Lg Chem, Ltd

Ho Sang Kwon

Seunghyun Bang

Youngsun Park

Chunyeon Kim

Young Sun Park

Soo Ryoung Kim

Chun Yeon Kim

Jae C Lee

Seung Hyun Bang

Kyung Jik Kim

Disclosed is a method for estimating a state of charge (SOC) of a secondary battery using a full charge capacity (FCC) of the battery, the method including (S1) measuring voltage and current of the battery, (S2) calculating the FCC using a voltage change and a current integral of the battery during a specific time, (S3) estimating a time remaining until the battery is fully discharged using the calculated FCC and the measured voltage and current to calculate a self-discharge rate, (S4) calculating a capacity deterioration rate of each charge cycle of the battery, and (S5) applying the calculated self-discharge rate and the calculated capacity deterioration rate to estimate the SOC of the battery.

Method and system for estimating state of charge of battery

Disclosed herein is a battery pack including a battery cell array including two or more battery cells, each of which has an electrode assembly of a cathode/separator/anode structure disposed in a battery case together with an electrolyte in a sealed state, arranged in the lateral direction, a protection circuit module (PCM) connected to the upper end of the battery cell array to control the operation of the battery pack, a pack case in which the battery cell array and the protection circuit module are disposed, and a spacer mounted between the pack case and the battery cell array to provide a space accommodating the increase in thickness of the battery cell array during charge and discharge of the battery pack.

Battery pack of compact structure

Disclosed herein is a pack case for battery packs in which a battery cell array including two or more battery cells arranged in a lateral direction and a protection circuit module (PCM) including a protection circuit to control an operation of the battery pack are mounted, the pack case including a lower case, on which the battery cell array and the protection circuit module are mounted, and an upper case disposed above the lower case so that the upper case covers the lower case to fix the battery cell array and the protection circuit module in place, wherein a lower case is partitioned into a battery cell mounting part, on which the battery cells are mounted, and a protection circuit module mounting part, on which the protection circuit module is mounted, a partition wall is formed at an interface between the battery cell mounting part and the protection circuit module mounting part, and openings, through which electrode terminals of the battery cells are exposed toward the protection circuit module, are formed at portions of the partition wall corresponding to electrical connection regions between the electrode terminals of the battery cells and the protection circuit module.

Pack case of novel structure

Disclosed herein is a battery pack including a battery cell array including three or fewer battery cells, each of which has an electrode assembly of a cathode/separator/anode structure disposed in a battery case together with an electrolyte in a sealed state, arranged in the lateral direction, the battery cells having a current capacity of 3 amperes (Ah) or more and being electrically connected in series to each other, a protection circuit module (PCM) connected to the upper end of the battery cell array to control the operation of the battery pack, the protection circuit module including a protection circuit, from which a function to adjust voltage unbalance between the battery cells is removed, and a pack case in which the battery cell array and the protection circuit module are disposed.

Battery pack containing battery cell array arranged in lateral direction

Disclosed herein is a battery pack including a battery cell array including two or more battery cells, each of which has an electrode assembly of a cathode/separator/anode structure disposed in a battery case together with an electrolyte in a sealed state, arranged in a lateral direction, a protection circuit module (PCM) connected to an upper end of the battery cell array to control an operation of the battery pack, a pack case in which the battery cell array and the protection circuit module are disposed, and a plate-shaped reinforcing member mounted between the pack case and the battery cell array to increase mechanical strength of the pack case.

Growing community of inventors

Cheongju-si, South Korea

Ho Sang Kwon