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Method for balancing serial electric quantity energy storage system

An energy storage system, energy storage technology, applied in the direction of collectors, electric vehicles, electrical components, etc., can solve problems such as power waste, discharge resistance heating, etc.

Active Publication Date: 2011-02-09
洛阳乾禾仪器有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] The purpose of the present invention is to provide a method for equalizing electric energy storage in series to solve the problem of serious heating of discharge resistors and waste of electric energy during the equalization management process of discharge between monomers of electric energy storage systems in series

Method used

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Examples

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Effect test

Embodiment Construction

[0022] The balancing method of the series electric energy storage system of the present invention has the following steps:

[0023] (1) The equalization system regularly samples the voltage of each energy storage unit in the series-connected energy storage system to obtain the actual voltage value of each energy storage unit;

[0024] (2) Dynamically calculate the current average voltage that a single energy storage unit of the energy storage system should have, and obtain the current average voltage limit;

[0025] (3) Compare the actual voltage value of each energy storage unit with the current average voltage limit value, and if no actual voltage value of any unit is found to be lower than the current voltage average limit value, the balance system will go to sleep;

[0026] (4) If there are cells whose actual voltage value is lower than the limit value of the current average voltage value, start the switching power supply to charge the energy storage cells one by one, and ...

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Abstract

The invention relates to a method for balancing serial electric quantity energy storage. The method comprises the following steps: performing voltage sampling on each energy storage monomer in a serial electric quantity energy storage system to obtain the actual voltage value of each energy storage monomer; dynamically calculating a current voltage average value that each energy storage monomer of the energy storage system is expected to have to obtain a limit value of the current voltage average value; comparing the actual voltage value of each energy storage monomer with the limit value of the current voltage average value; after finding monomers of which the actual voltage values are lower than the limit value of the current voltage average value, starting a switch power supply to charge the energy storage monomers of which the actual voltage values are lower than the limit value of the current voltage average value one by one; dynamically monitoring the actual voltage value of each energy storage monomer during the charge, dynamically updating and calculating the current voltage average value that each energy storage monomer of the energy storage system is expected to have in real time, and obtaining the limit value of current voltage average value at the same time; and when the actual voltage value of the charged monomer reaches the current voltage average value, stoppingcharging the monomer.

Description

technical field [0001] The invention relates to an equalization method for a series electric energy storage system, and belongs to the technical field of energy storage monomer equalization management. Background technique [0002] In recent years, lithium-ion batteries and supercapacitors have developed rapidly in various application fields of new energy, but a prominent problem has been exposed in the process of use-the energy balance problem among the monomers in the module. Due to the limitations of the manufacturing process principles of lithium-ion batteries and supercapacitors, the maximum voltage of the monomers is only 4.2V and 2.7V respectively, and the maximum voltage of some water-based supercapacitors is even lower, only 1.2V, so these energy storage devices must first be connected in series Modules with a certain voltage can be used as a power system. Common module voltages are 24V, 36V, 48V, etc. During the use of a group of modules, due to differences in indi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02J7/00
Inventor 陈飞飞武少杰
Owner 洛阳乾禾仪器有限公司
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