公开(公告)号：US20230231407A1

公开(公告)日：2023-07-20

申请号：US18146708

申请日：2022-12-27

Applicant: Renesas Electronics Corporation

Inventor： Masaki HOGARI ,  Masaru MIYAKE ,  Yasuo USUDA ,  Youhei KENGOYAMA ,  Tetsuo MIYAUCHI

IPC: H02J7/00 ,  H01M10/42 ,  H01M10/48 ,  H01M10/44

CPC classification number: H02J7/007194 ,  H02J7/0047 ,  H01M10/425 ,  H01M10/486 ,  H01M10/443

Abstract: Provided is a semiconductor device capable of stably estimating an internal temperature of a battery. A semiconductor device coupled to a battery calculates entropy heat of the battery at a predetermined time by using a charging current of the battery and an internal temperature of the battery at a time before a predetermined time, calculates a heat generation amount of the battery from the charging current of the battery, calculates a heat radiation amount of the battery based on a temperature difference between the internal temperature at the time before the predetermined time and a surface temperature of the battery, and estimates an internal temperature of the battery at the predetermined time by using the entropy heat, the heat generation amount and the heat radiation amount.

公开(公告)号：US20210021145A1

公开(公告)日：2021-01-21

申请号：US16905119

申请日：2020-06-18

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Hironori UCHINOHAE ,  Youhei KENGOYAMA

IPC: H02J7/00

Abstract: Semiconductor device includes a controller for controlling a charging of a battery cell. When the battery cell is charged, the controller generates a voltage command value which instructs to a charger so that an upper limit value of an output voltage output from the charger is higher than a predetermined voltage which is a maximum potential voltage that the battery cell can be charged maximally.

公开(公告)号：US20200295585A1

公开(公告)日：2020-09-17

申请号：US16815723

申请日：2020-03-11

Applicant: RENESAS ELECTRONICS CORPORATION

Inventor： Tsuyoshi OTA ,  Youhei KENGOYAMA

IPC: H02J7/00 ,  H01M10/44 ,  H01M10/42 ,  H01M10/48

Abstract: To suppress the occurrence of system shutdown after long term storage of batteries. A semiconductor device comprises a control unit that controls charging and discharging of a battery cell, and a ROM that stores a power supply capability value which specifies a power supply capacity of the battery cell that can be stably supplied to an application system in which the battery pack is provided. After the battery pack returns from the sleep mode and before the transmission request of the power supply capability value is received from the system, the control [unit performs a power supply capability value updating process of updating the power supply capability value in the ROM to a value smaller than the power supply capability value before the sleep mode.