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Battery management system with intelligent thermal management system control

A technology of battery management system and intelligent management system, which is applied in the direction of secondary battery, battery temperature control, secondary battery repair/maintenance, etc. It can solve the problem that the control method lags behind the internal temperature change and change of the battery, and achieves the reduction of battery temperature. Fluctuation, effects of improving service life and performance

Active Publication Date: 2020-06-02
SUN YAT SEN UNIV +1
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Problems solved by technology

[0004] The existing thermal management system judges whether it is necessary to cool down the battery through the collected surface temperature of the battery, and its control method always lags behind the temperature change inside the battery
And because the temperature difference between the inside and outside of the battery changes with the temperature rise rate, it is impossible to solve this problem by setting a fixed advance amount.

Method used

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  • Battery management system with intelligent thermal management system control
  • Battery management system with intelligent thermal management system control
  • Battery management system with intelligent thermal management system control

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Embodiment Construction

[0027] Such as figure 1 As shown, the battery pack heat generation model used by the battery management system with intelligent thermal management system control is the corrected battery pack heat generation model based on the Bernardi monomer heat generation model. The Bernardi heat generation model formula is as follows:

[0028]

[0029] In the formula, is the local reaction current generated by the electrode reaction; is reversible heat; is the corresponding average open circuit voltage; I is the total current, E is the battery voltage; The heat generation rate caused by the uneven reaction rate of substances; is the heat generation rate of the phase change reaction. In general, the model divides the heat generation of the battery into two parts, one is Joule heat and the other is non-Joule heat. For the calculation of Joule heat, use the battery internal resistance model combined with the current discharge current, and use Joule's law to calculate. The batt...

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Abstract

The invention discloses a battery management system having an intelligent thermal management system control function. The battery management system comprises a data acquisition module and an intelligent thermal management system control module, wherein the intelligent thermal management system control module comprises an embedded processor, a data recording module and a thermal management system power control module, the data acquisition module is used for acquiring battery data and transmitting the batter data to the intelligent thermal management system control module, the intelligent thermal management system control module is used for obtaining required cooling power by calculation and controlling the thermal management system to cool a battery pack in advance, so that temperature control of the battery pack is more timely and accurate.

Description

technical field [0001] The invention relates to a battery management system, in particular to a battery management system capable of intelligent thermal management of a battery pack according to its working state. Background technique [0002] The working characteristics of lithium-ion batteries used in electric vehicles are significantly related to temperature. Too high or too low temperature will affect the chemical reactions inside the battery, which in turn will affect the performance, life and safety of the battery. In order to control the temperature of the battery pack, modern battery packs use active thermal management systems. [0003] Due to the limitations of technical means, current sensors cannot detect the temperature inside the battery, and mostly collect the temperature on the surface of the battery. When the battery is working, due to the limited heat transfer rate, the temperature rise inside the battery cannot be immediately expressed as the temperature r...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01M10/42H01M10/625H01M10/63
CPCH01M10/4207H01M10/425H01M10/625H01M10/63H01M2010/4271Y02E60/10
Inventor 谭晓军邹渊博卢文斌朱晨
Owner SUN YAT SEN UNIV
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