An intelligent charging system and method based on strain and temperature and voltage regulation

An intelligent charging and voltage technology, applied in battery circuit devices, current collectors, electric vehicles, etc., can solve the problems of not reaching the optimal mode, large deformation and internal induced stress, etc., and achieve the effect of improving lifespan and charging speed.

Active Publication Date: 2020-01-03
BEIHANG UNIV
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Problems solved by technology

[0005] With the replacement of electrode materials, new electrode materials (including silicon, carbon-silicon compounds, etc.) are gradually used in lithium batteries. These materials will produce large deformation and internal induced stress during charging, which puts forward a reasonable charging mode. new challenge
At present, only the real-time values ​​of temperature and voltage are considered to control the charging current or voltage mode, which still cannot meet the requirements of the optimal mode.

Method used

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  • An intelligent charging system and method based on strain and temperature and voltage regulation
  • An intelligent charging system and method based on strain and temperature and voltage regulation

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specific Embodiment

[0028] According to the characteristics of easy expansion of the new generation lithium battery, the present invention considers that the control of the charging current and voltage needs to fully consider the voltage, temperature and deformation. The application scope of the intelligent charging system is the lithium battery with large deformation during charging and discharging. The lithium battery with large deformation refers to the lithium battery whose positive or negative electrode material has a volume expansion rate greater than 10% from a lithium-poor to a lithium-rich state.

[0029] Such as figure 1 As shown, the system of the present invention is made up of strain sensor, temperature sensor, voltage sensor, data acquisition device, intelligent controller and charger; Voltage, the temperature sensor is used to measure the temperature of the lithium battery, and the strain, voltage, and temperature are collected by the data acquisition device. The intelligent contro...

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Abstract

The invention relates to an intelligent charging system and method based on strain, temperature and voltage regulation and control. The intelligent charging system is different from a traditional intelligent charging system only based on temperature or voltage and is the intelligent charging system based on strain, temperature and voltage. The charging system comprises a strain sensor, a temperature sensor, a voltage sensor, a data acquisition device, an intelligent controller and a charger. Battery temperature, battery strain and battery open-circuit voltage are measured in real time in the charging process, the intelligent controller regulates and controls charging voltage or charging current according to voltage, strain and temperature data to complete the charging process. The system is conductive to increase of novel lithium batteries, or improvement of the charging speed of largely deforming lithium batteries and prolonging of the cycle life of the batteries.

Description

technical field [0001] The invention relates to the field of lithium batteries and lithium battery charging and discharging, in particular to an intelligent charging system and method based on strain, temperature and voltage regulation. Background technique [0002] Lithium batteries are widely used in aerospace, automobiles, mobile phones and other fields. New anode materials, including silicon and other materials that may have large deformations, are beginning to be used in lithium batteries. [0003] Reasonable charging methods can speed up the charging of lithium batteries and increase the life of lithium batteries. Existing lithium battery charging equipment generally charges lithium batteries through current control or voltage control, and the simplest modes are constant current charging, constant voltage charging and constant current and constant voltage mixed mode. [0004] According to the characteristics of the lithium battery charging and discharging, the existi...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H02J7/00
Inventor 许骏刘冰河高翔贾亦楷
Owner BEIHANG UNIV
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