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Lithium ion storage battery charging method based on sequential shunt switching regulation (S3R)

A technology of a battery pack and a charging method, which is applied in the direction of charging/discharging of secondary batteries, repair/maintenance of secondary batteries, etc., can solve problems such as the inability to meet the charging control of high current, constant current and constant voltage.

Active Publication Date: 2012-01-18
AEROSPACE DONGFANGHONG SATELLITE
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  • Abstract
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AI Technical Summary

Problems solved by technology

The BCR in the traditional S3R system only has constant current charging capability, which cannot meet the needs of low-orbit satellite lithium-ion battery high-current constant-current and constant-voltage charging control

Method used

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  • Lithium ion storage battery charging method based on sequential shunt switching regulation (S3R)
  • Lithium ion storage battery charging method based on sequential shunt switching regulation (S3R)
  • Lithium ion storage battery charging method based on sequential shunt switching regulation (S3R)

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Embodiment Construction

[0016] The principle of S3R (Sequential Switching Shunt ReguIator) system is as follows: figure 1 As shown, it usually consists of a shunt regulator (SR), a charge regulator (BCR), a discharge regulator (BDR), and a main error amplifier (MEA). The basic principle is to combine the shunt regulator, charge regulator and discharge regulator The inverter is controlled by a three-domain controller to provide users with fully regulated bus voltage. The three-domain controller integrates the feedback system and the main error amplifier from the same reference voltage. The main error amplifier is the difference between the bus voltage and the fixed reference voltage, reflecting the level of the bus voltage. The higher the bus voltage, the higher the MEA voltage. higher. The MEA voltage (0-5V) is divided into three sections, which are the shunt regulation domain, the charge regulation domain and the discharge regulation domain, and the corresponding MEA voltages decrease sequentially....

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Abstract

The invention discloses a lithium ion storage battery charging method based on sequential shunt switching regulation (S3R). Based on an original S3R system battery charging control regulator (BCR) constant current charging, the lithium ion storage battery charging method based on S3R improves a constant-pressure charging standard, and can introduce directly a part of solar battery arrays for charging of a storage battery in order to solve the problem of heavy-current charging. When heavy-current charging is needed, the directly introduced solar battery arrays and a BCR are combined to form a heavy and constant-current charging mode, wherein the BCR is utilized for accurate adjustment of charging current intensity. When charging develops to a constant voltage stage, a BEA replaces D / A control to convert the BCR to constant voltage control so that a charging current decreases gradually. When heavy-current charging is not needed, a rapid charging array is switched off by a BEA control signal. When a detection result shows that a solar cell array current is surplus and a charging current is less than a certain value, the storage battery is full and D / A output is stopped so that charging is finished. The lithium ion storage battery charging method based on S3R can satisfy the requirements of heavy-current, constant-current and constant-voltage charging control of Leo satellite lithium ion storage batteries.

Description

technical field [0001] The invention relates to a charging method for a lithium-ion battery pack. Background technique [0002] The design idea of ​​using S3R regulation technology was proposed at the third ESA Space Energy Conference in 1977 and caused great repercussions. At present, S3R regulation technology is widely used at home and abroad. [0003] In the S3R system, the energy of all sub-arrays is either supplied to the bus or shunted to the ground, and the energy of the sub-arrays cannot be directly used for charging the battery. Since all the energy is on the bus, the charging energy must be extracted from the bus and cannot affect the stability of the bus, so the BCR (charge regulator) charging regulation technology is introduced. The BCR is connected to the busbar, and the charging current reference is set by hardware or through the D / A signal (that is, the method of software annotation, which is convenient for adjusting the charging current on the rail), and the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01M10/44
CPCY02E60/12Y02E60/10
Inventor 鄢婉娟徐伟巩巍刘元默侯伟
Owner AEROSPACE DONGFANGHONG SATELLITE
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