0The　formation　processes　of　the　single-side　pasted　automotive　positive　plate　have　been　studied　by　an　in　situ　electrochemical　scan　technique.　On　the　pasted　side　of　the　positive　plate,　its　polarization　is　very　high　and　its　charge　current　is　very　low　at　the　beginning　of　the　formation,　compared　with　those　on　the　non-pasted　side.　Then,　their　difference　becomes　smaller　and　smaller　with　the　formation.　Moreover,　the　distributions　of　the　current　density　and　the　polarization　resistance　are　quite　uneven　on　the　pasted　side　at　the　initial　stage　of　the　formation.　The　lowest　current　density　and　the　highest　polarization　resistance　are　located　in　the　middle.　At　the　later　stage,　the　charge　current　on　the　pasted　side　becomes　a　little　higher,　but　its　charge　amount　is　still　lower　than　that　on　the　non-pasted　side.　Although　the　conductivity　of　PbO2　zones　is　very　good,　the　violent　charge　at　the　high　polarization　will　lead　to　the　increase　of　the　contact　resistance　between　the　active　mass　particles　at　the　beginning　of　the　formation.　(c)　2005　Elsevier　B.V.　All　rights　reserved.