DENSO Develops Lithium-ion Battery Pack for Stop/Start System

DENSO Develops Lithium-ion Battery Pack for Stop/Start System 
- Further increases fuel efficiency on vehicles with stop/start - 
Kariya, Japan, Oct 4, 2012 - (JCN Newswire) - DENSO Corporation has developed a
lithium-ion battery pack that further increases the fuel efficiency of vehicles
with stop/start systems. DENSO's new battery pack allows the stop/start
system to use more regenerative power than current conventional systems that
use a single lead-acid battery. DENSO's battery pack consists of a battery
management unit and power supply control switch, as well as battery cells that
are provided by a third-party source. 
Improved Fuel Economy
 DENSO's new lithium-ion battery pack stores regenerated power and then
supplies the stored regenerated power to the electrical and electronic
components, such as the car navigation and audio systems. This reduces the
power generation required by the alternator, which results in an overall load
reduction on the engine and improves the vehicle's fuel economy. 
Compact and Lightweight Battery Allowing for Increased OE Design Flexibility
 The new battery pack is naturally air-cooled and therefore does not require a
dedicated battery cooling system. Because there is no need for auxiliary
cooling components, this allows the battery to be lighter and more compact.
This enables automakers more design flexibility, which is important for
vehicles with limited space. 
DENSO Stop/Start Available Technology 
DENSO has developed different types of starters to meet the specific needs of
its customers for their stop/start systems, including the Advanced Engagement
(AE) Starter, Permanently Engaged (PE) Starter, and Tandem Solenoid (TS)
Starter. Also, DENSO developed a Cold Storage (CS) Evaporator which increases
the effectiveness of idle-stop, particularly at high temperatures. 
DENSO supplies the lithium ion battery pack, the TS starter and Cold Storage
Evaporator on the Suzuki Wagon R, which Suzuki Motor Corporation launched to
market earlier this month. DENSO will continue its efforts to expand these
technologies to other automakers and other regions in the world. 
About the Battery Pack Components 
1.DENSO Battery management unit 
DENSO Battery Management Unit monitors and controls the voltage of the
lithium-ion battery cells to maintain the proper charge level to protect them
from overcharge and over-discharge. 
2.Power supply control switch 
Depending on the operational status of the vehicle, this device controls the
charging of the battery cells by the energy captured during deceleration and
braking. It also controls the amount of power supplied to the car navigation,
audio, and other systems during driving. 
3.Battery cells 
High-power rechargeable lithium-ion battery cells, which have a higher energy
density and charge more quickly than lead-acid batteries, can efficiently store
more regenerated power quickly to vehicle's electronic and electrical
Dimensions: 200 x 178 x 70 mm (length x width x height)
Weight: 2.5 kg 
About Denso 
DENSO Corporation, headquartered in Kariya, Aichi prefecture, Japan, is a
leading global automotive supplier of advanced technology, systems and
components in the areas of thermal, powertrain control, electric, electronics
and information and safety. Its customers include all the world's major
carmakers. Worldwide, the company has more than 200 subsidiaries and affiliates
in 35 countries and regions (including Japan) and employs over 120,000 people.
Consolidated global sales for the fiscal year ending March 31, 2012, totaled
US$38.4 billion. Last fiscal year, DENSO spent 9.5 percent of its global
consolidated sales on research and development. DENSO common stock is traded on
the Tokyo and Nagoya stock exchanges. For more information, go to, or visit our media website at 
Sadayoshi Yokoyama, Goro Kanemasu
Phone: 81-566-25-5594
Fax: 81-566-25-4509 
Copyright 2012 JCN Newswire. All rights reserved. 
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