Abstract: A battery system including: a battery cell stack including a plurality of battery cells and a plurality of thermally isolating cell spacers between the plurality of battery cells; and a heat transfer unit on at least one side of the battery cell stack, the heat transfer unit including a first heat transfer element and a second heat transfer element, wherein the first heat transfer element and the second heat transfer element are thermally isolated from each other. The first heat transfer element contacts at least one of the battery cells in an even row of the battery cell stack and the second heat transfer element contacts at least one of the battery cells in an odd row of the battery cell stack.

Abstract: A battery system includes: a housing; a battery cell accommodated within the housing, the battery cell having a venting side with a venting exit; and a housing cover sealing the battery cell in the housing. The housing cover includes an outer layer and an inner layer, the inner layer facing the venting side and forming part of a venting channel, and the outer layer being coated on its outside surface with an anti-corrosion coating. The outer layer and the inner layer are spaced from each other such that an air gap is formed between the outer layer and the inner layer.

Abstract: A battery module includes a plurality of first battery cell groups and a plurality of second battery cell groups. Each of the first battery cell groups and each of the second battery cell groups includes a plurality of stacked prismatic battery cells. At least one of the first battery cell groups is arranged adjacent to at least one of the second battery cell groups, the first battery cell groups and second battery cell groups are alternatingly stacked, and the battery cells of the first battery cell groups are oriented orthogonally to the battery cells of the second battery cell groups.

Abstract: A battery system for an electric vehicle includes: a plurality of battery cells, each of the battery cells including electrode terminals; a busbar interconnecting the battery cells by contacting the electrode terminals; a battery housing enclosing the battery cells; and an electrically and thermally insulating cover element. The cover element covers the electrode terminals and the busbar such that the electrode terminals and the busbar are shielded from venting products exiting one or more of the battery cells towards the battery housing during a thermal runaway.

Abstract: A monitoring system for monitoring the temperature of a battery module having a plurality of battery cells, the monitoring system including an electric network including a plurality of thermistors, wherein each of the thermistors is thermally connected to a battery cell, a monitoring device that is adapted to measure a total resistance (Rtot) of the electric network including the plurality of thermistors and is further adapted to generate a signal in case of detecting that the value of the total resistance (Rtot) of the electric network traverses a predetermined threshold resistance value, wherein the monitoring system is adapted to determine a mean temperature (Tamb) of the battery module independently from the measurement of the total resistance (Rtot) of the electric network, and wherein the predetermined threshold resistance value is dependent on the mean temperature (Tamb) of the battery module.

Abstract: A battery system includes: a plurality of battery modules including a plurality of battery cells, wherein each battery module comprises a battery module monitor configured to monitor a state of the battery cells; a battery system monitor; and an optical communication system configured to connect the battery module monitors with the battery system monitor over at least two communication paths, wherein the optical communication system is configured to use at least two different wavelengths of light to differentiate between the communication paths.

Abstract: A control system for a battery system is provided. The control system includes a master controller and a slave controller using light-based communication. The master controller includes a light source and a transmission controller controlling the light source, and the slave controller includes a photo-sensitive element, a wake-up circuit, a power supply node, and a receiver circuit. The photo-sensitive element receives the light signals emitted by the light source and, in response to receiving a wake-up light signal, outputs a wake-up signal to the wake-up circuit, and in response to receiving the wake-up signal from the photo-sensitive element, the wake-up circuit connects the receiver circuit to the power supply node or to the photo-sensitive element. When the receiver circuit is connected to the power supply node and the photo-sensitive element, the receiver circuit receives an operation voltage from the power supply node and receives reception signals from the photo-sensitive element.

Abstract: A battery system includes a plurality of battery modules, each of the battery modules including a plurality of stacked battery cells and a battery module monitor (BMM) configured to monitor the respective battery cells; a battery system monitor (BSM) configured to communicate with and control the BMMs; a housing enclosing the battery modules and the BSM, the battery modules being arranged in the housing such that a swelling compensation channel is formed between the battery module and the housing; and an optical communication system (OCS) configured to connect the BSM with the BMMs via optical signals propagating along the swelling compensation channel.