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Performance test method for power battery or battery pack used in hybrid electric vehicle

A technology for hybrid electric vehicles and power batteries, which is applied in the direction of measuring electricity, measuring devices, measuring electrical variables, etc. It can solve the problems of complex testing methods, performance testing of power batteries or battery packs or battery packs, etc., and achieve convenient and effective performance testing. Effect

Active Publication Date: 2016-02-10
TSINGHUA UNIV
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Problems solved by technology

[0004] However, the above three test methods are relatively complicated, and it is impossible to perform a simple and comprehensive test on the performance of the power battery or battery pack or battery pack of the hybrid vehicle when it is actually working.

Method used

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  • Performance test method for power battery or battery pack used in hybrid electric vehicle
  • Performance test method for power battery or battery pack used in hybrid electric vehicle
  • Performance test method for power battery or battery pack used in hybrid electric vehicle

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] The invention provides a performance testing method of a power battery or a battery pack for a hybrid electric vehicle, which comprises the following steps:

[0024] S1: Sampling the real-time vehicle speed of the hybrid vehicle and the current data of the power battery or battery pack through a data acquisition system at equal intervals;

[0025] S2: Draw the curve of the real-time vehicle speed versus time and the current of the power battery or battery pack versus time;

[0026] S3: Select the current data whose real-time vehicle speed is zero in proportion to the corresponding acquisition time according to the curve of the real-time vehicle speed over time, and draw a current probability density function (PDF) diagram;

[0027] S4: According to the current probability density function diagram (PDF), screen out the data with the characteristics of ...

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Abstract

The invention relates to a performance test method for a power battery or a battery packet of a hybrid power vehicle. The method comprises: performing sampling of real-time speed of the hybrid power vehicle and current data of the battery of the hybrid power vehicle at equal intervals through a data acquisition system; respectively drafting change curves of the real-time speed and the current of the battery along with time; according to the change cure of the real-time speed along with time, selecting current data with a real-time speed of zero, which occupies a quite small proportion of acquisition time, and drafting a current probability density function graph; according to the current probability density function graph, screening data with "three-peak graph" characteristics for rapid Fourier transform so as to obtain a rapid Fourier transform graph; according to the peak value in the current probability density function graph, determining a test current and according to the peak value in the rapid Fourier transform graph, determining a charge and discharge conversion period in a test; and according to the test current and the charge and discharge conversion period, setting a test scheme for the power battery of the hybrid power vehicle, and carrying out performance testing on the hybrid power vehicle battery.

Description

technical field [0001] The invention relates to a performance testing method of a power battery or a battery pack for a hybrid electric vehicle. Background technique [0002] Due to the introduction of batteries, hybrid electric vehicles have the advantages of energy saving and environmental protection. In the operation of hybrid electric vehicles, when the power of the internal combustion engine is insufficient, it can be supplemented by the battery; when the load is small, the surplus power can be generated to charge the battery. Make the internal combustion engine or battery as the main energy source work at the best efficiency, so as to achieve energy saving effect and prolong the service life of the main energy source. For batteries used in hybrid electric vehicles, special tests are required to ensure that the performance of the batteries used can meet the requirements of variable load conditions of hybrid electric vehicles, and also provide the basis for designing al...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/36
Inventor 冯旭宁卢兰光欧阳明高李建秋何向明华剑锋徐梁飞
Owner TSINGHUA UNIV
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