CN215733621U

CN215733621U - Super capacitor module for standby power of transformer area monitoring equipment

Info

Publication number: CN215733621U
Application number: CN202120831939.8U
Authority: CN
Inventors: 黎毅辉; 范律; 肖林松; 李俊; 汤可; 王�锋; 陈岗
Original assignee: Willfar Information Technology Co Ltd
Current assignee: Willfar Information Technology Co Ltd
Priority date: 2021-04-22
Filing date: 2021-04-22
Publication date: 2022-02-01
Anticipated expiration: 2031-04-22

Abstract

The utility model relates to a super capacitor module for standby power of a platform area monitoring device, which comprises a charging power supply input port, a constant-current charging DC/DC circuit, a super capacitor combination, a boosting discharging DC/DC circuit and a system power supply output port, wherein the charging power supply input port, the constant-current charging DC/DC circuit, the super capacitor combination, the boosting discharging DC/DC circuit and the system power supply output port are sequentially connected; the power failure detection circuit is connected with the boosting and discharging DC/DC circuit and outputs an enabling control signal to the boosting and discharging DC/DC circuit. According to the super capacitor module, an independent power failure detection circuit is added in the conventional super capacitor module, and is used separately from a main system power failure signal, so that the hidden trouble of misoperation caused by multiplexing multiple parts of the system power failure detection signal is avoided. Meanwhile, the external interface of the super capacitor module is simplified, and the power-down action voltage can be freely adjusted.

Description

Super capacitor module for standby power of transformer area monitoring equipment

Technical Field

The utility model relates to the field of intelligent distribution network instruments and meters, in particular to a super capacitor module for standby power of distribution room monitoring equipment.

Background

At present, a super capacitor and a module combined with the super capacitor are widely applied to a standby power scheme of a platform area monitoring device, and mainly comprise three main processes of charging, discharging and voltage sharing. Fig. 4 is a circuit diagram of a conventional super capacitor module, which includes a charging circuit composed of JW5018 constant current DC/DC chips, a super capacitor voltage-sharing circuit composed of TLVH431 and IRLML6401, a combination of two super capacitors connected in series, and a boost discharging circuit composed of TPS61089 boost DC/DC chips. The whole super capacitor module comprises three input ports of a charging power supply VIN, a charging control CHARG _ CTRL and a power failure control FL _ CTRL and a system power supply output VOUT.

Fig. 5 is a power down detection circuit diagram for use in a system using a super capacitor module. In fig. 5, a watchdog circuit composed of a MAX706 chip or the like monitors a system power supply voltage, a system battery fault, and an operating state of a microprocessor unit (MPU) or a microcontroller unit (MCU), and generates a charge control CHARG _ CTRL signal and a power down control FL _ CTRL signal.

Fig. 6 is a diagram of another power down detection circuit used in a system using a super capacitor module, which uses a R3111H421A voltage detection chip to form a system power down detection circuit that generates a charge control CHARG _ CTRL signal and a power down control FL _ CTRL signal.

As can be seen from fig. 4, 5 and 6, since the two power down detection circuits use the system power down signal, the external interface of the super capacitor module is complex, and the super capacitor module at least includes VIN, VOUT, GND, the power down control signal, V3P3, and the like. In the super capacitor module discharging circuit, a boost DC/DC chip is generally used to increase the output voltage (for example, a boost discharging circuit composed of a TPS61089 boost DC/DC chip in fig. 4). The boost DC/DC chip used by the super capacitor module is provided with an enable control pin, such as the 7 th pin EN in the boost DC/DC chip D2 in FIG. 4. The conventional design usually enables the boost DC/DC chip directly, or introduces a power-down control signal used by the system to enable and control the boost DC/DC chip, and both the two methods have certain defects: (1) the boost DC/DC is directly enabled, abnormal starting of the boost DC/DC is easily caused, and the front-end super capacitor is slowly charged or cannot be fully charged. (2) A power failure control signal of a system is introduced to control a boost DC/DC enabling pin, and due to the fact that the introduced power failure detection signal is from a main system, the signal is multiplexed at multiple positions, and misoperation of other functions needing the power failure detection signal is easily caused, for example, a metering MCU (microprogrammed control unit) possibly reports power failure abnormally, and the main system reports power failure abnormally. And the external interface of the super capacitor module is complex, and the super capacitor module has no portability, poor portability and poor universality.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a super capacitor module for standby power of a platform area monitoring device, which can flexibly adjust the power failure action voltage and simplify the external interface.

In order to solve the technical problem, the utility model provides a super capacitor module for standby power of a platform area monitoring device, which comprises a charging power supply input port, a constant current charging DC/DC circuit, a super capacitor combination, a boosting and discharging DC/DC circuit and a system power supply output port, wherein the charging power supply input port, the constant current charging DC/DC circuit, the super capacitor combination, the boosting and discharging DC/DC circuit and the system power supply output port are sequentially connected; the power failure detection circuit is connected with the boosting and discharging DC/DC circuit and outputs an enabling control signal to the boosting and discharging DC/DC circuit.

Furthermore, the power failure detection circuit in the super capacitor module for power backup of the platform area monitoring equipment comprises a three-terminal adjustable voltage stabilizing chip V2, four resistors R1, R2, R3, R4 and a diode V1, wherein the anode of the three-terminal adjustable voltage stabilizing chip V2 is grounded, the cathode of the three-terminal adjustable voltage stabilizing chip V2 is connected with the anode of the diode V1 and is connected with the system power supply output port VOUT through the resistor R2, the reference terminal of the three-terminal adjustable voltage stabilizing chip V2 is grounded through the resistor R3 and is connected with the charging power supply input port VIN through the resistor R1, and the cathode of the diode V1 is connected with the output terminal CTRL of the power failure detection circuit and is grounded through the resistor R4.

Furthermore, the super capacitor module for the power backup of the platform area monitoring equipment further comprises two reverse-filling prevention circuits, one of the two reverse-filling prevention circuits is arranged between the constant-current charging DC/DC circuit and the super capacitor combination, the other two reverse-filling prevention circuits is arranged between the boosting discharging DC/DC circuit and the system power supply output port, and the other two reverse-filling prevention circuits is connected with the power failure detection circuit and receives the enabling control signal output by the power failure detection circuit.

Furthermore, the super capacitor combination in the stand-by super capacitor module of the platform area monitoring equipment comprises a voltage equalizing circuit.

Furthermore, the diode V1 of the power failure detection circuit in the power backup super capacitor module of the platform area monitoring device is a diode with microampere leakage current.

Further, the forward conduction current of the diode V1 is not more than 0.5V.

Further, the diode V1 is a fast recovery diode.

Furthermore, the three-terminal adjustable voltage regulation chip V2 is an AZ431 chip.

The utility model has the beneficial effects that: an independent power failure detection circuit is added in the conventional super capacitor module and is separately used with a main system power failure signal, so that the hidden trouble of malfunction caused by multiplexing multiple system power failure detection signals is avoided. Meanwhile, the external interface of the super capacitor module can be fully simplified, the power-down action voltage can be freely adjusted, and the on-off control of a boost DC/DC chip enable control and an anti-reverse-filling circuit by a power-down signal can be automatically realized.

Drawings

Fig. 1 is a structural diagram of a stand-by super capacitor module of a station area monitoring device according to an embodiment of the present invention;

FIG. 2 is a circuit diagram of one embodiment of the power down detection circuit of FIG. 1;

fig. 3 is a circuit diagram of a super capacitor module for standby power of a distribution room monitoring apparatus according to an embodiment of the present invention;

FIG. 4 is a circuit diagram of a conventional super capacitor module;

FIG. 5 is a power down detection circuit diagram for use in a system using super capacitor modules;

fig. 6 is a diagram of another power down detection circuit used in a system using a super capacitor module.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

As shown in fig. 1, a super capacitor module for monitoring standby power of a device includes a charging power input port 101, a constant current charging DC/DC circuit 102, a super capacitor assembly 104, a boost discharging DC/DC circuit 106, and a system power supply output port 109, where the charging power input port 101, the constant current charging DC/DC circuit 102, the super capacitor assembly 104, the boost discharging DC/DC circuit 106, and the system power supply output port 109 are sequentially connected; the power down detection circuit 108 is further included, and the power down detection circuit 108 is connected to the boost discharging DC/DC circuit 106 and outputs an enable control signal to the boost discharging DC/DC circuit 106. The super capacitor module for the standby power of the platform area monitoring equipment further comprises an anti-reverse-filling circuit 103 and an anti-reverse-filling circuit 104, wherein the anti-reverse-filling circuit 103 is arranged between the constant-current charging DC/DC circuit 102 and the super capacitor assembly 104, the two anti-reverse-filling circuits 107 are arranged between the boosting discharging DC/DC circuit 106 and the system power supply output port 109, and the two anti-reverse-filling circuits 107 are connected with the power failure detection circuit 108 and receive the enabling control signal output by the power failure detection circuit 108. The supercapacitor pack 104 also comprises a voltage grading circuit 105.

As shown in fig. 2, the power-down detection circuit in fig. 1 includes a three-terminal adjustable regulator chip V2, four resistors R1, R2, R3, R4, and a diode V1, an anode of the three-terminal adjustable regulator chip V2 is grounded, a cathode of the three-terminal adjustable regulator chip V2 is connected to an anode of the diode V1 and to the system power supply output port VOUT through the resistor R2, a reference terminal of the three-terminal adjustable regulator chip V2 is grounded through the resistor R3 and to the charging power supply input port VIN through the resistor R1, and a cathode of the diode V1 is connected to the output terminal CTRL of the power-down detection circuit and to ground through the resistor R4. As a further optimization of the above scheme, the diode V1 is a fast recovery diode with microampere leakage current and forward conduction current of not more than 0.5V. As a further optimization of the above scheme, the three-terminal adjustable voltage regulation chip V2 is an AZ431 chip. The working process of the power failure detection circuit is as follows: the monitoring threshold of the input voltage VIN is set by adjusting the resistor R1 and the resistor R3, the monitoring threshold can be normally set at 10.5V-11V for monitoring, when the input voltage VIN is lower than the monitored threshold voltage, the output of the three-terminal adjustable voltage stabilizing chip V2 is in an open-drain output state, at the moment, the output of the three-terminal adjustable voltage stabilizing chip V2 is pulled high by the output voltage VOUT through the resistor R2, and the CTRL signal level is set within the allowable range (not higher than 6.0V) of the enable pin EN of the boosting DC/DC chip through the voltage division relation of the resistor R2 and the resistor R4. When the input voltage VIN is higher than the monitored threshold voltage, the output of the three-terminal adjustable voltage regulation chip V2 is at a low level (about 0.6V), and after passing through the diode V1, the CTRL level is further reduced to be below 0.4V, and VENL below the highest level that meets the logic low level requirement is less than or equal to 0.4V (i.e., the highest allowed logic low level is not exceeded, and when the level is exceeded, the three-terminal adjustable voltage regulation chip enters an indeterminate level state or is determined as a high level).

As shown in fig. 3, the whole power backup super capacitor module circuit for the platform area monitoring equipment comprises a charging circuit composed of JW5028 constant current DC/DC chips, an anti-reverse-charging circuit composed of IRLML6402 and the like, a super capacitor voltage-sharing circuit composed of TLVH431 and IRLML6401 and the like, a combination of two 160F super capacitors connected in series, a boost discharging circuit composed of SGM8610 boost DC/DC chips and the like, and a power failure detection circuit in fig. 2. The whole super capacitor module only has three external ports of a charging power supply VIN, a system power supply output VOUT and a ground port GND.

The embodiment of the utility model can carry out sequence adjustment, combination and deletion according to actual needs.

The embodiments describe the present invention in detail, and the specific embodiments are applied to illustrate the principle and the implementation of the present invention, and the above embodiments are only used to help understand the method and the core idea of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, there may be variations in the specific embodiments and the application scope, and in summary, the content of the present specification should not be construed as a limitation to the present invention.

Claims

1. The super-capacitor module for the standby power of the platform area monitoring equipment comprises a charging power supply input port, a constant-current charging DC/DC circuit, a super-capacitor combination, a boosting discharging DC/DC circuit and a system power supply output port, wherein the charging power supply input port, the constant-current charging DC/DC circuit, the super-capacitor combination, the boosting discharging DC/DC circuit and the system power supply output port are sequentially connected.

2. The station monitoring equipment power supply super capacitor module set according to claim 1, wherein the power failure detection circuit comprises a three-terminal adjustable voltage regulation chip (V2), four resistors (R1, R2, R3, R4) and a diode (V1), an anode of the three-terminal adjustable voltage regulation chip (V2) is grounded, a cathode of the three-terminal adjustable voltage regulation chip (V2) is connected to an anode of the diode (V1) and to the system power supply output port (VOUT) through the resistor (R2), a reference terminal of the three-terminal adjustable voltage regulation chip (V2) is grounded through the resistor (R3) and to the charging power supply input port (VIN) through the resistor (R1), and a cathode of the diode (V1) is connected to the output terminal (CTRL) of the power failure detection circuit and to the ground through the resistor (R4).

3. The backup super-capacitor module of the platform monitoring equipment according to claim 1, further comprising two reverse-filling prevention circuits, wherein one of the two reverse-filling prevention circuits is disposed between the constant-current charging DC/DC circuit and the super-capacitor assembly, the other two reverse-filling prevention circuits is disposed between the boost discharging DC/DC circuit and the system power supply output port, and the other two reverse-filling prevention circuits is connected to the power failure detection circuit and receives the enable control signal output by the power failure detection circuit.

4. The spare power super capacitor module of the platform area monitoring equipment according to claim 1, wherein the super capacitor assembly comprises a voltage equalizing circuit.

5. The spare power super capacitor module of the platform area monitoring equipment according to claim 2, wherein the diode (V1) is a diode with microampere leakage current.

6. The spare power super capacitor module of the platform area monitoring equipment according to claim 2, wherein the forward conduction current of the diode (V1) is not more than 0.5V.

7. The power backup super capacitor module of the platform monitoring equipment according to claim 2, wherein the diode (V1) is a fast recovery diode.

8. The spare power super capacitor module of the platform area monitoring equipment according to claim 2, wherein the three-terminal adjustable voltage regulation chip (V2) is an AZ431 chip.