Method for evaluating uncertainty of measurement results of battery combustion testing machine

A technology of combustion test and measurement results, which is used in chemical analysis, electrical digital data processing, special data processing applications using combustion, etc.

Pending Publication Date: 2018-10-12
SHANGHAI SINOTEST MEASUREMENT TECH
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Problems solved by technology

However, the calculation accuracy of the uncertainty of the measurement results by this method is not high, and this method is only aimed at the laser particle size analyzer, so this method cannot be applied to the evaluation of the uncertainty of the measurement results of the battery combustion tester. For the two For different instruments, the parameters that affect the test results are not the same, so the methods of the prior art have certain limitations, and there is still no uncertainty evaluation method for the battery combustion tester

Method used

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  • Method for evaluating uncertainty of measurement results of battery combustion testing machine
  • Method for evaluating uncertainty of measurement results of battery combustion testing machine
  • Method for evaluating uncertainty of measurement results of battery combustion testing machine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0135] Experimental object: No. 1 battery combustion test machine

[0136] 1. Evaluation of measurement uncertainty of burner inner diameter

[0137] The standard uncertainty component u introduced by the repeatability of the measurement 11 :

[0138] Perform 10 repeated measurements with equal precision on the 9.5mm piston diameter, and get the standard deviation u of a single experiment 11 =s≈0.016;

[0139] Uncertainty component u introduced by caliper indication error 12 :

[0140] For a digital caliper with a measuring range of 300mm and a division value of 0.01mm, the indication error is ±0.04mm, which is evenly distributed, and the inclusion factor is So its standard uncertainty

[0141] The input quantities are not correlated with each other, so the composite uncertainty caused by the measurement of the inner diameter of the burner u 1 for: Its expanded uncertainty U 1 For: U 1 =k·u 1 =0.056, (k=2).

[0142] 2. Evaluation of measurement uncertainty of f...

Embodiment 2

[0162] Experimental object: No. 2 battery combustion test machine

[0163] 1. Evaluation of measurement uncertainty of burner inner diameter

[0164] The standard uncertainty component u introduced by the repeatability of the measurement 11 :

[0165] Perform 10 repeated measurements with equal precision on the 9.5mm piston diameter, and get the standard deviation u of a single experiment 11 =s≈0.022

[0166] Uncertainty component u introduced by caliper indication error 12 :

[0167] For a digital caliper with a measuring range of 300mm and a division value of 0.01mm, the indication error is ±0.04mm, which is evenly distributed, and the inclusion factor is So its standard uncertainty

[0168] The input quantities are not correlated with each other, so the composite uncertainty caused by the measurement of the inner diameter of the burner u 1 for: Its expanded uncertainty U 1 For: U 1 =k·u 1 =0.064, (k=2).

[0169] 2. Evaluation of measurement uncertainty of fl...

Embodiment 3

[0190] Experimental object: No. 3 battery combustion test machine

[0191] 1. Evaluation of measurement uncertainty of burner inner diameter

[0192] The standard uncertainty component u introduced by the repeatability of the measurement 11 :

[0193] Perform 10 repeated measurements with equal precision on the 9.5mm piston diameter, and get the standard deviation u of a single experiment 11 =s≈0.020;

[0194] Uncertainty component u introduced by caliper indication error 12 :

[0195] For a digital caliper with a measuring range of 300mm and a division value of 0.01mm, the indication error is ±0.04mm, which is evenly distributed, and the inclusion factor is So its standard uncertainty

[0196] The input quantities are not correlated with each other, so the composite uncertainty caused by the measurement of the inner diameter of the burner u 1 for: Its expanded uncertainty U 1 For: U 1 =k·u 1 =0.060, (k=2).

[0197] 2. Evaluation of measurement uncertainty of f...

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Abstract

The invention discloses a method for evaluating the uncertainty of measurement results of a battery combustion testing machine. The method comprises the following steps of: firstly putting a to-be-tested battery into the battery combustion testing machine to carry out flame resistance analysis; counting the following various uncertainty components influencing the measurement results: the combineduncertainty u1 caused by the inner diameter measurement of a combustor, the combined uncertainty u2 caused by the calibration of the flame application time, the combined uncertainty u3 caused by the measurement of the after flame time and the combined uncertainty u4 caused by the measurement of the flame height; and calculating the combined standard uncertainty uc shown in the specification and the expanded uncertainty U=k.uc (k=2). The method disclosed by the invention has the advantages that various uncertainty components of the battery combustion testing machine are comprehensively quantified and analyzed; a scientific, complete and accurate evaluation method is provided for evaluating the reliability of the measurement results of the battery combustion testing machine; and the blank ofhow to evaluate the uncertainty of the measurement results of the battery combustion testing machine is filled.

Description

technical field [0001] The design of the invention belongs to the field of calculation measurement and statistics, and in particular relates to a method for evaluating the uncertainty of measurement results of a battery combustion testing machine. Background technique [0002] In recent years, with the popularization and application of batteries in daily life, the safety of batteries has attracted more and more attention from the society. Under abuse conditions (heating, overcharge, overdischarge, short circuit, vibration, extrusion, etc.), the battery may cause combustion or even explosion. Once a combustion or explosion accident occurs, it may cause fire, personal injury and other serious incidents . "There are several dangerous things that can happen, one of which is overcharging, which causes heat, which in turn causes unwanted chemical reactions at the anode," said George Crabtree, director of the Energy Storage Experiment Center at Argonne National Laboratory in the U...

Claims

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Application Information

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IPC IPC(8): G06F17/50G01N31/12
CPCG01N31/12G06F30/20
Inventor 黎丛兵黎审非曾宏勋练恒乐黎丛焕
Owner SHANGHAI SINOTEST MEASUREMENT TECH
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