Battery power supply circuit in wireless temperature measuring device and power supply method

By designing the main power supply module and the time-increasing power supply module in the wireless temperature measurement device, combined with the oscillation boost sub-module, the problem of traditional battery power supply circuits not working properly at low voltages is solved, and a longer power supply time and higher economicality is achieved.

CN119696088AActive Publication Date: 2025-03-25STATE GRID HUNAN ELECTRIC POWER COMPANY LIMITED +1
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Patent Information

Application Number
CN202411576460.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-11-06
Publication Date
2025-03-25
Estimated Expiration
2044-11-06

AI Technical Summary

Technical Problem

The battery-powered circuit of traditional wireless temperature measurement devices cannot work properly when the battery voltage drops to 3V, resulting in low battery utilization and short effective use time.

Method used

A battery power supply circuit including a main power supply module and an increase power supply module is designed. The battery voltage is detected by the detection and comparison module, and switched to the increase power supply module when the voltage is lower than the preset reference voltage. The battery voltage is increased by using the oscillation boost sub-module to support the normal operation of the subsequent circuit.

Benefits of technology

The working voltage range of the wireless temperature measurement device has been broadened, the working time of battery power is extended, and the economical and efficiency of the device has been improved.

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Abstract

The invention discloses a battery power supply circuit and method in a wireless temperature measuring device, and the circuit comprises a main power supply module which is used for supplying power when the voltage of a battery is higher than a preset reference voltage value, and is a power supply branch of an equivalent controlled switch K1; the time increasing power supply module is used for supplying power when the battery voltage is lower than a preset reference voltage value, and is a power supply branch circuit formed by connecting an equivalent controlled switch K2 and the oscillation boosting submodule in series; and the detection and comparison module is used for detecting the battery voltage of the wireless temperature measuring device, comparing the battery voltage with a preset reference voltage value, outputting two paths of interlocked signals Q1 and Q2, and respectively driving the controlled switch K1 and the controlled switch K2. The invention has the advantages of simple structure, prolonged power supply time and the like.
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