538 results about "Thermal safety" patented technology

The invention discloses a thermal management control method for a power battery. The method comprises the following steps: establishing a basic model for calculating heating and cooling of the battery; basic control logic is set, and the basic model is substituted into different temperatures to select different control modes; data management and analysis including real-time state monitoring, historical data calling, cloud platform data calling and big data comparison rule searching; a model learning algorithm is introduced, historical working conditions, environmental parameters and user behavior data are fused, the system temperature trend is predicted, and temperature management is started in advance; a temperature control model is dynamically optimized through big data; the optimal energy consumption of the control temperature is used as a target function; and 5) fault early warning: obtaining characteristic laws of temperature, voltage, time and the like during a thermal event and each fault event, and realizing early warning when the vehicle has similar characteristics. According to the invention, temperature uniformity control in the whole life cycle of the power battery can be realized, the service life of the battery is prolonged, and timely early warning can be carried out on thermal safety control.

The invention discloses a lithium battery thermal parameter online monitoring method and equipment. According to the method, a one-dimensional heat transfer model of the battery is established, and a finite element model is solved by inversion of battery surface temperature change actually measured in operation, so that combined monitoring of the heat conductivity coefficient, the convective heat transfer coefficient, the average temperature and the heat production power P of the lithium battery is realized. Meanwhile, only the temperature sensor needs to be arranged on the surface of the battery, the battery does not need to be disassembled or an internal sensor does not need to be implanted, the battery integrity is kept, and the method is suitable for battery full-life-cycle monitoring. According to the method, the key thermal parameters of the lithium battery can be identified online in a non-intrusive, low-cost and high-reliability manner, support is provided for thermal management, health assessment and thermal safety early warning of the battery, and the method is suitable for various battery configurations and thermal management systems.

The invention provides a pole charging variable flow thermal safety control method and system based on AI multi-objective optimization, and relates to the technical field of pole charging variable flow thermal safety control, and the method comprises the steps: collecting the electrical state quantity and thermodynamic state quantity of a pole charging converter in real time; constructing a digital twinborn model of the polar charging converter; constructing a DRL training environment, and training a DRL intelligent agent; setting a security guard strategy independent of the DRL intelligent agent; the optimal optimization strategy is deployed to a converter control system, and the converter and a cooling system are controlled in real time; and carrying out on-line calibration on key parameters of the digital twin model. According to the method, the digital twinborn model is constructed and the DRL is combined to carry out multi-objective optimization decision making, so that intelligent, accurate and adaptive control on the thermal safety of the electrode charging converter is realized; the digital twin is self-calibrated, so that the thermal management level, the operation efficiency, the reliability and the long-term adaptability to equipment aging and environment change of a converter system are effectively improved.

The invention relates to the technical field of energy storage battery performance detection, and discloses a performance detection device and method for an energy storage battery, and the method comprises the steps: calculating a thermal safety coefficient based on the internal temperature of the battery, the temperature gradient, the Joule heat generation rate and the environment temperature; calculating a voltage safety coefficient based on the battery end voltage, the voltage change rate and the voltage range; according to the thermal safety coefficient, the voltage safety coefficient, the battery expansion strain and the internal pressure, calculating the collaboration reflecting the multi-physical field state coordination; calculating an aging coefficient based on the accumulated current stress, the accumulated cycle index and the high stress duration of the battery; and finally, based on the collaboration, the aging coefficient and the rated current, calculating the target charging and discharging current and performing real-time adjustment. The device comprises a memory and a processor and is used for executing the method. According to the invention, multi-dimensional fusion evaluation and self-adaptive management of thermal, electrical and mechanical states and aging processes of the energy storage battery are realized, and the operation safety and service life of the battery are remarkably improved.

The invention discloses a diaphragm and an electrochemical device, and belongs to the field of electrochemical energy storage. The diaphragm is used for the electrochemical device and comprises a base membrane and a coating arranged on one side or two sides of the base membrane in the thickness direction, the coating comprises a composite phase-change material, the composite phase-change material comprises a conductive polymer layer and a tubular material, the conductive polymer layer partially or completely coats the surface of the tubular material, and the tubular material is coated with the conductive polymer layer. A phase change material is contained in the tube of the tubular material. According to the diaphragm, the high-temperature thermal safety performance of the diaphragm can be improved under the condition that the high-temperature mechanical performance of the diaphragm is not damaged.

The invention provides an energy storage battery liquid cooling dual-mode heat management and battery storage space heat recovery temperature and humidity coordinated regulation and control system and method. The system is composed of a heat pipe cooling module, a steam compression refrigeration cycle module and a module for waste heat recovery and runner regeneration. The heat pipe cooling module and the circulating pump form a natural cooling loop through the liquid cooling plate and the heat pipe heat exchanger; the vapor compression refrigeration cycle module efficiently and rapidly reduces the temperature of cooling liquid through a phase change refrigeration working medium. And the waste heat recovery module uses condensation waste heat for rotary wheel dehumidification regeneration. The system automatically switches double modes according to the temperature of cooling liquid: heat pipe energy-saving cooling is started when the temperature is lower than or equal to 35 DEG C, steam compression refrigeration is switched when the temperature is higher than 35 DEG C, and condensation waste heat of the two modes preheats regenerated air through a heat pipe heat exchanger, then the temperature is supplemented to the regeneration temperature through an electric heater, a rotating wheel is driven to dehumidify, and dry air is fed into a battery cabin. The method gives consideration to energy efficiency and thermal safety, and is suitable for thermal management and space humidity regulation and control of an energy storage battery system.

The embodiment of the invention provides a method and a device for determining thermal safety margin of a reactor core, and belongs to the technical field of nuclear power. The method comprises the steps that initial information of various fuel assemblies in a reactor core is obtained, and the initial information comprises stirring and mixing grillwork geometric characteristics of the fuel assemblies and test results obtained by conducting a critical heat flux density test on the fuel assemblies; determining a target critical heat flux density relational expression corresponding to the reactor core according to the initial information of the multiple fuel assemblies; and performing thermal safety margin calculation on the reactor core according to the target critical heat flux relational expression to obtain a target thermal safety margin. According to the embodiment of the invention, the problem of low accuracy of thermal safety margin calculation of the reactor core in the prior art can be solved, the characteristic difference of different types of fuel assemblies is fully considered, and the accuracy of a thermal safety margin analysis result is improved.

The invention discloses a wall breaking machine overload dynamic control method based on multi-source signal fusion, and particularly relates to the field of control and regulation, and the method comprises the steps: firstly executing multi-source signal collection and feature enhancement processing, synchronously collecting electrical, motion, mechanical and thermal signals, and extracting a related feature set after preprocessing; secondly, carrying out multi-dimensional complex coupling analysis, constructing functions of load intensity, mechanical state and thermal safety to quantify single-field risks, and designing three coupling terms of load and machinery, machinery and heat and load and heat to represent a multi-field synergistic effect; generating a comprehensive risk value and a dynamic threshold value, solving the risk value and speed increase, setting the threshold value in a grading manner by combining mode characteristics, and identifying a dominant coupling item; and finally, executing four-stage progressive regulation and control, and starting early warning preparation, card breaking intervention, emergency dredging and final recovery or shutdown actions according to a risk state. According to the invention, physical driving is taken as a core, accurate quantification of risks and coupling-oriented regulation are realized, and equipment safety and effect are both considered.

The invention belongs to the technical field of thermal management of immersed liquid-cooled batteries, and particularly relates to a battery module temperature equalization and flow resistance self-adaptive liquid cooling system based on temperature and flow velocity monitoring. Multi-point temperature information of a battery module is obtained through a temperature monitoring unit, and a temperature equalization index is calculated; the flow resistance change of the liquid cooling loop is judged by combining the flow speed monitoring unit with the running state of the circulating cooling pump, and the central control unit dynamically adjusts the rotating speed of the circulating cooling pump and / or controls the flow channel adjusting assembly to switch the cooling liquid flow channel based on the combination result of the temperature uniformity state and the flow resistance state. Therefore, the temperature consistency of the battery module and the self-adaptive control of the flow resistance of the liquid cooling system are realized under different operation conditions, the cooling of a key area can be enhanced when local hot spots exist, the flow path is optimized and the energy consumption is reduced when the flow resistance is increased or the load is relatively low, the thermal safety, the operation stability and the energy efficiency level of the battery system are improved, and the service life of the battery system is prolonged. The method is suitable for liquid cooling heat management scenes of high-energy-density batteries.

The invention provides a silicon-based material and a preparation method thereof, a lithium ion battery monomer, a battery device and a power utilization device, the silicon-based material comprises a porous carbon matrix and silicon nanoparticles located in pores of the porous carbon matrix, the surface of each silicon nanoparticle is provided with a silicon oxide passivation layer formed through a passivation reaction, the ratio of the ID / IG of the silicon-based material to the ID / IG of the porous carbon matrix before the passivation reaction is (0.95-1.05): 1; the mass multiple of the Si element and the C element in the silicon-based material is recorded as A, the mass multiple of the Si element and the C element before the passivation reaction is recorded as B, and the ratio of A to B is (0.95-1.05): 1. According to the invention, the thermal safety performance, the cycle performance and the rate capability of the lithium ion battery monomer can be improved.

The invention discloses a socket with safety protection. The socket comprises a multi-mode thermal sensing array, and a fusion array of a miniature infrared thermal imaging sensor array and a distributed fiber grating temperature sensor which are integrated at key points in the socket; according to the active locking mechanism based on the thermal deformation prediction model, a micro servo motor, a ball screw, a pre-tightening spring and a spring bolt form an electronic lock, a shape memory alloy wire is used for rapid and silent emergency unlocking, and the micro servo motor is used for high-precision conventional locking; the dynamic thermal safety boundary algorithm module is used for dynamically calculating the optimal temperature upper limit and the optimal power upper limit of each component in the current state according to factors such as a real-time temperature field, predicted thermal deformation, current charging power and historical charging data; the main controller is used for transmitting a large amount of real-time temperature field data. Through multi-mode sensing, predictive modeling and master-redundancy cooperative execution, thermal safety and mechanical reliability of the charging interface under extreme working conditions are guaranteed.

The invention relates to the technical field of battery thermal safety management, and discloses an energy storage battery thermal runaway intelligent early warning method and system based on machine learning, and the method comprises the steps: obtaining an energy storage system cooling layout parameter and a sensor data flow, generating a data missing mode recognition result containing a missing time period, a missing position and a missing type; probability distribution of temperature and flow physical quantity of the missing sensor is inferred through a message passing mechanism, and a numerical value distribution inference result of the missing sensor is output; posterior state distribution is calculated through Bayesian reasoning, and a virtual-real mixed thermal state estimation result is generated; and analyzing a thermal state estimation result based on a confidence coefficient weighted multi-objective optimization algorithm, constructing a multi-objective function including weighted risk minimization and cooling energy consumption cost minimization, and outputting a cooling control instruction. The technical problem that a traditional digital twinning system is highly dependent on data integrity is solved.

The utility model provides a CCS thermal safety combination device for all-cell signal acquisition, which comprises a plastic uptake isolation plate used for being electrically connected with a battery assembly, the plastic uptake isolation plate is provided with a cell area and positioning areas, and the positioning areas are arranged on two opposite sides of the cell area; the FPC is mounted in the battery cell area and is electrically connected with the blister isolation plate; the fireproof sheet is arranged corresponding to the FPC and the blister isolation plate so as to cover the surface of the FPC and the surface of the blister isolation plate; and the insulating sheet covers the fireproof sheet and is fixedly connected with the blister isolation plate. The fireproof sheet is placed on the FPC to avoid the battery cell explosion-proof valve, and the whole insulating sheet is placed at the top end of the fireproof sheet, so that the battery cell can be effectively protected, heat spreading during thermal runaway of the battery cell is prevented, the risk of thermal runaway of the battery cell is reduced, and the maintenance and replacement cost of the battery is reduced.

The invention provides a capsule binder, a binder composition, a diaphragm and a battery in order to solve the problems of easy powder falling and poor thermal safety of a diaphragm binder in the prior art. The capsule binder comprises a core body and a polymer layer which is arranged on the outer surface of the core body and at least partially covers the core body, and the core body comprises a phase change material; the polymer layer comprises a polymer, and the polymer comprises an acrylate structural unit, a hydrophilic functional structural unit and a crosslinking structural unit; the mass ratio of the phase change material to the acrylate structural unit to the hydrophilic functional structural unit to the crosslinking structural unit is (40-60): (20-40): (1-5): (5-20). According to the capsule binder provided by the invention, the phase-change material is introduced into the core body, and when the internal temperature of the battery rapidly rises to the phase-change temperature of the core body, the phase-change material absorbs heat to slow down the temperature rise, so that the possibility of a thermal runaway accident is reduced, and the safety performance of the secondary battery is improved.

The invention relates to the technical field of machine room environment regulation and control, in particular to a communication base station intelligent energy-saving window control design method and system, and the method comprises the steps: obtaining and classifying base station source load data, setting energy-saving window parameters and an off-network strategy, monitoring a power supply state, and cooperatively controlling temperature control equipment in combination with electric quantity temperature difference. According to the method, the thermodynamic state is digitalized by calculating the outdoor cold source potential energy gradient and the indoor thermal load cumulative acceleration and combining the enthalpy difference allowance so as to accurately evaluate the natural cold source potential; the optimal ventilation opening degree and the fan rotating speed are matched through multi-dimensional feature clustering, so that the condensation risk is strictly restrained according to dew point approximation deviation while the heat dissipation efficiency is guaranteed, and in addition, a dual-target evaluation function in an off-grid scene is constructed to solve a non-dominated solution set of endurance time and thermal safety. A dynamic protection threshold value is generated; and when the commercial power is interrupted, a control strategy is adaptively adjusted according to the real-time load and the environment temperature, so that the off-network life cycle of the base station is maximized, and core equipment is ensured to always run within a safe temperature boundary.

The invention provides a positive pole piece, an electrochemical device and an electronic device, the positive pole piece comprises a positive current collector, a positive active material layer and a coating, the coating is located on the surface and / or inside the positive active material layer, and the coating comprises an organic compound, the organic compound comprises at least one functional group of a cyano group, an isonitrile group, an azinyl group and an isocyanate group, the thickness of the coating is 0.3-3 [mu] m, and the ratio of the thickness of the coating to the thickness of the positive electrode active material layer is 1: (5-50). The positive pole piece provided by the invention can improve the thermal safety, the high-temperature cycle performance, the high-temperature storage expansion rate and the mechanical safety of the electrochemical device.

The invention is suitable for the technical field of electrochemical energy storage, and provides an integrated structure solid-state battery module constructed based on SiO2 aerogel powder and a preparation method of the integrated structure solid-state battery module. And a stress buffering-ion conduction-thermal triggering self-repairing collaborative interface system is constructed. According to the Janus powder, a ZrO2 nanocluster and a SiO2 network form a rigid core, a dynamic shell containing a Diels-Alder dynamic covalent bond is grafted on the outer surface and the inner wall of a pore channel, and a lithium salt-ionic liquid compound is loaded in pores; a vertical columnar stress supporting framework is formed through a transient liquid phase auxiliary cold sintering process, and two-step thermal triggering self-repairing treatment is combined, so that stress buffering of electrode volume change in the charging and discharging process and interface self-repairing in the early stage of thermal abuse are achieved. The interface stability, the cycle life and the thermal safety of the solid-state battery are remarkably improved, and the solid-state battery is suitable for power batteries, high-capacity energy storage batteries and other scenes.

The invention relates to the technical field of battery pack energy storage control, and discloses a battery pack thermal runaway protection method and system, and the method comprises the steps: collecting the real-time parameters of a battery cell; a control instruction is generated to drive a cluster-level electromagnetic valve to spray; multi-parameter trend consistency verification is executed; after receiving the signal, the fire-fighting host judges whether full-cluster spraying is triggered or not; and subsequent closed-loop control is completed. In the prior art, static judgment is carried out based on a single temperature or voltage threshold, and especially under the complex working conditions that thermal runaway development of a battery cell has nonlinear mutability, local sensing point abnormity or communication delay, linkage response processing of a real thermal runaway event cannot be realized. Due to the fact that the layered trend fusion judgment mechanism and the after-fire-extinguishing temperature trend closed-loop verification mechanism are constructed, the complete closed-loop process from early-stage thermal runaway judgment to multi-stage linkage spraying to fire extinguishing effectiveness feedback is achieved, and the thermal safety protection capacity under the extreme working condition is improved.

The invention relates to a lithium ion battery thermal runaway multi-dimensional signal coupling test device in the technical field of lithium ion battery thermal safety. The lithium ion battery thermal runaway multi-dimensional signal coupling test device comprises a closed test container, a signal acquisition system, an optical visualization system, a temperature control system, a gas acquisition system and an inflation system, the closed test container is a cube, four orthogonal through holes are formed in the front, rear, left and right outer walls of the closed test container, and optical glass is mounted on the left and right through holes; the signal acquisition system comprises an impact force sensor, a pressure sensor, a thermocouple, a battery test system, a data acquisition card and an analysis device; the optical visualization system comprises a camera, a point light source, a reflecting mirror, a concave mirror and a blade; the temperature control system comprises a heating rod, a heating sheet, a power supply and a controller; the gas collection system comprises an exhaust channel, a gas collection bag and a gas chromatograph; the inflation system comprises an inflation pipeline, a pressure regulating valve and an inert gas tank. According to the invention, the air injection state generated by the battery or the battery module in the thermal runaway process can be intuitively reflected.

The invention discloses a positive electrode interface layer material for an all-solid-state battery and a preparation method of the positive electrode interface layer material, and relates to the technical field of solid-state batteries. According to the interface layer material provided by the invention, an ion-electron co-conduction network is formed through in-situ polymerization, a cured interface layer with flame-retardant and interface wetting functions is constructed between positive electrode particles and a solid electrolyte, and the cured interface layer comprises the following components: a polymerizable monomer, a flame retardant, an interface wetting agent, a lithium salt, a conductive agent, an initiator and a solvent. According to the material, the polymerizable monomer, the flame retardant and the interface wetting agent are synergistically introduced in a specific manner, so that the thermal safety of the battery is remarkably improved, and meanwhile, the interface contact and lithium ion transmission kinetics between a positive electrode and a solid electrolyte are effectively improved, so that the comprehensive optimization of the safety and the electrochemical performance is realized.

The invention relates to the technical field of new energy, in particular to a multi-stage compound positive electrode material as well as a preparation method and application thereof, and the compound positive electrode material comprises a phosphate spherical material, phosphate single particles and a ternary material which are compounded in a three-stage mixing manner; the phosphate spherical material is formed by aggregating primary particles, the particle size distribution consistency ((D90-D10) / D50) is 1.2-2.0, the closed pore porosity in the spherical material is less than or equal to 5vol.%, and the phosphate single particles are obtained by crushing and dissociating the phosphate spherical material. Phosphate spherical materials and single particles are prepared through hydro-thermal synthesis, the phosphate spherical materials are formed by agglomeration of nano-particles and have good rate capability and nitrogen-containing pores (with excellent thermal resistance), and the single particles are ternary materials for gap filling and thermal resistance. The advantages of a ternary material and a phosphate material are coordinated, and the energy density, the thermal safety and the service life of the battery are optimized.

The invention provides a diaphragm and a secondary battery, and belongs to the technical field of secondary batteries, and the diaphragm comprises a base membrane and a coating. Wherein the coating is arranged on one surface, facing the positive pole piece, of the base film, and the coating comprises an electroactive material and a binder; the electroactive material comprises at least one of a quinone derivative, a phenazine derivative, an imide derivative and a phenothiazine derivative. The electroactive material in the diaphragm coating can be dissolved in the electrolyte after the environment temperature reaches the thermal safety critical temperature, and reacts with the positive and negative active materials, so that the charge state of the battery is quickly reduced, and the thermal runaway of the battery is inhibited or even avoided.

The utility model relates to a battery cluster and a battery energy storage system, the battery cluster comprises a battery rack, a plurality of battery plug-in boxes, a high-voltage box and a fire extinguishing system, the plurality of battery plug-in boxes are arranged on the battery rack, and the plurality of battery plug-in boxes are used for mutual connection through high-voltage cables; the high-voltage box is arranged on the battery rack and is used for being connected with the plurality of mutually connected battery plug-in boxes through high-voltage cables; and the fire extinguishing system is arranged on the battery rack. The fire extinguishing system is independently integrated in the battery cluster, so that the thermal safety management of the battery cluster level is realized, and the safety of a single battery cluster is improved.

The invention provides a thermal runaway sensing and inhibiting method and system for an energy storage system and a medium, and the method comprises the steps: carrying out the real-time data collection of the interior of the energy storage system based on a multi-type sensor, obtaining multi-source collection data, carrying out the fusion processing of the multi-source collection data, and obtaining fusion data; constructing a real-time state vector of the energy storage system based on the fused data, and performing feature extraction and trend analysis on the state vector based on a multivariable discrimination algorithm to obtain state information of the energy storage system; judging whether to enter a thermal runaway evolution channel or not based on the function state information of the energy storage system, outputting a risk level, dynamically matching an intervention measure, and transmitting the risk level and the matched intervention measure to a terminal in real time for monitoring; according to the invention, accurate identification is carried out through multi-dimensional parameters at the initial stage of thermal runaway, a sensing-discrimination-suppression closed-loop safety control mechanism is realized, the control response is rapid, intervention measures can be rapidly started, the overall thermal safety level of the system is improved, and the accident rate is reduced.

The invention belongs to the technical field of transmission cooling and lubricating, and relates to a transmission rear end forced lubricating and cooling system of a parallel hydrodynamic retarder and a transmission. Comprising a retarder support, a rear cover, an oil pump, a power takeoff side cover, a rear bearing cover, an oil pump diverter valve, a cooling lubricating oil way, an oil filtering plug screw and a net type oil filter. The oil pump diverter valve is used for being connected with an external heat exchanger, oil in an oil way is cooled, the temperature of lubricating oil is effectively reduced, and thermal safety of parts in the box body is guaranteed. Under the condition that other structures of the gearbox are not added, all-directional lubrication inside a rear-end transmission system is achieved, and the structural compactness and the space utilization rate are improved. Lubricating points of the lubricating system are comprehensively covered, oil duct connection of different shells is achieved through butt joint of the cross-joint-surface oil ducts, the lubricating system is compact in design, and the comprehensive performance, safety and reliability of a transmission system are improved in the aspects of heat dissipation, cooling, fatigue and efficiency of the system.

The invention, which relates to the technical field of thermal safety monitoring and control of the battery replacement cabinet, discloses a safety control method for a battery replacement cabinet based on an intelligent Internet of Things. According to the invention, a multivariable time sequence anomaly detection model is combined with a long and short term memory auto-encoder and an attention mechanism, deep features can be extracted from voltage, current and environment temperature data, and the thermal safety of the battery replacement cabinet is monitored and controlled. Internal heat accumulation initial signals which are difficult to capture by an external sensor are effectively identified; according to the data driving method, the limitation of traditional fixed threshold monitoring is overcome, and sensitive capture of subtle abnormal changes is realized by dynamically learning a normal charging and discharging mode, so that the early warning opportunity is advanced, and the risk of missing report caused by surface temperature lag is reduced; the dynamic threshold mechanism is adaptively adjusted based on the quantile of the target false alarm rate and the working condition parameters, so that the system can flexibly cope with complex factors such as different environment temperatures and battery aging degrees, the false alarm problem caused by a unified threshold is avoided, and the early warning accuracy is improved.

The invention relates to the technical field of power battery thermal engineering and thermal safety, and discloses a liquid cooling-phase change coupling battery thermal management system based on a liquid phase rate weighting method, and the system comprises a battery module which is formed by stacking and arranging a plurality of single batteries along a first direction; the liquid cooling plate is arranged on the side surface of the battery module and is used for carrying out active heat dissipation on the battery module; the plurality of phase change material units are respectively filled between the adjacent single batteries; wherein the thicknesses of the plurality of phase change material units are non-uniformly distributed, the thickness of each phase change material unit is positively correlated with the corresponding average liquid phase rate reference value, and the average liquid phase rate reference value is the average liquid phase rate reference value of the corresponding phase change material unit under the same thickness setting condition. And the average liquid phase rate of the phase change material unit under the preset discharge working condition is obtained through thermal simulation calculation. According to the invention, the maximum temperature difference in the battery module is obviously reduced, the phase change process synchronization of each region is realized, the material utilization rate is improved, and the thermal stability of the system in the high-rate dynamic discharge process is enhanced.

The invention relates to the technical field of heating, in particular to a heating system based on waste heat recovery of a generator set, which comprises a waste heat collection unit comprising a plate heat exchanger and a cooling tower which are connected in parallel on a condenser circulating pipeline of the generator set, and a switching valve group is arranged between the plate heat exchanger and the cooling tower; the underground energy storage unit comprises a first mining and recharging well and a second mining and recharging well which are connected with the plate heat exchanger through a heat exchange pipeline, and the bottoms of the first mining and recharging well and the second mining and recharging well are thermally coupled through a high-heat-conduction filling layer; the heat pump unit comprises a lithium bromide absorption heat pump, and a low-temperature heat source inlet of the lithium bromide absorption heat pump is connected with an outlet of the plate heat exchanger and a water pumping pipeline of the first mining and recharging well in parallel. Compared with the prior art, the system has the advantages that the underground energy storage unit and the switching valve group are arranged to operate cooperatively and work cooperatively, heat supply safety is guaranteed, meanwhile, overground and underground integrated waste heat regulation, storage, release and control are achieved, and the stability, the regulation capacity and the energy comprehensive utilization efficiency of the system are improved.

The invention discloses a lithium battery thermal runaway triggering method, and relates to the technical field of battery thermal safety. The method comprises the following steps: determining a target gap area between adjacent roll cores in a target lithium battery; forming a through hole in a battery shell corresponding to the target gap area; a conductive metal needle is inserted into the target gap area through the through hole; connecting the conductive metal needle with an external power supply; and supplying power to the conductive metal needle through the external power supply, so that the conductive metal needle emits heat in the target gap area to trigger thermal runaway. The thermal runaway triggering energy consumption can be remarkably reduced, and the economical efficiency of the triggering process is improved.

The invention relates to a method of operating and / or fueling a compressed gas supply system (34) having at least two compressed gas tanks (15, 16, 17, 18, 19) connected to an anode path (2) of a fuel cell system (1).To increase thermal safety during operation and / or fueling of the compressed gas supply system (34), the valve devices (21, 22, 23, 24, 25) assigned to the pressure tanks (15, 16, 17, 18, 19), which comprise a filling path with an actively switchable filling valve and a discharge path with an actively switchable discharge valve for each of the compressed gas tanks (15, 16, 17, 18, 19) are individually actuated via an electronic control unit, which is connected to a sensor device having at least one sensor, which senses a current temperature in the respective valve installation (21, 22, 23, 24, 25).