在Nine Sights里面的有關(guān)電池的引用的一些需求描述，和之前那個BMW的類似，從需求端來說寫的還是不錯的。從2016年至今，有不少的選題其實(shí)是我們一直在研究的：
1）Battery Pack with Balancing Electronics
2）Safety Technology of Lithium-Ion Battery for Vehicles
3）Lithium-Ion Battery Modeling For Safety Verification
4）Develop a Process to Inspect Welds During Battery Manufacturing
5）Thermal Management of a Battery System
6）High Current Connection for Batteries
在這些里面首先從電連接開始談，這個項目是2016年提的，已經(jīng)過期
具體的技術(shù)要求為
這個電流現(xiàn)在看下來有些偏低Max current 400A (~10ms)
Resistance < 0.1mOhm
Lifetime ~ 15years
Temperature stable -40°C to +85°C
Joining or Pressfit components
<1 Euro per part
Ideally fit following sizes
Cell to cell size = 5mm
Module to module size = 100mm
Detachable > 5 times
Environmentally friendly materials
可行的考慮點(diǎn)為：
New materials for Al / Cu electrode endpoints
New Pressfit / joining technologies
Low resistance clips / fixers
New design concepts
2）鋰電池失效模式分析
Developing a LIB simulation model based on big data collected through a development, production or failure-analysis of the actual LIB products. Developing the LIB safety verification model that incorporates chemistry perspectives into consideration.
技術(shù)要求
Can simulate not only behaviors of LIB at charging or discharging under ordinary use but also at least one of the
following mechanisms of internal shorts in the LIB, which may cause firing of the LIB:
內(nèi)短路發(fā)生機(jī)理Occurrence mechanism of internal shorts
內(nèi)短路發(fā)生之后的鏈?zhǔn)椒磻?yīng)機(jī)理Chain mechanism where thermos runaway is caused by internal shorts
導(dǎo)致內(nèi)短路的退化機(jī)理Degradation mechanism and how such a degradation causes internal shorts
由于制程差異導(dǎo)致的內(nèi)短路機(jī)理How property variation due to manufacturing process causes internal shorts
Models of the entire LIB system are ideal but models of individual LIB cells are also welcomed.
Simply an equivalent circuit model
Simply a look up table comprised of measured data
需要仿真的機(jī)理
occurrence of internal shorts
thermos runaway caused by internal shorts
internal shorts caused by internal degradation
internal shorts caused by production or characteristics variation
把這些研究的點(diǎn)，切開成一個個課題，找到不同的辦法，然后再進(jìn)行組合，效果還是在集中研發(fā)的效果要更好一些。這種聚合的形式，特別是征求合作和意向，某種程度也是汽車產(chǎn)業(yè)里面比較缺少的。有點(diǎn)從Concept階段一步步幫著金主去做工程試驗，去做一些試錯。
小結(jié)：在依賴供應(yīng)商的階段，把現(xiàn)在把每一項課題的要求寫成SOR，而隨著自己去做設(shè)計或者做整體解決方案，就需要把大部分技術(shù)點(diǎn)分成需要實(shí)現(xiàn)的要點(diǎn)予以分解和細(xì)化，把在不同地方用過的可行的導(dǎo)入到汽車行業(yè)里面來，我覺得兼收并蓄的方式是汽車零部件技術(shù)演進(jìn)和發(fā)展的關(guān)鍵。