Renault had 46 patents in batteries during Q3 2023. Renault SA filed patents in Q3 2023 for technologies related to electrochemical cells and secondary batteries. One patent focuses on a case design that includes ducts for cooling fluid circulation and electrical connectors. Another patent describes a secondary battery with a binder in the solid electrolyte layer to inhibit dendrite growth and maintain ion conductivity. The third patent addresses the suppression of particle destruction in the positive electrode active material of all-solid batteries, thereby preventing a decrease in battery capacity. It achieves this by controlling the particle diameters of the secondary particles, primary particles, and solid electrolyte. GlobalData’s report on Renault gives a 360-degreee view of the company including its patenting strategy. Buy the report here.
Renault grant share with batteries as a theme is 20% in Q3 2023. Grant share is based on the ratio of number of grants to total number of patents.
Application: Case for an electrochemical cell for a battery, electrochemical cell arrangement for a battery comprising such a case and method for manufacturing such a cell arrangement (Patent ID: US20230246279A1)
The patent filed by Renault SA describes a case for accommodating an active element of an electrochemical cell. The case includes at least one duct that allows for the circulation of a cooling fluid. The duct is designed to be passed through by at least one electrical connector of the electrochemical cell. The case can be a multilayer system of aluminum and polymer films, and it may consist of two shaped sheets welded together, with the walls of the duct formed by these sheets. The electrical connector is positioned between the two welded sheets.
The patent also describes an arrangement of electrochemical cells for a battery, where the active element of the electrochemical cell is housed in the aforementioned case. The electrical connectors of the cells pass through the duct, which is symmetrical with respect to at least one electrical connector. Each electrical connector consists of two plates, and the cooling fluid used is dielectric. The plates are made of polymer.
Furthermore, the patent discusses a row of electrochemical cells for a battery, where the arrangement of cells described earlier is extended continuously and/or linearly along at least one edge of the case.
The patent also covers a battery module that includes the aforementioned row of cells, with the ducts forming a cooling circuit. Additionally, a battery is described that includes at least one of these modules.
The patent further extends to a vehicle that includes the battery described earlier.
The patent also includes a method for manufacturing the arrangement of electrochemical cells for a battery. The method involves molding and heat-sealing two faces of the case to form the duct for the circulation of the cooling fluid. The electrical connectors of the cell pass through the duct. The method also includes shaping the faces of the case with trenches and housings to accommodate the active elements and electrical connectors. The first and second faces of the case are then welded together to form the arrangement or row of cells and the duct. Finally, the first and second rods used for shaping are removed.
The method may involve thermowelding or heat sealing to join the faces of the case. Additionally, fluid connections are attached at each end of the duct, and a bypass module is joined to these connections.