The future of electromobility Bosch technologies for electric vehicles Dr. Matthias Küsell

Größe: px

Ab Seite anzeigen:

Download "The future of electromobility Bosch technologies for electric vehicles Dr. Matthias Küsell"

Klemens Geiger
vor 6 Jahren
Abrufe

1 The future of electromobility Bosch technologies for electric vehicles Dr. Matthias Küsell 1

electric motor E co omponents Inverter Inverter

2 From the hybrid to the electric vehicle Conventional combustion engine Hybrid Plug-in hybrid Electric vehicle with range extender Electric vehicle Powertrain in ncl. electric motor E co omponents Inverter Inverter Inverter Inverter Charger Charger Charger Battery HV battery HV battery HV battery HV battery 2

3 Electric vehicle: focal points of development work Enhanced efficiency Greater range Reduced cost Optimized electric motor design Regenerative braking Thermal and energy management Safety Ensure compliance with conventional automotive standards Safety concept for high h voltages Vehicle management Adjustment to vehicle dynamics control system System conformity with ISO26262 Electric powertrain performance Acceleration Climbing power Maximum speed Optimized electric motor design Improved cooling of electric motor and power electronics Improved energy density of battery Comfort Orient to standard comfort of conventional vehicles Reduction of powertrain vibration Rapid battery charge Optimized climate control 3

4 Range depends on efficiency of electrical consumers Range 200km 150km 100km 50km 0km Basic electric vehicle Low-beam headlights Low-beam headlights, wipers Low-beam headlights, wipers, heated seats Phoenix, AZ +40 A/C consumes 3kW Moscow, -10 Heating consumes 6kW heated seats 3kW consumes 6kW Basic electric vehicle: Weight 1000 kg Energy consumed by driving alone 13.8 kwh/100km Ø Engine power 4.5 kw Battery capacity 30 kwh Ø Speed 33.6 kph Drag

5 Focus: improve efficiency of vehicle as a whole Enhanced efficiency Actions Electric powertrain: Electric motor Power electronics Brake Examples Power rating Continuous torque Cooperative regenerative braking system Increased range Reduced cost Auxiliary units Thermal management & HVAC Power management Battery Vacuum-free braking system Electro-mechanical power steering Keeping passenger compartment at right temperature t Keeping components at right temperature Enhanced operating strategies by linking with navigation system (e.g. range extender) Selective shutdown of auxiliary units Progress in cell chemistry Optimize battery management system Best possible thermal management 5

Electric powertrain: development ojectives Electric powertrain

at EV-specific operating points Increased power rating through

Requirements: Limited installation space Maximum torque Maximum

6 Electric powertrain: development ojectives Electric powertrain Hybrid vehicle Optimization and enhancement Enhanced efficiency at EV-specific operating points Increased power rating through improved cooling Electric powertrain Electric vehicle (EV) Requirements: Limited installation space Maximum torque Maximum power Requirements: High efficiency at low torque Continuous and maximum torque 6

Technologies for electric motors PSM ESM Installation space smaller larger Mechanical

higher Weight lower higher PSM (permanent magnet synchronous motor) Advantages with

all separate motor generators ESM (electrically excited synchronous motor)

7 Technologies for electric motors PSM ESM Installation space smaller larger Mechanical power identical Power density higher lower Maximum torque identical Efficiency lower higher Weight lower higher PSM (permanent magnet synchronous motor) Advantages with respect to installation space, power density, and weight Mature technology, used in all separate motor generators ESM (electrically excited synchronous motor) Technological risks Strategic alternative due to high cost sensitivity of rare earth metals (neodymium) 7

Reducing the heating load for electric vehicles Thermal

vehicle Climate control as required Reduction of thermal

Reduction of energy requirements Use waste heat

management Pre-heat/pre-cool while connected to mains =

Heat recovery Heating/cooling of the passenger

8 Reducing the heating load for electric vehicles Thermal insulation Heating loa ad requireme ent [W] Conventional vehicle Climate control as required Reduction of thermal masses = EV with minimized heating load I. Reduction of energy requirements Use waste heat Components (Electric motor, battery) = EV with thermal management Pre-heat/pre-cool while connected to mains = EV with pre-heat/ pre-cool II. Heat recovery Heating/cooling of the passenger compartment can reduce battery range by 40%. Objective Reduced energy demand without significant sacrifice of comfort 8

9 Link-up with navigation system Energy-efficient route vehicle-specific energy-consumption model Route characteristics Precise and up-to-the-minute the range estimate consumption model + route characteristics visualization of current range (update as a result of traffic jams, or because heating/cooling g is on) Home Destination Support for driver in optimizing range taxiing assistant to make most of recuperation potential use of heating/cooling, influence of choice of speed Kindergarten speed limit ahead 9

Charger for high-voltage battery in EV & PHEV Status: External

is a potential "filling station" High-voltage battery recharged

global use Challenges: Mains voltages and frequencies worldwide

space, weight Service life and environmental conditions in the

high-voltage battery Standard charger for all power grids:

10 Charger for high-voltage battery in EV & PHEV Status: External charge spots not yet available on a wide scale Each power socket is a potential "filling station" High-voltage battery recharged over night or while at work Objective: "on-board" charger for global use Challenges: Mains voltages and frequencies worldwide Standards (vehicles and power grids) Efficiency, installation space, weight Service life and environmental conditions in the vehicle Use optimum charging to increase service life of high-voltage battery Standard charger for all power grids: one-phase, 3.3 kw charging capacity Bosch is developing scalable charger (3.3 3 kw, 6.66 kw, 10 kw) 10

11 Summary Bosch has integrated systems competence, and is developing all the components for electric driving, such as the electric motor, power electronics, battery (SB LiMotive), charger, and brake systems Efficiency, and how to improve it, plays a central role in the systematic optimization of the energy efficiency of hybrid and electric vehicles. Bosch parallel-strong hybrid system is already in series production Series development underway for customer projects for electric vehicles and further hybrids 11 GS-EH/MKT Robert Bosch GmbH Alle Rechte vorbehalten, auch bzgl. jeder Verfügung, Verwertung, Reproduktion, Bearbeitung,

12 Presse-Workshop Elektromobilität 12

Ähnliche Dokumente

Simulation of a Battery Electric Vehicle

Simulation of a Battery Electric Vehicle M. Auer, T. Kuthada, N. Widdecke, J. Wiedemann IVK/FKFS University of Stuttgart 1 2.1.214 Markus Auer Agenda Motivation Thermal Management for BEV Simulation Model