By Ellen Chang Car rental companies are adding EV charging stations along with manufacturers to increase access for drivers. Hertz Global Holdings (HTZ) – Get Hertz Global Holdings Inc Report, the car rental company, is partnering with oil company BP (BP) to create their own electric vehicle charging stations in the U.S. The charging infrastructure will be powered and operated by BP Pulse, which is BP’s EV charging business. The two companies signed a memorandum of understanding and said they will open the EV charging stations to the general public as well as taxi and ride-sharing drivers. Her…