966 results about "Discharge current" patented technology

A battery heating system includes: a temperature monitoring circuit configured to output a temperature monitoring signal; a voltage conversion circuit configured to receive a first voltage that is input by a power supply or a second voltage that is input by a to-be-heated battery; and a control circuit configured to receive the temperature monitoring signal and output a control signal. The voltage conversion circuit is configured to perform boosting processing or bucking processing on the first voltage based on the control signal or perform boosting processing or bucking processing on the second voltage based on the control signal to enable the to-be-heated battery to receive a charging current from the power supply in a first time segment using the voltage conversion circuit and the to-be-heated battery to output a discharging current to the power supply in a second time segment using the voltage conversion circuit.

The invention belongs to the technical field of battery temperature control, and provides a blade battery temperature control method and system based on a fuzzy neural network, and the method comprises the following steps: monitoring the temperature of a battery cell and a phase change material in real time, monitoring the charging and discharging current of a battery in real time through a current transformer, and obtaining current data; preprocessing the battery cell temperature data, the phase change material temperature data and the current data to obtain preprocessed data; the preprocessed data serve as input variables and are input into a fuzzy neural network for fuzzy processing, and a temperature adjusting instruction is generated according to the preset working temperature range of the blade battery; according to the temperature adjusting instruction, the temperature of the blade battery is adjusted, and the temperature change is monitored in real time; through the complex mapping capability of the fuzzy neural network, accurate control over the battery temperature is achieved, temperature fluctuation is reduced, the consistency of battery performance is improved, and the temperature control performance of the blade battery is improved.

The invention discloses a battery rate adjusting method and system based on joint calculation, and the method comprises the steps: collecting real-time operation parameters of a battery, the real-time operation parameters comprising a real-time current, a real-time voltage observation value, a first electrochemical impedance spectrum, a first temperature stress and a first cycle index; obtaining an SOH value based on the first electrochemical impedance spectrum, the first cycle index and the first temperature stress; estimating based on the SOH value and the real-time current to obtain a first SOC value; correcting the first SOC value based on the real-time voltage observation value to obtain a second SOC value; and determining a first charge-discharge rate according to the SOH value and the second SOC value, and controlling the charge-discharge current of the battery according to the first charge-discharge rate. According to the method, the problems that SOC estimation is not accurate, SOH evaluation lacks dynamics, and rate control is single are solved, and intelligent and self-adaptive adjustment of charge and discharge rates of the battery in different operation states is achieved.

The invention discloses an electric energy discharge control device. The energy storage circuit is used for storing potential storage electric energy; the bleeder circuit is used for releasing the potential storage electric energy through a bleeder resistor and a bleeder transistor which are connected in series; the reference voltage setting circuit is used for outputting a reference voltage signal; the bleeder sampling feedback circuit is used for outputting a bleeder sampling feedback electric signal according to the bleeder sampling current of the bleeder resistor; the post-stage voltage feedback circuit is used for outputting a post-stage voltage feedback electric signal according to the potential storage voltage; and the conduction degree of the discharge transistor is controlled according to the post-stage voltage feedback electric signal, the reference voltage signal and the discharge current collection feedback electric signal. The conduction degree of the bleeder transistor is dynamically controlled according to the bleeder current collection feedback electric signal and the post-stage voltage feedback electric signal, so that the change of potential storage electric energy of the energy storage device is dynamically adapted, the bleeder power and the current of the bleeder circuit are stable and controllable, and a higher bleeder rate can be realized under the condition that the bleeder power and the current are kept unchanged.

The invention provides a hysteresis coefficient calibration method for a battery, and the method comprises the following steps: discharging the battery from a first initial charge state to a first target charge state through a plurality of unequal discharge currents, and measuring the open-circuit voltage, corresponding to the first target charge state, of the battery after standing for a preset period of time; the measured open-circuit voltage is compared with a reference open-circuit voltage determined according to a reference OCV-SOC corresponding relation to determine a hysteresis coefficient, and the hysteresis coefficient represents the deviation degree of the OCV-SOC corresponding relation of the battery relative to the reference OCV-SOC corresponding relation caused by the hysteresis effect; and determining a corresponding relationship between the discharge currents and the hysteresis coefficients based on the plurality of discharge currents and the corresponding hysteresis coefficients. The present application also proposes a state of charge determination method for a battery, a computer program product, an electronic device, and a vehicle. According to the invention, the state of charge of the battery can be determined more accurately.

The invention provides a storage battery starting capability prediction method and device, electronic equipment and a medium, and the method comprises the steps: obtaining the change data of the current and voltage of a storage battery when an engine is started this time; determining the moment corresponding to the maximum discharge current, the internal resistance of the starter at the moment and the internal resistance of the storage battery at the current increasing stage in the starting process of the engine based on the change data of the current and the voltage of the storage battery; and inputting the internal resistance of the storage battery and the internal resistance of the starter into a pre-constructed starting capability model to predict the starting voltage which can be provided by the storage battery when the engine is started next time. According to the invention, the prediction accuracy of the starting capability of the storage battery is improved.

A voltage-to-delay converter includes a first reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving a reset signal, and a second terminal coupled to a top plate of a first integrating capacitor, and a second reset transistor having a first terminal coupled to a power supply terminal, a gate terminal receiving the reset signal, and a second terminal coupled to a top plate of a second integrating capacitor. First and second input transistors receive first and second input voltages, and are coupled between the top plate of the first and second integrating capacitors, respectively, and a first current source. A discharge current source is coupled to bottom plates of the first and second integrating capacitors. A pulse generator has first and second inputs coupled to the top plate of the first and second integrating capacitors, respectively.

The invention discloses a high-voltage bidirectional silicon controlled rectifier electrostatic protection device and a manufacturing method. The high-voltage bidirectional silicon controlled rectifier electrostatic protection device comprises a P-type substrate, a P-type well and a high-voltage N well, the emitter P + injection of a parasitic PNP triode and the emitter N + injection of a parasitic NPN triode in the P-type well are arranged alternately, so that the length of a transverse discharge path of the silicon controlled rectifier is reduced to the greatest extent, the square resistance of a PNPN positive feedback conduction path is greatly reduced, and the key problem that a symmetrical bidirectional silicon controlled rectifier structure cannot be effectively opened in a high-voltage window of more than 70V is solved; in addition, the layout can provide an additional parasitic NPN triode path for a silicon controlled rectifier path, the effective area of an emitter of the parasitic NPN triode and the proportion of the emitter in a silicon controlled rectifier loop are increased, and the current discharge capacity of the device is further improved. Therefore, reference can be provided for the structural design of the high-voltage symmetrical bidirectional silicon controlled rectifier electrostatic protection device, and the silicon controlled rectifier can be effectively applied to ESD protection of a high-voltage bidirectional port.

The invention relates to a battery internal resistance consistency evaluation method and device, a vehicle and a storage medium. Comprising the following steps: acquiring a first voltage of each cell before discharging, a second voltage of each cell after discharging, a discharging current of a battery system, a third voltage of each cell before charging, a fourth voltage of each cell after charging and a charging current of the battery system in a target charge state, calculating the discharge internal resistance of each battery cell according to the first voltage, the second voltage and the discharge current, recording the maximum discharge internal resistance and the minimum discharge internal resistance, and further calculating the discharge internal resistance extreme value difference of each battery cell; calculating the charging internal resistance of each battery cell according to the third voltage, the fourth voltage and the charging current, recording the maximum charging internal resistance and the minimum charging internal resistance, further calculating the charging internal resistance extreme value difference of each battery cell, and when the discharging internal resistance extreme value difference is smaller than or equal to a discharging internal resistance target value and the charging internal resistance extreme value difference is smaller than or equal to a charging internal resistance target value, determining that the charging internal resistance value is smaller than or equal to the charging internal resistance target value. And judging that the battery system meets the internal resistance consistency evaluation.

Provided is a device for determining the feasibility of operation, based on an operation plan, of a storage battery, the device comprising: a simulation unit for simulating at least one of the state of charge, temperature, and charging / discharging current of the storage battery when a charging / discharging operation is performed in the storage battery according to the contents of the operation plan; a determination unit for determining the feasibility of operation of the storage battery according to the operation plan, using, as determination target indexes, a result of the simulation and a setting value of a charging / discharging output for each unit time segment described in the operation plan; and a modification unit capable of modifying the operation plan when it is determined that the operation is not feasible. When at least one of the determination target indexes does not fall within an allowable range, it is determined that the operation is infeasible, and the operation plan can be modified by adjusting the setting value of the charge / discharge output for each unit time segment in the operation plan determined to be infeasible. When the operation plan is modified, the operation feasibility is determined for the modified operation plan.

The invention provides a battery state prediction method and device, electronic equipment and a storage medium, and the method comprises the steps: obtaining the current state data of a to-be-detected battery, the state data at least comprising the following characteristics: terminal voltage, terminal discharge current and temperature; inputting the current state data into a pre-trained LSTM (Long Short Term Memory) and Transformer-based battery state prediction model to obtain the battery state of the to-be-tested battery predicted by the battery state prediction model; the battery state comprises at least one of a state of charge and a state of health; the battery state prediction model comprises a preprocessing layer, an LSTM layer, a Transform layer, a feature fusion layer and an output layer which are connected in sequence. Therefore, the state of charge and / or the state of health of the battery can be predicted, the prediction precision is high, the calculation efficiency is improved, and the calculation burden is reduced.

The invention relates to the technical field of high-voltage electrostatic parameter measurement and circuit detection and analysis, and discloses a lampblack purifier high-voltage field intensity detection circuit method based on electrical variable measurement, which comprises the following steps: acquiring a real-time discharge current and output voltage data sequence of a detected electrostatic field load; determining a dynamic electrical stiffness parameter according to the response gradient; extracting a direct current component of the current to determine a real-time leakage conductance parameter; establishing coupling characteristics of the electrical stiffness increment and the leakage conductivity change rate, and judging impedance boundary displacement when the characteristics are mismatched; calculating the virtual displacement of the surface of the polar plate by using the discrete curvature of the electrical stiffness evolution trajectory; according to the method, the field intensity dynamic compensation is realized by sensing the change of a charge migration path, and the calculation deviation caused by medium accumulation is eliminated.

The invention relates to the technical field of storage battery self-diagnosis evaluation and risk early warning, and particularly discloses an intelligent self-diagnosis evaluation and risk early warning method and system for a storage battery. Comprising the steps of diagnosis window signal generation, transient discharge state starting, current compensation instruction generation, stable compensation current formation, gain load adjustment, performance data packet generation, real-time safety monitoring and storage battery comprehensive health assessment. A transient discharge state is started after a stable load period is identified, actual discharge current is sampled at high frequency, dynamic stable compensation current is generated, discharge duration, a single voltage curve and a temperature change rate are synchronously acquired, a multi-dimensional performance data packet is generated, and a safety threshold value is compared in real time to trigger a diagnosis termination mechanism. And finally, by associating the actual discharge capacity with the voltage dispersion, the drop rate and the temperature rise amplitude, issuing an evaluation report containing a capacity conclusion and predictive risk early warning. Accurate assessment and risk pre-management and control of the health state of the storage battery are realized.

A battery is a swappable battery for driving an electrified vehicle. Charging of the battery is not started until a specific time (for example, elimination time, certain time) elapses from when the battery is connected to the charging device after being removed from the electrified vehicle. Thus, even when the battery is connected to the charging device after being removed from the electrified vehicle, the charging of the battery is not started until the specific time elapses. The specific time may be a time until high-rate degradation is eliminated. The high-rate degradation is a state in which the battery has an increased internal resistance due to an uneven lithium-ion concentration distribution in an electrolyte solution of the battery caused by charging or discharging including charging or discharging performed at a current value higher than a predetermined current value when the battery is connected to the electrified vehicle.

The invention provides a current test discharge method and system based on active discharge and segmented control, and the method comprises the steps: monitoring the voltage of an energy storage capacitor after the current test of a chip is completed; when the voltage is greater than a first threshold value, entering a constant-current discharge mode, and in the constant-current discharge mode, adjusting the grid voltage of the MOS tube according to the voltage value, and maintaining the discharge current to be a set value constantly; the voltage of the energy storage capacitor continues to be monitored, when the voltage is smaller than a first threshold value and larger than a second threshold value, an exponential decay mode is switched, and in the exponential decay mode, the voltage of the grid electrode of the MOS tube continues to be adjusted; when the voltage is smaller than the second threshold value, the MOS tube is closed, and the discharging process is completed. The technical problems of non-uniform energy release, large transient impact, long discharge time and the like existing in a traditional discharge mode are effectively solved through precise control of two stages of constant current discharge and exponential decay.

The invention relates to the technical field of hybrid electric vehicle energy management, in particular to a hybrid electric vehicle layered reinforcement learning energy management method considering energy source life and energy consumption optimization. The method comprises the following steps: establishing an energy management system model and an energy source degradation model; energy source physical characteristics are analyzed, demanded power is processed in a layered mode, and an energy management learning strategy based on historical data is constructed; and energy management is implemented by combining the demand power change, the lithium battery, the super capacitor SOC and the degeneration degree of the energy source. Fuzzy filtering is adopted to shunt required power, a high-frequency peak value is borne by a super capacitor, and low-and-medium-frequency power is proportionally distributed by a lithium battery and a fuel battery according to the degradation degree; energy source degradation and deep reinforcement learning are fused, related parameter weighting is introduced into the ECMS, and lithium battery charging and discharging current is restrained. According to the method, comprehensive energy consumption can be reduced, energy source degradation is slowed down, the working condition application range is widened, overcharge and overdischarge of the lithium battery are avoided, the service life of the lithium battery is prolonged, and the SOC of the energy storage element is stabilized in a reasonable interval.

The invention relates to the technical field of motor insulation state monitoring, and discloses a motor winding turn-to-turn discharge monitoring method and device based on Rogowski coils. The high-pass integrator is matched to carry out integral operation on coil output signals in a centralized mode to obtain high-frequency discharge current data, then fault characteristic quantity is constructed based on the data, the fault position of the motor cable is determined, an independent monitoring module does not need to be configured for each phase of cable, and the single high-pass integrator can complete centralized processing of multi-coil signals. Not only is the use amount of core monitoring parts greatly reduced to reduce the monitoring cost, but also the hardware layout is remarkably simplified to save the installation space, and meanwhile, the data processing nodes are reduced to reduce processor resource occupation, and the problems of high monitoring cost, large space and resource consumption and low monitoring efficiency in the prior art are effectively solved.

The invention provides an electrical equipment overheating hidden danger early warning method and system based on unmanned aerial vehicle multi-spectral imaging, and belongs to the technical field of power equipment state monitoring, and the method comprises the steps: firstly obtaining ultraviolet photons and spatial point cloud data collected by an unmanned aerial vehicle; a three-dimensional model is constructed based on the point cloud, and electric field distribution information is obtained through finite element analysis. And the photon data and the electric field information are combined, and the discharge charge quantity and distribution are obtained through space inversion correction. And calculating the discharge current density by using an energy dissipation model, and determining the discharge thermal power loss density in combination with the local electric field. And finally, a steady-state heat conduction equation is solved based on the heat conduction and dissipation parameters, temperature field distribution under heat balance is calculated, and early warning information is generated when the steady-state temperature exceeds a heat-resistant threshold value. According to the invention, early-stage accurate prediction and positioning of the hidden overheating fault of the electrical equipment caused by insulation degradation are realized.

The invention discloses a new energy automobile starting sodium ion battery protection system and method, and belongs to the technical field of battery management. Whether a battery is in an extreme starting risk state or not is judged by obtaining a basic response parameter set B under the current temperature and the residual electric quantity; if the risk exists, a voltage recovery curve family M of similar working conditions is extracted from historical data, a voltage prediction model W is constructed, and the lowest voltage point Vmin in the starting process is predicted; determining a safe discharge current limit value Ilimit according to the Vmin, and generating a dynamic current limiting strategy L; executing a current limiting strategy L to control starting current input; when it is detected that the voltage rises and exceeds a set recovery threshold value, the current limiting strategy is quitted, and normal current output is recovered; the method can effectively reduce the starting failure risk of the sodium ion battery under extreme working conditions of low temperature, low electric quantity and the like, and improves the system safety and the starting success rate.

The invention discloses a charging and discharging control method, energy storage equipment and a storage medium, and is applied to the technical field of energy control. The charging and discharging control method is applied to the energy storage equipment, the energy storage equipment comprises a main battery pack and at least one power-up pack which are connected in parallel, the charging and discharging control method comprises the steps that the charging current and the discharging current of the energy storage equipment are obtained, the charging current is the sum of the charging current of the main battery pack and the charging current of each power-up pack, and the discharging current is the sum of the charging current of each power-up pack; the discharge current comprises the sum of the discharge current of the main battery pack and the discharge current of each power-up pack; under the condition that the energy storage equipment is charged and discharged at the same time, total current is determined based on the charging current and the discharging current; determining a first charging and discharging mode based on the total current; and switching the current working mode of the energy storage equipment into the first charging and discharging mode. The working mode is determined through the charging current and the discharging current, the response speed can be increased, and the hardware cost is reduced.

The invention discloses a transformer station DC system storage battery pack on-load discharge capacity checking method and system, and relates to the technical field of storage battery discharge maintenance, and the method comprises the steps: carrying out the equalizing charging of a storage battery pack through an equalizing charging voltage, and collecting the internal resistance of a single storage battery before capacity checking; after capacity checking is started, an intelligent electronic load value is adjusted, so that the output current of the storage battery pack keeps a constant set value; when a test ending condition is met, obtaining nuclear capacity discharge capacity according to the discharge current and the discharge time of the storage battery pack; the storage battery pack is charged after charging is finished, the capacity checking charging capacity is obtained according to the charging current and the charging time, and the internal resistance of the single storage batteries after capacity checking is collected after charging is finished; and generating an on-load discharge capacity checking test table according to the internal resistance of the single storage battery before capacity checking, the capacity checking discharge capacity, the capacity checking charge capacity and the internal resistance of the single storage battery after capacity checking so as to complete capacity checking of the storage battery pack. Remote online capacity checking is realized, and the problem of low reliability of the whole group of storage batteries caused by virtual connection of storage battery connecting strips or performance reduction of a single storage battery is solved.

Electrical storage system with: an electrical storage device (10); a load (20); a line (PL) configured to connect the electrical storage device (10) and the load (20); a relay (SMR-G) that is provided in the line (PL); a capacitor (C11) which has one end connected to the electrical storage device (10) and the other end connected to a ground; a voltage sensor (21) configured to detect a voltage value of the capacitor (C11); a first insulation resistance (RB) which is set up between the electrical storage device (10) and the ground; a second insulation resistor (RL) which is installed between the load (20) and the ground; a first current path (L1) which includes the first insulation resistance (RB); a second current path (L2) comprising the conductor (PL) and the second insulation resistance (RL); and a control unit (50) that is configured to (a) Controlling ON and OFF of the relay (SMR-G), and (b) Determine that the relay (SMR-G) is blocked in an ON state if the voltage value is substantially equal to a second voltage value in a case where control to turn off the relay (SMR-G) is carried out, where a first resistance value is higher than a second resistance value, the second voltage value is higher than a first voltage value, the first resistance value is a resistance value of the first insulation resistance (RB), the second resistance value is a resistance value of the second insulation resistance (RL), the first voltage value is a voltage value when a discharge current of the electrical storage device (10) flows to the capacitor (C11) in the first current path (L1), the second voltage value is a voltage value when the discharge current of the electrical storage device (10) flows to the capacitor (C11) in the second current path (L2).

An example vehicle battery control system includes an electric motor, a vehicle battery pack configured to supply power to the electric motor, the vehicle battery pack including multiple battery modules each including multiple rechargeable battery cells, and a vehicle control module configured to measure an output current of the vehicle battery pack, estimate a state of charge of the vehicle battery pack using a coulomb counter, and for each of the multiple battery modules, measure an output voltage of the battery module, determine a state of charge shifting bias value for the battery module, estimate an individual state of charge of the battery module by applying the state of charge shifting bias value to the state of charge of the vehicle battery pack, and control at least one of a charging current and a discharging current according to the individual state of charge of the battery module.

The invention relates to the technical field of lithium battery safety, in particular to an electric tricycle lithium battery charging and discharging management method and system, and the method comprises the steps: obtaining lithium battery state data, environment data, tricycle load data and historical driving data; clustering analysis is carried out on the user driving data, and electro-tricycle scene types are divided; performing health degree evaluation on the battery state, automatically matching a charging mode according to the health degree, generating a charging current limiting value through a multi-objective optimization algorithm, performing dynamic matching on charging parameters, and executing charging operation according to the matched parameters; the scene type is recognized, a discharge current limiting value is generated through a multi-target optimization algorithm, discharge parameter dynamic matching is carried out, discharge operation is executed according to matched parameters, and energy recovery is started during downhill braking; and establishing a battery abnormal state identification model, and triggering graded early warning when an abnormal state is identified. Therefore, the problems of fixed charging and discharging modes, single abnormity monitoring, insufficient scene adaptation and the like in the prior art are solved.

The invention discloses a direct-current power supply capacity checking device and method based on grouping control, and relates to the technical field of storage batteries. The direct-current power supply capacity checking device comprises a parallel power supply module and a storage battery module composed of a plurality of storage battery modules; the data acquisition module is used for acquiring power supply information and switching value state information of the parallel power supply module; the charger module is used for charging the parallel power supply module; and the capacity checking control module is used for controlling the capacity checking operation of the parallel power supply module and outputting abnormal alarm information according to the information acquired by the data acquisition module. According to the invention, capacity checking is carried out on the storage battery module of the parallel power supply module, the capacity checking control module controls the storage battery module to start discharging from the first storage battery monomer, the discharging time and the discharging current of the storage battery monomer are monitored in sequence, the capacity checking process is that charging is carried out after discharging, the capacity checking time is saved, and the capacity checking efficiency is improved.

The invention relates to a battery equalization control method and system and a medium, and relates to the technical field of battery equalization. The method comprises the following steps: acquiring the capacity and electric quantity of each battery unit in the series battery pack in real time, and calculating the charging and / or discharging current of each battery unit based on the acquired capacity and electric quantity as the charging and / or discharging current corresponding to each battery unit. Compared with the prior art, the control precision of battery equalization can be improved, the equalization effect is improved, and the safety risk is reduced.

The utility model relates to an electrode assembly with discharge bulges and a water treatment device adopting the same. The electrode assembly comprises two electrode plates which are oppositely arranged, discharging protrusions are arranged on the surfaces of the discharging sides of the electrode plates, a gap is reserved between the discharging protrusion on any electrode plate and the other electrode plate, and the discharging sides of the discharging protrusions are of a mushroom head structure and are installed on the electrode plates in a detachable connection mode. The water treatment device is provided with a pretreatment tank or an electric flocculation tank, the electrode assembly is arranged in the pretreatment tank or the electric flocculation tank, outlet water of the pretreatment tank or the electric flocculation tank is connected into an aerobic tank, outlet water of the aerobic tank is connected into a secondary sedimentation tank, and outlet water of the secondary sedimentation tank is connected into a clean water tank. The electrode assembly provided by the utility model can reduce the discharge voltage requirement under the condition of keeping a relatively large discharge current, so that the preparation cost and the operation cost are further reduced, and scaling separation after positive and negative electrode guiding is facilitated.

The invention discloses a flow battery external characteristic prediction method and equipment. The method comprises the following steps: constructing an equivalent circuit model and a thermal model of an all-vanadium flow battery; calculating equivalent circuit parameters of the equivalent circuit model according to the initial electrolyte temperature and the initial vanadium ion concentration of each valence state; calculating battery output voltage and electric power at the current moment according to the equivalent circuit parameters and the charging and discharging current; inputting the environment temperature and the electric power at the current moment and the pump power of the circulating pump into a thermal model, and solving the temperature of the galvanic pile electrolyte at the next moment; inputting the stack electrolyte temperature at the next moment into the dynamic differential equation of the vanadium ion concentration to obtain the vanadium ion concentration at the next moment; the electrolyte temperature and the vanadium ion concentration at the next moment are fed back to the equivalent circuit model, loop iteration is conducted till the battery charging and discharging process reaches a steady state, and the output voltage and the stack electrolyte temperature of the flow battery at each moment in the charging and discharging process are obtained. The computing resources are reduced, and the prediction accuracy is improved.

The invention discloses a high-power multi-channel independent delay detonation control system which comprises a main controller, the main controller is connected with an integrated cabinet, a battery pack module, an inverter module and a rectifier module are arranged in the integrated cabinet, and a controller module, the battery pack module, the inverter module, the rectifier module and the controller module are connected in sequence; a heat dissipation system is arranged in the integrated cabinet, and the controller module is connected with an ignition device in the blast hole. The invention further discloses a high-power multi-channel independent delay detonating control method, the problems that existing detonating equipment is short in discharging time, small in discharging current, low in discharging power and few in output channel are solved, and the high-power multi-channel independent delay detonating control method can be widely applied to bursting balloons and detonating fireworks and crackers. And the device can also be used as detonating equipment for an explosive blasting technology, a carbon dioxide blasting technology and a liquid oxygen rock breaking technology.

This invention provides a method for accurately estimating the internal temperature of a secondary battery while considering the state of charge (SOC) and charge / discharge state. The method is a method (80) for estimating the internal temperature (T) of a vehicle secondary battery (1), comprising a repeatedly executed change determination process (50) and a repeatedly executed internal temperature estimation process (60, 60'). The change determination process includes: (54) a step of determining a first change (21) in the internal resistance (R) relative to the charge rate (SOC) based on the voltage (V) and charge / discharge current (I) of the secondary battery when the vehicle is stationary or at the start of driving; and (22) a step of determining a second change (22) in the internal resistance relative to the charge rate based on the voltage and charge / discharge current during vehicle operation. Step (57) of the internal temperature estimation process includes: measuring the external temperature (To) of the secondary battery (62); measuring the charge and discharge current (63); calculating the charge rate (64); determining whether the secondary battery is discharging (66); selecting a first change when discharging (67); selecting a second change when not discharging (68); calculating the internal resistance based on the selected change and the calculated charge rate (69); and estimating the internal temperature based on the external temperature, charge and discharge current, and internal resistance (70).