Why do EV battery systems need injection molding?

Processing EV battery system parts by injection molding also results in predictable shrinkage values during the molding procedure to ensure the right mold dimensions. Amorphous resins have clear advantages in that they experience minimal changes over a wide temperature range, and post-shrinkage is negligible.

What is an enclosed battery pack?

Enclosures made from injection molded plastics are most commonly used for battery packs. For these enclosed pack designs, two or more plastic parts are molded and then assembled with the pack and accompanied circuitry. They can be sealed using glue, mechanical fasteners (Screws) or ultrasonic welding.

Why do batteries need a case?

In other cases, battery packs are mounted externally and may serve a mechanical function, such as a handle or base for the product. At the same time the case must also protect the cells and the electronics from the harsh operating environments of temperature extremes, water ingress, humidity and vibration in which these batteries work.

How to reduce the cost of a battery pack?

The product cost can be reduced by using insert moldings in which the interconnection strips and the terminals are molded into the plastic parts to eliminate both materials and assembly costs. In some designs, the battery pack can form part of the outer case of the end product and usually requires a mechanical latch to hold the battery in place.

What is the best packaging for small batteries?

The simplest and least expensive packaging for small batteries is shrink wrap or vacuum formed plastic. These solutions are only possible if the battery is intended to be completely enclosed by the finished product. In other cases, battery packs are mounted externally and may serve a mechanical function, such as a handle or base for the product.