The Anonymous Widower

Decommissioned Audi EV Batteries Used In 4.5MWh Stationary Energy Storage System In Germany

The title of this post, is the same as that of this article on Energy Storage News.

These are the first two paragraphs of the article.

Used lithium-ion batteries taken from carmaker Audi’s electric vehicles (EVs) have been repurposed into a ‘second-life’ stationary energy storage system by energy company RWE at a project in Herdecke, Germany.

RWE has deployed the system, which has a capacity of around 4.5MWh, at the site of its pumped hydro energy storage (PHES) plant at Hengsteysee reservoir in the North-Rhine Westphalia region of north-west Germany.

The Hengsteysee looks to be a well-designed reservoir, as it provides four functions.

  • Functions as the lower reservoir of the Koepchenwerk pumped-storage plant
  • Performs biological purification of water from the Lenne
  • Deposit of sediment from the Lenne
  • Venue for water sports and tourism

This Google Map shows the Hengsteysee.

More details of the Koepchenwerk pumped-storage plant is given on this page on Power Technology.

  • It has a generating capacity of 153 MW.
  • The gross head is 145.5 metres.
  • The storage capacity is around 0.6 GWh.

It is not the largest of pumped-storage plants, but Germany seems to have a lot of smaller ones like this and in total they have more than we do.

January 5, 2022 Posted by | Energy Storage, Transport/Travel | 2 Comments

Transformer Deliveries Mark Major Milestone For Braybrooke Substation Project And The Midland Main Line Upgrade

The title of this post, is the same as that of this press release from National Grid.

The press release says this.

Since early 2021 National Grid Electricity Transmission (NGET) has been building a new electricity substation near Braybrooke, on the outskirts of Market Harborough in Leicestershire.

The new substation, once complete, will form a vital part of electrical infrastructure to support Network Rail’s electrification of the Midland Main Line.

Following months of hard work, the project has reached a major milestone, as the engineering team have taken delivery of two new transformers.

The transformers arrived during November and were delivered via an access road off Kettering Road built to ensure construction traffic avoids the areas of Market Harborough and Braybrooke. Weighing an impressive 100 tonnes, they will now be installed at the substation over the coming months.

This Google Map shows the access road.


The main A6 road running across the top of the map.

Kettering road leads off it into Market Harborough.

The Midland Main Line running across the bottom of the map.

The access track runs between the two.

This enlargement of the South East corner of the map shows the 400 kV overhead transmission line.

Note that the shadows give away two 400 kV pylons.

Will the sub-station be built in the smaller rectangular field?

How Many Sub-Stations Will Be Needed For The Midland Main Line Electrification?

I seem to remember that the Great Western Main Line to Cardiff was electrified with just three sub-stations, London, Cardiff and one in the middle and the London one is shared with Crossrail.

So I suspect that the feed of electricity may only need one further substation at the Northern end.


It does seem that National Grid have planned this well.

I suspect, bringing in the transformers didn’t cause too much disruption and the route gives good access to the overhead line.

January 5, 2022 Posted by | Transport/Travel | , , , , | 2 Comments