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Lithium battery fault detection method

A technology for fault detection and lithium batteries, applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc., can solve the problems of difficult and intuitive detection of lithium battery fault types and complicated detection methods, and achieve simple detection methods and improved detection Speed, optimize the effect of the detection process

Inactive Publication Date: 2019-09-27
PUTIAN CITY ZHUHUO INFORMATION TECH CO LTD
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Problems solved by technology

[0003] There will be faults in the production and use of lithium batteries, so it is necessary to detect the faults of lithium batteries. The detection methods of lithium batteries in the market are relatively complicated, and it is difficult to detect the fault types of lithium batteries intuitively.

Method used

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Embodiment Construction

[0027] Such as Figure 1-2 As shown, in the first example of the present invention, a lithium battery fault detection method is provided, the method comprising:

[0028] Step S1, taking at least three first-type test lithium batteries, respectively collecting the first test data G of the test lithium batteries in real time (n,m) ; The first test data includes the open circuit voltage V b(n,m) , capacitor voltage V s(n,m) , battery terminal voltage V (n,m) and working current I (n,m) ; The n is the serial number of the first type, and the n is a positive integer; the m is the serial number of the first test data, and the m is a positive integer;

[0029] Step S2, according to the first test data G acquired in the step S1 (n,m) , get the first output data column Y n (m) and the first input matrix Φ (n,m) ;

[0030] The first output data column Y n (m) Satisfied: Y n (m)=(V b(n,1) ,V b(n,2) ,V b(n,m) ) T ;

[0031] The first input matrix Φ (n,m) Satisfy:

[003...

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Abstract

The invention discloses a lithium battery fault detection method and relates to the lithium battery technical field. The method comprises the following steps: taking at least three test lithium batteries of a first type, and respectively collecting first test data of the test lithium batteries in real time; according to the first test data, obtaining a first output data column and a first input matrix; solving test identification parameters corresponding to the test lithium batteries; in the actual detection process, collecting second test data of a lithium battery to be detected in real time; according to the first test data, obtaining a second output data column and a second input matrix; solving actual detection identification parameters corresponding to the lithium battery to be detected; and finally comparing the actual detection identification parameters with the test identification parameters one by one to obtain a comparison value. The detection method is simple, the lithium battery detection process is optimized, the lithium battery detection speed is improved, and the fault type can be visually detected; the method can be widely applied to battery fault detection, and can also be applied to battery qualification detection.

Description

technical field [0001] The invention relates to the technical field of lithium batteries, in particular to a lithium battery fault detection method. Background technique [0002] Lithium batteries have the advantages of large specific energy, long cycle life, low self-discharge rate, and no pollution, so they are widely used in various fields. At present, battery bicycles, hybrid electric vehicles and all-electric vehicles have put forward new requirements on the power and capacity of batteries, and the popularity of electric vehicles is heavily dependent on the storage capacity of battery energy. Lithium batteries have high Coulombic efficiency during use, and as the price of lithium batteries drops, it will occupy a huge market in the field of electric vehicles. In addition, lithium batteries have been more widely used in various portable devices, such as mobile phones, portable computers, and the like. [0003] There will be faults in the production and use of lithium b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/3842G01R31/388G01R31/36
CPCG01R31/36G01R31/3842G01R31/388
Inventor 陈文楷
Owner PUTIAN CITY ZHUHUO INFORMATION TECH CO LTD
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