Safety test method for determination of critical cell states by internal short provocation
AssigneeRobert Bosch GmbH
InventorsMorteza Fakhri, Simon Tippmann
Life of this patent
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Abstract
A system (10) for testing a battery cell (1) by creating at least one of the effects of internal short circuit within the cell (1) with at least one cathode, at least one anode, at least one sensor (3) and at least one conductive heating element (2), comprising at least one resistive heat element (5), wherein at least the resistive heat element (5) is assembled within the cell (1) for simulating an internal short circuit.
Claims19
A method (100) for testing a battery cell (1) by creating at least one internal short circuit within the battery cell (1), the battery cell comprising at least one cathode, at least one anode, at least one sensor (3), and at least one conductive heating element (2) that includes at least one resistive heat element (5), the method comprising the following steps:
- a) selecting at least one position within the battery cell (1) where the at least one resistive heat element (5) is to be assembled and the at least one internal short circuit within the battery cell (1) is to be created, and
- selecting a size of the at least one resistive heat element (5) corresponding to a size of real particles which can cause the at least one internal short circuit,
- b) assembling (101) the at least one cathode, the at least one anode, the at least one sensor (3), and the at least one resistive heat element (5) within the battery cell (1) during an assembly of the battery cell (1) itself,
- wherein the at least one resistive heat element (5) comprises a microheater (6) disposed within the battery cell (1),
- wherein the at least one resistive heat element (5) further includes a wire connection connecting the at least one resistive heat element (5) with a connecting contact leading to the outside of the cell,
- whereby a trigger to induce a current flow to the at least one resistive heat element (5) leads to a temperature rise,
- c) inputting (102) an internal short power by the current flow to induce activation of the at least one resistive heat element (5) thereby the temperature rise is created which is preferably in a range of approximately 200° C. to 1,500° C.,
- wherein the temperature rise creates the at least one internal short circuit at the at least one position within the battery cell (1), and
- d) determining (103) the state of the battery cell (1),
- wherein a type of the battery cell (1) is a pouch cell, a cylindrical cell or a prismatic cell.
A method (100) for testing a battery cell (1) by creating at least one internal short circuit within the battery cell (1), the battery cell comprising at least one cathode, at least one anode, at least one sensor (3), and at least one conductive heating element (2) that includes at least one resistive heat element (5), the method comprising the following steps:
- a) selecting at least one position within the battery cell (1) where the at least one resistive heat element (5) is to be assembled and the at least one internal short circuit within the battery cell (1) is to be created, and selecting a size of the at least one resistive heat element (5) corresponding to a size of real particles which can cause the at least one internal short circuit,
- b) assembling (101) the at least one cathode, the at least one anode, the at least one sensor (3), and the at least one resistive heat element (5) within the battery cell (1) during an assembly of the battery cell (1) itself,
- connection connecting the at least one resistive heat element (5) with a connecting contact leading to the outside of the cell,
- whereby a trigger to induce a current flow to the at least one resistive heat element (5) leads to a temperature rise,
- c) inputting (102) an internal short power by the current flow to induce activation of the at least one resistive heat element (5) whereby the temperature rise is created which is in a range of approximately 200° C. to 1,500° C.,
- wherein the temperature rise creates the at least one internal short circuit at the at least one position within the battery cell (1), and
- d) determining (103) the state of the battery cell (1),
- wherein a type of the battery cell (1) is a pouch cell, a cylindrical cell or a prismatic cell.
Dependencies are inferred from the claim text.