EVE Energy Launches Solid-State and Sodium-Ion Batteries

EVE Energy Launches New Solid-State and Sodium-Ion Battery Solutions

EVE Energy has announced the launch of its Longquan No. 3 2.0 all-solid-state battery and a dedicated sodium-ion battery solution for electric two-wheelers. Alongside these announcements, three battery products rolled off the production line at the company's Chengdu facility: the Longquan No. 3 2.0, a polyoxy-based all-solid-state battery, and a solid-liquid hybrid battery. The developments demonstrate the company's continued work across different battery chemistries and solid-state technology approaches. The products target distinct applications, ranging from implantable brain-computer interface devices to electric two-wheelers, while the company's broader development activities also cover vehicles and consumer electronics.

Longquan No. 3 2.0 Targets Implantable Brain-Computer Interfaces

The Longquan No. 3 2.0 was designed for implantable brain-computer interface (BCI) applications. Its titanium-cased button cell measures 23 millimeters in diameter and 4 millimeters in thickness, with a reported volumetric energy density of 1,045 Wh/L. According to the supplied information, this figure is 40% higher than that of conventional liquid-electrolyte batteries. The compact dimensions and energy-density specification are central characteristics of the product's intended application. Its design also replaces a liquid electrolyte with a solid electrolyte, an approach intended to reduce the risks associated with electrolyte leakage and thermal runaway.

Solid Electrolyte Design and Battery Safety

Replacing a liquid electrolyte with a solid electrolyte is a defining feature of the Longquan No. 3 2.0. EVE Energy says the design reduces the risks of leakage and thermal runaway, two concerns associated with battery operation. The announced specifications identify the product as an all-solid-state battery intended for an implantable medical application rather than a general-purpose electric-vehicle battery. The stated energy density, cell dimensions, and electrolyte design describe the product's principal characteristics, but the supplied announcement does not provide further details about manufacturing scale, commercial availability, pricing, or deployment timelines for the BCI application.

Sodium-Ion Battery Solution for Electric Two-Wheelers

The company's dedicated sodium-ion battery solution for electric two-wheelers is reported to offer a cycle life of up to 10,000 cycles and a discharge operating temperature range from -40°C to 60°C. At -20°C, its discharge capacity retention exceeds 93%, indicating that the battery maintains most of its discharge capacity under the stated low-temperature condition. EVE Energy also reports that after the battery is fully discharged and stored for one year, its capacity recovery rate exceeds 98%. These figures describe the performance claims provided in the announcement; the source material does not specify the testing protocol, operating conditions for the cycle-life figure, or the precise definition used for capacity recovery.

Sodium-Ion Battery Passes Multiple Abuse Tests

The sodium-ion battery solution reportedly passed nail penetration, cutting, crushing, overcharging, and short-circuit tests without catching fire, exploding, or undergoing thermal runaway. These results address several forms of mechanical damage and electrical abuse that can be relevant when evaluating battery safety. The reported outcomes are specific to the tests described in the announcement and should not be interpreted as a guarantee that every possible failure condition has been eliminated. The supplied information does not identify the testing laboratory, detailed test parameters, certification framework, or whether the results have been independently verified. Those details would be needed to make direct comparisons with other battery products.

EVE Energy Pursues Multiple Solid-State Battery Technologies

EVE Energy is building on its Longquan battery series while developing several technology pathways in the solid-state battery field. These include polyoxy-based all-solid-state batteries, in-situ solidification, and solid-liquid hybrid batteries. The three products reported to have rolled off the production line at the Chengdu facility—the Longquan No. 3 2.0, the polyoxy-based all-solid-state battery, and the solid-liquid hybrid battery—illustrate the breadth of this work. The company is targeting applications across vehicles, consumer electronics, and implantable medical devices, indicating that its battery development strategy spans multiple end markets rather than a single vehicle category.

Product Applications Across Different Markets

The announced products address different requirements. The Longquan No. 3 2.0 focuses on a compact implantable BCI application and reports a volumetric energy density of 1,045 Wh/L, while the sodium-ion solution is designed for electric two-wheelers and emphasizes cycle life, temperature performance, capacity recovery, and results from several abuse tests. Meanwhile, the polyoxy-based all-solid-state and solid-liquid hybrid batteries represent additional technology pathways coming from the Chengdu facility. The source announcement does not provide detailed specifications for those two products, so their relative performance, readiness for commercialization, and suitability for particular vehicle or consumer-electronics applications cannot be established from the available information.

What the Announcement Establishes

The announcement establishes that EVE Energy has launched the Longquan No. 3 2.0 all-solid-state battery and a dedicated sodium-ion battery solution for electric two-wheelers, while three named products have rolled off its Chengdu production line. It also provides selected performance figures for the Longquan and sodium-ion products and identifies several solid-state technology approaches under development. However, it does not state production volumes, customer agreements, prices, delivery schedules, or the timing of broader commercial deployment. These distinctions matter when assessing the significance of a product launch: disclosed specifications and production-line milestones provide evidence of development activity, but they do not by themselves establish market adoption or large-scale commercial supply.

Industry Impact & Outlook

EVE Energy's announcements highlight how battery developers are pursuing different chemistries and cell designs for specialized applications, including implantable medical devices and electric two-wheelers. The reported energy density of the Longquan No. 3 2.0 and the sodium-ion solution's stated cycle life, low-temperature performance, and abuse-test results provide specific performance claims that prospective customers may evaluate against their application requirements. The company's parallel work on polyoxy-based, in-situ solidification, and solid-liquid hybrid technologies also reflects a multi-path development strategy. The next indicators of commercial significance will include fuller technical validation, product availability, customer adoption, and evidence of production scale, none of which is quantified in the supplied announcement.

Frequently Asked Questions

What batteries did EVE Energy announce?
EVE Energy announced the Longquan No. 3 2.0 all-solid-state battery and a dedicated sodium-ion battery solution designed for electric two-wheelers. The company also reported that three products rolled off the production line at its Chengdu facility: the Longquan No. 3 2.0, a polyoxy-based all-solid-state battery, and a solid-liquid hybrid battery. These announcements cover more than one battery technology and application. The supplied information does not provide commercial prices, production volumes, or delivery schedules for the products.

What is the energy density of the Longquan No. 3 2.0?
The Longquan No. 3 2.0 reports a volumetric energy density of 1,045 Wh/L in a titanium-cased button cell measuring 23 millimeters in diameter and 4 millimeters in thickness. EVE Energy states that this is 40% higher than the energy density of conventional liquid-electrolyte batteries. The product is designed for implantable brain-computer interface applications. The announcement does not provide additional test methodology or comparative product details, so the stated figure should be understood in the context of the company's reported specifications.

What application is the Longquan No. 3 2.0 designed for?
The Longquan No. 3 2.0 is designed for implantable brain-computer interface applications, which connect neural activity with external computing systems. Its compact titanium-cased button-cell format measures 23 millimeters in diameter and 4 millimeters in thickness. The product uses a solid electrolyte instead of a liquid electrolyte, with the stated aim of reducing leakage and thermal-runaway risks. The source announcement does not specify particular medical devices, customers, regulatory approvals, or a commercial deployment date for the battery.

What are the stated performance figures for EVE Energy's sodium-ion battery?
EVE Energy's dedicated sodium-ion battery solution for electric two-wheelers is reported to offer a cycle life of up to 10,000 cycles and a discharge temperature range of -40°C to 60°C. The company also reports discharge capacity retention above 93% at -20°C. After full discharge followed by one year of storage, the battery reportedly achieves a capacity recovery rate above 98%. The announcement does not provide the detailed test protocols or conditions needed to independently assess or compare these figures with competing products.

Which safety tests did the sodium-ion battery pass?
The sodium-ion battery solution reportedly passed nail penetration, cutting, crushing, overcharging, and short-circuit tests without catching fire, exploding, or experiencing thermal runaway. These tests address several types of physical damage and electrical stress that can be relevant to battery safety evaluation. However, the announcement does not identify the testing organization, the detailed test conditions, or any certification standard used. The reported results therefore describe the outcomes claimed for the listed tests and should not be taken as proof that the battery is immune to every possible failure scenario.

Which solid-state battery technologies is EVE Energy developing?
EVE Energy is pursuing multiple approaches in the solid-state battery field, including its Longquan series, polyoxy-based all-solid-state batteries, in-situ solidification, and solid-liquid hybrid batteries. The company says these technologies target applications in vehicles, consumer electronics, and implantable medical devices. Three products—the Longquan No. 3 2.0, a polyoxy-based all-solid-state battery, and a solid-liquid hybrid battery—were reported to have rolled off the production line at its Chengdu facility. The source does not provide detailed specifications or commercialization timelines for every technology pathway.