MyTechDailyNews General: NIO's Large-Cylindrical Cell Plan Shifts to EVE and Gotion as a Year-End Small Batch Approaches
For readers who follow everyday technology news rather than battery chemistry internals, the latest detail is simple: JiPian Lab reports that NIO has clarified its manufacturing path for self-designed large cylindrical cells, selecting EVE Energy and Gotion High-Tech as contract manufacturers. The immediate marker is a very small batch expected around year-end. That small-batch word is the key: the story is not about a finished commercial battery program, but about a high-cost, high-uncertainty engineering plan trying to cross from prototype to reproducible lines.
The short version for general tech readers
NIO began building a battery team in 2021. By 2022, William Li said the company had assembled more than 400 people and planned to introduce an 800V high-voltage platform battery pack in 2024, associated with 4680. In February 2023, NIO announced the first phase of a Hefei industrial base with planned capacity of 40GWh. Six months later, equipment procurement for that 40GWh line was paused because of funding pressure. At the end of 2023, NIO used NIO Day to reveal a self-developed 46105 large-cylindrical scheme for a 900V high-voltage platform, with cell energy density of 292Wh/kg, a 120kWh pack and 5C fast charging. The original plan attached this battery to ET9, but ET9 at launch used a CATL prismatic pack.
In September this year, Li said NIO had invested more than 2 billion yuan cumulatively in battery research, with the main self-development line focused on large-cylindrical long-life cells and a self-developed plus contract manufacturing model. The named partners are now EVE Energy and Gotion High-Tech. The report says EVE Energy is BMW's large-cylindrical supplier and has the most extensive mass-production experience in large cylindrical cells, while Gotion High-Tech, based in Hefei, is considered a closer fit.
Timeline at a glance
| Point | Development | Why it matters |
|---|---|---|
| 2021 | NIO formed a battery research team. | The large-cylindrical story started long before the year-end production signal. |
| 2022 | William Li described a battery team of more than 400 people and a planned 2024 800V battery pack tied to 4680. | It shows the plan was linked to high-voltage vehicle architecture from the start. |
| February 2023 | Construction began on the first phase of the Hefei industrial base, planned for 40GWh capacity. | At this point, NIO's path looked closer to in-house scale production. |
| Six months later | Equipment procurement for the 40GWh production line was shelved amid funding pressure. | The shift toward outsourcing became a financial and operational necessity. |
| End of 2023 | At NIO Day, the company revealed the 46105 large-cylindrical solution for 900V, 292Wh/kg, 120kWh and 5C. | The technical goal became public, not only a platform intention. |
| ET9 follow-up | The battery was originally planned for ET9, but the car later used a CATL prismatic pack. | General readers should see product plans and launch realities as separate things. |
| September this year | Li said cumulative battery research investment exceeded 2 billion yuan, with a self-developed plus contract manufacturing model. | The report's central business decision was already framed as partnership. |
| Year-end | Very small-batch cells from EVE Energy and Gotion High-Tech are expected to come offline. | A pilot-scale output is the next checkpoint, not full-scale mass supply. |
What this does not mean yet
The most useful way to read this update is as a supply-chain experiment. A year-end small batch can validate whether a design can be reproduced with partner manufacturing discipline, but it does not yet answer several larger questions: how many cells can be made at what cost, how quickly defects can be reduced, and whether a vehicle model will actually ship with those cells. The report also keeps the market context clear: large cylindrical remains a niche, and prismatic batteries are still the industry's absolute mainstream.
That mainstream status matters for general tech readers because it explains why a headline about a new cell format should not be mistaken for a near-term consumer switch. Outside Tesla and BMW, relatively few installed models use large cylindrical cells, so the path from engineering news to everyday product availability can be long and uneven. The NIO case is therefore a good example of how technology coverage works: design ambition, financing pressure, contract partnerships and production milestones are separate gates, not one single finish line.
Checklist: what to track in this kind of EV tech news
- Whether year-end really means small-batch cells, not full mass production.
- Which partner takes which role: EVE Energy's BMW-linked large-cylindrical experience versus Gotion High-Tech's Hefei base and manufacturing fit.
- How long the 46105, 900V, 292Wh/kg, 120kWh and 5C figures remain targets before they appear in verified vehicle data.
- Whether ET9's later use of a CATL prismatic pack becomes a repeated pattern for NIO's own cells.
- Whether large cylindrical adoption moves beyond the narrow group associated with Tesla and BMW while prismatic batteries retain mainstream scale.
Common misconceptions
| Common claim | What the report actually supports |
|---|---|
| Small batch equals commercial readiness. | Year-end output is described as extremely small, which is more like a validation step. |
| Self-design must mean self-production. | The stated mainline is self-developed plus contract manufacturing. |
| 4680 and 46105 are unrelated detours. | The timeline links them as evolving expressions of NIO's 800V or 900V high-voltage battery direction. |
| Prismatic packs are becoming obsolete. | The report says prismatic batteries are still the absolute mainstream. |
FAQ
Who is doing the production work?
EVE Energy and Gotion High-Tech are contract manufacturers. Their role is to produce cells that NIO designs, moving a self-developed large-cylindrical concept from engineering specifications toward line output.
Why is year-end important?
It is a small production checkpoint. It can show whether the design can be made consistently enough for later expansion, but it does not prove broad supply or ordinary-car availability.
Why not build everything in-house?
NIO's Hefei industrial base first phase was planned for 40GWh, but six months after the February 2023 start, equipment procurement for that line was shelved due to funding pressure. Contract manufacturing is the practical route described in the report.
Does this affect today's NIO buyers?
Not automatically. The original plan placed the 46105 battery in ET9, but the model launched with a CATL prismatic pack. The general-tech takeaway is that battery supply-chain changes can be announced long before they appear in ordinary cars.
Action advice: what general tech readers should do now
- Read the year-end milestone as a manufacturing test, not a product launch.
- Compare the stated 900V, 292Wh/kg, 120kWh and 5C figures with later verified vehicle data before assuming final performance.
- Watch whether other manufacturers follow the same pattern: define an advanced cell format, then rely on experienced contract partners to prove it can be built.
- Treat prismatic batteries as the current mainstream unless a report shows a new format has reached meaningful installed volume beyond Tesla and BMW.
- Use the ET9 and CATL example as a reminder that a company's announced battery plan and a vehicle's shipping battery choice can diverge.
The takeaway for everyday tech coverage
This update is less about a single company's factory and more about how ambitious consumer hardware plans are reshaped by cash flow, supplier capability and mainstream manufacturing inertia. NIO's large-cylindrical route shows a pattern that appears across technology news: a clear design target, a delayed production path, and a small external checkpoint that tells the public what comes next. The year-end small batch is not an endpoint. It is the first practical clue that a plan once described by JiPian Lab as moving through 2021, 2022 and 2023 has now reached the hard part: making cells on partner lines, at partner pace, while the prismatic market keeps its grip.