caa a22 4500 475815750 CHVBK 20180406123809.0 cr unu---uuuuu 170329e20000401xx s 000 0 eng 10.1023/A:1003992027121 doi (NATIONALLICENCE)springer-10.1023/A:1003992027121 Safety and capacity retention of lithium ion cells after long periods of storage [Elektronische Daten] [S. Tobishima, J. Yamaki, T. Hirai] This paper provides the results of simple preliminary tests on the storage characteristics of lithium ion cells in relation to their use for UPS or BPS. Commercial cylindrical 18 650 size cells with a discharge capacity of around 1200 mAh were used in the experiments. The cells consisted of an amorphous carbon anode, a LiCoO2 cathode and an organic electrolyte. Cells were stored for 1-12 months and then their capacity was measured after constant voltage charging (similar to trickle charging) at 4.1 or 4.2 V and 21 or 60 °C. After measuring the capacity, the cells were crushed with a round 15 mm bar in diameter as an example of a fundamental abuse test. The residual cell capacity after 10 years of 4.2 V constant charging at 20 °C was predicted to be approximately 65%. This exceeds our tentative target of 50%. We also found that no cells smoked, ignited or exploded when crushed. We also measured the cell capacity after simple storage (i.e., after self-discharge). Kluwer Academic Publishers, 2000 lithium ion cell nationallicence rechargeable cell nationallicence safety nationallicence uninterrupted power supply nationallicence Tobishima S. NTT Telecommunications Energy Laboratories, Tokai-mura, 319-1193, Ibaraki-ken, Japan aut Yamaki J. Institute of Advanced Material Study, Kyushu University, Kasuga Koen 6-1, 816-8580, Kasuga, Japan aut Hirai T. NTT Telecommunications Energy Laboratories, 3-9-11 Musashino-shi, 180-8585, Tokyo, Japan aut Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 405-410 0021-891X 30:4<405 2000 30 10800 https://doi.org/10.1023/A:1003992027121 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1023/A:1003992027121 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Tobishima S. NTT Telecommunications Energy Laboratories, Tokai-mura, 319-1193, Ibaraki-ken, Japan aut NATIONALLICENCE 700 1- Yamaki J. Institute of Advanced Material Study, Kyushu University, Kasuga Koen 6-1, 816-8580, Kasuga, Japan aut NATIONALLICENCE 700 1- Hirai T. NTT Telecommunications Energy Laboratories, 3-9-11 Musashino-shi, 180-8585, Tokyo, Japan aut NATIONALLICENCE 773 0- Journal of Applied Electrochemistry Kluwer Academic Publishers 30/4(2000-04-01), 405-410 0021-891X 30:4<405 2000 30 10800 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer