8results about How to "Avoid chain reaction" patented technology

This invention belongs to the field of wet electronic chemicals technology, specifically relating to a method for preparing electronic-grade hydrogen peroxide. The method includes the following steps: adjusting the concentration of raw hydrogen peroxide, and then filtering it sequentially through a reverse osmosis membrane, a modified cation exchange resin, an anion exchange resin, and a mixed ion exchange resin to obtain electronic-grade hydrogen peroxide. The modified cation exchange resin used is modified based on conventional cation exchange resin through pore expansion and grafting, optimizing the spatial matching of pore structure and functional sites. This achieves passivation of metal ions, enhanced adsorption capacity, and improved oxidation resistance, as well as a deep synergistic effect of these three effects. Ultimately, it achieves the dual goals of efficient purification and stable operation of the resin in the hydrogen peroxide system. The resulting electronic-grade hydrogen peroxide can reduce the content of single impurity metal ions to below 5 ppt, meeting the requirements of SEMI G5 standards, and can be directly applied to high-end manufacturing fields such as semiconductor wafer cleaning.

The application belongs to the field of battery state monitoring, and discloses a battery thermal runaway early warning method based on a single-point thin film pressure sensor. A single-point thin film pressure sensor is arranged between adjacent battery cells in a battery pack to sense the battery cell pressure signal in real time. The charging and discharging process of the battery pack is monitored through the battery cell pressure signal, and the cycle pressure peak value sequence and the valley value sequence of the last N charging and discharging cycle periods of each battery cell in the charging and discharging process are recorded adaptively, and the dynamic grading pressure early warning threshold of each battery cell is calculated based on the sequence. The battery cell abnormality is identified and the thermal runaway early warning is performed according to the dynamic grading pressure early warning threshold. The application effectively offsets the interference of factors such as the battery cell manufacturing tolerance, the sensor individual difference, the installation deviation and the battery cell expansion caused by the charging and discharging cycle through the dynamic grading threshold of each battery cell, so that the early warning result is more suitable for the actual state of the battery, and a reliable basis is provided for the thermal runaway early identification.

The invention relates to the technical field of new energy automobile charging equipment, and discloses a new energy automobile mobile charging robot which comprises a mobile chassis, a box shell is fixedly mounted at the top of the mobile chassis, a damping base is fixedly mounted at the inner bottom of the box shell, and a plurality of battery grooves are uniformly formed in the surface of the damping base; storage battery packs are fixedly mounted on the surfaces of the battery grooves correspondingly, a heat conduction plate is fixedly mounted at the bottom of the damping base, polished rods are movably mounted on the front side and the rear side of the inner bottom of the movable chassis correspondingly, and a plurality of flame-retardant outer plates are movably mounted on the outer diameters of the polished rods correspondingly; and flame-retardant inner plates are movably mounted in the flame-retardant outer plates through push-out springs. Mobile flexible charging is achieved, dual safety protection of waste heat self-driven efficient heat dissipation, nitrogen fire extinguishing and flame-retardant blocking is achieved, the advantages of being convenient and fast to operate, high in energy utilization rate, reliable in structure and the like are achieved, and the charging stability and safety are greatly improved.

The application belongs to the field of batteries, and particularly relates to a battery pack and a heat transfer pipe. The application overcomes the problem of local high heat of a single battery pole in an existing battery pack, which causes thermal runaway. The battery pack comprises a plurality of battery components; the battery components comprise a battery module and two heat transfer pipes; the battery module comprises a plurality of single batteries; the two heat transfer pipes are arranged on total positive terminals and total negative terminals of the battery module respectively; each heat transfer pipe is provided with two mutually isolated sub-channels; in the plurality of battery components, the heat transfer pipes are connected in series in a set order; after cooling liquid enters a total liquid inlet end, the cooling liquid flows through one sub-channel in each heat transfer pipe in turn, and then flows through the other sub-channel in each heat transfer pipe in turn through a loop turning node, and finally flows out from a total liquid outlet end. The application directly contacts the heat transfer pipe with the polarity terminals of the single batteries, and simultaneously realizes efficient and balanced heat dissipation of the polarity terminals based on the series connection structure of the heat transfer pipes.

The utility model discloses a high-voltage live display locking device for monitoring leakage current, which belongs to the technical field of lightning arrester monitoring and comprises an electric leakage detection module, a signal processing module, a master control module, an alarm module, a locking module and a power supply module. The electric leakage detection module is used for collecting a leakage current signal and transmitting the leakage current signal to the signal processing module; the signal processing module converts the leakage current signal into a voltage signal and transmits the voltage signal to the main control module; the main control module responds to the voltage signal to generate an alarm signal and a blocking signal; the alarm module responds to the alarm signal to execute an alarm action; the locking module responds to the locking signal to execute a locking action; the power supply module provides working voltage for the electric leakage detection module, the signal processing module, the main control module, the alarm module and the locking module. According to the utility model, the problem of low safety caused by the fact that the electrification condition of the lightning arrester corresponding to other electrical equipment is not considered in the prior art is solved.

The application provides a bus side knife switch operation risk assessment method and device, and relates to the technical field of electric power engineering. The method comprises the following steps: if the knife switch in the power system is a bus side knife switch, the wiring type of the power system is obtained; then, according to the wiring type, the operation type corresponding to the wiring type is determined; then, according to the wiring type and the operation type, the simulation fault equipment of the power system is determined; finally, according to the simulation fault equipment, the power grid accident risk level of the power system is determined. Through the method, the accuracy of the risk assessment of the bus side knife switch operation can be improved.

The application relates to the technical field of data security, and discloses an enterprise trusted data access method and system based on a block chain, which comprises the following steps: constructing a sandbox activity coordinate system to identify potential bifurcation risks and generating a risk assessment report; extracting an affected sandbox list in the risk assessment report, creating a three-dimensional space coordinate system of a dependency relationship, generating a sandbox dependency fingerprint, drawing a dependency trajectory path, and exporting a dependency influence matrix; constructing a multi-sector time sequence coordination disc according to the dependency influence matrix to obtain a time sequence correctness guarantee state; and executing an influence range adaptive isolation mechanism by using the time sequence correctness guarantee state and the dependency influence matrix; the application can effectively avoid sandbox state bifurcation and guarantee the trustworthiness and stability of enterprise data access.

A battery module according to one embodiment of the present disclosure comprises: a battery cell stack in which a plurality of battery cells are stacked, and a heat sink located on one side of the battery cell stack, wherein the heat sink includes a cooling pipe, at least one rupture part, and a sealing material layer.