Cover assembly for a battery cell of an electrical energy store of an at least partially electrically operated motor vehicle, housing, and battery cell

The cover assembly and housing design for prismatic battery cells address cooling challenges by using angled busbars and thermal interface materials to enhance heat dissipation and electrical insulation, improving charging efficiency and safety.

WO2026119574A1 Publication Date: 2026-06-11MERCEDES BENZ GROUP AG
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Patent Information

Application Number
PCT/EP2025/083582
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-12-06
Filing Date
2025-11-19
Publication Date
2026-06-11

AI Technical Summary

Technical Problem

Existing battery cell designs face challenges in cooling current busbars due to limited space integration, high contact resistance leading to increased Joule heat, and difficulty in integrating active cooling methods, particularly for prismatic battery cells.

Method used

A cover assembly and housing design for prismatic battery cells that includes angled busbars and thermal interface materials to facilitate efficient heat conduction and dissipation, with busbars angled for optimal cooling and electrical insulation, and a thermal interface material between the busbar and inner surface.

Benefits of technology

Enhances cooling efficiency, reduces charging times, and improves safety by preventing thermal propagation, allowing higher currents without overheating, and enabling reliable electrical energy supply.

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Abstract

The invention relates to a cover assembly (36) for a battery cell (16) of an electrical energy store (12) of an at least partially electrically operated motor vehicle (10), having an outer side (38), which faces a cooling device (22) of the electrical energy store (12), and having an inner side (40), which is located opposite the outer side (38) and which faces a cell winding (20) of the battery cell (16), wherein at least one busbar (32) is formed on the inner side (16) and is designed to receive electrical energy from the cell winding (20), the busbar (32) being cooled via the cooling device (22). The invention also relates to a housing (18) and to a battery cell (16).
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