Method and device for controlling temperature of lithium ion battery

Abstract

The invention provides a method and a device for controlling the temperature of a lithium ion battery. The method comprises the following steps: acquiring the temperatures of at least three continuoustime points and a current direction of a present time point of a lithium ion battery, wherein the at least three continuous time points include the current time point and at least two time points before the present time point; according to the temperature of the present time point and a target temperature, calculating temperature deviation of the present time point of the lithium ion battery; according to the temperatures of the at least three continuous time points, calculating the temperature variation trend of the lithium ion battery; according to the current direction of the present timepoint, confirming present charge / discharge states of the lithium ion battery; and according to the temperature deviation of the present time point of the lithium ion battery, the temperature variationtrend of the lithium ion battery, and the present charge / discharge state of the lithium ion battery, confirming voltage adjustment quantity of a refrigeration device. By adopting the method and the device, temperature fluctuation of a battery module is very well inhibited.

Description

technical field [0001] The invention relates to the field of computer technology, in particular to a method and device for controlling the temperature of a lithium-ion battery. Background technique [0002] With the large-scale application of lithium-ion batteries in electric vehicles and power energy storage, lithium battery group technology is becoming more and more mature, and energy storage products suitable for the rail transit industry are gradually being marketed. The thermal field analysis and heat dissipation technology of lithium battery system have also become the focus of attention. [0003] However, at present, the research on heat dissipation of lithium batteries is mostly focused on structural design and system integration. There is insufficient research on battery temperature control strategies for battery heat generation and specific heat dissipation methods at home and abroad, especially the control methods that can be realized by engineering are few and fa...

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Problems solved by technology

[0003] However, at present, the research on heat dissipation of lithium batteries is mostly focused on structural design and system integration. There is insufficient research on battery temperature control strategies for battery heat generation and specific heat dissipation methods at home and abroad, especially the control methods that can be realized by engineering are few and far between. few

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