1AK-GROUP is a manufacturer of batteries for all types of transport: cars and trucks, loading equipment. In 2024, the assembly of industrial Li-Ion batteries produced under the ZUBR LI-ION brand was mastered.
The production of li-ion batteries is a knowledge-intensive direction. 1AK-GROUP has created a center of scientific and technical competencies, which solves the problems of methodological support for the implementation of emergency energy systems in industry, housing and communal services, agriculture, as well as issues of innovation in diagnostics and intelligent management of emergency energy systems.
Particular attention is paid to both designing batteries to meet individual customer requirements and ensuring high quality and reliability of batteries.
The high quality and reliability of ZUBR LI-ION batteries is achieved through a variety of control and verification activities at various stages of production — from the manufacture of cells to the shipment of finished batteries. Violations of tolerances and criteria are not allowed.
Quality control at the cell manufacturer:
1. Only original class A/A+ cells are used (the QR code on each cell allows you to track and check all information from the manufacturer, laser welding of threaded terminals at the factory ensures low contact resistance and reliable fixation)
Figure 1 — QR code and serial number of the cell, the terminal for the double threaded bus mount is laser welded
2. Control of parameters of each batch of cells before shipment (nominal voltage, internal resistance)
Figure 2 — Example of production data with actual values of internal resistance and voltage parameters for each cell from the batch
Quality control and verification activities at the assembly plant of ZUBR LI-ION batteries:
1. Sorting of cells within one batch — using cells from the same batch in each individual battery with the minimum possible spread of parameters
2. Double tightening of bolted connections using torque wrenches and applying control marks.
Figure 3 — Example of a bolted connection of tires with double control marks for broaching
3. Monitoring the correct connection of the BMS system to the cells, monitoring the parameters of the cells after assembly, active balancing (gross balance) with specialized devices
Figure 4 — Device for diagnosing cells and monitoring the correct assembly of the battery. Primary balancing of elements with currents up to 10A
4. Output monitoring of battery parameters in the form of 3-10 charge-discharge cycles at extreme operating conditions (hourly discharge, two-hour charge) with monitoring of actual capacity, temperature of components (using a thermal imager).
Figure 5 — Load discharge devices for testing batteries at extreme operating conditions
Figure 6 — Monitoring the temperature of battery components at extreme operating conditions using a thermal imager
For consultation, write to e-mail info@1ak-group. com