Svolt explains the battery cell production – step by step

Svolt explains the battery cell production - step by step-svolt

Svolt Energy develops and manufactures as a global high-tech company and spin-off of the Chinese automobile manufacturer Great Wall Motors, lithium-ion batteries and battery systems for electric vehicles and energy storage systems. This is also a cobalt-free NMX battery cell. In the future, one can also be settled in Germany with its own production.

To answer a variety of questions that occur with the local settlement, the company starts an information campaign for battery cell production. An explanation shows the different production steps and represents them in a simple form. This we have integrated below before we go into detail on the individual manufacturing steps.

How to convey the video knows first to understand that batteries for electric cars, but also for smartphones from so-called electrodes (anode and cathode), a separator, which separates the electrodes from each other and the Ion-conductive electrolyte therebetween is. Step by step SVolt looks at the individual manufacturing steps in his clip. Started with the electrodes.

Here, in a first step different substances to paste for the minus (anode) and the positive pole (cathode) are mixed. These two pastes, which have a consistency like a pretty liquid, homogeneous dough, are a mixture of liquid (solvent) and solid fabrics (in powder form, such as flour). The cathode is additionally added to the active material – depending on the cell type Z. B. Lithium, manganese or cobalt.

In the next process step – the coating – the claim to the skills of the machines and employees increases. Because then it is important that the pastes are applied breaths to a carrier film made of copper or aluminum – from both sides. The resulting electrode foil is guided directly into the dryer so that the paste can be withdrawn the solvent and liable as a dry layer on the film. The solvent is collected and reused.

Subsequently, the then dried electrode foil runs through rotating rollers to increase the density of the coating and to correct fluctuations in the coating thickness. Thereafter, the rolled electrode foil is subdivided along several, smaller tapes. There is a dry process again before the slides are cut to the right level. Svolt shows that it is checked with sensors in each production step, whether all dimensions and properties are correct. All data is evaluated by an artificial intelligence so that the lowest deviations can be remedied directly.

Svolt explains the battery cell production - step by step-explainsSvolt Europe

The actual battery cell is created by the fact that the electrode foils now in a repeating cycle of anode, separator, cathode, separator, etc. be stacked or wound. The last step of electrode production is the electrical connection of cathode and anode. Only then are all components of the cell (electrode winding or stacks, housing, lid, seal, insulation and safety valve) are composed. The lid is then welded with the housing. In the next step, the electrolyte is injected into the cell.

Then it’s time and the finished cell will be loaded for the first time. This process lasts up to 24 hours. Subsequently, the cells are stored over several weeks to identify short circuits and check the cell properties. Thereafter, several battery cells can be assembled and connected to each other to form so-called battery modules. Installed electronics monitors the individual cells.

A variety of these battery modules in turn form the so-called battery system (high-voltage storage / battery pack), which is installed as a closed overall system into the vehicle. In the battery system, electronics regulate the charging and unloading operations of the modules (and thus the cells). In addition, about the capacity, the state of charge, the battery voltage or the temperature can be monitored. Cooling and heating ensures consistent performance and longevity of the cells.

Further information about Svolt and its plans for Europe and thus also Germany can be found in the podcast episode with Maxim Hantsch-Kramskoj vice President Sales & Marketing of Svolt Energy Technology Europe GmbH,.

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2 thoughts on “Svolt explains the battery cell production – step by step”

  1. Hello team,

    In the text above is a mistake. There is “… Paste for the minus (cathode) and the positive pole (anode) mixed …”.
    In the video you say it at 1:15 minutes exactly the other way around. (Anode = minus pole; Cathode = plus pole)


  2. As far as I know, in terms of Svolt and Saarland on site is still some ka … at the steam.
    We have relatives there near and provide us, about 200 km east east, with newspaper clippings &# 128521;


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