CONTROL CIRCUIT FOR PREVENTING HOT SWAPPING DURING HIGH-VOLTAGE LITHIUM BATTERY CHARGING

WIPO Patent Application WO/2024/087550

A1

A control circuit for preventing hot swapping during high-voltage lithium battery charging, comprising a charge pump module used for converting a power supply voltage VDD into a high-voltage power supply V1; a clamping module used for limiting the high-voltage power supply V1 to a fixed voltage, and comprising a first clamping unit and a second clamping unit which are sequentially connected in series between the high-voltage power supply V1 and a ground end; a control switch MLC1; a high-voltage transistor MHV1; an LDO module used for converting the voltage of a power supply V2 into a voltage VBAT for controlling a battery to be charged normally; and a battery full-charge detection circuit used for detecting a charge state of the battery. When the battery is in a charging state, the high-voltage transistor MHV1 is turned on, and V2=VIN; when the battery is in a fully charged state, the battery full-charge detection circuit outputs a high-level signal to the control switch MLC1, the control switch MLC1 is switched on, and the control switch MLC1 is short-circuited with the second clamping unit to reduce the voltage of the high-voltage power supply V1, so as to protect the LDO module.

JP2000166113	METHOD AND DEVICE FOR BALANCING LITHIUM ION BATTERY PACK
JPH08308103	HYBRID POWER SOURCE
JP4226677	Rechargeable battery device and electronic equipment

SHAO CHAO (CN)
YANG YIKAI (CN)

PCT/CN2023/090236

May 02, 2024

April 24, 2023

Click for automatic bibliography generation  

SHANGHAI SHININGIC ELECTRONIC TECH CO LTD (CN)

H02J7/00

SHANGHAI YUTENG PATENT AGENCY (GENERAL PARTNERSHIP) (CN)

View/Download PDF      PDF Help

Previous Patent: SEALING DETECTION APPARATUS

Next Patent: METHOD FOR PREPARING SILVER NANOWIRES USING SOFT TEMPLATE METHOD