Patent ID: 8237406
Filing Date: 2012-08-07
Classification: H02J

Abstract:
1. A battery array voltage equalization device comprising: a plurality of serially-connected batteries, wherein each battery has a positive electrode and a negative electrode; a sampling unit coupled to the battery array for sampling the voltage signals of the battery array; an analog-to-digital converting unit coupled to the sampling unit for converting the sampled voltage signals into a digital voltage signal; a control unit coupled to the analog-to-digital converting unit for generating a sampling control signal to control the sampling unit and a driving signal based on the digital voltage signal; an equalization unit for generating an equalization signal for equalizing the voltage signal of the battery array based on the driving signal; and a filter unit coupled to the equalization unit for applying the equalization signal to the battery array, wherein the equalization unit includes multiple pairs of switch component and energy dissipation circuit, each pair of switch component and energy dissipation circuit for controlling the voltage of a respective battery and the switch component further including a first output terminal, a second output terminal, and one or more controlling ports; wherein the controlling ports of the switch component are coupled to the control unit, and the first output terminal of the switch component is coupled to the positive electrode of the respective battery through the energy dissipation circuit and the second output terminal of the switch component is coupled to the negative electrode of the respective battery.