Charger for batteries up to 24 cells. Encyclopedia of radio electronics and electrical engineering
Encyclopedia of radio electronics and electrical engineering / Chargers, batteries, galvanic cells
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A charger circuit for charging batteries of the Ni-Cd & Ni-MH type is presented. The number of series-connected batteries up to 24 units. Charge current up to 2 amperes. The circuit provides a limit on the maximum current and charge voltage.
(click to enlarge)
The value of the maximum voltage, depending on the type of battery and the number of cells, is selected empirically. Additional temperature protection is also provided. A 4 kOhm thermal resistance is connected between the minus and the second contact Con10.
Given the rather large amount of heat released by some current-carrying elements, it is necessary to think carefully about the issue of heat transfer if you plan to use the device at currents greater than 1 ampere.
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The scientists behind the BACON (Boulder Atomic Clock Optical Network) project are building a global network of interconnected atomic clocks, recently tested a new laser system that has achieved the highest stability record to date. Through the use of a number of innovations and engineering solutions, the beam of this laser system was able to maintain its stability, covering a distance of 2,4 kilometers in the open air. The wavelength, phase, and amplitude stability of this laser system is at least 100 times greater than similar systems built before, and 1000 times greater than the stability of the atomic clock itself, which will be connected and synchronized using such laser communication.
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