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Equalization control method based on exclusive SOC estimation

A balanced control and balancing technology, applied in measuring devices, instruments, measuring electricity, etc., can solve the problem of over-balanced balancing system of battery packs being frequently started, and achieve the effect of improving unbalanced problems and effective battery balancing

Pending Publication Date: 2021-12-28
四川宽鑫科技发展有限公司
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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of excessive balancing of battery packs and frequent start-up of the balancing system in the prior art, and propose a balancing control method based on proprietary SOC estimation

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  • Equalization control method based on exclusive SOC estimation
  • Equalization control method based on exclusive SOC estimation
  • Equalization control method based on exclusive SOC estimation

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Embodiment Construction

[0033] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention.

[0034] Such as Figure 1-2 As shown, a balanced control method based on proprietary SOC estimation includes the following steps:

[0035] S01: Obtain the SOC value of each single battery;

[0036] S02: Use the formula ΔSOC=max(SOC[i])-min(SOC[j]) to calculate the ΔSOC value ΔSOC is the difference between the maximum and minimum SOC. In the formula, i and j are the battery numbers, and SOC[i] means that the number is The SOC value of the battery of i;

[0037] S03: When the ΔSOC result is less than the set threshold, return to S01 and wait for the next SOC estimate, otherwise proceed to the next equalization operation;

[0038] S04: Equalization operation: In the e...

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Abstract

The invention discloses an equalization control method based on exclusive SOC estimation. The method comprises the following steps: S01, acquiring SOC values of all single batteries; S02, using a formula that delta SOC = max(SOC[i]) - min(SOC[j]) is utilized to calculate a delta SOC value, wherein the delta SOC is a difference value between the maximum SOC and the minimum SOC, in the formula, i and j are battery numbers, and SOC[i] represents the SOC value of the battery with the number being i; and S03, when the delta SOC result is smaller than a preset threshold value, returning to the step S01 to wait for the next SOC estimation value, and otherwise, carrying out the next equalization operation. According to the invention, the equalization control method based on the special SOC estimation is different from an equalization evaluation index using terminal voltage, the equalization strategy based on the battery SOC can essentially improve the imbalance problem of the battery, and the battery SOC is the comprehensive performance of the battery voltage, the capacity and the like, so that accurate battery capacity information can be provided.

Description

technical field [0001] The invention relates to the technical field of battery balancing control, in particular to a balancing control method based on proprietary SOC estimation. Background technique [0002] Limited by the battery manufacturing process, even with the same working environment and charging and discharging operations, the inconsistency between the single cells in the battery pack still exists. The inconsistency of batteries means that the characteristics of voltage, SOC (State of Charge), internal resistance and capacity are different among batteries, so that not all batteries can reach the full or empty state when the batteries are in use, resulting in the failure of the energy storage system. The effective capacity is reduced. In order to maximize the effective capacity of the battery and maintain the consistency of the battery voltage and SOC, battery balancing is generally performed during charging and discharging. At present, it is more common to use th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/387
CPCG01R31/387
Inventor 李荣宽陈雪陈康
Owner 四川宽鑫科技发展有限公司
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