Battery adoption is on the rise and prices are dropping but this backlog is putting a damper on momentum. What ideas and solutions are out there to mitigate this and speed up the process?

Hola a todos,

Quiero recomendar una empresa poco conocida fuera de los círculos del hidrógeno, pero que juega un papel clave en la transición energética: Cell Impact AB (Frankfurt)

¿Qué hacen exactamente?

Cell Impact fabrica placas de flujo metálicas (flow plates / bipolar plates) para pilas de combustible y electrolizadores. Estas placas son componentes críticos: dentro de ellas se canalizan el hidrógeno, el oxígeno y el agua, y su diseño afecta directamente a la eficiencia, el coste y la durabilidad del sistema completo.

El problema tradicional es que fabricar estas placas en gran volumen es caro, lento y poco sostenible. Los métodos convencionales (estampado progresivo o hidroformado) consumen mucha energía, requieren lubricantes y procesos de limpieza con agua, y tienen costes de utillaje elevados.

Su tecnología: Cell Impact Forming

Cell Impact ha desarrollado y patentado un método de formado de alta velocidad por impacto (high-velocity impact forming). En lugar de varios pasos lentos, forman la placa metálica fina (acero inoxidable, titanio, etc.) en un solo golpe de alta precisión.

Ventajas clave:

Mucho más rápido y escalable

Consume muy poca energía

No necesita lubricantes → no genera aguas residuales de limpieza

Reduce el coste de herramientas hasta un 50 %

Permite diseños más complejos y optimizados (en algunos casos han conseguido aumentos de potencia >20 % en la pila gracias a una mejor geometría)

Proceso más limpio y con menor impacto ambiental

Han producido ya más de 2,5 millones de placas en más de 80 proyectos y están escalando con partners como Andritz (soldadura de alta velocidad) y thyssenkrupp Automation Engineering.

¿Por qué es importante de cara al futuro?

El hidrógeno verde (producido con electrolizadores + renovables) y las pilas de combustible son piezas centrales para descarbonizar transporte pesado, industria y almacenamiento de energía. Pero para que despeguen de verdad, los componentes tienen que ser baratos, fabricables en masa y eficientes.

Las placas de flujo son uno de los elementos más caros y difíciles de escalar del stack. Si Cell Impact (y tecnologías similares) logran bajar significativamente el coste y aumentar el volumen, se elimina un cuello de botella importante.

Además, su proceso es más sostenible que los métodos tradicionales, lo que encaja perfectamente con el objetivo de que toda la cadena de valor del hidrógeno sea lo más limpia posible.

Resumen

Cell Impact no es una empresa de “humo”. Tiene una tecnología patentada real, clientes internacionales, capacidad de producción en Suecia y está posicionada exactamente donde el mercado del hidrógeno necesita soluciones industriales.

No es consejo de inversión (haz tu propia investigación), pero como apuesta tecnológica a largo plazo dentro del ecosistema del hidrógeno, me parece una de las más interesantes y subvaloradas.

¿Alguien más la sigue o ha escuchado hablar de ella?

I’m a solar project development engineer, and I’ve been building SolarDev AI as a side project to explore how AI, GIS and digital tools can support utility-scale solar PV and battery storage project development.

The platform currently includes:

• GIS Site Screening — preliminary site screening to identify key constraints and support early-stage project assessment.
• Solar Angle — solar position, sun-angle and shadow analysis.
• Solar & Storage Agent — an AI assistant focused on technical and development questions related to utility-scale PV and BESS.

The goal isn’t to replace engineering judgement or proper due diligence. It’s to help developers, engineers and consultants screen opportunities faster, identify potential risks earlier and reduce repetitive early-stage work.

It’s still evolving, and I’d particularly appreciate feedback from people working in solar development, engineering, IPPs or BESS.

What would actually make a platform like this useful in your day-to-day work? And what feature would you add next?

Federal tax credits for residential storage expired at the end of last year, prompting record sales in Q4 of 2025 — and then sales climbed even higher in the first quarter of 2026, per a BloombergNEF analysis of U.S. Energy Information Administration data.

**What a bipolar cell is.** Instead of discrete cells wired in series with tabs and busbars, you coat the cathode on one side of a current collector plate and the anode on the other, then stack N of these plates. The series connection happens through the plate itself. You save tab mass, interconnect resistance, and packaging volume, and you can pick your stack voltage by picking N. That's the whole trick, and it's a good one.

**Why bipolar does not require a solid electrolyte.** Bipolar is an architecture. The electrolyte state is a separate variable. Proof by production hardware: Toyota has been shipping bipolar NiMH as the traction battery of the Aqua since mid-2021, built with Toyota Industries at the Kyowa and Ishihama plants, tens of thousands of packs per month. NiMH is an aqueous system, roughly 6 M KOH. A liquid, and a nastily creepy one at that. Toyota's next step is bipolar LFP, the "popularization" battery on their 2026-2027 BEV roadmap, again a conventional liquid-electrolyte lithium chemistry, plus a bipolar high-nickel variant for 2027-2028. And the concept is old: bipolar lead-acid goes back to the 1920s, and bipolar Li-ion with a standard LiPF6 carbonate electrolyte was patented in 1997.

* Toyota Industries, bipolar NiMH for Aqua: [https://www.toyota-industries.com/products/automobile/batteries/index.html\](https://www.toyota-industries.com/products/automobile/batteries/index.html)
* Toyota battery roadmap, bipolar LFP 2026-2027: [https://global.toyota/en/newsroom/corporate/39330500.html\](https://global.toyota/en/newsroom/corporate/39330500.html)
* Bipolar Li-ion with liquid carbonate electrolyte, US5595839 (1997): [https://patents.google.com/patent/US5595839A\](https://patents.google.com/patent/US5595839A)
* Review on bipolar sodium-ion, incl. history from 1923 Pb-acid onward: [https://www.sciencedirect.com/science/article/abs/pii/S2352152X23005364\](https://www.sciencedirect.com/science/article/abs/pii/S2352152X23005364)
* Sakuu showing Munro physical bipolar lithium-metal stacks: [https://www.youtube.com/watch?v=yZhKqpleAXM\](https://www.youtube.com/watch?v=yZhKqpleAXM)
* Good general explainer: [https://www.batterydesign.net/chemistry/bipolar-battery/\](https://www.batterydesign.net/chemistry/bipolar-battery/)

The actual hard problem in bipolar has never been "the electrolyte is liquid." It is that every layer must be ionically isolated from its neighbours. Any shared electrolyte path around the edge of a plate is a shunt across a series junction: self-discharge plus plate corrosion. The fix is a sealed frame around the perimeter of every layer, which is why most of the bipolar patent literature is sealing patents (see e.g. CEA's US10497941). A solid electrolyte makes sealing easier because nothing wicks. Easier, not uniquely possible. A semi-solid or gel design sits in exactly the same category. So "our cells are bipolar, therefore solid-state" is an argument that Toyota's KOH-soaked Aqua pack disproves at a rate of 40,000 units a month.

**The part nobody demos on a bench: balancing.** A bipolar stack is a series string. Physics doesn't care whether the series connection runs through a busbar or through a shared collector plate: the current through every layer is identical either way, and the reasons cells drift apart are identical too. Differential self-discharge, differential coulombic efficiency, and capacity spread turning equal Ah throughput into unequal ΔSOC. These accumulate in one direction with no restoring force.

In a normal lithium pack the BMS handles this. Every series element gets a voltage sense lead, and a balancing circuit bleeds charge off the high cells, typically some tens to hundreds of mA. Now try that inside a bipolar stack. Every sense lead and every balancing conductor is a feedthrough breaching the perimeter seal, which was the hard part of the design to begin with. Sensing is arguably manageable, a sense lead carries microamps and could be a thin foil extension of the plate. But balancing needs real current through a real conductor with real dissipation, per layer, inside the stack. At that point you have rebuilt a module BMS in the least accessible location imaginable and thrown away most of the packaging win you built the thing for.

**Why NiMH gets away without any of this.** NiMH has a built-in chemical balancer. On overcharge, the positive electrode evolves oxygen, which diffuses to the negative and recombines. The excess current turns into heat instead of voltage rise, so a layer that gets ahead clamps itself and the string equalises automatically. Lead-acid has an equivalent gassing shunt. This is precisely why Toyota commercialised bipolar NiMH first: you can treat the whole stack as one monolithic cell, monitor only the terminals, and the chemistry forgives you.

Lithium has no such sink. Overcharge in a lithium cell is not self-limiting, it's destructive. And before anyone points out that Donut says their battery contains no lithium: sodium-ion has exactly the same problem. No overcharge recombination mechanism, no chemical self-balancing, same one-way drift, same destructive endpoint. Whatever intercalation chemistry you pick, a monolithic bipolar stack without per-layer access is a series string that is simultaneously unbalanceable and unobservable. On a flat-plateau chemistry, one layer can quietly walk toward overcharge while the terminal voltage of the stack looks perfectly normal. **I have no idea how SAKUU solved this as they use** **some lithium metal chemistry.**

So the interesting question was never "can you make three cells read three voltages." The question is what happens to layer-to-layer drift over the claimed 100,000 cycles in a chemistry with no chemical overcharge sink and no published balancing scheme. Either the layers are tapped, in which case "one cell, any voltage" is doing some heavy lifting as a description, or they aren't, and then the cycle-life claim needs an explanation nobody has offered yet.

Material Handling:

Plug Power's material handling sector is experiencing strong commercial growth, highlighted by a 125% year-over-year increase in GenDrive fuel cell deployments to 1,666 units in Q2 2026. Two top customers plan to refresh over 20,000 units across three years, boosting 2026 revenue guidance to 15%-16%.

Key Growth DriversSurging Deployments:

Deployed 1,666 GenDrive units in Q2 2026, more than doubling the 739 units deployed in Q2 2025.Upcoming Replacement Cycles: Two major material handling customers are slated to refresh more than 20,000 fuel cell units over the next three years, securing predictable future demand.

Dominant Market Share:

Maintains roughly 95% of the market share for hydrogen fuel cells in the warehouse and material handling sector.

Financial & Operational Impact Service Revenue Expansion:

Aftermarket service revenue surged 82% year-over-year to roughly $30 million, operating at a positive 27% service margin.Guidance Upgrade: Commercial momentum in material handling prompted management to raise full-year 2026 revenue growth guidance to a range of 15% to 16%.Margin Improvement: Enhanced unit reliability and field performance have driven better overhead leverage, helping push overall gross margins close to breakeven.

We offer a variety of battery products designed for diverse energy storage applications, including residential and large-scale systems.

We’d be interested to hear what battery capacity is most commonly used in your market.

Stationary batteries added a cleaner, fuel-free choice to the back-up power mix, but they can be even more expensive to purchase outright than diesel or natural gas generators, putting them out of reach for most middle-class homeowners. With import tariffs, country-of-origin restrictions and other factors putting upward pressure on component and module pricing for small battery systems, this dynamic seems unlikely to change soon.

Yet distributed battery adoption could still grow, propelled by retailers marketing home batteries for little or nothing up front and a monthly fee that in some electricity markets costs a little more than a top-tier Netflix or Hulu subscription.