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476results about How to "Lower on-resistance" patented technology

Power semiconductor devices and methods of manufacture

Various embodiments for improved power devices as well as their methods of manufacture, packaging and circuitry incorporating the same for use in a wide variety of power electronic applications are disclosed. One aspect of the invention combines a number of charge balancing techniques and other techniques for reducing parasitic capacitance to arrive at different embodiments for power devices with improved voltage performance, higher switching speed, and lower on-resistance. Another aspect of the invention provides improved termination structures for low, medium and high voltage devices. Improved methods of fabrication for power devices are provided according to other aspects of the invention. Improvements to specific processing steps, such as formation of trenches, formation of dielectric layers inside trenches, formation of mesa structures and processes for reducing substrate thickness, among others, are presented. According to another aspect of the invention, charge balanced power devices incorporate temperature and current sensing elements such as diodes on the same die. Other aspects of the invention improve equivalent series resistance (ESR) for power devices, incorporate additional circuitry on the same chip as the power device and provide improvements to the packaging of charge balanced power devices.
Owner:SEMICON COMPONENTS IND LLC

Power semiconductor devices and methods of manufacture

Various embodiments for improved power devices as well as their methods of manufacture, packaging and circuitry incorporating the same for use in a wide variety of power electronic applications are disclosed. One aspect of the invention combines a number of charge balancing techniques and other techniques for reducing parasitic capacitance to arrive at different embodiments for power devices with improved voltage performance, higher switching speed, and lower on-resistance. Another aspect of the invention provides improved termination structures for low, medium and high voltage devices. Improved methods of fabrication for power devices are provided according to other aspects of the invention. Improvements to specific processing steps, such as formation of trenches, formation of dielectric layers inside trenches, formation of mesa structures and processes for reducing substrate thickness, among others, are presented. According to another aspect of the invention, charge balanced power devices incorporate temperature and current sensing elements such as diodes on the same die. Other aspects of the invention improve equivalent series resistance (ESR) for power devices, incorporate additional circuitry on the same chip as the power device and provide improvements to the packaging of charge balanced power devices.
Owner:SEMICON COMPONENTS IND LLC

Lithium battery pack SOC (state of charge) equalization system and lithium battery pack SOC equalization method

The invention discloses a lithium battery pack SOC (state of charge) equalization system and a lithium battery pack SOC equalization method. The equalization problems of lithium battery packs are divided into two levels, including intra-group equalization and intergroup equalization. Lithium batteries are divided into a plurality of groups, every lithium battery group is in parallel connection with a bidirectional DC-DC converter, the output ends of the bidirectional DC-DC converters are in series connection to serve as the output ends of a direct-current bus and a power generation system, and loads are in parallel connection. The batteries in every group are connected through bilateral switches and are in parallel connection with by-pass switches so as to be connected dynamically. Intergroup equalization is achieved by distributing output voltage of every group according to average SOC thereof; intra-group equalization can be achieved by controlling dynamic connection of every single battery in every group. The lithium battery pack SOC equalization system and the lithium battery pack SOC equalization method have the advantages that lithium battery pack SOC is equalized without an extra equalization circuit, so that energy transfer among the batteries is avoided, lithium battery pack equalization is achieved automatically in a charge-discharge process, the equalization speed is greatly increased and the equalization efficiency is greatly improved.
Owner:HUAZHONG UNIV OF SCI & TECH

Lithium ion battery pack modularization fast equalization circuit and equalizing method

The invention discloses a lithium ion battery pack modularization fast equalization circuit and an equalizing method and belongs to the field of the lithium ion battery pack modularization fast equalization circuit and the equalizing method. The lithium ion battery pack modularization fast equalization circuit and the equalizing method aim at solving the problems that the service life of a whole battery pack is short due to disequilibrium of battery cells, in series connection, in an existing lithium ion battery pack, and an existing ordinary bi-directional equalizer is long in equalizing time. According to the lithium ion battery pack modularization fast equalization circuit and the equalizing method, a lithium ion battery pack is divided into 2N three-cell battery modules, wherein each three-cell battery module is composed of three adjacent lithium ion batteries, the lithium ion battery pack further comprises 2N three-cell equilibrium sub-modules, an equilibrium main module, a switching network, N integration voltage acquisition circuit, a microcontroller, a first energy transmission bus, a second energy transmission bus, a third energy transmission bus and a fourth energy transmission bus, the switching network comprises 2N+1 switches which are M1 to M (2N+1), and the three-cell battery modules and the three-cell equilibrium sub-modules are arranged in a one-to-one corresponding mode. The lithium ion battery pack modularization fast equalization circuit and the equalizing method can be used in a series connection power battery pack.
Owner:HARBIN INST OF TECH +1
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