Method for Detecting Electrical Fault States in a Removable Battery Pack and System for Carrying out the Method

A system comprising:

• a removable battery pack including (i) a first monitoring unit, (ii) at least two temperature sensors, (iii) a first electromechanical interface having a first plurality of electrical contacts, and (iv) at least one energy storage cell;
• and
• an electrical device including a second monitoring unit and a second electromechanical interface having a second plurality of electrical contacts,
• wherein in each of the first and the second plurality of electrical contacts (i) a first electrical contact is configured as an energy supply contact that can be supplied with a first reference potential, (ii) a second electrical contact is configured as an energy supply contact that can be supplied with a second reference potential, (iii) a third electrical contact is configured as a signal or data contact for data exchange between the first and the second monitoring units, and (iv) a fourth electrical contact is configured as a signal or data contact for transmitting a temperature signal of a corresponding one of the first and the second temperature sensors to the second monitoring unit, and
• wherein the system is configured to detect an electrical fault state of the at least one energy storage cell, the system configured to:
• evaluate a first measured temperature value of the at least one energy storage cell measured by a first temperature sensor of the at least two temperature sensors using the first monitoring unit;
• and
• essentially simultaneously, in the electrical device, evaluate a second measured temperature value of the at least one energy storage cell measured by a second temperature sensor of the at least two temperature sensors using the second monitoring unit.

A removable battery pack comprising:

• at least one energy storage cell;
• a monitoring unit;
• a first temperature sensor;
• a second temperature sensor operably connected to the monitoring unit;
• and
• an electromechanical interface having a plurality of electrical contacts configured for connection to an electrical device,
• wherein the plurality of electrical contacts includes (i) a first electrical contact configured as an energy supply contact that can be supplied with a first reference potential, (ii) a second electrical contact configured as an energy supply contact that can be supplied with a second reference potential, (iii) a third electrical contact configured as a signal or data contact of the monitoring unit, and (iv) a fourth electrical contact configured to monitor the at least one energy storage cell and configured as a signal or data contact of the first temperature sensor.