36results about How to "Avoid Short Board Effect" patented technology

The invention provides a battery pack and a vehicle. A battery cell group (4) is formed in the battery pack (100), the battery cell group (4) comprises a plurality of battery cells, the battery cellscomprise a first battery cell (A) and a second battery cell (B), the first battery cell (A) has better cold resistance than the second battery cell (B), and the arrangement positions of the first battery cell (A) and the second battery cell (B) depend on the heat dissipation capacity in the battery pack (100).

The invention provides a micro-grid new energy hybrid energy storage system which comprises a new energy power generation subsystem, an energy storage carrier subsystem, a converter subsystem, a high / low-voltage power distribution subsystem and a background monitor subsystem. According to the invention, battery equalization is performed through a BMS (battery management system), a cask effect caused by non-uniformity of voltage, capacity and other parameters is avoided, and the phenomena that the capacity of the whole group is reduced and the service life of the battery is shortened due to vicious circle of performance of the battery pack are avoided. Meanwhile, a refrigeration mode of air-conditioning equipment is scientifically controlled through a heat management system, so that the battery keeps a proper, uniform and stable environment temperature in the operating process. Therefore, the service life of the storage battery is prolonged, and the operating cost is effectively reduced. A container modular energy storage scheme is adopted, the system can be designed into a miniature temporary power generation system, and the construction investment is low. The system is convenient to use and can be transported into bad condition environments such as fields for performing power generation and supply under emergency circumstances. The system can be constructed into a large energy storage power station in a centralized mode, and the capacity is conveniently expanded.

The invention provides a gear transmission system design method based on particle swarm two-level optimization. The method comprises the following steps that an optimal objective function is set, an optimal variable to be optimized is set, an optimal constraint is set, and an optimal solution gbest of the optimal variable is acquired through the particle swarm two-level optimization. According to the method, the optimal variable of a gear transmission system is acquired by the adoption of the particle swarm two-level optimization, the first level optimization is focused on meeting the requirement that the standard deviation of safety coefficients of contact fatigue strength of all external gears is small, and acquiring a feasible scheme of the number of gear teeth; and the second level optimization is focused on meeting the requirement that the standard deviation of safety coefficients of bending fatigue strength of all the external gears is small, and acquiring a refinement configuration scheme including all design variables. All strength indexes of the optimal gear transmission system are met, meanwhile, the difference of service lives of all the external gears is relatively small, the problem that short board effect often occurs in the gear transmission system can be avoided effectively, and reliability of the gear transmission system is improved.

The invention provides a data extraction method, device and system based on modulo operation. Therefore, integrity of extracted data is ensured while extraction efficiency is increased. Extraction duration is saved and the requirement for timeliness of the data warehouse level is met. The method comprises the following steps: creating a target list in a data warehouse; determining the number of sections according to an extraction demand, setting number extraction tasks according to the number of sections and configuring number extraction templates for the number extraction tasks by modulo operation; parallely executing the number extraction tasks according to the number extraction templates to extract sectional data; and combining sectional data to the target list.

The invention relates to an explosion suppression filling material with a composite structure. The explosion suppression filling material is formed by coiling or stacking a plurality of layers of metal foil nets layer by layer, wherein the mesh structures and the mesh directions of the adjacent layers of metal foil nets are different; preferably, the mesh directions of the adjacent layers of metal foil nets are vertical to each other, and the mesh directions of spaced layers of metal foil nets are the same or different; the adjacent layers of metal foil nets are made of different materials; the metal foil nets made of different materials at least comprise metal foil nets made of aluminum alloy materials and / or metal foil nets made of stainless steel alloy materials; and preferably, the outmost layer is provided with a metal foil net which has high intensity, high elasticity and high flexibility. The filling material has a rational structure, and is uniformly supported and stressed and low in collapse deformation; the number of produced crumbles is small; the mounting cost is saved; and the fillimg material is convenient to clean, mount and take out, can be reused, has high comprehensive performance, and can be widely applied to various types of storage tanks and particularly used as filling materials for dangerous cargo transportation truck storage tanks.

The invention discloses a high-stress roadway combined ring body beam support structure and a construction method thereof, which belong to the technical field of roadway construction support. For the support ring body, different levels of pull-out anchors and grouting anchors are relatively evenly placed in the surrounding rock, and a relatively uniform steel wire rope net with steel wire ropes as the ribs is pressed under the pressure plate of each layer of anchors. Through the multi-layered strong concrete shotcrete structure that is highly close to the rock surface, the discrete and fragmented surrounding rocks are evenly cemented by applying stabilized pressure and remaining pressure grouting, so as to realize a supporting ring with relatively uniform and greatly improved overall mechanical properties It avoids the short board effect of the support, improves the overall bearing capacity of the surrounding rock, increases the amount of bolt combination in the surrounding rock unit rock body, changes the strength of the single relying on the rock itself, and improves the supporting ring body. The strength of the surrounding rock, together with the cementation of the surrounding rock mass by grouting, improves the mechanical properties of the surrounding rock.

The present disclosure relates to a fraud-related data sharing method, system and medium. The method includes: step S1, receiving in parallel the fraud-related data uploaded by the first user via multiple nodes in real time; step S2, analyzing the fraud-related data, and performing an analysis on the fraud-related data based on the metadata of the fraud-related data Store; step S3, receive the query request of the second user in parallel in real time via the multiple nodes, and find the fraud-related data corresponding to the query request based on the query request; and step S4, according to the query request corresponding to the Metadata of fraudulent data, credit rating of the second user, and send fraudulent data meeting predetermined conditions to the second user; wherein, both the first user and the second user are authenticated users, and the The metadata includes the privacy level and encryption level of the fraud-related data, and the query request includes the identity information of the second user.

A system and method for avoiding the short board effect of a battery pack. The battery pack includes a plurality of electrically connected single cells. The avoiding system includes a main control module, an information collection module, a bidirectional DC conversion module and a power supply module. The power module provides DC signals, and the information collection module collects the parameter information of the single battery and feeds it back to the main control module. After analyzing the parameter information, the main control module determines the short-board battery. Output the first control signal, and output the second control signal when the battery pack is in the discharge state and the short-board battery has been fully discharged; the bidirectional DC conversion module discharges the short-board battery when receiving the first control signal, and when receiving the second control Charge the short-board battery while signaling. The circumvention system controls the bidirectional DC conversion module to charge and discharge the short-board battery accordingly through the main control module, so that it does not affect the overall charge and discharge of the battery pack, and improves the endurance of the battery pack.

The invention provides non-overlapping block and frequency band equivalent fusion combined watermark embedding and extracting methods. The initial values and parameters of a watermark encryption link and a watermark embedding link are generated through the SHA-1 value of a cover image and a secret key given by a user, chaotic mapping is driven to generate a 2-value pseudorandom matrix to encrypt a 2-value watermark and generate random coordinate positions of non-overlapping blocks for an embedded carrier image, 1-level wavelet coefficient Pyramid decomposition is carried out on each random non-overlapping block, frequency band coefficients HL1 and LH1 are fused in an equal weighed manner to form a fusion coefficient, and the quantified value of the fusion coefficient is adjusted to embed a watermark. Watermark embedding and extracting strategies can be disclosed completely; and compared with a traditional disclosed sensitive watermark, the methods of the invention avoid a cast effect caused by that different levels of wavelet coefficients are fused, prevent twice adjustment for watermark extraction via an isolated point filtering strategy, but ensure the sufficiently-high embedded safety level.