Panasonic Develops High Energy Lithium-ion Battery Module with High Reliability

Oct 01, 2009

Panasonic Corp. has developed a 1.5 kWh battery module from 18650-type (18 mm in diameter x 65 mm in length) lithium-ion battery cells, which are widely used in laptop computers, to provide energy storage solutions for a wide range of environmentally friendly energy technologies. For example, multiple units can be connected in series and/or parallel to store energy generated by home-use photovoltaic (PV) systems and fuel cells, and power electric vehicles (EV).

A prototype of the new module will be shown at CEATEC JAPAN 2009 (Makuhari Messe, October 6-10, 2009) and New Energy Industry Fair Osaka (Intex Osaka, October 7-9, 2009).

Amid rising environmental concerns such as CO2 emissions, great expectations are placed on widespread use of renewable energy technologies such as and commercialization of electric vehicles to alleviate the concerns. However, these technologies require storage systems to become commonplace in daily life. Among a number of technologies, storage systems using lithium-ion batteries in particular are considered promising and practical, because such systems are lighter and have greater capacity than those using other types of rechargeable batteries.

As applications of the storage systems using lithium-ion batteries increase, there will arise demand for such systems with higher capacity, output, reliability and safety as well as improved cost performance. Flexibility in voltage and capacity will also be required according to the application.

Panasonic's compact and high-energy module meets such demands. The module having a volume of approximately 7 L and weighing 8 kg has a voltage of 25.2 V and a capacity of 58 Ah. By connecting a plurality of this module, users can construct battery packs for a variety of applications such as home storage and electric vehicles.

The high-energy module is constructed from 140 pieces of 18650-type cells - seven serially connected rows with each row made of 20 parallel connected battery cells. This structure allows for avoiding serious loss in the system performance such as system shutdown even if some individual cells fail.

Panasonic has a proven record in the production of the 18650-type lithium-ion batteries which are highly reliable and safe, and offer good cost performance. The company has already developed and commercialized a 18650-type lithium-ion battery which has the industry's highest level of capacity.

To achieve the innovative module, Panasonic employed a high-capacity and high-durability cell technology using its proprietary nickel-based positive electrode material. Other technologies used include its cell safety technology that uses a heat-resistant insulating layer between the positive and negative electrodes to prevent short circuits and thermal runaway (overheating) which can be caused when foreign particles get mixed into the battery cell. The new module also uses Panasonic's design technology to ensure reliability by minimizing the effects on power supply if a trouble occurs in some of the cells contained in the module.

On the new battery module, Panasonic holds 38 patents in Japan and 22 in other countries including pending applications.

Source: Panasonic

Explore further: Minimally invasive surgery with hydraulic assistance

add to favorites email to friend print save as pdf

Related Stories

Toshiba's 'NanoBattery' Recharges In Only One Minute

Mar 29, 2005

Toshiba Corporation today announced a breakthrough in lithium-ion batteries that makes long recharge times a thing of the past. The company's new battery can recharge 80% of a battery's energy capacity in ...

Energy Storage For Hybrid Vehicles

Aug 14, 2008

Hybrid technology combines the advantages of combustion engines and electric motors. Scientists are developing high-performance energy storage units, a prerequisite for effective hybrid motors.

Recommended for you

Desktop device to make key gun part goes on sale in US

7 hours ago

The creator of the world's first 3D plastic handgun unveiled Wednesday his latest invention: a pre-programmed milling machine that enables anyone to easily make the core component of a semi-automatic rifle.

Minimally invasive surgery with hydraulic assistance

13 hours ago

Endoscopic surgery requires great manual dexterity on the part of the operating surgeon. Future endoscopic instruments equipped with a hydraulic control system will provide added support during minimally ...

Analyzing gold and steel – rapidly and precisely

15 hours ago

Optical emission spectrometers are widely used in the steel industry but the instruments currently employed are relatively large and bulky. A novel sensor makes it possible to significantly reduce their size ...

More efficient transformer materials

15 hours ago

Almost every electronic device contains a transformer. An important material used in their construction is electrical steel. Researchers have found a way to improve the performance of electrical steel and ...

Sensor network tracks down illegal bomb-making

15 hours ago

Terrorists can manufacture bombs with relative ease, few aids and easily accessible materials such as synthetic fertilizer. Not always do security forces succeed in preventing the attacks and tracking down ...

Miniature camera may reduce accidents

15 hours ago

Measuring only a few cubic millimeters, a new type of camera module might soon be integrated into future driver assistance systems to help car drivers facing critical situations. The little gadget can be ...

User comments : 1

Adjust slider to filter visible comments by rank

Display comments: newest first

Bob_Wallace
1 / 5 (1) Oct 02, 2009
Put this article together with a news item out today and it sounds like things have improved for EVs.

"Japan's Panasonic Corp (6752.T) said on Thursday it has developed a technology that binds together standard lithium-ion battery cells used in laptop PCs to power electric vehicles, taking aim at growing demand for green cars.

The new technology will likely enable Panasonic to make electric car batteries at half the cost of lithium-ion batteries that are developed solely for electric cars, since it can use existing battery plants and production expertise, the company said."

Half the cost.

http://www.reuter...20091001