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Batteries and accumulators

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Chemical current sources (CHS) have become part of our lives for many years. In everyday life, the consumer rarely pays attention to the differences in the used HIT. For him, these are batteries and accumulators. They are commonly used in devices such as flashlights, toys, radios or cars.

Most often, batteries and accumulators are distinguished by their appearance. But there are batteries that are structurally made in the same way as batteries. For example, the appearance of the KNG-1D battery differs little from the classic R6C finger batteries. And vice versa. Accumulators and batteries of a disk design are also indistinguishable externally. For example, a D-0,55 battery and a mercury button cell (battery) RTs-82. In order to distinguish between them, the consumer needs to pay attention to the markings applied to the HIT case. This is necessary to select the correct power supply for your device.

The advent of portable audio, video and other more energy-intensive equipment required an increase in the power consumption of HIT, their reliability and durability. This book describes the specifications and how to select the optimal HIT, how to charge, restore, operate and extend the life of batteries and batteries.

The reader should pay attention to the warnings regarding the safety and disposal of HIT. In the case when the power consumption is relatively large (10Ah), batteries are used, mainly acid, as well as nickel-iron and nickel-cadmium. They are used in portable computers (Laptop, Notebook, Palmtop), wearable communications, emergency lighting, etc. Car batteries occupy a special place in the book.

New sealed accumulators, created using the "dryfit" technology, which do not require maintenance for 5...8 years of operation, are described. They do not have a harmful effect on people and equipment. In recent years, such batteries have been widely used in backup power supplies for computers and electromechanical systems that store energy for possible peak loads and emergency power supply of vital systems.

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Random news from the Archive

MAX20343/MAX20344 converters 15.07.2021

Maxim Integrated has mastered the production of the new MAX20343/MAX20344 switching voltage regulators for use in compact, portable battery-powered devices. The MAX20343/MAX20344 is a fully integrated solution that combines a controller and power transistors in a single package that can drive loads up to 1A at 3,5V output.

The power section of the MAX20343/MAX20344 microcircuits is built on a non-inverting buck-boost circuit, which allows them to be used with primary energy sources, the voltage of which can be either higher or lower than the required output voltage. At the same time, special attention was paid to the functioning of the microcircuit in cases where the input voltage is approximately equal to the output: thanks to the unique transistor switching algorithm in these modes, it was possible to avoid sudden voltage fluctuations on the load and reduce the level of electromagnetic interference.

The key benefits of the MAX20343/MAX20344 are high efficiency (provided by flexible power section configuration and adaptive power switching algorithm), ultra-low internal current consumption, starting at 3,5 µA in operation and decreasing to 0,3 µA in standby mode, small levels of output voltage ripple and electromagnetic interference. The combination of these advantages makes the MAX20343/MAX20344 ideal for medical applications, such as portable photoplethysmographs, whose measurement accuracy is directly dependent on the levels of ripple and noise in the power supply circuits of the optical measurement system.

The high speed of response to transient processes, including sharp fluctuations in the input voltage, allows these microcircuits to be used to power devices with a sharply changing load, for example, wireless sensors of intelligent automated systems using LPWAN networks. In such applications, low power density primary power supplies are often used in conjunction with supercapacitors. In this case, the ability to work at an input voltage of 1,9 V allows you to maximize the installed power of the supercapacitor and increase the battery life.

Another area of ​​application for the MAX20343/MAX20344 chips are the Truly Wireless Stereo Bluetooth headphones. With a large voltage difference between the batteries of the case and the headphones, the latter, due to a decrease in the efficiency of the integrated chargers, begin to warm up, which can cause some discomfort when using them and leads to waste of a limited amount of battery power in the case. In this case, the use of MAX20343/MAX20344 chips will reduce the voltage supplied to the headphone chargers, which will lead to less heating of their cases and more rational use of the battery power of the case.

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