Development and Applications of Modular ProductStrategy for Cobasys NiMHax? Product Line of HEVBattery Systems

摘要

As it continues its push towards therncommercialization of high power, Nickel MetalrnHydride battery systems for Hybrid ElectricrnVehicle applications, Cobasys has developed arnflexible modular product strategy to meet thernneeds of today’s automotive and heavy dutyrntransportation applications.rnThis paper describes the development processrnand system integration methodology used torndevelop “plug-and-play” solutions for HEVrnbattery systems including a series of highrnvoltage and 42V hybrid electric vehicle batteryrnsystems. The products cover the range ofrntransportation application needs from mild hybridrnand full hybrid cars, trucks, and SUV’s, to largernindustrial/commercial hybrid applications suchrnas buses, delivery vans and military vehicles.rnPerformance data and application examples arernalso provided.rnThe battery systems incorporate all necessaryrnfeatures to enable “plug-n-play” capability forrnmost customer needs. System features includernfully integrated battery management systemrnhardware and software, safety devices,rnpackaging, wiring, and integral or optionalrnthermal management based on newly developedrnliquid cooling systems for optimizedrnperformance in high power HEV applications.rnFully integrated control algorithms were alsorndeveloped and implemented to help optimize thernenergy management functions and productrndurability.The product strategy focused on development ofrnone standard system architecture, two systemlevelrntechnologies and three core systemrnproducts which combined resulted in over 10rnapplication-specific solutions. Integration ofrnheavy duty bus/truck requirements into arnstandard modular battery system product was arnkey driver. Furthermore, the Cobasys teamrnintegrated the technical requirements fromrnseveral leading HEV integrators, which posed arnunique challenge to the development team.rnNominal voltage was selected for 3 corernproducts: 144V, 288V and 336V in order tornsatisfy the maximum number of marketrnapplications and to provide compatibility withrnexisting electric powertrain motor and inverterrnsolutions. The above core products are beingrnused in combinations of series and parallel wiredrnpacks to enable the application of 576V andrn672V packs with power capability from 30kW torn240kW and energy storage capability from 1- 12rnkWh to satisfy a wide range of applications. Inrnaddition, air-cooled 42V products wererndeveloped, providing 7-15kW options for mildrnhybrids.rnThe development of the described productrnstrategy is a key factor enabling thernimplementation of HEVs in global markets andrnenhances market development in heavy dutyrnbuses, trucks, off-road equipment as well asrnmilitary applications.