Redknapp is keen to add at least one centre forward to his squad before the start of the new season, with Loic Remy expected to depart the club in the coming weeks.
According to reports, the 67-year-old has set his sights on Chelsea's Senegalise striker, who is now thought to be surplus to requirements at Stamford Bridge.
Jose Mourinho is in the process of carrying out a serious overhaul on his striking ranks at Chelsea. Diego Costa is set to arrive for around £30m, and the Portuguese manager is already eyeing up other potential targets to broaden his options.
Ba signed for Chelsea in January 2013 during the managerial tenure of Rafael Benitez, but has since struggled to hold down a place in the first team scoring just five league goals for the club in two seasons, and consequently only playing a minor role on the fringes of Mourinho's first eleven.
The 29-year-old does however boast a more impressive record from his spell at Newcastle United. Ba netted 29 times in the Premier League during a one and a half season stint at the Magpies, before a release clause in his contract eventually allowed Chelsea to pounce for the striker's services.
The Senegalese international definitely still has much to offer, but needs to seek a move away from Chelsea to get his career in England's top flight back on track.
There has yet to be any official confirmation from either side regarding a possible deal, but a transfer could suit both parties well and should QPR test the Blues with a reasonable offer, they are unlikely to see it knocked back.
Ba rejected a reported £80,000-per-week switch to Loftus Road in 2012, but it's improbable that the striker would look so unkindly on such a move now should Redknapp's interest carry any weight.