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How to measure battery power

A power and measurement technology, applied in the direction of measuring electrical variables, measuring electricity, measuring devices, etc., can solve the problems of large differences in internal resistance changes and difficulty in measuring the internal impedance of batteries, and achieve the effect of improving measurement efficiency

Inactive Publication Date: 2016-12-28
UPI SEMICON CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the disadvantage is that it is not easy to measure the internal resistance of the battery, and the difference in internal resistance changes will be greater when the battery ages
[0006] However, the above methods have their disadvantages, so a better battery power measurement method is needed

Method used

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  • How to measure battery power
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Experimental program
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Embodiment Construction

[0031] figure 1 It is a flow chart of a method for measuring battery capacity according to an embodiment of the present invention. see figure 1 . The power measurement method of this embodiment may include the following steps.

[0032] As shown in step S110, a lookup table is provided, and the lookup table stores a plurality of preset measurement confirmation voltages and a plurality of preset electric quantities, wherein the preset measurement confirmation voltages include full voltage and Cutoff voltage (cutoff voltage). Therefore, the look-up table stores information about the full voltage to the cut-off voltage. In addition, the look-up table also stores a plurality of temperature information and power information corresponding to each temperature information. For example, the lookup table may include Table 1 to Table 3 as follows. Table 1 is the 35°C / 1C comparison table, Table 2 is the 35°C / 0.7C comparison table, and Table 3 is the 5°C / 0.1C comparison table. Among ...

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Abstract

The present invention provides a battery quantity measurement method, which includes the following steps. A look-up table is provided, which stores a plurality of preset measurement and confirmation voltages and a plurality of preset power quantities. The first voltage of the battery is measured as a starting point. Calculate the end point based on the lookup table and the start point. Measure the voltage and current of the battery until a measurement voltage reaches the preset measurement confirmation voltage corresponding to the end point. Calculate the set power from the start point to the end point according to the look-up table. Calculate the actual power from the start point to the end point. And correct the set power according to the difference between the actual power and the set power.

Description

technical field [0001] The invention relates to a battery measurement, in particular to a battery power measurement method. Background technique [0002] In general, there are roughly the following methods for measuring power with a battery measuring IC (gas gauge IC). [0003] The first method of measuring electricity uses a coulomb counter. The coulomb counter obtains the battery capacity by integrating the current flowing into / out of the battery. However, the disadvantage is that it is effective for new batteries but cannot overcome the problems of battery aging and battery self-discharge. In addition, the power of the battery must be obtained after the battery is completely discharged. [0004] The second power measurement method uses open circuit voltage (OCV) for measurement. The power of the battery is monitored by the correlation between the battery voltage and the state of charge (SOC). However, the disadvantage is that the battery needs to reflect the change of...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 杨士庆
Owner UPI SEMICON CORP