Hydrohertz launches Dectravalve, a patented multi-zone battery cooling system that reduces EV fast-charging instances by as much as 68% whereas bettering vary, lifespan and security by way of exact temperature management
Hydrohertz has launched what it claims is a world-first battery cooling know-how that would scale back EV fast-charging instances by as much as 68 % whereas extending battery life and bettering security.
The corporate’s patented Dectravalve system makes use of clever multi-zone valve know-how to exactly management temperatures throughout completely different elements of an EV battery pack, moderately than treating it uniformly like standard methods.
“Optimising the working temperature of an EV battery is essential to each its short- and long-term efficiency,” says Hydrohertz CTO Martyn Talbot. “In contrast to conventional methods which deal with the whole pack uniformly, the Dectravalve permits for focused heating or cooling of particular person modules throughout the battery.”
In testing performed with Warwick Manufacturing Group, a 100kWh lithium iron phosphate battery outfitted with Dectravalve maintained its hottest cell under 44.5°C with solely a 2.6°C temperature distinction throughout the whole pack throughout ultra-fast charging.
This contrasts sharply with typical fast-charging situations the place peak cell temperatures can attain 56°C and temperature variations exceed 12°C. When cells surpass 50°C, charging energy have to be decreased to stop lithium plating and long-term harm, considerably extending total cost instances.
The Dectravalve-equipped battery remained in what the corporate calls the “optimum high-power zone” all through testing, with each module acting at peak effectivity.
“In our testing, we stored battery cells inside simply 2-3°C, which interprets immediately into sooner charging, longer battery life, and critically, enhanced security,” says Talbot.
In keeping with Hydrohertz, the know-how may scale back a typical 30-minute cost on a 350kW quick charger to roughly 10 minutes, bringing EV charging instances shut to traditional refuelling. The system may additionally ship as much as 10 % extra real-world driving vary by sustaining optimum cell temperatures throughout all working situations.
“The Dectravalve solves a basic drawback of EV battery thermal administration methods – easy methods to obtain true impartial zone management of temperature with out the complexity, weight, and power waste of a number of valve arrays,” Talbot says. “Our innovation is elegantly easy: a single, digitally managed unit that may handle 4 or extra cooling zones individually.”
The system works by creating impartial cooling loops for every zone, stopping heat coolant from leaking between zones and avoiding what Talbot described as a thermal ‘domino impact’ the place hotspots unfold throughout the pack.
Security enhancements are vital, with most cell temperatures capped to stop overheating and decrease dangers of lithium plating and thermal runaway. The know-how additionally extends battery life by lowering pressure on particular person cells.
The system is chemistry-agnostic and might work with any present or future battery know-how. Hydrohertz says it provides an economical resolution in comparison with growing completely new battery packs, whereas additionally doubtlessly boosting residual values of used autos and enhancing second-life purposes for battery packs.
