EnergyBus Communication Protocol 1.0 Released

Laws & Regulations

Ready for the future? Kach of Panasonic asked after presenting the first charger using the EnergyBus. This new standard for electric components of Light Electric Vehicles (LEVs) consists of a communication protocol and a connector set.


HSINCHU, Taiwan – “Ready for the future?” Kaché of Panasonic asked after presenting the first charger using the EnergyBus. This new standard for electric components of Light Electric Vehicles (LEVs) consists of a communication protocol and a connector set.

The charger operates with the now final version 1.0 of the protocol, written in CAN open and contains a plug that forms a core element of the upcoming EnergyBus connector set. Alongside the charger, a battery build by TD Hitech was presented at the EnergyBus workshop in Hsinchu Science Park, Taiwan on 13 March 2011.

Battery and charger belong to the ’Impuls’ pedelec which will be operating with EnergyBus only. Together, they form a milestone for EnergyBus, being the first products using the standard in serial production.


This might become a decisive moment for the whole LEV industry. Currently about 58 manufacturers of pedelecs account for 99 brands piling up to 73 different chargers. With EnergyBus this number may go down to one. Instead of every manufacturer being either dependent on the producers or forced into developing ‘standards’ on their own, investing a lot of time and money, a standard like EB offers the freedom to concentrate on what one does best, be it software, engines, batteries, human interfaces or vehicles.

EnergyBus is designed as an open standard. To get access to the full protocol and connector specifications one simply has to become a member of the association.


President of EnergyBus organization Dr. Mo-Hua Yang greeted the audience of the workshop enthusiastically, saying that the presentation is a “milestone for the future of EnergyBus and the LEV industry”.

The communication protocol 1.0 itself was introduced by Holger Zeltwanger of CAN in Automation (CiA). Based on machine language CAN open, the protocol defines the language and grammar EnergyBus compatible components use. The protocol basically follows “rules of human communication”, Zeltwanger emphasizes. Hence, it enables devices to talk, work together and rule out misunderstandings. Practically, this means interoperability of all components that use, or so to say, ‘speak’ EnergyBus.

The Panasonic charger applies this protocol and comes with an additional USB port. The max. current output is 7A with a power rating of 300W. At this rate, it charges a 10Ah/36V battery within 1,5h. Marketing manager of Panasonic Industries Europe, Kaché, further underlined the importance of a standard in the face of numerous plugs, that are “mechanically compatible, but not electrical” and regards this “a dangerous mix.”

The presented charging plug is magnetic, a feature often believed to be a Macintosh patent, but is actually licensed and developed by Rosenberger. The connector comes with current ratings of 10, 30 or 50A and specified continuous power at a flex voltage of 12 to 48 V. It features 2 additional communication pins (making it 4) as well as 2 pins for 12 V/2A assistance power lines. Mass production at Rosenberger is scheduled for April 2011. The specifications are open however, so other EnergyBus members like Odu, Singatron and IMS might follow suit.

The Swiss ‘Impuls’ pedelec embodies EnergyBus’ core: effective innovation through cooperation. Three members (Panasonic for charger, TD Hitech for battery, Electragil for motor and sensor) have concerted their efforts to put together a vehicle that is operated with EnergyBus only. Gerry Schneider of Electragil reflects that “Now (with the protocol defined) the decision to use EnergyBus pays off, because only now, we can move and apply new features incredibly fast.”

About EnergyBus

EnergyBus is designed as an open standard, which means that anyone who becomes a member of the organization can use the EnergyBus specifications and network. Companies like Bosch, Sanyo, Panasonic, Philips, BionX, Varta and more already joined the non-profit association.

EnergyBus enables electric components to exchange energy as well as information, using only one connection. This means, that single components can easily be interchanged and therefore combined freely. The EnergyBus Standard shall become for the LEV industry, i.e. manufacturers of e-scooters, pedelecs, e- bikes, what USB is for the IT industry.

For the future of e-mobility, EBS is currently the only existing option for a public infrastructure, where vehicles of all manufacturers can be charged safely – using one connector standard. The EnergyBus scope shall be widened in the future to cover not only LEVs, but bigger energy networks and devices.

More at



Comment on this article