Battery: E60, E61, E63, E64

Installation location 

The battery is installed in the right-hand side of the luggage compartment.

Example: E60

Fig 1: Locating Battery: E60, E61, E63, E64

Courtesy of BMW OF NORTH AMERICA, INC.

Construction 

The capacity of the battery installed depends on the engine used and the equipment installed in the vehicle. Selection criteria for the required capacity are:

• the cold-start characteristics of the engine
• the off-load current consumption of the vehicle
• the energy requirements of the auxiliary consumers, such as the independent heater, telephone, etc.

How it works 

To guarantee that the battery works as well as is possible, the power management continuously measures the exact battery charge state and battery condition.

To determine the current battery condition, the IBS feeds the necessary information to the power management. The battery is continuously monitored by the intelligent battery sensor (IBS), regardless of the vehicle's operating state.

When charging and discharging the battery, the operating temperature is a key factor, besides the charging voltage. The following illustration shows how charge voltage U develops as a function of the battery temperature T.

Fig 2: Identifying Battery Charge State And Battery Condition: E60, E61, E63, E64

Courtesy of BMW OF NORTH AMERICA, INC.