Abstract: A battery system includes a plurality of battery cells arranged along an alignment axis; and a cell spacer in a gap between adjacent ones of the battery cells, the cell spacer including a center portion and border portions adjoining the center portion, the center portion having a greater thickness than the adjoining border portions, wherein opposite outer surfaces of the cell spacer are arranged at the same distance but in opposite directions from a central plane, the central plane being perpendicular to the alignment axis and extending through the center portion and border portions.

Abstract: A battery pack including: a battery cell stack including a plurality of battery cells and a spacer between two adjacent ones of battery cells; and a cooler at a bottom side of the battery cell stack. The bottom side of the battery cell stack being opposite to a venting side of the battery cell stack. The spacer includes a thermally insulating core and a heat conductive structure at a lateral surface of the spacer facing a lateral surface of one of the battery cells. The heat conductive structure includes a center element arranged centrally in the lateral surface of the spacer and trajectories extending from the center element into peripheral areas of the lateral surface of the spacer.

Abstract: A battery system includes: a battery pack including a plurality of battery cells; and a cooling circuit including cooling channels for cooling the battery cells via cooling fluid flowing along the cooling channels in a flow direction. The cooling channels include cooling channel segments, each of which extends along and is thermally conductively connected to one of the battery cells. The cooling channel segments each have an upstream end at where the cooling fluid enters the cooling channel segment and a downstream end at where the cooling fluid leaves the cooling channel segment. The cooling channel segments are lined with a phase-change material (PCM) configured to melt and detach from the inner wall of the cooling channel segment when the corresponding battery cell overheats and to solidify and accumulate at the downstream end of the cooling channel segment to block the cooling fluid from leaving the cooling channel segment.

Abstract: The present disclosure refers to a temperature-sensitive housing for a battery cell, a battery module having the battery cell accommodated in the temperature-sensitive housing, a battery system using the battery module, a vehicle including the temperature-sensitive housing, the battery module, or the battery system, and a method for detecting a thermal event occurring in the battery cell equipped with the temperature-sensitive housing. The temperature-sensitive housing includes a case having an outer surface, and a coating at least partially covering the outer surface of the case, and including a temperature-sensitive material having a temperature-dependent electrical resistance.

Abstract: The present disclosure refers to a battery system. The battery system includes battery cells in a housing, a cooling circuit including a coolant channel for allowing a coolant to flow therethrough to be in thermal contact with at least a portion of the battery cells, an eddy current heater configured to heat a ferrous material by inducing eddy currents in the ferrous material, and to transfer heat to the coolant in the coolant channel, the ferrous material being inside at least a portion of the coolant channel or surrounding at least a portion of the coolant channel.

Abstract: A battery system includes at least three battery units. Each of the battery units includes a battery cell and a cooling channel segment, and the cooling channel segment forms part of a cooling circuit of the battery system. The battery units are arranged in one or more rows such that each of the battery units faces at least one of the other battery units in the same or in another row, and at least two of the battery units that do not face each other are connected in series with one another via a respective cooling channel segment.

Abstract: The present disclosure refers to a battery system (100), including a battery pack (10) including a housing (11) and a plurality of battery cells (12) accommodated within the housing (11); wherein the battery pack (10) includes a plurality of piezoelectric sensors (22, 24, 26, 28) attached to the housing (11) to detect a dimensional change of the housing (11) caused by an increased pressure inside of at least one of the battery cells (12) due to a degassing of the at least one of battery cell.

Abstract: A battery system includes a battery pack, the battery pack including a housing and a plurality of battery cells accommodated within the housing, and an underbody deformation detection system, wherein the underbody deformation detection system includes a first conductor arranged in an upper plane and a second conductor arranged in a lower plane, wherein the first conductor and the second conductor at least partially overlap in a top view, wherein the underbody deformation detection system is adapted to monitor at least one electrical measurand between the first conductor and the second conductor and to determine a deformation of the lower plane of the underbody deformation detection system.

Abstract: The present disclosure refers to a method for detecting the occurrence of a dielectric breakdown in a battery module. The present disclosure further refers to a method for disconnecting a battery module from a load upon detection of a dielectric breakdown in a battery module. Also, the present disclosure is related to a battery system with a battery module, the battery system being configured to perform the disclosed method for detecting the occurrence of a dielectric breakdown in a battery module and/or being configured to perform the disclosed method for disconnecting a battery module from a load upon detection of a dielectric breakdown in a battery module. Also, the present disclosure is related to a vehicle comprising at least one battery system according to the disclosure.

Abstract: A battery system includes battery cells in a housing; and an impact detection circuit including an electrical resistor circuit supported by a plate member that is adjacent the battery cells and including electrical brittle conductors electrically connected in parallel to each other, each electrical brittle conductor is configured to break in response to an impact causing a deformation of the electrical brittle conductor; a voltage source connected to the electrical resistor circuit and configured to apply a voltage to the electrical resistor circuit; and a detector configured to determine at least one of an electrical resistance of the electrical resistor circuit and an electrical current flowing through the electrical resistor circuit, and detect an impact on the battery system based on determining at least one of a resistance increase and an electrical current drop due to breaking of at least one of the electrical brittle conductors.

Abstract: A electric vehicle battery system includes a battery pack including battery cells accommodated within a housing and a thermal runaway detection system including a sensor unit transmitting data and a control unit receiving data therefrom, the sensor unit positioned within the battery pack and including a first cover and a second cover arranged on/connected to the first cover element to form a space therebetween, a light emitter and a light sensor arranged within the space such that light emitted from the light emitter is receivable at the light sensor via a light path that extends across the space, and the first cover element is designed to bend towards the second cover element and into the light path if a pressure in the battery pack increases, the control unit configured to detect thermal runaway based on a change in transmitted data.