eWaste Silistra
Li-Ion Battery Recycling

Second life for end-of live-batteries





E-Waste Silistra EAD EAD (jsc.) holds a permit for annual treatment of used batteries from electric vehicles with a total capacity of 18 thousand tons. The activity takes place in the industrial zone of the town of Silistra.

E-Waste, in cooperation with academic partners as well as industrial integrators and companies for building and management of photovoltaic solar systems for industrial and domestic purposes, has set up a solution for electricity storage by re-configuring used lithium-ion battery modules from electric vehicles. The solution is tailor made to match the specific individual capacity needs of our clients.



Lithium-ion batteries are considered to be the energy depots of the future and an irreplaceable component for electric vehicles. The race for the automotive industry to create the most affordable electric vehicle has begun, resulting in a tremendous increase in the amount of built-in batteries.

Charging, discharging, and powering of the electric vehicles in the battery module results in degradation processes ("aging"). The rate at which the aging processes of the individual cells occur is different, as the main factors are temperature, charge rate, discharge rate, etc.

Upon reaching a maximum of 75% of the nominal capacity, the battery modules become unusable for this application (“end of life”), as virtually the electric car is unable to meet the expected mileage with one charge of the battery. This fact requires replacement of the main battery in electric vehicles with a new one. The replaced modules still have a high residual capacity, making them perfectly suited for other stationary-type applications. One of them is a system for storing electricity from renewable sources. Besides the clean storage function, the batteries help to compensate for the deficiencies in the energy mix and improve the reliability and stability of the network.


The process of transformation of used lithium batteries into stationary electrical energy storage systems comprises the following basic steps:


the battery systems (or modules) of the main components: lithium-ion cells, metal housing, metal bars that hold the individual cells; copper conductors in the form of cables and busbars; electronic components and boards to provide charge and discharge control at cell level.


each individual lithium-ion residual cell, if necessary, with (with an additional charging device supporting adequate charging curve technology and current and voltage levels) rescue / training cycles to increase capacity and improve the performance of the cell.


of several lithium-ion cells (with the same or very similar residual capacities (state of health) ) depending on the expected operating voltage and current of the module, followed by a BMS to manage the cell group (module).


a power storage system consisting of a metal housing (slots box) with rails to guide the individual elements in which the lithium-ion modules are connected and arranged, which are controlled by electronic circuits, charging controllers, inverters converting DC power into AC and interface to perform configuration and display of performance - user display.


Ludmil Grigorov

Managing director, having multiple years’ experience with regularity of recycling and reusage of batteries.

Plamen Angelov

Head of facility operation with 25+ years of experience management of production and construction processes.

Krum Zlatkov

Chief battery engineer, electrical engineer with experience in PV plus energy storage systems, lithium-ion battery test and BMS.

Decho Zhechev

Head of battery supply, with experience in electrical vehicles fleet management and knowledge of second-hand market for EV parts.

Kremena Petrova

Administrative expert, responsible for battery acceptance and reporting process.




14, Tzar Osvoboditel blvd., fl.3

1000 Sofia, Bulgaria


1 Feribotna str.

7500 Silistra, Bulgaria

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