Element Energy, Inc.

Lg Electronics Inc.

Yoosok Saw

Rainer Johannes Fasching

Seth Marshall Kahn

Corrado Cammi

Anthony John Stratakos

Arnaud Devie

Georgy Zerkalov

Anderson Rennie John

Jongseok Park

Younghoon Lee

Eunyoung Kim

Chulbae Lee

Jinhae Choi

Hyunghoon Oh

Andy Kim

Described methods and systems are used for in-situ impedance spectroscopy analysis of battery cells in multi-cell battery packs. Specifically, the cell impedances are determined while the pack continues to operate, such as being charged or discharged. For example, the pack voltage/power output remains unchanged while this analysis is initiated, performed, and ended. Cell impedance is determined based on the cell's response to the signal applied to the cell. For example, a current through the cell is charged while monitoring cells' voltage response. Although the power output of the changes during this testing, but the operation of the pack is not impacted due to the power compensation provided by one or more other cells in the pack thereby ensuring uninterrupted operation of the pack. This in situ testing is provided by the unique architecture of the pack, comprising multiple nodes and individual node controllers.

Methods and systems for in-situ impedance spectroscopy analysis of battery cells in multi-cell battery packs

Described methods and systems provide in-situ leakage current testing of battery cells in battery packs even while these packs operate. Specifically, an external electrical current is discontinued through a tested battery cell using a node controller, to which the tested battery cell is independently connected. Changes in the open circuit voltage (OCV) are then detected by the node controller for a set period time. Any voltage change, associated with taking the tested cell offline, is compensated by one or more other cells in the battery pack. The overall pack current and voltage remains substantially unchanged (based on the application demands), while the in-situ leakage current testing is initiated, performed, and/or completed. The OCV changes are then used to determine the leakage current of the tested cell and, in some examples, to determine the state of health of this cell and/or adjust the operating parameters of this cell.

Methods and systems for on demand in-situ leakage current testing

Methods and systems for in-situ leakage current testing of cells in multi-cell battery packs

A mobile terminal including a wireless communication unit configured to wirelessly communicate with at least one other terminal; a sensing unit configured to sense tapping gestures; a memory configured to store a matching of a plurality of actions to perform with a plurality of tapping gestures; and a controller configured to display a first execution screen on a display unit corresponding to a first function executing on the mobile terminal, and perform a first action on the first function matched with a first type of tapping gestures and perform a second action different than the first action on the first function matched with a second type of tapping gestures.

Mobile terminal receiving tap gesture on empty space and control method thereof

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Seoul, South Korea

Yoosok Saw