lemonergy/ data

02 / Lemonergy Data

Battery data.
With the details.

Find the specification. Check its conditions. Follow the source. Put two cells on the same mission and see which one holds. Bring the same records into your own engineering tools.

Search the live catalog See the plans

No account, no key, no card. The demo queries the same API your tools would.

—battery products
—recorded observations
—manufacturers covered

Live from the API
Catalog

The real thing, right here

Search the catalog.

This searches the live API. Open a record to read its specifications with their conditions, or inspect the exact JSON your code would receive.

Live demo · no sign-in, no key

Loading the catalog…

The demo returns a few matches per request; a key returns them all

Source-linked specifications

Choose a record

Live records. Original units. Missing conditions stay visible instead of being filled in.Every value keeps the manufacturer document it was read from

Same job, side by side

Compare cells on your mission.

Pick up to three records from the search above. The API builds each one into the equivalent pack for the same job, runs the same mission through all of them, and says what the datasheets did and did not state.

One demo request per cell compared

Nothing selected yet. Use Compare beside a search result.

Select two or three cells to begin.

Each cell is built as the equivalent pack for the same job, then run through the identical mission, ambient and cooling.Every simulator input names its basis: stated, your assumption, or class-typical
01

Keep the conditions.

A capacity at 0.2 C is different from one at 1 C. Values travel with their units, conditions and statistic.

02

Trace the evidence.

Follow the source document and its page or section reference. Inspect the record behind a result.

03

Build on a clear version.

API responses identify the source revision. Keep a reference you can return to as the library grows.

Start where you are. Move up when it earns it.

From the demo above to production.

The demo needs nothing. A free key removes the hourly cap. The paid plan is for code that runs every day.

Monthly plans · EUR
You are already here

Demo

€0/ no account

The panel above. Same catalog, same responses, nothing to sign.

  • 40 requests / hour
  • 5 results per request
  • Compare up to 3 cells on a mission
  • Complete records, with conditions and sources
  • Callable from your terminal too
Search the catalog

The cap is per hour and resets on the hour.

Build your integration

Free key

€0/ month

Enough to write the integration and prove it works.

  • 100 requests / month
  • 10 requests / minute
  • Every match, full pagination
  • Compare up to 8 cells, 10 passes of a mission
  • Private keys you create and revoke
Create a free key

Sign in, then Account → Data API.

For daily use
Run it in production

Data API

€9/ month

For tools that query battery specifications as part of the working day.

  • 10,000 requests / month
  • 60 requests / minute
  • Everything in the free key
  • The same keys keep working
  • Usage and key controls in your account
Request API access

No payment is taken on this page. Lemonergy records your access after payment; your keys stay the same.

One Lemonergy membership

With Design

Included

Already paying for Design? Your Data API access comes with it.

  • 10,000 requests / month
  • 60 requests / minute
  • The paid Data API allowance
  • No separate API subscription
  • Other Lemonergy areas included
Explore Lemonergy Design

Included with an active paid subscription.

Account allowances are shared across your keys and reset at 00:00 UTC on the first day of each month. Failed queries never use allowance. The demo is capped per caller per hour. Trial and complimentary Design access use the free key allowance.

Built for integration

A small, predictable API.

Search products. Retrieve the complete record. Keep the source context in your own application.

Try it with no key: https://design.lemonergy.com/api/data/demo/v1/batteries?q=21700, or a comparison: …/demo/v1/compare?products=cell/molicel/inr21700-p50b,cell/samsung-sdi/inr21700-50e&mission=evtol-hop. With a key the base URL is https://design.lemonergy.com/api/data/v1 and the key goes in the X-API-Key header, on your server. Create keys after signing in on Lemonergy Design: Account → Data API. Every response names the catalog release it came from, so you can tell when the data moved.

Inspect a live response
GET/api/data/v1/batteries

Search battery cells, modules, packs and systems. Also on the demo base URL.

GET/api/data/v1/products/{uid}

Full specifications, conditions and source evidence. Also on the demo base URL.

GET/api/data/v1/products

Filter the accepted catalog by model, manufacturer or measurement.

GET/api/data/v1/compare

Several cells side by side from their datasheets and, with mission=, the same mission run for each. One request per cell. Also on the demo base URL.

GET/api/data/v1/missions

The mission library: eVTOL hop, drone mission, WLTP cycle, ESS day and more.

GET/api/data/v1/manufacturers

Manufacturers and accepted product counts.

GET/api/data/v1/components

Electrical components as they enter the accepted library.

GET/api/data/v1/usage

Current usage and your remaining request allowance. Not counted against the month.

Something missing?

Tell us which cell you need.

The catalog grows from real engineering questions. Send the manufacturer and model, or the datasheet, and it joins the review queue with its conditions and sources intact.

Request a model