Abstract: Apparatus for heating and for maintaining temperatures in storage batteries is shown in the preferred forms of the present invention as including a T-shaped insulation blanket, a thermal cap, a thermally insulating mat, and a battery heater. The battery heater is secured to the battery by generally Z-shaped hangers and a securement strap and includes a heat exchanger connected to the cooling system of the vehicle. The heat exchanger is enclosed by a back cover telescopically received in a unit base. Ribs on the back cover and unit base create air buffers to reduce heat transfer to the battery. The thermally insulating mat is formed of a sheet having integral ribs and is of a size smaller than the bottom of the battery such that the bottom edges of the battery trap air between the ribs and beneath the storage battery to form an air barrier.

Abstract: Disclosed herein is a storage battery heat maintenance unit which in the preferred embodiment comprises an adaptor post, U-tube heating coil and cap which mount over at least one terminal post of a standard electric storage battery of the type generally used in automotive vehicles. The U-tube heating coil is connected to the liquid cooling system of the vehicle's engine thereby circulating coolant about the terminal post. Heat is thereby conducted through the U-tube heating coil, the adaptor post and through the terminal post into the storage battery. In this way the internal temperature of the storage battery is raised to high efficiency operating temperatures under cold weather conditions.