Nordson SEALANT EQUIPMENT

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Battery Cell Power Distribution Applications

The application of thermal interface materials or bonding between the current circuit and the battery cell module.

Bonding of Current Circuit to Battery Module

Methods:

  • Bonding to cells: Placement of beads or dots on each, or specific, battery cells to provide enough bonding coverage for the current circuit to be applied and held in place. Requires a fair amount of robotic accuracy to ensure material is in the correct place, but ensures circuit is bonded to correct location.
  • Bonding to Module: Placement of material on battery module. Less robotic accuracy needed, possibly less material as well.

Common Material Dispensed:

  • Two component curing epoxies
  • Single component epoxies, curing from heat

Common Challenges:

  • Long Beads – the length of the bead may exceed the volume of the meter, requiring the meter to reload, resulting of a gap, or overlap, in the bead.
  • Nordson Solution: Sizing the meter to the optimal size to ensure reloads are not necessary before the end of the bead. Possible continuous flow meters can be used.
  • Intricate bead paths can result in sharp turns where the robot slows down, and the meter deposits too much material.
  • Nordson Solution: Nordson’s Auto Flow Mode on Servo driven meters allows for the flow rate to be adjusted at the same rate as the robot does, this results in even material placement along the battery cell or module.

Current Circuit Thermal Interface Material

Methods:

  • Straight lines: beads are applied in simple patterns, allowing for fast application. Spread out of TIM may not be in best location
  • Swirl, or Circle patterns: beads are applied in intricate patterns, which slows speed of application, but results in better heat transfer.

Common Materials Dispensed:

  • Single component TIM grease
  • Two component TIM gels
  • Two component TIM curing materials

Common Challenges:

  • Long Beads – the length of the bead may exceed the volume of the meter, requiring the meter to reload, resulting of a gap, or overlap, in the bead.
  • Nordson Solution: Sizing the meter to the optimal size to ensure reloads are not necessary before the end of the bead.