20results about How to "Avoid thermal runaway" patented technology

This utility model discloses a stacked energy storage device, including a support plate and several energy storage components. Each energy storage component includes an energy storage unit, support legs, and L-shaped limiting plates. The support legs are fixedly installed at the bottom corners of the energy storage units, and the L-shaped limiting plates are fixedly installed at the top corners of the energy storage units. Multiple energy storage units are stacked together, with the support legs of the upper energy storage units inserted into the inner side of the L-shaped limiting plates on the top surface of the lower energy storage units. Multiple limiting frames are fixedly installed on the top surface of the support plate, with the support legs of the lowest energy storage unit inserted into the inner side of the limiting frames. A support plate is fixedly installed on the top surface of the support plate, and multiple insertion holes are provided on the side of the support plate. This utility model allows multiple energy storage units to be stacked together, and the limiting components, in cooperation with the support plate, limit the movement of the energy storage units, preventing them from shifting.

The present application relates to the field of wisdom agriculture and image recognition technology, specifically to a crop disease and pest monitoring system based on image recognition, comprising: an environment perception module, which obtains the environmental context parameters of the monitoring area through multi-modal sensor nodes; a multi-source context analysis module, which constructs a disease and pest outbreak risk model in combination with historical disease and pest distribution spatio-temporal data and calculates the disease and pest risk level; an adaptive strategy generation module, which dynamically reconstructs the image acquisition mode and feature extraction strategy according to the risk level and the edge side resource constraint state, and generates adaptive perception instructions; an image acquisition execution module, which adjusts the physical acquisition parameters and algorithm calculation density of the visual sensor in response to the instructions, and executes image acquisition and recognition; the present application breaks the traditional rigid acquisition mode and realizes the optimal balance between monitoring efficiency and device survival period.

This invention relates to the field of battery technology, specifically to a composite negative electrode current collector, its preparation method, and its application. The composite negative electrode current collector of this invention includes a polymer material layer, a lithium replenishment layer, and a conductive metal layer. The lithium replenishment layer is located on at least one surface of the polymer material layer, and the conductive metal layer is located on the surface of the lithium replenishment layer away from the polymer material layer. The lithium replenishment layer includes a composite lithium material comprising a lithium metal core and a lithium compound coating layer covering the surface of the lithium metal core. The conductive metal layer has multiple through-hole structures. The composite negative electrode current collector of this invention, through the coordination of its various layer structures, is beneficial for improving the storage performance of the negative electrode, reducing battery impedance, shortening the electrolyte wetting time, enhancing lithium replenishment capacity, preventing the formation of lithium dendrites, and improving battery safety performance.

The application provides a preparation method of 3,7-dinitro-1,3,5,7-tetraazabicyclononane, comprising the following steps: 1) feeding a first material comprising urea and concentrated sulfuric acid and a second material comprising fuming nitric acid and concentrated sulfuric acid into a microchannel reactor to perform a first-stage nitration reaction, to obtain a first-stage nitration reaction liquid; 2) feeding the first-stage nitration reaction liquid into a first tubular reactor to perform a second-stage nitration reaction, to obtain a second-stage nitration reaction liquid; 3) feeding the second-stage nitration reaction liquid and water into a second tubular reactor to perform a hydrolysis reaction, to obtain a hydrolysis liquid; 4) feeding the hydrolysis liquid and a third material comprising polyoxymethylene and ammonia water into a third tubular reactor to perform a condensation cyclization reaction, to obtain 3,7-dinitro-1,3,5,7-tetraazabicyclononane. The preparation method has the advantages of high safety, less waste pollution and simple operation.

The application provides an electrolyte and a battery comprising the electrolyte, wherein the diazonium salt compound in the electrolyte can be decomposed in advance to generate a large amount of inert gas before a large amount of organic solvent is volatilized to generate gas during a furnace temperature test, and the inert gas is discharged from the pole lug, so that the generated heat is timely released, heat accumulation in the interior is avoided, and heat runaway is avoided; on the other hand, the volatilization of the organic solvent can cause the ion channel in the battery to be closed, so that the side reaction is stopped, the battery can safely pass the furnace temperature test, and the safety of the battery under the condition of heat runaway is significantly improved. Meanwhile, the electron-deficient B element in the diazonium salt compound in the electrolyte has Lewis acidity, can accept an electron pair, can remove HF in the electrolyte, avoids the damage of HF to the interface protection film, and further improves the high-temperature storage performance of the battery.

This invention belongs to the field of lithium metal battery technology, specifically relating to a fluorinated phase-separated polymer ion gel electrolyte, its preparation method and application, and lithium metal batteries. The fluorinated phase-separated polymer ion gel electrolyte provided by this invention comprises a solid phase and a liquid phase; the solid phase is a copolymer of a fluorinated acrylate monomer and a crosslinking agent containing carbon-carbon double bonds; the liquid phase comprises an ionic liquid and a lithium salt dissolved in the ionic liquid. Compared to liquid electrolytes and traditional SPEs, the fluorinated phase-separated polymer ion gel electrolyte provided by this invention has high ionic conductivity, mechanical strength, interfacial stability, and safety. It can effectively suppress the growth of lithium dendrites and adapt to large volume changes, avoiding short circuits and thermal runaway in lithium metal batteries under conditions of overcharging, over-discharging, or mechanical impact.

The invention relates to the technical field of fluororubber processing, in particular to a fluororubber sealing element resistant to electrolyte corrosion and a preparation method of the fluororubber sealing element. The fluororubber is prepared from the following raw materials in parts by weight: 100 parts of fluororubber, 10-15 parts of polytetrafluoroethylene micro powder, 4-8 parts of an acid acceptor, 5-7 parts of magnesium-aluminum hydrotalcite, 3-5 parts of polyhedral oligomeric silsesquioxane, 35-40 parts of inorganic filler, 30-35 parts of carbon black, 8-10 parts of an active agent, 2-5 parts of a peroxide vulcanizing agent and 2-5 parts of a cross-linking agent. The fluororubber is composed of low-fluorine-content binary fluororubber and a polyvinylidene fluoride-hexafluoropropylene copolymer, through the synergistic effect of all the components, the volume swelling rate of the sealing element is controlled to be 8% or below under the condition that the sealing element is soaked in an electrolyte at the temperature of 85 DEG C, and the compression set is reduced to be within 15%; and after accelerated aging for 1000 hours, excellent elastic recovery capability and interface sealing pressure are still maintained. The sealing element has the wide temperature range adaptability of-20 DEG C to 200 DEG C and good mechanical strength, and the problem of size instability caused by swelling and softening of traditional fluororubber is effectively solved.

The application relates to a direct-current relay. The direct-current relay comprises a moving spring sheet and an arc striking assembly; the arc striking assembly is arranged on the outer circumferential side of the moving spring sheet and comprises at least one arc striking magnet; wherein the surface of the arc striking magnet facing the moving spring sheet is a curved convex surface. The arc striking assembly can be applied to a scene in which the peripheral magnetic field of the moving spring sheet needs to be increased, can controllably adjust the arc striking strength and effect according to actual application needs, can avoid contact ablation, insulation deterioration, thermal runaway and system-level failure, and can effectively guarantee the safety and reliability of equipment.

The utility model discloses a kind of cooling device and whole package gradient utilization energy storage system, be configured in connecting energy storage box, the inside hollow of energy storage box, cooling device includes: at least one battery tray, at least one cooling component and water tank component, battery tray is connected to the inner wall of energy storage box, the surface of battery tray is formed with first cooling groove, cooling component includes first coil pipe, first coil pipe is embedded in first cooling groove along the orientation of first cooling groove, and abuts at battery pack, water tank component includes water tank and at least one first water pump, water tank is connected to energy storage box, and with the end of first coil pipe is communicated, first water pump is respectively communicated with the inside of water tank and the other end of first coil pipe.The utility model can effectively solve the problem that gradient battery energy storage power station lacks cooling system and cannot regulate or control heat during battery discharging or charging process, leading to security risk in gradient battery energy storage power station.

This application provides a battery charging thermal management control method and a new energy vehicle, relating to the field of vehicle management technology. The method includes: responding to a charging start signal from a target vehicle; acquiring the battery temperature, current state of charge (SOC) parameters, and current ambient temperature of the power battery on the target vehicle; determining a target charging thermal management mode from a set of preset charging thermal management modes based on the battery temperature and the current ambient temperature; determining the current target charging current of the power battery based on the battery's operating temperature range, the current SOC parameters, and the target charging thermal management mode; and during the charging process of the power battery, using the target charging thermal management mode to control the thermal management system of the target vehicle to control the temperature of the power battery, ensuring that the battery temperature remains within the corresponding operating temperature range. This application avoids unnecessary energy loss from the power battery, thereby reducing the overall vehicle charging energy consumption.

This invention belongs to the field of batteries, specifically a high-capacity battery assembly. It overcomes the technical challenges of high cost and heavy weight inherent in existing high-capacity batteries. The assembly includes a pressure-bearing casing and a high-capacity battery and heat exchange device located within the casing. The high-capacity battery comprises a shared pipeline and n individual cells arranged along the x-direction, with their internal cavities connected by the shared pipeline. Each individual cell has a plastic casing with a strength P, where P1 ≤ P ≤ P2. P1 represents the strength requirement of the casing during the formation stage and normal charge / discharge stages, while P2 represents the strength requirement during thermal runaway. The pressure-bearing casing has a vent connected to the shared pipeline. The heat exchange device is located at the top of the high-capacity battery, with the polarity terminals of each individual cell passing through it. Compared to finished battery cells, the individual cells of this invention offer advantages in terms of light weight and low cost.

The present disclosure provides a sodium-ion battery charging temperature protection circuit, which comprises a first control module, a second control module and a normally closed temperature switch. The control end of the first control module is connected with a charger identification signal end, the first end is connected with the first end of the normally closed temperature switch, and the second end is grounded. The control end of the second control module is connected with the second end of the normally closed temperature switch, the first end is connected with a power supply end, and the second end is connected with a charging output end. The sodium-ion battery charging temperature protection circuit does not rely on an integrated circuit chip for battery protection to achieve temperature protection, and detects the temperature of the sodium-ion battery by using the normally closed temperature switch. When the battery temperature exceeds a safety threshold, the circuit can timely cut off the charging circuit, effectively preventing the sodium-ion battery from appearing thermal runaway phenomenon, improving the safety of the energy storage sodium-ion battery, and avoiding relying on the temperature protection function of the integrated circuit chip, thereby reducing the circuit use cost.

This invention discloses a phase change material composite fiber separator, its preparation method, and its application. The separator's main components are fibers and a phase change material. In this invention, the fibers act as a skeletal support in the separator, exhibiting non-shrinkage at high temperatures and a high porosity. The phase change material in the separator is characterized by a set temperature point; it can absorb a large amount of heat and then undergo a phase change. When a lithium battery malfunctions and the temperature continues to rise to a certain level, the phase change material begins to absorb a large amount of heat, thereby lowering the lithium battery temperature. If the lithium battery cannot cool down after the phase change material absorbs heat, the phase change material will transition from a solid to a liquid state. The gaps between the solid phase change materials will be closed, achieving pore sealing and cutting off the internal ion channels of the lithium battery, thus preventing thermal runaway and providing safety protection.

The application discloses a kind of multistage active and passive protection battery module of lithium ion battery, including lithium ion battery body and metal shell, the inside of the metal shell is equipped with heat control mechanism, the lithium ion battery body is equipped in heat control mechanism inside, the upper end of the lithium ion battery body is equipped with tab, pressure relief valve and fire-retardant agent respectively, the inside bottom of the metal shell is equipped with liquid cooling plate, the lithium ion battery body is equipped in the upper end of liquid cooling plate, the inside upper end of the metal shell is fixedly installed with energy directional pipe, the inside of the energy directional pipe is equipped with fire-resistant pressure-resistant cover plate, the upper end of the fire-resistant pressure-resistant cover plate is equipped with one-way spray valve, the left and right sides of the metal shell are symmetrically equipped with vent opening.This scheme is through fire-retardant agent on the lithium ion battery body and the buffer zone above cooperation, when lithium ion battery body occurs thermal runaway, temperature rises, reaches the melting point of wrapping material, fire-retardant agent is released into buffer space, can effectively inhibit fire.

This invention relates to the field of battery technology, specifically to a separator. The separator includes a base film layer and a polymer coating located on at least one surface of the base film layer. The polymer coating comprises a sponge-like porous structure. A plurality of polymer particles protruding from the surface of the polymer coating are disposed on the side of the polymer coating facing away from the base film layer. The maximum height difference between the plurality of polymer particles is H μm, satisfying 0.2 μm ≤ H μm ≤ 15 μm. The separator of this invention, with its sponge-like porous polymer coating and the uneven polymer particles with height differences on the coating surface, can effectively improve the problem of positive electrode breakage caused by battery expansion.

This invention relates to the field of power equipment protection and thermal management control, specifically to a solid-state dry-type transformer winding temperature rise overload protection system, comprising: a storage module for storing historical overload events, a data acquisition module for collecting real-time winding temperature rise data and real-time load data, a quota evolution module for calculating dynamic thermal capacity quota, a memory correction module for extracting thermal fatigue memory decay rate and correcting thermal capacity quota, an overload prediction module for calculating elastic overload survival time, and an adaptive intervention module for performing flexible derating operation or physical isolation tripping, and adjusting the subsequent derating magnitude according to the flexible intervention smoothness index; this invention enables the calculable utilization of the winding transient overload capacity and suppresses cumulative insulation damage caused by continuous thermal shock.

The application relates to a high-density battery structure which comprises a top cover, a box body, a battery cell module, a protection plate and a panel; the battery cell module is arranged in the box body; the top cover covers the top of the box body; the panel covers the end face of one end of the box body, and the panel is arranged in abutment with the top cover; the battery cell module comprises a first battery cell module, a second battery cell module and a third battery cell module; the first battery cell module and the second battery cell module are adjacently and symmetrically arranged; the third battery cell module is arranged close to the panel; and the protection plate is arranged on the top of the third battery cell module. Through the structure, the problems of heat of the battery cell module and insufficient space of the box body can be effectively solved. The application has the advantages of simple structure, convenient disassembly and assembly, easy maintenance, long service life of the battery, high practicability and economy, wide application range, and can be produced and used as a general product.

The invention relates to a housing (1) for an electrical energy storage battery, comprising a tray (2) configured such that a power element (3) of the battery is attached thereto, a protective cover (5) covering the tray (2), and means for mechanically attaching the protective cover (5) to the tray, the tray (2) comprises means for electrical connection of the batteries and thermal control means (6) for the power elements (3). The tray and the protective cover form a structure for suppressing any thermal runaway of the power element (3), the enclosure comprising a battery management system (16), at least a portion (16a) of which is mounted outside the containment structure and in heat exchange relationship with the thermal control means (6) of the power element (3).

The utility model relates to lithium cell technical field, concretely is a kind of constant-current constant-voltage heating pad control circuit based on PWM. Including asynchronous buck circuit, gate drive circuit, voltage control drive circuit, PWM control circuit, MCU chip, the LCSG_DriveA0 port of asynchronous buck circuit, LCSG_DriveB0 port are sequentially connected the LCSG_DriveA0 port of gate drive circuit, LCSG_DriveB0 port, the VSamp port of asynchronous buck circuit is connected the VSamp port of PWM control circuit, the CON_PWM port of gate drive circuit is connected the CON_PWM port of PWM control circuit, the REF_PWM port of voltage control drive circuit is connected the VRef port of PWM control circuit, the one PE pin of MCU chip is connected the HEAT_OFF port of gate drive circuit, another PE pin of MCU chip is connected the CL_PWM port of voltage control drive circuit. Compared with prior art, realize the dynamic regulation of heating pad current, ensure that constant-current constant-voltage output is to heating pad both ends, improve energy conversion efficiency.

This invention proposes a gallium nitride-based semiconductor laser with a graded thermal conductivity waveguide layer. By fitting the In ion intensity distribution or In atom concentration distribution, the transverse phonon velocity distribution, and the thermal conductivity distribution of the graded thermal conductivity upper and lower waveguide layers using SIMS testing, all of these curves satisfy the Stirling function or the LineMod function. The gradient of the transverse TA phonon velocity homogenizes phonon scattering in the lower waveguide layer, reduces thermally induced lattice distortion, avoids optical field mode distortion, and improves the optical field confinement factor. The gradient of the transverse phonon velocity homogenizes the temperature distribution in the upper waveguide layer, changing the thermal stress from concentrated to distributed, reducing phonon transport loss caused by interface scattering. It avoids the "bottleneck effect" of heat flow at the interface between the active region and the lower waveguide layer, further reducing the temperature coefficient of the threshold, accelerating heat flow to the substrate, and preventing thermal runaway caused by increased driving current after exceeding the threshold.