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首页> 外文会议>Charging amp; infrastructure symposium 2018 >High Durability of LTO/NCM Battery for 14 V System at 80℃
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High Durability of LTO/NCM Battery for 14 V System at 80℃

机译：LTO / NCM电池在80℃时具有14V系统的高耐久性

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摘要

Low voltage system such as 12 V and 14 V battery is required thermal stability because the battery pack is put under high temperature environment in a car. LTO-based lithium ion battery has high temperature durability since the decomposition of liquid electrolyte unlikely occur at the working potential of LTO at around 1.55 V vs. Li /Li[+]. Furthermore, LTO-based battery shows excellent charge acceptance performance due to no lithium plating at quick charging. Therefore, LTO-based battery combined with 4 V-class cathode is suitable for 12 V and 14 V system. We reported that improvement of high temperature durability of LTO-based battery by using polyacrylonitrile (PAN) binder. It has been reported that conventional PVdF binder was deteriorated at high temperature of 80℃. We attempted to improve the high temperature durability of LTO-based battery by using a therrmally stable polymer as a binder. LTO-based batteries are degraded due to the deterioration of cathodes. Therefore, it is effective that a thermally stable polymer is applied to a binder of the cathode. Li-ion battery with LTO anode was constructed with NCM cathode. PAN was applied to a binder of the NCM cathode. The LTO/NCM cell showed a high capacity retention of 94.2 % after 10 C cycling between 20-80%SOC under a high temperature condition of 80℃ for 3000 hours which correspond to 11500 cycles. High temperature storage test was also carried out. The recovery capacity of the LTO/NCM cell stored at 100 %SOC at 80℃ for 3000 hours were kept high of 96.2 %. Moreover, gas generation was negligible during 80℃ operation. These results exhibited the LTO/NCM cell using PAN binder excellent high temperature durability. It is considered that PAN binder suppressed the decomposition of liquid electrolyte at the surface of the NCM cathode and the degradation of the NCM particle surface. LTO-based battery has outstanding high temperature performance and enables the battery pack to reduce the cooling system. The battery pack with LTO-based cells is suitable for low voltage systems.
机译：需要低电压系统（例如12 V和14 V电池）的热稳定性，因为电池组被放置在汽车的高温环境中。基于LTO的锂离子电池具有较高的高温耐久性，因为在LiTO / Li [+]约为1.55 V的情况下，在LTO的工作电位下液体电解质的分解不太可能发生。此外，基于LTO的电池由于在快速充电时没有镀锂，因此具有出色的充电接受性能。因此，结合了4 V级正极的LTO基电池适用于12 V和14 V系统。我们报道了通过使用聚丙烯腈（PAN）粘合剂改善了LTO基电池的高温耐久性。据报道，传统的PVdF粘合剂在80℃的高温下会变质。我们试图通过使用热稳定的聚合物作为粘合剂来改善LTO基电池的高温耐久性。基于LTO的电池由于阴极的劣化而劣化。因此，将热稳定的聚合物施加到阴极的粘合剂上是有效的。具有LTO阳极的锂离子电池由NCM阴极构成。 PAN应用于NCM阴极的粘合剂。 LTO / NCM电池在80-℃的高温条件下，在20-80％SOC之间10 C循环10小时后，表现出94.2％的高容量保持率，相当于11500个循环。还进行了高温存储测试。 LTO / NCM电池在80％的100％SOC下储存3000小时的恢复能力保持在96.2％的高水平。此外，在80℃的操作中，气体的产生可以忽略不计。这些结果表明使用PAN粘合剂的LTO / NCM电池具有优异的高温耐久性。认为PAN粘合剂抑制了NCM阴极表面上的液体电解质的分解和NCM颗粒表面的劣化。基于LTO的电池具有出色的高温性能，使电池组能够减少冷却系统。具有基于LTO的电池的电池组适用于低压系统。

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  • 会议地点 Mainz(DE)
  • 作者

    Keigo Hoshina; Tetsuro Kano; Hidetoshi Watanabe; Asako Sato; Tetsuya Sasakawa; Mitsuru Ishibashi; Norio Takami;

  • 作者单位

    Toshiba Infrastructure Systems Solutions Corporation, Industrial and Automotive Systems Division, 931-21, Karuigawa, Kashiwazaki-shi, Niigata, 945-1396 Japan;

    Toshiba Infrastructure Systems Solutions Corporation, Industrial and Automotive Systems Division, 931-21, Karuigawa, Kashiwazaki-shi, Niigata, 945-1396 Japan;

    Toshiba Infrastructure Systems Solutions Corporation, Industrial and Automotive Systems Division, 931-21, Karuigawa, Kashiwazaki-shi, Niigata, 945-1396 Japan;

    Toshiba Infrastructure Systems Solutions Corporation, Industrial and Automotive Systems Division, 931-21, Karuigawa, Kashiwazaki-shi, Niigata, 945-1396 Japan;

    Toshiba Corporation, Corporate Research and Development Center, 1, Komukai-Toshiba-cho, Saiwai-ku, Kawasaki, 212-8582 Japan;

    Toshiba Corporation, Corporate Research and Development Center, 1, Komukai-Toshiba-cho, Saiwai-ku, Kawasaki, 212-8582 Japan;

    Toshiba Corporation, Corporate Research and Development Center, 1, Komukai-Toshiba-cho, Saiwai-ku, Kawasaki, 212-8582 Japan;

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