Electric car batteries and drive technology.

How electric car batteries work.

The benefits of electric drive.

BMW Electric car Electric drive vs internal combustion engine

The battery-powered electric motor delivers powerful acceleration.

Unlike traditional combustion engines, electric motors transfer energy directly to the wheels from the motor, delivering power with less delay.

BMW Electric car Regenerative braking vs conventional braking

Regenerative braking charges the battery.

Cars with an electric motor have a regenerative braking system. Electric motors transfer energy from the battery to power the wheels, and when braking this energy is transferred back to the battery. This is known as energy recovery or recuperation.

The BMW electric car battery. Good to know.

Capacity, charging power or weight. Lots of terms are used with electric car batteries. A brief overview.

BMW Electric car Energy package
BMW Electric car Battery performance
BMW Electric car Battery weight

Electric car batteries are essentially energy packs.

Batteries of electric cars are mobile energy stores. Electric car batteries consist of a large number of battery cells. These cells are charged with electricity from the charging station and transfer it to the electric motor. The amount of energy an electric car battery can store in kilowatt hours (kWh) is calculated from the number and energy content of the cells, often expressed in the form of its capacity. The charging power in kilowatts (kW) indicates how quickly an electric car will charge at the charging station.

An electric car battery is very powerful.

An electric car battery works in principle rather like a mobile phone battery, although it is much bigger and more powerful, with a longer service life. An intelligent heat management system keeps the electric car battery at an optimum operating temperature. On the one hand, this protects it from excessively high temperatures when high power is called for when driving. On the other hand, it ensures the shortest possible charging times for your BMW.

Battery weight is linked to its range.

The larger the electric car battery, the more energy it can store. This increases its range, but also its weight. An electric car battery can weigh several hundred kilograms. Continuously improved technology and increasing energy density are extending the range without adding more weight to the electric car battery. BMW is also contributing to this with its Battery Cell Competence Centre.

A long service life is the inherent value of an electric car battery.

The electric car battery is equally as valuable and important as an engine in a combustion car. Amongst other things, the price of an electric car battery depends on its capacity. In short, the more energy an electric car battery can store, the more it costs. However, drivers can have a positive impact on the service life of an electric car battery by adapting their own driving behaviour. Built-in functions also help to protect it.

BMW Electric car optimise battery lifetime

How to positively impact the service life of your electric car battery.

An electric car battery has been developed with the greatest care, however, range and charging performance decline somewhat over time in line with a normal ageing process. This is known as the State of Health (SoH). This term expresses the maximum energy capacity of a used electric car battery compared to a new one. A lower SoH equates to a shorter range. But you can maximise the service life of the battery with careful treatment and a cautious driving style.

Recommendations to optimise the service life of your electric car battery.

How the electric car battery retains its high energy level.

An electric car battery is designed for all kinds of everyday driving situations, but is still subject to physically induced ageing. To avoid time-related aging of the battery, it is best to avoid consistently high states of charge and high battery temperatures when the vehicle is parked. To avoid cyclic aging (aging due to high numbers of charging and discharging cycles), it is best to adopt an anticipatory driving style and moderate charging power.

BMW Electric car Ageing process

Long-term experience using the example of the BMW i3.

The durability of BMW electric car batteries is demonstrated by our pioneering electric car, the BMW i3. We have been observing the aging process of its electric car battery since launch in 2013. Even prior to the launch of the i3 during its development, we analysed the aging process by simulating it in complex driving and charging tests.

BMW Electric car Battery-care handling

Best prerequisites for newer BMW generations.

Compared to current models, the early BMW i3 models had very small electric car batteries. But, thanks to technical advances and bigger batteries, newer BMW electric car generations are once again better equipped to deal with aging.

The structure of an electric motor. Explained simply.

BMW Electric car Electric drive
BMW Electric car Benefits current-excited synchronous motor
BMW Electric car Permanent magnet synchronous motor
BMW Electric car Simple technology

How an electric drive works.

An electric motor converts current into movement. It has two key components: the rotor and stator. As its name suggests, the rotor rotates. This occurs by the interaction of the magnetic field of the rotor and stator. The rotor’s magnetic field is generated by magnets or current, depending on the type of motor. The electric motor transmits this turning motion to the wheels through a 1-speed transmission. When you look at the driving cycle (WLTP), the efficiency of an electric motor is more than three times that of a combustion engine. BMW electric vehicles are often fitted with very efficient separately excited synchronous motors, so-called SSMs.

Benefits of separately excited synchronous motors (SSM).

A core competence at BMW is its widespread use of SSMs. These motors are distinguished by dispensing with the use of “rare earth elements” in the rotor. Compared to other types of motor, SSMs feature efficient power characteristics and also accelerate well at high speed. This is useful when overtaking on the motorway. SSMs also have efficient consumption. As they magnetise the rotor with current, they either work efficiency-optimised or power-optimised, depending on the situation.

Benefits of permanently excited synchronous motors (PSM).

A PSM design of electric motor boasts a high power density. Within a given space, it can generate comparably high levels of power. Technically, it differs from an SSM in that it generates the magnetic field in the rotor differently, by producing it by permanent magnets. A PSM is therefore ideal for integration into the transmission of Plug-in Hybrid Electric Vehicles (PHEVs) and M-PHEV (BMW XM) vehicles.

Simple engineering. Simple to drive.

A BMW electric car accelerates directly. Without the need to use the clutch and shift gear. Unlike a combustion engine, an electric motor makes its power available even more immediately. Its torque is high and almost constant in the lower speed ranges. At higher speeds, the electric motor can summon its full power at any time. Unlike with a combustion engine, its speed does not need to be adjusted by changing gear.

Driving an electric BMW. A unique experience.

An electric BMW drives offers a unique electric driving experience, whilst still feeling like a BMW. When you step on the pedal, the car accelerates immediately, powerfully and with excellent modulation, with a precise pedal feel when braking. BMW electric cars also have a low centre of gravity due to the battery being located in the underbody, allowing for impressive roadholding.

Why an electric car accelerates so quickly.

The use of a 1-speed transmission means your electric BMW accelerates seamlessly without shifting. Torque is immediately there when you depress the accelerator pedal. When you take your foot off the pedal, your BMW slows down just as readily, depending on your preference and your selected energy recovery setting.

How a BMW brakes with intelligent recuperation.

The brake system of an electric BMW analyses braking situations for maximum efficiency and makes use of the full recuperation potential of the electric motor. If need be, the conventional brake system is also activated. This intelligent interplay recovers maximum energy, is gentle on the brakes and reduces brake particle emissions.

Electric car price comparison.

BMW i5 eDrive40 Sport Edition Touring
BMW i5 eDrive40 M Sport
BMW i4 eDrive40 Sport
BMW i7 xDrive60 Excellence
 BMW i4 M50
BMW i5 M60 xDrive
BMW i5 M60 xDrive Touring
BMW i7 M70 xDrive
    • BMW i5 eDrive40 Sport Edition Touring

    • From £69,945.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      326 - 340 miles

    • DC charging time (10-80% state of charge)[3]

      30 min

    • BMW i5 eDrive40 M Sport

    • From £74,105.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      312 - 356 miles

    • DC charging time (10-80% state of charge)[3]

      30 min

    • BMW i4 eDrive40 Sport

    • From £59,365.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      319–368 miles

    • DC charging time (10-80% state of charge)[3]

      0:30 min

    • BMW i7 xDrive60 Excellence

    • From £115,735.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      366–387 miles

    • DC charging time (10-80% state of charge)[3]

      0:34 min

    • BMW i4 M50

    • From £70,900.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      289–318 miles

    • DC charging time (10-80% state of charge)[3]

      0:30 min

    • BMW i5 M60 xDrive

    • From £97,745.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      284–315 miles

    • DC charging time (10-80% state of charge)[3]

      0:30 min

    • BMW i5 M60 xDrive Touring

    • From £99,995.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      280 - 310 miles

    • DC charging time (10-80% state of charge)[3]

      0:30 min

    • BMW i7 M70 xDrive

    • From £164,320.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      334–343 miles

    • DC charging time (10-80% state of charge)[3]

      0:34 min

BMW iX2 xDrive30 M Sport
BMW iX xDrive40 M Sport
BMW iX1 eDrive20 Sport
iX3
BMW iX M60
    • BMW iX2 xDrive30 M Sport

    • From £57,445.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      259 - 266 miles

    • DC charging time (10-80% state of charge)[3]

      29 min

    • BMW iX xDrive40 M Sport

    • From £73,985.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      251–264 miles

    • DC charging time (10-80% state of charge)[3]

      0:31 min

    • BMW iX1 eDrive20 Sport

    • From £46,205.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      275–293 miles

    • DC charging time (10-80% state of charge)[3]

      0:29 min

    • iX3

    • From £65,160.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      290 - 292 miles

    • DC charging time (10-80% state of charge)[3]

      31 min

    • BMW iX M60

    • From £124,605.00

      Illustrations show optional equipment at an additional cost. The prices given are non-binding, non-cartelized recommendations from the manufacturer including VAT and standard consumption tax (NOVA) based on the base model without optional equipment, excluding transfer costs. Errors and omissions excepted. Binding price information can be obtained from your BMW partner.

    • Electric Range (WLTP)[2]

      338–348 miles

    • DC charging time (10-80% state of charge)[3]

      0:35 min

Questions and answers about batteries and electric motors.

More information.

BMW electric car range

Electric range. 

Our electric cars have a range that easily allows you to travel longer distances. The route planner will show you where you can charge your car while on the road.

BMW Electric car Charging

At home or on the go.

Charging is very simple. Conveniently at home from your own power supply or flexibly on the go, for instance at fast-charging stations. The charging network continues to grow and there are more and more new solutions for charging at home as well.

Important information and disclaimers.

[1] These figures were obtained after the battery had been fully charged. There is a new test for fuel consumption, CO2 and electric range figures. The electric range shown was achieved using the new test procedure. Figures shown are for comparability purposes. Only compare fuel consumption, CO2 and electric range figures with other cars tested to the same technical procedures. These figures may not reflect real life driving results, which will depend upon a number of factors including the starting charge of the battery, accessories fitted (post-registration), variations in weather, driving styles and vehicle load.

[2] Range depends on various factors, in particular: individual driving style, route characteristics, outside temperature, heating/air conditioning, pre-conditioning.

[3] The charging performance depends on the state of charge, ambient temperature, individual driving profile and use of auxiliary consumers. The ranges shown are based on the WLTP best case. The charging times apply to ambient temperatures of 23 degrees Celsius after a preceding drive and may differ depending on the usage behaviour.