A safety control method, device and equipment of an outdoor energy storage power supply and a medium

Abstract

The application relates to the technical field of power management, in particular to a safety control method and device of an outdoor energy storage power supply, equipment and a medium. The application determines the current working state of the power supply through the power supply working parameters of the outdoor energy storage power supply, then acquires the current working power under the condition that the current working state is normal, then combines the environmental data collected by the environmental sensor in real time, the technical specifications of the power supply, predicts the reference internal temperature variation of the outdoor energy storage power supply in a preset time period, acquires the actual internal temperature variation of the outdoor energy storage power supply in the preset time period, controls the outdoor energy storage power supply to enter the working state corresponding to the comparison result according to the comparison result of the actual internal temperature variation and the reference internal temperature variation, and when the actual internal temperature variation is abnormal, the system can automatically adjust the working state, thereby reducing the situation that the battery is out of control and catches fire due to temperature abnormality, and playing a role in protecting the power supply and preventing fire.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of power management, in particular to a safety control method, device and equipment of an outdoor energy storage power supply and a medium. BACKGROUND

[0002] Outdoor energy storage power supplies are widely used in outdoor activities, and users can use outdoor energy storage power supplies to power various devices (such as lighting devices, mobile devices, cooking devices, etc.). In the complex outdoor environment, for example, when the light intensity is too high, the power supply is physically collided, etc., it may cause the power supply to be out of control, not only reducing the performance of the power supply, but also damaging the devices around the power supply, and even causing a fire, which is particularly dangerous in the environment of camping in the wild. The existing method manages the battery power through the battery management system after detecting that the temperature rises to the preset temperature threshold, which has a certain hysteresis, and this situation needs to be further improved. SUMMARY

[0003] In order to solve the problem of hysteresis of the existing battery management system, the present application provides a safety control method, device and equipment of an outdoor energy storage power supply and a medium, which adopts the following technical solution:

[0004] In the first aspect, the present application provides a safety control method of an outdoor energy storage power supply, comprising the following steps:

[0005] Obtain the power supply working parameters of the outdoor energy storage power supply, and determine the current working state of the outdoor energy storage power supply according to the power supply working parameters;

[0006] In the case where it is determined that the current working state is normal, obtain the current working power of the outdoor energy storage power supply;

[0007] Obtain the environmental data of the environment around the outdoor energy storage power supply collected by the environmental sensor in real time;

[0008] According to the current working power, the technical specifications of the outdoor energy storage power supply and the environmental data, predict the reference internal temperature change amount of the outdoor energy storage power supply in a preset time period;

[0009] Obtain the actual internal temperature change amount of the outdoor energy storage power supply in the preset time period;

[0010] According to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount, control the outdoor energy storage power supply to enter the working state corresponding to the comparison result.

[0011] By adopting the technical scheme, the current working state of the outdoor energy storage power supply is determined according to the power supply working parameters of the outdoor energy storage power supply, then the current working power is acquired in the case that the current working state is normal, and then the reference internal temperature variation of the outdoor energy storage power supply in a preset time period is predicted in combination with the environment data acquired by the environment sensor in real time, the actual internal temperature variation of the outdoor energy storage power supply in the preset time period is acquired, the working state of the outdoor energy storage power supply is controlled to enter the working state corresponding to the comparison result according to the comparison result of the actual internal temperature variation and the reference internal temperature variation, and when the actual internal temperature variation is abnormal, the system can automatically adjust the working state, thereby reducing the situation that the battery thermal runaway and fire are caused by temperature abnormality, and playing the roles of protecting the power supply and preventing fire.

[0012] Optionally, the environment data comprises environment temperature, environment humidity and airflow speed, and the reference internal temperature variation of the outdoor energy storage power supply in the preset time period is predicted according to the current working power, the technical specification of the outdoor energy storage power supply and the environment data, comprising the following steps:

[0013] The technical specification of the outdoor energy storage power supply is acquired.

[0014] The internal temperature rise change rate of the outdoor energy storage power supply in a preset time period is detected, wherein the preset time period is less than the preset time period.

[0015] The reference internal temperature variation is predicted according to the current working power, the technical specification, the environment temperature, the environment humidity, the airflow speed, the temperature rise change rate and a random disturbance parameter.

[0016] By adopting the technical scheme, the environment temperature, the environment humidity and the airflow speed acquired by the environment sensor are acquired, then the technical specification of the outdoor energy storage power supply is acquired, the temperature rise change rate in a preset time period is detected, and the internal temperature variation in a preset time period is more accurately predicted through the current working power, the technical specification, the environment temperature, the environment humidity, the airflow speed, the temperature rise change rate and a random disturbance parameter.

[0017] Optionally, the current operating power includes the input power of the outdoor energy storage power supply during photovoltaic power generation and the output power of the outdoor energy storage power supply when supplying power to electrical equipment. The technical specifications include the input efficiency of the outdoor energy storage power supply for photovoltaic power generation, the output efficiency of the outdoor energy storage power supply to electrical equipment, the mass of the outdoor energy storage power supply, the surface area of ​​the outdoor energy storage power supply, the heat capacity of the outdoor energy storage power supply material, and the heat dissipation efficiency of the outdoor energy storage material. The predicting of the reference internal temperature change based on the current operating power, the technical specifications, the ambient temperature, the ambient humidity, the air flow velocity, the temperature rise rate, and the random disturbance parameter specifically includes:

[0018] Calculating the heat generated by the outdoor energy storage power supply when performing photovoltaic power generation according to the input efficiency, the preset time period, and the input power;

[0019] Calculating the heat generated by the outdoor energy storage power supply when supplying power to the electrical equipment based on the output efficiency, the preset time period, and the output power;

[0020] Calculating the amount of heat exchanged between the environment and the outdoor energy storage power supply based on the heat dissipation efficiency, the airflow velocity, the convection heat transfer coefficient, the surface area, the ambient temperature, and the initial temperature of the outdoor energy storage power supply, wherein the convection heat transfer system is determined based on the ambient temperature, the ambient humidity, and the airflow velocity;

[0021] Calculating the heat generated by the random disturbance according to the random disturbance parameter, the mass, and the heat capacity;

[0022] Calculating a first internal temperature change based on the heat generated by the outdoor energy storage power supply when performing photovoltaic power generation, the heat generated by the outdoor energy storage power supply when supplying power to an electrical device, the heat exchange amount between the environment and the outdoor energy storage power supply, and the heat generated by the random disturbance;

[0023] Calculating a second internal temperature change amount according to the temperature rise change rate and the preset time period;

[0024] The reference internal temperature variation is determined according to the first internal temperature variation and the second internal temperature variation.

[0025] By adopting the above technical solution, the present application calculates the first internal temperature change based on the heat generated by the outdoor energy storage power supply when performing photovoltaic power generation, the heat generated when the outdoor energy storage power supply supplies power to electrical equipment, the heat exchange amount between the environment and the outdoor energy storage power supply, and the heat generated due to random disturbances, and then calculates the second internal temperature change based on the temperature rise change rate and the preset time period, and finally determines the reference internal temperature change, thereby accurately predicting the internal temperature change within the future preset time period.

[0026] Optionally, the controlling the outdoor energy storage power supply to enter a working state corresponding to the comparison result according to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount comprises the following steps:

[0027] When the temperature change directions of the actual internal temperature change amount and the reference internal temperature change amount are the same, obtaining a proportional size of the actual internal temperature change amount and the reference internal temperature change amount;

[0028] determining a safety factor level of the working state according to the proportional size, and controlling the outdoor energy storage power supply to enter a working state corresponding to the comparison result according to the safety level of the working state, wherein the working state comprises a normal state, a self-checking state, a slow charging and slow discharging state, a standby state, and a shutdown state, the safety factor levels of the normal state, the self-checking state, the slow charging and slow discharging state, the standby state, and the shutdown state are sequentially increased, and the greater the difference between the proportional size and 1 is, the higher the safety factor level of the corresponding working state is.

[0029] By adopting the above technical solution, the safety factor level is determined according to the proportional size of the actual internal temperature change amount and the reference internal temperature change amount, and the working state is determined according to the safety factor level, so that the normal operation of the power supply is maximally ensured in the case of ensuring the safety of the power supply.

[0030] Optionally, after the environment temperature, the environment humidity, and the airflow speed collected by the environment sensor are obtained, the method further comprises the following steps:

[0031] When the environment temperature exceeds a preset environment temperature threshold, calculating a difference value between the environment temperature and the preset environment temperature threshold;

[0032] determining a magnitude value of reducing the current working power according to the difference value, and updating the current working power according to the magnitude value.

[0033] By adopting the above technical solution, when the environment temperature exceeds the preset environment temperature threshold, the magnitude value of reducing the current working power is determined according to the difference value between the environment temperature and the preset environment temperature threshold, and the current working power is updated according to the magnitude value, so that the heat amount in the charging and discharging process is reduced, the working state of the power supply can be dynamically adjusted according to the environment condition, and the adaptability and safety of the system are improved.

[0034] Optionally, after the current working power of the outdoor energy storage power supply is obtained, the method further comprises the following steps:

[0035] comparing the current input power and the current output power of the current working state;

[0036] determining whether the outdoor energy storage power supply enters an overcharge state when the current input power is greater than the current output power;

[0037] decreasing the collection efficiency of input power when it is determined that the outdoor energy storage power supply enters an overcharge state;

[0038] determining the remaining discharge capacity of the outdoor energy storage power supply when the current output power is greater than the current input power;

[0039] increasing the collection efficiency of input power and decreasing output power when the remaining discharge capacity is lower than a preset minimum capacity.

[0040] By adopting the above technical solutions, the outdoor energy storage power supply is prone to overcharge and overdischarge. Overcharge can cause a large amount of heat and gas to be generated inside the battery, resulting in battery expansion, cracking, heat runaway and short circuit triggering. Overdischarge can reduce the battery voltage to near zero volts, damage the internal structure stability of the battery, cause internal short circuit, and short circuit large current can also generate high temperature and fire. In addition, overcharge and overdischarge can also cause electrolyte gasification and breakthrough of the safety valve, and the electrolyte gas can ignite when it meets air. Therefore, the application decreases the collection efficiency of input power when the power supply enters an overcharge state, and increases the collection efficiency of input power and decreases output power when the remaining discharge capacity of the power supply is lower than a preset minimum capacity, thereby avoiding the occurrence of continuous overcharge and overdischarge.

[0041] Optionally, the determination of whether the outdoor energy storage power supply enters an overcharge state comprises the following steps:

[0042] real-time monitoring of the terminal voltage of the outdoor energy storage power supply, and preliminary determination that the outdoor energy storage power supply enters an overcharge state when the terminal voltage is greater than a preset overcharge voltage threshold;

[0043] determination of whether the power supply operating parameter exceeds the operating parameter threshold in the input-output operating state;

[0044] final determination that the outdoor energy storage power supply enters an overcharge state when it is determined that the power supply operating parameter exceeds the operating parameter threshold.

[0045] By adopting the above technical solutions, the application preliminarily determines that the outdoor energy storage power supply enters an overcharge state when the terminal voltage is greater than a preset overcharge voltage threshold by monitoring the terminal voltage of the outdoor energy storage power supply, and further determines in combination with the power supply operating parameter to prevent false judgment caused by terminal voltage sampling distortion.

[0046] In a second aspect, the application provides a safety control device for an outdoor energy storage power supply, comprising:

[0047] The current working state acquisition module is configured to acquire power working parameters of the outdoor energy storage power supply, and determine a current working state of the outdoor energy storage power supply according to the power working parameters.

[0048] The current working power acquisition module is configured to acquire a current working power of the outdoor energy storage power supply when the current working state is determined to be normal.

[0049] The environmental data acquisition module is configured to acquire environmental data of an environment surrounding the outdoor energy storage power supply, which is collected by an environmental sensor in real time.

[0050] The reference internal temperature change amount prediction module is configured to predict a reference internal temperature change amount of the outdoor energy storage power supply in a preset time period according to the current working power, technical specifications of the outdoor energy storage power supply, and the environmental data.

[0051] The actual internal temperature change amount acquisition module is configured to acquire an actual internal temperature change amount of the outdoor energy storage power supply in the preset time period.

[0052] The control module is configured to control the outdoor energy storage power supply to enter a working state corresponding to a comparison result of the actual internal temperature change amount and the reference internal temperature change amount.

[0053] In a third aspect, the present application provides an electronic device, which comprises a memory, a processor, and a computer program stored in the memory and executable on the processor, and the processor implements the steps of the safety control method of the outdoor energy storage power supply when executing the computer program.

[0054] In a fourth aspect, the present application provides a computer readable storage medium, which stores a computer program, and the computer program implements the steps of the safety control method of the outdoor energy storage power supply when executed by a processor.

[0055] In summary, the present application has at least one of the following beneficial technical effects:

[0056] The present application determines the current working state of the power supply through the power working parameters of the outdoor energy storage power supply, and then acquires the current working power when the current working state is normal. Then, the reference internal temperature change amount of the outdoor energy storage power supply in a preset time period is predicted in combination with the environmental data collected by the environmental sensor in real time, the technical specifications of the power supply, and the actual internal temperature change amount of the outdoor energy storage power supply in the preset time period is acquired. According to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount, the outdoor energy storage power supply is controlled to enter a working state corresponding to the comparison result. When the actual internal temperature change amount is abnormal, the system can automatically adjust the working state, thereby reducing the situation that the battery thermal runaway and fire are caused by temperature abnormality, and playing a role in protecting the power supply and preventing fire.

[0057] The application obtains the ambient temperature, ambient humidity and airflow speed collected by the environment sensor, then obtains the technical specifications of the outdoor energy storage power supply, detects the temperature rise rate in a preset time period, and more accurately predicts the internal temperature change amount in a preset time period through the current working power, technical specifications, ambient temperature, ambient humidity, airflow speed, temperature rise rate and random disturbance parameter.

[0058] When the ambient temperature exceeds the preset ambient temperature threshold, the application determines the amplitude value of reducing the current working power according to the difference between the ambient temperature and the preset ambient temperature threshold, and updates the current working power according to the amplitude value, thereby reducing the heat generation in the charging and discharging process, so that the system can dynamically adjust the working state of the power supply according to the environmental conditions, and improve the adaptability and safety of the system. BRIEF DESCRIPTION OF DRAWINGS

[0059] Figure 1 is an exemplary flowchart of a safety control method of an outdoor energy storage power supply according to an embodiment of the application;

[0060] Figure 2 is an exemplary flowchart of predicting a reference internal temperature change amount according to an embodiment of the application;

[0061] Figure 3 is an exemplary flowchart of adjusting the power in the overcharge and overdischarge states according to an embodiment of the application;

[0062] Figure 4 is a module schematic diagram of a safety control device of an outdoor energy storage power supply according to an embodiment of the application;

[0063] Figure 5 is an internal structure diagram of an electronic device according to an embodiment of the application. EMBODIMENTS

[0064] The terms used in the following embodiments of the application are only for the purpose of describing specific embodiments and are not intended to be limiting to the application. As used in the specification and the appended claims of the application, the singular forms "a," "an" and "the" are intended to include both singular and plural forms, unless the context clearly indicates otherwise. It will be further understood that the terms "and / or" used in the application means any or all possible combinations of one or more of the listed items.

[0065] The terms "first", "second", "third", etc. are used only for the purpose of description and are not to be interpreted as implying relative importance or a specific number of technical features indicated. Thus, features defined with "first", "second" can explicitly or implicitly include one or more of the features, and in the description of the embodiments of the present application, the meaning of "a plurality of" is two or more, unless otherwise specified.

[0066] Outdoor energy storage power supply often encounters problems such as too high light intensity and physical collision due to the use in complex outdoor environment, which may cause the power supply to be out of control, not only reducing the performance of the power supply, but also damaging the equipment around the power supply, and even causing a fire. The traditional method is to manage the battery through the battery management system after detecting that the temperature rises to the preset temperature threshold, which has a certain hysteresis and cannot guarantee the safety of the outdoor energy storage power supply.

[0067] The present application provides a safety control method, device and equipment of an outdoor energy storage power supply and a medium, which acquires the current working power, then combines the environmental data collected by the environmental sensor in real time to predict the reference internal temperature change of the outdoor energy storage power supply in a preset time period, and then controls the outdoor energy storage power supply to enter a working state corresponding to the comparison result according to the comparison result of the actual internal temperature change and the reference internal temperature change. When the actual internal temperature change is abnormal, the system can automatically adjust the working state, thereby reducing the occurrence of battery thermal runaway and fire caused by temperature abnormalities, and playing a role in protecting the power supply and preventing fire.

[0068] The embodiments of the present application will be further described in detail below with reference to the accompanying drawings.

[0069] The present application provides a method executed by an electronic device, which can be a server or a terminal device. The server can be a standalone physical server, a server cluster composed of multiple physical servers, or a distributed system, or a cloud server providing cloud computing services. In this embodiment, the terminal device is an electronic device, but it is not limited to this and can also be a smart tablet, computer, etc. The terminal device and the server can be directly or indirectly connected through wired or wireless communication, which is not limited in the present application.

[0070] Reference Figure 1 , Figure 1 is an exemplary flowchart of a safety control method of an outdoor energy storage power supply according to an embodiment of the present application.

[0071] A safety control method of an outdoor energy storage power supply includes the following steps:

[0072] S110, acquire the power supply working parameter of the outdoor energy storage power supply, and determine the current working state of the outdoor energy storage power supply according to the power supply working parameter.

[0073] The working parameter of the power supply includes input power, output power, voltage, current, etc. of the power supply. It can be collected by a built-in sensor or an external collection device.

[0074] Specifically, according to the power supply working parameter, the current working state of the power supply can be determined, such as normal working, overcharging, over discharging, standby, etc.

[0075] S120, acquire the current working power of the outdoor energy storage power supply in the case of determining that the current working state is normal.

[0076] The current working power of the power supply is equal to the product of the voltage and the current.

[0077] S130, acquire the environmental data of the environment around the outdoor energy storage power supply collected by the environmental sensor in real time.

[0078] The environmental sensor includes a temperature sensor, a humidity sensor and an air flow speed sensor, which are used to acquire the environmental temperature, the environmental humidity and the air flow speed of the outdoor environment where the outdoor energy storage power supply is located. The environmental sensor is connected with the power management system through wired or wireless mode to transmit the signals collected by the sensor.

[0079] Specifically, the temperature sensor can be one or more of a thermocouple, a thermal resistance and a semiconductor sensor, and the humidity sensor can be one or more of a capacitive humidity sensor and a resistive humidity sensor. The number of sensors is not limited here.

[0080] S140, predict the reference internal temperature change amount of the outdoor energy storage power supply in a preset time period according to the current working power, the technical specifications of the outdoor energy storage power supply and the environmental data.

[0081] The current working power is calculated by the voltage and the current of the power supply, the environmental data includes the environmental temperature, the environmental humidity and the air flow speed, and the technical specifications of the outdoor energy storage power supply include the input efficiency when the outdoor energy storage power supply receives photovoltaic power generation input, the output efficiency when the outdoor energy storage power supply outputs energy to the power consumption device, the mass of the outdoor energy storage power supply, the surface area of the outdoor energy storage power supply, the heat capacity of the material of the outdoor energy storage power supply, the heat dissipation efficiency of the material of the outdoor energy storage power supply, etc.

[0082] Specifically, refer to Figure 2 , Figure 2 An exemplary flow chart for predicting the reference internal temperature change amount of the embodiment of the present application, step S140 includes the following steps:

[0083] S141, acquire the technical specifications of the outdoor energy storage power supply.

[0084] S142, detect the temperature rise change rate within a preset time period.

[0085] The preset time period is less than the preset time period, and the temperature rise change rate refers to the internal temperature rise change rate of the outdoor energy storage power supply within the preset time period.

[0086] S143, according to the current working power, technical specifications, environmental temperature, environmental humidity, air flow speed, temperature rise change rate and random disturbance parameter, predict the reference internal temperature change amount.

[0087] Specifically, the heat generated by the power supply when performing photovoltaic power generation is calculated according to the formula Q_in=P_in*(1-eff_in)*Δt, wherein Q_in represents the heat generated by the power supply when performing photovoltaic power generation, P_in represents the input power of photovoltaic power generation, eff_in represents the input efficiency of photovoltaic power generation, and Δt represents the considered preset time period.

[0088] The heat generated by the power supply when outputting to the electrical equipment is calculated according to the formula Q_out=P_out*(1-eff_out)*Δt, wherein Q_out represents the heat generated by the power supply when outputting to the electrical equipment, P_out represents the output power to the electrical equipment, and eff_out represents the output efficiency to the electrical equipment.

[0089] The heat exchange between the environment and the power supply is calculated according to the formula Q_env=eff_d*v*h*A*(T_env-T_initial)*Δt, wherein eff_d represents the heat dissipation efficiency, v represents the air flow speed, h represents the convective heat transfer coefficient, A represents the surface area of the energy storage power supply, T_env represents the environmental temperature, and T_initial represents the initial temperature of the energy storage power supply. The convective heat transfer coefficient h is determined according to the environmental temperature, environmental humidity and air flow speed.

[0090] The heat generated by random disturbance is calculated according to the formula Q_random=ΔT_random*m*c, wherein ΔT_random represents the random disturbance parameter, m represents the mass of the energy storage power supply, and c represents the heat capacity of the energy storage power supply. Random disturbance is a factor that is difficult to apply in the model but will affect temperature change, for example, uneven heat conduction inside the power supply, rapid change of environmental conditions, rapid change of power supply working state, etc. In practice, we usually cannot accurately know the influence of all these factors, so a random variable is used to simulate these influences, and the specific value of the random variable is determined according to experimental data and historical data.

[0091] The first internal temperature change amount in the preset time period is predicted according to a formula ΔT1=(Q_in+Q_out+Q_env+Q_random) / (m*c), wherein the heat generated by synthesizing the input and output power of the outdoor energy storage power supply, the heat exchange of the environment to the temperature and the heat generated by random disturbance are integrated, and then divided by the mass and the specific heat capacity of the power supply, and finally the temperature change in the power supply is obtained.

[0092] Then, the temperature rise change rate in the preset time period is calculated according to a formula dT / dt=(T2-T1) / (t2-t1), the second internal temperature change amount ΔT2=dT / dt*Δt is calculated according to the temperature rise change rate, wherein t2-t1 is the preset time period, T2-T1 is the temperature change in the preset time period, and the reference internal temperature change amount is determined according to the second internal temperature change amount and the second internal temperature change amount, wherein when the error between ΔT1 and ΔT2 is less than a preset error, ΔT1 and ΔT2 are determined as the reference internal temperature change amount, and when the error between ΔT1 and ΔT2 is greater than the preset error, ΔT1 is determined as the reference internal temperature change amount, so that the dynamic influence of the temperature change is considered, and the reference internal temperature change amount is more accurately calculated.

[0093] S150, acquiring the actual internal temperature change amount of the outdoor energy storage power supply in the preset time period.

[0094] The actual internal temperature change amount of the outdoor energy storage power supply in the preset time period is acquired by the temperature sensor arranged in the outdoor energy storage power supply, so that the reference internal temperature change amount can be compared.

[0095] S160, controlling the outdoor energy storage power supply to enter a working state corresponding to the comparison result according to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount.

[0096] When the actual internal temperature change amount is significantly different from the predicted reference internal temperature change amount, the working state needs to be switched, so that the outdoor energy storage power supply works in a working mode with a higher safety factor.

[0097] Specifically, S160 includes the following steps:

[0098] S161, acquiring the proportion of the actual internal temperature change amount and the reference internal temperature change amount.

[0099] The proportional relationship of the actual internal temperature change amount and the reference internal temperature change amount can well reflect the deviation of the actual internal temperature change and the predicted temperature change.

[0100] S162, determine the safety factor level of the working state according to the proportion size, control the outdoor energy storage power supply to enter the working state corresponding to the comparison result according to the safety level of the working state.

[0101] The working state includes a normal state, a self-checking state, a slow charging and slow discharging state, a standby state, and a shutdown state, and the safety factors of the normal state, the self-checking state, the slow charging and slow discharging state, the standby state, and the shutdown state increase in turn.

[0102] The normal state is a state in which the outdoor energy storage power supply normally works, the self-checking state is a state in which the outdoor energy storage power supply performs a detection operation, the slow charging and slow discharging state is a state in which the outdoor energy storage power supply performs a low-power operation, the standby state is a state in which a standby operation is performed, and the shutdown state is a state in which the power supply is completely turned off.

[0103] Specifically, the outdoor energy storage device performs different operations in various states, for example, in the self-checking state, one or more of system fault detection, hardware detection, state period counting, and state message sending operations are performed, which are not detailed here.

[0104] It is worth noting that before obtaining the proportion of the actual internal temperature change amount and the reference internal temperature change amount, it is necessary to determine the temperature change direction of the actual internal temperature change amount and the reference internal temperature change amount. When the temperature change directions of the actual internal temperature change amount and the reference internal temperature change amount are the same, the deviation is determined according to the proportion size. When the temperature change directions of the actual internal temperature change amount and the reference internal temperature change amount are opposite, the temperature change difference value of the actual internal temperature change amount and the reference internal temperature change amount is obtained, the deviation of the actual internal temperature change and the predicted temperature change is determined according to the temperature change difference value size, and the safety factor level of the working state is determined according to the deviation size.

[0105] The implementation principle of the safety control method of the outdoor energy storage power supply in the embodiment of the application is that the current working state of the power supply is determined through the power supply working parameters of the outdoor energy storage power supply, then the current working power is obtained under the condition that the current working state is normal, and then the reference internal temperature change amount of the outdoor energy storage power supply in a preset time period is predicted in combination with the environmental data collected by the environmental sensor in real time and the technical specifications of the power supply. According to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount, the outdoor energy storage power supply is controlled to enter the working state corresponding to the comparison result. When the actual internal temperature change amount is abnormal, the system can automatically adjust the working state, thereby reducing the situation that the battery thermal runaway and fire are caused by temperature abnormalities, playing a role in protecting the power supply and preventing fire.

[0106] In some embodiments, before step S141, the method further comprises the following steps:

[0107] S210, when the ambient temperature exceeds the preset ambient temperature threshold, calculating a difference between the ambient temperature and the preset ambient temperature threshold.

[0108] When the ambient temperature exceeds the preset ambient temperature threshold, the outdoor energy storage power supply works in a high-temperature environment, so it is not necessary to detect temperature changes, and the working power of the power supply can be directly reduced to improve safety.

[0109] S220, determining a magnitude value of reducing the current working power according to the difference, and updating the current working power according to the magnitude value.

[0110] Specifically, by determining the difference between the ambient temperature and the preset ambient temperature, the magnitude value of reducing the current working power is determined according to the difference, so that the current working power can be updated more accurately.

[0111] In some embodiments, with reference to Figure 3 , Figure 3 is an exemplary flowchart of the embodiment of the present application for adjusting power in overcharge and overdischarge states, after step S120, the method further comprises the following steps:

[0112] S310, comparing the current input power and the current output power in the current working state.

[0113] Specifically, when the outdoor energy storage power supply supplies power to the electrical equipment and does not perform photovoltaic power generation, the current output power is high and the current input power is 0; when the outdoor energy storage power supply performs photovoltaic power generation and does not supply power to the electrical equipment, the current input power is high and the current output power is 0; when the outdoor energy storage power supply simultaneously performs photovoltaic power generation and supplies power to the electrical equipment, both the current input power and the current output power are high.

[0114] S320, when the current input power is greater than the current output power, determining whether the outdoor energy storage power supply enters an overcharge state.

[0115] When the current input power of the outdoor energy storage power supply is high, the battery may be overcharged, which will cause a large amount of heat and gas to be generated inside the battery, resulting in battery swelling, cracking, triggering thermal runaway and short circuit.

[0116] S330, when it is determined that the outdoor energy storage power supply enters an overcharge state, reducing the collection efficiency of the input power.

[0117] Therefore, by reducing the collection efficiency of the input power, the safety of the outdoor energy storage power supply is improved. Reducing the collection efficiency of the input power includes changing the angle or direction of the photovoltaic panel, reducing the maximum charging current and the maximum charging voltage, and the like.

[0118] S340, determining the remaining discharge capacity of the outdoor energy storage power supply when the current output power is greater than the current input power.

[0119] Wherein, when the current input power of the outdoor energy storage power supply is high, the battery may be over-discharged, which will reduce the battery voltage to close to 0 volts, destroy the internal structure stability of the battery, cause internal short circuit, and short circuit large current will also produce high temperature fire, and overcharge and overdischarge will also make the electrolyte gasify, break through the safety valve, and the electrolyte gas may ignite the fire, which are all situations that are easy to cause fire.

[0120] S350, when the remaining discharge capacity is lower than the preset minimum capacity, increasing the collection efficiency of the input power and reducing the output power.

[0121] In some embodiments, step S330 includes the following steps:

[0122] S331, real-time monitoring the terminal voltage of the outdoor energy storage power supply, and preliminarily determining that the outdoor energy storage power supply enters an overcharge state when the terminal voltage is greater than a preset overcharge voltage threshold.

[0123] S332, determining whether the power supply operating parameter exceeds the operating parameter threshold in the input-output operating state.

[0124] S333, further determining that the outdoor energy storage power supply enters an overcharge state when the power supply operating parameter exceeds the operating parameter threshold.

[0125] Wherein, when the terminal voltage is greater than the preset overcharge voltage threshold, it is preliminarily determined that the outdoor energy storage power supply enters an overcharge state, however, in order to prevent misjudgment caused by distortion of the terminal voltage sampling, the application further determines in combination with the power supply operating parameter, thereby ensuring the accuracy of the judgment.

[0126] In a second aspect, the application provides a safety control device for an outdoor energy storage power supply. The safety control device for the outdoor energy storage power supply will be described below in combination with the safety control method for the outdoor energy storage power supply. Figure 4 , Figure 4 is a module schematic diagram of a safety control device for an outdoor energy storage power supply according to an embodiment of the application.

[0127] A safety control device for an outdoor energy storage power supply, comprising:

[0128] A current operating state acquisition module 410 is configured to acquire a power supply operating parameter of the outdoor energy storage power supply, and determine a current operating state of the outdoor energy storage power supply according to the power supply operating parameter.

[0129] A current operating power acquisition module 420 is configured to acquire a current operating power of the outdoor energy storage power supply when the current operating state is determined to be normal.

[0130] The environmental data acquisition module 430 is configured to acquire environmental data of an environment surrounding the outdoor energy storage power supply, which is collected by an environmental sensor in real time.

[0131] The reference internal temperature change amount prediction module 440 is configured to predict a reference internal temperature change amount of the outdoor energy storage power supply in a preset time period according to the current working power, the technical specifications of the outdoor energy storage power supply and the environmental data.

[0132] The actual internal temperature change amount acquisition module 450 is configured to acquire an actual internal temperature change amount of the outdoor energy storage power supply in the preset time period.

[0133] The control module 460 is configured to control the outdoor energy storage power supply to enter a working state corresponding to a comparison result of the actual internal temperature change amount and the reference internal temperature change amount.

[0134] In one embodiment, the present application provides an electronic device, which can be a server, and an internal structure diagram of the electronic device can be as shown in Figure 5 The electronic device includes a processor, a memory and a network interface connected through a system bus. The processor of the electronic device is configured to provide computing and control capabilities. The memory of the electronic device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, a computer program and a database. The internal memory provides an environment for the operating system and the computer program in the non-volatile storage medium to run. The database of the electronic device is configured to store data. The network interface of the electronic device is configured to communicate with an external terminal through a network connection. The computer program is executed by the processor to implement a safety control method for an outdoor energy storage power supply.

[0135] Those skilled in the art can understand that Figure 5 The structure shown in the figure is only a block diagram of part of the structure related to the scheme of the present application, and does not constitute a limitation on the electronic device to which the scheme of the present application is applied. The specific electronic device can include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0136] In one embodiment, an electronic device is also provided, which includes a memory and a processor. The memory stores a computer program, and the processor implements the steps in each of the above method embodiments when executing the computer program.

[0137] Those skilled in the art can understand that all or part of the processes in the above-mentioned embodiment methods can be completed by instructing the relevant hardware through a computer program. The above-mentioned computer program can be stored in a non-volatile computer readable storage medium, and when the computer program is executed, the computer program can include the processes of the above-mentioned embodiments of each method. Wherein, any reference to memory, storage, database or other medium used in each embodiment provided by the present application can include at least one of non-volatile and volatile memory. The non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory or optical memory, etc. The volatile memory can include random access memory (RAM) or external cache memory. As an illustration but not as a limitation, the RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM), etc.

[0138] The above are preferred embodiments of the present application, not to limit the protection scope of the present application, therefore: all equivalent changes made according to the structure, shape, principle of the present application should be covered within the protection scope of the present application.

Claims

1. A safety control method for an outdoor energy storage power supply, characterized by, The method comprises the following steps: obtaining power supply working parameters of the outdoor energy storage power supply, and determining a current working state of the outdoor energy storage power supply according to the power supply working parameters; obtaining a current working power of the outdoor energy storage power supply when it is determined that the current working state is normal; obtaining environmental data of the environment surrounding the outdoor energy storage power supply collected by an environmental sensor in real time; predicting a reference internal temperature change amount of the outdoor energy storage power supply in a preset time period according to the current working power, technical specifications of the outdoor energy storage power supply, and the environmental data; obtaining an actual internal temperature change amount of the outdoor energy storage power supply in the preset time period; controlling the outdoor energy storage power supply to enter a working state corresponding to a comparison result of the actual internal temperature change amount and the reference internal temperature change amount; wherein the environmental data comprises environmental temperature, environmental humidity, and air flow speed, and the prediction of the reference internal temperature change amount of the outdoor energy storage power supply in the preset time period according to the current working power, the technical specifications of the outdoor energy storage power supply, and the environmental data comprises the following steps: obtaining the technical specifications of the outdoor energy storage power supply; detecting an internal temperature rise change rate of the outdoor energy storage power supply in a preset time period, wherein the preset time period is less than the preset time period; predicting the reference internal temperature change amount according to the current working power, the technical specifications, the environmental temperature, the environmental humidity, the air flow speed, the temperature rise change rate, and a random disturbance parameter; wherein the current working power comprises an input power of the outdoor energy storage power supply when it generates power through photovoltaic power generation and an output power of the outdoor energy storage power supply when it supplies power to an electric device, the technical specifications comprise an input efficiency of the outdoor energy storage power supply when it generates power through photovoltaic power generation, an output efficiency of the outdoor energy storage power supply to the electric device, a mass of the outdoor energy storage power supply, a surface area of the outdoor energy storage power supply, a heat capacity of a material of the outdoor energy storage power supply, and a heat dissipation efficiency of the material of the outdoor energy storage power supply; and the prediction of the reference internal temperature change amount according to the current working power, the technical specifications, the environmental temperature, the environmental humidity, the air flow speed, the temperature rise change rate, and the random disturbance parameter specifically comprises: calculating a heat generation amount of the outdoor energy storage power supply when it generates power through photovoltaic power generation according to the input efficiency, the preset time period, and the input power; calculating a heat generation amount of the outdoor energy storage power supply when it supplies power to the electric device according to the output efficiency, the preset time period, and the output power; calculating a heat exchange amount of the outdoor energy storage power supply with the environment according to the heat dissipation efficiency, the air flow speed, a convective heat transfer coefficient, the surface area, the environmental temperature, and an initial temperature of the outdoor energy storage power supply, wherein the convective heat transfer coefficient is determined according to the environmental temperature, the environmental humidity, and the air flow speed; calculating a heat generation amount caused by random disturbance according to the random disturbance parameter, the mass, and the heat capacity. According to the heat generated when the outdoor energy storage power supply generates photovoltaic power, the heat generated when the outdoor energy storage power supply supplies power to the electrical equipment, the heat exchange amount of the environment to the outdoor energy storage power supply, and the heat generated by the random disturbance, a first internal temperature change amount is calculated; According to the temperature rise rate and the preset time period, a second internal temperature change amount is calculated; According to the first internal temperature change amount and the second internal temperature change amount, the reference internal temperature change amount is determined.

2. The safety control method of an outdoor energy storage power source according to claim 1, characterized by, According to the comparison result of the actual internal temperature change amount and the reference internal temperature change amount, the outdoor energy storage power supply is controlled to enter a working state corresponding to the comparison result, including the following steps: When the temperature change directions of the actual internal temperature change amount and the reference internal temperature change amount are the same, the ratio of the actual internal temperature change amount and the reference internal temperature change amount is obtained; According to the ratio, the safety factor level of the working state is determined, and according to the safety level of the working state, the outdoor energy storage power supply is controlled to enter a working state corresponding to the comparison result, wherein the working state includes a normal state, a self-checking state, a slow charging and slow discharging state, a standby state, and a shutdown state, and the safety factor levels of the normal state, the self-checking state, the slow charging and slow discharging state, the standby state, and the shutdown state increase in turn.

3. The safety control method of an outdoor energy storage power source according to claim 1, characterized by, Before obtaining the technical specifications of the outdoor energy storage power supply, the following steps are further included: When the ambient temperature exceeds a preset ambient temperature threshold, the difference between the ambient temperature and the preset ambient temperature threshold is calculated; According to the difference, the amplitude value of reducing the current working power is determined, and the current working power is updated according to the amplitude value.

4. The safety control method of an outdoor energy storage power source according to claim 1, characterized by, After obtaining the current working power of the outdoor energy storage power supply, the following steps are further included: The current input power and the current output power of the current working state are compared; When the current input power is greater than the current output power, it is determined whether the outdoor energy storage power supply enters an overcharged state; When it is determined that the outdoor energy storage power supply enters an overcharged state, the collection efficiency of the input power is reduced; When the current output power is greater than the current input power, the remaining discharge capacity of the outdoor energy storage power supply is determined; When the remaining discharge capacity is lower than a preset minimum capacity, the collection efficiency of the input power is increased and the output power is reduced.

5. The safety control method of an outdoor energy storage power source according to claim 4, characterized by, The determination of whether the outdoor energy storage power supply enters an overcharged state includes the following steps: The terminal voltage of the outdoor energy storage power supply is monitored in real time, and when the terminal voltage is greater than a preset overcharged voltage threshold, it is preliminarily determined that the outdoor energy storage power supply enters an overcharged state; It is determined whether the power supply working parameter exceeds the working parameter threshold in the input-output working state; When it is determined that the power supply working parameter exceeds the working parameter threshold, it is finally determined that the outdoor energy storage power supply enters an overcharged state.

6. A safety control device for an outdoor energy storage power supply, characterized by, The safety control method of the outdoor energy storage power supply according to any one of claims 1-5 includes: A current working state acquisition module is configured to acquire the power supply working parameter of the outdoor energy storage power supply, and determine the current working state of the outdoor energy storage power supply according to the power supply working parameter. The current working power acquisition module is configured to acquire the current working power of the outdoor energy storage power supply when it is determined that the current working state is normal; The environmental data acquisition module is configured to acquire environmental data of the surrounding environment of the outdoor energy storage power supply collected by an environmental sensor in real time; The reference internal temperature change amount prediction module is configured to predict a reference internal temperature change amount of the outdoor energy storage power supply in a preset time period according to the current working power, the technical specifications of the outdoor energy storage power supply, and the environmental data; The actual internal temperature change amount acquisition module is configured to acquire an actual internal temperature change amount of the outdoor energy storage power supply in the preset time period; The control module is configured to control the outdoor energy storage power supply to enter a working state corresponding to a comparison result of the actual internal temperature change amount and the reference internal temperature change amount.

7. An electronic device, comprising: The computer program is executed by the processor to implement the steps of the safety control method of the outdoor energy storage power supply according to any one of claims 1-5.

8. A computer-readable storage medium having stored thereon a computer program, characterized in that, The computer program is executed by the processor to implement the steps of the safety control method of the outdoor energy storage power supply according to any one of claims 1-5.

Images