Regeneration current



The information on this page is illustrative. It is not to be used for training purposes or as guidance or instruction. It is also incomplete. A full version of this content can be found in our PicoScope 7 Automotive software, which is downloadable from here.



The purpose of the test is to check High Voltage (HV) battery charging by regeneration when the vehicle is decelerating. Only perform this test where safe access to the HV Direct Current (DC) cables is possible.

Regenerative braking test measurements.

Regenerative braking test measurements.

Further information

Regenerative braking during deceleration is critical to an EV's ability to extend its range. The range gained strongly depends on the road conditions and the driver's driving style.

The process uses an electric vehicle motor as a generator: a motor (acting as a generator) remains engaged with the drive wheels whilst there is no demand for acceleration so as to turn the kinetic energy of the vehicle into potential energy stored in the battery. The engagement of the motor creates drag on the vehicle and causes it to decelerate, hence the term regenerative braking.

The accelerator pedal and brake pedal sensors and signals in your vehicle may have different characteristics. However, the key point to note is the HV battery and inverter DC circuit current should flow in opposite directions during acceleration and braking.


This help topic is subject to changes without notification. The information within is carefully checked and considered to be correct. This information is an example of our investigations and findings and is not a definitive procedure. Pico Technology accepts no responsibility for inaccuracies. Each vehicle may be different and require unique test settings.

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Guided test: Regeneration current