Abrégé

A triple-active bridge (TAB) converter and methods to optimize the same is disclosed. The TAB converter includes a high-frequency three-winding transformer and three active full bridges, each coupled to the high-frequency transformer through a different passive network. The converter also includes a centralized controller providing gating pulses to semiconductor switches within the active full bridges, a power pulsating buffer (PPB) configured to reduce capacitor requirements on the DC port, and an unfolder stage to convert rectified AC voltage to a pure sine wave. The centralized controller may optimize performance by varying at least one of a switching frequency, a duty cycle of bridge voltages, and a phase shift between bridge voltages. The PPB may include a buck active power decoupler with a half-bridge, inductor, and capacitors, and also a primary full bridge and a power transfer impedance block.

Classes IPC  ?

• H02M 3/22 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif
• H02M 1/15 - Dispositions de réduction des ondulations d'une entrée ou d'une sortie en courant continu utilisant des éléments actifs
• H02M 3/34 - Transformation d'une puissance d'entrée en courant continu en une puissance de sortie en courant continu avec transformation intermédiaire en courant alternatif par convertisseurs dynamiques

Abrégé

A method for processing used lithium-ion batteries includes disassembling a used lithium-ion battery configured for a high-load application, inspecting cells of the used lithium-ion battery, charging the cells, and assessing a state-of-health of each of the cells by running a discharge test to determine an internal resistance and a capacity, comparing the internal resistance and the capacity with manufacturer specifications, and determining the state-of-health based on the comparison. The method also includes categorizing each of the cells into a reuse category, a repurpose category, or a recycle category based on the state-of-health of the cells and reusing the cells categorized in the reuse category in a battery configured for a high-load application, repurposing the cells categorized in the repurpose category into a battery configured for a low-load application, and recycling the cells categorized in the recycle category.

Classes IPC  ?

• H01M 10/48 - Accumulateurs combinés à des dispositions pour mesurer, tester ou indiquer l'état des éléments, p. ex. le niveau ou la densité de l'électrolyte
• H01M 10/44 - Méthodes pour charger ou décharger
• G01R 31/392 - Détermination du vieillissement ou de la dégradation de la batterie, p. ex. état de santé
• H01M 10/0525 - Batteries du type "rocking chair" ou "fauteuil à bascule", p. ex. batteries à insertion ou intercalation de lithium dans les deux électrodesBatteries à l'ion lithium