3020 results about "Voltage fluctuation" patented technology

Disclosed herein are a variety of different electrical system topologies intended to mitigate the impact of large intermittent loads on a 12 volt vehicle power distribution system. In some embodiments the intermittent load is disconnected from the remainder of the system and the voltage supplied to this load is allowed to fluctuate. In other embodiments, the voltage to critical loads is regulated independently of the voltage supplied to the remainder of the system. The different topologies described can be grouped into three categories, each corresponding to a different solution technique. One approach is to regulate the voltage to the critical loads. A second approach is to isolate the intermittent load that causes the drop in system voltage. The third approach is to use a different type of alternator that has a faster response than the conventional Lundell wound field machine.

The invention discloses a cascade utilization screening method of waste power batteries. The method comprises the following steps of: (1) charging a waste power battery pack, so that the state of charge (SOC) of the waste power battery pack is 15 to 80 percent; (2) detecting the open-circuit voltage and internal resistance of each single battery; (3) connecting the single waste power batteries in parallel until the open-circuit voltages of the single waste power batteries are basically the same, comparing the open-circuit voltages of the connected batteries with the open-circuit voltage of each single battery which is not connected in parallel, recording a voltage fluctuation situation, putting the waste single batteries and standard single batteries at the temperature of 30 to 55 DEG C for 3 to 7 days or at room temperature for 10 to 30 days, and detecting the open-circuit voltages and the internal resistance of the waste single batteries and the standard single batteries; and (4) comparing the single waste power batteries in terms of appearance, open-circuit voltage, internal resistance, voltage fluctuation and health, classifying the single waste power batteries, and matching battery packs in the same class with an energy storage power grid. The method is simple, the utilization rate of power batteries is improved, the usage cost of energy storage batteries is reduced, and the large-scale screening, classification and cascade utilization of waste power batteries can be realized.