Battery protection circuit, method for protecting battery, power supply device and program
US8461807B2 · kind B2 · utility
Assignees
Inventors
Key dates
| Filing date | Mar 25, 2010 |
| Grant date | Jun 11, 2013 |
| Priority date | — |
| Expiry date | Oct 22, 2030 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
A reusable period of a battery can be maintained for a long time by recharging while avoiding abnormal heating of the battery due to over discharge. A battery protection circuit comprises a control part that cuts off a discharge switch which is a discharge path to a load for a battery when a voltage value of the battery is equal to or less than a first threshold value, or when the voltage value of the battery is less than the first threshold value, wherein the control part cuts off a power switch as a power supply path to the control part itself when the voltage value of the battery is equal to or less than a second threshold value, or when the voltage value of the battery is less than the second threshold value which is lower than the first threshold value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.