| CPC H01M 50/249 (2021.01) [H01M 10/6554 (2015.04); H01M 50/159 (2021.01); H01M 50/169 (2021.01); H01M 50/209 (2021.01); H01M 50/222 (2021.01); H01M 50/227 (2021.01); H01M 50/231 (2021.01); H01M 50/276 (2021.01); H01M 50/293 (2021.01); H01M 50/367 (2021.01); H01M 50/503 (2021.01); H01M 50/505 (2021.01); H01M 50/516 (2021.01); H01M 2220/20 (2013.01)] | 18 Claims |
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1. An energy storage system for use in a vehicle, the energy storage system comprising:
a multiplicity of jellyroll lithium-ion cells, each having a positive pole and a negative pole;
a housing having four sidewalls, a fifth wall integrally formed with the sidewalls and an opening opposite the fifth wall, the housing defining an interior space for receiving the lithium-ion cells, wherein the housing includes plastic, and wherein a barrier layer is provided, at least in a region, between the interior space of the housing and inner surfaces of the housing which delimit the interior space, the barrier layer including a formulation of at least one of the following materials: silicon oxide, aluminum oxide, silicates, ethylene-vinyl alcohol copolymer, or magnesium, wherein the barrier layer includes a layer which is impermeable to gases in ambient air, to gases which arise in the interior of the housing during operation of the energy storage system, and to moisture in an external environment;
a cell support comprising plastic configured to receive the multiplicity of lithium-ion cells and position the multiplicity of jellyroll lithium-ion cells within the housing, the cell support being separate from the housing; and
a cover device made of a metallic material or from a metal-like substance and configured as a cooling device for regulation of a temperature of the energy storage system,
wherein the cover device is further configured to connect to the housing at a fusion weld or a pressure weld in such a way that the opening of the housing is closable, wherein the cover device includes an outer surface of the housing which is closed in this way, wherein the cover device comprises a metal cooling plate having a multiplicity of cooling fins and cooling channels, and wherein the cover device with an aid of the barrier layer provide for a hermetic closure of the opening,
wherein the energy storage system furthermore has a heat conducting element in the form of a sheet or plate, which is made of a thermally conductive and electrically insulating material and which is arranged on a surface of the cover device in a direction of the interior space of the housing,
wherein the energy storage system has at least one busbar arranged on the heat conducting element,
wherein the housing has a connecting region, which is designed to connect the housing to the cover device, said connecting region being a flange wall that is integrally formed with the sidewalls of the housing and that extends perpendicularly outward away from and lateral to the sidewalls of the housing and parallel to the cover device, wherein the barrier layer is also arranged along the connecting region in such a way that the barrier layer is not interrupted.
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