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Lithium primary battery capacity monitoring method

A battery capacity, one-time technology, applied in the electronic field, can solve the problems of increasing cost and energy consumption, and achieve the effect of increasing cost and high precision

Active Publication Date: 2020-12-18
RAMWAY NEW ENERGY CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The disadvantage of this method is that the load needs to be powered off and restarted continuously, and at the same time, a switch and a switch control circuit need to be added. This method not only increases the cost, but also increases additional energy consumption.

Method used

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  • Lithium primary battery capacity monitoring method
  • Lithium primary battery capacity monitoring method
  • Lithium primary battery capacity monitoring method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0040] Such as figure 1 As shown, a lithium primary battery capacity monitoring circuit includes a lithium battery, filter capacitor, current sampling precision resistor, load circuit, A / D voltage conversion circuit, battery internal resistance calculation and capacity judgment firmware, the lithium battery, filter Capacitors and precision resistors are connected in series to form the main circuit. There is a line ground between the lithium battery and the filter capacitor; the load circuit is connected in parallel with the filter capacitor; the positive and negative terminals of the precision resistor are respectively connected to the A / D voltage conversion The positive and negative ends of the circuit; the battery internal resistance calculation and capacity judgment firmware are connected in series with the A / D voltage conversion circuit.

[0041]The lithium battery is a lithium primary battery, the lithium primary battery is a lithium thionyl chloride battery, and the lith...

Embodiment 2

[0053] A lithium primary battery capacity monitoring circuit, including lithium battery, filter capacitor, current sampling precision resistor, load circuit, A / D voltage conversion circuit, battery internal resistance calculation and capacity judgment firmware, the lithium battery, filter capacitor, precision Resistors are connected in series to form a main circuit, and a line ground is provided between the lithium battery and the filter capacitor; the load circuit is connected in parallel with the filter capacitor; Both ends of the negative pole; the firmware for calculating the internal resistance of the battery and judging the capacity is connected in series with the A / D voltage conversion circuit.

[0054] The lithium battery is a lithium primary battery, the lithium primary battery is a lithium thionyl chloride battery, and the lithium thionyl chloride battery is an ER14250 lithium thionyl chloride battery.

[0055] The filter capacitor is a large-capacity super capacitor...

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PUM

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Abstract

The invention discloses a disposable lithium battery capacity monitoring method, and belongs to the field of electronic technologies. The disposable lithium battery capacity monitoring method adopts anew circuit structure in which a minimal precision resistor is connected in series between a lithium battery and an external filter capacitor, the voltage to earth at two ends of the series precisionresistor is measured by an A / D voltage conversion circuit while a load is in operation, the output current of the battery can be obtained through calculation, the internal resistance of the battery is judged according to the output voltage of the battery, the remaining capacity of the battery can be obtained according to a pre-established disposable lithium battery capacity model, and an alarm can be given when the set threshold capacity is reached so as to achieve effective monitoring for the capacity of the disposable lithium battery. The method not only is high in precision, but also doesnot increase the cost and additional energy consumption.

Description

【Technical field】 [0001] The invention belongs to the technical field of electronics and relates to a method for monitoring the capacity of a lithium primary battery. 【Background technique】 [0002] With the development of the Internet of Things industry and the construction of the basic network, the application of sensors in the Internet of Things network is becoming more and more extensive. Many IoT sensor circuits are inconvenient to get power from the grid, but because the power consumption is very small, they can be powered by large-capacity disposable batteries, which can maintain the working time for 8 to 10 years, such as water meters, heat meters, etc. The sensor module needs to send battery capacity information to the server regularly, and send an alarm signal to the server before the battery is exhausted to remind network maintenance personnel to replace the battery in time. Therefore, the ability to accurately measure the battery capacity has become a must for th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/388G01R31/389
Inventor 陈阜东谭卫国张中其
Owner RAMWAY NEW ENERGY CO LTD
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