Method for detecting a triggering of a security device
AssigneesRobert Bosch GmbH, Samsung SDI Co., Ltd.
InventorHolger Fink
Life of this patent
Estimating the term…
Abstract
The disclosure relates to a method for detecting a triggering of a security device. The security device is associated with a battery cell and is triggered if a security-critical situation is present in the battery cell. Initially an actual time path of a parameter of the battery cell is detected. At the same time, an expected time path of the parameter is determined, in particular using a model. Then, the actual time path is compared to the expected time path of the parameter. Finally, based on the comparison, it is determined whether to trigger the security device or not.
Claims9
A method for identifying triggering of a safety device, wherein the safety device is associated with a battery cell and is triggered when there is a safety-critical situation in the battery cell, comprising:
- detecting an actual time profile of a voltage of the battery cell;
- determining an expected time profile of the voltage using a model;
- comparing the actual time profile of the voltage with the expected time profile of the voltage by comparing an actual change in the voltage over time with an expected change in the voltage over time;
- and
- making a decision, on the basis of the comparison, as to whether the safety device has been triggered, the decision being made that the safety device has been triggered when the actual change in the voltage over time deviates by more than a predefined amount from the expected change in the voltage over time.
A battery comprising:
- at least one battery cell;
- at least one safety device which is associated with the at least one battery cell and is configured to be triggered when there is a safety-critical situation in the at least one battery cell;
- and
- a battery management unit configured to identify the triggering of the at least one safety device by (i) detecting an actual time profile of a voltage of the at least one battery cell, (ii) determining an expected time profile of the voltage using a model, (iii) comparing the actual time profile of the voltage with the expected time profile of the voltage by comparing an actual change in the voltage over time with an expected change in the voltage over time, and (iv) making a decision, on the basis of the comparison, as to whether the at least one safety device has been triggered, the decision being made that the safety device has been triggered when the actual change in the voltage over time deviates considerably from the expected change in the voltage over time.
An electric motor vehicle, comprising:
- a battery including at least one battery cell, at least one safety device, and a battery management unit, the at least one safety device is associated with the at least one battery cell and is configured to be triggered when there is a safety-critical situation in the at least one battery cell, the battery management unit is configured to identify the triggering of the at least one safety device by (i) detecting an actual time profile of a voltage of the at least one battery cell, (ii) determining an expected time profile of the voltage using a model, (iii) comparing the actual time profile of the voltage with the expected time profile of the voltage by comparing an actual change in a voltage over time with an expected change in the voltage over time, and (iv) making a decision, on the basis of the comparison, as to whether the at least one safety device has been triggered, the decision being made that the safety device has been triggered when the actual change in the voltage over time deviates considerably from the expected change in the voltage over time.
Dependencies are inferred from the claim text.