Changes

Companies with most many patents of HEV battery patents are arranged in decreasing order in below the graphgiven below. Top three players are Nissan motors with (5) patent records to its credit, followed by Toyota with (4) and Acqueous (3).

The below left graph given below displays the assignee wise IP activity over years, according to the present data the very first patent pertaining to HEV battery charging system was filed by HYBRICON in 1978 but is not in the race anymore. Though NISSAN, AQUEOUS and TOYOTA seems to be ahead in acquiring max. number of patent to their credits, but not active since 2000. GM and HONDA have bagged a single-single patent of same age in 2003.

The below right graph given below displays the market (countries) eyed by various competitors. The hot market place for most competitors is Japan (17) followed by United States (11) and Germany (04). According to the present data , Nissan seems to be having strong presence in Japan market than rest that rests with 5 patents protected, followed by Aqueous and Toyota.

We will look in to into their technologies in competitor approaches section coming latter in the report.

* Type Types of HEV (Series (SHV)/Parallel (PHV)/Composite (SPHVS))

* Technology Technological strength based on citation analysis

* '''Battery charging system''': The charge to a the DC-battery is provided by from the generating power from a generated by the generator and the regeneration powerfrom power from the drive motor at the time of braking.

* Patent and non-patent information indicate that Nissan’s Nissan has focused much on circuit arrangements for charging or depolarizing batteries or for supplying loads from batteries (H02J 7/00).