GWM-affiliated Svolt releases 3.5-generation charging tech and 245 Wh/kg semi-solid-state batteries for 2026
Great Wall Motor-affiliated battery supplier Svolt Energy has released its 3.5-generation ion oscillation pulse charging technology, confirming a 25 percent reduction in full charging time without increasing battery system costs. The announcement was made on January 13, 2026, during Svolt Energy’s sixth Battery Day event in China, according to IT-Home. The company confirmed that the technology will enter mass-production vehicle applications in the third quarter of 2026.
Svolt Energy stated that the newly released charging technology represents an iteration of its existing charging process rather than a change in battery chemistry or cell structure. The update was positioned as a charging-methodology upgrade intended for integration into customers’ new-vehicle platforms scheduled for launch in 2026.
According to Svolt Energy, power battery charging methods have progressed through several technical stages, including constant-current, constant-voltage charging; step charging; multi-factor integrated charging; and terminal pulse charging. The 3.5-generation ion oscillation pulse charging technology builds on these earlier approaches by further refining current control and charge sequencing.
The company explained that the charging system uses intelligent current adjustment combined with intermittent relaxation phases. This process enables lithium ions within the battery to oscillate and redistribute more evenly, resulting in more uniform intercalation into the anode material during charging.
Svolt Energy disclosed that, compared with its second-generation charging technology, the 3.5-generation ion oscillation pulse charging system shortens full charging time by approximately 25 percent. The company stated that this improvement does not increase battery manufacturing or system costs.
According to information released at the event, the technology has completed more than 20,000 hours of cumulative testing. Svolt Energy said the testing focused on charging performance stability and operational consistency, without disclosing vehicle-level charging power figures.
Svolt Energy confirmed that the technology will be installed on multiple mass-production models based on customers’ new-vehicle platforms, starting in the third quarter of 2026. The company did not disclose the names of automakers, vehicle segments, or battery capacities involved.
In addition to 3.5-generation charging technology, Svolt Energy is preparing to begin volume production of its first-generation semi-solid-state batteries (also known as liquid-solid-state batteries) in 2026. These batteries, which combine liquid and solid electrolyte features, have an energy density of approximately 270 Wh/kg and have already been installed in small batches on European passenger vehicles. The company also announced a medium-nickel semi-solid-state battery featuring the first globally solid-electrolyte transfer technology, including electrolyte membrane transfer and gradient thermal pressing, which reduces the probability of thermal runaway by 25 percent. This medium-nickel battery, with 245 Wh/kg energy density, is scheduled for mass production in October 2026 for mid- to high-end passenger EVs. Svolt Energy also developed a second-generation high-nickel semi-solid-state battery for low-altitude electric aircraft, achieving 342 Wh/kg energy density and tested in eVTOL installations.
Svolt Energy also announced its Stacked 4.0 battery technology, which succeeds the 3.0 version. The stacked 4.0 uses a “16-sheet simultaneous stack” design, double the 8-sheet configuration of the previous generation, and achieves a 100 percent efficiency improvement. Svolt Energy said the design supports larger stacked battery sizes, allows single-line production exceeding 1 GWh, and reduces per-Wh costs by 34 percent. According to the company, 2D and 3D designs were completed by the end of 2025, with volume production planned for the second quarter of 2026.
Svolt Energy Technology Co., Ltd. was established in 2018 following a spin-off from Great Wall Motor and focuses on lithium-ion battery cells, modules, battery packs, and energy storage systems.
The company stated that the third-quarter 2026 rollout reflects readiness for production integration following validation testing.
Updated: 13/01/2026 20:25
