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MOS tube voltage difference automatic adjusting device and method

A MOS tube, automatic adjustment technology, applied in the direction of secondary battery repair/maintenance, secondary battery charging/discharging, electrical components, etc. problems such as small voltage drop, to achieve the effect of improving heat dissipation, reducing power consumption, and improving output efficiency

Pending Publication Date: 2021-06-22
FUJIAN NEBULA ELECTRONICS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The voltage drop of the MOS tube becomes smaller, and when the overall output impedance changes little, the load capacity of the front-end power supply output decreases, which increases the output power consumption and the heat generated

Method used

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  • MOS tube voltage difference automatic adjusting device and method
  • MOS tube voltage difference automatic adjusting device and method
  • MOS tube voltage difference automatic adjusting device and method

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Embodiment Construction

[0038] The general idea of ​​the technical solution in the embodiment of this application is as follows: compare the front-end voltage value FB_VOUT and the back-end voltage value VF_MOS by setting the MOS tube pressure difference detection circuit in real time, and set the window current comparison circuit to compare the output current value FB_IOUT and the current standard in real time The value ICON_SET, based on the comparison result, enables the voltage drop adjustment enabling circuit to work, adjusts the front-end voltage output value V_SET and the divided voltage value V_SET_F; the MCU sets the back-end voltage value VF_MOS based on the front-end voltage output value V_SET and outputs it to the MOS tube pressure difference detection circuit , the power driver chip sets the output voltage of the front-end power supply based on the divided voltage value V_SET_F, so as to realize adaptive adjustment of the voltage difference of the MOS tube, thereby reducing the power consu...

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Abstract

The invention provides an MOS tube voltage difference automatic adjusting device and method in the technical field of battery formation. The device comprises an MOS tube voltage difference detection circuit, a voltage difference comparison circuit, a window current comparison circuit, a voltage drop adjustment enabling circuit, a power supply driving chip and an MCU. The MCU is connected with the MOS tube voltage difference detection circuit, the voltage drop adjustment enabling circuit, the voltage difference comparison circuit and the window current comparison circuit. The input end of the voltage difference comparison circuit is connected with the output end of the MOS tube voltage difference detection circuit, and the output end of the voltage difference comparison circuit is connected with the voltage drop adjustment enabling circuit; the input end of the voltage drop adjustment enabling circuit is connected with the output end of the window current comparison circuit, and the output end of the voltage drop adjustment enabling circuit is connected with the power supply driving chip. The circuit has the advantages that the self-adaptive adjustment of the voltage difference of the MOS tube is realized, and the power consumption of the MOS tube is greatly reduced.

Description

technical field [0001] The invention relates to the technical field of battery formation, in particular to a device and method for automatically adjusting the pressure difference of a MOS tube. Background technique [0002] The formation of lithium-ion batteries is to charge the manufactured lithium-ion batteries with a small current for the first time to form a passivation layer on the surface of the negative electrode, that is, the solid electrolyte interface film (SEI film). During the process of battery formation, that is, when the front-end power supply is charging the battery, the voltage of the battery gradually rises, but the front-end power supply cannot adapt to the rise of the battery voltage, causing the MOS tube of the front-end power supply to receive the feedback signal of the battery voltage rise. , the pressure drop (pressure difference) becomes smaller. The voltage drop of the MOS tube becomes smaller, and when the overall output impedance changes little, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H03K17/08H01M10/44
CPCH01M10/446H03K17/08H03K2017/0806Y02E60/10
Inventor 李有财邓秉杰林德超杨耀荣吴煌麒陈言祥
Owner FUJIAN NEBULA ELECTRONICS CO LTD
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