China New Energy Auto Focuses On LiFePO4 Battery
Author: Source: Datetime: 2016-10-18 17:10:54
Trend towards high specific energy battery development direction is obvious. At present, China is still new energy vehicles lithium iron phosphate-based, according to the Ministry of motor vehicle product announcements statistics, in 2015 the proportion of applications of new energy vehicles lithium iron phosphate in 69%, the proportion of ternary material use lithium-ion batteries 27%. Select the battery material system diversified trend, seeking boost battery energy density is inevitable. The new energy vehicles can be solar powered portable generator. On the one hand the development of the use of new phosphate cathode materials for lithium-ion batteries, increase the operating voltage and energy density, energy density up to 180Wh / kg or more; the other hand, the development of nickel, cobalt and manganese lithium three yuan cathode materials for lithium-ion battery , significantly increasing energy density, energy density up to 250Wh / kg or more, the ternary material lithium-ion battery as an important direction of development worth the wait.
Battery safety need to focus on. Battery security issues seriously affect the promotion of new energy vehicles and general consumer confidence in the use. The current use of lithium iron phosphate and ternary materials, lifePo4 batteries, the first through the material and surface coating doped and battery design so as to improve the safety of cell body; Secondly, from the perspective of the battery system design considerations improvements, such as hot design and structural design by BMS management, and even to improve the safety of the battery system control strategy applied by the vehicle. Ternary materials for lithium ion batteries, the risk of security problems which occurred (such as fire and explosion, etc.) is more serious than the lithium iron phosphate, as well as from design and manufacturing system design aspects of the cells, should be concerned about security design and verification.
Battery standardization is imperative. From the perspective of large-scale production considerations, should battery power (including battery module) standardization and normalization as possible, both to support enterprises of different vehicle models, it can also reduce the cost of large-scale production of batteries, but also in favor of cascade utilization of battery power. We should pay close attention to the development of power battery normalized (with battery module) of the relevant standards.
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