Novel technology for production of lead-acid batteries by application of LEIT

10th LABAT Conference, June 2017 Golden Sands, Bulgaria Boris Shirov, Project Manager R&D, TASC Ltd. Bulgaria Prof. Vesselin Naydenov, IEES, Bulgarian Academy of Sciences

THE IMPORTANCE OF THE NEW IDEAS AND THEIR PERCEPTION

Science has no shortcuts

THE LEAD-ACID BATTERY

The lead-acid battery still has its secrets

THE LEAD-ACID BATTERY

The lead-acid battery of today The lead-acid battery of tomorrow

WHO WE ARE

• TASC Ltd is a Bulgarian R&D Company established in 2005 focused on application of low energy modulated magnetic fields on various technologies including lead-acid batteries

• First patent application in 1997 • ISO 9001:2015 Quality Management

Systems, certified by NQA • R&D Lab opened in Pravets, Bulgaria

October 2010 • Low Energy Impact Technology (LEIT)

patents pending WO2014032128, WO2014078915

NO PRODUCTION OR EXPLOITATION TECHNOLOGY CHANGES REQUIRED

LEIT consists only of adding a procedure and a device without changing the type and amount of the input materials, production facilities and the parameters of the technological processes.

LEIT device developed for paste mixer

• External influence with Modulated Magnetic Field • Influencing the electrochemical and crystallization

processes • Programmable influence for each process in lead-acid

batteries

LEIT Prototype installed during formation

LOW ENERGY IMPACT TECHNOLOGY - LEIT

Advantages of Low Energy Impact Technology (LEIT)

• Up to 20% higher discharge capacity • Significantly reduced charging time • Longer battery life • Improved structure and composition

of the positive active mass and negative active mass

• Increased curing efficiency • Improved customization of batteries • Better control over formation of

active masses • Fast and complete recovery of

batteries after long stay at discharged state

• No changes required in production technology and operation control

• Can be applied during production and operation

• LEIT combined with BMS significantly improves the parameters of the batteries

• Cell equalizing in large strings

• Improved performance at sub-zero temperatures

LEIT APPLIED DURING THE PRODUCTION OF LEAD-ACID BATTERIES 20% HIGHER DISCHARGE CAPACITY

Formation with LEIT of 2V/4.5Ah cell gives 20% higher discharge capacity when cycled under C10 and C20.

Discharge capacity for 2V/4.5Ah cells with and without LEIT.

2V/4.5Ah lead-acid cells • C10 test for the first 10 cycles • C20 test afterwards until reaching 70% of Cn

State of life for 2V/4.5Ah cells with and without application of LEIT treatment

LONGER BATTERY LIFE

IMPROVED POSITIVE ACTIVE MATERIAL (PAM) & NEGATIVE ACTIVE MATERIAL (NAM)

More robust formation of Positive Active Material (PAM)

More robust formation of Negative Active Material (NAM)

LEIT BETTER ACTIVE MASS COMOSITION XRD diagrams and chemical analysis of the active masses of Control cell (A) and cell with applied LEIT during formation(B)

Sample % Pb % PbSO4 %PbO

NAM of the LEIT cell 92.25 3.51 2.89

NAM of the control cell 94.60 3.91 1.79

Sample % PbSO4 % PbO % PbO2

PAM of the LEIT cell 6.50 7.07 85.44

PAM of the control cell 4.13 2.45 92.73

Chemical composition PAM

Chemical composition NAM

PERFORMANCE @ -15⁰ C OF AGM CELLS FORMED WITH APPLICATION LEIT

C10 cycling @ -15⁰ C

• After the 3rd C10 cycle the control cell did not recharged to 105% of the previously discharged capacity • LEIT Cell completed 10 C10 cycles for 220:50 h

LEIT & BMS DURING OPERATION

Special LEIT device with integrated BMS was developed for impact on the electrochemical processes that occur during the operation of batteries or cells. The device can be applied to any size SLI, UPS, stationary, traction etc. battery or cell regardless of the design and the manufacturer. Impact on one or string of batteries and cells.

LEIT & BMS installed on UPS battery

• Longer cycle-life

• Higher charge acceptance

• Better energy efficiency leading to higher discharge capacity

• Up to 20% less sulfation during HRPSoC

CONCLUSIONS

The lead-acid battery has a great future Application of LEIT during production of lead-acid batteries improves their

characteristics by creating conditions for accelerated and more effective electrochemical and crystallization processes

Application of LEIT reduces the sulfation of NAM up to 20 % Fast, easy and efficient integration with the existing production and operational facilities Application of LEIT during production and/or operation of batteries improves charge

acceptance and service life at sub-zero temperatures The combination of LEIT and BMS significantly improves cycle life and charge acceptance