The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 29, 2015
Filed:
Feb. 19, 2013
Josef Drobnik, Mesa, AZ (US);
Josef Drobnik, Mesa, AZ (US);
Freescale Semiconductor, Inc., Austin, TX (US);
Abstract
A battery equalization circuit is provided, comprising: a positive battery node connected to a positive terminal of a monitored battery cell contained in a battery circuit that includes a plurality of other battery cells connected in series with the monitored battery cell; a negative battery node connected to a negative terminal of the monitored battery cell; a secondary transformer coil configured to receive a square wave, the secondary transformer coil having an upper transformer node and a lower transformer node; an upper switch connected between the positive battery node and the upper transformer node; a lower switch connected between the negative battery node and the lower transformer control node; and a control circuit configured to control operation of the upper and lower switches based on a measured cell voltage between the positive battery node and the negative battery node, and a total battery voltage of the battery circuit.