Method for real-time evaluating internal-external temperature difference of nickel-hydrogen electrokinetic cell

A technology of internal and external temperature difference, power battery, applied in nickel battery, secondary battery, alkaline battery, etc.

Inactive Publication Date: 2007-08-08
TSINGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are existing research works at home and abroad, and there is no introduction to the public literature on the real-time calculation of the internal temperature field of the battery on electric vehicles.

Method used

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  • Method for real-time evaluating internal-external temperature difference of nickel-hydrogen electrokinetic cell
  • Method for real-time evaluating internal-external temperature difference of nickel-hydrogen electrokinetic cell
  • Method for real-time evaluating internal-external temperature difference of nickel-hydrogen electrokinetic cell

Examples

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Embodiment Construction

[0078]Taking a nickel-metal hydride battery pack with a rated capacity of 80Ah, which is composed of 320 cells in series, as an example, the implementation process of the method for real-time estimation of the temperature difference between the inside and outside of the electric vehicle power battery is introduced. Figure 2 shows the Ni-MH battery pack, and Figure 3 shows the battery modules and battery cells in the battery pack, and the rightmost battery cell in the figure is stripped of its casing. Figure 4 shows the process of utilizing the present invention to obtain the highest temperature inside the battery cell

[0079] The first step: conduct a battery test.

[0080] (1) Ni-MH battery heat generation characteristics test

[0081] The battery heat generation characteristic test is used to grasp the temperature change curve of the battery surface during the charging and discharging process of the battery, which is the basic basis for verifying the battery thermal model....

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Abstract

The invention relates to battery set thermal management technique, which is characterized by the following: getting nickel and hydrogen battery even thermal proportion based on experiment, thermal speed and battery balance motion temperature parameters; in computer, establishing battery thermal module to use software Fluent to get inside temperature field distribution; then using natural wind temperature difference and even current as input to establish one temperature difference module to reflect current, work time and surface transmission parameters.

Description

technical field [0001] A method for estimating the temperature difference between the inside and outside of a nickel-metal hydride power battery in real time relates to the technical field of thermal management of battery packs for electric vehicles. Background technique [0002] New energy vehicles are an inevitable choice for the automotive industry to deal with the world's environmental and energy issues. As the most important component of new energy vehicles, electric vehicles are currently a hot spot in the world's automotive technology. According to different power sources, electric vehicles can be divided into three categories: battery electric vehicles (BEV), hybrid electric vehicles (HEV) and fuel cell vehicles (FCV). Both BEV and HEV use power batteries as power sources, and power batteries have a decisive impact on the power, safety and economy of the vehicle. [0003] The most commonly used power batteries for BEVs and HEVs are Ni-MH batteries and Li-ion batter...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/50H01M10/42H01M10/30G01K3/08G06F19/00H01M10/613
CPCY02E60/124Y02E60/10
Inventor 林成涛田光宇仇斌陈全世韩晓东
Owner TSINGHUA UNIV
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