Temperature estimation method, system, medium and equipment suitable for interior of monomer battery
A single battery, temperature coefficient technology, applied in the direction of battery/fuel cell control devices, electric vehicles, vehicle components, etc., can solve the problem of not being able to apply temperature estimation well, and achieve the effect of improving reliability and safety
Active Publication Date: 2020-02-21
SHANGHAI JIAO TONG UNIV
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[0036]The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several changes and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.
[0037] Such as Figure 1-Figure 5 As shown, according to the present invention, a temperature estimation method suitable for the interior of a single battery is characterized in that it includes: the step of obtaining the temperature coefficient of electromotive force: according to the voltage information, current information, and battery surface temperature information recorded by the BMS at any time, obtain Electromotive force temperature coefficient information; total resistance acquisition steps: acc...
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The invention provides temperature estimation method, system, medium and equipment suitable for the interior of a monomer battery. The temperature estimation method comprises the steps that an electromotive force temperature coefficient is obtained, specifically, the electromotive force temperature coefficient information is obtained according to voltage information, current information and battery surface temperature information recorded by a BMS at different moments; a total resistance is obtained, specifically, the battery total resistance information is obtained according to the voltage information and the current information recorded by the BMS at different moments; an environmental temperature is obtained, specifically, the environmental temperature information is obtained through pasting a temperature sensor on a battery; a total heat-generating power is obtained, specifically, the total heat-generating power is obtained through the current thermal effect according to the current recorded by the BMS at different moments and the obtained total resistance, and thus the total heat-generating power information is obtained; and the battery internal temperature is estimated, specifically, the battery internal temperature estimation result information is obtained according to the electromotive force temperature coefficient information, the battery total resistance information,the environmental temperature information and the total heat-generating power information. According to the temperature estimation method, system, medium and equipment, the functions of the thermal management system of the battery is facilitated, so that the reliability and the safety of the battery pack are improved.
Description
technical field [0001] The present invention relates to the field of battery temperature acquisition, in particular to a temperature estimation method, system, medium and equipment suitable for the interior of a single battery, especially a method for estimating the internal temperature of a single lithium ion battery. Background technique [0002] During the use of electric vehicle batteries, accurate estimation of the battery temperature plays an important role in ensuring the normal operation of the battery. For example, by monitoring the temperature of the battery, we can know whether the battery is in a normal working state; the realization of the function of the battery thermal management system is also based on the accurate estimation of the battery temperature, and the corresponding measures can only be taken when the battery temperature is accurately estimated. thermal management strategy. At present, the battery temperature is generally collected by measuring the ...
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IPC IPC(8): B60L58/24B60L58/10
CPCB60L58/24B60L58/10Y02T10/70Y02E60/10
Inventor 张希王东升高一钊朱翀郭邦军
Owner SHANGHAI JIAO TONG UNIV