Patent · US Active

Protective circuit for a rechargeable battery pack

US9267998B2 · kind B2 · utility

1Cited by

10References

24Claims

0Family size

Assignee

Andreas Stihl AG & Co. KG · DE

Inventors

Henrik Gaul · Schorndorf, DE
Martin Schurr · Mutlangen, DE

Key dates

Filing date	Dec 24, 2012
Grant date	Feb 23, 2016
Priority date	—
Expiry date	Jan 17, 2034

Classification

Technology area (CPC Y)Emerging Cross-Sectional Technologies
CPC primaryY02E60/10
WIPO fieldElectrical machinery, apparatus, energy
WIPO sectorElectrical engineering

Abstract

A protective circuit for an arrangement which includes a plurality of individual cells in a rechargeable battery pack with a predefined number of individual cells being connected in series in a cell row and at least two cell rows being situated parallel to one another. The component current flowing in a first cell row when the rechargeable battery pack is subject to loading is compared with the component current flowing in a second cell row to generate a signal when there is an implausible deviation in the component currents with respect to one smother. The signal is used to disconnect a defective cell row or to switch off the entire rechargeable battery pack in order to protect the latter.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.