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SOC interval dynamic curve correction method based on power battery application

A dynamic curve and power battery technology, applied in the direction of measuring electricity, measuring electrical variables, measuring devices, etc., can solve problems such as SOC jumps

Active Publication Date: 2019-04-16
浙江高泰昊能科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In order to solve the above problems, the present invention provides a dynamic curve correction method for SOC intervals based on power battery applications, which solves the problem of jumps in SOC after OCV calibration

Method used

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  • SOC interval dynamic curve correction method based on power battery application
  • SOC interval dynamic curve correction method based on power battery application
  • SOC interval dynamic curve correction method based on power battery application

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] 1. Solve the problem of too steep or too slow charging and discharging curve caused by OCV calibration.

[0027] 1. Discharge the battery to SOC=0%.

[0028] 2. Normal constant current charging for n time charging SOC = 60%

[0029] 3. Set SOC=85%.

[0030] 4. Stand still for n1 time, trigger OCV calibration to restore SOC to 60%.

[0031] 5. Check the difference between the SOC of the smallest monomer and the reported SOC, refer to the charge and discharge range table ({50,75},{65,80},{75,88},{85,95}), the SOC falls in { 85,95} interval, catch up at about 95%.

[0032] 6. Normal constant current charging to SOC=10%, check whether the curve between the actual SOC of the monomer and the reported SOC is relatively linear, and whether it is catching up with the target of 95%.

[0033] See the actual effect curve figure 2 .

[0034] 2. Solve the problem of SOC fluctuation caused by discharge feedback.

[0035] 1. Fully charge the battery first, SOC=100%.

[0036] 2....

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Abstract

The invention discloses a SOC interval dynamic curve correction method based on a power battery application. The method comprises the following steps that: whether a battery is in a charging state ora discharging state is determined; if the battery is in a charging state, an SOC calibration target is a maximum single SOC; if the battery is in a discharging state, the SOC calibration target is a minimum single SOC; a zone, in which the current SOC and SOC target fall, of a charging-discharging zone table is determined; a follow slope is calculated according to a target value of the charging-discharging zone table and a slope of a dynamic curve is controlled in real time based on the calculated slope; and calculation is carried out based on a current integral and the following slope to obtain a following granularity and the curve granularity is controlled in real time based on the following granularity, so that the SOC is calibrated. Therefore, a problem of SOC hopping after OCV calibration is solved; and the SOC error is reduced.

Description

technical field [0001] The invention belongs to the technical field of batteries, and in particular relates to a method for correcting dynamic curves in SOC intervals based on power battery applications. Background technique [0002] Due to different temperature environments and aging of the battery, the battery capacity QMAX will change, and the current integration method cannot accurately reflect the remaining available power, and the current integration method itself is also affected by the sampling accuracy. The SOC error will continue to increase during the time running. [0003] The traditional method is to use OCV calibration, but after using OCV calibration, the SOC value will jump. Moreover, during the charging and discharging process, the charging is based on the SOC of the largest monomer, and the discharging is based on the SOC of the smallest monomer. If the voltage difference between the monomers is large, the SOC value will jump during the charging and discha...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/382
Inventor 程亚兵倪力考
Owner 浙江高泰昊能科技有限公司
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