Korea Advanced Institute of Science and Technology

Sk Innovation Co., Ltd.

Samsung Electronics Co., Ltd.

Hong-Sun Park

Sang Hyun Park

Gun-Woo Moon

Joong Hui Lee

Jae Hwan Lim

Chol-Ho Kim

Young-Ho Jung

Yong-Hoon Lee

Jae-Hak Chung

Seung-Hoon Nam

Chan-Soo Hwang

Joonghui Lee

Provided are a charge equalization apparatus and method for a battery string connected in series, and more particularly, are a charge equalization apparatus and method that efficiently perform charge equalization while reducing entire complexity and volume and lowering production costs through a configuration that an individual battery included in a battery string shares a single voltage sensing module and a single charge equalizing module; a switch block of a two-stage structure forms a current path for measuring voltage of individual batteries included in the battery string, and at the same time, forms a charging or discharging path of a low-charged or over-charged battery among the battery strings; and a switch device having low withstand voltage is used.

Charge equalization apparatus and method for series-connected battery string

An automatic charge equalization apparatus using a regulated voltage source according to the present invention comprises a battery module having a plurality of batteries connected in series; a battery string having M (natural number of M&#x2267;2) battery modules connected in series: a regulated voltage source which is provided for each battery module and outputs and maintains an average voltage of the battery string; a bidirectional switch block which is provided for each battery module between the battery module and the regulated voltage source to connect each battery to an output of the regulated voltage source by forming a parallel current moving path to each battery composing the battery module; and a microprocessor controlling the bidirectional switch block, wherein each battery composing the battery module shares the regulated voltage source by the bidirectional switch block and the microprocessor controls the bidirectional switch block to successively connect the batteries composing the battery module with the regulated voltage source.

Charge equalization apparatus for series-connected battery string using regulated voltage source

A pilot designing method in an uplink OFDMA system is provided. In the uplink OFDMA system, communications are carried out in a frame divided into time-frequency lattices, and each time-frequency lattice includes a plurality of data symbol periods and a plurality of pilot symbol periods intermittently arranged with respect to the data symbol periods. The frame is divided into a plurality of blocks. The blocks are allocated to the terminals. A predetermined allocated pilot time-frequency lattice is shared between adjacent terminals.

Pilot designing method in an uplink OFDMA system

Growing community of inventors

Daejeon, South Korea

Hong-Sun Park