Battery Laser Texturing
TEXTURING FOR BONDING
Laser texturing significantly improves the bond strength compared to mechanical surface preparation techniques because it generates both chemical and mechanical changes on the surface. The system’s parameters can be optimized to generate different surface roughness levels and patterns based on each application requirements.
Laser texturing is used to clean and texture surfaces prior to enhance it’s bonding properties. For adhesive bonding applications, laser texturing provides a higher surface roughness, increasing the effective bonding surface area of the joint and its overall strength. The laser process can be configured to meet any surface roughness requirements with high accuracy and repeatability.
This technology is highly precise and can either be fully or semi- automated. It is a great alternative to other surface preparation methods such as chemicals, abrasives, and grit blasting.
Benefits:
- No abrasive media
- Lower operative costs
- Lower maintenance
- Personalized surface patterns and roughness values
- Safer
- Easily automated
- Repeatable
- No wear
- No contaminants
AGING TESTS ON BONDED ALUMINUM JOINTS
Lap shear joints bonded with BETAMATETM 4601 were subjected to aging test FORD FLTM BV 101-07. The laser texturing processes were tried against a standard Alodine treatment (Surtec 650).
Tests consists of 45 one-day cycles where lap shear joints are subjected to a salt bath and an environment chamber, all while being kept under constant stress. All of our laser textured bonded joints were able to sustain the 45-day aging test successfully, while one Alodine coupon broke on day 38. This shows that laser texturing is a better alternative to Alodine coating to prepare metallic surfaces for adhesive bonding.
| Treatment | Sample Qty | Bond Joint Failure |
|---|---|---|
| Alodine | 5 | 1 on day 38 |
| Laser Texturing | 5 | None |
TEXTURING FOR THERMAL TRANSFER
Heat diminishes the lifespan of EV batteries. The better it is managed, the longer the battery will last. The performance of the battery’s thermal management system relies on multiple square meters of surface. This allows the battery to transfer heat from cells to cooling loops. These surfaces are usually bonded with adhesives, pastes, potting components, or gap fillers.
Laser texturing can be used to generate a roughness that increases the effective surface area of metal surfaces. This additional contact between the metal and bonded component allows heat to be transferred more effectively from the cells to the cooling components.
BENEFITS:
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