625 results about "Maximum temperature" patented technology

The invention discloses a mass concrete intelligent temperature monitoring system and method, and the system comprises a high-precision temperature sensor, a data collection node which is connected with the high-precision temperature sensor and is responsible for carrying out the primary processing and integration of temperature data collected by the sensor, and a data collection terminal which serves as a data convergence center of the whole monitoring system and is used for collecting the temperature data. The intelligent temperature monitoring system comprises a plurality of data acquisition nodes which are connected in a wired or wireless communication mode, a data monitoring platform which operates at a server end and is a core control and management unit of the whole intelligent temperature monitoring system, and a circulating water cooling control system which is composed of a cooling water pump, a cooling tower, a cooling water pipe network, a temperature control main station and the like. The cooling water pipe network is embedded in the concrete in advance to form a closed water circulation loop; the temperature control master station receives a cooling control instruction sent by the data monitoring platform, and adjusts the rotating speed of a cooling water pump and the working state of a cooling tower according to the instruction, so that the flow and temperature of cooling water in a cooling water pipe network are accurately controlled; through flowing of circulating water in the concrete, redundant heat in the concrete is taken away, effective regulation and control over the temperature in the concrete are achieved, key indexes such as the highest temperature and the temperature gradient of the concrete are controlled within a reasonable range all the time, and concrete cracks caused by temperature stress are avoided.

The invention provides a frying and baking equipment heat preservation automatic control method and system, and relates to the technical field of food processing equipment control, and the method comprises the steps: collecting temperature signals of different positions through a plurality of groups of thermocouples and infrared thermal imaging sensors which are arranged in a frying and baking area, constructing a dynamic three-dimensional temperature field model, and obtaining a dynamic three-dimensional temperature field model; calculating a temperature standard deviation and a maximum temperature gradient in real time according to the dynamic three-dimensional temperature field model; and when the temperature standard deviation is larger than or equal to a preset threshold value, according to the heat distribution difference of the three-dimensional temperature field model, a multi-region differential compensation strategy is generated, the power distribution proportion of each heating unit is dynamically adjusted, and the duty ratio parameter of pulse width modulation is optimized in real time. Through multi-sensor accurate monitoring, dynamic regulation and control and intelligent stop judgment, uniform and stable temperature control, energy conservation and consumption reduction are achieved, the service life of equipment is prolonged, meanwhile, the use safety of a user is guaranteed, and the cooking experience is improved.

The invention relates to the technical field of temperature control, and particularly discloses a micro-reactor real-time control system for fine chemical engineering, and the system comprises an acquisition module which calculates a standard temperature according to the temperature at a monitoring point, and periodically obtains the standard temperature in a preset acquisition period; the analysis module is used for calculating a temperature difference value, obtaining a maximum temperature difference value and obtaining a temperature change value; coordinate points are generated and fitted to obtain a fitted curve, and the total number of reference points on the fitted curve is counted; and the adjusting module is used for calculating the judgment value, determining whether to adjust the power of the temperature adjusting module or not according to the judgment value, and adjusting the power of the temperature adjusting module according to the fitting curve. According to the invention, the environment temperature in the microreactor can be kept stable, and the complexity of controlling the temperature in the pipeline is reduced.

The invention discloses a liquid cooling method and device for a battery pack, and relates to the field of liquid cooling, and the method comprises the steps: constructing a simulation model according to a battery cell and a cooling liquid in the battery pack; performing discharge simulation on the simulation model to obtain temperature value distribution of a battery cell of the simulation model and a flow value and a temperature value of cooling liquid; when the maximum temperature value and the maximum temperature difference are both minimum values, the flow value and the temperature value of the cooling liquid are determined according to the influence relation between the maximum temperature value and the maximum temperature difference and the flow value and the temperature value of the cooling liquid; and performing liquid cooling on the battery pack according to the flow value and the temperature value of the cooling liquid. The battery pack is simulated, the simulation model simulates the power generation state of the actual battery pack, the flow value and the temperature value of the cooling liquid of the simulation model are adjusted to reach the maximum temperature value and the minimum maximum temperature difference of the battery pack, liquid cooling of the battery pack is achieved based on the flow value and the temperature value of the simulation model, and the whole process is short in period and high in efficiency. And actual battery pack verification is not needed, so that the cost is reduced.

The invention discloses cleaning equipment and a control method thereof, a medium and a system.The cleaning equipment comprises a controller, and the controller is configured to control a heater liquid pump to supply liquid to a heater according to a first flow if the temperature of the heater falls into a first temperature interval in a steam mode; if the heater temperature falls into a second temperature interval, a heater liquid pump is controlled to supply liquid to the heater according to second flow larger than the first flow, and the minimum temperature of the second temperature interval is larger than the maximum temperature of the first temperature interval; and / or if the temperature of the heater falls into the third temperature interval, controlling the heater to operate according to the first power; if the temperature of the heater falls into a fourth temperature interval, the heater is controlled to operate according to second power smaller than the first power, and the minimum temperature of the fourth temperature interval is larger than the maximum temperature of the third temperature interval. Through the technical scheme provided by the invention, the reliability of executing the cleaning task by the cleaning equipment in the steam mode can be ensured.

The invention relates to the technical field of semiconductor electrical equipment cooling, and discloses an electrical control cabinet cooling device and a control method thereof. The thermal load trend, the maximum temperature rise expected value and the temperature rise rate change interval in the electrical control cabinet can be predicted in real time based on historical operation data training and the current operation state. The method comprises the following steps: carrying out prospective evaluation on a cooling demand by combining a feature extraction mechanism and a time sequence modeling capability so as to output a more refined predictive control parameter, and finally generating a multi-dimensional cooling control instruction according to the predictive control parameter and a current operation state so as to realize dynamic scheduling of a cooling assembly. And the response timeliness and the energy efficiency matching degree are obviously improved.

The embodiment of the invention relates to the technical field of electronic atomization, and discloses a control method and an aerosol generating device.The control method comprises the steps that in the first time stage of the smoking period, a power source is controlled to supply energy to a heater, so that the temperature of the heater is at the first temperature or below the first temperature. In a second time phase during the suction, the power source is controlled to intermittently supply energy to the heater a plurality of times such that a maximum temperature reached after the energy supply is greater than the first temperature. By means of the method, the temperature of the heater fluctuates in a wave shape in the second time stage, and the highest temperature is larger than the first temperature. On one hand, stable aerosol can be generated in the smoking period, and it is beneficial for keeping the aerosol to have a good taste. On the other hand, energy supply is intermittently carried out, the intermittent suction habit of a user is met, and aerosol waste caused by the fact that aerosol is continuously baked at high temperature to form a substrate is avoided.

An electric vehicle charger includes a processor. The processor is configured to identify a first temperature and a second temperature from a sensor. The processor is configured to determine a rate change of temperature based on at least the first temperature at the first time point and the second temperature at the second time point. The processor is configured to prevent a maximum temperature threshold for the electric vehicle charger from being reached. The processor being configured to prevent the maximum temperature threshold from being reached includes the processor being configured to control an output of the electric vehicle charger based on the determined rate change of temperature and a predicted time to maximum temperature threshold.

The present invention provides a method for analyzing the highest temperature experienced by an electrothermal alloy based on surface color. The 0Cr25Al5 electrothermal alloy and its products work in an air atmosphere and a high temperature environment. The surface is oxidized at high temperature to produce an oxide film. The higher the temperature, the faster the oxidation speed, and the thicker the oxide film thickness. The oxide film is extremely thin and dense, and can show interference colors. The color of the interference color is related to the thickness of the oxide film. After the 0Cr25Al5 electrothermal alloy and its products experience high temperature oxidation for a certain period of time, the thickness of the oxide film generated is related to the highest temperature experienced. The visible light reflectivity test using a spectrophotometer can obtain the visible light wavelength with the highest reflectivity. Substituting it into the formula given by the present invention, the highest temperature experienced by the 0Cr25Al5 electrothermal alloy and its products can be calculated. The advantages of the method of the present invention are: no need to prepare for the test in the early stage; no need to observe the 0Cr25Al5 electrothermal alloy and its products when they are working; non-contact type is adopted, and the surface of the test object is not damaged.

The invention discloses a large-space temperature distribution optimization method for an electronic clean workshop, and the method comprises the steps: determining the initial design parameters of a clean room, including the design temperature difference delta Tset of the clean room, the initial arrangement rate and wind speed of a fan filter unit, and the comprehensive heat transfer coefficient K of an enclosure structure; calculating outdoor heat transfer heat flow density q; dividing the upper interlayer space into a plurality of areas, and calculating the average temperature of each area of the upper interlayer; calculating the space temperature distribution of the clean room; the maximum temperature difference delta Tmax of the clean room is calculated, and the deviation ratio delta between the maximum temperature difference delta Tmax and the designed temperature difference is calculated; when delta Tmaxgt; delta Tset or delta gt; when a threshold value is set, the heat transfer resistance of the enclosure structure, the average arrangement rate of fan filter units and the air speed are adjusted; and outputting the adjusted heat transfer resistance of the enclosure structure of the clean room, the average arrangement rate and wind speed of the fan filter units and the arrangement rate of the fan filter units in the partial area of the clean room. According to the method, the temperature distribution of the large-space clean room can be quickly calculated, and the temperature distribution of the large-space clean room can be accurately controlled.

The invention discloses a battery thermal management strategy determination method, device and equipment, a medium and a vehicle, a plurality of working conditions of a battery and battery body heating power corresponding to each working condition are determined, temperature rise corresponding to each working condition is determined in sequence according to a descending order of closeness of the working conditions and a preset charging cut-off working condition, and the battery thermal management strategy is determined according to the temperature rise. And determining a first working condition in which the sum value of the set temperature included in the plurality of working conditions and the corresponding temperature rise is greater than the maximum temperature, and determining a cooling power starting temperature threshold corresponding to each set SOC in the plurality of working conditions according to the set temperature included in the first working condition. According to the embodiment, the cooling power starting temperature threshold values corresponding to the multiple set SOCs can be determined, transient thermal management of the battery can be achieved based on the cooling power starting temperature threshold values corresponding to the multiple set SOCs, and compared with a traditional method for determining thermal management based on an initial working condition for thermal management, transient thermal management is more accurate, and the reliability of thermal management is improved. And the battery charging rate can be effectively improved.

The invention belongs to the technical field of data processing, and provides a heat dissipation balance control method and system for a lithium battery energy storage system, and the method comprises the steps: dividing a lithium battery into a plurality of regions according to the model and thermal characteristics of the lithium battery, obtaining the region voltage of each region through an open-circuit voltage test, and calculating the temperature of each region according to the region voltage; the maximum temperature and the minimum temperature are screened out according to the temperatures of all the areas, and whether a heat dissipation starting threshold value is met or not is judged according to the difference value between the maximum temperature and the minimum temperature; when the heat dissipation starting threshold value is met, the optimal heat dissipation amount is calculated based on a preset algorithm; and the optimal control mode is screened out from the preset control modes according to the heat dissipating capacity, the output power of the draught fan is controlled through the screened control mode to achieve air cooling heat dissipation, and when the difference value of the maximum temperature and the minimum temperature is within a preset threshold value, the draught fan is closed. According to the invention, heat dissipation of the lithium battery energy storage system can be quickly and effectively balanced and controlled.

The invention discloses a power distribution cabinet bus temperature change analysis and early warning method and system, and relates to the technical field of data processing. The method comprises the steps of obtaining bus current data and bus temperature data of a target power distribution cabinet in a preset period and environment temperature data of an environment where the target power distribution cabinet is located; based on the bus temperature data, generating temperature change curves of a plurality of time periods; determining the maximum temperature rise value in each time period in combination with each temperature change curve and the environment temperature data, and determining the reference temperature threshold value of each time period according to each maximum temperature rise value; compensating the reference temperature threshold value of each time period according to the bus current data to obtain an early warning temperature threshold value of each time period; and receiving the bus temperature value of the target power distribution cabinet in the current time period, and when the bus temperature value in the current time period is greater than the early warning temperature threshold value in the corresponding time period, performing early warning on the target power distribution cabinet. By implementing the technical scheme provided by the invention, the effect of improving the accuracy of analysis and early warning of the temperature change of the bus of the power distribution cabinet is achieved.

The invention discloses a temperature monitoring method for a rotating part of a grain conveyor and related equipment, and relates to the field of temperature monitoring. By adopting the technical scheme, the temperature monitoring system acquires the bearing temperature data under the no-load working condition and the full-load working condition, and draws the bearing temperature change thermal distribution diagram based on the bearing temperature rise data, so that the temperature distribution characteristics of the bearing can be comprehensively mastered. An angle sensor and a temperature sensor array are arranged at the position with the maximum temperature gradient, a temperature monitoring system can obtain the corresponding relation between the temperature and the angle in the bearing rotating process in real time, and bearing rotating temperature characteristic parameters such as the angle temperature difference value, the temperature fluctuation amplitude and the temperature change rate are calculated based on the corresponding relation. The temperature monitoring system compares the bearing rotation temperature characteristic parameter with a preset temperature early warning threshold value, and the abnormal operation type of the bearing can be accurately recognized.

The invention discloses a charging current MAP automatic test method based on an HIL rack, and the method comprises the following steps: simulating the condition states of a single battery corresponding to different temperature parameters and voltage parameters through the HIL rack according to the requirements of a test working condition; based on the temperature parameter and the voltage parameter, executing the following operations through an HIL rack: acquiring a maximum voltage effective value Vmax, a minimum voltage effective value Vmin, a maximum temperature effective value Tmax and a minimum temperature effective value Tmin of the single battery under a test working condition; a charging MAP table is inquired through the combination of four parameters of Vmax, Vmin, Tmax and Tmin, and a minimum current value CurrentRequest is output by adopting an extreme value selection logic; under the same working condition, the CurrentRequest is compared with a requested charging current value sent by the BMS, and if the difference value of the CurrentRequest and the requested charging current value is within a preset error range, it is judged that the test is passed; otherwise, determining that the test is not passed. The HIL rack automatically calculates a correct charging current value which is compared with a BMS calculation value, manual intervention is not needed, and the test efficiency is greatly improved.

A device for monitoring a maximum temperature reached during landing by a brake of landing gear of an aircraft. The monitoring device uses a prediction model to estimate a maximum temperature reached by the brake during landing. An error between the estimated maximum temperature and the measured maximum temperature is determined, and if the error is greater than a first predefined threshold, when the measured maximum temperature is greater than the estimated maximum temperature, or a second predefined threshold, when the measured maximum temperature is less than the estimated maximum temperature, and if a total number of errors is greater than a third predefined threshold, then a warning message is generated for attention of the flight crew and / or ground crew. It is thus possible to anticipate maintenance actions on landing-gear components.

A method of managing inter Radio Access Technology (RAT) handover of a User Equipment (UE) in a wireless communication system, includes: detecting, by the UE, a communication session established via a higher priority RAT managed by a network; determining, by the UE, whether measurements related to a lower priority RAT is configured in the UE by the network; detecting, by the UE, a temperature of the UE, the temperature being reaching each of a plurality of pre-defined temperature levels, wherein the plurality of pre-defined temperature levels are lesser than a pre-defined maximum temperature level; and transmitting, by the UE, one or more requests to the network for performing inter RAT handover from the higher priority RAT to the lower priority RAT, based on the determined measurements and the detected communication session.

The invention relates to the technical field of crystal furnaces, in particular to a temperature control system and method for a crystal furnace, and the method comprises the steps: setting the target temperature of the crystal furnace, heating the crystal furnace through a heater, and monitoring the internal temperature of the crystal furnace in real time through a temperature sensor; crystal growth is guided through seed crystals in the crystal furnace, and airflow distribution in the crystal furnace is guided through a guide plate; determining whether the temperature control stability of the crystal furnace meets the requirement or not based on the maximum temperature difference quantity in the crystal furnace; if the temperature control stability of the crystal furnace does not meet the requirement, whether the duty ratio of a heater needs to be increased or not is determined; determining whether thermal management in the crystal furnace meets requirements based on the growth rate of the crystal in the crystal furnace; determining whether the rotation speed of the seed crystal needs to be increased; and determining whether the angle of the guide plate in the crystal furnace needs to be increased based on the fluctuation amplitude of the pressure in the crystal furnace. The temperature control stability of the crystal furnace is improved.

The invention relates to the technical field of aero-engine turbine blades, and discloses a method and system for evaluating a machined blade, and the method comprises the steps: obtaining a maximum size deviation value of the machined blade and a designed blade profile through the extraction of machined blade surface data of the turbine blade; carrying out temperature field simulation analysis on the machined blades and the designed blade profile to obtain the ratio of the highest temperature in the temperature field of each machined blade to the average value of the surface temperature of the designed blade profile, so as to construct a function relational expression between the ratio and the maximum relative deviation value of the size of the corresponding machined blade; and calculating a ratio calculation value of the to-be-analyzed and processed blade profile by adopting the function relation so as to judge whether the to-be-analyzed and processed blade meets the use requirement, the evaluation method considers the temperature field influence caused by the size deviation of the processed blade during actual manufacturing, the judgment efficiency and accuracy of the effectiveness of the processed blade are improved, and the evaluation method has the advantages of being high in practicability and easy to popularize. And it is ensured that the machined turbine blade meets the design requirement.

The present invention provides a human body position detection method, system, device and smart home device. The method includes: using a pyroelectric sensor to scan and collect temperature data of a detection area; selecting temperature data that is greater than or equal to a minimum temperature threshold and less than or equal to a maximum temperature threshold, and connecting the selected temperature data to outline a temperature distribution contour, forming n intervals; scanning and collecting temperature data of the detection area again at an interval time t, selecting temperature data that is greater than or equal to the minimum temperature threshold and less than or equal to the maximum temperature threshold, and connecting the selected temperature data to outline a temperature distribution contour, forming n intervals; calculating the width difference between the corresponding intervals of the two detected temperature data, and if the difference is greater than or equal to a width difference threshold, determining that the corresponding interval is an occupied interval. The present invention determines whether there is a person not only based on temperature, but also restricts it from whether the target object moves, reducing false judgments caused by non-human heat generation.

The invention discloses a quick positioning method for a pipeline water leakage point, relates to the technical field of pipeline water leakage positioning, and solves the problem that the original positioning process cannot be accurate to which kind of pipelines have water leakage conditions. According to the quick positioning method, circular ring zoning is carried out through set related circular rings from the determined subarea with the maximum temperature difference, so that the positioning accuracy is improved. Then, on the basis of the divided specific circular ring areas, the associated temperature mean values of the corresponding circular ring areas are locked, the corresponding temperature mean values are sequenced, on the basis of specific numerical value characteristics of sequencing, specific confirmation of hue partition is carried out, and on the basis of a confirmation result, corresponding water leakage signals are generated, so that related positioning of water leakage points can be effectively completed, and the accuracy of water leakage detection is improved. And the water leakage condition of the pipeline can be locked and displayed in time, so that external personnel can check the water leakage condition, overhaul the water leakage condition in time and take corresponding measures.

The invention provides a liquid cooling control method, electronic equipment and a storage medium. The liquid cooling control method comprises the following steps: acquiring a current operation mode of a liquid cooling device of the energy storage system; when the current operation mode is the refrigeration mode, the highest battery temperature and the average battery temperature in the energy storage system are obtained; and if the highest temperature of the battery is greater than or equal to a preset first refrigeration temperature threshold value and the average temperature of the battery is greater than or equal to a preset first average temperature threshold value, reducing a target liquid cooling temperature of a refrigeration mode, so that the liquid cooling device performs refrigeration according to the reduced target liquid cooling temperature. When the current operation mode of the liquid cooling device is the refrigeration mode, if the maximum temperature of the battery and the average temperature of the battery are relatively high, the target liquid cooling temperature of the liquid cooling device is further reduced to enhance the refrigeration effect, so that the battery can be better maintained in a relatively good operation temperature interval, and the service life of the battery is prolonged. Therefore, the service life of the battery and the overall efficiency and economic benefits of the energy storage system are improved.

The invention provides a stratum gap plugging method, device and equipment, a storage medium and a product, and the method comprises the steps: determining a gap region in response to detection of a gap in a stratum; calculating the adding mass of the plugging substance; the plugging substance is a substance capable of flexibly expanding along with temperature rise; the initial expansion temperature of the plugging material is greater than or equal to the highest temperature of the shaft; the shaft bears drilling fluid, and the plugging substance with the added mass is uniformly distributed in the drilling fluid; and the temperature of the gap area is controlled to rise, so that the plugging substance with the added mass is subjected to flexible expansion to plug the stratum gap. The plugging substance is a flexible plugging substance, and after the temperature rises, the plugging substance expands in the stratum gap, so that the plugging substance can be better filled in the stratum gap, and the plugging effect can be improved.

The invention provides a graphitization furnace comparison verification temperature measurement method and system and a medium, and the method comprises the steps: obtaining the parameter information of a graphitization furnace, and setting a plurality of infrared high-temperature thermodetectors and a plurality of memory graphite rods; collecting real-time temperature data of the furnace core area, and analyzing and processing the real-time temperature data to obtain infrared temperature measurement data; taking out the plurality of memory graphite rods from the graphitization furnace, and carrying out multi-dimensional measurement analysis on the memory graphite rods based on a plurality of measuring instruments to obtain burning loss degree quantitative data; performing maximum temperature inversion on the memory graphite rods placed at different positions of the furnace core area based on the burning loss degree quantitative data to obtain maximum temperature distribution conditions of different positions of the furnace core area; the infrared temperature measurement data and the highest temperature distribution condition of the memory graphite rod are compared and verified, and the real temperature of the furnace core area is obtained; through combination of the infrared high-temperature measuring instrument and the memory graphite rod, cross validation is realized, and the accuracy of a temperature measurement result is improved.

The utility model discloses a pot liner and an electromagnetic cooking utensil, the pot liner comprises a low-permeability metal base body and at least one local high-permeability magnet, and the low-permeability metal base body forms a pot body with an accommodating cavity; the local high magnetizers are arranged on the low-permeability metal base body, and every two adjacent local high magnetizers or the adjacent part of a single local high magnetizer are arranged in a spaced mode in at least one of the radial direction, the circumferential direction and the height direction of the pot body. A distance D is formed between two adjacent local high magnetizers or between adjacent parts of a single local high magnetizer, and the distance D is related to at least one of the heat conductivity coefficients lambda1 and lambda2, the thicknesses d1 and d2, the maximum temperature difference delta T and the heat flow density q. According to the utility model, an obvious temperature gradient can be generated in a local temperature difference area during cooking, and heat convection in the pot becomes fast and violent by utilizing the temperature gradient, so that liquid and food materials in the pot are boiled and turned over more fully, the food materials are heated more uniformly, and cooked food tastes better.

The invention discloses a method and a device for monitoring the temperature of a busbar of a flexible direct-current transmission power sub-module. The method comprises the following steps: acquiring operation parameters of a converter valve under different temperature conditions; inputting the operation parameters into the busbar temperature prediction model, and outputting a corresponding busbar temperature prediction value; the busbar temperature prediction model is obtained by training a least square support vector machine model by taking historical operation parameters as input and historical busbar temperature as output; acquiring temperature values at a plurality of contact points of the surface of the busbar and the sensing optical fiber, and selecting a maximum temperature value from the temperature values at the plurality of contact points as an actual temperature value of the busbar; and calculating a temperature difference value between the busbar temperature prediction value and the busbar temperature actual value, and monitoring the temperature state of the busbar according to a temperature difference value calculation result. The operation safety and stability of the converter valve can be improved.

The invention discloses a method for evaluating rock mass fracture freeze-thaw fracture damage risk based on surface temperature, which comprises the following steps: S1, carrying out data acquisition on a target area based on a multi-source sensor carried by an unmanned aerial vehicle platform, and obtaining fracture geometric parameters, daily surface minimum temperature, daily surface maximum temperature, daily temperature difference and fracture moisture conditions; s2, on the basis of the geometric parameters of the crack, constructing a crack frost heaving force analytical model; obtaining a quantitative relation between the stress intensity factor and the environment temperature; s3, the I-type fracture toughness of the target rock mass is measured, and the critical crack initiation temperature of the rock mass is determined; determining the number of critical freezing and thawing cycles; s4, on the basis of the daily earth surface minimum temperature, the daily temperature difference, the fracture moisture condition and the critical crack initiation temperature, the annual accumulated effective freezing and thawing cycle number is obtained; and calculating a freeze-thaw damage ratio, and carrying out risk quantification and grading. According to the invention, the problem of inaccurate evaluation caused by limitation to local monitoring and lack of an environment factor and material parameter integrated evaluation framework in the prior art is solved.

The embodiment of the invention discloses a control method and device for a vehicle cooling water pump, a vehicle and a storage medium. The method comprises the steps that the current temperature of a motor and the maximum temperature rise of the motor after high-speed emergency power-off of the vehicle are obtained; acquiring a current rotating speed and a weak magnetic rotating speed of the motor; if the current temperature of the motor is larger than or equal to the first over-temperature threshold value and smaller than a preset second over-temperature threshold value, and the current rotating speed is larger than or equal to the flux weakening rotating speed, the cooling water pump is controlled to be started. According to the method, the maximum temperature rise of the motor after high-speed emergency power-off of the vehicle can be understood and predicted, and when the maximum temperature rise of the motor and the rotating speed of the motor meet preset conditions, it is determined that the current backflow phenomenon occurs, a cooling water pump is controlled to be started, and a motor control loop composed of a motor controller, a motor controller node and the motor is cooled. Therefore, the problems of serious heating of a motor control loop, sharp temperature rise of a motor controller node and damage of the motor controller node caused by the current backward flowing phenomenon after the vehicle is powered off emergently at a high speed are avoided.

The invention provides a battery management apparatus and a battery management method. The battery management apparatus includes: a temperature sensor that measures a temperature of each partition of each battery cell constituting a battery module; a thermal management module for heating or cooling each battery cell or each partition thereof; and a processor that calculates maximum inter-cell temperature differences (dCell1 to dCellN) for each of the battery cells, calculates maximum inter-cell deviation corresponding to a maximum temperature difference between the battery cells by subtracting a minimum temperature difference (min (dCell1 to dCellN)) among the calculated maximum inter-cell temperature differences from a maximum temperature difference (max (dCell1 to dCellN)) among the calculated maximum inter-cell temperature differences, and calculates a maximum inter-cell deviation corresponding to a maximum temperature difference between the battery cells by subtracting the maximum inter-cell deviation from the maximum temperature difference (max (dCell1 to dCellN). And when the maximum inter-cell deviation is greater than a predetermined lower limit threshold temperature (Threshold low), performing temperature control or charging current control on a weak cell corresponding to the battery cell having the maximum temperature difference in a predetermined manner.

To provide a temperature distribution estimation device with which it is possible to improve accountability.SOLUTION: A temperature distribution estimation device 1 comprises: a multiple regression inference unit 11 which, designed to estimate the temperature distribution of a battery cell, enters input data 1a to a multiple regression expression obtained by a multiple regression analysis and estimates the maximum temperature and minimum temperature of the battery cell; a DNN inference unit 12 having been trained using a large number of temperature distribution images of the battery cell and capable of outputting the normalized value of temperature distribution of the battery cell; a temperature distribution calculation unit 13 for calculating the temperature distribution of the battery cell on the basis of the output of the multiple regression inference unit 11 and the output of the DNN inference unit 12; and a ground explanation unit 14 for determining an item whose degree of contribution to the estimation result of temperature distribution is high on the basis of the standard partial regression coefficient obtained by a multiple regression analysis, and configured to be capable of presenting the item whose degree of contribution is high to a user.SELECTED DRAWING: Figure 1