The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Nov. 12, 2024
Filed:
Jan. 19, 2021
Nisshinbo Micro Devices Inc., Tokyo, JP;
Takayasu Yoshikawa, Itami, JP;
NISSHINBO MICRO DEVICES INC., Tokyo, JP;
Abstract
A charge and discharge control circuit controls charge and discharge of a secondary battery connected between a positive electrode power supply terminal and a negative electrode power supply terminal by using a discharge control switching element and a charge control switching element connected between the secondary battery and a load or a charger and includes a charger connection detector circuit that generates a charger connection detection signal, based on a voltage of an external negative electrode terminal connected to the charger; and a pull-up detector circuit that detects a pull-up of the voltage of the external negative electrode terminal, based on the voltage of the external negative electrode terminal, and generates a pull-up detection signal. The charge and discharge control circuit turns off the discharge control switching element, and then, turns on the same after receiving the pull-up detection signal and the charger connection detection signal.