English Translation (Professional Technical Version | Consistent terminology with previous texts, compliant with new energy & automotive industry standards)

BOSI delivers a comprehensive portfolio of contact springs, as well as interconnection and protection solutions for batteries and fuel cells. From high-voltage busbars and flexible connectors inside battery packs to external high-power charging sockets, our products are engineered to enhance safety, shorten charging time and extend driving range. Our solutions enable fast, reliable and safe power transmission, serving as a core guarantee for electric vehicle powertrain systems.

Scenario-based Solution 1: Design of High-Voltage Busbars

Challenge: Busbars carrying high current of hundreds of amperes are bulky and entail high material costs.BOSI Solution: We optimize materials and design in tandem, selecting high-conductivity copper or aluminum alloy. Adopting micron-level precision manufacturing, we achieve ultra-low flatness (≤ 0.05 mm) and superior connection accuracy, which ensures low contact resistance and excellent current-carrying capacity.

Scenario-based Solution 2: Flexible Connectors

Challenge: The battery breathing effect caused by repeated charge-discharge cycles of cells leads to fatigue failure at connection points.BOSI Solution: We adopt specially designed corrugated or Z-shaped structures. Acting like springs, these structures effectively absorb stress generated by vibration, thermal expansion and contraction, protect cell terminals, and greatly prolong the cycle life of battery packs. The fatigue resistance of our products has been verified via tens of thousands of reliability tests.

Scenario-based Solution 3: Contact Spring Design for High-Power Charging Sockets

Challenge: The components are subject to frequent mating and unmating, high current surges and harsh external operating environments.BOSI Solution: We use high-strength and high-conductivity beryllium copper (C17200) as the base material with silver plating. This achieves an ultra-low contact resistance (≤ 10 mΩ), alongside outstanding arc resistance and wear resistance.We optimize the geometry of contact points and adopt a multi-contact redundant design, delivering smooth mating experience and stable electrical contact. The products support a service life of more than 10,000 mating cycles.Verified through salt spray and high-low temperature cycling tests in our performance validation laboratory, our contact springs maintain stable electrical contact and excellent corrosion resistance in humid, salt-laden and other harsh environments.