ABB Technology Ventures co-led a round including Chevron that increased sodium-ion battery developer Natron's lifetime funding to more than $70m.

US-based advanced battery technology developer Natron Energy raised $35m yesterday in a series D round co-led by ABB Technology Ventures, the strategic investment arm of power and automation technology producer ABB.

Corporate-backed battery technology fund Volta Energy Technologies and venture capital firm NanoDimension Capital co-led the round with ABB. It also featured oil producer Chevron and VC firms Khosla Ventures and Prelude Ventures.

Founded in 2012 and formerly known as Alveo Energy, Natron is developing a battery storage system that…