What Will Change with the Second Generation of 48V … · ©2017 A123 Systems LLC. All rights...
Transcript of What Will Change with the Second Generation of 48V … · ©2017 A123 Systems LLC. All rights...
©2017 A123 Systems LLC. All rights reserved ©2017 A123 Systems LLC. All rights reserved.
Angela Duren 13-September-2017
What Will Change with the Second Generation of 48V Batteries?
©2017 A123 Systems LLC. All rights reserved
<2013 2014 2015 2016 2017 2018 2019
A123 continues to expand in low voltage
• Low voltage hybridization is a strategic focus for A123 Systems
• A123 has secured many low voltage customers globally, some with multiple programs
• This experience has enabled insights in market trends and technical requirements
12V micro hybrid
48V mild
hybrid
Start of Production
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©2017 A123 Systems LLC. All rights reserved
Low voltage li-ion batteries will reach millions of units
Moving to mainstream
• Driven by global clean air legislation, low voltage hybrids are a key part of most OEM product strategies globally
• Total annual volume of low voltage batteries produced by A123 expected to be >1M units by 2020
• A123 has established low voltage battery assembly plants in China, Czech Republic, and the US to support local customer volumes
12V
48V
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©2017 A123 Systems LLC. All rights reserved
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Micro & mild hybrid architectures
Global volume projections
China and Europe will drive the majority of volume in low voltage electrification over the next five years
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©2017 A123 Systems LLC. All rights reserved
• First generation mild hybrids supported by belt starter generators will continue to provide high levels of recuperation/ CO2 reduction for mainstream vehicles
• Next generation mild hybrids will bridge the battery functions of power supply and vehicle propulsion with more accessory loads and part-time electric driving, further increasing CO2 reduction
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Continuum of automotive battery function
Next generation 48V systems
12V SLI Plug-ins Hybrids
Mild Hybrids 48V Gen2 ACCESSORY POWER SUPPLY
VEHICLE PROPULSION Mild Hybrids
48V Gen1
©2017 A123 Systems LLC. All rights reserved
• Primary driver is fuel consumption/ emissions reduction via recuperation/ regeneration
• Belt starter generator offers up to 15kW of recuperation to support this initiative
• 48V accessory loads on some programs
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First generation systems
Source: FEV
Recuperation is the primary driver
BSG most common position in mainstream
mild hybrids in development/
launching today
First generation 48V battery requirements
OEM requirements
A123 solutions
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©2017 A123 Systems LLC. All rights reserved
CO2 Benefits from Regenerative Braking On-Cycle Benefits
• “Autonomie” software simulation
• Midsize vehicle
• Belt integrated starter generator
• Regional certification cycles
First generation (15kW) systems are already approaching the
maximum regeneration of energy available on regulatory cycles
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Does not include highway cycle offset
©2017 A123 Systems LLC. All rights reserved
• Higher power discharge requirements from 1 or 2 e-machines in the drivetrain
• Higher 48V accessory loads as more features are supported by the 48V powernet
• Combined power peaks can reach up to 25kW, more energy may be required to accommodate creeping and other engine-off features
Add part-time electric driving
Next generation battery requirements
Source: FEV
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©2017 A123 Systems LLC. All rights reserved
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Scalability of 48V battery solutions
A123 8Ah
A123 6Ah
Increasing P/E ratio
Battery makers will choose chemistry and
electrode designs which best fit each application
A123 25Ah
A123 12Ah
A123 16Ah
OEM requirements
A123 solutions
A123 concepts
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©2017 A123 Systems LLC. All rights reserved
Sources of further 48V battery requirement diversity
• Crash requirements
+ Variation in vehicle package location and safety strategies
• Methods of cooling
+ Higher energy throughput at higher power levels is driving greater heat generation during battery operation
+ Conventional liquid cooling will evolve to a refrigerant loop in some cases
+ Thermo-electric devices are also under consideration in some architectures for larger windows of full operation
• 48V for engine starting
+ As battery capacities and power levels increase, cold start requirements are progressively less difficult for the 48V battery
+ Cold cranking with the 48V battery would permit elimination of the 12V starter motor
+ This scenario is only valid for solutions including P0 or P1 motor configurations
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©2017 A123 Systems LLC. All rights reserved
• Fully integrated DC-DC converter with 48V battery + For higher power systems, components can share liquid cooling plumbing
+ Combine device management systems and CAN connection
+ Directionally correct on cost, but can OEMs package larger units?
• 48V “single battery” + One 48V battery replaces both 12V and 48V stand alone batteries
+ Reduces battery cost and complexity
+ Requires elimination of the 12V starter (robust 48V starter)
+ Requires strategy for stepping down voltage to 12V devices (DC-DC converter)
+ Solution for features where redundant power sources are required?
• Creativity on future solutions will depend on longevity of 48V mild hybrids/ growth rate of plug-ins
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Further optimization 5-10 years out
Anticipating “gen3” 48V battery requirements
©2017 A123 Systems LLC. All rights reserved
Summary
• 48V hybrids will be relied on heavily to meet ever-increasing clean air regulations
+ Europe and China are taking the early lead in regional adoption trends
+ Most early mainstream systems are driven by “P0” belt starter generators
• Next generation 48V batteries will bridge power supply and propulsion functions, further improving fuel consumption/ emissions
+ Higher power and energy features move to 48V power net, including part-time electric driving
+ Battery makers will be required to customize solutions due to diversity of power/ energy demand
+ Battery cooling and other design parameters are adding further diversity to battery requirements
• Mild hybrid battery systems can be used to further optimize mild hybrid architectures
+ Reducing/ consolidating components within the 48V architecture is under investigation
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