Toyota: Kansai Paint / LIB conductive carbon paste adopted: ‘Yaris’ HV battery performance improved
Kansai Paint:
The newly developed conductive carbon paste for LIB is decided to be used in the battery for Toyota’s new model “Yaris” HV.
Conductive carbon paste for LIB is a material that constitutes the positive electrode film of LIB.
For the Yaris, Toyota’s flagship compact car, a completely improved new model, was introduced to the market in February.
For LIB / conductive carbon paste:
Kansai Paint is working on another new business for conductive carbon paste.
Currently in mass production at the Nagoya office (Miyoshi City, Aichi Prefecture).
We will also start production at the Ono Plant (Ono City, Hyogo Prefecture) in response to demand.
Target sales of 2.5 billion yen by 2030.
LIB cathode film: Battery performance
The positive electrode film of in-vehicle LIB is
“Active materials such as manganese-based and nickel-based” that transfer lithium ions in and out,
A “mixture of carbon” that helps conduction of electrons is applied to the base material.
“Carbon must be dispersed so that it makes a path, and it cannot be dispersed too much.” (Hinohara R & D Headquarters Basic Research Center Director)
The connection of carbon has a great influence on the battery performance.
Conventional method:
In the past, the method of manufacturing the positive electrode film material was generally “a method in which a battery maker mixes carbon powder, an active material, a solvent, and the like all at once”.
This time method:
On the other hand, Kansai Paint has adopted “a method in which carbon and a solvent are mixed in advance to form a paste in an optimal dispersed state and supplied to the battery manufacturer.”
This created a positive electrode film with an appropriate conductive path and contributed to improved battery performance.
Positive membrane factory:
For LIB batteries that dislike foreign matter,
Adopts stricter quality control standards than general paints,
Introduced a high-performance foreign matter mixing / analysis device,
We have built a new production facility with a high degree of cleanliness, which is different from that for general paints.
“Because Yaris has a large production plan, the paint manufacturer’s mass production capability was also evaluated,” said Hinohara.
(New switch)
https://news.yahoo.co.jp/articles/8bacd7fcc7f0a77d89765ed41b0f412b447c3962
Kansai Paint Adopts new type of Yaris for lithium-ion battery material
https://www.kansai.co.jp/sites/default/files/new/press19/20200206.pdf