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Adhesives for BMS and battery integrated busbars shall be selected according to circuit board moisture resistance, FPC & PI bonding, solder joint reinforcement, UV curing speed and shadow-area curing requirements.

For fast conformal coating of BMS circuit boards, Elaplus UV Coating 9060M is available for evaluation; UV 1013 is suitable for integrated busbar and solder joint reinforcement; UV 1034 is the choice for FPC-to-PI bonding; UV SI 3301 delivers wide-temperature-range performance, flexible protection and supplementary curing in shadow areas.

Why Do BMS Require Conformal Coating Protection?

The BMS undertakes collection of cell voltage, temperature and current data. Once circuit corrosion, loose solder joints or reduced insulation occur, judgment of battery status may be adversely affected.

Common risks for BMS and integrated busbars include:

Condensation inside battery packs
High-low temperature cycling
Long-term vibration of FPC
Cracks at solder joints and sampling terminals
Salt spray and ionic contamination
UV-light blind zones at the bottom of components
Insufficient adhesion between FPC and PI substrates

Therefore, BMS protection is not merely applying a layer of conformal coating. It also covers FPC fixation, integrated busbar reinforcement and stress buffering for solder joints.

Recommended Grades for BMS Circuit Board Conformal Coating

UV Coating 9060M: UV & Moisture Dual-Cure Conformal Coating

UV Coating 9060M is a low-viscosity UV & moisture dual-cure material. Its viscosity specified in the datasheet is approximately 190 cps, with operating temperature ranging from -65℃ to 125℃.

Suitable applications:

Selective conformal coating on BMS circuit boards
High-takt automated spraying
Moisture and corrosion protection for battery control boards
Densely populated PCBs with shadow areas

Exposed areas achieve fast UV curing; component bottoms and shaded regions complete secondary curing via moisture.

Recommended Grades for Integrated Busbar Reinforcement

UV 1013: Fast UV Cure Reinforcement Adhesive

UV 1013 is a one-component UV curable adhesive with viscosity around 20,000 cP. Typical curing time under 365 nm UV light is approx. 10 seconds as specified in the datasheet.

Recommended applications:

Integrated busbar reinforcement
FPC solder joint fixation on busbars
Securing the root of sampling terminals
Reinforcement of wiring harnesses and connection points
Production processes requiring rapid UV positioning

Recommended Grades for FPC & PI Bonding

UV 1034: Adhesive Specially for FPC & PI Bonding

UV 1034 is a UV curable adhesive featuring good adhesion compatibility with FPC and PI substrates.

FPC Solder Joint Fixation

Recommended applications:

Fixation of battery sampling FPC
Bonding between FPC and plastic brackets
Local reinforcement of PI flexible boards
Structural fixation around NTC sensors
Connection zones of flexible printed circuits

Recommended Grades for Wide-Temperature-Range BMS Conformal Coating

UV SI 3301: UV & Moisture Dual-Cure Silicone

uv 2081

UV SI 3301 is a low-viscosity UV & moisture dual-cure silicone elastomer. Its viscosity listed in the datasheet is roughly 800 cP, with operating temperature from -55℃ to 200℃.

Suitable applications:

New energy vehicle BMS
Energy storage BMS
FPC subjected to high-low temperature cycling
Circuit boards demanding highly flexible coating films
PCBs with complex shadow zones

Note: On other PCB-related pages of the datasheet, the similar grade is written as UV SIPC 3301. Please confirm the full model name against the latest TDS before official release and quotation.

Elaplus battery solutions adopt UV Coating 9060M, UV 1013, UV 1034 and UV SI 3301 respectively for BMS conformal coating, integrated busbar reinforcement, FPC/PI bonding and wide-temperature silicone protection.

Comparison of Adhesive Grades for BMS and Integrated Busbars

Application Location	Recommended Grade	Core Characteristics
BMS Circuit Board Conformal Coating	UV Coating 9060M	Low viscosity, UV & moisture dual cure
Integrated Busbar Reinforcement	UV 1013	Fast curing under 365 nm UV light
FPC & PI Bonding	UV 1034	Excellent adhesion to flexible board substrates
Wide-Temperature Flexible Conformal Coating	UV SI 3301	Silicone system, -55℃ ~ 200℃ operating range

UV Coating 9060M is recommended for high-takt production lines and circuit boards with complex structures. UV 1013 can be evaluated for rapid reinforcement of integrated busbars and solder joints. UV 1034 is selected for bonding FPC and PI materials. UV SI 3301 is the preferred option when wider temperature range and flexible coating films are required.

FAQ about BMS Conformal Coatings

Is potting still needed after applying conformal coating on BMS?

Conformal coatings mainly provide thin-film surface protection. Partial or full potting may still be required if overall waterproofing, structural fixation or high-voltage insulation is needed.