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Battery SOC estimation algorithm

A battery and algorithm technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as poor user experience and SOC display value jumping, and achieve the effect of preventing jumps and improving user experience.

Active Publication Date: 2018-12-14
CONTEMPORARY AMPEREX TECH CO
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Problems solved by technology

[0004] In view of the above situation, it is necessary to provide a battery SOC estimation algorithm for the problem of poor user experience caused by the jump of the SOC display value in the prior art

Method used

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Embodiment Construction

[0047] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary only for explaining the present invention and should not be construed as limiting the present invention.

[0048] These and other aspects of embodiments of the invention will become apparent with reference to the following description and drawings. In these descriptions and drawings, some specific implementations of the embodiments of the present invention are specifically disclosed to represent some ways of implementing the principles of the embodiments of the present invention, but it should be understood that the scope of the embodiments of the present invention is not limited by This restriction. On the contrary, the embodiments of the p...

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Abstract

The invention discloses a battery SOC estimation algorithm. The battery SOC estimation algorithm comprises steps that a maximum SOC value and a minimum SOC value of a battery are acquired, and according to the maximum SOC value and the minimum SOC value, a target SOC value is calculated; a current SOC display value of a SOC display module is acquired, and a difference value between the current SOCdisplay value and the target SOC value is calculated, and the difference value is compared with a preset display threshold value; according a comparison result, the update rate of the current SOC display value during a charging and discharging process is determined, and the smooth change of the displayed SOC value is guaranteed, and the skip phenomenon of the SOC display value is prevented, and user experience is improved.

Description

technical field [0001] The invention relates to the field of automobiles, in particular to a battery SOC estimation algorithm. Background technique [0002] SOC (that is, the state of charge, which refers to the ratio of the remaining capacity of the battery to its capacity when it is fully charged), as a parameter to measure the remaining capacity of the battery pack, plays a very important role for the driver. If the remaining capacity of the battery cannot be accurately grasped, it may Cause the electric car to stop the risk on the road because of no electricity. In order to accurately measure the remaining power of the battery pack, there are currently some leading battery management systems (BMS), in which SOC (state of charge) is the core technology of the BMS. [0003] The SOC estimation algorithm of the battery consists of three parts: SOC calculation, SOC correction, and SOC display. After the SOC correction module corrects the SOC value, the SOC display module ou...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/36
Inventor 饶永康刘俊宇沈祖英姜筱华单丰武
Owner CONTEMPORARY AMPEREX TECH CO
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