It took a lot of effort to download some materials of AABA11, some of which are more important. I have made some excerpts and discussed with you readers. There are many topics here. The first one is the selection of large modules and corresponding cells defined by VW.
1) Some discussions on battery size
First from "Battery Strategy of the Volkswagen Group" Jörg Huslage
Volkswagen’s investment is shown in the figure below. At present, it is mainly concentrated on the entire battery industry chain, in-depth research on materials and batteries, and modules and packs are designed in the production stage. According to this meaning, modules will be produced in the future. The production of batteries is still a question mark.
PHEV batteries will extend from the current 10kWh to 25kWh in the future, and support power from 100kW to 200kW. EV is generally based on 4C considerations, ranging from 300-600km
Here is more interesting, the battery system listed is MEB, and the main batteries listed are all soft-packed.
The following is the 590 module, which is composed of two different forms, a wide square shell cell and a long soft pack cell.
In the form of open cell, this module can be compatible with two lengths of soft-packed cells, two short ones or one particularly long one for combination.
We can fully understand that to make such a large module is the idea of ​​the vehicle company, and it is easy to assemble. At the same time, it is also a means to increase the energy density as much as possible at the cell and module level.
In the introduction of Taekon Ko from SK Inovation, we saw these two different batteries
Comparison with the compression force between Graphite and Si-based anode in Ni-Rich NMC Cathode
Here is a comparison between the long battery cell and the power-off core. In fact, from the structural point of view, the battery core that is nearly twice as long suddenly pulls out a large technical threshold.
The problem of batteries needs to be solved at the battery level. From the system level, the advantages are obvious.
A few days ago, I saw that domestic companies were also making soft-pack batteries of different sizes and specifications, the explosive PHEV2 specifications, and the shorter soft-pack batteries that fit the sports car and this large-size soft-pack battery.
2) In addition to the size, what other work can be done to see the effect
Andreas Hintennach Mercedes-Benz "From liquid to solid: high conductivity electrolytes for lithium batteries" mainly talks about the current reality.
Summary: Looking at it so far, these contents are quite valuable for your readers' reference.
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