Battery Module Adhesive Standoffs for Cell-to-Cooling Plate Spacing

The patent introduces an adhesive standoff as an intermediary component between the battery cell and cooling plate. This standoff provides a controlled adhesive path that maintains sufficient thickness for electrical isolation while minimizing the overall gap for effective thermal contact. The standoff acts as a mediator that simultaneously satisfies both the cooling efficiency requirement (by maintaining small gap) and electrical isolation requirement (by providing sufficient adhesive thickness).

The adhesive standoff is pre-formed with a specific thickness before application. This preliminary preparation of the adhesive layer ensures that the electrical isolation requirement is met before the bonding process begins, eliminating the need for excessive adhesive thickness while guaranteeing sufficient insulation. The pre-formed standoff provides consistent thickness control that balances thermal and electrical requirements.

The patent segments the adhesive system into two distinct components: an adhesive standoff (pre-formed spacer) and securing adhesive (for bonding). This segmentation allows the standoff to provide the minimum necessary thickness for electrical isolation, while the securing adhesive is applied in controlled amounts to fill gaps without excessively increasing the overall thickness. This division enables precise control of adhesive thickness to balance isolation and cooling requirements.

The adhesive standoff provides localized thickness control at specific contact points between the battery cell and cooling plate. Rather than uniformly increasing adhesive thickness across the entire interface, the standoff creates localized support zones that maintain electrical isolation where needed while preserving thermal contact in other areas. This local quality approach optimizes both isolation and cooling performance.

The patent replaces permanent impregnated materials like glass beads with a disposable-like adhesive standoff that is applied temporarily during assembly and then bonded in place. The standoff serves its spacing function during assembly and becomes part of the permanent structure through bonding, eliminating the problems of bead penetration and thermal expansion mismatch. This approach provides consistent spacing without the manufacturing precision issues of embedded materials.

The patent changes the physical state and properties of the spacing material from rigid impregnated beads to a curable adhesive formulation. The adhesive standoff is applied in a workable state, maintains precise spacing during assembly, and then cures to provide permanent structural support. This parameter change from rigid to curable material enables precise thickness control and eliminates thermal expansion coefficient mismatches, achieving both spacing function and manufacturing precision.