Heating element and circuit managing equivalent series resistance of energy storage cell
US10826133B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Nov 21, 2017 |
| Grant date | Nov 3, 2020 |
| Priority date | — |
| Expiry date | Dec 30, 2037 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/10
- WIPO fieldElectrical machinery, apparatus, energy
- WIPO sectorElectrical engineering
Abstract
An apparatus and method of keeping an energy storage cell at or above a target temperature, includes receiving at a processing circuit, an analog voltage that is proportional to a temperature of the energy storage cell, converting, at the processing circuit, the analog voltage to a pulse-width-modulated signal having a duty cycle that is proportional to the analog voltage, and driving a switch, with the pulse-width-modulated signal, between conductive and non-conductive states to modulate a voltage passing across (or a current flowing through) a heating element in series with the switch, the heating element being in thermal communication with the energy storage cell, wherein the duty cycle of the pulse-width-modulated signal is adjusted to maintain the temperature of the energy storage cell at or above the target temperature.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.