A dzsoc algorithm for lithium iron phosphate battery

A lithium iron phosphate battery and algorithm technology, applied in the direction of measuring electricity, measuring electrical variables, instruments, etc., can solve the problem of no battery discharge cut-off point analysis and research, so as to avoid deep discharge, prevent overcharge and overdischarge, and avoid permanent discharge. Sexual Harmful Effects

Active Publication Date: 2022-07-19
FOSHAN POLYTECHNIC
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Problems solved by technology

At present, scholars at home and abroad are focusing on the estimation of SOC and the research of the battery management system, and have not analyzed the discharge cut-off point of the battery.

Method used

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  • A dzsoc algorithm for lithium iron phosphate battery
  • A dzsoc algorithm for lithium iron phosphate battery

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Embodiment Construction

[0033] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings in the specification, so as to make the technical solutions of the present invention and the beneficial effects thereof more clear and definite. The embodiments described below by referring to the accompanying drawings are exemplary, and are intended to explain the present invention and should not be construed as limiting the present invention.

[0034] Additional aspects and advantages of the present invention will become apparent in the description section that follows, or learned by practice of the present invention.

[0035] Explanation of terms: DZSOC, the English abbreviation of Dead Zone SOC; SOC, the English abbreviation of state of charge.

[0036] The DZSOC of the battery is the direct basis for the minimum threshold for the sustainable driving of the electric vehicle. The basic principle of a DZSOC algorithm for a lithium iron phosphat...

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Abstract

The invention discloses a DZSOC algorithm for a lithium iron phosphate battery. On the premise of fully considering the influence of load power and battery characteristics, the concept of dead zone SOC (DZSOC) is proposed for the first time, and the DZSOC algorithm provided by the invention is used to fuse at the DZSOC threshold Under the mechanism, it can effectively protect the use of the battery and avoid deep discharge, thereby prolonging the life of the battery. At the same time, the present invention also uses the improved equivalent circuit model to estimate the current state of charge NSOC, which has higher accuracy; by accurately estimating the current state of charge of the lithium iron phosphate battery, it can not only effectively prevent the battery from overcharging and overdischarging, but also Avoid permanent damage to the battery, greatly improve the life of the battery; and can greatly reduce the remaining capacity of the battery performance design, to ensure that the battery capacity is fully used.

Description

technical field [0001] The invention relates to the technical field of a lithium iron phosphate battery discharge management system, in particular to a DZSOC (Dead Zone SOC) algorithm of a lithium iron phosphate battery. Background technique [0002] In recent years, the demand for lithium iron phosphate batteries in electronic products has greatly increased. Lithium batteries can meet the needs of electric vehicles, and such batteries will play a pivotal role in the future power energy field. Lithium battery overdischarge is the discharge capacity of the lithium battery is greater than the rated capacity of the battery. If the battery is placed below a certain voltage, although the safety circuit inside the battery will be activated, the battery life will be damaged at this time, and even the battery's expiration date will be advanced. At present, scholars at home and abroad have focused on the estimation of SOC and the research of battery management system, but have not ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/367
CPCG01R31/367
Inventor 刘学鹏彭一航李荣恩黄永恩冯勇豪姚志轩
Owner FOSHAN POLYTECHNIC
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