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Восстановление аккумулятора

Efficient use

Effective charge device SWEL-ECD: recent tests

In the “SWEL energy” electrochemical laboratory has designed an effective accumulator charging device (“SWEL-ECD”) which is under testing now. SWEL-ECD realizes the algorithm of decreasing the polarization component of internal resistance of a chemical current source (CCS). The use of SWEL-ECD provides the following advantages:

  • possibility to charge accumulators with aqueous electrolyte up to full capacity without gassing;
  • to increase operating surface of accumulator active mass during charge, and thereby reduce discharge current density and increase the energy extracted during discharge.

The following results were obtained during testing of lead-acid accumulators with capacity 17Ah and 33Ah:

  • during 10 hour-charge up to voltage 13.4V (which almost completely eliminates gassing) and the following discharge by constant current in 2h, 4h and 20h modes the extracted capacity was 122.7%, 123% and 106% respectively of the capacity indicated in accumulator ratings;
  • at fast charge during 4 hours up to voltage 13.6V and the following discharge by direct current in a 4 hour-mode it is possible to completely extract from the accumulator the capacity transmitted during its charge;
  • the accumulator is charged in ultra-fast 1 hour-mode; during the following 2 hour discharge of the accumulator by direct current 0.35C it is possible to extract the capacity indicated by the manufacturer for a 10-13h charge mode.

The prototype model of the device has the following characteristics: charging voltage 9-16V, maximum charging current 20A, power consumption < 3W, efficiency 90-98% (according to charging power).

ECD was tested by charge and the following discharge of lead-acid accumulators Haze HZB12-33 (12V, 33Аh) and CSB GP12170 (12V, 17Аh).

A stabilized supply of current and voltage Mastech HY3030E (maximum output voltage 30V, maximum output current 30A) was used as power supply during charge of accumulators. The discharge of accumulators was executed on the electronic load “Aktakom ATH8301” (load power 0-350W, load current 0-30A). Voltage and current were controlled by a digital multimeter “Fluke 187” and a digital oscillograph “Tektronics TDS1012B.


Lead-acid batteries charging and discharging test results (diagrams with text comments):

Figure 1. Disharge of lead-acid accumulator Haze HZB12-33 by constant current 11.45A down to terminal voltage 9.9V (corresponds to a 2-hour discharge mode introduced in accumulator ratings)

Figure 2. Disharge of lead-acid accumulator Haze HZB12-33 by constant current 6.19A down to terminal voltage 10.2V (corresponds to a 4-hour discharge mode introduced in accumulator ratings)

Figure 3. Disharge of lead-acid accumulator Haze HZB12-33 in constant power mode of 76.5W down to terminal voltage 10.2V (corresponds to a 4-hour discharge mode introduced in accumulator ratings)

Figure 4. Disharge of lead-acid accumulator Haze HZB12-33 by constant current 1.66A down to terminal voltage 10.2V (corresponds to a 20-hour discharge mode introduced in accumulator ratings)

Figure 5. Fast charge of lead-acid accumulator Haze HZB12-33 by SWEL-ECD and its following discharge down to terminal voltage 10.2V (corresponds to a 4-hour discharge mode introduced in accumulator ratings)

Figure 6. Ultra-fast charge of a lead-acid accumulator CSB12170 by SWEL-ECD and its following discharge by the current 5.92A down to terminal voltage 9.9V (approximately corresponds to a 2-hour discharge mode introduced in accumulator ratings)

 

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