Multiple battery cell monitor having shared control lines and balance switch
US10326287B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 15, 2017 |
| Grant date | Jun 18, 2019 |
| Priority date | — |
| Expiry date | Jul 18, 2037 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH02J7/00308
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
Battery systems that can monitor and control multiple battery cells in electronic devices. One embodiment provides a battery system having multiple battery cells controlled by a single battery controller. Each battery cell is connected to a first end of a control path, a second end of the control path is connected to either a positive terminal or a negative terminal of the battery system. Each control path includes a charge control transistor that allows or prevents charging of a battery cell, a discharge control transistor that allows or prevents discharging of a battery cell, and a current sense resistor to sense currents into or out of a battery cell. The charge control transistor and the discharge control transistor can be controlled by control outputs provided by the battery controller. The battery controller also includes a balance switch to provide a low-impedance path between battery cells to reduce offset voltages between them.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.