| Presentation | 2013-01-24 Lifetime characteristics and safety of lithium-ion cells for telecommunications Tomonobu TSUJIKAWA, Kahou YABUTA, Masayasu ARAKAWA, Koji HAYASHI, |
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| PDF Download Page |  PDF download Page Link |
| Abstract(in Japanese) | (See Japanese page) |
| Abstract(in English) | To make large-capacity lithium-ion (Li-ion) battery backup power sources for telecommunications equipment, we have been investigating how to improve safety and lifetime. In the backup power supply of a communication system, many large-capacity Li-ion cells are maintained in a standby state which is almost fully charged by constant voltage charging, so a long lifetime and a high level of safety must be ensured. In this examination, the 200-Ah cell was fabricated with an electrolyte composed of phosphazene flame retardant added to a base electrolyte and with a cathode material in which part of the elemental manganese was replaced with magnesium. Life tests were performed. The results showed a lifetime of 10 years or more can be expected with float charging. Safety tests were performed under the assumption of telecommunications backup use. The results showed no explosion or ignition. |
| Keyword(in Japanese) | (See Japanese page) |
| Keyword(in English) | Lithium-ion battery / Flame retardant / Long life / Large-capacity / Safety tests |
| Paper # | EE2012-36,CPM2012-158 |
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| Conference Information | |
| Committee | EE |
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| Conference Date | 2013/1/17(1days) |
| Place (in Japanese) | (See Japanese page) |
| Place (in English) | |
| Topics (in Japanese) | (See Japanese page) |
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| Paper Information | |
| Registration To | Energy Engineering in Electronics and Communications (EE) |
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| Language | JPN |
| Title (in Japanese) | (See Japanese page) |
| Sub Title (in Japanese) | (See Japanese page) |
| Title (in English) | Lifetime characteristics and safety of lithium-ion cells for telecommunications |
| Sub Title (in English) | |
| Keyword(1) | Lithium-ion battery |
| Keyword(2) | Flame retardant |
| Keyword(3) | Long life |
| Keyword(4) | Large-capacity |
| Keyword(5) | Safety tests |
| 1st Author's Name | Tomonobu TSUJIKAWA |
| 1st Author's Affiliation | NTT Facilities, Inc() |
| 2nd Author's Name | Kahou YABUTA |
| 2nd Author's Affiliation | NTT Facilities, Inc |
| 3rd Author's Name | Masayasu ARAKAWA |
| 3rd Author's Affiliation | NTT Facilities Research Institute Inc |
| 4th Author's Name | Koji HAYASHI |
| 4th Author's Affiliation | Shin-Kobe Electric Machinery Co, Ltd |
| Date | 2013-01-24 |
| Paper # | EE2012-36,CPM2012-158 |
| Volume (vol) | vol.112 |
| Number (no) | 396 |
| Page | pp.pp.- |
| #Pages | 5 |
| Date of Issue | |