Rapid Developmentof

Large Li-Ion Battery Packsusing

Off-the-ShelfBattery Management Systems

9/27/09, 1,

Custom or COTS?

Custom design you own you control

Commercial off-the-shelf (COTS) fast easy little development

9/27/09, 2,

Custom or COTS?

Ownership [%]

Cost & manuf. control [%]

Devel. cost [$k]

Devel. time [months]

Staff [people]

Learning curve [man-weeks]

Cost in qty [10$ / unit]

-200 -150 -100 -50 0 50 100

Off-the-shelfCustom

9/27/09, 3,

BMS chips

9/27/09, 4,

Cell selection

Small cylindrical Pouch

Large cylindrical Prismatic

9/27/09, 5,

Topology selection

Centralized Modular

Master-slave Distributed

9/27/09, 6,

Complexity selection

Simple analog go/no go dumb 2.5~10 $ / cell (20 cells)

Sophisticated digital detailed reports smart 10~20 $ / cell (100 cells)

9/27/09, 7,

GenasunBlade EVs

Complexity selection

Simple Sophisticated

9/27/09, 8,

Sophisticated BMSs

9/27/09, 9,

AMERICAN EV

Master-slave

"---"120 cells

9/27/09, 10,

BLACK SHEEP

Master-slave

"Stack V1"32 cells

"Stack V1"32 cells

9/27/09, 11,

BLACK SHEEP

Master-slave

"Cage V2"96 cells

"Cage V2"

9/27/09, 12,

BLACK SHEEP

Master-slave

"Mini V3"unlimited

9/27/09, 13,

CONVERT THE FUTURE

Centralized

"Flex BMS48"48 cells

9/27/09, 14,

ELITHION

Distributed

"Lithiumate"256 cells

9/27/09, 15,

ELITHION

Distributed

"Lithiumate"256 cells

9/27/09, 16,

ELITHION

Distributed

"Lithiumate"256 cells

9/27/09, 17,

ELITHION

Distributed

"Lithiumate"256 cells

9/27/09, 18,

GENASUN

Distributed

"GLD"24 cells

9/27/09, 19,

LITHIUM BALANCE

"C series"24 cells

Centralized

9/27/09, 20,

NINGBO YANGMIN

"BMS40"100 cells

Master-slave

9/27/09, 21,

KJ HALL

"PACKTRAKR"24 cells

Master-slave

9/27/09, 22,

PETER PERKINS

Distributed

"-"255 cells

9/27/09, 23,

REAP

Modular

"-"168 cells

9/27/09, 24,

PRICES

9/27/09, 25,

1021.5441815419801

46.415175831379499.9976974414163

215.436854745787464.141070947642

100

215.443467349599

464.158876236176

999.99997697415

2154.4346238883

4641.58865548523

9999.999539483

Elithion (1st one)Ningbo YangmingGenasunBlack sheepReapConvert the futureAmerican EVElithion (100s)Lithhium balanceKJ HallPeter Perkins

Number of cells

Co

st [U

SD

]

9/27/09, 26,

COMPARISON TABLE

Simple BMSs

9/27/09, 27,

EV Power

9/27/09, 28,

Distributed