Battery control circuit for multiple cells employing level shift circuits to avoid fault
US10594146B2 · kind B2 · utility
Assignee
Inventor
Key dates
| Filing date | Aug 29, 2017 |
| Grant date | Mar 17, 2020 |
| Priority date | — |
| Expiry date | Nov 2, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A battery control circuit that is used for a battery protecting apparatus configured to protect a secondary battery in which cells are connected in series includes: a level shift circuit configured to shift respective levels of cell voltages of the cells to generate level shift voltages; a maximum voltage output circuit including differential amplifier circuits for the respective level shift voltages, the respective differential amplifier circuits being configured to compare the corresponding level shift voltages with threshold voltages to generate output voltages, the maximum voltage output circuit being configured to simultaneously compare the output voltages to output a maximum voltage corresponding to a cell voltage whose voltage value is highest; an overcharge detecting circuit configured to detect overcharging of the secondary battery based on the maximum voltage; and a maximum voltage cell specifying circuit configured to specify, based on the output voltages, a cell whose voltage value is highest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.