48results about How to "Guaranteed Power Density" patented technology

The present disclosure relates to compositions comprising at least two different carbonaceous components, at least one being a surface-modified carbonaceous particulate material typically having a relatively high spring-back, and at least one other component being a carbonaceous particulate material (such as graphite) generally having a lower spring-back and / or a higher BET specific surface area than the surface-modified carbonaceous material component. Such compositions are particularly useful for making negative electrodes for lithium-ion batteries and the like in view of their beneficial electrochemical properties, particularly in automotive and energy storage applications. The present disclosure also relates to the use of a low-spring-back carbonaceous particulate materials as an additive in carbonaceous compositions, wherein said compositions are used to prepare anodes for Li-ion batteries in order to increase the electrode density, the cell capacity and / or the cycling stability of said battery while maintaining the power density of the cell compared to a cell with an anode absent the carbonaceous additive.

The invention belongs to the field of all-solid-state ultrafast laser technology, and discloses a femtosecond laser generation system with a high-power GHz repetition rate, a multimode fiber-coupled 981nm laser diode as a pump source; a collimation and focusing system, and a pump laser focusing to the center of the laser crystal to form a pump focus spot; the first concave mirror is used for reflection; Yb:KGW crystal is vertically cut and placed in the ring cavity; the second concave mirror is used for reflection; Kerr medium is used for Provide additional Kerr effect; the third concave mirror is used to provide second-order dispersion to compensate for intracavity dispersion; the fourth concave mirror is used to output high-power mode-locked femtosecond laser pulses. The invention can produce femtosecond laser pulses with high power GHz repetition frequency with excellent performance, compact structure, stable operation and low price by rationally designing the resonant cavity structure and using Kerr lens mode-locking technology and dispersion compensation technology.

The invention discloses a serial-parallel hybrid power drive device of a commercial vehicle. Only one clutch is arranged to achieve serial-parallel working condition switching, the speed increase of a generator is achieved through a speed increase planet row, the speed reduction and torque increase of a motor are achieved through a speed reduction planet row, and both the structure and the process are simple, which facilitates the layout of a power system of the commercial vehicle. The drive device specifically comprises an input shaft, the speed increase planet row, the generator, the motor, the clutch, the speed reduction planet row and an output shaft. In the drive device, pure electric drive or serial hybrid power drive is adopted for the start, low speed and medium speed working conditions; under the serial hybrid power working condition, the motor drives the generator to generate power through the speed increase planet row, the generator can work in an economical fuel consumption section at the moment, and redundant electric energy can be stored in a battery pack for pure electric running of the motor; under the high-speed parallel working condition, the clutch is engaged, power of the motor directly drives the vehicle to run, one time of energy conversion is omitted, and the drive efficiency is improved.

The invention discloses a mixed excitation permanent magnet motor based on a three-stage stator axial complementary structure. An outer stator of the mixed excitation permanent magnet motor comprisesthree outer stator stages arranged along the axial direction in an equally-spaced manner, the difference of the initial angles of every two adjacent outer stages is a mechanical angle alpha, and alphais equal to 360 degrees / p, wherein p is the number of pole-pairs of the motor, p is equal to 3i, and i is a positive integer; an armature winding is wound on the outer stator teeth of each outer stator stage respectively, and each armature winding is a fractional-slot concentrated winding respectively; the rotor is an internally installed V-shaped rotor with heteropolarly alternated poles, the rotor is provided with 2p / 3 permanent magnet pole pairs and p / 3 iron core pole pairs; an exciting winding is wound on the inner stator teeth of the inner stator, the number of pole-pairs of the excitingwinding is p / 3, and each exciting winding is an integer slot distributed winding respectively. The flux density of an outer air gap can be changed by taking the iron core pole of the rotor as a channel in a rotating magnetic field generated by the inner stator, and the problem that the counter potential amplitudes are unequal existing in the heteropolarly alternated poles is solved. Moreover, themanufacturing cost and demagnetization risk are reduced while the reliability is improved.