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CN-224233391-U - Power module and electric energy meter for efficient management of battery power consumption

CN224233391UCN 224233391 UCN224233391 UCN 224233391UCN-224233391-U

Abstract

The utility model provides a power module and an electric energy meter for efficiently managing battery power consumption, wherein the power module comprises a V_DC output end, a DC-DC conversion circuit, a first switch piece, a second switch piece, a third switch piece and a battery, the V_DC output end is connected with the input end of the DC-DC conversion circuit, the output end of the DC-DC conversion circuit is divided into two paths, one path of the output end passes through the first switch piece and then serves as a VDD output end, the other path of the output end passes through the second switch piece and then serves as a VCC output end, the output end of the battery is connected to the VCC output end through the third switch piece, and the VCC output end is respectively connected with an MCU and an uninterruptible power utilization module. The utility model can realize the high-efficiency management of the battery power consumption of the electric energy meter, has lower cost, higher reliability and stability, and can greatly prolong the service lives of the battery and the electric energy meter.

Inventors

  • JI RAN
  • WU HAIQIANG
  • TAO BAORONG
  • HUANG JIANJUN
  • CHEN LIMING
  • WANG TAO

Assignees

  • 银河电力集团股份有限公司江西分公司
  • 江西银河表计有限公司

Dates

Publication Date
20260512
Application Date
20250529

Claims (7)

  1. 1. The power module for efficiently managing the power consumption of the battery is characterized by comprising a V_DC output end, a DC-DC conversion circuit, a first switch piece, a second switch piece, a third switch piece and the battery; The output end of the DC-DC conversion circuit is divided into two paths, one path passes through the first switch piece and then serves as a VDD output end, and the other path passes through the second switch piece and then serves as a VCC output end; the output end of the battery is connected to the VCC output end after passing through the third switch piece; And the VCC output end is respectively connected with the MCU and the uninterruptible power supply module.
  2. 2. The power module for efficient management of battery power consumption according to claim 1, wherein, the first switch piece, the second switch piece and the third switch piece are double diodes.
  3. 3. The power module for efficiently managing battery power consumption of claim 1, further comprising a mains input terminal, a transformer and a rectifying circuit connected in sequence, wherein the output terminal of the rectifying circuit comprises the V_DC output terminal, a communication voltage output terminal and an AVDD output terminal; the AVDD circuit comprises a communication voltage output end, an AVDD circuit and an analog circuit, wherein the communication voltage output end is connected with an external communication module, and the AVDD output end is connected with an external analog circuit.
  4. 4. The power module for efficient management of battery power consumption according to claim 3, wherein said communication voltage output terminal is a V485 output terminal, and said communication module is an RS485 circuit.
  5. 5. The power module for efficient management of battery power consumption according to claim 3, wherein said analog circuit is a metering circuit.
  6. 6. The electric energy meter is characterized by comprising the power module for efficiently managing the power consumption of the battery according to any one of the claims 1 to 5, and further comprising an MCU; The battery in the power supply module comprises a detection signal output end, and the detection signal output end is connected with the MCU.
  7. 7. The electric energy meter according to claim 6, further comprising a memory and a FLASH module, wherein the memory comprises a triode Q3 and a memory chip, and the FLASH module comprises a triode Q1, a voltage stabilizing chip and a FLASH chip; the emitter of the triode Q3 is connected with the VCC output end in the power supply module, the base of the triode Q3 is connected with the EE_Ctrl pin of the MCU, and the collector of the triode Q3 is connected with the memory chip; And the emitter of the triode Q1 is connected with the VCC output end in the power supply module, the base of the triode Q1 is connected with the FS_Ctrl pin of the MCU, and the collector of the triode Q1 is connected with the FLASH chip through the voltage stabilizing chip.

Description

Power module and electric energy meter for efficient management of battery power consumption Technical Field The utility model relates to the technical field of power management, in particular to a power module and an electric energy meter for efficiently managing battery power consumption. Background The intelligent electric energy meter is an electric energy meter with metering function, and can realize functions of remote meter reading, rate control, real-time recording of electricity consumption data, event recording, event reporting, fault diagnosis, power failure display and the like. The electric energy meter in the current market is provided with a battery, and when the electric energy meter fails, the battery is used for maintaining the functions of internal clock work, liquid crystal display, event recording, reporting of the failure event and the like. Because the life of electric energy meter is more than 10 years, and the internal battery of some electric energy meters is fixed on the PCB board and is not removable. Therefore, in order to ensure that the electric energy meter can rely on the battery to normally maintain the necessary functions of the electric energy meter after power failure, the battery consumption must be reduced to prolong the service life of the battery. In the prior art, the common practice of the high-end electric energy meter is to reduce the loss of battery energy through a combination mode of super capacitor and battery power supply. In the overseas ammeter market, the environment is complex, the technical requirements are numerous, various unstable technical requirement changes exist for customers, the cost price control requirement is high due to the fact that the number of the marks in the ammeter is large, and particularly the low-end single-phase ammeter is more strict in cost price control. Under the condition, if all phenotypes use super-capacitors in a large amount, the cost is increased, so that the product has no competitive advantage, and if a power failure battery is undervoltage in a large amount, the accuracy of an ammeter clock is seriously affected, and the problems of inaccurate meter charging rate, error event recording time and the like are caused. Therefore, it is important to develop an electric energy meter with ultra-low power consumption of a power-down battery. Disclosure of utility model The utility model aims to solve the technical problems that the power module and the electric energy meter for efficiently managing the power consumption of the battery can realize the efficient management of the power supply after power failure and have the advantages of low cost and ensuring the stable operation of the battery. In order to solve the technical problems, the first technical scheme adopted by the utility model is as follows: the power module for efficiently managing the power consumption of the battery comprises a V_DC output end, a DC-DC conversion circuit, a first switch piece, a second switch piece, a third switch piece and the battery; The output end of the DC-DC conversion circuit is divided into two paths, one path passes through the first switch piece and then serves as a VDD output end, and the other path passes through the second switch piece and then serves as a VCC output end; the output end of the battery is connected to the VCC output end after passing through the third switch piece; And the VCC output end is respectively connected with the MCU and the uninterruptible power supply module. Optionally, the first, second and third switching elements are dual diodes. Optionally, the device also comprises a mains supply input end, a transformer and a rectifying circuit which are connected in sequence, wherein the output end of the rectifying circuit comprises the V_DC output end, a communication voltage output end and an AVDD output end; the AVDD circuit comprises a communication voltage output end, an AVDD circuit and an analog circuit, wherein the communication voltage output end is connected with an external communication module, and the AVDD output end is connected with an external analog circuit. Optionally, the communication voltage output end is a V485 output end, and the communication module is an RS485 circuit. Optionally, the analog circuit is a metering circuit. The second technical scheme provided by the utility model is as follows: the electric energy meter comprises the power module for efficiently managing the power consumption of the battery, and also comprises an MCU; The battery in the power supply module comprises a detection signal output end, and the detection signal output end is connected with the MCU. Optionally, the device also comprises a memory and a FLASH module, wherein the memory comprises a triode Q3 and a memory chip, and the FLASH module comprises a triode Q1, a voltage stabilizing chip and a FLASH chip; the emitter of the triode Q3 is connected with the VCC output end in the power supply module, the bas