Wavecom improves the parameters of the Q24 series. Free Technical Library News

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Wavecom improves the parameters of the Q24 series

23.01.2008

As part of its product enhancement program, Wavecom is making minor changes to the Q24 series module circuitry.

Modification of the hardware will change the following parameters: 1. Reduction of the minimum battery charge current limit. 2. Optimization of the module's internal reset procedure. 3. Improving the operation of the radio frequency part, especially at extreme temperatures.

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Sodium-ion batteries CATL 10.08.2021

Contemporary Amperex Technology (CATL) has unveiled its first-generation sodium-ion battery, as well as its AB battery pack, capable of combining sodium-ion and lithium-ion cells in a single module.

The principle of operation of a sodium-ion battery is similar to that of a lithium-ion battery. Sodium ions also move between the cathode and anode. However, compared to lithium ions, sodium ions have a larger volume and higher requirements regarding the structural stability and kinetic properties of materials. This has become a deterrent to the development of industrial production of sodium-ion batteries.

CATL's innovation was the use of "Prussian white" (Everite salt) material with a higher specific capacitance for the manufacture of the cathode. In addition, the company upgraded the bulk structure of this material by redistributing electrons, which made it possible to solve the problem of a rapid decrease in capacitance during cyclic operation of the material. For the anode, CATL has used a hard carbon material that has a unique porous structure that provides redundant storage capacity and rapid movement of sodium ions, as well as excellent cycling performance.

The first generation of CATL sodium-ion battery, based on a series of new developments in the chemical system, has the advantages of high energy density, fast charging capability, excellent temperature resistance, excellent low temperature performance, high integration efficiency, etc. CATL ion battery can reach 160 Wh/kg, and the battery can be charged in 15 minutes to 80% at room temperature. In addition, under low temperature conditions (-20°C), the sodium-ion battery has a capacity retention rate of over 90%, and its system integration efficiency can reach over 80%. The heat resistance of sodium-ion batteries exceeds national safety requirements for traction batteries. The first generation of sodium-ion batteries can be used in various vehicle electrification applications, especially in regions with ultra-low temperatures, where its advantages become apparent. In addition, it can be flexibly adapted to the application needs of all energy storage scenarios.

The development target for the next generation of sodium-ion batteries is an energy density greater than 200 Wh/kg.

CATL has developed a complete solution for the AB battery system, which consists of mixing and matching sodium-ion and lithium-ion batteries in a certain ratio and integrating them into one battery system, and managing different battery systems through high-precision BMS algorithm. The AB battery system can compensate for the current lack of energy density in the sodium-ion battery, as well as expand its advantages in terms of high power and performance at low temperatures. This groundbreaking structural system expands the applications of lithium-sodium battery systems.

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