公开(公告)号：US20240079887A1

公开(公告)日：2024-03-07

申请号：US18220250

申请日：2023-07-10

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Wen-Fan Chang ,  Chun-Chieh Li ,  Jung-Nan Chien

IPC: H02J7/00

CPC classification number: H02J7/00302 ,  H02J7/00306 ,  H02J7/0031

Abstract: The present invention provides a protection circuit applied to a battery module, which includes a self-control protector, a switch element and a voltage clamping loop; the self-control protector includes a fuse unit and a heater; when the switch element receives a control signal, the switch element will be turned on; when the switch element is turned on, the voltage clamping loop provides a clamp voltage to clamp a working current passing through the self-control protector within a current range where the fuse unit can be blown; and as such, the fuse unit of the self-control protector will be blown by the working current heating the heater.

公开(公告)号：US20240241185A1

公开(公告)日：2024-07-18

申请号：US18220617

申请日：2023-07-11

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Wen-Fan Chang ,  Chun-Chieh Li ,  Shih-Fa Hung ,  Jian-Min Chen

IPC: G01R31/392 ,  G01R31/389 ,  H02J7/00

CPC classification number: G01R31/392 ,  G01R31/389 ,  H02J7/005 ,  H02J7/007182

Abstract: This disclosure provides an estimation method applied to a state of health of a battery, which executes a recharging to a battery when a battery voltage is lower than a threshold voltage. During the recharging, a battery state of health estimation procedure is performed from a first depth of discharge detection point to a second depth of discharge detection point. During the battery state of health estimation procedure, a voltage difference between a current battery voltage and an initial open-circuit voltage is accumulated over time from the first depth of discharge detection point to the second depth of discharge detection point to obtain an accumulation of current sampled voltage difference. An accumulation of estimated DC internal resistances can be equivalently obtained by the accumulation of current sampled voltage difference. Afterwards, the state of health of the battery can be determined based on the accumulation of estimated DC internal resistance.

公开(公告)号：US20240053406A1

公开(公告)日：2024-02-15

申请号：US18219997

申请日：2023-07-10

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Shih Fa Hung ,  Chong-Yong Wu ,  Wen-Fan Chang

IPC: G01R31/389 ,  G01R31/3842 ,  H02J7/00

CPC classification number: G01R31/389 ,  G01R31/3842 ,  H02J7/0047

Abstract: The invention presents a method for estimating a direct current internal resistance of a battery, which defines a depth of discharge detection interval including a first threshold and a second threshold. When the battery is discharging, a currently battery voltage are periodically measured, a currently depth of discharge is calculated, and an open-circuit voltage is queried. The currently battery voltage is subtracted from the open-circuit voltage to obtain a voltage difference. The voltage difference is continuously accumulated to obtain a currently accumulated voltage difference. The currently depth of discharge reaches the first threshold or the second threshold, the currently accumulated voltage difference is a first accumulated voltage difference or a second accumulated voltage difference. A difference value between the first accumulated voltage difference and the second accumulated voltage difference is divided by a discharging amount in the depth of discharge detection interval to obtain the direct current internal resistance.

公开(公告)号：US12287374B2

公开(公告)日：2025-04-29

申请号：US18219997

申请日：2023-07-10

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Shih Fa Hung ,  Chong-Yong Wu ,  Wen-Fan Chang

IPC: G01R31/389 ,  G01R31/3842 ,  H02J7/00

Abstract: The invention presents a method for estimating a direct current internal resistance of a battery, which defines a depth of discharge detection interval including a first threshold and a second threshold. When the battery is discharging, a currently battery voltage are periodically measured, a currently depth of discharge is calculated, and an open-circuit voltage is queried. The currently battery voltage is subtracted from the open-circuit voltage to obtain a voltage difference. The voltage difference is continuously accumulated to obtain a currently accumulated voltage difference. The currently depth of discharge reaches the first threshold or the second threshold, the currently accumulated voltage difference is a first accumulated voltage difference or a second accumulated voltage difference. A difference value between the first accumulated voltage difference and the second accumulated voltage difference is divided by a discharging amount in the depth of discharge detection interval to obtain the direct current internal resistance.

公开(公告)号：US20230411972A1

公开(公告)日：2023-12-21

申请号：US18125139

申请日：2023-03-23

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Wen-Fan Chang ,  Chun-Chieh Li ,  Chun-Wei Ma ,  Chia-Chang Chen

IPC: H02J7/00 ,  H02J7/34

CPC classification number: H02J7/0031 ,  H02J7/007182 ,  H02J7/342 ,  H02J7/345 ,  H02J2207/50

Abstract: A driving circuit applied to a protection switch of a battery module is disclosed. The driving circuit includes a reverse switch, a non-reverse switch, a capacitor, and a storing energy component. The reverse switch or the non-reverse switch is turned on or off by a PWM signal. When the PWM signal is at a high level, the reverse switch is turned off, the non-reverse switch is turned on, and the capacitor is charged via a battery total voltage to form a storage voltage on the capacitor. When the PWM signal is at a low level, the reverse switch is turned on, the non-reverse switch is turned off, a reference voltage is connected to the capacitor via the reverse switch to form a boosted voltage superimposed by the reference voltage and the storage voltage. Afterwards, the boosted voltage can be used to drive the protection switch to be turned on.

公开(公告)号：US20230420958A1

公开(公告)日：2023-12-28

申请号：US18125141

申请日：2023-03-23

Applicant: STL TECHNOLOGY CO., LTD.

Inventor： Wen-Fan Chang ,  Chun-Chieh Li

IPC: H02J7/00 ,  H01M50/574 ,  G06F1/26

CPC classification number: H02J7/0029 ,  H02J7/00711 ,  H02J7/0013 ,  H01M50/574 ,  G06F1/263

Abstract: This disclosure provides a protection circuit of a battery module. The protection circuit includes a master microcontroller, a slave microcontroller, a charging path switch, a discharging path switch, and a switch controller. When the master microcontroller is operating in a normal state, the master microcontroller periodically sends a pulse signal to the slave microcontroller, and enables the switch controller, and then the switch controller enabled may be used to control the turning on or off of the charge path switch or the discharge path switch. When the master microcontroller is operating in an abnormal state, the slave microcontroller does not receive the pulse signal from the master microcontroller, the slave microcontroller disables the switch controller so that the switch controller disabled will be unable to control the turning on or off of the charge path switch or the discharge path switch.

公开(公告)号：US20230143440A1

公开(公告)日：2023-05-11

申请号：US17865028

申请日：2022-07-14

Applicant: STL Technology Co., Ltd.

Inventor： Wen-Fan Chang ,  Chun-Chieh Li ,  Jung-Nan Chien ,  Chun-Wei Ma

IPC: H02J7/00

CPC classification number: H02J7/0031 ,  H02J7/0049 ,  H02J7/0071 ,  H02J7/007182 ,  H02J2207/20

Abstract: This disclosure provides a battery management system. The battery management system comprises a buck converter, a discharge loop, and a microprocessor. The microprocessor comprises a battery status monitoring circuit, a timer, and a controller. When the status of the battery is in a static state, the timer starts counting a time. If the time counted by the timer is greater than or equal to a time threshold, the controller controls that the buck converter executes a bucking to an output voltage of the battery, and then controls that the discharge loop executes a discharging to the battery. Accordingly, when the status of the battery is in a static state, the battery capacity can be discharged to a safe value moderately, so that the safety of the long-storage of the battery can be ensured, and the life of the battery can be prolonged.