Balancing device and electrical storage device
US10110021B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jan 21, 2014 |
| Grant date | Oct 23, 2018 |
| Priority date | — |
| Expiry date | Mar 26, 2035 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T90/14
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
There is provided a balancing device that equalizes voltages between storage cells of a battery composed of a plurality of series-connected storage cells or voltages between electrical storage modules composed of a plurality of series-connected storage cells of the battery. The balancing device equalizes voltages between the energy storage modules by transferring electric power between the electrical storage modules through an element to which all of the electrical storage modules are connected, the transferring being realized by on-off control of current supply to each of the electrical storage modules, the on-off control being performed with a first duty cycle. Further, the balancing device introduces a period in which the on-off control is performed with a second duty cycle, the second duty cycle being different from the first duty cycle. Furthermore, the balancing device measures a voltage applied to each of the capacitance elements C1 and C2 which connect between the terminals of the electrical storage modules respectively. Furthermore, the balancing device determines the presence of an open circuit in lines which connect the capacitance elements C1 and C2 and the electrical s…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.