008] The hot-swap control circuit is used to reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the delay circuit when the charging and discharging circuit is connected to the energy storage circuit; or to reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the delay circuit after receiving the hot-swap action information.

[0009] Furthermore, the hot-swap control circuit includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a voltage regulator tube DZ1, a capacitor C1, a delay relay K1, a MOS tube VT1 and a diode V4; one end of the resistor R1 is connected to the positive output end of the energy storage circuit, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; one end of the resistor R2 is connected to the positive output end of the energy storage circuit, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; the anode of the voltage regulator tube DZ1 is connected to the positive output end of the energy storage circuit the negative output terminal of the energy storage circuit; the other excitation input terminal of the delay relay K1 is connected to the negative output terminal of the energy storage circuit; one end of the resistor R3 is connected to the positive output terminal of the energy storage circuit, and the other end is connected to the anode of the diode V4; one end of the resistor R4 is connected to the positive output terminal of the energy storage circuit, and the other end is connected to the anode of the diode V4; the anode and cathode of the diode V4 are connected to the source of the MOS tube VT1; the drain of the MOS tube VT1 is connected to the positive output terminal of the energy storage circuit, and the gate is connected to a controlled end interface of the delay relay K1; the other controlled end interface of the delay relay K1 is connected to the negative output terminal of the energy storage circuit.

[0010] Furthermore, the hot-swap detection circuit includes a voltage comparator D1, a MOS tube VT2 and a MOS tube VT3; one input port of the voltage comparator D1 is connected to the positive output end of the energy storage circuit, and the other input port is simultaneously connected to the source of the MOS tube VT1 and the positive electrode of the charge-discharge circuit; the output end of the voltage comparator D1 is simultaneously connected to the gate of the MOS tube VT2 and the gate of the MOS tube VT3; the drain of the MOS tube VT2 is connected to the negative output end of the energy storage circuit, and the source is connected to the source of the MOS tube VT3; the drain of the MOS tube VT3 is connected to the negative electrode of the charge-discharge circuit.

[0011] By adopting the above technical solution, the present invention has the following beneficial effects:

[0012] The present invention can reduce the damage caused by plugging and unplugging the current independent power supply energy storage circuit and the charging and discharging circuit, and can significantly improve the safety and reliability of the independent power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 This is a control principle block diagram of the hot-swap protection circuit of the energy storage module of the present invention;

[0015] Figure 2 The present invention is a circuit diagram of a specific implementation of the energy storage module plug-in protection circuit.

[0016] Among them: 1. Energy storage circuit; 2. Hot plug control circuit; 3. Hot plug detection circuit; 4. Charging and discharging circuit. DETAILED DESCRIPTION

[0017] The embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0018] The following describes the embodiments of the present invention through specific examples, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. The present invention can also be implemented or applied through other different specific embodiments, and the details in this specification can also be modified or changed in various ways based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. Based on the embodiments in the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work belong to the scope of protection of the present invention.

[0019] It should be noted that various aspects of the embodiments within the scope of the appended claims are described below. It should be apparent that the aspects described herein can be embodied in a wide variety of forms, and any specific structure and / or function described herein is merely illustrative. Based on the present invention, it should be understood by those skilled in the art that an aspect described herein can be implemented independently of any other aspect, and two or more of these aspects can be combined in various ways. For example, any number of aspects described herein can be used to implement the device and / or practice the method. In addition, other structures and / or functionalities other than one or more of the aspects described herein can be used to implement this device and / or practice this method.

[0020] It should also be noted that the illustrations provided in the following embodiments are only schematic illustrations of the basic concept of the present invention. The drawings only show components related to the present invention rather than being drawn according to the number, shape and size of components in actual implementation. In actual implementation, the type, quantity and proportion of each component may be changed arbitrarily, and the component layout may also be more complicated.

[0021] Additionally, in the following description, specific details are provided to facilitate a thorough understanding of the examples. However, it will be understood by those skilled in the art that the aspects described may be practiced without these specific details.

[0022] The embodiment of the present invention provides a hot-swap protection circuit for a power energy storage module, comprising an energy storage circuit 1, a hot-swap control circuit 2, a hot-swap detection circuit 3 and a charge-discharge circuit 4; the energy storage circuit 1 is simultaneously connected to the hot-swap control circuit 2 and the hot-swap detection circuit 3; the charge-discharge circuit 4 is simultaneously connected to the hot-swap control circuit 2 and the hot-swap detection circuit 3;

[0023] The hot-swap detection circuit 3 is used to detect the voltage between the energy storage circuit 1 and the charge-discharge circuit 4, analyze the voltage, generate hot-swap action information, and feed back the hot-swap action information to the hot-swap control circuit 2;

[0024] The hot-swap action information includes the connection between the charge-discharge circuit 4 and the energy storage circuit 1, and the disconnection between the charge-discharge circuit 4 and the energy storage circuit 1;

[0025] The hot-swap control circuit 2 is used to reduce the instantaneous current between the charging and discharging circuit 4 and the energy storage circuit 1 through the delay circuit when the charging and discharging circuit 4 and the energy storage circuit 1 are connected; or to reduce the instantaneous current between the charging and discharging circuit 4 and the energy storage circuit 1 through the delay circuit after receiving the hot-swap action information.

[0026] In this embodiment, if Figure 2 The hot-swap control circuit 2 shown includes a resistor R1, a resistor R2, a resistor R3, a resistor R4, a voltage regulator tube DZ1, a capacitor C1, a delay relay K1, a MOS tube VT1 and a diode V4; one end of the resistor R1 is connected to the positive output end of the energy storage circuit 1, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; one end of the resistor R2 is connected to the positive output end of the energy storage circuit 1, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; the anode of the voltage regulator tube DZ1 is connected to the energy storage circuit 1 The negative output terminal of the delay relay K1 is connected to the negative output terminal of the energy storage circuit 1; the other excitation input terminal of the delay relay K1 is connected to the negative output terminal of the energy storage circuit 1; one end of the resistor R3 is connected to the positive output terminal of the energy storage circuit 1, and the other end is connected to the anode of the diode V4; one end of the resistor R4 is connected to the positive output terminal of the energy storage circuit 1, and the other end is connected to the anode of the diode V4; the anode and cathode of the diode V4 are connected to the source of the MOS tube VT1; the drain of the MOS tube VT1 is connected to the positive output terminal of the energy storage circuit 1, and the gate is connected to a controlled end interface of the delay relay K1; the other controlled end interface of the delay relay K1 is connected to the negative output terminal of the energy storage circuit 1.

[0027] In this embodiment, if Figure 2The hot-swap detection circuit 3 shown includes a voltage comparator D1, a MOS tube VT2 and a MOS tube VT3; one input port of the voltage comparator D1 is connected to the positive output end of the energy storage circuit 1, and the other input port is simultaneously connected to the source of the MOS tube VT1 and the positive electrode of the charge-discharge circuit 4; the output end of the voltage comparator D1 is simultaneously connected to the gate of the MOS tube VT2 and the gate of the MOS tube VT3; the drain of the MOS tube VT2 is connected to the negative output end of the energy storage circuit 1, and the source is connected to the source of the MOS tube VT3; the drain of the MOS tube VT3 is connected to the negative electrode of the charge-discharge circuit 4.

[0028] In this embodiment, 10 supercapacitors are connected in series to form a capacitor group, and the capacitor groups can be connected in series, in parallel, or in a combination of parallel and series to form an energy storage circuit.

[0029] like Figure 1 As shown, the output end VOUT1 of the energy storage circuit 1 is connected to the input end VIN1 of the hot plug control circuit 2, the output end VOUT2 of the hot plug control circuit 2 is connected to the input end VIN2 of the charge and discharge circuit 4, and the output end VOUT3 of the charge and discharge circuit 4 is connected to the output power supply 5; the input current source 6 is connected to the input end VIN3 of the charge and discharge circuit 4, the output end VOUT4 of the charge and discharge circuit 4 is connected to the input end VIN4 of the hot plug control circuit 2, and the output end VOUT5 of the hot plug control circuit 2 is connected to the input end VIN5 of the energy storage circuit 1; the output end VOUT7 of the energy storage circuit 1 is connected to the input end VIN7 of the hot plug detection circuit 3, the output end VOUT8 of the charge and discharge circuit 4 is connected to the input end VIN6 of the hot plug detection circuit 3, and the output end VOUT6 of the hot plug detection circuit 3 is connected to the input end VIN8 of the hot plug control circuit 2.

[0030] like Figure 1 or Figure 2 As shown, the hot-swap control circuit 2 of the energy storage circuit 1 is used to reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the internal switch delay circuit when the charging and discharging circuit is connected to the energy storage circuit; or reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the delay circuit after receiving the hot-swap action information; the switch delay circuit delays the switch action by preferentially charging the internal capacitor of the delay circuit, and after the transient peak current is suppressed, the switch is closed to connect the circuit.

[0031] like Figure 1 or Figure 2 As shown, the hot-swap detection circuit 3 is used to detect whether the energy storage circuit 1 and the charge-discharge circuit 4 are hot-swapped, and generates corresponding hot-swap action information by detecting and analyzing the voltage value, and feeds back the hot-swap action information to the hot-swap control circuit; the hot-swap action information includes the connection of the charge-discharge circuit and the energy storage circuit, and the disconnection of the charge-discharge circuit and the energy storage circuit.

[0032] like Figure 2 As shown, the hot-swap control circuit 2 is composed of resistors R1, R2, a voltage regulator DZ1, and a capacitor C1 to form a switch delay circuit 5; when plugging occurs, the switch delay circuit 5 delays the action of the relay K1 to turn on the MOS tube VT1; the resistors R3 and R4 are current-limiting resistors for consuming peak current, and the diode V4 is used to prevent voltage backflow.

[0033] like Figure 2 As shown, the hot-swap detection circuit 3 is composed of a comparison circuit D1, MOS tubes VT2 and VT3, and monitors the voltage of the energy storage circuit 1 and the charge-discharge circuit 4 in real time; when the plug-in occurs, the MOS tube VT1 is not turned on, and the voltage at point B is lower than the voltage at point A, and the comparator D1 does not drive the MOS tubes VT2 and VT3 to turn on; after the MOS tube VT1 is turned on, the resistors R3 and R4 are short-circuited, and the voltages at points A and B are consistent, and the comparator D1 drives the MOS tubes VT2 and VT3 to turn on.

[0034] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A hot-swap protection circuit for a power storage module, characterized in that: It includes an energy storage circuit, a hot-plug control circuit, a hot-plug detection circuit and a charge-discharge circuit; the energy storage circuit is simultaneously connected to the hot-plug control circuit and the hot-plug detection circuit; the charge-discharge circuit is simultaneously connected to the hot-plug control circuit and the hot-plug detection circuit; The hot-swap detection circuit is used to detect the voltage between the energy storage circuit and the charge-discharge circuit, analyze the voltage, generate hot-swap action information, and feed back the hot-swap action information to the hot-swap control circuit; The hot-swap action information includes the connection between the charging and discharging circuit and the energy storage circuit, and the disconnection between the charging and discharging circuit and the energy storage circuit; The hot-swap control circuit is used to reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the delay circuit when the charging and discharging circuit and the energy storage circuit are connected; or reduce the instantaneous current between the charging and discharging circuit and the energy storage circuit through the delay circuit after receiving the hot-swap action information; The hot-swap control circuit comprises a resistor R1, a resistor R2, a resistor R3, a resistor R4, a voltage regulator tube DZ1, a capacitor C1, a delay relay K1, a MOS tube VT1 and a diode V4; one end of the resistor R1 is connected to the positive output end of the energy storage circuit, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; one end of the resistor R2 is connected to the positive output end of the energy storage circuit, and the other end is simultaneously connected to the cathode of the voltage regulator tube DZ1, an excitation input end of the delay relay K1 and one end of the capacitor C1; the anode of the voltage regulator tube DZ1 is connected to the negative electrode of the energy storage circuit. The other excitation input end of the delay relay K1 is connected to the negative output end of the energy storage circuit; one end of the resistor R3 is connected to the positive output end of the energy storage circuit, and the other end is connected to the anode of the diode V4; one end of the resistor R4 is connected to the positive output end of the energy storage circuit, and the other end is connected to the anode of the diode V4; the anode and cathode of the diode V4 are connected to the source of the MOS tube VT1; the drain of the MOS tube VT1 is connected to the positive output end of the energy storage circuit, and the gate is connected to a controlled end interface of the delay relay K1; the other controlled end interface of the delay relay K1 is connected to the negative output end of the energy storage circuit.

2. The hot-swap protection circuit for a power storage module according to claim 1, characterized in that: The hot-swap detection circuit comprises a voltage comparator D1, a MOS tube VT2 and a MOS tube VT3; one input port of the voltage comparator D1 is connected to the positive output end of the energy storage circuit, and the other input port is simultaneously connected to the source of the MOS tube VT1 and the positive electrode of the charge-discharge circuit; the output end of the voltage comparator D1 is simultaneously connected to the gate of the MOS tube VT2 and the gate of the MOS tube VT3; the drain of the MOS tube VT2 is connected to the negative output end of the energy storage circuit, and the source is connected to the source of the MOS tube VT3; the drain of the MOS tube VT3 is connected to the negative electrode of the charge-discharge circuit.

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