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Method and device for optimizing power battery heating noise

A technology of power battery and optimization method, which is applied in power plant, electric power plant, battery/fuel cell control device, etc., can solve the problems of poor uniformity of temperature rise, complex structure of external heating method, etc., and achieve the effect of noise optimization

Active Publication Date: 2022-05-03
深蓝汽车科技有限公司
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  • Application Information

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Problems solved by technology

However, the external heating method has the disadvantages of complex structure and poor uniformity of temperature rise.

Method used

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  • Method and device for optimizing power battery heating noise
  • Method and device for optimizing power battery heating noise
  • Method and device for optimizing power battery heating noise

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Experimental program
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Embodiment Construction

[0047] Exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present invention are shown in the drawings, it should be understood that the invention may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided for more thorough understanding of the present invention and to fully convey the scope of the present invention to those skilled in the art.

[0048] Such as Picture 1-1 and Figure 1-2, the inventor conducted spectrum analysis on the battery heating noise through experiments, and found that the noise spectrum is characterized by constant frequency and its multiplied frequency. At the same time, the noise spectrum and the AC current spectrum echo each other. The frequency doubling characteristics and the frequency spectrum characteristics of the AC current are closely related to the ...

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Abstract

The proposal relates to a power battery heating noise optimization method and device to reduce the sound pressure level and sharpness of the noise during the battery heating process and improve the sound quality of the battery heating noise. The power battery heating noise optimization method includes: selecting the basic fixed-frequency switching frequency for IGBT to output pulse current; selecting the frequency bandwidth for optimal pulse current amplitude output by IGBT; generating random variable frequency based on the basic fixed-frequency switching frequency and frequency bandwidth Switching frequency: output the random variable frequency switching frequency to the IGBT, so that the IGBT performs pulse current output according to the random variable frequency switching frequency, so as to perform pulse heating on the power battery, so that the heating rate of the power battery is the highest and the noise sound pressure generated during the heating process of the power battery Both level and noise sharpness meet the preset noise optimization requirements; the frequency value of the random variable frequency switching frequency is within the frequency range formed by the basic fixed frequency switching frequency and the target fixed frequency switching frequency.

Description

technical field [0001] The invention belongs to the field of NVH noise control optimization, and in particular relates to a power battery heating noise optimization method and device. Background technique [0002] The new energy vehicle battery is mainly a lithium battery, and the lithium battery electrolyte moves slowly in a low temperature environment, which affects the transfer activity of lithium ions between the positive and negative electrodes, resulting in a decline in the charge and discharge performance of the lithium battery. Among them, the charge and discharge performance of lithium iron phosphate battery at low temperature is the worst. The working temperature of lithium iron phosphate battery is generally required to be above -20°C, and the charge and discharge performance of lithium iron phosphate battery is severely limited below -20°C. Therefore, in a low temperature environment below -20°C, in order to maintain the charge and discharge performance of the ba...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/615H01M10/625H01M10/42B60K1/00B60L58/27
CPCH01M10/615H01M10/625H01M10/42B60K1/00B60L58/27B60K2001/008Y02T10/70Y02E60/10
Inventor 郑伟邓清鹏喻成邓承浩周立群丁艳平牟小龙周安健
Owner 深蓝汽车科技有限公司
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