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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(xiàng)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(yàn)，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(xiàng)課題的要求寫成 SOR，而隨著自己去做設(shè)計(jì)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。

NineSights里面一些與電池有關(guān)的設(shè)計(jì)需求

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