| Development Status and Design Ideas of Electric Vehicle Tires |
| Received:May 23, 2019 Revised:May 23, 2019 |
| DOI：10.12136/j.issn.1000-890X.2019.12.0883 |
| Key Words: electric vehicle tire；rolling resistance；wet skid resistance；noise；lightweight；SSBR；NR； silica |
| Author Name | Affiliation | E-mail | | ZENG Ji* | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | zjdut@126.com | | QUE Yuanyuan | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | | | CAI Shangmai | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | | | CAI Qing | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | | | LI Wendong | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | | | XU Li | Beijing Research & Design Institute of Rubber Industry Co.,Ltd. | | | ZHANG Junwei | Sichuan Haida Rubber Group Co.，Ltd | | | LUO Jiangang | Sichuan Haida Rubber Group Co.，Ltd | |
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| Abstract: |
| Electric vehicles are the development trend of the vehicles in the future，and so it is urgent
to develop electric vehicle tires. Electric vehicle tires require high internal pressure，low rolling resistance，
low noise，good wet skid resistance and light tire weight. By analyzing the tires with rolling resistance above
class C，it was found that the tires of low rolling resistance were featured with light weight，low hardness，
high stress at definite elongation，and small tanδ at 60 ℃. By the analysis of the tires with wet skid resistance
above class B，it was concluded that the correlation between wet skid resistance and tire weight was little，
and in the tread compound，pure solution styrene-butadiene rubber（SSBR） or its blend with a small amount
of natural rubber（NR） should be selected as the raw rubber material and the level of extending oil should
be slightly higher. Based on the analysis of mechanical properties，structural design，and compound design，
it was identified that the key problem to develop electric vehicle tires was to reduce the rolling resistance
without losing wet skid resistance，and the methods to solve that were to design appropriate tread patterns，
reduce tire weight，adopt SSBR with modified chain-ends or its blend with NR as raw rubber，use silane
coupling agent modified silica as main filler，use constant temperature mixing process for tread compound，
and apply new skeleton material such as aramid cord. |
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